CN115597281A - Refrigerating and freezing device and control method thereof - Google Patents
Refrigerating and freezing device and control method thereof Download PDFInfo
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- CN115597281A CN115597281A CN202110772581.0A CN202110772581A CN115597281A CN 115597281 A CN115597281 A CN 115597281A CN 202110772581 A CN202110772581 A CN 202110772581A CN 115597281 A CN115597281 A CN 115597281A
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- 238000000034 method Methods 0.000 title claims abstract description 42
- 238000007710 freezing Methods 0.000 title claims abstract description 37
- 230000008014 freezing Effects 0.000 title claims abstract description 36
- 238000009825 accumulation Methods 0.000 claims abstract description 97
- 238000005057 refrigeration Methods 0.000 claims abstract description 88
- 238000001816 cooling Methods 0.000 claims description 77
- 230000015654 memory Effects 0.000 claims description 10
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 230000001737 promoting effect Effects 0.000 claims description 3
- 239000003570 air Substances 0.000 description 19
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- 238000010586 diagram Methods 0.000 description 6
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- 230000000694 effects Effects 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
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- 238000012545 processing Methods 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
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- 230000003111 delayed effect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
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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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
- F25B39/02—Evaporators
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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
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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
- F25D29/00—Arrangement or mounting of control or safety devices
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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
- F25D3/00—Devices using other cold materials; Devices using cold-storage bodies
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- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
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- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The invention provides a cold storage and freezing device and a control method thereof, wherein the cold storage and freezing device is provided with a storage chamber and a refrigerating chamber, wherein an evaporator for supplying cold to the storage chamber and a cold accumulation device for accumulating cold released by the evaporator are arranged in the refrigerating chamber; the refrigeration chamber is closed in a controlled manner when the evaporator stops supplying cold; and the control method comprises: determining that the refrigeration chamber is closed; detecting the temperature of the storage chamber; judging whether the temperature of the storage chamber exceeds a preset temperature threshold value or not; if so, the refrigerating chamber is opened to supply cold to the storage chamber by utilizing the cold energy accumulated by the cold accumulation device. The refrigerating and freezing device can utilize the cold energy accumulated by the cold accumulation device to supply cold to the storage chamber, so the temperature of the storage chamber can be reduced under the condition of not starting the evaporator.
Description
Technical Field
The present invention relates to refrigeration, and more particularly to a refrigerating and freezing apparatus and a control method thereof.
Background
Refrigerating and freezing apparatuses, such as refrigerators, freezers, and refrigerated cabinets, use evaporators to supply cooling energy to storage compartments. The refrigerant evaporates in the evaporator absorbing heat, causing the surface temperature of the evaporator to decrease, thereby providing cooling energy to the ambient air.
Generally, when the temperature of the storage compartment is reduced to a temperature lower than a set temperature, the evaporator stops cooling. The inventors have recognized that the temperature of the compartment gradually rises over time, and therefore, it is necessary to activate the evaporator so that the temperature of the compartment returns to below the set temperature.
Disclosure of Invention
It is an object of the present invention to overcome at least one of the technical drawbacks of the prior art and to provide a refrigerating and freezing apparatus and a control method thereof.
A further object of the invention is to reduce the temperature of the storage compartment without starting the evaporator.
It is a further object of the present invention to improve the energy efficiency of a refrigeration chiller.
It is a still further object of the present invention to ensure the cooling effect of a refrigeration freezer.
According to an aspect of the present invention, there is provided a control method of a refrigerating and freezing apparatus having a storage compartment and a refrigerating compartment, wherein an evaporator for supplying cold to the storage compartment and a cold storage device for storing cold released from the evaporator are provided in the refrigerating compartment; the refrigeration chamber is closed in a controlled manner when the evaporator stops supplying cold; and the control method comprises: determining the refrigeration chamber is closed; detecting the temperature of the storage chamber; judging whether the temperature of the storage chamber exceeds a preset temperature threshold value or not; if so, the refrigerating chamber is opened to supply cold to the storage chamber by utilizing the cold energy accumulated by the cold accumulation device.
Optionally, before opening the refrigeration chamber, further comprising: acquiring the cold accumulation amount of the cold accumulation device, wherein the cold accumulation amount is used for marking the cold accumulated by the cold accumulation device when the evaporator supplies cold; the working state of the evaporator is adjusted according to the cold accumulation amount of the cold accumulation device, and the working state comprises a cold supply state and a cold supply stop state.
