CN116481230A - Refrigerating and freezing device and control method thereof - Google Patents
Refrigerating and freezing device and control method thereof Download PDFInfo
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- CN116481230A CN116481230A CN202210037963.3A CN202210037963A CN116481230A CN 116481230 A CN116481230 A CN 116481230A CN 202210037963 A CN202210037963 A CN 202210037963A CN 116481230 A CN116481230 A CN 116481230A
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- freezing
- refrigerating
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- evaporator
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- 238000007710 freezing Methods 0.000 title claims abstract description 255
- 230000008014 freezing Effects 0.000 title claims abstract description 255
- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000005057 refrigeration Methods 0.000 claims abstract description 76
- 230000006835 compression Effects 0.000 claims abstract description 17
- 238000007906 compression Methods 0.000 claims abstract description 17
- 239000003507 refrigerant Substances 0.000 claims abstract description 14
- 230000015654 memory Effects 0.000 claims description 9
- 238000001816 cooling Methods 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 230000008859 change Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000007664 blowing Methods 0.000 description 3
- 238000004321 preservation Methods 0.000 description 3
- 230000009246 food effect Effects 0.000 description 2
- 238000009920 food preservation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 235000016709 nutrition Nutrition 0.000 description 1
- 230000035764 nutrition Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000008022 sublimation Effects 0.000 description 1
- 238000000859 sublimation Methods 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
- F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
- F25D17/042—Air treating means within refrigerated spaces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
- F25D17/06—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
- F25D2317/04—Treating air flowing to refrigeration compartments
- F25D2317/041—Treating air flowing to refrigeration compartments by purification
- F25D2317/0413—Treating air flowing to refrigeration compartments by purification by humidification
- F25D2317/04131—Control means therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
- F25D2317/06—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation
- F25D2317/068—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation characterised by the fans
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2600/00—Control issues
- F25D2600/06—Controlling according to a predetermined profile
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The invention relates to a refrigeration and freezing device and a control method thereof, wherein the refrigeration and freezing device comprises a box body which is limited with a freezing compartment, a freezing fan and a compression refrigeration system, and the compression refrigeration system comprises a compressor, a freezing evaporator connected with the compressor in series and a freezing throttling device. The control method of the invention comprises the following steps: when the refrigerating and freezing device reaches a preset automatic shutdown condition, controlling the refrigerating fan to be in a stop state, and controlling the refrigerant to flow through the refrigerating throttling device and the refrigerating evaporator; adjusting the operating frequency of the compressor until the temperature difference value between the evaporator temperature of the freezing evaporator and the room temperature in the freezing room is greater than or equal to a preset minimum temperature difference; stopping the operation of the compressor and starting the refrigerating fan; and stopping the refrigerating fan after the refrigerating fan continuously operates for a first preset period of time. The invention improves the humidity in the freezing chamber before stopping the machine, and then stops the machine, thereby improving the average humidity in the freezing chamber, and the temperature in the freezing chamber can not obviously rise.
Description
Technical Field
The present invention relates to a refrigeration technology, and more particularly, to a refrigeration and freezing apparatus and a control method thereof.
Background
The humidity in the refrigerating and freezing device can influence the evaporation speed of the water in the food materials, thereby influencing the quality of the food materials. When the humidity is too low, the water of the food material evaporates faster, which causes weight loss of the food material, and then causes the problems of poor food storage effect, shorter food preservation period and the like. Therefore, it is always a critical research topic to keep the refrigerating and freezing apparatus wet. However, most of the conventional refrigerating and freezing apparatuses humidify and moisturize the refrigerating chamber, and there is little concern about humidification and moisturization of the freezing chamber. In fact, the air-cooled refrigeration and freezing device generally has the problem that the humidity fluctuation is large during the freezing and refrigerating period, the humidity fluctuation and the humidity are low, and food stored in the freezing chamber can lose water, so that the taste of the food is affected, nutrition loss is caused, and the user experience is affected.
Disclosure of Invention
An object of a first aspect of the present invention is to overcome at least one of the drawbacks of the prior art by providing a control method of a refrigeration and freezer capable of increasing the average humidity in the freezer compartment.
A further object of the first aspect of the invention is to avoid having a large influence on the temperature of the freezer compartment.
An object of the second aspect of the present invention is to provide a refrigerating and freezing apparatus capable of increasing the average humidity in a freezing compartment.
