Refrigerator, control method for refrigerator, and storage medium

Abstract

Provided are a refrigerator (10), a control method for a refrigerator (10), and a storage medium. The refrigerator (10) comprises a refrigerator body (101), a refrigeration system (103), and a controller; the refrigerator body (101) is provided with a refrigerating chamber and a freezing chamber; the refrigeration system (103) comprises a compressor (31), a condenser (32), a first evaporator (33), a second evaporator (34), a defrosting heater (36), a first electric valve (35), a second electric valve (37), a first throttling device (39), and a controller. The controller is configured to: when it is detected that the first evaporator (33) has a defrosting requirement, control the compressor (31) to shut down; acquire the ambient temperature of an environment where the refrigerator (10) is located; if it is determined that the ambient temperature is smaller than a first preset value, control a first inlet (a1) and a second outlet (a3) of the first electric valve (35) to be opened; and control the compressor (31) to start.

Description

Refrigerator, control method of refrigerator and storage medium

[0001] The present application claims priority to the patent application No. 202411045682.8 filed on July 31, 2024, the patent application No. 202411220966.6 filed on August 30, 2024, the patent application No. 202422140014.5 filed on August 30, 2024, and the Chinese patent application No. 202411219293.2 filed on August 30, 2024, the contents of which are incorporated herein by reference in their entirety. TECHNICAL FIELD

[0002] The present disclosure relates to the technical field of household appliances, in particular to a refrigerator, a control method of refrigerator and a storage medium. BACKGROUND

[0003] With the development of society and the continuous improvement of people's living standards, people's life rhythm is getting faster and faster, so they are more and more willing to buy a lot of food to put in the refrigerator. The refrigerator has become one of the indispensable household appliances in people's daily life.

[0004] SUMMARY

[0005] When the refrigerator is in the refrigeration mode, the surface of the finned evaporator of the refrigerator will frost when the surface temperature of the finned evaporator is lower than the air dew point temperature and lower than 0℃. With the increase of the thickness of the frost layer, defrosting treatment needs to be performed to avoid frost blockage of the finned evaporator, affect the heat exchange efficiency, and cause the temperature of the compartment of the refrigerator to rise.

[0006] The present disclosure provides a refrigerator, a control method of refrigerator and a storage medium, which can be used for defrosting the frost on the evaporator to improve the defrosting efficiency and defrosting reliability.

[0007] In a first aspect, some embodiments of the present disclosure provide a refrigerator, comprising a cabinet, a refrigeration system and a controller.

[0008] The box is configured with a refrigeration chamber and a freezing chamber; a refrigeration system is arranged in the box, and the refrigeration system comprises a compressor, a condenser, a first evaporator, a second evaporator, a defrosting heater, a first electric valve, a second electric valve, a first throttling device and a controller. The compressor comprises an exhaust port and an intake port. The condenser comprises an inlet and an outlet. The first evaporator is used for refrigerating the refrigeration chamber and comprises an inlet and an outlet. The second evaporator is used for refrigerating the freezing chamber and comprises an inlet and an outlet. The defrosting heater pipe is arranged at the bottom of the first evaporator. The first throttling device is arranged between the first evaporator and the second evaporator. Here, the exhaust port of the compressor is in communication with the first inlet of the first electric valve, the condenser is in communication with the first outlet of the first electric valve, the second outlet of the first electric valve is in communication with the first throttling device through the defrosting heater pipe; the condenser is in communication with the second inlet of the second electric valve, the third outlet of the second electric valve is in communication with the first evaporator, and the fourth outlet of the second electric valve is in communication with the second evaporator; the outlet of the first evaporator and the outlet of the second evaporator are in communication with the intake port of the compressor;

[0009] The controller is electrically connected with the refrigeration system and is configured to: in the case that it is detected that the first evaporator has a defrosting demand, control the compressor to stop; acquire an ambient temperature of an environment in which the refrigerator is located; if it is determined that the ambient temperature is less than a first preset value, control the first inlet and the second outlet of the first electric valve to be opened, control the fifth outlet of the third electric valve to be opened, and control at least one of the third outlet or the fourth outlet of the second electric valve to be opened; and control the compressor to start.

[0010] In some embodiments, when the ambient temperature is low, the refrigerant flowing out of the defrosting heater pipe flows to the condenser through the throttling device, and the refrigerant flowing out of the condenser does not pass through the evaporator of the refrigeration chamber or passes through the evaporator of the refrigeration chamber when the refrigerant is in a gaseous state and thus does not perform refrigeration, thereby reducing the influence of defrosting on the temperature of the refrigeration chamber.

[0011] In a second aspect, the present disclosure provides a control method of a refrigerator, the refrigerator comprising a box, a refrigeration system and a controller.

[0012] The box comprises a refrigeration chamber and a freezing chamber;

[0013] A refrigeration system is arranged in the cabinet, and the refrigeration system comprises a compressor, a condenser, a first evaporator, a second evaporator, a first electric valve, a second electric valve, a third electric valve and a controller. The compressor comprises an exhaust port and an intake port. The condenser comprises an inlet and an outlet. The first evaporator is used for refrigerating the freezer compartment and comprises an inlet and an outlet. The second evaporator is used for refrigerating the refrigerator compartment and comprises an inlet and an outlet. The first electric valve comprises a first inlet, a first outlet and a second outlet. The second electric valve comprises a second inlet, a third outlet and a fourth outlet. The third electric valve comprises a third inlet, a fifth outlet and a sixth outlet. Here, the exhaust port of the compressor is in communication with the first inlet of the first electric valve, the condenser is in communication with the first outlet of the first electric valve, the second outlet of the first electric valve is in communication with the third inlet of the third electric valve through a defrosting heating pipe arranged in a zigzag manner at the bottom of the first evaporator; the fifth outlet of the third electric valve is in communication with the second evaporator through a first throttling device, the sixth outlet of the third electric valve is in communication with the inlet of the condenser through a second throttling device; the condenser is in communication with the second inlet of the second electric valve, the third outlet of the second electric valve is in communication with the first evaporator, and the fourth outlet of the second electric valve is in communication with the second evaporator; the outlet of the first evaporator and the outlet of the second evaporator are in communication with the intake port of the compressor.

[0014] The method comprises: when it is detected that the first evaporator has a defrosting demand, controlling the compressor to stop; acquiring an ambient temperature of an environment in which the refrigerator is located; if it is determined that the ambient temperature is less than a first preset value, controlling the first inlet and the second outlet of the first electric valve to be opened, controlling the sixth outlet of the third electric valve to be opened, and controlling at least one of the third outlet or the fourth outlet of the second electric valve to be opened; controlling the compressor to start, so that the refrigeration system enters a defrosting mode; and if the ambient temperature is greater than or equal to the first preset value, controlling the first inlet, the second outlet of the first electric valve and the fifth outlet of the third electric valve to be opened, and controlling the compressor to start, so that the refrigeration system enters the defrosting mode.

[0015] In some embodiments, when the ambient temperature is low, the refrigerant flowing out of the defrosting heating pipe is controlled to flow to the condenser through the throttling device, and the refrigerant flowing out of the condenser does not pass through the evaporator of the refrigerator compartment or passes through the evaporator of the refrigerator compartment when the refrigerant is in a gaseous state and thus does not perform refrigeration, thereby reducing the influence of defrosting on the temperature of the refrigerator compartment.

[0016] In a third aspect, the disclosure also provides a control method of a refrigerator, the refrigerator comprising a cabinet, a refrigeration system and a controller.

[0017] The cabinet comprises a refrigerator compartment and a freezer compartment.

[0018] A refrigeration system is arranged in the cabinet, and the refrigeration system comprises a compressor, a condenser, a first evaporator, a second evaporator, a first electric valve, a second electric valve, a third electric valve and a controller. The compressor comprises an exhaust port and an intake port. The condenser comprises an inlet and an outlet. The first evaporator is used for refrigerating the freezer compartment and comprises an inlet and an outlet. The second evaporator is used for refrigerating the refrigerating compartment and comprises an inlet and an outlet. The first electric valve comprises a first inlet, a first outlet and a second outlet. The second electric valve comprises a second inlet, a third outlet and a fourth outlet. The third electric valve comprises a third inlet, a fifth outlet and a sixth outlet. Here, the exhaust port of the compressor is in communication with the first inlet of the first electric valve, the condenser is in communication with the first outlet of the first electric valve, the second outlet of the first electric valve is in communication with the third inlet of the third electric valve through a defrosting heating pipe arranged in a zigzag manner at the bottom of the first evaporator; the fifth outlet of the third electric valve is in communication with the second evaporator through a first throttling device, the sixth outlet of the third electric valve is in communication with the inlet of the condenser through a second throttling device; the condenser is in communication with the second inlet of the second electric valve, the third outlet of the second electric valve is in communication with the first evaporator, and the fourth outlet of the second electric valve is in communication with the second evaporator; the outlet of the first evaporator and the outlet of the second evaporator are in communication with the intake port of the compressor;

[0019] The method comprises: in the case where it is detected that the refrigerator has a refrigeration demand, acquiring an ambient temperature of an environment in which the refrigerator is located;

[0020] According to the ambient temperature, the amount of refrigerant participating in the refrigeration cycle in the refrigeration system is adjusted to a target content through the first electric valve, the second electric valve and the third electric valve;

[0021] The fifth outlet and the sixth outlet of the third electric valve are controlled to be closed, the first outlet of the first electric valve is controlled to be opened, and at least one of the third outlet or the fourth outlet of the second electric valve is controlled to be opened;

[0022] If it is determined that the ambient temperature is greater than or equal to a third preset value, the third outlet and the fourth outlet of the second electric valve are controlled to be closed, the second outlet of the first electric valve is controlled to be opened, and the target content reaches a first content;

[0023] If it is determined that the ambient temperature is less than the third preset value, the first inlet, the first outlet and the second outlet of the first electric valve are controlled to be opened, the second inlet, the third outlet and the fourth outlet of the second electric valve are controlled to be opened, and the third inlet, the fifth outlet and the sixth outlet of the third electric valve are controlled to be opened, so that the target content reaches a second content.

[0024] In some embodiments, the amount of refrigerant participating in the refrigeration cycle in the refrigeration system is adjusted by using ambient temperature, a first electric valve, a second electric valve, and a third electric valve to achieve a target content, thereby improving the refrigeration efficiency of the refrigerator and saving energy.

[0025] Fourthly, this disclosure also provides a method for controlling a refrigerator, the refrigerator comprising: a cabinet, a refrigeration system, and a controller.

[0026] The enclosure includes a refrigerator compartment and a freezer compartment;

[0027] A refrigeration system, disposed within the cabinet, includes: a compressor, a condenser, a first evaporator, a second evaporator, a first electric valve, a second electric valve, a third electric valve, and a controller. The compressor includes an exhaust port and an intake port. The condenser includes an inlet and an outlet. The first evaporator is used to refrigerate the freezer compartment and includes an inlet and an outlet. The second evaporator is used to refrigerate the refrigerator compartment and includes an inlet and an outlet. The first electric valve includes a first inlet, a first outlet, and a second outlet. The second electric valve includes a second inlet, a third outlet, and a fourth outlet. The third electric valve includes a third inlet, a fifth outlet, and a sixth outlet. Here, the compressor's exhaust port is connected to the first inlet of the first electric valve, the condenser is connected to the first outlet of the first electric valve, the second outlet of the first electric valve is connected to the third inlet of the third electric valve via a defrosting heating tube that is bent at the bottom of the first evaporator; the fifth outlet of the third electric valve is connected to the second evaporator via a first throttling device, and the sixth outlet of the third electric valve is connected to the inlet of the condenser via a second throttling device; the condenser is connected to the second inlet of the second electric valve, the third outlet of the second electric valve is connected to the first evaporator, and the fourth outlet of the second electric valve is connected to the second evaporator; the outlets of the first evaporator and the second evaporator are connected to the compressor's air inlet.

[0028] The method includes: when the refrigeration system is in rapid refrigeration mode, the compressor operates at a fifth speed, the fourth outlet of the second electric valve is opened, the first outlet of the first electric valve is opened, the third inlet of the third electric valve is closed, and the fifth and sixth outlets of the third electric valve are opened.

[0029] In some embodiments, the refrigerator supports a rapid cooling mode, which refers to the rapid cooling of the refrigerator compartment. Compared with the regular cooling mode, the rapid cooling mode can reach the required cooling temperature of the refrigerator compartment in a shorter time. This method achieves rapid cooling by controlling the compressor to run at a fifth speed, opening the fourth outlet of the second electric valve, opening the first outlet of the first electric valve, closing the third inlet of the third electric valve, and opening the fifth and sixth outlets of the third electric valve.

[0030] Fifthly, this disclosure also provides a method for controlling a refrigerator, the refrigerator comprising: a cabinet, a refrigeration system, and a controller.

[0031] The enclosure includes a refrigerator compartment and a freezer compartment;

[0032] A refrigeration system, disposed within the cabinet, includes: a compressor, a condenser, a first evaporator, a second evaporator, a first electric valve, a second electric valve, a third electric valve, and a controller. The compressor includes an exhaust port and an intake port. The condenser includes an inlet and an outlet. The first evaporator is used to refrigerate the freezer compartment and includes an inlet and an outlet. The second evaporator is used to refrigerate the refrigerator compartment and includes an inlet and an outlet. The first electric valve includes a first inlet, a first outlet, and a second outlet. The second electric valve includes a second inlet, a third outlet, and a fourth outlet. The third electric valve includes a third inlet, a fifth outlet, and a sixth outlet. Here, the compressor's exhaust port is connected to the first inlet of the first electric valve, the condenser is connected to the first outlet of the first electric valve, the second outlet of the first electric valve is connected to the third inlet of the third electric valve via a defrosting heating tube that is bent at the bottom of the first evaporator; the fifth outlet of the third electric valve is connected to the second evaporator via a first throttling device, and the sixth outlet of the third electric valve is connected to the inlet of the condenser via a second throttling device; the condenser is connected to the second inlet of the second electric valve, the third outlet of the second electric valve is connected to the first evaporator, and the fourth outlet of the second electric valve is connected to the second evaporator; the outlets of the first evaporator and the second evaporator are connected to the compressor's air inlet.

[0033] The method includes: controlling the compressor to stop when the refrigeration system exits defrost mode;

[0034] The first electric valve is controlled to connect the passage between the compressor and the condenser, and the third electric valve is used to control the outlet of the defrosting heating tube to close.

[0035] The compressor is controlled to start, and the second electric valve is controlled to perform at least one of the following: connecting the passage between the condenser and the first evaporator, or connecting the passage between the condenser and the second evaporator;

[0036] Determine the time period in which the refrigeration system exits defrost mode, wherein the time period includes a preset time period and a non-preset time period;

[0037] If the time period is determined to be the preset time period, then the third electric valve is controlled to connect the passage between the defrosting heating tube and the second evaporator;

[0038] The third electric valve is controlled to connect the passage between the defrosting heating tube and the second evaporator.