Alternatively, the step of adjusting the cooling state of the evaporator according to the cold storage amount of the cold storage device includes: determining that the evaporator is in a cooling stop state; acquiring target required cooling capacity of the storage chamber, wherein the target required cooling capacity is used for marking the cooling capacity required by the storage chamber; judging whether the cold accumulation amount of the cold accumulation device is more than or equal to the target required cold amount or not; if not, the evaporator is started to adjust the state from the cooling stop state to the cooling state.
Optionally, the step of obtaining the target required refrigeration capacity of the storage compartment includes: acquiring the set temperature of the storage chamber; and determining the target required cold quantity according to the set temperature of the storage chamber.
Optionally, the step of obtaining the cold storage amount of the cold storage device comprises: acquiring a historical cooling record of an evaporator; and calculating the cold accumulation amount of the cold accumulation device according to the historical cold supply record of the evaporator.
Optionally, in the step of obtaining the cold storage amount of the cold storage device, a historical cold supply record of the evaporator records cold supply parameters of the last cold supply of the evaporator, and the cold supply parameters include a coil temperature of the evaporator and a cold supply duration.
Optionally, the step of calculating the cold storage amount of the cold storage device according to the history cold supply record of the evaporator comprises: determining the cold accumulation rate of the cold accumulation device according to the temperature of the coil; and calculating the cold accumulation amount of the cold accumulation device according to the cold accumulation rate of the cold accumulation device and the cold supply duration of the evaporator.
Optionally, the refrigerating and freezing device is further provided with an air supply fan which is arranged in the refrigerating chamber or at the downstream of the refrigerating chamber and is used for promoting the formation of air supply flow flowing from the refrigerating chamber to the storage compartment; and while opening the refrigeration compartment, the control method further comprises: and starting the air supply fan.
According to another aspect of the present invention, there is also provided a refrigeration and freezing apparatus comprising: the refrigerator comprises a box body, a storage compartment and a refrigerating compartment, wherein the storage compartment and the refrigerating compartment are formed in the box body; the evaporator is arranged in the refrigerating chamber and used for supplying cold to the storage chamber; the cold accumulation device is arranged in the refrigerating chamber and used for accumulating cold energy released by the evaporator; and the refrigeration chamber is controllably closed when the evaporator stops supplying cold; and a processor and a memory, the memory having stored therein a machine executable program, the machine executable program when executed by the processor being for implementing a control method according to any of the above.
Optionally, the refrigeration compartment comprises: a bottom wall; a plurality of side walls extending upwardly from the edges of the bottom wall, respectively, so as to enclose with the bottom wall a refrigeration compartment having an open top; the cold accumulation device forms at least one side wall of the refrigeration chamber; and the refrigerating and freezing device also comprises a controllable air door which is controlled to be arranged at the top opening part in an opening and closing way, thereby opening or closing the refrigerating chamber.
According to the refrigeration and freezing device and the control method thereof, the cold accumulation device is arranged in the refrigeration chamber, so that cold energy can be accumulated when the evaporator supplies cold, the refrigeration chamber is opened when the temperature of the storage chamber exceeds a preset temperature threshold value by monitoring the temperature of the storage chamber, and the refrigeration and freezing device can supply cold to the storage chamber by using the cold energy accumulated by the cold accumulation device, so that the temperature of the storage chamber can be reduced under the condition of not starting the evaporator.
Further, according to the refrigeration and freezing device and the control method thereof, as the surface temperature of the evaporator is still low when the cooling is stopped, more cooling capacity can be released to the surrounding environment, the cooling capacity released by the evaporator is accumulated by the cold accumulation device, and the cooling capacity is supplied to the storage compartment by the cold accumulation device when the storage compartment has a refrigeration demand, which is beneficial to improving the energy efficiency of the refrigeration and freezing device.
Furthermore, according to the refrigeration and freezing device and the control method thereof, before the refrigeration chamber is opened, the cold accumulation amount of the cold accumulation device is obtained, and the working state of the evaporator is adjusted according to the cold accumulation amount of the cold accumulation device, so that the evaporator can be used for supplying cold to the storage chamber when the cold accumulation amount of the cold accumulation device cannot meet the target cold demand of the storage chamber, and the refrigeration effect of the refrigeration and freezing device can be ensured.
