CN114165979A - Refrigerator and operation control method for unfreezing function of refrigerator - Google Patents
Refrigerator and operation control method for unfreezing function of refrigerator Download PDFInfo
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- CN114165979A CN114165979A CN202111162865.4A CN202111162865A CN114165979A CN 114165979 A CN114165979 A CN 114165979A CN 202111162865 A CN202111162865 A CN 202111162865A CN 114165979 A CN114165979 A CN 114165979A
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000010257 thawing Methods 0.000 claims abstract description 108
- 235000013305 food Nutrition 0.000 claims abstract description 53
- 230000004308 accommodation Effects 0.000 claims abstract description 41
- 239000000463 material Substances 0.000 claims abstract description 23
- 239000003507 refrigerant Substances 0.000 claims description 18
- 238000007710 freezing Methods 0.000 claims description 11
- 230000008014 freezing Effects 0.000 claims description 11
- 230000003993 interaction Effects 0.000 claims description 10
- 230000006870 function Effects 0.000 description 71
- 238000010586 diagram Methods 0.000 description 8
- 230000006872 improvement Effects 0.000 description 8
- 238000012546 transfer Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 4
- 238000010411 cooking Methods 0.000 description 4
- 238000004321 preservation Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 235000016709 nutrition Nutrition 0.000 description 1
- 230000035764 nutrition Effects 0.000 description 1
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- 231100000572 poisoning Toxicity 0.000 description 1
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- 230000004044 response Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000002791 soaking Methods 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
- F25D29/00—Arrangement or mounting of control or safety devices
Abstract
The invention discloses a refrigerator and an operation control method of a defrosting function of the refrigerator. The refrigerator comprises a thawing accommodation cavity, a temperature collector, a heat exchanger and a flow reversing valve. The method comprises the following steps: responding to a preset unfreezing function starting instruction, and controlling the unfreezing accommodating cavity to sequentially enter each unfreezing function operation stage; acquiring a preset operation duration and a target temperature threshold corresponding to a current unfreezing function operation stage; and in the running time, controlling the flow direction of the flow reversing valve according to the comparison relation between the target temperature threshold and the indoor temperature of the unfreezing accommodating cavity, so that the heat exchanger provides heat for the unfreezing accommodating cavity, or provides cold for the unfreezing accommodating cavity, and the indoor temperature is kept near the corresponding target temperature threshold. By adopting the embodiment of the invention, the thawing chamber can be controlled to enter different operation stages, so that different storage temperatures are provided for food materials, the thawing requirements of users are met, and the quality of the food materials is ensured.
Description
Technical Field
The invention relates to the technical field of refrigerator control, in particular to a refrigerator and an operation control method for a defrosting function of the refrigerator.
Background
With the economic development and the improvement of the living standard of people, the refrigerator has long become an essential household appliance in daily life of people. The refrigerator mainly delays the deterioration of food by reducing the temperature of the food, thereby achieving the effect of long-term storage.
Cryopreserved foods require a thawing process before use, but people often do not have the full time to wait for the food to completely thaw. Sometimes people need to take food from the freezing area of the refrigerator to the fresh-keeping area of the refrigerator for thawing or taking food to the outside of the refrigerator for natural thawing in the morning or in the night before the day, and then cook the food after returning home in the evening. Alternatively, the food in the refrigerator is taken out before cooking, and is thawed by soaking in warm water or heating in a microwave oven.
However, the inventors found that the prior art has at least the following problems: food is very slow to thaw in a fresh-keeping area of the refrigerator, and the thawing is probably not completed by the time of cooking; when the food is naturally thawed outside the refrigerator, the situation that the food is thawed after being used for several hours, but the food can be cooked after waiting for several hours can occur, and the food after being thawed can be quickly deteriorated when being placed in a normal-temperature environment, the nutrition and the taste are lost, and even food deterioration and poisoning accidents occur; when the food is thawed by using warm water or a microwave oven, the surface of the food is quickly heated and thawed, but the middle part of the food is still a large ice pit, so that the taste of the food is influenced.
Disclosure of Invention
The embodiment of the invention aims to provide a refrigerator and an operation control method for a defrosting function of the refrigerator, which can control a defrosting chamber to enter different defrosting function operation stages, so that different storage temperatures are provided for food materials, the defrosting requirement of a user is met, and the quality of the food materials is ensured.
To achieve the above object, an embodiment of the present invention provides a refrigerator, including: the device comprises a thawing accommodating cavity, a temperature collector, a heat exchanger, a flow reversing valve and a controller;
the thawing accommodation cavity is arranged in the refrigerator body of the refrigerator and is used for storing food materials; the temperature collector and the heat exchanger are arranged in the unfreezing accommodating cavity;
the temperature collector is used for collecting the indoor temperature of the current unfreezing accommodating cavity;
the heat exchanger is connected with a heat conveying channel of the refrigerator through the flow reversing valve to provide heat for the unfreezing accommodating cavity, or is connected with a cold conveying channel of the refrigerator to provide cold for the unfreezing accommodating cavity;
the controller is respectively connected with the temperature collector and the flow reversing valve and is used for:
responding to a preset unfreezing function starting instruction, and controlling the unfreezing accommodating cavity to enter a first unfreezing function operation stage;
acquiring a preset operation duration and a target temperature threshold corresponding to a current unfreezing function operation stage;
controlling the flow direction of the flow reversing valve according to the comparison relation between the target temperature threshold and the indoor temperature of the unfreezing accommodating cavity within the running time so as to enable the heat exchanger to be connected with the heat conveying channel or the cold conveying channel;
and after the operation is finished, controlling the unfreezing accommodating cavity to enter the next unfreezing function operation stage.