[0039] In some embodiments, by controlling the connection between the compressor and the condenser and controlling the vent of the defrosting heating element to close when the refrigeration system exits defrosting mode, the noise generated by the high-speed operation of the compressor is reduced. Attached Figure Description

[0040] Figure 1 is a schematic diagram of a refrigerator according to some embodiments;

[0041] Figure 2 is a structural schematic diagram of a refrigeration system according to some embodiments;

[0042] Figure 3 is a schematic diagram of the refrigerant flow direction when the refrigeration system according to some embodiments is used to refrigerate the refrigerator compartment in refrigeration mode;

[0043] Figure 4 is a schematic diagram of the refrigerant flow direction when the refrigeration system according to some embodiments is refrigerating the freezer compartment in refrigeration mode;

[0044] Figure 5 is a schematic diagram of the refrigerant flow when the refrigeration system according to some embodiments simultaneously refrigerates the refrigerator compartment and the freezer compartment in refrigeration mode;

[0045] Figure 6A is a schematic diagram of the refrigerant flow in defrost mode of a refrigeration system according to some embodiments;

[0046] Figure 6B is a schematic diagram of the refrigerant flow in defrost mode in another refrigeration system according to some embodiments;

[0047] Figure 7A is a schematic flowchart of a refrigerator control method according to some embodiments;

[0048] Figure 7B is a flowchart illustrating another method for controlling a refrigerator according to some embodiments;

[0049] Figure 8 is a schematic diagram of the refrigerant flow in defrost mode of a refrigeration system according to some embodiments;

[0050] Figure 9 is a flowchart illustrating another method for controlling a refrigerator according to some embodiments;

[0051] Figure 10 is a flowchart illustrating another method for controlling a refrigerator according to some embodiments;

[0052] Figure 11 is a flowchart illustrating another method for controlling a refrigerator according to some embodiments;

[0053] Figure 12 is a flowchart illustrating another method for controlling a refrigerator according to some embodiments;

[0054] Figure 13 is a schematic diagram of the refrigerant flow direction when storing refrigerant in the defrosting heating tube according to some embodiments;

[0055] Figure 14 is a schematic diagram showing the refrigerant flowing through various mechanisms in a refrigeration system according to some embodiments;

[0056] Figure 15 is a flowchart illustrating another method for controlling a refrigerator according to some embodiments;

[0057] Figure 16 is a flowchart illustrating another method for controlling a refrigerator according to some embodiments;

[0058] Figure 17 is a schematic diagram of the refrigerant flow direction when the refrigerant stored in the defrosting heating tube is discharged according to some embodiments;

[0059] Figure 18 is another structural schematic diagram of a refrigeration system according to some embodiments;

[0060] Figure 19 is a schematic diagram of the refrigerant flow in a rapid cooling mode of a refrigeration system according to some embodiments;

[0061] Figure 20 is a schematic diagram of the refrigerant flow in a refrigeration system according to some embodiments, which is in rapid cooling mode and simultaneously cooling the freezer compartment.

[0062] Figure 21 is a flowchart illustrating a noise reduction control method for a refrigerator according to some embodiments;

[0063] Figure 22 is a schematic diagram of the refrigerant flow during the first cooling cycle after the defrosting mode ends in a refrigerator according to some embodiments;

[0064] Figure 23 is a flowchart illustrating another method for noise reduction control of a refrigerator according to some embodiments;

[0065] Figure 24 is a flowchart illustrating another method for noise reduction control of a refrigerator according to some embodiments;

[0066] Figure 25 is a flowchart illustrating another method for noise reduction control of a refrigerator according to some embodiments. Detailed Implementation

[0067] The following description, in conjunction with the accompanying drawings, clearly and completely describes some embodiments of this disclosure. Obviously, the described embodiments are merely some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the embodiments provided in this disclosure are within the scope of protection of this disclosure.

[0068] The use of “applies to” or “configured to” in this article implies an open and inclusive language that does not preclude applicability to or configuration to devices that perform additional tasks or steps.

[0069] Unless the context otherwise requires, in the specification and claims, the term "comprise" and its other forms, such as the third-person singular "comprises" and the present participle "comprising," are interpreted as open-ended and encompassing, meaning "including, but not limited to." In the description of the specification, terms such as "one embodiment," "some embodiments," "exemplary embodiments," "example," "specific example," or "some examples," etc., are intended to indicate that a particular feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of this disclosure. The illustrative representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics mentioned may be included in any suitable manner in any one or more embodiments or examples.

[0070] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0071] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0072] In describing some embodiments, the terms "coupled" and "connected," and their derivative expressions, are used. For example, the term "connected" may be used in describing some embodiments to indicate that two or more components have direct physical or electrical contact with each other. Similarly, the term "coupled" may be used in describing some embodiments to indicate that two or more components have direct physical or electrical contact. However, the terms "coupled" or "communicatively coupled" may also refer to two or more components that do not have direct contact with each other but still cooperate or interact with each other. The embodiments disclosed herein are not necessarily limited to the content of this document.

[0073] When a refrigerator is in cooling mode, frost will form on the surface of the evaporator fins when the surface temperature is below the air dew point temperature and below 0°C. As the frost layer thickens, defrosting is necessary to prevent frost blockage of the evaporator fins, which would affect heat exchange efficiency and cause the refrigerator compartment temperature to rise.

[0074] Frost on the evaporator surface of a refrigerator can be defrosted using electric heating. However, the heater used for electric defrosting has a high body temperature, posing certain risks, and this method has low heat utilization efficiency.

[0075] During the refrigeration process, the condenser in a refrigerator releases heat as it condenses the refrigerant. In related technologies, a convoluted pipe (forming a condensing heat exchanger) is installed below the evaporator in the freezer compartment, and the outlet of this pipe can be connected to the inlet of the evaporator in the refrigerator compartment. This allows the condensing heat from the pipe to defrost the evaporator while simultaneously cooling the refrigerator compartment.

[0076] However, when the ambient temperature of the refrigerator is low, the refrigerant in the condenser generates less heat during condensation, and the refrigerator compartment requires less cooling capacity. In this situation, as the defrosting process continues, insufficient heat generation can occur, causing the refrigerator compartment temperature to drop beyond a predetermined threshold, resulting in food freezing and affecting the user's ability to consume it.

[0077] To address the aforementioned problems, this disclosure provides, in some embodiments, a refrigerator, a refrigerator control method, and a storage medium.

[0078] The control method provided in some embodiments of this disclosure opens different defrosting paths according to different ambient temperatures of the refrigerator's environment, thereby achieving defrosting. This ensures defrosting efficiency and reduces the impact of defrosting on the refrigerator compartment temperature. For example, when the ambient temperature is low, the refrigerant flowing from the defrosting heating tube is controlled to flow to the condenser after passing through a throttling device, and the refrigerant flowing from the condenser does not pass through the evaporator of the refrigerator compartment. Alternatively, the refrigerant flowing from the condenser is in a gaseous state when passing through the evaporator of the refrigerator compartment, and the gaseous refrigerant no longer absorbs heat and undergoes a state change, thus not performing refrigeration, thereby reducing the impact of defrosting on the refrigerator compartment temperature.

[0079] The embodiments of this disclosure will now be described in detail with reference to the accompanying drawings. These embodiments may be combined with each other or exist independently; similar or identical concepts or processes may not be repeated in some embodiments.

[0080] First, the structure of a refrigerator provided by some embodiments of this disclosure will be described.

[0081] In some embodiments, FIG1 is a schematic diagram of a refrigerator according to some embodiments. As shown in FIG1, the refrigerator 10 includes a cabinet 101.

[0082] The refrigerator 10 also includes a door 102, which is connected to the cabinet 101.

[0083] The refrigerator 10 also includes a storage compartment, which is located inside the cabinet 101.

[0084] In some embodiments, the storage room includes a refrigerator compartment and a freezer compartment, etc.

[0085] In some embodiments, the refrigerator 10 further includes a refrigeration system 103 disposed within the cabinet 101. For example, FIG2 is a schematic diagram of a refrigeration system according to some embodiments. As shown in FIG2, the refrigeration system 103 includes a compressor 31 configured to provide power for refrigeration of the refrigerator 10. The compressor 31 has an exhaust port y1 and an intake port y2.

[0086] The refrigeration system 103 also includes a condenser 32, which is configured to dissipate heat from the refrigerant from the compressor 31.

[0087] The refrigeration system 103 also includes a first evaporator 33 (such as a finned evaporator), which is configured to provide cooling capacity to the freezer compartment.

[0088] The refrigeration system 103 also includes a second evaporator 34, which is configured to provide cooling capacity to the refrigerator compartment.

[0089] The refrigeration system 103 also includes a first electric valve 35, which has one inlet and two outlets, namely a first inlet a1, a first outlet a2, and a second outlet a3.

[0090] The refrigeration system 103 also includes a second electric valve 37, which has one inlet and two outlets, namely a second inlet b1, a third outlet b2, and a fourth outlet b3.

[0091] In some embodiments, the refrigeration system 103 further includes a third electric valve 38, which has an inlet and two outlets, namely a third inlet c1, a fifth outlet c2, and a sixth outlet c3.

[0092] The refrigeration system 103 also includes a defrost heating tube 36, which is bent at the bottom of the first evaporator 33. Here, the bottom of the first evaporator 33 is the part closest to the ground.

[0093] The refrigeration system 103 also includes a first throttling device 39, which is disposed between the third electric valve 38 and the second evaporator 34.

[0094] The refrigeration system 103 also includes a second throttling device 42, which is disposed between the third electric valve 38 and the condenser 32.

[0095] It should be noted that embodiments of this disclosure may include different combinations of the components described above.

[0096] In some embodiments, when the refrigeration system 103 includes all the components described above, the exhaust port y1 of the compressor 31 is connected to the first inlet a1 of the first electric valve 35, the condenser 32 is connected to the first outlet a2 of the first electric valve 35, and the second outlet a3 of the first electric valve 35 is connected to the third inlet c1 of the third electric valve 38 via the defrosting heating tube 36. The fifth outlet c2 of the third electric valve 38 is connected to the second evaporator 34 via the first throttling device 39, and the sixth outlet c3 of the third electric valve 38 is connected to the inlet of the condenser 32 via the second throttling device 42. The condenser 32 is connected to the second inlet b1 of the second electric valve 37, the third outlet b2 of the second electric valve 37 is connected to the first evaporator 33, and the fourth outlet b3 of the second electric valve 37 is connected to the second evaporator 34. The outlets of the first evaporator 33 and the second evaporator 34 are connected to the air inlet y2 of the compressor 31.

[0097] In some embodiments, the refrigerator 10 further includes a controller electrically connected to the refrigeration system 103. For example, the controller is electrically connected to the compressor 31, the first electric valve 35, the second electric valve 37 and the third electric valve 38 in the refrigeration system 103, respectively.

[0098] In some embodiments, the controller may be a microcontroller unit (MCU).

[0099] In some embodiments, the refrigeration system 103 further includes a third throttling device 41, which is disposed between the third outlet b2 of the second electric valve 37 and the first evaporator 33.

[0100] The refrigeration system 103 also includes a fourth throttling device 40, which is disposed between the fourth outlet b3 of the second electric valve 37 and the second evaporator 34. In this way, throttling and pressure reduction can be achieved through the third throttling device 41 and the fourth throttling device 40.

[0101] In some embodiments, the flow rate of the third throttling device 41 can be greater than the flow rate of the fourth throttling device 40. Providing a throttling device with a larger flow rate (e.g., the third throttling device 41) between the first evaporator 33 and the condenser 32 ensures that the refrigeration system 103 has sufficient refrigerant flow to cool the freezer compartment. Providing a throttling device with a smaller flow rate (e.g., the fourth throttling device 40) between the second evaporator 34 and the condenser 32 prevents excessive refrigerant from flowing into the second evaporator 34, which could lead to overcooling or wasted energy.

[0102] In some embodiments, the third throttling device 41 and the fourth throttling device 40 may be capillaries of different lengths. For example, the length of the third throttling device 41 is shorter than the length of the fourth throttling device 40, so that the flow rate of the third throttling device 41 can be greater than the flow rate of the fourth throttling device 40.

[0103] In some embodiments, when the refrigeration system 103 is in refrigeration mode, the fifth outlet c2 and the sixth outlet c3 of the third electric valve 38 are closed, at least one of the third outlet b2 or the fourth outlet b3 of the second electric valve 37 is open, and the first outlet a2 of the first electric valve 35 is open.

[0104] Understandably, at this time, the second inlet b1 of the second electric valve 37 is open, the first inlet a1 of the first electric valve 35 is open, and the second outlet a3 of the first electric valve 35 is closed.

[0105] In some embodiments, when the third outlet b2 of the second electric valve 37 is open and the fourth outlet b3 is closed, the refrigeration system 103 cools the freezer compartment. When the fourth outlet b3 of the second electric valve 37 is open and the third outlet b2 is closed, the refrigeration system 103 cools the refrigerator compartment. When both the third outlet b2 and the fourth outlet b3 of the second electric valve 37 are open, the refrigeration system 103 cools both the refrigerator compartment and the freezer compartment simultaneously.

[0106] In some embodiments, when the refrigeration system 103 is in refrigeration mode, if there is a refrigeration demand in the refrigerator compartment, the fourth outlet b3 of the second electric valve 37 opens and the third outlet b2 closes.

[0107] Figure 3 is a schematic diagram of the refrigerant flow direction when the refrigeration system according to some embodiments is used to refrigerate the refrigerator compartment in refrigeration mode. As shown in Figure 3, the low-temperature and low-pressure gaseous refrigerant is drawn into the air inlet y2 of the compressor 31 and compressed into a high-temperature and high-pressure gaseous refrigerant in the cylinder of the compressor 31. Then, it enters the condenser 32 through the exhaust port y1. The high-temperature and high-pressure gaseous refrigerant dissipates heat through the condenser 32, and its temperature continuously decreases. It is cooled into a saturated gaseous refrigerant with normal temperature and high pressure and further cooled into a saturated liquid refrigerant. The liquid refrigerant flowing out of the condenser 32 enters the fourth throttling device 40 through the second electric valve 37 to throttle and reduce its pressure, becoming a two-phase refrigerant with normal temperature and low pressure (i.e., a two-phase mixture composed of gaseous and liquid refrigerant). Then, it enters the second evaporator 34 to absorb heat and vaporize. This not only reduces the temperature of the second evaporator 34 and its surroundings, but also turns the refrigerant into a low-temperature and low-pressure gas. Then, the refrigerant flowing out of the second evaporator 34 enters the compressor 31 along the pipeline to complete the refrigeration cycle.

[0108] In some embodiments, if the freezer compartment has a cooling demand, the third outlet b2 of the second electric valve 37 opens and the fourth outlet b3 closes.

[0109] Figure 4 is a schematic diagram of the refrigerant flow direction when the refrigeration system according to some embodiments is refrigerating the freezer compartment in refrigeration mode. As shown in Figure 4, the low-temperature and low-pressure gaseous refrigerant is drawn into the air inlet y2 of the compressor 31 and compressed into a high-temperature and high-pressure gaseous refrigerant in the cylinder of the compressor 31. Then, it enters the condenser 32 through the exhaust port y1. The high-temperature and high-pressure gaseous refrigerant dissipates heat through the condenser 32, and its temperature continuously decreases. It is cooled into a saturated gaseous refrigerant with normal temperature and high pressure and further cooled into a saturated liquid refrigerant. The refrigerant flowing out of the condenser 32 enters the third throttling device 41 through the second electric valve 37 to throttle and reduce its pressure, becoming a gas-liquid two-phase refrigerant with normal temperature and low pressure. Then, it enters the first evaporator 33 to absorb heat and vaporize. This not only reduces the temperature of the first evaporator 33 and its surroundings, but also turns the refrigerant into a low-temperature and low-pressure gas. Then, the refrigerant flowing out of the first evaporator 33 enters the compressor 31 again along the pipeline to complete the refrigeration cycle.

