• 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:
    A drying machine has a drum (1), from which process air is first cooled in the evaporator (6) of a heat pump (2, 3, 5, 6) and then reheated in the condenser (3) of the heat pump (2, 3, 5, 6) becomes. A lint filter (12) is arranged between the drum (1) and the evaporator (6). The lint filter (12) is cooled by the evaporator (6). As a result, the lint filter (12) can be kept moist over at least a part of the process, as a result of which the filter effect is intensified.
    公开号:CH711590A2
    申请号:CH00047/17
    申请日:2017-01-13
    公开日:2017-03-31
    发明作者:Kerschdorfer Markus
    申请人:V-Zug Ag；
    IPC主号:
    专利说明:

    Description: FIELD OF THE INVENTION The invention relates to a clothes dryer with a lint filter and with a process air coolant for cooling and a process air heating means for heating process air.
    [0002] The invention also relates to a method for operating such a laundry dryer.
    BACKGROUND [0003] Tumble dryers of this type are known. In these devices, a process air circuit is provided, with which the process air can be fed back into the drum from the drum via the lint filter, the process air coolant and the process air heating medium.
    [0004] The task of the lint filter is to prevent large quantities of lint from reaching the cooling and / or process air heating means, from which they are difficult to remove.
    SUMMARY OF THE INVENTION [0005] The invention is based on the object of providing a laundry drier of this type with good filter action.
    [0006] This object is achieved by the laundry drier according to claim 1.
    [0007] Accordingly, the laundry drier has at least the following components: - A drum: This drum is used to hold clothes to be dried; A process air coolant suitable for cooling the process air so that its water is withdrawn; A process air heating means adapted to heat the process air so as to be able to recover water again; - A lint filter whose function is to keep lint from the heating and process air coolant as far as possible; - A process air cycle with which process air can be fed back from the drum via the lint filter, the process air coolant and the process air heating medium, and at least partially into the drum. - A filter coolant for cooling the lint filter. With this filter coolant, To cool the lint filter. As a result, water can be condensed out of the process air at the lint filter. This dampens the surface of the lint filter, so that lint will adhere better to it. In this way, the filtering effect is improved.
    The lint filter is advantageously coupled to the process air coolant for cooling, ie, the process air coolant is coupled to the lint filter in such a way that the lint filter can be cooled by the process air coolant during the drying process.
    [0009] In a particularly simple embodiment, the filter coolant and the process air coolant are implemented at least partially by common cooling components, ie the cold source for both coolants is the same. In particular, the filter coolant and the process air coolant are formed by the same cooling components, ie the process air coolant simultaneously serves as a filter coolant.
    [0010] Preferably, the lint filter is detachably connected to the filter coolant and can be taken from the tumble dryer. This is to be understood as meaning that the lint filter can be removed by the user of the device, preferably without tools. In this way, the lint filter can be cleaned by the user if necessary.
    [0011] Advantageously, the lint filter is provided with finer openings than the heat exchanger of the following process air coolant. In other words, the process air coolant has a heat exchanger with a minimum (smallest) channel size K, and the lint filter has openings with a maximum (largest) opening size F, where F <K. The difference between the two variables is preferably considerable, in particular F <K / 2, in particular F <K / 5. This ensures that the lint remains caught in the filter.
    [0012] Preferably, the lint filter is made of metal and / or ceramics. This is to be understood as meaning that the parts of the lint filter which are in contact with the process air are at least 90 percent by weight of these materials. This embodiment has the advantage that a lint filter with high thermal conductivity can be realized which is simple and evenly coolable.
    [0013] The invention also relates to a method for operating the laundry dryer, wherein the lint filter is held at a temperature below at least the dew point temperature of the filter during at least one part of a drying process, in particular during at least 10 minutes Process air in the lint filter.
    [0014] This method can be implemented by a suitable embodiment of the control of the device, which is achievable in the case of an electronic control by appropriate programming and in the case of a mechanical control by means of suitable mechanical design. Accordingly, the invention also relates to a washing machine with a correspondingly designed control.
    [0015] In the claimed laundry dryer, it is advantageous to use a pure dryer without a washing function. However, the term laundry dryer also includes clothes dryers, ie appliances in which laundry can be washed and then dried.
    BRIEF DESCRIPTION OF THE DRAWINGS [0016] Further configurations, advantages and applications of the invention result from the dependent claims and from the following description with reference to the figures. In this connection:
    1 shows a schematic view of the components of a first laundry dryer, FIG.
    2 shows the lint filter and the evaporator of the laundry dryer according to an exemplary embodiment, the lint filter and the vaporizer being shown in the form of an explosive drawing for the sake of clarity,
    FIG. 3 is a schematic view of the components of a second laundry dryer,
    FIG. 4 is a schematic view of the components of a third laundry dryer; and FIG
    FIG. 5 is a schematic view of the components of a fourth laundry dryer.
    DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Principles of the invention [0017] The laundry drier according to FIG. 1 has a drum 1 for accommodating the laundry to be dried. A process air circuit (which is shown in solid lines in FIG. 1) is provided in which heated process air is passed through the drum 1, then cooled and then reheated and guided back into the drum 1.
    In the process air circuit, in particular between the blower 10 and the drum 1, an additional electric heating system 9 can be provided, which allows the process air to be supplied with a targeted heat, for example at the start of the apparatus, or it can be used to measure the temperature level in the process air Process air circulation in general. The blower 10 serves to pump the process air.
    A heat pump circuit is also provided (the path of the medium conveyed by the heat pump circuit being indicated by dotted lines in FIG. 1). The medium is conveyed from a compressor 2 to a condenser 3, then to a vaporiser 6, for example in the form of a capillary or an expansion valve, to an evaporator 6 and then back again to the compressor 2. The evaporator 6 serves to cool the process air and It is thus possible to withdraw its water in this way, while the condenser 3 serves to heat the process air again, so that it can absorb new water.
    [0020] A controller 8 controls the components of the device.
    The air from the drum 1, which has absorbed moisture from the laundry, is first guided through at least one lint filter 12. It then enters the evaporator 6 of the heat pump, which serves as a process air coolant and in which the air is cooled, below its dew point, so that water condenses out. The separated water is collected by a condensate collecting tank 14.
    The now dried air reaches the condenser 3 of the heat pump, where it is again heated, so that it can again take up water. Then it is fed back into the drum 1.
    Optionally, the apparatus can be equipped with an additional heat exchanger 13a with which heat can be extracted from the system. For example, it is cooled by ambient air by a blower 13b. This technique is described in EP 1 884 586.
    Lint filter: As shown in FIG. 1, the lint filter 12 is in thermal contact with the evaporator 6 and is cooled by it. The control system 8 controls the process in such a way that the air is already cooled in the lint filter 12 below its dew point, so that water condenses in the region of the lint filter 12 and moistens the latter.
    [0025] In order to absorb excess water, the condensate collecting trough 14 advantageously extends not only under the evaporator 6, but also under the lint filter 12.
    As mentioned, the moistening of the lint filter 12 increases the filtering effect by keeping lint more adherent on the moist filter structure than on a dry filter.
    An example of a concrete embodiment of the lint filter 12 and its coupling to the heat exchanger 15 of the evaporator 6 is shown in FIG.
    In this embodiment, the lint filter 12 consists at least partially of metallic wires 16, which are stretched in a metallic frame 18. The process air is passed between the wires 16.
    As shown by the arrows 20 in FIG. 2, the lint filter 12 can be pushed onto the inlet side 22 of the heat exchanger 15, so that it is in direct contact with the heat exchanger 15, as shown in FIG. In this way, direct cooling of the lint filter 12 is achieved.
    In order to fasten the lint filter 12 to the heat exchanger 15, an insertion device is provided in the embodiment shown which, for example, has metallic tongues 24 which deform elastically during the insertion of the lint filter 12 on the heat exchanger 15 and hold the lint filter by frictional engagement. At the same time, these tongues 24 also form a metallic thermal bridge, which improves the heat transfer between the heat exchanger 15 and the lint filter 12.
    [0031] In addition, as an alternative to this, for example, a fastening via a snap-in device, via wing nuts or other fastening means, which can advantageously again form a thermal bridge between the lint filter 12 and the heat exchanger 15, is conceivable.
    The lint filter 12 has openings with a maximum expansion F. The minimum channel size of the heat exchanger 15 is designated by K. As mentioned at the outset, the expansion F is advantageously smaller than the channel size K, in particular F <K / 2, in particular F <K / 5. This reduces the risk of deposits in the heat exchanger. In addition, the air resistance of the filter and heat exchanger arrangement is kept small.
    Since, however, the process air is first guided through the lint filter 12 and only then through the heat exchanger 15, the condition F <K is not compulsory since the lint will in any case primarily deposit on the lint filter 12. In addition, the lint deposited on the lint filter produces a kind of lint carpet, which has an even finer opening size than the filter itself, thus unfolding additional filtering action.
    For cleaning, the lint filter 12 can be removed from the device and cleaned, for example, by brushing or under running water.
    An automatic cleaning of the lint filter 12 in the device, for example by flushing and / or by means of a mechanical wiping device, is also conceivable. In this case, it is also advantageous (even if not absolutely necessary) that the lint filter 12 can be separated from the heat exchanger 15 in a simple manner for periodic intensive cleaning, especially since the heat exchanger 15 is firmly connected to the pipes of the heat pump and therefore to the apparatus Is not readily apparent.
    Remarks: [0036] Advantageously, the lint filter 12 is made from a material with good thermal conductivity, in particular from metal. However, it is also conceivable, for example, to use a thermally well-conducting ceramic, for example aluminum nitride. This may be, for example, an open-pore ceramic or a ceramic structure formed in a different manner with holes.
