CN114440518B - Refrigerator and control method thereof - Google Patents
Refrigerator and control method thereof Download PDFInfo
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- CN114440518B CN114440518B CN202011193681.XA CN202011193681A CN114440518B CN 114440518 B CN114440518 B CN 114440518B CN 202011193681 A CN202011193681 A CN 202011193681A CN 114440518 B CN114440518 B CN 114440518B
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- 238000005338 heat storage Methods 0.000 claims abstract description 239
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- 238000005057 refrigeration Methods 0.000 claims description 44
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- 238000011144 upstream manufacturing Methods 0.000 claims description 11
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- 238000010521 absorption reaction Methods 0.000 description 2
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- 235000014113 dietary fatty acids Nutrition 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
- F25D17/06—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
- F25D17/062—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation in household refrigerators
-
- 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
-
- 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 a storage compartment and an air duct communicated with the storage compartment are formed in the refrigerator, a plurality of heat storage devices are arranged in the air duct, each heat storage device is used for being controlled to be opened to exchange heat with air flow flowing through the air duct, and the control method comprises the following steps: acquiring a start-stop state of a refrigerating system for refrigerating the storage compartment; and adjusting the opening and closing states of the plurality of heat storage devices according to the starting and stopping states of the refrigerating system so as to adjust the temperature of the storage compartment by using the plurality of heat storage devices. The refrigerator can utilize the combination of the refrigerating system and the plurality of heat storage devices so as to jointly regulate the temperature of the storage compartment. According to the invention, by improving the temperature regulation method of the refrigerator, the temperature regulation process is optimized, the temperature control effect of the storage compartment is improved, and the intelligent degree of the refrigerator is improved.
Description
Technical Field
The invention relates to refrigeration technology, in particular to a refrigerator and a control method thereof.
Background
A refrigerator is a device capable of realizing low-temperature storage. In daily production and living of people, storage conditions of some articles are severe, when people store the articles in a storage compartment of a refrigerator, the temperature of the storage compartment needs to be strictly controlled, if the temperature of the air flow of the air supply is too low, the articles can be frozen or frostbitten, and if the temperature fluctuation of the storage compartment is large, the articles can be deteriorated.
In the prior art, part of refrigerators can only adjust the temperature of a storage compartment by adjusting the operation parameters of a refrigerating system, the adjusting process is complex, the temperature control effect is poor, and excessive energy consumption is easy to generate.
Therefore, how to improve the temperature adjusting method of the refrigerator is a technical problem to be solved by those skilled in the art.
Disclosure of Invention
An object of the present invention is to provide a refrigerator and a control method thereof that at least partially solve the above-mentioned problems.
A further object of the present invention is to improve the temperature regulation method of the refrigerator, optimize the regulation process and improve the temperature control effect.
It is still a further object of the present invention to improve the temperature regulating capability of the thermal storage device as a whole.
Another further object of the present invention is to reduce the power consumption of the refrigerator.
It is still a further object of the present invention to simplify the control logic of a refrigerator and improve the operating efficiency.
According to an aspect of the present invention, there is provided a control method of a refrigerator in which a storage compartment and an air duct communicating with the storage compartment are formed, a plurality of heat storage devices each for controlled opening to exchange heat with an air flow flowing through the air duct are provided in the air duct, and the control method includes: acquiring a start-stop state of a refrigerating system for refrigerating the storage compartment; and adjusting the opening and closing states of the plurality of heat storage devices according to the starting and stopping states of the refrigerating system so as to adjust the temperature of the storage compartment by using the plurality of heat storage devices.
Optionally, the start-stop state of the refrigeration system comprises a start-up state; the air duct is provided with an air outlet, the air duct conveys air supply air flow to the storage compartment through the air outlet, and the plurality of heat storage devices comprise a first heat storage device positioned at the upstream of the air outlet; and the step of adjusting the open/close state of the first heat storage device when the refrigeration system is in the activated state includes: acquiring the temperature of the air flow flowing through the air outlet; judging whether the temperature of the air flow flowing through the air outlet is lower than a preset first air outlet temperature threshold value; if yes, the first heat storage device is opened, so that heat is released to the air flow of the air supply flowing through the air outlet by the first heat storage device.
Optionally, an air supply fan for promoting the formation of air supply air flow is also arranged in the air duct; and under the condition that the temperature of the air flow flowing through the air outlet is lower than a preset first air outlet temperature threshold value, the control method further comprises the following steps: the running speed of the air supply fan is reduced.
Optionally, the step of adjusting the open-closed state of the first heat storage device after opening the first heat storage device further includes: acquiring the temperature of the air flow flowing through the air outlet; judging whether the temperature of the air flow flowing through the air outlet is higher than a preset second air outlet temperature threshold value, wherein the second air outlet temperature threshold value is larger than the first air outlet temperature threshold value; if so, the first heat storage device is turned off.
Optionally, the start-stop state of the refrigeration system comprises a shutdown state; the air duct is provided with an air return opening, and the return air flow flowing through the storage compartment flows into the air duct through the air return opening; the plurality of heat storage devices comprise a second heat storage device arranged close to the air return opening; and in the stopped state, the step of adjusting the open-closed state of the second heat storage device includes: acquiring the temperature of return air flow flowing through the return air inlet; judging whether the temperature of the return air flow flowing through the return air inlet is higher than a preset return air temperature threshold value; if yes, the second heat storage device is opened, so that the second heat storage device is utilized to absorb heat of the return air flow flowing through the return air inlet.
Optionally, the air duct is provided with an air outlet, the air duct conveys the air flow of the air supply to the storage compartment through the air outlet, and the plurality of heat storage devices comprise a first heat storage device positioned at the upstream of the air outlet; and the step of adjusting the open/close state of the first heat storage device after opening the second heat storage device includes: detecting a switching signal of the storage compartment to determine whether the storage compartment is opened; if the storage compartment is opened, the first heat storage device is opened to absorb heat of the air flow flowing through the air outlet by the first heat storage device.