[0110] In some embodiments, if the refrigeration system 103 refrigerates both the freezer and refrigerator compartments simultaneously, then the third outlet b2 and the fourth outlet b3 of the second electric valve 37 are both opened.

[0111] Figure 5 is a schematic diagram of the refrigerant flow when the refrigeration system according to some embodiments simultaneously refrigerates the refrigerator compartment and the freezer compartment in refrigeration mode. As shown in Figure 5, the low-temperature and low-pressure gaseous refrigerant is drawn into the air inlet y2 of the compressor 31 and compressed into a high-temperature and high-pressure gaseous refrigerant in the cylinder of the compressor 31. Then, it enters the condenser 32 through the exhaust port y1. The high-temperature and high-pressure gaseous refrigerant dissipates heat through the condenser 32, and its temperature continuously decreases. It is cooled into a saturated gaseous refrigerant with normal temperature and high pressure and further cooled into a saturated liquid refrigerant. The refrigerant flowing out of the condenser 32 enters the third throttling device 41 through the second electric valve 37 to throttle and reduce its pressure, becoming a gas-liquid two-phase refrigerant with normal temperature and low pressure. Then, it enters the first evaporator 33 to absorb heat and vaporize. This not only reduces the temperature of the first evaporator 33 and its surroundings, but also turns the refrigerant into a low-temperature and low-pressure gas. The refrigerant flowing out of the first evaporator 33 then enters the compressor 31 again along the pipeline. Meanwhile, the refrigerant flowing out of the condenser 32 enters the fourth throttling device 40 through the second electric valve 37 to be throttled and depressurized into a two-phase gas-liquid refrigerant at room temperature and low pressure. Then it enters the second evaporator 34 to absorb heat and vaporize, which not only lowers the temperature of the second evaporator 34 and its surroundings, but also turns the refrigerant into a low-temperature and low-pressure gas. The refrigerant flowing out of the second evaporator 34 then enters the compressor 31 along the pipeline to complete the refrigeration cycle.

[0112] In some embodiments, when the refrigeration system 103 is in refrigeration mode, the controller can control the fifth outlet c2 and the sixth outlet c3 of the third electric valve 38 to close, the first outlet a2 of the first electric valve 35 to open, and the third outlet b2 of the second electric valve 37 to open (at which time the fourth outlet b3 is closed) to cool the freezer compartment. After cooling the freezer compartment is complete, the controller can control the fourth outlet b3 of the second electric valve 37 to open and the third outlet b2 to close to cool the refrigerator compartment. After cooling the refrigerator compartment is complete, the controller can control the compressor 31 to stop, causing the refrigeration system 103 to exit the refrigeration mode.

[0113] Because frozen foods are sensitive to temperature changes, the freezer compartment can be cooled first, followed by the refrigerator compartment. This avoids partial thawing of food in the freezer compartment due to a rise in temperature, which could affect its quality and safety. In some embodiments, when the temperature of the freezer compartment reaches (is less than or equal to) the target freezing temperature, it can be determined that the freezer compartment cooling is complete. The controller can then open the fourth outlet b3 of the second electric valve 37, opening the passage between the condenser 32 and the second evaporator 34, thereby allowing the second evaporator 34 to cool the refrigerator compartment. Understandably, the third outlet b2 of the second electric valve 37 is closed at this time.

[0114] In some embodiments, when the temperature of the refrigerator compartment is detected to have reached the target refrigeration temperature, it can be determined that the refrigeration of the refrigerator compartment is complete. At this time, the controller can control the compressor 31 to stop, so that the refrigeration system exits the refrigeration mode.

[0115] It is understandable that the target freezing temperature and target refrigeration temperature can be set by the user according to actual needs, or the refrigerator can be set automatically by the user based on actual usage.

[0116] In some embodiments, after defrosting, the freezer compartment can be cooled first, followed by the refrigerator compartment. This can quickly lower the temperature and reduce the risk of partial thawing of food.

[0117] In some embodiments, the refrigeration system 103 further includes a defrosting heating element 36, which can be used to melt the frost layer on the first evaporator 33.

[0118] In some embodiments, as shown in FIG6A, when the refrigeration system 103 includes a compressor 31, a first electric valve 35, a second electric valve 37, a defrost heating tube 36, a first evaporator 33, a condenser 32, a first throttling device 39, and a second evaporator 34, the exhaust port of the compressor 31 is connected to the first inlet a1 of the first electric valve 35, the condenser 32 is connected to the first outlet of the first electric valve 35, the second outlet of the first electric valve 35 is connected to the first throttling device 39 through the defrost heating tube 36; the outlet of the condenser 32 is connected to the second inlet of the second electric valve 37, the third outlet of the second electric valve 37 is connected to the first evaporator 33, and the fourth outlet of the second electric valve 37 is connected to the second evaporator 34; the outlet of the first evaporator 33 and the outlet of the second evaporator 34 are respectively connected to the air inlet of the compressor.

[0119] When the refrigeration system 103 is operating in defrost mode, the first outlet a2 of the first electric valve 35 is closed, and the second outlet a3 is open. Low-temperature, low-pressure gaseous refrigerant is drawn into the compressor 31 and compressed into high-temperature, high-pressure gaseous refrigerant within the compressor 31's cylinder. This gaseous refrigerant is then discharged into the defrost heating tube 36, where it condenses and generates heat. This heat melts the frost on the surface of the first evaporator 33. The condensed refrigerant is then throttled and depressurized by the first throttling device 39, becoming a room-temperature, low-pressure gas-liquid two-phase refrigerant. This refrigerant then enters the second evaporator 34, where the liquid phase is evaporated to form a gaseous refrigerant, lowering the temperature of the second evaporator 34 and its surroundings. This allows for cooling of the refrigerator compartment.

[0120] Based on the refrigerator 10 described above, Figure 7A is a flowchart illustrating a refrigerator control method according to some embodiments. This method can be applied to the controller of the refrigerator 10 described above. As shown in Figure 7A, the method includes steps S601 to S605. S601: When a defrosting requirement is detected in the first evaporator 33, the compressor 31 is controlled to stop.

[0121] S602, Obtain the ambient temperature of the environment where the refrigerator is located.

[0122] In some embodiments, the refrigerator further includes a temperature sensor disposed on the outside of the refrigerator body and used to detect the ambient temperature of the environment in which the refrigerator is located. The controller can acquire the ambient temperature detected by the temperature sensor when it detects that the first evaporator 33 needs to defrost.

[0123] S603. Determine whether the ambient temperature is lower than the first preset value. If so, execute S704.

[0124] In some embodiments, the first preset value may be 12°C. If the ambient temperature is lower than the first preset value, it indicates that the ambient temperature of the environment where the refrigerator is located is low.

[0125] S604, control the first inlet a1 and the second outlet a3 of the first electric valve 35 to open.

[0126] If the ambient temperature is determined to be less than the first preset value, the controller can control the first inlet a1 and the second outlet a3 of the first electric valve 35 to open, so that the refrigerant of the compressor 31 flows from the exhaust port y1 to the defrost heating tube 36, and then flows through the defrost heating tube 36 to the second evaporator 34, and then enters the compressor 31 through the air inlet y2 of the compressor 31, thereby realizing the defrost cycle of the refrigerant.

[0127] S605 controls the compressor 31 to start, so that the refrigeration system enters defrosting mode.

[0128] After the first inlet a1 and the second outlet a3 of the first electric valve 35 are opened, the controller controls the compressor 31 to start, so that the refrigeration system enters the defrosting mode.

[0129] Figure 6B is a schematic diagram of the refrigerant flow in defrost mode of a refrigeration system according to some embodiments. As shown in Figure 6B, when the refrigeration system 103 includes a compressor 31, a first electric valve 35, a defrost heating tube 36, a first evaporator 33, a condenser 32, a first throttling device 39, a second evaporator 34, a third electric valve 38, and a second throttling device 42, and the refrigeration system 103 is in defrost mode, the first outlet a2 of the first electric valve 35 is closed, and the second outlet a3 is open. Low-temperature, low-pressure gaseous refrigerant is drawn into the compressor 31 and compressed into high-temperature, high-pressure gaseous refrigerant in the cylinder of the compressor 31. Then, it is discharged into the defrost heating tube 36. The high-temperature, high-pressure gaseous refrigerant enters the defrost heating tube 36 and condenses to generate heat. Based on this heat, the frost on the surface of the first evaporator 33 can be melted. Then, it enters the first throttling device 39 through the fifth outlet c2 of the third electric valve 38. After being throttled and depressurized by the first throttling device 39, it becomes a gas-liquid two-phase refrigerant at room temperature and low pressure, and enters the second evaporator 34. This causes the liquid phase refrigerant in the gas-liquid two-phase refrigerant to be evaporated to form a gas phase refrigerant, which lowers the temperature of the second evaporator 34 and its surroundings. At this time, it can cool the cold storage compartment.

[0130] It should be noted that the arrows in Figures 3 to 6B indicate the direction of refrigerant flow.

[0131] The defrosting process of a refrigerator will be explained in detail below.

[0132] Based on the refrigerator 10 described above, FIG7B is a flowchart illustrating a refrigerator control method according to some embodiments. The method can be applied to the controller of the refrigerator 10 described above. As shown in FIG7B, the method includes steps S701 to S705.

[0133] S701. When a defrosting requirement is detected in the first evaporator 33, the compressor 31 is stopped.

[0134] In some embodiments, when the temperature of the surface of the first evaporator 33 is detected to be lower than a preset threshold (e.g., lower than -15°C), it can be determined that there is a lot of frost on the surface of the first evaporator 33, and at this time it can be determined that the first evaporator 33 has a defrosting requirement.

[0135] In some embodiments, if the time interval between the current time and the time when the previous defrosting ended reaches (greater than or equal to) a preset time interval, that is, the time between the current time and the time when the previous defrosting ended is relatively long, and there is a lot of frost on the surface of the first evaporator 33, then it can be determined that the first evaporator 33 has a defrosting requirement.

[0136] Understandably, if the compressor 31 is off when a defrosting requirement is detected in the first evaporator 33, the controller can keep the compressor 31 in the same state. If the compressor 31 is on when a defrosting requirement is detected in the first evaporator 33, the controller can shut down the compressor 31 (e.g., for 5 minutes) and then switch the connection opening of at least one electric valve based on the ambient temperature. This avoids the impact on the inside of the refrigeration system 103 caused by the electric valve switching due to internal pressure imbalance.

[0137] S702, Obtain the ambient temperature of the environment where the refrigerator is located.

[0138] When the controller detects that the first evaporator 33 needs to defrost, it can obtain the ambient temperature detected by the temperature sensor.

[0139] S703. Determine whether the ambient temperature is lower than the first preset value. If so, execute S704.

[0140] In some embodiments, the first preset value may be 12°C. If the ambient temperature is lower than the first preset value, it indicates that the ambient temperature of the environment where the refrigerator is located is low.

[0141] S704, control the first inlet a1 and the second outlet a3 of the first electric valve 35 to open, control the sixth outlet c3 of the third electric valve 38 to open, and control at least one of the third outlet b2 or the fourth outlet b3 of the second electric valve 37 to open.

[0142] If the ambient temperature is determined to be less than the first preset value, the controller can control the first inlet a1 and the second outlet a3 of the first electric valve 35 to open, and control the sixth outlet of the third electric valve 38 and the third outlet of the second electric valve 37 to open, so that the refrigerant of the compressor 31 flows from the exhaust port y1 to the defrosting heating tube 36, and after passing through the defrosting heating tube 36 and the second throttling device 42, it flows to the condenser, and then flows through the condenser to at least one of the first evaporator 33 or the second evaporator 34, and then enters the compressor 31 through the air inlet y2 of the compressor 31, thereby realizing the defrosting cycle of the refrigerant.

[0143] In other words, the refrigerant flowing out of the condenser can flow to the first evaporator 33, or to the second evaporator 34, or to both the first evaporator 33 and the second evaporator 34.

[0144] Figure 8 is a schematic diagram of the refrigerant flow in defrost mode of a refrigeration system according to some embodiments. As shown in Figure 8, in some embodiments, taking the refrigerant flowing from the condenser to the first evaporator 33 as an example, the low-temperature and low-pressure gaseous refrigerant is drawn in by the air inlet y2 of the compressor 31 and compressed into a high-temperature and high-pressure gaseous refrigerant in the cylinder of the compressor 31. Then, it is discharged through the exhaust port y1 to the defrost heating tube 36. The high-temperature and high-pressure gaseous refrigerant enters the defrost heating tube 36 to condense and generate heat. Based on this heat, the frost on the surface of the first evaporator 33 can be melted. Then, it enters the second throttling device 42 through the sixth outlet c3 of the third electric valve 38. After being throttled and depressurized by the second throttling device 42, it becomes a low-pressure, room-temperature gas-liquid two-phase refrigerant and enters the condenser 32. This causes the liquid phase refrigerant in the gas-liquid two-phase refrigerant to evaporate and form a gas phase refrigerant. As a result, when the gas phase refrigerant flowing out of the condenser 32 enters the first evaporator 33, the first evaporator 33 does not perform refrigeration, thus not affecting the defrosting of the first evaporator 33.

[0145] In other embodiments, taking the refrigerant flowing from the condenser 32 to the second evaporator 34 as an example, when the gaseous refrigerant flowing from the condenser 32 enters the second evaporator 34, since the second evaporator 34 does not perform refrigeration, the temperature of the refrigerator compartment is less affected during the defrosting process of the first evaporator 33.

[0146] S705 controls the compressor 31 to start, so that the refrigeration system enters defrosting mode.

[0147] After the controller opens the corresponding defrosting passages by controlling the first electric valve 35, the second electric valve 37 and the third electric valve 38, the controller can control the compressor 31 to start defrosting.

[0148] In some embodiments of this disclosure, when the ambient temperature is low, for example, when the ambient temperature is less than a first preset value, the controller controls the refrigerant flowing out of the defrosting heating tube 36 to flow to the condenser 32 after passing through the throttling device. The refrigerant flowing out of the condenser 32 does not pass through the evaporator of the refrigerator compartment, or when it passes through the evaporator of the refrigerator compartment, it no longer performs refrigeration because the refrigerant is in the gas phase, thereby reducing the impact of defrosting on the temperature of the refrigerator compartment.

[0149] In some embodiments, when the controller controls the first electric valve 35, the second electric valve 37, and the third electric valve 38, it can first control the sixth outlet c3 of the third electric valve 38 to open, and while the sixth outlet c3 is open for a fourth duration, control the first inlet a1 and the second outlet a3 of the first electric valve 35 to open, so that after the refrigerant in the defrosting heating tube 36 flows to the condenser 32 (i.e., increases the refrigerant content participating in the defrosting cycle), the refrigerant discharged by the compressor 31 is controlled to enter the defrosting heating tube 36, thereby improving the defrosting efficiency.

[0150] In some embodiments, the fourth duration may be 3 minutes or other durations.

