Refrigerator, control method and controller thereof

Abstract

The invention relates to the field of refrigeration equipment, in particular to a refrigerator, a control method and a controller thereof. The refrigerator comprises a double-suction compressor and a controller, the double-suction compressor comprises a first suction inlet, a second suction inlet and an exhaust port, an outlet of a refrigerating chamber evaporator is connected with the first suction inlet through a first air return pipe, and an outlet of a freezing chamber evaporator is connected with the second suction inlet through a second air return pipe; the controller is used for controlling the operation of the double-suction compressor, so that a refrigerant exchanges heat through the refrigerating chamber evaporator and the freezing chamber evaporator respectively; when the temperature of the refrigerating chamber is smaller than or equal to the first preset temperature, the switch valve is controlled to be closed, and the double-suction compressor is controlled to increase the rotating speed, so that the heat exchange efficiency of the freezing chamber is improved, the temperature of the freezing chamber is reduced to the shutdown temperature of the double-suction compressor quickly, the running time of the double-suction compressor is shortened, and the power consumption of the refrigerator is reduced.

Description

Technical Field

[0001] The present application relates to the field of refrigeration equipment, and in particular to a refrigerator, a control method and a controller thereof. Background Art

[0002] A refrigerator is a refrigeration device that maintains a constant low temperature. It is a common appliance used to preserve food or other items at low temperatures in life and is widely used in life and industry. In the process of food preservation, the stability of the indoor temperature of the refrigerator is very important. Large temperature fluctuations will have an adverse effect on the preservation of food.

[0003] In the related art, most refrigerator refrigeration methods use a compressor to complete the refrigeration cycle, and the heat transfer between the outdoor heat exchanger and the indoor heat exchanger is achieved through the refrigerant, thereby achieving the purpose of refrigeration. The compressor in the existing refrigerator refrigeration system is a single-suction compressor. The gaseous refrigerant that passes through the evaporator of the refrigerator compartment and the evaporator of the freezer compartment simultaneously returns to the compressor through the return air port of the compressor, which increases the compression ratio of the compressor and causes the refrigerator power to increase; when the refrigerator compartment has reached the lower limit of the refrigeration temperature, it continues to wait for the freezer compartment to reach the lower limit of the freezing temperature, and the single-suction compressor will stop, which increases the energy consumption of the compressor. Summary of the invention

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application provides a refrigerator, a control method and a controller thereof, which are conducive to reducing the compression ratio of the compressor and shortening the downtime of the compressor, so that the power consumption of the refrigerator becomes lower.

[0005] In a first aspect, an embodiment of the present application provides a refrigerator, comprising:

[0006] A double suction compressor, the double suction compressor comprising a first suction inlet, a second suction inlet and an exhaust port, the exhaust port being connected to the inlet of a condenser, the outlet of the condenser being connected to the inlet of the refrigerating chamber evaporator through a switch valve, the outlet of the refrigerating chamber evaporator being connected to the first suction inlet through a first return air pipe; the outlet of the condenser being also connected to the inlet of a freezing chamber evaporator, the outlet of the freezing chamber evaporator being connected to the second suction inlet through a second return air pipe;

[0007] The controller is used to control the operation of the double-suction compressor so that the refrigerant can perform heat exchange through the evaporator of the refrigerator compartment and the evaporator of the freezer compartment respectively; it is also used to control the switch valve to close when the temperature of the refrigerator compartment is less than or equal to a first preset temperature, and control the double-suction compressor to increase the speed.

[0008] The technical solution of the first aspect of the present application has at least one of the following advantages or beneficial effects: the refrigerator includes a double suction compressor, the double suction compressor includes a first suction inlet and a second suction inlet, the gaseous refrigerant passing through the evaporator of the cold storage chamber returns to the first suction inlet of the double suction compressor through the first return pipe, and the gaseous refrigerant passing through the evaporator of the freezing chamber returns to the second suction inlet of the double suction compressor through the second return pipe, thereby increasing the low pressure of the double suction compressor, reducing the compression ratio of the double suction compressor, and thus reducing the power of the refrigerator. When the temperature of the cold storage chamber is less than or equal to the first preset temperature, the refrigerant is controlled by the switch valve to only pass through the evaporator of the freezing chamber for heat exchange, and the double suction compressor is controlled to increase the speed, thereby improving the efficiency of the heat exchange of the freezing chamber, accelerating the reduction of the temperature of the freezing chamber to the preset shutdown temperature of the double suction compressor, shortening the running time of the double suction compressor, and thus reducing the power consumption of the refrigerator.