According to a first aspect of the present invention, there is provided a method of controlling a refrigeration chiller comprising a cabinet defining a freezer compartment, a refrigeration fan for driving an air supply into the freezer compartment, and a compression refrigeration system comprising a compressor, a refrigeration evaporator connected in series with the compressor, and a refrigeration throttle; the control method comprises the following steps:
when the refrigerating and freezing device reaches a preset automatic shutdown condition, controlling the refrigerating fan to be in a stop state, and controlling the refrigerant to flow through the refrigerating throttling device and the refrigerating evaporator;
adjusting the operating frequency of the compressor until the temperature difference value between the evaporator temperature of the freezing evaporator and the room temperature in the freezing room is greater than or equal to a preset minimum temperature difference, wherein the preset minimum temperature difference is greater than zero;
stopping the operation of the compressor and starting the refrigerating fan;
and stopping the refrigerating fan after the refrigerating fan continuously operates for a first preset time.
Optionally, at least one non-freezing compartment is further defined in the box, two ends of the freezing throttling device are connected in parallel with at least one non-freezing branch for providing cold energy for the at least one non-freezing compartment respectively, and the compression refrigeration system further comprises a switching valve for conducting one of the freezing throttling device and the at least one non-freezing branch;
before the automatic shutdown condition is reached, the refrigerating and freezing device is in a refrigerating chamber refrigerating state, and the refrigerating fan is in an operating state in the refrigerating chamber refrigerating state; and is also provided with
The step of controlling the flow of refrigerant through the refrigeration throttle and the refrigeration evaporator comprises:
the state of the switching valve is kept unchanged.
Optionally, at least one non-freezing compartment is further defined in the box, two ends of the freezing throttling device are connected in parallel with at least one non-freezing branch for providing cold energy for the at least one non-freezing compartment respectively, and the compression refrigeration system further comprises a switching valve for conducting one of the freezing throttling device and the at least one non-freezing branch;
before the automatic shutdown condition is reached, the refrigeration and freezing device is in a non-refrigeration compartment refrigeration state, and the refrigerating fan is in a stop state in the non-refrigeration compartment refrigeration state; and is also provided with
The step of controlling the flow of refrigerant through the refrigeration throttle and the refrigeration evaporator comprises:
and switching the switching valve to a state of conducting the refrigeration throttling device.
Optionally, the step of adjusting the operating frequency of the compressor until a temperature difference value between the evaporator temperature of the freezing evaporator and the inter-chamber temperature in the freezing compartment is greater than or equal to a preset minimum temperature difference comprises:
controlling the compressor to operate at a frequency lower than a first set frequency thereof in a refrigerating state of the refrigerating compartment;
acquiring the evaporator temperature of the freezing evaporator and the compartment temperature in the freezing compartment;
calculating a temperature difference value between the evaporator temperature and the inter-chamber temperature;
and if the temperature difference value between the evaporator temperature and the inter-chamber temperature is smaller than the preset minimum temperature difference, reducing the operation frequency of the compressor, and returning to continuously obtain the evaporator temperature of the freezing evaporator and the inter-chamber temperature in the freezing chamber until the temperature difference value between the evaporator temperature and the inter-chamber temperature is larger than or equal to the preset minimum temperature difference.
Optionally, the amplitude of each decrease in the operating frequency of the compressor is the same.
Optionally, the operating frequency of the compressor is reduced at a time with an amplitude of 2 to 20 hz.
Optionally, the preset minimum temperature difference is any temperature difference in the range of 2-4 ℃.
Optionally, the first preset duration is any duration value ranging from 3 to 10min.
Optionally, the automatic shutdown condition is that the temperature of each storage compartment of the refrigeration and freezing device reaches the respective set temperature.
According to a second aspect of the present invention there is also provided a refrigeration and freezing apparatus comprising a cabinet defining a freezer compartment, a refrigeration fan for driving an air supply into the freezer compartment, and a compression refrigeration system having a compressor, the refrigeration and freezing apparatus further comprising:
the control device comprises a processor and a memory, wherein a machine executable program is stored in the memory, and the machine executable program is used for realizing the control method according to any scheme when being executed by the processor.
