CN111879056B - Refrigerator defrosting control method and device, storage medium and refrigerator - Google Patents
Refrigerator defrosting control method and device, storage medium and refrigerator Download PDFInfo
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- CN111879056B CN111879056B CN202010529151.1A CN202010529151A CN111879056B CN 111879056 B CN111879056 B CN 111879056B CN 202010529151 A CN202010529151 A CN 202010529151A CN 111879056 B CN111879056 B CN 111879056B
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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
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/002—Defroster control
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2600/00—Control issues
- F25D2600/02—Timing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2600/00—Control issues
- F25D2600/06—Controlling according to a predetermined profile
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- Defrosting Systems (AREA)
Abstract
The invention provides a refrigerator defrosting control method, a device, a storage medium and a refrigerator, wherein the method comprises the following steps: before defrosting the refrigerator, controlling the refrigerator to enter a preset refrigeration mode so as to refrigerate a freezing chamber of the refrigerator; after the time for entering the preset refrigeration mode reaches a first preset time, other compartments of the refrigerator are not refrigerated; and controlling a defrosting heater of the refrigerator to work to defrost after the time of entering the preset refrigeration mode reaches a second preset time. The scheme provided by the invention can ensure that the temperature rise of the freezing chamber does not exceed the threshold value of the temperature rise requirement of the freezing chamber when the refrigerator is defrosted.
Description
Technical Field
The invention relates to the field of control, in particular to a refrigerator defrosting control method and device, a storage medium and a refrigerator.
Background
The air-cooled refrigerator has the characteristics of quick refrigeration and good temperature uniformity, and the air-cooled refrigerator in the market is large in proportion at present. The air-cooled refrigerator needs a defrosting heater to automatically defrost, the defrosting heater works in the defrosting process, heat can be introduced into a freezing chamber due to the radiation of heat and the influence of natural convection, and the temperature of the originally low temperature of the freezing chamber rises. At present, national standards and international standards both provide requirements for temperature rise of a freezing chamber in a defrosting process, and the temperature rise of the freezing chamber is required to be not more than a certain threshold, for example, the national standards require that the temperature rise is not more than 3K. In order to ensure that the temperature rise of the freezing chamber does not exceed the temperature rise threshold of the freezing chamber, refrigerator designers control from different angles, and the method comprises the following steps: structurally preventing natural convection of heat; the radiation prevention is well done on the heat insulation and preservation; the better refrigerating device is designed, the frosting of the evaporator is reduced, the defrosting time is shortened, and the temperature is prevented from rising too much. These methods require modifications from structural or refrigeration components, are costly, and waste resources.
Disclosure of Invention
The invention mainly aims to overcome the defects of the prior art and provides a refrigerator defrosting control method, a device, a storage medium and a refrigerator, so as to solve the problem that in the prior art, in order to ensure that the temperature of a freezing chamber rises back to meet the requirement, the cost is high due to improvement on a structure or a refrigerating device.
The invention provides a refrigerator defrosting control method on one hand, which comprises the following steps: before defrosting the refrigerator, controlling the refrigerator to enter a preset refrigeration mode; after the time of entering the preset refrigeration mode reaches a first preset time or the temperature of other compartments except the freezing compartment is reduced to the corresponding shutdown point temperature, other compartments except the freezing compartment of the refrigerator are not refrigerated; and after the time of entering the preset refrigeration mode reaches a second preset time or the temperature of the freezing chamber is reduced to the temperature of the corresponding stop point, controlling the refrigerator to exit the preset refrigeration mode, and controlling a defrosting heater of the refrigerator to work so as to defrost.
Optionally, the refrigerator is not refrigerated in other compartments except for the freezing compartment, and the method comprises the following steps: and raising the starting point temperature of the other chambers to a preset temperature, closing the air doors of the other chambers and/or closing the air return openings of the other chambers.
Optionally, before the time of entering the preset cooling mode reaches a first preset time, the stop point temperature of other compartments of the refrigerator except the freezing compartment is lower than that in the normal operation mode.
Optionally, the first preset time is equal to one half of the second preset time.
In another aspect, the present invention provides a defrosting control apparatus for a refrigerator, including: the first control unit is used for controlling the refrigerator to enter a preset refrigeration mode before defrosting the refrigerator; the second control unit is used for enabling other compartments except the freezing compartment of the refrigerator not to be refrigerated after the time for entering the preset refrigeration mode reaches first preset time or the temperature of other compartments except the freezing compartment is reduced to the corresponding shutdown point temperature; and the third control unit is used for controlling the refrigerator to exit the preset refrigeration mode and controlling a defrosting heater of the refrigerator to work to defrost after the time of entering the preset refrigeration mode reaches a second preset time or the temperature of the freezing chamber is reduced to the temperature of a corresponding stop point.
Optionally, the second control unit, which causes the other compartments of the refrigerator except the freezing compartment not to be cooled, includes: and raising the starting point temperature of the other chambers to a preset temperature, closing the air doors of the other chambers and/or closing the air return openings of the other chambers.
Optionally, before the time of entering the preset cooling mode reaches a first preset time, the stop point temperature of other compartments of the refrigerator except the freezing compartment is lower than that in the normal operation mode.