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 drawn to scale. In the drawings:
FIG. 1 is a schematic block diagram of a refrigeration freezer apparatus according to one embodiment of the present invention;
fig. 2 is a schematic structural view of a refrigeration freezer according to one embodiment of the invention;
fig. 3 is a schematic diagram of a method of controlling a refrigeration chiller according to one embodiment of the present invention;
fig. 4 is a control flow diagram of a refrigeration chiller according to an embodiment of the present invention;
fig. 5 is a schematic structural view of a refrigerating and freezing apparatus according to another embodiment of the present invention.
Detailed Description
Fig. 1 is a schematic block diagram of a refrigeration freezer 1 according to one embodiment of the invention. The refrigeration-freezing apparatus 1 may generally include a cabinet 20, an evaporator 35, a cold storage device 57, a processor 70, and a storage 80.
The cabinet 20 has a storage compartment 21 and a cooling compartment 25 formed therein. The storage compartment 21 forms a storage space therein for storing food materials, medicines, drinks and the like. The inside of the refrigerating chamber 25 forms a refrigerating space for storing cold sources such as an evaporator 35 and a cold storage device 57 described below. The refrigerating compartment 25 may communicate with the inner space of the storage compartment 21 through the supply air outlet 61 and the return air outlet 62.
The evaporator 35 is provided in the refrigerating compartment 25, and supplies cold to the storage compartment 21. Evaporator 35 is included as part of a refrigeration system. The refrigeration system of the refrigerating and freezing apparatus 1 may be a compression refrigeration system, and may further include a compressor 56, a condenser, a throttling device, and the like. The refrigerant evaporates while passing through the evaporator 35 to absorb heat, thereby performing a cooling function of the evaporator 35. A compressor 56 may be disposed within the press silo 24.
The cold accumulation device 57 is provided in the cooling chamber 25 and accumulates cold released from the evaporator 35, and for example, cold may be accumulated when the evaporator 35 supplies cold or immediately stops supplying cold. The evaporator 35, just after it has stopped supplying cold, is still at a low surface temperature and can deliver cold to the surrounding air. In some embodiments, the cold storage device 57 may be a PCM (phase change material) insulation board, and a board surface of the PCM insulation board facing the internal space of the refrigeration compartment 25 may be wrapped with an aluminum material. The evaporator 35 may be provided with PCM heat-insulating fins, and may also be used to accumulate the cold energy released by the evaporator 35, which is beneficial to increasing the cold accumulation area of the cold accumulation material, thereby increasing the overall cold accumulation capacity.
The refrigeration compartment 25 may be generally in the shape of a rectangular parallelepiped with an open top, and it may comprise a bottom wall 251 and a plurality of side walls 252. The bottom wall 251 may extend along a substantially horizontal plane. A plurality of side walls 252 respectively extend upward from the edges of the bottom wall 251 so as to define, together with the bottom wall 251, the refrigeration compartment 25 having an open top. The number of the sidewalls 252 may be four, and each of the sidewalls extends upward from the periphery of the bottom wall 251. The cold storage device 57 may form at least one side wall 252 of the refrigeration chamber 25, which is advantageous to reduce the volume of the refrigeration chamber 25 and improve the space utilization.
The refrigerator freezer 1 may further include a controllable damper 54 openably and closably disposed at the top opening to open or close the refrigeration compartment 25.
The refrigeration chamber 25 is closed in a controlled manner when the evaporator 35 stops supplying cold. For example, when the evaporator 35 stops supplying cold, the controllable damper 54 closes the top opening, so that the leakage of cold released by the evaporator 35 immediately after the supply of cold is stopped can be prevented, the cold accumulation device 57 continues to accumulate cold, and the dissipation of cold accumulated by the cold accumulation device 57 during the supply of cold to the evaporator 35 can also be prevented.
For another example, when it is desired to provide cooling energy using either one of the cold storage device 57 and the evaporator 35, the controllable damper 54 can open the top opening so that the cooling energy provided by the cold storage device 57 and the evaporator 35 can flow out of the cooling compartment 25 and into the storage compartment 21.