The control method of the invention does not stop the compressor immediately when the refrigerating and freezing device reaches the preset automatic shutdown condition, but stops the freezing fan firstly, and the operating frequency of the compressor is adjusted to ensure that the evaporator temperature of the freezing evaporator is higher than the room temperature in the freezing room, then stops the compressor and starts the freezing fan, and the air flow is promoted to circulate between the freezing evaporator and the freezing room through the freezing fan. Because the evaporator temperature of the freezing evaporator is higher than the room temperature in the freezing room, the outside water vapor entering the freezing room through the door seal, the water in the freezing room (such as the water volatilized by food materials) and the water formed by the sublimating of the frost on the freezing evaporator can be condensed in the freezing room with lower temperature instead of the freezing evaporator, thereby effectively improving the water content in the freezing room and the humidity in the freezing room. The invention increases the humidity in the freezing chamber before the refrigerating and freezing device stops. After the machine is stopped, the humidity in the freezing chamber is not reduced and even slowly rises, so that the average humidity in the freezing chamber can be improved, and the problem that the food preservation effect is affected due to lower humidity in the freezing chamber is avoided.
Further, the temperature difference value between the evaporator temperature and the room temperature in the freezing room is monitored by acquiring the evaporator temperature of the freezing evaporator and the room temperature in the freezing room, and the running frequency of the compressor is gradually and slowly reduced, so that the evaporator temperature of the freezing evaporator is higher than the room temperature in the freezing room, the humidity in the freezing room can be simply and effectively improved, and the influence on the temperature of the freezing room caused by the fact that the temperature rise of the freezing evaporator is too high due to the fact that the running frequency of the compressor is reduced too much at one time can be avoided.
The above, as well as additional objectives, advantages, and features of the present invention will become apparent to those skilled in the art from the following detailed description of a specific embodiment of the present invention when read in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter by way of example and not by way of limitation with reference to the accompanying drawings. The same reference numbers will be used throughout the drawings to refer to the same or like parts or portions. It will be appreciated by those skilled in the art that the drawings are not necessarily drawn to scale. In the accompanying drawings:
FIG. 1 is a schematic block diagram of a refrigeration and freezer according to one embodiment of the invention;
FIG. 2 is a schematic block diagram of a compression refrigeration system of a refrigeration chiller according to one embodiment of the present invention;
FIG. 3 is a schematic flow chart of a method of controlling a refrigeration and freezer according to one specific embodiment of the invention;
FIG. 4 is a schematic flow chart of a method of controlling a refrigeration and freezer according to another embodiment of the invention;
fig. 5 is a schematic block diagram of a refrigerating and freezing apparatus according to an embodiment of the present invention.
Detailed Description
The present invention first provides a control method of a refrigerating and freezing apparatus, fig. 1 is a schematic structural diagram of the refrigerating and freezing apparatus according to an embodiment of the present invention, and fig. 2 is a schematic structural block diagram of a compression refrigerating system of the refrigerating and freezing apparatus according to an embodiment of the present invention.
Referring to fig. 1 and 2, the refrigerating and freezing apparatus 1 of the present invention includes a cabinet 10 defining a freezing compartment 11, a freezing blower 31 for driving air supply into the freezing compartment 11, and a compression refrigeration system 20, and the compression refrigeration system 20 includes a compressor 21, a condenser 29 connected in series with the compressor 21, a freezing evaporator 22, and a freezing throttle 23. The freezing evaporator 22 and the freezing throttle 23 form a freezing branch. Specifically, the freeze-throttle 23 may be a capillary tube, a throttle valve, or the like.
The inventors have recognized that during refrigeration of the refrigerated compartment 11, the evaporator temperature of the refrigerated evaporator 22 must be lower than the compartment temperature of the refrigerated compartment 11 to have the ability to cool the refrigerated compartment 11. Whereas water vapor typically collects and condenses at lower temperatures. Therefore, during the cooling of the freezing compartment 11, the moisture in the freezing compartment 11 is condensed at the freezing evaporator 22, and the humidity in the freezing compartment 11 is inevitably lowered. When the temperature in the freezer compartment 11 reaches the set temperature and stops, the temperature in the freezer compartment 11 almost reaches a minimum, which will lower the average humidity of the freezer compartment 11. Although the humidity in the freezing compartment 11 increases slowly after the machine is stopped, the rate of humidity increase is slow, and the food material in the freezing compartment 11 is still in a low humidity environment for a long time, and the preservation quality is poor.
