A control method and device of a refrigerator and a refrigerator

Abstract

The application relates to a refrigerator control method and device and a refrigerator. The method comprises the following steps: when the ambient temperature of the refrigerator is less than the set temperature of the refrigerating chamber of the refrigerator, the current temperature of the refrigerating chamber is less than a preset first temperature threshold, and the refrigeration demand of the freezing chamber of the refrigerator exists, heating the refrigerating chamber of the refrigerator by controlling the expansion valve, the condensing fan and the refrigerating fan until the current temperature of the refrigerating chamber of the refrigerator is greater than a preset second temperature threshold; the preset first temperature threshold is the pre-set start-up temperature of the refrigerating chamber heating; the preset second temperature threshold is the pre-set shutdown temperature of the refrigerating chamber heating; the preset first temperature threshold is less than the set temperature of the refrigerating chamber; and the preset second temperature threshold is greater than the set temperature of the refrigerating chamber. The method can solve the problem that the existing refrigerator control method cannot heat the refrigerating chamber, and the food in the refrigerating chamber is frozen when the room temperature is too low.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of refrigeration and freezing, and in particular to a refrigerator control method and device and a refrigerator. BACKGROUND

[0002] With the development of electronic technology, the refrigeration and freezing technology has also been rapidly developed. As a kind of household refrigeration and freezing equipment, the refrigerator has gradually increased requirements with the development of refrigerator technology.

[0003] The refrigerator is provided with a refrigeration chamber and a freezing chamber. The refrigeration chamber is used to store food that does not need to be frozen, such as vegetables, fruits, dairy products, etc. Generally, in order to ensure the freshness of the food in the refrigeration chamber, the temperature of the refrigeration chamber needs to be maintained at 2-4℃. When the room temperature is higher than the set temperature of the refrigeration chamber, the refrigerator controls the temperature of the refrigeration chamber by refrigerating the refrigeration chamber. However, when the room temperature is too low, even lower than 0℃, after the refrigerator door is opened and closed, the air in the refrigeration chamber will be too low due to the interaction with the room temperature, which may freeze the food in the refrigeration chamber.

[0004] However, the existing control method of the refrigerator can only refrigerate the refrigeration chamber, and cannot heat the refrigeration chamber.

[0005] For the existing control method of the refrigerator, because the refrigeration chamber cannot be heated, there is a problem that the food in the refrigeration chamber will be frozen when the room temperature is too low. At present, there is no effective solution to this problem. SUMMARY

[0006] Therefore, it is necessary to provide a refrigerator control method and device and a refrigerator to solve the above technical problems.

[0007] In a first aspect, the present application provides a refrigerator control method. The method comprises the following steps:

[0008] When the ambient temperature of the environment where the refrigerator is located is less than the set temperature of the refrigeration chamber of the refrigerator, and the current temperature of the refrigeration chamber is less than a preset first temperature threshold, and there is a refrigeration demand in the freezing chamber of the refrigerator, the refrigeration chamber of the refrigerator is heated by controlling the opening degree of the expansion valve, the condensing fan and the refrigeration fan of the refrigerator, until the current temperature of the refrigeration chamber of the refrigerator is greater than a preset second temperature threshold; the preset first temperature threshold is a pre-set start-up temperature for refrigeration chamber heating; the preset second temperature threshold is a pre-set shutdown temperature for refrigeration chamber heating; the preset first temperature threshold is less than the set temperature of the refrigeration chamber; and the preset second temperature threshold is greater than the set temperature of the refrigeration chamber.

[0009] In one of the embodiments, when the ambient temperature of the environment where the refrigerator is located is less than the set temperature of the refrigerating chamber of the refrigerator, and the current temperature of the refrigerating chamber is less than the preset first temperature threshold, and the freezing chamber of the refrigerator has a refrigeration demand, the refrigerating chamber of the refrigerator is heated by controlling the opening degree of the expansion valve, the condensing fan and the refrigerating fan of the refrigerator until the current temperature of the refrigerating chamber of the refrigerator is greater than the preset second temperature threshold, including the following steps:

[0010] When the ambient temperature of the environment where the refrigerator is located is less than the set temperature of the refrigerating chamber of the refrigerator, and the current temperature of the refrigerating chamber is less than the preset first temperature threshold, and the freezing chamber of the refrigerator has a refrigeration demand, the refrigerating chamber of the refrigerator is heated by controlling the expansion valve to be fully opened, the condensing fan to be turned off and the refrigerating fan to be turned on until the current temperature of the refrigerating chamber of the refrigerator is greater than the preset second temperature threshold.

[0011] In one of the embodiments, before the refrigerating chamber of the refrigerator is heated by controlling the opening degree of the expansion valve, the condensing fan and the refrigerating fan of the refrigerator when the ambient temperature of the environment where the refrigerator is located is less than the set temperature of the refrigerating chamber of the refrigerator, and the current temperature of the refrigerating chamber is less than the preset first temperature threshold, and the freezing chamber of the refrigerator has a refrigeration demand, until the current temperature of the refrigerating chamber of the refrigerator is greater than the preset second temperature threshold, including the following steps:

[0012] Obtaining the ambient temperature of the environment where the refrigerator is located and the set temperature of the refrigerating chamber of the refrigerator.

[0013] Determining the size between the ambient temperature of the environment where the refrigerator is located and the set temperature of the refrigerating chamber of the refrigerator.

[0014] In one of the embodiments, after the refrigerating chamber of the refrigerator is heated by controlling the opening degree of the expansion valve, the condensing fan and the refrigerating fan of the refrigerator when the ambient temperature of the environment where the refrigerator is located is less than the set temperature of the refrigerating chamber of the refrigerator, and the current temperature of the refrigerating chamber is less than the preset first temperature threshold, and the freezing chamber of the refrigerator has a refrigeration demand, until the current temperature of the refrigerating chamber of the refrigerator is greater than the preset second temperature threshold, including the following steps:

[0015] Turning off the refrigerating fan.

[0016] In one of the embodiments, the control method of the refrigerator further includes the following steps:

[0017] Determining whether the freezing chamber of the refrigerator has a refrigeration demand.

[0018] In the case that the freezing chamber of the refrigerator has a refrigeration demand, the compressor of the refrigerator is started;

[0019] In the case that the freezing chamber of the refrigerator has no refrigeration demand, the compressor of the refrigerator is stopped.

[0020] In one of the embodiments, the control method of the refrigerator further comprises the following steps:

[0021] When the ambient temperature of the environment where the refrigerator is located is greater than or equal to the set temperature of the refrigerating chamber of the refrigerator, it is determined whether the defrosting condition of the refrigerator is met;

[0022] When the defrosting condition of the refrigerator is met and the freezing chamber of the refrigerator has a refrigeration demand, the refrigerating evaporator of the refrigerator is defrosted by controlling the opening degree of the expansion valve, the condensing fan and the refrigerating fan until the defrosting time length meets the preset defrosting time length.

[0023] When the defrosting condition of the refrigerator is not met and the current temperature of the refrigerating chamber is greater than the preset second temperature threshold, in the case that the freezing chamber of the refrigerator has a refrigeration demand, the refrigerating chamber of the refrigerator is refrigerated by controlling the opening degree of the expansion valve, the condensing fan and the refrigerating fan until the current temperature of the refrigerating chamber of the refrigerator is less than the preset first temperature threshold.

[0024] In one of the embodiments, when the defrosting condition of the refrigerator is met and the freezing chamber of the refrigerator has a refrigeration demand, the refrigerating evaporator of the refrigerator is defrosted by controlling the opening degree of the expansion valve, the condensing fan and the refrigerating fan until the defrosting time length meets the preset defrosting time length, comprising the following steps:

[0025] When the defrosting condition of the refrigerator is met and the freezing chamber of the refrigerator has a refrigeration demand, the refrigerating evaporator of the refrigerator is defrosted by controlling the full opening of the expansion valve, the closing of the condensing fan and the closing of the refrigerating fan until the defrosting time length meets the preset defrosting time length.

