• 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:
    REFRIGERATION APPLIANCE AND STORAGE METHOD FOR FRESH FOOD This is a refrigeration appliance (100), particularly for domestic use. The refrigeration apparatus comprises a first fresh food subcompartment (120) for storing fresh food in a first temperature range, at least a second fresh food subcompartment (125) for storing fresh food in a second lower temperature range whereas the first temperature range, a panel (130) separating the first and second fresh food subcompartments, an evaporator (145) for common refrigeration of both the first and second fresh food subcompartments - the evaporator being mounted on the rear of the refrigeration unit and separated from the fresh food sub-compartments by a rear panel (160) -, a main fan (135) provided on a rear wall (140) and passing through the rear panel to suck air from the first sub-compartment fresh food and to blow it in an intermediate space (165) and through the evaporator to be cooled; said air being returned to the first fresh food sub-compartment through the openings (170, 175) formed by the rear panel. The cooling device additionally comprises a secondary fan (155) adapted to suck air from the first sub-compartment (...).
    公开号:BR112013001705B1
    申请号:R112013001705-8
    申请日:2011-07-11
    公开日:2020-11-03
    发明作者:Marco Beni；Augusto Buosi；Vittorio Velli
    申请人:Electrolux Home Products Corporation N.V；
    IPC主号:
    专利说明:

    FIELD OF THE INVENTION
    [001] The present invention relates to refrigeration appliances, particularly refrigerators, for example, for domestic use. In particular, the present invention relates to refrigerators provided with two (or more) fresh food sub-compartments, designed to operate in different temperature ranges. BACKGROUND OF THE INVENTION
    [002] It is widely known that fresh food has to be stored properly so as not to spoil and preserve its nutritional qualities. It is also widely known that different foods have different storage requirements; for example, vegetables can be better stored and for a longer time if kept at a temperature close to zero degrees Celsius, while cheese can be stored for relatively long periods of time at temperatures close to room temperature (at least in temperate or cold climate).
    [003] It is also known that most foods lose, partially or totally, their nutritional qualities if they freeze (vegetables are, again, an example) avoiding the possibility of storing them in a freezer. In this way, the food has to be stored in a fresh food compartment in a refrigerator.
    [004] Refrigerators with two (or more) fresh food compartments that operate at a different temperature have been developed, achieving an increased storage capacity due to the different storage temperature ranges that allow different types of food to be stored optimally.
    [005] Various types of refrigerators with fresh food compartments kept at different temperature ranges have been developed. Typically, refrigerators with two fresh food compartments have one compartment that operates in the typical refrigerator temperature range (for example, from + 3 ° C to + 7 ° C), and another compartment that operates in a lower temperature range, typically close to zero degrees Celsius, typically 0 ° C to + 3 ° C.
    [006] An easy way to obtain fresh food compartments that operate at different temperature ranges is to provide an evaporator for each compartment. This solution, while guaranteeing good performances, increases the cost of the refrigerator to a non-competitive extent of the market. Another solution is to extract cold air from a freezer provided in the refrigerator (when the refrigerator is integrated with a freezer in a so-called combined refrigerator structure) and feed it to the low temperature compartment of fresh food. This solution that uses air at very low temperatures (typically -18 ° C to -27 ° C) can damage stored food if it is not designed and operated properly. An additional solution may be to use an evaporator shared with the other compartment (s). DESCRIPTION OF THE INVENTION
    [007] The purpose of the present invention is to provide a cost-effective refrigerator with one or more low temperature compartments to store food safely for relatively long periods of time.
    [008] An embodiment of the present invention relates to a refrigeration appliance, particularly for domestic use. The refrigerator comprises a first fresh food subcompartment for storing fresh food in a first temperature range, at least a second fresh food subcompartment for storing fresh food in a second temperature range lower than the first temperature range, a panel separating the first and second fresh food subcompartments, an evaporator for refrigeration common to both the first and second fresh food subcompartments, the evaporator is mounted on the rear of the refrigerator and is separated from the fresh food subcompartments by a rear panel, and a main fan provided on a rear wall and passing through the rear panel, to suck air from the first fresh food subcompartment and blow it into an intermediate space and through the evaporator to be cooled; said air returns to the first fresh food sub-compartment and reaches the second fresh food sub-compartment through openings formed by the rear panel. The refrigeration device additionally comprises a secondary fan adapted to suck air from the first fresh food sub-compartment and to blow it into the second fresh food sub-compartment in order to raise its temperature.
