• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    WASHING CLOTHING APPLIANCE. It is a washing machine for washing, in particular, a dryer (2a) or a washing machine that has a drying function, comprising: a cabinet that has a front wall, a rear wall, side walls and a section of base, where the base section comprises an internal side facing the interior of the cabinet and an external side exposed to the exterior of the cabinet, a washing laundry storage chamber to treat laundry to be washed with the use of process air (A ), a process air circuit to circulate the process air through the laundry storage chamber and a heat pump system to dehumidify and heat the process air, where the heat pump system has a circuit refrigerant system comprising: a first heat exchanger (10) to heat a refrigerant and cool the process air (A), a second heat exchanger (12) to cool the refrigerant and heat the process air, an expansion device of refrig erant, a compressor and an auxiliary heat exchanger (13). According to the invention, the heat exchanger (...).
    公开号:BR112014007131B1
    申请号:R112014007131-4
    申请日:2012-09-26
    公开日:2021-02-02
    发明作者:Alberto BISON；Francesco CAVARRETTA；Massimiliano Vignocchi
    申请人:Electrolux Home Products Corporation N.V；
    IPC主号:
    专利说明:

    FIELD OF THE INVENTION
    [001] The invention relates to a laundry treatment apparatus that has a heat pump system in which the process air for treating laundry is dehumidified and heated. BACKGROUND OF THE INVENTION
    [002] In dryers that use a heat pump system to dehumidify and heat process air in a closed process air circuit, excess energy must be removed from the heat pump system once the system has reached a steady state of operation. The so-called stable state is an ideal operating state in which the evaporator's dehumidifying capacity and the condenser's heating capacity are optimized in view of the drying of the washing clothes and the energy consumption of the heat pump system. In the steady state, excess energy is the heat loss power introduced to the system by the compressor and which over time could trigger the system at an excessive temperature and suboptimal operation, if not removed. From the state of the art, different approaches are known to remove excess energy upon reaching the steady state.
    [003] A dryer that has a heat pump system to dehumidify and heat process air is known in WO 2008/086933 A. An auxiliary condenser cooled by ambient air is used to remove heat from the refrigerant circuit in the pump system. of heat.
    [004] In the dryer of EP 2 034 084 A1, an auxiliary condenser from the heat pump system is arranged in the bottom section between an ambient air blower and a compressor, so that the ambient air cools and removes excess heat of both, the auxiliary condenser and the compressor. DESCRIPTION OF THE INVENTION
    [005] It is an object of the invention to provide a laundry treatment apparatus that has a heat pump system in which an auxiliary heat exchanger is integrated in a compact manner.
    [006] The invention is defined in claim 1. Particular embodiments not shown in the dependent claims.
    [007] According to claim 1, a laundry washing apparatus that has a laundry storage chamber for treating laundry and a heat pump system for dehumidifying and heating the ventilated process air through the laundry storage chamber for washing is provided. To remove at least a portion of the energy exerted (ie, excessive temperature or thermal power) from the heat pump system, an auxiliary heat exchanger is provided that removes heat from the refrigerant circulating in the refrigerant circuit. The auxiliary heat exchanger can function as an auxiliary condenser or as a gas cooler in a transcritical or totally supercritical refrigerant cycling process. Preferably, the heat is transferred from the refrigerant to the ambient air that is available in the operating environment of the washing treatment apparatus.
    [008] The washing machine for washing has a cabinet comprising a front wall, a rear wall, side walls and a base section. The front wall may comprise a front top panel with an operating section and / or a front bottom panel that provides an external front cover of the base section. The cabinet defines the boundary or boundary region between the inside of the device and the outside of the device. The base section that represents or comprises a part of the cabinet thus also has an external side and an internal side in relation to the device. In conventional laundry washing appliances that have a heat pump system, such as heat pump dryers or washing machines, all components of the appliance - particularly the components of the heat pump system - are arranged on the inside the device.
    [009] According to the invention, the auxiliary heat exchanger is arranged on an external side of the base section. Preferably, the heat pump system is arranged completely or substantially on a base of the apparatus, preferably in the base section portion of the apparatus. So, supplying the auxiliary heat exchanger in the base section results in the advantage that it is arranged close to the other elements of the heat pump system. Preferably, the auxiliary heat exchanger on the outside of the base section is arranged below or essentially below a vertical height level of the other components of the heat pump system or refrigerant circuit. The other components of the heat pump system are a first and a second heat exchanger, a compressor, and preferably an expansion device. The main components of the heat pump system or refrigerant circuit are preferably arranged on or on a bottom housing which forms part of the bottom base section of the apparatus, where the bottom housing preferably forms the bottom cover or the cabinet element of the appliance.
    [010] By providing the auxiliary heat exchanger in this way in the base section of the device, a compact design or overall design of the heat pump system can be provided. This can, for example, be used to provide the appliance with a smaller external total size or to provide more internal space in the appliance cabinet for other components, for example, to enable a larger drum diameter in the case of a laundry storage compartment to wash the appliance, which is a rotating drum.
