CN113494827B - Refrigerator and control method thereof - Google Patents
Refrigerator and control method thereof Download PDFInfo
- Publication number
- CN113494827B CN113494827B CN202010266861.XA CN202010266861A CN113494827B CN 113494827 B CN113494827 B CN 113494827B CN 202010266861 A CN202010266861 A CN 202010266861A CN 113494827 B CN113494827 B CN 113494827B
- Authority
- CN
- China
- Prior art keywords
- temperature
- refrigeration system
- compression refrigeration
- refrigerator
- determining
- Prior art date
- Legal status (The legal status 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 status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000005057 refrigeration Methods 0.000 claims abstract description 137
- 230000006835 compression Effects 0.000 claims abstract description 112
- 238000007906 compression Methods 0.000 claims abstract description 112
- 238000001816 cooling Methods 0.000 claims abstract description 57
- 239000013078 crystal Substances 0.000 claims description 11
- 230000015654 memory Effects 0.000 claims description 10
- 230000009467 reduction Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 9
- 230000017525 heat dissipation Effects 0.000 description 8
- 238000010257 thawing Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 239000003507 refrigerant Substances 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 238000004321 preservation Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000009246 food effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- 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
- F25D19/00—Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors
- F25D19/04—Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors with more than one refrigeration unit
-
- 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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B25/00—Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00
-
- 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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
-
- 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
- F25D29/003—Arrangement or mounting of control or safety devices for movable 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
- F25D29/00—Arrangement or mounting of control or safety devices
- F25D29/005—Mounting of control 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
- F25D2600/00—Control issues
- F25D2600/06—Controlling according to a predetermined profile
Abstract
The invention provides a refrigerator and a control method thereof, wherein the refrigerator comprises a compression refrigeration system and a Stirling refrigerator which are used for supplying cold for a storage chamber, and the control method comprises the following steps: acquiring a starting signal of the compression refrigeration system; acquiring the compartment temperature of the storage compartment and the evaporator temperature of the compression refrigeration system; determining whether a difference between the compartment temperature and the evaporator temperature is greater than a set temperature difference and the compartment temperature is less than a set temperature; if so, the Stirling refrigerator is driven to operate, so that the Stirling refrigerator is controlled to be started when the storage chamber has a rapid cooling demand, the cooling rate of the storage chamber can be increased, and the food material fresh-keeping demand is met.
Description
Technical Field
The invention relates to a refrigerator, in particular to a refrigerator and a control method thereof.
Background
In the prior art, a single compression refrigeration system is only arranged in a part of refrigerators. When the storage chamber needs to be cooled down quickly, the temperature adjusting speed of the single compression refrigerating system is relatively slow, and the fresh-keeping effect of food materials is influenced to a certain extent.
The Stirling refrigerator is a mechanical refrigerator driven by electric power and has the advantages of high refrigeration efficiency, compact structure, quick start and simple and convenient operation. However, the stirling cryocooler has a short lifetime, cannot meet the long-term operation requirements of a domestic refrigerator, and cannot be directly applied to a refrigerator.
Therefore, how to utilize the compression refrigeration system and the stirling refrigerator to cooperate with each other to improve the cooling rate of the storage chamber in the refrigerator so as to meet the food material preservation requirement becomes a technical problem to be solved urgently by technical personnel in the field.
Disclosure of Invention
An object of the present invention is to provide a refrigerator and a control method thereof that solve at least any one of the above-mentioned technical problems.
A further object of the present invention is to increase the cooling rate of the storage compartment in the refrigerator to meet the food material freshness-retaining requirement.
It is a further object of the present invention to increase the refrigeration efficiency of a stirling cooler using a compression refrigeration system.
It is a further object of the present invention to increase the energy efficiency of a stirling cooler.
According to an aspect of the present invention, there is provided a control method of a refrigerator including a compression refrigeration system for cooling a storage compartment and a stirling cooler, the control method including: acquiring a starting signal of a compression refrigeration system; acquiring the compartment temperature of a storage compartment and the evaporator temperature of a compression refrigeration system; judging whether the difference between the compartment temperature and the evaporator temperature is greater than a set temperature difference or not and the compartment temperature of the storage compartment is reduced to be lower than the set temperature, wherein the difference between the compartment temperature and the evaporator temperature is used for representing a temperature rise value caused by a door opening and closing event, and the set temperature is close to the initial value of a maximum ice crystal generation zone; if yes, the Stirling refrigerator is driven to operate.
Optionally, the step of driving the stirling cooler into operation comprises: determining the power of the Stirling refrigerator; driving Stirling cryocooler to operate according to power
Optionally, the step of determining the power of the stirling cooler comprises: obtaining the cooling rate of the storage chamber; and determining the power of the Stirling refrigerator according to the temperature reduction rate.
Optionally, the step of determining the power of the stirling cooler in dependence on the rate of desuperheating comprises: and determining the power of the Stirling refrigerator corresponding to the cooling rate according to a preset corresponding relation, wherein the corresponding relation is used for recording the power of the Stirling refrigerator corresponding to different numerical value ranges of the cooling rate.
Optionally, the method further comprises the following steps after the Stirling refrigerator is driven to operate: determining an expected state of the compression refrigeration system; the expected state includes an operational state; and under the condition that the expected state is an operating state, determining the operating parameters of the compression refrigeration system, and driving the compression refrigeration system to operate according to the operating parameters.
Optionally, the hot end of the stirling cooler is thermally coupled to the evaporator, and the step of determining the desired state of the compression refrigeration system comprises: acquiring the hot end temperature of the Stirling refrigerator; an expected state of the compression refrigeration system is determined based on the warm end temperature.