As an improvement of the above scheme, the controlling, within the operating time period, a flow direction of the flow reversing valve according to a comparison relationship between the target temperature threshold and an indoor temperature of the thawing accommodation chamber specifically includes:
after entering the current defrosting function operation stage, if the indoor temperature of the defrosting accommodating cavity is smaller than the target temperature threshold, controlling the initial flow direction of the flow reversing valve to be a first flow direction so as to connect the heat exchanger with the heat conveying channel; if the indoor temperature of the unfreezing accommodating cavity is larger than the target temperature threshold value, controlling the initial flow direction of the flow reversing valve to be a second flow direction so as to connect the heat exchanger with the cold energy conveying channel;
after the initial flow direction of the flow reversing valve is controlled, in the running time, when the difference value between the indoor temperature of the unfreezing accommodating cavity and the target temperature threshold is smaller than a first temperature difference threshold or larger than a second temperature difference threshold, the flow reversing valve is controlled to switch the flow direction; wherein the first temperature difference threshold is less than the second temperature difference threshold.
As a refinement of the above solution, the first temperature difference threshold is smaller than 0, and the second temperature difference threshold is larger than 0.
As an improvement of the above, the refrigerator includes a condenser and an evaporator; the heat conveying channel is a refrigerant conveying channel passing through the condenser, and the cold conveying channel is a refrigerant conveying channel passing through the evaporator;
when the flow reversing valve is switched to a first flow direction, the input end of the heat exchanger is communicated with the input end of the condenser, and the output end of the heat exchanger is communicated with the output end of the condenser;
when the flow reversing valve is switched to the second flow direction, the input end of the heat exchanger is communicated with the input end of the evaporator, and the output end of the heat exchanger is communicated with the output end of the evaporator.
As an improvement of the scheme, the thawing function operation stage is divided into a freezing stage, a thawing stage and a preservation stage in sequence; the preset target temperature threshold corresponding to the freezing stage is smaller than the preset target temperature threshold corresponding to the fresh-keeping stage, and the preset target temperature threshold corresponding to the fresh-keeping stage is smaller than the preset target temperature threshold corresponding to the thawing stage.
As an improvement of the above scheme, the refrigerator further comprises a flow control valve, the input end of the heat exchanger is connected with the flow reversing valve through the flow control valve, and the flow control valve is used for controlling the flow flowing through the heat exchanger.
As an improvement of the above, the controller is further connected to the flow control valve, and the controller is further configured to:
controlling the opening degree of the flow control valve according to the difference between the indoor temperature and the target temperature threshold;
when the heat exchanger is connected with a heat conveying channel of a refrigerator, the smaller the difference between the indoor temperature and the target temperature threshold value is, the larger the opening degree of the flow control valve is; when the heat exchanger is connected with a cold energy conveying channel of the refrigerator, the larger the difference between the indoor temperature and the target temperature threshold value is, the larger the opening degree of the flow control valve is.
As an improvement of the above scheme, the refrigerator further comprises a human-computer interaction module;
the human-computer interaction module is used for receiving a thawing function starting instruction input by a user, and setting the running time and the target temperature threshold of each thawing function running stage.
As an improvement of the above scheme, the human-computer interaction module is further configured to: and after the last unfreezing function operation phase is finished, executing preset information pushing operation.
The embodiment of the invention also provides an operation control method for the unfreezing function of the refrigerator, and the refrigerator comprises the following steps: the device comprises a thawing accommodating cavity, a temperature collector, a heat exchanger and a flow reversing valve;
the thawing accommodation cavity is arranged in the refrigerator body of the refrigerator and is used for storing food materials; the temperature collector and the heat exchanger are arranged in the unfreezing accommodating cavity;
the temperature collector is used for collecting the indoor temperature of the current unfreezing accommodating cavity;
the heat exchanger is connected with a heat conveying channel of the refrigerator through the flow reversing valve to provide heat for the unfreezing accommodating cavity, or is connected with a cold conveying channel of the refrigerator to provide cold for the unfreezing accommodating cavity;
the method comprises the following steps:
responding to a preset unfreezing function starting instruction, and controlling the unfreezing accommodating cavity to enter a first unfreezing function operation stage;
acquiring a preset operation duration and a target temperature threshold corresponding to a current unfreezing function operation stage;
acquiring the indoor temperature of the unfreezing accommodating cavity acquired by the temperature acquisition device;
controlling the flow direction of the flow reversing valve according to the comparison relation between the target temperature threshold and the indoor temperature of the unfreezing accommodating cavity within the running time so as to enable the heat exchanger to be connected with the heat conveying channel or the cold conveying channel;
and after the operation is finished, controlling the unfreezing accommodating cavity to enter the next unfreezing function operation stage.
Compared with the prior art, the refrigerator and the operation control method of the unfreezing function of the refrigerator disclosed by the embodiment of the invention comprise the unfreezing accommodating cavity, the temperature collector, the heat exchanger, the flow reversing valve and the controller. The controller is configured to: responding to a preset unfreezing function starting instruction, and controlling the unfreezing accommodating cavity to sequentially enter each unfreezing function operation stage; acquiring a preset operation duration and a target temperature threshold corresponding to a current unfreezing function operation stage; and during the running time, controlling the flow direction of the flow reversing valve according to the comparison relation between the target temperature threshold and the indoor temperature of the unfreezing containing cavity, so that the heat exchanger is connected with a heat conveying channel to provide heat for the unfreezing containing cavity, or is connected with a cold conveying channel to provide cold for the unfreezing containing cavity, and the indoor temperature is maintained near the corresponding target temperature threshold. By adopting the embodiment of the invention, the unfreezing containing cavity is controlled to enter different unfreezing function operation stages, so that different storage temperatures are provided for the food materials in the unfreezing containing cavity in different time periods, the food materials can be unfrozen quickly, and the food materials can be stored at a proper temperature for fresh keeping after unfreezing, the unfreezing requirement of a user is met, the quality of the food materials is ensured, and the use experience of the user is effectively improved.
Drawings
Fig. 1 is a schematic structural diagram of a refrigerator according to an embodiment of the present invention;
fig. 2 is a schematic view of a work flow performed by a controller of a refrigerator in an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a preferred refrigerator according to an embodiment of the present invention;
FIG. 4 is a schematic illustration of the operational stages of the defrost function in an embodiment of the present invention;
FIG. 5 is a schematic diagram illustrating the relationship between the opening of the flow control valve and the temperature difference threshold according to an embodiment of the present invention;
fig. 6 is a flowchart illustrating an operation control method of a defrosting function of a refrigerator according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
Referring to fig. 1, a schematic structural diagram of a refrigerator according to an embodiment of the present invention is shown. An embodiment of the present invention provides a refrigerator 10, including: the defrosting and containing device comprises a defrosting and containing cavity 11, a temperature collector 12, a heat exchanger 13, a flow reversing valve 14 and a controller 15.
The thawing accommodation cavity 11 is arranged in the refrigerator body of the refrigerator and is used for storing food materials; the temperature collector 12 and the heat exchanger 13 are arranged in the unfreezing accommodating cavity 11;
the temperature collector 12 is used for collecting the current indoor temperature of the thawing accommodation cavity 11;
the heat exchanger 13 is connected with a heat conveying channel of the refrigerator through the flow reversing valve 14 to provide heat for the unfreezing accommodating cavity, or is connected with a cold conveying channel of the refrigerator to provide cold for the unfreezing accommodating cavity.
And the controller 15 is respectively connected with the temperature collector 12 and the flow reversing valve 14. Referring to fig. 2, a schematic diagram of a workflow executed by the controller of the refrigerator according to the embodiment of the present invention is shown. The controller 15 is configured to execute steps S11 to S14:
s11, responding to a preset unfreezing function starting instruction, and controlling the unfreezing accommodating cavity to enter a first unfreezing function operation stage;
s12, acquiring a preset operation duration and a target temperature threshold corresponding to the current defrosting function operation stage;
s13, controlling the flow direction of the flow reversing valve according to the comparison relation between the target temperature threshold and the indoor temperature of the unfreezing accommodating cavity in the running time period, so that the heat exchanger is connected with the heat conveying channel or the cold conveying channel;
and S14, controlling the unfreezing accommodating cavity to enter the next unfreezing function operation stage after the operation is finished.
In the embodiment of the present invention, an independent temperature zone, that is, the thawing accommodation chamber 11, is provided in the refrigerator, and the indoor temperature of the temperature zone is adjustable, and the adjustable range of the temperature is relatively large, for example, from-20 ℃ to 30 ℃.
The thawing accommodation chamber is provided with an independent heat exchanger 13, and the heat exchanger 13 can be switched and communicated to a heat conveying channel or a cold conveying channel of the refrigerator through a flow reversing valve 14.
When the heat exchanger 13 is connected with the heat transfer passage, the thermal state refrigerant in the heat transfer passage flows through the heat exchanger 13, and then transfers heat to the thawing accommodation chamber 11 through the heat exchanger 13, so as to heat the thawing accommodation chamber 11, thereby increasing the indoor temperature of the thawing accommodation chamber 11. When the heat exchanger 13 is connected with the cold energy conveying channel, the cold refrigerant in the cold energy conveying channel flows through the heat exchanger 13, and then the cold energy is transmitted into the unfreezing accommodating cavity 11 through the heat exchanger 13 to refrigerate the unfreezing accommodating cavity 11, so that the indoor temperature of the unfreezing accommodating cavity 11 is reduced.
The refrigerator is added with a reserved unfreezing function, under the functional mode, the unfreezing accommodating cavity 11 can sequentially enter a plurality of preset unfreezing function operation stages, and each unfreezing function operation stage has a corresponding preset operation time length and a target temperature threshold value.
It should be noted that the operation time length and the target temperature threshold may be set as default values, or may be set according to actual requirements of users. The operation time length can also be set to be zero, if the time of a certain stage is set to be zero, the temperature control of the stage is not executed, and the next stage is directly entered.
Specifically, after a user puts food materials to be thawed into the thawing accommodation cavity and starts the reserved thawing function, the thawing accommodation cavity 11 is controlled to enter a first thawing function operation stage in response to a preset thawing function starting instruction; further, acquiring a preset operation duration and a target temperature threshold corresponding to the current unfreezing function operation stage; in the running time, according to the comparison relationship between the target temperature threshold and the indoor temperature of the thawing accommodation cavity 11, controlling the flow reversing valve 14 to switch different flow directions, so that the heat exchanger 13 is connected with the heat transfer channel, and providing heat for the thawing accommodation cavity 11; or the heat exchanger 13 is connected with the heat transfer channel, so as to provide cold energy for the thawing accommodation chamber 11, and finally, the indoor temperature of the thawing accommodation chamber 11 can be maintained near the target temperature threshold corresponding to the thawing function operation stage.
After the running time corresponding to the first thawing function running stage is finished, the thawing accommodation cavity 11 is controlled to enter the next thawing function running stage, the running time and the target temperature threshold corresponding to the next thawing function running stage are obtained again, and the flow direction switching control of the flow reversing valve is executed by combining the current indoor temperature of the thawing accommodation cavity.