[0009] According to some embodiments of the present application, the switching valve is a valve component of a three-way valve, the valve component of the three-way valve includes a first outlet, a second outlet and an inlet, the condenser is connected to the refrigerator compartment evaporator through the inlet of the three-way valve and the first outlet of the three-way valve, and the condenser is connected to the freezer compartment evaporator through the inlet of the three-way valve and the second outlet of the three-way valve.

[0010] According to some embodiments of the present application, it also includes a first throttling component and a second throttling component, the first throttling component is arranged between the first outlet of the three-way valve and the inlet of the refrigerator compartment evaporator; the second throttling component is arranged between the second outlet of the three-way valve and the inlet of the freezer compartment evaporator.

[0011] According to some embodiments of the present application, a filter is further included, and the filter is arranged between the inlet of the three-way valve and the outlet of the condenser.

[0012] According to some embodiments of the present application, it also includes a refrigeration fan corresponding to the refrigeration chamber evaporator, a refrigeration fan corresponding to the freezer chamber evaporator, and a condensing fan corresponding to the condenser.

[0013] In a second aspect, an embodiment of the present application provides a method for controlling a refrigerator, the refrigerator comprising:

[0014] A double suction compressor, the double suction compressor comprising a first suction inlet, a second suction inlet and an exhaust port, the exhaust port being connected to the inlet of a condenser, the outlet of the condenser being connected to the inlet of the refrigerating chamber evaporator through a switch valve, the outlet of the refrigerating chamber evaporator being connected to the first suction inlet through a first return air pipe; the outlet of the condenser being also connected to the inlet of a freezing chamber evaporator, the outlet of the freezing chamber evaporator being connected to the second suction inlet through a second return air pipe;

[0015] The control method comprises:

[0016] Controlling the double suction compressor to operate so that the refrigerant exchanges heat through the refrigerating chamber evaporator and the freezing chamber evaporator respectively;

[0017] When the temperature of the refrigerating chamber is less than or equal to a first preset temperature, the switch valve is controlled to be closed, and the double-suction compressor is controlled to increase the rotation speed.

[0018] The technical solution of the second aspect of the present application has at least one of the following advantages or beneficial effects: after the refrigerator is powered on, the double suction compressor is controlled to operate so that the refrigerant is heat exchanged through the evaporator of the cold storage compartment and the evaporator of the freezer compartment respectively, and the evaporator of the cold storage compartment and the evaporator of the freezer compartment form two independent refrigeration cycles in pure parallel connection, and the cold storage compartment and the freezer compartment can be independently circulated and cooled at the same time, and when the temperature of the cold storage compartment is less than or equal to the first preset temperature, the switch valve is controlled to be closed, and the double suction compressor is controlled to increase the speed. By controlling the switch valve to be closed, the refrigerant is controlled to only pass through the evaporator of the freezer compartment for heat exchange, and the double suction compressor is controlled to increase the speed, the efficiency of the heat exchange in the freezer compartment is improved, the temperature of the freezer compartment is accelerated to be reduced to the shutdown temperature of the double suction compressor, and the operation time of the double suction compressor is shortened, thereby reducing the power consumption of the refrigerator.

[0019] According to some embodiments of the present application, the switch valve is a valve component of a three-way valve, the valve component of the three-way valve includes a first outlet, a second outlet and an inlet, the condenser is connected to the refrigerating chamber evaporator through the inlet of the three-way valve and the first outlet of the three-way valve, and the condenser is connected to the freezing chamber evaporator through the inlet of the three-way valve and the second outlet of the three-way valve;

[0020] When the temperature of the refrigerating chamber is less than or equal to the first preset temperature, the switch valve is controlled to be closed, and the double suction compressor is controlled to increase the speed, including:

[0021] When the temperature of the refrigerating chamber is less than or equal to the first preset temperature, the first outlet of the three-way valve is controlled to be closed, and the speed of the double-suction compressor is controlled to increase from the first speed to the second speed.

[0022] According to some embodiments of the present application, the control method further includes: when the temperature of the freezer compartment is less than or equal to a second preset temperature, and the temperature of the refrigeration compartment is less than a third preset temperature, controlling the double suction compressor to stop.

[0023] According to some embodiments of the present application, the control method also includes: when the temperature of the freezer compartment is greater than the second preset temperature, and the temperature of the refrigerator compartment is greater than the third preset temperature, controlling the double-suction compressor to slow down to a third speed, and controlling the first outlet of the three-way valve to open.