    [009] The preferred embodiments of the method are presented in the dependent claims.
    [0010] The separation panel has a substantially stepped shape, and comprises a first horizontal portion, a second horizontal portion at a higher level compared to the first horizontal portion, and a vertical portion that joins the first and second horizontal portions ; the secondary fan is mounted on the separation panel in correspondence to the vertical portion of it.
    [0011] The separation panel comprises a thermal insulation material or is made of it to thermally insulate the first fresh food subcompartment from the second fresh food subcompartment.
    [0012] The rear panel has side openings in the first fresh food subcompartment and a bottom opening in the second fresh food subcompartment.
    [0013] The panel is formed so as to leave at least one front and / or one rear gap between the separation panel and a cooling compartment door and between the separation panel and the rear panel, respectively.
    [0014] The refrigeration device additionally comprises a control unit for activating the main fan on a regular basis, with a first frequency that depends on a maximum prescribed temperature selectable by a user.
    [0015] The refrigeration device additionally comprises a first temperature sensor for detecting a temperature in the first fresh food sub-compartment, a control unit that is configured to activate the main fan when the first temperature sensor detects a higher temperature than the maximum prescribed temperature selectable by a user.
    [0016] The refrigeration device additionally comprises a second temperature sensor for detecting a temperature in the second fresh food subcompartment, the control unit being configured to activate the secondary fan when a second temperature sensor detects a lower than a minimum temperature.
    [0017] The control unit is configured to activate the secondary fan on a regular basis, with a second frequency that depends on the minimum temperature.
    [0018] The control unit is configured to activate the secondary fan when a difference, detected by the first temperature sensor, between the maximum prescribed temperature and the predetermined temperature difference is equal to the minimum or lower temperature than the same.
    [0019] The secondary fan is oriented so that the air blown by the secondary fan stops, at least partially, the air blown by the main fan and coming from outside the rear panel openings in the second fresh food compartment.
    [0020] The maximum temperature prescribed in the first fresh food subcompartment varies from + 3 ° C to + 7 ° C.
    [0021] The minimum temperature in the second fresh food subcompartment ranges from 0 ° C to + 3 ° C.
    [0022] A fresh food storage method comprising the steps of providing a refrigerator compartment comprising a first and a second fresh food sub-compartment; provide a panel for separating the first and second fresh food compartments; provide an evaporator; provide a rear panel for separating the evaporator from the first and second fresh food compartments; provide openings in the rear panel to allow fluid communication between the evaporator and the first and second fresh food compartments; provide a main fan that communicates with the evaporator and the first fresh food sub-compartment; providing a secondary fan that communicates with the first fresh food subcompartment and the second fresh food subcompartment; activate the main fan to keep the temperature of the first fresh food subcompartment below a maximum temperature and activate the secondary fan to keep the temperature of the second fresh food subcompartment above a minimum temperature. BRIEF DESCRIPTION OF THE DRAWINGS
    [0023] These and other features and advantages of the solution according to the present invention will be better understood with reference to the following detailed description of some of its achievements, provided for illustrative and non-restrictive purposes to be read in conjunction with the attached drawings. In this regard, it is expressly the intention that the drawings are not necessarily to scale and that, unless otherwise specified, they simply aim to illustrate the structures and procedures in a conceptual way. In particular:
    [0024] Figure 1 schematically shows a front view of a refrigerator, shown without doors, in accordance with an embodiment of the present invention.