The embodiment of the invention provides a refrigerator which comprises a unfreezing accommodating cavity, a temperature collector, a heat exchanger, a flow reversing valve and a controller. The controller is configured to: responding to a preset unfreezing function starting instruction, and controlling the unfreezing accommodating cavity to sequentially enter each unfreezing function operation stage; acquiring a preset operation duration and a target temperature threshold corresponding to a current unfreezing function operation stage; and during the running time, controlling the flow direction of the flow reversing valve according to the comparison relation between the target temperature threshold and the indoor temperature of the unfreezing containing cavity, so that the heat exchanger is connected with a heat conveying channel to provide heat for the unfreezing containing cavity, or is connected with a cold conveying channel to provide cold for the unfreezing containing cavity, and the indoor temperature is maintained near the corresponding target temperature threshold. By adopting the embodiment of the invention, the unfreezing containing cavity is controlled to enter different unfreezing function operation stages, so that different storage temperatures are provided for the food materials in the unfreezing containing cavity in different time periods, the food materials can be unfrozen quickly, and the food materials can be stored at a proper temperature for fresh keeping after unfreezing, the unfreezing requirement of a user is met, the quality of the food materials is ensured, and the use experience of the user is effectively improved.
As a preferred embodiment, step S13 is specifically executed by steps S131 to S132:
s131, after the current defrosting function operation stage is started, if the indoor temperature of the defrosting accommodating cavity is smaller than the target temperature threshold value, controlling the initial flow direction of the flow reversing valve to be a first flow direction so as to enable the heat exchanger to be connected with the heat conveying channel; if the indoor temperature of the unfreezing accommodating cavity is larger than the target temperature threshold value, controlling the initial flow direction of the flow reversing valve to be a second flow direction so as to connect the heat exchanger with the cold energy conveying channel;
s132, after the initial flow direction of the flow reversing valve is controlled, in the running time, when the difference value between the indoor temperature of the unfreezing accommodating cavity and the target temperature threshold value is smaller than a first temperature difference threshold value or larger than a second temperature difference threshold value, the flow reversing valve is controlled to switch the flow direction; wherein the first temperature difference threshold is less than the second temperature difference threshold.
In the embodiment of the invention, the defrosting function is started at each timeAfter the line phase, the initial flow direction of the flow reversing valve 14 is first controlled according to the relation between the indoor temperature of the thawing accommodation chamber 11 and the target temperature threshold. If the indoor temperature T of the unfreezing accommodating cavity is less than the target temperature threshold value TsetIf so, controlling the initial flow direction of the flow reversing valve 14 to be a first flow direction, that is, the heat exchanger 13 is connected to the heat transfer channel to provide heat for the thawing accommodation chamber 11, so as to increase the indoor temperature of the thawing accommodation chamber 11; if the indoor temperature T of the thawing accommodation chamber 11 is greater than the target temperature threshold value TsetThen, the initial flow direction of the flow reversing valve 14 is controlled to be the second flow direction, that is, the heat exchanger 13 is connected to the cold energy transmission channel to provide cold energy for the thawing accommodation chamber 11, so as to reduce the indoor temperature of the thawing accommodation chamber 11.
Then, in order to avoid frequent switching control of the flow rate switching valve, after the initial flow direction of the flow rate switching valve 14 is determined, when the difference (T-T) between the indoor temperature of the defrosting accommodating chamber 11 and the target temperature threshold valueset) Less than a first temperature difference threshold T1Or greater than a second temperature difference threshold T2And when the flow direction is switched, the flow reversing valve is controlled to switch the flow direction.
Specifically, when the initial flow direction of the flow reversing valve 14 is the first flow direction, the indoor temperature of the defrosting accommodating chamber 11 will continuously rise under the heating control of the heat exchanger 13 until the temperature difference T-Tset>T2Then the flow direction change valve 14 is controlled to switch the flow direction, that is, to switch to the second flow direction, so as to perform cooling. When the initial flow direction of the flow reversing valve 14 is the second flow direction, the indoor temperature of the thawing accommodation chamber 11 is continuously reduced under the refrigeration control of the heat exchanger 13 until the temperature difference T-Tset<T1Then, the flow direction switching valve 14 is controlled to switch the flow direction, that is, to the first flow direction, so as to perform heating.
Preferably, the first temperature difference threshold is less than 0 and the second temperature difference threshold is greater than 0.
It should be noted that the first temperature difference threshold and the second temperature difference threshold may be set according to actual situations, and are not specifically limited herein.
By adopting the technical means of the embodiment of the invention, the indoor temperature of the unfreezing accommodating cavity can be effectively maintained near the target temperature threshold corresponding to the current unfreezing function operation stage, the frequent switching control of the flow reversing valve can be avoided, and the temperature control logic of each operation stage is optimized.
As a preferred embodiment, refer to fig. 3, which is a schematic structural diagram of a preferred refrigerator provided in an embodiment of the present invention. The embodiment of the present invention is implemented on the basis of the above-described embodiment, and the refrigerator 10 includes a condenser 16 and an evaporator 17.
Then, the heat transport channel is a refrigerant transport channel passing through the condenser 16, and the cold transport channel is a refrigerant transport channel passing through the evaporator 17. When the flow reversing valve 14 is switched to the first flow direction, the input end of the heat exchanger 13 is communicated with the input end of the condenser 16, and the output end of the heat exchanger 13 is communicated with the output end of the condenser 16; when the flow reversing valve 14 is switched to the second flow direction, the input end of the heat exchanger 13 is communicated with the input end of the evaporator 17, and the output end of the heat exchanger 13 is communicated with the output end of the evaporator 17.
