CN109425177B - Control method and device for heater of refrigerator with turnover beam and refrigerator - Google Patents

Control method and device for heater of refrigerator with turnover beam and refrigerator Download PDF

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Publication number
CN109425177B
CN109425177B CN201710766379.0A CN201710766379A CN109425177B CN 109425177 B CN109425177 B CN 109425177B CN 201710766379 A CN201710766379 A CN 201710766379A CN 109425177 B CN109425177 B CN 109425177B
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China
Prior art keywords
refrigerator
turnover
heater
temperature
power
Prior art date
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Application number
CN201710766379.0A
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Chinese (zh)
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CN109425177A (en
Inventor
姚龙
阚爱梅
武继荣
祝云飞
张志�
王君
董超
刘海燕
郭思志
方向
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hefei Hualing Co Ltd
Midea Group Co Ltd
Hefei Midea Refrigerator Co Ltd
Original Assignee
Hefei Hualing Co Ltd
Midea Group Co Ltd
Hefei Midea Refrigerator Co Ltd
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Application filed by Hefei Hualing Co Ltd, Midea Group Co Ltd, Hefei Midea Refrigerator Co Ltd filed Critical Hefei Hualing Co Ltd
Priority to CN201710766379.0A priority Critical patent/CN109425177B/en
Publication of CN109425177A publication Critical patent/CN109425177A/en
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Publication of CN109425177B publication Critical patent/CN109425177B/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D21/00Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/06Removing frost
    • F25D21/08Removing frost by electric heating
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D29/00Arrangement or mounting of control or safety devices
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2700/00Means for sensing or measuring; Sensors therefor
    • F25D2700/12Sensors measuring the inside temperature

Abstract

The embodiment of the invention provides a control method of a heater of a refrigerator with a turnover beam, belonging to the field of household appliances. The heater is used for heating the overturning beam, and the control method comprises the following steps: detecting an ambient temperature T1 of the refrigerator and an ambient humidity H of the refrigerator; determining a first power Q of the heater according to the ambient temperature T1 of the refrigerator, the surface temperature T2 of the turnover beam, the surface area S of the turnover beam, the ambient humidity H of the refrigerator and the specific heat capacity C of water, wherein the surface temperature T2 of the turnover beam is the sum of a preset temperature and a set temperature of a compartment in which the turnover beam is located; controlling the heater to operate at the first power. The control method and the control device for the heater of the refrigerator with the turnover beam and the refrigerator can enable the heater to continuously work as required, the temperature of the turnover beam is stable, and meanwhile, the factor of opening the door of the refrigerator is considered, so that the anti-condensation effect is better.

Description

Control method and device for heater of refrigerator with turnover beam and refrigerator
Technical Field
The invention relates to a household appliance, in particular to a control method and device for a heater of a refrigerator with a turnover beam and the refrigerator.
Background
For the refrigerator with the turnover beam, in order to achieve the effect of preventing condensation, the heater is used for heating the turnover beam. In the prior art, heating is performed according to a fixed period and with average power calculated by the on-off time ratio. With such a heating method, the temperature of the turnover beam is high during the operation of the heater, and the temperature of the turnover beam is low when the heater stops, i.e. the actual temperature of the turnover beam is wavy. In addition, when the refrigerator is opened and after the refrigerator is closed, the heating power is not adjusted for a certain time, and the anti-condensation effect is poor.
Disclosure of Invention
The embodiment of the invention aims to provide a method and a device for controlling a heater of a refrigerator with a turning beam and the refrigerator.
In order to achieve the above object, an embodiment of the present invention provides a method for controlling a heater of a refrigerator with an overturning beam, the heater being used for heating the overturning beam, the method comprising: detecting an ambient temperature T1 of the refrigerator and an ambient humidity H of the refrigerator; determining a first power Q of the heater according to the ambient temperature T1 of the refrigerator, the surface temperature T2 of the turnover beam, the surface area S of the turnover beam, the ambient humidity H of the refrigerator and the specific heat capacity C of water, wherein the surface temperature T2 of the turnover beam is the sum of a preset temperature and a set temperature of a compartment in which the turnover beam is located; controlling the heater to operate at the first power.