[0026] In one of the embodiments, when the defrosting condition of the refrigerator is not met and the current temperature of the refrigerating chamber is greater than the preset second temperature threshold, in the case that the freezing chamber of the refrigerator has a refrigeration demand, the refrigerating chamber of the refrigerator is refrigerated by controlling the opening degree of the expansion valve, the condensing fan and the refrigerating fan until the current temperature of the refrigerating chamber of the refrigerator is less than the preset first temperature threshold, comprising the following steps:

[0027] When the refrigerator does not meet the defrosting condition, and the current temperature of the refrigerating chamber is greater than the preset second temperature threshold, in the case that the freezing chamber of the refrigerator has refrigeration demand, the opening degree of the expansion valve is adjusted according to the difference between the ambient temperature of the environment in which the refrigerator is located and the set temperature of the refrigerating chamber, and the condensing fan is controlled to be opened, the refrigerating fan is controlled to be opened, and the refrigerating chamber of the refrigerator is refrigerated until the current temperature of the refrigerating chamber of the refrigerator is less than the preset first temperature threshold, and then the refrigerating fan is closed.

[0028] In a second aspect, the application further provides a control device of a refrigerator. The device comprises:

[0029] The heating module is configured to, when the ambient temperature of the environment in which the refrigerator is located is less than the set temperature of the refrigerating chamber of the refrigerator, and the current temperature of the refrigerating chamber is less than the preset first temperature threshold, in the case that the freezing chamber of the refrigerator has refrigeration demand, control the opening degree of the expansion valve of the refrigerator, the condensing fan and the refrigerating fan to heat the refrigerating chamber of the refrigerator until the current temperature of the refrigerating chamber of the refrigerator is greater than the preset second temperature threshold; the preset first temperature threshold is a pre-set start-up temperature of refrigerating chamber heating; the preset second temperature threshold is a pre-set shutdown temperature of refrigerating chamber heating; the preset first temperature threshold is less than the set temperature of the refrigerating chamber; and the preset second temperature threshold is greater than the set temperature of the refrigerating chamber.

[0030] In a third aspect, the application further provides a refrigerator. The refrigerator comprises a refrigerating chamber, a freezing chamber and a temperature control system, the temperature control system is configured to implement the control method of the refrigerator of the first aspect; and the temperature control system comprises a compressor, a condensing module, an expansion valve, a refrigerating module, a capillary tube, a switching module and a freezing module.

[0031] The compressor is connected to the condensing module and the switching module, and is configured to compress the low-temperature and low-pressure refrigerant received by the switching module into high-temperature and high-pressure refrigerant when the freezing chamber of the refrigerator has refrigeration demand.

[0032] The condensing module comprises a condenser and a condensing fan; the condenser is connected to the compressor and the expansion valve respectively, and is configured to cool the high-temperature and high-pressure refrigerant coming out of the compressor into liquid refrigerant when the condensing fan is opened; and the condensing fan is configured to blow air to the condenser in an opened state.

[0033] The expansion valve is connected to the refrigeration module, and is configured to heat the refrigeration chamber of the refrigerator until the current temperature of the refrigeration chamber of the refrigerator is greater than the second preset temperature threshold when the ambient temperature is less than the set temperature of the refrigeration chamber of the refrigerator, the current temperature of the refrigeration chamber is less than the first preset temperature threshold, and the freezing chamber of the refrigerator has a refrigeration demand; the expansion valve is also configured to defrost the refrigeration evaporator of the refrigerator until the defrosting time length meets a preset defrosting time length when the refrigerator meets the defrosting condition; and the expansion valve is also configured to cool the refrigeration chamber of the refrigerator until the current temperature of the refrigeration chamber of the refrigerator is less than the first preset temperature threshold when the refrigerator does not meet the defrosting condition and the current temperature of the refrigeration chamber of the refrigerator is greater than the second preset temperature threshold.

[0034] The refrigeration module comprises a refrigeration evaporator and a refrigeration fan, the refrigeration evaporator is connected to the expansion valve, the switching module and the capillary tube, and is configured to heat the refrigeration chamber of the refrigerator until the current temperature of the refrigeration chamber of the refrigerator is greater than the second preset temperature threshold when the ambient temperature of the environment where the refrigerator is located is less than the set temperature of the refrigeration chamber of the refrigerator, the current temperature of the refrigeration chamber is less than the first preset temperature threshold, and the freezing chamber of the refrigerator has a refrigeration demand; the refrigeration evaporator is also configured to defrost the refrigeration evaporator of the refrigerator until the defrosting time length meets a preset defrosting time length when the ambient temperature of the environment where the refrigerator is located is greater than or equal to the set temperature of the refrigeration chamber of the refrigerator, the refrigerator meets the defrosting condition, and the freezing chamber of the refrigerator has a refrigeration demand; the refrigeration evaporator is also configured to cool the refrigeration chamber of the refrigerator until the current temperature of the refrigeration chamber of the refrigerator is less than the first preset temperature threshold when the ambient temperature of the environment where the refrigerator is located is greater than or equal to the set temperature of the refrigeration chamber of the refrigerator, the refrigerator does not meet the defrosting condition, the current temperature of the refrigeration chamber is greater than the second preset temperature threshold, and the freezing chamber of the refrigerator has a refrigeration demand; and the refrigeration fan is configured to blow the refrigeration evaporator in an open state.

[0035] The capillary tube is connected to the freezing module, and is configured to throttle the refrigerant flowing out of the refrigeration module to obtain throttled refrigerant.

[0036] The freezing module is connected to the switching module, and is configured to use the throttled refrigerant flowing out of the capillary tube to cool the freezing chamber of the refrigerator.

[0037] The switching module comprises at least one switching valve, and is configured to switch between the refrigerant flowing out of the refrigeration module and the refrigerant flowing out of the freezing module to flow into the compressor based on whether the freezing chamber of the refrigerator has a refrigeration demand.

[0038] The control method and device of the refrigerator and the refrigerator provided by the above-mentioned application consider the relationship between the ambient temperature of the environment where the refrigerator is located and the set temperature of the refrigerating chamber of the refrigerator and the relationship between the current temperature of the refrigerating chamber and the preset first temperature threshold value, and determine whether the refrigerating chamber needs to be heated. When the refrigerating chamber needs to be heated and the freezing chamber of the refrigerator has a refrigeration demand, the refrigerating chamber of the refrigerator is heated by controlling the opening degree of the expansion valve, the condensing fan and the refrigerating fan of the refrigerator. The connection relationship and structure inside the refrigerator do not need to be changed, only the opening degree of the expansion valve, the condensing fan and the refrigerating fan need to be adjusted, which is simple and easy to implement. The control method of the existing refrigerator cannot heat the refrigerating chamber, and the food in the refrigerating chamber is frozen when the room temperature is too low.

[0039] The details of one or more embodiments of the present application are presented in the following drawings and description to make other features, objects and advantages of the present application more apparent. BRIEF DESCRIPTION OF DRAWINGS

[0040] The drawings described herein are intended to provide further understanding of the present application, and constitute a part of the present application. The illustrative embodiments of the present application and their description serve to explain the present application, and do not constitute an improper limitation of the present application. In the drawings:

[0041] Figure 1 The hardware structure block diagram of the terminal of the control method of the refrigerator provided by an embodiment of the present application is shown in the figure;

[0042] Figure 2 The flowchart of the control method of the refrigerator provided by an embodiment of the present application is shown in the figure;

[0043] Figure 3 The flowchart of the control method of the refrigerator provided by a preferred embodiment of the present application is shown in the figure;

[0044] Figure 4 The structure diagram of the temperature control system of the refrigerator provided by an embodiment of the present application is shown in the figure. DETAILED DESCRIPTION

[0045] In order to more clearly understand the purpose, technical scheme and advantages of the present application, the present application is described and explained in combination with the drawings and embodiments.

[0046] Unless otherwise defined, technical terms or scientific terms used in the present application shall have the same meaning as those commonly understood by a person of ordinary skill in the art to which the present application belongs. The terms "one", "a", "an", "the", "these", and similar terms in the present application do not mean "only one" or "exactly one", but can mean "one or more". The terms "include", "contain", "have", and any variant thereof in the present application are intended to cover the non-exclusive inclusion; for example, a process, method, and system, product or device containing a series of steps or modules (units) are not limited to the listed steps or modules (units), but can include steps or modules (units) not listed, or can include other steps or modules (units) inherent to the process, method, product or device. The terms "connect", "connect", "couple" and the like in the present application are not limited to physical or mechanical connection, but can include electrical connection, whether direct or indirect. The term "multiple" in the present application means two or more. The term "and / or" describes the association between the associated objects, which means that there can be three relationships, for example, "A and / or B" can mean that A exists alone, A and B exist together, and B exists alone. Generally, the character " / " represents the relationship between the objects before and after it as "or". The terms "first", "second", "third" and the like in the present application are only used to distinguish similar objects, and do not represent a specific order of the objects.