As shown in fig. 3, the input end a1 of the heat exchanger can be selectively communicated with the input end B1 of the condenser through the flow reversing valve 14, and the output end a2 of the heat exchanger is communicated with the output end B2 of the condenser; or the input end A1 of the heat exchanger is communicated with the input end C1 of the evaporator, and the output end A2 of the heat exchanger is communicated with the output end C2 of the evaporator.
In the embodiment of the present invention, the flow reversing valve 14 controls the heat exchanger 13 to be connected in parallel to the condenser 16 on the hot side or the evaporator 17 on the cold side, so that the heat exchanger 13 releases heat to the thawing accommodation chamber 11 or absorbs heat from the thawing accommodation chamber 11, thereby achieving the heating or cooling effect.
Specifically, when the heat exchanger 13 communicates with the condenser 16 through the flow switching valve 14, the refrigerant is divided into two paths to flow through the condenser 16 and the heat exchanger 13, respectively. Because the refrigerant is in a thermal state at this time, the heat of the refrigerant is transferred to the thawing accommodation chamber through the heat exchanger 13, so that the temperature in the accommodation chamber is increased. When the heat exchanger 13 communicates with the evaporator 17 through the flow switching valve 14, the refrigerant is divided into two paths to flow through the evaporator 17 and the heat exchanger 13, respectively. Since the refrigerant is in a cold state, the heat of the thawing accommodation chamber 11 is transferred to the refrigerant through the heat exchanger 13, so that the temperature in the accommodation chamber is reduced.
Preferably, still be provided with fan assembly in the holding chamber 11 that unfreezes, fan assembly includes fan and fan guard, is used for the holding intracavity that unfreezes forms the circulation air current, strengthens refrigeration effect or heating effect.
By adopting the technical means of the embodiment of the invention, the heating or refrigeration control of the unfreezing accommodating cavity is realized through the refrigerant transmission channel where the condenser and the evaporator which are originally configured in the refrigerator are located, the energy resources of the refrigerator are effectively utilized, and the temperature control strategy is simple and effective.
Referring to fig. 4, a schematic diagram of the operation stage of the defrosting function in the embodiment of the present invention is shown as a preferred embodiment. In the embodiment of the invention, the unfreezing function operation stage is divided into a freezing stage, a unfreezing stage and a fresh-keeping stage in sequence. The target temperature threshold and the operating duration may be set separately for each stage.
The freezing phase is set up for the purpose of: sometimes the user leaves for a long time and the food is thawed for a short time, so the food is kept in a frozen state before thawing to reduce the quality loss of the food. The purpose of setting the thawing phase is: different foods have different requirements on thawing parameters, and proper time duration and target temperature thresholds are set to thaw the foods with optimal efficiency or effect. The purpose of setting the preservation stage is as follows: and a reasonable fresh-keeping temperature is set, so that the quality of food can be guaranteed, and the food can be in an optimal cooking state.
Preferably, the preset target temperature threshold corresponding to the freezing stage is smaller than the preset target temperature threshold corresponding to the fresh-keeping stage, and the preset target temperature threshold corresponding to the fresh-keeping stage is smaller than the preset target temperature threshold corresponding to the thawing stage.
The food to be unfrozen is placed into the unfreezing containing cavity by a user, and after the reserved unfreezing function is started, the unfreezing containing cavity sequentially enters a freezing stage, a unfreezing stage and a fresh-keeping stage.
For example, a user 8:00 puts food into the thawing accommodation cavity before work, and the target temperature thresholds and the running time lengths corresponding to the freezing stage, the thawing stage and the preservation stage are respectively-18 ℃/6h, 18 ℃/3h and 4 ℃/1 h. After the user arrives at home at 18:00 after work, the food in the accommodating cavity of the refrigerator is unfrozen and is at the fresh-keeping temperature.
It should be noted that, after the running time of the freshness keeping stage is timed, the temperature in the accommodating cavity changes freely, and no temperature control is executed.
As a preferred embodiment, referring to fig. 3, the refrigerator 10 further includes a human-machine interaction module 18;
the human-computer interaction module 18 is configured to receive a thawing function starting instruction input by a user, and an operation duration and a target temperature threshold set for each thawing function operation stage.
For example, a user sets target temperature thresholds and operation durations of a freezing stage, a thawing stage and a preservation stage through keys or a touch screen of a control panel arranged on the human-computer interaction module 18, and starts the thawing function to input a thawing function starting instruction to the refrigerator.
Preferably, the human-computer interaction module is further configured to: and after the last unfreezing function operation phase is finished, executing preset information pushing operation.
For example, after the three stages of the reserved unfreezing function are executed, the control panel reminds the user that the food is unfrozen in the modes of light, characters, sound or images and the like, and the food can be directly taken out for cooking.
As a preferred embodiment, referring to fig. 3, the refrigerator 10 further includes a flow control valve 19, the input end of the heat exchanger 13 is connected to the flow reversing valve 14 through the flow control valve 19, and the flow control valve 19 is used for controlling the flow passing through the heat exchanger.
Specifically, the controller is further connected to the flow control valve, and the controller 15 is further configured to execute step S15:
s15, determining a difference Δ T between the indoor temperature and the target temperature threshold value (T-T)set) Controlling the opening of the flow control valve;
when the heat exchanger is connected with a heat conveying channel of a refrigerator, the smaller the difference delta T between the indoor temperature and the target temperature threshold value is, the larger the opening degree of the flow control valve is; when the heat exchanger is connected with a cold energy conveying channel of the refrigerator, the larger the difference delta T between the indoor temperature and the target temperature threshold value is, the larger the opening degree of the flow control valve is.
In the embodiment of the present invention, the flow rate of the refrigerant flowing through the heat exchanger 13 is adjusted by adjusting the opening degree of the flow control valve 19, so as to adjust the heat exchange power between the heat exchanger 13 and the air in the thawing accommodation chamber 11, thereby adjusting the temperature rising rate or the temperature lowering rate in the accommodation chamber.
