WO2023142952A1 - 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
WO2023142952A1
WO2023142952A1 PCT/CN2023/070734 CN2023070734W WO2023142952A1 WO 2023142952 A1 WO2023142952 A1 WO 2023142952A1 CN 2023070734 W CN2023070734 W CN 2023070734W WO 2023142952 A1 WO2023142952 A1 WO 2023142952A1
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WO
WIPO (PCT)
Prior art keywords
compartment
refrigerated
freezing
evaporator
refrigerating
Prior art date
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PCT/CN2023/070734
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English (en)
French (fr)
Inventor
崔展鹏
王少一
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 CN202210088179.5A external-priority patent/CN116538735A/zh
Priority claimed from CN202210089403.2A external-priority patent/CN116538736A/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 WO2023142952A1 publication Critical patent/WO2023142952A1/zh

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/20Disposition of valves, e.g. of on-off valves or flow control valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/30Expansion means; Dispositions thereof
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/40Fluid line arrangements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D11/00Self-contained movable devices, e.g. domestic refrigerators
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D29/00Arrangement or mounting of control or safety devices

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.
  • the humidity in the freezer is low, and the moisture loss of meat and other ingredients stored in the freezer for a long time is serious, and the storage effect is poor, which will not only affect the taste of the ingredients, but also cause the loss of nutrition of the ingredients 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 to provide a control method of a refrigerating and freezing device that can moisturize or humidify the refrigerating compartment without adding a complicated humidifying device in the refrigerating and freezing device .
  • a further object of the first aspect of the present invention is to moisturize or humidify the refrigerated compartment while satisfying the cooling requirements of the non-refrigerated compartment.
  • a still further object of the first aspect of the present invention is to increase the humidification efficiency of the refrigerated compartment without unduly affecting the temperature of the refrigerated compartment.
  • Another further object of the first aspect of the present invention is to moisturize or humidify the refrigerated compartment with less impact on the cooling efficiency of the non-refrigerated compartment.
  • Another yet further object of the first aspect of the present invention is to avoid large fluctuations in humidity in the freezer compartment.
  • the object of the second aspect of the present invention is to provide a refrigerator-freezer capable of moisturizing or humidifying a freezer compartment without adding a complicated humidifying device in the refrigerator-freezer.
  • the present invention provides a control method for a refrigerating and freezing device, the refrigerating and freezing device includes a box body and a compression refrigeration system, the box body defines a freezing compartment and at least one non-refrigerating compartment,
  • the compression refrigeration system includes a compressor, a condenser, a refrigerating throttling device and a refrigerating evaporator which are sequentially connected in series, and two ends of the refrigerating throttling device are connected in parallel to provide refrigeration for the at least one non-refrigerated compartment respectively.
  • the compression refrigeration system also includes a circuit for selectively conducting the freezing throttling device, the at least one non-refrigerating A branch circuit and one or more first switching valves in the pipeline; the control method includes:
  • the first switch valve is adjusted to at least conduct the pipeline so that the refrigerant will A less throttled state of the refrigerated evaporator to raise the evaporator temperature of the refrigerated evaporator above the compartment temperature in the refrigerated compartment.
  • said pipeline is a throttling branch with an additional throttling valve
  • the first switch valve is adjusted to at least conduct the pipeline so that the refrigerant will
  • the steps for a less throttled state include:
  • the first switching valve is adjusted to conduct the throttling branch and the non-refrigerated branch corresponding to the non-refrigerated compartment in the cooling state at the same time status.
  • control method further includes:
  • the opening of the additional throttle valve is increased so that the refrigerated a temperature difference between an evaporator temperature of the evaporator and a compartment temperature within the freezing compartment reaches the first preset minimum temperature difference;
  • the first preset minimum temperature difference is greater than zero.
  • the refrigerating and freezing device further includes a refrigerating fan for driving air supply to the refrigerating compartment; and the control method further includes:
  • the refrigerated fan is activated to promote air flow in the refrigerated evaporator and circulating flow between the freezer compartments.
  • control method further includes:
  • the opening of the additional throttle valve is gradually reduced until the compartment temperature in the freezer compartment is equal to that of the freezer evaporator.
  • the opening of the additional throttle valve remains unchanged, wherein the second preset minimum temperature difference is greater than zero.
  • the pipeline is a straight-through pipeline without throttling
  • the first switch valve is adjusted to at least conduct the pipeline so that the refrigerant will
  • the steps for a less throttled state include:
  • the first switching valve When the humidity of the compartment in the freezing compartment is lower than the preset minimum humidity, adjust the first switching valve to the state of conducting the straight-through pipeline until the evaporator temperature of the freezing evaporator is higher than the After the compartment temperature in the freezing compartment is reached, the first switching valve is restored to the state of conducting the non-refrigerating branch circuit corresponding to the non-refrigerating compartment in the refrigeration state.
  • both ends of the refrigerated evaporator are connected in parallel with a bypass line, and the compression refrigeration system further includes a circuit for selectively connecting the refrigerated evaporator with one of the bypass lines.
  • control method After adjusting the first switching valve to the state of conducting the straight-through pipeline, the control method further includes:
  • the first switching valve is restored to conduct the The state of the non-freezing branch corresponding to the non-freezing compartment, and adjust the second switching valve to the state of conducting the bypass pipeline;
  • the first preset minimum temperature difference is greater than zero.
  • the refrigerating and freezing device further includes a refrigerating fan for driving air supply to the refrigerating compartment; and
  • control method further includes:
  • the refrigeration fan is activated to cause airflow to circulate between the refrigeration evaporator and the refrigeration compartment.
  • control method further includes:
  • the second switching valve is restored to the state of conducting the refrigerated evaporator.
  • control method further includes:
  • the first preset minimum temperature difference is any temperature difference value ranging from 1°C to 5°C.
  • the second preset minimum temperature difference is any temperature difference value ranging from 1°C to 3°C.
  • the preset minimum humidity is any relative humidity value ranging from 60% to 70%; and/or
  • the preset maximum humidity is any relative humidity value ranging from 80% to 100%.
  • the rotation speed of the freezing fan is lower than the set rotating speed of the freezing fan when the refrigerating and freezing device is in the cooling state of the freezing compartment .
  • said at least one non-refrigerated compartment comprises a refrigerated compartment
  • said at least one non-refrigerated branch comprises a refrigerated branch comprising a refrigerated throttling device and a refrigerated evaporator connected in series; and/ or
  • the at least one non-refrigerated compartment includes a variable temperature compartment
  • the at least one non-refrigerated branch circuit includes a variable temperature branch circuit
  • the variable temperature branch circuit includes a variable temperature throttling device and a variable temperature evaporator connected in series.
  • the present invention also provides a refrigerating and freezing device, comprising:
  • a cabinet defining a refrigerated compartment and at least one non-refrigerated compartment therein;
  • a compression refrigeration system comprising a compressor, a condenser, a refrigerating throttling device and a refrigerating evaporator which are sequentially connected in series, and two ends of the refrigerating throttling device are connected in parallel to provide cooling capacity for the at least one non-refrigerated compartment respectively.
  • At least one non-refrigerating branch circuit, and a throttling or non-restricting pipeline the compression refrigeration system also includes a circuit for selectively conducting the freezing throttling device, the at least one non-refrigerating branch and a first switching valve in one or more of said pipelines; and
  • 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.
  • the refrigerating and freezing device of the present invention is particularly connected in parallel at both ends of the refrigerating throttling device—a throttling or non-throttling pipeline.
  • a throttling or non-throttling pipeline During the cooling of the non-freezing compartment, first obtain the compartment humidity in the freezing compartment, and adjust the first switching valve to at least conduct the pipeline when the compartment humidity in the freezing compartment is lower than the preset minimum humidity, so that compared with only When the non-refrigerated branch circuit is turned on, the degree of throttling of the refrigerant is lower. As a result, the less throttled refrigerant flows to the refrigerated evaporator, causing the evaporator temperature of the refrigerated evaporator to rise.
  • the external water vapor entering the freezer and the moisture in the freezer (such as the volatilized moisture of the ingredients) will condense in the freezer with a lower temperature instead of condensing at the freezing evaporator, effectively maintaining or increasing the moisture in the freezer content thereby maintaining or increasing the humidity in the freezer compartment.
  • the moisturizing or humidification of the freezing compartment can be realized without adding a complicated humidifying device in the refrigerating and freezing device.
  • the pipeline is a throttling branch with an additional throttling valve, that is, in the refrigerating and freezing device of the present invention, a throttling branch with an additional throttling valve is connected in parallel at both ends of the freezing throttling device.
  • the non-refrigerated compartment During the cooling of the non-refrigerated compartment, first obtain the compartment humidity in the refrigerated compartment, and adjust the first switching valve to conduct the throttling branch and refrigerate at the same time when the compartment humidity in the refrigerated compartment is lower than the preset minimum humidity
  • the non-refrigerated branch corresponding to the non-refrigerated compartment so that part of the refrigerant flows through the additional throttle valve, and the other part of the refrigerant flows through the non-refrigerated throttling device and the non-refrigerated evaporator corresponding to the non-refrigerated compartment that is being refrigerated .
  • the refrigerant flowing to the refrigerated evaporator includes the refrigerant after passing through the two branches with different throttling degrees. On the one hand, it meets the cooling demand of the non-refrigerated compartment; Refrigerant with low flow rate will flow to the refrigerated evaporator, which will increase the temperature of the evaporator of the refrigerated evaporator.
  • the external water vapor and the moisture in the freezer (such as the volatile moisture of the food) will condense in the freezer with a lower temperature instead of condensing at the freezer evaporator, effectively maintaining or increasing the moisture content in the freezer to maintain or increase humidity in the freezer.
  • the present invention presets a preferred temperature difference value between the evaporator temperature of the refrigerated evaporator and the temperature of the compartment in the refrigerated compartment, that is, the first preset minimum temperature difference, and by adjusting the opening degree of the additional throttle valve
  • the temperature difference between the evaporator temperature of the refrigerated evaporator and the temperature of the compartment in the refrigerated compartment quickly reaches the first preset minimum temperature difference, so that the humidification effect can be quickly achieved and the humidification efficiency is improved. Without excessively affecting the compartment temperature in the freezer compartment.
  • the pipeline is a straight-through pipeline without any throttling element, that is, in the refrigeration and freezing device of the present invention, a straight-through pipeline without any throttling element is connected in parallel at both ends of the freezing throttling device.
  • first obtain the compartment humidity in the refrigerated compartment and adjust the first switching valve to the state of connecting the straight-through pipeline when the compartment humidity in the refrigerated compartment is lower than the preset minimum humidity, so that the refrigeration
  • the agent flows directly to the refrigerated evaporator without any throttling, thereby rapidly increasing the evaporator temperature of the refrigerated evaporator, so that the evaporator temperature of the refrigerated evaporator is higher than the temperature of the compartment in the refrigerated compartment in a short period of time.
  • the first switching valve returns to the state of conducting the non-refrigerating branch corresponding to the non-refrigerating compartment in the cooling state.
  • the temperature of the refrigerated evaporator rises very quickly, that is, the cut-off time of the non-refrigerated branch is short, which reduces the impact on the cooling efficiency of the non-refrigerated compartment;
  • the evaporator temperature of the refrigerated evaporator is raised to a temperature higher than that of the refrigerated compartment, the outside water vapor entering the refrigerated compartment through the door seal and the moisture in the refrigerated compartment (such as the volatilized moisture of the ingredients) will enter the refrigerated compartment at a lower temperature. Condensation in the room rather than condensation at the refrigerated evaporator effectively maintains or increases the moisture content in the freezer compartment thereby maintaining or increasing the humidity in the freezer compartment.
  • the present invention further connects a bypass pipeline in parallel at both ends of the freezing evaporator.
  • 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 flow chart after starting the refrigeration fan according to a specific embodiment of the present invention.
  • Fig. 6 is a schematic structural block diagram of a refrigerating and freezing device according to an embodiment of the present invention.
  • Fig. 7 is a schematic structural block diagram of a compression refrigeration system 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 a specific embodiment of the present invention.
  • Fig. 9 is a schematic flowchart of a control method of a refrigerating and freezing device according to another specific embodiment of the present invention.
  • Fig. 10 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. 11 is a schematic flowchart of a control method of a refrigerating and freezing device according to another specific embodiment of the present invention.
  • Fig. 12 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. 13 is a schematic structural block diagram of a refrigerating and freezing device according to another 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.
  • a refrigerating and freezing device 1 includes a cabinet 10 and a compression refrigeration system 20 .
  • a freezer compartment 11 and at least one non-freeze compartment are defined inside the box body 10 .
  • the freezer compartment 11 is used as a frozen storage compartment
  • the non-freezer compartment is used as a non-freezing storage compartment.
  • the non-freezer compartment can be used as a storage room for refrigeration or variable temperature room. Normally, the temperature in the non-refrigerated compartment is higher than the temperature in the refrigerated compartment 11 .
  • the compression refrigeration system 20 includes a compressor 21 , a condenser 29 , a refrigeration throttling device 23 and a refrigeration evaporator 22 which are serially connected in series.
  • the refrigeration throttling device 23 may specifically be a capillary tube or a throttle valve. Both ends of the refrigeration throttling device 23 are connected in parallel with at least one non-refrigeration branch circuit for providing cooling capacity to at least one non-refrigeration compartment, and a throttling or non-throttling pipeline 243 .
  • the compression refrigeration system 20 further includes a switching valve 241 (maybe referred to as a first switching valve 241 ) for selectively conducting one or more of the refrigeration throttling device 23 , at least one non-refrigerating branch circuit and the pipeline 243 . That is to say, the first switch valve 241 can only conduct one of the refrigeration throttling device 23, at least one non-refrigeration branch and pipeline 243, so that the refrigerant flowing out of the condenser 29 only flows through this branch.
  • a switching valve 241 (maybe referred to as a first switching valve 241 ) for selectively conducting one or more of the refrigeration throttling device 23 , at least one non-refrigerating branch circuit and the pipeline 243 . That is to say, the first switch valve 241 can only conduct one of the refrigeration throttling device 23, at least one non-refrigeration branch and pipeline 243, so that the refrigerant flowing out of the condenser 29 only flows through this branch.
  • the branch flows to the freezing evaporator 22; the first switching valve 241 can also conduct the freezing throttling device 23, at least one non-refrigerating branch and two or more branches in the pipeline 243, so that from the condensing
  • the refrigerant flowing out of the device 29 is divided into the two or more branches and then flows to the refrigerated evaporator 22 .
