WO2023134541A1 - 冷藏冷冻装置及其控制方法 - Google Patents

冷藏冷冻装置及其控制方法 Download PDF

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Publication number
WO2023134541A1
WO2023134541A1 PCT/CN2023/070735 CN2023070735W WO2023134541A1 WO 2023134541 A1 WO2023134541 A1 WO 2023134541A1 CN 2023070735 W CN2023070735 W CN 2023070735W WO 2023134541 A1 WO2023134541 A1 WO 2023134541A1
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Prior art keywords
compartment
freezing
temperature
refrigerating
evaporator
Prior art date
Application number
PCT/CN2023/070735
Other languages
English (en)
French (fr)
Inventor
崔展鹏
陈建全
姬立胜
李涛
Original Assignee
青岛海尔电冰箱有限公司
海尔智家股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Priority claimed from CN202210037963.3A external-priority patent/CN116481230A/zh
Priority claimed from CN202210038850.5A external-priority patent/CN116481231A/zh
Priority claimed from CN202210038853.9A external-priority patent/CN116481232A/zh
Application filed by 青岛海尔电冰箱有限公司, 海尔智家股份有限公司 filed Critical 青岛海尔电冰箱有限公司
Publication of WO2023134541A1 publication Critical patent/WO2023134541A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
    • F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D29/00—Arrangement or mounting of control or safety devices

Definitions

  • the invention relates to refrigeration and freezing technology, in particular to a refrigeration and freezing device and a control method thereof.
  • the level of humidity in the refrigerating and freezing device will affect the speed of moisture evaporation of the ingredients, thereby affecting the quality of the ingredients.
  • the humidity is too low, the water in the ingredients evaporates quickly, which will cause the weight loss of the ingredients, which in turn leads to problems such as poor food storage effect and short food preservation period. Therefore, moisturizing the refrigerated freezer is always a crucial research topic.
  • most of the current refrigerating and freezing devices humidify and moisturize the refrigerator compartment, and pay little attention to the problem of humidifying and moisturizing the freezer compartment.
  • air-cooled refrigerators and freezers generally have the problem of large humidity fluctuations during the freezing and cooling period. Humidity fluctuations and low humidity will cause the food stored in the freezer to lose water, which will affect the taste of the food. Cause the loss of nutrition and affect the user experience.
  • An object of the first aspect of the present invention is to overcome at least one defect of the prior art, and provide a control method of a refrigerating and freezing device capable of increasing the average humidity in a freezing compartment.
  • a further object of the first aspect of the invention is to be able to maintain a high level of humidity in the freezer compartment during shutdowns.
  • Another further object of the first aspect of the invention is to avoid a major influence on the temperature of the freezer compartment.
  • Yet a further object of the first aspect of the present invention is to simplify the control logic of the refrigerator-freezer.
  • the object of the second aspect of the present invention is to provide a refrigerator-freezer capable of increasing the average humidity inside the freezer compartment.
  • the present invention provides a control method of a refrigerating and freezing device, the refrigerating and freezing device includes a box body defining a freezing compartment, a freezing fan for driving air supply to the freezing compartment, and A compression refrigeration system comprising a compressor; said control method comprising:
  • a freezing compartment humidification operation is performed to increase the humidity in the freezing compartment to meet the preset condition before stopping the compressor and the refrigerating fan.
  • the compression refrigeration system further includes a refrigerating evaporator and a refrigerating throttling device connected in series with the compressor; after the humidification operation of the refrigerated compartment is performed to increase the humidity in the refrigerated compartment to meet the preset condition
  • the step of stopping described compressor and described refrigerating fan comprises:
  • At least one non-refrigerated compartment is further defined in the box, and at least one non-refrigerated branch circuit is connected in parallel at both ends of the refrigerated throttling device for respectively providing cooling capacity for the at least one non-refrigerated compartment.
  • the compression refrigeration system further includes a switch valve for connecting the refrigeration throttling device and one of the at least one non-refrigeration branch circuit;
  • the refrigerating and freezing device Before reaching the automatic shutdown condition, the refrigerating and freezing device is in the cooling state of the freezing compartment, and in the cooling state of the freezing compartment, the freezing fan is in the running state;
  • the step of controlling the flow of refrigerant through the refrigeration throttling device and the refrigeration evaporator includes:
  • At least one non-refrigerated compartment is further defined in the box, and at least one non-refrigerated branch circuit is connected in parallel at both ends of the refrigerated throttling device for respectively providing cooling capacity for the at least one non-refrigerated compartment.
  • the compression refrigeration system further includes a switch valve for connecting the refrigeration throttling device and one of the at least one non-refrigeration branch circuit;
  • the refrigerating and freezing device Before reaching the automatic shutdown condition, the refrigerating and freezing device is in the cooling state of the non-freezing compartment, and in the cooling state of the non-freezing compartment, the refrigeration fan is in a stopped state;
  • the step of controlling the flow of refrigerant through the refrigeration throttling device and the refrigeration evaporator includes:
  • the step of adjusting the operating frequency of the compressor until the temperature difference between the evaporator temperature of the refrigeration evaporator and the compartment temperature in the freezing compartment is greater than or equal to a preset minimum temperature difference includes:
  • the temperature difference between the evaporator temperature and the compartment temperature is less than the preset minimum temperature difference, reduce the operating frequency of the compressor, and return to continue obtaining the evaporator temperature and the The temperature of the compartment in the freezing compartment is increased until the temperature difference between the temperature of the evaporator and the temperature of the compartment is greater than or equal to the preset minimum temperature difference.
  • the step of stopping the compressor and the refrigerating fan after performing the humidification operation of the refrigerated compartment to increase the humidity in the refrigerated compartment to meet a preset condition includes:
  • the compressor and the freezer fan are controlled to stop running after increasing the humidity in the freezer compartment to the preset maximum humidity.
  • the compression refrigeration system further includes a refrigeration branch connected in series with the compressor, and the refrigeration branch includes a refrigeration evaporator and a refrigeration throttling device;
  • the refrigerating and freezing device Before reaching the automatic shutdown condition, the refrigerating and freezing device is in the cooling state of the freezing compartment, and in the cooling state of the freezing compartment, the freezing fan is in the running state;
  • the step of increasing the humidity in the freezer compartment to the preset maximum humidity includes:
  • At least one non-refrigerated compartment is defined in the box, and the compression refrigeration system further includes a refrigeration branch connected in series with the compressor, and the refrigeration branch includes a refrigeration evaporator and a refrigeration throttling device, at least one non-refrigerating branch circuit is connected in parallel at both ends of the freezing throttling device for providing cooling capacity for the at least one non-refrigerating compartment, and the compression refrigeration system also includes a circuit for conducting the freezing section flow device and a switching valve of one of the at least one non-refrigerated branch;
  • the refrigerating and freezing device Before reaching the automatic shutdown condition, the refrigerating and freezing device is in the cooling state of the non-freezing compartment, and in the cooling state of the non-freezing compartment, the refrigeration fan is in a stopped state;
  • the step of increasing the humidity in the freezer compartment to the preset maximum humidity includes:
  • the compressor is controlled to operate at a frequency lower than its first set frequency in the refrigerated compartment cooling state, so that the evaporator temperature of the refrigerated evaporator is higher than the compartment temperature in the refrigerated compartment.
  • the compressor is controlled to run at a frequency lower than its first set frequency in the cooling state of the freezing compartment, so that the evaporator temperature of the freezing evaporator is higher than that of the compartment in the freezing compartment.
  • the room temperature steps include:
  • the temperature difference between the evaporator temperature and the compartment temperature is greater than or equal to a preset minimum temperature difference, keep the operating frequency of the compressor unchanged, and return to continue obtaining the humidity in the freezing compartment;
  • the preset minimum temperature difference is greater than zero.
  • the preset maximum humidity is any relative humidity value ranging from 80% to 100%.
  • the compression refrigeration system further includes a refrigeration evaporator and a refrigeration throttling device connected in series with the compressor;
  • the step of performing the freezing compartment humidification operation to increase the humidity in the freezing compartment to meet a preset condition and then stopping the compressor and the freezing fan includes:
  • the preset frequency is 20-90 Hz lower than the first set frequency of the compressor in the cooling state of the freezing compartment.
  • At least one non-refrigerated compartment is further defined in the box, and at least one non-refrigerated branch circuit is connected in parallel at both ends of the refrigerated throttling device for respectively providing cooling capacity for the at least one non-refrigerated compartment.
  • the compression refrigeration system further includes a switch valve for connecting the refrigeration throttling device and one of the at least one non-refrigeration branch circuit;
  • the refrigerating and freezing device Before reaching the automatic shutdown condition, the refrigerating and freezing device is in the cooling state of the freezing compartment, and in the cooling state of the freezing compartment, the freezing fan is in the running state;
  • the step of controlling the flow of refrigerant through the refrigeration throttling device and the refrigeration evaporator includes:
  • the step of controlling described refrigerating fan to be in stop state comprises:
  • At least one non-refrigerated compartment is further defined in the box, and at least one non-refrigerated branch circuit is connected in parallel at both ends of the refrigerated throttling device for respectively providing cooling capacity for the at least one non-refrigerated compartment.
  • the compression refrigeration system further includes a switch valve for connecting the refrigeration throttling device and one of the at least one non-refrigeration branch circuit;
  • the refrigerating and freezing device Before reaching the automatic shutdown condition, the refrigerating and freezing device is in the cooling state of the non-freezing compartment, and in the cooling state of the non-freezing compartment, the refrigeration fan is in a stopped state;
  • the step of controlling the flow of refrigerant through the refrigeration throttling device and the refrigeration evaporator includes:
  • the step of controlling described refrigerating fan to be in stop state comprises:
  • the second preset duration is any duration value ranging from 1 to 10 minutes.
  • the operating frequency of the compressor is reduced by the same magnitude each time.
  • the operating frequency of the compressor is reduced by 2-20 Hz each time.
  • the preset minimum temperature difference is any temperature difference value ranging from 2°C to 4°C.
  • the first preset duration is any duration value ranging from 3 to 10 minutes.
  • the automatic shutdown condition is that the temperature of each storage compartment of the refrigerating and freezing device reaches its respective set temperature.
  • the present invention also provides a refrigerating and freezing device, including a box body defining a freezing compartment, a refrigeration fan for driving air supply to the freezing compartment, and a compression refrigeration system, the compression refrigeration system
  • the refrigerating system includes a compressor, a refrigerating evaporator and a refrigerating throttling device connected in series with the compressor, and the refrigerating and freezing device also includes:
  • the control device includes a processor and a memory, where a machine-executable program is stored in the memory, and when the machine-executable program is executed by the processor, it is used to implement the control method described in any of the above schemes.
  • At least one non-refrigerated compartment is further defined in the box, and at least one non-refrigerated branch circuit is connected in parallel at both ends of the refrigerated throttling device for respectively providing cooling capacity for the at least one non-refrigerated compartment.
  • the compression refrigeration system further includes a switch valve for connecting the refrigeration throttling device and one of the at least one non-refrigeration branch circuit;
  • the switching valve is configured to maintain or switch to the state of conducting the freezing throttling device under control when the refrigerating and freezing device reaches a preset automatic shutdown condition.
  • the control method of the present invention does not immediately stop the compressor when the refrigerating and freezing device reaches the preset automatic shutdown condition, but first performs the humidification operation of the freezing compartment to increase the humidity in the freezing compartment to meet the preset condition before shutting down. After shutting down, the humidity in the freezer does not drop any more, and even rises slowly, thereby increasing the average humidity in the freezer and avoiding the low humidity in the freezer that affects the food preservation effect.
  • control method of the present invention does not stop the compressor immediately when the refrigerating and freezing device reaches the preset automatic shutdown condition, but stops the refrigerating fan first, and makes the evaporator temperature of the refrigerating evaporator high by adjusting the operating frequency of the compressor Then stop the compressor and start the refrigeration fan, and the airflow will circulate between the refrigeration evaporator and the refrigeration compartment through the refrigeration fan.
  • the temperature of the evaporator of the refrigerated evaporator is higher than the temperature of the compartment in the refrigerated compartment at this time, the external water vapor entering the refrigerated compartment through the door seal, the moisture in the refrigerated compartment (such as the moisture volatilized by the food), and the refrigerated evaporator
  • the moisture formed by the sublimation of the condensed frost on the surface will condense in the freezing room with a lower temperature instead of condensing at the freezing evaporator, thereby effectively increasing the moisture content in the freezing room and increasing the humidity in the freezing room.
  • the humidity in the freezing room is increased before the shutdown of the refrigerating and freezing device, and then the shutdown is performed. After shutting down, the humidity in the freezer does not drop any more, and even rises slowly, thereby increasing the average humidity in the freezer and avoiding the low humidity in the freezer that affects the food preservation effect.
  • control method of the present invention does not immediately stop the compressor and the refrigeration fan when the refrigerating and freezing device reaches the preset automatic shutdown condition, but raises the humidity in the freezing room to the preset maximum humidity and then stops the compressor and the refrigerating machine. fan. That is to say, before the refrigerating and freezing device shuts down, the humidity in the freezer compartment is increased to the preset maximum humidity before shutting down. After shutting down, the humidity in the freezer room no longer drops, and even rises slowly. Thus, the humidity in the freezer room can be maintained at a higher level of the preset maximum humidity during the shutdown period, which avoids low humidity in the freezer room and Affect food preservation effect.
  • the present invention monitors the temperature difference between the evaporator temperature and the compartment temperature by acquiring the evaporator temperature of the freezing evaporator and the compartment temperature in the freezing compartment, and gradually and slowly reduces the operating frequency of the compressor, so that the freezing
  • the temperature of the evaporator of the evaporator is higher than the temperature of the compartment in the freezer, which can not only make the outside water vapor entering the freezer through the door seal, the moisture in the freezer (such as the moisture volatilized by the food), and the frost on the freezer evaporator sublime
  • the moisture in the freezer can be kept in the freezer to simply and effectively increase the humidity in the freezer, and it can also prevent the operating frequency of the compressor from being reduced too much at one time, which will cause the temperature rise of the freezer evaporator to be too high, which will greatly affect the temperature of the freezer. Influence.
  • control method of the present invention presets a lower preset frequency based on experience, and when the compressor operates at the preset frequency, the evaporator temperature of the refrigerated evaporator is higher than the compartment temperature in the refrigerated compartment.
  • the compressor is not stopped immediately, but the refrigerating fan is stopped first, and the compressor is run at the above-mentioned preset frequency for a second preset time before stopping the compressor.
  • the refrigerating The temperature of the evaporator has risen to at least higher than the temperature of the freezer compartment, and then the airflow is circulated between the freezer evaporator and the freezer compartment by starting the freezer fan.
  • the external water vapor entering the freezer compartment through the door seal The moisture in the freezing compartment (such as the moisture volatilized by the ingredients) and the moisture formed by the sublimation of the frost on the freezing evaporator will condense in the freezing compartment with a lower temperature instead of condensing at the freezing evaporator, thereby effectively Increase the moisture content in the freezer and increase the humidity in the freezer.
  • the humidity in the freezing room is increased before the shutdown of the refrigerating and freezing device, and then the shutdown is performed. After shutting down, the humidity in the freezer room will no longer drop, and even rise slowly. Therefore, the humidity in the freezer room can be maintained at a high level during the shutdown period, the average humidity in the freezer room can be increased, and the humidity in the freezer room can be avoided. Low and affect the food preservation effect.
  • the present invention presets a lower preset frequency based on experience, so that the running frequency of the compressor is constant during humidification, and only needs to monitor the duration of the compressor running at the preset frequency, which simplifies the control logic.
  • Fig. 1 is a schematic structural diagram of a refrigerating and freezing device according to one embodiment of the present invention
  • Fig. 2 is a schematic structural block diagram of a compression refrigeration system of a refrigerator-freezer according to an embodiment of the present invention
  • Fig. 3 is a schematic flowchart of a control method of a refrigerating and freezing device according to a specific embodiment of the present invention
  • Fig. 4 is a schematic flowchart of a control method of a refrigerating and freezing device according to another specific embodiment of the present invention.
  • Fig. 5 is a schematic flowchart of a control method of a refrigerating and freezing device according to a specific embodiment of the present invention
  • Fig. 6 is a schematic flowchart of increasing the humidity in the freezer compartment to a preset maximum humidity according to an embodiment of the present invention
  • Fig. 7 is a schematic flowchart of a control method of a refrigerating and freezing device according to another embodiment of the present invention.
  • Fig. 8 is a schematic flowchart of a control method of a refrigerating and freezing device according to yet another specific embodiment of the present invention.