[0047] The method embodiments provided in the present embodiment can be executed in a terminal, a computer or a similar computing device. For example, the method embodiments are executed on a terminal, Figure 1 is a hardware structure block diagram of a terminal of the control method of the refrigerator of the present embodiment. As shown in Figure 1 , the terminal can include one or more (only one is shown in Figure 1 ) processor 102 and memory 104 for storing data, wherein the processor 102 can include but not limited to processing device such as microprocessor MCU or programmable logic device FPGA. The above terminal can also include transmission device 106 for communication function and input / output device 108. Those skilled in the art can understand that Figure 1 The structure shown is only schematic, which does not limit the structure of the above terminal. For example, the terminal can also include more or less components than Figure 1 shown, or have a different configuration from Figure 1 shown.

[0048] The memory 104 can be used to store computer programs, such as software programs of application software and modules, such as a computer program corresponding to the control method of the refrigerator in the embodiment. The processor 102 can execute various functional applications and data processing, i.e., implement the method described above, by running the computer programs stored in the memory 104. The memory 104 can include a high-speed random access memory, and can further include a non-volatile memory, such as one or more magnetic storage devices, flash memories, or other non-volatile solid-state memories. In some examples, the memory 104 can further include memories disposed remotely with respect to the processor 102, which can be connected to the terminal through a network. Examples of the network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0049] The transmission device 106 is configured to receive or send data via a network. The network includes a wireless network provided by a communication provider of the terminal. In an example, the transmission device 106 includes a network interface controller (NIC) that can be connected to other network devices through a base station to communicate with the Internet. In an example, the transmission device 106 can be a radio frequency (RF) module configured to communicate with the Internet in a wireless manner.

[0050] In the embodiment, a control method of a refrigerator is provided, Figure 2 is a flowchart of the control method of the refrigerator in the embodiment, as Figure 2 shown, the flow includes the following steps:

[0051] In step S210, when the ambient temperature of the environment in which the refrigerator is located is less than the set temperature of the refrigerating chamber of the refrigerator, and the current temperature of the refrigerating chamber is less than a preset first temperature threshold, in the case that there is a refrigeration demand in the freezing chamber of the refrigerator, the refrigerating chamber of the refrigerator is heated by controlling the opening degree of the expansion valve, the condensing fan and the refrigerating fan of the refrigerator until the current temperature of the refrigerating chamber of the refrigerator is greater than a preset second temperature threshold; the preset first temperature threshold is a pre-set start-up temperature for refrigerating chamber heating; the preset second temperature threshold is a pre-set shut-down temperature for refrigerating chamber heating; the preset first temperature threshold is less than the set temperature of the refrigerating chamber; and the preset second temperature threshold is greater than the set temperature of the refrigerating chamber.

[0052] The set temperature of the refrigeration chamber of the refrigerator can be a temperature that needs to be maintained in the refrigeration chamber, which is pre-set by a user according to actual needs by adjusting a temperature controller and a gear switch on the refrigerator. The set temperature of the refrigeration chamber can also be automatically set or generated by an intelligent temperature control system of the refrigerator according to a set temperature range of the refrigeration chamber and other parameters pre-set by the user. The set temperature of the refrigeration chamber is pre-set to keep the temperature of the refrigeration chamber of the refrigerator around the set temperature, so as to achieve the preservation of food in the refrigeration chamber of the refrigerator. Generally, in order to ensure the freshness, taste and safety of food in the refrigeration chamber of the refrigerator, the pre-set temperature of the refrigeration chamber can be adjusted according to the type of food stored in the refrigeration chamber and the ambient temperature of the environment in which the refrigerator is located. For example, in summer, the ambient temperature in which the refrigerator is located is relatively high, and in order to maintain the freshness of food, the set temperature of the refrigeration chamber of the refrigerator can be set to a relatively low value; in winter, the ambient temperature in which the refrigerator is located is relatively low, and the set temperature of the refrigeration chamber of the refrigerator can be set to a relatively high value; for food that needs to be preserved for a long time or is prone to deterioration at high temperatures, such as meat and seafood, the set temperature of the refrigeration chamber of the refrigerator can be set to a relatively low value; for food that needs to be preserved for a short time or is affected by the taste of the food at a low temperature, such as vegetables and fruits, the set temperature of the refrigeration chamber of the refrigerator can be set to a relatively high value. Generally, the set temperature of the refrigeration chamber is set to between 0°C and 8°C.

[0053] In some cases, when the ambient temperature of the environment in which the refrigerator is located is low, if the current temperature of the refrigeration chamber of the refrigerator is also low, the temperature of the refrigeration chamber can be too low to freeze the food in the refrigeration chamber, and in this case, the refrigeration chamber of the refrigerator needs to be heated. Specifically, when the ambient temperature of the environment in which the refrigerator is located is less than the set temperature of the refrigeration chamber of the refrigerator, it can be determined that the ambient temperature of the environment in which the refrigerator is located is low, and the refrigerator can have a heating demand. When the current temperature of the refrigeration chamber is less than a pre-set first temperature threshold, it can be determined that the refrigerator needs heating at this time, but if the freezer of the refrigerator does not have a cooling demand, the compressor does not work at this time, and the heating of the refrigeration chamber of the refrigerator needs to wait until the freezer of the refrigerator has a cooling demand. Because the above-mentioned pre-set first temperature threshold is a further judgment of whether the refrigeration chamber currently needs heating, the pre-set first temperature threshold is less than the set temperature of the refrigeration chamber. The above-mentioned pre-set first temperature threshold can be a pre-set start temperature of the refrigeration chamber heating. It should be noted that, in order to simplify the calculation logic, the temperature value at which the refrigeration chamber stops cooling (shutdown temperature) when the refrigeration chamber is cooling can be used as the pre-set first temperature threshold.

[0054] In this step, the above-mentioned pre-set second temperature threshold can be the shutdown temperature of the refrigeration chamber heating, and in order to simplify the calculation logic, the start temperature of the refrigeration chamber cooling when the refrigeration chamber is cooling can be used as the pre-set second temperature threshold.

[0055] The step S210 judges whether the refrigeration compartment needs to be heated by comprehensively considering the relationship between the ambient temperature of the environment where the refrigerator is located and the set temperature of the refrigeration compartment of the refrigerator and the relationship between the current temperature of the refrigeration compartment and the preset first temperature threshold. When the refrigeration compartment needs to be heated and the freezing compartment of the refrigerator has a refrigeration demand, the refrigeration compartment of the refrigerator is heated by controlling the opening degree of the expansion valve, the condensing fan and the refrigeration fan of the refrigerator. The connection relationship and structure inside the refrigerator do not need to be changed, only the opening degree of the expansion valve, the condensing fan and the refrigeration fan need to be adjusted, which is simple and easy to implement. The existing control method of the refrigerator solves the problem that the food in the refrigeration compartment is frozen when the room temperature is too low because the refrigeration compartment cannot be heated.

[0056] In one embodiment, when the ambient temperature of the environment where the refrigerator is located is less than the set temperature of the refrigeration compartment of the refrigerator, and the current temperature of the refrigeration compartment is less than the preset first temperature threshold, the refrigeration compartment of the refrigerator is heated by controlling the opening degree of the expansion valve, the condensing fan and the refrigeration fan of the refrigerator when the freezing compartment of the refrigerator has a refrigeration demand until the current temperature of the refrigeration compartment of the refrigerator is greater than the preset second temperature threshold.

[0057] Step S212, when the ambient temperature of the environment where the refrigerator is located is less than the set temperature of the refrigeration compartment of the refrigerator, and the current temperature of the refrigeration compartment is less than the preset first temperature threshold, the refrigeration compartment of the refrigerator is heated by controlling the expansion valve to be fully opened, the condensing fan to be turned off and the refrigeration fan to be turned on when the freezing compartment of the refrigerator has a refrigeration demand until the current temperature of the refrigeration compartment of the refrigerator is greater than the preset second temperature threshold.