  • the present invention particularly proposes a control method for a refrigerating and freezing device, the control method comprising:
  • the first switch valve 241 is adjusted to at least conduct the pipeline 243 so that the throttling degree of the refrigerant is reduced compared to when only the non-refrigerated branch is conducted. lower state to raise the evaporator temperature of the refrigerated evaporator 22 higher than the compartment temperature in the refrigerated compartment 11 .
  • the two ends of the freezing throttling device 23 are connected in parallel—a throttling or non-throttling pipeline 243 .
  • the less throttled refrigerant flows to the refrigerated evaporator 22, causing the evaporator temperature of the refrigerated evaporator 22 to increase.
  • the external water vapor entering the freezing compartment 11 through the door seal and the moisture in the freezing compartment (such as the volatilized moisture of food) will condense in the freezing compartment 11 with a lower temperature instead of condensing at the freezing evaporator 22, effectively
  • the moisture content in the freezing compartment 11 is maintained or increased so as to maintain or increase the humidity in the freezing compartment 11 .
  • the moisturizing or humidification of the freezing compartment can be realized without adding a complicated humidifying device in the refrigerating and freezing device.
  • line 243 is a throttling branch 243 with an additional throttling valve 242 . That is to say, at least one non-refrigerated branch circuit and a throttling branch circuit 243 with an additional throttle valve 242 are connected in parallel at both ends of the refrigeration throttling device 23 for providing cooling capacity for at least one non-refrigerated compartment.
  • the refrigeration system 20 further includes a first switching valve 241 for selectively conducting one or more of the freezing throttling device 23 , at least one non-refrigerating branch and the throttling branch 243 .
  • the first switching valve 241 can only conduct one of the freezing throttling device 23 , at least one non-refrigerating branch, and the throttling branch 243 , so that the refrigerant flowing out of the condenser 29 only flows After passing through the branch, it flows to the refrigeration evaporator 22; the first switching valve 241 can also lead to two or more branches of the refrigeration throttling device 23, at least one non-refrigeration branch and throttling branch 243, So that the refrigerant flowing out of the condenser 29 is divided into the two or more branches and flows to the refrigeration evaporator 22 .
  • each non-refrigerated branch may include a non-refrigerated throttling device and a non-refrigerated evaporator connected in series.
  • series connection and parallel connection mentioned in the present invention respectively refer to the physical series connection and parallel connection of the refrigerant flow paths, rather than the series connection and parallel connection of the circuit structure.
  • the state of the first switching valve 241 is set to only communicate with the non-refrigerating branch corresponding to the condenser 29 and the non-refrigerating compartment.
  • the refrigerant passes through the condenser 29, the first switching valve 241, the non-refrigerating evaporator of the non-refrigerating branch, the non-refrigerating throttling device, the freezing evaporator 22, and finally returns to the compressor 21.
  • the state of the first switching valve 241 is set to communicate with the condenser 29 and the freezing throttling device 23. At this time, the refrigerant flowing out from the compressor 21 passes through the condenser 29 in sequence. , the first switching valve 241, the refrigeration throttling device 23 and the refrigeration evaporator 22, and finally return to the compressor 21.
  • At least one non-refrigerated compartment includes a refrigerated compartment 12, and at least one non-refrigerated branch circuit includes a refrigerated branch circuit.
  • the refrigerated branch circuit includes a refrigerated throttling device 26 and a refrigerated evaporator 25 connected in series.
  • the device 26 may be a capillary 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 freezer compartment 11 is not an absolutely closed compartment.
  • the air carrying moisture from the outside will enter the freezer compartment 11 through the door seal of the freezer compartment 11; the unfrozen ingredients inside the freezer compartment 11 will volatilize a certain amount of moisture; after the ingredients in the freezer compartment 11 are frozen, the ingredients
  • the moisture on the surface has a small amount of sublimation; the frost formed on the surface of the freezing evaporator 22 also has a small amount of sublimation. That is to say, the refrigerating-freezing device 1 originally has a variety of moisture sources that can be used for moisturizing or humidifying the freezing compartment 11 . If these moisture can be effectively used as moisturizing or humidifying the freezing compartment 11, then there is no need to arrange any other humidifying devices.
  • frost condensation rarely occurs in the storage compartment, and frost condensation basically occurs on the evaporator. This is because the temperature of the evaporator is generally lower than that of the storage compartment. That is to say, water vapor usually gathers and condenses in places with lower temperatures. Then, if the compartment temperature in the freezing compartment 11 is lower than the evaporator temperature at the freezing evaporator 22, water vapor will gather in the freezing compartment 11, which can effectively moisturize the freezing compartment 11 or improve the cooling capacity of the freezing compartment. Indoor humidity.
  • the present invention particularly proposes a kind of control method of refrigeration freezer, and this control method comprises:
  • the first switching valve 241 is adjusted to the state where the throttling branch 243 and the non-freezing branch corresponding to the non-freezing compartment in the cooling state are simultaneously connected. , so as to raise the evaporator temperature of the refrigerated evaporator 22 to be higher than the compartment temperature in the refrigerated compartment 11 .
  • a throttling branch 243 with an additional throttling valve 242 is connected in parallel at both ends of the freezing throttling device 23 .
  • the refrigerant flowing to the refrigerated evaporator 22 includes the refrigerant that has been throttled by different throttling degrees of the two branches.
  • the low throttling refrigerant of the road 243 flows to the refrigerated evaporator 22, which will increase the temperature of the evaporator of the refrigerated evaporator 22.
  • the external water vapor entering the freezing compartment 11 through the door seal and the moisture in the freezing compartment 11 (such as the volatilized moisture of the food) will condense in the freezing compartment 11 with a lower temperature instead of condensing at the freezing evaporator 22, effectively
  • the moisture content in the freezer compartment 11 is maintained or increased to thereby maintain or increase the humidity in the freezer compartment 11 .
  • the present invention utilizes the moisture inside the refrigerating and freezing device 1 to realize the humidification and moisturizing of the freezing compartment 11.
  • the design scheme is completely different from the scheme adopted in the prior art.
  • the design idea is very novel, and the effect is remarkable, and the prospect of practical application is good.
  • 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 when the refrigerating and freezing device 1 is in the cooling state of any non-freezing compartment, obtain the compartment humidity in the freezing compartment 11;
  • Step S20 judging whether the humidity of the compartment in the freezer compartment 11 is lower than the preset minimum humidity; if yes, go to step S30; if not, return to obtain the compartment humidity in the freezer compartment 11 again;
  • Step S30 adjust the switching valve 241 (also referred to as the first switching valve 241) to the state of conducting the throttling branch 243 and the non-refrigerating branch corresponding to the non-refrigerating compartment in the cooling state at the same time, so that the refrigerating evaporator The evaporator temperature at 22 is raised above the compartment temperature in the freezer compartment 11.
  • the switching valve 241 also referred to as the first switching valve 241
  • control method of the present invention further includes:
  • the opening of the additional throttle valve 242 is increased, so that the refrigerated evaporator 22
  • the temperature difference between the evaporator temperature and the compartment temperature in the freezing compartment 11 reaches a first preset minimum temperature difference.
  • the first preset minimum temperature difference is greater than zero.
  • the present invention presets a preferred temperature difference value between the evaporator temperature of the refrigerated evaporator 22 and the compartment temperature in the refrigerated compartment 11, that is, the first preset minimum temperature difference, and by adjusting the additional throttle valve
  • the opening of 242 makes the temperature difference between the evaporator temperature of the refrigerated evaporator 22 and the temperature of the compartment in the refrigerated compartment 11 quickly reach the first preset minimum temperature difference, thus, it can quickly achieve obvious humidification function, the humidification efficiency is improved, and the compartment temperature in the freezing compartment 11 will not be affected excessively.
  • FIG. 4 is a schematic flowchart 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 further includes:
  • Step S40 obtaining the evaporator temperature of the refrigerated evaporator 22 and the compartment temperature in the refrigerated compartment 11;
  • Step S50 judging whether the temperature difference between the evaporator temperature of the refrigerated evaporator 22 and the temperature of the compartment in the refrigerated compartment 11 reaches the first preset minimum temperature difference; if not, go to step S60;
  • Step S60 increase the opening degree of the additional throttle valve 242, and return to step S40 to obtain the evaporator temperature of the refrigerated evaporator 22 and the compartment temperature in the refrigerated compartment 11 again.
  • the refrigerating and freezing device 1 further includes a refrigerating fan 31 for driving air to the refrigerating compartment 11 . It can be understood that, when the refrigerating-freezing device 1 is in the cooling state of any non-refrigerating compartment, the freezing fan 31 is usually in a stopped state.
  • the control method of the present invention further includes:
  • step S70 When the temperature difference between the evaporator temperature of the refrigerated evaporator 22 and the temperature of the compartment in the refrigerated compartment 11 reaches the first preset minimum temperature difference, go to step S70;
  • Step S70 start the refrigeration fan 31 to promote the circulation of the airflow between the refrigeration evaporator 22 and the refrigeration compartment 11 .
  • the present invention sets the freezing fan 31 during the cooling of the non-freezing compartment so that the humidity of the compartment in the freezing compartment 11 is less than the preset minimum humidity and between the evaporator temperature of the freezing evaporator 22 and the compartment temperature of the freezing compartment 11
  • the freezing fan 31 can be used to promote the rapid sublimation of part of the frost on the surface of the freezing evaporator 22, and the water vapor formed by the sublimation can quickly enter the freezing compartment 11 with a lower temperature, further improving The humidification rate of the freezer compartment 11 is determined.
  • control method of the present invention further includes:
  • the opening degree of the additional throttle valve 242 is gradually reduced until the compartment temperature in the freezer compartment 11 is equal to the evaporation rate of the refrigerated evaporator 22.
  • the opening degree of the additional throttle valve 242 is kept constant when the temperature difference between the temperature of the heater reaches a second preset minimum temperature difference, wherein the second preset minimum temperature difference is greater than zero.
  • the present invention gradually reduces the opening degree of the additional throttle valve 242, so that the evaporator temperature of the refrigerating evaporator 22 gradually decreases, so as to avoid the excessive adjustment range of the opening degree of the additional throttle valve 242 causing the refrigerating evaporator 22 to
  • the uncontrolled speed and magnitude of the evaporator temperature drop again causes a phenomenon in which the humidity of the compartment inside the freezer compartment 11 is significantly lowered.
  • the opening of the additional throttle valve 242 remains unchanged.
  • the evaporator of the refrigerated evaporator 22 The temperature of the device is slightly lower than the temperature of the compartment in the freezer compartment 11, which can properly adjust the temperature in the freezer compartment 11 without causing the humidity in the freezer compartment 11 to decrease significantly, and the scheme design is more reasonable.
  • control method of the present invention further includes:
  • Step S80 acquiring the compartment humidity in the freezing compartment 11 again.
  • Step S90 judging whether the humidity of the compartment in the refrigerated compartment 11 obtained again has reached the preset maximum humidity; if so, go to step S100; if not, return to step S80 to continue to obtain the compartment humidity in the refrigerated compartment 11;
  • Step S100 reducing the opening of the additional throttle valve 242;
  • Step S110 acquiring the evaporator temperature of the refrigerated evaporator 22 and the compartment temperature in the refrigerated compartment 11 again;
  • Step S120 judging whether the temperature difference between the compartment temperature in the refrigerated compartment 11 and the evaporator temperature of the refrigerated evaporator 22 has reached the second preset minimum temperature difference; if yes, go to step S130; if not, go to step S120; Step S100, to reduce the opening degree of the additional throttle valve 242 again.
  • Step S130 keeping the opening of the additional throttle valve 242 unchanged.
  • the opening of the additional throttle valve 242 can be maintained until the temperature of the compartment in the cooling non-refrigerated compartment reaches its set shutdown point temperature, that is, until the cooling of the non-refrigerated compartment in cooling is completed.
  • control method of the present invention further includes:
  • the refrigerating fan 31 after the refrigerating fan 31 is started, it can continue to run until the refrigerating of the non-refrigerating compartment is finished.
  • the operation of the freezer fan 31 can promote the rapid sublimation of the frost on the freezer evaporator 22, and make the water vapor formed by sublimation gather in the freezer compartment 11 to further improve the humidification efficiency of the freezing compartment 11.
  • the evaporator temperature of the freezer evaporator 22 is slightly lower than the compartment temperature in the freezer compartment 11.
  • the continuous operation of the freezer fan 31 can reduce the temperature to approximately equal to Or the cooling air flow that is slightly lower than the temperature of the compartments in the freezing compartment 11 is sent into the freezing compartment 11, which helps to maintain the temperature of the compartments in the freezing compartment 11 within a preferred range.
  • the rotational speed of the freezing fan 31 is lower than the set rotational speed of the freezing fan 31 when the refrigerating-freezing device 1 is in the cooling state of the freezing compartment. In this way, the water vapor formed by partial frost sublimation on the freezing evaporator 22 can be quickly sent into the freezing compartment 11, and more airflow with a relatively high temperature can be avoided from entering the freezing compartment 11 and causing the freezing compartment 11 The internal temperature rises more.
  • the above-mentioned first preset minimum temperature difference is any temperature difference value ranging from 1°C to 5°C.
  • the first preset minimum temperature difference may take a value of 1°C, 2°C, 3°C, 4°C or 5°C. That is to say, when the evaporator temperature of the refrigerating evaporator 22 is 1-5°C higher than the temperature of the compartment in the refrigerated compartment 11, the refrigerating fan 31 is started. It is more suitable, not only can achieve a better humidification effect in the freezing compartment 11, but also will not have a great impact on the temperature in the freezing compartment 11.
  • the above-mentioned second preset minimum temperature difference is any temperature difference value within a range of 1-3°C.
  • the second preset minimum temperature difference may take a value of 1°C, 2°C or 3°C. That is to say, when the evaporator temperature of the refrigerated evaporator 22 is 1-3°C lower than the temperature of the compartment in the refrigerated compartment 11, the opening of the additional throttle valve 242 remains unchanged. The slightly lower cooling air flow of delivery temperature in 11 can avoid the obvious reduction of the humidity in the freezing compartment 11 again.
  • the preset minimum humidity is any relative humidity value ranging from 60% to 70%.
  • the preset minimum humidity threshold may be 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67%, 68%, 69% or 70%. If the humidity in the freezer compartment 11 is lower than this range, the quality of the food will be affected. If the value of the preset minimum humidity is too small, then when the humidity in the freezer compartment 11 is already very low, the humidification start condition of the freezer compartment 11 still cannot be reached, and the quality of food materials in the freezer compartment 11 will be affected due to excessive humidity. If the temperature is low, it will be affected, and it is impossible to perform substantial and long-term moisturizing and humidification operations on the freezing compartment 11 .