    [011] The auxiliary heat exchanger can be connected in the refrigerant circuit between the compressor and the second heat exchanger or between the second heat exchanger and the refrigerant expansion device. The first heat exchanger can operate as a gas evaporator or heater in a transcritical or totally supercritical refrigerant cycling process and the second heat exchanger can operate as a condenser or gas cooler in a transcritical or totally supercritical refrigerant cycling process.
    [012] In one embodiment, the base section forms or comprises on the inside of it at least a portion of a battery channel. The battery channel is a section of the process air channel that houses or houses at least partially the first and second heat exchangers. Alternatively or in addition, the base section supports the first and second heat exchangers and / or the heat pump system compressor.
    [013] Preferably, the base section comprises a bottom carcass that forms on the bottom cabinet part of the washing treatment apparatus. The bottom housing can be formed by a monolithic part, preferably a single plastic mold part. In one embodiment, the base section further comprises a top cover or housing that covers at least some of the components of the heat pump system that are arranged or mounted on the bottom housing. For example, the cover housing forms a portion of the process air channel, particularly the portion of the process air channel which forms a battery channel in which the first and second heat exchangers are arranged.
    [014] In a preferred embodiment, the base section, particularly a bottom housing that forms part of the base section, comprises a recess and / or a seat and / or mounting structure for receiving and / or securing the heat exchanger help. The recess is arranged on the outside of the base section (bottom housing) to receive the auxiliary heat exchanger completely or at least partially retracted from a position projected on the external face of the cabinet for mechanical protection of the auxiliary heat exchanger. Due to the mounting structure, which can include quick fittings, screw holes and / or alignment elements, the assembly of the auxiliary heat exchanger is simplified.
    [015] In a preferred embodiment, the base section, particularly a bottom housing that forms part of the base section, comprises a channel section in which the auxiliary heat exchanger is at least partially arranged, so that the cooling pass through the channel section.
    [016] Preferably, a blower is provided to flow the cooling air through the auxiliary heat exchanger. Preferably, the blower is operated under the control of a control unit so that the start, interruption, duration of operation, flow rate rate and / or direction of flow of the cooling air can be controlled. For example, the cooling air flow is initiated only when a predefined refrigerant temperature and / or pressure is detected in the refrigerant circuit. Actively triggering the cooling air flow also provides the advantage of adapting the auxiliary heat exchanger design and the cooling air path according to the location and technical requirements related to the location in which the auxiliary heat exchanger is provided.
    [017] In one embodiment, the blower is connected directly to the inlet or outlet of the auxiliary heat exchanger to have a compact design and / or the blower is arranged below a lint filter compartment provided in the process air channel.
    [018] In one embodiment, the blower and / or the auxiliary heat exchanger is arranged on an external surface or side of the base section, preferably the bottom housing, of the appliance. Preferably, the other components of the heat pump system are arranged inside or on an internal side of the base section or bottom housing. Most preferably, the blower and / or the auxiliary heat exchanger are mounted in the respective receiving recess (s) or compartment (s) of the base section or bottom housing. For example, the bottom housing provides external support structure and / or portions of side walls or of the blower housing and / or auxiliary heat exchanger. Thus, a cost-effective assembly structure is implemented. Preferably, the maximum external dimensions are not extended by supplying the blower and / or the auxiliary heat exchanger inside or in the external recess (s) or compartment (s).
    [019] When the blower is disposed laterally or vertically downwards or upwards in relation to the auxiliary heat exchanger, preferably a cooling air directing element or means is provided that guides the cooling air driven or sucked by the blower towards or from the auxiliary heat exchanger. The cooling air directing element is or comprises, for example, one or more of: a channel, a deflector, a flap, a nozzle, a damper or a combination thereof. By means of air directing (element), the heat exchange efficiency of the blown cooling air is increased. The air directing means is preferably adapted to concentrate the air flow to the surface of the auxiliary heat exchanger and / or to distribute it evenly over the area (inlet or outlet) of the auxiliary heat exchanger. Preferably, the air directing means is the portion of either the bottom housing and / or cover housing of the base section of the apparatus. Thus, a dual function is provided by the air directing means.
    [020] Preferably, the inlet opening (s) of the auxiliary heat exchanger and / or the blower is / are directed towards the front of the appliance and / or are / are arranged in front of the device to allow the suction of the ambient air. Additionally or alternatively, the outlet opening (s) of the auxiliary heat exchanger and / or the blower is / are directed to the rear side of the appliance and / or are / are arranged on the rear side or bottom side of the device, for example, to prevent a circulation circuit for cooling air between the cooling air inlet and outlet.
    [021] In one embodiment, the cooling air conducted by the blower is passed additionally over or through other components of the device, which can direct the air to or from them by cooling the air-directing means, such as a channel or air partition. cooling or deflection walls or elements. Such components are, for example: a drum drive motor, the compressor and power electronics of the device, such as drum motor and / or compressor drive electronics.