[0024] In a third aspect, an embodiment of the present application provides a controller comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the refrigerator control method as described in the technical solution of the first aspect when running the computer program.

[0025] Other features and advantages of the present application will be described in the following description, and partly become apparent from the description, or understood by practicing the present application. The purpose and other advantages of the present application can be realized and obtained by the structures specifically pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of a refrigerator with a single suction compressor in the related art;

[0027] Figure 2 It is a structural schematic diagram of another refrigerator with a single suction compressor in the related art;

[0028] Figure 3 is a structural schematic diagram of a refrigerator provided in an embodiment of the present application;

[0029] Figure 4 is a structural schematic diagram of another refrigerator provided in an embodiment of the present application;

[0030] Figure 5 is a structural schematic diagram of another refrigerator provided in an embodiment of the present application;

[0031] Figure 6 is a structural schematic diagram of another refrigerator provided in an embodiment of the present application;

[0032] Figure 7 is a flow chart of a refrigerator control method provided by an embodiment of the present application;

[0033] Figure 8 is a flow chart of a method for controlling a switch valve when the temperature of the refrigerating chamber is less than or equal to a first preset temperature provided by an embodiment of the present application;

[0034] Fig. 9 is a flow chart of a shutdown control method for a double-suction compressor provided in an embodiment of the present application;

[0035] Fig.10 is a flow chart of a method for controlling speed change of a double suction compressor provided in an embodiment of the present application;

[0036] Fig.11 is a flow chart of another method for controlling speed change of a double suction compressor provided in an embodiment of the present application;

[0037] Fig.12 It is a structural schematic diagram of a controller provided in an embodiment of the present application. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is further described in detail below in conjunction with the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. In addition, the characteristics, operations or features described in the specification can be combined in any appropriate manner to form various implementation methods. At the same time, the steps or actions in the method description can also be replaced or adjusted in order in a manner that is obvious to those skilled in the art. Therefore, the various sequences in the specification and the accompanying drawings are only for the purpose of clearly describing a certain embodiment and are not meant to be a necessary sequence, unless otherwise specified that a certain sequence must be followed.

[0039] In the description of this application, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0040] The serial numbers of the components in this document, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings).

[0041] A refrigerator is a refrigeration device that maintains a constant low temperature. It is a common appliance used to preserve food or other items at low temperatures in life and is widely used in life and industry. In the process of food preservation, the stability of the indoor temperature of the refrigerator is very important. Large temperature fluctuations will have an adverse effect on the preservation of food. In related technologies, refrigerator refrigeration methods are mostly completed by compressors. The heat transfer between the outdoor heat exchanger and the indoor heat exchanger is achieved through the refrigerant, thereby achieving the purpose of refrigeration.

[0042] Reference Figure 1 , Figure 1The invention relates to a refrigerator with a single-suction compressor 101 in the related art, comprising a single-suction compressor 101, a condenser 200, a refrigerator compartment evaporator 400, a freezer compartment evaporator 500, a three-way valve 300 and a throttling assembly 10; wherein the single-suction compressor 101 comprises an air intake port 121 and an air exhaust port 111, the air exhaust port 111 of the single-suction compressor 101 is connected to the inlet of the condenser 200, the outlet of the condenser 200 is connected to the throttling assembly 10 and connected to the inlet of the refrigerator compartment evaporator 400 through the inlet 310 and the first outlet 320 of the three-way valve, the inlet of the refrigerator compartment evaporator 400 is connected through the inlet 310 and the second outlet 330 of the three-way valve, the outlet of the refrigerator compartment evaporator 400 returns to the air intake port 121 of the single-suction compressor 101 through a return air pipeline, and the outlet of the freezer compartment evaporator 500 returns to the air intake port 121 of the single-suction compressor 101 through a return air pipeline. When the refrigerator is powered on, the high-temperature and high-pressure liquid refrigerant flows out from the exhaust port 111 of the single-suction compressor 101 and enters the condenser 200 to become a high-temperature and high-pressure gas-liquid mixed refrigerant. The gas-liquid mixed refrigerant is throttled by the throttling component 10 and enters the refrigerator compartment evaporator 400 through the inlet 310 and the first outlet 320 of the three-way valve for heat exchange; the gas-liquid mixed refrigerant is throttled by the throttling component 10 and enters the freezer compartment evaporator 500 through the inlet 310 and the second outlet 330 of the three-way valve for heat exchange. The gas-liquid mixed refrigerant is converted into a gaseous refrigerant after heat exchange in the refrigerator compartment evaporator 400 and the freezer compartment evaporator 500 respectively. The gaseous refrigerant passing through the refrigerator compartment evaporator 400 and the gaseous refrigerant passing through the freezer compartment evaporator 500 are simultaneously returned to the suction port 121 of the compressor through the return air pipe to realize the refrigeration cycle. When the temperature of the refrigerating chamber is less than or equal to the preset lower temperature limit of the refrigerating chamber and the temperature of the freezing chamber is less than or equal to the preset lower temperature limit of the freezing chamber, the refrigeration cycle is completed and the single suction compressor 101 is shut down.