  • the start-up condition for humidification of the refrigerated compartment 11 is easily reached, causing the first switching valve 241 to switch the refrigerant flow path too early or too long, thereby affecting the cooling of the non-refrigerated compartment.
  • the preset maximum humidity is any relative humidity value ranging from 80% to 100%.
  • the preset maximum humidity can be 80%, 85%, 90%, 95% or 100%.
  • the humidity in the freezing compartment 11 is not yet saturated, close to saturated or just saturated, the water vapor in the freezing compartment 11 will not or is not easy to condense, the moisturizing or humidifying effect is better, and the food preservation effect is better.
  • the opening of the additional throttle valve 242 is adjusted to impel the temperature of the freezer evaporator 22 to drop to a temperature slightly lower than that of the freezer compartment 11. It is beneficial to maintain the temperature in the freezer compartment 11 in time, and avoid the temperature in the freezer compartment 11 from excessively rising and affecting the preservation quality of food materials.
  • the invention also provides a refrigerating and freezing device.
  • the refrigerating and freezing device 1 of the present invention includes a box body 10 and a compression refrigeration system 20 .
  • a freezer compartment 11 and at least one non-freeze compartment are defined inside the box body 10 .
  • the compression refrigeration system 20 includes a compressor 21 , a condenser 29 , a refrigeration throttling device 23 and a refrigeration evaporator 22 which are serially connected in series. Both ends of the refrigeration throttling device 23 are connected in parallel with at least one non-refrigeration branch circuit for providing cooling capacity to at least one non-refrigeration compartment, and a throttling or non-throttling pipeline 243 .
  • the compression refrigeration system 20 further includes a first switching valve 241 for selectively conducting one or more of the refrigeration throttling device 23 , at least one non-refrigeration branch circuit and the pipeline 243 .
  • the refrigerating and freezing device 1 further 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 implement the control method described in any of the above embodiments when executed by the processor 41.
  • Fig. 6 is a schematic structural block diagram of a refrigerating and freezing device according to an embodiment of the present invention.
  • the refrigerating and freezing device 1 of the present invention includes a cabinet 10 and a compression refrigeration system 20 .
  • a freezer compartment 11 and at least one non-freeze compartment are defined inside the box body 10 .
  • the compression refrigeration system 20 includes a compressor 21 , a condenser 29 , a refrigeration throttling device 23 and a refrigeration evaporator 22 which are serially connected in series. Both ends of the refrigeration throttling device 23 are connected in parallel with at least one non-refrigerating branch circuit for providing cooling capacity for at least one non-refrigerating compartment, and a throttling branch circuit 243 with an additional throttle valve 242.
  • the compression refrigeration system 20 also It includes a first switching valve 241 for selectively conducting one or more of the freezing throttling device 23 , at least one non-refrigerating branch and the throttling branch 243 .
  • the refrigerating and freezing device 1 further 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 implement the control method described in any of the above embodiments when executed by the processor 41.
  • both the first switching valve 241 and the additional throttle valve 242 are electrically 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).
  • a throttling branch 243 with an additional throttling valve 242 is connected in parallel at both ends of the freezing throttling device 23 .
  • the refrigerant flowing to the refrigerated evaporator 22 includes the refrigerant that has been throttled by different throttling degrees of the two branches.
  • the low throttling refrigerant of the road 243 flows to the refrigerated evaporator 22, which will increase the temperature of the evaporator of the refrigerated evaporator 22.
  • the external water vapor entering the freezing compartment 11 through the door seal and the moisture in the freezing compartment 11 (such as the volatilized moisture of the food) will condense in the freezing compartment 11 with a lower temperature instead of condensing at the freezing evaporator 22, effectively
  • the moisture content in the freezer compartment 11 is maintained or increased to maintain or increase the humidity in the freezer compartment 11 .
  • the refrigerating and freezing device 1 also includes a refrigerating fan 31 connected to the control device 40, and the refrigerating fan 31 is configured to be between the temperature of the evaporator of the refrigerating evaporator 22 and the temperature of the compartment in the refrigerating compartment 11 during non-refrigerating refrigeration.
  • the temperature difference reaches the first preset minimum temperature difference, it is controlled to start, so as to promote the airflow to circulate between the freezing evaporator 22 and the freezing compartment 11, and improve the humidification efficiency in the freezing compartment 11.
  • FIG. 7 is a schematic structural block diagram of a compression refrigeration system of a refrigerating and freezing device according to another embodiment of the present invention.
  • the refrigerating and freezing device 1 includes a box body 10 and a compression refrigeration system 20 .
  • a freezer compartment 11 and at least one non-freeze compartment are defined inside the box body 10 .
  • the freezer compartment 11 is used as a frozen storage compartment
  • the non-freezer compartment is used as a non-freezing storage compartment.
  • the non-freezer compartment can be used as a storage room for refrigeration or variable temperature room. Normally, the temperature in the non-refrigerated compartment is higher than the temperature in the refrigerated compartment 11 .
  • the compression refrigeration system 20 includes a compressor 21 , a condenser 29 , a refrigeration throttling device 23 and a refrigeration evaporator 22 which are serially connected in series.
  • the refrigeration throttling device 23 may specifically be a capillary tube or a throttle valve.
  • the pipeline 243 is a straight-through pipeline 243 without throttling.
  • the non-refrigerated compartment provides at least one non-refrigerated branch circuit of cooling capacity, and the compression refrigeration system 20 also includes a switch for selectively connecting the frozen throttling device 23, at least one non-refrigerated branch circuit, and the straight line 243.
  • the first switching valve 241 is a switch for selectively connecting the frozen throttling device 23, at least one non-refrigerated branch circuit, and the straight line 243.
  • the first switching valve 241 can selectively conduct one of the freezing throttling device 23 , at least one non-refrigerating branch, and the throttling branch 243 , so that the refrigerant flowing out of the condenser 29 Only after flowing through this branch, it flows to the refrigeration evaporator 22 .
  • each non-refrigerated branch circuit may include a non-refrigerated throttling device and a non-refrigerated evaporator connected in series.
  • series connection and parallel connection mentioned in the present invention respectively refer to the physical series connection and parallel connection of the refrigerant flow paths, rather than the series connection and parallel connection of the circuit structure.
  • the state of the first switching valve 241 is set to only communicate with the non-refrigerating branch corresponding to the condenser 29 and the non-refrigerating compartment.
  • the refrigerant passes through the condenser 29, the first switching valve 241, the non-refrigerating evaporator of the non-refrigerating branch, the non-refrigerating throttling device, the freezing evaporator 22, and finally returns to the compressor 21.
  • the state of the first switching valve 241 is set to communicate with the condenser 29 and the freezing throttling device 23. At this time, the refrigerant flowing out from the compressor 21 passes through the condenser 29 in sequence. , the first switching valve 241, the refrigeration throttling device 23 and the refrigeration evaporator 22, and finally return to the compressor 21.
  • At least one non-refrigerated compartment includes a refrigerated compartment 12, and at least one non-refrigerated branch circuit includes a refrigerated branch circuit.
  • the refrigerated branch circuit includes a refrigerated throttling device 26 and a refrigerated evaporator 25 connected in series.
  • the device 26 may be a capillary 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 freezer compartment 11 is not an absolutely closed compartment.
  • the air carrying moisture from the outside will enter the freezer compartment 11 through the door seal of the freezer compartment 11; the unfrozen ingredients inside the freezer compartment 11 will volatilize a certain amount of moisture; after the ingredients in the freezer compartment 11 are frozen, the ingredients
  • the moisture on the surface has a small amount of sublimation; the frost formed on the surface of the freezing evaporator 22 also has a small amount of sublimation. That is to say, the refrigerating-freezing device 1 originally has a variety of moisture sources that can be used for moisturizing or humidifying the freezing compartment 11 . If these moisture can be effectively used as moisturizing or humidifying the freezing compartment 11, then there is no need to arrange any other humidifying devices.
  • frost condensation rarely occurs in the storage compartment, and frost condensation basically occurs on the evaporator. This is because the temperature of the evaporator is generally lower than that of the storage compartment. That is to say, water vapor usually gathers and condenses in places with lower temperatures. Then, if the compartment temperature in the freezing compartment 11 is lower than the evaporator temperature at the freezing evaporator 22, water vapor will gather in the freezing compartment 11, which can effectively moisturize the freezing compartment 11 or improve the cooling capacity of the freezing compartment. Indoor humidity.
  • the present invention particularly proposes a kind of control method of refrigeration freezer, and this control method comprises:
  • the first switch valve 241 When the humidity of the compartment in the freezer compartment 11 is lower than the preset minimum humidity, the first switch valve 241 is adjusted to the state of conducting the straight-through pipeline 243 until the evaporator temperature of the freezer evaporator 22 is higher than that in the freezer compartment 11. Then the first switching valve 241 is restored to the state of conducting the non-refrigerated branch corresponding to the non-refrigerated compartment in the refrigeration state.
  • a straight-through pipeline 243 without any throttling element is connected in parallel at both ends of the freezing throttling device 23 .
  • the first switching valve 241 is restored to the state of conducting the non-refrigerated branch corresponding to the non-refrigerated compartment in the refrigerated state.
  • the temperature of the refrigerated evaporator 22 is raised very quickly, that is, the cut-off time of the non-refrigerated branch is relatively short, which reduces the impact on the cooling efficiency of the non-refrigerated compartment;
  • the temperature of the evaporator of the freezing evaporator 22 is increased to a temperature higher than that of the freezing compartment 11, the external water vapor entering the freezing compartment 11 and the moisture in the freezing compartment 11 (such as the volatilized moisture of food) through the door seal It will condense in the lower temperature freezer compartment 11 instead of condensing at the freezer evaporator 22 , effectively maintaining or increasing the moisture content in the freezer compartment 11 so as to maintain or increase the humidity in the freezer compartment 11 .
  • the present invention utilizes the moisture inside the refrigerating and freezing device 1 to realize the humidification and moisturizing of the freezing compartment 11.
  • the design scheme is completely different from the scheme adopted in the prior art.
  • the design idea is very novel, and the effect is remarkable, and the prospect of practical application is good.
  • Fig. 8 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' when the refrigerator-freezer 1 is in the cooling state of any non-freezing compartment, obtain the compartment humidity in the freezing compartment 11;
  • Step S20' judging whether the humidity of the compartment in the freezer compartment 11 is lower than the preset minimum humidity; if so, go to step S30'; if not, return to obtain the compartment humidity in the freezer compartment 11 again;
  • Step S30' adjusting the first switching valve 241 to the state of conducting the straight-through pipeline 243;
  • Step S40' obtaining the evaporator temperature of the refrigerated evaporator 22 and the compartment temperature in the refrigerated compartment 11;
  • Step S50' determine whether the evaporator temperature of the refrigerated evaporator 22 is higher than the temperature of the compartment in the refrigerated compartment 11; if so, go to step S60'; The temperature of the refrigerator and the compartment temperature in the freezing compartment 11;
  • Step S60' restore the first switching valve 241 to the state of conducting the non-refrigerated branch corresponding to the non-refrigerated compartment in the cooling state.
  • Fig. 9 is a schematic flowchart 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' when the refrigerator-freezer 1 is in the cooling state of any non-freezing compartment, obtain the compartment humidity in the freezing compartment 11;
  • Step S20' judging whether the humidity of the compartment in the freezer compartment 11 is lower than the preset minimum humidity; if so, go to step S30'; if not, return to obtain the compartment humidity in the freezer compartment 11 again;
  • Step S30' adjusting the first switching valve 241 to the state of conducting the straight-through pipeline 243;
  • Step S40' obtaining the evaporator temperature of the refrigerated evaporator 22 and the compartment temperature in the refrigerated compartment 11;
  • Step S50 judge whether the temperature difference between the evaporator temperature of the refrigerated evaporator 22 and the temperature of the compartment in the refrigerated compartment 11 reaches the preset minimum temperature difference (also referred to as the first preset minimum temperature difference); if so, go to Step S60'; if not, return to step S40' to reacquire the temperature of the evaporator of the refrigerated evaporator 22 and the temperature of the compartment in the refrigerated compartment 11; wherein, the preset minimum temperature difference is greater than zero, that is, the evaporator of the refrigerated evaporator 22 The temperature is higher than the compartment temperature in the freezing compartment 11;
  • Step S60' restore the first switching valve 241 to the state of conducting the non-refrigerated branch corresponding to the non-refrigerated compartment in the cooling state.
  • the present invention presets a preferred temperature difference value between the evaporator temperature of the refrigeration evaporator 22 and the compartment temperature in the refrigeration compartment, that is, a preset minimum temperature difference greater than zero. .
  • a preset minimum temperature difference greater than zero.
  • a bypass pipeline 244 is connected in parallel at both ends of the refrigeration evaporator 22, and the compression refrigeration system 20 also includes a circuit for selectively connecting the refrigeration evaporator 22 and the bypass pipeline 244.
  • One of the second switching valves 245 is one of the second switching valves 245 .
  • the second switching valve 245 is in the state of conducting the refrigerated evaporator 22 .
  • the control method of the present invention further includes:
  • the first switch valve 241 When the temperature difference between the evaporator temperature of the refrigerated evaporator 22 and the temperature of the compartment in the refrigerated compartment 11 reaches a preset minimum temperature difference (that is, the first preset minimum temperature difference), the first switch valve 241 is restored to conduction.
  • the non-refrigerated compartment in the refrigerated state corresponds to the state of the non-refrigerated branch circuit, and the second switching valve 245 is adjusted to the state of conducting the bypass line 244 .
  • a bypass pipeline 244 is further connected in parallel at both ends of the freezing evaporator 22 .
  • the temperature difference between the evaporator temperature of the refrigerated evaporator 22 and the temperature of the compartment in the refrigerated compartment 11 reaches the first preset minimum temperature difference, not only will the first switch valve 241 be restored to the non-refrigerated mode in the refrigerated state.
  • the state of the non-refrigerated branch corresponding to the compartment so as to continue to refrigerate the non-refrigerated compartment, and also switch the second switching valve 245 to the state of conducting the bypass line 244, so as to prevent the refrigerant from flowing through the refrigerated evaporator twenty two.