Optionally, the step of determining the desired state of the compression refrigeration system based on the warm end temperature comprises: acquiring a preset temperature threshold; judging whether the hot end temperature exceeds a temperature threshold value; if the difference exceeds the preset value, determining that the expected state of the compression refrigeration system is an operation state; in the operating state, the compression refrigeration system utilizes the evaporator to supply cold to the hot end of the Stirling refrigerator.
Optionally, in the case where the expected state is an operating state, the step of determining an operating parameter of the compression refrigeration system comprises: determining the refrigerating temperature of the evaporator according to the hot end temperature; and determining the operating parameters of the compression refrigeration system according to the refrigeration temperature.
Optionally, the hot end of the stirling cooler is thermally coupled to the evaporator, the desired state comprises a shutdown state, and the step of determining the desired state of the compression refrigeration system comprises: judging whether the difference between the accumulated running time length of the refrigerator and the set running time length is smaller than a preset difference threshold value or not; if the value is less than the preset value, determining that the expected state of the compression refrigeration system is a shutdown state; in the shutdown state, the evaporator absorbs heat from the hot end of the stirling cooler.
According to another aspect of the present invention, there is also provided a refrigerator including: a box body, wherein a storage compartment is formed inside the box body; a control device, comprising: a processor and a memory, wherein a control program is stored in the memory, and the control program is used for realizing the control method according to any one of the above items when being executed by the processor.
The refrigerator and the control method thereof provided by the invention have the advantages that the compression refrigeration system and the Stirling refrigerator for supplying cold to the storage chamber are arranged in the refrigerator, when the compression refrigeration system operates, the Stirling refrigerator is driven to operate under the condition that the difference value between the chamber temperature and the evaporator temperature is greater than the set temperature difference and the chamber temperature is less than the set temperature, so that the Stirling refrigerator is controlled to start when the storage chamber has a rapid cooling demand, the cooling rate of the storage chamber can be increased, and the food material fresh-keeping demand is met. The invention utilizes the mutual cooperation of the compression refrigeration system and the Stirling refrigerator, so that the Stirling refrigerator is started only when the storage chamber has the requirement of rapid cooling, thereby not only meeting the requirement of rapid refrigeration, but also prolonging the service life of the refrigerator with the Stirling refrigerator. Because the Stirling refrigerator can produce low temperature of-40 ℃ to-60 ℃, the refrigerator can also produce low temperature of-40 ℃ or even about-60 ℃ by combining the compression refrigeration system and the Stirling refrigerator.
Further, the refrigerator and the control method thereof of the present invention are characterized in that the hot end of the stirling refrigerator is thermally connected to the evaporator, the expected state of the compression refrigeration system can be determined according to the hot end temperature of the stirling refrigerator, the refrigeration temperature of the evaporator can be determined according to the hot end temperature under the condition that the expected state is the operation state, and the operation parameter of the compression refrigeration system can be determined according to the refrigeration temperature, so that the heat dissipation efficiency of the hot end of the stirling refrigerator can be improved by using the evaporator of the compression refrigeration system, and the refrigeration efficiency of the cold end of the stirling refrigerator can be improved.
Further, the refrigerator and the control method thereof of the invention determine the expected state of the compression refrigeration system as a shutdown state under the condition that the difference value between the accumulated operation time length of the refrigerator and the set operation time length of the refrigerator is less than the difference value threshold value, so that the heat generated by the hot end of the Stirling refrigerator is transferred to the evaporator and can be used for defrosting the evaporator, thereby improving the energy utilization efficiency of the Stirling refrigerator, reducing or avoiding the frequency of defrosting the evaporator by using a defrosting heating wire, and preventing the temperature of the storage room from generating large fluctuation.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily to scale. In the drawings:
fig. 1 is a schematic view of a refrigerator according to one embodiment of the present invention;
FIG. 2 is a schematic block diagram of a refrigerator according to one embodiment of the present invention;
FIG. 3 is a schematic diagram of a Stirling refrigerator and an evaporator of a compression refrigeration system in a refrigerator according to one embodiment of the present invention;
fig. 4 is a schematic view of a control method of a refrigerator according to one embodiment of the present invention;
fig. 5 is a control flowchart of a refrigerator according to an embodiment of the present invention.
Detailed Description
Fig. 1 is a schematic diagram of a refrigerator 10 according to one embodiment of the present invention, and fig. 2 is a schematic block diagram of the refrigerator 10 according to one embodiment of the present invention.
The refrigerator 10 may generally include: the refrigerator includes a cabinet 110, a refrigeration system provided in the cabinet 110, and a control device 400. The case 110 has at least one storage compartment 111 formed therein. The temperature zone of the storage compartment 111 can be set arbitrarily. In this embodiment, one storage compartment 111 may be provided, and the storage compartment 111 may be a freezing compartment.
The refrigeration system includes: a compression refrigeration system 200 and a stirling cooler 300. The compression refrigeration system 200 and the stirling cooler 300 are used to cool the storage compartment 111.
The compression refrigeration system 200 may include a compressor, a condenser, a throttling device, and an evaporator 210. The cabinet 110 may further have a refrigerating chamber formed therein for mounting the evaporator 210. The refrigeration compartment may be disposed on the back, top, sides, or bottom of the storage compartment 111. In the compressor operation state, the refrigerant is condensed while releasing heat while passing through the condenser, and is evaporated while absorbing heat while passing through the evaporator 210. The compression refrigeration system 200 may use the refrigerant to absorb heat in the evaporator 210 to change phase to supply cold to the storage compartment 111. The evaporator 210 may cool the storage compartment 111 by a direct cooling method or an air cooling method. The refrigerator 10 may set a cooling temperature by a user. When the compression refrigeration system 200 is operated at the refrigerating temperature indicated by the user and reaches the steady state, the temperature of the evaporator 210 is substantially the same as the preset refrigerating temperature.