[0043] Since the single-suction compressor 101 is provided with only one suction port 121, the gaseous refrigerant passing through the evaporator 400 of the refrigerator compartment and the gaseous refrigerant passing through the evaporator 500 of the freezer compartment needs to return to the suction port 121 of the compressor through the return air pipe at the same time, which increases the compression ratio of the compressor and makes the power of the refrigerator higher. In addition, the single-suction compressor 101 in the prior art needs to be shut down only when the temperature of the refrigerator compartment is less than or equal to the preset lower limit of the refrigerator compartment temperature and the temperature of the freezer compartment is less than or equal to the preset lower limit of the freezer compartment temperature, which increases the energy consumption of the compressor. The single-suction compressor 101 will start the refrigeration cycle only when the temperature of the refrigerator compartment is greater than the preset upper limit of the refrigerator compartment temperature and the temperature of the freezer compartment is greater than the preset upper limit of the freezer compartment temperature, resulting in a large temperature fluctuation in the refrigerator compartment; there is also a situation where the refrigerator compartment temperature is greater than the preset upper limit of the refrigerator compartment temperature, but the temperature of the freezer compartment is still less than the preset upper limit of the freezer compartment temperature, and the single-suction compressor 101 does not start the refrigeration cycle, resulting in the temperature of the refrigerator compartment cannot be reduced in time, which is not easy to keep the food fresh.

[0044] Reference Figure 2 , Figure 2 The invention is another refrigerator with a single-suction compressor 101 in the prior art, comprising a single-suction compressor 101, a condenser 200, a refrigerator compartment evaporator 400, a freezer compartment evaporator 500, a three-way valve 300 and a throttling assembly 10; the single-suction compressor 101 comprises an air intake port 121 and an air exhaust port 111, the air exhaust port 111 of the single-suction compressor 101 is connected to the inlet of the condenser 200, the outlet of the condenser 200 is connected to the throttling assembly 10 and is connected to the inlet of the refrigerator compartment evaporator 400 through the inlet 310 and the first outlet 320 of the three-way valve, and is connected to the inlet of the refrigerator compartment evaporator 400 through the inlet 310 and the second outlet 330 of the three-way valve; the outlet of the freezer compartment evaporator 500 is connected to the inlet of the refrigerator compartment evaporator 400, and the outlet of the refrigerator compartment evaporator 400 returns to the air intake port 121 of the single-suction compressor 101 through a return air pipeline. When the refrigerator is powered on, the high-temperature and high-pressure liquid refrigerant flows out from the exhaust port 111 of the single-suction compressor 101 and enters the condenser 200 to become a high-temperature and high-pressure gas-liquid mixed refrigerant. The gas-liquid mixed refrigerant is converted into a gaseous refrigerant through heat exchange in the refrigerating chamber evaporator 400 and the freezing chamber evaporator 500 respectively. The gaseous refrigerant that completes heat exchange in the freezing chamber evaporator 500 is output to the refrigerator chamber evaporator 400 and returns to the suction port 121 of the single-suction compressor 101 through the return air pipe together with the gaseous refrigerant that completes heat exchange in the refrigerator chamber evaporator 400.

[0045] Since the single-suction compressor 101 is provided with only one air intake port 121, the outlet of the freezer evaporator 500 is connected to the inlet of the refrigerator evaporator 400 through a pipeline, and the gaseous refrigerant that has completed heat exchange in the freezer evaporator 500 is output to the refrigerator evaporator 400 and returns to the air intake port 121 of the single-suction compressor 101 through the return pipe together with the gaseous refrigerant that has completed heat exchange through the refrigerator evaporator 400. This refrigeration method cannot realize independent refrigeration cycle and independent freezing cycle. When the temperature of the refrigerator is less than or equal to the preset lower limit of the refrigerator temperature and it is necessary to wait until the temperature of the freezer is less than or equal to the preset lower limit of the freezer temperature, the single-suction compressor 101 will stop, which increases the energy consumption of the compressor. When the temperature of the refrigerator is greater than the preset upper limit of the refrigerator temperature and the temperature of the freezer is greater than the preset upper limit of the freezer temperature, the single-suction compressor 101 will start the refrigeration cycle, resulting in large temperature fluctuations in the refrigerator.

