Refrigerator and control method thereof

Abstract

The invention discloses a refrigerator and a control method thereof, aiming at a multi-system refrigerator, after the refrigerator is started, when a fault of an electric control valve is detected, operation parameters of the refrigerator are adjusted according to a refrigeration state and a fault type, accurate isolation and system-level collaborative optimization of a multi-loop fault are realized through fine modeling parameter adjustment, and the system-level collaborative optimization of the multi-loop fault is realized. And further deterioration of faults can be relieved, and the intelligent degree of the refrigerator is improved.

Description

Technical Field

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

[0002] Among modern household refrigeration systems, multi-evaporator refrigerators are widely used due to their zoned temperature control advantages. These refrigerators typically use electrically controlled valves (such as electric valves and solenoid valves) to adjust the refrigerant flow, switching between different evaporators to meet the differentiated cooling needs of multiple storage compartments. However, existing technologies have significant shortcomings in handling electronically controlled valve failures. The core issue lies in the refrigerator's low level of intelligence. When an electric valve fails to switch, the existing control system lacks an adaptive adjustment mechanism, resulting in reduced temperature control accuracy in other normal temperature zones and even causing problems such as loss of food preservation. Summary of the Invention

[0003] The purpose of the embodiments of the present invention is to provide a refrigerator and a control method thereof, which achieves accurate isolation of multi-circuit faults and system-level collaborative optimization through fine-grained patterned parameter adjustment, can alleviate further deterioration of the faults, and improve the intelligence level of the refrigerator.

[0004] To achieve the above object, an embodiment of the present invention provides a refrigerator, comprising:

[0005] compressor;

[0006] The compressor outlet is connected to the condenser;

[0007] The condenser is connected to the inlet of the electric control valve;

[0008] The electrically controlled valve has a first outlet, a second outlet, and a third outlet; wherein the first outlet is connected to the inlet of the refrigeration capillary tube, the second outlet is connected to the inlet of the freezing capillary tube, and the third outlet is connected to the inlet of the temperature-variable capillary tube;

[0009] The outlet of the refrigeration capillary tube is connected to the inlet of the refrigeration evaporator, and the refrigeration evaporator is used to supply air and cold to the refrigeration chamber of the refrigerator;

[0010] The outlet of the freezing capillary tube is connected to the inlet of the freezing evaporator, and the freezing evaporator is used to supply air and cold to the freezing chamber of the refrigerator through a freezing fan;

[0011] The outlet of the temperature-variable capillary tube is connected to the inlet of the temperature-variable evaporator, and the temperature-variable evaporator is used to supply air and cooling to the temperature-variable chamber of the refrigerator;

[0012] A controller configured to:

[0013] When the electric control valve moves to the first outlet, so that the first outlet is in an open state and the electric control valve cannot be switched to other states, obtaining the freezing temperature of the freezing chamber;

[0014] When the freezing chamber needs to be refrigerated, the defrosting function of the refrigerating chamber is not started when the refrigerating chamber reaches the defrosting condition;

[0015] When the refrigeration chamber needs to be refrigerated, the refrigeration fan is turned on when the freezing temperature is greater than the set temperature, and the refrigeration fan is turned off when the freezing temperature is less than or equal to the set temperature;

[0016] When the variable temperature room needs to be cooled, the compressor is controlled to stop.

[0017] The above technical solution has the following advantages or beneficial effects: Through precise, patterned parameter adjustment, it achieves precise isolation of multi-circuit faults and system-level collaborative optimization, mitigating further deterioration of faults and improving the refrigerator's intelligence. When the electronically controlled valve switches to the refrigeration path and becomes inoperable, intelligent control of the fan, defrost, and compressor achieves precise cooling capacity distribution and energy optimization for each compartment. This prevents interference from faults and ensures that, after an electronically controlled valve failure, each compartment can adjust operating parameters to reduce equipment burden and maintain cooling efficiency for a short period of time.

[0018] In some embodiments of the present application, the controller is further configured to:

[0019] When the electric control valve moves to the second outlet, so that the second outlet is in an open state and the electric control valve cannot be switched to other states, after the freezer finishes refrigeration, the compressor is controlled to stop, the refrigerator compartment is controlled to stop blowing air for defrosting, and the variable temperature room is controlled to stop defrosting and heating.

[0020] The above technical solution has the following advantages or beneficial effects: when the electric control valve switches to the freezing and refrigeration path and cannot operate, the compressor is promptly controlled to stop and non-essential functions are turned off to reduce the waste of cold air; at the same time, the defrosting heating is blocked to maintain the temperature of the refrigeration and variable temperature chambers stable, which not only reduces energy consumption but also ensures the safety of food storage.

[0021] In some embodiments of the present application, the controller is further configured to:

[0022] When the electric control valve moves to the third outlet, so that the third outlet is in an open state and the electric control valve cannot be switched to other states, obtaining the freezing temperature of the freezing chamber;

[0023] When the freezing chamber needs to be refrigerated, the defrosting of the variable temperature chamber is not started when the variable temperature chamber reaches the defrosting condition;

[0024] When the refrigeration chamber needs to be refrigerated, controlling the compressor to stop;

[0025] When the variable temperature room needs to be refrigerated, the refrigeration fan is turned on when the freezing temperature is greater than the set temperature, and the refrigeration fan is turned off when the freezing temperature is less than or equal to the set temperature.

[0026] The above technical solution has the following advantages or beneficial effects: when the electric control valve switches to the variable temperature refrigeration path and cannot operate, it not only ensures the refrigeration effect of each compartment, but also optimizes energy utilization, thereby improving the overall operating stability and energy efficiency of the refrigerator in a fault state.

[0027] To achieve the above object, an embodiment of the present invention provides another refrigerator, comprising:

[0028] compressor;

[0029] The compressor outlet is connected to the condenser;

[0030] The condenser is connected to the inlet of the electric control valve;

[0031] The electrically controlled valve has a first outlet and a second outlet; wherein the first outlet is connected to the inlet of the refrigeration capillary tube, and the second outlet is connected to the inlet of the freezing capillary tube;

[0032] The outlet of the refrigeration capillary tube is connected to the inlet of the refrigeration evaporator, and the refrigeration evaporator is used to supply air and cooling to the refrigeration chamber of the refrigerator through the refrigeration damper and the refrigeration fan;

[0033] The outlet of the freezing capillary tube is connected to the inlet of the freezing evaporator, and the freezing evaporator is used to supply air and cold to the freezing chamber of the refrigerator through a freezing fan;

[0034] A controller configured to:

[0035] When the electric control valve moves to the first outlet, so that the first outlet is in an open state and the electric control valve cannot be switched to other states, obtaining the freezing temperature of the freezing chamber;

[0036] When the freezing chamber needs to be refrigerated, the refrigeration damper and the refrigeration fan are closed;

[0037] When the refrigeration chamber needs to be refrigerated, the refrigeration fan is turned on when the freezing temperature is greater than the defrosting temperature, and the refrigeration fan is turned off when the freezing temperature is less than or equal to the defrosting temperature.

[0038] The above technical solution has the following advantages or beneficial effects: Through precise, patterned parameter adjustment, it achieves precise isolation of multi-circuit faults and system-level coordinated optimization, mitigating further fault deterioration and improving the refrigerator's intelligence. When the electronically controlled valve switches to the refrigeration path and becomes inoperable, intelligent control of the fan and damper achieves precise cooling capacity distribution and energy optimization across compartments. This prevents interference from faults and ensures that, after an electronically controlled valve failure, each compartment can adjust operating parameters to reduce equipment burden and maintain cooling efficiency for a short period of time.