The stirling cooler 300, driven by electricity, operates on the principle that the gas performs work by adiabatic expansion, i.e., operates on a reverse stirling cycle to produce refrigeration.
The stirling cooler 300 has a cold end 310 and a hot end 320. The stirling cooler 300 may include a housing, a cylinder, a piston, and a drive mechanism to drive the movement of the piston. Wherein the case may be composed of a main body and a cylindrical part. The drive mechanism may be disposed within the body. The piston may be arranged to reciprocate within the cylinder portion to form a cold end 310 and a hot end 320. Since the structure of the stirling cooler 300 is well known to those skilled in the art, it will not be described in detail.
Fig. 3 is a schematic diagram of the stirling cooler 300 and the evaporator 210 of the compression refrigeration system 200 in the refrigerator 10 according to one embodiment of the present invention.
The cold end 310 of the stirling cooler 300 may be disposed within the storage compartment 111 for cooling the storage compartment 111. The hot end 320 of the stirling cooler 300 may be thermally coupled to the evaporator 210 to dissipate heat from the hot end 320 using the evaporator 210. Because the stirling cooler 300 has a compact structure, in some optional embodiments, the cold end 310 of the stirling cooler 300 may also be disposed in a storage drawer in the storage compartment 111 to deliver cold to the storage drawer, creating a low temperature fresh-keeping environment for the storage drawer.
In some optional embodiments, the refrigerator 10 may further include: and the refrigerating fan 140 is used for promoting the air in the storage compartment 111 to flow to the cold end 310 of the Stirling refrigerator 300. The refrigerating fan 140 is configured to form a heat exchange airflow, so that cold generated by the cold end 310 is rapidly dissipated to each part of the storage chamber 111, and the refrigerating efficiency of the stirling refrigerator 300 and the temperature uniformity in the storage chamber 111 are improved. The cooling fan 140 may be disposed in the storage compartment 111. The cooling fan 140 may be, but is not limited to, a micro axial flow fan or a micro centrifugal fan.
The refrigerator 10 of the present embodiment may further include: a first temperature sensor 130 for detecting a compartment temperature inside the storage compartment 111, and a second temperature sensor 120 for detecting a temperature of the evaporator 210. The first temperature sensor 130 may be disposed in the storage compartment 111. The second temperature sensor 120 may be disposed on the evaporator 210 or in a refrigerating compartment. In some optional embodiments, the evaporator 210 may supply cold to the storage compartment 111 through an air cooling manner, and an air inlet 150 communicating with the air supply duct may be disposed on a peripheral wall of the storage compartment 111. The second temperature sensor 120 may be disposed in the supply air duct and near the evaporator 210.
The control device 400 has a memory 420 and a processor 410, wherein the memory 420 stores a control program 421, and the control program 421 is executed by the processor 410 to implement the control method of the refrigerator 10 according to any one of the following embodiments. The processor 410 may be a Central Processing Unit (CPU), or a digital processing unit (DSP), etc. The memory 420 is used to store programs executed by the processor 410. The memory 420 may be 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, but is not limited to such. Memory 420 may also be a combination of various memories 420. Since the control program 421 is executed by the processor 410 to implement the processes of the method embodiments described below and achieve the same technical effects, the detailed description is omitted here to avoid repetition.
Fig. 4 is a schematic diagram of a control method of the refrigerator 10 according to one embodiment of the present invention. The control method of the refrigerator 10 may generally include:
in step S402, a start signal of the compression refrigeration system 200 is acquired. The compression refrigeration system 200 may be started to operate periodically. In this embodiment, the compression refrigeration system 200 may be controlled to turn on at a first set time after the refrigerator 10 acquires the door open and close event. After the start signal of the compression refrigeration system 200 is acquired, the compression refrigeration system 200 is started to operate and operates according to a preset initial refrigeration temperature, and the initial refrigeration temperature may correspond to an initial operation parameter. The initial operation parameters are configured according to the refrigeration temperature preset by a user. The operating parameters may include: the operating speed of the compressor internal rotors of the compression refrigeration system 200. The refrigerant absorbs heat and vaporizes while flowing through the evaporator 210, and the evaporator 210 supplies cold to the storage compartment 111. The first set time may be any value in the range of 1min to 10min, and may be, for example, 1min,5min, or 10min.
In the process of opening and closing the door, when the door body of the refrigerator 10 is in an open state, the inside and the outside of the refrigerator body 110 are exchanged, and thus the temperature in the storage compartment 111 fluctuates. The compression refrigeration system 200 is controlled to open after the door opening and closing event, so that the temperature of the storage compartment 111 can be gradually restored to be within the set temperature range.
In step S404, the compartment temperature of the storage compartment 111 and the evaporator 210 temperature of the compression refrigeration system 200 are obtained. After the refrigerator 10 is closed, the wake-up commands of the first temperature sensor 130 and the second temperature sensor 120 are obtained, and the first temperature sensor 130 and the second temperature sensor 120 are driven to detect the temperature of the storage compartment 111 and the temperature of the evaporator 210, respectively.