The applicant further thought that if the compartment temperature in the freezer compartment 11 is lower than the evaporator temperature at the freezer evaporator 22, moisture would collect in the freezer compartment, and this principle could be used to effectively increase the humidity in the freezer compartment 11.
Based on the above knowledge, the present invention provides a control method of a refrigerating and freezing apparatus, comprising:
when the refrigerating and freezing device 1 reaches a preset automatic shutdown condition, the refrigerating fan 31 is controlled to be in a stopped state, and the refrigerant is controlled to flow through the refrigerating throttling device 23 and the refrigerating evaporator 22;
adjusting the operating frequency of the compressor 21 until the temperature difference value between the evaporator temperature of the freezing evaporator 22 and the inter-chamber temperature in the freezing inter-chamber 11 is greater than or equal to a preset minimum temperature difference, which is greater than zero;
the operation of the compressor 21 is stopped and the freezing blower 31 is started;
the freezing blower 31 is stopped after the freezing blower 31 is continuously operated for a first preset period of time.
The control method of the present invention does not stop the compressor 21 immediately when the refrigerating and freezing apparatus 1 reaches a preset auto-shut-down condition, but stops the freezing fan 31 to stop blowing air flow into the freezing compartment 11, and makes the evaporator temperature of the freezing evaporator 22 higher than the compartment temperature in the freezing compartment 11 by adjusting the operation frequency of the compressor 21, and then stops the compressor 21, starts the freezing fan 31, and causes the air flow to circulate between the freezing evaporator 22 and the freezing compartment 11 through the freezing fan 31. Since the evaporator temperature of the freezing evaporator 22 is higher than the room temperature in the freezing room 11, the outside moisture entering the freezing room 11 through the door seal, the moisture in the freezing room 11 (such as the moisture volatilized from the food material), and the moisture formed by the sublimation of the frost on the freezing evaporator 22 are condensed in the freezing room 11 with a lower temperature instead of at the freezing evaporator 22, thereby effectively increasing the moisture content in the freezing room 11 and the humidity in the freezing room 11.
The present invention increases the humidity in the refrigerating compartment 11 before the refrigerating and freezing apparatus 1 is stopped. After the machine is stopped, the humidity in the freezing chamber 11 is not reduced and even rises slowly, so that the average humidity in the freezing chamber 11 can be improved, and the influence on the preservation effect of food due to lower humidity in the freezing chamber 11 is avoided.
Meanwhile, as long as the evaporator temperature of the freezing evaporator 22 is higher than the room temperature in the freezing room 11 by a certain value, the freezing blower 31 can humidify the freezing room 11 when operated. Therefore, the present invention can effectively increase the humidity in the freezing compartment 11 without significantly increasing the temperature of the freezing compartment 11 by blowing the air flow having a slightly higher temperature, which is formed after passing through the freezing evaporator 22, into the freezing compartment 11 for a long time, while limiting the operation time of the freezing blower 31.
The control method of the invention regulates the humidity in the freezing compartment 11 before stopping, does not need to start the compressor 21 again for humidification operation after stopping, and avoids damage to the compressor 21 caused by frequent start and stop.
In addition, the invention realizes the purpose of improving the humidity in the freezing chamber 11 by controlling the start and stop of the refrigerating fan 31 and the stop time and the running frequency of the compressor 21 on the basis of the original structure of the refrigerating and freezing device 1 without adding any auxiliary structure, thereby having no influence on the original structure and the storage capacity of the refrigerating and freezing device 1 and improving the feasibility of practical application.
Fig. 3 is a schematic flowchart of a control method of a refrigerating and freezing apparatus according to an embodiment of the present invention, referring to fig. 3, the control method of the present invention includes:
step S10, judging whether the refrigerating and freezing device 1 reaches a preset automatic shutdown condition; if yes, go to step S20, if not, return to and continue to judge;
step S20, controlling the refrigerating fan 31 to be in a stop state;
step S30 of controlling the refrigerant to flow through the refrigeration throttle 23 and the refrigeration evaporator 22;
step S40, adjusting the operation frequency of the compressor 21 until the temperature difference value between the evaporator temperature of the freezing evaporator 22 and the room temperature in the freezing room 11 is greater than or equal to a preset minimum temperature difference, which is greater than zero;
step S50, stopping the operation of the compressor 21 and starting the freezing blower 31;
step S60, judging whether the continuous running time of the refrigerating fan 31 reaches a first preset duration; if yes, go to step S70, if not, return to and continue to judge;
step S70, stopping the freezing blower 31.