[0039] In some embodiments of the present application, the controller is further configured to:

[0040] When the electric control valve moves to the second outlet, so that the second outlet is in an open state and the electric control valve cannot be switched to other states, the compressor is controlled to stop after the freezing chamber finishes refrigeration.

[0041] The above technical solution has the following advantages or beneficial effects: when the electric control valve switches to the freezing and refrigeration path and cannot operate, the compressor is promptly controlled to stop, thereby reducing the waste of cooling capacity.

[0042] To achieve the above-mentioned object, an embodiment of the present invention provides a refrigerator control method, wherein the refrigerator is provided with an electric control valve, the electric control valve having a first outlet, a second outlet, and a third outlet; wherein the first outlet is connected to the inlet of a refrigeration capillary tube, the second outlet is connected to the inlet of a freezing capillary tube, and the third outlet is connected to the inlet of a temperature-variable capillary tube; the outlet of the refrigeration capillary tube is connected to the inlet of a refrigeration evaporator, and the refrigeration evaporator is used to supply air and cool the refrigeration chamber of the refrigerator; the outlet of the freezing capillary tube is connected to the inlet of a freezing evaporator, and the freezing evaporator is used to supply air and cool the freezer chamber of the refrigerator through a refrigeration fan; the outlet of the temperature-variable capillary tube is connected to the inlet of the temperature-variable evaporator, and the temperature-variable evaporator is used to supply air and cool the variable temperature chamber of the refrigerator; the method comprises:

[0043] When the electric control valve moves to the first outlet, so that the first outlet is in an open state and the electric control valve cannot be switched to other states, obtaining the freezing temperature of the freezing chamber;

[0044] When the freezing chamber needs to be refrigerated, the defrosting function of the refrigerating chamber is not started when the refrigerating chamber reaches the defrosting condition;

[0045] When the refrigeration chamber needs to be refrigerated, the refrigeration fan is turned on when the freezing temperature is greater than the set temperature, and the refrigeration fan is turned off when the freezing temperature is less than or equal to the set temperature;

[0046] When the variable temperature room needs to be cooled, the compressor is controlled to stop.

[0047] The above technical solution has the following advantages and benefits: When the electronically controlled valve switches to the refrigeration path and becomes inoperative, intelligent control of the fan, defrost, and compressor achieves precise cooling capacity distribution and optimized energy consumption across all rooms. This avoids interference caused by faults and ensures that after an electronically controlled valve failure, the operating parameters of each room are adjusted to reduce the equipment burden and maintain cooling efficiency within a short period of time.

[0048] In some embodiments of the present application, the method further comprises:

[0049] When the electric control valve moves to the second outlet, so that the second outlet is in an open state and the electric control valve cannot be switched to other states, after the freezer finishes refrigeration, the compressor is controlled to stop, the refrigerator compartment is controlled to stop blowing air for defrosting, and the variable temperature room is controlled to stop defrosting and heating.

[0050] The above technical solution has the following advantages or beneficial effects: when the electric control valve switches to the freezing and refrigeration path and cannot operate, the compressor is promptly controlled to stop and non-essential functions are turned off to reduce the waste of cold air; at the same time, the defrosting heating is blocked to maintain the temperature of the refrigeration and variable temperature chambers stable, which not only reduces energy consumption but also ensures the safety of food storage.

[0051] In some embodiments of the present application, the method further comprises:

[0052] When the electric control valve moves to the third outlet, so that the third outlet is in an open state and the electric control valve cannot be switched to other states, obtaining the freezing temperature of the freezing chamber;

[0053] When the freezing chamber needs to be refrigerated, the defrosting of the variable temperature chamber is not started when the variable temperature chamber reaches the defrosting condition;

[0054] When the refrigeration chamber needs to be refrigerated, controlling the compressor to stop;

[0055] When the variable temperature room needs to be refrigerated, the refrigeration fan is turned on when the freezing temperature is greater than the set temperature, and the refrigeration fan is turned off when the freezing temperature is less than or equal to the set temperature.

[0056] The above technical solution has the following advantages or beneficial effects: when the electric control valve switches to the variable temperature refrigeration path and cannot operate, it not only ensures the refrigeration effect of each compartment, but also optimizes energy utilization, thereby improving the overall operating stability and energy efficiency of the refrigerator in a fault state.

[0057] To achieve the above-mentioned object, an embodiment of the present invention provides a refrigerator control method, wherein the refrigerator is provided with an electrically controlled valve, the electrically controlled valve having a first outlet and a second outlet; wherein the first outlet is connected to the inlet of a refrigerating capillary tube, and the second outlet is connected to the inlet of a freezing capillary tube; the outlet of the refrigerating capillary tube is connected to the inlet of a refrigerating evaporator, and the refrigerating evaporator is used to supply air and cooling to the refrigerating chamber of the refrigerator through a refrigerating damper and a refrigerating fan; the outlet of the freezing capillary tube is connected to the inlet of a freezing evaporator, and the freezing evaporator is used to supply air and cooling to the freezing chamber of the refrigerator through a freezing fan; the method comprises:

[0058] When the electric control valve moves to the first outlet, so that the first outlet is in an open state and the electric control valve cannot be switched to other states, obtaining the freezing temperature of the freezing chamber;

[0059] When the freezing chamber needs to be refrigerated, the refrigeration damper and the refrigeration fan are closed;

[0060] When the refrigeration chamber needs to be refrigerated, the refrigeration fan is turned on when the freezing temperature is greater than the defrosting temperature, and the refrigeration fan is turned off when the freezing temperature is less than or equal to the defrosting temperature.

[0061] The above technical solution has the following advantages and benefits: When the electronically controlled valve switches to the refrigeration path and becomes inoperative, intelligent control of the fan and damper achieves precise cooling capacity distribution and optimizes energy consumption across all rooms. This avoids interruptions caused by faults and ensures that, after an electronically controlled valve failure, each room can adjust operating parameters to reduce equipment burden and maintain cooling efficiency for a short period of time.

[0062] In some embodiments of the present application, the method further comprises:

[0063] When the electric control valve moves to the second outlet, so that the second outlet is in an open state and the electric control valve cannot be switched to other states, the compressor is controlled to stop after the freezing chamber finishes refrigeration.

[0064] The above technical solution has the following advantages or beneficial effects: when the electric control valve switches to the freezing and refrigeration path and cannot operate, the compressor is promptly controlled to stop, thereby reducing the waste of cooling capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0065] Figure 1 1 is a schematic diagram of the external structure of a refrigerator provided by an embodiment of the present invention;

[0066] Figure 2 This is a schematic diagram of the internal structure of a refrigerator provided by an embodiment of the present invention;

[0067] Figure 3 1 is a schematic structural diagram of a refrigeration system in a three-system refrigerator provided by an embodiment of the present invention;

[0068] Figure 4 This is a flow chart of the operation of the electric control valve in the three-system refrigerator provided by an embodiment of the present invention;

[0069] Figure 5 Schematic diagram of the refrigerant flow direction when an electric control valve fails on the refrigeration side in a three-system refrigerator provided by an embodiment of the present invention;

[0070] Figure 6 Schematic diagram of the refrigerant flow direction when a switching failure occurs on the temperature-changing side of the electric control valve in a three-system refrigerator provided by an embodiment of the present invention;

[0071] Figure 7 Schematic diagram of the refrigerant flow direction when a switching failure occurs on the freezing side of the electric control valve in a three-system refrigerator provided by an embodiment of the present invention;

[0072] Figure 8 1 is a schematic structural diagram of a refrigeration system in a dual-system refrigerator provided by an embodiment of the present invention;

[0073] Figure 9 Schematic diagram of the refrigerant flow direction when a switching failure occurs on the refrigeration side of the electric control valve in a dual-system refrigerator provided by an embodiment of the present invention;

[0074] Figure 10 Schematic diagram of the refrigerant flow direction when a switching failure occurs on the freezing side of the electric control valve in a dual-system refrigerator provided by an embodiment of the present invention;

[0075] Figure 11 This is a first working flow diagram of a controller in a refrigerator provided by an embodiment of the present invention;

[0076] Figure 12 is a second working flow diagram of the controller in the refrigerator provided by an embodiment of the present invention;

[0077] Figure 13 is a third working flow diagram of the controller in the refrigerator provided by an embodiment of the present invention;

[0078] Figure 14 is a fourth working flow diagram of the controller in the refrigerator provided by an embodiment of the present invention;

[0079] Figure 15 is a flow chart of a refrigerator control method provided by an embodiment of the present invention;

[0080] Figure 16 This is a flow chart of another refrigerator control method provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0081] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0082] In the description of this application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and 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, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on this application.