The wake-up command may be a command issued by the processor 410 to instruct the first temperature sensor 130 and the second temperature sensor 120 to switch from the shutdown state to the operating state. The temperature of the storage compartment 111 detected by the first temperature sensor 130 at a second set time after the refrigerator 10 is closed is set as the compartment temperature. The temperature of the evaporator 210 detected by the second temperature sensor 120 at a second set time after the refrigerator 10 is closed is set as the evaporator 210 temperature. The second set duration is greater than the first set duration. The second set time period may be any value in the range of 1.5min to 15min, and may be, for example, 1.5min,5min,10min, or 15min.
After the refrigerator 10 is closed for the second set time, the temperature in the storage compartment 111 is uniform, and the compartment temperature may be used to indicate the real-time temperature of the storage compartment 111 after the door opening and closing event is finished. After the refrigerator 10 is closed for the second set time, the compression refrigeration system 200 reaches the steady operation state, and the temperature of the evaporator 210 is substantially equal to the preset refrigeration temperature. The evaporator 210 temperature may also be close to the preset refrigeration temperature.
Step S406, judging whether the difference between the compartment temperature and the evaporator 210 temperature is greater than a set temperature difference and the compartment temperature of the storage compartment is reduced to be lower than the set temperature, wherein the difference between the compartment temperature and the evaporator temperature is used for representing a heating value caused by a door opening and closing event, the set temperature is close to the initial value of the maximum ice crystal generation zone, if the difference between the compartment temperature and the evaporator 210 temperature is greater than the set temperature difference and the compartment temperature of the storage compartment is reduced to be lower than the set temperature, driving the Stirling refrigerator 300 to operate, and if the difference between the compartment temperature and the evaporator 210 temperature is smaller than or equal to the set temperature difference or the compartment temperature is greater than or equal to the set temperature, not starting the Stirling refrigerator 300.
If the door of refrigerator 10 remains closed for a long period of time, or for a third set period of time, the temperature in storage compartment 111 is substantially equal to the temperature of evaporator 210. The difference between the above-described compartment temperature and the evaporator 210 temperature may be used to represent a warm-up value resulting from a door open and close event. If the difference is large, it indicates that the temperature rise value caused by the door opening and closing event is large, the fluctuation range of the temperature in the storage compartment 111 is large, and if the compression refrigeration system 200 is operated alone, a relatively long time is required to recover the temperature in the storage compartment 111 to be within the set temperature range; if the difference value is small, it indicates that the temperature rise value caused by the door opening and closing event is small, the fluctuation range of the temperature in the storage compartment 111 is small, and if the compression refrigeration system 200 is operated alone, a relatively short time is required to restore the temperature in the storage compartment 111 to the set temperature range.
After the compression refrigeration system 200 is started to operate, the temperature in the storage compartment 111 can be gradually reduced. For most food materials, approximately 80% of the water can freeze to ice when the temperature is reduced from-1 ℃ to-5 ℃. Most ice crystals form in the temperature range of-1 to-5 ℃. This temperature interval is called the maximum ice crystal growth zone. The initial value of the maximum ice crystal growth zone is-1 deg.C, and the final value of the maximum ice crystal growth zone is-5 deg.C. In the freezing process, the shorter the time for generating the zone through the largest ice crystal is, the better the preservation quality is.
The set temperature is set by the user according to actual needs. For example, the temperature range may be set. The set temperature may be close to the starting value of the maximum ice crystal generation zone described above. The set temperature may be any value between-1 ℃ and 2 ℃, for example, -1 ℃,0 ℃,1 ℃ or 2 ℃. The set temperature of the present embodiment may be 0 ℃.
The set temperature difference may be any value greater than or equal to 5 deg.c, and may be, for example, 5 deg.c.
When the difference between the compartment temperature and the evaporator 210 temperature is greater than the set temperature difference and the compartment temperature is reduced to below the set temperature, after the Stirling refrigerator 300 is driven to operate, the compression refrigeration system 200 and the Stirling refrigerator 300 can be used for simultaneously supplying cold to the storage compartment 111, the cooling rate of the storage compartment 111 is improved, the compartment temperature can rapidly pass through the maximum ice crystal generation zone, the rapid cooling requirement of the storage compartment 111 is met, and the food material fresh-keeping effect is improved.
The step of driving the stirling cooler 300 to operate includes: determining the power of the Stirling refrigerator 300, and driving the Stirling refrigerator 300 to operate according to the power. The step of determining the power of the stirling cooler 300 comprises: and acquiring the cooling rate of the storage compartment 111, and determining the power of the Stirling refrigerator 300 according to the cooling rate. The step of determining the power of the stirling cooler 300 from the rate of decrease in temperature includes: and determining the power of the Stirling refrigerator 300 corresponding to the cooling rate according to a preset corresponding relation, wherein the corresponding relation is used for recording the power of the Stirling refrigerator 300 corresponding to different numerical ranges of the cooling rate.
The power of the stirling cooler 300 is the cooling power, and the cooling power of the stirling cooler 300 can be indirectly adjusted by adjusting the output power of the motor by adjusting the driving voltage of the motor in the driving mechanism of the stirling cooler 300.
The stirling cooler 300 may be pre-charged with a number of different powers. Each power may correspond to one cold end 310 temperature. When the Stirling refrigerator 300 operates at different powers, the cold end 310 may supply cold to the storage compartment 111 at different temperature states, thereby obtaining different refrigeration efficiencies. The power of the Stirling refrigerator 300 is determined according to the cooling rate of the storage chamber 111, and the difference between the actual cooling rate and the expected cooling rate can be made up by adjusting the power of the Stirling refrigerator 300, so that the refrigerator can be rapidly cooled by matching the compression refrigeration system 200 and the Stirling refrigerator 300 and utilizing the appropriate cooling rate.