  • Fig. 9 is a schematic structural block diagram of a refrigerating and freezing device according to an embodiment of the present invention.
  • FIG. 1 is a schematic structural diagram of a refrigerating and freezing device according to an embodiment of the present invention
  • FIG. 2 is a diagram of a compression refrigeration system of a refrigerating and freezing device according to an embodiment of the present invention. Schematic block diagram.
  • the refrigerating and freezing device 1 of the present invention includes a box body 10 defining a freezing compartment 11, a refrigeration fan 31 for driving air supply to the freezing compartment 11, and a compression refrigeration system comprising a compressor 21 20. Further, the compression refrigeration system 20 also includes a condenser 29 connected in series with the compressor 21 , a refrigeration evaporator 22 and a refrigeration throttling device 23 .
  • the freezing evaporator 22 and the freezing throttling device 23 form a freezing branch circuit.
  • the freezing throttling device 23 may be a capillary tube or a throttling valve or the like.
  • the present invention particularly proposes a control method for a refrigerating and freezing device, the control method comprising:
  • the freezing compartment humidification operation is performed to increase the humidity in the freezing compartment 11 to meet the preset condition before stopping the compressor 21 and the freezing fan 31 .
  • the control method of the present invention does not immediately stop the compressor 21 when the refrigerating and freezing device 1 reaches the preset automatic shutdown condition, but first performs the humidification operation of the freezing compartment to increase the humidity in the freezing compartment 11 to meet the preset condition Stop again. After shutting down, the humidity in the freezer compartment 11 no longer drops, and even rises slowly, thus, the average humidity in the freezer compartment 11 can be improved, and the low humidity in the freezer compartment 11 can avoid affecting the food preservation effect.
  • the present invention particularly proposes a control method for a refrigerating and freezing device, the control method comprising:
  • the refrigerating fan 31 is controlled to stop, and the refrigerant is controlled to flow through the refrigerating throttling device 23 and the refrigerating evaporator 22;
  • the refrigeration fan 31 is stopped after the refrigeration fan 31 continues to run for the first preset time.
  • the humidification operation of the refrigerated compartment specifically includes controlling the refrigerating fan 31 to stop, controlling the refrigerant to flow through the refrigerating throttling device 23 and the refrigerating evaporator 22, and adjusting the operating frequency of the compressor 21 until the refrigerating and evaporating
  • the temperature difference between the temperature of the evaporator of the evaporator 22 and the temperature of the compartment in the freezing compartment 11 is greater than or equal to the preset minimum temperature difference, stop the operation of the compressor 21, and start the freezing fan 31 to make it continue to run for the first preset time. Stop freezing fan 31.
  • the preset condition is jointly determined by the temperature difference between the evaporator temperature of the refrigerated evaporator 22 and the compartment temperature in the refrigerated compartment 11 and the duration of continuous operation of the refrigerated fan 31 .
  • the control method of the present invention does not stop the compressor 21 immediately when the refrigerating and freezing device 1 reaches the preset automatic shutdown condition, but first stops the freezing fan 31 to stop blowing the airflow in the freezing compartment 11, and by adjusting the compressor 21
  • the operating frequency makes the evaporator temperature of the refrigerating evaporator 22 higher than the compartment temperature in the refrigerated compartment 11, and then stops the compressor 21, starts the refrigerating fan 31, and impels airflow between the refrigerating evaporator 22 and the refrigerating compartment by the refrigerating fan 31. Circulating flow between chambers 11.
  • the evaporator temperature of the refrigerated evaporator 22 is higher than the compartment temperature in the freezer compartment 11 at this moment, therefore, the outside water vapor in the freezer compartment 11 and the moisture in the freezer compartment 11 (for example, food volatilized by the door seal) Moisture) and the moisture formed by frost sublimation on the freezing evaporator 22 will condense in the freezing compartment 11 with a lower temperature instead of condensing at the freezing evaporator 22, thereby effectively increasing the temperature in the freezing compartment 11.
  • the moisture content in the freezer compartment increases the humidity in the freezer compartment 11.
  • the present invention first improves the humidity in the freezing compartment 11 before the shutdown of the refrigerating and freezing device 1 and then shuts down. After shutting down, the humidity in the freezer compartment 11 no longer drops, and even rises slowly, thus, the average humidity in the freezer compartment 11 can be improved, and the low humidity in the freezer compartment 11 can avoid affecting the food preservation effect.
  • the refrigerated fan 31 can humidify the refrigerated compartment 11 during operation. Therefore, the present invention limits the running time of the freezing fan 31 to a certain extent, so that the humidity in the freezing compartment 11 can be effectively increased, and the slightly higher temperature airflow formed after passing through the freezing evaporator 22 will not be blown for a long time. Going to the freezing compartment 11 causes the temperature of the freezing compartment 11 to rise significantly.
  • the control method of the present invention adjusts the humidity in the freezer compartment 11 before shutting down, and does not need to restart the compressor 21 for humidification operation after shutting down, so as to avoid the damage caused by frequent starting and stopping of the compressor 21 .
  • the present invention realizes the purpose of improving the humidity in the refrigerating compartment 11 through the start-stop control of the refrigerating fan 31 and the control of the stop time and operating frequency of the compressor 21. Adding any auxiliary structure, therefore, will not have any impact on the original structure and storage capacity of the refrigerating and freezing device 1, which improves the feasibility of practical application.
  • Fig. 3 is a schematic flow chart of a control method of a refrigerating and freezing device according to a specific embodiment of the present invention.
  • the control method of the present invention includes:
  • Step S10 judging whether the refrigerating and freezing device 1 has reached the preset automatic shutdown condition; if so, go to step S20, if not, go back to continue judging;
  • Step S20 controlling the refrigeration fan 31 to be in a stopped state
  • Step S30 controlling the refrigerant to flow through the refrigeration throttling device 23 and the refrigeration evaporator 22;
  • Step S40 adjusting the operating frequency of the compressor 21 until the temperature difference between the evaporator temperature of the refrigerated evaporator 22 and the temperature of the compartment in the refrigerated compartment 11 is greater than or equal to a preset minimum temperature difference, and the preset minimum temperature difference is greater than zero;
  • Step S50 stop the operation of the compressor 21, and start the refrigeration fan 31;
  • Step S60 judging whether the continuous operation time of the refrigeration fan 31 reaches the first preset duration; if so, go to step S70, if not, go back to continue judging;
  • Step S70 stop the refrigeration fan 31.
  • At least one non-refrigerated compartment is defined in the box body 10, and at least one non-refrigerated branch circuit is connected in parallel at both ends of the freezer throttling device 23 for respectively providing cooling capacity for the at least one non-refrigerated compartment,
  • the compression refrigeration system 20 also includes a switching valve 24 for connecting the refrigeration throttling device 23 and one of the at least one non-refrigeration branch circuits.
  • At least one non-refrigerated compartment may include a refrigerated compartment 12, and at least one non-refrigerated branch may include a refrigerated branch for providing cooling capacity to the refrigerated compartment 12, and the refrigerated branch includes a refrigerated evaporator 25 and a refrigerated evaporator 25 connected in series.
  • the refrigeration throttling device 26 may be a capillary tube or a throttle valve or the like.
  • At least one non-refrigerated compartment may also include a temperature-variable compartment 13, and at least one non-refrigerated branch may also include a variable-temperature branch for providing cooling capacity to the variable-temperature compartment 13, and the variable-temperature branch may include a series-connected variable-temperature evaporator 27 and
  • the variable temperature throttling device 28, the variable temperature throttling device 28 may be a capillary or a throttle valve.
  • the refrigerating and freezing device 1 When the freezer compartment 11 , the refrigerated compartment 12 and the variable temperature compartment 13 are simultaneously defined in the box body 10 , the refrigerating and freezing device 1 usually operates in the order of the refrigerated compartment cooling, the variable temperature compartment cooling and the freezing compartment cooling. That is, when the refrigeration of the freezer compartment starts, the cooling of the refrigerator compartment and the cooling of the variable temperature compartment have usually been completed; that is, before reaching the automatic shutdown condition, the refrigerator-freezer 1 is usually in the cooling state of the freezer compartment. It can be understood that, in the cooling state of the freezing compartment 11, the refrigeration fan 31 is in operation, and the switching valve 24 is in the state of conducting the refrigeration throttling device 23, so that the refrigerant flows through the refrigeration throttling device 23 and the refrigeration evaporator. 22, thereby achieving the purpose of cooling the freezer compartment 11.
  • the step S30 of controlling the flow of the refrigerant through the refrigeration throttling device 23 and the refrigeration evaporator 22 may specifically include:
  • the state of the switching valve 24 is kept unchanged.
  • the refrigerating and freezing device 1 is in the cooling state of the freezer compartment, and the switch valve 24 is already in the state of conducting the freezing throttling device 23. Therefore, after the automatic shutdown condition is reached, the state of the switch valve 24 No further changes are required.
  • the refrigerating-freezing device 1 may also be in the cooling state of the non-freezing compartment, for example, in the cooling state of refrigeration or the cooling state of variable temperature.
  • the refrigerating fan 31 In the cooling state of the non-refrigerated compartment, the refrigerating fan 31 is in a stopped state and does not send air to the refrigerated compartment 11, the switching valve 24 is in the state of conducting the corresponding non-refrigerated branch, and the refrigerated throttling device 23 has no refrigerant flowing through it. .
  • the step S30 of controlling the flow of the refrigerant through the refrigeration throttling device 23 and the refrigeration evaporator 22 may specifically include:
  • the switching valve 24 is switched to the state where the refrigeration throttling device 23 is turned on.
  • the step S40 of adjusting the operating frequency of the compressor 21 until the temperature difference between the evaporator temperature of the refrigerated evaporator 22 and the temperature of the compartments in the refrigerated compartment 11 is greater than or equal to the preset minimum temperature difference may specifically be include:
  • the temperature difference between the evaporator temperature and the compartment temperature is less than the preset minimum temperature difference, then reduce the operating frequency of the compressor 21, and return to continue obtaining the evaporator temperature of the freezing evaporator 22 and the compartment temperature in the freezing compartment 11 , until the temperature difference between the evaporator temperature and the compartment temperature is greater than or equal to the preset minimum temperature difference.
  • the present invention monitors the temperature difference between the evaporator temperature and the compartment temperature by acquiring the evaporator temperature of the refrigerated evaporator 22 and the compartment temperature in the refrigerated compartment 11, and gradually and slowly reduces the operation of the compressor 21. frequency, so that the temperature of the evaporator of the refrigeration evaporator 22 is higher than the temperature of the compartment in the freezer compartment 11, the humidity in the freezer compartment 11 can be increased simply and effectively, and the operating frequency of the compressor 21 can be avoided from being reduced too much at one time. Many cause the temperature rise of the refrigerated evaporator 22 to be too high and have a greater impact on the temperature of the refrigerated compartment 11 .
  • FIG. 4 is a schematic flow chart of a control method for a refrigerating and freezing device according to another specific embodiment of the present invention.
  • the control method of the present invention includes:
  • Step S10 judging whether the refrigerating and freezing device 1 has reached the preset automatic shutdown condition; if so, go to step S20, if not, go back to continue judging;
  • Step S20 controlling the refrigeration fan 31 to be in a stopped state
  • Step S30 controlling the refrigerant to flow through the refrigeration throttling device 23 and the refrigeration evaporator 22;
  • Step S41 controlling the compressor 21 to run at a frequency lower than its first set frequency in the cooling state of the freezing compartment;
  • Step S42 obtaining the evaporator temperature of the refrigerated evaporator 22 and the compartment temperature in the refrigerated compartment 11;
  • Step S43 calculating the temperature difference between the evaporator temperature and the compartment temperature
  • Step S44 judging whether the temperature difference between the evaporator temperature and the compartment temperature is less than the preset minimum temperature difference; if yes, go to step S45, if not, go to step S50;
  • Step S45 reduce the operating frequency of the compressor 21, and return to step S42;
  • Step S50 stop the operation of the compressor 21, and start the refrigeration fan 31;
  • Step S60 judging whether the continuous operation time of the refrigeration fan 31 reaches the first preset duration; if so, go to step S70, if not, go back to continue judging;
  • Step S70 stop the refrigeration fan 31.
  • the operating frequency of the compressor 21 is reduced by the same magnitude each time. That is to say, the operating frequency of the compressor 21 is reduced in a balanced manner, and the control is relatively simple.
  • the operating frequency of the compressor 21 can be reduced in the range of 2-20 Hz each time, so as to find the compressor 21 that can increase the humidity in the freezer compartment 11 and have the least impact on the temperature in the freezer compartment 11.
  • operating frequency For example, the operating frequency of the compressor 21 is reduced by 2 Hz, 4 Hz, 6 Hz, 8 Hz, 10 Hz, 12 Hz, 14 Hz, 16 Hz, 18 Hz or 20 Hz and so on.
  • the preset minimum temperature difference may be any temperature difference within a range of 2°C to 4°C.
  • the preset minimum temperature difference may be 2°C, 2.5°C, 3°C, 3.5°C or 4°C. That is to say, when the evaporator temperature of the freezing evaporator 22 is 2-4°C higher than the temperature of the compartment in the freezing compartment 11, not only can a better humidification effect be obtained in the freezing compartment 11, but also it will not affect the The temperature in the freezer compartment 11 has a large influence.
  • the first preset duration may be any duration value ranging from 3 to 10 minutes.
  • the first preset duration may be 3 min, 4 min, 5 min, 6 min, 7 min, 8 min, 9 min or 10 min.
  • the value of the first preset time length is too small, that is, the time that the refrigeration fan 31 runs is too short, and the humidification effect in the freezing compartment 11 is not obvious; the value of the first preset time length is too large, that is, the time that the refrigeration fan 31 runs is too long , will cause the temperature in the freezing compartment 11 to rise significantly. Therefore, the present invention sets the first preset time length to any time length value ranging from 3 to 10 minutes, which can not only effectively humidify the freezing compartment 11, but also avoid large fluctuations in the temperature in the freezing compartment 11.
  • the above-mentioned automatic shutdown condition is that the temperature of each storage compartment of the refrigerating-freezing device 1 reaches its respective set temperature.
  • the automatic shutdown condition is that the freezing compartment 11 reaches the set freezing temperature.
  • the automatic shutdown condition is that the refrigerating compartment 12 reaches the refrigerated compartment. Set the temperature, the variable temperature compartment 13 reaches the variable temperature set temperature, and the freezing compartment 11 reaches the freezing set temperature.
  • FIG. 9 is a schematic structural block diagram of the refrigerating and freezing device according to an embodiment of the present invention.
  • the refrigerating and freezing device 1 of the present invention includes a box body 10 defining a freezing compartment 11, a freezing fan 31 for driving air supply to the freezing compartment 11, and a compressor 21 Compression refrigeration system 20.
  • the refrigerating and freezing device 1 also includes a control device 40, the control device 40 includes a processor 41 and a memory 42, the memory 42 stores a machine executable program 43, and the machine executable program 43 is used to realize The control method described in any one of the above embodiments.
  • both the compressor 21 and the refrigeration fan 31 are connected to the control device 40 to operate under the control of the control device 40 .
  • the processor 41 may be a central processing unit (central processing unit, CPU for short), or a digital processing unit or the like.
  • the processor 41 sends and receives data through the communication interface.
  • the memory 44 is used to store programs executed by the processor 41 .
  • the memory 44 is any medium that can be used to carry or store desired program codes in the form of instructions or data structures and can be accessed by a computer, and can also be a combination of multiple memories.
  • the above-mentioned machine-executable program 43 can be downloaded from a computer-readable storage medium to a corresponding computing/processing device or downloaded to a computer or an external storage device via a network (such as the Internet, a local area network, a wide area network, and/or a wireless network).
  • the present invention first improves the humidity in the freezing compartment 11 before the shutdown of the refrigerating and freezing device 1 and then shuts down. After shutting down, the humidity in the freezer compartment 11 no longer drops, and even rises slowly, thus, the average humidity in the freezer compartment 11 can be improved, and the low humidity in the freezer compartment 11 can avoid affecting the food preservation effect.
  • refrigerating-freezing apparatus 1 of the present invention carries out certain limitation to the running time of refrigerating blower fan 31, can effectively improve the humidity in refrigerating compartment 11, can not pass through the temperature formed after refrigerating evaporator 22 for a long time again. Slightly higher airflow is blown to the freezer compartment 11 causing the temperature of the freezer compartment 11 to rise significantly.
  • control method of the present invention adjusts the humidity in the freezer compartment 11 before shutting down, and does not need to restart the compressor 21 to perform humidification operation after shutting down, so as to avoid the damage caused by the frequent start and stop of the compressor 21.