    [0025] Figure 2 shows schematically a sectional view of the refrigerator of Figure 1 along line ll-ll. DESCRIPTION OF ACCOMPLISHMENTS OF THE INVENTION
    [0026] With reference to the drawings, in Figure 1 a front view of a refrigerator 100 is shown, without doors, according to an embodiment of the present invention. In particular, the refrigerator 100 is a so-called combined refrigerator that is provided with a freezer compartment 105 in the same housing 110 comprising a fresh food compartment 115. Fresh food compartment 115 is divided into a first sub-compartment of fresh food 120 and a second fresh food subcompartment 125, separated by a panel 130, preferably capable of providing thermal insulation. A main fan 135 is provided in the first fresh food subcompartment 120, preferably, although not limitingly, near the top of a rear wall 140. Embedded in the rear wall 140 and in correspondence with main fan 135, an evaporator 145 ( shown with a dotted line) is provided. The evaporator 145 extends vertically over most of the height of the first fresh food subcompartment 120 and has a lower portion 150 located in correspondence with the second fresh food subcompartment 125. A secondary fan 155 is associated with the panel 130. Preferably, the panel 130 has a substantially stepped shape, with a first horizontal portion 130a, of prevalent extent, a second horizontal portion 130b, closer to the rear wall 140 and at a higher level in relation to the first panel portion 130a, and a portion vertical 130c joining the first and second horizontal portions 130a and 130b. The secondary fan 155 is mounted on the panel 130 in correspondence with the vertical portion 130c thereof. In alternative embodiments of the invention, not shown, the panel separating the first and second fresh food compartments can be shaped differently, for example, it can be flat and the secondary fan can be mounted horizontally on it.
    [0027] Figure 2 shows schematically a sectional view (on a geometric axis ll-ll shown in Figure 1) of the refrigerator 100 of Figure 1. As can be seen, a rear panel 160 defines an intermediate space 165 with the the rear wall 140 and separates the evaporator 145 from the fresh food compartment 115. The main fan 135 passes through the rear panel 160 and reaches the intermediate space 165. Additionally, the rear panel 160 has a smaller width than the rear wall 140 leaving openings sides 170 that run along the vertical sides of the rear wall 140 of the fresh food compartment 115 for a length, preferably, although not limitingly, corresponding to the length of the evaporator 145. The panel 160 extends in the vertical direction for almost the entire height of the first fresh food subcompartment 120, and also in an upper portion of the second fresh food subcompartment 125. Therefore, the openings l terminals 170 extend over a main part of it in the first fresh food subcompartment 120 and in a shorter part of it in the second fresh food subcompartment 125.
    [0028] Another opening 175 is defined at the lower end of the rear panel 160, still between the panel 160 and the rear wall 140, for the second fresh food subcompartment 125. Due to the side openings 170 and the bottom opening 175, a communication fluid between the evaporator 145 and the fresh food compartment 115 is created. The opening 175 is preferably placed in front of the secondary fan 155.
    [0029] In additional embodiments of the invention not shown, the rear panel 160 can be replaced by rear panels provided with holes or a grid-like structure to create fluid communication between the evaporator and the fresh food compartment 115.
    [0030] Furthermore, the first horizontal portion 130a of panel 130 is of a length so as to leave a front gap 177 between a front door 178 of the fresh food compartment 115 and the panel 130 itself. Additionally or alternatively, a rear gap 179 can be provided between the rear panel 160 and the second horizontal portion 130b of panel 130.
    [0031] The operation of the refrigerator 100 is controlled by a refrigerator control unit 180. A first temperature sensor 185 and a second temperature sensor 190 can be provided in the first fresh food subcompartment 120 and the second fresh food subcompartment 125 , respectively, to allow refrigerator control unit 180 to monitor temperatures in both fresh food subcompartments 120 and 125.
    [0032] Referring now to both Figure 1 and Figure 2, the operation of refrigerator 100 will be described. Main fan 135 and evaporator 145 are activated by refrigerator control unit 180 to keep the first fresh food subcompartment 120 below a prescribed maximum temperature T, typically selected by a user; in more detail, the maximum prescribed temperature T is typically adjustable using, for example, a thermostat well known in the art (not shown in the figures) over a temperature range ranging from + 3 ° C to + 7 ° C. During its operation, the main fan 135 sucks air from the first fresh food subcompartment 120 and blows it into the intermediate space 165, where the air is cooled by the evaporator 145. The cooled air then partially returns to the first food subcompartment fresh 120 through openings 170 extending in the first fresh food subcompartment 120 and partially reaches the second fresh food subcompartment 125 through opening 175 and openings 170 extending in the second fresh food subcompartment 125. Thus, the temperature of the first fresh food sub-compartment 120 is lowered until it is brought below the maximum prescribed temperature T selected by the user. Once this condition is reached, evaporator 145 and main fan 135 are deactivated.