The temperatures of the storage compartment 111 are detected by the first temperature sensor 130 at the fourth set time and the fifth set time after the refrigerator 10 is closed, and are respectively recorded as the first temperature and the second temperature. And calculating the difference value between the first temperature and the second temperature, recording the difference value as a first difference value, and calculating the difference value between the fifth set time and the fourth set time, recording the difference value as a second difference value. And calculating the ratio of the first difference to the second difference to obtain the cooling rate of the storage chamber 111. The fifth set time is greater than the fourth set time. The fourth set time may be equal to or greater than the second set time.
By using the method, the power of the Stirling refrigerator 300 is determined according to the cooling rate, so that the Stirling refrigerator 300 can operate according to the actual cooling state and the appropriate refrigerating efficiency, the requirement of rapid cooling is met, and unnecessary energy consumption is reduced.
The number of the above numerical ranges may be any number, for example, but not limited to, two, three, four, or five. The number of settings of the range of values may be the same as the number of configurations of the power of the stirling cooler 300. The power of the stirling cooler 300 may be increased as the cool down rate decreases. In the present embodiment, the number of the numerical ranges may be three, and include a first threshold range, a second threshold range, and a third threshold range, and may be, for example, (2, 15) ° c/min, [1,2] ° c/min, (0, 1) ° c/min, respectively. Correspondingly, the power of the stirling cooler 300 may be the first power, the second power, and the third power, and may be, for example, 40W, 50W, and 60W, respectively. The cold end 310 temperatures corresponding to the first power, the second power, and the third power may be the first temperature, the second temperature, and the third temperature, respectively, and may be, for example, -20 ℃, -40 ℃, -60 ℃, respectively.
Determining the power of the stirling cooler 300 as: the power corresponding to the range of values to which the cooling rate belongs. For example, if it is detected that the temperature decrease rate is 1.5 ℃/min, the numerical range to which the temperature decrease rate belongs is the second threshold range, and the power of the stirling cooler 300 is determined to be the second power.
When the stirling cooler 300 is turned on, the cooling fan 140 may be synchronously turned on to accelerate the heat exchange between the air inside the storage compartment 111 and the cold end 310 of the stirling cooler 300.
After driving the stirling cooler 300 to operate, the method further includes: an expected state of the compression refrigeration system 200 is determined, which may include an operating state and a shutdown state. In the case where the expected state is an operation state, an operation parameter of the compression refrigeration system 200 is determined, and the compression refrigeration system 200 is driven to operate according to the operation parameter. In the case where the expected state is a shutdown state, the compression refrigeration system 200 may be driven to shutdown.
Wherein the step of driving the compression refrigeration system 200 to operate according to the operation parameters may include: under the condition that the determined operation parameters are inconsistent with the initial operation parameters of the compression refrigeration system 200, driving the compression refrigeration system 200 to adjust according to the operation parameters; and under the condition that the determined operation parameters are consistent with the initial operation parameters of the compression refrigeration system 200, driving the compression refrigeration system 200 to not adjust the operation parameters. The operating parameters may include an operating speed of a rotor inside a compressor in the compression refrigeration system 200.
Wherein the hot end 320 of the stirling cooler 300 is thermally coupled to the evaporator 210, the step of determining the desired state of the compression refrigeration system 200 comprises: the hot end 320 temperature of the stirling cooler 300 is obtained and the desired state of the compression refrigeration system 200 is determined based on the hot end 320 temperature. The step of determining the desired state of the compression refrigeration system 200 based on the hot end 320 temperature includes: acquiring a preset temperature threshold; judging whether the temperature of the hot end 320 exceeds a temperature threshold value, and if so, determining that the expected state of the compression refrigeration system 200 is an operation state; in operation, the compression refrigeration system 200 utilizes the evaporator 210 to provide cooling to the hot end 320 of the stirling cooler 300.
The temperature threshold value can be preset in a plurality of numbers. One power of the stirling cooler 300 is set to correspond to one temperature threshold. The step of obtaining the preset temperature threshold comprises: the corresponding temperature threshold is determined based on the power of the stirling cooler 300. That is, the temperature threshold value corresponding to the power of the stirling cooler 300 is determined as the temperature threshold value. Each temperature threshold is set according to a reasonable temperature variation range of the temperature of the hot end 320 when the stirling cooler 300 is operating at one power.
The heat dissipation efficiency of the hot end 320 of the stirling cooler 300 affects the cooling efficiency of the cold end 310, and increasing the heat dissipation efficiency of the hot end 320 may correspondingly increase the cooling efficiency of the cold end 310. When the temperature of the hot end 320 exceeds the temperature threshold, it indicates that the heat dissipation efficiency of the hot end 320 is not good, which may result in the cold end 310 failing to supply cold according to the expected cooling efficiency, and the cold end 310 has poor cooling efficiency.
Wherein, in the case that the expected state is an operation state, the step of determining the operation parameters of the compression refrigeration system 200 includes: the refrigerant temperature of the evaporator 210 is determined based on the warm end 320 temperature and the operating parameters of the compression refrigeration system 200 are determined based on the refrigerant temperature. The refrigeration temperature of each evaporator 210 is correspondingly set to be within the applicable warm end 320 temperature range. The cooling temperature of the evaporator 210 is determined according to the temperature range of the hot side 320 to which the temperature of the hot side 320 belongs. The operating parameters of the compression refrigeration system 200 are configured accordingly based on the refrigeration temperature. When the temperature of the hot end 320 of the stirling cooler 300 increases, the cooling temperature of the evaporator 210 is correspondingly reduced by adjusting the operating speed of the rotor inside the compressor, so as to improve the heat dissipation efficiency of the hot end 320.