Optionally, an air supply fan for promoting the formation of return air flow is also arranged in the air duct; when the refrigeration system is in the stopped state, before the step of adjusting the open-close state of the second heat storage device, the control method further includes: and controlling the air supply fan to run according to the preset minimum running speed.
According to another aspect of the present invention, there is also provided a refrigerator having an storage compartment formed therein and an air duct communicating with the storage compartment, further comprising: the heat storage devices are arranged in the air duct, and each heat storage device is used for being controlled to be opened so as to exchange heat with air flow flowing through the air duct; a processor and a memory, wherein the memory stores a control program, and the control program is used for realizing the control method according to any one of the above when being executed by the processor.
Optionally, the air duct is provided with an air outlet and an air return opening, the air duct conveys air supply airflow to the storage compartment through the air outlet, and return air airflow flowing through the storage compartment flows into the air duct through the air return opening; the air duct is also provided with a first concave cavity positioned at the upstream of the air outlet and a second concave cavity arranged close to the air return opening; the plurality of heat storage devices includes: the first heat storage device is arranged in the first concave cavity; the second heat storage device is arranged in the second concave cavity.
Optionally, each thermal storage device includes: a case body defining a heat storage chamber therein for accommodating a heat storage material; the cover body is arranged on the box body and used for being controlled to move so as to open the heat storage cavity, thereby allowing the air flow flowing through the heat storage device to exchange heat with the heat storage material; the driving mechanism is arranged on the box body and used for driving the cover body to move.
The refrigerator and the control method thereof are characterized in that a storage compartment and an air duct communicated with the storage compartment are formed in the refrigerator, a plurality of heat storage devices are arranged in the air duct, and each heat storage device is used for being controlled to be opened to exchange heat with air flow flowing through the air duct. The refrigerator can utilize the combination of the refrigerating system and the plurality of heat storage devices to jointly adjust the temperature of the storage compartment by acquiring the start-stop state of the refrigerating system for refrigerating the storage compartment and adjusting the opening and closing states of the plurality of heat storage devices according to the start-stop state of the refrigerating system. According to the invention, by improving the temperature regulation method of the refrigerator, the temperature regulation process is optimized, the temperature control effect of the storage compartment is improved, and the intelligent degree of the refrigerator is improved.
Further, the refrigerator and the control method thereof of the invention are characterized in that the plurality of heat storage devices are arranged in the air duct, and the opening and closing states of the plurality of heat storage devices are regulated according to the starting and stopping states of the refrigerating system, so that the plurality of heat storage devices can select the opening and closing states according to actual conditions, thereby being beneficial to improving the overall temperature regulating capability of the heat storage devices.
Further, the refrigerator and the control method thereof of the invention have the advantages that the plurality of heat storage devices comprise the first heat storage device and the second heat storage device, when the temperature of the air supply flow flowing through the air outlet is lower in the starting state of the refrigeration system, the first heat storage device is opened to release heat to the air supply flow flowing through the air outlet, so that part of cold in the air supply flow can be temporarily stored in the first heat storage device, and when the temperature of the air return flow flowing through the air return opening is higher in the stopping state of the refrigeration system, the second heat storage device is opened to absorb heat of the air return flow flowing through the air return opening. By using the method, the refrigerator can reduce energy consumption.
Furthermore, the refrigerator and the control method thereof can pertinently adjust the opening and closing states of the plurality of heat storage devices only according to the starting and stopping states of the refrigerating system, which is beneficial to simplifying the control logic of the refrigerator and improving the operation efficiency.
The above, as well as additional objectives, advantages, and features of the present invention will become apparent to those skilled in the art from the following detailed description of a specific embodiment of the present invention when read in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter by way of example and not by way of limitation with reference to the accompanying drawings. The same reference numbers will be used throughout the drawings to refer to the same or like parts or portions. It will be appreciated by those skilled in the art that the drawings are not necessarily drawn to scale. In the accompanying drawings:
fig. 1 is a schematic block diagram of a refrigerator according to an embodiment of the present invention;
fig. 2 is a schematic view of an air duct cover plate of a refrigerator according to an embodiment of the present invention;
FIG. 3 is another schematic view of an air duct cover plate of a refrigerator according to one embodiment of the present invention;
fig. 4 is a schematic view of a heat storage device of a refrigerator according to an embodiment of the present invention;
fig. 5 is another schematic view of a heat storage device of the refrigerator shown in fig. 4;
Fig. 6 is a schematic view of another view of the heat storage device of the refrigerator shown in fig. 5;
fig. 7 is a schematic view of a case and a driving mechanism of a heat storage device of the refrigerator shown in fig. 6;
fig. 8 is a schematic view of a cover of a heat storage device of the refrigerator shown in fig. 6;
fig. 9 is a schematic view of a control method of a refrigerator according to an embodiment of the present invention;
fig. 10 is a control flow diagram of a refrigerator according to an embodiment of the present invention;
fig. 11 is another control flow diagram of a refrigerator according to an embodiment of the present invention.
Detailed Description
Fig. 1 is a schematic block diagram of a refrigerator 10 according to one embodiment of the present invention. The refrigerator 10 may generally include a cabinet, a plurality of thermal storage devices 200 disposed within the cabinet, a refrigeration system, a processor 130, and a memory 140.
The refrigerator 10 may be of the direct-cooled type, the air-cooled type, or any other type. The following embodiments will be described in detail with reference to the air-cooled refrigerator 10 as an example, and the refrigerator 10 and its control method should be fully capable of expanding on other types of refrigerators 10 based on the knowledge of those skilled in the art, and are not illustrated herein.