  • the present invention specifically proposes a control method for a refrigerating and freezing device, the control method comprising:
  • control compressor 21 and the freezing fan 31 stop running; that is, when the humidity in the freezing compartment 11 is higher than or equal to the preset maximum humidity , stop directly;
  • the humidity in the freezing compartment 11 is lower than the preset maximum humidity, then the humidity in the freezing compartment 11 is increased to the preset maximum humidity and then the compressor 21 and the refrigeration fan 31 are controlled to stop running.
  • the freezing compartment humidification operation specifically includes obtaining the humidity in the freezing compartment 11, and humidifying the freezing compartment 11 according to the humidity in the freezing compartment 11 so as to increase the humidity in the freezing compartment 11 to a preset value.
  • the preset condition is that the humidity in the freezing compartment 11 is higher than or equal to the preset maximum humidity.
  • the control method of the present invention does not immediately stop the compressor 21 and the refrigerating fan 31 when the refrigerating and freezing device 1 reaches the preset automatic shutdown condition, but increases the humidity in the refrigerating compartment 11 to the preset maximum humidity and then stops the compressor. 21 and freezing fan 31. That is to say, before the refrigerating and freezing device 1 shuts down, the humidity in the freezing compartment 11 is raised to the preset maximum humidity before shutting down. After shutting down, the humidity in the freezer compartment 11 no longer drops, and even rises slowly. Thus, the humidity in the freezer compartment 11 can be maintained at a higher level of the preset maximum humidity during the shutdown period, avoiding the problem of freezing in the freezer compartment after shutting down. The humidity in the chamber 11 is low, which affects the food preservation effect.
  • the control method of the present invention adjusts the humidity in the freezer compartment 11 before shutting down, and does not need to restart the compressor 21 for humidification operation after shutting down, so as to avoid the damage caused by frequent starting and stopping of the compressor 21 .
  • the present invention realizes the purpose of improving the humidity in the freezing compartment 11 by controlling the stop time and operating frequency of the compressor 21, without adding any auxiliary structure, therefore, no Any impact on the original structure and storage capacity of the refrigerating and freezing device 1 improves the feasibility of practical application.
  • Fig. 5 is a schematic flowchart of a control method for a refrigerating and freezing device according to a specific embodiment of the present invention.
  • the control method of the present invention includes:
  • Step S10' judging whether the refrigerating and freezing device 1 has reached the preset automatic shutdown condition; if so, then go to step S20', if not, then return to continue judging;
  • Step S20' obtaining the humidity in the freezing compartment 11;
  • Step S30' judging whether the humidity in the freezer compartment 11 is lower than the preset maximum humidity, if so, then go to step S40', if not, then go to step S50';
  • Step S40' increasing the humidity in the freezing compartment 11 to a preset maximum humidity
  • Step S50' controlling the compressor 21 and the refrigerating fan 31 to stop running.
  • the refrigerating and freezing device 1 before reaching the automatic shutdown condition, the refrigerating and freezing device 1 is in the cooling state of the freezing compartment; in the cooling state of the freezing compartment 11, the freezing fan 31 is in the running state, and the refrigerant flows through the freezing evaporator 22 and the freezing Throttling device 23.
  • the refrigerating-freezing device 1 only includes the freezing compartment 11, the refrigerating-freezing device 1 must be in the cooling state of the freezing compartment before reaching the automatic shutdown condition.
  • the refrigerating-freezing device 1 includes at least one non-refrigerating compartment in addition to the freezing compartment 11, such as a refrigerating compartment and a variable-temperature compartment, then the refrigerating-freezing device 1 usually follows the refrigerating of the refrigerating compartment and the cooling of the variable-temperature compartment. and freezer compartment cooling in sequence. That is, when the refrigeration of the freezer compartment starts, the cooling of the refrigerator compartment and the cooling of the variable temperature compartment have usually been completed; that is, before reaching the automatic shutdown condition, the refrigerator-freezer 1 is usually in the cooling state of the freezer compartment.
  • the step S40' of increasing the humidity in the freezer compartment 11 to a preset maximum humidity may specifically include:
  • the operation of the refrigeration fan 31 can impel the airflow to circulate between the refrigeration evaporator 22 and the refrigeration compartment 11. Since the temperature of the evaporator of the refrigeration evaporator 22 is higher than the temperature of the compartment in the refrigeration compartment 11, it enters through the door seal. The external water vapor in the freezer compartment 11, the moisture in the freezer compartment 11 (such as the moisture volatilized by food materials), and the moisture formed by the frost sublimation on the freezer evaporator 22 will condense in the freezer compartment 11 with a lower temperature and form It is not condensed at the freezing evaporator 22 , thus, the moisture content in the freezing compartment 11 can be effectively increased, thereby increasing the humidity in the freezing compartment 11 to a preset maximum humidity.
  • At least one non-refrigerated compartment is defined in the cabinet 10, and the compression refrigeration system 20 further includes a refrigeration branch circuit connected in series with the compressor 21, and the refrigeration branch circuit includes a refrigeration evaporator 21 and a refrigeration throttling device 23. At least one non-refrigerating branch circuit is connected in parallel at both ends of the freezing throttling device 23 for providing cooling capacity for at least one non-refrigerating compartment, and the compression refrigeration system 20 also includes at least one Switching valve 24 of one of the non-refrigerated branches.
  • At least one non-refrigerated compartment may include a refrigerated compartment 12, and at least one non-refrigerated branch may include a refrigerated branch for providing cooling capacity to the refrigerated compartment 12, and the refrigerated branch may include refrigerated evaporators 25 connected in series.
  • the refrigerating throttling device 26, the refrigerating throttling device 26 can be a capillary tube or a throttle valve or the like.
  • At least one non-refrigerated compartment may also include a temperature-variable compartment 13, and at least one non-refrigerated branch may also include a variable-temperature branch for providing cooling capacity to the variable-temperature compartment 13, and the variable-temperature branch may include a series-connected variable-temperature evaporator 27 and
  • the variable temperature throttling device 28, the variable temperature throttling device 28 may be a capillary or a throttle valve.
  • the refrigerating-freezing device 1 before reaching the automatic shutdown condition, can be in the cooling state of the non-freezing compartment; in the cooling state of the non-freezing compartment, the freezing fan 31 is in a stopped state; The non-refrigerated branch corresponding to the compartment.
  • step S40' can specifically include:
  • Step S41' control the switching valve 24 to switch to the state of conducting the refrigeration throttling device 23;
  • Step S42' start the refrigeration fan 31
  • Step S43' controlling the compressor 21 to run at a frequency lower than its first set frequency in the cooling state of the freezing compartment, so that the evaporator temperature of the freezing evaporator 22 is higher than the compartment temperature in the freezing compartment 11 .
  • refrigerating fan 31 runs, can impel airflow to circulate between refrigerating evaporator 22 and refrigerating compartment 11, because the evaporator temperature of refrigerating evaporator 22 is higher than the intercompartment temperature in refrigerating compartment 11, therefore, by The outside water vapor that the door seal enters into the freezer compartment 11, the moisture in the freezer compartment 11 (such as the moisture volatilized by food materials), and the moisture formed by the sublimation of frost on the freezer evaporator 22 will be in the freezer compartment 11 with a lower temperature. Instead of condensing at the freezing evaporator 22, the moisture content in the freezing compartment 11 can be effectively increased, thereby increasing the humidity in the freezing compartment 11 to a preset maximum humidity.
  • Fig. 7 is a schematic flowchart of a control method of a refrigerating and freezing device according to another embodiment of the present invention.
  • the compressor 21 is controlled to run at a frequency lower than its first set frequency in the cooling state of the freezing compartment, so that the evaporator temperature of the freezing evaporator 22 is higher than that of the compartment in the freezing compartment 11.
  • the steps at room temperature may specifically include:
  • Step S431' controlling the compressor 21 to run at a frequency lower than its first set frequency in the cooling state of the freezing compartment;
  • Step S432' obtaining the evaporator temperature of the refrigerated evaporator 22 and the compartment temperature in the refrigerated compartment 11;
  • Step S433' calculating the temperature difference between the evaporator temperature and the compartment temperature
  • Step S434' judging whether the temperature difference between the evaporator temperature and the compartment temperature is less than the preset minimum temperature difference; if yes, go to step S435', if not, go to step S436';
  • Step S435' reduce the operating frequency of the compressor 21, and return to step S432';
  • Step S436' keep the operating frequency of the compressor 21 unchanged, and return to step S20'.
  • the preset minimum temperature difference is greater than zero. That is, it is necessary to ensure that the temperature difference between the evaporator temperature and the compartment temperature is positive, that is, ensure that the evaporator temperature of the freezing evaporator 22 is greater than the compartment temperature in the freezing compartment 11 .
  • the present invention monitors the temperature difference between the evaporator temperature and the compartment temperature by acquiring the evaporator temperature of the freezing evaporator 22 and the compartment temperature in the freezing compartment 11, and gradually and slowly reduces the operating frequency of the compressor 21, so that The evaporator temperature of the refrigerated evaporator 22 is higher than the temperature of the compartment in the refrigerated compartment 11, so that moisture and the like can be kept in the refrigerated compartment to increase the humidity in the refrigerated compartment, and it can also prevent the operating frequency of the compressor 21 from reducing too much at one time. Many cause the 22 temperature rises of the refrigerated evaporator to be too high and have a greater impact on the temperature of the refrigerated compartment 11.
  • the preset minimum temperature difference may be any temperature difference within a range of 2°C to 4°C.
  • the preset minimum temperature difference may be 2°C, 2.5°C, 3°C, 3.5°C or 4°C. That is to say, when the evaporator temperature of the freezing evaporator 22 is 2-4°C higher than the temperature of the compartment in the freezing compartment 11, not only can a better humidification effect be obtained in the freezing compartment 11, but also it will not affect the The temperature in the freezer compartment 11 has a large influence.
  • the operating frequency of the compressor 21 is reduced by the same magnitude each time. That is to say, the operating frequency of the compressor 21 is reduced in a balanced manner, and the control is relatively simple.
  • the operating frequency of the compressor 21 can be reduced in the range of 2-20 Hz each time, so as to find the compressor 21 that can increase the humidity in the freezer compartment 11 and have the least impact on the temperature in the freezer compartment 11.
  • operating frequency For example, the operating frequency of the compressor 21 is reduced by 2 Hz, 4 Hz, 6 Hz, 8 Hz, 10 Hz, 12 Hz, 14 Hz, 16 Hz, 18 Hz or 20 Hz and so on.
  • the preset maximum humidity may be any relative humidity value ranging from 80% to 100%.
  • the preset maximum humidity can be 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93% %, 94%, 95%, 96%, 97%, 98%, 98%, or 100%. That is to say, before shutting down, the humidity in the freezer compartment 11 needs to be increased to a higher level above 80% before shutting down, so as to ensure that the humidity in the freezer compartment 11 is stably maintained at a higher level during shutdown.
  • the above-mentioned automatic shutdown condition is that the temperature of each storage compartment of the refrigerating-freezing device 1 reaches its respective set temperature.
  • the automatic shutdown condition is that the freezing compartment 11 reaches the set freezing temperature.
  • the automatic shutdown condition is that the refrigerating compartment 12 reaches the refrigerated compartment. Set the temperature, the variable temperature compartment 13 reaches the variable temperature set temperature, and the freezing compartment 11 reaches the freezing set temperature.
  • the invention also provides a refrigerating and freezing device.
  • the refrigerating and freezing device 1 of the present invention includes a box body 10 defining a freezing compartment 11, a freezing fan 31 for driving air supply to the freezing compartment 11, and a compressor 21 Compression refrigeration system 20.
  • the refrigerating and freezing device 1 also includes a control device 40, the control device 40 includes a processor 41 and a memory 42, the memory 42 stores a machine executable program 43, and the machine executable program 43 is used to realize The control method described in any one of the above embodiments.
  • both the compressor 21 and the refrigeration fan 31 are connected to the control device 40 to operate under the control of the control device 40 .
  • the refrigerating and freezing device 1 of the present invention does not stop the compressor 21 and the refrigerating fan 31 immediately when the preset automatic shutdown condition is reached, but stops the compressor 21 and the refrigerating fan 31 after increasing the humidity in the refrigerating compartment 11 to the preset maximum humidity. Freezing fan 31. That is to say, before the refrigerating and freezing device 1 is shut down, the humidity in the freezing compartment 11 is increased to the preset maximum humidity before shutting down. After shutting down, the humidity in the freezer compartment 11 no longer drops, and even rises slowly. Thus, the humidity in the freezer compartment 11 can be maintained at a higher level of the preset maximum humidity during the shutdown period, avoiding the problem of freezing in the freezer compartment after shutting down. The humidity in the chamber 11 is low, which affects the food preservation effect.
  • the refrigerating and freezing device 1 of the present invention adjusts the humidity in the freezing compartment 11 before shutting down, and does not need to restart the compressor 21 for humidification after shutting down, so as to avoid the damage caused by frequent starting and stopping of the compressor 21.
  • the present invention realizes the purpose of improving the humidity in the freezing compartment 11 by controlling the stop time and operating frequency of the compressor 21, without adding any auxiliary structure, therefore, no Any impact on the original structure and storage capacity of the refrigerating and freezing device 1 improves the feasibility of practical application.
  • the applicant further thought that if the operating frequency of the compressor 21 is reduced to a certain lower frequency than the first set frequency of the compressor 21 in the cooling state of the freezing compartment, the temperature of the refrigerating evaporator 22 will rise. As high as the temperature higher than the freezing compartment 11, then water vapor will gather in the freezing compartment 11, and this principle can be used to effectively moisturize the freezing compartment 11 or increase the humidity in the freezing compartment 11.
  • the present invention particularly proposes a control method for a refrigerating and freezing device, the control method comprising:
  • the refrigerating fan 31 is controlled to stop, the refrigerant is controlled to flow through the refrigerating throttling device 23 and the refrigerating evaporator 22, and the compressor 21 is controlled to run at a preset frequency.
  • the preset frequency is set so that the evaporator temperature of the refrigerated evaporator 22 is higher than the compartment temperature in the refrigerated compartment 11;
  • the refrigeration fan 31 is stopped after the refrigeration fan 31 continues to run for the first preset time.
  • the control method of the present invention presets a lower preset frequency based on experience, and when the compressor 21 operates at the preset frequency, the evaporator temperature of the refrigerated evaporator 22 is higher than the temperature of the compartment in the refrigerated compartment 11 .
  • the compressor 21 is not stopped immediately, but the refrigerating fan 31 is stopped first, and the compressor 21 is run at the preset frequency for a second preset duration before stopping the compressor 21 .
  • the temperature of the refrigerated evaporator 22 has risen back to at least the temperature of the refrigerated compartment 11, and then by starting the refrigerated blower fan 31, the airflow is circulated between the refrigerated evaporator 22 and the refrigerated compartment 11. Therefore, through the door The external water vapor sealed in the freezer compartment 11, the moisture in the freezer compartment 11 (such as the volatilized moisture of food materials), and the moisture formed by the frost sublimation on the freezer evaporator 22 will condense in the freezer compartment with a lower temperature and form It is not condensed at the freezing evaporator, thus, the moisture content in the freezing compartment 11 can be effectively increased, and the humidity in the freezing compartment 11 can be increased.
  • the present invention first improves the humidity in the freezing compartment 11 before the shutdown of the refrigerating and freezing device 1 and then shuts down. After shutting down, the humidity in the freezer compartment 11 no longer drops, and even rises slowly. Thus, a relatively high humidity can be maintained in the freezer compartment 11 during shutdown, which increases the average humidity in the freezer compartment 11 and avoids The low humidity in the freezer compartment 11 affects the food preservation effect.
  • the present invention presets a lower preset frequency based on experience, so that the operating frequency of the compressor during humidification is constant, and only needs to monitor the time during which the compressor 21 operates at the preset frequency, which simplifies the control logic.
  • the refrigerated fan 31 can humidify the refrigerated compartment 11 during operation. Therefore, in the present invention, after the compressor 21 runs at a preset frequency for a second preset duration, the refrigeration fan 31 is started and the running time of the refrigeration fan 31 is limited to a certain extent, which can effectively increase the humidity in the freezer compartment 11, And the slightly higher temperature airflow formed after passing through the freezing evaporator 22 will not be blown to the freezing compartment 11 for a long time, causing the temperature of the freezing compartment 11 to rise significantly.
  • the control method of the present invention adjusts the humidity in the freezer compartment 11 before shutting down, and does not need to restart the compressor 21 for humidification operation after shutting down, so as to avoid the damage caused by frequent starting and stopping of the compressor 21 .