[0083] 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 the technical features being referred to. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0084] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, removable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0085] See also Figure 1 , Figure 1 The figure below is a schematic diagram of the external structure of a refrigerator 100 provided in an embodiment of the present invention. The refrigerator 100 of this embodiment is approximately rectangular in shape and includes a housing defining a storage space and one or more doors located at the housing opening. The door comprises an outer door shell located on the outside of the housing, an inner door liner located on the inside of the housing, an upper end cover, a lower end cover, and an insulating layer located between the outer door shell, the inner door liner, the upper end cover, and the lower end cover. Typically, the insulating layer is filled with foam. The housing is provided with a chamber, which includes a component storage cavity for placing refrigerator components, such as a compressor compartment, and a storage space for storing food, etc.

[0086] See also Figure 2 , Figure 2This is a schematic diagram of the internal structure of a refrigerator provided by an embodiment of the present invention. The storage space can be divided into multiple storage rooms. The storage rooms can be configured as refrigerators and freezers according to different uses. They can also include variable temperature rooms, vacuum drawers, moisturizing drawers, etc. Each storage room corresponds to one or more doors, such as Figure 2 The storage room in the middle and upper part is provided with a double-door body. The door body can be pivotally arranged at the opening of the box body, and can also be opened in a drawer-like manner to realize drawer-like storage.

[0087] It should be noted that the refrigerator described in the embodiments of the present invention can be a dual-system refrigerator or a triple-system refrigerator. The refrigerator's refrigeration system is used to provide cooling for the refrigerator, and the refrigeration system includes a compressor, a condenser, and at least two evaporators connected by pipes. The embodiments of the present invention also provide an electrically controlled valve (such as an electric valve or a solenoid valve) provided in the refrigeration system for regulating the flow of refrigerant in the refrigeration system so that the refrigerant flows through the corresponding evaporator.

[0088] See also Figure 3 , Figure 3 This is a structural schematic diagram of the refrigeration system in a three-system refrigerator provided by an embodiment of the present invention. A three-system refrigerator is a refrigerator design with three independent refrigeration systems. Each system is usually responsible for a different temperature zone or functional area, such as a refrigerator compartment, a freezer compartment, and a variable temperature evaporator. The three-system refrigerator includes three evaporators, namely a refrigeration evaporator, a variable temperature evaporator, and a freezing evaporator. These three evaporators are connected in series with their corresponding capillaries and then uniformly connected to an electric control valve. The three-system refrigerator includes: a compressor; the compressor outlet is connected to a condenser; the condenser is connected to the inlet of an electric control valve; the electric control valve has a first outlet, a second outlet and a third outlet; wherein, the first outlet is connected to the inlet of a refrigeration capillary tube, the second outlet is connected to the inlet of a freezing capillary tube, and the third outlet is connected to the inlet of a variable temperature capillary tube; the outlet of the refrigeration capillary tube is connected to the inlet of a refrigeration evaporator, and the refrigeration evaporator is used to supply air and cooling to the refrigerator compartment of the refrigerator; the outlet of the freezing capillary tube is connected to the inlet of a freezing evaporator, and the freezing evaporator is used to supply air and cooling to the freezer compartment of the refrigerator through a refrigeration fan; the outlet of the variable temperature capillary tube is connected to the inlet of a variable temperature evaporator, and the variable temperature evaporator is used to supply air and cooling to the variable temperature compartment of the refrigerator.

[0089] In a three-system refrigerator, electronically controlled valves (such as electric valves) play a crucial role in managing the flow of refrigerant through the various refrigeration circuits, ensuring that each independent refrigeration system can effectively regulate the temperature of its designated temperature zone. This precise control helps improve the refrigerator's energy efficiency and preserve food freshness. When the electronically controlled valves are functioning properly, they respond to the cooling needs of each compartment, allowing refrigerant to flow through each evaporator and achieve temperature reduction. A three-system refrigerator has three independent refrigeration circuits, each of which can independently control a different compartment. For example, if there is a cooling demand in the refrigerator compartment, the electronically controlled valve switches to the refrigeration circuit; if there is a cooling demand in the variable temperature chamber, the electronically controlled valve switches to the variable temperature circuit; and if there is a cooling demand in the freezer compartment, the electronically controlled valve switches to the freezing circuit. If there is no cooling demand, the electronically controlled valve will also switch to the lower temperature circuit based on the R&D design, generally designed to be used as needed.

[0090] See also Figure 4 , Figure 4 This is a flowchart of the operation of the electric control valve in the three-system refrigerator provided by an embodiment of the present invention. In this case, the electric control valve is designed with three outlet switches: OUT1, OUT2, and OUT3. The electric control valve is driven by an electrical signal to rotate to the corresponding compartment position to adjust the flow direction of the refrigerant. Generally, the electric control valve consists of an electromagnetic coil and a movable valve core. When the electromagnetic coil is energized, the magnetic field generated will push or pull the valve core, thereby changing the state of the valve. The electric control valve operates according to the three outlet pipe switches according to the refrigeration requirements: when the refrigeration requires refrigeration, the electric control valve outlet pipe switch switches to OUT1 to supply refrigerant to the refrigeration chamber; when the temperature changes and defrosting and heating are stopped, the electric control valve outlet pipe switch switches to OUT2 to control the refrigerant flow direction related to the refrigerator compartment; when the refrigeration fan is turned off, the electric control valve outlet pipe switch switches to OUT3 to cooperate with the specific operating state of the freezer compartment (such as reducing the cooling output or entering energy-saving mode).

[0091] It should be noted that when an electronically controlled valve malfunctions, there's currently no feedback signal. While the refrigerator can operate it, it's unaware of its function. Electronically controlled valves typically experience the following faults: electrical system failures, such as power supply or control circuit anomalies, resulting in unresponsive or delayed operation; mechanical component failures, such as blockage by foreign matter or lubricant depletion, which can cause the valve core to become stuck and unable to operate; or other reasons, such as freezing, that can render the electronically controlled valve inoperable. This ultimately results in the inability to properly distribute cooling capacity and prevent cooling from proceeding according to the pre-set software logic. Fault types can be categorized as follows: The electronically controlled valve fails to switch to the refrigeration side (refrigeration side switching fault); the electronically controlled valve fails to switch to the freezer side (freezer side switching fault); and the electronically controlled valve fails to switch to the variable temperature side (variable temperature side switching fault).