In some embodiments, at least one non-freezing compartment is further defined in the case 10, and at least one non-freezing branch for providing cold to the at least one non-freezing compartment is connected in parallel to both ends of the freezing and throttling device 23, and the compression refrigeration system 20 further includes a switching valve 24 for conducting one of the freezing and throttling device 23 and the at least one non-freezing branch.
For example, the at least one non-refrigerated compartment may comprise a refrigerated compartment 12, the at least one non-refrigerated leg may comprise a refrigerated leg for providing refrigeration to the refrigerated compartment 12, the refrigerated leg comprising a refrigerated evaporator 25 and a refrigerated throttle 26 connected in series, the refrigerated throttle 26 may be a capillary tube or a throttle valve or the like. The at least one non-freezing compartment may further comprise a temperature change compartment 13, the at least one non-freezing leg may further comprise a temperature change leg for providing cooling to the temperature change compartment 13, the temperature change leg comprising a temperature change evaporator 27 and a temperature change throttling means 28 connected in series, the temperature change throttling means 28 may be a capillary tube or a throttle valve or the like.
When the refrigerating compartment 11, the refrigerating compartment 12, and the temperature changing compartment 13 are defined in the cabinet 10 at the same time, the refrigerating and freezing apparatus 1 generally operates in the order of refrigerating compartment cooling, temperature changing compartment cooling, and refrigerating compartment cooling. Namely, when the refrigeration of the refrigerating compartment begins, the refrigeration of the refrigerating compartment and the refrigeration of the temperature-changing compartment are usually carried out; that is, the refrigerating and freezing apparatus 1 is generally in a refrigerating compartment refrigerating state before the auto-off condition is reached. It will be appreciated that in the refrigerating state of the refrigerating compartment 11, the refrigerating fan 31 is in an operating state, and the switching valve 24 is in a state of turning on the refrigerating throttle device 23, so that the refrigerant flows through the refrigerating throttle device 23 and the refrigerating evaporator 22, thereby achieving the purpose of refrigerating the refrigerating compartment 11.
In these embodiments, the step S30 of controlling the flow of the refrigerant through the refrigeration throttle 23 and the refrigeration evaporator 22 may specifically include:
the state of the switching valve 24 is kept unchanged.
That is, the refrigerating and freezing apparatus 1 is in the refrigerating compartment cooling state before the automatic shutdown condition is reached, and the switching valve 24 is already in the state of turning on the refrigerating throttle 23, and therefore, the state of the switching valve 24 does not need to be changed after the automatic shutdown condition is reached.
In other embodiments, the refrigeration and freezer 1 may be in a non-refrigerated compartment cooling state, such as a refrigerated or variable temperature cooling state, prior to reaching the auto-off condition. In the non-freezing compartment cooling state, the freezing blower 31 is stopped, no air is supplied to the freezing compartment 11, the switching valve 24 is in a state of conducting the corresponding non-freezing branch, and no refrigerant flows through the freezing throttle 23.
In these embodiments, the step S30 of controlling the flow of the refrigerant through the refrigeration throttle 23 and the refrigeration evaporator 22 may specifically include:
the switching valve 24 is switched to a state in which the refrigeration throttle 23 is turned on.
That is, when the refrigerating and freezing apparatus 1 is in the non-freezing compartment cooling state before the auto-shut-down condition is reached, after the auto-shut-down condition is reached, the state of the switching valve 24 needs to be adjusted so as to be in a state of turning on the freezing and throttling device 23 in order to adjust the evaporator temperature of the freezing evaporator 22.
In some embodiments, the step S40 of adjusting the operating frequency of the compressor 21 until the temperature difference value between the evaporator temperature of the freezing evaporator 22 and the compartment temperature inside the freezing compartment 11 is greater than or equal to the preset minimum temperature difference may specifically include:
controlling the compressor 21 to operate at a frequency lower than a first set frequency thereof in a refrigerating state of the refrigerating compartment;
acquiring the evaporator temperature of the freezing evaporator 22 and the compartment temperature in the freezing compartment 11;
calculating a temperature difference value between the evaporator temperature and the intermediate temperature;
if the temperature difference between the evaporator temperature and the compartment temperature is less than the preset minimum temperature difference, the operating frequency of the compressor 21 is reduced and the refrigeration evaporator 22 and the compartment temperature in the refrigeration compartment 11 are returned to be continuously obtained until the temperature difference between the evaporator temperature and the compartment temperature is greater than or equal to the preset minimum temperature difference.