[0058] When the ambient temperature of the environment where the refrigerator is located is less than the set temperature of the refrigerating chamber of the refrigerator, the main control module of the refrigerator generates a heating instruction, and sends the generated heating instruction to the refrigerating control module of the refrigerator, and the refrigerating control module controls the refrigerating chamber to enter a heating mode. In the heating mode, the refrigerating control module of the refrigerator judges whether the current temperature of the refrigerating chamber is less than a preset first temperature threshold. When the current temperature of the refrigerating chamber is not less than the preset first temperature threshold, the current temperature of the refrigerating chamber is periodically refreshed according to a preset first time period, and it is re-judged whether the current temperature of the refrigerating chamber is less than the preset first temperature threshold. In this process, if it is judged that the current temperature of the refrigerating chamber is greater than the set temperature of the refrigerating chamber of the refrigerator, the main control module of the refrigerator generates a refrigeration instruction, and sends the refrigeration instruction to the refrigerating control module of the refrigerator, and the refrigerating control module controls the refrigerating chamber to enter a refrigeration mode; in this process, if the current temperature of the refrigerating chamber is less than the preset first temperature threshold, the refrigerating control module judges whether the freezing chamber has a refrigeration demand, when the freezing chamber has no refrigeration demand, the current temperature of the refrigerating chamber is periodically refreshed according to a preset second time period, and it is re-judged whether the current temperature of the refrigerating chamber is less than the preset first temperature threshold; when the freezing chamber has a refrigeration demand, the refrigerating chamber is heated by controlling the expansion valve to be fully opened, the condensing fan to be closed and the refrigerating fan to be opened, until the current temperature of the refrigerating chamber is greater than a preset second temperature threshold. The above-mentioned preset first time period can be set according to specific needs, and the embodiment does not make specific limitation here. For example, the preset first time period can be set to 1 minute. The above-mentioned preset second time period can be set according to specific needs, and the embodiment does not make specific limitation here. It should be noted that there is no necessary connection between the above-mentioned preset first time period and the preset second time period.

[0059] The refrigeration control module of the refrigerator is configured to control the refrigeration compartment to enter a heating mode in response to a received heating instruction and to control the refrigeration compartment to enter a refrigeration mode in response to a received refrigeration instruction. When the refrigeration compartment enters the refrigeration mode, the refrigeration control module determines whether the current temperature of the refrigeration compartment is greater than a preset second temperature threshold. When the current temperature of the refrigeration compartment is not greater than the preset second temperature threshold, the current temperature of the refrigeration compartment is periodically refreshed according to a preset first time period, and it is determined again whether the current temperature of the refrigeration compartment is greater than the preset second temperature threshold (in this process, if the current temperature of the refrigeration compartment is less than the set temperature of the refrigeration compartment of the refrigerator, a heating instruction is generated by the main control module of the refrigerator, and the heating instruction is sent to the refrigeration control module, so that the refrigeration compartment of the refrigerator enters the heating mode). When the current temperature of the refrigeration compartment is greater than the preset second temperature threshold, the refrigeration compartment of the refrigerator is refrigerated by controlling the opening degree of the expansion valve, the condenser fan and the refrigeration fan when there is a refrigeration demand in the freezing compartment of the refrigerator, until the current temperature of the refrigeration compartment of the refrigerator is less than the preset first temperature threshold.

[0060] The expansion valve is installed between the condenser of the refrigerator and the refrigeration compartment of the refrigerator. Generally, the expansion valve has a throttling pressure reduction function, can make the liquid refrigerant flowing out of the condenser become low-temperature and low-pressure wet steam after throttling through the throttling port in the expansion valve, and can ensure that the liquid refrigerant entering the refrigeration evaporator (the evaporator of the refrigeration compartment) is completely evaporated into a gas state in the evaporator, thereby absorbing heat and reducing the temperature of the refrigeration compartment in the refrigerator. The refrigerant can be one of R134a, R502, R407C, R410A and other refrigerants suitable for refrigerators.

[0061] In the embodiment, when the expansion valve is fully open, the throttling function of the expansion valve is cancelled, and the condenser fan is closed and the refrigeration fan is opened. When the condenser receives high-temperature and high-pressure refrigerant from the compressor, the refrigerant in the condenser cannot be cooled because the condenser fan is closed, so that the refrigerant flowing out of the condenser is still high-temperature refrigerant. The refrigerant flowing into the expansion valve is also high-temperature refrigerant, the expansion valve has no throttling function and only serves as a passage. Therefore, the refrigerant flowing out of the expansion valve is also high-temperature refrigerant, and the refrigerant flowing into the refrigeration evaporator from the expansion valve is also high-temperature refrigerant. At this time, the heat in the high-temperature refrigerant in the refrigeration evaporator is dissipated into the refrigeration compartment through the opening of the refrigeration fan, thereby achieving heating of the refrigeration compartment.

[0062] The condenser fan can be a fan that transfers heat in the condenser to the external environment. The refrigeration fan can be a fan that, when the refrigeration chamber is in the heating mode, transfers heat in the refrigeration evaporator to the refrigeration chamber, or a fan that, when the refrigeration chamber is in the cooling mode, blows cold air generated by heat absorption of the refrigeration evaporator into the refrigeration chamber. The refrigeration evaporator is an evaporator in the refrigeration chamber, which is used to absorb heat in the refrigeration chamber when the refrigeration chamber is in the cooling mode, so that the refrigerant changes from a liquid state to a gaseous state in the evaporation process, thereby achieving the cooling effect of the refrigeration chamber; and is used to dissipate heat to the refrigeration chamber when the refrigeration chamber is in the heating mode, thereby achieving the heating effect of the refrigeration chamber.

[0063] Specifically, in one embodiment, before step S210, the method comprises:

[0064] In step S202, the ambient temperature of the environment where the refrigerator is located and the set temperature of the refrigeration chamber of the refrigerator are obtained.

[0065] The ambient temperature of the environment where the refrigerator is located and the set temperature of the refrigeration chamber of the refrigerator can be obtained by one of the following methods: a temperature sensor installed in the environment where the refrigerator is located, a black ball temperature method, a wet ball temperature method, a dry ball temperature method, etc. The set temperature of the refrigeration chamber of the refrigerator is determined by reading the set temperature of the refrigeration chamber of the main control module of the refrigerator.

[0066] In step S204, the size between the ambient temperature of the environment where the refrigerator is located and the set temperature of the refrigeration chamber of the refrigerator is determined.

[0067] Steps S202 to S204, by obtaining the ambient temperature of the environment where the refrigerator is located and the set temperature of the refrigeration chamber of the refrigerator, and determining the size between the ambient temperature of the environment where the refrigerator is located and the set temperature of the refrigeration chamber of the refrigerator, the size between the ambient temperature of the environment where the refrigerator is located and the set temperature of the refrigeration chamber of the refrigerator is determined, and then the main control module of the refrigerator generates a heating instruction or a cooling instruction based on the determination result, so that the refrigeration chamber of the refrigerator enters the heating mode or the cooling mode, to achieve the heating or cooling of the refrigeration chamber of the refrigerator according to the actual demand.

[0068] In addition, in one embodiment, after step S210, the method comprises:

[0069] In step S220, the refrigeration fan is turned off.

[0070] After the refrigeration chamber of the refrigerator is heated to a current temperature greater than a preset second temperature threshold, the refrigeration fan needs to be turned off at this time, so that the heat in the refrigeration evaporator is no longer blown into the refrigeration chamber.

[0071] In one embodiment, the control method of the refrigerator further comprises:

[0072] Step S230, determine whether the freezer of the refrigerator has a refrigeration requirement.

[0073] The above determination of whether the freezer of the refrigerator has a refrigeration requirement can be by obtaining the current temperature of the freezer of the refrigerator, and determining whether the current temperature of the freezer of the refrigerator is greater than a preset refrigeration start temperature of the freezer. When the current temperature of the freezer of the refrigerator is greater than the preset refrigeration start temperature of the freezer, it is determined that the freezer of the refrigerator has a refrigeration requirement. When the current temperature of the freezer of the refrigerator is less than or equal to the preset refrigeration start temperature of the freezer, it is determined that the freezer of the refrigerator does not have a refrigeration requirement. It should be noted that the above-mentioned preset refrigeration start temperature of the freezer can be a threshold value of the temperature at which the user needs to set the refrigeration of the freezer in advance. When the current temperature of the freezer of the refrigerator is greater than the preset refrigeration start temperature of the freezer, the compressor is started to refrigerate the freezer of the refrigerator. Otherwise, the compressor is turned off, and the freezer of the refrigerator is not refrigerated.

[0074] Step S240, in the case that the freezer of the refrigerator has a refrigeration requirement, start the compressor of the refrigerator.

[0075] In the case that the freezer of the refrigerator has a refrigeration requirement, the compressor of the refrigerator is started, so that the refrigerant passes through the refrigeration evaporator to enter the capillary tube between the refrigeration chamber and the freezer, and is throttled at the capillary tube to flow into the freezing evaporator of the freezer to refrigerate the freezer.

[0076] Step S250, in the case that the freezer of the refrigerator does not have a refrigeration requirement, turn off the compressor of the refrigerator.

[0077] In the case that the freezer of the refrigerator does not have a refrigeration requirement, the compressor of the refrigerator is turned off, so that the refrigerator does not refrigerate the freezer. It should be noted that generally, whether the compressor is started or not is determined according to whether the freezer has a refrigeration requirement. If the refrigeration chamber is in a refrigeration mode, when the freezer of the refrigerator has a refrigeration requirement, the compressor is started to control the opening degree of the expansion valve, the condensing fan and the refrigeration fan to refrigerate the refrigeration chamber of the refrigerator. If the refrigeration chamber is in a heating mode, when the freezer of the refrigerator has a refrigeration requirement, the compressor is started to control the opening degree of the expansion valve, the condensing fan and the refrigeration fan to heat the refrigeration chamber of the refrigerator.

[0078] The above steps S230 to S250 determine whether the freezer of the refrigerator has a refrigeration requirement, and control whether the compressor operates to refrigerate the freezer or not. By giving priority to whether the freezer needs to be refrigerated, the refrigeration chamber is heated or refrigerated only when the freezer needs to be refrigerated.

[0079] In addition, in one embodiment, the control method of the refrigerator further comprises:

[0080] In step S260, it is determined whether the defrosting condition is met when the ambient temperature of the environment in which the refrigerator is located is greater than or equal to the set temperature of the refrigerating compartment of the refrigerator.

[0081] When the ambient temperature of the environment in which the refrigerator is located is greater than or equal to the set temperature of the refrigerating compartment of the refrigerator, the refrigerating compartment of the refrigerator is in a refrigeration mode, and in this case, the refrigerator needs to be defrosted periodically to ensure the performance of the refrigerator. The determination of whether the defrosting condition is met can be made by determining whether the time interval between the current time and the last defrosting time is greater than or equal to a preset defrosting period. When the time interval between the current time and the last defrosting time is greater than or equal to the preset defrosting period, the defrosting condition is met. When the time interval between the current time and the last defrosting time is less than the preset defrosting period, the defrosting condition is not met.

[0082] In step S270, when the defrosting condition is met and the freezing compartment of the refrigerator has a refrigeration demand, the refrigerating evaporator of the refrigerator is defrosted by controlling the opening degree of the expansion valve, the condensing fan, and the refrigerating fan until the defrosting time length meets the preset defrosting time length.

[0083] The defrosting of the refrigerating evaporator of the refrigerator by controlling the opening degree of the expansion valve, the condensing fan, and the refrigerating fan can be achieved by controlling the expansion valve to be fully open, the condensing fan to be off, and the refrigerating fan to be off. By fully opening the expansion valve and turning off the condensing fan, the condenser receives high-temperature and high-pressure refrigerant without being cooled by the condensing fan, and the refrigerant directly flows into the expansion valve. The expansion valve does not have a throttling effect and only serves as a passage for the flow of high-temperature refrigerant. The high-temperature refrigerant enters the refrigerating evaporator of the refrigerating compartment to defrost the refrigerating evaporator. At this time, the refrigerating fan is turned off, and heat is not blown into the refrigerating compartment, so that the refrigeration effect of the refrigerating compartment is not affected during defrosting.

[0084] In step S280, when the defrosting condition is not met and the current temperature of the refrigerating compartment is greater than the preset second temperature threshold, the refrigerating compartment of the refrigerator is refrigerated by controlling the opening degree of the expansion valve, the condensing fan, and the refrigerating fan until the current temperature of the refrigerating compartment of the refrigerator is less than the preset first temperature threshold when the freezing compartment of the refrigerator has a refrigeration demand.

[0085] The refrigeration of the refrigerating compartment of the refrigerator by controlling the opening degree of the expansion valve, the condensing fan, and the refrigerating fan can be achieved by adjusting the opening degree of the expansion valve according to the ambient temperature of the environment in which the refrigerator is located and the set temperature of the refrigerating compartment of the refrigerator, turning on the refrigerating fan, and turning on the condensing fan.

[0086] Wherein, the above-mentioned adjusting the opening degree of the expansion valve according to the ambient temperature of the environment where the refrigerator is located and the set temperature of the refrigerating chamber of the refrigerator can be adjusting the opening degree X of the expansion valve according to the following opening degree calculation formula:

[0087]

[0088] Wherein, T w is the ambient temperature of the environment where the refrigerator is located, T s is the set temperature of the refrigerating chamber of the refrigerator.

[0089] In the refrigeration process of the refrigerating chamber of the refrigerator, the condensing fan is turned on to blow the heat of the high-temperature and high-pressure refrigerant of the condenser into the external environment, so as to realize the cooling of the high-temperature and high-pressure refrigerant in the condenser, and then the cooled refrigerant enters the expansion valve to be throttled and depressurized, so that the refrigerant becomes low-pressure liquid or low-pressure mixed state at the outlet of the expansion valve. The refrigerant flowing out of the expansion valve is evaporated in the refrigerating evaporator, absorbs heat around during evaporation, so that the temperature of the air near the refrigerating evaporator is reduced. By turning on the refrigerating fan, the refrigerating fan blows the low-temperature air into the refrigerating chamber to cool the refrigerating chamber.

[0090] The above-mentioned steps S260 to S280, by monitoring whether the refrigerator needs to defrost when the ambient temperature of the environment where the refrigerator is located is greater than or equal to the set temperature of the refrigerating chamber of the refrigerator, the refrigerating chamber is in the refrigeration mode, when defrosting, the opening degree of the expansion valve, the condensing fan and the refrigerating fan are controlled to defrost the refrigerating evaporator of the refrigerator, when there is no need to defrost, but the refrigerating chamber has refrigeration demand, the opening degree of the expansion valve, the condensing fan and the refrigerating fan are controlled to refrigerate the refrigerating chamber of the refrigerator, realizing the refrigeration and defrosting of the refrigerating chamber of the refrigerator.

[0091] Further, in an embodiment, based on step S270, when the refrigerator meets the defrosting condition and the freezing chamber of the refrigerator has refrigeration demand, the opening degree of the expansion valve, the condensing fan and the refrigerating fan are controlled to defrost the refrigerating evaporator of the refrigerator until the defrosting time length meets the preset defrosting time length, including:

[0092] Step S272, when the refrigerator meets the defrosting condition and the freezing chamber of the refrigerator has refrigeration demand, the expansion valve is fully opened, the condensing fan is turned off, and the refrigerating fan is turned off to defrost the refrigerating evaporator of the refrigerator until the defrosting time length meets the preset defrosting time length.

[0093] It should be noted that when the freezing chamber of the refrigerator has refrigeration demand, the compressor of the refrigerator is turned on at this time, and on this basis, the refrigerating chamber of the refrigerator can be defrosted. If only the defrosting condition is met and the refrigerating chamber of the refrigerator has no refrigeration demand, it needs to wait until the freezing chamber of the refrigerator has refrigeration demand to defrost.

[0094] In one embodiment, based on step S280, when the refrigerator does not meet the defrosting condition, and the current temperature of the refrigerating chamber is greater than the preset second temperature threshold, in the case that the freezing chamber of the refrigerator has a refrigeration demand, the refrigeration of the refrigerating chamber of the refrigerator is performed by controlling the opening degree of the expansion valve, the condensing fan and the refrigerating fan until the current temperature of the refrigerating chamber of the refrigerator is less than the preset first temperature threshold, including:

[0095] Step S282, when the refrigerator does not meet the defrosting condition, and the current temperature of the refrigerating chamber is greater than the preset second temperature threshold, in the case that the freezing chamber of the refrigerator has a refrigeration demand, the opening degree of the expansion valve is adjusted according to the difference between the ambient temperature of the environment where the refrigerator is located and the set temperature of the refrigerating chamber, and the condensing fan is controlled to be opened, the refrigerating fan is controlled to be opened, the refrigeration of the refrigerating chamber of the refrigerator is performed until the current temperature of the refrigerating chamber of the refrigerator is less than the preset first temperature threshold, and then the refrigerating fan is closed.

[0096] It should be noted that when the freezing chamber of the refrigerator has a refrigeration demand, the compressor of the refrigerator is turned on at this time, and on this basis, the refrigeration of the refrigerating chamber of the refrigerator can be performed. If only the refrigerating chamber meets the refrigeration condition and the refrigerating chamber of the refrigerator has no refrigeration demand, it needs to wait until the freezing chamber of the refrigerator has a refrigeration demand to perform the refrigeration of the refrigerating chamber.