    [022] Preferably, the heat exchange surface (s) of the auxiliary heat exchanger is / are increased with the use of one or more thermally conductive elements such as: a corrugated metal plate, an element heat radiator, a heat exchanger cut, a heat exchanger fin or combinations thereof. One or more of them can be provided on or on a surface that is in contact with the cooling air (ie, outside the refrigerant piping).
    [023] The process air circuit is preferably a closed circuit in which the process air is continuously circulated through the laundry storage chamber. However, it can also be provided that a (preferably smaller) portion of the process air is exhausted from the process air circuit and fresh air (for example, ambient air) is taken up in the process air circuit to replace the process air. exhausted process. And / or the process air circuit is temporarily open (preferably only a short section of the total processing time) to have an open circuit discharge - which, for example, can be used to remove odor from laundry treated.
    [024] In one embodiment, a process air heat exchanger is provided to further preheat or cool the process air circulated in the process air circuit. The process air heat exchanger exchanges heat between the process air and the ambient air (air / air heat exchanger). Preferably, the process air heat exchanger is arranged within, in or forms a portion of a process air channel unit, for example, the front channel, more specifically a filter compartment. The channel section unit represents a section or portion of the process air circuit and is preferably a section that is not normally provided specifically for positioning or arranging the process air heat exchanger, but is a section which could also be provided if the heat pump system is designed without the process air heat exchanger. That is, the process air heat exchanger does not require extra design and / or extra components to integrate the process air heat exchanger into the process air circuit.
    [025] Preferably, the blower to supply cooling air to the auxiliary heat exchanger also blows cooling air to the process air heat exchanger. The common blower can supply the cooling air in parallel to the process air and auxiliary heat exchangers or first to the process air heat exchanger and then to the auxiliary heat exchanger or vice versa. The blower can be arranged between the process and auxiliary air heat exchangers, either downstream (sucking cooling air) or upstream (blowing cooling air) for them.
    [026] Preferably, the process air heat exchanger is arranged near and / or upstream of the first heat exchanger and downstream of the laundry storage chamber. Thus, the heat exchange efficiency and the efficiency of the heat pump system are optimized by the fact that thermal energy is removed from the process air in a hot, high-humidity state and a pre-cooling for the first heat exchanger. heat is provided. On the other hand, due to the proximity to the first heat exchanger, the condensate that forms in the process air heat exchanger can be directed or discharged to the condensate collection device provided for the first heat exchanger.
    [027] In a preferred embodiment, the channel section unit in which the process air heater is arranged or housed is a lint filter unit and / or is a service access unit of the apparatus. The lint filter unit is, for example, provided on the base of the device, preferably accessible from the front of the device, and has a lint filter that removes threads from the process air before entering the first heat exchanger. The integration of the process air heat exchanger with the lint filter unit means a minimum of adaptation and minimal alteration of the device and can thus be implemented at a cost-effective price. The same applies if the channel section unit is a service access unit that is used for maintenance, cleaning or service of the device's components. For example, the service access unit provides access from outside the enclosure apparatus to the interior of the process air circuit, for example, an opening in the enclosure and / or the process air channel to clean and / or remove fins of the heat exchanger of the first and / or the second heat exchanger.
    [028] According to one embodiment, the vertical dimension a of the auxiliary heat exchanger is less than one of the horizontal dimensions b, c of the auxiliary heat exchanger or is less than any of the horizontal dimensions b, c of the auxiliary heat exchanger. , or the area of the cooling air inlet and / or the area of the cooling air outlet of the auxiliary heat exchanger is smaller than at least one side area bxc of the auxiliary heat exchanger that is oriented parallel or essentially parallel to the path of main flow C of the cooling air through the auxiliary heat exchanger. In an alternative or additional embodiment, the ratio between the vertical dimension a and the largest horizontal dimension c of the auxiliary heat exchanger is less than or approximately 1: 2, 1: 3, 1: 5, 1: 8, or 1:10. In an alternative or additional embodiment, the length b of the cooling airflow path C through the auxiliary heat exchanger is greater than the minimum dimension a of the cross-sectional area axc perpendicular to the cooling airflow path through the exchanger auxiliary heat.
    [029] Thus, the auxiliary heat exchanger has a "flat" design and the cooling air flows in and escapes out on one side or "flat" edge, respectively. Plane means, for example, that the cooling air inlet and outlet area (particularly the cross-sectional area of the auxiliary heat exchanger in a sectional plane perpendicular to the cooling air flow path through the auxiliary heat exchanger) is smaller than the cross-sectional section of the auxiliary heat exchanger along a major geometry axis (ie, the largest cross-sectional area of a sectional plane parallel to the cooling air flow path). As a result, cross sections of air channels (as far as applicable) to guide the cooling air to and from the auxiliary heat exchanger and a blower to blow the cooling air are smaller compared to conventional auxiliary heat exchangers . Thus, the overall space or volume requirement for integrating the auxiliary heat exchanger into the device is significantly reduced.