Optionally, the first preset time is equal to one half of the second preset time.
A further aspect of the invention provides a storage medium having stored thereon a computer program which, when executed by a processor, carries out the steps of any of the methods described above.
Yet another aspect of the present invention provides a refrigerator comprising a processor, a memory, and a computer program stored on the memory and operable on the processor, the processor implementing the steps of any of the methods described above when executing the program.
The invention further provides a refrigerator which comprises the defrosting control device of the refrigerator.
According to the technical scheme of the invention, the freezing chamber is refrigerated before defrosting, so that the temperature rise of the freezing chamber does not exceed the temperature rise threshold of the freezing chamber during defrosting of the refrigerator, and the consistency of the temperature rise of the freezing chamber during testing during batch production of the refrigerator can be ensured, thereby greatly reducing the cost required by modification from structures or refrigeration devices, ensuring the consistency and ensuring that the design does not need to leave large allowance.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram illustrating a defrosting control method for a refrigerator according to an embodiment of the present invention;
FIG. 2 is a graph showing the temperature change of the refrigerating chamber and the freezing chamber during the cooling and defrosting of the refrigerator according to the present invention;
FIG. 3 is a graph illustrating the temperature change of the refrigerating compartment and the freezing compartment in case of refrigerating only the freezing compartment during the latter half of the intensive cooling according to an embodiment of the present invention;
FIG. 4 is a graphical illustration of the temperature change of the fresh food compartment and freezer compartment after the cold compartment shutdown point has been adjusted during the first half of the forced cool period in accordance with one embodiment of the present invention;
FIG. 5 is a schematic diagram illustrating a defrosting control method for a refrigerator according to an embodiment of the present invention;
fig. 6 is a block diagram illustrating an embodiment of a defrosting control apparatus for a refrigerator according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Fig. 1 is a method schematic diagram of an embodiment of a refrigerator defrosting control method provided by the invention. The defrosting control method is suitable for the air-cooled refrigerator.
As shown in fig. 1, according to an embodiment of the present invention, the refrigerator defrosting control method includes at least step S110, step S120, and step S130.
And step S110, before defrosting the refrigerator, controlling the refrigerator to enter a preset refrigeration mode.
Specifically, during the operation of the refrigerator, if it is determined that defrosting is required, the refrigerator is controlled to operate in a preset refrigeration mode before defrosting. And in the preset refrigeration mode, the refrigerating starting point temperature of the freezing chamber is lower than the starting point temperature in the normal operation mode. The normal operation mode is specifically a normal operation mode of the refrigerator. The preset refrigeration mode is, for example, a strong cooling mode, the stop point temperature of the refrigeration of the freezing chamber in the strong cooling mode is lower than the stop point temperature in the normal operation mode, for example, the stop point temperature of the refrigeration of the freezing chamber in the strong cooling mode is 4-5 ℃ lower than the stop point temperature of the refrigeration of the freezing chamber in the normal operation mode, the refrigerator is controlled to operate in the strong cooling mode before defrosting, and the temperature of the freezing chamber is reduced.
And step S120, after the time for entering the preset refrigeration mode reaches a first preset time or the temperature of other compartments except the freezing compartment is reduced to the corresponding shutdown point temperature, not refrigerating the other compartments except the freezing compartment of the refrigerator.
In one embodiment, after the time for entering the preset refrigeration mode reaches a first preset time, other compartments of the refrigerator except for the freezing compartment are not refrigerated. Preferably, the first preset time is equal to one half of the refrigerating time of the preset refrigerating mode. That is, the cooling time of the preset cooling mode is divided into a first half time and a second half time. For example, if the preset cooling mode is a strong cooling mode, the first preset time is half of the cooling time of the strong cooling mode, that is, the cooling time of the strong cooling mode is divided into a first half time and a second half time. The other compartments except the freezing compartment may be, specifically, a refrigerating compartment.
Fig. 2 is a graph showing temperature change curves of the refrigerating chamber and the freezing chamber during the cooling and defrosting of the refrigerator according to the present invention. As shown in fig. 2, taking the forced cooling mode as an example, a curve 1 is a temperature change curve of the refrigerating chamber, a curve 2 is a temperature change curve of the freezing chamber, 3 is a compressor power during cooling, and 4 is a power during defrosting of the defrosting heater. According to the variation curve of the temperature of the freezing chamber, in the latter half period of the forced cooling mode, if the refrigerating chamber is refrigerated, the temperature of the freezing chamber is slowly reduced, so that the temperature rising starting point of the freezing chamber after the freezing chamber enters a defrosting period is high, the temperature after defrosting is reduced in a specified time and then is compared with the temperature before the forced cooling mode, the temperature rising requirement (temperature threshold value) of the freezing chamber can be exceeded, in order to reduce cost and facilitate production and manufacture, most of air-cooled refrigerators adopt a single system, namely an evaporator, cold air is blown out from the freezing evaporator during refrigerating of the refrigerating chamber, hot air (generally 0-10 ℃) of the refrigerating chamber is returned to the evaporator, so that the evaporation temperature can rise, the freezing chamber is also blown out from the evaporator for refrigerating, but the temperature of the freezing chamber is generally below-18 ℃, so that the temperature of the freezing chamber is slowly reduced or has the phenomenon of rising when the refrigerating chamber is refrigerated, therefore, after the first preset time, the refrigerating chamber is not cooled.
Specifically, the starting point temperature of the other chambers is raised to a preset temperature, the air doors of the other chambers are closed, and/or the return air inlets of the other chambers are closed, so that the other chambers are not cooled. For example, the refrigerating chamber is not cooled by raising the temperature of the starting point of the refrigerating chamber or closing the air inlet of the refrigerating chamber in the latter half of the operation of the strong cooling mode, or the refrigerating chamber is not cooled by closing the air inlet of the refrigerating chamber in the latter half of the operation of the strong cooling mode. The starting point temperature may specifically be a temperature at which the compartment starts to refrigerate, and specifically may include a temperature at which a compressor is turned on to refrigerate, or a temperature at which a fan and a damper are turned on to refrigerate. For example, the refrigerating chamber needs to be refrigerated, a fan and a damper can be started to introduce cold air on an evaporator into the refrigerating chamber for refrigeration, the compressor is controlled to be started and stopped according to the temperature of the refrigerating chamber in general, the temperature of the evaporator is reduced after the compressor is started, and the cold air on the evaporator is introduced into the chambers for refrigeration by starting the fan and the damper in other chamber refrigeration. The compressor can also be controlled to start and stop if the other compartments are set at a low temperature.
Fig. 3 is a graph illustrating the temperature change of the refrigerating chamber and the freezing chamber in a case where only the freezing chamber is refrigerated during the latter half of the intensive cooling according to an embodiment of the present invention. As shown in fig. 3, a curve 11 is a temperature change curve of the refrigerating compartment, a curve 12 is a temperature change curve of the freezing compartment, 3 is a compressor power during cooling, and 4 is a power during defrosting of the defrosting heater. During the refrigeration and defrosting of the refrigerator, the refrigerating chamber is not refrigerated in the second half of the strong cooling, only the freezing chamber is refrigerated independently, and compared with the case that the refrigerating chamber is also refrigerated as shown in fig. 2 (refer to curve 1 and curve 2 in fig. 3), the temperature of the freezing chamber is reduced more, and the starting point of temperature rise after entering the defrosting period is lower. After defrosting, the temperature rising rate is the same, the highest point temperature of temperature rising is lower, the temperature falling in the set time is relatively lower, and the temperature is not easy to exceed the temperature rising requirement of the freezing chamber compared with the temperature before forced cooling.
In another embodiment, after the other compartments are cooled to the corresponding stop point temperature, the other compartments of the refrigerator except the freezing compartment are not cooled. The temperature of other compartments except the freezing compartment is reduced to the corresponding stop point temperature, and the temperature rise can be met under the condition of no refrigeration during defrosting. The other compartments except the freezing compartment can be a refrigerating compartment, the temperature of the refrigerating compartment is detected after the preset refrigeration mode is entered, whether the temperature is reduced to the stop point temperature corresponding to the refrigerating compartment is judged, and the refrigerating compartment is not refrigerated after the temperature reduced to the stop point temperature of the refrigerating compartment is detected. After the forced cooling mode is operated for a certain time, if the refrigerating chamber is refrigerated, the temperature of the refrigerating chamber is slowly reduced, so that the temperature rising starting point of the refrigerating chamber after the refrigerating chamber enters a defrosting period is high, and the temperature after defrosting is reduced in a specified time and compared with the temperature before the forced cooling mode is operated, the temperature rising starting point of the refrigerating chamber is possibly exceeded, so that the refrigerating chamber is not refrigerated after the temperature of the refrigerating chamber is reduced to the corresponding stop point temperature.
The method for preventing the other compartments of the refrigerator except for the freezing compartment from refrigerating may specifically include raising the starting point temperature of the other compartments to a preset temperature, closing the air doors of the other compartments, and/or closing the air return openings of the other compartments, which is the same as the foregoing embodiment, and reference may be made to the foregoing specific embodiment, which is not repeated herein.
And step S130, after the time for entering the preset refrigeration mode reaches a second preset time or the temperature of the freezing chamber is reduced to the corresponding stop point temperature, controlling the refrigerator to exit the preset refrigeration mode, and controlling a defrosting heater of the refrigerator to work so as to defrost.
In a specific embodiment, after the time for entering the preset refrigeration mode reaches a second preset time, the refrigerator is controlled to exit the preset refrigeration mode, and a defrosting heater of the refrigerator is controlled to work to defrost. The refrigeration time of the preset refrigeration mode is equal to a second preset time, namely the refrigeration time of the preset refrigeration mode is divided into two stages, wherein the period of time from entering the preset refrigeration mode to the first preset time is one stage, and the period of time from the first preset time to the second preset time is the other stage of strong cooling. Preferably, the first preset time is equal to half of the second preset time, that is, the refrigerating time in the strong cooling mode is divided into a first half time and a second half time. And when the time for entering the preset refrigeration mode reaches a second preset time, the refrigerator exits from the preset refrigeration mode, namely after the refrigeration time of the preset refrigeration mode is finished, the defrosting heater of the refrigerator is controlled to work to defrost.