[0092] See also Figure 5 , Figure 5 This is a schematic diagram of the flow of refrigerant when the electronically controlled valve in the three-system refrigerator provided by an embodiment of the present invention switches on the refrigeration side. The electronically controlled valve moves to the first outlet, so that the first outlet is in an open state and the electronically controlled valve cannot be switched to other states. At this time, the refrigerant can only circulate in the refrigeration system according to the flow direction shown by the solid line. Since the electronically controlled valve can only be on the refrigeration side, the freezer or the variable temperature chamber may not reach the set temperature or the temperature may show abnormalities. The present invention has simulated the failure in advance and arbitrarily set the temperature of each compartment to simulate the situation when the electronically controlled valve can only be on the refrigeration side. The conclusion is: the temperature of the variable temperature chamber gradually rises, and the refrigeration chamber will be below 0°C. Since the refrigeration logic of the three systems also flows through the freezer, the temperature of the freezer will also change significantly. However, the current temperature change data varies with the set temperature and the ambient temperature.

[0093] See also Figure 6 , Figure 6 This is a schematic diagram of the flow direction of the refrigerant when the electric control valve in the three-system refrigerator provided by an embodiment of the present invention fails to switch on the temperature-changing side. The electric control valve moves to the third outlet, so that the third outlet is in an open state and the electric control valve cannot be switched to other states. At this time, the refrigerant can only circulate in the refrigeration system in the direction shown by the solid line. If the electric control valve fails to move when switching on the temperature-changing side, the simulated fault conclusion is similar to when a failure occurs on the refrigeration side, and both can only flow through the current evaporator and the freezing evaporator, which will not be repeated here.

[0094] See also Figure 7 , Figure 7 This is a schematic diagram of the flow of refrigerant when the electric control valve in the three-system refrigerator provided by an embodiment of the present invention switches on the freezing side. The electric control valve moves to the second outlet, so that the second outlet is in an open state and the electric control valve cannot be switched to other states. At this time, the refrigerant can only circulate in the refrigeration system according to the flow direction shown by the solid line. Since the electric control valve can only be on the freezing side, the cold storage room or the variable temperature room may not be able to be refrigerated. Even if the temperature of the freezer reaches the set temperature and stops refrigeration, the freezer will be overcooled. The present invention has simulated the fault in advance, set the temperature of each compartment, and simulated the situation when the electric control valve can only be on the freezing side. The conclusion is: the temperature of the variable temperature room and the cold storage room has increased to varying degrees, while the temperature of the freezer will continue to decrease. Similarly, the current temperature change situation, with the difference in the set temperature and the ambient temperature, the data performance is different.

[0095] The above is a description of the refrigerant flow direction of a three-system refrigerator when the electric control valve is in different fault types and the operating performance of the refrigerator after the fault. An embodiment of the present invention also provides a dual-system refrigerator, and the corresponding description of the refrigerant flow direction of the electric control valve when it is in different fault types and the operating performance of the refrigerator after the fault are described below.

[0096] See also Figure 8 , Figure 8 This is a schematic diagram of the refrigeration system in a dual-system refrigerator provided by an embodiment of the present invention. The dual-system refrigerator features independent dual-circuit systems, with separate evaporators for the refrigerator and freezer compartments. An electrically controlled valve (such as a solenoid valve) is used to switch the refrigerant flow path, enabling independent control of the refrigeration cycles in the refrigerator and freezer compartments. The dual-system refrigerator includes: a compressor; the compressor outlet is connected to a condenser; the condenser is connected to the inlet of an electrically controlled valve; the electrically controlled valve has a first outlet and a second outlet; the first outlet is connected to the inlet of a refrigeration capillary tube, and the second outlet is connected to the inlet of a freezing capillary tube; the outlet of the refrigeration capillary tube is connected to the inlet of a refrigeration evaporator, which is used to supply air to the refrigerator compartment via a refrigeration damper and a refrigeration fan; the outlet of the freezing capillary tube is connected to the inlet of a freezing evaporator, which is used to supply air to the refrigerator compartment via a refrigeration fan. When the electrically controlled valve is functioning properly, it responds to the cooling needs of different compartments, allowing refrigerant to flow through each evaporator to achieve temperature reduction. When the electric control valve fails, the failure type can be divided into the following two types: the electric control valve cannot switch on the refrigeration side (i.e., refrigeration side switching failure), and the electric control valve cannot switch on the freezing side (i.e., freezing side switching failure).

[0097] See also Figure 9 , Figure 9 This is a schematic diagram of the flow of refrigerant in a dual-system refrigerator provided by an embodiment of the present invention when the electronically controlled valve fails to switch on the refrigeration side. The electronically controlled valve moves to the first outlet, so that the first outlet is in an open state and the electronically controlled valve cannot be switched to other states. The refrigerant can only circulate inside the refrigerator in the direction shown by the solid line. When the refrigerator compartment needs to be cooled, the refrigerant circulates in a normal manner, but when the freezer compartment needs to be cooled, the refrigerant still flows through the refrigeration capillary, which will cause the temperature of the refrigerator compartment to be too low and the temperature of the freezer compartment to rise.

[0098] See also Figure 10 , Figure 10 This is a schematic diagram of the flow of refrigerant in a dual-system refrigerator provided by an embodiment of the present invention when the electronically controlled valve fails to switch on the freezing side. The electronically controlled valve moves to the second outlet, so that the second outlet is in an open state and the electronically controlled valve cannot be switched to other states. The refrigerant can only circulate inside the refrigerator in the direction shown by the solid line. Since the electronically controlled valve can only be on the freezing side, the refrigerator compartment will not be able to be refrigerated. Even if the temperature of the freezer compartment reaches the set temperature and refrigeration stops, the freezer compartment will still be overcooled.

[0099] Based on the above-mentioned several situations when the electric control valve of the three-system refrigerator and the dual-system refrigerator fails, the present invention designs a fault diagnosis method for the electric control valve and a system maintenance method after the failure. Without increasing the hardware cost, the intelligent fault diagnosis of the electric control valve can be realized, and after the fault type is diagnosed, intelligent operation measures are taken. Although the hardware failure cannot be solved, the deterioration of the fault can be alleviated to a certain extent.

[0100] Specifically, the controller in the refrigerator is configured to: obtain n pieces of operating data of the refrigerator, where n≥1 and n is an integer; input the n pieces of operating data into a pre-trained fault diagnosis model so that the fault diagnosis model outputs a diagnosis result of the electric control valve; wherein the diagnosis result includes a normal operating state and an abnormal operating state, and the abnormal operating state indicates the fault type of the electric control valve when switching to the refrigeration circuit of the corresponding evaporator.

[0101] For example, see Figure 11 , Figure 11 This is a first workflow diagram of a controller in a refrigerator provided by an embodiment of the present invention. The controller is configured to execute steps S11 to S13. During normal operation of the refrigerator, the controller collects status data reported by the refrigerator, including temperature data from each compartment, data reported by each sensor, fan speed, and compressor status. The received data is preprocessed, parsed, and normalized, and then stored in a large data set. The large data set stores the data reported by the refrigerator. Because the fault diagnosis model needs to analyze data over a period of time and analyze data changes, it determines whether the amount of stored data is n (where n is the minimum amount of data required for a single diagnosis). If the amount of data is less than n, data collection and storage continues. When the number of data reaches n, the fault diagnosis model is invoked for diagnosis. If new data is collected, the data is saved, the first data item in the storage area is deleted, and the fault diagnosis model is invoked for a new diagnosis. This sliding window data selection method ensures a good diagnostic result even with a small amount of data.