    [0033] At the same time, the temperature of the second fresh food subcompartment 125 is lowered. In particular, the temperature of the second fresh food subcompartment 125 is brought to a lower temperature than that of the first fresh food compartment 120. In more detail, due to the tendency of stratification of the air (cold air, being denser, is more heavy and thus remains in a lower position than hot air), cold air tends to remain confined to the second fresh food sub-compartment 125; furthermore, cold air at the bottom of the first fresh food subcompartment 120 tends to fall into the second fresh food compartment 125 through the front and rear gaps 177, 179.
    [0034] Furthermore, due to the structural design of the second fresh food subcompartment 125 (which is smaller than the first fresh food subcompartment 120 and thermally insulated from it by panel 130, the latter comprising or is preferably manufactured from at least one highly insulating material), when the refrigerator door is opened, the heat exchange with the external environment is less compared to that which occurs in relation to the first fresh food sub-compartment 120.
    [0035] In addition, the second fresh food subcompartment 125 is located above freezer compartment 105, which is at a very low temperature, so that no heat enters subcompartment 125 from the bottom thereof.
    [0036] However, the air reaching the second fresh food subcompartment 125 through the opening 175 and the bottom of the openings 170 is colder than the air reaching the first fresh food subcompartment 120 through the top of the openings 170 because the first one runs along the entire evaporator 145 before leaving the intermediate space 165. Even when the evaporator 145 and the main fan 135 are deactivated, because of the stratification trend mentioned above, the air is colder (since the evaporator remains at a low temperature for a relatively long period after it has been deactivated) tends to flow into the second fresh food subcompartment 125 through opening 175 and through openings 170 which extend at the bottom of rear panel 160.
    [0037] Panel 130 prevents air from the two fresh food subcompartments 120 and 125 from mixing to the point of reaching a common temperature (higher for the second fresh food subcompartment 125 and lower for the first food subcompartment) fresh 120 than the selected values).
    [0038] Refrigerator control unit 180 can also activate main fan 135 and evaporator 145 periodically (for example, using activation cycles of a predetermined duration with a frequency dependent on the temperature selected by the user), or by monitoring the temperature in the first fresh food subcompartment 120 by means of the first temperature sensor 185 provided inside it (that is, by activating the evaporator 145 and the main fan 135 whenever a temperature above the maximum prescribed temperature is detected).
    [0039] The secondary fan 155 is activated by the refrigerator control unit 180 in order to maintain the temperature of the second fresh food subcompartment 125 within a prescribed temperature range and, in particular, above a predetermined minimum temperature Tm em more details, the minimum temperature Tm is typically comprised in a range of food safe temperatures ranging from 0 ° C to + 3 ° C. Secondary fan 155 sucks air from the first fresh food subcompartment 120 and blows it to the second fresh food subcompartment 125. Such air has a higher temperature than the air in the second fresh food subcompartment 125, for the reasons discussed above. ; therefore, blowing air from the first fresh food compartment 120 to the second fresh food compartment 125 allows the temperature to rise in the second fresh food subcompartment 125 (to a point depending on the activation time of the secondary fan 155). Additionally, the air flow generated by the secondary fan 155 contrasts with an opposite air flow generated by the activation of the main fan 135 and which enters the second fresh food compartment 125 through the openings 170 (in the lower part of the panel 160) and the opening 175. Advantageously, the secondary fan 155 can be designed to generate air flow in order to completely or at least partially stop the opposite air flow coming from the intermediate space 165, preventing it from further cooling the second sub-compartment of fresh food 125, until its temperature has risen above the minimum temperature. In this type of operating condition (both fans 135 and 155 activated), the air leaves the second fresh food subcompartment 125 through the front and rear spans 177, 179. In contrast, when the main fan 135 is deactivated and the secondary fan 155 is activated, air flows from the second fresh food subcompartment 125 to the first fresh food subcompartment 120 through the front and rear spans 177, 179 and also through the openings 170, after being blown back by the secondary fan 155 to the intermediate space 165 through the opening 175.
