• 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:
    In a refrigerator, two cooling compartments (3, 4) and a cooling unit (5) are provided. Cooling air can be selectively circulated between the cooling unit (5) and the two cooling compartments (3, 4) via a cooling air flap (10). The cooling air flap (10) is driven by a drive, in particular a stepping motor. To reduce the risk of condensate and ice formation, the drive is supplied with a heating current.
    公开号:CH713694A2
    申请号:CH00890/18
    申请日:2018-07-18
    公开日:2018-10-15
    发明作者:Bachmann Adrian；Diana Emanuele
    申请人:V Zug Ag；
    IPC主号:
    专利说明:

    Description Field of the Invention The invention relates to a refrigeration appliance having a cooling air damper for switching a flow of cooling air.
    Background CH 711 098 describes a refrigerating appliance of this type. It has a refrigerating unit through which cooling air is required. To direct the cooling air through two different Kühlfacher, a cooling air flap is further provided.
    In principle, there is the risk of icing in the region of the cooling air flap in refrigerators of this type. DESCRIPTION OF THE INVENTION It is an object of the present invention to provide a cooling device of the type mentioned in the introduction in which the risk of icing in the region of the cooling air flap is reduced.
    This object is achieved by Kühlgerät of claim 1. Accordingly, the cooling unit has the following components: - A cooling unit: This is used to cool the cooling unit. Preferably, the cooling unit comprises the evaporator of a heat pump. - A cooling air flap: The cooling air flap is designed to be able to switch a flow of cooling air in the refrigerator, i. to block, throttle or steer in different directions. - One drive: The drive is designed to move the cooling air damper. - A drive control: This controls the drive by supplying it with a suitable electrical current.
    Anspruchsgemsss the Geràtest control is configured to act on the drive with a heating current in the idle state of the cooling air damper and to heat him so. This reduces the risk of icing in the area of the drive and any components that are thermally connected to the drive, or any existing icing can be thawed out.
    In particular, the drive control is configured to apply at least one drive coil of the drive with the heating current, without moving the drive.
    Advantageously, the drive is a stepper motor, since stepper motors can be acted upon particularly easily with a heating current, without resulting in a motor movement.
    Next, a self-locking gear is arranged between the drive and the cooling air flap. A "self-locking" transmission is to be understood as meaning such a transmission in which it is not possible to move the drive to the cooling-air flap by applying a force, at least in the context of the forces normally occurring at the cooling-air flap. In other words, a transmission is self-locking if it can be driven via the drive shaft, but not via the output shaft.
    Preferably, with the heating current, a holding torque is generated in the drive, which exceeds the torque generated by the drive by gravity and the cooling air flow through the cooling air damper by at least two times, in particular by at least ten times. In other words, the drive is charged with much greater current than would be required to hold the cooling air damper.
    In a further embodiment, the gear is at least partially made of a good thermally conductive material, in particular with a thermal conductivity of at least 1 W / m · K, in particular at least 5 W / m · K, in particular at least 10 W / m · K, especially made of metal, to conduct the heat of the drive well. Advantageously, at least two toothed wheels made of such a material, to forward the heat to at least a portion of the cooling air damper and also to heat them.
    Advantageously, the device control is designed so that in at least one operating mode of the device with the heating current at the drive a temperature of at least 0 ° C continuously or at least temporarily maintained (eg in a defrosting phase), in particular a temperature of at least 1 ° C in particular at least 2 ° C. This can take place by the heating current being dimensioned so large that the temperature is sufficiently high under all expected operating conditions. It is also conceivable to carry out a temperature measurement in the region of the drive and to control the heating current in such a way that the temperature remains sufficiently high.
    In a further preferred embodiment, the Geràtest control is designed so that in at least one operating mode of the device with the heating current to the cooling air flap temperature of at least 0 ° C continuously or at least temporarily maintained (eg in a defrosting phase), in particular one Temperature of at least 1 ° C. In this way, ice formation on the cooling air flap can be prevented or ice formed there can be defrosted.