  • the present invention realizes the purpose of improving the humidity in the freezing compartment 11 by controlling the operating hours of the freezing fan 31 and the compressor 21 on the basis of the original structure of the refrigerating and freezing device 1, without adding any auxiliary structure. Any impact on the original structure and storage capacity of the refrigerating and freezing device 1 improves the feasibility of practical application.
  • Fig. 8 is a schematic flowchart of a control method for a refrigerating and freezing device according to yet another specific embodiment of the present invention.
  • the control method of the present invention includes:
  • Step S10 judge whether the refrigerating and freezing device 1 reaches the preset automatic shutdown condition; if so, go to step S20", if not, return to continue judging;
  • Step S20 controlling the refrigeration fan 31 to stop, controlling the refrigerant to flow through the refrigeration throttling device 23 and the refrigeration evaporator 22, and controlling the compressor 21 to run at a preset frequency;
  • Step S30 judge whether the compressor 21 operates at a preset frequency for a second preset duration; if so, go to step S40", if not, return to continue judging;
  • Step S40 stop the operation of the compressor 21, and start the refrigeration fan 31;
  • step S50 it is judged whether the continuous operation of the refrigeration fan 31 has reached the first preset duration; if so, then go to step S60", if not, then return to continue the judgment;
  • Step S60 stop the refrigeration fan 31.
  • the preset frequency is 20-90 Hz lower than the first preset frequency of the compressor 21 in the cooling state of the freezer compartment.
  • the preset frequency may be 20 Hz, 30 Hz, 40 Hz, 50 Hz, 60 Hz, 70 Hz, 80 Hz or 90 Hz lower than the first set frequency.
  • the compressor 21 when the refrigerating and freezing apparatus 1 is in the cooling state of the freezing compartment, the compressor 21 operates at the first set frequency.
  • the compressor 21 When the refrigerating and freezing device 1 reaches the automatic shutdown condition, the compressor 21 operates at a preset frequency lower than the first preset frequency of 20-90 Hz, which can ensure that the evaporator temperature of the freezing evaporator 22 is higher than that of the freezing compartment 11. room temperature.
  • the value of the preset frequency is neither too low nor too high. If the value of the preset frequency is too low, the temperature of the evaporator of the refrigerating evaporator 22 is too high. When the refrigerating fan 31 is running, the airflow with a higher temperature will be blown to the refrigerating compartment 11, causing the temperature of the refrigerating compartment 11 to rise obviously, affecting Food preservation effect. If the value of the preset frequency is too high, the temperature of the evaporator of the refrigerated evaporator 22 is too low, which cannot ensure that the temperature of the evaporator is higher than the temperature of the refrigerated compartment 11 , and the refrigerated compartment 11 cannot be effectively humidified.
  • the second preset duration may be any duration value ranging from 1 to 10 minutes.
  • the first preset duration may be 1 min, 2 min, 3 min, 4 min, 5 min, 6 min, 7 min, 8 min, 9 min or 10 min.
  • the compressor 21 runs at a preset frequency for 1 to 10 minutes, which can ensure that the temperature of the evaporator of the refrigerated evaporator 22 rises to a temperature higher than that of the refrigerated compartment 11, thereby effectively humidifying the refrigerated compartment 11 when the refrigerated fan 31 starts running . If the compressor 21 runs at the preset frequency for too short a time, the evaporator temperature of the refrigerated evaporator 22 may not rise. If the compressor 21 runs at the preset frequency for too long, energy consumption will be wasted.
  • At least one non-refrigerated compartment is defined in the box body 10, and at least one non-refrigerated branch circuit is connected in parallel at both ends of the freezer throttling device 23 for respectively providing cooling capacity for the at least one non-refrigerated compartment,
  • the compression refrigeration system 20 also includes a switching valve 24 for connecting the refrigeration throttling device 23 and one of the at least one non-refrigeration branch circuits.
  • At least one non-refrigerated compartment may include a refrigerated compartment 12, and at least one non-refrigerated branch may include a refrigerated branch for providing cooling capacity to the refrigerated compartment 12, and the refrigerated branch includes a refrigerated evaporator 25 and a refrigerated evaporator 25 connected in series.
  • the refrigeration throttling device 26 may be a capillary tube or a throttle valve or the like.
  • At least one non-refrigerated compartment may also include a temperature-variable compartment 13, and at least one non-refrigerated branch may also include a variable-temperature branch for providing cooling capacity to the variable-temperature compartment 13, and the variable-temperature branch may include a series-connected variable-temperature evaporator 27 and
  • the variable temperature throttling device 28, the variable temperature throttling device 28 may be a capillary or a throttle valve.
  • the refrigerating and freezing device 1 When the freezer compartment 11 , the refrigerated compartment 12 and the variable temperature compartment 13 are simultaneously defined in the box body 10 , the refrigerating and freezing device 1 usually operates in the order of the refrigerated compartment cooling, the variable temperature compartment cooling and the freezing compartment cooling. That is, when the refrigeration of the freezer compartment starts, the cooling of the refrigerator compartment and the cooling of the variable temperature compartment have usually been completed; that is, before reaching the automatic shutdown condition, the refrigerator-freezer 1 is usually in the cooling state of the freezer compartment. It can be understood that, in the cooling state of the freezing compartment 11, the refrigeration fan 31 is in operation, and the switching valve 24 is in the state of conducting the refrigeration throttling device 23, so that the refrigerant flows through the refrigeration throttling device 23 and the refrigeration evaporator. 22, thereby achieving the purpose of cooling the freezer compartment 11.
  • the step S20" of controlling the flow of refrigerant through the refrigeration throttling device 23 and the refrigeration evaporator 22 may specifically include:
  • the state of the switching valve 24 is kept unchanged.
  • the step of controlling refrigeration blower fan 31 to be in stop state comprises:
  • the switching valve 24 is already in the state of conducting the freezing throttling device 23, and the freezing fan 31 is in the running state. Therefore, after the automatic shutdown condition is reached, the state of the switching valve 24 does not need to be changed, and only the refrigeration blower 31 needs to be stopped.
  • the refrigerating-freezing device 1 may also be in the cooling state of the non-freezing compartment, for example, in the cooling state of refrigeration or the cooling state of variable temperature.
  • the refrigerating fan 31 In the cooling state of the non-refrigerated compartment, the refrigerating fan 31 is in a stopped state and does not send air to the refrigerated compartment 11, the switching valve 24 is in the state of conducting the corresponding non-refrigerated branch, and the refrigerated throttling device 23 has no refrigerant flowing through it. .
  • the step S20" of controlling the flow of refrigerant through the refrigeration throttling device 23 and the refrigeration evaporator 22 may specifically include:
  • the switching valve 24 is switched to the state where the refrigeration throttling device 23 is turned on.
  • the step of controlling refrigeration blower fan 31 to be in stop state comprises:
  • the first preset duration may be any duration value ranging from 3 to 10 minutes.
  • the second preset duration may be 3 min, 4 min, 5 min, 6 min, 7 min, 8 min, 9 min or 10 min.
  • the value of the first preset time length is too small, that is, the time that the refrigeration fan 31 runs is too short, and the humidification effect in the freezing compartment 11 is not obvious; the value of the first preset time length is too large, that is, the time that the refrigeration fan 31 runs is too long , will cause the temperature in the freezing compartment 11 to rise significantly. Therefore, the present invention sets the first preset time length to any time length value ranging from 3 to 10 minutes, which can not only effectively humidify the freezing compartment 11, but also avoid large fluctuations in the temperature in the freezing compartment 11.
  • the above-mentioned automatic shutdown condition is that the temperature of each storage compartment of the refrigerating-freezing device 1 reaches its respective set temperature.
  • the automatic shutdown condition is that the freezing compartment 11 reaches the set freezing temperature.
  • the automatic shutdown condition is that the refrigerating compartment 12 reaches the refrigerated compartment. Set the temperature, the variable temperature compartment 13 reaches the variable temperature set temperature, and the freezing compartment 11 reaches the freezing set temperature.
  • the invention also provides a refrigerating and freezing device.
  • the refrigerating and freezing device 1 of the present invention includes a box body 10 defining a freezing compartment 11 , a refrigeration fan 31 and a compression refrigeration system 20 for driving air into the freezing compartment 11 .
  • the compression refrigeration system 20 includes a compressor 21 , a refrigeration evaporator 22 connected in series with the compressor 21 , and a refrigeration throttling device 23 .
  • the refrigerating and freezing device 1 also includes a control device 40, the control device 40 includes a processor 41 and a memory 42, the memory 42 stores a machine executable program 43, and the machine executable program 43 is used to realize The control method described in any one of the above embodiments.
  • both the compressor 21 and the refrigeration fan 31 are connected to the control device 40 to operate under the control of the control device 40 .
  • the refrigerating and freezing device 1 of the present invention increases the humidity in the freezing compartment 11 before shutting down and then shuts down. After shutting down, the humidity in the freezer compartment 11 no longer drops, and even rises slowly. Thus, a relatively high humidity can be maintained in the freezer compartment 11 during shutdown, which increases the average humidity in the freezer compartment 11 and avoids The low humidity in the freezer compartment 11 affects the food preservation effect.
  • the present invention presets a lower preset frequency based on experience, so that the operating frequency of the compressor during humidification is constant, and only needs to monitor the time during which the compressor 21 operates at the preset frequency, which simplifies the control logic.
  • the refrigerated fan 31 can humidify the refrigerated compartment 11 during operation. Therefore, in the present invention, after the compressor 21 runs at a preset frequency for a second preset duration, the refrigeration fan 31 is started and the running time of the refrigeration fan 31 is limited to a certain extent, which can effectively increase the humidity in the freezer compartment 11, And the slightly higher temperature airflow formed after passing through the freezing evaporator 22 will not be blown to the freezing compartment 11 for a long time, causing the temperature of the freezing compartment 11 to rise significantly.
  • the control method of the present invention adjusts the humidity in the freezer compartment 11 before shutting down, and does not need to restart the compressor 21 for humidification operation after shutting down, so as to avoid the damage caused by frequent starting and stopping of the compressor 21 .
  • At least one non-refrigerated compartment is defined in the box body 10, and at least one non-refrigerated branch circuit is connected in parallel at both ends of the freezer throttling device 23 for respectively providing cooling capacity for the at least one non-refrigerated compartment,
  • the compression refrigeration system 20 also includes a switching valve 24 for connecting the refrigeration throttling device 23 and one of the at least one non-refrigeration branch circuits.
  • the switching valve 24 is configured to maintain or switch to the state of conducting the freezing throttling device 23 under control when the refrigerating and freezing device 1 reaches a preset automatic shutdown condition.
  • the refrigerating and freezing device 1 of the present invention is not limited to the three-door refrigerator shown in FIG.
  • the refrigerating and freezing device 1 of the present invention includes not only a refrigerator, but also a freezer, a freezer or other refrigerating and freezing devices with at least a freezing function.

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Abstract

一种冷藏冷冻装置及其控制方法，冷藏冷冻装置包括限定有冷冻间室的箱体、冷冻风机和压缩制冷系统，压缩制冷系统包括压缩机、与压缩机串联连接的冷冻蒸发器和冷冻节流装置。控制方法包括：当冷藏冷冻装置达到预设的自动关机条件时，控制冷冻风机处于停止状态，并控制制冷剂流经冷冻节流装置和冷冻蒸发器；调节压缩机的运行频率，直至冷冻蒸发器的蒸发器温度和冷冻间室内的间室温度之间的温差值大于或等于预设最小温差；停止压缩机的运行，并启动冷冻风机；当冷冻风机持续运行第一预设时长后停止冷冻风机。本发明在停机之前先提高冷冻间室内的湿度后再停机，提高了冷冻间室内的平均湿度，且冷冻间室内的温度不会明显回升。

Description

冷藏冷冻装置及其控制方法 技术领域
本发明涉及冷藏冷冻技术，特别是涉及一种冷藏冷冻装置及其控制方法。
背景技术
冷藏冷冻装置内湿度的高低会影响食材水分蒸发的快慢，从而影响食材的品质。当湿度过低时，食材的水分蒸发较快，会引起食材重量损失，继而造成食物储存效果差和食物保鲜期较短等问题。因此，对冷藏冷冻装置进行保湿始终是至关重要的研究课题。然而，目前的冷藏冷冻装置大多对冷藏室进行加湿保湿，很少关注冷冻室加湿保湿的问题。实际上，风冷式的冷藏冷冻装置在冷冻制冷期间普遍存在湿度波动较大的问题，湿度波动和湿度偏低，储存在冷冻间室内的食材会失水，从而影响食材的口感，而且还会造成营养的流失，影响用户体验。
现有技术中少有的关于冷冻室加湿的方案都是在冷藏冷冻装置内增加非常复杂的加湿装置。然而，冷冻室温度较低，加湿装置本身容易产生凝霜而被堵，而且加湿装置会占用风道空间或间室空间。因此，现有的这些方案不但会增加冷藏冷冻装置的成本和装配难度，而且还非常难以在实际中应用，使得冷冻室湿度低的问题得不到实际解决。
发明内容
本发明第一方面的一个目的旨在克服现有技术的至少一个缺陷，提供一种能够提高冷冻间室内的平均湿度的冷藏冷冻装置的控制方法。
本发明第一方面的一个进一步的目的是能够在停机期间将冷冻间室内的湿度维持在较高水平。
本发明第一方面的另一个进一步的目的是避免对冷冻间室的温度产生较大影响。
本发明第一方面的又一个进一步的目的是简化冷藏冷冻装置的控制逻辑。
本发明第二方面的目的是提供一种能提高冷冻间室内的平均湿度的冷藏冷冻装置。
根据本发明的第一方面，本发明提供一种冷藏冷冻装置的控制方法，所述冷藏冷冻装置包括限定有冷冻间室的箱体、用于向所述冷冻间室内驱动送风的冷冻风机和包括压缩机的压缩制冷系统；所述控制方法包括：
当所述冷藏冷冻装置达到预设的自动关机条件时，执行冷冻间室加湿操作以将所述冷冻间室内的湿度提高至符合预设条件后再停止所述压缩机和所述冷冻风机。
可选地，所述压缩制冷系统还包括与所述压缩机串联连接的冷冻蒸发器和冷冻节流装置；执行冷冻间室加湿操作以将所述冷冻间室内的湿度提高至符合预设条件后再停止所述压缩机和所述冷冻风机的步骤包括：
控制所述冷冻风机处于停止状态，并控制制冷剂流经所述冷冻节流装置和所述冷冻蒸发器；
调节所述压缩机的运行频率，直至所述冷冻蒸发器的蒸发器温度和所述冷冻间室内的间室温度之间的温差值大于或等于预设最小温差，所述预设最小温差大于零；
停止所述压缩机的运行，并启动所述冷冻风机；
当所述冷冻风机持续运行第一预设时长后停止所述冷冻风机。
可选地，所述箱体内还限定有至少一个非冷冻间室，所述冷冻节流装置的两端并联有用于分别为所述至少一个非冷冻间室提供冷量的至少一个非冷冻支路，所述压缩制冷系统还包括用于导通所述冷冻节流装置和所述至少一个非冷冻支路中的其中一个支路的切换阀；
在达到所述自动关机条件之前，所述冷藏冷冻装置处于冷冻间室制冷状态，在所述 冷冻间室制冷状态下，所述冷冻风机处于运行状态；且
控制制冷剂流经所述冷冻节流装置和所述冷冻蒸发器的步骤包括：
保持所述切换阀的状态不变。
可选地，所述箱体内还限定有至少一个非冷冻间室，所述冷冻节流装置的两端并联有用于分别为所述至少一个非冷冻间室提供冷量的至少一个非冷冻支路，所述压缩制冷系统还包括用于导通所述冷冻节流装置和所述至少一个非冷冻支路中的其中一个支路的切换阀；
在达到所述自动关机条件之前，所述冷藏冷冻装置处于非冷冻间室制冷状态，在所述非冷冻间室制冷状态下，所述冷冻风机处于停止状态；且
控制制冷剂流经所述冷冻节流装置和所述冷冻蒸发器的步骤包括：
将所述切换阀切换至导通所述冷冻节流装置的状态。
可选地，调节所述压缩机的运行频率，直至所述冷冻蒸发器的蒸发器温度和所述冷冻间室内的间室温度之间的温差值大于或等于预设最小温差的步骤包括：
控制所述压缩机以低于其在冷冻间室制冷状态时的第一设定频率的频率运行；
获取所述冷冻蒸发器的蒸发器温度和所述冷冻间室内的间室温度；
计算所述蒸发器温度与所述间室温度之间的温差值；
若所述蒸发器温度与所述间室温度之间的温差值小于所述预设最小温差，则降低所述压缩机的运行频率，并返回继续获取所述冷冻蒸发器的蒸发器温度和所述冷冻间室内的间室温度，直至所述蒸发器温度与所述间室温度之间的温差值大于或等于所述预设最小温差。
可选地，执行冷冻间室加湿操作以将所述冷冻间室内的湿度提高至符合预设条件后再停止所述压缩机和所述冷冻风机的步骤包括：
获取所述冷冻间室内的湿度；
若所述冷冻间室内的湿度高于或等于预设最高湿度，则控制所述压缩机和所述冷冻风机停止运行；
若所述冷冻间室内的湿度低于所述预设最高湿度，则将所述冷冻间室内的湿度提高至所述预设最高湿度后再控制所述压缩机和所述冷冻风机停止运行。
可选地，所述压缩制冷系统还包括与所述压缩机串联连接的冷冻支路，所述冷冻支路包括冷冻蒸发器和冷冻节流装置；
在达到所述自动关机条件之前，所述冷藏冷冻装置处于冷冻间室制冷状态，在所述冷冻间室制冷状态下，所述冷冻风机处于运行状态；且
将所述冷冻间室内的湿度提高至所述预设最高湿度的步骤包括：
保持所述冷冻风机处于运行状态，并控制所述压缩机以低于其在冷冻间室制冷状态时的第一设定频率的频率运行，以使得所述冷冻蒸发器的蒸发器温度高于所述冷冻间室内的间室温度。
可选地，所述箱体内还限定有至少一个非冷冻间室，所述压缩制冷系统还包括与所述压缩机串联连接的冷冻支路，所述冷冻支路包括冷冻蒸发器和冷冻节流装置，所述冷冻节流装置的两端并联有用于分别为所述至少一个非冷冻间室提供冷量的至少一个非冷冻支路，所述压缩制冷系统还包括用于导通所述冷冻节流装置和所述至少一个非冷冻支路中的其中一个支路的切换阀；
在达到所述自动关机条件之前，所述冷藏冷冻装置处于非冷冻间室制冷状态，在所述非冷冻间室制冷状态下，所述冷冻风机处于停止状态；且
将所述冷冻间室内的湿度提高至所述预设最高湿度的步骤包括：
控制所述切换阀切换至导通所述冷冻节流装置的状态；
启动所述冷冻风机；
控制所述压缩机以低于其在冷冻间室制冷状态时的第一设定频率的频率运行，以使 得所述冷冻蒸发器的蒸发器温度高于所述冷冻间室内的间室温度。
可选地，控制所述压缩机以低于其在冷冻间室制冷状态时的第一设定频率的频率运行，以使得所述冷冻蒸发器的蒸发器温度高于所述冷冻间室内的间室温度的步骤包括：
控制所述压缩机以低于其在冷冻间室制冷状态时的第一设定频率的频率运行；
获取所述冷冻蒸发器的蒸发器温度和所述冷冻间室内的间室温度；
计算所述蒸发器温度与所述间室温度之间的温差值；
若所述蒸发器温度与所述间室温度之间的温差值大于或等于预设最小温差，则保持所述压缩机的运行频率不变，并返回继续获取所述冷冻间室内的湿度；
若所述蒸发器温度与所述间室温度之间的温差值小于所述预设最小温差，则降低所述压缩机的运行频率，并返回继续获取所述冷冻蒸发器的蒸发器温度和所述冷冻间室内的间室温度；其中
所述预设最小温差大于零。
可选地，所述预设最高湿度为范围在80％～100％之间的任一相对湿度值。
可选地，所述压缩制冷系统还包括与所述压缩机串联连接的冷冻蒸发器和冷冻节流装置；
执行冷冻间室加湿操作以将所述冷冻间室内的湿度提高至符合预设条件后再停止所述压缩机和所述冷冻风机的步骤包括：
控制所述冷冻风机处于停止状态，控制制冷剂流经所述冷冻节流装置和所述冷冻蒸发器，并控制所述压缩机以预设频率运行，其中，所述预设频率设置成使得所述冷冻蒸发器的蒸发器温度高于所述冷冻间室内的间室温度；
当所述压缩机以所述预设频率运行的时长达到第二预设时长后，停止所述压缩机的运行，并启动所述冷冻风机；
当所述冷冻风机持续运行第一预设时长后停止所述冷冻风机。
可选地，所述预设频率比所述压缩机在冷冻间室制冷状态时的第一设定频率低20～90赫兹。
可选地，所述箱体内还限定有至少一个非冷冻间室，所述冷冻节流装置的两端并联有用于分别为所述至少一个非冷冻间室提供冷量的至少一个非冷冻支路，所述压缩制冷系统还包括用于导通所述冷冻节流装置和所述至少一个非冷冻支路中的其中一个支路的切换阀；
在达到所述自动关机条件之前，所述冷藏冷冻装置处于冷冻间室制冷状态，在所述冷冻间室制冷状态下，所述冷冻风机处于运行状态；且
控制制冷剂流经所述冷冻节流装置和所述冷冻蒸发器的步骤包括：
保持所述切换阀的状态不变；
控制所述冷冻风机处于停止状态的步骤包括：
停止所述冷冻风机。
可选地，所述箱体内还限定有至少一个非冷冻间室，所述冷冻节流装置的两端并联有用于分别为所述至少一个非冷冻间室提供冷量的至少一个非冷冻支路，所述压缩制冷系统还包括用于导通所述冷冻节流装置和所述至少一个非冷冻支路中的其中一个支路的切换阀；
在达到所述自动关机条件之前，所述冷藏冷冻装置处于非冷冻间室制冷状态，在所述非冷冻间室制冷状态下，所述冷冻风机处于停止状态；且
控制制冷剂流经所述冷冻节流装置和所述冷冻蒸发器的步骤包括：
将所述切换阀切换至导通所述冷冻节流装置的状态；
控制所述冷冻风机处于停止状态的步骤包括：
保持所述冷冻风机的停止状态不变。
可选地，所述第二预设时长为范围在1～10min之间的任一时长值。
可选地，所述压缩机的运行频率每次降低的幅度均相同。
可选地，每次以2～20赫兹的幅度降低所述压缩机的运行频率。
可选地，所述预设最小温差为范围在2～4℃之间的任一温差值。
可选地，所述第一预设时长为范围在3～10min之间的任一时长值。
可选地，所述自动关机条件为所述冷藏冷冻装置的每个储物间室的温度均达到其各自的设定温度。
根据本发明的第二方面，本发明还提供一种冷藏冷冻装置，包括限定有冷冻间室的箱体、用于向所述冷冻间室内驱动送风的冷冻风机和压缩制冷系统，所述压缩制冷系统包括压缩机、与所述压缩机串联连接的冷冻蒸发器和冷冻节流装置，所述冷藏冷冻装置还包括：
控制装置，包括处理器和存储器，所述存储器内存储有机器可执行程序，并且所述机器可执行程序被所述处理器执行时用于实现上述任一方案所述的控制方法。
可选地，所述箱体内还限定有至少一个非冷冻间室，所述冷冻节流装置的两端并联有用于分别为所述至少一个非冷冻间室提供冷量的至少一个非冷冻支路，所述压缩制冷系统还包括用于导通所述冷冻节流装置和所述至少一个非冷冻支路中的其中一个支路的切换阀；其中
所述切换阀配置成在所述冷藏冷冻装置达到预设的自动关机条件时受控地保持或切换至导通所述冷冻节流装置的状态。
本发明的控制方法在冷藏冷冻装置达到预设的自动关机条件时不立即停止压缩机，而是先执行冷冻间室加湿操作以将冷冻间室内的湿度提高至符合预设条件后再停机。停机后，冷冻间室内的湿度不再下降，甚至缓慢上升，由此，可以提高了冷冻间室内的平均湿度，避免了冷冻间室内的湿度较低而影响食材保存效果。
进一步地，本发明的控制方法在冷藏冷冻装置达到预设的自动关机条件时不立即停止压缩机，而是先停止冷冻风机，并通过调节压缩机的运行频率使得冷冻蒸发器的蒸发器温度高于冷冻间室内的间室温度，然后再停止压缩机、启动冷冻风机，通过冷冻风机促使气流在冷冻蒸发器和冷冻间室之间循环流动。由于此时冷冻蒸发器的蒸发器温度高于冷冻间室内的间室温度，因此，通过门封进入冷冻间室内的外界水汽、冷冻间室内的水分(例如食材挥发的水分)、以及冷冻蒸发器上的凝霜升华形成的水分会在温度更低的冷冻间室内凝结而不是凝结在冷冻蒸发器处，由此，可有效地提高冷冻间室内的水分含量，提高冷冻间室内的湿度。本发明在冷藏冷冻装置停机之前先提高冷冻间室内的湿度后再停机。停机后，冷冻间室内的湿度不再下降，甚至缓慢上升，由此，可以提高了冷冻间室内的平均湿度，避免了冷冻间室内的湿度较低而影响食材保存效果。
进一步地，本发明的控制方法在冷藏冷冻装置达到预设的自动关机条件时不立即停止压缩机和冷冻风机，而是将冷冻间室内的湿度提高到预设最高湿度后再停止压缩机和冷冻风机。也就是说，在冷藏冷冻装置停机之前先将冷冻间室内的湿度提高到预设最高湿度后再停机。停机后，冷冻间室内的湿度不再下降，甚至缓慢上升，由此，可以在停机期间使得冷冻间室内的湿度维持在预设最高湿度的较高水平，避免了冷冻间室内的湿度较低而影响食材保存效果。
进一步地，本发明通过获取冷冻蒸发器的蒸发器温度和冷冻间室内的间室温度，监测蒸发器温度与间室温度的温差值，逐次地、缓慢地降低压缩机的运行频率，以使得冷冻蒸发器的蒸发器温度大于冷冻间室内的间室温度，既能够使得通过门封进入冷冻间室内的外界水汽、冷冻间室内的水分(例如食材挥发的水分)、冷冻蒸发器上的凝霜升华的水分等保持在冷冻间室内从而简单有效地提高冷冻间室内的湿度，又能够避免压缩机的运行频率一次性降低过多导致冷冻蒸发器的温升过高对冷冻间室的温度产生较大影响。
进一步地，本发明的控制方法根据经验预先设置了一个较低的预设频率，压缩机以 该预设频率运行时，冷冻蒸发器的蒸发器温度高于冷冻间室内的间室温度。在冷藏冷冻装置达到预设的自动关机条件时不立即停止压缩机，而是先停止冷冻风机，并使压缩机以上述预设频率运行第二预设时长后再停止压缩机，此时，冷冻蒸发器的温度已经回升到至少高于冷冻间室的温度，然后再通过启动冷冻风机促使气流在冷冻蒸发器和冷冻间室之间循环流动，因此，通过门封进入冷冻间室内的外界水汽、冷冻间室内的水分(例如食材挥发的水分)、以及冷冻蒸发器上的凝霜升华形成的水分会在温度更低的冷冻间室内凝结而不是凝结在冷冻蒸发器处，由此，可有效地提高冷冻间室内的水分含量，提高冷冻间室内的湿度。本发明在冷藏冷冻装置停机之前先提高冷冻间室内的湿度后再停机。停机后，冷冻间室内的湿度不再下降，甚至缓慢上升，由此，可在停机期间使冷冻间室内维持较高的湿度，提高了冷冻间室内的平均湿度，避免了冷冻间室内的湿度较低而影响食材保存效果。
并且，本发明根据经验预先设置一个较低的预设频率，使得加湿期间压缩机的运行频率恒定，只需要对压缩机以预设频率运行的时长进行监控，简化了控制逻辑。
根据下文结合附图对本发明具体实施例的详细描述，本领域技术人员将会更加明了本发明的上述以及其他目的、优点和特征。
附图说明
后文将参照附图以示例性而非限制性的方式详细描述本发明的一些具体实施例。附图中相同的附图标记标示了相同或类似的部件或部分。本领域技术人员应该理解，这些附图未必是按比例绘制的。附图中：
图1是根据本发明一个实施例的冷藏冷冻装置的示意性结构图；
图2是根据本发明一个实施例的冷藏冷冻装置的压缩制冷系统的示意性结构框图；
图3是根据本发明一个具体实施例的冷藏冷冻装置的控制方法的示意性流程图；
图4是根据本发明另一个具体实施例的冷藏冷冻装置的控制方法的示意性流程图；
图5是根据本发明一个具体实施例的冷藏冷冻装置的控制方法的示意性流程图；
图6是根据本发明一个实施例的将冷冻间室内的湿度提高至预设最高湿度的示意性流程图；
图7是根据本发明另一个实施例的冷藏冷冻装置的控制方法的示意性流程图；
图8是根据本发明又一个具体实施例的冷藏冷冻装置的控制方法的示意性流程图；
图9是根据本发明一个实施例的冷藏冷冻装置的示意性结构框图。
具体实施方式
本发明首先提供一种冷藏冷冻装置的控制方法，图1是根据本发明一个实施例的冷藏冷冻装置的示意性结构图，图2是根据本发明一个实施例的冷藏冷冻装置的压缩制冷系统的示意性结构框图。
参见图1和图2，本发明的冷藏冷冻装置1包括限定有冷冻间室11的箱体10、用于向冷冻间室11内驱动送风的冷冻风机31和包括压缩机21的压缩制冷系统20。进一步地，压缩制冷系统20还包括与压缩机21串联连接的冷凝器29、冷冻蒸发器22和冷冻节流装置23。冷冻蒸发器22和冷冻节流装置23形成冷冻支路。具体地，冷冻节流装置23可以为毛细管或节流阀等。
发明人认识到，在冷冻间室11制冷期间，冷冻蒸发器22的蒸发器温度必然要低于冷冻间室11的间室温度，才具有对冷冻间室11进行降温的能力。而水汽通常会在温度更低的位置聚集、凝结。因此，在冷冻间室11制冷期间，冷冻间室11内的水分会在冷冻蒸发器22处凝结，冷冻间室11内的湿度必然降低。当冷冻间室11内的温度达到设定温度而停机时，冷冻间室11内的温度几乎达到最低，这将拉低冷冻间室11的平均湿度。虽然停机后，冷冻间室11内的湿度会缓慢上升，然而湿度上升的速度较慢，冷冻间室11 内的食材仍然长时间处于湿度较低的环境中，保存品质不佳。
在上述认识的基础上，本发明特别提出了一种冷藏冷冻装置的控制方法，该控制方法包括：
当冷藏冷冻装置1达到预设的自动关机条件时，执行冷冻间室加湿操作以将冷冻间室11内的湿度提高至符合预设条件后再停止压缩机21和冷冻风机31。
本发明的控制方法在冷藏冷冻装置1达到预设的自动关机条件时不立即停止压缩机21，而是先执行冷冻间室加湿操作以将冷冻间室11内的湿度提高至符合预设条件后再停机。停机后，冷冻间室11内的湿度不再下降，甚至缓慢上升，由此，可以提高了冷冻间室11内的平均湿度，避免了冷冻间室11内的湿度较低而影响食材保存效果。
申请人进一步想到，如果冷冻间室11内的间室温度比冷冻蒸发器22处的蒸发器温度低，那么水汽就会聚集在冷冻间室内，利用这一原理可以有效地提高冷冻间室11内的湿度。
在上述认识的基础上，在一些进一步的实施例中，本发明特别提出了一种冷藏冷冻装置的控制方法，该控制方法包括：
当冷藏冷冻装置1达到预设的自动关机条件时，控制冷冻风机31处于停止状态，并控制制冷剂流经冷冻节流装置23和冷冻蒸发器22；
调节压缩机21的运行频率，直至冷冻蒸发器22的蒸发器温度和冷冻间室11内的间室温度之间的温差值大于或等于预设最小温差，预设最小温差大于零；
停止压缩机21的运行，并启动冷冻风机31；
当冷冻风机31持续运行第一预设时长后停止冷冻风机31。
换言之，此实施例中，冷冻间室加湿操作具体包括控制冷冻风机31处于停止状态，并控制制冷剂流经冷冻节流装置23和冷冻蒸发器22，调节压缩机21的运行频率，直至冷冻蒸发器22的蒸发器温度和冷冻间室11内的间室温度之间的温差值大于或等于预设最小温差，停止压缩机21的运行，启动冷冻风机31使其持续运行第一预设时长后停止冷冻风机31。预设条件由冷冻蒸发器22的蒸发器温度和冷冻间室11内的间室温度之间的温差值和冷冻风机31持续运行的时长共同确定。
本发明的控制方法在冷藏冷冻装置1达到预设的自动关机条件时不立即停止压缩机21，而是先停止冷冻风机31，以停止向冷冻间室11内吹送气流，并通过调节压缩机21的运行频率使得冷冻蒸发器22的蒸发器温度高于冷冻间室11内的间室温度，然后再停止压缩机21、启动冷冻风机31，通过冷冻风机31促使气流在冷冻蒸发器22和冷冻间室11之间循环流动。由于此时冷冻蒸发器22的蒸发器温度高于冷冻间室11内的间室温度，因此，通过门封进入冷冻间室11内的外界水汽、冷冻间室11内的水分(例如食材挥发的水分)、以及冷冻蒸发器22上的凝霜升华形成的水分会在温度更低的冷冻间室11内凝结而不是凝结在冷冻蒸发器22处，由此，可有效地提高冷冻间室11内的水分含量，提高冷冻间室11内的湿度。
本发明在冷藏冷冻装置1停机之前先提高冷冻间室11内的湿度后再停机。停机后，冷冻间室11内的湿度不再下降，甚至缓慢上升，由此，可以提高了冷冻间室11内的平均湿度，避免了冷冻间室11内的湿度较低而影响食材保存效果。
同时，只要冷冻蒸发器22的蒸发器温度高于冷冻间室11内的间室温度一定值，冷冻风机31运行时就能够对冷冻间室11起到加湿作用。因此，本发明对冷冻风机31的运行时间进行一定的限制，既能够有效地提高冷冻间室11内的湿度，又不会长时间地将经过冷冻蒸发器22后形成的温度稍高的气流吹送至冷冻间室11导致冷冻间室11温度回升明显。
本发明的控制方法在停机前调节冷冻间室11内的湿度，不需要在停机后再次启动压缩机21进行加湿操作，避免压缩机21启停频繁对其带来的损害。
并且，本发明在冷藏冷冻装置1原有结构的基础上通过对冷冻风机31的启停控制以 及对压缩机21的停机时间及运行频率的控制实现提高冷冻间室11内湿度的目的，不需要增加任何辅助结构，因此，不会对冷藏冷冻装置1的原有结构及储物能力产生任何影响，提高了实际应用的可行性。
图3是根据本发明一个具体实施例的冷藏冷冻装置的控制方法的示意性流程图，参见图3，本发明的控制方法包括：
步骤S10，判断冷藏冷冻装置1是否达到预设的自动关机条件；若是，则转步骤S20，若否，则返回继续判断；
步骤S20，控制冷冻风机31处于停止状态；
步骤S30，控制制冷剂流经冷冻节流装置23和冷冻蒸发器22；
步骤S40，调节压缩机21的运行频率，直至冷冻蒸发器22的蒸发器温度和冷冻间室11内的间室温度之间的温差值大于或等于预设最小温差，预设最小温差大于零；
步骤S50，停止压缩机21的运行，并启动冷冻风机31；
步骤S60，判断冷冻风机31持续运行的时间是否达到第一预设时长；若是，则转步骤S70，若否，则返回继续判断；
步骤S70，停止冷冻风机31。
在一些实施例中，箱体10内还限定有至少一个非冷冻间室，冷冻节流装置23的两端并联有用于分别为至少一个非冷冻间室提供冷量的至少一个非冷冻支路，压缩制冷系统20还包括用于导通冷冻节流装置23和至少一个非冷冻支路中的其中一个支路的切换阀24。
例如，至少一个非冷冻间室可包括冷藏间室12，至少一个非冷冻支路可包括用于为冷藏间室12提供冷量的冷藏支路，冷藏支路包括串联连接的冷藏蒸发器25和冷藏节流装置26，冷藏节流装置26可以为毛细管或节流阀等。至少一个非冷冻间室还可包括变温间室13，至少一个非冷冻支路还可包括用于为变温间室13提供冷量的变温支路，变温支路包括串联连接的变温蒸发器27和变温节流装置28，变温节流装置28可以为毛细管或节流阀等。
当箱体10内同时限定有冷冻间室11、冷藏间室12和变温间室13时，冷藏冷冻装置1通常按照冷藏间室制冷、变温间室制冷和冷冻间室制冷的顺序运行。即在冷冻间室制冷开始时，冷藏间室制冷和变温间室制冷通常已经执行完毕；也就是说，在达到自动关机条件之前，冷藏冷冻装置1通常处于冷冻间室制冷状态。可以理解的是，在冷冻间室11制冷状态下，冷冻风机31处于运行状态，切换阀24处于导通冷冻节流装置23的状态，以使得制冷剂流经冷冻节流装置23和冷冻蒸发器22，从而实现为冷冻间室11制冷的目的。
在这些实施例中，控制制冷剂流经冷冻节流装置23和冷冻蒸发器22的步骤S30具体可包括：
保持切换阀24的状态不变。
也就是说，达到自动关机条件之前，冷藏冷冻装置1处于冷冻间室制冷状态，切换阀24已经处于导通冷冻节流装置23的状态，因此，在达到自动关机条件之后，切换阀24的状态不需要再改变。
在另一些实施例中，在达到自动关机条件之前，冷藏冷冻装置1也可能处于非冷冻间室制冷状态，例如处于冷藏制冷状态或变温制冷状态。在非冷冻间室制冷状态下，冷冻风机31处于停止状态，不向冷冻间室11送风，切换阀24处于导通相应的非冷冻支路的状态，冷冻节流装置23没有制冷剂流过。
在这些实施例中，控制制冷剂流经冷冻节流装置23和冷冻蒸发器22的步骤S30具体可包括：
将切换阀24切换至导通冷冻节流装置23的状态。
也就是说，在达到自动关机条件之前，冷藏冷冻装置1处于非冷冻间室制冷状态时， 在达到自动关机条件之后，需要调节切换阀24的状态，使其处于导通冷冻节流装置23的状态，以便于调节冷冻蒸发器22的蒸发器温度。
在一些实施例中，调节压缩机21的运行频率，直至冷冻蒸发器22的蒸发器温度和冷冻间室11内的间室温度之间的温差值大于或等于预设最小温差的步骤S40具体可包括：
控制压缩机21以低于其在冷冻间室制冷状态时的第一设定频率的频率运行；
获取冷冻蒸发器22的蒸发器温度和冷冻间室11内的间室温度；
计算蒸发器温度与间室温度之间的温差值；
若蒸发器温度与间室温度之间的温差值小于预设最小温差，则降低压缩机21的运行频率，并返回继续获取冷冻蒸发器22的蒸发器温度和冷冻间室11内的间室温度，直至蒸发器温度与间室温度之间的温差值大于或等于预设最小温差。
也就是说，本发明通过获取冷冻蒸发器22的蒸发器温度和冷冻间室11内的间室温度，监测蒸发器温度与间室温度的温差值，逐次地、缓慢地降低压缩机21的运行频率，以使得冷冻蒸发器22的蒸发器温度大于冷冻间室11内的间室温度，既能够简单有效地提高冷冻间室11内的湿度，又能够避免压缩机21的运行频率一次性降低过多导致冷冻蒸发器22的温升过高对冷冻间室11的温度产生较大影响。
具体地，图4是根据本发明另一个具体实施例的冷藏冷冻装置的控制方法的示意性流程图，参见图4，本发明的控制方法包括：
步骤S10，判断冷藏冷冻装置1是否达到预设的自动关机条件；若是，则转步骤S20，若否，则返回继续判断；
步骤S20，控制冷冻风机31处于停止状态；
步骤S30，控制制冷剂流经冷冻节流装置23和冷冻蒸发器22；
步骤S41，控制压缩机21以低于其在冷冻间室制冷状态时的第一设定频率的频率运行；
步骤S42，获取冷冻蒸发器22的蒸发器温度和冷冻间室11内的间室温度；
步骤S43，计算蒸发器温度与间室温度之间的温差值；
步骤S44，判断蒸发器温度与间室温度之间的温差值是否小于预设最小温差；若是，则转步骤S45，若否，则转步骤S50；
步骤S45，降低压缩机21的运行频率，并返回步骤S42；
步骤S50，停止压缩机21的运行，并启动冷冻风机31；
步骤S60，判断冷冻风机31持续运行的时间是否达到第一预设时长；若是，则转步骤S70，若否，则返回继续判断；
步骤S70，停止冷冻风机31。
在一些实施例中，压缩机21的运行频率每次降低的幅度均相同。也就是说，压缩机21的运行频率是均衡地降低的，控制较为简便。
具体地，每次可以2～20赫兹的幅度降低压缩机21的运行频率，以尽可能地找到能够提高冷冻间室11内的湿度且对冷冻间室11内的温度影响最小的压缩机21的运行频率。例如，压缩机21的运行频率每次降低2赫兹、4赫兹、6赫兹、8赫兹10赫兹、12赫兹、14赫兹、16赫兹、18赫兹或20赫兹等等。
在一些实施例中，上述预设最小温差可以为范围在2～4℃之间的任一温差值。例如，预设最小温差可以取值2℃、2.5℃、3℃、3.5℃或4℃。也就是说，当冷冻蒸发器22的蒸发器温度比冷冻间室11内的间室温度高2～4℃时，不但能够在冷冻间室11内取得较好的加湿效果，而且还不会对冷冻间室11内的温度产生较大的影响。
在一些实施例中，第一预设时长可以为范围在3～10min之间的任一时长值。例如，第一预设时长可以为3min、4min、5min、6min、7min、8min、9min或10min。第一预设时长的值过小，即冷冻风机31运行的时间过短，冷冻间室11内的加湿效果不明显；第 一预设时长的值过大，即冷冻风机31运行的时间过长，会导致冷冻间室11内的温度明显回升。因此，本发明将第一预设时长设置成范围在3～10min之间的任一时长值，既能够对冷冻间室11有效加湿，又能够避免冷冻间室11内的温度产生较大波动。
在一些实施例中，上述自动关机条件为冷藏冷冻装置1的每个储物间室的温度均达到其各自的设定温度。
具体地，若冷藏冷冻装置1仅包括冷冻间室11，则自动关机条件为冷冻间室11达到冷冻设定温度。
具体地，若冷藏冷冻装置1除了包括冷冻间室11之外，还包括至少一个非冷冻间室，比如还包括冷藏间室12和变温间室13，则自动关机条件为冷藏间室12达到冷藏设定温度，变温间室13达到变温设定温度，冷冻间室11达到冷冻设定温度。
本发明还提供一种冷藏冷冻装置，图9是根据本发明一个实施例的冷藏冷冻装置的示意性结构框图。参见图1、图2和图9，本发明的冷藏冷冻装置1包括限定有冷冻间室11的箱体10、用于向冷冻间室11内驱动送风的冷冻风机31和具有压缩机21的压缩制冷系统20。
特别地，冷藏冷冻装置1还包括控制装置40，控制装置40包括处理器41和存储器42，存储器42内存储有机器可执行程序43，并且机器可执行程序43被处理器41执行时用于实现上述任一实施例所描述的控制方法。
具体地，压缩机21和冷冻风机31均与控制装置40相连，以在控制装置40的控制下运行。
具体地，处理器41可以是一个中央处理单元(central processing unit，简称CPU)，或者为数字处理单元等等。处理器41通过通信接口收发数据。存储器44用于存储处理器41执行的程序。存储器44是能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何介质，也可以是多个存储器的组合。上述机器可执行程序43可以从计算机可读存储介质下载到相应计算/处理设备或者经由网络(例如因特网、局域网、广域网和/或无线网络)下载到计算机或外部存储设备。
本发明在冷藏冷冻装置1停机之前先提高冷冻间室11内的湿度后再停机。停机后，冷冻间室11内的湿度不再下降，甚至缓慢上升，由此，可以提高了冷冻间室11内的平均湿度，避免了冷冻间室11内的湿度较低而影响食材保存效果。
并且，本发明的冷藏冷冻装置1对冷冻风机31的运行时间进行一定的限制，既能够有效地提高冷冻间室11内的湿度，又不会长时间地将经过冷冻蒸发器22后形成的温度稍高的气流吹送至冷冻间室11导致冷冻间室11温度回升明显。
同时，本发明的控制方法在停机前调节冷冻间室11内的湿度，不需要在停机后再次启动压缩机21进行加湿操作，避免压缩机21启停频繁对其带来的损害。
在另一些进一步的实施例中，本发明特别提出了一种冷藏冷冻装置的控制方法，该控制方法包括：
当冷藏冷冻装置1达到预设的自动关机条件时，获取冷冻间室11内的湿度；
若冷冻间室11内的湿度高于或等于预设最高湿度，则控制压缩机21和冷冻风机31停止运行；也就是说，当冷冻间室11内的湿度高于或等于预设最高湿度时，直接停机；
若冷冻间室11内的湿度低于预设最高湿度，则将冷冻间室11内的湿度提高至预设最高湿度后再控制压缩机21和冷冻风机31停止运行。
换言之，此实施例中，冷冻间室加湿操作具体包括获取冷冻间室11内的湿度，根据冷冻间室11内的湿度对冷冻间室11进行加湿以将冷冻间室11内的湿度提高至预设最高湿度。预设条件为冷冻间室11内的湿度高于或等于预设最高湿度。
本发明的控制方法在冷藏冷冻装置1达到预设的自动关机条件时不立即停止压缩机21和冷冻风机31，而是将冷冻间室11内的湿度提高到预设最高湿度后再停止压缩机21和冷冻风机31。也就是说，在冷藏冷冻装置1停机之前先将冷冻间室11内的湿度提高到 预设最高湿度后再停机。停机后，冷冻间室11内的湿度不再下降，甚至缓慢上升，由此，可以在停机期间使得冷冻间室11内的湿度维持在预设最高湿度的较高水平，避免了停机后冷冻间室11内的湿度较低而影响食材保存效果。
本发明的控制方法在停机前调节冷冻间室11内的湿度，不需要在停机后再次启动压缩机21进行加湿操作，避免压缩机21启停频繁对其带来的损害。
并且，本发明在冷藏冷冻装置1原有结构的基础上通过对压缩机21的停机时间及运行频率的控制实现提高冷冻间室11内湿度的目的，不需要增加任何辅助结构，因此，不会对冷藏冷冻装置1的原有结构及储物能力产生任何影响，提高了实际应用的可行性。
图5是根据本发明一个具体实施例的冷藏冷冻装置的控制方法的示意性流程图，参见图5，本发明的控制方法包括：
步骤S10’，判断冷藏冷冻装置1是否达到预设的自动关机条件；若是，则转步骤S20’，若否，则返回继续判断；
步骤S20’，获取冷冻间室11内的湿度；
步骤S30’，判断冷冻间室11内的湿度是否低于预设最高湿度，若是，则转步骤S40’，若否，则转步骤S50’；
步骤S40’，将冷冻间室11内的湿度提高至预设最高湿度；
步骤S50’，控制压缩机21和冷冻风机31停止运行。
在一些实施例中，在达到自动关机条件之前，冷藏冷冻装置1处于冷冻间室制冷状态；在冷冻间室11制冷状态下，冷冻风机31处于运行状态，制冷剂流经冷冻蒸发器22和冷冻节流装置23。
具体地，若冷藏冷冻装置1仅包括冷冻间室11，则在达到自动关机条件之前，冷藏冷冻装置1必然处于冷冻间室制冷状态。
若冷藏冷冻装置1除了包括冷冻间室11之外，还包括至少一个非冷冻间室，比如还包括冷藏间室和变温间室，则冷藏冷冻装置1通常按照冷藏间室制冷、变温间室制冷和冷冻间室制冷的顺序运行。即在冷冻间室制冷开始时，冷藏间室制冷和变温间室制冷通常已经执行完毕；也就是说，在达到自动关机条件之前，冷藏冷冻装置1通常处于冷冻间室制冷状态。
在这些实施例中，将冷冻间室11内的湿度提高至预设最高湿度的步骤S40’具体可包括：
保持冷冻风机31处于运行状态，并控制压缩机21以低于其在冷冻间室制冷状态时的第一设定频率的频率运行，以使得冷冻蒸发器22的蒸发器温度高于冷冻间室11内的间室温度。
冷冻风机31运行，可促使气流在冷冻蒸发器22和冷冻间室11之间循环流动，由于冷冻蒸发器22的蒸发器温度高于冷冻间室11内的间室温度，因此，通过门封进入冷冻间室11内的外界水汽、冷冻间室11内的水分(例如食材挥发的水分)、以及冷冻蒸发器22上的凝霜升华形成的水分会在温度更低的冷冻间室11内凝结而不是凝结在冷冻蒸发器22处，由此，可有效地提高冷冻间室11内的水分含量，从而将冷冻间室11内的湿度提高至预设最高湿度。
在一些实施例中，箱体10内还限定有至少一个非冷冻间室，压缩制冷系统20还包括与压缩机21串联连接的冷冻支路，冷冻支路包括冷冻蒸发器21和冷冻节流装置23，冷冻节流装置23的两端并联有用于分别为至少一个非冷冻间室提供冷量的至少一个非冷冻支路，压缩制冷系统20还包括用于导通冷冻节流装置23和至少一个非冷冻支路中的其中一个支路的切换阀24。
具体地，至少一个非冷冻间室可包括冷藏间室12，至少一个非冷冻支路可包括用于为冷藏间室12提供冷量的冷藏支路，冷藏支路包括串联连接的冷藏蒸发器25和冷藏节流装置26，冷藏节流装置26可以为毛细管或节流阀等。至少一个非冷冻间室还可包括变 温间室13，至少一个非冷冻支路还可包括用于为变温间室13提供冷量的变温支路，变温支路包括串联连接的变温蒸发器27和变温节流装置28，变温节流装置28可以为毛细管或节流阀等。
在这些实施例中，在达到自动关机条件之前，冷藏冷冻装置1可处于非冷冻间室制冷状态；在非冷冻间室制冷状态下，冷冻风机31处于停止状态；制冷剂流过与该非冷冻间室对应的非冷冻支路。
进一步地，参见图6所示的根据本发明一个实施例的将冷冻间室11内的湿度提高至预设最高湿度的示意性流程图，将冷冻间室11内的湿度提高至预设最高湿度的步骤S40’具体可包括：
步骤S41’，控制切换阀24切换至导通冷冻节流装置23的状态；
步骤S42’，启动冷冻风机31；
步骤S43’，控制压缩机21以低于其在冷冻间室制冷状态时的第一设定频率的频率运行，以使得冷冻蒸发器22的蒸发器温度高于冷冻间室11内的间室温度。
同样地，冷冻风机31运行，可促使气流在冷冻蒸发器22和冷冻间室11之间循环流动，由于冷冻蒸发器22的蒸发器温度高于冷冻间室11内的间室温度，因此，通过门封进入冷冻间室11内的外界水汽、冷冻间室11内的水分(例如食材挥发的水分)、以及冷冻蒸发器22上的凝霜升华形成的水分会在温度更低的冷冻间室11内凝结而不是凝结在冷冻蒸发器22处，由此，可有效地提高冷冻间室11内的水分含量，从而将冷冻间室11内的湿度提高至预设最高湿度。
图7是根据本发明另一个实施例的冷藏冷冻装置的控制方法的示意性流程图。在一些实施例中，控制压缩机21以低于其在冷冻间室制冷状态时的第一设定频率的频率运行，以使得冷冻蒸发器22的蒸发器温度高于冷冻间室11内的间室温度的步骤具体可包括：
步骤S431’，控制压缩机21以低于其在冷冻间室制冷状态时的第一设定频率的频率运行；
步骤S432’，获取冷冻蒸发器22的蒸发器温度和冷冻间室11内的间室温度；
步骤S433’，计算蒸发器温度与间室温度之间的温差值；
步骤S434’，判断蒸发器温度与间室温度之间的温差值是否小于预设最小温差；若是，则转步骤S435’，若否，则转步骤S436’；
步骤S435’，降低压缩机21的运行频率，并返回步骤S432’；
步骤S436’，保持压缩机21的运行频率不变，并返回步骤S20’。
其中，上述预设最小温差大于零。也即是，需确保蒸发器温度与间室温度之间的温差值为正值，即确保冷冻蒸发器22的蒸发器温度大于冷冻间室11内的间室温度。
本发明通过获取冷冻蒸发器22的蒸发器温度和冷冻间室11内的间室温度，监测蒸发器温度与间室温度的温差值，逐次地、缓慢地降低压缩机21的运行频率，以使得冷冻蒸发器22的蒸发器温度大于冷冻间室11内的间室温度，既能够使得水分等保持在冷冻间室内从而提高冷冻间室内的湿度，又能够避免压缩机21的运行频率一次性降低过多导致冷冻蒸发器的22温升过高对冷冻间室11的温度产生较大影响。
在一些实施例中，上述预设最小温差可以为范围在2～4℃之间的任一温差值。例如，预设最小温差可以取值2℃、2.5℃、3℃、3.5℃或4℃。也就是说，当冷冻蒸发器22的蒸发器温度比冷冻间室11内的间室温度高2～4℃时，不但能够在冷冻间室11内取得较好的加湿效果，而且还不会对冷冻间室11内的温度产生较大的影响。
在一些实施例中，压缩机21的运行频率每次降低的幅度均相同。也就是说，压缩机21的运行频率是均衡地降低的，控制较为简便。
具体地，每次可以2～20赫兹的幅度降低压缩机21的运行频率，以尽可能地找到能够提高冷冻间室11内的湿度且对冷冻间室11内的温度影响最小的压缩机21的运行频率。例如，压缩机21的运行频率每次降低2赫兹、4赫兹、6赫兹、8赫兹10赫兹、12赫兹、 14赫兹、16赫兹、18赫兹或20赫兹等等。
在一些实施例中，上述预设最高湿度可以为范围在80％～100％之间的任一相对湿度值。例如，预设最高湿度可以取值为80％、81％、82％、83％、84％、85％、86％、87％、88％、89％、90％、91％、92％、93％、94％、95％、96％、97％、98％、98％或100％。也就是说，在停机之前，需要将冷冻间室11内的湿度提高至80％以上的较高水平再停机，以确保冷冻间室11内的湿度在停机期间稳定地维持在较高的水平。
在一些实施例中，上述自动关机条件为冷藏冷冻装置1的每个储物间室的温度均达到其各自的设定温度。
具体地，若冷藏冷冻装置1仅包括冷冻间室11，则自动关机条件为冷冻间室11达到冷冻设定温度。
具体地，若冷藏冷冻装置1除了包括冷冻间室11之外，还包括至少一个非冷冻间室，比如还包括冷藏间室12和变温间室13，则自动关机条件为冷藏间室12达到冷藏设定温度，变温间室13达到变温设定温度，冷冻间室11达到冷冻设定温度。
本发明还提供一种冷藏冷冻装置。参见图1、图2和图9，本发明的冷藏冷冻装置1包括限定有冷冻间室11的箱体10、用于向冷冻间室11内驱动送风的冷冻风机31和具有压缩机21的压缩制冷系统20。
特别地，冷藏冷冻装置1还包括控制装置40，控制装置40包括处理器41和存储器42，存储器42内存储有机器可执行程序43，并且机器可执行程序43被处理器41执行时用于实现上述任一实施例所描述的控制方法。
具体地，压缩机21和冷冻风机31均与控制装置40相连，以在控制装置40的控制下运行。
本发明的冷藏冷冻装置1在达到预设的自动关机条件时不立即停止压缩机21和冷冻风机31，而是将冷冻间室11内的湿度提高到预设最高湿度后再停止压缩机21和冷冻风机31。也就是说，在冷藏冷冻装置1停机之前先将冷冻间室11内的湿度提高到预设最高湿度后再停机。停机后，冷冻间室11内的湿度不再下降，甚至缓慢上升，由此，可以在停机期间使得冷冻间室11内的湿度维持在预设最高湿度的较高水平，避免了停机后冷冻间室11内的湿度较低而影响食材保存效果。
本发明的冷藏冷冻装置1在停机前调节冷冻间室11内的湿度，不需要在停机后再次启动压缩机21进行加湿操作，避免压缩机21启停频繁对其带来的损害。
并且，本发明在冷藏冷冻装置1原有结构的基础上通过对压缩机21的停机时间及运行频率的控制实现提高冷冻间室11内湿度的目的，不需要增加任何辅助结构，因此，不会对冷藏冷冻装置1的原有结构及储物能力产生任何影响，提高了实际应用的可行性。
申请人还进一步想到，如果将压缩机21的运行频率降低至低于压缩机21在冷冻间室制冷状态时的第一设定频率的某一较低频率时，冷冻蒸发器22的温度会升高至高于冷冻间室11的温度，那么水汽就会聚集在冷冻间室11内，利用这一原理可以有效地对冷冻间室11进行保湿或提高冷冻间室11内的湿度。
在上述认识的基础上，在另一些进一步的实施例中，本发明特别提出了一种冷藏冷冻装置的控制方法，该控制方法包括：
当冷藏冷冻装置1达到预设的自动关机条件时，控制冷冻风机31处于停止状态，控制制冷剂流经冷冻节流装置23和冷冻蒸发器22，并控制压缩机21以预设频率运行。其中，该预设频率设置成使得冷冻蒸发器22的蒸发器温度高于冷冻间室11内的间室温度；
当压缩机21以预设频率运行的时长达到第二预设时长后，停止压缩机21的运行，并启动冷冻风机31；
当冷冻风机31持续运行第一预设时长后停止冷冻风机31。
本发明的控制方法根据经验预先设置了一个较低的预设频率，压缩机21以该预设频率运行时，冷冻蒸发器22的蒸发器温度高于冷冻间室11内的间室温度。在冷藏冷冻装 置1达到预设的自动关机条件时不立即停止压缩机21，而是先停止冷冻风机31，并使压缩机21以上述预设频率运行第二预设时长后再停止压缩机21。此时，冷冻蒸发器22的温度已经回升到至少高于冷冻间室11的温度，然后再通过启动冷冻风机31促使气流在冷冻蒸发器22和冷冻间室11之间循环流动，因此，通过门封进入冷冻间室11内的外界水汽、冷冻间室11内的水分(例如食材挥发的水分)、以及冷冻蒸发器22上的凝霜升华形成的水分会在温度更低的冷冻间室内凝结而不是凝结在冷冻蒸发器处，由此，可有效地提高冷冻间室11内的水分含量，提高冷冻间室11内的湿度。
本发明在冷藏冷冻装置1停机之前先提高冷冻间室11内的湿度后再停机。停机后，冷冻间室11内的湿度不再下降，甚至缓慢上升，由此，可在停机期间使冷冻间室11内维持较高的湿度，提高了冷冻间室11内的平均湿度，避免了冷冻间室11内的湿度较低而影响食材保存效果。
并且，本发明根据经验预先设置一个较低的预设频率，使得加湿期间压缩机的运行频率恒定，只需要对压缩机21以预设频率运行的时长进行监控，简化了控制逻辑。
同时，只要冷冻蒸发器22的蒸发器温度高于冷冻间室11内的间室温度一定值，冷冻风机31运行时就能够对冷冻间室11起到加湿作用。因此，本发明在压缩机21以预设频率运行第二预设时长后，启动冷冻风机31并对冷冻风机31的运行时间进行一定的限制，既能够有效地提高冷冻间室11内的湿度，又不会长时间地将经过冷冻蒸发器22后形成的温度稍高的气流吹送至冷冻间室11导致冷冻间室11温度回升明显。
本发明的控制方法在停机前调节冷冻间室11内的湿度，不需要在停机后再次启动压缩机21进行加湿操作，避免压缩机21启停频繁对其带来的损害。
本发明在冷藏冷冻装置1原有结构的基础上通过对冷冻风机31和压缩机21的运行时长进行控制实现提高冷冻间室11内湿度的目的，不需要增加任何辅助结构，因此，不会对冷藏冷冻装置1的原有结构及储物能力产生任何影响，提高了实际应用的可行性。
图8是根据本发明又一个具体实施例的冷藏冷冻装置的控制方法的示意性流程图，参见图8，本发明的控制方法包括：
步骤S10”，判断冷藏冷冻装置1是否达到预设的自动关机条件；若是，则转步骤S20”，若否，则返回继续判断；
步骤S20”，控制冷冻风机31处于停止状态，控制制冷剂流经冷冻节流装置23和冷冻蒸发器22，并控制压缩机21以预设频率运行；
步骤S30”，判断压缩机21以预设频率运行的时间是否达到第二预设时长；若是，则转步骤S40”，若否，则返回继续判断；
步骤S40”，停止压缩机21的运行，并启动冷冻风机31；
步骤S50”，判断冷冻风机31持续运行的时间是否达到第一预设时长；若是，则转步骤S60”，若否，则返回继续判断；
步骤S60”，停止冷冻风机31。
在一些实施例中，上述预设频率比压缩机21在冷冻间室制冷状态时的第一设定频率低20～90赫兹。例如，上述预设频率可比第一设定频率低20赫兹、30赫兹、40赫兹、50赫兹、60赫兹、70赫兹、80赫兹或90赫兹。
具体地，当冷藏冷冻装置1处于冷冻间室制冷状态时，压缩机21以第一设定频率运行。当冷藏冷冻装置1达到自动关机条件时，压缩机21以低于第一预设频率20～90赫兹的预设频率运行，可确保冷冻蒸发器22的蒸发器温度高于冷冻间室11的间室温度。
可以理解的是，预设频率的取值不易过低，也不易过高。预设频率的取值过低，冷冻蒸发器22的蒸发器温度过高，当冷冻风机31运行时，将温度较高的气流吹向冷冻间室11导致冷冻间室11的温度明显回升，影响食材的保存效果。预设频率的取值过高，冷冻蒸发器22的蒸发器温度过低，不能够确保蒸发器温度高于冷冻间室11的温度，就不能有效地对冷冻间室11进行加湿。
在一些实施例中，第二预设时长可以为范围在1～10min之间的任一时长值。例如，第一预设时长可以为1min、2min、3min、4min、5min、6min、7min、8min、9min或10min。
压缩机21以预设频率运行1～10min，可以确保冷冻蒸发器22的蒸发器温度升高至高于冷冻间室11的温度，从而在冷冻风机31启动运行时有效地对冷冻间室11进行加湿。若压缩机21以预设频率运行的时长过短，冷冻蒸发器22的蒸发器温度可能还未升上来，若压缩机21以预设频率运行的时长过长，则会浪费能耗。
在一些实施例中，箱体10内还限定有至少一个非冷冻间室，冷冻节流装置23的两端并联有用于分别为至少一个非冷冻间室提供冷量的至少一个非冷冻支路，压缩制冷系统20还包括用于导通冷冻节流装置23和至少一个非冷冻支路中的其中一个支路的切换阀24。
例如，至少一个非冷冻间室可包括冷藏间室12，至少一个非冷冻支路可包括用于为冷藏间室12提供冷量的冷藏支路，冷藏支路包括串联连接的冷藏蒸发器25和冷藏节流装置26，冷藏节流装置26可以为毛细管或节流阀等。至少一个非冷冻间室还可包括变温间室13，至少一个非冷冻支路还可包括用于为变温间室13提供冷量的变温支路，变温支路包括串联连接的变温蒸发器27和变温节流装置28，变温节流装置28可以为毛细管或节流阀等。
当箱体10内同时限定有冷冻间室11、冷藏间室12和变温间室13时，冷藏冷冻装置1通常按照冷藏间室制冷、变温间室制冷和冷冻间室制冷的顺序运行。即在冷冻间室制冷开始时，冷藏间室制冷和变温间室制冷通常已经执行完毕；也就是说，在达到自动关机条件之前，冷藏冷冻装置1通常处于冷冻间室制冷状态。可以理解的是，在冷冻间室11制冷状态下，冷冻风机31处于运行状态，切换阀24处于导通冷冻节流装置23的状态，以使得制冷剂流经冷冻节流装置23和冷冻蒸发器22，从而实现为冷冻间室11制冷的目的。
在这些实施例中，控制制冷剂流经冷冻节流装置23和冷冻蒸发器22的步骤S20”具体可包括：
保持切换阀24的状态不变。
控制冷冻风机31处于停止状态的步骤包括：
停止冷冻风机31。
也就是说，达到自动关机条件之前，冷藏冷冻装置1处于冷冻间室制冷状态，切换阀24已经处于导通冷冻节流装置23的状态，冷冻风机31处于运行状态。因此，在达到自动关机条件之后，切换阀24的状态不需要再改变，只需要停止冷冻风机31即可。
在另一些实施例中，在达到自动关机条件之前，冷藏冷冻装置1也可能处于非冷冻间室制冷状态，例如处于冷藏制冷状态或变温制冷状态。在非冷冻间室制冷状态下，冷冻风机31处于停止状态，不向冷冻间室11送风，切换阀24处于导通相应的非冷冻支路的状态，冷冻节流装置23没有制冷剂流过。
在这些实施例中，控制制冷剂流经冷冻节流装置23和冷冻蒸发器22的步骤S20”具体可包括：
将切换阀24切换至导通冷冻节流装置23的状态。
控制冷冻风机31处于停止状态的步骤包括：
保持冷冻风机31的停止状态不变。
也就是说，在达到自动关机条件之前，冷藏冷冻装置1处于非冷冻间室制冷状态时，冷冻风机31已经处于停止状态，切换阀24导通的是非冷冻支路。因此，在达到自动关机条件之后，不需要改变冷冻风机31的状态，只需要调节切换阀24的状态，使其处于导通冷冻节流装置23的状态，以便于调节冷冻蒸发器22的蒸发器温度。
在一些实施例中，第一预设时长可以为范围在3～10min之间的任一时长值。例如，第二预设时长可以为3min、4min、5min、6min、7min、8min、9min或10min。第一预设 时长的值过小，即冷冻风机31运行的时间过短，冷冻间室11内的加湿效果不明显；第一预设时长的值过大，即冷冻风机31运行的时间过长，会导致冷冻间室11内的温度明显回升。因此，本发明将第一预设时长设置成范围在3～10min之间的任一时长值，既能够对冷冻间室11有效加湿，又能够避免冷冻间室11内的温度产生较大波动。
在一些实施例中，上述自动关机条件为冷藏冷冻装置1的每个储物间室的温度均达到其各自的设定温度。
具体地，若冷藏冷冻装置1仅包括冷冻间室11，则自动关机条件为冷冻间室11达到冷冻设定温度。
具体地，若冷藏冷冻装置1除了包括冷冻间室11之外，还包括至少一个非冷冻间室，比如还包括冷藏间室12和变温间室13，则自动关机条件为冷藏间室12达到冷藏设定温度，变温间室13达到变温设定温度，冷冻间室11达到冷冻设定温度。
本发明还提供一种冷藏冷冻装置，。参见图1、图2和图9，本发明的冷藏冷冻装置1包括限定有冷冻间室11的箱体10、用于向冷冻间室11内驱动送风的冷冻风机31和压缩制冷系统20。压缩制冷系统20包括压缩机21、与压缩机21串联连接的冷冻蒸发器22和冷冻节流装置23。
特别地，冷藏冷冻装置1还包括控制装置40，控制装置40包括处理器41和存储器42，存储器42内存储有机器可执行程序43，并且机器可执行程序43被处理器41执行时用于实现上述任一实施例所描述的控制方法。
具体地，压缩机21和冷冻风机31均与控制装置40相连，以在控制装置40的控制下运行。
本发明的冷藏冷冻装置1在停机之前先提高冷冻间室11内的湿度后再停机。停机后，冷冻间室11内的湿度不再下降，甚至缓慢上升，由此，可在停机期间使冷冻间室11内维持较高的湿度，提高了冷冻间室11内的平均湿度，避免了冷冻间室11内的湿度较低而影响食材保存效果。
并且，本发明根据经验预先设置一个较低的预设频率，使得加湿期间压缩机的运行频率恒定，只需要对压缩机21以预设频率运行的时长进行监控，简化了控制逻辑。
同时，只要冷冻蒸发器22的蒸发器温度高于冷冻间室11内的间室温度一定值，冷冻风机31运行时就能够对冷冻间室11起到加湿作用。因此，本发明在压缩机21以预设频率运行第二预设时长后，启动冷冻风机31并对冷冻风机31的运行时间进行一定的限制，既能够有效地提高冷冻间室11内的湿度，又不会长时间地将经过冷冻蒸发器22后形成的温度稍高的气流吹送至冷冻间室11导致冷冻间室11温度回升明显。
本发明的控制方法在停机前调节冷冻间室11内的湿度，不需要在停机后再次启动压缩机21进行加湿操作，避免压缩机21启停频繁对其带来的损害。
在一些实施例中，箱体10内还限定有至少一个非冷冻间室，冷冻节流装置23的两端并联有用于分别为至少一个非冷冻间室提供冷量的至少一个非冷冻支路，压缩制冷系统20还包括用于导通冷冻节流装置23和至少一个非冷冻支路中的其中一个支路的切换阀24。切换阀24配置成在冷藏冷冻装置1达到预设的自动关机条件时受控地保持或切换至导通冷冻节流装置23的状态。
本领域技术人员应理解，本发明的冷藏冷冻装置1也可以不限制为图1所示的三开门冰箱，其还可以为单开门冰箱、双开门冰箱或其他具有冷冻间室的冰箱。
本领域技术人员还应理解，本发明的冷藏冷冻装置1不但包括冰箱，而且还包括冷柜、冰柜或其他至少具有冷冻功能的冷藏冷冻装置。
至此，本领域技术人员应认识到，虽然本文已详尽示出和描述了本发明的多个示例性实施例，但是，在不脱离本发明精神和范围的情况下，仍可根据本发明公开的内容直接确定或推导出符合本发明原理的许多其他变型或修改。因此，本发明的范围应被理解和认定为覆盖了所有这些其他变型或修改。

Claims (23)

  1. 一种冷藏冷冻装置的控制方法，所述冷藏冷冻装置包括限定有冷冻间室的箱体、用于向所述冷冻间室内驱动送风的冷冻风机和包括压缩机的压缩制冷系统；所述控制方法包括：
    当所述冷藏冷冻装置达到预设的自动关机条件时，执行冷冻间室加湿操作以将所述冷冻间室内的湿度提高至符合预设条件后再停止所述压缩机和所述冷冻风机。
  2. 根据权利要求1所述的控制方法，其中，所述压缩制冷系统还包括与所述压缩机串联连接的冷冻蒸发器和冷冻节流装置；
    执行冷冻间室加湿操作以将所述冷冻间室内的湿度提高至符合预设条件后再停止所述压缩机和所述冷冻风机的步骤包括：
    控制所述冷冻风机处于停止状态，并控制制冷剂流经所述冷冻节流装置和所述冷冻蒸发器；
    调节所述压缩机的运行频率，直至所述冷冻蒸发器的蒸发器温度和所述冷冻间室内的间室温度之间的温差值大于或等于预设最小温差，所述预设最小温差大于零；
    停止所述压缩机的运行，并启动所述冷冻风机；
    当所述冷冻风机持续运行第一预设时长后停止所述冷冻风机。
  3. 根据权利要求2所述的控制方法，其中，所述箱体内还限定有至少一个非冷冻间室，所述冷冻节流装置的两端并联有用于分别为所述至少一个非冷冻间室提供冷量的至少一个非冷冻支路，所述压缩制冷系统还包括用于导通所述冷冻节流装置和所述至少一个非冷冻支路中的其中一个支路的切换阀；
    在达到所述自动关机条件之前，所述冷藏冷冻装置处于冷冻间室制冷状态，在所述冷冻间室制冷状态下，所述冷冻风机处于运行状态；且
    控制制冷剂流经所述冷冻节流装置和所述冷冻蒸发器的步骤包括：
    保持所述切换阀的状态不变。
  4. 根据权利要求2所述的控制方法，其中，所述箱体内还限定有至少一个非冷冻间室，所述冷冻节流装置的两端并联有用于分别为所述至少一个非冷冻间室提供冷量的至少一个非冷冻支路，所述压缩制冷系统还包括用于导通所述冷冻节流装置和所述至少一个非冷冻支路中的其中一个支路的切换阀；
    在达到所述自动关机条件之前，所述冷藏冷冻装置处于非冷冻间室制冷状态，在所述非冷冻间室制冷状态下，所述冷冻风机处于停止状态；且
    控制制冷剂流经所述冷冻节流装置和所述冷冻蒸发器的步骤包括：
    将所述切换阀切换至导通所述冷冻节流装置的状态。
  5. 根据权利要求2所述的控制方法，其中，调节所述压缩机的运行频率，直至所述冷冻蒸发器的蒸发器温度和所述冷冻间室内的间室温度之间的温差值大于或等于预设最小温差的步骤包括：
    控制所述压缩机以低于其在冷冻间室制冷状态时的第一设定频率的频率运行；
    获取所述冷冻蒸发器的蒸发器温度和所述冷冻间室内的间室温度；
    计算所述蒸发器温度与所述间室温度之间的温差值；
    若所述蒸发器温度与所述间室温度之间的温差值小于所述预设最小温差，则降低所述压缩机的运行频率，并返回继续获取所述冷冻蒸发器的蒸发器温度和所述冷冻间室内的间室温度，直至所述蒸发器温度与所述间室温度之间的温差值大于或等于所述预设最小温差。
  6. 根据权利要求1所述的控制方法，其中，执行冷冻间室加湿操作以将所述冷冻间室内的湿度提高至符合预设条件后再停止所述压缩机和所述冷冻风机的步骤包括：
    获取所述冷冻间室内的湿度；
    若所述冷冻间室内的湿度高于或等于预设最高湿度，则控制所述压缩机和所述冷冻风机停止运行；
    若所述冷冻间室内的湿度低于所述预设最高湿度，则将所述冷冻间室内的湿度提高至所述预设最高湿度后再控制所述压缩机和所述冷冻风机停止运行。
  7. 根据权利要求6所述的控制方法，其中，所述压缩制冷系统还包括与所述压缩机串联连接的冷冻支路，所述冷冻支路包括冷冻蒸发器和冷冻节流装置；
    在达到所述自动关机条件之前，所述冷藏冷冻装置处于冷冻间室制冷状态，在所述冷冻间室制冷状态下，所述冷冻风机处于运行状态；且
    将所述冷冻间室内的湿度提高至所述预设最高湿度的步骤包括：
    保持所述冷冻风机处于运行状态，并控制所述压缩机以低于其在冷冻间室制冷状态时的第一设定频率的频率运行，以使得所述冷冻蒸发器的蒸发器温度高于所述冷冻间室内的间室温度。
  8. 根据权利要求6所述的控制方法，其中，所述箱体内还限定有至少一个非冷冻间室，所述压缩制冷系统还包括与所述压缩机串联连接的冷冻支路，所述冷冻支路包括冷冻蒸发器和冷冻节流装置，所述冷冻节流装置的两端并联有用于分别为所述至少一个非冷冻间室提供冷量的至少一个非冷冻支路，所述压缩制冷系统还包括用于导通所述冷冻节流装置和所述至少一个非冷冻支路中的其中一个支路的切换阀；
    在达到所述自动关机条件之前，所述冷藏冷冻装置处于非冷冻间室制冷状态，在所述非冷冻间室制冷状态下，所述冷冻风机处于停止状态；且
    将所述冷冻间室内的湿度提高至所述预设最高湿度的步骤包括：
    控制所述切换阀切换至导通所述冷冻节流装置的状态；
    启动所述冷冻风机；
    控制所述压缩机以低于其在冷冻间室制冷状态时的第一设定频率的频率运行，以使得所述冷冻蒸发器的蒸发器温度高于所述冷冻间室内的间室温度。
  9. 根据权利要求7或8所述的控制方法，其中，控制所述压缩机以低于其在冷冻间室制冷状态时的第一设定频率的频率运行，以使得所述冷冻蒸发器的蒸发器温度高于所述冷冻间室内的间室温度的步骤包括：
    控制所述压缩机以低于其在冷冻间室制冷状态时的第一设定频率的频率运行；
    获取所述冷冻蒸发器的蒸发器温度和所述冷冻间室内的间室温度；
    计算所述蒸发器温度与所述间室温度之间的温差值；
    若所述蒸发器温度与所述间室温度之间的温差值大于或等于预设最小温差，则保持所述压缩机的运行频率不变，并返回继续获取所述冷冻间室内的湿度；
    若所述蒸发器温度与所述间室温度之间的温差值小于所述预设最小温差，则降低所述压缩机的运行频率，并返回继续获取所述冷冻蒸发器的蒸发器温度和所述冷冻间室内的间室温度；其中
    所述预设最小温差大于零。
  10. 根据权利要求6-9中任一项所述的控制方法，其中，所述预设最高湿度为范围在80％～100％之间的任一相对湿度值。
  11. 根据权利要求1所述的控制方法，其中，所述压缩制冷系统还包括与所述压缩机串联连接的冷冻蒸发器和冷冻节流装置；
    执行冷冻间室加湿操作以将所述冷冻间室内的湿度提高至符合预设条件后再停止所述压缩机和所述冷冻风机的步骤包括：
    控制所述冷冻风机处于停止状态，控制制冷剂流经所述冷冻节流装置和所述冷冻蒸发器，并控制所述压缩机以预设频率运行，其中，所述预设频率设置成使得所述冷冻蒸发器的蒸发器温度高于所述冷冻间室内的间室温度；
    当所述压缩机以所述预设频率运行的时长达到第二预设时长后，停止所述压缩机的 运行，并启动所述冷冻风机；
    当所述冷冻风机持续运行第一预设时长后停止所述冷冻风机。
  12. 根据权利要求11所述的控制方法，其中，所述预设频率比所述压缩机在冷冻间室制冷状态时的第一设定频率低20～90赫兹。
  13. 根据权利要求11所述的控制方法，其中，所述箱体内还限定有至少一个非冷冻间室，所述冷冻节流装置的两端并联有用于分别为所述至少一个非冷冻间室提供冷量的至少一个非冷冻支路，所述压缩制冷系统还包括用于导通所述冷冻节流装置和所述至少一个非冷冻支路中的其中一个支路的切换阀；
    在达到所述自动关机条件之前，所述冷藏冷冻装置处于冷冻间室制冷状态，在所述冷冻间室制冷状态下，所述冷冻风机处于运行状态；且
    控制制冷剂流经所述冷冻节流装置和所述冷冻蒸发器的步骤包括：
    保持所述切换阀的状态不变；
    控制所述冷冻风机处于停止状态的步骤包括：
    停止所述冷冻风机。
  14. 根据权利要求11所述的控制方法，其中，所述箱体内还限定有至少一个非冷冻间室，所述冷冻节流装置的两端并联有用于分别为所述至少一个非冷冻间室提供冷量的至少一个非冷冻支路，所述压缩制冷系统还包括用于导通所述冷冻节流装置和所述至少一个非冷冻支路中的其中一个支路的切换阀；
    在达到所述自动关机条件之前，所述冷藏冷冻装置处于非冷冻间室制冷状态，在所述非冷冻间室制冷状态下，所述冷冻风机处于停止状态；且
    控制制冷剂流经所述冷冻节流装置和所述冷冻蒸发器的步骤包括：
    将所述切换阀切换至导通所述冷冻节流装置的状态；
    控制所述冷冻风机处于停止状态的步骤包括：
    保持所述冷冻风机的停止状态不变。
  15. 根据权利要求11-14中任一项所述的控制方法，其中，所述第二预设时长为范围在1～10min之间的任一时长值。
  16. 根据权利要求5或9所述的控制方法，其中，
    所述压缩机的运行频率每次降低的幅度均相同。
  17. 根据权利要求16所述的控制方法，其中，
    每次以2～20赫兹的幅度降低所述压缩机的运行频率。
  18. 根据权利要求2或9所述的控制方法，其中，
    所述预设最小温差为范围在2～4℃之间的任一温差值。
  19. 根据权利要求2或11所述的控制方法，其中，
    所述第一预设时长为范围在3～10min之间的任一时长值。
  20. 根据权利要求1所述的控制方法，其中，
    所述自动关机条件为所述冷藏冷冻装置的每个储物间室的温度均达到其各自的设定温度。
  21. 根据权利要求3、4、8、13和14中任一项所述的控制方法，其中
    所述至少一个非冷冻间室包括冷藏间室，所述至少一个非冷冻支路包括冷藏支路，所述冷藏支路包括串联连接的冷藏毛细管和冷藏蒸发器；且/或
    所述至少一个非冷冻间室包括变温间室，所述至少一个非冷冻支路包括变温支路，所述变温支路包括串联连接的变温毛细管和变温蒸发器。
  22. 一种冷藏冷冻装置，包括限定有冷冻间室的箱体、用于向所述冷冻间室内驱动送风的冷冻风机和压缩制冷系统，所述压缩制冷系统包括压缩机、与所述压缩机串联连接的冷冻蒸发器和冷冻节流装置，所述冷藏冷冻装置还包括：
    控制装置，包括处理器和存储器，所述存储器内存储有机器可执行程序，并且所述 机器可执行程序被所述处理器执行时用于实现根据权利要求1-21中任一所述的控制方法。
  23. 根据权利要求22所述的冷藏冷冻装置，其中，
    所述箱体内还限定有至少一个非冷冻间室，所述冷冻节流装置的两端并联有用于分别为所述至少一个非冷冻间室提供冷量的至少一个非冷冻支路，所述压缩制冷系统还包括用于导通所述冷冻节流装置和所述至少一个非冷冻支路中的其中一个支路的切换阀；其中
    所述切换阀配置成在所述冷藏冷冻装置达到预设的自动关机条件时受控地保持或切换至导通所述冷冻节流装置的状态。
PCT/CN2023/070735 2022-01-13 2023-01-05 冷藏冷冻装置及其控制方法 WO2023134541A1 (zh)

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