  • the temperature of the evaporator of the refrigerated evaporator 22 can be maintained at a state higher than the temperature of the compartments in the refrigerated compartment 11 by the first preset minimum temperature difference, so as to continuously exert a relatively obvious humidification effect and avoid the refrigerated compartment 11.
  • the humidity inside fluctuates as the non-refrigerated compartment continues to cool.
  • FIG. 10 is a schematic flow chart 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' when the refrigerator-freezer 1 is in the cooling state of any non-freezing compartment, obtain the compartment humidity in the freezing compartment 11;
  • Step S20' judging whether the humidity of the compartment in the freezer compartment 11 is lower than the preset minimum humidity; if so, go to step S30'; if not, return to obtain the compartment humidity in the freezer compartment 11 again;
  • Step S30' adjusting the first switching valve 241 to the state of conducting the straight-through pipeline 243;
  • Step S40' obtaining the evaporator temperature of the refrigerated evaporator 22 and the compartment temperature in the refrigerated compartment 11;
  • Step S50 judging whether the temperature difference between the temperature of the evaporator of the refrigerated evaporator 22 and the temperature of the compartment in the refrigerated compartment 11 reaches the preset minimum temperature difference (ie the first preset minimum temperature difference); if so, go to step S60" ; If not, return to step S40' to reacquire the evaporator temperature of the refrigerated evaporator 22 and the compartment temperature in the refrigerated compartment 11;
  • the preset minimum temperature difference ie the first preset minimum temperature difference
  • Step S60 restore the first switching valve 241 to the state of conducting the non-refrigerating branch corresponding to the non-refrigerating compartment in the cooling state, and adjust the second switching valve 245 to the state of conducting the bypass line 244.
  • the refrigerating and freezing device 1 further includes a refrigerating fan 31 for driving air to the refrigerating compartment 11 . It can be understood that, when the refrigerating-freezing device 1 is in the cooling state of any non-refrigerating compartment, the freezing fan 31 is usually in a stopped state.
  • the control method of the present invention also includes:
  • control method further includes:
  • the refrigerating fan 31 is activated to cause the air flow to circulate between the refrigerating evaporator 22 and the refrigerating compartment 11.
  • Fig. 11 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' when the refrigerator-freezer 1 is in the cooling state of any non-freezing compartment, obtain the compartment humidity in the freezing compartment 11;
  • Step S20' judging whether the humidity of the compartment in the freezer compartment 11 is lower than the preset minimum humidity; if so, go to step S30'; if not, return to obtain the compartment humidity in the freezer compartment 11 again;
  • Step S30' adjusting the first switching valve 241 to the state of conducting the straight-through pipeline 243;
  • Step S40' obtaining the evaporator temperature of the refrigerated evaporator 22 and the compartment temperature in the refrigerated compartment 11;
  • Step S50 judging whether the temperature difference between the temperature of the evaporator of the refrigerated evaporator 22 and the temperature of the compartment in the refrigerated compartment 11 reaches the preset minimum temperature difference (ie the first preset minimum temperature difference); if so, go to step S60" '; If not, return to step S40' to reacquire the evaporator temperature of the refrigerated evaporator 22 and the compartment temperature in the refrigerated compartment 11;
  • the preset minimum temperature difference ie the first preset minimum temperature difference
  • Step S60"' restore the first switching valve 241 to the state of conducting the non-refrigerating branch corresponding to the non-refrigerating compartment in the cooling state, adjust the second switching valve 245 to the state of conducting the bypass pipeline 244, And start the refrigeration fan 31.
  • the present invention sets the refrigeration fan 31 to start running when the temperature difference between the evaporator temperature of the refrigeration evaporator 22 and the compartment temperature of the refrigeration chamber 11 reaches the first preset minimum temperature difference during the refrigeration period of the non-freezing compartment, and can pass the refrigeration.
  • the fan 31 promotes rapid sublimation of part of the frost formed on the surface of the refrigerated evaporator 22 , and makes the water vapor formed by the sublimation quickly enter the refrigerated compartment 11 with a lower temperature, further increasing the humidification rate of the refrigerated compartment 11 .
  • control method of the present invention further includes:
  • the second switch valve 245 is restored to the state of conducting the refrigerated evaporator 22 to allow the refrigerant to flow through the refrigerated evaporator 22 .
  • FIG. 12 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' when the refrigerator-freezer 1 is in the cooling state of any non-freezing compartment, obtain the compartment humidity in the freezing compartment 11;
  • Step S20' judging whether the humidity of the compartment in the freezer compartment 11 is lower than the preset minimum humidity; if so, go to step S30'; if not, return to obtain the compartment humidity in the freezer compartment 11 again;
  • Step S30' adjusting the first switching valve 241 to the state of conducting the straight-through pipeline 243;
  • Step S40' obtaining the evaporator temperature of the refrigerated evaporator 22 and the compartment temperature in the refrigerated compartment 11;
  • Step S50 judging whether the temperature difference between the temperature of the evaporator of the refrigerated evaporator 22 and the temperature of the compartment in the refrigerated compartment 11 reaches the preset minimum temperature difference (ie the first preset minimum temperature difference); if so, go to step S60" '; If not, return to step S40' to reacquire the evaporator temperature of the refrigerated evaporator 22 and the compartment temperature in the refrigerated compartment 11;
  • the preset minimum temperature difference ie the first preset minimum temperature difference
  • Step S60"' restore the first switching valve 241 to the state of conducting the non-refrigerating branch corresponding to the non-refrigerating compartment in the cooling state, adjust the second switching valve 245 to the state of conducting the bypass pipeline 244, And start the freezing fan 31;
  • Step S70' obtain the compartment humidity in the freezing compartment 11 again.
  • Step S80' judging whether the humidity of the compartment in the refrigerated compartment 11 obtained again has reached the preset maximum humidity; if yes, go to step S90'; if not, return to step S70' to continue acquiring the compartments in the refrigerated compartment 11 humidity;
  • step S90' the second switching valve 245 is restored to the state of conducting the refrigeration evaporator 22.
  • control method of the present invention further includes:
  • the refrigerating fan 31 after the refrigerating fan 31 is started, it can continue to run until the refrigerating of the non-refrigerating compartment is finished.
  • the operation of the freezer fan 31 can promote the rapid sublimation of the frost on the freezer evaporator 22, and make the water vapor formed by sublimation gather in the freezer compartment 11 to further improve the humidification efficiency of the freezing compartment 11.
  • the humidity of the compartment in the freezing compartment 11 reaches the preset maximum humidity, the refrigerant resumes flowing to the freezing evaporator 22, and the temperature of the evaporator of the freezing evaporator 22 will gradually decrease to slightly lower than the temperature of the compartment in the freezing compartment 11.
  • the continuous operation of the freezing fan 31 can deliver the cooling airflow with a temperature approximately equal to or slightly lower than the temperature of the compartment in the freezing compartment 11 to the freezing compartment 11, which helps to reduce the temperature of the compartment in the freezing compartment 11. remain within the preferred range.
  • the rotational speed of the freezing fan 31 is lower than the set rotational speed of the freezing fan 31 when the refrigerating-freezing device 1 is in the cooling state of the freezing compartment. In this way, the water vapor formed by partial frost sublimation on the freezing evaporator 22 can be quickly sent into the freezing compartment 11, and more airflow with a relatively high temperature can be avoided from entering the freezing compartment 11 and causing the freezing compartment 11 The internal temperature rises more.
  • the preset minimum temperature difference (ie, the first preset minimum temperature difference) is any temperature difference value ranging from 1°C to 5°C.
  • the preset minimum temperature difference may take a value of 1°C, 2°C, 3°C, 4°C or 5°C. That is to say, when the evaporator temperature of the refrigerated evaporator 22 is 1-5°C higher than the compartment temperature in the refrigerated compartment 11, the states of the first switch valve 241 and the second switch valve 245 are switched and the refrigerated fan 31 is started.
  • the evaporator temperature of the freezing evaporator 22 can be maintained at a state slightly higher than the temperature of the compartments in the freezing compartment 11, and the temperature of the airflow blown to the freezing compartment 11 by the freezing fan 31 is more suitable. 11 to obtain a better humidification effect, but also will not have a greater impact on the temperature in the freezing compartment 11.
  • the preset minimum humidity is any relative humidity value ranging from 60% to 70%.
  • the preset minimum humidity threshold may be 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67%, 68%, 69% or 70%. If the humidity in the freezer compartment 11 is lower than this range, the quality of the food will be affected. If the value of the preset minimum humidity is too small, then when the humidity in the freezer compartment 11 is already very low, the humidification start condition of the freezer compartment 11 still cannot be reached, and the quality of food materials in the freezer compartment 11 will be affected due to excessive humidity. If the temperature is low, it will be affected, and it is impossible to perform substantial and long-term moisturizing and humidification operations on the freezing compartment 11 .
  • the start-up condition for humidification of the refrigerated compartment 11 is easily reached, causing the first switching valve 241 to switch the refrigerant flow path too early or too long, thereby affecting the cooling of the non-refrigerated compartment.
  • the preset maximum humidity is any relative humidity value ranging from 80% to 100%.
  • the preset maximum humidity can be 80%, 85%, 90%, 95% or 100%.
  • the humidity in the freezing compartment 11 is not yet saturated, close to saturated or just saturated, the water vapor in the freezing compartment 11 will not or is not easy to condense, the moisturizing or humidifying effect is better, and the food preservation effect is better. At this time, there is no need to continue to humidify the interior of the freezing compartment 11 efficiently.
  • adjusting the refrigerant flow path to switch to the freezing evaporator 22 is conducive to reducing the evaporator temperature of the freezing evaporator 22 in a timely manner, and timely
  • the temperature in the freezer compartment 11 is maintained to prevent the temperature in the freezer compartment 11 from rising too much and affecting the preservation quality of the food.
  • FIG. 13 is a schematic structural block diagram of a refrigerating and freezing device according to another embodiment of the present invention.
  • the refrigerating and freezing device 1 of the present invention includes a box body 10 and a compression refrigeration system 20 .
  • a freezer compartment 11 and at least one non-freeze compartment are defined inside the box body 10 .
  • the compression refrigeration system 20 includes a compressor 21, a condenser 29, a refrigeration throttling device 23 and a refrigeration evaporator 22 connected in series in sequence.
  • the two ends of the refrigeration throttling device 23 are connected in parallel with a non-throttled straight-through pipeline 243 and at least one non-refrigeration branch circuit for providing cooling capacity for at least one non-refrigeration compartment respectively.
  • the compression refrigeration system 20 also includes an optional The first switching valve 241 of one of the freezing throttling device 23 , at least one non-refrigerating branch circuit and the straight-through pipeline 243 is conductively connected.
  • the refrigerating and freezing device 1 further 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 implement the control method described in any of the above embodiments when executed by the processor 41.
  • the first switching valve 241 is electrically connected with the control device 40 to operate under the control of the control device 40 .
  • a straight-through pipeline 243 without any throttling element is connected in parallel at both ends of the freezing throttling device 23 .
  • the first switch valve 241 is restored to the state of conducting the non-refrigerated branch corresponding to the non-refrigerated compartment in the refrigeration state.
  • the temperature of the refrigerated evaporator 22 is raised very quickly, that is, the cut-off time of the non-refrigerated branch is relatively short, which reduces the impact on the cooling efficiency of the non-refrigerated compartment;
  • the evaporator temperature of the refrigerated evaporator 22 was increased to a temperature higher than that of the refrigerated compartment 11, the external water vapor and the moisture in the refrigerated compartment 11 (such as the volatilized moisture of the food) would enter the refrigerated compartment 11 through the door seal. Condensation will be condensed in the lower temperature freezer compartment 11 instead of condensing at the freezer evaporator 22 , effectively maintaining or increasing the moisture content in the freezer compartment 11 so as to maintain or increase the humidity in the freezer compartment 11 .
  • the refrigerating and freezing device 1 also includes a refrigerating fan 31 connected to the control device 40, and the refrigerating fan 31 is configured to be between the temperature of the evaporator of the refrigerating evaporator 22 and the temperature of the compartment in the refrigerating compartment 11 during non-refrigerating refrigeration.
  • the temperature difference reaches the preset minimum temperature difference, it is controlled to start, so as to promote the air flow to circulate between the freezing evaporator 22 and the freezing compartment 11, and improve the humidification efficiency in the freezing compartment 11.
  • the compression refrigeration system 20 also includes a bypass line 244 connected in parallel to both ends of the refrigeration evaporator 22, and the refrigeration and freezing device 1 further includes a second switching valve 245 connected to the control device 40, and the second switching valve 245 is configured to When the temperature difference between the evaporator temperature of the refrigerated evaporator 22 and the temperature of the compartment in the freezer compartment 11 reaches the preset minimum temperature difference, the bypass line 244 is controlled, and the humidity of the compartment in the freezer compartment 11 reaches Controlled reactivation of the refrigeration evaporator 22 at a preset maximum humidity.