The refrigeration system may be a compression refrigeration system. The refrigeration system may include a compressor, a condenser, a throttling device, and an evaporator. When the refrigerating system is in a starting state, under the action of the compressor, the refrigerant is subjected to exothermic condensation when flowing through the condenser, and is subjected to endothermic evaporation when flowing through the evaporator. The refrigeration system can utilize the refrigerant to absorb heat in the evaporator to generate phase change so as to cool the storage compartment. In some embodiments, the refrigeration system may also be provided with solenoid valves for regulating the flow direction, flow rate, and/or flow velocity of the refrigerant.
The interior of the box body can be provided with a storage compartment and an air duct communicated with the storage compartment. The number and the temperature area of the storage compartments can be set arbitrarily according to actual needs. In this embodiment, the storage compartment may be one storage compartment, and the storage compartment may be a refrigerating compartment.
The air duct is provided with an air outlet and an air return opening 120, and the air duct conveys air supply air flow to the storage compartment through the air outlet, and the air return air flow flowing through the storage compartment flows into the air duct through the air return opening 120. That is, the air duct is communicated with the storage compartment through the air outlet and the return air inlet 120, respectively. The positions and the number of the air outlets and the air return openings 120 can be set according to actual needs. Since the method for setting the air outlet and the air return 120 is well known to those skilled in the art, the detailed description is omitted herein.
The refrigerator 10 of the present embodiment may further include an air supply fan disposed in the air duct for promoting the formation of the supply air flow and the return air flow. The blower fan may be disposed within the machine room 150 shown in fig. 2. The flow channel 160 shown in fig. 2 illustrates the flow area of the supply air flow. The air outlet may be provided in the air flow channel 160. The air duct conveys air supply airflow to the storage compartment through the air outlet. The supply air flow may refer to a heat exchange air flow through the evaporator. The heat exchange air flow is reduced in temperature by heat exchange with the evaporator as it passes through the evaporator. The air supply fan is also used for promoting the return air flow flowing through the storage compartment to flow into the air duct and then return to the evaporator, so that air flow circulation is formed. The operation speed of the blower fan may be preset with a plurality of shift positions, and may include, for example, a preset minimum operation speed, a maximum operation speed, and a middle-shift operation speed between the minimum operation speed and the maximum operation speed.
In some further embodiments, an air duct cover 100 may be further disposed in the case and disposed at the rear side of the storage compartment. Wherein the "rear side" is with respect to the actual use state of the refrigerator 10. The air outlet and the air return opening 120 can be formed on the air duct cover plate 100. Fig. 2 is a schematic view of the air duct cover 100 of the refrigerator 10 according to one embodiment of the present invention, and fig. 3 is another schematic view of the air duct cover 100 of the refrigerator 10 according to one embodiment of the present invention. Fig. 2 shows a schematic view of the side of the air duct cover 100 facing away from the storage compartment, and fig. 3 shows a schematic view of the side of the air duct cover 100 facing toward the storage compartment.
The duct is also formed with a first cavity 130 upstream of the air outlet, and a second cavity 140 disposed adjacent to the air return 120. The first and second cavities 130 and 140 may be each formed to be recessed from an inner wall surface of the duct toward an outside of the duct in a thickness direction of the duct. The first and second cavities 130 and 140 may generally define a receiving space in the shape of a rectangular parallelepiped. In this embodiment, "upstream" with respect to the flow path of the supply air flow, the first cavity 130 is located upstream of the air outlet, which means that the supply air flow flows through the first cavity 130 and then through the air outlet. The second cavity 140 may be disposed above the return air opening 120. The first cavity 130 and the second cavity 140 may be formed on the duct cover 100.
The plurality of heat storage devices may include a first heat storage device and a second heat storage device. The first thermal storage device may be disposed within the first cavity 130. The second thermal storage device may be disposed within the second cavity 140. That is, the first heat storage device may be located upstream of the air outlet. The second thermal storage device may be disposed near the return air opening 120.
In this embodiment, the number of air outlets may be two, and accordingly, the number of first cavities 130 may be two, and each first cavity 130 may be respectively corresponding to one air outlet, and the number of first heat storage devices may be two and respectively disposed in one first cavity 130. The number of the air return openings 120 may be one, and the number of the second cavities 140 and the number of the second heat storage devices may be one.
The volume of the first cavity 130 may be slightly larger than the volume of the first heat storage device, and the volume of the second cavity 140 may be slightly larger than the volume of the second heat storage device, so that enough installation space and opening and closing space are reserved for the heat storage device 200, so that the heat storage device 200 can be opened and closed, and interference phenomenon in the opening and closing process of the heat storage device 200 is reduced or avoided. When the thermal storage device 200 is mounted to the first and second cavities 130 and 140, the depth of placement of the thermal storage device 200 ensures that the reciprocating movement of the cover 220 of the thermal storage device 200 is not interfered with, while also ensuring that the thermal storage device 200 does not block the air passage.
Fig. 4 is a schematic view of a thermal storage device 200 of the refrigerator 10 according to one embodiment of the present invention. Fig. 4 is a schematic view of the thermal storage device 200 in the closed state. Fig. 5 is another schematic view of the heat storage device 200 of the refrigerator 10 shown in fig. 4. Fig. 5 is a schematic view of the thermal storage device 200 in an open state.
Each thermal storage device 200 may include a cartridge 210, a cap 220, and a drive mechanism 230. Therein, the interior of the cartridge body 210 defines a thermal storage chamber 215 for containing a thermal storage material. The case 210 may have a substantially rectangular parallelepiped shape having an opening. The cover 220 is provided on the case 210 for controlled movement to open the heat storage chamber 215, thereby allowing the air flow through the heat storage device 200 to exchange heat with the heat storage material. The cover 220 may be disposed at an opening of the case 210 to close the heat storage chamber 215.