[0151] In some embodiments, when the controller controls the first inlet a1 and the second outlet a3 of the first electric valve 35 to open, it can control the compressor 31 to start. If the operating time of the compressor 31 is equal to the fifth time period, it can then control at least one of the third outlet b2 and the fourth outlet b3 of the second electric valve 37 to open, so that the refrigerant in the first evaporator 33 and the second evaporator 34 is extracted within the fifth time period, thereby increasing the refrigerant content in the defrosting cycle and improving the defrosting efficiency.

[0152] In some embodiments, the fifth duration can be 3 minutes or other durations.

[0153] In other words, the third electric valve 38 can be controlled to connect the sixth outlet c3 for a period of time, and before the second electric valve 37 is controlled to open the third outlet b1 or the fourth outlet b2, the compressor 31 can be controlled to run for a period of time so that the refrigerant in the defrosting heating tube 36 enters the condenser and the refrigerant in the first evaporator 33 and the second evaporator 34 is extracted, thereby increasing the refrigerant content in the defrosting cycle and improving the defrosting efficiency.

[0154] It should be noted that before the refrigeration system 103 enters the defrosting mode, that is, before the refrigeration system starts defrosting, the outlets of the first electric valve 35, the second electric valve 37, and the third electric valve 38 can be in the closed state.

[0155] In some embodiments, before the controller opens at least one of the first outlet b2 or the second outlet b3 of the second electric valve 37, the controller may control the compressor 31 to operate at a third speed. After the controller opens at least one of the first outlet or the second outlet of the second electric valve 37, the controller may control the compressor 31 to operate at a fourth speed, where the fourth speed is greater than the third speed, after a sixth period of time.

[0156] For example, the sixth duration could be 5 minutes, the fourth speed could be 3900 rpm / min, and the third speed could be 1500 rpm / min. This allows the compressor 31 to operate at a lower speed for a period of time when the ambient temperature is low, since the compressor 31 does not require much work, before increasing the speed, thus achieving energy savings.

[0157] In some embodiments, when the ambient temperature is high, the controller may defrost the first evaporator 33 in the following manner.

[0158] Figure 9 is a flowchart illustrating another refrigerator control method according to some embodiments. The method is applied to the controller of the refrigerator 10 described above. As shown in Figure 9, the method includes steps S901 to S905.

[0159] S901. When a defrosting requirement is detected in the first evaporator 33, the compressor 31 is controlled to stop.

[0160] S902, Obtain the ambient temperature of the environment where the refrigerator is located.

[0161] S903. Determine whether the ambient temperature is lower than the first preset value. If not, execute S904.

[0162] For a description of S901 to S903, please refer to the above embodiments, and it will not be repeated here.

[0163] S904, controls the opening of the first inlet a1 and the second outlet a3 of the first electric valve 35, and the fifth outlet c2 of the third electric valve 38.

[0164] If the ambient temperature is greater than or equal to the first preset value, the controller can open the first inlet a1 and second outlet a2 of the first electric valve 35 and the fifth outlet c2 of the third electric valve 38, since the required cooling capacity of the refrigerator compartment is relatively large. It should be noted that at this time, the third outlet b2 and fourth outlet b3 of the second electric valve 37 are closed, and the sixth outlet b3 of the third electric valve 38 is also closed. This allows the refrigerant in the compressor 31 to flow from the exhaust port to the defrosting heating tube 36, and after passing through the defrosting heating tube 36 and the first throttling device 39, it flows to the second evaporator 34. After passing through the second evaporator 34, it enters the compressor 31 through the inlet y2, thus realizing the defrosting cycle of the refrigerant.

[0165] In other words, the refrigerant flowing out of the defrosting heating pipe 36 flows to the second evaporator 34 after passing through the first throttling device 39, so as to cool the refrigerator compartment.

[0166] S905, control the compressor 31 to start, so that the refrigeration system 103 enters the defrosting mode.

[0167] In this embodiment, when the ambient temperature is not low, for example, when the ambient temperature is greater than or equal to the first preset value, since the refrigeration capacity required by the refrigerator is large, the first evaporator 33 can be defrosted without going through the defrosting path of the condenser 32, thereby meeting the refrigeration demand of the refrigerator during defrosting. That is, the defrosting of the refrigeration system 103 has little impact on the temperature of the refrigerator.

[0168] In some embodiments, when the controller controls the first electric valve 35, the second electric valve 37, and the third electric valve 38, it can control the third outlet b2 and the fourth outlet b3 of the second electric valve 37 to open. While the third outlet b2 and the fourth outlet b3 of the second electric valve 37 are open for a first duration, the controller controls the second outlet a3 of the first electric valve 35 to open, so that the refrigerant in the condenser 32 flows to the first evaporator 33 and the second evaporator 34 during this period (i.e., the first duration). After the second outlet a3 of the first electric valve 35 is opened, the compressor 31 is started. When the compressor 31 runs for a period of time equal to (for example) the second duration, the fifth outlet c2 of the third electric valve 38 is opened, and the third outlet b2 and the fourth outlet b3 of the second electric valve 37 are closed. This causes the compressor 31 to draw out the refrigerant from the first evaporator 33 and the second evaporator 34, close the passage between the condenser 32 and the first evaporator 33 and the second evaporator 34, and open the passage between the second evaporator 34 and the defrost heating tube 36, thereby increasing the refrigerant content in the defrost cycle and improving defrost efficiency.

[0169] In some embodiments, the first duration may be 10 minutes, allowing sufficient time for the refrigerant in the condenser 32 to flow to the first evaporator 33 and the second evaporator 34. The second duration may be 3 minutes, or other durations.

[0170] In some embodiments, before opening the fifth outlet c2 of the third electric valve 38, the controller can control the compressor 31 to operate at a first speed. After opening the fifth outlet of the third electric valve 38 and closing the third and fourth outlets of the second electric valve 37, the controller can determine whether the ambient temperature is greater than or equal to a second preset value. If the ambient temperature is greater than or equal to the second preset value, the controller can control the compressor 31 to operate at a second speed while continuing to operate at the first speed for a third time.

[0171] Here, the second rotational speed is greater than the first rotational speed, and the second preset value is greater than the first preset value.

[0172] In some embodiments, the second preset value may be 32°C.

[0173] In some embodiments, the first rotational speed may be 2100 rpm / min, and the second rotational speed may be 3900 rpm / min.

[0174] In some embodiments, the third duration may be 5 minutes or other durations.

[0175] If the ambient temperature is determined to be greater than or equal to the second preset value, it indicates that the ambient temperature is too high, and the workload of compressor 31 will increase. If it is initially operated at a high speed, compressor 31 may overheat, leading to problems such as lubricant deterioration or component damage. Running at a lower speed for a period of time allows compressor 31 to gradually adapt to the high-temperature environment, reducing the risk of compressor 31 overheating, protecting compressor 31, and extending its service life.

[0176] The following section explains how the controller manages the various electric valves to improve refrigeration efficiency when the refrigeration system 103 exits defrost mode.

[0177] Figure 10 is a flowchart illustrating another refrigerator control method according to some embodiments. The method can be applied to the controller of the refrigerator 10 described above. As shown in Figure 10, the method includes steps S1001 to S1003.

[0178] S1001. When the first evaporator 33 completes defrosting, control the compressor 31 to shut down, control the first inlet a1 of the first electric valve 35 to close, and control the first outlet a2 and the second outlet a3 to open.

[0179] In some embodiments, when the refrigeration system 103 is in defrost mode, the controller can acquire the temperature value detected by the temperature sensor located on the surface of the first evaporator 33, and determine whether the first evaporator 33 has completed defrosting based on the temperature value. For example, when the temperature value is greater than or equal to 5°C, it can be determined that the frost on the first evaporator 33 has melted completely, and the controller can then control the refrigeration system 103 to exit the defrost mode.

[0180] Here, the controller can control the refrigeration system 103 to exit the defrost mode by controlling the compressor 31 to stop and disconnecting the passage between the compressor 31 and the defrost heating tube 36.

[0181] In some embodiments, when the first evaporator 33 completes defrosting, the controller can control the compressor 31 to shut down, control the first inlet a1 of the first electric valve 35 to close, and control the first outlet a2 and the second outlet a3 of the first electric valve 35 to open, thereby disconnecting the passage between the compressor 31 and the defrosting heating tube 36 and closing the passage between the defrosting heating tube 36 and the condenser 32, so that the refrigerant in the defrosting heating tube 36 flows to the condenser 32 through the first electric valve 35, thereby increasing the refrigerant content of the subsequent refrigeration system 103 participating in the refrigeration cycle and improving refrigeration efficiency.

[0182] S1002, when the first inlet a1 of the first electric valve 35 is closed and the first outlet a2 and the second outlet a3 are opened for a seventh time, the first inlet a1 and the first outlet a2 of the first electric valve 35 are opened and the second outlet a3 is closed.

[0183] After a seventh period of time, when the first inlet a1 of the first electric valve 35 is closed and its first outlet a2 and second outlet a3 are open, the controller can control the first inlet a1 and first outlet a2 of the first electric valve 35 to open, and the second outlet a3 to close, so that the refrigerant discharged from the discharge port of the compressor 31 enters the condenser through the first electric valve 35. It can be understood that at this time, the second outlet a3 of the first electric valve 35 is closed, that is, the passage between the compressor 31 and the defrosting heating tube 36 is disconnected.

[0184] In some embodiments, the seventh duration can be 5 minutes.

[0185] S1003, control the compressor 31 to start, and control the third outlet b2 and the fourth outlet b3 of the second electric valve 37 to open.

[0186] After controlling the flow of refrigerant in the defrosting heating tube 36 to the condenser 32, the compressor 31 can be turned on, so that the refrigeration system 103 enters the refrigeration mode.

[0187] In some embodiments, the controller can control the second electric valve 37 to open the third outlet b2 and the fourth outlet b3, so that the refrigeration system 103 can simultaneously refrigerate the freezer and the refrigerator compartment. This can ensure that the temperature of the refrigerator compartment is below the temperature threshold while the temperature of the freezer compartment is increased, so as to avoid affecting the food stored in the refrigerator compartment.

[0188] In some embodiments of this disclosure, when defrosting is completed, the controller can connect the defrosting heating tube 36 to the condenser 32, so that the refrigerant in the defrosting heating tube 36 flows to the condenser 32, thereby increasing the refrigerant content of the subsequent refrigeration system 103 participating in the refrigeration cycle and improving the refrigeration efficiency.

[0189] In some embodiments, after the refrigerator 10 is manufactured, the refrigeration system 103 of the refrigerator 10 needs to be evacuated. This involves removing moisture, air, and other impurities from the pipes of the refrigeration system 103, creating a vacuum within the system. This prevents moisture and air from reacting with the refrigerant and the oil in the compressor 31, which could affect the refrigeration efficiency or damage the system. During the evacuation process, the inlets and all outlets of the first electric valve 35, the second electric valve 37, and the third electric valve 38 can be opened to ensure the entire internal piping of the refrigeration system 103 is connected. This prevents any closed spaces from preventing air from being extracted.

[0190] In some embodiments, after air is evacuated from the refrigeration system 103 of the refrigerator 10, the refrigerator 10 can be controlled to start its initial cooling operation. In some embodiments, it can be detected whether the vacuum level in the refrigeration system 1003 of the refrigerator 10 is less than or equal to 5 Pa (Pa). If so, refrigerant charging can be performed. For example, refrigerant can be injected into the refrigeration system 103 using a refrigerant charging device. After the refrigerant is injected into the refrigeration system 103 of the refrigerator 10, it can be controlled as follows:

[0191] Five minutes after the refrigerant is injected into the refrigeration system, the first inlet a1 and the first outlet a2 of the first electric valve 35 can be opened to open the passage between the compressor 31 and the condenser 32. Then, the fifth outlet c2 and the sixth outlet c3 of the third electric valve 38 are closed, and the third outlet b2 and the fourth outlet b3 of the second electric valve 37 are opened. Then, the compressor 31 is started to achieve simultaneous cooling of the refrigerator compartment and the freezer compartment.

[0192] In some embodiments, since the refrigerator 10 is initially powered on and its internal temperature is high, the compressor 31 can be controlled to operate at the target speed to rapidly reduce the internal temperature of the refrigerator 10 to the target temperature for rapid cooling. For example, the target speed is 3900 rpm / min.

[0193] When the refrigerator compartment finishes cooling, for example, when the refrigerator compartment temperature reaches (e.g., equal to) 4°C, the second electric valve 37 can be controlled to close the fourth outlet b3. At this time, the third outlet b1 of the second electric valve 37 is still open, meaning that only the freezer compartment is cooled. When the freezer compartment finishes cooling, for example, when the freezer compartment temperature reaches (less than or equal to) -18°C, the second electric valve 37 can be controlled to close the third outlet b2, and the compressor 31 can be stopped. This achieves the detection of the initial cooling of the refrigerator 10 and determines whether there is a fault.

[0194] It should be noted that the amount of refrigerant involved in the refrigeration cycle is one of the factors affecting the refrigeration efficiency of a refrigerator. For example, when the ambient temperature of the refrigerator is high, even if the compressor 31 reaches (greater than or equal to) its maximum speed, it cannot meet the current refrigeration demand, resulting in poor refrigeration performance, which is not conducive to extending the life of the compressor 31, and also leads to higher energy consumption.

[0195] The following explains how to adjust the refrigerant content in the refrigeration system 103 of the refrigerator 10 to improve the refrigeration efficiency of the refrigerator 10 and save energy.

[0196] Figure 11 is a flowchart illustrating another refrigerator control method according to some embodiments. This method can be applied to the controller of the refrigerator 10 described above. As shown in Figure 11, the method includes steps S1101 to S1103.

[0197] S1101. When a cooling demand is detected in the refrigerator 10, the ambient temperature of the environment where the refrigerator 10 is located is obtained.

[0198] When a cooling demand is detected in the refrigerator 10, for example, when a cooling demand is detected in the refrigerator compartment or the freezer compartment, the controller can obtain the ambient temperature of the environment where the refrigerator 10 is located.

[0199] In some embodiments, the controller can acquire the ambient temperature detected by the temperature sensor when it detects that the refrigerator 10 has a cooling demand.

[0200] S1102. Based on the ambient temperature, the amount of refrigerant participating in the refrigeration cycle in the refrigeration system 103 is adjusted to the target content through the first electric valve 35, the second electric valve 37 and the third electric valve 38.

[0201] After obtaining the ambient temperature, the controller can adjust the amount of refrigerant participating in the refrigeration cycle in the refrigeration system 103 to the target content through the first electric valve 35, the second electric valve 37 and the third electric valve 38.

[0202] In some embodiments, when the ambient temperature is high, i.e., when the ambient temperature is greater than or equal to a third preset value, the target content can be a first content. When the ambient temperature is not high, i.e., when the ambient temperature is less than the third preset value, the target content can be a second content. Here, the second content is greater than the first content. It can be understood that the first content and the second content are respectively less than the total refrigerant content in the refrigeration system.

[0203] In some embodiments, the controller can control the first electric valve 35, the second electric valve 37 and the third electric valve 38 to allow the refrigerant to be discharged from the defrost heating tube 36 or stored in the defrost heating tube 36, so as to regulate the refrigerant content participating in the refrigeration cycle.