  • 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,冷藏冷冻装置具有冷冻间室(11)和至少一个非冷冻间室,且压缩制冷系统(20)包括依次串联成回路的压缩机(21)、冷凝器(29)、冷冻节流装置(23)和冷冻蒸发器(22),冷冻节流装置(23)的两端并联有至少一个非冷冻支路、以及一经过节流或未经过节流的管路(243),压缩制冷系统(20)还包括用于选择性地导通冷冻节流装置(23)、至少一个非冷冻支路以及该管路(243)中的一个或多个第一切换阀(241)。控制方法包括:当冷藏冷冻装置处于任意非冷冻间室制冷的状态时,获取冷冻间室(11)的间室湿度;以及当冷冻间室(11)的间室湿度小于预设最低湿度时,将第一切换阀(241)调节至至少导通该管路(243)从而降低制冷剂节流程度的状态,以将冷冻蒸发器(22)的蒸发器温度提升至高于冷冻间室(11)内的间室温度。

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,冷冻室的湿度较小,长时间储存在冷冻室内的肉类等食材的水分损失严重,储存效果差,不但会影响食材的口感,而且还会造成食材营养的流失,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,提供一种无需在冷藏冷冻装置内增加复杂的加湿装置即可对冷冻间室进行保湿或加湿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在满足非冷冻间室制冷需求的前提下对冷冻间室进行保湿或加湿。
本发明第一方面的一个再进一步的目的是在不过度地影响制冷间室温度的情况下提高制冷间室的加湿效率。
本发明第一方面的另一个进一步的目的是在对非冷冻间室制冷效率影响较小的前提下对冷冻间室进行保湿或加湿。
本发明第一方面的另一个再进一步的目的是避免冷冻间室内的湿度产生较大的波动。
本发明第二方面的目的是提供一种无需在冷藏冷冻装置内增加复杂的加湿装置即可对冷冻间室进行保湿或加湿的冷藏冷冻装置。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箱体和压缩制冷系统,所述箱体内限定有冷冻间室和至少一个非冷冻间室,所述压缩制冷系统包括依次串联成回路的压缩机、冷凝器、冷冻节流装置和冷冻蒸发器,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、以及一经过节流或未经过节流的管路,所述压缩制冷系统还包括用于选择性地导通所述冷冻节流装置、所述至少一个非冷冻支路以及所述管路中的一个或多个的第一切换阀;所述控制方法包括:
当所述冷藏冷冻装置处于任一非冷冻间室制冷的状态时,获取所述冷冻间室内的间室湿度;以及
当所述冷冻间室内的间室湿度小于预设最低湿度时,将所述第一切换阀调节至至少导通所述管路从而使得相比仅导通所述非冷冻支路时使制冷剂的节流程度更低的状态,以将所述冷冻蒸发器的蒸发器温度提升至高于所述冷冻间室内的间室温度。
可选地,所述管路为具有一个附加节流阀的节流支路;且
当所述冷冻间室内的间室湿度小于预设最低湿度时,将所述第一切换阀调节至至少导通所述管路从而使得相比仅导通所述非冷冻支路时使制冷剂的节流程度更低的状态的 步骤包括:
当所述冷冻间室内的间室湿度小于预设最低湿度时,将所述第一切换阀调节至同时导通所述节流支路和处于制冷状态的非冷冻间室对应的非冷冻支路的状态。
可选地,在将所述第一切换阀调节至同时导通所述节流支路和处于制冷状态的非冷冻间室对应的非冷冻支路的状态之后,所述控制方法还包括:
获取所述冷冻蒸发器的蒸发器温度与所述冷冻间室内的间室温度;以及
当所述冷冻蒸发器的蒸发器温度与所述冷冻间室内的间室温度之间的温差尚未达到第一预设最小温差时增大所述附加节流阀的开度,以使得所述冷冻蒸发器的蒸发器温度与所述冷冻间室内的间室温度之间的温差达到所述第一预设最小温差;其中
所述第一预设最小温差大于零。
可选地,所述冷藏冷冻装置还包括用于向所述冷冻间室驱动送风的冷冻风机;且所述控制方法还包括:
当所述冷冻蒸发器的蒸发器温度与所述冷冻间室内的间室温度之间的温差达到所述第一预设最小温差时,启动所述冷冻风机,以促使气流在所述冷冻蒸发器和所述冷冻间室之间循环流动。
可选地,在启动所述冷冻风机之后,所述控制方法还包括:
再次获取所述冷冻间室内的间室湿度;以及
若再次获取的所述冷冻间室内的间室湿度达到预设最高湿度,则逐次地减小所述附加节流阀的开度,直至所述冷冻间室内的间室温度与所述冷冻蒸发器的蒸发器温度之间的温差达到第二预设最小温差时保持所述附加节流阀的开度不变,其中所述第二预设最小温差大于零。
可选地,所述管路为未经过节流的直通管路;且
当所述冷冻间室内的间室湿度小于预设最低湿度时,将所述第一切换阀调节至至少导通所述管路从而使得相比仅导通所述非冷冻支路时使制冷剂的节流程度更低的状态的步骤包括:
当所述冷冻间室内的间室湿度小于预设最低湿度时,将所述第一切换阀调节至导通所述直通管路的状态,直至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后再将所述第一切换阀恢复至导通处于制冷状态的所述非冷冻间室对应的非冷冻支路的状态。
可选地,所述冷冻蒸发器的两端并联有一旁通管路,所述压缩制冷系统还包括用于选择性地导通所述冷冻蒸发器和所述旁通管路中的其中之一的第二切换阀;且
在将所述第一切换阀调节至导通所述直通管路的状态后,所述控制方法还包括:
当所述冷冻蒸发器的蒸发器温度与所述冷冻间室内的间室温度之间的温差达到第一预设最小温差时,将所述第一切换阀恢复至导通处于制冷状态的所述非冷冻间室对应的非冷冻支路的状态,并将所述第二切换阀调节至导通所述旁通管路的状态;其中
所述第一预设最小温差大于零。
可选地,所述冷藏冷冻装置还包括用于向所述冷冻间室驱动送风的冷冻风机;且
当所述冷冻蒸发器的蒸发器温度与所述冷冻间室内的间室温度之间的温差达到所述第一预设最小温差时,所述控制方法还包括:
启动所述冷冻风机,以促使气流在所述冷冻蒸发器和所述冷冻间室之间循环流动。
可选地,在启动所述冷冻风机之后,所述控制方法还包括:
再次获取所述冷冻间室内的间室湿度;以及
若再次获取的所述冷冻间室内的间室湿度达到预设最高湿度,则将所述第二切换阀恢复至导通所述冷冻蒸发器的状态。
可选地,在启动所述冷冻风机之后,所述控制方法还包括:
保持所述冷冻风机持续运行,直至处于制冷状态的所述非冷冻间室内的间室温度达 到其设定的关机点温度。
可选地,所述第一预设最小温差为范围在1~5℃之间的任一温差值。
可选地,所述第二预设最小温差为范围在1~3℃之间的任一温差值。
可选地,所述预设最低湿度为范围在60%~70%之间的任一相对湿度值;且/或
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,当所述冷藏冷冻装置处于任一非冷冻间室制冷的状态时,所述冷冻风机的转速小于所述冷冻风机在所述冷藏冷冻装置处于冷冻间室制冷状态时的设定转速。
可选地,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节流装置和冷藏蒸发器;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节流装置和变温蒸发器。
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:
箱体,其内限定有冷冻间室和至少一个非冷冻间室;
压缩制冷系统,包括依次串联成回路的压缩机、冷凝器、冷冻节流装置和冷冻蒸发器,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、以及一经过节流或未经过节流的管路,所述压缩制冷系统还包括用于选择性地导通所述冷冻节流装置、所述至少一个非冷冻支路以及所述管路中的一个或多个的第一切换阀;以及
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。
本发明的冷藏冷冻装置特别地在冷冻节流装置的两端并联一一经过节流或未经过节流的管路。在非冷冻间室制冷期间,首先获取冷冻间室内的间室湿度,在冷冻间室内的间室湿度小于预设最低湿度时将第一切换阀调节至至少导通该管路从而使得相比仅导通非冷冻支路时使制冷剂的节流程度更低的状态。由此,节流程度更低的制冷剂流向冷冻蒸发器会使冷冻蒸发器的蒸发器温度升高,当冷冻蒸发器的蒸发器温度提高至高于冷冻间室的间室温度时,通过门封进入冷冻间室内的外界水汽以及冷冻间室内的水分(例如食材挥发的水分)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,有效地保持或提高了冷冻间室内的水分含量从而保持或提高了冷冻间室内的湿度。由此,无需在冷藏冷冻装置内增加复杂的加湿装置即可实现对冷冻间室的保湿或加湿。
进一步地,该管路为具有附加节流阀的节流支路,即,本发明的冷藏冷冻装置特别地在冷冻节流装置的两端并联一具有附加节流阀的节流支路。在非冷冻间室制冷期间,首先获取冷冻间室内的间室湿度,在冷冻间室内的间室湿度小于预设最低湿度时将第一切换阀调节至同时导通节流支路和正在进行制冷的非冷冻间室对应的非冷冻支路,以使得部分制冷剂流经附加节流阀,另一部分制冷剂流经正在进行制冷的非冷冻间室对应的非冷冻节流装置和非冷冻蒸发器。由此,流向冷冻蒸发器的制冷剂包括经过两个支路不同节流程度后的制冷剂,一方面,满足了非冷冻间室的制冷需求,另一方面,流经节流支路的节流程度低的制冷剂流向冷冻蒸发器会使冷冻蒸发器的蒸发器温度升高,当冷冻蒸发器的蒸发器温度提高至高于冷冻间室的间室温度时,通过门封进入冷冻间室内的外界水汽以及冷冻间室内的水分(例如食材挥发的水分)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,有效地保持或提高了冷冻间室内的水分含量从而保持或提高了冷冻间室内的湿度。
进一步地,考虑到冷冻间室内的温度,冷冻蒸发器的蒸发器温度不能过于高于冷冻间室内的间室温度。因此,本发明预设了一个较佳的冷冻蒸发器的蒸发器温度与冷冻间室内的间室温度之间的温差值,即第一预设最小温差,并通过调节附加节流阀的开度使得冷冻蒸发器的蒸发器温度与冷冻间室内的间室温度之间的温差值快速地达到第一预设最小温差,由此,既能够快速地起到明显的加湿作用,提高了加湿效率,又不会过度地 影响冷冻间室内的间室温度。
进一步地,该管路为没有任何节流元件的直通管路,即,本发明的冷藏冷冻装置特别地在冷冻节流装置的两端并联一没有任何节流元件的直通管路。在非冷冻间室制冷期间,首先获取冷冻间室内的间室湿度,在冷冻间室内的间室湿度小于预设最低湿度时将第一切换阀调节至导通直通管路的状态,以使得制冷剂不经过任何节流直接流向冷冻蒸发器,从而快速地提高冷冻蒸发器的蒸发器温度,使得冷冻蒸发器的蒸发器温度在短时间内高于冷冻间室内的间室温度,此时再将第一切换阀恢复至导通处于制冷状态的非冷冻间室对应的非冷冻支路的状态。一方面,因直通管路的设置使得冷冻蒸发器的温度提升速度非常快,也即是非冷冻支路的切断时间较短,减小了对非冷冻间室制冷效率的影响;另一方面,当冷冻蒸发器的蒸发器温度提高至高于冷冻间室的间室温度时,通过门封进入冷冻间室内的外界水汽以及冷冻间室内的水分(例如食材挥发的水分)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,有效地保持或提高了冷冻间室内的水分含量从而保持或提高了冷冻间室内的湿度。
进一步地,当制冷剂流路切换至非冷冻支路后,冷冻蒸发器的蒸发器温度可能会再次降低至低于冷冻间室内的间室温度,导致冷冻间室内的间室湿度降低。为此,本发明进一步在冷冻蒸发器的两端并联一旁通管路。当冷冻蒸发器的蒸发器温度与冷冻间室内的间室温度之间的温差值达到预设最小温差时,不但将将第一切换阀恢复至导通处于制冷状态的非冷冻间室对应的非冷冻支路的状态,而且还将第二切换阀切换至导通旁通管路的状态,以阻止制冷剂流经冷冻蒸发器,由此,冷冻蒸发器的蒸发器温度可维持在比冷冻间室内的间室温度高预设最小温差的状态,以持续地发挥比较明显的加湿作用,避免了冷冻间室内的湿度因非冷冻间室的继续制冷而产生波动。
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启动冷冻风机之后的示意性流程图;
图6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;
图7是根据本发明另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8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9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10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11是根据本发明再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12是根据本发明又再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13是根据本发明另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,冷藏冷冻装置1包括箱体10和压缩制冷系统20。
箱体10内限定有冷冻间室11和至少一个非冷冻间室。可以理解的是,冷冻间室11为用作冷冻的储物间室,非冷冻间室为用作非冷冻的储物间室,例如非冷冻间室可以为用作冷藏或变温的储物间室。通常情况下,非冷冻间室内的温度高于冷冻间室11内的温度。
压缩制冷系统20包括依次串联成回路的压缩机21、冷凝器29、冷冻节流装置23和冷冻蒸发器22,冷冻节流装置23具体可以为毛细管或节流阀等。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、以及一经过节流或未经过节流的管路243。压缩制冷系统20还包括用于选择性地导通冷冻节流装置23、至少一个非冷冻支路以及管路243中的一个或多个的切换阀241(不妨称为第一切换阀241)。也就是说,第一切换阀241可以仅导通冷冻节流装置23、至少一个非冷冻支路以及管路243中的其中一个支路,以使得从冷凝器29流出的制冷剂仅流经该支路后流向冷冻蒸发器22;第一切换阀241也可以导通冷冻节流装置23、至少一个非冷冻支路以及管路243中的两个或两个以上的支路,以使得从冷凝器29流出的制冷剂分流到该两个或两个以上的支路后流向冷冻蒸发器22。
相应地,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处于任一非冷冻间室制冷的状态时,获取冷冻间室11内的间室湿度;以及