The present embodiment controls the movement of the lid 220 to open and close the thermal storage device 200. The open/closed state of the heat storage device 200 is actually the open/closed state of the heat storage chamber 215, and the open/closed state of the heat storage device 200 determines whether or not the heat storage material can exchange heat with the air flow flowing through. When the cover 220 completely shields the opening of the case 210, the heat storage chamber 215 is in a closed state, the heat storage device 200 is in a closed state, and the heat storage material cannot exchange heat with the air flow passing therethrough. When the cover 220 is controlled to move to open the opening of the case 210, the heat storage chamber 215 is in an open state, the heat storage device 200 is in an open state, and the heat storage material can exchange heat with the air flow passing therethrough.
When the cover 220 is controlled to move to open the heat storage chamber 215, the heat storage material within the heat storage chamber 215 may contact the air flow flowing through the heat storage device 200 through the opening, thereby achieving heat exchange. The driving mechanism 230 may be disposed on the case 210 for driving the cover 220 to move. The direction of the arrow in fig. 5 shows the direction of movement of the cover 220. The driving mechanism 230 may drive the cover 220 to reciprocate in the arrow direction shown in fig. 2 to open or close the heat accumulation chamber 215.
Fig. 6 is a schematic view of another view of the heat storage device 200 of the refrigerator 10 shown in fig. 5.
In this embodiment, the driving mechanism 230 may be disposed on the case 210 for driving the cover 220 to move. The drive mechanism 230 may include a motor 231 and a transmission 232. The motor 231 may be provided on a sidewall of the case 210, for example, on sidewalls located at both lateral sides of the case 210. The transmission 232 may be a gear (e.g., a spur gear) in driving connection with the output shaft of the motor 231. The cover 220 is formed with a rack 225 engaged with the gear, respectively. The motor 231 drives the transmission member 232 to rotate through the output shaft, thereby indirectly driving the cover 220 to move.
In this embodiment, the driving mechanisms 230 may be two and symmetrically disposed on two sidewalls of the case 210. Accordingly, two racks 225 may be correspondingly formed on the cover 220, and each rack 225 may be engaged with one of the driving mechanisms 230.
Fig. 7 is a schematic view of the case 210 and the driving mechanism 230 of the heat storage device 200 of the refrigerator 10 shown in fig. 6. The portion of the case 210 contacting the cover 220 may be formed with a groove. The number of grooves may be three, as shown in fig. 7, a first groove 211, a second groove 212, and a third groove 213, respectively. A permanent magnet may be disposed within each groove.
Fig. 8 is a schematic view of the cover 220 of the heat storage device 200 of the refrigerator 10 shown in fig. 6. The cover 220 may be provided with a magneto-sensitive element at a portion contacting the case 210. The number of the magneto-sensitive elements may be three, as shown in fig. 8, namely a first element 221, a second element 222 and a third element 223. In the process that the cover 220 moves in the arrow direction shown in fig. 4 to open the heat storage chamber 215, when the cover 220 moves to a position to completely open the heat storage chamber 215, the moving distance of the cover 220 reaches a maximum value, at which time the first member 221 contacts the permanent magnet positioned in the first groove 211 and the second member 222 contacts the permanent magnet positioned in the second groove 212, and the refrigerator 10 may emit a signal for indicating that the motor 231 stops operating. When the heat storage chamber 215 needs to be closed, the motor 231 can drive the cover 220 to move reversely. In the process that the cover 220 is moved in the reverse direction of the arrow shown in fig. 4 to close the heat storage chamber 215, when the cover 220 is moved to a position to completely close the heat storage chamber 215, the cover 220 is restored to the original position, and at this time, the third member 223 is in contact with the permanent magnet positioned in the third groove 213, and the refrigerator 10 may emit a signal for indicating that the motor 231 is stopped.
The cover 220 and the case 210 may be made of a thermal insulation material. When the thermal storage device 200 is closed, the thermal storage material does not exchange heat with the air flow outside the thermal storage device 200.
The heat storage material of the present embodiment is a solid material. The type of the heat storage material may be selected according to the actual temperature variation range of the storage compartment, and for example, the heat storage material may be one or more of fatty acids, high molecular compounds, polyols, layered perovskite, and the like. The heat storage material remains solid throughout heat exchange (heat absorption and/or heat release) with the flowing air stream, which can reduce or avoid corrosion of the case due to leakage of the heat storage material.
The heat storage material has a phase transition temperature, and when the temperature of the air flow flowing through the heat storage material is lower than the phase transition temperature of the heat storage material, the heat storage material can release the heat absorbed by the heat storage material, so that the heating of the air flow flowing through the heat storage material is realized; when the temperature of the air flow flowing through the heat storage material is higher than the phase transition temperature of the heat storage material, the heat storage material can absorb the heat of the air flow flowing through the heat storage material, so that the temperature of the air flow can be properly reduced, and the temperature regulation function is realized. The phase transition temperature of the heat storage material is determined by the type of material, and it is noted that the term "phase transition" herein does not mean that the actual morphology of the heat storage material changes, and when the heat storage material changes phase, the phase transition is always maintained in a solid state, but the characteristic parameters of the heat storage material at microscopic level such as the interval between molecules inside the heat storage material change.
The phase transition temperature of the thermal storage material inside the first thermal storage device may be the same as or different from the phase transition temperature of the thermal storage material inside the second thermal storage device. In this embodiment, the phase transition temperatures of the heat storage materials inside the first heat storage device and the second heat storage device may each be any value in the range of-3 to 0 ℃.