The hot end 320 of the Stirling refrigerator 300 is arranged to be thermally connected with the evaporator 210, when the Stirling refrigerator 300 operates according to the determined power, whether the heat dissipation efficiency of the hot end 320 is normal or not can be determined by monitoring the temperature of the hot end 320 of the Stirling refrigerator 300 and comparing the temperature of the hot end 320 with a temperature threshold, and when the heat dissipation efficiency of the hot end 320 is abnormal, the operating parameter of the compression refrigeration system 200 is determined according to the temperature of the hot end 320, and the compression refrigeration system 200 is driven to continue to operate according to the determined operating parameter, that is, when the temperature of the hot end 320 is higher than the temperature threshold, the compression refrigeration system 200 is driven to reduce the refrigeration temperature, so that the refrigeration efficiency of the compression refrigeration system 200 is improved, the evaporator 210 of the compression refrigeration system 200 can be used for improving the heat dissipation efficiency of the hot end 320 of the Stirling refrigerator 300, and the refrigeration efficiency of the cold end 310 of the Stirling refrigerator 300 is improved. By using the method, the compression refrigeration system 200 and the Stirling refrigerator 300 are matched with each other, so that the cooling efficiency of the storage chamber 111 is improved, and the quick recovery of the fresh-keeping atmosphere of the storage chamber 111 is facilitated.
During operation of the stirling cooler 300, the first temperature sensor 130 detects the compartment temperature within the storage compartment 111. When the compartment temperature falls below the preset first shutdown temperature, and the compartment temperature is maintained below the first shutdown temperature for a period of time exceeding a preset sixth setting, the stirling cooler 300 may be shut down. If the compression refrigeration system 200 is in an operating state when the stirling cooler 300 is stopped, the compression refrigeration system 200 may operate according to the preset initial operating parameters after the stirling cooler 300 is stopped. The first shutdown temperature may be close to the termination of the maximum ice crystal generation zone. The first shutdown temperature may be any value between-10 ℃ and-5 ℃, for example, -5 ℃, -8 ℃ or-10 ℃. The first shutdown temperature for this embodiment may be-5 ℃. The sixth set time period may be any value in the range of 1min to 10min, and may be, for example, 1min,5min, or 10min.
In other alternative embodiments, the method of determining the expected state of the compression refrigeration system 200 may be varied. For example, the step of determining the expected state of the compression refrigeration system 200 includes: and judging whether the difference value between the accumulated operation time length and the set operation time length of the compression refrigeration system 200 is smaller than a difference value threshold value, if so, determining that the expected state of the compression refrigeration system 200 is a shutdown state, and in the shutdown state, absorbing the heat of the hot end 320 of the Stirling refrigerator 300 by the evaporator 210.
For the sake of distinction, the "set operation time period" herein may be a seventh set operation time period. In general, when there is no rapid cooling demand in the storage compartment 111, the system may be stopped and enter the defrosting mode when the accumulated operation duration of the compression refrigeration system 200 reaches the set operation duration. For example, a defrosting heater wire on the evaporator 210 may be driven to be electrically operated to heat the evaporator 210. In the case where the storage compartment 111 has a rapid cooling demand, when the difference between the accumulated operating time period of the compression refrigeration system 200 and the set operating time period is less than the difference threshold, it indicates that the accumulated operating time period of the compression refrigeration system 200 is close to the set operating time period. The set operation time period may be any value in the range of 8 to 20h, and may be 8h, for example. The difference threshold may be any value within a range of thirty percent to ten percent of the set operation time period, and the difference threshold of the present embodiment may be thirty percent of the set operation time period, for example, may be 0.24h.
With the above method, in the refrigerator 10 of the embodiment, when the difference between the accumulated operating time of the refrigerator 10 and the set operating time is smaller than the difference threshold, it is determined that the expected state of the compression refrigeration system 200 is the shutdown state, so that the heat generated by the hot end 320 of the stirling refrigerator 300 is transferred to the evaporator 210, and can be used for defrosting the evaporator 210, thereby improving the energy utilization efficiency of the stirling refrigerator 300, reducing or avoiding the frequency of defrosting the evaporator 210 by using a defrosting heating wire, and preventing the temperature of the storage compartment 111 from generating large fluctuation.
The above embodiment is only exemplified by a case of one storage compartment 111, but should not be considered as a limitation to the number of the storage compartments 111, and a person skilled in the art should have full capability of expansion on the basis of understanding the above embodiment, and no further description is given here.
Fig. 5 is a control flow chart of an air conditioner indoor unit according to an embodiment of the present invention.
Step S502, a start signal of the compression refrigeration system 200 is acquired. After the start signal of the compression refrigeration system 200 is acquired, the compression refrigeration system 200 is started to operate and operates according to the preset initial operation parameters.
In step S504, the compartment temperature of the storage compartment 111 and the evaporator 210 temperature of the compression refrigeration system 200 are acquired. The temperature of the storage compartment 111 detected by the first temperature sensor 130 at a second set time after the refrigerator 10 is closed is set as the compartment temperature. The temperature of the evaporator 210 detected by the second temperature sensor 120 at a second set time after the refrigerator 10 is closed is set as the evaporator 210 temperature.
In step S506, it is determined whether the difference between the compartment temperature and the temperature of the evaporator 210 is greater than the set temperature difference and the compartment temperature is less than the set temperature, if so, step S508 is performed, otherwise, step S524 is performed.
In step S508, the power of the stirling cooler 300 is determined. And determining the power of the Stirling refrigerator 300 corresponding to the cooling rate according to a preset corresponding relation, wherein the corresponding relation is used for recording the power of the Stirling refrigerator 300 corresponding to different numerical ranges of the cooling rate.