当冷冻间室11内的间室湿度小于预设最低湿度时,将第一切换阀241调节至至少导通管路243从而使得相比仅导通非冷冻支路时使制冷剂的节流程度更低的状态,以将冷冻蒸发器22的蒸发器温度提升至高于冷冻间室11内的间室温度。
本发明的冷藏冷冻装置1特别地在冷冻节流装置23的两端并联一一经过节流或未经过节流的管路243。在非冷冻间室制冷期间,首先获取冷冻间室11内的间室湿度,在冷冻间室11内的间室湿度小于预设最低湿度时将第一切换阀241调节至至少导通该管路243从而使得相比仅导通非冷冻支路时使制冷剂的节流程度更低的状态。由此,节流程度更低的制冷剂流向冷冻蒸发器22会使冷冻蒸发器22的蒸发器温度升高,当冷冻蒸发器22的蒸发器温度提高至高于冷冻间室11的间室温度时,通过门封进入冷冻间室11内的外界水汽以及冷冻间室内的水分(例如食材挥发的水分)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,有效地保持或提高了冷冻间室11内的水分含量从而保持或提高了冷冻间室11内的湿度。由此,无需在冷藏冷冻装置内增加复杂的加湿装置即可实现对冷冻间室的保湿或加湿。
在一个进一步的实施例中,继续参见图2,管路243是具有一个附加节流阀242的节流支路243。也就是说,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、以及具有一个附加节流阀242的节流支路243,压缩制冷系统20还包括用于选择性地导通冷冻节流装置23、至少一个非冷冻支路以及节流支路243中的一个或多个的第一切换阀241。也就是说,第一切换阀241可以仅导通冷冻节流装置23、至少一个非冷冻支路以及节流支路243中的其中一个支路,以使得从冷凝器29流出的制冷剂仅流经该支路后流向冷冻蒸发器22;第一切换阀241也可以导通冷冻节流装置23、至少一个非冷冻支路以及节流支路243中的两个或两个以上的支路,以使得从冷凝器29流出的制冷剂分流到该两个或两个以上的支路后流向冷冻蒸发器22。
具体地,每个非冷冻支路均可包括串联的非冷冻节流装置和非冷冻蒸发器。需要说明的是,本发明所说的串联、并联分别指的是制冷剂流路在物理上的串联、并联,而不是电路结构的串联、并联。
当冷藏冷冻装置1处于非冷冻间室制冷的状态时,第一切换阀241的状态设置成仅连通冷凝器29和该非冷冻间室对应的非冷冻支路,此时,从压缩机21流出的制冷剂依 次经过冷凝器29、第一切换阀241、非冷冻支路的非冷冻蒸发器和非冷冻节流装置、冷冻蒸发器22,最后返回到压缩机21。当冷藏冷冻装置1处于冷冻间室制冷的状态时,第一切换阀241的状态设置成连通冷凝器29和冷冻节流装置23,此时,从压缩机21流出的制冷剂依次经过冷凝器29、第一切换阀241、冷冻节流装置23和冷冻蒸发器22,最后返回到压缩机21。
在一些实施例中,至少一个非冷冻间室包括冷藏间室12,至少一个非冷冻支路包括冷藏支路,冷藏支路包括串联连接的冷藏节流装置26和冷藏蒸发器25,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。
申请人认识到,冷冻间室11不是一个绝对封闭的间室。外界携带水分的空气会通过冷冻间室11的门封进入冷冻间室11内;冷冻间室11内部的尚未冻结的食材会挥发出一定的水分;在冷冻间室11内的食材冻结后,食材表面的水分会有少量升华;冷冻蒸发器22表面形成的凝霜也会有少量升华。也就是说,冷藏冷冻装置1内原本就具有多种能够用作对冷冻间室11进行保湿或加湿的水分来源。若能够将这些水分有效地用作对冷冻间室11进行保湿或加湿,那么就完全不需要设置任何其他的加湿装置。
申请人进一步认识到,对于风冷式的冷藏冷冻装置1来说,其储物间室内很少产生凝霜,凝霜基本产生在蒸发器上。这是因为蒸发器的温度普遍比储物间室的温度低。也就是说,水汽通常会在温度更低的位置聚集、凝结。那么,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,水汽就会聚集在冷冻间室11内,就可以有效地对冷冻间室11进行保湿或提高冷冻间室内的湿度。
为此,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处于任一非冷冻间室制冷的状态时,获取冷冻间室11内的间室湿度;以及
当冷冻间室11内的间室湿度小于预设最低湿度时,将第一切换阀241调节至同时导通节流支路243和处于制冷状态的非冷冻间室对应的非冷冻支路的状态,以将冷冻蒸发器22的蒸发器温度提升至高于冷冻间室11内的间室温度。
本发明的冷藏冷冻装置1特别地在冷冻节流装置23的两端并联一具有附加节流阀242的节流支路243。在非冷冻间室制冷期间,首先获取冷冻间室11内的间室湿度,在冷冻间室11内的间室湿度小于预设最低湿度时将第一切换阀241调节至同时导通节流支路243和正在进行制冷的非冷冻间室对应的非冷冻支路,以使得部分制冷剂流经附加节流阀242,另一部分制冷剂流经正在进行制冷的非冷冻间室对应的非冷冻节流装置和非冷冻蒸发器。由此,流向冷冻蒸发器22的制冷剂包括经过两个支路不同节流程度节流后的制冷剂,一方面,满足了非冷冻间室的制冷需求,另一方面,流经节流支路243的节流程度低的制冷剂流向冷冻蒸发器22会使冷冻蒸发器22的蒸发器温度升高,当冷冻蒸发器22的蒸发器温度提高至高于冷冻间室11的间室温度时,通过门封进入冷冻间室11内的外界水汽以及冷冻间室11内的水分(例如食材挥发的水分)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,有效地保持或提高了冷冻间室11内的水分含量从而保持或提高了冷冻间室11内的湿度。
本发明利用冷藏冷冻装置1内部自身的水分实现冷冻间室11的加湿保湿,设计方案与现有技术所采用的方案完全不同,设计思路非常新颖,且效果显著,实际应用的前景较好。
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,当冷藏冷冻装置1处于任一非冷冻间室制冷的状态时,获取冷冻间室11内的间室湿度;
步骤S20,判断冷冻间室11内的间室湿度是否小于预设最低湿度;若是,则转步骤S30;若否,则返回重新获取冷冻间室11内的间室湿度;
步骤S30,将切换阀241(也称为第一切换阀241)调节至同时导通节流支路243和处于制冷状态的非冷冻间室对应的非冷冻支路的状态,以将冷冻蒸发器22的蒸发器温度提升至高于冷冻间室11内的间室温度。
在一些实施例中,在将切换阀241调节至同时导通节流支路243和处于制冷状态的非冷冻间室对应的非冷冻支路的状态之后,本发明的控制方法还包括:
获取冷冻蒸发器22的蒸发器温度与冷冻间室11内的间室温度;以及
当冷冻蒸发器22的蒸发器温度与冷冻间室11内的间室温度之间的温差尚未达到第一预设最小温差时增大附加节流阀242的开度,以使得冷冻蒸发器22的蒸发器温度与冷冻间室11内的间室温度之间的温差达到第一预设最小温差。
其中,第一预设最小温差大于零。
考虑到冷冻间室11内的温度,冷冻蒸发器22的蒸发器温度不能过于高于冷冻间室11内的间室温度。因此,本发明预设了一个较佳的冷冻蒸发器22的蒸发器温度与冷冻间室11内的间室温度之间的温差值,即第一预设最小温差,并通过调节附加节流阀242的开度使得冷冻蒸发器22的蒸发器温度与冷冻间室11内的间室温度之间的温差值快速地达到第一预设最小温差,由此,既能够快速地起到明显的加湿作用,提高了加湿效率,又不会过度地影响冷冻间室11内的间室温度。
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,在将切换阀241调节至同时导通节流支路243和处于制冷状态的非冷冻间室对应的非冷冻支路的状态之后,本发明的控制方法还包括:
步骤S40,获取冷冻蒸发器22的蒸发器温度与冷冻间室11内的间室温度;
步骤S50,判断冷冻蒸发器22的蒸发器温度与冷冻间室11内的间室温度之间的温差是否达到第一预设最小温差;若否,则转步骤S60;
步骤S60,增大附加节流阀242的开度,并返回步骤S40以再次获取冷冻蒸发器22的蒸发器温度与冷冻间室11内的间室温度。
在一些实施例中,冷藏冷冻装置1还包括用于向冷冻间室11驱动送风的冷冻风机31。可以理解的是,当冷藏冷冻装置1处于任一非冷冻间室制冷的状态时,冷冻风机31通常处于停止状态。在这些实施例中,参见图4,本发明的控制方法还包括:
当冷冻蒸发器22的蒸发器温度与冷冻间室11内的间室温度之间的温差达到第一预设最小温差时,转步骤S70;
步骤S70,启动冷冻风机31,以促使气流在冷冻蒸发器22和冷冻间室11之间循环流动。
本发明在非冷冻间室制冷期间将冷冻风机31设置成在冷冻间室11内的间室湿度小于预设最低湿度且冷冻蒸发器22的蒸发器温度与冷冻间室11的间室温度之间的温差达到第一预设最小温差时启动运行,能够通过冷冻风机31促使冷冻蒸发器22表面的部分结霜快速升华,并使得升华形成的水汽快速进入温度更低的冷冻间室11,进一步提高了冷冻间室11的加湿速率。
在一些实施例中,在启动冷冻风机31之后,本发明的控制方法还包括:
再次获取冷冻间室11内的间室湿度;以及
若再次获取的冷冻间室11内的间室湿度达到预设最高湿度,则逐次地减小附加节流阀242的开度,直至冷冻间室11内的间室温度与冷冻蒸发器22的蒸发器温度之间的温差达到第二预设最小温差时保持附加节流阀242的开度不变,其中第二预设最小温差大于零。
在冷冻间室11内的间室湿度达到预设最高湿度时,冷冻间室11内的间室湿度已经相当高了,非常适宜于食材的优质保存,不需要再对冷冻间室11进行加湿操作。此时, 本发明逐次地减小附加节流阀242的开度,以使得冷冻蒸发器22的蒸发器温度逐渐降低,避免附加节流阀242的开度调节幅度过大导致冷冻蒸发器22的蒸发器温度降低的速度和幅度不受控再次引起冷冻间室11内的间室湿度明显降低的现象。当冷冻蒸发器22的蒸发器温度降低至比冷冻间室11内的间室温度低第二预设最小温差时保持附加节流阀242的开度不变,此时,冷冻蒸发器22的蒸发器温度稍低于冷冻间室11内的间室温度,既能够适当地调节冷冻间室11内的温度,又不会引起冷冻间室11内的湿度明显降低,方案设计更加合理。
具体地,参见图5所示的根据本发明一个具体实施例的启动冷冻风机之后的示意性流程图,在启动冷冻风机31之后,本发明的控制方法还包括:
步骤S80,再次获取冷冻间室11内的间室湿度;以及
步骤S90,判断再次获取的冷冻间室11内的间室湿度是否达到预设最高湿度;若是,则转步骤S100;若否,则返回步骤S80以继续获取冷冻间室11内的间室湿度;
步骤S100,减小附加节流阀242的开度;
步骤S110,再次获取冷冻蒸发器22的蒸发器温度与冷冻间室11内的间室温度;
步骤S120,判断再次获取的冷冻间室11内的间室温度与冷冻蒸发器22的蒸发器温度之间的温差是否达到第二预设最小温差;若是,则转步骤S130;若否,则转步骤S100,以再次减小附加节流阀242的开度。
步骤S130,保持附加节流阀242的开度不变。
具体地,附加节流阀242的开度可以保持到正在制冷的非冷冻间室内的间室温度达到其设定的关机点温度,即持续到正在制冷的非冷冻间室制冷结束。
在一些实施例中,在启动冷冻风机31之后,本发明的控制方法还包括:
保持冷冻风机31持续运行,直至处于制冷状态的非冷冻间室内的间室温度达到其设定的关机点温度。
也就是说,冷冻风机31启动后可以一直持续运转到正在制冷的非冷冻间室制冷结束。这是因为,当冷冻间室11内的间室湿度未达到预设最高湿度时,冷冻风机31运行可以促使冷冻蒸发器22上的凝霜快速升华,并使得升华形成的水汽聚集在冷冻间室11内以进一步提高冷冻间室11的加湿效率。当冷冻间室11内的间室湿度达到预设最高湿度后,冷冻蒸发器22的蒸发器温度稍低于冷冻间室11内的间室温度,此时冷冻风机31持续运行可以将温度约等于或稍低于冷冻间室11内的间室温度的冷却气流输送至冷冻间室11内,有助于将冷冻间室11内的间室温度维持在较佳的范围内。
在一些实施例中,当冷藏冷冻装置1处于任一非冷冻间室制冷的状态时,冷冻风机31的转速小于冷冻风机31在冷藏冷冻装置1处于冷冻间室制冷状态时的设定转速。这样,既可以将冷冻蒸发器22上的部分凝霜升华形成的水汽较快地送入冷冻间室11,又可以避免较多的温度相对较高的气流进入冷冻间室11导致冷冻间室11内温度回升较多。
在一些实施例中,上述第一预设最小温差为范围在1~5℃之间的任一温差值。例如,第一预设最小温差可以取值1℃、2℃、3℃、4℃或5℃。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1~5℃时启动冷冻风机31,此时,通过冷冻风机31吹向冷冻间室11的气流温度比较合适,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,上述第二预设最小温差为范围在1~3℃之间的任一温差值。例如,第二预设最小温差可以取值1℃、2℃或3℃。也就是说,当冷冻蒸发器22的蒸发器温度比冷冻间室11内的间室温度低1~3℃时保持附加节流阀242的开度不变,此时,既能够向冷冻间室11内输送温度稍低的冷却气流,又可以避免冷冻间室11内的湿度明显降低。
在一些实施例中,上述预设最低湿度为范围在60%~70%之间的任一相对湿度值。例如,该预设最低湿度阈值可以为60%、61%、62%、63%、64%、65%、66%、67%、68%、69%或70%。若冷冻间室11内的湿度低于此范围,会对食材品质产生影响。若该 预设最低湿度的值过小,则在冷冻间室11内的湿度已经很低时,仍然达不到冷冻间室11的加湿启动条件,冷冻间室11内的食材品质会因湿度过低而受到影响,不能够对冷冻间室11进行实质的、长期的保湿加湿操作。若该预设最低湿度过大,很容易达到冷冻间室11的加湿启动条件,导致第一切换阀241切换制冷剂流路的时间过早、过长而影响非冷冻间室的制冷。
在一些实施例中,预设最高湿度为范围在80%~100%之间的任一相对湿度值。例如,该预设最高湿度可以为80%、85%、90%、95%或100%。在此范围内,冷冻间室11内的湿度尚未饱和、接近饱和或刚好饱和,冷冻间室11内的水汽不会或者不易凝结,保湿效果或加湿效果较好,食材的保存效果较好。此时不需要再继续对冷冻间室11内高效地加湿,因此,此时调节附加节流阀242的开度,促使冷冻蒸发器22的温度降低至稍低于冷冻间室11的温度,有利于及时地维持冷冻间室11内的温度,避免冷冻间室11内的温度过度升高而影响食材的保存品质。
本发明还提供一种冷藏冷冻装置。参见图1和图2,本发明的冷藏冷冻装置1包括箱体10和压缩制冷系统20。
箱体10内限定有冷冻间室11和至少一个非冷冻间室。
压缩制冷系统20包括依次串联成回路的压缩机21、冷凝器29、冷冻节流装置23和冷冻蒸发器22。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、以及一经过节流或未经过节流的管路243。压缩制冷系统20还包括用于选择性地导通冷冻节流装置23、至少一个非冷冻支路以及管路243中的一个或多个的第一切换阀241。
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。