That is, the present invention monitors the temperature difference between the evaporator temperature and the compartment temperature by acquiring the evaporator temperature of the freezing evaporator 22 and the compartment temperature in the freezing compartment 11, and gradually and slowly reduces the operation frequency of the compressor 21, so that the evaporator temperature of the freezing evaporator 22 is greater than the compartment temperature in the freezing compartment 11, which can simply and effectively increase the humidity in the freezing compartment 11, and can prevent the temperature rise of the freezing evaporator 22 from greatly influencing the temperature of the freezing compartment 11 due to the excessive decrease of the operation frequency of the compressor 21 at one time.
Specifically, fig. 4 is a schematic flowchart of a control method of a refrigerating and freezing apparatus according to another embodiment of the present invention, and referring to fig. 4, the control method of the present invention includes:
step S10, judging whether the refrigerating and freezing device 1 reaches a preset automatic shutdown condition; if yes, go to step S20, if not, return to and continue to judge;
step S20, controlling the refrigerating fan 31 to be in a stop state;
step S30 of controlling the refrigerant to flow through the refrigeration throttle 23 and the refrigeration evaporator 22;
step S41 of controlling the compressor 21 to operate at a frequency lower than the first set frequency thereof in the refrigerating state of the refrigerating compartment;
step S42, acquiring the evaporator temperature of the freezing evaporator 22 and the compartment temperature in the freezing compartment 11;
step S43, calculating a temperature difference value between the evaporator temperature and the intermediate temperature;
step S44, judging whether the temperature difference value between the evaporator temperature and the intermediate temperature is smaller than a preset minimum temperature difference; if yes, go to step S45, if no, go to step S50;
step S45, the operation frequency of the compressor 21 is reduced, and the process returns to step S42;
step S50, stopping the operation of the compressor 21 and starting the freezing blower 31;
step S60, judging whether the continuous running time of the refrigerating fan 31 reaches a first preset duration; if yes, go to step S70, if not, return to and continue to judge;
step S70, stopping the freezing blower 31.
In some embodiments, the amplitude of each decrease in the operating frequency of the compressor 21 is the same. That is, the operation frequency of the compressor 21 is reduced uniformly, and the control is easy.
Specifically, the operating frequency of the compressor 21 may be reduced by a range of 2 to 20 hz at a time to find an operating frequency of the compressor 21 that can increase the humidity in the freezing compartment 11 as much as possible and has the least influence on the temperature in the freezing compartment 11. For example, the operating frequency of the compressor 21 is reduced by 2 hz, 4 hz, 6 hz, 8 hz, 10 hz, 12 hz, 14 hz, 16 hz, 18 hz, 20 hz, etc. each time.
In some embodiments, the predetermined minimum temperature difference may be any temperature difference ranging from 2 to 4 ℃. For example, the preset minimum temperature difference may take the value of 2 ℃, 2.5 ℃, 3 ℃, 3.5 ℃ or 4 ℃. That is, when the evaporator temperature of the freezing evaporator 22 is 2 to 4 ℃ higher than the room temperature in the freezing room 11, not only a good humidification effect can be obtained in the freezing room 11, but also a large influence on the temperature in the freezing room 11 is not exerted.
In some embodiments, the first preset duration may be any duration value ranging from 3 to 10 minutes. For example, the first preset time period may be 3min, 4min, 5min, 6min, 7min, 8min, 9min, or 10min. The first preset time period is too small, namely the running time of the refrigerating fan 31 is too short, and the humidifying effect in the refrigerating compartment 11 is not obvious; an excessive value of the first preset time period, i.e., an excessive operation time of the freezing blower 31, may cause the temperature in the freezing compartment 11 to rise significantly. Therefore, the first preset time length is set to any time length value ranging from 3 minutes to 10 minutes, so that the freezing compartment 11 can be effectively humidified, and the temperature in the freezing compartment 11 can be prevented from generating larger fluctuation.