The processor 70 and the memory 80 may form a control device of the refrigerating and freezing device 1 and are disposed in the cabinet 20. The control device may be a main control board. Wherein the memory 80 stores a machine executable program 801, the machine executable program 801 being adapted to be executed by the processor 70 for implementing a method of controlling the refrigeration freezer 1 according to any of the following embodiments. The processor 70 may be a Central Processing Unit (CPU), or a digital processing unit (DSP), or the like. The memory 80 is used to store programs executed by the processor 70. The memory 80 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. The memory 80 may also be a combination of various memories. Since the machine executable program 801 when executed by the processor 70 implements each process of the method embodiments described below and can achieve the same technical effects, the details are not repeated herein for avoiding repetition.
Fig. 3 is a schematic diagram of a control method of the refrigerating and freezing apparatus 1 according to an embodiment of the present invention. The control method may generally include:
step S302, it is determined that the cooling compartment 25 is closed. Whether the refrigeration compartment 25 is closed can be determined indirectly, for example, by detecting the state or position of the controllable damper 54. When the controllable damper 54 closes the top opening of the refrigeration compartment 25, the refrigeration compartment 25 is closed.
Step S304, the temperature of the storage compartment 21 is detected. For example, a temperature sensor may be disposed in the storage compartment 21 for detecting the temperature of the storage compartment 21.
Step S306, determining whether the temperature of the storage compartment 21 exceeds a preset temperature threshold.
In step S308, if the temperature of the storage compartment 21 exceeds the preset temperature threshold, the refrigeration chamber 25 is opened to supply cold to the storage compartment 21 by using the cold energy accumulated in the cold accumulation device 57. For example, the controllable damper 54 may be controlled to open the top opening of the refrigeration compartment 25, thereby opening the refrigeration compartment 25.
With the above method, in the refrigeration and freezing device 1 of the present embodiment, since the cold accumulation device 57 is disposed in the refrigeration chamber 25, cold energy can be accumulated when the evaporator 35 supplies cold, the refrigeration chamber 25 is opened by monitoring the temperature of the storage compartment 21 and when the temperature of the storage compartment 21 exceeds the preset temperature threshold, and the refrigeration and freezing device 1 can supply cold to the storage compartment 21 by using the cold accumulated in the cold accumulation device 57, so that the temperature of the storage compartment 21 can be reduced without starting the evaporator 35.
Since the surface temperature of the evaporator 35 when the cooling is stopped is still low, a large amount of cold energy can be released to the ambient environment, the cold energy released by the evaporator 35 is accumulated by the cold accumulation device 57, and the cold accumulation device 57 is used to supply cold to the storage compartment 21 when the storage compartment 21 has a refrigeration demand, which is advantageous to improve the energy efficiency of the refrigeration and freezing device 1.
Before the step S302, for example, when a door opening and closing event occurs in the storage compartment 21 and the door body of the storage compartment 21 is closed, the evaporator 35 may be started to supply cold to the storage compartment 21, and after the temperature of the storage compartment 21 reaches the set temperature, the evaporator 35 may be stopped and switched to the cold supply stop state. At the same time when the evaporator 35 is stopped, the cooling compartment 25 may be closed, and the supply fan 53 of the embodiment described below may be stopped.
In step S306, the temperature threshold may be set according to the set temperature of the storage compartment 21 and the fresh-keeping requirement of the user, where the fresh-keeping requirement of the user is the upper limit value of the temperature variation range of the storage compartment 21 allowed by the user. The temperature threshold may be the sum of the set temperature and an upper limit of the temperature variation range. For example, if the set temperature of the storage chamber 21 is 2 ℃ and the upper limit value of the temperature variation range of the storage chamber 21 is 3 ℃, the temperature threshold value may be 5 ℃.
In some optional embodiments, if the temperature of the storage compartment 21 exceeds a preset temperature threshold, before opening the refrigeration compartment 25, the control method may further include: acquiring the cold accumulation amount of the cold accumulation device 57, wherein the cold accumulation amount is used for indicating the cold amount accumulated by the cold accumulation device 57 when the evaporator 35 supplies cold, and adjusting the working state of the evaporator 35 according to the cold accumulation amount of the cold accumulation device 57, wherein the working state comprises a cold supply state and a cold supply stop state.