    [030] The cooling capacity of the auxiliary heat exchanger is not provided by a large cross-section to pass the cooling air, but by a length of the cooling air path understood through the auxiliary heat exchanger. Preferably, the length of the cooling air path through the auxiliary heat exchanger is greater than at least the shortest inlet or outlet cross-sectional dimension. The preferred reasons for the auxiliary heat exchanger size are presented in the dependent claims or in the detailed description below, which are applicable for the auxiliary heat exchanger of the invention in general.
    [031] Due to the flat design, the auxiliary heat exchanger can be sandwiched between other components or elements of the device or in the bottom gap between the outer surface of a bottom housing and the floor on which the device is positioned. Or between a process air duct wall and the inner wall section of the device cabinet (for example, bottom case). For example, the auxiliary heat exchanger is arranged below a section of the process air channel in the bottom housing of the device. The process air channel preferably houses a first compartment and / or the battery (the first and second heat exchangers) and is tilted in the direction of process air flow to drain the condensate formed in the first heat exchanger in the direction to a condensate collection reservoir. Due to the inclined ramp, on the inlet side of the battery section (and the filter compartment) of the process air channel there is a wider gap between the bottom side of the channel and the upper side of the device location floor where the “flat” auxiliary heat exchanger can be conveniently arranged. BRIEF DESCRIPTION OF THE DRAWINGS
    [032] Reference is made in detail to the preferred embodiments of the invention, examples of which are illustrated in the attached figures, which show: Figure 1 - a schematic view of a dryer with a heat pump system, Figure 2 - a view of perspective bottom for a dryer that has an auxiliary heat exchanger integrated in a base unit, Figure 3 - the base unit of Figure 2 in cross section showing the cooling process and air flow, Figure 4 - a view bottom view for a dryer that has an auxiliary heat exchanger integrated in a base unit according to another embodiment, Figure 5 - the base unit of Figure 4 in cross section showing the cooling process and air flow and Figure 6 - a main diagram of the dimensions of the auxiliary heat exchanger. DESCRIPTION OF ACCOMPLISHMENTS OF THE INVENTION
    [033] Figure 1 represents a schematic representation of an appliance2, which in this embodiment is a clothes dryer with a heat pump. The clothes dryer comprises a heat pump system 4, including in a closed refrigerant circuit in that order of refrigerant flow B: a first heat exchanger 10 that acts as an evaporator to evaporate the refrigerant and cool the process air, a compressor 14, a second heat exchanger 12 that acts as a condenser to cool the refrigerant and heat the process air, an auxiliary heat exchanger 13 that acts as an auxiliary condenser and transfers heat to the cooling air and an expansion device 16 from where the refrigerant is returned to the first heat exchanger 10. Together with the refrigerant tubes that connect the components of the heat pump system 4 in series, the heat pump system forms a refrigerant circuit 6 through which the refrigerant is circulated by compressor 14 as indicated by arrow B. If the refrigerant in the heat pump system is operated in the transcritical or totally supercritical state, the first section heat exchanger 10 can act as a gas heater and the second and auxiliary heat exchanger 12, 13 can act as gas coolers. The main components of the heat pump system 4 are arranged in a base section 5 or foundation of the dryer 2, different realizations of which are shown in the following figures.
    [034] Expansion device 16 is a controllable valve that operates under the control of a control unit to adapt the flow resistance to the refrigerant depending on the operating states of the heat pump system 4. In alternative embodiments, the device expansion valve 16 can be a capillary tube, a valve with fixed expansion cross-section, a regulating valve with variable cross-section that automatically adapts the expansion cross-section depending on the refrigerant pressure (for example, by elastic induction or by spring), a regulating valve in which the expansion cross-section is adapted depending on the temperature of the refrigerant (for example, by actuation of a thermostat and / or in which the temperature of the refrigerant is taken in a predefined component among the components, in thermal contact with the soda.
    [035] The process air flow inside the appliance 2 is guided through a compartment 18 of the appliance 2, that is, through a compartment 18 to receive articles to be treated, for example, a drum 18. The articles to be treated they are fabrics, clothes to wash 19, clothes, shoes or similar. In the realizations, fabrics, laundry or clothing are preferably used. The process air flow is indicated by the arrows A in the Figures and is driven by a process air blower 8. The process air channel 20 guides the process air flow A out of the barrel 18 and includes different sections, including the section forming the battery channel 20a in which the first and second heat exchangers 10, 12 are arranged. Process air exiting the second heat exchanger 12 flows into a rear channel 20b in which the process air blower 8 is disposed. The air driven by the blower 8 is guided upwards in an elevated channel 20c to the rear side of the drum 18. The air leaving the drum 18 through the drum outlet (which is the loading opening 46 of the drum) is filtered by a first lint filter 22 disposed near the drum outlet within or in a front channel 20d. Then, the process air flows through a second lint filter 24 disposed next to the first heat exchanger 10. The first and second lint filters 22, 24 are disposed in the front channel 20d which forms another channel section 20 which is rear and adjacent to the front cover of the dryer 2. Optionally, the front channel 20d further houses and / or is partially formed by an air / air heat exchanger 26 that is at least partially arranged in a lint filter compartment of the channel 20d. The lint filter compartment houses the second lint filter 24 and is covered by a filter port 50 shown in the following figures.