And step S510, driving the stirling cooler 300 to operate according to the power.
In step S512, an expected state of the compression refrigeration system 200 is determined.
In step S514, in the case where the expected state is the operating state, the temperature of the hot end 320 of the stirling cooler 300 is acquired. In operation, the compression refrigeration system 200 utilizes the evaporator 210 to provide cooling to the hot end 320 of the stirling cooler 300.
In step S516, a preset temperature threshold is obtained. One power of the stirling cooler 300 is set to correspond to one temperature threshold. The corresponding temperature threshold is determined based on the power of the stirling cooler 300. That is, the temperature threshold value corresponding to the power of the stirling cooler 300 is determined as the temperature threshold value.
In step S518, when the hot side 320 temperature exceeds the temperature threshold, the cooling temperature of the evaporator 210 is determined according to the hot side 320 temperature.
Step S520, determining the operation parameters of the compression refrigeration system 200 according to the refrigeration temperature.
In step S522, the compression refrigeration system 200 is driven to operate according to the operation parameters.
In step S524, the stirling cooler 300 is not started.
With the above method, the refrigerator 10 of the present embodiment, can be applied to food materials or medicines with a severe requirement on the preservation atmosphere. When the compression refrigeration system 200 operates, the stirling refrigerator 300 is driven to operate under the condition that the difference between the room temperature and the temperature of the evaporator 210 is greater than the set temperature difference and the room temperature is less than the set temperature, so that the stirling refrigerator 300 is controlled to start when the storage room 111 has a rapid cooling demand, the cooling rate of the storage room 111 can be increased, and the food material fresh-keeping demand is met. In the embodiment, the compression refrigeration system 200 and the stirling refrigerator 300 are matched with each other, so that the stirling refrigerator 300 is started only when the storage compartment 111 has a rapid cooling requirement, the requirement of rapid refrigeration can be met, and the service life of the refrigerator 10 with the stirling refrigerator 300 can be prolonged. Because the Stirling refrigerator 300 can produce low temperature of about 40 ℃ below zero to 60 ℃ below zero, the combination of the compression refrigeration system 200 and the Stirling refrigerator 300 also enables the refrigerator to produce low temperature of about 40 ℃ below zero and even about 60 ℃ below zero.
Thus, it should be appreciated by those skilled in the art that while various exemplary embodiments of the invention have been shown and described in detail herein, many other variations or modifications which are consistent with the principles of this invention may be determined or derived directly from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.
Claims (8)
1. A control method of a refrigerator including a compression refrigeration system and a stirling cooler for cooling a storage compartment, the control method comprising:
acquiring a starting signal of the compression refrigeration system;
acquiring the compartment temperature of the storage compartment and the evaporator temperature of the compression refrigeration system;
judging whether the difference between the compartment temperature and the evaporator temperature is larger than a set temperature difference or not and the compartment temperature of the storage compartment is reduced below the set temperature, wherein the difference between the compartment temperature and the evaporator temperature is used for representing a temperature rise value caused by a door opening and closing event, and the set temperature is close to the initial value of a maximum ice crystal generation zone;
if so, driving the Stirling refrigerator to operate; wherein
The step of driving the stirling cooler to operate comprises: determining the power of the stirling cooler; driving the Stirling refrigerator to operate according to the power; and is
The step of determining the power of the stirling cooler comprises: obtaining the cooling rate of the storage chamber; and determining the power of the Stirling refrigerator according to the temperature reduction rate.
2. The control method according to claim 1, wherein the step of determining the power of the stirling cooler in accordance with the cool-down rate includes:
and determining the power of the Stirling refrigerator corresponding to the cooling rate according to a preset corresponding relation, wherein the corresponding relation is used for recording the power of the Stirling refrigerator corresponding to different numerical ranges of the cooling rate.
3. The control method according to claim 1, wherein after the driving of the stirling cooler, further comprising:
determining an expected state of the compression refrigeration system; the expected state comprises an operational state;
and under the condition that the expected state is the operation state, determining the operation parameters of the compression refrigeration system, and driving the compression refrigeration system to operate according to the operation parameters.
4. The control method of claim 3, wherein the hot end of the Stirling cooler is thermally coupled to the evaporator, and the step of determining the desired state of the compression refrigeration system comprises:
acquiring the temperature of the hot end of the Stirling refrigerator;
and determining the expected state of the compression refrigeration system according to the hot end temperature.
5. The control method of claim 4 wherein said step of determining an expected state of said compression refrigeration system based on said warm end temperature comprises:
acquiring a preset temperature threshold;
judging whether the hot end temperature exceeds the temperature threshold value;
if the operating state of the compression refrigeration system is not the operating state, determining that the expected state of the compression refrigeration system is the operating state; in the operating state, the compression refrigeration system supplies cold to the hot end of the Stirling refrigerator by using the evaporator.
6. A control method as set forth in claim 5, wherein said step of determining an operating parameter of the compression refrigeration system in the event that the expected condition is the operating condition includes:
determining the refrigeration temperature of the evaporator according to the hot end temperature;
and determining the operating parameters of the compression refrigeration system according to the refrigeration temperature.
7. The control method of claim 3, wherein the hot end of the Stirling cooler is thermally coupled to the evaporator, the desired state comprises a shutdown state, and the step of determining the desired state of the compression refrigeration system comprises:
judging whether the difference between the accumulated running time length of the refrigerator and the set running time length is smaller than a preset difference threshold value or not;
if so, determining the expected state of the compression refrigeration system as the shutdown state; in the shutdown state, the evaporator absorbs heat from the hot end of the stirling cooler.