For example, when the cold storage amount is small, the cold storage amount may not satisfy the refrigeration requirement of the storage compartment 21, and at this time, the evaporator 35 may be started and the evaporator 35 may be used to rapidly supplement the cold to the storage compartment 21. When the cold storage amount is large, the cold storage amount may already satisfy the refrigeration requirement of the storage compartment 21, and the evaporator 35 may not be started at this time. In some embodiments, the cold storage amount of the cold storage device 57 may be compared with a preset cold storage threshold value to determine how much cold storage amount is. For example, when the cold storage amount of the cold storage device 57 is greater than the cold threshold value, it indicates that the cold storage amount has satisfied the refrigeration requirement of the storage compartment 21, and when the cold storage amount of the cold storage device 57 is equal to or less than the cold threshold value, it indicates that the cold storage amount cannot satisfy the refrigeration requirement of the storage compartment 21. The threshold value for the cold quantity can be determined from the average single input of cold quantity when the evaporator 35 is used to supply cold to the storage compartment 21.
In some embodiments, the step of adjusting the cooling state of the evaporator 35 according to the cold storage amount of the cold storage device 57 may include: determining that the evaporator 35 is in a cold supply stopping state, acquiring target required cold quantity of the storage chamber 21, wherein the target required cold quantity is used for marking cold quantity required by the storage chamber 21, judging whether the cold storage quantity of the cold storage device 57 is greater than or equal to the target required cold quantity, and if not, starting the evaporator 35 to adjust the state from the cold supply stopping state to the cold supply state. If the cold storage amount of the cold storage device 57 is equal to or greater than the target required cold amount, the operating state of the evaporator 35 may not be adjusted, and the evaporator 35 may be kept in a cold supply stop state, for example. The target required cooling capacity may be the cooling capacity required for the temperature of the storage compartment 21 to return to the set temperature (i.e., to achieve the cooling demand).
Because the target demand cold quantity of the storage chamber 21 can reflect the current refrigeration demand of the storage chamber 21, the target demand cold quantity is real-time data, the cold accumulation amount of the cold accumulation device 57 is compared with the target demand cold quantity of the storage chamber 21, whether the evaporator 35 is started or not is determined according to the comparison result, whether the cold accumulation amount of the cold accumulation device 57 meets the refrigeration demand of the storage chamber 21 or not can be accurately judged, the reliability of the control process is improved, and the energy consumption can be saved while the refrigeration demand of the storage chamber 21 is met.
The step of acquiring the target required refrigeration capacity of the storage chamber 21 can comprise the following steps: and acquiring the set temperature of the storage chamber 21, and determining the target required refrigeration capacity according to the set temperature of the storage chamber 21. The set temperature of the storage compartment 21 may be a shutdown point temperature.
In the process of determining the target required refrigeration capacity according to the set temperature of the storage chamber 21, the difference between the temperature of the storage chamber 21 and the set temperature can be calculated, and the target required refrigeration capacity can be determined according to the difference. For example, in the process of determining the target required cooling capacity according to the difference, a plurality of preset difference ranges may be obtained, each difference range corresponds to one target required cooling capacity, and then the target required cooling capacity corresponding to the difference range to which the difference belongs is used as the target required cooling capacity of the storage compartment 21. The correspondence between each difference range and the target required cooling capacity can be determined according to the input cooling capacity required for the storage compartment 21 to reach the set temperature at different starting temperatures.
The step of obtaining the cold storage amount of the cold storage device 57 may include: a history of cooling history of the evaporator 35 is acquired, and the cold storage amount of the cold storage device 57 is calculated based on the history of cooling history of the evaporator 35. The history cold supply record indirectly reflects the cold storage rate of the cold storage device 57 when the evaporator 35 is supplied with cold. In this embodiment, the history cold supply record of the evaporator 35 records the cold supply parameters of the last cold supply of the evaporator 35, for example, the cold supply parameters may include the coil temperature and the cold supply time of the evaporator 35. The coil temperature of the evaporator 35 may refer to an average value of the coil temperature in the cooling process of the evaporator 35, and the cooling time duration may refer to the operation time duration from the start to the shutdown of the evaporator 35.
In some embodiments, the step of calculating the cold storage amount of the cold storage device 57 from the history of the cold supply history of the evaporator 35 may include: the cold accumulation rate of the cold accumulation device 57 is determined according to the coil temperature, and the cold accumulation amount of the cold accumulation device 57 is calculated according to the cold accumulation rate of the cold accumulation device 57 and the cold supply time of the evaporator 35. The cold storage rate is used to describe the amount of cold stored in the cold storage device 57 per unit time, i.e., how fast the cold storage device 57 stores the cold.