[0204] S1103, the fifth outlet c2 and the sixth outlet c3 of the third electric valve 38 are closed, the first outlet a2 of the first electric valve 35 is opened, and at least one of the third outlet b2 or the fourth outlet b3 of the second electric valve 37 is opened, so that the refrigeration system 103 enters the refrigeration mode.

[0205] After adjusting the refrigerant content participating in the refrigeration cycle in the refrigeration system 103, the controller can open the first outlet a2 of the first electric valve 35, allowing the refrigerant discharged from the compressor 31 to enter the condenser 32. It also controls the fifth outlet c2 and the sixth outlet c3 of the third electric valve 38 to close, disconnecting the outlet of the defrosting heating tube 36. Finally, it controls at least one of the first outlet b2 or the second outlet b3 of the second electric valve 37 to open, allowing at least one of the first evaporator 33 or the second evaporator 34 to connect to the condenser 32, thus putting the refrigeration system 103 into refrigeration mode.

[0206] In other words, the controller can open the third outlet b2 of the second electric valve 37 to cool the freezer compartment. Alternatively, the controller can open the fourth outlet b3 of the second electric valve 37 to cool the refrigerator compartment. Or, the controller can open both the third outlet b2 and the fourth outlet b3 of the second electric valve to cool both the refrigerator and freezer compartments simultaneously.

[0207] In some embodiments, the controller can open the third outlet b2 of the second electric valve 37, causing the refrigeration system 103 to cool the freezer compartment. When the freezer compartment cooling is complete, the controller opens the fourth outlet b3 of the second electric valve 37, causing the refrigeration system 103 to cool the refrigerator compartment. In some embodiments, when the temperature of the freezer compartment is detected to be less than or equal to the target freezing temperature, it can be determined that the freezer compartment cooling is complete. The controller can then open the fourth outlet b3 of the second electric valve 37, opening the passage between the condenser 32 and the second evaporator 34, thereby causing the second evaporator 34 to cool the refrigerator compartment. It is understood that at this time, the third outlet b2 of the second electric valve 37 is closed.

[0208] Because frozen foods are sensitive to temperature changes, the freezer compartment can be cooled first, followed by the refrigerator compartment. This can prevent the temperature in the freezer compartment from rising, which could cause the food to partially thaw and affect its quality.

[0209] In some embodiments, when the temperature of the refrigerator compartment is detected to have reached (e.g., equal to) the target refrigerator temperature, it can be determined that the refrigerator compartment has completed refrigeration, and the controller can control the compressor 31 to stop, so that the refrigeration system 103 exits the refrigeration mode.

[0210] It is understandable that the target freezing temperature and target refrigeration temperature can be set by the user according to actual needs, or by the refrigerator according to the user's actual usage.

[0211] In some embodiments of this disclosure, the refrigerant content participating in the refrigeration cycle in the refrigeration system 103 is adjusted according to the ambient temperature via the first electric valve 35, the second electric valve 37, and the third electric valve 38, so that the refrigerant content participating in the refrigeration cycle can meet the refrigeration requirements at the corresponding ambient temperature and improve refrigeration efficiency.

[0212] The following explains how the controller adjusts the amount of refrigerant participating in the refrigeration cycle in the refrigeration system 103 to the target content based on the ambient temperature through the first electric valve 35, the second electric valve 37, and the third electric valve 38.

[0213] Figure 12 is a flowchart illustrating another refrigerator control method according to some embodiments. This method can be applied to the controller of the refrigerator 10 described above. As shown in Figure 12, the method includes steps S1201 to S1204.

[0214] S1201. When a cooling demand is detected in the refrigerator 10, the ambient temperature of the environment where the refrigerator 10 is located is obtained.

[0215] S1202. Determine whether the ambient temperature is greater than or equal to the third preset value. If yes, proceed to S1203; otherwise, proceed to S1204.

[0216] In some embodiments, the third preset value may be 32°C (degrees Celsius).

[0217] S1203, control the third outlet b2 and the fourth outlet b3 of the second electric valve 37 to close, and control the second outlet a3 of the first electric valve 35 to open, so that the target content is the first content.

[0218] When the ambient temperature is greater than or equal to the third preset value, the controller can control the third and fourth outlets of the second electric valve 37 to close, thereby disconnecting the passage between the condenser 32 and the first evaporator 33 and the second evaporator 34 respectively, and control the second outlet a3 of the first electric valve 35 to open, so that the refrigerant flowing out of the compressor 31 can flow to the defrosting heating tube 36.

[0219] Understandably, at this time, the fifth and sixth outlets of the third electric valve 38 are closed, and the first outlet of the first electric valve 35 is closed. The inlets of the first electric valve 35, the second electric valve 37, and the third electric valve 38 are open.

[0220] After controlling the first electric valve 35, the second electric valve 37, and the third electric valve 38, the compressor 31 can be started. After the compressor 31 starts, it can draw refrigerant from the first evaporator 33 and the second evaporator 34 and store it in the defrost heating tube 36, ensuring that the target content of refrigerant participating in the refrigeration cycle is the first content. That is, by storing a portion of the refrigerant in the refrigeration system in the defrost heating tube 36, the content of refrigerant participating in the refrigeration cycle is reduced compared to when no refrigerant is stored in the defrost heating tube 36.

[0221] Figure 13 is a schematic diagram of the refrigerant flow direction when storing refrigerant in the defrost heating tube according to some embodiments. As shown in Figure 13, after the compressor 31 is turned on, the refrigerant of the first evaporator 33 and the second evaporator 34 flows to the compressor 31 through the air inlet y2 of the compressor 31, and then flows to the defrost heating tube 36 through the exhaust port y1 of the compressor 31, so that the refrigerant can be stored in the defrost heating tube 36.

[0222] S1204, control the first inlet a1, first outlet a2 and second outlet a3 of the first electric valve 35 to open, control the second inlet b1, third outlet b2 and fourth outlet b3 of the second electric valve 37 to open, and control the third inlet c1, fifth outlet c2 and sixth outlet c3 of the third electric valve 38 to open, so that the target content is the second content.

[0223] When the ambient temperature is lower than the third preset value, the controller can open the first inlet a1, first outlet a2, and second outlet a3 of the first electric valve 35, open the second inlet b1, third outlet b2, and fourth outlet b3 of the second electric valve 37, and open the third inlet c1, fifth outlet c2, and sixth outlet c3 of the third electric valve 38, allowing the refrigerant in the refrigeration system 103 to circulate in each mechanism. This avoids the refrigerant from stagnating in a certain mechanism and reducing the amount of refrigerant participating in the refrigeration cycle.

[0224] Here, the second content is greater than the first content. It is understandable that the refrigerant in the refrigeration system 103 circulates through various mechanisms, resulting in a refrigerant content participating in the refrigeration cycle that is greater than the refrigerant content that participates in the refrigeration cycle after being stored in the defrosting heating tube 36.

[0225] Figure 14 is a schematic diagram showing the refrigerant flowing through various mechanisms in a refrigeration system according to some embodiments. It should be noted that during the refrigerant flow through these mechanisms, the compressor 31 is in a switched-off state. After the refrigerant has flowed for a period of time, the pressure inside the refrigeration system 103 will reach equilibrium, meaning that the pressure of each refrigerant in each mechanism of the refrigeration system 103 (such as the compressor, condenser, defrost heating tube, first evaporator, and second evaporator) will be the same or nearly the same. At this time, the refrigerant content in the defrost heating tube 36 is less than the refrigerant content in the defrost heating tube 36 when the ambient temperature is greater than or equal to a third preset value, resulting in a higher refrigerant content participating in the refrigeration cycle than the refrigerant content participating in the refrigeration cycle when the ambient temperature is greater than or equal to the third preset value.

[0226] In this embodiment, when the ambient temperature is high, controlling a portion of the refrigerant in the second evaporator 34 to flow to the defrosting heating tube 36 for storage reduces the amount of refrigerant participating in the refrigeration cycle, thereby lowering the operating pressure of the compressor 31. This allows the refrigeration system 103 to operate efficiently even in high-temperature environments, improving the refrigeration efficiency of the system. When the ambient temperature is not high, refrigeration can be carried out when the internal pressure of the refrigeration system is balanced. This ensures that the amount of refrigerant participating in the refrigeration cycle meets the refrigeration requirements at the current ambient temperature, guaranteeing the refrigeration efficiency of the system.

[0227] In some embodiments, if the ambient temperature is less than a third preset value, it can be further determined whether the ambient temperature is greater than or equal to a fourth preset value. If so, the refrigerant in the refrigeration system can be controlled to circulate in each mechanism.

[0228] Figure 15 is a flowchart illustrating another refrigerator control method according to some embodiments. The method can be executed by the controller of the refrigerator 10 described above. As shown in Figure 15, the method includes steps S1501 to S1505.

[0229] S1501. When a cooling demand is detected in the refrigerator, the ambient temperature of the environment where the refrigerator is located is obtained.

[0230] S1502. Determine whether the ambient temperature is greater than or equal to the third preset value. If yes, execute S1503; otherwise, execute S1504.

[0231] S1503, control the third outlet b2 and the fourth outlet b3 of the second electric valve 37 to close, and control the second outlet a3 of the first electric valve 35 to open, so that the target content is the first content.

[0232] S1504. Determine whether the ambient temperature is greater than or equal to the fourth preset value. If so, execute S1505.

[0233] Here, the fourth preset value is less than the third preset value. For example, the fourth preset value could be 18°C.

[0234] S1505, control the first inlet a1, first outlet a2 and second outlet a3 of the first electric valve 35 to open, control the second inlet b1, third outlet b2 and fourth outlet b3 of the second electric valve 37 to open, and control the third inlet c1, fifth outlet c2 and sixth outlet c3 of the third electric valve 38 to open.

[0235] In this embodiment, if it is determined that the ambient temperature is less than the third preset value, it can be further determined whether the ambient temperature is greater than or equal to the second preset value. If so, the refrigerant in the refrigeration system 103 can be controlled to circulate in each mechanism so that the pressure in the refrigeration system 103 reaches balance, and avoids the refrigeration efficiency of the refrigeration system 103 being affected by insufficient refrigerant content participating in the refrigeration cycle when the ambient temperature is low (e.g., less than the fourth preset value).

[0236] In some embodiments, if it is determined that the ambient temperature is less than a fourth preset value, the controller may adjust the refrigerant content participating in the refrigeration cycle in the refrigeration system 103 in the following manner.

[0237] Figure 16 is a flowchart illustrating another refrigerator control method according to some embodiments. The method can be executed by the controller of the refrigerator 10 described above. As shown in Figure 16, the method includes steps S1601 to S1605.

[0238] S1601. When a cooling demand is detected in the refrigerator 10, the ambient temperature of the environment where the refrigerator 10 is located is obtained.

[0239] S1602. Determine whether the ambient temperature is greater than or equal to the third preset value. If yes, proceed to S1603; otherwise, proceed to S1604.

[0240] S1603, control the third outlet b2 and the fourth outlet b3 of the second electric valve 37 to close, and control the second outlet a3 of the first electric valve 35 to open, so that the target content is the first content.

[0241] S1604. Determine whether the ambient temperature is greater than or equal to the fourth preset value. If not, proceed to S1605.

[0242] Here, the fourth preset value is less than the third preset value.

[0243] S1605, control the third outlet b2 and the fourth outlet b3 of the second electric valve 37 to close, control the fifth outlet c2 of the third electric valve 38 to open, and control the first outlet a2 of the first electric valve 35 to open, so that the target content is the third content, where the third content is greater than the second content.

[0244] When the ambient temperature is lower than the fourth preset value, the controller can close the third outlet b2 and the fourth outlet b3 of the second electric valve 37 to disconnect the passage between the condenser 32 and the first evaporator 33 and the second evaporator 34, respectively. It also controls the fifth outlet c2 of the third electric valve 38 and the first outlet a2 of the first electric valve 35 to open, allowing the refrigerant in the defrosting heating tube 36 to be discharged through the fifth outlet c2 of the third electric valve 38, thereby increasing the amount of refrigerant participating in the refrigeration cycle in the refrigeration system 103.

[0245] Understandably, at this time, the sixth outlet of the third electric valve 38 is closed, and the second outlet of the first electric valve 35 is closed. The inlets of the first electric valve 35, the second electric valve 37, and the third electric valve 38 are in the open state.

[0246] After controlling the first electric valve 35, the second electric valve 37 and the third electric valve 38, the compressor 31 can be started. After the compressor 31 is started, the refrigerant in the defrosting heating tube 36 can be discharged and the refrigerant flows to the condenser 32.

[0247] Figure 17 is a schematic diagram of the refrigerant flow direction when the refrigerant stored in the defrosting heating tube is discharged according to some embodiments. As shown in Figure 17, after the compressor 31 is turned on, the refrigerant in the defrosting heating tube 36 flows to the second evaporator 34. The refrigerant in the first evaporator 33 and the second evaporator 34 flows to the compressor 31 through the air inlet y2 of the compressor 31, and then flows to the condenser 32 through the exhaust port y1 of the compressor 31.

[0248] Understandably, in this case, due to the discharge of refrigerant from the defrosting heating tube 36, the amount of refrigerant participating in the refrigeration cycle in the refrigeration system 103 is greater than the second amount.

[0249] In this embodiment, when the ambient temperature is low (for example, when the ambient temperature is less than the fourth preset value), the refrigerant in the defrosting heating tube 36 can be extracted to increase the refrigerant content participating in the refrigeration cycle, which can maintain the condensing pressure of the condenser 32, thereby ensuring that the refrigerant can be effectively condensed, so as to improve the refrigeration efficiency of the refrigeration system 103 in a low-temperature environment.

[0250] In some embodiments, in order to improve the efficiency of regulating the refrigerant content participating in the refrigeration cycle within the refrigeration system 103, the controller performs control in the following manner:

[0251] If the ambient temperature is determined to be greater than or equal to a third preset value, then, while the compressor 31 is running for the eighth time, the controller closes the fifth outlet c2 and the sixth outlet c3 of the third electric valve 38, opens the first outlet a2 of the first electric valve 35, and opens at least one of the third outlet b2 or the fourth outlet b3 of the second electric valve 37. In other words, if at this ambient temperature, after the controller closes the third outlet b2 and the fourth outlet b3 of the second electric valve 37 and opens the second outlet a3 of the first electric valve 35, it can then, while the compressor 31 is running for the eighth time, control the first electric valve 35, the second electric valve 37, and the third electric valve 38 to put the refrigeration system 103 into refrigeration mode. This allows the refrigeration system 103 to control the refrigerant flow to the defrosting heating tube 36 for storage during the eighth time period, thus achieving the first flow rate regulation.

[0252] If the ambient temperature is determined to be lower than the fourth preset value, then while the compressor 31 is running for the ninth time, the controller closes the fifth outlet c2 and the sixth outlet c3 of the third electric valve 38, opens the first outlet a2 of the first electric valve 35, and opens at least one of the third outlet b2 or the fourth outlet b3 of the second electric valve 37. In other words, if at this ambient temperature, after the controller closes the third outlet b2 and the fourth outlet b3 of the second electric valve 37 and opens the second outlet a3 of the first electric valve 35, it can then control the first electric valve 35, the second electric valve 37, and the third electric valve 38 to put the refrigeration system 103 into refrigeration mode while the compressor 31 is running for the ninth time. This allows the refrigeration system 103 to control the refrigerant discharge from the defrost heating tube 36 within the ninth time period, thus achieving the third flow rate regulation.