8. A refrigerator, comprising:
a box body, wherein a storage chamber is formed inside the box body;
a control device, comprising: a processor and a memory, the memory having stored therein a control program for implementing the control method according to any one of claims 1-7 when executed by the processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010266861.XA CN113494827B (en) | 2020-04-07 | 2020-04-07 | Refrigerator and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010266861.XA CN113494827B (en) | 2020-04-07 | 2020-04-07 | Refrigerator and control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113494827A CN113494827A (en) | 2021-10-12 |
| CN113494827B true CN113494827B (en) | 2023-03-17 |
Family
ID=77995697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010266861.XA Active CN113494827B (en) | 2020-04-07 | 2020-04-07 | Refrigerator and control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113494827B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114812088B (en) * | 2021-01-28 | 2023-02-24 | 合肥美的电冰箱有限公司 | Refrigeration equipment, control method and device thereof, electronic equipment and storage medium |
| CN114992943A (en) * | 2022-05-30 | 2022-09-02 | 海信（山东）冰箱有限公司 | Refrigerator and refrigeration system control method |
| CN115218602B (en) * | 2022-06-27 | 2023-08-11 | 青岛海尔生物医疗股份有限公司 | Method and device for controlling temperature of refrigerator, refrigerator and storage medium |
| CN116358204A (en) * | 2023-03-31 | 2023-06-30 | 珠海格力电器股份有限公司 | Compressor control method, storage box and storage medium |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105466107A (en) * | 2014-07-31 | 2016-04-06 | 青岛海尔智能技术研发有限公司 | Freezing and cold storage device and control method |
| CN106403442A (en) * | 2015-07-31 | 2017-02-15 | 青岛海尔智能技术研发有限公司 | Refrigerator and defrosting method thereof |
| CN106500386A (en) * | 2016-12-28 | 2017-03-15 | 宁波华斯特林电机制造有限公司 | Chiller based on CETRINE motor |
| CN207065969U (en) * | 2017-03-31 | 2018-03-02 | 宁波华斯特林电机制造有限公司 | A kind of multi gear ice chest |
| CN107751713A (en) * | 2016-08-22 | 2018-03-06 | 九阳股份有限公司 | A kind of food nutrition freezing method |
| CN110906672A (en) * | 2019-10-11 | 2020-03-24 | 合肥晶弘电器有限公司 | Quick-freezing control method for reducing food freezing damage and quick-freezing refrigerator |
-
2020
- 2020-04-07 CN CN202010266861.XA patent/CN113494827B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105466107A (en) * | 2014-07-31 | 2016-04-06 | 青岛海尔智能技术研发有限公司 | Freezing and cold storage device and control method |
| CN106403442A (en) * | 2015-07-31 | 2017-02-15 | 青岛海尔智能技术研发有限公司 | Refrigerator and defrosting method thereof |
| CN107751713A (en) * | 2016-08-22 | 2018-03-06 | 九阳股份有限公司 | A kind of food nutrition freezing method |
| CN106500386A (en) * | 2016-12-28 | 2017-03-15 | 宁波华斯特林电机制造有限公司 | Chiller based on CETRINE motor |
| CN207065969U (en) * | 2017-03-31 | 2018-03-02 | 宁波华斯特林电机制造有限公司 | A kind of multi gear ice chest |
| CN110906672A (en) * | 2019-10-11 | 2020-03-24 | 合肥晶弘电器有限公司 | Quick-freezing control method for reducing food freezing damage and quick-freezing refrigerator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113494827A (en) | 2021-10-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113494827B (en) | Refrigerator and control method thereof | |
| CN103502745B (en) | Refrigeration controler | |
| US10753675B2 (en) | Refrigerator and method of controlling the same | |
| Ghadiri et al. | The effect of selecting proper refrigeration cycle components on optimizing energy consumption of the household refrigerators | |
| EP0558095A2 (en) | Apparatus for controlling a dual evaporator, dual fan refrigerator with independent temperature controls | |
| CN102345965A (en) | All-weather energy saving method and all-weather energy saving device for refrigerator and all-weather energy saving refrigerator | |
| US20140020411A1 (en) | Flexible Use of an Inverter in a Refrigeration Unit | |
| US11371768B2 (en) | Refrigerator and method for controlling the same | |
| JP2013092291A (en) | Refrigerator and freezer device | |
| CN112639382B (en) | Refrigerator and control method thereof | |
| CN111059827B (en) | Refrigerator and control method thereof | |
| CN115265046B (en) | Refrigerator and control method thereof | |
| CN116294335A (en) | Sectional control method for ice maker | |
| JP5862867B2 (en) | refrigerator | |
| CN113048716B (en) | Control method and refrigerator | |
| JP2001056173A (en) | Freezer/refrigerator | |
| JP5261106B2 (en) | Cooling system | |
| JP6166771B2 (en) | refrigerator | |
| JP2020106204A (en) | On-vehicle refrigeration device | |
| CN115435538B (en) | Refrigerator and defrosting control method thereof | |
| CN111578549B (en) | Condensing unit capable of adjusting cooling capacity and control method thereof | |
| KR102437449B1 (en) | Cooling apparatus and control method thereof | |
| CN114440529B (en) | Energy-saving control method for refrigerating system of refrigerator and refrigerator | |
| KR100307071B1 (en) | Cold water producing refrigerating apparatus and method of controlling cooling capacity thereof | |
| CN109307400B (en) | Refrigerator refrigerating capacity control method and device and refrigerator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |