Refrigerator and unfreezing control method thereof

Abstract

The invention provides a refrigerator and an unfreezing control method thereof. The refrigerator comprises a refrigerator body and a refrigerating system, an unfreezing chamber for containing food materials is formed in the refrigerator body, the refrigerating system comprises a compressor, a condenser, an evaporator and a heat exchanger, the heat exchanger is connected with the condenser in parallel and used for exchanging heat with the unfreezing chamber, and the unfreezing control method comprises the steps that the internal temperature of the unfreezing chamber is obtained; if the internal temperature of the unfreezing chamber is smaller than or equal to the preset starting point temperature, the running state of a compressor is obtained; if the compressor is in the working state, part of refrigerant flowing out of the compressor is controlled to flow into the evaporator through the heat exchanger. The unfreezing device has the advantages that in the working process of the compressor, the heat exchanger is used for heating the unfreezing chamber, the heating speed is increased, and the unfreezing time is shortened.

Description

Technical Field

[0001] The present invention relates to the technical field of food thawing, and in particular to a refrigerator and a thawing control method thereof. Background Art

[0002] At present, the method for thawing food is usually to thaw naturally at room temperature or to thaw by soaking in tap water. However, the above thawing method takes a long time, and the food is prone to breeding bacteria during the thawing process, resulting in poor preservation quality of the thawed food.

[0003] Existing refrigerators on the market usually do not have a defrosting function, and users often need to use other heating equipment when heating and thawing, and the heating speed is relatively slow. Some refrigerators also have a defrosting function, but their heating and thawing performance is not good, so there is still room for improvement. Summary of the invention

[0004] The object of the present invention is to solve at least one of the above-mentioned defects in the prior art and to provide a refrigerator and a thawing control method thereof.

[0005] A further object of the present invention is to reasonably control the rotation speed of the compressor to avoid the influence of the operation of the heat exchanger on the normal refrigeration of the refrigerator as much as possible.

[0006] In particular, according to a first aspect of the present invention, the present invention provides a thawing control method for a refrigerator, the refrigerator comprising a box and a refrigeration system, a thawing compartment for placing food is formed in the box, the refrigeration system comprises a compressor, a condenser, an evaporator and a heat exchanger, wherein the heat exchanger is connected in parallel with the condenser for exchanging heat with the thawing compartment, the thawing control method comprising:

[0007] Obtaining the internal temperature of the thawing compartment;

[0008] If the internal temperature of the thawing compartment is less than or equal to the preset start-up point temperature, the operating state of the compressor is obtained;

[0009] If the compressor is in working state, part of the refrigerant flowing out of the compressor is controlled to flow into the evaporator through the heat exchanger.

[0010] Optionally, the thawing chamber is provided with a heating component, and after the step of obtaining the operating state of the compressor, the method further comprises:

[0011] If the compressor is in a shut-down state, the heating component is started to adjust the internal temperature of the thawing compartment by using the heating component.

[0012] Optionally, in the step of controlling part of the refrigerant flowing out of the compressor to flow into the evaporator through the heat exchanger, the step further includes:

[0013] If the compressor meets the shutdown condition, shut down the compressor;

[0014] The heating component is started, and the internal temperature of the thawing compartment is continuously adjusted by the heating component.

[0015] Optionally, before the step of starting the heating component, the method further comprises:

[0016] Determining whether the compressor meets the starting condition within a preset time period;

[0017] If yes, start the compressor after the compressor meets the starting conditions;

[0018] A portion of the refrigerant flowing out of the compressor is controlled to flow into the evaporator through the heat exchanger.

[0019] Optionally, in the step of controlling part of the refrigerant flowing out of the compressor to flow into the evaporator through the heat exchanger, the step further includes:

[0020] The speed of the compressor is increased.

[0021] Optionally, the refrigeration system further includes a regulating valve, which is arranged at the exhaust end of the compressor and is used to control the conduction state between the compressor and the condenser and the heat exchanger. The step of controlling part of the refrigerant flowing out of the compressor to flow into the evaporator through the heat exchanger includes:

[0022] The regulating valve is controlled to connect the compressor to the condenser and the heat exchanger respectively.

[0023] Optionally, the refrigeration system further includes a check valve, which is arranged at the outlet end of the heat exchanger, and the step of controlling part of the refrigerant flowing out of the compressor to flow into the evaporator through the heat exchanger further includes:

[0024] Open the check valve.

[0025] Optionally, after the step of controlling part of the refrigerant flowing out of the compressor to flow into the evaporator through the heat exchanger, the method further includes:

[0026] Obtaining the internal temperature of the thawing compartment;

[0027] If the internal temperature of the thawing compartment is greater than or equal to the preset shutdown point temperature, all the refrigerant flowing out of the compressor is controlled to flow into the evaporator through the condenser.

[0028] According to a second aspect of the present invention, the present invention provides a refrigerator, comprising:

[0029] A box body, in which a thawing chamber for placing food is formed;

[0030] A refrigeration system comprising a compressor, a condenser, an evaporator and a heat exchanger, wherein the heat exchanger is connected in parallel with the condenser for exchanging heat with the thawing compartment; and

[0031] The controller comprises a memory and a processor, wherein the memory stores a machine executable program, and when the machine executable program is executed by the processor, it is used to implement any one of the above-mentioned thawing control methods.

[0032] Optionally, a storage compartment is formed in the box;

[0033] The refrigerator further comprises: a thawing device, which is arranged in the storage compartment and comprises a thawing box, wherein the thawing compartment is defined in the thawing box.

[0034] The refrigerator and thawing control method of the present invention can obtain the running state of the compressor first when the thawing chamber needs to be heated. If the compressor is found to be in working state, part of the refrigerant flowing out of the compressor is controlled to flow into the evaporator through the heat exchanger. In this way, the heat exchanger can be used to exchange heat with the thawing chamber, thereby quickly increasing the internal temperature of the thawing chamber, which is conducive to shortening the thawing time and significantly improving the heating and thawing effect of food.

[0035] Furthermore, in the refrigerator and the defrosting control method thereof of the present invention, in the process of heating the defrosting chamber by using the heat exchanger, part of the refrigerant will flow into the evaporator through the heat exchanger, so that the amount of refrigerant flowing through the condenser per unit time is reduced, and the refrigeration efficiency of the refrigerator is reduced. Therefore, in the process of controlling part of the refrigerant flowing out of the compressor to flow into the evaporator through the heat exchanger, the speed of the compressor can be increased to improve the refrigeration capacity, so as to avoid the influence of the heat exchanger operation on the normal refrigeration of the refrigerator.

[0036] Based on the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will become more aware of the above and other objects, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0038] Figure 1 is a schematic structural diagram of a refrigerator according to an embodiment of the present invention;

[0039] Figure 2 is a schematic structural diagram of a thawing device according to an embodiment of the present invention;

[0040] Figure 3 is a schematic structural diagram of a refrigeration system according to an embodiment of the present invention;

[0041] Figure 4 is a schematic block diagram of a refrigerator according to an embodiment of the present invention;

[0042] Figure 5 Schematic diagram of a refrigerator thawing control method according to an embodiment of the present invention.

[0043] Figure numerals: 10, refrigerator; 100, box body; 110, storage compartment; 200, thawing device; 210, thawing box; 211, thawing compartment; 212, tray; 220, flow promotion component; 230, heating component; 240, humidification component; 241, water storage box; 242, atomizing head; 243, heating wire; 300, refrigeration system; 310, compressor; 320, condenser; 330, evaporator; 340, drying filter; 350, capillary; 360, heat exchanger; 370, regulating valve; 380, check valve; 400, controller; 410, processor; 420, memory; 421, machine executable program. DETAILED DESCRIPTION

[0044] Reference will now be made in detail to embodiments of the present invention, one or more examples of which are illustrated in the accompanying drawings. The various embodiments provided are intended to explain the present invention, not to limit the present invention. In fact, it will be apparent to those skilled in the art that various modifications and variations may be made to the present invention without departing from the scope or spirit of the present invention. For example, a feature illustrated or described as a part of one embodiment may be used together with another embodiment to produce yet another embodiment. Therefore, the present invention is intended to cover such modifications and variations within the scope of the appended claims and their equivalents.

[0045] Refer to the following Figures 1 to 5 The refrigerator 10 and the defrosting control method thereof according to the embodiment of the present invention are described. The directions or positional relationships indicated by "upper", "lower", "top", "bottom", "inside", "outside", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. To facilitate the illustration of the structure of the device, some of the drawings of the present invention are illustrated in perspective.

[0046] In the description of this embodiment, it should be understood that the term "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined. When a feature "includes or contains" one or some of the features it covers, unless otherwise specifically described, this indicates that other features are not excluded and may further include other features.

[0047] In the description of the present embodiment, the description with reference to the terms "one embodiment", "some embodiments", "some examples", "an example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0048] In one aspect, the present invention provides a refrigerator 10, Figure 1 1 is a schematic structural diagram of a refrigerator 10 according to an embodiment of the present invention. The refrigerator 10 of this embodiment should be understood in a broad sense. For example, it can be a storage device with a fresh-keeping function such as a refrigerator 10, a freezer, or a refrigerator.

[0049] The refrigerator 10 may generally include a box body 100 and a door body (not shown in the figure), and one or more storage compartments 110 are defined in the box body 100. The storage compartments 110 may be configured as a refrigeration compartment, a freezing compartment, or a variable temperature compartment according to the refrigeration temperature. The number of the door bodies may correspond to the number of the storage compartments 110, and each door body is used to open and close each storage compartment 110.

[0050] In one example, there are three storage compartments 110, which are a refrigeration compartment, a variable temperature compartment, and a freezer compartment from top to bottom. Of course, the number, function, layout, etc. of the storage compartments 110 can be configured in a targeted manner according to actual needs, and the embodiment of the present invention does not limit this.

[0051] The refrigerator 10 may further include a thawing device 200. The thawing device 200 may be disposed in a storage compartment 110, such as a refrigerating compartment. The refrigerating compartment may provide a low-temperature use environment for the thawing device 200 to reduce bacterial growth.

[0052] A thawing chamber 211 is formed in the thawing device 200, and the food to be thawed can be placed in the thawing chamber 211. When the thawing device 200 is started, the thawing device 200 can generate a thawing airflow in its thawing chamber 211, and continuously exchange heat with the food by using the thawing airflow, so as to quickly thaw the food.

[0053] In a typical embodiment, the thawing device 200 includes a thawing box 210 , a flow promotion component 220 , a heating component 230 and a humidification component 240 .

[0054] The thawing chamber 211 is formed inside the thawing box 210, and the flow promoting component 220, the heating component 230 and the humidifying component 240 are all arranged in the thawing chamber 211. The thawing chamber 211 defines a thawing area, which can be located at the bottom of the thawing chamber 211, or a shelf is provided in the thawing chamber 211, and the thawing area is located on the shelf.

[0055] The flow promoting assembly 220 may include an axial flow fan, which may be arranged toward the thawing area to generate a thawing airflow. By further optimizing the internal structure of the thawing chamber 211, the thawing airflow may be allowed to circulate through the food. This helps to improve the flow smoothness of the thawing airflow, speed up the heat exchange rate between the thawing airflow and the food, and shorten the thawing time.

[0056] The heating assembly 230 may include a heating pipe, which may be disposed on the air supply path between the flow promotion assembly 220 and the thawing area, and is used to heat the thawing airflow so that the airflow temperature of the thawing airflow is controlled within a preset range to ensure heat exchange efficiency and prevent the surface of the food from being cooked due to the thawing airflow being too high. In order to alleviate the heating pipe from obstructing the flow of the thawing airflow, the heating pipe may be bent into a ring shape to allow the thawing airflow to pass smoothly.

[0057] The humidification component 240 may include a water storage box 241 and an atomization head 242. The water storage box 241 is mainly used to store humidification water. The atomization head 242 may be a superconducting ceramic oscillator, which is connected to the inside of the water storage box 241 to convert the humidification water into a humidification airflow and supply it to the thawing chamber 211, thereby adjusting the internal humidity of the thawing chamber 211, preventing the surface of the food from being dried by air, and performing latent heat thawing on the food to improve the thawing effect of the food. Further, the humidification component 240 may also include a heating wire 243, which is arranged in the water storage box 241 and is used to adjust the temperature of the humidification water.

