Refrigerator and control method thereof

Abstract

The invention discloses a refrigerator and a control method thereof, relates to the technical field of refrigerators, and aims to solve the problem of poor energy efficiency of a single-system refrigerator in the prior art. The refrigerator comprises a refrigerator body, a refrigerating system and a gas-liquid separator, and a storage chamber used for storing food is formed in the refrigerator body; the refrigerating system is used for refrigerating the storage chamber and comprises a compressor, a first condenser, a second condenser, a throttling device and an evaporator which are sequentially communicated through a pipeline to form a refrigerant circulation loop; the gas-liquid separator is connected to the circulation loop in series, an inlet of the gas-liquid separator communicates with an outlet of the first condenser, a gas-state outlet of the gas-liquid separator communicates with an inlet of the second condenser, and a liquid-state outlet of the gas-liquid separator is connected between the second condenser and the throttling device. The refrigerator is used for storing food.

Description

Technical Field

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

[0002] Single-system refrigerators have only one refrigeration system, and use the same refrigeration system to cool both the freezer and refrigerator compartments. The new standards issued by Europe have set higher requirements for the energy efficiency and noise of refrigerators. As energy prices in Europe increase, consumers are also paying more attention to the energy consumption level of home appliances. Therefore, single-system refrigerators exported to Europe need to meet the requirements of high energy efficiency and low noise.

[0003] In the related art, a single-system refrigerator includes a bottom condenser and a back condenser arranged in series, and a condensing fan is arranged at the bottom condenser to cool the bottom condenser through the condensing fan. And the condensing fan is usually frequency-controlled, that is, the speed of the condensing fan can be adjusted as the heat load of the refrigerator changes, so as to adjust the condensing effect of the bottom condenser.

[0004] However, as the speed of the condensing fan changes, the condensing efficiency of the bottom condenser will also change, resulting in changes in the content of liquid refrigerant and gaseous refrigerant in the refrigerant after condensation by the bottom condenser. When there is more liquid refrigerant, the liquid refrigerant will affect the condensation effect of the gaseous refrigerant in the back condenser, resulting in more gaseous refrigerant in the refrigerant entering the evaporator, affecting the heat exchange effect of the evaporator, thereby affecting the energy efficiency of the single-system refrigerator. Summary of the invention

[0005] The embodiments of the present invention provide a refrigerator and a control method thereof, which solve the problem of poor energy efficiency of a single-system refrigerator in the related art.

[0006] To achieve the above object, the embodiments of the present invention adopt the following technical solutions:

[0007] According to a first aspect of the present application, there is provided a refrigerator, comprising a cabinet, a refrigeration system and a gas-liquid separator, wherein a storage chamber for storing food is formed in the cabinet; the refrigeration system is used to refrigerate the storage chamber, and the refrigeration system comprises a compressor, a first condenser, a second condenser, a throttling device and an evaporator which are sequentially connected through pipelines to form a circulation loop of a refrigerant; the gas-liquid separator is connected in series to the circulation loop, and an inlet of the gas-liquid separator is connected to an outlet of the first condenser, a gaseous outlet of the gas-liquid separator is connected to an inlet of the second condenser, and a liquid outlet of the gas-liquid separator is connected between the second condenser and the throttling device.

[0008] The refrigerator provided by the present application can make the refrigerant condensed by the first condenser enter the gas-liquid separator before entering the second condenser by arranging a gas-liquid separator between the first condenser and the second condenser, so that the liquid refrigerant and the gas refrigerant entering the gas-liquid separator can be separated into layers. The separated gaseous refrigerant enters the second condenser through the gaseous outlet of the gas-liquid separator for further condensation, and the liquid refrigerant flows out through the liquid outlet of the gas-liquid separator to merge with the refrigerant condensed by the second condenser and enter the throttling device.

[0009] In this way, the amount of liquid refrigerant entering the second condenser can be reduced, thereby increasing the dryness of the refrigerant entering the second condenser, so that the second condenser can condense more gaseous refrigerant into liquid refrigerant, thereby reducing the amount of gaseous refrigerant entering the evaporator, thereby improving the heat exchange effect of the evaporator and improving the energy efficiency of the refrigerator.

[0010] In some embodiments, the refrigerator also includes an electric liquid separator valve and a controller. The liquid outlet of the gas-liquid separator is connected between the second condenser and the throttling device through the electric liquid separator valve. The electric liquid separator valve is used to adjust the refrigerant flow rate of the liquid outlet of the gas-liquid separator; the controller is connected to the electric liquid separator valve and is configured to: obtain the current content information of the liquid refrigerant in the gas-liquid separator; control the operation of the electric liquid separator valve according to the current content information to reduce the amount of liquid refrigerant entering the second condenser; by controlling the operation of the electric liquid separator valve according to the current content information of the liquid refrigerant in the gas-liquid separator by the controller, the flow rate of the refrigerant in the gas-liquid separator can be more accurately controlled to improve the condensation effect of the second condenser.

[0011] In some embodiments, the refrigerator also includes a condensing fan, a speed sensor, a first temperature sensor and a second temperature sensor. The condensing fan is arranged on one side of the first condenser for blowing air to the first condenser; the speed sensor is used to detect the speed of the condensing fan; the first temperature sensor is arranged at the gaseous outlet of the gas-liquid separator for detecting the outlet temperature of the gas-liquid separator; the second temperature sensor is arranged on the outside of the refrigerator for detecting the ambient temperature; the controller executes to obtain the current content information of the liquid refrigerant in the gas-liquid separator, and is configured to: obtain the current speed of the condensing fan; obtain the current outlet temperature of the gas-liquid separator and the current ambient temperature of the external environment of the refrigerator, and calculate the current temperature difference between the current outlet temperature and the current ambient temperature; according to a preset mapping relationship, determine the current content information corresponding to the current speed and the current temperature difference, the mapping relationship is used to indicate different content information corresponding to different speeds and different temperature differences; through the mapping relationship, after knowing the current speed and the current temperature difference, the current content information can be quickly obtained, so as to facilitate timely adjustment of the electric liquid separation valve.

[0012] In some embodiments, the controller executes according to a preset mapping relationship to determine the current content information corresponding to the current speed and the current temperature difference, and is configured to: determine the target speed range in which the current speed of the condensing fan is located, the target speed range is one of multiple preset speed ranges; determine the target temperature difference range in which the current temperature difference is located, the target temperature difference range is one of multiple preset temperature difference ranges corresponding to the target speed range; determine the current content information according to the target temperature difference range, the current content information is one of multiple preset content information, wherein one preset temperature difference range corresponds to one preset content information; through the above settings, when obtaining the current content information of the liquid refrigerant in the gas-liquid separator, the judgment and comparison process can be simplified and the acquisition efficiency can be improved.

[0013] In some embodiments, the refrigeration system also includes a drying filter, which is connected in series on the pipeline between the electric liquid separation valve and the throttling device; and / or the controller controls the operation of the electric liquid separation valve according to the current content information, and is configured to: determine the target control strategy corresponding to the current content information according to the correspondence between different preset content information and different control strategies of the electric liquid separation valve; control the electric liquid separation valve to operate according to the target control strategy; through the correspondence between different content information and different control strategies, after knowing the current content information of the liquid refrigerant in the gas-liquid separator, the target control strategy of the electric liquid separation valve can be quickly obtained, so that the electric liquid separation valve can be adjusted in time.

[0014] In some embodiments, the electric liquid separation valve is a solenoid valve; a control strategy is one of fully opening the solenoid valve, fully closing the solenoid valve, and cyclically switching the solenoid valve according to a preset period; the solenoid valve responds quickly and can quickly adjust the flow of liquid refrigerant.

[0015] In some embodiments, multiple preset speed intervals are formed by dividing the range between the minimum speed and the maximum speed of the condensing fan into multiple intervals, and the division ranges of the multiple preset temperature difference intervals corresponding to different preset speed intervals are different. In this way, the information on the content of liquid refrigerant in the gas-liquid separator can be judged relatively accurately, thereby maximizing the condensation effect of the second condenser.

[0016] According to the second aspect of the present application, a refrigerator control method is provided, including: obtaining current content information of liquid refrigerant in a gas-liquid separator; and controlling the operation of an electric liquid separation valve according to the current content information to reduce the amount of liquid refrigerant entering a second condenser.

[0017] In some embodiments, obtaining the current content information of the liquid refrigerant in the gas-liquid separator includes: obtaining the current speed of the condensing fan; obtaining the current outlet temperature of the gas-liquid separator and the current ambient temperature of the external environment of the refrigerator, and calculating the current temperature difference between the current outlet temperature and the current ambient temperature; according to a preset mapping relationship, determining the current content information corresponding to the current speed and the current temperature difference, the mapping relationship is used to indicate different content information corresponding to different speeds and different temperature differences.

[0018] In some embodiments, controlling the operation of the electric liquid-dispensing valve according to the current content information includes: determining the target control strategy corresponding to the current content information according to the correspondence between different preset content information and different control strategies of the electric liquid-dispensing valve; and controlling the electric liquid-dispensing valve to operate according to the target control strategy.

[0019] It should be noted that the technical effects brought about by the implementation method of the second aspect can refer to the technical effects brought about by the corresponding implementation method in the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is one of the structural schematic diagrams of the refrigerator in the embodiment of the present application;

[0021] Figure 2 This is a partial structural schematic diagram of a refrigerator in an embodiment of the present application;

[0022] Figure 3 This is a schematic cross-sectional structural diagram of a refrigerator in an embodiment of the present application;

[0023] Figure 4 This is the second structural diagram of the refrigerator in the embodiment of the present application;

[0024] Figure 5 This is the third structural diagram of the refrigerator in the embodiment of the present application;

[0025] Figure 6 This is one of the connection relationship diagrams of the refrigeration system in the embodiment of the present application;

[0026] Figure 7 for Figure 3 A schematic diagram of the structure enlargement in the middle;

[0027] Figure 8 This is the second schematic diagram of the connection relationship of the refrigeration system in the embodiment of the present application;

[0028] Fig. 9 This is a schematic diagram of the structure of the gas-liquid separator in the embodiment of the present application;

[0029] Fig.10 This is one of the schematic diagrams of the connection relationship between the controller and other components in the embodiment of the present application;

[0030] Fig.11 This is the second schematic diagram of the connection relationship between the controller and other components in the embodiment of the present application;

[0031] Fig.12 This is one of the flow charts of the refrigerator control method in the embodiment of the present application;

[0032] Fig.13 This is the second flow chart of the refrigerator control method in the embodiment of the present application;

[0033] Fig.14 This is the third flow chart of the refrigerator control method in the embodiment of the present application;

[0034] Fig.15 This is a fourth flow chart of the refrigerator control method in the embodiment of the present application;

[0035] Fig.16 This is the fifth flow chart of the refrigerator control method in the embodiment of the present application;

[0036] Fig.17 This is the sixth flow chart of the refrigerator control method in the embodiment of the present application.

[0037] Reference numerals:

[0038] 1-box; 11-storage room; 111-refrigerating room; 112-freezing room; 12-freezing air duct; 13-refrigerating air duct; 14-return air duct; 15-installation cavity;

[0039] 2- portal;

[0040] 3-refrigeration system; 31-compressor; 32-first condenser; 33-second condenser; 34-throttling device; 35-evaporator; 36-circulation fan; 37-drying filter;

[0041] 4-Condensing fan;

[0042] 5-gas-liquid separator; 51-gas outlet; 52-liquid outlet;

[0043] 6-Electric liquid separation valve;

[0044] 7- Controller;

[0045] 8-Speed ​​sensor;

[0046] 9- a first temperature sensor;

[0047] 10- Second temperature sensor. DETAILED DESCRIPTION

[0048] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0049] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0050] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0051] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, when describing pipelines or channels, the "connected" and "connected" used in this application have the meaning of conduction. The specific meaning needs to be understood in conjunction with the context.

[0052] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0053] As a common household appliance, refrigerators are widely used in daily life. Refrigerators include single-system refrigerators and double-system refrigerators. Among them, single-system refrigerators are widely used because of their simplicity of use and low price.

[0054] The refrigeration system of the single-system refrigerator includes a bottom condenser and a back condenser connected in series, and a condensing fan is arranged at the bottom condenser. During the refrigeration process, the speed of the condensing fan is adjusted as the heat load of the refrigerator changes.

[0055] As a result, the condensation efficiency of the bottom condenser will also change, and the content of liquid refrigerant and gaseous refrigerant in the refrigerant after condensation in the bottom condenser will also change, which will cause the dryness of the refrigerant entering the back condenser to change, thereby affecting the condensation heat exchange efficiency of the back condenser.

[0056] Based on this, the embodiment of the present application provides a refrigerator, such as Figure 1 As shown, the refrigerator includes a box body 1 and a door body 2. A storage chamber 11 with an opening on one side is formed in the box body 1, and the storage chamber 11 is defined as a refrigerating chamber 111 and a freezing chamber 112 isolated from each other. The door body 2 is arranged at the opening for opening or closing the opening.

[0057] The refrigerating chamber 111 and the freezing chamber 112 are both used to store food, and the temperature of the refrigerating chamber 111 is higher than the temperature of the freezing chamber 112. Figure 2 As shown, the refrigerator further includes a refrigeration system 3. The refrigeration system 3 is arranged in the box body 1, and is used to adjust the temperature of the refrigerating chamber 111 and the temperature of the freezing chamber 112, so as to improve the storage effect of the freezing chamber 112 and the refrigerating chamber 111 on food.

[0058] like Figure 3 As shown, a freezing air duct 12 and a refrigerating air duct 13 are also formed in the box body 1. Figure 4 As shown, the air inlet of the freezing air duct 12 and the air outlet of the freezing air duct 12 are both connected to the freezing chamber 112. Figure 5 As shown, the freezing air duct 12 is connected to the freezing chamber 112 to form a freezing circulation air path of the freezing chamber 112 (such as Figure 5 The temperature of the freezing chamber 112 can be adjusted by cooling the air in the freezing cycle through the refrigeration system 3.

[0059] like Figure 4 As shown, the air inlet of the refrigerating air duct 13 is connected to the air outlet of the freezing air duct 12, the air outlet of the refrigerating air duct 13 is connected to the refrigerating chamber 111, and the refrigerating chamber 111 is connected to the return air outlet of the freezing air duct 12. Specifically, a return air duct 14 is also formed in the cabinet 1, the inlet of the return air duct 14 is connected to the refrigerating chamber 111, and the outlet of the return air duct 14 is connected to the return air outlet of the freezing air duct 12, so that the refrigerating chamber 111 is connected to the return air outlet of the freezing air duct 12 through the return air duct 14.

[0060] like Figure 5 As shown, the freezing air duct 12, the refrigerating air duct 13, the refrigerating chamber 111 and the return air duct 14 are connected in sequence to form a refrigerating circulation air path (such as Figure 5 The temperature of the refrigerating chamber 111 can be adjusted by cooling the air in the refrigerating circulating air path 111 through the refrigerating system 3.

[0061] Specifically, Figure 6 As shown, the refrigeration system 3 includes a compressor 31, a first condenser 32, a second condenser 33, a throttling device 34 and an evaporator 35 which are connected in sequence through pipelines to form a circulation loop of the refrigerant. Figure 7 As shown, the evaporator 35 is arranged in the freezing air duct 12. The refrigerator further includes a circulation fan 36, which is also arranged in the freezing air duct 12.

[0062] When the refrigeration system 3 is running, the refrigerant in the refrigeration system 3 is compressed into a high-temperature and high-pressure refrigerant by the compressor 31. The high-temperature and high-pressure refrigerant flows out of the compressor 31 and enters the first condenser 32, and is condensed into a high-temperature and high-pressure liquid refrigerant through the first condenser 32. The high-temperature and high-pressure liquid refrigerant flows out of the first condenser 32 and enters the second condenser 33 for re-condensation to improve the condensation effect of the refrigerant.

[0063] The refrigerant that is condensed again by the second condenser 33 enters the throttling device 34, and is throttled and reduced in pressure by the throttling device 34 to become a low-temperature and low-pressure liquid refrigerant. The low-temperature and low-pressure liquid refrigerant flows out of the throttling device 34 and enters the evaporator 35, and is evaporated by the evaporator 35 to become a low-temperature and low-pressure gaseous refrigerant. The low-temperature and low-pressure gaseous refrigerant flows out of the evaporator 35 and enters the compressor 31 to be compressed again.

[0064] In which, during the evaporation process of the refrigerant in the evaporator 35, the refrigerant will exchange heat with the air in the freezing air duct 12, thereby reducing the air temperature in the freezing air duct 12. Under the action of the circulating fan 36, the air with reduced temperature can reduce the temperature of the freezing chamber 112 in the process of flowing through the freezing chamber 112 through the freezing circulating air path, and can reduce the temperature of the refrigerating chamber 111 in the process of flowing through the refrigerating chamber 111 through the refrigerating circulating air path.

[0065] The operation of the refrigeration system 3 refers to the operation of the compressor 31, and the operation of the compressor 31 can cause the refrigerant to circulate in the refrigerant circulation loop. The speed of the compressor 31 when it is started can be set according to the start-up rate of the refrigerator. Specifically, according to the corresponding relationship between the start-up rate of the compressor 31 and the preset start-up speed of the compressor 31, the compressor 31 can be controlled to operate at the preset start-up speed.

[0066] The corresponding relationship between the startup rate of the compressor 31 and the preset startup speed of the compressor 31 can be: when the startup rate is greater than 90%, the preset startup speed is 4200r / min, when the startup rate is 80-90%, the preset startup speed is 3900r / min, when the startup rate is 60-80%, the preset startup speed is 3000r / min, when the startup rate is 50-60%, the preset startup speed is 2400r / min, when the startup rate is 30-50%, the preset startup speed is 2000r / min. When the startup rate is less than 30%, the preset startup speed is 1200r / min.

[0067] By setting the preset startup speed of the compressor 31 according to the startup rate of the compressor 31, the compressor 31 can be operated at a relatively suitable speed to avoid excessive energy consumption of the refrigerator due to excessive speed of the compressor 31. The frequency of the compressor 31 is adjustable, and after the compressor 31 is started, the frequency of the compressor 31 can be adjusted according to the change of the heat load of the refrigerator.

[0068] In addition, if Figure 2 As shown, a mounting cavity 15 is further formed at the lower end of the housing 1. The compressor 31 and the first condenser 32 can be arranged in the mounting cavity 15, and the second condenser 33 can be arranged in the interlayer at the back of the housing 1.

[0069] It should be noted that the throttling device 34 can be a capillary tube, a thermal expansion valve, an electric expansion valve, etc.

[0070] Since the refrigerant releases heat during the condensation process in the first condenser 32 , the temperature of the condenser will increase, which will affect the condensation effect and temperature of the refrigerant, and further affect the refrigeration effect of the refrigeration system 3 .

[0071] Therefore, in order to improve the refrigeration effect of the refrigeration system 3, as Figure 2 As shown, the refrigerator further includes a condensing fan 4. The condensing fan 4 can be arranged in the installation cavity 15 and located on one side of the first condenser 32. The condensing fan 4 is used to blow air to the first condenser 32 to cool and dissipate heat of the first condenser 32, thereby improving the condensation effect of the first condenser 32 on the refrigerant.

[0072] On this basis, in order to avoid the refrigerant flowing out of the first condenser 32 having more liquid refrigerant components and affecting the condensation effect of the second condenser 33, as shown in FIG. Figure 8 As shown, the refrigerator further includes a gas-liquid separator 5. Fig. 9 As shown, the gas-liquid separator 5 has an inlet (such as Fig. 9 The inlet P in the embodiment includes a gas outlet 51 and a liquid outlet 52.

[0073] The gas-liquid separator 5 is connected in series to the circulation loop, and the inlet of the gas-liquid separator 5 is connected to the outlet of the first condenser 32 , the gas outlet 51 of the gas-liquid separator 5 is connected to the inlet of the second condenser 33 , and the liquid outlet 52 of the gas-liquid separator 5 is connected between the second condenser 33 and the throttling device 34 .

[0074] The above arrangement allows the refrigerant condensed by the first condenser 32 to enter the gas-liquid separator 5 before entering the second condenser 33, so that the liquid refrigerant and the gaseous refrigerant entering the gas-liquid separator 5 can be separated into layers. The separated gaseous refrigerant enters the second condenser 33 through the gaseous outlet 51 of the gas-liquid separator 5 for further condensation, and the liquid refrigerant flows out through the liquid outlet 52 of the gas-liquid separator 5 to merge with the refrigerant condensed by the second condenser 33 and enter the throttling device 34.

[0075] In this way, the amount of liquid refrigerant entering the second condenser 33 can be reduced, thereby increasing the dryness of the refrigerant entering the second condenser 33, so that the second condenser 33 condenses more gaseous refrigerant into liquid refrigerant, thereby reducing the amount of gaseous refrigerant entering the evaporator 35, thereby improving the heat exchange effect of the evaporator 35 and improving the energy efficiency of the refrigerator.

[0076] At this time, in order to reasonably control the amount of gaseous refrigerant entering the second condenser 33, as shown in FIG. Figure 6 As shown, the refrigerator further includes an electric liquid separation valve 6. The liquid outlet 52 of the gas-liquid separator 5 is connected between the second condenser 33 and the throttling device 34 through the electric liquid separation valve 6.

[0077] That is, the inlet of the electric liquid-separating valve 6 is connected to the liquid outlet 52 of the gas-liquid separator 5, and the outlet of the electric liquid-separating valve 6 is connected between the second condenser 33 and the throttling device 34. The electric liquid-separating valve is used to adjust the refrigerant flow rate of the liquid outlet 52 of the gas-liquid separator.

[0078] And, if Fig.10 As shown, the refrigerator also includes a controller 7, which is connected to the electric liquid separator 6. The controller 7 is configured to: obtain current content information of the liquid refrigerant in the gas-liquid separator 5; and control the operation of the electric liquid separator 6 according to the current content information to reduce the amount of liquid refrigerant entering the second condenser 33.

[0079] The operation of the electric liquid separator 6 is controlled by the controller 7 according to the amount of liquid refrigerant in the gas-liquid separator 5. When the liquid refrigerant in the gas-liquid separator 5 is less, the electric liquid separator 6 can be adjusted down or closed to prevent the gaseous refrigerant from flowing out of the liquid outlet of the gas-liquid separator 5, thereby ensuring the amount of gaseous refrigerant entering the second condenser 33 to ensure the condensation effect of the first condenser 32 and the second condenser 33 on the refrigerant.

[0080] When there is a lot of liquid refrigerant in the gas-liquid separator 5, the electric liquid separator 6 can be adjusted to be larger or fully opened to reduce the amount of liquid refrigerant entering the second condenser 33, thereby increasing the dryness of the refrigerant in the second condenser 33 and further improving the condensation heat exchange effect of the second condenser 33.

[0081] The condensation effect of the first condenser 32 and the second condenser 33 is increased, so that the amount of gaseous refrigerant in the refrigerant entering the evaporator 35 can be reduced, thereby improving the evaporation effect of the refrigerant in the evaporator 35, and further improving the heat exchange effect between the evaporator 35 and the air in the freezing air duct 12, so as to improve the energy efficiency of the refrigerator.

[0082] In addition, in order to improve the dryness and cleanliness of the refrigerant entering the evaporator 35, as Figure 8 As shown, the refrigeration system 3 further includes a filter dryer 37. The filter dryer 37 is connected in series to the pipeline between the electric liquid separator 6 and the throttling device 34. The liquid refrigerant in the gas-liquid separator 5 first flows through the filter dryer 37 before entering the throttling device 34, so that the filter dryer 37 removes moisture and impurities in the liquid refrigerant to ensure that the refrigerant is dry and clean, thereby improving the refrigeration effect of the refrigeration system 3.

[0083] In some embodiments, the content information of the liquid refrigerant in the gas-liquid separator 5 can be obtained by setting a liquid level sensor in the gas-liquid separator 5, or can be determined by the parameters of the refrigeration system 3.

[0084] Here, the content information of the liquid refrigerant in the gas-liquid separator 5 is determined by the parameters of the refrigeration system 3 as an example for explanation.

[0085] When the speed of the condensing fan 4 is high, the condensing effect of the first condenser 32 is better, and the liquid refrigerant after condensation is more; when the speed of the condensing fan 4 is low, the condensing effect of the first condenser 32 is poor, and the liquid refrigerant after condensation is less.

[0086] In addition, the changes in the outlet temperature of the gas-liquid separator 5 and the ambient temperature can also reflect the amount of gaseous refrigerant in the gas-liquid separator 5. Therefore, the amount of liquid refrigerant in the gas-liquid separator 5 can be determined by the rotation speed of the condensing fan 4 and the temperature difference between the outlet temperature of the gas-liquid separator 5 and the ambient temperature.

[0087] Specifically, Fig.11 As shown, the refrigerator further includes a speed sensor 8, a first temperature sensor 9 and a second temperature sensor 10. The speed sensor 8 is used to detect the speed of the condensing fan 4; the first temperature sensor 9 is arranged at the gas outlet 51 of the gas-liquid separator 5, and is used to detect the outlet temperature of the gas-liquid separator 5; the second temperature sensor 10 is arranged outside the refrigerator, and is used to detect the ambient temperature.

[0088] The controller 7 is connected to the rotation speed sensor 8 , the first temperature sensor 9 and the second temperature sensor 10 .

[0089] The controller 7 executes to obtain the current content information of the liquid refrigerant in the gas-liquid separator 5, and is configured to: obtain the current rotation speed of the condensing fan 4; obtain the current outlet temperature of the gas-liquid separator 5 and the current ambient temperature of the external environment of the refrigerator, and calculate the current temperature difference between the current outlet temperature and the current ambient temperature; determine the current content information corresponding to the current rotation speed and the current temperature difference according to a preset mapping relationship, and the mapping relationship is used to indicate different content information corresponding to different rotation speeds and different temperature differences.

[0090] That is to say, the corresponding relationship between different rotational speeds and different temperature differences and different content information is set in advance. In this way, after detecting the rotational speed of the condensing fan 4 and calculating the temperature difference between the outlet temperature of the gas-liquid separator 5 and the ambient temperature, the content of the liquid refrigerant in the gas-liquid separator 5 can be quickly obtained according to the corresponding relationship set in advance, so as to facilitate timely adjustment of the electric liquid separator 6.

[0091] Among them, the mapping relationship between different speeds and different temperature differences and different content information can be a linear relationship (i.e., a functional relationship). At this time, as long as the speed of the condensing fan 4 and the temperature difference between the outlet temperature of the gas-liquid separator 5 and the ambient temperature are determined, the content of liquid refrigerant in the gas-liquid separator 5 can be obtained through the functional relationship.

[0092] The mapping relationship between different rotation speeds, different temperature differences and different content information can also be formed by dividing the rotation speed of the condensing fan 4 into multiple intervals, and dividing the temperature difference between the outlet temperature of the gas-liquid separator 5 and the ambient temperature into multiple intervals.

[0093] Specifically, the controller 7 executes according to a preset mapping relationship to determine the current content information corresponding to the current speed and the current temperature difference, and is configured to: determine the target speed range in which the current speed of the condensing fan 4 is located, and the target speed range is one of multiple preset speed ranges; determine the target temperature difference range in which the current temperature difference is located, and the target temperature difference range is one of multiple preset temperature difference ranges corresponding to the target speed range; determine the current content information according to the target temperature difference range, and the current content information is one of multiple preset content information, wherein one preset temperature difference range corresponds to one preset content information.

[0094] The range between the minimum speed and the maximum speed of the condensing fan 4 can be divided into multiple intervals to form multiple preset speed intervals. Since the speed of the condensing fan 4 in different preset speed intervals is different, the division ranges of the multiple preset temperature difference intervals corresponding to different preset speed intervals are different.

[0095] For each preset speed interval, the range of the temperature difference between the outlet temperature of the gas-liquid separator 5 and the ambient temperature is divided into multiple preset temperature difference intervals, that is, one preset speed interval corresponds to multiple preset temperature difference intervals; in addition, among all the preset temperature difference intervals corresponding to all the preset temperature difference intervals, each preset temperature difference interval corresponds to a preset content information.

[0096] Table 1

[0097]

[0098] Exemplarily, Table 1 shows the corresponding relationship between the preset speed range R, the preset temperature difference range D and the preset content information.

[0099] As shown in Table 1, when the preset speed range is 0r / min≤R<800r / min, the preset speed range can correspond to two preset temperature difference ranges, one preset temperature difference range is D<15℃, and the corresponding preset content information is multiple; the other preset temperature difference range is D≥15℃, and the corresponding preset content information is small. That is to say, when the preset speed range is greater than or equal to 0r / min and less than 800r / min, if the preset temperature difference range is less than 15℃, it means that the content of liquid refrigerant in the gas-liquid separator 5 is small, and if the preset temperature difference range is greater than or equal to 15℃, it means that the content of liquid refrigerant in the gas-liquid separator 5 is large.

[0100] When the preset speed range is 800r / min≤R<1000r / min, the preset speed range can correspond to three preset temperature difference ranges, namely D<10℃, 10℃≤D<15℃, and D≥15℃; when the preset temperature difference range is D<10℃, the corresponding preset content information is more, when the preset temperature difference range is 10℃≤D<15℃, the corresponding preset content information is medium, and when the preset temperature difference range is D≥15℃, the corresponding preset content information is less.

[0101] When the preset speed range is 1000r / min≤R<1140r / min, the preset speed range can correspond to three preset temperature difference ranges, namely D<5℃, 5℃≤D<10℃, and D≥10℃; when the preset temperature difference range is D<5℃, the corresponding preset content information is more, when the preset temperature difference range is 5℃≤D<10℃, the corresponding preset content information is medium, and when the preset temperature difference range is D≥10℃, the corresponding preset content information is less.

[0102] When the preset speed range is R≥1140r / min, the preset speed range can correspond to two preset temperature difference ranges, one preset temperature difference range is 0℃≤D<5℃, and the corresponding preset content information is more; the other preset temperature difference range is D≥5℃, and the corresponding preset content information is less.

[0103] After the preset mapping relationship is set, the current speed of the condensing fan 4 can be detected by the speed sensor 8, and then the current speed can be compared with the preset mapping relationship to determine the target temperature difference range where the current temperature difference is located.

[0104] Then, the current temperature difference between the inlet temperature of the gas-liquid separator 5 and the ambient temperature is compared with a plurality of preset temperature difference intervals corresponding to the determined target temperature difference to determine the target temperature difference interval in which the current temperature difference lies.

[0105] Finally, according to the preset content information corresponding to the determined preset temperature difference interval, the preset content information corresponding to the target temperature difference interval can be determined, thereby determining the current content information corresponding to the target temperature difference.

[0106] In some embodiments, the controller 7 controls the operation of the electric liquid-dispensing valve 6 according to the current content information, and is configured to: determine the target control strategy corresponding to the current content information according to the correspondence between different preset content information and different control strategies of the electric liquid-dispensing valve 6; and control the electric liquid-dispensing valve 6 to operate according to the target control strategy.

[0107] Exemplarily, the electric liquid-distributing valve 6 can be an electric regulating valve, such as an electric butterfly valve, an electric ball valve, etc. In this case, the mapping relationship between different rotation speeds and different temperature differences and different content information can be a linear relationship, and the corresponding relationship between the preset different content information and the different control strategies of the electric liquid-distributing valve 6 can be a linear relationship.

[0108] At this time, the control strategy can be to adjust the opening of the electric liquid-separating valve 6, that is, to make the content information of the liquid refrigerant in the gas-liquid separator 5 linearly related to the opening of the electric liquid-separating valve 6, so that after obtaining the content information of the liquid refrigerant in the gas-liquid separator 5, the opening of the electric liquid-separating valve 6 can be obtained through the linear relationship, and the electric liquid-separating valve 6 can be controlled to open to the corresponding opening.

[0109] Exemplarily, the electric liquid-dispensing valve 6 can also be a solenoid valve. In this case, the mapping relationship between different rotational speeds and different temperature differences and different content information can be a corresponding relationship between a preset rotational speed range, a preset temperature difference range and a preset content information, and the corresponding relationship between the preset different content information and the different control strategies of the electric liquid-dispensing valve 6 can be: multiple preset control strategies are set in advance, so that one preset content information corresponds to one preset control strategy.

[0110] In this way, after obtaining the target content information, the target control strategy of the electric liquid separating valve 6 can be obtained according to the correspondence between the preset content information and the preset control strategy, so that the operation of the electric liquid separating valve 6 can be controlled according to the target control strategy.

[0111] Since the solenoid valve has only two states: fully open and fully closed, the control strategy of the electric liquid dispensing valve 6 can be a fully open solenoid valve, a fully closed solenoid valve, or a solenoid valve that is cyclically switched on and off according to a preset period, and one control strategy is one of a fully open solenoid valve, a fully closed solenoid valve, or a solenoid valve that is cyclically switched on and off according to a preset period.

[0112] Since the amount of liquid refrigerant in the gas-liquid separator 5 is different when the condensing fan 4 is in different speed ranges and the temperature difference between the outlet temperature of the gas-liquid separator 5 and the ambient temperature is in different temperature difference ranges, the control strategy of the electric liquid separator 6 is to cyclically switch the solenoid valve according to a preset cycle. In the control strategies corresponding to different speed ranges and different temperature difference ranges, the preset cycles may be the same or different, and the duration of opening the solenoid valve and the duration of closing the solenoid valve within a preset cycle may be the same or different.

[0113] For example, Table 2 shows the corresponding relationship between the preset speed range R, the preset temperature difference range D and the preset content information, and the corresponding relationship between the preset content information and the preset control strategy.

[0114] Table 2

[0115]

[0116] As shown in Table 2, when the preset speed range is 0r / min≤R<800r / min, if the preset temperature difference range is D<15℃, the preset control strategy corresponding to the preset content information is a fully open solenoid valve; if the preset temperature difference range is D≥15℃, the preset control strategy corresponding to the preset content information is a fully closed solenoid valve.

[0117] When the preset speed range is 800r / min≤R<1000r / min, if the preset temperature difference range is D<10℃, the preset control strategy corresponding to the preset content information is to fully open the solenoid valve; if the preset temperature difference range is 10℃≤D<15℃, the preset control strategy corresponding to the preset content information is to cyclically switch the solenoid valve according to the preset cycle, and open the solenoid valve for 1min and close the solenoid valve for 1min within a preset cycle; if the preset temperature difference range is D≥15℃, the preset control strategy corresponding to the preset content information is to fully close the solenoid valve.

[0118] When the preset speed range is 1000r / min≤R<1140r / min, if the preset temperature difference range is D<5℃, the preset control strategy corresponding to the preset content information is to fully open the solenoid valve; if the preset temperature difference range is 5℃≤D<10℃, the preset control strategy corresponding to the preset content information is to cyclically switch the solenoid valve according to the preset cycle, and open the solenoid valve for 2 minutes and close the solenoid valve for 1 minute within a preset cycle; if the preset temperature difference range is D≥10℃, the preset control strategy corresponding to the preset content information is to fully close the solenoid valve.

[0119] When the preset speed range is R≥1140r / min, if the preset temperature difference range is 0℃≤D<5℃, the preset control strategy corresponding to the preset content information is a fully open solenoid valve; if the preset temperature difference range is D≥5℃, the preset control strategy corresponding to the preset content information is a fully closed solenoid valve.

[0120] By corresponding a preset content information to a preset control strategy, after obtaining the current content information of the liquid refrigerant in the gas-liquid separator 5, the target control strategy of the electric liquid separator valve 6 can be quickly obtained, so that the electric liquid separator valve 6 can be adjusted in time to improve the condensation effect of the second condenser 33.

[0121] The embodiment of the present application also provides a refrigerator control method, such as Fig.12 As shown, the control method includes:

[0122] S1: Obtaining the current content information of the liquid refrigerant in the gas-liquid separator 5;

[0123] S2: Controlling the operation of the electric liquid separation valve 6 according to the current content information to reduce the amount of liquid refrigerant entering the second condenser 33 .

[0124] By controlling the operation of the electric liquid separator 6 according to the current content information of the liquid refrigerant in the gas-liquid separator 5, the amount of gaseous refrigerant entering the second condenser 33 can be guaranteed, while reducing the amount of liquid refrigerant entering the second condenser 33 to improve the condensation effect of the second condenser 33.

[0125] In some embodiments, Fig.13 As shown, obtaining the current content information of the liquid refrigerant in the gas-liquid separator 5 includes:

[0126] S11: Obtain the current rotation speed of the condensing fan 4;

[0127] S12: obtaining the current outlet temperature of the gas-liquid separator 5 and the current ambient temperature of the external environment of the refrigerator, and calculating the current temperature difference between the current outlet temperature and the current ambient temperature;

[0128] S13: determining the current content information corresponding to the current rotation speed and the current temperature difference according to a preset mapping relationship, wherein the mapping relationship is used to indicate different content information corresponding to different rotation speeds and different temperature differences.

[0129] It should be noted that step S11 and step S12 may be performed simultaneously, or step S11 may be performed first and then step S12, or step S12 may be performed first and then step S11.

[0130] Among them, Fig.14 As shown, according to the preset mapping relationship, determining the current content information corresponding to the current speed and the current temperature difference includes:

[0131] S131: determining a target speed interval in which the current speed of the condensing fan 4 is located, where the target speed interval is one of a plurality of preset speed intervals;

[0132] S132: Determine the target temperature difference interval where the current temperature difference is located, where the target temperature difference interval is one of a plurality of preset temperature difference intervals corresponding to the target speed interval;

[0133] S133: Determine current content information according to the target temperature difference interval, where the current content information is one of a plurality of preset content information, wherein one preset temperature difference interval corresponds to one preset content information.

[0134] For example, the division of the preset speed range and the preset temperature difference range, and the corresponding relationship with the preset content information are shown in Table 1. Fig.15 As shown, the whole process of the refrigerator control method is:

[0135] Get the current speed of the condensing fan 4;

[0136] Obtaining the current outlet temperature of the gas-liquid separator 5 and the current ambient temperature of the external environment of the refrigerator, and calculating the current temperature difference between the current outlet temperature and the current ambient temperature;

[0137] Determine the target speed range in which the current speed of the condensing fan 4 lies;

[0138] If the target speed range is 0r / min≤R<800r / min, then determine the target temperature difference range where the current temperature difference is located at this time. If the target temperature difference range is D<15°C, then determine that the current content information is more; if the target temperature difference range is D≥15°C, then determine that the current content information is less;

[0139] If the target speed range is 800r / min≤R<1000r / min, the target temperature difference range of the current temperature difference is determined. If the target temperature difference range is D<10℃, the current content information is determined to be high. If the target temperature difference range is 10℃≤D<15℃, the current content information is determined to be medium. If the target temperature difference range is D≥15℃, the current content information is determined to be low.

[0140] If the target speed range is 1000r / min≤R<1140r / min, the target temperature difference range of the current temperature difference is determined. If the target temperature difference range is D<5℃, the current content information is determined to be high. If the target temperature difference range is 5℃≤D<10℃, the current content information is determined to be medium. If the target temperature difference range is D≥10℃, the current content information is determined to be low.

[0141] If the target speed range is R≥1140r / min, the target temperature difference range in which the current temperature difference is located is determined. If the target temperature difference range is 0℃≤D<5℃, the current content information is determined to be high. If the target temperature difference range is D≥5℃, the current content information is determined to be low.

[0142] After the current content information of the liquid refrigerant in the gas-liquid separator 5 is determined, the operation of the electric liquid separation valve 6 is controlled according to the current content information.

[0143] In some embodiments, Fig.16 As shown, controlling the operation of the electric liquid separation valve 6 according to the current content information includes:

[0144] S21: Determine a target control strategy corresponding to the current content information according to the correspondence between different preset content information and different control strategies of the electric liquid separation valve 6;

[0145] S22: Control the electric liquid dispensing valve 6 to operate according to the target control strategy.

[0146] For example, the division of the preset speed range and the preset temperature difference range, and the corresponding relationship with the preset content information and the preset control strategy are shown in Table 2. Fig.17 As shown, the whole process of the refrigerator control method is:

[0147] Get the current speed of the condensing fan 4;

[0148] Obtaining the current outlet temperature of the gas-liquid separator 5 and the current ambient temperature of the external environment of the refrigerator, and calculating the current temperature difference between the current outlet temperature and the current ambient temperature;

[0149] Determine the target speed range in which the current speed of the condensing fan 4 lies;

[0150] If the target speed range is 0r / min≤R<800r / min, then determine the target temperature difference range where the current temperature difference is located. If the target temperature difference range is D<15℃, then determine that the current content information is more, and the corresponding target control strategy is to fully open the solenoid valve; if the target temperature difference range is D≥15℃, then determine that the current content information is less, and the corresponding target control strategy is to fully close the solenoid valve;

[0151] If the target speed range is 800r / min≤R<1000r / min, then determine the target temperature difference range in which the current temperature difference is located. If the target temperature difference range is D<10℃, then determine that the current content information is more, and the corresponding target control strategy is to fully open the solenoid valve; if the target temperature difference range is 10℃≤D<15℃, then determine that the current content information is medium, and the corresponding target control strategy is to cyclically switch the solenoid valve according to the preset cycle, and open the solenoid valve for 1min and close the solenoid valve for 1min in a preset cycle; if the target temperature difference range is D≥15℃, then determine that the current content information is less, and the corresponding target control strategy is to fully close the solenoid valve;

[0152] If the target speed range is 1000r / min≤R<1140r / min, then determine the target temperature difference range in which the current temperature difference is located at this time. If the target temperature difference range is D<5℃, then determine that the current content information is more, and the corresponding target control strategy is to fully open the solenoid valve; if the target temperature difference range is 5℃≤D<10℃, then determine that the current content information is medium, and the corresponding target control strategy is to cyclically switch the solenoid valve according to the preset cycle, and open the solenoid valve for 2 minutes and close the solenoid valve for 1 minute in a preset cycle; if the target temperature difference range is D≥10℃, then determine that the current content information is less, and the corresponding target control strategy is to fully close the solenoid valve;

[0153] If the target speed range is R≥1140r / min, then determine the target temperature difference range in which the current temperature difference is located. If the target temperature difference range is 0℃≤D<5℃, then determine that the current content information is more, and the corresponding target control strategy is to fully open the solenoid valve; if the target temperature difference range is D≥5℃, then determine that the current content information is less, and the corresponding target control strategy is to fully close the solenoid valve.

[0154] Although the present application is described herein in conjunction with various embodiments, in the process of implementing the present application for which protection is claimed, those skilled in the art may understand and implement other variations of the disclosed embodiments by viewing the drawings, the disclosure, and the appended claims. In the claims, the word "comprise" does not exclude other components or steps, and "one" or "an" does not exclude multiple situations. A single processor or other unit may implement several functions listed in a claim. Certain measures are recorded in mutually different dependent claims, but this does not mean that these measures cannot be combined to produce good results.

[0155] Although the present application has been described in conjunction with specific features and embodiments thereof, it is obvious that various modifications and combinations may be made thereto without departing from the spirit and scope of the present application. Accordingly, this specification and the drawings are merely exemplary illustrations of the present application as defined by the appended claims, and are deemed to have covered any and all modifications, variations, combinations or equivalents within the scope of the present application. Obviously, those skilled in the art may make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

[0156] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A refrigerator, characterized in that: include: A box body, wherein a storage chamber for storing food is formed in the box body; A refrigeration system for refrigerating the storage room, the refrigeration system comprising a compressor, a first condenser, a second condenser, a throttling device and an evaporator which are sequentially connected through a pipeline to form a circulation loop of a refrigerant; A gas-liquid separator, wherein the gas-liquid separator is connected in series to the circulation loop, and the inlet of the gas-liquid separator is connected to the outlet of the first condenser, the gaseous outlet of the gas-liquid separator is connected to the inlet of the second condenser, and the liquid outlet of the gas-liquid separator is connected between the second condenser and the throttling device.

2. The refrigerator according to claim 1, characterized in that: The refrigerator further comprises: An electric liquid-separating valve, wherein the liquid outlet of the gas-liquid separator is connected between the second condenser and the throttling device through the electric liquid-separating valve, and the electric liquid-separating valve is used to adjust the refrigerant flow rate of the liquid outlet of the gas-liquid separator; A controller is connected to the electric liquid separation valve and is configured as follows: Obtaining current content information of the liquid refrigerant in the gas-liquid separator; The electric liquid separation valve is controlled to operate according to the current content information to reduce the amount of liquid refrigerant entering the second condenser.

3. The refrigerator according to claim 2, characterized in that: The refrigerator further comprises: A condensing fan, which is arranged at one side of the first condenser and is used to blow air toward the first condenser; A rotation speed sensor, the rotation speed sensor is used to detect the rotation speed of the condensing fan; a first temperature sensor, the first temperature sensor being disposed at the gaseous outlet of the gas-liquid separator and being used to detect the outlet temperature of the gas-liquid separator; a second temperature sensor, the second temperature sensor being disposed outside the refrigerator and used for detecting an ambient temperature; The controller executes the step of obtaining the current content information of the liquid refrigerant in the gas-liquid separator, and is configured as follows: Obtaining the current speed of the condensing fan; Acquire the current outlet temperature of the gas-liquid separator and the current ambient temperature of the external environment of the refrigerator, and calculate the current temperature difference between the current outlet temperature and the current ambient temperature; According to a preset mapping relationship, current content information corresponding to the current rotation speed and the current temperature difference is determined, and the mapping relationship is used to indicate different content information corresponding to different rotation speeds and different temperature differences.

4. The refrigerator according to claim 3, characterized in that: The controller performs the step of determining the current content information corresponding to the current rotation speed and the current temperature difference according to the preset mapping relationship, and is configured as follows: Determine a target speed interval in which the current speed of the condensing fan is located, wherein the target speed interval is one of a plurality of preset speed intervals; Determine a target temperature difference interval in which the current temperature difference lies, the target temperature difference interval being one of a plurality of preset temperature difference intervals corresponding to the target speed interval; The current content information is determined according to the target temperature difference interval, and the current content information is one of a plurality of preset content information, wherein one preset temperature difference interval corresponds to one preset content information.

5. The refrigerator according to any one of claims 2 to 4, characterized in that: The refrigeration system further comprises a drying filter, which is connected in series on the pipeline between the electric liquid separation valve and the throttling device; and / or, The controller performs the step of controlling the operation of the electric liquid separation valve according to the current content information, and is configured as follows: Determine a target control strategy corresponding to the current content information according to a correspondence between different preset content information and different control strategies of the electric liquid separation valve; The electric liquid separation valve is controlled to operate according to the target control strategy.

6. The refrigerator according to claim 5, characterized in that: The electric liquid separation valve is a solenoid valve; One control strategy is one of fully opening the solenoid valve, fully closing the solenoid valve, and cyclically opening and closing the solenoid valve according to a preset period.

7. The refrigerator according to claim 4, characterized in that: The plurality of preset speed intervals are formed by dividing the range between the minimum speed and the maximum speed of the condensing fan into a plurality of intervals, and the division ranges of the plurality of preset temperature difference intervals corresponding to different preset speed intervals are different.

8. A refrigerator control method, characterized in that: include: Obtaining current content information of liquid refrigerant in the gas-liquid separator; The electric liquid separation valve is controlled to operate according to the current content information to reduce the amount of liquid refrigerant entering the second condenser.

9. The refrigerator control method according to claim 8, characterized in that: The obtaining of the current content information of the liquid refrigerant in the gas-liquid separator includes: Get the current speed of the condensing fan; Obtaining the current outlet temperature of the gas-liquid separator and the current ambient temperature of the external environment of the refrigerator, and calculating the current temperature difference between the current outlet temperature and the current ambient temperature; According to a preset mapping relationship, current content information corresponding to the current rotation speed and the current temperature difference is determined, and the mapping relationship is used to indicate different content information corresponding to different rotation speeds and different temperature differences.

10. The refrigerator control method according to claim 8 or 9, characterized in that: The controlling the operation of the electric liquid separation valve according to the current content information comprises: Determine a target control strategy corresponding to the current content information according to a correspondence between different preset content information and different control strategies of the electric liquid separation valve; The electric liquid separation valve is controlled to operate according to the target control strategy.

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