[0253] If the ambient temperature is determined to be greater than or equal to the fourth preset value and less than the third preset value, then after controlling the third outlet b2 and fourth outlet b3 of the second electric valve 37 to open, the fifth outlet c2 and sixth outlet c3 of the third electric valve 38 to open, and the first outlet a2 and second outlet a3 of the first electric valve 35 to open for ten hours, the compressor 31 is started, and the fifth outlet c2 and sixth outlet c3 of the third electric valve 38 are closed, the first outlet a2 of the first electric valve 35 is opened, and at least one of the third outlet b2 or fourth outlet b3 of the second electric valve 37 is opened. That is, at this ambient temperature, after the controller controls the third outlet b2 and fourth outlet b3 of the second electric valve 37 to close and the second outlet a3 of the first electric valve 35 to open for nine hours, the first electric valve 35, the second electric valve 37, and the third electric valve 38 are then controlled to put the refrigeration system 103 into refrigeration mode. This allows the refrigeration system 103 to achieve pressure balance within the refrigeration system 103 within the ninth hour, i.e., to achieve the second flow rate regulation.

[0254] Here, the eighth duration is shorter than the tenth duration, and the tenth duration is shorter than the ninth duration. For example, the eighth duration could be 3 minutes, the ninth duration could be 15 minutes, and the tenth duration could be 10 minutes.

[0255] In this embodiment, the adjustment time of the refrigerant content participating in the refrigeration cycle in the refrigeration system 103 can be controlled to be different under different ambient temperatures, so that the refrigerant in the refrigeration system 103 has enough time to flow, thereby improving the efficiency of adjusting the refrigerant content participating in the refrigeration cycle in the refrigeration system 103.

[0256] In some embodiments, after the controller starts the compressor 31, it can control the compressor 31 to operate at a fourth speed, which is less than the maximum speed of the compressor 31. In some embodiments, the fourth speed may be 2100 rpm / min.

[0257] When compressor 31 needs to be operated to adjust the refrigerant content participating in the refrigeration cycle (e.g., when the ambient temperature is greater than or equal to the third preset value, or less than the fourth preset value), compressor 31 can be controlled to operate at a speed lower than its maximum speed to provide appropriate cycle power and prevent excessively high compressor speed from affecting the suction pressure of compressor 31. This allows for the adjustment of the refrigerant content participating in the refrigeration cycle of refrigeration system 103. When the ambient temperature is greater than or equal to the fourth preset value but less than the third preset value, controlling compressor 31 to operate at a speed lower than its maximum speed to refrigerate the freezer and refrigerator compartments can achieve energy savings.

[0258] In some embodiments, the refrigerator 10 supports a rapid cooling mode, which refers to the rapid cooling of the refrigerator compartment. Compared to the standard cooling mode, the rapid cooling mode allows the temperature of the refrigerator compartment to be lower than or equal to the required cooling temperature in a shorter time. In some embodiments, when a user needs a large amount of cold drinks in the summer, the refrigerator 10's cooling system 103 can be triggered to enter the rapid cooling mode.

[0259] In some embodiments, the user can trigger the mode on the refrigerator's display panel or through a corresponding application in the terminal device controlling the refrigerator, so that when the refrigerator receives the instruction for the corresponding cooling mode, it controls the cooling system 103 to enter the rapid cooling mode to meet the user's rapid cooling needs.

[0260] The following explains how a refrigerator achieves a rapid cooling mode to improve cooling efficiency and quickly cool the refrigerator compartment.

[0261] Figure 18 is another structural schematic diagram of a refrigeration system according to some embodiments. As shown in Figure 18, the sixth outlet c3 of the third electric valve 38 can be connected to the outlet of the condenser 32.

[0262] In some embodiments, the sixth outlet c3 of the third electric valve 38 may not be connected to the outlet of the condenser 32 without a throttling device, i.e., they may be connected only through a pipeline.

[0263] In some embodiments, when the refrigeration system 103 is in rapid cooling mode, the compressor 31 operates at a fifth speed, the fourth outlet b3 of the second electric valve 37 is opened, the first outlet a2 of the first electric valve 35 is opened, the third inlet c1 of the third electric valve 38 is closed, and the fifth outlet c2 and the sixth outlet c3 of the third electric valve 38 are opened.

[0264] Figure 19 is a schematic diagram of the refrigerant flow in rapid cooling mode of a refrigeration system according to some embodiments. As shown in Figure 19, the refrigerant flowing out of the condenser 32 passes sequentially through the sixth outlet c3 of the third electric valve 38, the fifth outlet c2 of the third electric valve 38, and the first throttling device 39, and then flows to the second evaporator 34. At the same time, the refrigerant flowing out of the condenser 32 also passes through the fourth outlet b3 of the second electric valve 37 and the fourth throttling device 40, and then flows to the second evaporator 34, thereby achieving cooling for the refrigerator compartment. Subsequently, the refrigerant flowing out of the second evaporator 34 enters the compressor 31 along the pipeline, completing the refrigeration cycle.

[0265] Here, the fifth speed is less than the maximum speed of compressor 31. For example, if the maximum speed of compressor 31 is 4500 rpm, the fifth speed can be 4000 rpm or 3900 rpm, which are lower than the maximum speed. When the refrigerant flow rate between condenser 32 and second evaporator 34 increases, compressor 31 can meet the rapid cooling needs of the refrigerator compartment without operating at its maximum speed, thus reducing the workload of compressor 31 and reducing energy consumption.

[0266] In this embodiment, when the refrigeration system 103 is in rapid refrigeration mode, the refrigerant flowing out of the condenser 32 flows to the second evaporator 34 through the parallel fourth throttling device 40 and the first throttling device 39, which makes the flow of refrigerant larger, improves the refrigeration effect of the second evaporator 34, and controls the compressor 31 to run at a higher speed, which can achieve the purpose of rapid refrigeration of the refrigerator compartment.

[0267] Figure 20 is a schematic diagram of the refrigerant flow when the refrigeration system is in rapid cooling mode and simultaneously cooling the freezer compartment according to some embodiments. In some embodiments, referring to Figure 20, when the refrigeration system 103 is in rapid cooling mode, if there is a cooling demand in the freezer compartment, the controller can control the third outlet b2 of the second electric valve 37 to open, so that the refrigerant flowing out of the condenser 32 can simultaneously flow to the first evaporator 33, so that the first evaporator 33 cools the freezer compartment to meet the cooling demand of the freezer compartment.

[0268] In some embodiments, as shown in FIG20, a second throttling device 42 may be provided in the passage between the sixth outlet c3 of the third electric valve 38 and the outlet of the condenser 32.

[0269] In rapid cooling mode, a second throttling device 42 is installed in the passage between the sixth outlet c3 of the third electric valve 38 and the outlet of the condenser 32. This allows the refrigerant flowing out of the outlet of the condenser 32 to be throttled and depressurized by the second throttling device 42, and then sequentially pass through the sixth outlet c3 and the fifth outlet c2 of the third electric valve 38. After that, it flows to the first throttling device 39 for further throttling and depressurization before flowing to the second evaporator 34. This allows the refrigerant to reduce its pressure more smoothly in this passage. The smooth pressure drop can reduce the flash evaporation phenomenon of the refrigerant (i.e., the liquid refrigerant partially turns into gas), thereby allowing more refrigerant to enter the second evaporator 34 in liquid form and improving the heat exchange efficiency of the second evaporator 34.

[0270] In some embodiments, after the fourth outlet b3 of the second electric valve 37 is opened, the first outlet a2 of the first electric valve 35 is opened, and the fifth outlet c2 and the sixth outlet c3 of the third electric valve 38 are opened, the controller can control the compressor 31 to operate at a sixth speed. After the compressor 31 operates at the sixth speed for a preset time, the controller controls the compressor 31 to operate at the fifth speed until the refrigeration system 103 exits the rapid cooling mode.

[0271] Here, the sixth speed is less than the fifth speed. For example, the sixth speed can be 2100 rpm / min, and the preset duration can be 5 minutes.

[0272] By controlling the compressor 31 to run at a lower speed for a period of time before running at a higher speed when starting it, the mechanical shock and wear of the compressor 31 during startup can be reduced. Then, it can transition to higher speed operation in a more stable state, reducing the wear of mechanical parts and thus protecting the compressor 31.

[0273] After defrosting the frost on the first evaporator 33, the temperature of the surface of the first evaporator 33 and the temperature of the compartments (such as the freezer and refrigerator compartments) will rise. At this time, the compressor 31 can be controlled to run at its maximum speed to achieve rapid cooling of the freezer and refrigerator compartments. However, the high-speed operation of the compressor 31 will result in greater noise. Currently, the noise can be reduced by lowering the speed of the compressor 31, but this will reduce the cooling speed, leading to a decrease in cooling effect and affecting the food stored in the freezer and refrigerator compartments.

[0274] The following explains how to reduce the noise generated when a refrigerator enters cooling mode after defrosting to cool the compartments.

[0275] Figure 21 is a flowchart illustrating a noise reduction control method for a refrigerator according to some embodiments. The method can be executed by the controller of the refrigerator 10. As shown in Figure 21, the method includes steps S2101 to S2104.

[0276] S2101. When the refrigeration system 103 exits the defrosting mode, control the compressor 31 to stop.

[0277] When the refrigeration system 103 exits the defrost mode, the controller can control the compressor 31 to stop, so as to avoid the pressure and flow in the refrigeration system 103 from fluctuating drastically due to the compressor 31 switching various electric valves during operation, which would affect the stability and reliability of the refrigeration system 103.

[0278] S2102, control the first electric valve 35 to connect the passage between the compressor 31 and the condenser 32, and control the outlet of the defrosting heating tube 36 to close through the third electric valve 38.

[0279] After the compressor 31 is stopped, the controller can control the first electric valve 35 to connect the passage between the compressor 31 and the condenser, and cut off the passage between the compressor 31 and the defrost heating tube 36. The controller can also control the outlet of the defrost heating tube 36 to close through the third electric valve 38, that is, cut off the passage between the defrost heating tube 36 and the second evaporator 34, so that after the compressor 31 is started, the refrigerant flowing out of the exhaust port of the compressor 31 enters the condenser through the first electric valve 35.

[0280] For example, the first inlet a1 and first outlet a2 of the first electric valve 35 can be opened, allowing the refrigerant flowing from the discharge port y1 of the compressor 31 to flow through the first electric valve 35 to the condenser 32. Understandably, at this time, the second outlet a3 of the first electric valve 35 is closed. And the fifth outlet c2 and sixth outlet c3 of the third electric valve 38 are also closed. Understandably, at this time, the third outlet b2 and fourth outlet b3 of the second electric valve 37 are closed.

[0281] S2103, control the compressor 31 to start, and control the second electric valve 37 to perform at least one of the following: connect the passage between the condenser and the first evaporator 33, or connect the passage between the condenser and the second evaporator 34.

[0282] After switching between the first electric valve 35 and the third electric valve 38, the compressor 31 can be started, and at least one of the third outlet b2 or the fourth outlet b3 of the second electric valve 37 can be opened.

[0283] S2104. Control the third electric valve 38 to connect the passage between the defrosting heating tube 36 and the second evaporator 34, so that the refrigerant in the defrosting heating tube 36 enters the second evaporator 34 along the first throttling device 39.

[0284] After controlling the first electric valve 35 to open the passage between the compressor 31 and the condenser 32, and controlling the third electric valve 38 to close the outlet of the defrosting heating tube 36 (i.e., controlling the fifth outlet c2 and the sixth outlet c3 of the third electric valve 38), the controller can control the compressor 31 to start. The controller can control the second electric valve 37 to perform at least one of the following: opening the passage between the first evaporator 33 and the condenser 32, or opening the passage between the second evaporator 34 and the condenser. The controller can also control the third electric valve 38 to open the passage between the defrosting heating tube 36 and the second evaporator 34, so that the refrigerant stored in the defrosting heating tube 36 in defrosting mode flows slowly along the first throttling device 39 to the second evaporator 34, thereby slowly increasing the amount of refrigerant participating in the cycle in defrosting mode.

[0285] In some embodiments, the controller controls the second electric valve 37 to connect the passage between the first evaporator 33 and the condenser 32, and to connect the passage between the second evaporator 34 and the condenser 32. For example, the passage between the first evaporator 33 and the condenser 32 may be connected first to achieve cooling in the freezer compartment; after the freezer compartment has finished cooling, the passage between the first evaporator 33 and the condenser 32 may be disconnected, and the passage between the second evaporator 34 and the condenser may be connected to achieve cooling in the refrigerator compartment. After defrosting, the freezer compartment is cooled first, followed by the refrigerator compartment, to prevent temperature-sensitive foods stored in the freezer compartment from spoiling due to temperature increases.

[0286] For example, after the compressor 31 is started, the controller can open the third outlet b2 of the second electric valve 37, connecting the first evaporator 33 and the condenser to cool the freezer compartment. When the freezer compartment is cooling, the controller opens the fourth outlet b3 of the second electric valve 37, connecting the second evaporator 34 to cool the refrigerator compartment. When the refrigerator compartment is cooling, the controller closes the fifth outlet c2 and the sixth outlet c3 of the third electric valve 38, closing the outlet of the defrosting heating element 36 and stopping the compressor 31.

[0287] In some embodiments, when cooling the freezer compartment, the controller can detect the temperature of the freezer compartment. If the temperature of the freezer compartment reaches (is less than or equal to) the set temperature of the freezer compartment, it can be determined that the cooling of the freezer compartment is complete. When cooling the refrigerator compartment, the controller can detect the temperature of the refrigerator compartment. If the temperature of the refrigerator compartment reaches (e.g., equal to) the set temperature of the refrigerator compartment, it can be determined that the cooling of the refrigerator compartment is complete.

[0288] Figure 22 is a schematic diagram of the refrigerant flow direction during the first cooling after the defrost mode ends in a refrigerator according to some embodiments. The arrows in Figure 22 indicate the refrigerant flow direction. As shown in Figure 22, the third outlet b2 of the second electric valve 37 is opened, which opens the passage between the condenser 32 and the first evaporator 33 and closes the passage between the condenser 32 and the second evaporator 34 to achieve cooling of the freezer compartment. After the compressor 31 is turned on, the refrigerant stored in the defrost heating tube 36 will slowly flow along the first throttling device 39 to the second evaporator 34 to gradually increase the refrigerant content participating in the refrigeration cycle.

[0289] Understandably, the example in Figure 22 shows the flow of refrigerant when cooling the freezer compartment after defrosting.

[0290] In this embodiment, when the refrigeration system 103 exits the defrost mode, the compressor 31 is stopped. The first electric valve 35 is controlled to open the passage between the compressor 31 and the condenser 32, and the outlet of the defrost heating tube 36 is closed via the third electric valve 38. Then, the compressor 31 is started. The second electric valve 37 is controlled to perform at least one of the following: open the passage between the condenser 32 and the first evaporator 33, or open the passage between the condenser 32 and the second evaporator. Then, the controller controls the third electric valve 38 to open the passage between the defrost heating tube 36 and the second evaporator 34, so that the refrigerant in the defrost heating tube 36 enters the second evaporator 34 along the first throttling device 39, thereby gradually increasing the refrigerant content participating in the refrigeration cycle. This allows the load power of the compressor 31 to gradually increase without causing a significant increase in noise, thus reducing the noise of the refrigerator cooling the compartments after entering the refrigeration mode following defrost.