The processor 330 and the memory 340 may form a control device, which may be disposed within the housing. In which a control program 341 is stored in the memory 340, the control program 341 is used to implement the control method of the refrigerator 10 of any one of the following embodiments when executed by the processor 330. The processor 330 may be a Central Processing Unit (CPU), or a digital processing unit (DSP), or the like. The memory 340 is used to store programs executed by the processor 330. Memory 340 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 340 may also be a combination of various memories 340. Since the control program 341 implements the processes of the following method embodiments when executed by the processor 330, and the same technical effects can be achieved, the description is omitted here for avoiding repetition.
Fig. 9 is a schematic view of a control method of the refrigerator 10 according to an embodiment of the present invention. The control method may generally include:
step S902, acquiring a start-stop state of a refrigeration system for refrigerating the storage compartment. The start-stop state of the refrigeration system may include a start-up state and a shut-down state.
In the starting state, the refrigerating system can prepare cold energy for the storage compartment. The refrigerant is subjected to endothermic evaporation while flowing through the evaporator, so that the temperature of the evaporator is lowered. Under the action of the air supply fan, the air supply air flow flowing through the evaporator and exchanging heat with the evaporator can convey cold energy to the storage compartment through the air outlet of the air duct. When the refrigeration system is in a stop state, the refrigeration system does not prepare cold for the storage compartment. In this embodiment, when the refrigeration system enters the start-up state, the air supply fan may be started up synchronously. When the refrigerating system enters a stop state, the air supply fan can continue to operate.
In step S904, the open/close states of the plurality of heat storage devices 200 are adjusted according to the on/off states of the refrigeration system, so that the temperatures of the storage compartments are adjusted by the plurality of heat storage devices 200.
When the heat storage device 200 is in the open state, the heat storage material inside the heat storage device 200 can exchange heat with the air flow flowing through the heat storage device 200, for example, when the temperature of the air flow flowing through the heat storage device 200 is low, the heat storage material inside the heat storage device 200 releases the heat absorbed before to the air flow flowing through the heat storage device 200, and when the temperature of the air flow flowing through the heat storage device 200 is high, the heat storage material inside the heat storage device 200 can absorb the heat of the air flow flowing through the heat storage device 200, thereby reducing the air flow temperature by utilizing the heat absorption effect.
Using the above-described method, the refrigerator 10 of the present embodiment can use a combination of the refrigeration system and the plurality of heat storage devices 200 to collectively adjust the temperature of the storage compartments. The temperature regulation method of the refrigerator 10 is improved, so that the temperature regulation process is optimized, the temperature control effect of the storage compartment is improved, and the energy consumption of the refrigerator 10 is reduced.
By arranging the plurality of heat storage devices 200 in the air duct and adjusting the open/close states of the plurality of heat storage devices 200 according to the on/off states of the refrigeration system, the plurality of heat storage devices 200 can be made to select the open/close states according to actual conditions, thereby being beneficial to improving the overall temperature adjustment capability of the heat storage devices 200.
The plurality of thermal storage devices 200 may include a first thermal storage device located upstream of the air outlet. When the refrigerating system is in a starting state, the temperature of the air flow is lower, sometimes even the temperature reaches below 0 ℃, the temperature of the air flow directly influences the temperature of the storage compartment, and the too low temperature of the air flow directly leads to frostbite of articles in the storage compartment, which are close to the air outlet, and is especially unfavorable for storing articles with higher water content. In this embodiment, in view of the above, the temperature of the supply air flow can be appropriately reduced by the heat release action of the first heat storage device.
In the above step S904, when the refrigeration system is in the activated state, the step of adjusting the open/close state of the first heat storage device may include: and acquiring the temperature of the air flow flowing through the air outlet, judging whether the temperature of the air flow flowing through the air outlet is lower than a preset first air outlet temperature threshold value, and if so, opening the first heat storage device to release heat to the air flow flowing through the air outlet by using the first heat storage device. At this time, the heat storage material in the first heat storage device releases the latent heat of phase change by performing forced convection heat exchange with the air flow of the air supply, so that the temperature of the air flow of the air supply flowing through the air outlet is increased. In this embodiment, the refrigerator 10 may be provided with an outlet air temperature sensor for detecting the temperature of the supplied air flowing through the outlet air, and disposed at the outlet air.
The first exhaust temperature threshold may be set according to a phase transition temperature of the heat storage material inside the first heat storage device, for example, may be equal to or less than the phase transition temperature of the heat storage material inside the first heat storage device. In some embodiments, the difference between the first outlet air temperature threshold and the phase transition temperature of the thermal storage material inside the first thermal storage device may be between 0-2 ℃. In this embodiment, the phase transition temperature of the heat storage material inside the first heat storage device may be any value in the range of-3 to 0 ℃. The first outlet air temperature threshold value can be any value within the range of-3 to 0 ℃.
In this embodiment, the first air outlet temperature threshold is set according to the phase change temperature of the heat storage material in the first heat storage device, and when the temperature of the air flow flowing through the air outlet is lower than the first air outlet temperature threshold, the temperature of the air flow is also lower than the phase change temperature of the heat storage material in the first heat storage device, so that the temperature of the air flow does not need to be compared with the phase change temperature of the heat storage material.
A compartment temperature sensor for detecting the temperature of the storage compartment may be provided in the refrigerator 10, and the compartment temperature sensor may be provided in the storage compartment. In this embodiment, the triggering condition for starting the refrigeration system may be that the temperature of the intermediate temperature sensor is greater than the starting point temperature corresponding to the preset gear. The preset gear may refer to a compartment temperature gear preset by a user, and each preset gear corresponds to a respective shutdown point temperature and startup point temperature. When the refrigerating system is in a starting state, if the temperature detected by the intermediate temperature sensor is reduced to be less than or equal to the shutdown point temperature corresponding to the preset gear, the refrigerating system can be controlled to be switched to a shutdown state, for example, the compressor can be controlled to stop running, or the electromagnetic valve is controlled to switch the passage.