    [036] During the operation of dryer 2, the auxiliary heat exchanger 13 transfers heat from the process air to the ambient air, which is also denoted as cooling air C in the following. By transferring heat to the cooling air, during a stable operating state of the heat pump system 4, excess heat is removed from the heat exchange closed circuits of the process air circuit and the refrigerant circuit 6. Thus, the electrical power consumed by the compressor 14 and which is not transformed into working power by compression of the refrigerant, that is, the lost heat power from the compressor, is removed - under ideal consideration - from the closed refrigerant and process air circuits. This means that in the stable state of operation of the heat pump system, in which maximum or almost maximum efficiency or operating condition is reached after the heating period, the heat deposited by the compressor in the refrigerant circuit 6 has to be removed by the exchanger auxiliary heat 13 to prevent overheating. Optionally and in addition, the air / air heat exchanger mentioned above 26 is provided to preheat the process air before entering the first heat exchanger 10. The cooling air conveyed by the blower 28 through the auxiliary heat exchanger 13 can also be guided through the air / air heat exchanger 26 which can be arranged downstream or upstream of the auxiliary heat exchanger 13 and / or the blower 28 in relation to the cooling air flow C.
    [037] According to the invention, excess heat can be removed only or exclusively using the auxiliary heat exchanger 13 as the heat sink for excessive heat (n / a considering non-ideal heat loss, as drum heat transfer or heat radiation in the refrigerant conduction components). The cooling air flow C, which is an ambient air flow in the embodiments, is taking on calluses from the heat exchange surfaces of the auxiliary heat exchanger 13 (compared to refrigerant piping 66 shown in Figure 6). The blower 28 can blow air to or suck air from the auxiliary heat exchanger 13. In the following embodiments, reference numerals 28a and 28b are also used for the blower that conducts air flow C. Air flow C can be used exclusively to cool the auxiliary heat exchanger 13. However, in one embodiment, it can also be provided that downstream or upstream (in relation to the flow direction) the compressor 14 is cooled by the air flow C driven by the blower 28. The air flow in relation to the compressor can be forward or backward, that is, sucking from or blowing into the compressor. Preferably, the blower 28 is operated as soon as the steady state is reached or is near. Preferably, the blower operates continuously when the steady state is reached or is near during the running drying circuit. Or the blower is operated according to the cooling needs continuously or with variable driving speed.
    [038] The auxiliary heat exchanger 13 that acts as an additional condenser (or gas cooler in the case of transcritical or totally supercritical operation of the refrigerant cycle) is connected to the refrigerant circuit as indicated by refrigerant piping 6 in Figure 1. In embodiments not shown, the sequence of components in the refrigerant circuit 6 can be modified in which the auxiliary heat exchanger 34 is not positioned between the second heat exchanger 12 and the expansion device 16 in relation to the refrigerant flow, but between the compressor 14 and the second heat exchanger 12. This modification is applicable to all embodiments in this document.
    [039] At least when the heat pump system 4 is operating in the steady state (ie, normal mode after the warm-up period, that is, after starting the heat pump system 4 from the low temperature state and low refrigerant pressure), the first heat exchanger 10 transfers heat from process air A to the refrigerant. By cooling the process air to lower temperatures, the moisture in the process air condenses in the first heat exchanger 10, is collected in it and the collected condensate is drained to a condensate collector 30. The process air is cooled and dehumidified when it passes through the first heat exchanger and then passes through the second heat exchanger 12 where the heat is transferred from the refrigerant to the process air. The process air is sucked from the exchanger 12 by the blower 8 and is activated in the drum 18 in which it heats the laundry to wash 19 and receives the humidity of the same. The process air leaves the drum 18 and is guided in the front channel 20d back to the first heat exchanger 10.
    [040] Figure 2 shows a bottom perspective view for the base section of the dryer 5 that forms the bottom part of a dryer cabinet 40 for a dryer 2a of the first embodiment. The main components of the heat pump system 4 (except the control electronics which is arranged in a top section of the dryer) are arranged in a bottom housing 48 which also forms parts of the process air channel 20, including the channel battery 20a (where the first and second heat exchanger 10, 12 are involved), the rear channel 20b, the elevated channel portion (not shown) and the front channel portion 20d. In addition, the case is formed by two side covers (only one case side wall 42 shown), a case front wall 44 (partially shown) and a case top cover (not shown). In Figures 2 to 5, the loading opening 46 in the front wall of cabinet 44 for loading laundry to wash in and out of the drum 18 is shown. At the base of the dryer, a front bottom panel, which normally covers the filter port 50, the front of the bottom housing 48 and has cooling air inlet openings (for blower 28a, 28b), is removed in Figures 2 to 5.