    [0040] The control unit can activate the secondary fan 155 whenever a temperature equal to or lower than the minimum temperature Tm is detected by means of the second temperature sensor 190 provided inside the second fresh food subcompartment 125.
    [0041] Alternatively, the second fresh food subcompartment 125 is designed to have a lower temperature than the maximum prescribed temperature T of the first fresh food subcompartment 120 by a fixed temperature difference ΔT (e.g. 4 ° C). Thus, the secondary fan can be activated periodically by the control unit 180 (that is, using fan activation cycles of a predetermined duration with a frequency dependent on the maximum prescribed temperature T) to prevent the temperature in the second food sub-compartment fresh 125 drops below 0 ° C, only when the maximum prescribed temperature T of the first fresh food sub-compartment 120 is set at relatively low values (for example, between +3 and + 4 ° C) by the user. For example, when the maximum prescribed temperature T is set between +7 and + 5 ° C, the temperature in the second fresh food subcompartment 125 is in the range between +3 and + 1 ° C, so that the secondary fan 155 is always disabled. Conversely, when the maximum prescribed temperature T is set between +3 and + 4 ° C, the temperature in the second fresh food subcompartment 125 could fall to a range between -1 and 0 ° C, so that the secondary fan 155 will be periodically activated to keep it above 0 ° C. It should be appreciated that, in that case, there is no need for the second temperature sensor 190, the relative wiring and the corresponding circuits in the control unit 180 to control said second temperature sensor 190, leading to a cost reduction.
    [0042] The present invention has been described here with reference to its achievements, but it should be understood that various omissions, substitutions and changes in shape and details, as well as other achievements, are possible without departing from the scope of the present invention; moreover, it is the express intention that specific elements and / or steps of the method described in connection with the revealed embodiment of the invention can be incorporated into any realization as a matter of design choice.
    权利要求:
    Claims (14)
    [0001]
    1. REFRIGERATION APPLIANCE (100), particularly for domestic use, comprising a first fresh food compartment (120) for storing fresh food in a first temperature range, at least a second fresh food subcompartment (125) for storage of fresh food in a second temperature range lower than the first temperature range, a separation panel (130) separating the first and second sub-compartments (120, 125) of fresh food, a rear panel (160) parallel to a rear wall (140) of the refrigeration appliance and which defines with the rear wall an intermediate space (165), an evaporator (145) positioned in the intermediate space (165) for cooling both the first and the second sub-compartments (120, 125) fresh food and a main fan (135) to suck air from the first fresh food sub-compartment (120) and blow it into the intermediate space (165) so that it can flow through the evaporator (145), where the rear panel (160) has openings (170,175) that allow air blown into the intermediate space (165) to flow back to the first subcompartment (120) for fresh food and for the second subcompartment (125) for fresh food, characterized in that the refrigeration apparatus (100) additionally comprises a secondary fan (155) for sucking air from the first subcompartment (120) for fresh food and blowing it into the second subcompartment ( 125) of fresh food in order to raise its temperature.
    [0002]
    2. REFRIGERATION APPLIANCE (100), according to claim 1, characterized in that the separation panel (130) has a step shape, comprising a first horizontal portion (130a), a second horizontal portion (130b) at a lower level high compared to the first horizontal portion (130a) and a vertical portion (130c) that joins the first and second horizontal portions (130a, 130b), with the secondary fan (155) being mounted on the separation panel (130) corresponding to the vertical portion (130c) of the same.
    [0003]
    COOLING EQUIPMENT (100), according to any one of claims 1 to 2, characterized in that the separation panel (130) comprises a thermal insulation material or is manufactured from it to thermally insulate the first food sub-compartment (120) second fresh food compartment (125).
    [0004]
    COOLING EQUIPMENT (100) according to any one of claims 1 to 3, characterized in that the rear panel (160) has side openings (170) for the first and second sub-compartments (120, 125) of fresh food and a bottom opening (175) for the second fresh food subcompartment (125).