In another specific embodiment, after the temperature of the freezing chamber is reduced to the corresponding shutdown point temperature, the refrigerator is controlled to exit the preset refrigeration mode, and a defrosting heater of the refrigerator is controlled to work to defrost. That is, after the temperature of the other compartments except the freezing compartment reaches the corresponding stop point temperature, the temperature of the freezing compartment is detected, and when the temperature of the freezing compartment is reduced to the stop point temperature of the freezing compartment, the refrigerator is controlled to exit the preset refrigeration mode and defrost.
Optionally, before the defrosting heater of the refrigerator is controlled to work, return air defrosting is carried out, namely hot air (generally 2-10 ℃) in the refrigerating chamber returns to the evaporator (generally-20 ℃ to-30 ℃) to defrost the evaporator, and after the return air defrosting is finished, the defrosting heater is controlled to work to defrost.
Preferably, in the preset refrigeration mode, before the time of entering the preset refrigeration mode reaches a first preset time or before the temperature of the freezing chamber is reduced to the corresponding stop point temperature, the stop point temperature of the other compartments of the refrigerator except the freezing chamber is lower than the stop point temperature in the normal operation mode. For example 1-3 deg.c lower than the shutdown temperature in the normal operation mode. The normal operation mode is specifically a normal operation mode of the refrigerator. For example, the system operates according to the start-up temperature and the stop-point temperature of the compartment refrigeration which meet the national standards. For example, in the normal operation mode, the temperature of the refrigerating chamber at the stop point for refrigerating is 3 ℃, and then in the first preset time of entering the preset refrigerating mode, when the detected temperature is lower than 2 ℃, the refrigerating chamber is stopped (the air door is closed) and does not refrigerate.
Specifically, in order to compensate for the fact that the refrigerating chamber is not refrigerated after the time of entering the preset refrigerating mode reaches the first preset time, and the temperature of the refrigerating chamber rises back to a high level during defrosting, the shutdown point temperature of other compartments of the refrigerator except the freezing chamber is lower than the shutdown point temperature in the normal operation mode before the time of entering the preset refrigerating mode reaches the first preset time or before the temperature of the freezing chamber is reduced to the corresponding shutdown point temperature. For example, during the first half of the strong cooling, the other compartments are refrigerated when the other compartments may have refrigeration requirements, and the temperature of the shutdown points of the other compartments is reduced by a little relative to the temperature of the shutdown points in the non-strong cooling mode, for example, by 1 ℃ to 3 ℃, so that the temperature of the other compartments can be raised to meet the requirement under the condition that the other compartments except the freezing compartment are not refrigerated during the second half of the strong cooling and are not refrigerated during the defrosting period. Before the freezing chamber temperature is reduced to the corresponding stop point temperature, the stop point temperature of other compartments except the freezing chamber of the refrigerator is lower than that in the normal operation mode, so that the temperatures of the compartments except the freezing chamber can be cooled more quickly.
Fig. 4 is a graph illustrating a temperature change curve of the refrigerating compartment and the freezing compartment after a refrigerating compartment stop point is adjusted down during a first half of a strong cooling period according to an embodiment of the present invention. As shown in fig. 4, a curve 21 is a refrigerating compartment temperature change curve, a curve 22 is a freezing compartment temperature change curve, 3 is a compressor power during cooling, and 4 is a defrosting power during defrosting by a defrosting heater. Still taking the forced cooling mode as an example, as shown in fig. 4, in the first half of the forced cooling, the down-regulation control is performed on the temperature of the stop point of the refrigerating chamber, that is, the temperature of the stop point of the refrigerating chamber in the first half of the forced cooling is lower than that of the stop point of the refrigerating chamber in the normal operation mode, so that the temperature of the refrigerating chamber does not rise too high during the second half of the forced cooling and the defrosting.
The refrigerating chamber refrigeration has great influence on the temperature of the freezing chamber, most of the refrigerating chambers of the air-cooled refrigerators are refrigerated by pumping cold air from the freezing chamber, for example, the temperature of the refrigerating chamber is generally 5 ℃, the temperature of the freezing chamber is generally-18 ℃, return air is hot air above 0 ℃ when the refrigerating air is pumped, the temperature of an evaporator rises, the temperature of the freezing chamber drops, the speed is greatly reduced, and the temperature of the freezing chamber rises after defrosting.
According to the embodiment of the invention, the refrigerating chamber is not refrigerated in the latter half period of strong cooling, the temperature of the refrigerating chamber is lower than that of the refrigerating chamber which is raised in a normal condition, so that the required time for refrigeration is shorter after defrosting is finished, as shown in fig. 2, 5 is the compressor power for refrigeration after defrosting under the condition that the refrigerating chamber is not limited to be refrigerated in the latter half period of strong cooling, as shown in fig. 3 and 4, 6 is the compressor power for defrosting under the condition that the refrigerating chamber is not refrigerated in the latter half period of strong cooling, and when the refrigerating chamber is not refrigerated in the latter half period of strong cooling, the temperature of the refrigerating chamber is raised in a defrosting state, the energy required for pulling back the temperature is less, the refrigerating time is reduced, so that the refrigerating time is shortened, and the refrigerating chamber is shut down in advance; in the case where the control is uniform before defrosting, the consumed electric power is relatively small.