    [041] As can be seen from the bottom perspective view, the auxiliary heat exchanger 13 is disposed below the filter channel section of the front channel 20d and below the battery channel portion 20a on the bottom side of the housing bottom 48. The auxiliary heat exchanger 13 has its cooling air inlet 60 (compared to Figure 6) towards the front side of the dryer 2a and cooling air outlet opening 54 towards the rear side of the dryer. . The cooling air exhausted from the auxiliary heat exchanger 13 is distributed in the gap between the bottom side of the housing 48 and the base floor on which the dryer is located and flows from it mainly to the rear side of the dryer. The auxiliary heat exchanger 13 is housed between a portion of the bottom wall of the bottom housing 48 and a bottom cover 52 attached to the bottom wall of the housing 48. Both define the designs of the inlet 60 and the outlet 54, each with a corresponding cross-sectional area. Inlet 60 and / or outlet 54 may have cuts or a grid for stability and / or as a protective cover. Depending on the direction of the cooling air flow C, the input / output function can be reversed.
    [042] The blower outlet of the tangential blower 28a is connected to the inlet 60 of the auxiliary heat exchanger 13 by blowing the cooling air through the exchanger 13. The blower 28a has air inlet openings 56 facing the front of the dryer 2a to suck the cooling air from the room on the front bottom side of the dryer. The inlet openings 56 are arranged below the filter port 50 and the blower 28a is arranged in a front bottom edge recess formed in the bottom housing 48. The auxiliary heat exchanger 13, that is, its heat exchange parts , are arranged in a respective compartment or changer recess on the outer side of the bottom housing 48.
    [043] Figure 3 shows a perspective view for a partially cut section of base 5 indicating the flow paths of process air A and cooling air C. Process air A descends in the front channel 20d from the opening front and is laterally deflected on channel 20d to the filter compartment of channel 20d. In the filter compartment, a filter drawer 51 is inserted supporting the second lint filter 24 which is arranged in front of the first heat exchanger 10. The filter drawer 51 with the lint filter 24 can be removed from the filter compartment by user after opening filter door 50 to remove lint from the filter. The process air passes through the filter 24 and then flows through the first and second heat exchangers 10, 12 into the battery channel 20a.
    [044] The cooling air flow C enters the blower 28a through the openings 56. The openings 56 are formed in a grid that is integrated with the blower 28a which is fixed to the external side of the bottom housing 48 and is received in a respective external recess of the bottom housing. The blower outlet is connected to the inlet opening 53 (Figure 6) of the auxiliary heat exchanger 13 so that the cooling air is driven by the blower 28a through the cooling air passage of the auxiliary heat exchanger 13 where it leaves through the outlet openings 54. As mentioned above, the direction of cooling air flow can be reversed, for example, with the use of a tangential blower 28a with the geometry of blower blades and housing respectively adapted.
    [045] Figure 4 shows another embodiment of a dryer 2b that is basically identical to dryer 2a with the difference that the blower is not disposed in front of and adjacent to the auxiliary heat exchanger 13, but a blower 28b is disposed laterally displaced in relative to the auxiliary heat exchanger 13 in the inner front region of the bottom housing 48. The blower 28b is a radial or centrifugal blower that blows the cooling air C into a cooling air channel 58. The cooling air channel 58 is extends between the outlet of the blower 28b and the inlet 53 of the auxiliary heat exchanger 13 and passes from a right front region of the bottom housing 48 to the left bottom side of the bottom housing. This means that the blower 28ba and part of the channel 58 are arranged inside the housing 48 (that is, not outside the housing 48 (after mounting the bottom front panel not shown)) and part of the channel 58 is arranged on the side frame bottom external 48. In this embodiment, the arrangement and details of the auxiliary heat exchanger 13 are identical to that of the embodiment in Figures 2 and 3.
    [046] Figure 5 is an enlarged view of Figure 4 with the left portion partially cut, in which the cross section is through the front and battery channels 20d, 20a, channel 58 and the auxiliary heat exchanger 13. The flow process air A and the channels that guide it with the second lint filter arrangement are as shown in Figures 2 and 3. Cooling air C is sucked through the openings in a front bottom panel (not shown) and a inlet opening 60 of blower 28b. The blower drives the cooling air flow C through channel 58, inlet 53 and through the auxiliary heat exchanger 13 where it is exhausted through the openings 54. Again, the direction of the cooling air flow can be reversed and , for this purpose, the blower inlet 60 can be connected to channel 58 or a tangential blower can be used instead of the radial blower 28b.
    [047] Figure 6 schematically represents the auxiliary heat exchanger 13 and indicates its dimensions. Cooling air enters through inlet 53 which has a cross-sectional area perpendicular to the flow path. The cooling air exits through the outlet opening 54 which has a cross-sectional area perpendicular to the flow path. The side walls 62 may be formed from a bottom frame wall structure 48 or from the side walls provided by the bottom cover 52 or the side walls 62 may be partially formed from a frame wall structure 48 and the cover 52. top cover 64 is preferably formed by the outer bottom wall of bottom housing 48 and the bottom cover is preferably provided by bottom cover 52. The walls define a volume in which the refrigerant pipe 66 is willing. The pipe 66 may be provided with heat exchanging surfaces to enlarge the heat exchange surface area, for example, cuts, heat radiators, a grid structure or the like.