[0058] Of course, the above examples are merely illustrative. Based on the understanding of the above embodiments, those skilled in the art should be able to easily expand and transform the thawing device 200 of this embodiment, such as using other types of flow promotion components 220, heating components 230 and humidification components 240, or arranging one or more of the flow promotion components 220, heating components 230 and humidification components 240 outside the thawing chamber 211, etc.

[0059] It should be noted that the airflow parameters of the thawing airflow may include airflow temperature, airflow humidity, and airflow speed, etc. Among them, the airflow temperature can be controlled by adjusting the power of the heating tube, the airflow humidity can be controlled by adjusting the power of the atomizing head 242, and the airflow speed can be controlled by adjusting the power of the axial flow fan.

[0060] In one example, the air flow temperature of the thawing air flow blown to the thawing area may be 15° C. to 25° C., the air flow humidity may be 70% to 90%, and the air flow speed may be 1.0 m / s to 2.5 m / s.

[0061] In this embodiment, to ensure the thawing effect, before starting the atomizing head 242, the temperature of the humidification water can be heated to 20°C by the heating wire 243 to prevent the humidified airflow from lowering the internal temperature of the thawing chamber 211. To achieve a better thawing effect, the user should place the food in the designated thawing area for thawing.

[0062] In an optional embodiment, the thawing box 210 has an insulation layer to isolate the temperature difference and improve the heating rate and insulation capacity of the thawing chamber 211. During the thawing process, the temperature of the refrigerating chamber is basically not affected by the temperature of the thawing chamber 211, which is conducive to the normal refrigeration and preservation of other food in the refrigerating chamber.

[0063] To prevent food contamination, a tray 212 may be provided in the thawing chamber 211. The tray 212 may be fence-like and have a plurality of drainage holes. The thawed water generated during the thawing of the food may flow out through the drainage holes to prevent the thawed water from soaking the food, while increasing the contact area with the thawing airflow and the humidifying airflow.

[0064] The refrigerator 10 may further include a refrigeration system 300 for supplying cold air to each storage compartment 110 (refrigerating compartment, freezing compartment and variable temperature compartment) of the refrigerator 10 to maintain the internal temperature of each storage compartment 110 (refrigerating compartment, freezing compartment and variable temperature compartment).

[0065] Specifically, the refrigeration system 300 may include a compressor 310, a condenser 320, and an evaporator 330, which are sequentially connected through a refrigerant pipeline to form a circulation loop. The refrigeration system 300 may also include a drying filter 340, a capillary tube 350, etc. Since the above structure and use principle of the refrigeration system 300 are well known to those skilled in the art, they will not be described here.

[0066] In particular, the refrigeration system 300 further includes a heat exchanger 360, which is arranged in parallel with the condenser 320 and can be arranged in the thawing chamber 211 for exchanging heat with the thawing chamber 211. A regulating valve 370 is provided at the exhaust end of the compressor 310, and the regulating valve 370 has a refrigerant inlet connected to the exhaust end of the compressor 310, a first refrigerant outlet connected to the inlet end of the condenser 320, and a second refrigerant outlet connected to the inlet end of the heat exchanger 360.

[0067] During the operation of the compressor 310, the refrigerant inlet of the regulating valve 370 can be connected to the first refrigerant outlet and the second refrigerant outlet respectively, so that part of the refrigerant flows into the evaporator 330 through the heat exchanger 360. In this way, the heat exchanger 360 can quickly adjust the internal temperature of the thawing chamber 211 by exchanging heat with the thawing chamber 211.

[0068] Furthermore, a check valve 380 is provided at the outlet end of the heat exchanger 360. When the refrigerator 10 is in a normal refrigeration state and does not need to heat the thawing chamber 211, the check valve 380 can be closed to prevent the refrigerant flowing out of the condenser 320 from flowing back to the heat exchanger 360, thereby avoiding heating the thawing chamber 211 and improving the reliability of use.

[0069] In an alternative embodiment, the thawing chamber 211 may be directly formed in the box body 100 of the refrigerator 10, the thawing device 200 has no thawing box 210, and its flow promotion component 220, heating component 230 and humidification component 240 are directly arranged in the thawing chamber 211, and the heat exchanger 360 is also directly arranged in the thawing chamber 211. However, it should be noted that during the thawing period, the refrigeration system 300 should not supply cold energy to the thawing chamber 211 to ensure smooth thawing work.