In order to clearly illustrate the technical solution of the present invention, an implementation flow of the refrigerator defrosting control method provided by the present invention is described below with an embodiment.
Fig. 5 is a schematic method diagram of a defrosting control method for a refrigerator according to an embodiment of the present invention. As shown in fig. 5, when the refrigerator is operated, whether defrosting is needed or not is determined, if defrosting is needed, the refrigerator is controlled to enter a forced cooling mode, a freezing chamber is refrigerated, after the forced cooling time reaches half, the refrigerating chamber is not refrigerated, only the freezing chamber is refrigerated, after the forced cooling time is over, return air defrosting is performed, hot air (generally 2-10 ℃) in the refrigerating chamber returns to an evaporator (generally-20 ℃ to-30 ℃) to defrost the evaporator, when return air defrosting is performed, a fan and an air door are closed (if the fan and the air door are not closed, hot air enters a space for storing food in the refrigerating chamber and the freezing chamber, stored food is deteriorated), a defrosting heater starts to operate to defrost, after defrosting is over, water is treated, and precooling is performed to enter a refrigeration cycle.
Fig. 6 is a block diagram illustrating an embodiment of a defrosting control apparatus for a refrigerator according to the present invention. The defrosting control method is suitable for the air-cooled refrigerator.
As shown in fig. 6, the refrigerator defrosting control apparatus 100 includes a first control unit 110, a second control unit 120, and a third control unit 130.
The first control unit 110 is configured to control the refrigerator to enter a preset refrigeration mode to refrigerate a freezing chamber of the refrigerator before defrosting the refrigerator.
Specifically, during the operation of the refrigerator, if it is determined that defrosting is required, the refrigerator is controlled to operate in a preset refrigeration mode before defrosting. And in the preset refrigeration mode, the refrigerating starting point temperature of the freezing chamber is lower than the starting point temperature in the normal operation mode. The normal operation mode is specifically a normal operation mode of the refrigerator. The preset refrigeration mode is, for example, a strong cooling mode, the stop point temperature of the freezing chamber refrigeration in the strong cooling mode is lower than the stop point temperature in the normal operation mode, for example, the stop point temperature of the freezing chamber refrigeration in the strong cooling mode is lower than the stop point temperature of the freezing chamber refrigeration in the normal operation mode by 4 to 5 ℃, and the first control unit 110 controls the refrigerator to operate the strong cooling mode before defrosting, so as to lower the temperature of the freezing chamber.
The second control unit 120 is configured to enable the other compartments of the refrigerator except the freezing compartment not to be refrigerated after the time of entering the preset refrigeration mode reaches the first preset time or after the temperature of the other compartments except the freezing compartment is reduced to the corresponding shutdown temperature.
In one embodiment, after the time of entering the preset cooling mode reaches a first preset time, the second control unit 120 does not cool the compartments of the refrigerator except for the freezing compartment. Preferably, the first preset time is equal to one half of the refrigerating time of the preset refrigerating mode. That is, the cooling time of the preset cooling mode is divided into a first half time and a second half time. For example, if the preset cooling mode is a strong cooling mode, the first preset time is half of the cooling time of the strong cooling mode, that is, the cooling time of the strong cooling mode is divided into a first half time and a second half time. The other compartments except the freezing compartment may be, specifically, a refrigerating compartment.
Fig. 2 is a graph showing the temperature change of the refrigerating chamber and the freezing chamber during the cooling and defrosting of the refrigerator according to the present invention. As shown in fig. 2, taking the forced cooling mode as an example, a curve 1 is a temperature change curve of the refrigerating chamber, a curve 2 is a temperature change curve of the freezing chamber, 3 is a compressor power during cooling, and 4 is a power during defrosting of the defrosting heater. According to the variation curve of the temperature of the freezing chamber, in the latter half period of the forced cooling mode, if the refrigerating chamber is refrigerated, the temperature of the freezing chamber is slowly reduced, so that the temperature rising starting point of the freezing chamber after the freezing chamber enters a defrosting period is high, the temperature after defrosting is reduced in a specified time and then is compared with the temperature before the forced cooling mode, the temperature rising requirement (temperature threshold value) of the freezing chamber can be exceeded, in order to reduce cost and facilitate production and manufacture, most of air-cooled refrigerators adopt a single system, namely an evaporator, cold air is blown out from the freezing evaporator during refrigerating of the refrigerating chamber, hot air (generally 0-10 ℃) of the refrigerating chamber is returned to the evaporator, so that the evaporation temperature can rise, the freezing chamber is also blown out from the evaporator for refrigerating, but the temperature of the freezing chamber is generally below-18 ℃, so that the temperature of the freezing chamber is slowly reduced or has the phenomenon of rising when the refrigerating chamber is refrigerated, therefore, after the first preset time, the refrigerating chamber is not cooled.