In the process of determining the cold accumulation rate of the cold accumulation device 57 according to the coil temperature of the evaporator 35, a preset rate correspondence table can be obtained, in which the correspondence between the coil temperature of the evaporator 35 and the cold accumulation rate of the cold accumulation device 57 is specified, and the cold accumulation rate of the cold accumulation device 57 corresponding to the coil temperature is determined according to the rate correspondence table. The rate mapping table can be determined according to the cold accumulation amount of the cold accumulation device 57 in the set time period at different coil temperatures and the length of the set time period.
By using the method, the cold accumulation amount of the cold accumulation device 57 is determined by utilizing the historical cold supply record of the evaporator 35, and whether to start the evaporator 35 is judged according to the cold accumulation amount, so that the method is simple and convenient and has high accuracy.
In some alternative embodiments, the refrigerating and freezing device 1 further has a supply air fan 53 disposed in the cooling compartment 25 or downstream of the cooling compartment 25 for promoting the formation of a supply air flow flowing from the cooling compartment 25 to the storage compartment 21, so that the cooling energy provided by the evaporator 35 or the cooling energy provided by the cold storage device 57 enters the storage compartment 21 with the supply air flow. Downstream of the refrigeration compartment 25 may refer to above the top opening of the refrigeration compartment 25.
While the cooling compartment 25 is opened, the control method may further include: the air supply fan 53 is started to make the cold energy in the refrigeration chamber 25 enter the storage compartment 21 along with the air supply flow.
By starting the air supply fan 53 while opening the refrigeration compartment 25, the efficiency of cold delivery can be accelerated by the air supply fan 53, which is advantageous for causing the storage compartment 21 to quickly recover the fresh-keeping atmosphere.
In some alternative embodiments, before the cooling chamber 25 is opened in step S308, it may not be determined whether the evaporator 35 needs to be started, and the cold storage device 57 may be directly used to supplement cold to the storage compartment 21. The operation time after the air supply fan 53 is started can be any value within the range of 20-60 min, for example, 30min, the air supply fan 53 can operate at a low rotating speed, so that the cold accumulation device 57 slowly releases cold, and the temperature rise rate of the storage compartment 21 is delayed. If the temperature of the storage compartment 21 does not reach the set temperature during the operation of the air supply fan 53, the evaporator 35 can be further started, and the rotation speed of the air supply fan 53 is increased, so that the calculation process of the cold accumulation amount and the target required cold amount can be omitted.
Fig. 4 is a control flowchart of the refrigerating and freezing apparatus 1 according to an embodiment of the present invention. The control flow may generally include the steps of:
step S402, it is determined that the cooling compartment 25 is closed.
In step S404, the temperature of the storage compartment 21 is detected.
Step S406, determining whether the temperature of the storage compartment 21 exceeds a preset temperature threshold, if yes, performing step S408, and if no, performing step S402.
In step S408, the history of cooling history of the evaporator 35 is acquired. The history cold supply record of the evaporator 35 records the cold supply parameters of the evaporator 35 during last cold supply, and the cold supply parameters include the coil temperature of the evaporator 35 and the length of the cold supply time.
Step S410, the cold accumulation rate of the cold accumulation device 57 is determined according to the temperature of the coil.
In step S412, the cold storage amount of the cold storage device 57 is calculated from the cold storage rate of the cold storage device 57 and the cold supply time period of the evaporator 35.
In step S414, it is determined that the evaporator 35 is in the cooling stop state.
In step S416, the set temperature of the storage compartment 21 is acquired.
Step S418 determines the target required cooling capacity according to the set temperature of the storage compartment 21. The target required cooling capacity is used to indicate the cooling capacity required by the storage compartment 21.
Step S420 is to determine whether the cold storage amount of the cold storage device 57 is greater than or equal to the target required cold amount, if so, step S422 is executed, and if not, step S424 is executed.
In step S422, the evaporator 35 is started to be adjusted from the cooling stop state to the cooling state.
Step S424 opens the refrigerating chamber 25 to supply cold to the storage compartment 21 using the cold energy accumulated in the cold accumulation device 57.
In step S426, the air supply fan 53 is started.
By using the method, the cold accumulation device 57 is arranged in the refrigerating chamber 25, so that cold energy can be accumulated when the evaporator 35 supplies cold, the refrigerating chamber 25 is opened when the temperature of the storage chamber 21 exceeds the preset temperature threshold value by monitoring the temperature of the storage chamber 21, and the refrigerating and freezing device 1 can supply cold to the storage chamber 21 by using the cold energy accumulated by the cold accumulation device 57, so that the temperature of the storage chamber 21 can be reduced without starting the evaporator 35.