    [0005]
    5. REFRIGERATION APPLIANCE (100) according to any one of claims 1 to 4, characterized in that the panel (130) is formed in such a way as to leave at least one front gap (177) and / or one rear gap (179) between the separation panel (130) and a cooling compartment door (178) and between the separation panel (130) and the rear panel (160), respectively.
    [0006]
    6. COOLING EQUIPMENT (100), according to any one of claims 1 to 5, characterized in that it additionally comprises a control unit (180) for activating the main fan (135) in a regular manner, with a first frequency that depends on a maximum prescribed temperature selectable by a user.
    [0007]
    7. REFRIGERATION APPLIANCE (100) according to any one of claims 1 to 6, characterized in that it further comprises a first temperature sensor (185) for detecting a temperature in the first fresh food sub-compartment (120), a unit of control (180) that is configured to activate the main fan (135) when a temperature higher than a prescribed maximum temperature, selectable by a user, is detected by the first temperature sensor (185).
    [0008]
    8. REFRIGERATION APPLIANCE (100), according to claim 7, characterized in that it additionally comprises a second temperature sensor (190) for detecting a temperature in the second fresh food sub-compartment (125), the control unit ( 180) is configured to activate the secondary fan (155) when a temperature lower than a minimum temperature is detected by the second temperature sensor (190).
    [0009]
    9. COOLING EQUIPMENT (100), according to any one of claims 7 to 8, characterized in that the control unit (180) is configured to activate the secondary fan (155) regularly with a second frequency that depends on the minimum temperature .
    [0010]
    10. COOLING EQUIPMENT (100), according to any one of claims 7 to 9, characterized in that the control unit (180) is configured to activate the secondary fan (155) when a difference, detected by the first temperature sensor (185 ), between the prescribed maximum temperature and the predetermined temperature difference is equal to or less than the minimum temperature.
    [0011]
    11. COOLING EQUIPMENT (100), according to any one of claims 1 to 10, characterized in that the secondary fan (155) is oriented so that the air blown by the secondary fan (155) stops, the air blown by the fan (135 ) main and coming from outside from the openings (170, 175) of the rear panel (160) in the second compartment (125) of fresh food.
    [0012]
    12. REFRIGERATION APPLIANCE (100) according to any one of claims 1 to 11, characterized in that the maximum temperature prescribed in the first subcompartment (120) for fresh food varies from + 3 ° C to + 7 ° C.
    [0013]
    13. REFRIGERATION APPLIANCE (100) according to any one of claims 1 to 12, characterized by the minimum temperature in the second fresh food subcompartment (125) ranging from 0 ° C to + 3 ° C.
    [0014]
    14. FRESH FOOD STORAGE METHOD, characterized by comprising the steps of: - providing a refrigerator compartment comprising a first and a second sub-compartment (120, 125) of fresh food; - providing a panel for separating (130) the first and second sub-compartments (120, 125) of fresh food; - providing an evaporator (145); - providing a rear panel (160) for separating the evaporator (145) from the first and second sub-compartments (120, 125) of fresh food; - providing openings (170, 175) in the rear panel (160) to allow fluid communication between the evaporator (145) and the first and second sub-compartments (120, 125) of fresh food; - providing a main fan (135) that communicates with the evaporator (145) and the first subcompartment (120) of fresh food; - providing a secondary fan (155) that communicates with the first fresh food subcompartment (120) and the fresh food second subcompartment (125); - activating the main fan (135) to maintain the temperature of the first sub-compartment (120) of fresh food below a maximum temperature; and - activating the secondary fan (155) to maintain the temperature of the second sub-compartment (125) of fresh food above a minimum temperature.
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    法律状态:
    2018-12-26| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2019-11-19| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-05-26| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2020-11-03| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 11/07/2011, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    EP10170780A|EP2413074B1|2010-07-26|2010-07-26|Multi-compartment refrigerating apparatus for storing fresh food at different temperatures|
    EP10170780.0|2010-07-26|
    PCT/EP2011/061719|WO2012013478A1|2010-07-26|2011-07-11|Multi-compartment refrigerating apparatus for storing fresh food at different temperatures|
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