Specifically, the second control unit 120 raises the starting point temperature of the other compartments to a preset temperature, closes the dampers of the other compartments, and/or closes the return air inlets of the other compartments, so that the other compartments do not perform cooling. For example, the refrigerating chamber is not cooled by raising the temperature of the starting point of the refrigerating chamber or closing the air inlet of the refrigerating chamber in the latter half of the operation of the strong cooling mode, or the refrigerating chamber is not cooled by closing the air inlet of the refrigerating chamber in the latter half of the operation of the strong cooling mode. The starting point temperature may specifically be a temperature at which the compartment starts to refrigerate, and specifically may include a temperature at which a compressor is turned on to refrigerate, or a temperature at which a fan and a damper are turned on to refrigerate. For example, the refrigerating chamber needs to be refrigerated, a fan and a damper can be started to introduce cold air on an evaporator into the refrigerating chamber for refrigeration, the compressor is controlled to be started and stopped according to the temperature of the refrigerating chamber in general, the temperature of the evaporator is reduced after the compressor is started, and the cold air on the evaporator is introduced into the chambers for refrigeration by starting the fan and the damper in other chamber refrigeration. The compressor can also be controlled to start and stop if the other compartments are set at a low temperature.
Fig. 3 is a graph illustrating the temperature change of the refrigerating chamber and the freezing chamber in a case where only the freezing chamber is refrigerated during the latter half of the intensive cooling according to an embodiment of the present invention. As shown in fig. 3, a curve 11 is a temperature change curve of the refrigerating compartment, a curve 12 is a temperature change curve of the freezing compartment, 3 is a compressor power during cooling, and 4 is a power during defrosting of the defrosting heater. During the refrigeration and defrosting of the refrigerator, the refrigerating chamber is not refrigerated in the second half of the strong cooling, only the freezing chamber is refrigerated independently, and compared with the case that the refrigerating chamber is also refrigerated as shown in fig. 2 (refer to curve 1 and curve 2 in fig. 3), the temperature of the freezing chamber is reduced more, and the starting point of temperature rise after entering the defrosting period is lower. After defrosting, the temperature rising rate is the same, the highest point temperature of temperature rising is lower, the temperature falling in the set time is relatively lower, and the temperature is not easy to exceed the temperature rising requirement of the freezing chamber compared with the temperature before forced cooling.
In another embodiment, the second control unit 120 does not refrigerate the other compartments of the refrigerator except for the freezing compartment after the other compartments are cooled down to the corresponding stop point temperature. The temperature of other compartments except the freezing compartment is reduced to the corresponding stop point temperature, and the temperature rise can be met under the condition of no refrigeration during defrosting. The other compartments except the freezing compartment can be a refrigerating compartment, the temperature of the refrigerating compartment is detected after the preset refrigeration mode is entered, whether the temperature is reduced to the stop point temperature corresponding to the refrigerating compartment is judged, and the refrigerating compartment is not refrigerated after the temperature reduced to the stop point temperature of the refrigerating compartment is detected. After the forced cooling mode is operated for a certain time, if the refrigerating chamber is refrigerated, the temperature of the refrigerating chamber is slowly reduced, so that the temperature rising starting point of the refrigerating chamber after the refrigerating chamber enters a defrosting period is high, and the temperature after defrosting is reduced in a specified time and compared with the temperature before the forced cooling mode is operated, the temperature rising starting point of the refrigerating chamber is possibly exceeded, so that the refrigerating chamber is not refrigerated after the temperature of the refrigerating chamber is reduced to the corresponding stop point temperature.
The manner of the second control unit 120 not to refrigerate the other compartments of the refrigerator except for the freezing compartment may specifically include raising the starting point temperature of the other compartments to a preset temperature, closing the air doors of the other compartments, and/or closing the air return openings of the other compartments, which is the same as the foregoing embodiment, and reference may be made to the foregoing specific embodiment, which is not repeated herein.
The third control unit 130 is configured to control the defrosting heater of the refrigerator to operate to defrost after the time of entering the preset cooling mode reaches a second preset time and the second control unit 120 is configured to control the defrosting heater of the refrigerator to operate.
In a specific embodiment, after the time for entering the preset cooling mode reaches a second preset time, the third control unit 130 controls the refrigerator to exit the preset cooling mode, and controls a defrosting heater of the refrigerator to operate to defrost. The refrigeration time of the preset refrigeration mode is equal to a second preset time, namely the refrigeration time of the preset refrigeration mode is divided into two stages, wherein the period of time from entering the preset refrigeration mode to the first preset time is one stage, and the period of time from the first preset time to the second preset time is the other stage of strong cooling. Preferably, the first preset time is equal to half of the second preset time, that is, the refrigerating time in the strong cooling mode is divided into a first half time and a second half time. When the time for entering the preset cooling mode reaches a second preset time, the preset cooling mode is exited, that is, after the cooling time of the preset cooling mode is finished, the third control unit 130 controls the defrosting heater of the refrigerator to operate to defrost.
In another embodiment, after the temperature of the freezing compartment is decreased to the corresponding stop point temperature, the third control unit 130 controls the refrigerator to exit the preset cooling mode, and controls the defrosting heater of the refrigerator to operate to defrost. That is, after the temperature of the other compartments except the freezing compartment reaches the corresponding stop point temperature, the temperature of the freezing compartment is detected, and when the temperature of the freezing compartment is reduced to the stop point temperature of the freezing compartment, the refrigerator is controlled to exit the preset refrigeration mode and defrost.