When the refrigeration system is in a starting state, under the condition that the temperature of the air flow of the air supply flowing through the air outlet is lower than a preset first air outlet temperature threshold value, the control method can further comprise: the running speed of the air supply fan is reduced. Under the condition that the temperature of the air flow flowing through the air outlet is lower, the cooling capacity of the storage compartment can be reduced by reducing the running speed of the air supply fan, so that articles close to the air outlet are prevented from being directly blown by the cold air with lower temperature for a long time. In this embodiment, the operation speed of the air blowing fan may be reduced before the first heat storage device is turned on, for example, the operation speed of the air blowing fan may be reduced by one shift.
In other alternative embodiments, if the first air outlet temperature threshold is less than 0 ℃, the operation speed of the air blower may be reduced when the temperature of the air flow flowing through the air outlet is less than 0 ℃.
After opening the first heat storage device, the step of adjusting the open-closed state of the first heat storage device may further include: and acquiring the temperature of the air flow flowing through the air outlet, judging whether the temperature of the air flow flowing through the air outlet is higher than a preset second air outlet temperature threshold value, wherein the second air outlet temperature threshold value is greater than the first air outlet temperature threshold value, and if so, closing the first heat storage device. The second outlet air temperature threshold may be any value in the range of 0 to 1 ℃, for example, may be 0.5 ℃. When the temperature of the air flow flowing through the air outlet is higher than a preset second air outlet temperature threshold value, the air flow flowing through the air outlet is proper in temperature, and the articles stored in the storage compartment are not frozen or frostbitten, and the first heat storage device is closed at the moment.
The plurality of thermal storage devices 200 may include a second thermal storage device disposed proximate the return air opening 120. The second heat storage device may be turned on simultaneously with the first heat storage device or turned off simultaneously when the refrigeration system is in the on state. When the first heat storage device and the second heat storage device are simultaneously opened, the sudden temperature drop or sudden rise of the storage compartment can be reduced or avoided, the storage compartment is facilitated to maintain a good temperature condition, and the fresh-keeping effect is improved; next, the heat storage device 200 releases the heat absorbed previously, and balances the temperature of the heat storage material to maintain the heat absorbing and releasing capacities of the heat storage device 200 to the maximum extent.
When the refrigerating system is in a stop state, the refrigerating system does not provide cold for the storage compartment any more, and the temperature of the storage compartment can be increased by heat release of articles in the storage compartment, heat leakage of a door seal, opening of a door by a user to take and put the articles, and the like, so that the temperature of the storage compartment fluctuates, and the articles (such as fresh foods) stored in the storage compartment can be deteriorated. In this embodiment, in view of the above, the temperature of the storage compartment can be appropriately reduced by utilizing the endothermic effect of the second heat storage device and/or the first heat storage device.
In the above step S904, when the refrigeration system is in the stopped state, the step of adjusting the open/close state of the second heat storage device may include: and acquiring the temperature of the return air flow flowing through the return air inlet 120, judging whether the temperature of the return air flow is higher than a preset return air temperature threshold value, and if so, opening the second heat storage device to absorb the heat of the return air flow flowing through the return air inlet 120 by using the second heat storage device. The return air temperature threshold may be set in accordance with the phase transition temperature of the thermal storage material inside the second thermal storage device. The return air temperature threshold value is greater than the phase change temperature of the heat storage material inside the second heat storage device, and the difference between the return air temperature threshold value and the phase change temperature of the heat storage material inside the second heat storage device may be any value in the range of 0 to 5 ℃, for example, may be 5 ℃. In this embodiment, the refrigerator 10 may be provided with a return air temperature sensor for detecting a temperature of a return air flow flowing through the return air inlet 120, and disposed at the return air inlet 120.
When the refrigeration system is in the stopped state, before the step of adjusting the open-close state of the second heat storage device, the control method further includes: and controlling the air supply fan to run according to the preset minimum running speed. In this embodiment, when the refrigeration system is switched from the start-up state to the stop state, the air blower may continue to operate at the preset minimum operation speed, for example, the refrigerator 10 may use the air blower to cause the formed air flow to circulate to perform the defrosting step.
After the step of controlling the blower fan to operate at the preset minimum operation speed, the control method may further include: the temperature of the evaporator is detected, and the step of adjusting the open-close state of the second heat storage device is performed in the case where the temperature of the evaporator is higher than a preset defrosting temperature threshold. In this embodiment, the refrigerator 10 may further include a defrosting sensor provided on the evaporator for detecting the temperature of the evaporator. In the event that the temperature of the evaporator is above a preset defrost temperature threshold, it is indicated that the refrigerator 10 may exit the defrost step. If the temperature of the evaporator is not higher than the preset defrosting temperature threshold, the air supply fan can be controlled to continuously operate according to the preset minimum operation speed, and the temperature of the evaporator is continuously detected.
In the step of adjusting the open/close state of the second heat storage device, if the temperature of the return air flow flowing through the return air inlet 120 is not higher than the preset return air temperature threshold value, the second heat storage device may not be turned on. If the temperature of the return air flow flowing through the return air inlet 120 is higher than the preset return air temperature threshold, the air supply fan can be controlled to continue to operate at the preset minimum operation speed when the second heat storage device is turned on.
When the refrigerating system is in a stop state, if a user opens the storage compartment, the cold in the storage compartment is lost, and the temperature in the storage compartment is directly increased. In view of this problem, in the present embodiment, the temperature of the storage compartment can be adjusted by both the first heat storage device and the second heat storage device.
After opening the second heat storage device, the step of adjusting the open/close state of the first heat storage device includes: and detecting a switching signal of the storage compartment to determine whether the storage compartment is opened, and if the storage compartment is opened, opening the first heat storage device to absorb heat of air flow flowing through the air outlet by using the first heat storage device. When the storage compartment is opened, air inside the storage compartment may exchange gas with air outside the refrigerator 10. When the first heat storage device is opened, the air supply fan can be controlled to continue to operate at the preset minimum operation speed.