[0291] Before the controller controls the third electric valve 38 to connect the defrosting heating tube 36 and the second evaporator 34, it can control the speed of the compressor 31 to further reduce the noise generated by the operation of the compressor 31.

[0292] Figure 23 is a flowchart illustrating another noise reduction control method for a refrigerator according to some embodiments. This method can be applied to the controller of the refrigerator 10 described above. As shown in Figure 23, the method includes steps S2301 to S2302.

[0293] S2301. After the compressor 31 is started, the compressor 31 is controlled to run at the seventh speed.

[0294] After the controller starts the compressor 31, it can control the compressor 31 to run at a seventh speed. For example, the seventh speed can be 1500 rpm.

[0295] In some embodiments, after the controller controls the compressor 31 to run at a seventh speed, it can control the third electric valve 38 to connect the passage between the first evaporator 33 and the condenser 32, so as to cool the freezer compartment.

[0296] S2302. After the compressor 31 has been running at the seventh speed for eleven hours, control the compressor 31 to run at the eighth speed.

[0297] After compressor 31 has been running at the seventh speed for an eleventh time, the controller can control compressor 31 to run at an eighth speed, where the eighth speed is greater than the seventh speed. For example, the eighth speed could be 2100 rpm. The eleventh time could be 5 minutes.

[0298] In some embodiments, after the controller controls the compressor 31 to run at an eighth speed, it can control the third electric valve 38 to connect the passage between the defrosting heating tube 36 and the second evaporator 34, so that the compressor 31 can more effectively extract refrigerant from the second evaporator 34 at the eighth speed.

[0299] In this embodiment, the compressor 31 can be controlled to run at a lower speed first, and then the speed of the compressor 31 can be increased. This can effectively reduce starting shock, mechanical wear, and vibration transmission, thereby reducing noise. Moreover, the compressor 31 is more effective at drawing refrigerant from the second evaporator 34 at the eighth speed.

[0300] When the refrigeration system 103 exits the defrosting mode, that is, after defrosting is completed, the controller controls the compressor 31 to start. The controller can determine whether to reduce noise by controlling the refrigerant flow based on the time period when defrosting is completed. Noise reduction can be performed during the time period when the user needs to rest, so as not to disturb the user's rest.

[0301] Figure 24 is a flowchart illustrating another noise reduction control method for a refrigerator according to some embodiments. This method can be applied to the controller of the refrigerator 10 described above. As shown in Figure 24, the method includes steps S2401 to S2405.

[0302] S2401. When the refrigeration system 103 exits the defrosting mode, control the compressor 31 to stop.

[0303] S2402, control the first electric valve 35 to connect the passage between the compressor 31 and the condenser 32, and control the outlet of the defrosting heating tube 36 to close through the third electric valve 38.

[0304] S2403, control the compressor 31 to start, and control the second electric valve 37 to perform at least one of the following: connect the passage between the condenser 32 and the first evaporator 33, or connect the passage between the condenser 32 and the second evaporator 34.

[0305] S2404. Determine the time period in which the refrigeration system 103 exits the defrost mode. The time period includes a preset time period and a non-preset time period.

[0306] In some embodiments, the preset time period can be the time period during which the user needs to rest, such as 21:00-8:00, and the non-preset time period can be the time period during which the user is out or does not need to rest, such as after 8:00 and before 21:00.

[0307] In some embodiments, the time period during which a user needs to rest may be 21:00-8:00 from Monday to Friday, and Saturday and Sunday. The time period during which a user is out or does not need to rest may be after 8:00 and before 21:00 from Monday to Friday.

[0308] In some embodiments, the preset time period and the non-preset time period can be set according to the user's instructions. For example, the user can input the preset time period and the non-preset time period through an application on the terminal device controlling the refrigerator, or through a display panel on the refrigerator door. The controller can be set based on the information input by the user.

[0309] S2405. If the time period is a preset time period, control the third electric valve 38 to connect the passage between the defrosting heating tube 36 and the second evaporator 34.

[0310] If the time period when the refrigeration system 103 exits the defrost mode is a preset time period, noise reduction can be achieved by controlling the flow of refrigerant. That is, the third electric valve 38 is controlled to connect the passage between the defrost heating tube 36 and the second evaporator 34, so that the refrigerant in the defrost heating tube 36 slowly enters the second evaporator 34 along the first throttling device 39.

[0311] In this embodiment, after the compressor 31 is turned on, noise reduction can be achieved by controlling the refrigerant flow during the user's rest period, based on the time period when the defrosting mode is exited, so as to avoid disturbing the user's rest.

[0312] In some embodiments, if the time period in which the refrigeration system 103 exits the defrost mode is not a preset time period, when refrigerating the freezer and refrigerator compartments in the first refrigeration after exiting the defrost mode, the refrigerant content participating in the defrost cycle can be increased at a higher speed to improve refrigeration efficiency.

[0313] In some embodiments, when the refrigeration system 103 exits the defrost mode, the compressor 31 is stopped. The outlet of the defrost heating element 36 is closed via the third electric valve 38. The first electric valve 35 is used to connect the defrost heating element and the condenser. After a twelfth time interval following the first electric valve 35 connecting the defrost heating element 36 and the condenser, the first electric valve 35 is used to connect the compressor 31 and the condenser 32, and close the connection between the compressor 31 and the defrost heating element 36. Then, the compressor 31 is started, and the second electric valve 37 is used to connect the connections between the condenser 32 and the first evaporator 33, and between the condenser 32 and the second evaporator 34, thereby achieving refrigeration for the freezer and refrigerator compartments.

[0314] Understandably, during the twelfth time period after the first electric valve 35 connects the passage between the defrosting heating tube 36 and the condenser 32, the refrigerant in the defrosting heating tube 36 flows to the condenser 32 through the first electric valve 35, thereby increasing the amount of refrigerant participating in the defrosting cycle. Compared to the speed at which the defrosting heating tube 36 flows to the second evaporator 34 through the first throttling device 39, the speed at which the refrigerant flows through the first electric valve 35 through the defrosting heating tube 36 is faster, which can improve refrigeration efficiency.

[0315] In some embodiments, the first throttling device 39 disposed between the third electric valve 38 and the second evaporator 34 can be a capillary tube, that is, a capillary tube with a fixed flow rate is used as the first throttling device 39. This allows the refrigerator 10 to control the refrigerant flow into the second evaporator 34 slowly through the capillary tube when performing noise reduction by controlling the refrigerant flow rate, so that the load power of the compressor 31 will gradually increase without causing a significant increase in noise.

[0316] In some embodiments, the first throttling device 39 disposed between the third electric valve 38 and the second evaporator 34 may be a flow regulating valve with adjustable flow rate. The controller can adjust the flow rate of the refrigerant entering the second evaporator 34 by adjusting the flow rate of the first throttling device 39.

[0317] In some embodiments, before controlling the third electric valve 38 to connect the passage between the defrosting heating tube 36 and the second evaporator 34, the controller can adjust the flow rate of the first throttling device 39 according to the compartment temperature of the freezer compartment to control the flow rate of refrigerant in the defrosting heating tube 36 to the second evaporator 34.

[0318] The following example illustrates how, after defrosting, the refrigeration system 103 first cools the freezer compartment, and the controller can adjust the flow rate of the flow regulating valve according to the temperature of the freezer compartment.

[0319] Figure 25 is a flowchart illustrating another noise reduction control method for a refrigerator according to some embodiments. This method can be applied to the controller of the refrigerator 10 described above. As shown in Figure 25, the method includes steps S2501 to S2502.

[0320] S2501, Obtain the temperature of the freezer compartment.

[0321] In some embodiments, the controller can obtain the compartment temperature of the freezer compartment through a temperature sensor located in the freezer compartment.

[0322] S2502. Based on the room temperature, control the flow rate of the flow regulating valve to be equal to the target flow rate, where the target flow rate is less than the maximum flow rate of the flow regulating valve.

[0323] After obtaining the temperature of the freezer compartment, the controller can adjust the flow rate of the flow regulating valve to the target flow rate based on the temperature of the compartment.

[0324] In some embodiments, when the room temperature is greater than or equal to a preset temperature, the target flow rate is determined as a first flow rate. When the room temperature is less than the preset temperature, the target flow rate is determined as a second flow rate, where the second flow rate is less than the first flow rate.

[0325] It is understandable that when the first flow rate and the second flow rate differ significantly, the cooling speed of the refrigeration system for the freezer compartment when the target flow rate is the first flow rate is greater than the cooling speed of the refrigeration system 103 for the freezer compartment when the target flow rate is the second flow rate. However, the noise generated by the compressor 31 when the target flow rate is the second flow rate is less than the noise generated by the compressor 31 when the target flow rate is the first flow rate.

[0326] In some embodiments, the preset temperature can be 0°C. When the temperature of the freezer compartment is greater than 0°C, it indicates that the temperature of the freezer compartment has risen due to defrosting. In this case, the flow regulating valve can be controlled to allow the refrigerant to flow at a larger flow rate, so that the refrigeration system 103 can cool the freezer compartment more quickly. When the temperature of the freezer compartment is less than 0°C, it indicates that the temperature of the freezer compartment has not risen to the preset temperature due to defrosting. In this case, the flow regulating valve can be controlled to allow the refrigerant to flow at a smaller flow rate, which can further reduce the noise of the compressor 31.

[0327] In other words, when the compartment temperature is high, controlling the flow regulating valve to allow for a larger flow rate can increase the cooling speed of the freezer compartment while reducing the noise of the compressor 31. When the compartment temperature is low, controlling the flow regulating valve to allow for a smaller flow rate can further reduce the noise of the compressor 31.

[0328] In some embodiments, the controller can determine the target flow rate based on a correspondence between multiple compartment temperatures and the flow rate corresponding to each compartment temperature.

[0329] In this embodiment, a flow regulating valve can be installed in the passage between the defrosting heating tube 36 and the second evaporator 34. The flow rate of the flow regulating valve can be controlled according to the temperature of the freezer compartment when the refrigeration ends. When the temperature of the compartment is high, the flow regulating valve can be controlled to flow at a larger flow rate, which can improve the refrigeration speed of the freezer compartment while reducing the noise of the compressor 31.

[0330] This disclosure also provides a computer-readable storage medium, which may include various media capable of storing program code, such as a USB flash drive, a portable hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk. In some embodiments, the computer-readable storage medium stores computer-executable instructions, which are executed by a computer to implement the technical solutions shown in the above embodiments.

[0331] This disclosure also provides a program product including executable instructions stored in a readable storage medium. When the computer program is executed by a computer, the technical solutions shown in some of the above embodiments are executed. The implementation method and technical effects are similar, and will not be repeated here.

[0332] It should be noted that any one of the technical solutions disclosed in this disclosure can solve one or more of the above-mentioned technical problems and achieve a certain inventive purpose to a certain extent; multiple technical disclosures can also be combined into an overall solution to solve one or more of the above-mentioned technical problems and achieve a certain inventive purpose; some technical disclosures can also be selected and combined into an overall solution, while adopting related technologies and deteriorating solutions, but the deterioration trend can be compensated by the means of this technical disclosure, and the overall solution can solve one or more of the above-mentioned technical problems and achieve a certain inventive purpose to a certain extent; each technical disclosure combined into a complete technical solution constitutes an organic and indivisible overall solution, which solves the technical problems and achieves a certain inventive purpose as a whole.

[0333] Any technical disclosure in this disclosure, as well as the recombination of multiple technical disclosures, can form a complete technical solution and solve one or more of the aforementioned technical problems, thereby achieving the inventive objective. All of these fall under the content of this disclosure and are directly and unambiguously determined based on the content of this disclosure.

[0334] Those skilled in the art will understand that the scope of this invention is not limited to the specific embodiments described above, and that modifications and substitutions can be made to certain elements of the embodiments without departing from the spirit of this application. The scope of this application is limited by the appended claims.

Claims

1. A refrigerator comprising: a cabinet comprising a refrigeration chamber and a freezer chamber; a refrigeration system disposed within the cabinet, the refrigeration system comprising: a compressor; a condenser; a first evaporator capable of refrigerating the freezer chamber; a second evaporator capable of refrigerating the refrigeration chamber; a defrosting heating pipe disposed at a bottom of the first evaporator; a first electric valve; a second electric valve; and a first throttling device disposed between the first evaporator and the second evaporator; wherein an exhaust port of the compressor is in communication with a first inlet of the first electric valve, the condenser is in communication with a first outlet of the first electric valve, a second outlet of the first electric valve is in communication with the first throttling device through the defrosting heating pipe; an outlet of the condenser is in communication with a second inlet of the second electric valve, a third outlet of the second electric valve is in communication with the first evaporator, a fourth outlet of the second electric valve is in communication with the second evaporator; an outlet of the first evaporator and an outlet of the second evaporator are in communication with an intake port of the compressor, respectively; a controller electrically connected with the refrigeration system and configured to: control the compressor to stop running in case that it is detected that the first evaporator has a defrosting demand; acquire an ambient temperature of an environment where the refrigerator is located; control the first inlet and the second outlet of the first electric valve to open if it is determined that the ambient temperature is less than a first preset value; control the compressor to start running. 2.The refrigerator of claim 1, wherein, the refrigeration system further comprises a third electric valve and a second throttling device, the second throttling device is disposed between the third electric valve and the condenser; after acquiring the ambient temperature of the environment where the refrigerator is located, the controller is further configured to: control the first inlet and the second outlet of the first electric valve to open, control a sixth outlet of the third electric valve to open, and control at least one of the third outlet or the fourth outlet of the second electric valve to open, and control the compressor to start running if it is determined that the ambient temperature is less than the first preset value. 3.The refrigerator according to claim 2, wherein, the controller is further configured to: control the first inlet and the second outlet of the first electric valve and a fifth outlet of the third electric valve to open, and control the compressor to start running if the ambient temperature is greater than or equal to the first preset value.

4. The refrigerator of claim 3, wherein, the controller is further configured to: control the third outlet and the fourth outlet of the second electric valve to open; control the second outlet of the first electric valve to open in case that the third outlet and the fourth outlet of the second electric valve are opened for a first time duration; control the fifth outlet of the third electric valve to open and control the third outlet and the fourth outlet of the second electric valve to close in case that a running duration of the compressor is equal to a second duration. 5.The refrigerator according to claim 4, wherein, the controller is further configured to: control the compressor to run at a first rotating speed before controlling the fifth outlet of the third electric valve to open. after the fifth outlet of the third electric valve is controlled to open and the third outlet and the fourth outlet of the second electric valve are controlled to close, if it is determined that the ambient temperature is greater than or equal to a second preset value, the compressor is controlled to operate at a second rotating speed for a third time length after the compressor is controlled to continue operating at the first rotating speed for the third time length; wherein the second rotating speed is greater than the first rotating speed, and the second preset value is greater than the first preset value. 6.The refrigerator of claim 2, wherein, The controller is further configured to: control the first inlet and the second outlet of the first electric valve to open for a fourth time length after the sixth outlet of the third electric valve is controlled to open for the fourth time length; and control at least one of the third outlet or the fourth outlet of the second electric valve to open after the operating time length of the compressor is controlled to be equal to a fifth time length.