Fig. 5 is a schematic configuration diagram of a refrigerating and freezing apparatus 1 according to another embodiment of the present invention. The refrigerating chamber 25 of the refrigerating and freezing device 1 of the present embodiment is provided at the rear side of the storage compartment 21. The refrigerating chambers 25 may be two and arranged in parallel front and back. The cooling compartment 25 of the above embodiment may be the first cooling compartment 25. The second cooling compartment 25 may be constructed identically to the first cooling compartment 25. The evaporator of the above embodiment, which may be named the first evaporator 35, is disposed in the first cooling compartment 25. In this embodiment, the refrigerating and freezing device 1 may further include a second evaporator 44 disposed in the second cooling chamber 25. The first evaporator 35 may be a temperature-varying evaporator for temperature-varying cooling, and the second evaporator 44 may be a cryogenic evaporator having a cryogenic function or a general freezing evaporator having a general cooling function.
The cold storage device 57 may be provided on a common side wall 252 of the first and second refrigeration chambers 25, 25. In some alternative embodiments, the cold storage device 57 may include a first cold storage portion facing the first refrigeration chamber 25 and configured to store the cold released by the first evaporator 35, and a second cold storage portion facing the second refrigeration chamber 25 and configured to store the cold released by the second evaporator 44. Each cold storage portion may be a PCM (phase change material) insulation board.
In this embodiment, the controllable damper 54 is also controlled to be openably and closably disposed at the top opening of the second cooling chamber 25, so as to open or close the second cooling chamber 25, and the cooling energy provided by the second evaporator 44 or the second cold storage part can be transmitted to the storage compartment 21. The first evaporator 35 and the second evaporator 44 may both be used to supply cold to the same storage compartment 21, for example, when the set temperature of the storage compartment 21 is in a temperature range corresponding to the first evaporator 35, the controllable damper 54 may open the first cooling compartment 25 and close the second cooling compartment 25, and when the set temperature of the storage compartment 21 is in a temperature range corresponding to the second evaporator 44, the controllable damper 54 may open the second cooling compartment 25 and close the first cooling compartment 25. In some optional embodiments, a second storage compartment 23 may be further formed in the box body 20, and the refrigerating and freezing device 1 may be further provided with a third evaporator 37 for supplying cold to the second storage compartment 23.
In some embodiments, a frame 58 may be provided at the top opening of the first and second refrigeration chambers 25, the frame 58 having a first outlet opening communicating with the first refrigeration chamber 25 and a second outlet opening communicating with the second refrigeration chamber 25. The controllable damper 54 is mounted to the frame 58 to open or close the first and second outlets, which makes the structural layout more rational and facilitates installation.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived 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 (10)
1. A control method of a cold storage and freezing device is provided with a storage chamber and a refrigeration chamber, wherein an evaporator used for supplying cold to the storage chamber and a cold accumulation device used for accumulating cold energy released by the evaporator are arranged in the refrigeration chamber; the refrigeration chamber is controllably closed when the evaporator stops supplying cold; and the control method includes:
determining that the refrigeration compartment is closed;
detecting the temperature of the storage chamber;
judging whether the temperature of the storage chamber exceeds a preset temperature threshold value or not;
if so, the refrigeration chamber is opened to supply cold to the storage compartment by utilizing the cold energy accumulated by the cold accumulation device.
2. The control method as claimed in claim 1, before opening said refrigeration compartment, further comprising:
acquiring the cold accumulation amount of the cold accumulation device, wherein the cold accumulation amount is used for marking the cold accumulated by the cold accumulation device when the evaporator supplies cold;
and adjusting the working state of the evaporator according to the cold accumulation amount of the cold accumulation device, wherein the working state comprises the cold supply state and the cold supply stop state.
3. The control method according to claim 2, wherein,
the step of adjusting the cooling state of the evaporator according to the cold storage amount of the cold storage device comprises the following steps:
determining that the evaporator is in a cooling stop state;
acquiring target required cooling capacity of the storage chamber, wherein the target required cooling capacity is used for marking the cooling capacity required by the storage chamber;
judging whether the cold accumulation amount of the cold accumulation device is greater than or equal to the target required cold amount;
if not, the evaporator is started to be adjusted from the cooling stop state to the cooling state.