Preferably, after determining the first power Q of the heater, the method further comprises: judging whether the refrigerator performs an over-opening door action or not; and under the condition that the refrigerator performs an over-opening door action, controlling the heater to operate at a second power within a preset time after the refrigerator is opened and closed, wherein the second power is the sum of the first power Q and a preset power.
Preferably, after the determining whether the refrigerator performs the over-door opening operation, the control method further includes: and under the condition that the refrigerator performs an over-opening action, when the time for performing a door closing action after the refrigerator opens is longer than the preset time, controlling the heater to operate at the first power Q.
Preferably, the determining the first power Q of the heater according to the ambient temperature T1 of the refrigerator, the surface temperature T2 of the turnover beam, the surface area S of the turnover beam, the ambient humidity H of the refrigerator, and the specific heat capacity C of water comprises: calculating the condensation water amount M of the turnover beam according to the surface area S of the turnover beam and the environment humidity H of the refrigerator; and determining the first power Q of the heater according to the ambient temperature T1 of the refrigerator, the surface temperature T2 of the turnover beam, the condensed water quantity M of the turnover beam and the specific heat capacity C of water.
Preferably, the condensed water amount M of the turnover beam is calculated by the following formula, wherein M is H × S, H is the ambient humidity of the refrigerator, and S is the surface area of the turnover beam.
Preferably, the first power Q of the heater is calculated by the formula Q ═ C × M × (T1-T2), where T1 is the ambient temperature of the refrigerator, T2 is the surface temperature of the inversion beam, M is the amount of condensed water of the inversion beam, and C is the specific heat capacity of water.
The embodiment of the invention also provides a control device of a heater of a refrigerator with the turnover beam, wherein the heater is used for heating the turnover beam, and the control device comprises: the refrigerator comprises a temperature sensor, a humidity sensor and a controller, wherein the temperature sensor is used for detecting the ambient temperature T1 of the refrigerator; the humidity sensor is used for detecting the ambient humidity H of the refrigerator; the controller is used for determining a first power Q of the heater according to the ambient temperature T1 of the refrigerator, the surface temperature T2 of the turnover beam, the surface area S of the turnover beam, the ambient humidity H of the refrigerator and the specific heat capacity C of water, wherein the surface temperature T2 of the turnover beam is the sum of a preset temperature and a set temperature of a compartment in which the turnover beam is located; and controlling the heater to operate at the first power.
Preferably, the controller is further configured to: judging whether the refrigerator performs an over-opening door action or not; and under the condition that the refrigerator performs an over-opening door action, controlling the heater to operate at a second power within a preset time after the refrigerator is opened and closed, wherein the second power is the sum of the first power Q and a preset power.
Preferably, the controller is further configured to: and under the condition that the refrigerator performs an over-opening action, when the time for performing a door closing action after the refrigerator opens is longer than the preset time, controlling the heater to operate at the first power Q.
Preferably, the controller is further configured to: calculating the condensation water amount M of the turnover beam according to the surface area S of the turnover beam and the environment humidity H of the refrigerator; and determining the first power Q of the heater according to the ambient temperature T1 of the refrigerator, the surface temperature T2 of the turnover beam, the condensed water quantity M of the turnover beam and the specific heat capacity C of water.
The embodiment of the invention also provides a refrigerator which comprises the control device of the heater of the refrigerator with the turnover beam.
By the technical scheme, the invention provides a control method and a device for a heater of a refrigerator with a turnover beam and the refrigerator, wherein the control method comprises the following steps: detecting an ambient temperature T1 of the refrigerator and an ambient humidity H of the refrigerator; determining a first power Q of the heater according to the ambient temperature T1 of the refrigerator, the surface temperature T2 of the turnover beam, the surface area S of the turnover beam, the ambient humidity H of the refrigerator and the specific heat capacity C of water, wherein the surface temperature T2 of the turnover beam is the sum of a preset temperature and a set temperature of a compartment in which the turnover beam is located; controlling the heater to operate at the first power. And judging whether the door is opened or not, and controlling the power of the heater according to the door opening or closing time. Through calculating the operating power that the heater needs, can make the heater continuous operation as required, upset roof beam temperature is stable, considers the factor that the refrigerator opened the door simultaneously, and it is better to prevent the condensation effect.
Additional features and advantages of embodiments of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the embodiments of the invention without limiting the embodiments of the invention. In the drawings:
fig. 1 is a flowchart of a method for controlling a heater of a refrigerator having a turning beam according to an embodiment of the present invention;
fig. 2 is a flowchart of a method for controlling a heater of a refrigerator having a turnover beam according to another embodiment of the present invention;
fig. 3 is a flowchart of a method for controlling a heater of a refrigerator having a turnover beam according to another embodiment of the present invention; and
fig. 4 is a schematic structural diagram of a control device of a heater of a refrigerator with a turning beam according to an embodiment of the present invention.
Description of the reference numerals
1 temperature sensor 2 humidity sensor
And 3, a controller.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating embodiments of the invention, are given by way of illustration and explanation only, not limitation.
Fig. 1 is a flowchart of a method for controlling a heater of a refrigerator having a turning beam according to an embodiment of the present invention. As shown in fig. 1, an embodiment of the present invention provides a method for controlling a heater of a refrigerator with an overturning beam, where the heater is used for heating the overturning beam, and the method includes: detecting an ambient temperature T1 of the refrigerator and an ambient humidity H of the refrigerator (step S11); determining a first power Q of the heater according to an ambient temperature T1 of the refrigerator, a surface temperature T2 of the turnover beam, a surface area S of the turnover beam, an ambient humidity H of the refrigerator and a specific heat capacity C of water, wherein the surface temperature T2 of the turnover beam is the sum of a preset temperature and a set temperature of a compartment in which the turnover beam is located (step S12); controlling the heater to operate at the first power (step S13).
The turnover beam can be located in various compartments of the refrigerator, such as a freezer compartment and a refrigerator compartment, the set temperatures of the compartments being different for the different compartments. In this embodiment, for a refrigerator, the preset temperature is considered to be constant at other times, except when the door of the refrigerator is opened or when the preset temperature is 0 for a preset time after the door is closed (i.e., when the set temperature of the time chamber is equal to the surface temperature of the turnover beam). For the preset temperature used for calculating the first power in this embodiment, the condition of opening and closing the gate is not considered for the moment, and the power change affected by opening and closing the gate will be described below.
In addition, controlling the heater to operate at the first power as described above is a case where the heater power is entirely converted into heat, and after calculating the first power, the first power may be divided by the conversion efficiency, as considering the power of the heater and the heat conversion efficiency, to obtain the final power for controlling the operation of the heater in consideration of the conversion efficiency.
Fig. 2 is a flowchart of a method for controlling a heater of a refrigerator having a turnover beam according to another embodiment of the present invention. As shown in fig. 2, a method for controlling a heater of a refrigerator with an overturning beam, the heater being used for heating the overturning beam, comprises: detecting an ambient temperature T1 of the refrigerator and an ambient humidity H of the refrigerator (step S21); calculating the amount M of condensed water of the turnover beam according to the surface area S of the turnover beam and the environment humidity H of the refrigerator (step S22); determining a first power Q of the heater according to an ambient temperature T1 of the refrigerator, a surface temperature T2 of the turnover beam, a condensed water amount M of the turnover beam and a specific heat capacity C of water, wherein the surface temperature T2 of the turnover beam is the sum of a preset temperature and a set temperature of a compartment in which the turnover beam is located (step S23); controlling the heater to operate at the first power (step S24).
When the ambient temperature T1 of the refrigerator is higher than the surface temperature T2 of the turnover beam, water vapor is condensed when encountering the turnover beam, and at the moment, the heater is adopted to compensate heat for the turnover beam, so that the surface temperature of the turnover beam is higher than the ambient temperature; calculating the first power Q of the heater, wherein the logic is as follows:
and calculating the condensed water quantity M of the turnover beam by the following formula, wherein M is H × S, H is the ambient humidity of the refrigerator, S is the surface area of the turnover beam, and the first power Q of the heater is calculated by the following formula, wherein Q is C × M × (T1-T2), T1 is the ambient temperature of the refrigerator, T2 is the surface temperature of the turnover beam, M is the condensed water quantity of the turnover beam, and C is the specific heat capacity of water.
Fig. 3 is a flowchart of a method for controlling a heater of a refrigerator having a turning beam according to another embodiment of the present invention. As shown in fig. 3, a method for controlling a heater of a refrigerator with an overturning beam, the heater being used for heating the overturning beam, comprises: detecting an ambient temperature T1 of the refrigerator and an ambient humidity H of the refrigerator (step S31); determining a first power Q of the heater according to an ambient temperature T1 of the refrigerator, a surface temperature T2 of the turnover beam, a surface area S of the turnover beam, an ambient humidity H of the refrigerator and a specific heat capacity C of water, wherein the surface temperature T2 of the turnover beam is the sum of a preset temperature and a set temperature of a compartment in which the turnover beam is located (step S32); judging whether the refrigerator performs an over-opening operation (step S33); judging whether a door of the refrigerator is in an open state or not when the refrigerator performs an over-door operation (step S34); when the door of the refrigerator is not in the open state, judging whether the time for performing the door closing action after the door of the refrigerator is opened is more than the preset time or not (step S35); controlling the heater to operate at the first power in a case where the refrigerator does not perform an over-door opening motion or when a time for performing a door closing motion after the refrigerator is opened is greater than the predetermined time (step S36); controlling the heater to operate at a second power when the door of the refrigerator is in an open state and the time for closing the door after the door of the refrigerator is opened is less than or equal to a predetermined time, wherein the second power is the sum of the first power and a preset power (step S37);
in this embodiment, after the first power is calculated, it can be determined whether the refrigerator performs the door opening operation. If the door is opened, judging whether the door of the refrigerator is in an open state; controlling the heater to operate at a second power when the door of the refrigerator is in an open state; when the door of the refrigerator is not in an open state, judging whether the time for closing the door after the door of the refrigerator is opened is more than preset time or not; when the time for closing the door after the door of the refrigerator is opened is less than or equal to the preset time, controlling the heater to operate at the second power, namely controlling the time period for the heater to operate at the second power to be within the preset time from the door opening of the refrigerator to the door closing of the refrigerator; when the time of closing the door after the door of the refrigerator is opened is longer than the preset time, controlling the heater to operate at a first power; in case that the refrigerator does not perform the door opening motion, the heater is controlled to be operated at the first power as well.
This embodiment can play better more comprehensive condensation effect of preventing to the upset roof beam through the influence of the factor of considering the switch door of refrigerator.
Fig. 4 is a schematic structural diagram of a control device of a heater of a refrigerator with a turning beam according to an embodiment of the present invention. As shown in fig. 4, an embodiment of the present invention further provides a control apparatus for a heater of a refrigerator with an overturning beam, where the heater is used to heat the overturning beam, and the control apparatus includes: the refrigerator comprises a temperature sensor 1, a humidity sensor 2 and a controller 3, wherein the temperature sensor 1 is used for detecting the ambient temperature T1 of the refrigerator; the humidity sensor 2 is used for detecting the ambient humidity H of the refrigerator; the controller 3 is used for determining a first power Q of the heater according to an ambient temperature T1 of the refrigerator, a surface temperature T2 of the turnover beam, a surface area S of the turnover beam, ambient humidity H of the refrigerator and a specific heat capacity C of water, wherein the surface temperature T2 of the turnover beam is the sum of a preset temperature and a set temperature of a compartment in which the turnover beam is located; and controlling the heater to operate at the first power.
Preferably, the controller 3 is further configured to: judging whether the refrigerator performs an over-opening door action or not; and under the condition that the refrigerator performs an over-opening door action, when the time for performing a door closing action after the refrigerator is opened or the distance from the refrigerator to the door is less than or equal to a preset time, controlling the heater to operate at a second power, wherein the second power is the sum of the first power and a preset power.
Preferably, the controller 3 is further configured to: and under the condition that the refrigerator performs an over-opening action, when the time for performing a door closing action after the refrigerator opens is longer than the preset time, controlling the heater to operate at the first power.
Preferably, the controller 3 is further configured to: and controlling the heater to operate at the first power when the refrigerator does not perform an over-opening door action.
Preferably, the controller 3 is further configured to: calculating the condensation water amount M of the turnover beam according to the surface area S of the turnover beam and the environment humidity H of the refrigerator; and determining the first power Q of the heater according to the ambient temperature T1 of the refrigerator, the surface temperature T2 of the turnover beam, the condensed water quantity M of the turnover beam and the specific heat capacity C of water.
The embodiment of the invention also provides a refrigerator which comprises the control device of the heater of the refrigerator with the turnover beam.
By adopting the technical scheme, the control method and the control device for the heater of the refrigerator with the turnover beam and the refrigerator provided by the invention can enable the heater to continuously work as required by calculating the running power required by the heater, the temperature of the turnover beam is stable, and meanwhile, the condensation prevention effect is better by considering the door opening factor of the refrigerator.
Although the embodiments of the present invention have been described in detail with reference to the accompanying drawings, the embodiments of the present invention are not limited to the details of the above embodiments, and various simple modifications can be made to the technical solutions of the embodiments of the present invention within the technical idea of the embodiments of the present invention, and the simple modifications all belong to the protection scope of the embodiments of the present invention.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, the embodiments of the present invention do not describe every possible combination.
Those skilled in the art will understand that all or part of the steps in the method according to the above embodiments may be implemented by a program, which is stored in a storage medium and includes several instructions to enable a single chip, a chip, or a processor (processor) to execute all or part of the steps in the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In addition, any combination of various different implementation manners of the embodiments of the present invention is also possible, and the embodiments of the present invention should be considered as disclosed in the embodiments of the present invention as long as the combination does not depart from the spirit of the embodiments of the present invention.

Claims (9)

1. A control method of a heater of a refrigerator with an overturning beam, the heater being used for heating the overturning beam, the control method comprising:
detecting an ambient temperature T1 of the refrigerator and an ambient humidity H of the refrigerator;
determining a first power Q of the heater according to the ambient temperature T1 of the refrigerator, the surface temperature T2 of the turnover beam, the surface area S of the turnover beam, the ambient humidity H of the refrigerator and the specific heat capacity C of water, wherein the surface temperature T2 of the turnover beam is the sum of a preset temperature and a set temperature of a compartment in which the turnover beam is located;
judging whether the refrigerator performs an over-opening door action or not;
and under the condition that the refrigerator performs an over-opening door action, controlling the heater to operate at a second power within a preset time after the refrigerator is opened and closed, wherein the second power is the sum of the first power Q and a preset power.
2. The method of claim 1, wherein after determining whether the refrigerator performs an over-opening operation, the method further comprises:
and under the condition that the refrigerator performs an over-opening action, when the time for performing a door closing action after the refrigerator opens is longer than the preset time, controlling the heater to operate at the first power Q.
3. The method of claim 1, wherein the determining the first power Q of the heater according to the ambient temperature T1 of the refrigerator, the surface temperature T2 of the turning beam, the surface area S of the turning beam, the ambient humidity H of the refrigerator, and the specific heat capacity C of water comprises:
calculating the condensation water amount M of the turnover beam according to the surface area S of the turnover beam and the environment humidity H of the refrigerator;
and determining the first power Q of the heater according to the ambient temperature T1 of the refrigerator, the surface temperature T2 of the turnover beam, the condensed water quantity M of the turnover beam and the specific heat capacity C of water.
4. The method of controlling the heater of the refrigerator with the turnover beam as set forth in claim 3, wherein the amount of the condensed water M of the turnover beam is calculated by the following formula:
and M is H × S, wherein H is the ambient humidity of the refrigerator, and S is the surface area of the turnover beam.
5. The method of claim 3, wherein the first power Q of the heater is calculated by the following equation:
q — C × M × (T1-T2), where T1 is the ambient temperature of the refrigerator, T2 is the surface temperature of the inversion beam, M is the amount of condensed water of the inversion beam, and C is the specific heat capacity of water.
6. A control device of a heater of a refrigerator with a turnover beam, the heater being used for heating the turnover beam, the control device comprising:
a temperature sensor, a humidity sensor, and a controller, wherein,
the temperature sensor is used for detecting the ambient temperature T1 of the refrigerator;
the humidity sensor is used for detecting the ambient humidity H of the refrigerator;
the controller is used for determining a first power Q of the heater according to the ambient temperature T1 of the refrigerator, the surface temperature T2 of the turnover beam, the surface area S of the turnover beam, the ambient humidity H of the refrigerator and the specific heat capacity C of water, wherein the surface temperature T2 of the turnover beam is the sum of a preset temperature and a set temperature of a compartment in which the turnover beam is located; judging whether the refrigerator performs an over-opening door action or not; and under the condition that the refrigerator performs an over-opening door action, controlling the heater to operate at a second power within a preset time after the refrigerator is opened and closed, wherein the second power is the sum of the first power Q and a preset power.
7. The control apparatus for the heater of the refrigerator with the turnover beam as set forth in claim 6, wherein the controller is further configured to:
and under the condition that the refrigerator performs an over-opening action, when the time for performing a door closing action after the refrigerator opens is longer than the preset time, controlling the heater to operate at the first power Q.
8. The control apparatus for the heater of the refrigerator with the turnover beam as set forth in claim 6, wherein the controller is further configured to:
calculating the condensation water amount M of the turnover beam according to the surface area S of the turnover beam and the environment humidity H of the refrigerator;
and determining the first power Q of the heater according to the ambient temperature T1 of the refrigerator, the surface temperature T2 of the turnover beam, the condensed water quantity M of the turnover beam and the specific heat capacity C of water.
9. A refrigerator characterized in that it comprises a control device for the heater of a refrigerator with a flip beam according to any one of claims 6 to 8.
CN201710766379.0A 2017-08-30 2017-08-30 Control method and device for heater of refrigerator with turnover beam and refrigerator Active CN109425177B (en)

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CN109990547A (en) * 2019-03-29 2019-07-09 长虹美菱股份有限公司 Refrigerator storage door flip beam segmented control method
CN110513959A (en) * 2019-08-30 2019-11-29 珠海格力节能环保制冷技术研究中心有限公司 Control circuit, the control method of flip beam heater and refrigerator
CN110595139A (en) * 2019-09-10 2019-12-20 合肥晶弘电器有限公司 Refrigerator overturning beam condensation prevention control method and device, control equipment and refrigerator

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CN102735010B (en) * 2012-07-11 2016-02-24 合肥美的电冰箱有限公司 Refrigeration plant
CN104006623A (en) * 2014-05-06 2014-08-27 合肥荣事达三洋电器股份有限公司 Anti-condensation control device for French hinged-door refrigerator and control method of anti-condensation control device for French hinged-door refrigerator
JP6641823B2 (en) * 2015-09-16 2020-02-05 富士電機株式会社 vending machine
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