    Advantageously, the invention finds application in a Kühlgerât with at least two cooling compartments. In this case, the cooling air flap is arranged so that with her the Kühlluftstrôm can be deflected between the two cooling compartments, i. that it can be selectively directed into one or the other cooling compartment. The two cooling compartments have different set temperatures, i. the controller is designed to keep the refrigerated compartments at different temperatures. In this case, relatively large temperature gradients are present in the area of the cooling-air flap, which can lead to condensation and possibly ice formation. By the invention, this problem can be at least partially defused.
    BRIEF DESCRIPTION OF THE DRAWINGS Further embodiments, advantages and applications of the invention will become apparent from the dependent claims and from the following description with reference to the figures. Showing:
    1 shows a section through a Kühlgerât with two cooling compartments,
    2 is an enlarged sectional view through the cooling unit in the region of the cooling air damper,
    3 is a first three-dimensional view of the cooling unit in the region of the cooling air flap,
    4 shows a second three-dimensional view of the cooling unit in the region of the cooling air flap, and FIG. 5 shows a block diagram of the control and the drive of the cooling air flap.
    Modes for Carrying Out the Invention Cooling Apparatus: Figures 1 and 2 show one possible embodiment of a refrigerating appliance, e.g. from CH 711 098 is known. It has a housing 1 with a user door 2, via which the user has access to two cooling compartments 3, 4.
    The first cooling compartment 3 serves, for example, for storing food at temperatures above 0 ° C, in particular in a range between 0.5 ° C and 10 ° C. The second cooling compartment 4 serves, for example, for storing food at temperatures below 0 ° C., in particular between -10 ° C. and -30 ° C.
    In the embodiment shown, a two-part cooling unit 5 is provided with a first part 5a and a second part 5b. The first part 5a comprises the evaporator 6 and the second part 5b comprises the condenser 7 and the compressor 8 of a heat pump. However, it is also conceivable that these components are combined into a common unit and, for example, are arranged between the two cooling compartments 3, 4 or below or above them.
    As best seen in Fig. 2, the cooling device has a fan 9, with which a cooling air flow 14 between the cooling unit 5 and the rest of the device, in particular the cooling compartments 3, 4 can be circulated so as to cool the device ,
    For controlling the cooling air flow 14, a cooling air flap 10 is provided. In the present embodiment, with this the cooling air flow 14 between two channels 11, 12 are switched, one of which leads into the first cooling compartment 3 and the other in the second cooling compartment 4.
    Depending on which of the cooling compartments requires cooling 3.4, the cooling air flap 10 can be brought into its oberteil shown in Fig. 2 position, in which the cooling air 14 is passed into the second cooling compartment 4, or in a lower position (see Fig. 3, 4), in which the cooling air 14 is passed into the first cooling compartment 3.
    As is apparent from FIGS. 3 and 4, a drive 16 is provided for moving the cooling air flap, which comprises a stepping motor 17 in the present embodiment. The drive 16 is connected via a gear 18 to the cooling air flap 10.
    As already mentioned, the advantage of the transmission 18 is a self-locking transmission, in particular a reduction gear.
    Flap Control: Fig. 5 shows an embodiment of the components used to drive the cooling air damper 10.
    These include a device controller 20 which controls not only the cooling air damper 10 but the entire unit. It comprises e.g. a microprocessor 21 as well as other components, e.g. Memory and interface circuits to sensors and actuators, as they are known in the art.
    The device control 20 controls in particular the operation of the cooling unit 5 such that the desired setpoint temperatures are maintained in the cooling compartments 3, 4.
    Among other things, the device control 20 also controls the cooling air flap 10.
    For this purpose, it advantageously has a motor driver 22, which generates the currents for the drive coils 23 of the drive 16 and the stepping motor 17.
    In particular, the device controller 20 is configured to generate, via the motor driver 22, the current pulses with which the stepping motor 17 can be moved back and forth between its positions.
    Further, the device controller 20 is also configured to send a heating current through, the drive 16, with which the drive 16 is not moved, but is heated.