In some embodiments, the automatic shutdown condition is that the temperature of each storage compartment of the refrigeration and freezing apparatus 1 reaches its respective set temperature.
Specifically, if the refrigerating and freezing apparatus 1 includes only the freezing compartment 11, the automatic shutdown condition is that the freezing compartment 11 reaches the freezing set temperature.
Specifically, if the refrigerating and freezing apparatus 1 includes at least one non-freezing compartment other than the freezing compartment 11, for example, a refrigerating compartment 12 and a temperature changing compartment 13, the automatic shutdown condition is that the refrigerating compartment 12 reaches a refrigerating set temperature, the temperature changing compartment 13 reaches a temperature changing set temperature, and the freezing compartment 11 reaches a freezing set temperature.
The present invention also provides a refrigerating and freezing apparatus, and fig. 5 is a schematic block diagram of the refrigerating and freezing apparatus according to an embodiment of the present invention. Referring to fig. 1, 2 and 5, the refrigerating and freezing apparatus 1 of the present invention includes a cabinet 10 defining a freezing compartment 11, a freezing fan 31 for driving air supply into the freezing compartment 11, and a compression refrigeration system 20 having a compressor 21.
In particular, the refrigerating and freezing apparatus 1 further comprises a control device 40, the control device 40 comprises 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.
Specifically, the compressor 21 and the freezing blower 31 are both connected to the control device 40 to operate under the control of the control device 40.
Specifically, the processor 41 may be a central processing unit (central processing unit, simply referred to as CPU), or a digital processing unit, or the like. The processor 41 transmits and receives data through a communication interface. The memory 44 is used to store programs executed by the processor 41. Memory 44 is any medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, and may be a combination of memories. The above-described machine-executable program 43 may be downloaded from a computer-readable storage medium to a corresponding computing/processing device or downloaded to a computer or an external memory device via a network (e.g., the internet, a local area network, a wide area network, and/or a wireless network).
The present invention increases the humidity in the refrigerating compartment 11 before the refrigerating and freezing apparatus 1 is stopped. After the machine is stopped, the humidity in the freezing chamber 11 is not reduced and even rises slowly, so that the average humidity in the freezing chamber 11 can be improved, and the influence on the preservation effect of food due to lower humidity in the freezing chamber 11 is avoided.
In the refrigeration and freezing apparatus 1 of the present invention, the operation time of the freezing fan 31 is limited to a certain extent, so that the humidity in the freezing compartment 11 can be effectively increased, and the temperature of the freezing compartment 11 is not remarkably increased by blowing the air flow having a slightly high temperature, which is formed by passing through the freezing evaporator 22, to the freezing compartment 11 for a long period of time.
Meanwhile, the control method of the invention regulates the humidity in the freezing compartment 11 before stopping, does not need to start the compressor 21 again for humidification operation after stopping, and avoids damage to the compressor 21 caused by frequent start and stop.
It will be appreciated by those skilled in the art that the refrigeration and freezer 1 of the present invention is not limited to the three door refrigerator shown in fig. 1 and may be a single door refrigerator, a double door refrigerator, or other refrigerators having a freezer compartment.
It will also be appreciated by those skilled in the art that the refrigeration and freezer 1 of the present invention includes not only a refrigerator but also a freezer, a refrigerator or other refrigeration and freezer having at least a freezing function.
By now it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been shown and described herein in detail, many other variations or modifications of the invention consistent with the principles of the invention may be directly ascertained or inferred from the present disclosure without departing from the spirit and scope of the invention. Accordingly, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.
Claims (10)
1. A control method of a refrigerating and freezing device, the refrigerating and freezing device comprising a box body defining a freezing compartment, a freezing fan for driving air supply into the freezing compartment, and a compression refrigerating system, the compression refrigerating system comprising a compressor, a freezing evaporator and a freezing throttling device connected in series with the compressor; the control method comprises the following steps:
when the refrigerating and freezing device reaches a preset automatic shutdown condition, controlling the refrigerating fan to be in a stop state, and controlling the refrigerant to flow through the refrigerating throttling device and the refrigerating evaporator;
adjusting the operating frequency of the compressor until the temperature difference value between the evaporator temperature of the freezing evaporator and the room temperature in the freezing room is greater than or equal to a preset minimum temperature difference, wherein the preset minimum temperature difference is greater than zero;
stopping the operation of the compressor and starting the refrigerating fan;
and stopping the refrigerating fan after the refrigerating fan continuously operates for a first preset time.