    [048] Compared to conventional heat exchangers and also compared to the first and second heat exchangers 10, 12, the flow path length b (or depth) is greater than at least one (here a) exchanger dimension through the flow path C. The ratio between the flow path length b and the height dimension a and / or width dimension c is or is at least, for example, 1.5, 2, 3, 4, 5, 6, 8 or 10. In particular, the area of top and bottom sides 64 is greater than the area of entrance 53 or exit 54, preferably the ratio between the area of top and / or bottom and the area of entry and / or exit is or is at least 1.5, 2, 3, 4, 5, 6, 8 or 10. Thus, a "flat" auxiliary heat exchanger 13 is provided that can be integrated or inserted into gaps between elements, in niches of Obviously, in the embodiments, the auxiliary heat exchanger 13 can be oriented to have the inlet 53 and the outlet 54 in a vertical plane (as in the Figures), but with the dimension longer is oriented vertically and the shorter dimension is oriented horizontally. Either the input 53 and the output 54 can be in a horizontal plane or be inclined in relation to the horizontal and / or vertical plane. For example, in one embodiment, the auxiliary heat exchanger can be arranged between the battery channel 20a and the outer cabinet wall (for example, in Figures 2 and 4, the left side wall of cabinet 42), in which the air cooling element is sucked by the blower (arranged, for example, in the entrance 53 similar to the arrangement of elements 13 / 28a) through the side openings in front of the bottom housing 48 and exhaust the cooling air through the openings in the rear of the bottom housing 48. Or it can be arranged flat on top of the cover housing 49 partially shown in Figure 5. Compared to auxiliary heat exchangers, the auxiliary heat exchanger 13 according to the invention has a small area requirement for the cross section of the cooling air and provides more design freedom to integrate it into the dryer narrowly spaced inside locations or spans or external excesses.
    [049] Individual components or group of components shown and described for the above achievements can be combined with each other in any convenient way. NUMERICAL REFERENCE LISTING: 2, 2a, 2b clothes dryer 4 heat pump system 5 base section 6 refrigerant circuit 8 blower 10 first heat exchanger (evaporator) 12 second heat exchanger (condenser) 13 auxiliary heat exchanger (auxiliary condenser) 14 compressor 16 expansion device 18 drum (laundry compartment for washing) 19 laundry for washing 20 process air channel 20a battery channel 20b rear channel 20c elevation channel 20d front channel 22 first lint filter 24 seconds lint filter 26 air / air heat exchanger 28, 28a, 28b blower 30 condensate collector 40 cabinet 42 cabinet side wall 44 cabinet front wall 46 loading opening 48 bottom housing 49 cover housing 50 filter door 51 drawer filter 52 bottom cover 53 inlet opening (area) 54 outlet opening (area) 56 inlet opening 58 cooling air channel 60 inlet (area) 62 side wall (area) 64 wall d and top / bottom (area) 66 refrigerant piping A process air flow B refrigerant flow C cooling air flow a, b, c other dimensions of the auxiliary heat exchanger
    权利要求:
    Claims (18)
    [0001]
    1. WASHING CLOTHING APPLIANCE, in particular, a dryer (2, 2a, 2b) or a washing machine that has a drying function, comprising: a cabinet (40) that has a front wall (44), a back wall , side walls (42) and a base section (5, 48, 49), in which the base section (5, 48, 49) comprises an internal side facing the interior of the cabinet and an external side exposed to the exterior of the cabinet. cabinet (40), a washing laundry storage chamber (18) arranged inside the cabinet (40) to treat washing clothes (19) using process air (A), a process air circuit ( 18, 20) to circulate the process air through the washing laundry storage chamber (18), and a heat pump system (4) to dehumidify and heat the process air, in which the heat pump system has a refrigerant circuit (6) comprising: a first heat exchanger (10) to heat a refrigerant and cool the process air (A), a second exchanger heat (12) to cool a refrigerant and heat the process air, a refrigerant expansion device (16), a compressor (14), and an auxiliary heat exchanger (13); characterized by the auxiliary heat exchanger (13) being arranged on the outside of the base section (5, 48, 49).
    [0002]
    2. APPLIANCE according to claim 1, characterized in that the base section (5, 48, 49) forms, on the inside, at least a portion of a battery channel (20a) of the process air circuit (18, 20) to house the first heat exchanger (10) and the second heat exchanger (12).
    [0003]
    Apparatus according to any one of claims 1 to 2, characterized by the internal side of the base section (5, 48, 49) supporting the first heat exchanger (10) and the second heat exchanger (12).