7. The refrigerator of claim 6, wherein, After the control of the at least one of the third outlet or the fourth outlet of the second electric valve, the controller is further configured to: control the compressor to operate at a fourth rotating speed for a sixth time length after the compressor is controlled to operate at a third rotating speed for the sixth time length; wherein the third rotating speed is less than the first rotating speed, and the fourth rotating speed is greater than the third rotating speed. 8.The refrigerator according to any one of claims 2 to 7, wherein, The controller is further configured to: control the compressor to shut down and control the first inlet of the first electric valve to close and the first outlet and the second outlet to open after the defrosting of the first evaporator is completed; control the first inlet and the first outlet of the first electric valve to open and the second outlet of the first electric valve to close after the first inlet of the first electric valve is controlled to close and the first outlet and the second outlet are controlled to open for a seventh time length; and control the compressor to start and control the third outlet and the fourth outlet of the second electric valve to open. 9.The refrigerator of claim 8, wherein, The controller is further configured to: control the third outlet of the second electric valve to open; control the fourth outlet of the second electric valve to open after the refrigeration of the freezer compartment is completed; and control the compressor to shut down after the refrigeration of the refrigerator compartment is completed. 10.The refrigerator according to any one of claims 2 to 9, wherein, The controller is further configured to: acquire an ambient temperature of an environment in which the refrigerator is located after detecting that the refrigerator has a refrigeration demand; adjust a refrigerant participation amount in a refrigeration cycle in the refrigeration system to a target content through the first electric valve, the second electric valve, and the third electric valve according to the ambient temperature; and control the fifth outlet and the sixth outlet of the third electric valve to close, the first outlet of the first electric valve to open, and at least one of the third outlet or the fourth outlet of the second electric valve to open. 11.The refrigerator of claim 10, wherein, The controller is further configured to: if it is determined that the ambient temperature is greater than or equal to a third preset value, control the third outlet and the fourth outlet of the second electric valve to close and the second outlet of the first electric valve to open, so that the target content reaches a first content. If it is determined that the ambient temperature is less than the third preset value, the first inlet, the first outlet and the second outlet of the first electric valve are controlled to be open, the second inlet, the third outlet and the fourth outlet of the second electric valve are controlled to be open, and the third inlet, the fifth outlet and the sixth outlet of the third electric valve are controlled to be open, so that the target content reaches the second content. 12.The refrigerator of claim 11, wherein, The controller is further configured to: If it is determined that the ambient temperature is greater than or equal to the third preset value, the fifth outlet and the sixth outlet of the third electric valve are controlled to be closed, the first outlet of the first electric valve is controlled to be open, and at least one of the third outlet or the fourth outlet of the second electric valve is controlled to be open, in a case that the compressor is controlled to run for an eighth time length.

13. The refrigerator according to claim 11 or 12, wherein, The controller is further configured to: If it is determined that the ambient temperature is less than the third preset value and greater than or equal to a fourth preset value, the first inlet, the first outlet and the second outlet of the first electric valve are controlled to be open, the second inlet, the third outlet and the fourth outlet of the second electric valve are controlled to be open, and the third inlet, the fifth outlet and the sixth outlet of the third electric valve are controlled to be open; If it is determined that the ambient temperature is less than the fourth preset value, the third outlet and the fourth outlet of the second electric valve are controlled to be closed, the fifth outlet of the third electric valve is controlled to be open, and the first outlet of the first electric valve is controlled to be open, so that the target content is a third content; The fourth preset value is less than the third preset value, and the third content is greater than the second content. 14.The refrigerator according to claim 13, wherein, The controller is further configured to: If it is determined that the ambient temperature is less than the fourth preset value, the fifth outlet and the sixth outlet of the third electric valve are controlled to be closed, the first outlet of the first electric valve is controlled to be open, and at least one of the third outlet or the fourth outlet of the second electric valve is controlled to be open, in a case that the compressor is controlled to run for a ninth time length. If it is determined that the ambient temperature is greater than or equal to the fourth preset value and less than the third preset value, the compressor is controlled to be started, in a case that the second electric valve is controlled to be open, the third electric valve is controlled to be open, and the first electric valve is controlled to be open for a tenth time length. The tenth time length is less than the ninth time length. 15.The refrigerator according to any one of claims 2 to 14, wherein, The controller is further configured to: In a case that the refrigeration system is in a fast refrigeration mode, the compressor is controlled to run at a fifth rotating speed, the fourth outlet of the second electric valve is controlled to be open, the first outlet of the first electric valve is controlled to be open, the third inlet of the third electric valve is controlled to be closed, and the fifth outlet and the sixth outlet of the third electric valve are controlled to be open. 16.The refrigerator according to any one of claims 2 to 15, wherein, The controller is further configured to: In a case that the refrigeration system exits the defrosting mode, the compressor is controlled to be stopped; controlling the first electric valve to open a passage between the compressor and the condenser, and controlling the third electric valve to close an air outlet of the defrosting heating pipe; controlling the compressor to start, and controlling the second electric valve to at least one of: open a passage between the condenser and the first evaporator, or open a passage between the condenser and the second evaporator; controlling the third electric valve to open a passage between the defrosting heating pipe and the second evaporator.

17. The refrigerator of claim 16, wherein, After the controlling the compressor to start, and controlling the second electric valve to at least one of: open a passage between the condenser and the first evaporator, or open a passage between the condenser and the second evaporator, the controller is further configured to: determining a time period in which the time point that the refrigeration system exits the defrosting mode is located, wherein the time period includes a preset time period and a non-pre-set time period; if it is determined that the time period is the preset time period, controlling the third electric valve to open a passage between the defrosting heating pipe and the second evaporator.

18. The refrigerator according to claim 16 or 17, wherein, The controller is further configured to: obtaining a chamber temperature of the freezer; controlling the flow of the first throttling device to be equal to a target flow according to the chamber temperature, the target flow being less than a maximum flow of the first throttling device.

19. A refrigerator comprising: a cabinet including a refrigerating chamber and a freezing chamber; a refrigeration system disposed in the cabinet, the refrigeration system comprising: a compressor; a condenser; a first evaporator capable of refrigerating the freezing chamber; a second evaporator capable of refrigerating the refrigerating chamber; a defrosting heating pipe disposed at the bottom of the first evaporator; a first electric valve; a second electric valve; and a third electric valve; a first throttling device disposed between the third electric valve and the second evaporator; and a second throttling device disposed between the third electric valve and the condenser; wherein the air outlet of the compressor is in communication with a first inlet of the first electric valve, the condenser is in communication with a first outlet of the first electric valve, a second outlet of the first electric valve is in communication with a third inlet of the third electric valve through the defrosting heating pipe; a fifth outlet of the third electric valve is in communication with the second evaporator through the first throttling device, a sixth outlet of the third electric valve is in communication with an inlet of the condenser through the second throttling device; an outlet of the condenser is in communication with a second inlet of the second electric valve, a third outlet of the second electric valve is in communication with the first evaporator, and a fourth outlet of the second electric valve is in communication with the second evaporator; an outlet of the first evaporator and an outlet of the second evaporator are respectively in communication with an air inlet of the compressor; a controller electrically connected with the refrigeration system and configured to: controlling the compressor to stop in case that it is detected that the first evaporator has a defrosting demand; obtaining an ambient temperature of an environment in which the refrigerator is located; If it is determined that the ambient temperature is less than a first preset value, the first inlet and the second outlet of the first electric valve are controlled to be opened, the sixth outlet of the third electric valve is controlled to be opened, and at least one of the third outlet or the fourth outlet of the second electric valve is controlled to be opened. The compressor is controlled to be started. 20.A control method of a refrigerator, wherein, The refrigerator comprises: a cabinet comprising a refrigerating chamber and a freezing chamber; a refrigeration system arranged in the cabinet, the refrigeration system comprising: a compressor; a condenser; a first evaporator capable of refrigerating the freezing chamber; a second evaporator capable of refrigerating the refrigerating chamber; a defrosting heating pipe arranged at the bottom of the first evaporator; a first electric valve; a second electric valve; a third electric valve; a first throttling device arranged between the third electric valve and the second evaporator; and a second throttling device arranged between the third electric valve and the condenser; wherein the discharge port of the compressor is in communication with the first inlet of the first electric valve, the condenser is in communication with the first outlet of the first electric valve, the second outlet of the first electric valve is in communication with the third inlet of the third electric valve through the defrosting heating pipe, the fifth outlet of the third electric valve is in communication with the second evaporator through the first throttling device, the sixth outlet of the third electric valve is in communication with the inlet of the condenser through the second throttling device, the outlet of the condenser is in communication with the second inlet of the second electric valve, the third outlet of the second electric valve is in communication with the first evaporator, the fourth outlet of the second electric valve is in communication with the second evaporator, and the outlet of the first evaporator and the outlet of the second evaporator are respectively in communication with the suction port of the compressor. The method comprises: in a case where it is detected that the first evaporator has a defrosting demand, the compressor is controlled to be stopped; an ambient temperature of an environment in which the refrigerator is located is acquired; if it is determined that the ambient temperature is less than a first preset value, the first inlet and the second outlet of the first electric valve are controlled to be opened, the sixth outlet of the third electric valve is controlled to be opened, and at least one of the third outlet or the fourth outlet of the second electric valve is controlled to be opened; the compressor is controlled to be started; if the ambient temperature is greater than or equal to the first preset value, the first inlet and the second outlet of the first electric valve and the fifth outlet of the third electric valve are controlled to be opened, and the compressor is controlled to be started.

21. A control method of a refrigerator, wherein, The refrigerator comprises: a cabinet comprising a refrigerating chamber and a freezing chamber; a refrigeration system arranged in the cabinet, the refrigeration system comprising: a compressor; a condenser; a first evaporator capable of refrigerating the freezing chamber; a second evaporator capable of refrigerating the refrigerating chamber; a defrosting heating pipe arranged at the bottom of the first evaporator; a first electric valve; a second electric valve; a third electric valve; a first throttling device arranged between the third electric valve and the second evaporator; and a second throttling device arranged between the third electric valve and the condenser; The first outlet of the first electric valve is communicated with the third inlet of the third electric valve through the defrosting heating pipe, the fifth outlet of the third electric valve is communicated with the second evaporator through the first throtting device, and the sixth outlet of the third electric valve is communicated with the inlet of the condenser through the second throtting device; the outlet of the condenser is communicated with the second inlet of the second electric valve, the third outlet of the second electric valve is communicated with the first evaporator, and the fourth outlet of the second electric valve is communicated with the second evaporator; the outlet of the first evaporator and the outlet of the second evaporator are respectively communicated with the gas inlet of the compressor; The method comprises: In the case that it is detected that the refrigerator has a refrigeration demand, the ambient temperature of the environment where the refrigerator is located is acquired; According to the ambient temperature, the refrigerant participating amount in the refrigeration cycle in the refrigeration system is adjusted to a target content through the first electric valve, the second electric valve and the third electric valve; The fifth outlet and the sixth outlet of the third electric valve are controlled to be closed, the first outlet of the first electric valve is controlled to be opened, and at least one of the third outlet or the fourth outlet of the second electric valve is controlled to be opened; If it is determined that the ambient temperature is greater than or equal to a third preset value, the third outlet and the fourth outlet of the second electric valve are controlled to be closed, the second outlet of the first electric valve is controlled to be opened, and the target content is a first content; If it is determined that the ambient temperature is less than the third preset value, the first inlet, the first outlet and the second outlet of the first electric valve are controlled to be opened, the second inlet, the third outlet and the fourth outlet of the second electric valve are controlled to be opened, and the third inlet, the fifth outlet and the sixth outlet of the third electric valve are controlled to be opened, so that the target content is a second content.

22. A control method of a refrigerator, wherein, The refrigerator comprises: a cabinet comprising a refrigeration chamber and a freezing chamber; a refrigeration system arranged in the cabinet, the refrigeration system comprising: a compressor; a condenser; a first evaporator capable of refrigerating the freezing chamber; a second evaporator capable of refrigerating the refrigeration chamber; a defrosting heating pipe arranged at the bottom of the first evaporator; a first electric valve; a second electric valve; a third electric valve; a first throtting device arranged between the third electric valve and the second evaporator; and a second throtting device arranged between the third electric valve and the condenser; The outlet of the compressor is communicated with the first inlet of the first electric valve, the condenser is communicated with the first outlet of the first electric valve, the second outlet of the first electric valve is communicated with the third inlet of the third electric valve through the defrosting heating pipe, the fifth outlet of the third electric valve is communicated with the second evaporator through the first throtting device, the sixth outlet of the third electric valve is communicated with the inlet of the condenser through the second throtting device, the outlet of the condenser is communicated with the second inlet of the second electric valve, the third outlet of the second electric valve is communicated with the first evaporator, the fourth outlet of the second electric valve is communicated with the second evaporator, the outlet of the first evaporator and the outlet of the second evaporator are respectively communicated with the gas inlet of the compressor. The method comprises: When the refrigeration system is in the fast refrigeration mode, the compressor operates at a fifth rotating speed, the fourth outlet of the second electric valve is opened, the first outlet of the first electric valve is opened, the third inlet of the third electric valve is closed, and the fifth outlet and the sixth outlet of the third electric valve are opened.

23. A control method of a refrigerator, wherein, The refrigerator comprises: a cabinet comprising a refrigerating chamber and a freezing chamber; a refrigeration system arranged in the cabinet, the refrigeration system comprising: a compressor; a condenser; a first evaporator capable of refrigerating the freezing chamber; a second evaporator capable of refrigerating the refrigerating chamber; a defrosting heating pipe arranged at the bottom of the first evaporator; a first electric valve; a second electric valve; a third electric valve; a first throtting device arranged between the third electric valve and the second evaporator; and a second throtting device arranged between the third electric valve and the condenser; The outlet of the compressor is communicated with the first inlet of the first electric valve, the condenser is communicated with the first outlet of the first electric valve, the second outlet of the first electric valve is communicated with the third inlet of the third electric valve through the defrosting heating pipe, the fifth outlet of the third electric valve is communicated with the second evaporator through the first throtting device, the sixth outlet of the third electric valve is communicated with the inlet of the condenser through the second throtting device, the outlet of the condenser is communicated with the second inlet of the second electric valve, the third outlet of the second electric valve is communicated with the first evaporator, the fourth outlet of the second electric valve is communicated with the second evaporator, the outlet of the first evaporator and the outlet of the second evaporator are respectively communicated with the gas inlet of the compressor. The method comprises: When the refrigeration system exits the defrosting mode, the compressor is controlled to stop; the first electric valve is controlled to open the passage between the compressor and the condenser, and the outlet of the defrosting heating pipe is controlled to be closed through the third electric valve; the compressor is controlled to start, and the second electric valve is controlled to at least one of the following: open the passage between the condenser and the first evaporator, or open the passage between the condenser and the second evaporator; determining a time period in which the time point when the refrigerating system exits the defrosting mode is located, wherein the time period is a preset time period or a non-preset time period; if it is determined that the time period is the preset time period, controlling the third electric valve to open a passage between the defrosting heating pipe and the second evaporator; controlling the third electric valve to open a passage between the defrosting heating pipe and the second evaporator.

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