2. The control method according to claim 1, wherein at least one non-freezing compartment is further defined in the case, at least one non-freezing branch for providing cold to the at least one non-freezing compartment is connected in parallel to both ends of the freezing and throttling device, and the compression and refrigerating system further comprises a switching valve for switching on one of the freezing and throttling device and the at least one non-freezing branch;
before the automatic shutdown condition is reached, the refrigerating and freezing device is in a refrigerating chamber refrigerating state, and the refrigerating fan is in an operating state in the refrigerating chamber refrigerating state; and is also provided with
The step of controlling the flow of refrigerant through the refrigeration throttle and the refrigeration evaporator comprises:
the state of the switching valve is kept unchanged.
3. The control method according to claim 1, wherein at least one non-freezing compartment is further defined in the case, at least one non-freezing branch for providing cold to the at least one non-freezing compartment is connected in parallel to both ends of the freezing and throttling device, and the compression and refrigerating system further comprises a switching valve for switching on one of the freezing and throttling device and the at least one non-freezing branch;
before the automatic shutdown condition is reached, the refrigeration and freezing device is in a non-refrigeration compartment refrigeration state, and the refrigerating fan is in a stop state in the non-refrigeration compartment refrigeration state; and is also provided with
The step of controlling the flow of refrigerant through the refrigeration throttle and the refrigeration evaporator comprises:
and switching the switching valve to a state of conducting the refrigeration throttling device.
4. The control method of claim 1, wherein the step of adjusting the operating frequency of the compressor until a temperature difference value between an evaporator temperature of the freezing evaporator and a compartment temperature in the freezing compartment is greater than or equal to a preset minimum temperature difference comprises:
controlling the compressor to operate at a frequency lower than a first set frequency thereof in a refrigerating state of the refrigerating compartment;
acquiring the evaporator temperature of the freezing evaporator and the compartment temperature in the freezing compartment;
calculating a temperature difference value between the evaporator temperature and the inter-chamber temperature;
and if the temperature difference value between the evaporator temperature and the inter-chamber temperature is smaller than the preset minimum temperature difference, reducing the operation frequency of the compressor, and returning to continuously obtain the evaporator temperature of the freezing evaporator and the inter-chamber temperature in the freezing chamber until the temperature difference value between the evaporator temperature and the inter-chamber temperature is larger than or equal to the preset minimum temperature difference.
5. The control method according to claim 4, wherein,
the amplitude of each decrease in the operating frequency of the compressor is the same.
6. The control method according to claim 5, wherein,
the operating frequency of the compressor is reduced at a time with an amplitude of 2 to 20 hz.
7. The control method according to claim 1, wherein,
the preset minimum temperature difference is any temperature difference value ranging from 2 ℃ to 4 ℃.
8. The control method according to claim 1, wherein,
the first preset duration is any duration value ranging from 3min to 10min.
9. The control method according to claim 1, wherein,
the automatic shutdown condition is that the temperature of each storage compartment of the refrigeration and freezing device reaches the respective set temperature.
10. A refrigeration and chiller apparatus including a cabinet defining a freezer compartment, a refrigeration fan for driving an air supply into the freezer compartment, and a compression refrigeration system having a compressor, the refrigeration and chiller apparatus further comprising:
control device comprising a processor and a memory, said memory having stored therein a machine executable program, and said machine executable program when executed by said processor being adapted to carry out the control method according to any one of claims 1-9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210037963.3A CN116481230A (en) | 2022-01-13 | 2022-01-13 | Refrigerating and freezing device and control method thereof |
| PCT/CN2023/070735 WO2023134541A1 (en) | 2022-01-13 | 2023-01-05 | Refrigerating and freezing apparatus and control method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210037963.3A CN116481230A (en) | 2022-01-13 | 2022-01-13 | Refrigerating and freezing device and control method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116481230A true CN116481230A (en) | 2023-07-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210037963.3A Pending CN116481230A (en) | 2022-01-13 | 2022-01-13 | Refrigerating and freezing device and control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116481230A (en) |
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2022
- 2022-01-13 CN CN202210037963.3A patent/CN116481230A/en active Pending
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