Optionally, before the defrosting heater of the refrigerator is controlled to work, return air defrosting is carried out, namely hot air (generally 2-10 ℃) in the refrigerating chamber returns to the evaporator (generally-20 ℃ to-30 ℃) to defrost the evaporator, and after the return air defrosting is finished, the defrosting heater is controlled to work to defrost.
Preferably, in the preset refrigeration mode, before the time of entering the preset refrigeration mode reaches a first preset time or before the temperature of the freezing chamber is reduced to the corresponding stop point temperature, the stop point temperature of the other compartments of the refrigerator except the freezing chamber is lower than the stop point temperature in the normal operation mode. For example 1-3 deg.c lower than the shutdown temperature in the normal operation mode. The normal operation mode is specifically a normal operation mode of the refrigerator. For example, the system operates according to the start-up temperature and the stop-point temperature of the compartment refrigeration which meet the national standards. For example, in the normal operation mode, the temperature of the refrigerating chamber at the stop point for refrigerating is 3 ℃, and then in the first preset time of entering the preset refrigerating mode, when the detected temperature is lower than 2 ℃, the refrigerating chamber is stopped (the air door is closed) and does not refrigerate.
Specifically, in order to compensate for the fact that the refrigerating chamber is not refrigerated after the time of entering the preset refrigerating mode reaches the first preset time, and the temperature of the refrigerating chamber rises back to a high level during defrosting, the shutdown point temperature of other compartments of the refrigerator except the freezing chamber is lower than the shutdown point temperature in the normal operation mode before the time of entering the preset refrigerating mode reaches the first preset time or before the temperature of the freezing chamber is reduced to the corresponding shutdown point temperature. For example, during the first half of the strong cooling, the other compartments are refrigerated when the other compartments may have refrigeration requirements, and the temperature of the shutdown points of the other compartments is reduced by a little relative to the temperature of the shutdown points in the non-strong cooling mode, for example, by 1 ℃ to 3 ℃, so that the temperature of the other compartments can be raised to meet the requirement under the condition that the other compartments except the freezing compartment are not refrigerated during the second half of the strong cooling and are not refrigerated during the defrosting period. Before the freezing chamber temperature is reduced to the corresponding stop point temperature, the stop point temperature of other compartments except the freezing chamber of the refrigerator is lower than that in the normal operation mode, so that the temperatures of the compartments except the freezing chamber can be cooled more quickly.
Fig. 4 is a graph illustrating a temperature change curve of the refrigerating compartment and the freezing compartment after a refrigerating compartment stop point is adjusted down during a first half of a strong cooling period according to an embodiment of the present invention. As shown in fig. 4, a curve 21 is a refrigerating compartment temperature change curve, a curve 22 is a freezing compartment temperature change curve, 3 is a compressor power during cooling, and 4 is a defrosting power during defrosting by a defrosting heater. Still taking the forced cooling mode as an example, as shown in fig. 4, in the first half of the forced cooling, the down-regulation control is performed on the temperature of the stop point of the refrigerating chamber, that is, the temperature of the stop point of the refrigerating chamber in the first half of the forced cooling is lower than that of the stop point of the refrigerating chamber in the normal operation mode, so that the temperature of the refrigerating chamber does not rise too high during the second half of the forced cooling and the defrosting.
The refrigerating chamber refrigeration has great influence on the temperature of the freezing chamber, most of the refrigerating chambers of the air-cooled refrigerators are refrigerated by pumping cold air from the freezing chamber, for example, the temperature of the refrigerating chamber is generally 5 ℃, the temperature of the freezing chamber is generally-18 ℃, return air is hot air above 0 ℃ when the refrigerating air is pumped, the temperature of an evaporator rises, the temperature of the freezing chamber drops, the speed is greatly reduced, and the temperature of the freezing chamber rises after defrosting.
According to the embodiment of the invention, the refrigerating chamber is not refrigerated in the latter half period of strong cooling, the temperature of the refrigerating chamber is lower than that of the refrigerating chamber which is raised in a normal condition, so that the required time for refrigeration is shorter after defrosting is finished, as shown in fig. 2, 5 is the compressor power for refrigeration after defrosting under the condition that the refrigerating chamber is not limited to be refrigerated in the latter half period of strong cooling, as shown in fig. 3 and 4, 6 is the compressor power for defrosting under the condition that the refrigerating chamber is not refrigerated in the latter half period of strong cooling, and when the refrigerating chamber is not refrigerated in the latter half period of strong cooling, the temperature of the refrigerating chamber is raised in a defrosting state, the energy required for pulling back the temperature is less, the refrigerating time is reduced, so that the refrigerating time is shortened, and the refrigerating chamber is shut down in advance; in the case where the control is uniform before defrosting, the consumed electric power is relatively small.
The invention also provides a storage medium corresponding to the refrigerator defrosting control method, and a computer program is stored on the storage medium, and when the program is executed by a processor, the program realizes the steps of any one of the methods.