    [0004]
    APPLIANCE according to any one of claims 1 to 3, characterized in that the inner side of the base section (5, 48, 49) forms a seat for the compressor (14).
    [0005]
    Apparatus according to any one of claims 1 to 4, characterized in that the external side of the base section (5, 48, 49) comprises a recess and / or mounting structure for receiving the auxiliary heat exchanger (13).
    [0006]
    Apparatus according to any one of claims 1 to 5, characterized in that the base section (5, 48, 49) comprises a bottom housing (48) and a cover housing (49) that together form the battery channel (20a), in which the auxiliary heat exchanger (13) is arranged in the bottom housing (48).
    [0007]
    Apparatus according to any one of claims 1 to 6, characterized in that it comprises a blower (28, 28a, 28b) for blowing or sucking cooling air (C) through the auxiliary heat exchanger (13).
    [0008]
    8. APPLIANCE, according to claim 7, characterized in that the blower (28a) is arranged on the bottom of the base section (5, 48, 49) or on the outside of the base section (5, 48, 49) in or on proximity to an inlet (53) or an outlet (54) of cooling air in the auxiliary heat exchanger (13).
    [0009]
    Apparatus according to any one of claims 7 to 8, characterized in that the blower (28a) is arranged below a channel section unit (20d) of the process air circuit (20).
    [0010]
    10. Apparatus according to any one of claims 7 to 8, characterized in that the blower (28b) is arranged in the base section (5, 48, 49) or the bottom housing (48) of the base section is displaced laterally in relative to the auxiliary heat exchanger (13) and an air directing means (58) be provided to guide the air from the blower to the auxiliary heat exchanger or from the auxiliary heat exchanger to the blower.
    [0011]
    11. APPLIANCE, according to claim 10, characterized in that the air directing means (58) is a channel that extends from a first lateral front region in the base section (5, 48, 49) or in the bottom (48) to a second front side region on the bottom side of the cabinet (40).
    [0012]
    Apparatus according to any one of claims 7 to 11, characterized in that the blower (28, 28a, 28b) is a radial blower (28b) or a tangential blower (28a).
    [0013]
    13. Apparatus according to any one of claims 7 to 12, characterized in that the blower (28, 28a, 28b) sucks or blows the cooling air (C) through at least one opening in the front wall (44) of the appliance or through openings in a front bottom panel of the cabinet (40).
    [0014]
    Apparatus according to any one of claims 7 to 13, characterized in that the blower (28, 28a, 28b) sucks or blows the cooling air (C) through at least one opening (54) on the bottom side of the cabinet (40) or on the rear side of the cabinet (40) or at least one opening to the inside of the cabinet (40).
    [0015]
    15. Apparatus according to claim 14, characterized in that the device cabinet (40) has ventilation openings in a bottom housing (48), in the side wall of the case (42) or in the rear wall of the case.
    [0016]
    16. Apparatus according to any one of claims 1 to 15, characterized in that it comprises directing means for guiding the cooling air of the auxiliary heat exchanger (13) to one or more of the following or one or more of the following to the auxiliary heat exchanger (13): the compressor (14), a drum drive motor for the device and power electronics for the device.
    [0017]
    17. Apparatus according to any one of claims 1 to 16, characterized in that it comprises a process air heat exchanger (26), wherein the process air heat exchanger (26) is at least partially integrated in the or it is part of the channel section unit (20d) arranged in the base section (5) or in the bottom housing (48) of the apparatus, where the channel section unit (20d) forms part of an air channel section process air of the process air circuit (20), and in which the process air heat exchanger (26) is adapted to exchange heat between the process air (A) and the cooling air (C).
    [0018]
    18. Apparatus according to claim 17, characterized in that the blower (28, 28a, 28b) additionally blows the cooling air (C) into the process air heat exchanger (26) or sucks it from the heat exchanger process air.
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    同族专利:
    公开号 | 公开日
    US20140223758A1|2014-08-14|
    CN103906874B|2016-06-15|
    EP2573252B1|2014-05-07|
    AU2012314534B2|2017-03-02|
    RU2014116894A|2015-11-10|
    EP2573252A1|2013-03-27|
    AU2012314534A1|2014-04-03|
    CN103906874A|2014-07-02|
    WO2013045477A1|2013-04-04|
    BR112014007131A2|2017-04-11|
    US9249538B2|2016-02-02|
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    法律状态:
    2018-03-27| B06F| Objections, documents and/or translations needed after an examination request according art. 34 industrial property law|
    2019-08-06| B06U| Preliminary requirement: requests with searches performed by other patent offices: suspension of the patent application procedure|
    2020-12-01| B09A| Decision: intention to grant|
    2021-02-02| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 26/09/2012, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    EP11182775.4A|EP2573252B1|2011-09-26|2011-09-26|Laundry treatment apparatus with heat pump|
    EP11182775.4|2011-09-26|
    PCT/EP2012/068931|WO2013045477A1|2011-09-26|2012-09-26|Laundry treatment apparatus with heat pump|
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