[0102] It should be noted that due to the different hardware structures of the refrigeration systems of three-system refrigerators and dual-system refrigerators, the collected refrigerator operating data differs slightly. For example, a three-system refrigerator with a variable temperature chamber requires collecting temperature sensor data from the variable temperature chamber, while a dual-system refrigerator without a variable temperature chamber does not require this data. The specific operating data required for three-system and dual-system refrigerators can be collected based on the actual refrigerator hardware structure. This disclosure is merely an example and does not limit detailed operating data. Furthermore, the fault diagnosis models used by three-system and dual-system refrigerators differ, as does the training process.

[0103] In this embodiment of the present invention, by collecting n pieces of operating data, the limitations of traditional single-sensor threshold judgment are overcome, significantly improving fault identification accuracy. The fault diagnosis model, trained on historical data, can learn normal operating patterns under different ambient temperatures and load conditions and automatically adjust diagnostic thresholds. By continuously monitoring subtle changes in operating data, fault handling is shifted from "reactive repair" to "proactive maintenance," reducing the risk of unplanned downtime. This offers significant advantages in improving product reliability, reducing operating costs, and enhancing the user experience.

[0104] Specifically, the training data input into the fault diagnosis model during the training phase include: multiple groups of operating parameters corresponding to the simulated electronically controlled valve in normal operating state and abnormal operating state respectively.

[0105] Exemplarily, the premise for using the present invention is that sufficient data collection is required. Several types of faults of the electric control valve are simulated in the laboratory. By setting different temperatures and changing the ambient temperature conditions, a large amount of laboratory data is collected. Normal data and fault data are classified through data analysis. A model is first designed for self-training, and the model file learned and inferred can be used directly. In this way, a more accurate diagnosis result can be given for the data changes reported by refrigerators with the same related faults.

[0106] Furthermore, for the fault diagnosis model of a three-system refrigerator (the training process of the fault diagnosis model of a two-system refrigerator is similar and will not be repeated here), the embodiment of the present invention provides the following training examples:

[0107] 1) Determine the characteristic parameters of the training data, such as compressor speed, condenser temperature, refrigeration evaporator temperature, variable temperature evaporator temperature, freezing evaporator temperature, electric control valve drive signal (voltage value, reflecting whether the valve receives the switching instruction), and the fan speed of each compartment (such as refrigeration fan, variable temperature fan, and freezing fan).

[0108] 2) Simulating training data for normal operating conditions: When the three refrigerator systems are operating normally, data under different refrigeration conditions are collected and labeled as "normal operating conditions" to form training data samples.

[0109] 3) Training data simulating abnormal operating conditions, simulating three types of faults: refrigeration side switching fault, variable temperature side switching fault, and freezing side switching fault. Similarly, data under different refrigeration conditions are collected and the above abnormal state data are marked as "abnormal operating state" to form training data samples.

[0110] 4) Model training process: Multiple sets of data in normal and abnormal states (each set of data contains all characteristic parameters) are input into a fault diagnosis model (such as a neural network, random forest, etc.). A supervised learning method is used, with the labeled diagnostic results (normal operating state / specific fault type) as labels, to allow the model to learn the characteristic patterns of parameters under different states; the model parameters (such as the weights of the neural network) are continuously adjusted to gradually improve the diagnostic accuracy of the model on the training data (such as through optimization of the cross-entropy loss function); when the accuracy of the model on the validation set reaches a set threshold (such as 95%), the model training is considered complete, and the fault diagnosis model can be used for actual refrigerator electric control valve fault diagnosis.

[0111] In an embodiment of the present invention, the machine simulates the operating parameters of the electric control valve under different abnormal conditions, so that the model learns the characteristic patterns of various faults. The simulated training data covers the fault characteristics under different working conditions, so that the model can adapt to complex and changeable operating scenarios in actual applications.

[0112] Specifically, the controller is also configured to: when the diagnosis result is an abnormal operating state, reset the electric control valve; obtain reset data of the refrigerator after a period of time after performing the reset action; when the reset data does not meet the preset reset parameter conditions, obtain the current refrigeration state of the refrigerator; and adjust the operating parameters of the refrigerator according to the refrigeration state and the fault type.

[0113] It should be noted that the fault diagnosis model generates a diagnosis result. If the diagnosis result is normal, the refrigerator will continue to operate normally and continue fault diagnosis. If the diagnosis is a fault with the electronically controlled valve, a terminal reminder will be sent to the user, who can report the problem promptly. This information will also be sent to the after-sales service system, allowing after-sales service to perform proactive maintenance to prevent the user from ignoring the problem. At the same time, the refrigerator will enter an intelligent operating state to minimize further deterioration of the refrigerator.

[0114] For example, see Figure 12 , Figure 12This is the second working flow diagram of the controller in the refrigerator provided by the embodiment of the present invention. First, when an abnormality of the electric control valve is detected, a reset action (such as power off and restart, multiple pulse drive) is tried first to solve occasional faults caused by transient interference (such as voltage fluctuations, foreign objects stuck). The reset parameter condition is the key basis for judging whether the reset action of the electric control valve has successfully restored normal operation. It is usually related to parameters such as temperature, pressure, and operating status of the refrigerator refrigeration system. The present invention provides an example of a reset parameter condition. The reset parameter condition can meet at least one of the following conditions: ① After the reset action is completed, within a preset time (such as 5-10 minutes), the corresponding evaporator temperature should drop below a specific threshold; ② The high and low pressure side pressures of the refrigeration system must be within the normal range; ③ The operating current of the compressor should be within the rated current range; ④ The evaporator temperature change rate must comply with the normal refrigeration rate; ⑤ The damper opening and fan operating status of the corresponding area of ​​the evaporator should match the refrigeration state. When the reset data does not meet one or more of the above reset parameter conditions, the current refrigeration state of the refrigerator is obtained, and the intelligent operation state is entered, and the operating parameters of the refrigerator are adjusted according to the refrigeration state and the fault type.

[0115] In this embodiment of the present invention, when an electronically controlled valve fails, the refrigerator enters intelligent operation to maximize cooling performance. However, since electronically controlled valve failures are hardware failures, they are irreversible once they occur. The only option is to minimize further malfunction. If no action is taken after a failure occurs, the food inside the refrigerator may spoil. Adaptive adjustments maintain operation, avoiding frequent repair requests. If it is determined that the electronically controlled valve cannot be reset, scenario-based intelligent decision-making adjusts operating parameters to reduce equipment burden and ensure cooling performance. This closed-loop control of the electronically controlled valve, which involves "reset attempt → effect evaluation → scenario-based adjustment," achieves a transition from passive shutdown to active maintenance. This significantly reduces equipment operation and maintenance costs while ensuring a superior user experience, embodying the development trend of smart home appliances characterized by self-adaptation, self-repair, and self-evolution.

[0116] Specifically, when the refrigerator is a dual-system refrigerator, the refrigeration state includes refrigeration refrigeration and freezing refrigeration, and the fault type includes refrigeration side switching fault and freezing side switching fault; when the refrigerator is a three-system refrigerator, the refrigeration state includes refrigeration refrigeration, variable temperature refrigeration and freezing refrigeration, and the fault type includes refrigeration side switching fault, variable temperature side switching fault and freezing side switching fault.

[0117] In this embodiment, faults in the refrigeration circuits of dual- and triple-system refrigerators are precisely located, enabling optimization of the overall control strategy by analyzing the correlation between faults in different systems. Furthermore, by deeply integrating fault diagnosis with a multi-system architecture, the reliability and user experience of multi-evaporator refrigerators in complex scenarios are significantly improved, providing core support for the intelligent development of high-end refrigerators.

[0118] For example, see Figure 13 , Figure 13 This is a third working flow diagram of the controller in the refrigerator provided by an embodiment of the present invention. When it is determined that the electronically controlled valve has failed and cannot be reset, the operating parameters of the refrigerator are adjusted according to the refrigeration state and the type of failure. In this case, there are the following three situations:

[0119] Case 1: When the electric control valve moves to the first outlet, so that the first outlet is in the open state and the electric control valve cannot be switched to other states, the freezing temperature of the freezer compartment is obtained; when the freezer compartment needs to be refrigerated, the defrosting of the refrigeration compartment is not started when the refrigeration compartment reaches the defrosting condition; when the refrigeration compartment needs to be refrigerated, the refrigeration fan is turned on when the freezing temperature is greater than the set temperature, and the refrigeration fan is turned off when the freezing temperature is less than or equal to the set temperature; when the variable temperature room needs to be refrigerated, the compressor is controlled to stop. At this time, when the electric control valve switches to the refrigeration side and cannot be restored (that is, the refrigeration side switching failure), combined with Figure 5 The refrigerant flow direction shown in the figure is that the refrigerant only flows through the refrigeration evaporator and the freezing evaporator, and performs the following actions on the refrigerator:

[0120] 1.1) When using variable temperature cooling, stop the compressor and defrost heating. Since the variable temperature chamber cannot be cooled, try to reduce the speed at which the temperature of the variable temperature chamber rises.

[0121] 1.2) During freezing and refrigeration, the refrigerator compartment stops blowing air to defrost. When the refrigerator compartment is defrosted, the refrigerant flows through the refrigeration side, the temperature of the refrigeration evaporator is very low, and the refrigerator compartment may reach below zero, causing the refrigerator room temperature to be too low and the food to be frozen. Therefore, stopping the defrost in the refrigerator compartment can reduce this impact on the refrigerator compartment.

[0122] 1.3) During refrigeration, the refrigerant flows through both the refrigerator and freezer evaporators, causing the freezer evaporator to reach a relatively low temperature. Therefore, the freezer fan operation can be adjusted based on the actual freezer temperature. If the freezer temperature is higher than the set point, indicating that the freezer has not yet reached the set point and needs to be cooled further, the freezer fan is turned on; otherwise, the freezer fan is turned off.

[0123] Case 2: When the electric control valve moves to the third outlet, so that the third outlet is in the open state and the electric control valve cannot be switched to other states, the freezing temperature of the freezer compartment is obtained; when the freezer compartment needs to be refrigerated, the defrosting of the variable temperature compartment is not started when the variable temperature compartment reaches the defrosting condition; when the refrigeration compartment needs to be refrigerated, the compressor is controlled to stop; when the variable temperature compartment needs to be refrigerated, the refrigeration fan is turned on when the freezing temperature is greater than the set temperature, and the refrigeration fan is turned off when the freezing temperature is less than or equal to the set temperature. At this time, when the electric control valve switches to the variable temperature side and cannot be restored (i.e., the variable temperature side switching failure), combined with Figure 6 The refrigerant flow direction shown in the figure is that the refrigerant only flows through the variable temperature evaporator and the freezing evaporator, and performs the following actions on the refrigerator:

[0124] 2.1) During variable temperature cooling, the refrigerant flows through the variable temperature evaporator and the freezer evaporator, causing the freezer evaporator to reach a relatively low temperature. Therefore, the freezer fan operation can be adjusted based on the actual freezer temperature. If the freezer temperature is higher than the set temperature, indicating that the freezer has not yet reached the set temperature and needs to continue cooling, the freezer fan is turned on; otherwise, the freezer fan is turned off.

[0125] 2.2) During freezing and refrigeration, the variable temperature chamber stops blowing air to defrost. When the variable temperature chamber is blowing air to defrost, the refrigerant flows through the variable temperature side, and the temperature of the variable temperature evaporator is very low, causing the variable temperature chamber to reach below zero, resulting in the variable temperature chamber being too low and freezing the food. Therefore, if the variable temperature chamber is no longer blown to defrost, this part of the impact on the variable temperature chamber can be reduced;

[0126] 2.3) When in refrigeration mode, stop the compressor and defrost heating. Since the refrigeration compartment cannot be cooled, try to reduce the speed at which the temperature of the variable temperature compartment rises as much as possible.

[0127] Case 3: When the electric control valve moves to the second outlet, making the second outlet open and the electric control valve cannot be switched to other states, after the freezer compartment finishes refrigeration, the compressor is controlled to stop, the refrigeration compartment stops blowing and defrosting, and the variable temperature room stops defrosting and heating. At this time, when the electric control valve switches to the freezing side and cannot be restored (i.e., the freezing side switches fault), combined with Figure 7 The refrigerant flow direction shown in the figure is that the refrigerant only flows through the refrigeration evaporator, and the refrigerator performs the following actions:

[0128] 3.1) Ignore the cooling needs of the refrigeration and variable temperature rooms. After the refrigeration and cooling are completed, control the compressor to stop, stop the air blowing and defrosting in the refrigeration room, and stop defrosting and heating in the variable temperature room. Because the refrigerant only flows through the freezing side, the refrigeration room and the variable temperature room cannot be cooled. Therefore, try to slow down the temperature rise rate of the variable temperature room and the refrigeration room as much as possible.

[0129] Furthermore, for the above three types of faults, the detailed intelligent operation strategies of the three-system refrigerator can be summarized as shown in Table 1 below.

[0130] Table 1 Examples of intelligent operation strategies for the three-system refrigerator electronic control valves under different fault types

[0131]

[0132] During the refrigeration process, a layer of frost will condense on the evaporator of an air-cooled refrigerator. The thickening of the frost layer will reduce the efficiency of heat exchange, resulting in a decrease in refrigeration capacity, so regular defrosting is required. Defrosting the evaporator of an air-cooled refrigerator is different from using a defrost heater. It is a defrosting method that uses air blowing. Through the temperature difference between the high-temperature air in the refrigerator compartment and the low-temperature surface of the evaporator, the fan-forced convection is used to accelerate heat exchange and melt the frost layer. This process does not require additional heating elements and mainly relies on the natural heat transfer between hot and cold air. Defrosting is generally started after the refrigerator has been running for a period of time, or by detecting the temperature of the defrost sensor. Therefore, when there is a fault in the electric valve switching to the refrigeration side, the defrost operation cannot be started during freezing and refrigeration, because the temperature of the refrigeration evaporator is very low at this time, which will cause the room temperature of the refrigerator compartment to be too low, causing the food to be frozen.

[0133] In this embodiment of the present invention, a fault-handling strategy for a three-system refrigerator achieves precise isolation of multi-circuit faults and system-level collaborative optimization through sophisticated, pattern-based parameter adjustments, mitigating further deterioration of the faults. Furthermore, by integrating the structural advantages of the three-system refrigerator with the fault-handling strategy, it provides a benchmark solution for the intelligent control of complex multi-circuit refrigeration systems.

[0134] For example, see Figure 14 , Figure 14 This is a fourth working flow diagram of the controller in the refrigerator provided by an embodiment of the present invention. When it is determined that the electronically controlled valve has failed and cannot be reset, the operating parameters of the refrigerator are adjusted according to the refrigeration state and the type of failure. In this case, there are the following two situations:

[0135] Case 1: When the electric control valve moves to the first outlet, so that the first outlet is in the open state and the electric control valve cannot be switched to other states, the freezing temperature of the freezer compartment is obtained; when the freezer compartment needs to be refrigerated, the refrigeration damper and the refrigeration fan are closed; when the refrigeration compartment needs to be refrigerated, the refrigeration fan is turned on when the freezing temperature is greater than the defrost temperature, and the refrigeration fan is turned off when the freezing temperature is less than or equal to the defrost temperature. At this time, when the electric control valve switches to the refrigeration side and cannot be restored (i.e., the refrigeration side switching failure), combined with Figure 9 The refrigerant flow direction shown in the figure is that the refrigerant flows through the refrigeration evaporator and the freezing evaporator, and performs the following actions on the refrigerator:

[0136] 4.1) During freezing and refrigeration, as the refrigerant flows through the refrigeration evaporator, the refrigeration damper and refrigeration fan are closed to prevent excessive cold from entering the refrigerator compartment. At the same time, the defrost request for the refrigerator compartment is canceled to prevent the air temperature from being too low during defrosting, which may freeze the food in the refrigerator compartment.