The invention also provides a refrigerator corresponding to the refrigerator defrosting control method, which comprises a processor, a memory and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the program to realize the steps of any one of the methods.
The invention also provides a refrigerator corresponding to the refrigerator defrosting control device, which comprises the refrigerator defrosting control device.
Therefore, according to the scheme provided by the invention, the freezing chamber is refrigerated before defrosting, so that the temperature rise of the freezing chamber does not exceed the temperature rise threshold of the freezing chamber during defrosting of the refrigerator, and the consistency of the temperature rise of the freezing chamber during testing of the refrigerator in batch production can be ensured, so that the cost required by modification from a structure or a refrigerating device is greatly reduced, the consistency is ensured, and the design does not need to leave a large margin.
The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope and spirit of the invention and the following claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hardwired, or a combination of any of these. In addition, each functional unit may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and the parts serving as the control device may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The above description is only an example of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (8)
1. A refrigerator defrosting control method is characterized by comprising the following steps:
before defrosting the refrigerator, controlling the refrigerator to enter a preset refrigeration mode;
after the time of entering the preset refrigeration mode reaches a first preset time or the temperature of other compartments except the freezing compartment is reduced to the corresponding shutdown point temperature, other compartments except the freezing compartment of the refrigerator are not refrigerated;
after the time of entering the preset refrigeration mode reaches a second preset time or the temperature of the freezing chamber is reduced to the temperature of a corresponding stop point, controlling the refrigerator to exit the preset refrigeration mode, and controlling a defrosting heater of the refrigerator to work so as to defrost;
before the time of entering the preset refrigeration mode reaches a first preset time, the shutdown point temperature of other compartments of the refrigerator except the freezing compartment is lower than that in the normal operation mode.
2. The method of claim 1, wherein the not refrigerating the other compartments of the refrigerator except for the freezing compartment comprises:
and raising the starting point temperature of the other chambers to a preset temperature, closing the air doors of the other chambers and/or closing the air return openings of the other chambers.
3. The method according to claim 1 or 2,
the first preset time is equal to one half of the second preset time.
4. A refrigerator defrosting control device is characterized by comprising:
the first control unit is used for controlling the refrigerator to enter a preset refrigeration mode before defrosting the refrigerator;
the second control unit is used for enabling other compartments except the freezing compartment of the refrigerator not to be refrigerated after the time for entering the preset refrigeration mode reaches first preset time or the temperature of other compartments except the freezing compartment is reduced to the corresponding shutdown point temperature;
the third control unit is used for controlling the refrigerator to exit the preset refrigeration mode and controlling a defrosting heater of the refrigerator to work to defrost after the time for entering the preset refrigeration mode reaches a second preset time or the temperature of the freezing chamber is reduced to the corresponding stop point temperature;
before the time of entering the preset refrigeration mode reaches a first preset time, the shutdown point temperature of other compartments of the refrigerator except the freezing compartment is lower than that in the normal operation mode.
5. The apparatus as claimed in claim 4, wherein the second control unit for not refrigerating the compartments of the refrigerator other than the freezing compartment comprises:
and raising the starting point temperature of the other chambers to a preset temperature, closing the air doors of the other chambers and/or closing the air return openings of the other chambers.
6. The apparatus according to claim 4 or 5,
the first preset time is equal to one half of the second preset time.
7. A storage medium, having stored thereon a computer program which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 3.
8. A refrigerator comprising a processor, a memory, and a computer program stored on the memory and operable on the processor, the processor implementing the steps of the method of any one of claims 1 to 3 when executing the program, or comprising the refrigerator defrosting control apparatus of any one of claims 4 to 6.
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| CN112378158B (en) * | 2020-11-06 | 2022-06-14 | 卡奥斯工业智能研究院(青岛)有限公司 | Refrigerator control method and device, electronic equipment and storage medium |
| CN112944798B (en) * | 2021-03-09 | 2022-03-25 | 珠海格力电器股份有限公司 | Refrigerator control method, refrigerator and storage medium |
| CN113503664A (en) * | 2021-07-23 | 2021-10-15 | 珠海格力电器股份有限公司 | Control method of variable frequency compressor and refrigeration appliance |
| CN113654296B (en) * | 2021-08-12 | 2022-07-15 | 珠海格力电器股份有限公司 | Refrigerator defrosting control method and device, storage medium and refrigerator |
| CN113959161B (en) * | 2021-10-09 | 2023-05-02 | Tcl家用电器（合肥）有限公司 | Refrigerator defrosting control method and device, storage medium and electronic equipment |
| CN113865218B (en) * | 2021-11-02 | 2022-06-10 | 珠海格力电器股份有限公司 | Method for adjusting precooling time before defrosting, refrigeration equipment and storage medium |
| CN114322411A (en) * | 2021-12-30 | 2022-04-12 | Tcl家用电器（合肥）有限公司 | Control method and device of refrigeration equipment, storage medium and refrigeration equipment |
| CN116123808B (en) * | 2022-12-20 | 2024-06-11 | 珠海格力电器股份有限公司 | Defrosting method and module for refrigerator, electronic equipment and readable medium |
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