Fig. 5 is a schematic diagram showing the relationship between the opening degree of the flow control valve and the temperature difference threshold value according to the embodiment of the present invention. As an alternative embodiment, by setting the first temperature difference threshold T at1To the second temperature difference threshold T2Within the resulting temperature range, a plurality of temperature difference thresholds, for example a third temperature difference threshold T, are set3And a fourth temperature threshold T4. The magnitude relation of the temperature difference thresholds satisfies the following conditions: t is1<T3<T4<T2。
Preferably, T1<T3<0<T4<T2。
By way of example, in a case, referring to fig. 5(a), when the initial flow direction of the flow reversing valve 14 is the first flow direction, that is, the heat exchanger 13 is connected to the heat transfer passage of the refrigerator, and the heat exchanger 13 heats the defrosting accommodating chamber 11:
when T-Tset<T1The controller 15 controls the opening degree of the flow control valve 19The refrigerant quantity flowing through the heat exchanger is larger, the heat release power of the heat exchanger to the accommodating cavity is larger, and the temperature of the accommodating cavity rises rapidly due to the K11.
When T is1<T-Tset<T3When the opening degree of the flow control valve is adjusted to be K12, the heat release power of the heat exchanger to the accommodating cavity is reduced, and the temperature of the accommodating cavity slowly rises.
When T is3<T-Tset<T4During the process, the opening degree of the flow control valve is adjusted to be K13, and the heat release power to the accommodating cavity is further reduced, so that the temperature of the accommodating cavity approaches to the target temperature as much as possible.
When T is4<T-Tset<T2During the time, the aperture adjustment of flow control valve is K14, further reduces the exothermic power to the holding intracavity, because the aperture of flow control valve is less this moment, and for the heat that the holding chamber provided is less, the holding chamber is greater than the heat that provides to the heat dissipation capacity of outdoor environment, and the temperature in holding chamber slowly drops.
When T-Tset>T2At this time, the flow direction of the flow direction switching valve 14 is switched, that is, the flow direction switching valve 14 is controlled to be switched to the second flow direction, and the heat exchanger 13 refrigerates the thawing accommodation chamber 11. And the opening degree of the flow control valve 19 is adjusted to be K21, the heat exchanger 13 quickly absorbs heat from the accommodating cavity, and the temperature of the accommodating cavity is quickly reduced.
The opening degree of the flow rate control valve satisfies: k11 > K12 > K13 > K14.
In another case, referring to fig. 5(b), when the initial flow direction of the flow reversing valve 14 is the second flow direction, that is, the heat exchanger 13 is connected to the cold energy conveying channel of the refrigerator, and the heat exchanger 13 refrigerates the defrosting accommodating chamber 11:
when T-Tset>T2In the meantime, the controller 15 controls the opening degree of the flow control valve 19 to be K21, so that the amount of the refrigerant flowing through the heat exchanger is large, the heat absorption power of the heat exchanger from the accommodating chamber is large, and the temperature of the accommodating chamber is rapidly reduced.
When T is4<T-Tset<T2Opening degree of the flow control valveWhen the temperature is adjusted to K22, the heat absorption power of the heat exchanger from the accommodating cavity is reduced, and the temperature of the accommodating cavity slowly drops.
When T is3<T-Tset<T4During the operation, the opening degree of the flow control valve is adjusted to K23, and the heat absorption power from the accommodating chamber is further reduced to make the temperature of the accommodating chamber approach the target temperature as much as possible.
When T is1<T-Tset<T3During the process, the opening degree of the flow control valve is adjusted to be K24, the heat absorption power from the accommodating cavity is further reduced, the opening degree of the flow control valve is smaller, the cold quantity provided for the accommodating cavity is smaller, and the heat exchange quantity between the accommodating cavity and the outdoor environment is larger than the provided cold quantity, so that the temperature of the accommodating cavity is slowly increased.
When T-Tset<TtAt this time, the flow direction of the flow reversing valve 14 is switched, that is, the flow reversing valve 14 is controlled to be switched to the first flow direction, and the heat exchanger 13 heats the thawing accommodation chamber 11. And the opening degree of the flow control valve 19 is adjusted to be K11, the heat exchanger 13 releases heat into the accommodating cavity rapidly, and the temperature of the accommodating cavity rises rapidly.
The opening degree of the flow rate control valve satisfies: k21 > K22 > K23 > K24.
It will be appreciated that at said first temperature difference threshold T1To the second temperature difference threshold T2Within the resulting temperature range, a third temperature difference threshold T may also be set3A fourth temperature threshold T4A fifth temperature difference threshold T5And a sixth temperature threshold T6. And the magnitude relation of the temperature difference thresholds satisfies the following conditions: t is1<T3<T4<0<T5<T6<T2. When the initial flow direction of the flow rate switching valve 14 is the first flow direction, the relationship between the opening degree of the flow rate control valve and the temperature difference threshold value is shown in fig. 5(c), wherein K11 > K12 > K13 > K14 > K15 > K16; when the initial flow direction of the flow rate switching valve 14 is the second flow direction, the relationship between the opening degree of the flow rate control valve and the temperature difference threshold value is shown in fig. 5(d), wherein K21 > K22 > K23 > K24 > K25 > K26.
It should be noted that the temperature for reversing the flow reversing valve 14 may also be adjusted according to actual conditions, for example, the reversing at the temperature thresholds T3 and T6 does not affect the beneficial effects obtained by the present invention.
Of course, other number of temperature difference thresholds can be set according to actual conditions, without affecting the beneficial effects of the invention.