[0137] 4.2) During refrigeration, there is no actual cooling opportunity due to freezing. At this time, the temperature of the freezer compartment and the temperature of the freezer defrost sensor are judged. If the freezing temperature is lower than the defrost temperature, you can take this opportunity to cool down the freezer compartment and turn on the refrigeration fan. If it is higher, cancel this action. This can effectively lower the temperature of the freezer compartment and achieve a better cooling effect.

[0138] Case 2: When the electric control valve moves to the second outlet, making the second outlet open and the electric control valve cannot be switched to other states, the compressor is controlled to stop after the freezer compartment finishes refrigeration. At this time, when the electric control valve switches to the freezing side and cannot be restored (i.e., the freezing side switching failure), combined with Figure 10 The refrigerant flow direction shown in the figure is that the refrigerant only flows through the refrigeration evaporator, and the refrigerator performs the following actions:

[0139] 5.1) Ignore the defrosting requirements of the refrigerator and the cooling requirements of the refrigerator. After the freezing and cooling are completed, the compressor will stop. Since the refrigerant only flows through the freezing path, the refrigerator compartment cannot be cooled. Therefore, the speed at which the refrigerator compartment temperature rises should be minimized.

[0140] Furthermore, for the above two types of faults, the detailed intelligent operation strategies of the dual-system refrigerator can be summarized as shown in Table 2 below.

[0141] Table 2 Examples of intelligent operation strategies for dual-system refrigerator electronic control valves under different fault types

[0142]

[0143] In this embodiment of the present invention, by combining a dual-system architecture with an intelligent control strategy, the refrigerator maintains basic functionality even when a single system fails, mitigating further deterioration of the problem. Furthermore, by integrating the structural advantages of a dual-system refrigerator with a fault-handling strategy, it provides a benchmark solution for the intelligent control of complex multi-circuit refrigeration systems.

[0144] See also Figure 15 , Figure 15This is a flowchart of a refrigerator control method provided by an embodiment of the present invention, wherein the refrigerator is provided with an electrically controlled valve having a first outlet, a second outlet, and a third outlet; wherein the first outlet is connected to the inlet of a refrigeration capillary tube, the second outlet is connected to the inlet of a freezing capillary tube, and the third outlet is connected to the inlet of a temperature-variable capillary tube; the outlet of the refrigeration capillary tube is connected to the inlet of a refrigeration evaporator, which is used to supply air and cool the refrigerator compartment of the refrigerator; the outlet of the freezing capillary tube is connected to the inlet of a freezing evaporator, which is used to supply air and cool the refrigerator compartment of the refrigerator via a refrigeration fan; the outlet of the temperature-variable capillary tube is connected to the inlet of the temperature-variable evaporator, which is used to supply air and cool the refrigerator compartment of the refrigerator; the method comprises:

[0145] S101, when the electrically controlled valve moves to the first outlet, so that the first outlet is in an open state and the electrically controlled valve cannot be switched to other states, obtaining a freezing temperature of the freezing chamber;

[0146] S102: when the freezing chamber needs to be refrigerated, the defrosting function of the refrigerating chamber is not started when the refrigerating chamber reaches a defrosting condition;

[0147] S103, when the refrigeration chamber needs to be cooled, turning on the refrigeration fan when the freezing temperature is greater than the set temperature, and turning off the refrigeration fan when the freezing temperature is less than or equal to the set temperature;

[0148] S104: When the variable temperature room needs to be cooled, the compressor is controlled to stop.

[0149] Specifically, the method also includes: when the electric-controlled valve moves to the second outlet, so that the second outlet is in an open state and the electric-controlled valve cannot be switched to other states, after the freezer compartment finishes refrigeration, the compressor is controlled to stop, the refrigerator compartment is controlled to stop blowing air to defrost, and the variable temperature chamber is controlled to stop defrosting and heating.

[0150] Specifically, the method also includes: when the electric-controlled valve moves to the third outlet, so that the third outlet is in an open state and the electric-controlled valve cannot be switched to other states, obtaining the freezing temperature of the freezer compartment; when the freezer compartment needs to be refrigerated, the blowing and defrosting of the variable temperature chamber is not started when the variable temperature chamber reaches the defrosting conditions; when the refrigerated chamber needs to be refrigerated, controlling the compressor to stop; when the variable temperature chamber needs to be refrigerated, turning on the freezing fan when the freezing temperature is greater than the set temperature, and turning off the freezing fan when the freezing temperature is less than or equal to the set temperature.

[0151] It is worth noting that the detailed working process of the refrigerator control method described in the embodiment of the present invention can refer to the working process of the controller in the three-system refrigerator described in the above embodiment, and will not be repeated here.

[0152] See also Figure 16 , Figure 16 This is a flow chart of another refrigerator control method provided by an embodiment of the present invention, wherein the refrigerator is provided with an electrically controlled valve having a first outlet and a second outlet; wherein the first outlet is connected to the inlet of a refrigerating capillary tube, and the second outlet is connected to the inlet of a freezing capillary tube; the outlet of the refrigerating capillary tube is connected to the inlet of a refrigerating evaporator, and the refrigerating evaporator is used to supply air and cooling to the refrigerator compartment of the refrigerator through a refrigerating damper and a refrigerating fan; the outlet of the freezing capillary tube is connected to the inlet of a freezing evaporator, and the freezing evaporator is used to supply air and cooling to the freezer compartment of the refrigerator through a freezing fan; the method comprises:

[0153] S201: When the electrically controlled valve moves to the first outlet, so that the first outlet is in an open state and the electrically controlled valve cannot be switched to other states, obtaining a freezing temperature of the freezing chamber;

[0154] S202: When the freezing chamber needs to be refrigerated, close the refrigeration damper and the refrigeration fan;

[0155] S203. When the refrigerating chamber needs to be cooled, the refrigeration fan is turned on when the freezing temperature is greater than the defrosting temperature, and the refrigeration fan is turned off when the freezing temperature is less than or equal to the defrosting temperature.

[0156] Specifically, the method further includes: when the electrically controlled valve moves to the second outlet so that the second outlet is in an open state and the electrically controlled valve cannot be switched to other states, controlling the compressor to stop after the freezer compartment finishes refrigeration.

[0157] It is worth noting that the detailed working process of the refrigerator control method described in the embodiment of the present invention can refer to the working process of the controller in the dual-system refrigerator described in the above embodiment, and will not be repeated here.