[0070] Figure 4 is a schematic block diagram of a refrigerator 10 according to one embodiment of the present invention.

[0071] like Figure 4 As shown, the refrigerator 10 of the embodiment of the present invention further includes a controller 400. The controller 400 includes a processor 410 and a memory 420. The memory 420 stores a machine executable program 421. When the machine executable program 421 is executed by the processor 410, it is used to implement the defrosting control method in any of the following embodiments.

[0072] The memory 420 may include a memory and a non-volatile memory 420 (non-volatile memory), and provide execution instructions and data to the processor 410. Exemplarily, the memory may be a high-speed random access memory 420 (Random-Access Memory, RAM), and the non-volatile memory 420 may be at least one disk memory 420.

[0073] In this embodiment, the processor 410 is an integrated circuit chip that has the ability to process signals. The processor 410 can be a general-purpose processor 410, such as a central processing unit 410 (CPU), a network processor 410 (NP), a digital signal processor 410 (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, microprocessors 410, and any other conventional processors 410.

[0074] Another aspect of the present invention provides a thawing control method for a refrigerator 10 .

[0075] Figure 5 is a schematic diagram of a defrosting control method of a refrigerator 10 according to an embodiment of the present invention.

[0076] like Figure 5 As shown, the defrosting control method of the refrigerator 10 according to the embodiment of the present invention may generally include:

[0077] Step S502, obtaining the internal temperature of the thawing chamber 211.

[0078] In this step, the internal temperature of the thawing compartment 211 can be measured by a compartment temperature detection device (such as an ambient temperature sensor). Due to the influence of the thawing airflow, the internal temperature of the thawing compartment 211 may not be uniform.

[0079] Therefore, the ambient temperature sensor can be arranged at the top corner of the thawing chamber 211, so that the measurement result is more representative.

[0080] Step S504, determining whether the internal temperature of the thawing chamber 211 is less than or equal to a preset start-up point temperature, if so, executing step S506.

[0081] In this step, when the internal temperature of the thawing chamber 211 is lower than the preset start-up point temperature, the temperature of the thawing airflow is low, and its heat exchange efficiency with the food is poor. The inside of the thawing chamber 211 needs to be heated to ensure the thawing effect of the food.

[0082] Step S506, obtaining the operating status of the compressor 310.

[0083] In this step, the operating state of the compressor 310 includes a working state and a shutdown state, which can be easily determined by detecting the rotation speed of the compressor 310 or the pipeline pressure at the exhaust end and the intake end of the compressor 310.

[0084] Step S508, determining whether the compressor 310 is in working state, if so, executing step S510.

[0085] Step S510 , controlling part of the refrigerant flowing out of the compressor 310 to flow into the evaporator 330 through the heat exchanger 360 .

[0086] According to the thawing control method of the refrigerator 10 of the present invention, when the thawing chamber 211 needs to be heated, the operating state of the compressor 310 can be obtained first. If the compressor 310 is found to be in the working state, part of the refrigerant flowing out of the compressor 310 is controlled to flow into the evaporator 330 through the heat exchanger 360. In this way, the heat exchanger 360 can be used to exchange heat with the thawing chamber 211, so as to quickly increase the internal temperature of the thawing chamber 211, which is conducive to shortening the thawing time and significantly improving the heating and thawing effect of the food.

[0087] After obtaining the operating status of the compressor 310, if it is found that the compressor 310 is in a shut-down state and the heat exchanger 360 cannot be used to heat the thawing chamber 211, the heating component 230 can be started at this time, and the internal temperature of the thawing chamber 211 can be adjusted by the heating component 230 to ensure the smooth progress of the thawing work.

[0088] In an optional embodiment, in the process of controlling part of the refrigerant flowing out of the compressor 310 to flow into the evaporator 330 through the heat exchanger 360, if the compressor 310 meets the shutdown condition, the compressor 310 is turned off, and then the heating component 230 is started, and the internal temperature of the thawing chamber 211 is continued to be adjusted by the heating component 230.