By adopting the technical means of the embodiment of the invention, faster and more stable temperature regulation effect can be obtained by setting more temperature difference thresholds.
Referring to fig. 6, a flowchart of an operation control method for a defrosting function of a refrigerator according to an embodiment of the present invention is shown. The embodiment of the invention provides an operation control method for a defrosting function of a refrigerator.
Wherein, the refrigerator includes: the device comprises a thawing accommodating cavity, a temperature collector, a heat exchanger and a flow reversing valve;
the thawing accommodation cavity is arranged in the refrigerator body of the refrigerator and is used for storing food materials; the temperature collector and the heat exchanger are arranged in the unfreezing accommodating cavity; the temperature collector is used for collecting the indoor temperature of the current unfreezing accommodating cavity; the heat exchanger is connected with a heat conveying channel of the refrigerator through the flow reversing valve to provide heat for the unfreezing accommodating cavity, or is connected with a cold conveying channel of the refrigerator to provide cold for the unfreezing accommodating cavity.
The operation control method of the defrosting function of the refrigerator performs by steps S21 to S25:
s21, responding to a preset unfreezing function starting instruction, and controlling the unfreezing accommodating cavity to enter a first unfreezing function operation stage;
s22, acquiring a preset operation duration and a target temperature threshold corresponding to the current defrosting function operation stage;
s23, acquiring the indoor temperature of the thawing accommodation cavity acquired by the temperature acquisition device;
s24, controlling the flow direction of the flow reversing valve according to the comparison relation between the target temperature threshold and the indoor temperature of the unfreezing accommodating cavity in the running time period, so that the heat exchanger is connected with the heat conveying channel or the cold conveying channel;
and S25, controlling the unfreezing accommodating cavity to enter the next unfreezing function operation stage after the operation is finished.
The embodiment of the invention provides an operation control method for a defrosting function of a refrigerator. The method comprises the following steps: responding to a preset unfreezing function starting instruction, and controlling the unfreezing accommodating cavity to sequentially enter each unfreezing function operation stage; acquiring a preset operation duration and a target temperature threshold corresponding to a current unfreezing function operation stage; and in the running time, controlling the flow direction of the flow reversing valve according to the comparison relation between the target temperature threshold and the indoor temperature of the unfreezing containing cavity, so that the heat exchanger is connected with a heat conveying channel to provide heat for the unfreezing containing cavity, or is connected with a cold conveying channel to provide cold for the unfreezing containing cavity, and the indoor temperature is kept near the corresponding target temperature threshold. By adopting the embodiment of the invention, the unfreezing containing cavity is controlled to enter different unfreezing function operation stages, so that different storage temperatures are provided for the food materials in the unfreezing containing cavity in different time periods, the food materials can be unfrozen quickly, and the food materials can be stored at a proper temperature for fresh keeping after unfreezing, the unfreezing requirement of a user is met, the quality of the food materials is ensured, and the use experience of the user is effectively improved.
As a preferred embodiment, step S24 specifically includes:
s241, after the current defrosting function operation stage is started, if the indoor temperature of the defrosting accommodating cavity is smaller than the target temperature threshold value, controlling the initial flow direction of the flow reversing valve to be a first flow direction so as to enable the heat exchanger to be connected with the heat conveying channel; if the indoor temperature of the unfreezing accommodating cavity is larger than the target temperature threshold value, controlling the initial flow direction of the flow reversing valve to be a second flow direction so as to connect the heat exchanger with the cold energy conveying channel;
s242, after the initial flow direction of the flow reversing valve is controlled, in the running time, when the difference value between the indoor temperature of the unfreezing accommodating cavity and the target temperature threshold value is smaller than a first temperature difference threshold value or larger than a second temperature difference threshold value, the flow reversing valve is controlled to switch the flow direction; wherein the first temperature difference threshold is less than the second temperature difference threshold.
Preferably, the first temperature difference threshold is less than 0 and the second temperature difference threshold is greater than 0.
By adopting the technical means of the embodiment of the invention, the indoor temperature of the unfreezing accommodating cavity can be effectively maintained near the target temperature threshold corresponding to the current unfreezing function operation stage, the frequent switching control of the flow reversing valve can be avoided, and the temperature control logic of each operation stage is optimized.
It should be noted that, in the operation control method for a defrosting function of a refrigerator according to an embodiment of the present invention, the refrigerator includes all the functional module configurations in the refrigerator provided in the above embodiment, all the process steps of the method are the same as all the process steps executed by the controller in the refrigerator of the above embodiment, and the working principles and beneficial effects of the two are in one-to-one correspondence, so that details are not repeated.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-only memory (ROM), a Random Access Memory (RAM), or the like.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (10)
1. A refrigerator, characterized by comprising: the device comprises a thawing accommodating cavity, a temperature collector, a heat exchanger, a flow reversing valve and a controller;
the thawing accommodation cavity is arranged in the refrigerator body of the refrigerator and is used for storing food materials; the temperature collector and the heat exchanger are arranged in the unfreezing accommodating cavity;
the temperature collector is used for collecting the indoor temperature of the current unfreezing accommodating cavity;
the heat exchanger is connected with a heat conveying channel of the refrigerator through the flow reversing valve to provide heat for the unfreezing accommodating cavity, or is connected with a cold conveying channel of the refrigerator to provide cold for the unfreezing accommodating cavity;
the controller is respectively connected with the temperature collector and the flow reversing valve and is used for:
responding to a preset unfreezing function starting instruction, and controlling the unfreezing accommodating cavity to enter a first unfreezing function operation stage;
acquiring a preset operation duration and a target temperature threshold corresponding to a current unfreezing function operation stage;
controlling the flow direction of the flow reversing valve according to the comparison relation between the target temperature threshold and the indoor temperature of the unfreezing accommodating cavity within the running time so as to enable the heat exchanger to be connected with the heat conveying channel or the cold conveying channel;
and after the operation is finished, controlling the unfreezing accommodating cavity to enter the next unfreezing function operation stage.
2. The refrigerator according to claim 1, wherein the controlling the flow direction of the flow reversing valve according to the comparison relationship between the target temperature threshold and the indoor temperature of the defrosting accommodating chamber during the operation period specifically comprises:
after entering the current defrosting function operation stage, if the indoor temperature of the defrosting accommodating cavity is smaller than the target temperature threshold, controlling the initial flow direction of the flow reversing valve to be a first flow direction so as to connect the heat exchanger with the heat conveying channel; if the indoor temperature of the unfreezing accommodating cavity is larger than the target temperature threshold value, controlling the initial flow direction of the flow reversing valve to be a second flow direction so as to connect the heat exchanger with the cold energy conveying channel;
after the initial flow direction of the flow reversing valve is controlled, in the running time, when the difference value between the indoor temperature of the unfreezing accommodating cavity and the target temperature threshold is smaller than a first temperature difference threshold or larger than a second temperature difference threshold, the flow reversing valve is controlled to switch the flow direction; wherein the first temperature difference threshold is less than the second temperature difference threshold.
3. The refrigerator of claim 2 wherein the first temperature difference threshold is less than 0 and the second temperature difference threshold is greater than 0.
4. The refrigerator of claim 2, wherein the refrigerator comprises a condenser and an evaporator; the heat conveying channel is a refrigerant conveying channel passing through the condenser, and the cold conveying channel is a refrigerant conveying channel passing through the evaporator;
when the flow reversing valve is switched to a first flow direction, the input end of the heat exchanger is communicated with the input end of the condenser, and the output end of the heat exchanger is communicated with the output end of the condenser;
when the flow reversing valve is switched to the second flow direction, the input end of the heat exchanger is communicated with the input end of the evaporator, and the output end of the heat exchanger is communicated with the output end of the evaporator.
5. The refrigerator as claimed in claim 1, wherein the thawing function operating stage is divided into a freezing stage, a thawing stage and a refreshing stage in order; the preset target temperature threshold corresponding to the freezing stage is smaller than the preset target temperature threshold corresponding to the fresh-keeping stage, and the preset target temperature threshold corresponding to the fresh-keeping stage is smaller than the preset target temperature threshold corresponding to the thawing stage.
6. The refrigerator of claim 1, further comprising a flow control valve, wherein the input of the heat exchanger is connected to the flow reversing valve through the flow control valve, and wherein the flow control valve is configured to control the amount of flow through the heat exchanger.
7. The refrigerator of claim 6, wherein the controller is further coupled to the flow control valve, the controller further configured to:
controlling the opening degree of the flow control valve according to the difference between the indoor temperature and the target temperature threshold;
when the heat exchanger is connected with a heat conveying channel of a refrigerator, the smaller the difference between the indoor temperature and the target temperature threshold value is, the larger the opening degree of the flow control valve is; when the heat exchanger is connected with a cold energy conveying channel of the refrigerator, the larger the difference between the indoor temperature and the target temperature threshold value is, the larger the opening degree of the flow control valve is.
8. The refrigerator of claim 1, wherein the refrigerator further comprises a human-machine interaction module;
the human-computer interaction module is used for receiving a thawing function starting instruction input by a user, and setting the running time and the target temperature threshold of each thawing function running stage.
9. The refrigerator of claim 8, wherein the human-machine interaction module is further configured to: and after the last unfreezing function operation phase is finished, executing preset information pushing operation.
10. An operation control method of a defrosting function of a refrigerator, the refrigerator comprising: the device comprises a thawing accommodating cavity, a temperature collector, a heat exchanger and a flow reversing valve;
the thawing accommodation cavity is arranged in the refrigerator body of the refrigerator and is used for storing food materials; the temperature collector and the heat exchanger are arranged in the unfreezing accommodating cavity;
the temperature collector is used for collecting the indoor temperature of the current unfreezing accommodating cavity;
the heat exchanger is connected with a heat conveying channel of the refrigerator through the flow reversing valve to provide heat for the unfreezing accommodating cavity, or is connected with a cold conveying channel of the refrigerator to provide cold for the unfreezing accommodating cavity;
the method comprises the following steps:
responding to a preset unfreezing function starting instruction, and controlling the unfreezing accommodating cavity to enter a first unfreezing function operation stage;
acquiring a preset operation duration and a target temperature threshold corresponding to a current unfreezing function operation stage;
acquiring the indoor temperature of the unfreezing accommodating cavity acquired by the temperature acquisition device;
controlling the flow direction of the flow reversing valve according to the comparison relation between the target temperature threshold and the indoor temperature of the unfreezing accommodating cavity within the running time so as to enable the heat exchanger to be connected with the heat conveying channel or the cold conveying channel;
and after the operation is finished, controlling the unfreezing accommodating cavity to enter the next unfreezing function operation stage.
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Address after: 528300 No. 8, Rong Gang Road, Ronggui street, Shunde District, Foshan, Guangdong. Applicant after: HISENSE HOME APPLIANCE GROUP Co.,Ltd. Applicant after: Hisense refrigerator Co.,Ltd. Address before: 528300 No. 8, Rong Gang Road, Ronggui street, Shunde District, Foshan, Guangdong. Applicant before: HISENSE HOME APPLIANCE GROUP Co.,Ltd. Applicant before: HISENSE (SHANDONG) REFRIGERATOR Co.,Ltd. |
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