[0158] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A refrigerator, characterized in that: include: compressor; The compressor outlet is connected to the condenser; The condenser is connected to the inlet of the electric control valve; The electrically controlled valve has a first outlet, a second outlet, and a third outlet; wherein the first outlet is connected to the inlet of the refrigeration capillary tube, the second outlet is connected to the inlet of the freezing capillary tube, and the third outlet is connected to the inlet of the temperature-variable capillary tube; The outlet of the refrigeration capillary tube is connected to the inlet of the refrigeration evaporator, and the refrigeration evaporator is used to supply air and cold to the refrigeration chamber of the refrigerator; The outlet of the freezing capillary tube is connected to the inlet of the freezing evaporator, and the freezing evaporator is used to supply air and cold to the freezing chamber of the refrigerator through a freezing fan; The outlet of the temperature-variable capillary tube is connected to the inlet of the temperature-variable evaporator, and the temperature-variable evaporator is used to supply air and cooling to the temperature-variable chamber of the refrigerator; A controller configured to: When the electric control valve moves to the first outlet, so that the first outlet is in an open state and the electric control valve cannot be switched to other states, obtaining the freezing temperature of the freezing chamber; When the freezing chamber needs to be refrigerated, the defrosting function of the refrigerating chamber is not started when the refrigerating chamber reaches the defrosting condition; When the refrigeration chamber needs to be refrigerated, the refrigeration fan is turned on when the freezing temperature is greater than the set temperature, and the refrigeration fan is turned off when the freezing temperature is less than or equal to the set temperature; When the variable temperature room needs to be cooled, the compressor is controlled to stop.

2. The refrigerator according to claim 1, wherein The controller is further configured to: When the electric control valve moves to the second outlet, so that the second outlet is in an open state and the electric control valve cannot be switched to other states, after the freezer finishes refrigeration, the compressor is controlled to stop, the refrigerator compartment is controlled to stop blowing air for defrosting, and the variable temperature room is controlled to stop defrosting and heating.

3. The refrigerator according to claim 1, wherein The controller is further configured to: When the electric control valve moves to the third outlet, so that the third outlet is in an open state and the electric control valve cannot be switched to other states, obtaining the freezing temperature of the freezing chamber; When the freezing chamber needs to be refrigerated, the defrosting of the variable temperature chamber is not started when the variable temperature chamber reaches the defrosting condition; When the refrigeration chamber needs to be refrigerated, controlling the compressor to stop; When the variable temperature room needs to be refrigerated, the refrigeration fan is turned on when the freezing temperature is greater than the set temperature, and the refrigeration fan is turned off when the freezing temperature is less than or equal to the set temperature.

4. A refrigerator, characterized in that: include: compressor; The compressor outlet is connected to the condenser; The condenser is connected to the inlet of the electric control valve; The electrically controlled valve has a first outlet and a second outlet; wherein the first outlet is connected to the inlet of the refrigeration capillary tube, and the second outlet is connected to the inlet of the freezing capillary tube; The outlet of the refrigeration capillary tube is connected to the inlet of the refrigeration evaporator, and the refrigeration evaporator is used to supply air and cooling to the refrigeration chamber of the refrigerator through the refrigeration damper and the refrigeration fan; The outlet of the freezing capillary tube is connected to the inlet of the freezing evaporator, and the freezing evaporator is used to supply air and cold to the freezing chamber of the refrigerator through a freezing fan; A controller configured to: When the electric control valve moves to the first outlet, so that the first outlet is in an open state and the electric control valve cannot be switched to other states, obtaining the freezing temperature of the freezing chamber; When the freezing chamber needs to be refrigerated, the refrigeration damper and the refrigeration fan are closed; When the refrigeration chamber needs to be refrigerated, the refrigeration fan is turned on when the freezing temperature is greater than the defrosting temperature, and the refrigeration fan is turned off when the freezing temperature is less than or equal to the defrosting temperature.

5. The refrigerator according to claim 4, wherein: The controller is further configured to: When the electric control valve moves to the second outlet, so that the second outlet is in an open state and the electric control valve cannot be switched to other states, the compressor is controlled to stop after the freezing chamber finishes refrigeration.

6. A refrigerator control method, characterized in that: The refrigerator is provided with an electric control valve, which has a first outlet, a second outlet, and a third outlet; wherein the first outlet is connected to the inlet of a refrigeration capillary tube, the second outlet is connected to the inlet of a freezing capillary tube, and the third outlet is connected to the inlet of a temperature-variable capillary tube; the outlet of the refrigeration capillary tube is connected to the inlet of a refrigeration evaporator, and the refrigeration evaporator is used to supply air and cool the refrigeration chamber of the refrigerator; the outlet of the freezing capillary tube is connected to the inlet of a freezing evaporator, and the freezing evaporator is used to supply air and cool the freezer chamber of the refrigerator through a refrigeration fan; the outlet of the temperature-variable capillary tube is connected to the inlet of a temperature-variable evaporator, and the temperature-variable evaporator is used to supply air and cool the variable temperature chamber of the refrigerator; the method comprises: When the electric control valve moves to the first outlet, so that the first outlet is in an open state and the electric control valve cannot be switched to other states, obtaining the freezing temperature of the freezing chamber; When the freezing chamber needs to be refrigerated, the defrosting function of the refrigerating chamber is not started when the refrigerating chamber reaches the defrosting condition; When the refrigeration chamber needs to be refrigerated, the refrigeration fan is turned on when the freezing temperature is greater than the set temperature, and the refrigeration fan is turned off when the freezing temperature is less than or equal to the set temperature; When the variable temperature room needs to be cooled, the compressor is controlled to stop.

7. The refrigerator control method according to claim 6, wherein: The method further comprises: When the electric control valve moves to the second outlet, so that the second outlet is in an open state and the electric control valve cannot be switched to other states, after the freezer compartment finishes refrigeration, the compressor is controlled to stop, the refrigerator compartment is controlled to stop blowing air for defrosting, and the variable temperature room is controlled to stop defrosting and heating.

8. The refrigerator control method according to claim 6, wherein: The method further comprises: When the electric control valve moves to the third outlet, so that the third outlet is in an open state and the electric control valve cannot be switched to other states, obtaining the freezing temperature of the freezing chamber; When the freezing chamber needs to be refrigerated, the defrosting of the variable temperature chamber is not started when the variable temperature chamber reaches the defrosting condition; When the refrigeration chamber needs to be refrigerated, controlling the compressor to stop; When the variable temperature room needs to be refrigerated, the refrigeration fan is turned on when the freezing temperature is greater than the set temperature, and the refrigeration fan is turned off when the freezing temperature is less than or equal to the set temperature.

9. A refrigerator control method, characterized in that: The refrigerator is provided with an electric-controlled valve, the electric-controlled valve having a first outlet and a second outlet; wherein the first outlet is connected to the inlet of a refrigerating capillary tube, and the second outlet is connected to the inlet of a freezing capillary tube; the outlet of the refrigerating capillary tube is connected to the inlet of a refrigerating evaporator, and the refrigerating evaporator is used to supply air and cooling to the refrigerating chamber of the refrigerator through a refrigerating damper and a refrigerating fan; the outlet of the freezing capillary tube is connected to the inlet of a freezing evaporator, and the freezing evaporator is used to supply air and cooling to the freezing chamber of the refrigerator through a freezing fan; the method comprises: When the electric control valve moves to the first outlet, so that the first outlet is in an open state and the electric control valve cannot be switched to other states, obtaining the freezing temperature of the freezing chamber; When the freezing chamber needs to be refrigerated, the refrigeration damper and the refrigeration fan are closed; When the refrigeration chamber needs to be refrigerated, the refrigeration fan is turned on when the freezing temperature is greater than the defrosting temperature, and the refrigeration fan is turned off when the freezing temperature is less than or equal to the defrosting temperature.

10. The refrigerator control method according to claim 9, wherein: The method further comprises: When the electric control valve moves to the second outlet, so that the second outlet is in an open state and the electric control valve cannot be switched to other states, the compressor is controlled to stop after the freezing chamber finishes refrigeration.

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