[0089] It can be understood that the main function of the refrigeration system 300 is to supply cold air to each storage compartment 110 (refrigerating compartment, freezing compartment and variable temperature compartment). When the internal temperature of the storage compartment 110 meets the requirements, the compressor 310 will automatically shut down. Therefore, in the process of heating the thawing compartment 211 by using the heat exchanger 360, if the compressor 310 meets the shutdown condition, the compressor 310 must be shut down to prevent the compressor 310 from continuing to work and causing the temperature of each storage compartment 110 (refrigerating compartment, freezing compartment and variable temperature compartment) to be too low, affecting the normal storage performance of the refrigerator 10.

[0090] Since the compressor 310 has not completed the heating work of the thawing chamber 211 when it is shut down, the heating component 230 can be started at this time to complete the subsequent heating work by using the heating component 230. During the operation of the heating component 230, although the compressor 310 is shut down and the refrigerant no longer flows, the refrigerant in the heat exchanger 360 still has residual heat, which can also play a certain heating role on the thawing chamber 211. Compared with using the heating component 230 alone to heat the thawing chamber 211, the heating speed of using the residual heat of the heat exchanger 360 and the heating component 230 together is faster.

[0091] In an optional embodiment, before starting the heating component 230, it is also possible to determine whether the compressor 310 meets the starting conditions within a preset time period. If the judgment result is yes, after the compressor 310 meets the starting conditions, the compressor 310 is started, and part of the refrigerant flowing out of the compressor 310 is controlled to flow into the evaporator 330 through the heat exchanger 360.

[0092] The purpose of judging whether the compressor 310 meets the start-up condition within the preset time is to judge whether the compressor 310 is about to start. If it is found that the compressor 310 is about to start, the heat exchanger 360 can be used to heat the thawing chamber 211 after the compressor 310 starts. In other words, since the heat exchanger 360 heats the thawing chamber 211 at a faster speed, the heat exchanger 360 should be used more to heat the thawing chamber 211, thereby shortening the thawing time of the food and avoiding the user from waiting for a long time, which is conducive to improving the user's experience.

[0093] In the process of heating the thawing chamber 211 by the heat exchanger 360, part of the refrigerant will flow into the evaporator 330 through the heat exchanger 360, so that the amount of refrigerant flowing through the condenser 320 per unit time is reduced, and the refrigeration efficiency of the refrigerator 10 is reduced. Therefore, in the process of controlling part of the refrigerant flowing out of the compressor 310 to flow into the evaporator 330 through the heat exchanger 360, the speed of the compressor 310 can also be increased to increase the refrigeration capacity, so that the refrigerator 10 can cool the thawing chamber 211 while avoiding the influence of the operation of the heat exchanger 360 on the normal refrigeration of the refrigerator 10.

[0094] In an embodiment of the present invention, a regulating valve 370 is provided at the exhaust end of the compressor 310. When it is necessary to allow part of the refrigerant flowing out of the compressor 310 to flow into the evaporator 330 through the heat exchanger 360, the regulating valve 370 can be controlled to connect the compressor 310 to the condenser 320 and the heat exchanger 360 respectively.

[0095] Furthermore, since a check valve 380 is also provided at the outlet end of the heat exchanger 360 , when the compressor 310 and the heat exchanger 360 are connected, the check valve 380 should also be opened so that the refrigerant can flow smoothly into the evaporator 330 .

[0096] When the refrigerator 10 is in a normal refrigeration state and there is no need to heat the thawing chamber 211, the check valve 380 should be closed to prevent the refrigerant flowing out of the condenser 320 from flowing back to the heat exchanger 360, thereby avoiding heating of the thawing chamber 211 and improving the reliability of use.

[0097] In the process of heating the thawing chamber 211 using the heat exchanger 360, the internal temperature of the thawing chamber 211 can also be obtained. If it is found that the internal temperature of the thawing chamber 211 is greater than or equal to the preset shutdown point temperature, all the refrigerant flowing out of the compressor 310 can be controlled to flow into the evaporator 330 through the condenser 320.

[0098] Specifically, the step of controlling all the refrigerant flowing out of the compressor 310 to flow into the evaporator 330 through the condenser 320 can be to control the regulating valve 370 to make the compressor 310 only connected to the condenser 320, close the check valve 380, and if the speed of the compressor 310 is increased during this period, the speed of the compressor 310 should also be restored to the initial speed.