[0097] The preferred embodiments will be described and explained below.

[0098] Figure 3 is a flowchart of the control method of the refrigerator provided by a preferred embodiment of the present application. As shown in Figure 3 The control method of the refrigerator includes the following steps:

[0099] Step S301, obtaining the ambient temperature of the environment where the refrigerator is located and the set temperature of the refrigerating chamber of the refrigerator;

[0100] Step S302, judging the size between the ambient temperature of the environment where the refrigerator is located and the set temperature of the refrigerating chamber of the refrigerator;

[0101] Step S303, when the ambient temperature of the environment where the refrigerator is located is less than the set temperature of the refrigerating chamber of the refrigerator, and the current temperature of the refrigerating chamber is less than the preset first temperature threshold, in the case that the freezing chamber of the refrigerator has a refrigeration demand, the refrigeration of the refrigerating chamber of the refrigerator is performed by controlling the expansion valve to be fully opened, the condensing fan to be closed and the refrigerating fan to be opened until the current temperature of the refrigerating chamber of the refrigerator is greater than the preset second temperature threshold;

[0102] Step S304, when the ambient temperature of the environment where the refrigerator is located is greater than or equal to the set temperature of the refrigerating chamber of the refrigerator, judging whether the refrigerator meets the defrosting condition;

[0103] Step S305, when the refrigerator meets the defrosting condition, and the refrigerator has a refrigeration demand in the freezer compartment, defrosting the refrigerator's refrigeration evaporator by controlling the expansion valve to be fully open, the condensing fan to be off, and the refrigeration fan to be off, until the defrosting time length meets the preset defrosting time length.

[0104] Step S306, when the refrigerator does not meet the defrosting condition, and the current temperature of the refrigeration compartment is greater than the preset second temperature threshold, in the case that the refrigerator has a refrigeration demand in the freezer compartment, adjusting the opening degree of the expansion valve according to the difference between the ambient temperature of the environment where the refrigerator is located and the set temperature of the refrigeration compartment, and controlling the condensing fan to be on and the refrigeration fan to be on to refrigerate the refrigeration compartment of the refrigerator, until the current temperature of the refrigeration compartment of the refrigerator is less than the preset first temperature threshold, and then turning off the refrigeration fan.

[0105] The above steps S301 to S306, by comprehensively considering the relationship between the ambient temperature of the environment where the refrigerator is located and the set temperature of the refrigeration compartment of the refrigerator, and the relationship between the current temperature of the refrigeration compartment and the preset first temperature threshold, it is judged whether the refrigeration compartment needs to be heated or refrigerated, and when the refrigeration compartment needs to be heated, the opening degree of the expansion valve of the refrigerator, the condensing fan and the refrigeration fan are controlled to heat the refrigeration compartment of the refrigerator, without changing the connection relationship and structure inside the refrigerator, only adjusting the opening degree of the expansion valve, the condensing fan and the refrigeration fan, which is simple and easy to implement, and solves the problem that the existing refrigerator control method cannot heat the refrigeration compartment, and the food in the refrigeration compartment is frozen when the room temperature is too low.

[0106] It should be understood that, although each step in the flowchart involved in each embodiment as described above is displayed in sequence according to the direction of the arrow, these steps are not necessarily executed in sequence according to the direction of the arrow. Unless otherwise specified herein, the execution of these steps is not strictly limited in sequence, and these steps can be executed in other sequences. Moreover, at least part of the steps in the flowchart involved in each embodiment as described above can include multiple steps or stages, which are not necessarily executed at the same time, but can be executed at different times, and the execution sequence of these steps or stages is not necessarily sequential, but can be executed alternately or alternately with at least part of other steps or steps or stages in other steps.

[0107] Based on the same inventive concept, in the present embodiment, a control device of a refrigerator is also provided, which is used to implement the above-mentioned embodiments and preferred embodiments, and will not be described again. The terms "module", "unit", "sub-unit" and the like used below can be a combination of software and / or hardware that can implement a predetermined function. Although the device described in the following embodiments is preferably implemented in software, hardware or a combination of software and hardware can also be implemented and conceived.

[0108] In one embodiment, the control device of the refrigerator provided in the present embodiment comprises:

[0109] The heating module 42 is configured to, when the ambient temperature of the environment in which the refrigerator is located is less than the set temperature of the refrigerating chamber of the refrigerator, and the current temperature of the refrigerating chamber is less than a preset first temperature threshold, and there is a refrigeration demand in the freezing chamber of the refrigerator, perform heating on the refrigerating chamber of the refrigerator by controlling the opening degree of the expansion valve, the condensing fan and the refrigerating fan of the refrigerator until the current temperature of the refrigerating chamber of the refrigerator is greater than a preset second temperature threshold; the preset first temperature threshold is a pre-set start temperature of the refrigerating chamber heating; the preset second temperature threshold is a pre-set stop temperature of the refrigerating chamber heating; the preset first temperature threshold is less than the set temperature of the refrigerating chamber; and the preset second temperature threshold is greater than the set temperature of the refrigerating chamber.

[0110] The control device of the refrigerator comprehensively considers the relationship between the ambient temperature of the environment in which the refrigerator is located and the set temperature of the refrigerating chamber of the refrigerator, and the relationship between the current temperature of the refrigerating chamber and the preset first temperature threshold, judges whether the refrigerating chamber needs to be heated, and when the refrigerating chamber needs to be heated and there is a refrigeration demand in the freezing chamber of the refrigerator, performs heating on the refrigerating chamber of the refrigerator by controlling the opening degree of the expansion valve, the condensing fan and the refrigerating fan of the refrigerator. No connection relationship and structure inside the refrigerator need to be changed, only the opening degree of the expansion valve, the condensing fan and the refrigerating fan need to be adjusted, which is simple and easy to implement, and solves the problem that the existing control method of the refrigerator cannot heat the refrigerating chamber, and the food in the refrigerating chamber is frozen when the room temperature is too low.

[0111] It should be noted that each of the above modules can be a functional module or a program module, and can be implemented by software or hardware. For the modules implemented by hardware, each of the above modules can be located in the same processor; or each of the above modules can also be located in different processors in any combination.

[0112] In one embodiment, a refrigerator is provided, which comprises a refrigerating chamber, a freezing chamber and a temperature control system. The temperature control system is used to implement any one of the control methods of the refrigerator in the above-mentioned embodiments. Figure 4is a structural diagram of a temperature control system of the refrigerator of the present embodiment, as shown in Figure 4 The temperature control system of the refrigerator comprises a compressor 41, a condensing module 42, an expansion valve 43, a refrigerating module 44, a capillary tube 45, a switching module 46 and a freezing module 47.

[0113] The compressor 41 is connected to the condensing module and the switching module 46, and is configured to compress the low-temperature and low-pressure refrigerant received by the switching module 46 into high-temperature and high-pressure refrigerant when the freezing chamber of the refrigerator has a refrigeration demand.

[0114] The condensing module 42 comprises a condenser and a condensing fan. The condenser is connected to the compressor 41 and the expansion valve 43, respectively, and is configured to cool the high-temperature and high-pressure refrigerant from the compressor 41 into liquid refrigerant when the condensing fan is turned on. The condensing fan is configured to blow air to the condenser when turned on.

[0115] The expansion valve 43 is connected to the refrigerating module 44, and is configured to heat the refrigerating chamber until the current temperature of the refrigerating chamber of the refrigerator is greater than a preset second temperature threshold when the ambient temperature of the environment where the refrigerator is located is less than the set temperature of the refrigerating chamber of the refrigerator, the current temperature of the refrigerating chamber is less than a preset first temperature threshold, and the freezing chamber of the refrigerator has a refrigeration demand. The expansion valve 43 is also configured to defrost the refrigerating evaporator of the refrigerator until the defrosting time length meets a preset defrosting time length when the refrigerator meets the defrosting condition. The expansion valve 43 is also configured to cool the refrigerating chamber until the current temperature of the refrigerating chamber of the refrigerator is less than the preset first temperature threshold when the refrigerator does not meet the defrosting condition and the current temperature of the refrigerating chamber is greater than the preset second temperature threshold.

[0116] The refrigerating module 44 comprises a refrigerating evaporator and a refrigerating fan. The refrigerating evaporator is connected to the expansion valve 43, the switching module 46 and the capillary tube 45. The refrigerating evaporator is configured to heat the refrigerating chamber of the refrigerator until the current temperature of the refrigerating chamber of the refrigerator is greater than a preset second temperature threshold when the ambient temperature of the environment where the refrigerator is located is less than the set temperature of the refrigerating chamber of the refrigerator, the current temperature of the refrigerating chamber is less than a preset first temperature threshold, and the freezing chamber of the refrigerator has a refrigeration demand. The refrigerating evaporator is also configured to defrost the refrigerating evaporator of the refrigerator until the defrosting time length meets a preset defrosting time length when the ambient temperature of the environment where the refrigerator is located is greater than or equal to the set temperature of the refrigerating chamber of the refrigerator, the refrigerator meets the defrosting condition, and the freezing chamber of the refrigerator has a refrigeration demand. The refrigerating evaporator is also configured to cool the refrigerating chamber of the refrigerator until the current temperature of the refrigerating chamber of the refrigerator is less than the preset first temperature threshold when the ambient temperature of the environment where the refrigerator is located is greater than or equal to the set temperature of the refrigerating chamber of the refrigerator, the refrigerator does not meet the defrosting condition, the current temperature of the refrigerating chamber is greater than the preset second temperature threshold, and the freezing chamber of the refrigerator has a refrigeration demand. The refrigerating fan is configured to blow air to the refrigerating evaporator when turned on.

[0117] A capillary tube 45 is connected to the freezing module 47 and used to throttle the refrigerant flowing out of the refrigeration module 44 to obtain throttled refrigerant;

[0118] The freezing module 47 is connected to the switching module 46 and used to use the throttled refrigerant flowing out of the capillary tube 45 to refrigerate the freezing chamber of the refrigerator.

[0119] The switching module 46 at least includes a switching valve and is used to switch the refrigerant flowing out of the refrigeration module 44 to flow into the compressor 41 and the refrigerant flowing out of the freezing module 47 to flow into the compressor 41 based on whether the freezing chamber of the refrigerator has a refrigeration demand.

[0120] The freezing module 47 includes a freezing evaporator and a freezing fan. The freezing evaporator absorbs heat in the freezing chamber through evaporation of the refrigerant to reduce the indoor temperature. The freezing fan is used to circulate air inside the freezing chamber to ensure uniform distribution of cold air, avoid temperature unevenness, improve freezing efficiency, and accelerate heat transfer in the freezing chamber through forced convection of the freezing fan to make the refrigerant absorb heat faster and improve refrigeration speed.

[0121] Under normal circumstances, the switching valve of the switching module 46 is in communication with the freezing evaporator of the freezing module 47, and the refrigerant flowing out of the freezing evaporator is compressed by the compressor 41 to compress the refrigerant into high-temperature and high-pressure refrigerant.

[0122] When the main control module determines that the refrigeration chamber of the refrigerator is in a refrigeration mode, the compressor 41 is turned on, and the condensing fan is turned on at this time. The high-temperature and high-pressure refrigerant flowing out of the compressor 41 flows into the condenser, and is cooled by the condensing fan to obtain refrigerant cooled to a liquid state. The cooled refrigerant flows into the expansion valve 43, and the expansion valve 43 has a throttling effect at this time, so that the refrigerant becomes low-pressure liquid or low-pressure mixed state (liquid and gas mixed state) at the outlet of the expansion valve 43. The refrigerant flowing out of the expansion valve 43 is evaporated in the refrigeration evaporator, absorbs heat around the refrigeration evaporator during evaporation, and reduces the temperature of the air near the refrigeration evaporator. The refrigeration fan is turned on, and the refrigeration fan blows cold air into the refrigeration chamber to cool the refrigeration chamber. At this time, the refrigerant is divided into liquid and gas. The gaseous refrigerant can return to the compressor 41 along the expansion valve 43 and the condenser. The liquid refrigerant enters the capillary tube 45, and the low-temperature and low-pressure refrigerant is obtained after throttling and pressure reduction of the capillary tube 45. The low-temperature and low-pressure refrigerant enters the freezing evaporator, and the freezing fan is turned on to blow cold air into the freezing chamber to cool the freezing chamber. The refrigerant in the freezing chamber returns to the compressor 41 through the switching valve.

[0123] When the main control module determines that the refrigeration chamber of the refrigerator is in the heating mode, the condensing fan is closed at this time, the high-temperature and high-pressure refrigerant flowing out of the compressor 41 flows into the condenser, and in the case that the condensing fan is closed, the heat dissipation is limited, and the refrigerant flowing into the expansion valve 43 is still high-temperature and high-pressure refrigerant. At this time, the expansion valve 43 is fully open and does not have a throttling effect. The refrigerant flowing out of the expansion valve 43 is still high-temperature refrigerant. The high-temperature refrigerant flows into the refrigeration evaporator, and in the case that the refrigeration fan is opened, the high-temperature air is blown into the refrigeration chamber to dissipate heat in the refrigeration chamber. At this time, the refrigerant is divided into liquid and gas. The gaseous refrigerant can flow along the expansion valve 43, the condenser, and return to the compressor 41. The liquid refrigerant enters the capillary tube 45, is throttled and reduced in pressure by the capillary tube 45, and becomes low-temperature and low-pressure refrigerant. The low-temperature and low-pressure refrigerant enters the freezing evaporator, and the freezing fan is opened to blow cold air into the freezing chamber to cool the freezing chamber. The refrigerant in the freezing chamber returns to the compressor 41 through the switching valve.

[0124] In some cases, the switching valve of the switching module 46 is in communication with the compressor 41 and the refrigeration evaporator of the refrigeration module 44. The refrigerant flowing out of the refrigeration evaporator is compressed by the compressor 41 to compress the refrigerant into high-temperature and high-pressure refrigerant. In some cases, the refrigerant in the refrigeration evaporator of the refrigerator does not need to enter the freezing module 47. At this time, the refrigerant of the refrigeration evaporator needs to flow directly into the compressor 41 through the switching valve.

[0125] Under normal circumstances, the compressor 41 is only started when the freezing chamber has a refrigeration demand. However, in order to ensure the normal operation of the refrigerator, the compressor 41 can also be started when the refrigeration chamber has a refrigeration demand in the case of abnormal freezing chamber or special circumstances.

[0126] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer readable storage medium, and when the computer program is executed, the processes of the above-mentioned embodiments of the methods can be included. Any reference to memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical storage, high-density embedded non-volatile memory, resistive memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration but not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc. The database involved in the embodiments provided in the present application can include at least one of a relational database and a non-relational database. The non-relational database can include a distributed database based on a block chain, etc., without being limited thereto. The processor involved in the embodiments provided in the present application can be a general-purpose processor, a central processing unit, a graphics processing unit, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., without being limited thereto.

[0127] Any combination of the technical features of the above embodiments can be made. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combination of the technical features does not exist, it should be considered as the scope of the present application.

[0128] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A control method of a refrigerator, characterized by, The method comprises: When the ambient temperature of the environment where the refrigerator is located is less than the set temperature of the refrigerating chamber of the refrigerator, and the current temperature of the refrigerating chamber is less than a preset first temperature threshold, in the case that the freezing chamber of the refrigerator has a refrigeration demand, the refrigerating chamber of the refrigerator is heated by controlling the expansion valve of the refrigerator to be fully opened, the condensing fan to be turned off and the refrigerating fan to be turned on, until the current temperature of the refrigerating chamber of the refrigerator is greater than a preset second temperature threshold; the preset first temperature threshold is a pre-set start temperature of refrigerating chamber heating; the preset second temperature threshold is a pre-set stop temperature of refrigerating chamber heating; the preset first temperature threshold is less than the set temperature of the refrigerating chamber; and the preset second temperature threshold is greater than the set temperature of the refrigerating chamber; When the ambient temperature of the environment where the refrigerator is located is greater than or equal to the set temperature of the refrigerating chamber of the refrigerator, it is judged whether the refrigerator meets the defrosting condition; When the refrigerator meets the defrosting condition and the freezing chamber of the refrigerator has a refrigeration demand, the refrigerating evaporator of the refrigerator is defrosted by controlling the expansion valve to be fully opened, the condensing fan to be turned off and the refrigerating fan to be turned off, until the defrosting time length meets a preset defrosting time length; When the refrigerator does not meet the defrosting condition and the current temperature of the refrigerating chamber is greater than the preset second temperature threshold, in the case that the freezing chamber of the refrigerator has a refrigeration demand, the refrigerating chamber of the refrigerator is refrigerated by controlling the opening degree of the expansion valve, the condensing fan and the refrigerating fan, until the current temperature of the refrigerating chamber of the refrigerator is less than the preset first temperature threshold. 2.The control method of a refrigerator according to claim 1, characterized in that, Before, when the ambient temperature of the environment where the refrigerator is located is less than the set temperature of the refrigerating chamber of the refrigerator, and the current temperature of the refrigerating chamber is less than a preset first temperature threshold, in the case that the freezing chamber of the refrigerator has a refrigeration demand, the refrigerating chamber of the refrigerator is heated by controlling the expansion valve of the refrigerator to be fully opened, the condensing fan to be turned off and the refrigerating fan to be turned on, until the current temperature of the refrigerating chamber of the refrigerator is greater than a preset second temperature threshold, comprising: The ambient temperature of the environment where the refrigerator is located and the set temperature of the refrigerating chamber of the refrigerator are acquired; It is judged that the ambient temperature of the environment where the refrigerator is located and the set temperature of the refrigerating chamber of the refrigerator are greater than or equal to the set temperature of the refrigerating chamber of the refrigerator. 3.The control method of a refrigerator according to claim 1, characterized in that, After, when the ambient temperature of the environment where the refrigerator is located is less than the set temperature of the refrigerating chamber of the refrigerator, and the current temperature of the refrigerating chamber is less than a preset first temperature threshold, in the case that the freezing chamber of the refrigerator has a refrigeration demand, the refrigerating chamber of the refrigerator is heated by controlling the expansion valve of the refrigerator to be fully opened, the condensing fan to be turned off and the refrigerating fan to be turned on, until the current temperature of the refrigerating chamber of the refrigerator is greater than a preset second temperature threshold, comprising: The refrigerating fan is turned off. 4.The control method of a refrigerator according to claim 1, characterized in that, Further comprising: It is judged whether the freezing chamber of the refrigerator has a refrigeration demand; In the case that the freezing chamber of the refrigerator has a refrigeration demand, the compressor of the refrigerator is turned on; In the case that the freezing chamber of the refrigerator has a refrigeration demand when the refrigerator does not meet the defrosting condition and the current temperature of the refrigerating chamber is greater than the preset second temperature threshold, the refrigerating chamber of the refrigerator is refrigerated by controlling the opening degree of the expansion valve, the condensing fan and the refrigerating fan until the current temperature of the refrigerating chamber of the refrigerator is less than the preset first temperature threshold. 5.The control method of a refrigerator according to claim 1, characterized in that, In the case that the freezing chamber of the refrigerator has a refrigeration demand when the refrigerator does not meet the defrosting condition and the current temperature of the refrigerating chamber is greater than the preset second temperature threshold, the opening degree of the expansion valve is adjusted according to the difference between the ambient temperature of the environment where the refrigerator is located and the set temperature of the refrigerating chamber, and the condensing fan is controlled to be turned on and the refrigerating fan is controlled to be turned on to refrigerate the refrigerating chamber of the refrigerator until the current temperature of the refrigerating chamber of the refrigerator is less than the preset first temperature threshold, and then the refrigerating fan is turned off. The device comprises:

6. A control device of a refrigerator, characterized by comprising: The heating module is configured to, in the case that the freezing chamber of the refrigerator has a refrigeration demand when the ambient temperature of the environment where the refrigerator is located is less than the set temperature of the refrigerating chamber of the refrigerator and the current temperature of the refrigerating chamber is less than the preset first temperature threshold, refrigerate the refrigerating chamber of the refrigerator by controlling the expansion valve of the refrigerator to be fully opened, the condensing fan to be turned off and the refrigerating fan to be turned on until the current temperature of the refrigerating chamber of the refrigerator is greater than the preset second temperature threshold; the preset first temperature threshold is a preset start temperature of refrigerating chamber heating; the preset second temperature threshold is a preset stop temperature of refrigerating chamber heating; the preset first temperature threshold is less than the set temperature of the refrigerating chamber; the preset second temperature threshold is greater than the set temperature of the refrigerating chamber; when the ambient temperature of the environment where the refrigerator is located is greater than or equal to the set temperature of the refrigerating chamber of the refrigerator, it is determined whether the refrigerator meets the defrosting condition; when the refrigerator meets the defrosting condition and the freezing chamber of the refrigerator has a refrigeration demand, defrost the refrigerating evaporator of the refrigerator by controlling the expansion valve to be fully opened, the condensing fan to be turned off and the refrigerating fan to be turned off until the defrosting time length meets the preset defrosting time length; in the case that the freezing chamber of the refrigerator has a refrigeration demand when the refrigerator does not meet the defrosting condition and the current temperature of the refrigerating chamber is greater than the preset second temperature threshold, the refrigerating chamber of the refrigerator is refrigerated by controlling the opening degree of the expansion valve, the condensing fan and the refrigerating fan until the current temperature of the refrigerating chamber of the refrigerator is less than the preset first temperature threshold. The temperature control system is configured to implement the control method of the refrigerator according to any one of claims 1-5; and the temperature control system comprises a compressor, a condensing module, an expansion valve, a refrigerating module, a capillary, a switching module and a freezing module.

7. A refrigerator comprising a refrigeration chamber, a freezing chamber and a temperature control system, characterized in that ​ The compressor is connected to the condensing module and the switching module, and is used for compressing the low-temperature and low-pressure refrigerant received by the switching module into high-temperature and high-pressure refrigerant when the freezing chamber of the refrigerator has a refrigeration demand. The condensing module comprises a condenser and a condensing fan; the condenser is connected to the compressor and the expansion valve respectively, and is used for cooling the high-temperature and high-pressure refrigerant from the compressor into liquid refrigerant when the condensing fan is turned on; and the condensing fan is used for blowing air to the condenser in the turned-on state. The expansion valve is connected to the refrigerating module, and is used for heating the refrigerating chamber of the refrigerator until the current temperature of the refrigerating chamber of the refrigerator is greater than the preset second temperature threshold when the ambient temperature is less than the set temperature of the refrigerating chamber of the refrigerator, the current temperature of the refrigerating chamber of the refrigerator is less than the preset first temperature threshold, and the freezing chamber of the refrigerator has a refrigeration demand; the expansion valve is also used for defrosting the refrigerating evaporator of the refrigerator until the preset defrosting time length is met when the refrigerator meets the defrosting condition; and the expansion valve is also used for refrigerating the refrigerating chamber of the refrigerator until the current temperature of the refrigerating chamber of the refrigerator is less than the preset first temperature threshold when the refrigerator does not meet the defrosting condition and the current temperature of the refrigerating chamber of the refrigerator is greater than the preset second temperature threshold. The refrigerating module comprises a refrigerating evaporator and a refrigerating fan; the refrigerating evaporator is connected to the expansion valve, the switching module and the capillary tube; the refrigerating evaporator is used for heating the refrigerating chamber of the refrigerator until the current temperature of the refrigerating chamber of the refrigerator is greater than the preset second temperature threshold when the ambient temperature of the environment where the refrigerator is located is less than the set temperature of the refrigerating chamber of the refrigerator, the current temperature of the refrigerating chamber of the refrigerator is less than the preset first temperature threshold, and the freezing chamber of the refrigerator has a refrigeration demand; the refrigerating evaporator is also used for defrosting the refrigerating evaporator of the refrigerator until the defrosting time length meets the preset defrosting time length when the ambient temperature of the environment where the refrigerator is located is greater than or equal to the set temperature of the refrigerating chamber of the refrigerator, the refrigerator meets the defrosting condition, and the freezing chamber of the refrigerator has a refrigeration demand; the refrigerating evaporator is also used for refrigerating the refrigerating chamber of the refrigerator until the current temperature of the refrigerating chamber of the refrigerator is less than the preset first temperature threshold when the ambient temperature of the environment where the refrigerator is located is greater than or equal to the set temperature of the refrigerating chamber of the refrigerator, the refrigerator does not meet the defrosting condition, the current temperature of the refrigerating chamber of the refrigerator is greater than the preset second temperature threshold, and the freezing chamber of the refrigerator has a refrigeration demand; and the refrigerating fan is used for blowing air to the refrigerating evaporator in the turned-on state. The capillary tube is connected to the freezing module, and is used for throttling the refrigerant flowing out of the refrigerating module to obtain throttled refrigerant. The freezing module is connected to the switching module, and is used for refrigerating the freezing chamber of the refrigerator by using the throttled refrigerant flowing out of the capillary tube. The switching module comprises at least one switching valve.

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