    In the case of a stepper motor, the heating current may be e.g. to act a holding current that is strong enough to ensure in the area of the drive 16 a desired temperature resp. to reach.
    Operation: When the cooling air damper 10 is at rest, it is heated with the heating current. This prevents or reduces the formation of condensation and possibly icing in the region of the drive 16 and the components thermally connected thereto.
    Advantageously, the cooling air flap 10 is thermally coupled to the drive 16, so that these can be at least partially heated via the heating current. This is particularly important when the cooling air damper 10 is brought to very low temperature as part of the cooling of the cold of the two cooling compartments 3, 4 and then the cooling is switched to cool the warmer of the two cooling compartments 3, 4. In this case, without heating current, the cooling air flap 10 would be relatively cold, and condensation and possibly icing could occur.
    The thermal coupling of the cooling air flap 10 to the drive 16 is advantageously carried out via the transmission 18, e.g. by being at least partially made of metal. In particular, the gears 25 of the transmission may be metal.
    Alternatively or in addition thereto, the thermal coupling can also take place via the housing of the transmission 18.
    The loading of the drive 10 by the GeraTeuerung 20 can take place at rest of the cooling air flap permanently. However, it is also conceivable that the controller only uses the heating current if it determines that there is heating demand. There are various possibilities for this, for example: A) The device controller 20 can supply the control 20 with heating current depending on the respective operating state of the cooling device. For example, it may make the heating current dependent on at least one of the actual temperatures and / or set temperatures of the refrigerated compartments 3, 4, e.g. by using a heating current only if one of these temperatures is below 0 ° C. A1) In particular, device controller 20 may control the drive, e.g. then act on heating current when it has the operating state changed or changed so that the temperature of the cooling air flow in the region of the cooling air flap 10 increases, since in this case condensation and icing occur more. In particular, in this case, it can drive e.g. then not act on heating current, or act on a lower heating current when it has changed the operating state to the effect that the temperature of the cooling air flow in the region of the cooling air damper 10 decreases. A2) Also, the device controller 20 may be e.g. in a conventional manner have a defrost mode to defrost ice in Gérât, especially in the cooling unit 5. During this de-icing mode, the evaporator generates 6 temperatures above 0 ° C. The control unit 20 should be designed to send the heating current in de-icing mode through the drive 16 in order to defrost all possible ice in the area of the flap. B) A temperature sensor 24 may be provided in the region of the drive 16 and / or the cooling air flap 10, and the device controller 20 is configured to select the heating current as a function of the temperature of the temperature sensor 24.
    In particular, the device controller 20 may be configured to select the heating current such that the temperature in the region of the drive 16 and or the cooling air flap 10 does not fall below a certain threshold of e.g. 0 ° C, in particular 1 ° C, falls.
    The device controller 20 may also be configured such that the user can suppress the use of the heating current, e.g. in a particularly energy-saving operating mode.
    Advantageously, the device controller 20 has two modes of operation. In a first mode of operation (in which no heating of the drive 16 is required), it does not transmit heating current through the cooling air damper 10 while the cooling air damper 10 is at rest, while the control unit 20 is in a second mode of operation (in which heating of the drive 16 is required) Rest of the cooling air flap, the heating current at least temporarily, in particular continuously, through the cooling air flap 10 sends. (By "operating modes" are meant those which the device assumes when cooling the refrigerated goods, i.e. the switched-off state is not an "operating mode" in this sense.) Examples of operating modes are e.g. - cooling only the cooling compartment 3; - cooling only the refrigerator compartment 4; - Cooling of both cooling compartments 3, 4; - no cooling, but defrosting one or more refrigerated compartments; and - no cooling, since the setpoint temperatures are reached or fallen below. (The number of operating modes depends, for example, on the number of refrigerated compartments).
    Comments As described, preferably the combination of a stepping motor 17 as a drive and a self-locking gear 18 is used. Although in this case, a holding current in the stepping motor 17 is not required, it is applied at rest with the heating current to heat it.
    Instead of the stepping motor, another electric motor may also be used as the drive 16. This can also be operated with a heating current. For example, at least one of its drive coils can be traversed by a current which is not suitable for moving the motor, or a combination of coils can be flowed through in such a way that no torque is generated in the motor.
    For example, it is an AC motor, in particular a synchronous motor or an asynchronous motor, which is acted upon by a direct current for heating, or of a current having a frequency which is so high that an engine movement is omitted.
    Or it is a DC motor, and the heating current is an alternating current, which does not lead to a motor movement.
    It is also conceivable that a separate heating resistor for heating the engine is present in the engine.
    The heat of the drive 16 can also be used elsewhere in the Kühlgerât. For this, e.g. a heat bridge 26 in the form of a metal part, which is connected to a device component 27 to be heated, cf. FIG. 5. The device component heated in this way can in particular be a wall region of a cooling air channel.
    In the above example, a refrigerator is shown with two refrigerated compartments held at different temperatures. However, the invention can also be used in refrigerators whose cooling compartments are at the same temperature. Further, three or more refrigerated compartments may also be provided, or only one refrigerated compartment.
    The cooling air damper can be used to switch the cooling air between cooling compartments, but also to control the amount of cooling air for only one compartment.
    While preferred embodiments of the invention are described in the present application, it should be clearly understood that the invention is not limited to these and may be practiced otherwise within the scope of the following claims.
    1. Kühlgerât with a cooling unit (5), a cooling air flap (10) for switching a cooling air flow (14) in the Kühlgerât, a drive (16) for moving the cooling air flap (10) and a GeraTeuerung (20) for driving the drive (16 ), characterized in that the Gera control (20) is adapted to act in a quiescent state of the cooling air flap (10) the drive (16) with a heating current to heat the drive (16). 2. Kühlgerât according to claim 1, wherein the drive (16) is a stepping motor (17). 3. Kühlgerât according to one of the preceding claims, wherein the Gera control is configured to at least one drive coil (23) of the drive (16) to act on the heating current without moving the drive (16). 4. Kühlgerât according to one of the claims, wherein between the drive (16) and the cooling air flap (10), a transmission (18) is arranged. 5. Kühlgerât according to claim 4, wherein the transmission (18) is self-locking. 6. Kühlgerât according to one of claims 4 or 5, wherein the gear (18) at least partially made of a material having a thermal conductivity of at least 1 W / m · K, in particular at least 5 W / m · K, in particular at least 10 W / m · K, in particular of metal, and in particular wherein the gear (18) Zahnrâder (25) and all Zahnrâder (25) are made of such a material. 7. Kühlgerât according to one of the preceding claims, wherein the heating current, a holding torque in the drive (16) can be generated which exceeds a by gravity and the cooling air flow (14) via the cooling air flap (10) producible torque by at least two times.
    权利要求:
    Claims (12)
    [1]
    - no cooling, but defrosting one or more refrigerated compartments; and - no cooling, since the setpoint temperatures are reached or fallen below. (The number of operating modes depends, for example, on the number of refrigerated compartments.) As described, the combination of a stepping motor 17 as a drive and a self-locking transmission 18 is preferably used. Although in this case, a holding current in the stepping motor 17 is not required, it is applied at rest with the heating current to heat it. Instead of the stepping motor, another electric motor may also be used as the drive 16. This can also be operated with a heating current. For example, at least one of its drive coils can be traversed by a current which is not suitable for moving the motor, or a combination of coils can be flowed through in such a way that no torque is generated in the motor. For example, it is an AC motor, in particular a synchronous motor or an asynchronous motor, which is acted upon by a direct current for heating, or of a current having a frequency which is so high that an engine movement is omitted. Or it is a DC motor, and the heating current is an alternating current, which does not lead to a motor movement. It is also conceivable that a separate heating resistor for heating the engine is present in the engine. The heat of the drive 16 can also be used elsewhere in the Kühlgerât. For this, e.g. a heat bridge 26 in the form of a metal part, which is connected to a device component 27 to be heated, cf. FIG. 5. The device component heated in this way can in particular be a wall region of a cooling air channel. In the above example, a refrigerator is shown with two refrigerated compartments held at different temperatures. However, the invention can also be used in refrigerators whose cooling compartments are at the same temperature. Further, three or more refrigerated compartments may also be provided, or only one refrigerated compartment. The cooling air damper can be used to switch the cooling air between cooling compartments, but also to control the amount of cooling air for only one compartment. While preferred embodiments of the invention are described in the present application, it should be clearly understood that the invention is not limited to these and may be practiced otherwise within the scope of the following claims. claims
    A refrigerator comprising a cooling unit (5), a cooling air flap (10) for switching a cooling air flow (14) in the cooling unit, a drive (16) for moving the cooling air flap (10) and a control unit (20) for activating the drive (16). , characterized in that the Gera control (20) is configured to act in a quiescent state of the cooling air flap (10) the drive (16) with a heating current to heat the drive (16).
    [2]
    2. Kühlgerât according to claim 1, wherein the drive (16) is a stepping motor (17).
    [3]
    3. Kühlgerât according to one of the preceding claims, wherein the Gera control is configured to at least one drive coil (23) of the drive (16) to act on the heating current without moving the drive (16).
    [4]
    4. Kühlgerât according to one of the claims, wherein between the drive (16) and the cooling air flap (10), a transmission (18) is arranged.
    [5]
    5. Kühlgerât according to claim 4, wherein the transmission (18) is self-locking.
    [6]
    6. Kühlgerât according to one of claims 4 or 5, wherein the gear (18) at least partially made of a material having a thermal conductivity of at least 1 W / m · K, in particular at least 5 W / m · K, in particular at least 10 W / m · K, in particular of metal, and in particular wherein the gear (18) Zahnrâder (25) and all Zahnrâder (25) are made of such a material.
    [7]
    7. Kühlgerât according to one of the preceding claims, wherein the heating current, a holding torque in the drive (16) can be generated which exceeds a by gravity and the cooling air flow (14) via the cooling air flap (10) producible torque by at least two times.
    [8]
    8. Kühlgerât according to one of the preceding claims, wherein the Gera control (20) is adapted to at least one operating mode with the heating current at the drive (16) to maintain a temperature of at least 0 ° C continuously or at least temporarily, in particular of at least 1 ° C, in particular of at least 2 ° C.
    [9]
    9. Kühlgerât according to one of the preceding claims, wherein the Gera control (20) is adapted to maintain in at least one operating mode with the heating current to the cooling air damper (10) a temperature of at least 0 ° C continuously or at least temporarily, in particular of at least 1 ° C.
    [10]
    10. Kühlgerât according to one of the preceding claims, wherein the Kühlgerât at least two cooling compartments (3, 4) having different set temperatures, wherein the cooling air flow (14) with the cooling air flap (10) between the two cooling compartments (3,4) is deflected, and in particular, wherein the controller is configured to maintain a temperature below 0 ° C in a first of the cooling compartments (3, 4) and a temperature above 0 ° C in a second of the refrigerated compartments (3, 4).
    [11]
    A refrigerator as claimed in any one of the preceding claims, wherein the appliance controller (20) sends two modes of operation, not sending heating current through the drive (16) while the cooling air damper (10) is at rest in a first mode of operation, while in a second mode of operation at rest Cooling air flap, the heating current at least temporarily, in particular continuously, by the drive (16) sends.
    [12]
    12. A method for operating a cooling device according to any one of the preceding claims, wherein the heating current at the drive (16) and / or on the cooling air flap (10) a temperature of at least 0 ° C is maintained permanently, in particular of at least 1 ° C.
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    同族专利:
    公开号 | 公开日
    CH713694B1|2022-01-31|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    CH00890/18A|CH713694B1|2018-07-18|2018-07-18|Cooling device with cooling air flap and heated drive for the cooling air flap.|CH00890/18A| CH713694B1|2018-07-18|2018-07-18|Cooling device with cooling air flap and heated drive for the cooling air flap.|
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