After the storage compartment is closed, a determination may be made as to whether the refrigerator 10 requires a refrigeration system to be activated. For example, the control method may further include: and acquiring the temperature of the room temperature sensor, and controlling the refrigeration system to be switched into a starting state under the condition that the temperature of the room temperature sensor is higher than the starting point temperature corresponding to the preset gear. When the refrigeration system is switched to the on state, the heat storage apparatus 200 that was previously opened may be turned off. After the refrigerating system is switched to a starting state, the air supply fan can be controlled to operate according to a preset highest operation speed. After the storage compartment is closed, if the temperature of the compartment temperature sensor is between the starting point temperature and the shutdown point temperature corresponding to the preset gear, the running speed of the air supply fan can be increased, for example, the running speed of the air supply fan can be increased by one gear; if the temperature of the intermediate temperature sensor is not higher than the temperature of the shutdown point corresponding to the preset gear, the shutdown of the air supply fan can be controlled.
With the above method, the refrigerator 10 of the present embodiment can purposefully adjust the open/close states of the plurality of heat storage devices 200 according to the start/stop states of the refrigeration system, which is beneficial to simplifying the control logic of the refrigerator 10 and improving the operation efficiency.
In other alternative embodiments, when the temperature of the storage compartment needs to be adjusted by the first heat storage device and the second heat storage device, the heat exchange areas of the first heat storage device and the second heat storage device may also be adjusted according to the temperature adjustment requirement. For example, when the refrigeration system is in the activated state, the step of adjusting the open-closed state of the first heat storage device may include: and acquiring the temperature of the air flow flowing through the air outlet, judging whether the temperature of the air flow flowing through the air outlet is lower than a preset first air outlet temperature threshold value, if so, acquiring the difference value between the temperature of the air flow flowing through the air outlet and the first air outlet temperature threshold value, determining the heat exchange area of the first heat storage device according to the difference value, and controlling the first heat storage device to be opened according to the heat exchange area. When the first heat storage device is controlled to be opened according to the heat exchange area, the movement distance of the cover 220 may be determined according to the heat exchange area, and then the movement of the cover 220 may be controlled according to the determined movement distance.
With the above method, the refrigerator 10 of the present embodiment can improve the temperature adjustment accuracy of the heat storage device 200, which is beneficial to further improving the temperature control performance of the storage compartment.
The refrigerator 10 of this embodiment, on the basis that does not change original wind channel structure and air door part, through add a plurality of heat accumulation device in the wind channel, rely on the refrigerating system of refrigerator 10 and heat accumulation device 200 to mutually support, design to the running process of refrigerating system under the different states of opening and stopping, and user switch door action etc. has realized the regulation to the temperature of storing room, can guarantee that cold wind of air outlet does not frostbite article, has also reduced the temperature rise of storing room, has guaranteed storage quality. The heat storage material can be repeatedly used for many times, and can absorb and release heat as long as the phase change condition is achieved, so that the heat storage material is energy-saving and environment-friendly and has high cost performance.
Fig. 10 is a control flow chart of the refrigerator 10 according to one embodiment of the present invention.
Step S1002, determining that the refrigeration system is in a start-up state.
Step S1004, acquiring the temperature of the compartment temperature sensor. The temperature of the compartment temperature sensor refers to the temperature of the storage compartment detected by the compartment temperature sensor.
Step S1006, judging whether the temperature detected by the intermediate temperature sensor is greater than the shutdown point temperature corresponding to the preset gear, if yes, executing step S1008, and if not, executing step S1022.
In step S1008, the temperature of the supply air flow flowing through the air outlet is obtained.
Step S1010, determining whether the temperature of the supply air flow is lower than a preset first outlet temperature threshold, if yes, executing step S1012, otherwise, executing step S1008.
Step S1012, reducing the operation speed of the blower fan.
Step S1014, the first heat storage device is turned on.
In step S1016, the temperature of the supply air flow flowing through the air outlet is obtained.
Step S1018, determining whether the temperature of the supply air flow is higher than a preset second outlet air temperature threshold, if yes, executing step S1020, and if not, executing step S1016.
Step S1008, the first heat storage device is turned off.
Step S1008, the refrigeration system is controlled to switch to the shutdown state.
Fig. 11 is another control flow diagram of the refrigerator 10 according to one embodiment of the present invention.
In step S1102, it is determined that the refrigeration system is in a start-up state.
Step S1104, controlling the air supply fan to operate according to the preset minimum operation speed.
In step S1106, the temperature of the evaporator is detected.
Step S1108, determining whether the temperature of the evaporator is greater than a preset defrosting temperature threshold, if yes, executing step S1110, otherwise, executing step S1106.
In step S1110, the temperature of the return air flow flowing through the return air inlet 120 is obtained.
Step S1112, determine whether the temperature of the return air flow is higher than a preset return air temperature threshold, if yes, go to step S1114, and if no, go to step S1106.
Step S1114, the second thermal storage device is turned on.
Step S1116, detecting an opening/closing signal of the storage compartment.
In step S1118, when it is determined that the storage compartment is opened, the first heat storage device is opened.
In step S1120, when it is determined that the storage compartment is closed, the temperature of the compartment temperature sensor is acquired. The temperature of the compartment temperature sensor refers to the temperature of the storage compartment detected by the compartment temperature sensor.
Step S1122, determining whether the temperature of the intermediate temperature sensor is higher than the start-up point temperature corresponding to the preset gear, if yes, executing step S1130, and if no, executing step S1124.
Step S1124, judging whether the temperature of the intermediate temperature sensor is lower than the shutdown point temperature corresponding to the preset gear, if yes, executing step S1128, and if not, executing step S1126.