[0099] It can be understood that when the internal temperature of the thawing chamber 211 is too low, the heat exchange efficiency between the thawing airflow and the food is poor, and the thawing speed is slow. When the internal temperature of the thawing chamber 211 is too high, the thawing airflow is easy to produce a ripening effect on the surface of the food, affecting the thawing quality of the food. In this embodiment, the preset start-up point temperature can be 15°C and the preset shutdown point temperature can be 25°C. Of course, in actual applications, the preset start-up point temperature and the preset shutdown point temperature can also be set in a targeted manner in combination with actual conditions.

[0100] At this point, those skilled in the art should recognize that, although multiple exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications that conform to the principles of the present invention can still be directly determined or derived based on the content disclosed in the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all these other variations or modifications.

Claims

1. A thawing control method for a refrigerator, the refrigerator comprising a box and a refrigeration system, the box having a thawing compartment for placing food, the refrigeration system comprising a compressor, a condenser, an evaporator and a heat exchanger, wherein: The heat exchanger is connected in parallel with the condenser and is used for exchanging heat with the thawing compartment. The thawing control method includes: Obtaining the internal temperature of the thawing compartment; If the internal temperature of the thawing compartment is less than or equal to the preset start-up point temperature, the operating state of the compressor is obtained; If the compressor is in working state, part of the refrigerant flowing out of the compressor is controlled to flow into the evaporator through the heat exchanger.

2. The thawing control method according to claim 1, wherein: The thawing chamber is provided with a heating component, and after the step of obtaining the operating state of the compressor, the method further comprises: If the compressor is in a shut-down state, the heating component is started to adjust the internal temperature of the thawing compartment by using the heating component.

3. The thawing control method according to claim 2, wherein: The step of controlling part of the refrigerant flowing out of the compressor to flow into the evaporator through the heat exchanger further includes: If the compressor meets the shutdown condition, shut down the compressor; The heating component is started, and the internal temperature of the thawing compartment is continuously adjusted by the heating component.

4. The thawing control method according to claim 2, wherein: Before the step of starting the heating component, the method further comprises: Determining whether the compressor meets the starting condition within a preset time period; If yes, start the compressor after the compressor meets the starting conditions; A portion of the refrigerant flowing out of the compressor is controlled to flow into the evaporator through the heat exchanger.

5. The thawing control method according to claim 1, wherein: The step of controlling part of the refrigerant flowing out of the compressor to flow into the evaporator through the heat exchanger further includes: The speed of the compressor is increased.

6. The thawing control method according to claim 2, wherein: The refrigeration system further includes a regulating valve, which is arranged at the exhaust end of the compressor and is used to control the conduction state between the compressor and the condenser and the heat exchanger. The step of controlling part of the refrigerant flowing out of the compressor to flow into the evaporator through the heat exchanger includes: The regulating valve is controlled to connect the compressor to the condenser and the heat exchanger respectively.

7. The thawing control method according to claim 1, wherein: The refrigeration system further includes a check valve, which is arranged at the outlet end of the heat exchanger, and the step of controlling part of the refrigerant flowing out of the compressor to flow into the evaporator through the heat exchanger also includes: Open the check valve.

8. The thawing control method according to claim 1, wherein: After the step of controlling part of the refrigerant flowing out of the compressor to flow into the evaporator through the heat exchanger, the method further includes: Obtaining the internal temperature of the thawing compartment; If the internal temperature of the thawing compartment is greater than or equal to the preset shutdown point temperature, all the refrigerant flowing out of the compressor is controlled to flow into the evaporator through the condenser.

9. A refrigerator, comprising: A box body, in which a thawing chamber for placing food is formed; A refrigeration system comprising a compressor, a condenser, an evaporator and a heat exchanger, wherein the heat exchanger is connected in parallel with the condenser and is used for exchanging heat with the thawing compartment; as well as A controller comprises a memory and a processor, wherein the memory stores a machine executable program, and when the machine executable program is executed by the processor, it is used to implement the thawing control method according to any one of claims 1-8.

10. The refrigerator according to claim 9, wherein: A storage compartment is formed in the box; The refrigerator further comprises: a thawing device, which is arranged in the storage compartment and comprises a thawing box, wherein the thawing compartment is defined in the thawing box.

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