4. The control method according to claim 3,
the step of acquiring the target required cold quantity of the storage chamber comprises the following steps:
acquiring the set temperature of the storage chamber;
and determining the target required cold quantity according to the set temperature of the storage chamber.
5. The control method according to claim 2, wherein,
the step of acquiring the cold storage amount of the cold storage device comprises the following steps:
acquiring a historical cooling record of the evaporator;
and calculating the cold accumulation amount of the cold accumulation device according to the historical cold supply record of the evaporator.
6. The control method according to claim 5, wherein,
in the step of obtaining the cold accumulation amount of the cold accumulation device, the historical cold supply record of the evaporator records the cold supply parameters of the evaporator during last cold supply, and the cold supply parameters comprise the coil temperature and the cold supply time length of the evaporator.
7. The control method according to claim 6,
the step of calculating the cold storage amount of the cold storage device according to the history cold supply record of the evaporator includes:
determining a cold storage rate of the cold storage device based on the coil temperature;
and calculating the cold accumulation amount of the cold accumulation device according to the cold accumulation rate of the cold accumulation device and the cold supply time of the evaporator.
8. The control method according to claim 1,
the refrigerating and freezing device is also provided with an air supply fan which is arranged in the refrigerating chamber or at the downstream of the refrigerating chamber and is used for promoting the formation of air supply flow flowing from the refrigerating chamber to the storage compartment; and while opening the refrigeration compartment, the control method further comprises:
and starting the air supply fan.
9. A refrigeration freezer apparatus comprising:
the refrigerator comprises a box body, a storage compartment and a refrigerating compartment, wherein the storage compartment and the refrigerating compartment are formed in the box body;
the evaporator is arranged in the refrigerating chamber and used for supplying cold to the storage chamber;
the cold accumulation device is arranged in the refrigerating chamber and is used for accumulating the cold energy released by the evaporator; and the refrigeration chamber is controllably closed when the evaporator stops supplying cold; and
a processor and a memory, the memory having stored therein a machine executable program, which when executed by the processor, is for implementing the control method of any one of claims 1-8.
10. The refrigerator-freezer of claim 9,
the refrigeration compartment includes:
a bottom wall;
a plurality of side walls respectively extending upwardly from edges of the bottom wall so as to enclose the refrigeration compartment with the bottom wall with an open top; the cold accumulation device forms at least one side wall of the refrigeration chamber; and is provided with
The refrigerating and freezing device further comprises a controllable air door which is controlled to be arranged at the top opening in an opening and closing mode, so that the refrigerating chamber is opened or closed.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110772581.0A CN115597281A (en) | 2021-07-08 | 2021-07-08 | Refrigerating and freezing device and control method thereof |
| PCT/CN2022/101180 WO2023279988A1 (en) | 2021-07-08 | 2022-06-24 | Refrigeration and freezing device and control method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110772581.0A CN115597281A (en) | 2021-07-08 | 2021-07-08 | Refrigerating and freezing device and control method thereof |
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| CN115597281A true CN115597281A (en) | 2023-01-13 |
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| CN202110772581.0A Pending CN115597281A (en) | 2021-07-08 | 2021-07-08 | Refrigerating and freezing device and control method thereof |
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| WO (1) | WO2023279988A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI477726B (en) * | 2012-01-20 | 2015-03-21 | Innovation Thru Energy Co Ltd | Mixed refrigerated cabinets |
| KR102152818B1 (en) * | 2013-11-18 | 2020-09-07 | 엘지전자 주식회사 | Refrigerator with cold storage medium |
| KR102236776B1 (en) * | 2014-09-05 | 2021-04-06 | 삼성전자주식회사 | An evaporator, an refrigerator using the evaporator and a method for controlling the refrigerator |
| CN105135783A (en) * | 2015-09-17 | 2015-12-09 | 青岛海尔股份有限公司 | Refrigeration container and control method thereof |
| MY190605A (en) * | 2015-10-06 | 2022-04-27 | Panasonic Ip Man Co Ltd | Cold storage apparatus and method of displaying state of cold storage element |
| CN106524647B (en) * | 2016-12-20 | 2019-05-03 | 青岛海尔股份有限公司 | A kind of control method of refrigerator |
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