Step S1126, the operation speed of the blower fan is increased.
In step S1130, the refrigeration system is controlled to be switched to the on state, and the heat storage apparatus 200 is turned off.
Step S1132, controlling the air supply fan to operate according to the preset highest operation speed.
With the above-described method, the refrigerator 10 of the present embodiment enables the refrigerator 10 of the present embodiment to use the combination of the refrigeration system and the plurality of heat storage devices 200 to collectively adjust the temperature of the storage compartments by acquiring the on-off state of the refrigeration system for refrigerating the storage compartments and adjusting the open-close state of the plurality of heat storage devices 200 according to the on-off state of the refrigeration system. The temperature regulation method of the refrigerator 10 is improved, so that the temperature regulation process is optimized, the temperature control effect of the storage compartment is improved, and the intelligent degree of the refrigerator 10 is improved.
By now it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been shown and described herein in detail, many other variations or modifications of the invention consistent with the principles of the invention may be directly ascertained or inferred from the present disclosure without departing from the spirit and scope of the invention. Accordingly, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.
Claims (9)
1. A control method of a refrigerator in which a storage compartment and an air duct communicating with the storage compartment are formed, a plurality of heat storage devices each for controlled opening to exchange heat with an air flow flowing through the air duct are provided in the air duct, and the control method comprises:
acquiring a start-stop state of a refrigerating system for refrigerating the storage compartment;
the opening and closing states of the plurality of heat storage devices are adjusted according to the starting and stopping states of the refrigerating system, so that the temperature of the storage compartment is adjusted by the plurality of heat storage devices;
the start-stop state of the refrigeration system comprises a start-up state; the air duct is provided with an air outlet, the air duct conveys air supply air flow to the storage compartment through the air outlet, and the plurality of heat storage devices comprise a first heat storage device positioned at the upstream of the air outlet; and is also provided with
The step of adjusting the open-closed state of the first heat storage device when the refrigeration system is in the activated state includes:
acquiring the temperature of the air flow flowing through the air outlet;
judging whether the temperature of the air flow flowing through the air outlet is lower than a preset first air outlet temperature threshold value;
If yes, the first heat storage device is opened, so that heat is released to the air flow flowing through the air outlet by the first heat storage device.
2. The control method according to claim 1, wherein
The air duct is internally provided with an air supply fan for promoting the formation of the air supply air flow; and is also provided with
In the case that the temperature of the air flow flowing through the air outlet is lower than a preset first air outlet temperature threshold value, the control method further includes: and reducing the running speed of the air supply fan.
3. The control method according to claim 1, wherein
After opening the first heat storage device, the step of adjusting the open-closed state of the first heat storage device further includes:
acquiring the temperature of the air flow flowing through the air outlet;
judging whether the temperature of the air flow flowing through the air outlet is higher than a preset second air outlet temperature threshold value or not, wherein the second air outlet temperature threshold value is larger than the first air outlet temperature threshold value;
if yes, closing the first heat storage device.
4. The control method according to claim 1, wherein
The start-stop state of the refrigeration system comprises a stop state; the air duct is provided with an air return opening, and the return air flow flowing through the storage compartment flows into the air duct through the air return opening; the plurality of heat storage devices comprise a second heat storage device arranged close to the return air inlet; and is also provided with
In the stopped state, the step of adjusting the open-closed state of the second heat storage device includes:
acquiring the temperature of return air flow flowing through the return air inlet;
judging whether the temperature of the return air flow flowing through the return air inlet is higher than a preset return air temperature threshold value;
if yes, the second heat storage device is opened, so that the second heat storage device is utilized to absorb heat of return air flow flowing through the return air inlet.
5. The control method according to claim 4, wherein
The air duct is provided with an air outlet, the air duct conveys air supply air flow to the storage compartment through the air outlet, and the plurality of heat storage devices comprise a first heat storage device positioned at the upstream of the air outlet; and is also provided with
After opening the second heat storage device, the step of adjusting the open-closed state of the first heat storage device includes:
detecting a switching signal of the storage compartment to determine whether the storage compartment is opened;
and if the storage compartment is opened, opening the first heat storage device to absorb heat of the air flow flowing through the air outlet by using the first heat storage device.
6. The control method according to claim 4, wherein
The air duct is internally provided with an air supply fan for promoting the formation of the return air flow;
The control method further includes, when the refrigeration system is in a stopped state, before the step of adjusting the open-closed state of the second heat storage device:
and controlling the air supply fan to run according to a preset minimum running speed.
7. A refrigerator, in which a storage compartment and an air duct communicating with the storage compartment are formed, further comprising:
the heat storage devices are arranged in the air duct, and each heat storage device is used for being controlled to be opened so as to exchange heat with air flow flowing through the air duct;
a processor and a memory, in which a control program is stored which, when executed by the processor, is adapted to carry out the control method according to any one of claims 1-6.
8. The refrigerator of claim 7, wherein
The air duct is provided with an air outlet and an air return opening, the air duct conveys air supply airflow to the storage compartment through the air outlet, and the air return airflow flowing through the storage compartment flows into the air duct through the air return opening; the air duct is also provided with a first concave cavity positioned at the upstream of the air outlet and a second concave cavity arranged close to the air return opening;
the plurality of thermal storage devices includes:
The first heat storage device is arranged in the first concave cavity;
the second heat storage device is arranged in the second concave cavity.
9. The refrigerator of claim 8, wherein
Each of the thermal storage devices includes:
a case body defining a heat storage chamber therein for accommodating a heat storage material;
a cover body provided on the case body for controlled movement to open the heat storage chamber, thereby allowing the flow of air flowing through the heat storage device to exchange heat with the heat storage material;
the driving mechanism is arranged on the box body and used for driving the cover body to move.
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