图6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6,在一个进一步的实施例中,本发明的冷藏冷冻装置1包括箱体10和压缩制冷系统20。
箱体10内限定有冷冻间室11和至少一个非冷冻间室。
压缩制冷系统20包括依次串联成回路的压缩机21、冷凝器29、冷冻节流装置23和冷冻蒸发器22。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、以及具有一个附加节流阀242的节流支路243,压缩制冷系统20还包括用于选择性地导通冷冻节流装置23、至少一个非冷冻支路以及节流支路243中的一个或多个的第一切换阀241。
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,第一切换阀241和附加节流阀242均与控制装置40电连接,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。
本发明实施例的冷藏冷冻装置1特别地在冷冻节流装置23的两端并联一具有附加节流阀242的节流支路243。在非冷冻间室制冷期间,首先获取冷冻间室11内的间室湿度,在冷冻间室11内的间室湿度小于预设最低湿度时将第一切换阀241调节至同时导通节流 支路243和正在进行制冷的非冷冻间室对应的非冷冻支路,以使得部分制冷剂流经附加节流阀242,另一部分制冷剂流经正在进行制冷的非冷冻间室对应的非冷冻节流装置和非冷冻蒸发器。由此,流向冷冻蒸发器22的制冷剂包括经过两个支路不同节流程度节流后的制冷剂,一方面,满足了非冷冻间室的制冷需求,另一方面,流经节流支路243的节流程度低的制冷剂流向冷冻蒸发器22会使冷冻蒸发器22的蒸发器温度升高,当冷冻蒸发器22的蒸发器温度提高至高于冷冻间室11的间室温度时,通过门封进入冷冻间室11内的外界水汽以及冷冻间室11内的水分(例如食材挥发的水分)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,有效地保持或提高了冷冻间室11内的水分含量从而保持或提高了冷冻间室11内的湿度。
进一步地,冷藏冷冻装置1还包括与控制装置40相连的冷冻风机31,冷冻风机31配置成在非冷冻制冷期间当冷冻蒸发器22的蒸发器温度与冷冻间室11内的间室温度之间的温差达到第一预设最小温差时受控地启动,以促使气流在冷冻蒸发器22和冷冻间室11之间循环流动,提高了冷冻间室11内的加湿效率。
本发明还提供另一种冷藏冷冻装置的控制方法,图7是根据本发明另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7,冷藏冷冻装置1包括箱体10和压缩制冷系统20。
箱体10内限定有冷冻间室11和至少一个非冷冻间室。可以理解的是,冷冻间室11为用作冷冻的储物间室,非冷冻间室为用作非冷冻的储物间室,例如非冷冻间室可以为用作冷藏或变温的储物间室。通常情况下,非冷冻间室内的温度高于冷冻间室11内的温度。
压缩制冷系统20包括依次串联成回路的压缩机21、冷凝器29、冷冻节流装置23和冷冻蒸发器22,冷冻节流装置23具体可以为毛细管或节流阀等。本实施例中,管路243是一未经过节流的直通管路243,也就是说,冷冻节流装置23的两端并联有未经过节流的直通管路243和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还包括用于选择性地导通冷冻节流装置23、至少一个非冷冻支路以及直通管路243中的其中一个的第一切换阀241。也就是说,第一切换阀241可以选择性地导通冷冻节流装置23、至少一个非冷冻支路以及节流支路243中的其中一个支路,以使得从冷凝器29流出的制冷剂仅流经该支路后流向冷冻蒸发器22。
具体地,每个非冷冻支路均可包括串联的非冷冻节流装置和非冷冻蒸发器。需要说明的是,本发明所说的串联、并联分别指的是制冷剂流路在物理上的串联、并联,而不是电路结构的串联、并联。
当冷藏冷冻装置1处于非冷冻间室制冷的状态时,第一切换阀241的状态设置成仅连通冷凝器29和该非冷冻间室对应的非冷冻支路,此时,从压缩机21流出的制冷剂依次经过冷凝器29、第一切换阀241、非冷冻支路的非冷冻蒸发器和非冷冻节流装置、冷冻蒸发器22,最后返回到压缩机21。当冷藏冷冻装置1处于冷冻间室制冷的状态时,第一切换阀241的状态设置成连通冷凝器29和冷冻节流装置23,此时,从压缩机21流出的制冷剂依次经过冷凝器29、第一切换阀241、冷冻节流装置23和冷冻蒸发器22,最后返回到压缩机21。
在一些实施例中,至少一个非冷冻间室包括冷藏间室12,至少一个非冷冻支路包括冷藏支路,冷藏支路包括串联连接的冷藏节流装置26和冷藏蒸发器25,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。
申请人认识到,冷冻间室11不是一个绝对封闭的间室。外界携带水分的空气会通过冷冻间室11的门封进入冷冻间室11内;冷冻间室11内部的尚未冻结的食材会挥发出一定的水分;在冷冻间室11内的食材冻结后,食材表面的水分会有少量升华;冷冻蒸发器 22表面形成的凝霜也会有少量升华。也就是说,冷藏冷冻装置1内原本就具有多种能够用作对冷冻间室11进行保湿或加湿的水分来源。若能够将这些水分有效地用作对冷冻间室11进行保湿或加湿,那么就完全不需要设置任何其他的加湿装置。
申请人进一步认识到,对于风冷式的冷藏冷冻装置1来说,其储物间室内很少产生凝霜,凝霜基本产生在蒸发器上。这是因为蒸发器的温度普遍比储物间室的温度低。也就是说,水汽通常会在温度更低的位置聚集、凝结。那么,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,水汽就会聚集在冷冻间室11内,就可以有效地对冷冻间室11进行保湿或提高冷冻间室内的湿度。
为此,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处于任一非冷冻间室制冷的状态时,获取冷冻间室11内的间室湿度;以及
当冷冻间室11内的间室湿度小于预设最低湿度时,将第一切换阀241调节至导通直通管路243的状态,直至冷冻蒸发器22的蒸发器温度高于冷冻间室11内的间室温度后再将第一切换阀241恢复至导通处于制冷状态的非冷冻间室对应的非冷冻支路的状态。
本发明的冷藏冷冻装置1特别地在冷冻节流装置23的两端并联一没有任何节流元件的直通管路243。在非冷冻间室制冷期间,首先获取冷冻间室11内的间室湿度,在冷冻间室11内的间室湿度小于预设最低湿度时将第一切换阀241调节至导通直通管路243的状态,以使得制冷剂不经过任何节流直接流向冷冻蒸发器22,从而快速地提高冷冻蒸发器22的蒸发器温度,使得冷冻蒸发器22的蒸发器温度在短时间内高于冷冻间室11内的间室温度,此时再将第一切换阀241恢复至导通处于制冷状态的非冷冻间室对应的非冷冻支路的状态。一方面,因直通管路243的设置使得冷冻蒸发器22的温度提升速度非常快,也即是非冷冻支路的切断时间较短,减小了对非冷冻间室制冷效率的影响;另一方面,当冷冻蒸发器22的蒸发器温度提高至高于冷冻间室11的间室温度时,通过门封进入冷冻间室11内的外界水汽以及冷冻间室11内的水分(例如食材挥发的水分)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,有效地保持或提高了冷冻间室11内的水分含量从而保持或提高了冷冻间室11内的湿度。
本发明利用冷藏冷冻装置1内部自身的水分实现冷冻间室11的加湿保湿,设计方案与现有技术所采用的方案完全不同,设计思路非常新颖,且效果显著,实际应用的前景较好。
图8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8,本发明的控制方法包括:
步骤S10’,当冷藏冷冻装置1处于任一非冷冻间室制冷的状态时,获取冷冻间室11内的间室湿度;
步骤S20’,判断冷冻间室11内的间室湿度是否小于预设最低湿度;若是,则转步骤S30’;若否,则返回重新获取冷冻间室11内的间室湿度;
步骤S30’,将第一切换阀241调节至导通直通管路243的状态;
步骤S40’,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S50’,判断冷冻蒸发器22的蒸发器温度是否高于冷冻间室11内的间室温度;若是,则转步骤S60’;若否,则返回步骤S40’重新获取冷冻蒸发器22的蒸发器温度和冷冻间室11内的间室温度;
步骤S60’,将第一切换阀241恢复至导通处于制冷状态的非冷冻间室对应的非冷冻支路的状态。
图9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9,本发明的控制方法包括:
步骤S10’,当冷藏冷冻装置1处于任一非冷冻间室制冷的状态时,获取冷冻间室11内的间室湿度;
步骤S20’,判断冷冻间室11内的间室湿度是否小于预设最低湿度;若是,则转步骤S30’;若否,则返回重新获取冷冻间室11内的间室湿度;
步骤S30’,将第一切换阀241调节至导通直通管路243的状态;
步骤S40’,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S50”,判断冷冻蒸发器22的蒸发器温度与冷冻间室11内的间室温度之间的温差是否达到预设最小温差(也可称为第一预设最小温差);若是,则转步骤S60’;若否,则返回步骤S40’重新获取冷冻蒸发器22的蒸发器温度和冷冻间室11内的间室温度;其中,预设最小温差大于零,即冷冻蒸发器22的蒸发器温度高于冷冻间室11内的间室温度;
步骤S60’,将第一切换阀241恢复至导通处于制冷状态的非冷冻间室对应的非冷冻支路的状态。
考虑到冷冻间室11内的温度,冷冻蒸发器22的蒸发器温度不能过于高于冷冻间室11内的间室温度。因此,在另一些优选的实施例中,本发明预设了一个较佳的冷冻蒸发器22的蒸发器温度与冷冻间室内的间室温度之间的温差值,即大于零的预设最小温差。当冷冻蒸发器22的蒸发器温度比冷冻间室11内的间室温度高预设最小温差时将第一切换阀241恢复至导通处于制冷状态的非冷冻间室对应的非冷冻支路的状态,不但可以继续对非冷冻间室制冷,而且还可以对冷冻间室11进行有效加湿。
然而,当制冷剂流路切换至非冷冻支路后,冷冻蒸发器22的蒸发器温度可能会再次降低至低于冷冻间室11内的间室温度,导致冷冻间室11内的间室湿度降低。为此,在一些实施例中,冷冻蒸发器22的两端并联有一旁通管路244,压缩制冷系统20还包括用于选择性地导通冷冻蒸发器22和旁通管路244中的其中之一的第二切换阀245。可以理解的是,在冷冻间室制冷以及非冷冻间室正常制冷时,第二切换阀245均处于导通冷冻蒸发器22的状态。在这些实施例中,在将第一切换阀241调节至导通直通管路243的状态后,本发明的控制方法还包括:
当冷冻蒸发器22的蒸发器温度与冷冻间室11内的间室温度之间的温差达到预设最小温差(即第一预设最小温差)时,将第一切换阀241恢复至导通处于制冷状态的非冷冻间室对应的非冷冻支路的状态,并将第二切换阀245调节至导通旁通管路244的状态。
本发明进一步在冷冻蒸发器22的两端并联一旁通管路244。当冷冻蒸发器22的蒸发器温度与冷冻间室11内的间室温度之间的温差值达到第一预设最小温差时,不但将第一切换阀241恢复至导通处于制冷状态的非冷冻间室对应的非冷冻支路的状态,以继续对非冷冻间室进行制冷,而且还将第二切换阀245切换至导通旁通管路244的状态,以阻止制冷剂流经冷冻蒸发器22。由此,冷冻蒸发器22的蒸发器温度可维持在比冷冻间室11内的间室温度高第一预设最小温差的状态,以持续地发挥比较明显的加湿作用,避免了冷冻间室11内的湿度因非冷冻间室的继续制冷而产生波动。
具体地,图10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10,本发明的控制方法包括:
步骤S10’,当冷藏冷冻装置1处于任一非冷冻间室制冷的状态时,获取冷冻间室11内的间室湿度;
步骤S20’,判断冷冻间室11内的间室湿度是否小于预设最低湿度;若是,则转步骤S30’;若否,则返回重新获取冷冻间室11内的间室湿度;
步骤S30’,将第一切换阀241调节至导通直通管路243的状态;
步骤S40’,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S50”,判断冷冻蒸发器22的蒸发器温度与冷冻间室11内的间室温度之间的温差是否达到预设最小温差(即第一预设最小温差);若是,则转步骤S60”;若否,则返回步骤S40’重新获取冷冻蒸发器22的蒸发器温度和冷冻间室11内的间室温度;
步骤S60”,将第一切换阀241恢复至导通处于制冷状态的非冷冻间室对应的非冷冻 支路的状态,并将第二切换阀245调节至导通旁通管路244的状态。
在一些实施例中,冷藏冷冻装置1还包括用于向冷冻间室11驱动送风的冷冻风机31。可以理解的是,当冷藏冷冻装置1处于任一非冷冻间室制冷的状态时,冷冻风机31通常处于停止状态。在这些实施例中,本发明的控制方法还包括:
当冷冻蒸发器22的蒸发器温度与冷冻间室11内的间室温度之间的温差达到所述预设最小温差时,所述控制方法还包括:
启动冷冻风机31,以促使气流在冷冻蒸发器22和冷冻间室11之间循环流动。
具体地,图11是根据本发明再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11,本发明的控制方法包括:
步骤S10’,当冷藏冷冻装置1处于任一非冷冻间室制冷的状态时,获取冷冻间室11内的间室湿度;
步骤S20’,判断冷冻间室11内的间室湿度是否小于预设最低湿度;若是,则转步骤S30’;若否,则返回重新获取冷冻间室11内的间室湿度;
步骤S30’,将第一切换阀241调节至导通直通管路243的状态;
步骤S40’,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S50”,判断冷冻蒸发器22的蒸发器温度与冷冻间室11内的间室温度之间的温差是否达到预设最小温差(即第一预设最小温差);若是,则转步骤S60”’;若否,则返回步骤S40’重新获取冷冻蒸发器22的蒸发器温度和冷冻间室11内的间室温度;
步骤S60”’,将第一切换阀241恢复至导通处于制冷状态的非冷冻间室对应的非冷冻支路的状态,将第二切换阀245调节至导通旁通管路244的状态,并启动冷冻风机31。
本发明在非冷冻间室制冷期间将冷冻风机31设置成冷冻蒸发器22的蒸发器温度与冷冻间室11的间室温度之间的温差达到第一预设最小温差时启动运行,能够通过冷冻风机31促使冷冻蒸发器22表面的部分结霜快速升华,并使得升华形成的水汽快速进入温度更低的冷冻间室11,进一步提高了冷冻间室11的加湿速率。
在一些实施例中,在启动冷冻风机31之后,本发明的控制方法还包括:
再次获取冷冻间室11内的间室湿度;以及
若再次获取的冷冻间室11内的间室湿度达到预设最高湿度,则将第二切换阀245恢复至导通冷冻蒸发器22的状态,以允许制冷剂流经冷冻蒸发器22。
在冷冻间室11内的间室湿度达到预设最高湿度时,冷冻间室11内的间室湿度已经相当高了,非常适宜于食材的优质保存,不需要再对冷冻间室11进行加湿操作,此时将制冷剂流路切换至冷冻蒸发器22可以避免冷冻蒸发器22的蒸发器温度持续升高,从而避免了冷冻间室制冷时的制冷量需求大、能耗高等问题。可见,本发明进一步实施例的方案设计更加合理。
具体地,图12是根据本发明又再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12,本发明的控制方法包括:
步骤S10’,当冷藏冷冻装置1处于任一非冷冻间室制冷的状态时,获取冷冻间室11内的间室湿度;
步骤S20’,判断冷冻间室11内的间室湿度是否小于预设最低湿度;若是,则转步骤S30’;若否,则返回重新获取冷冻间室11内的间室湿度;
步骤S30’,将第一切换阀241调节至导通直通管路243的状态;
步骤S40’,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S50”,判断冷冻蒸发器22的蒸发器温度与冷冻间室11内的间室温度之间的温差是否达到预设最小温差(即第一预设最小温差);若是,则转步骤S60”’;若否,则返回步骤S40’重新获取冷冻蒸发器22的蒸发器温度和冷冻间室11内的间室温度;
步骤S60”’,将第一切换阀241恢复至导通处于制冷状态的非冷冻间室对应的非冷冻支路的状态,将第二切换阀245调节至导通旁通管路244的状态,并启动冷冻风机31;
步骤S70’,再次获取冷冻间室11内的间室湿度;以及
步骤S80’,判断再次获取的冷冻间室11内的间室湿度是否达到预设最高湿度;若是,则转步骤S90’;若否,则返回步骤S70’继续获取冷冻间室11内的间室湿度;
步骤S90’,将第二切换阀245恢复至导通冷冻蒸发器22的状态。
在一些实施例中,在启动冷冻风机31之后,本发明的控制方法还包括:
保持冷冻风机31持续运行,直至处于制冷状态的非冷冻间室内的间室温度达到其设定的关机点温度。
也就是说,冷冻风机31启动后可以一直持续运转到正在制冷的非冷冻间室制冷结束。这是因为,当冷冻间室11内的间室湿度未达到预设最高湿度时,冷冻风机31运行可以促使冷冻蒸发器22上的凝霜快速升华,并使得升华形成的水汽聚集在冷冻间室11内以进一步提高冷冻间室11的加湿效率。当冷冻间室11内的间室湿度达到预设最高湿度后,制冷剂恢复流向冷冻蒸发器22,冷冻蒸发器22的蒸发器温度会逐渐降低至稍低于冷冻间室11内的间室温度,此时冷冻风机31持续运行可以将温度约等于或稍低于冷冻间室11内的间室温度的冷却气流输送至冷冻间室11内,有助于将冷冻间室11内的间室温度维持在较佳的范围内。
在一些实施例中,当冷藏冷冻装置1处于任一非冷冻间室制冷的状态时,冷冻风机31的转速小于冷冻风机31在冷藏冷冻装置1处于冷冻间室制冷状态时的设定转速。这样,既可以将冷冻蒸发器22上的部分凝霜升华形成的水汽较快地送入冷冻间室11,又可以避免较多的温度相对较高的气流进入冷冻间室11导致冷冻间室11内温度回升较多。
在一些实施例中,上述预设最小温差(即第一预设最小温差)为范围在1~5℃之间的任一温差值。例如,预设最小温差可以取值1℃、2℃、3℃、4℃或5℃。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1~5℃时切换第一切换阀241和第二切换阀245的状态并启动冷冻风机31,此时,冷冻蒸发器22的蒸发器温度可以维持在比冷冻间室11内的间室温度稍高的状态,通过冷冻风机31吹向冷冻间室11的气流温度比较合适,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,上述预设最低湿度为范围在60%~70%之间的任一相对湿度值。例如,该预设最低湿度阈值可以为60%、61%、62%、63%、64%、65%、66%、67%、68%、69%或70%。若冷冻间室11内的湿度低于此范围,会对食材品质产生影响。若该预设最低湿度的值过小,则在冷冻间室11内的湿度已经很低时,仍然达不到冷冻间室11的加湿启动条件,冷冻间室11内的食材品质会因湿度过低而受到影响,不能够对冷冻间室11进行实质的、长期的保湿加湿操作。若该预设最低湿度过大,很容易达到冷冻间室11的加湿启动条件,导致第一切换阀241切换制冷剂流路的时间过早、过长而影响非冷冻间室的制冷。
在一些实施例中,预设最高湿度为范围在80%~100%之间的任一相对湿度值。例如,该预设最高湿度可以为80%、85%、90%、95%或100%。在此范围内,冷冻间室11内的湿度尚未饱和、接近饱和或刚好饱和,冷冻间室11内的水汽不会或者不易凝结,保湿效果或加湿效果较好,食材的保存效果较好。此时不需要再继续对冷冻间室11内高效地加湿,因此,此时调节将制冷剂流路切换至冷冻蒸发器22,有利于及时地降低冷冻蒸发器22的蒸发器温度,以及时地维持冷冻间室11内的温度,避免冷冻间室11内的温度过度升高而影响食材的保存品质。
本发明还提供一种冷藏冷冻装置,图13是根据本发明另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7和图13,本发明的冷藏冷冻装置1包括箱体10和压缩制冷系统20。
箱体10内限定有冷冻间室11和至少一个非冷冻间室。
压缩制冷系统20包括依次串联成回路的压缩机21、冷凝器29、冷冻节流装置23和 冷冻蒸发器22。冷冻节流装置23的两端并联有一未经过节流的直通管路243和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还包括用于选择性地导通冷冻节流装置23、至少一个非冷冻支路以及直通管路243中的其中一个的第一切换阀241。
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,第一切换阀241与控制装置40电连接,以在控制装置40的控制下运行。
本发明的冷藏冷冻装置1特别地在冷冻节流装置23的两端并联一没有任何节流元件的直通管路243。在非冷冻间室制冷期间,首先获取冷冻间室11内的间室湿度,在冷冻间室11内的间室湿度小于预设最低湿度时将第一切换阀241调节至导通直通管路243的状态,以使得制冷剂不经过任何节流直接流向冷冻蒸发器22,从而快速地提高冷冻蒸发器22的蒸发器温度,使得冷冻蒸发器22的蒸发器温度在短时间内高于冷冻间室11内的间室温度,此时再将第一切换阀241恢复至导通处于制冷状态的非冷冻间室对应的非冷冻支路的状态。一方面,因直通管路243的设置使得冷冻蒸发器22的温度提升速度非常快,也即是非冷冻支路的切断时间较短,减小了对非冷冻间室制冷效率的影响;另一方面,当冷冻蒸发器22的蒸发器温度提高至高于冷冻间室11的间室温度时,通过门封进入冷冻间室11内的外界水汽以及冷冻间室11内的水分(例如食材挥发的水分)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,有效地保持或提高了冷冻间室11内的水分含量从而保持或提高了冷冻间室11内的湿度。
进一步地,冷藏冷冻装置1还包括与控制装置40相连的冷冻风机31,冷冻风机31配置成在非冷冻制冷期间当冷冻蒸发器22的蒸发器温度与冷冻间室11内的间室温度之间的温差达到预设最小温差时受控地启动,以促使气流在冷冻蒸发器22和冷冻间室11之间循环流动,提高了冷冻间室11内的加湿效率。
进一步地,压缩制冷系统20还包括并联在冷冻蒸发器22的两端的旁通管路244,冷藏冷冻装置1还包括与控制装置40相连的第二切换阀245,第二切换阀245配置成在冷冻蒸发器22的蒸发器温度与冷冻间室11内的间室温度之间的温差达到预设最小温差时受控地导通旁通管路244、在冷冻间室11内的间室湿度达到预设最高湿度时受控地恢复导通冷冻蒸发器22。
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 (16)

  1. 一种冷藏冷冻装置的控制方法,所述冷藏冷冻装置包括箱体和压缩制冷系统,所述箱体内限定有冷冻间室和至少一个非冷冻间室,所述压缩制冷系统包括依次串联成回路的压缩机、冷凝器、冷冻节流装置和冷冻蒸发器,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、以及一经过节流或未经过节流的管路,所述压缩制冷系统还包括用于选择性地导通所述冷冻节流装置、所述至少一个非冷冻支路以及所述管路中的一个或多个的第一切换阀;所述控制方法包括:
    当所述冷藏冷冻装置处于任一非冷冻间室制冷的状态时,获取所述冷冻间室内的间室湿度;以及
    当所述冷冻间室内的间室湿度小于预设最低湿度时,将所述第一切换阀调节至至少导通所述管路从而使得相比仅导通所述非冷冻支路时使制冷剂的节流程度更低的状态,以将所述冷冻蒸发器的蒸发器温度提升至高于所述冷冻间室内的间室温度。
  2. 根据权利要求1所述的控制方法,其中,所述管路为具有一个附加节流阀的节流支路;且
    当所述冷冻间室内的间室湿度小于预设最低湿度时,将所述第一切换阀调节至至少导通所述管路从而使得相比仅导通所述非冷冻支路时使制冷剂的节流程度更低的状态的步骤包括:
    当所述冷冻间室内的间室湿度小于预设最低湿度时,将所述第一切换阀调节至同时导通所述节流支路和处于制冷状态的非冷冻间室对应的非冷冻支路的状态。
  3. 根据权利要求2所述的控制方法,其中,在将所述第一切换阀调节至同时导通所述节流支路和处于制冷状态的非冷冻间室对应的非冷冻支路的状态之后,所述控制方法还包括:
    获取所述冷冻蒸发器的蒸发器温度与所述冷冻间室内的间室温度;以及
    当所述冷冻蒸发器的蒸发器温度与所述冷冻间室内的间室温度之间的温差尚未达到第一预设最小温差时增大所述附加节流阀的开度,以使得所述冷冻蒸发器的蒸发器温度与所述冷冻间室内的间室温度之间的温差达到所述第一预设最小温差;其中
    所述第一预设最小温差大于零。
  4. 根据权利要求3所述的控制方法,其中,所述冷藏冷冻装置还包括用于向所述冷冻间室驱动送风的冷冻风机;且所述控制方法还包括:
    当所述冷冻蒸发器的蒸发器温度与所述冷冻间室内的间室温度之间的温差达到所述第一预设最小温差时,启动所述冷冻风机,以促使气流在所述冷冻蒸发器和所述冷冻间室之间循环流动。
  5. 根据权利要求4所述的控制方法,其中,在启动所述冷冻风机之后,所述控制方法还包括:
    再次获取所述冷冻间室内的间室湿度;以及
    若再次获取的所述冷冻间室内的间室湿度达到预设最高湿度,则逐次地减小所述附加节流阀的开度,直至所述冷冻间室内的间室温度与所述冷冻蒸发器的蒸发器温度之间的温差达到第二预设最小温差时保持所述附加节流阀的开度不变,其中所述第二预设最小温差大于零。
  6. 根据权利要求1所述的控制方法,其中,所述管路为未经过节流的直通管路;且
    当所述冷冻间室内的间室湿度小于预设最低湿度时,将所述第一切换阀调节至至少导通所述管路从而使得相比仅导通所述非冷冻支路时使制冷剂的节流程度更低的状态的步骤包括:
    当所述冷冻间室内的间室湿度小于预设最低湿度时,将所述第一切换阀调节至导通 所述直通管路的状态,直至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后再将所述第一切换阀恢复至导通处于制冷状态的所述非冷冻间室对应的非冷冻支路的状态。
  7. 根据权利要求6所述的控制方法,其中,所述冷冻蒸发器的两端并联有一旁通管路,所述压缩制冷系统还包括用于选择性地导通所述冷冻蒸发器和所述旁通管路中的其中之一的第二切换阀;且
    在将所述第一切换阀调节至导通所述直通管路的状态后,所述控制方法还包括:
    当所述冷冻蒸发器的蒸发器温度与所述冷冻间室内的间室温度之间的温差达到第一预设最小温差时,将所述第一切换阀恢复至导通处于制冷状态的所述非冷冻间室对应的非冷冻支路的状态,并将所述第二切换阀调节至导通所述旁通管路的状态;其中
    所述第一预设最小温差大于零。
  8. 根据权利要求7所述的控制方法,其中,所述冷藏冷冻装置还包括用于向所述冷冻间室驱动送风的冷冻风机;且
    当所述冷冻蒸发器的蒸发器温度与所述冷冻间室内的间室温度之间的温差达到所述第一预设最小温差时,所述控制方法还包括:
    启动所述冷冻风机,以促使气流在所述冷冻蒸发器和所述冷冻间室之间循环流动。
  9. 根据权利要求8所述的控制方法,其中,在启动所述冷冻风机之后,所述控制方法还包括:
    再次获取所述冷冻间室内的间室湿度;以及
    若再次获取的所述冷冻间室内的间室湿度达到预设最高湿度,则将所述第二切换阀恢复至导通所述冷冻蒸发器的状态。
  10. 根据权利要求8所述的控制方法,其中,在启动所述冷冻风机之后,所述控制方法还包括:
    保持所述冷冻风机持续运行,直至处于制冷状态的所述非冷冻间室内的间室温度达到其设定的关机点温度。
  11. 根据权利要求3或7所述的控制方法,其中
    所述第一预设最小温差为范围在1~5℃之间的任一温差值。
  12. 根据权利要求5所述的控制方法,其中
    所述第二预设最小温差为范围在1~3℃之间的任一温差值。
  13. 根据权利要求5或9所述的控制方法,其中
    所述预设最低湿度为范围在60%~70%之间的任一相对湿度值;且/或
    所述预设最高湿度为范围在80%~100%之间的任一相对湿度值。
  14. 根据权利要求4或8所述的控制方法,其中
    当所述冷藏冷冻装置处于任一非冷冻间室制冷的状态时,所述冷冻风机的转速小于所述冷冻风机在所述冷藏冷冻装置处于冷冻间室制冷状态时的设定转速。
  15. 根据权利要求1-10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节流装置和冷藏蒸发器;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节流装置和变温蒸发器。
  16. 一种冷藏冷冻装置,包括:
    箱体,其内限定有冷冻间室和至少一个非冷冻间室;
    压缩制冷系统,包括依次串联成回路的压缩机、冷凝器、冷冻节流装置和冷冻蒸发器,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、以及一经过节流或未经过节流的管路,所述压缩制冷系统还包括用于选择性地导通所述冷冻节流装置、所述至少一个非冷冻支路以及所述管路中的一个或 多个的第一切换阀;以及
    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1-15中任一所述的控制方法。
PCT/CN2023/070734 2022-01-25 2023-01-05 冷藏冷冻装置及其控制方法 WO2023142952A1 (zh)

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