    In the embodiment according to FIGS. 1 and 2, the lint filter 12 is directly in contact with the heat exchanger 15 of the evaporator 6. However, the heat-conducting contact can also be implemented indirectly, for example via heat bridges, such as metal ridges or so-called "heat pipes" Or "thermosiphons".
    In the embodiment according to FIGS. 1 and 2, the evaporator 6 of the heat pump, with which the process air is also cooled, serves as a filter coolant.
    As shown in FIG. 3, however, it is also conceivable to provide a separate filter coolant. For example, the lint filter can be cooled with a stream of ambient air, in which case the filter coolant, for example, is designed as a fan 26 and the lint filter acts as an air-to-air heat exchanger.
    Such an additional heat exchanger also makes it possible to extract excess heat from the process air circuit, as is described in EP 2 759 635.
    In the previous embodiments, the process air circuit is shown as a closed air circuit. However, it can also be designed to be at least partially open, in that a part of process air is decoupled at a suitable location and replaced by fresh air.
    In addition to the cooled lint filter 12, at least one additional lint filter 28 can also be provided in the process air stream between the drum 1 and the evaporator 6, as also indicated in FIG. This additional lint filter 28 is not necessarily cooled.
    [0043] A further embodiment of a clothes dryer is shown in FIG. Here the lint filter 12 is likewise cooled with ambient air, namely with the fan 13b, which also cools the additional heat exchanger 13a.
    FIG. 4 also shows the possibility of cooling the lint filter 12 not directly, but by means of a heat bridge 13c with the filter coolant 13d. The heat bridge 13c can be, for example, a metal bridge, a "heat pipe" or a thermosiphon.
    权利要求:
    Claims (13)
    [1] 1. A laundry dryer comprising a drum for receiving laundry to be dried, a process air coolant for cooling process air, a process air heating means for heating process air, a lint filter, a process air circuit , With which process air can be fed back into the drum (1) from the drum (1) via the lint filter (12), the process air coolant and the process air heating means (3), characterized by filter cooling means (6, 15; ; 30) for cooling the lint filter (12).
    [2] 2. The laundry drier as claimed in claim 1, wherein the filter coolant and the process air coolant are at least partially realized by common cooling components (6).
    [3] 3. A clothes dryer according to claim 1, wherein the lint filter (12) is detachably connected to the filter coolant (6, 15; 26; 30) and can be removed from the tumble dryer.
    [4] 4. The laundry drier according to claim 1, wherein the process air coolant has a heat exchanger with a minimum channel size K, wherein the lint filter has openings with a maximum opening size F, and wherein F <K, in particular F <K / 2, in particular F <K / 5.
    [5] 5. A laundry drier according to claim 1, comprising a control unit for controlling a drying process, wherein the control unit is configured to control the lint filter by means of the filter coolant during at least one of the filter coolant and the lint filter Of a part of the drying process, in particular during at least 10 minutes, at a temperature which is below the dew point temperature of the process air in the lint filter (12).
    [6] 6. A clothes dryer according to claim 1, wherein the lint filter is connectable to the filter coolant via a thermal bridge, in particular a metallic heat bridge, a heat pipe or a heat siphon.
    [7] 7. The clothes dryer according to claim 1, wherein the lint filter is in contact with an inlet side of a heat exchanger of the process air coolant.
    [8] 8. A clothes dryer according to claim 1, wherein the lint filter (12) consists at least partially of metallic wires (16) between which the process air is passed.
    [9] 9. A clothes dryer according to claim 1, wherein the lint filter is made of metal and / or ceramic.
    [10] 10. The laundry drier as claimed in claim 1, wherein a condensate collecting trough is arranged under the lint filter, and wherein the condensate collecting trough also extends below the process air coolant, extends.
    [11] 11. The clothes dryer as claimed in claim 1, wherein the filter coolant has a water cooling and in particular wherein the clothes dryer is designed to cool the lint filter by means of condensation water and / or the laundry drier Has a connection for the external supply of cooling water for the lint filter (12).
    [12] 12. The clothes dryer as claimed in claim 1, wherein the clothes dryer has a fan for cooling the lint filter, and in particular wherein the clothes dryer has a heat pump circuit for cooling the process air coolant and for biting the process air coolant (13a) for removing heat from the heat pump circuit, wherein the additional heat exchanger (13a) can also be cooled with the fan (13b). (DE). WIPO Home services World Intellectual Property Organization
    [13] 13. The method for operating the laundry dryer as claimed in claim 1, wherein the lint filter (12) is kept at a temperature during at least one part of a drying process, in particular for at least 10 minutes, by means of the filter coolant (6, 15; , Which is below the dew point temperature of the process air in the lint filter (12).
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    同族专利:
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    引用文献:
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    CH00047/17A|CH711590B1|2017-01-13|2017-01-13|Dryer with a cooled lint filter.|CH00047/17A| CH711590B1|2017-01-13|2017-01-13|Dryer with a cooled lint filter.|
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