[0046] Based on this, the embodiment of the present application provides a refrigerator, a control method and a controller thereof, which are conducive to reducing the power consumption of the refrigerator. The double suction compressor provided in the present application includes two suction inlets, namely a first suction inlet and a second suction inlet. The evaporator of the refrigerating chamber is connected to the first suction inlet of the compressor through a first return air pipe, and the evaporator of the freezing chamber is connected to the second suction inlet of the compressor through a second return air pipe, thereby reducing the compression ratio of the refrigerator. When the temperature of the refrigerating chamber is less than or equal to the first preset temperature, the refrigerant is controlled by the switch valve to only pass through the evaporator of the freezing chamber for heat exchange, and the double suction compressor is controlled to increase the speed, thereby improving the efficiency of heat exchange in the freezing chamber, accelerating the reduction of the temperature of the freezing chamber to the shutdown temperature of the double suction compressor, shortening the operation time of the double suction compressor, and thus reducing the power consumption of the refrigerator.

[0047] The embodiments of the present application are further described below in conjunction with the accompanying drawings.

[0048] Reference Figure 3 , Figure 3 1 is a schematic diagram of the structure of a refrigerator provided by an embodiment of the present application, wherein the refrigerator comprises a double-suction compressor 100, the double-suction compressor 100 comprises a first suction inlet 120, a second suction inlet 130 and an exhaust port 110, the exhaust port 110 is connected to the inlet of a condenser 200, the outlet of the condenser 200 is connected to the inlet of a refrigerator evaporator 400 through a switch valve 300, the outlet of the refrigerator evaporator 400 is connected to the first suction inlet 120 through a first return air pipe; the outlet of the condenser 200 is also connected to the inlet of a freezer evaporator 500, the outlet of the freezer evaporator 500 is connected to the second suction inlet 130 through a second return air pipe; the refrigerator further comprises a controller (not shown) for controlling the operation of the double-suction compressor 100 so that the refrigerant is heat exchanged through the refrigerator evaporator 400 and the freezer evaporator 500 respectively; and is also used for controlling the switch valve 300 to close when the temperature of the refrigerator is less than or equal to the first preset temperature, and controlling the double-suction compressor 100 to increase the speed.

[0049] The refrigerator in the present application includes a double suction compressor 100, which includes two suction inlets, namely a first suction inlet 120 and a second suction inlet 130. The gaseous refrigerant passing through the refrigerating chamber evaporator 400 returns to the first suction inlet 120 of the double suction compressor 100 through the first return pipe, and the gaseous refrigerant passing through the freezing chamber evaporator 500 returns to the second suction inlet 130 of the double suction compressor 100 through the second return pipe, increasing the low pressure of the double suction compressor 100, so that the compression ratio of the double suction compressor 100 is reduced, thereby reducing the power of the refrigerator. When the temperature of the refrigerating chamber is less than or equal to the first preset temperature, the refrigerant is controlled by the switch valve 300 to only pass through the freezing chamber evaporator 500 for heat exchange, and the double suction compressor 100 is controlled to increase the speed, thereby improving the efficiency of the heat exchange in the freezing chamber, accelerating the reduction of the temperature of the freezing chamber to the preset shutdown temperature of the double suction compressor 100, shortening the running time of the double suction compressor 100, and reducing the power consumption of the refrigerator.

[0050] It should be noted that the first preset temperature is a preset temperature of the refrigerator chamber that is suitable for preserving food. Preferably, in some embodiments of the present application, the first preset temperature is between 3°C and 8°C. The magnitude of the first preset temperature can be set according to actual conditions, and the embodiments of the present application do not limit the magnitude of the first preset temperature.

[0051] Most refrigerator compressors in the prior art use double-cylinder double-suction compressors and jet reheat compressors. Double-cylinder double-suction compressors have a small cylinder diameter and many assembly parts, which complicates the compressor structure and increases the difficulty of assembling the compressor. Jet reheat compressors cannot solve the defrosting problem. When the refrigerator is powered on for a long time, it is easy for the refrigerator to freeze. It should be noted that in some embodiments of the present application, different from the double-cylinder double-suction compressor and jet reheat compressor in the prior art, the present application uses a single-cylinder double-suction compressor.

[0052] The single-cylinder double-suction compressor is provided with a compression cylinder, an exhaust port and two suction inlets, the two suction inlets are respectively a first suction inlet and a second suction inlet, and a piston compression cylinder is provided in the compression cylinder for compressing the refrigerant to form a high-temperature and high-pressure liquid refrigerant. The compression cylinder in the double-suction compressor 100 has a large diameter and few parts required for assembly, which makes the assembly and manufacturing process of the double-suction compressor simple; the crank connecting rod is rotated by the external main force to push the piston, and the piston goes back and forth to quickly send out and quickly suck in the refrigerant, thereby improving the compression efficiency of the compressor. In the present application, the gaseous refrigerant passing through the refrigerator compartment evaporator 400 returns to the first air intake 120 of the double-intake compressor 100 through the first return air pipe, and the gaseous refrigerant passing through the freezer compartment evaporator 500 returns to the second air intake 130 of the double-intake compressor 100 through the second return air pipe, thereby increasing the low pressure of the double-intake compressor 100 and reducing the compression ratio of the double-intake compressor 100, thereby reducing the power of the refrigerator, and effectively solving the problem of large compression ratio of traditional single-cylinder compressors.

[0053] In some embodiments of the present application, the double suction compressor 100 further includes a process pipe, which is used as a port for refrigerant filling, refrigerant discharge, and testing of the compressor and the connected condenser, and is also used as a port for vacuuming and system pressure testing. When a refrigerator fails during operation, inspection and maintenance can be performed at the process pipe.

[0054] Reference Figure 4 , Figure 4 1 is a schematic diagram of the structure of another refrigerator provided in an embodiment of the present application, the refrigerator includes a double-suction compressor 100 and a filter 600, the double-suction compressor 100 includes a first suction inlet 120, a second suction inlet 130 and an exhaust port 110, the exhaust port 110 is connected to the inlet of the condenser 200, the outlet of the condenser 200 is connected to the filter 600, the condenser 200 is connected to the switch valve 300 through the filter 600 and is connected to the inlet of the refrigerator evaporator 400 through the switch valve 300, the condenser 200 is connected to the switch valve 300 through the filter 600 and is connected to the inlet of the freezer evaporator 500 through the switch valve 300, the outlet of the refrigerator evaporator 400 is connected to the first suction inlet 120 through the first return air pipe, and the outlet of the freezer evaporator 500 is connected to the second return air pipe and the second suction inlet 130.

[0055] In some embodiments of the present application, the switch valve 300 is a valve assembly of a three-way valve, and the valve assembly of the three-way valve includes an inlet 310, a first outlet 320, and a second outlet 330. The condenser 200 is connected to the evaporator 400 of the refrigerating chamber through the inlet 310 of the three-way valve and the first outlet 320 of the three-way valve, and the condenser 200 is connected to the evaporator 500 of the freezing chamber through the inlet 310 of the three-way valve and the second outlet 330 of the three-way valve. The flow direction of the refrigerant is controlled by the switch of the valve assembly of the three-way valve. When the temperature of the refrigerating chamber is less than or equal to the first preset temperature, the first outlet 320 of the three-way valve is controlled to be closed, so that the refrigerant only passes through the evaporator 500 of the freezing chamber for heat exchange, and the double suction compressor 100 is controlled to increase the speed, thereby improving the efficiency of heat exchange in the freezing chamber, accelerating the reduction of the temperature of the freezing chamber to the shutdown temperature of the double suction compressor 100, shortening the running time of the double suction compressor 100, and reducing the power consumption of the refrigerator.

[0056] In some embodiments of the present application, a filter 600 is provided in the refrigerator, and the filter 600 is composed of a molecular sieve and a filter mesh. The filter 600 plays the role of filtering impurities, dust and dirt and absorbing the residual moisture in the refrigeration system during the refrigeration process; since the refrigerant will produce impurities such as moisture, solid powder and dirt during the refrigeration cycle, the throttling device may be blocked in severe cases; in addition, the mixed moisture in the refrigerant is very harmful to the refrigeration system, therefore, it is extremely important to set the filter 600 to dry and filter the refrigerant, and the filter 600 can prevent ice blockage and reduce the corrosion of moisture to the refrigeration system. Since the filter 600 can also filter out debris in the refrigeration system, such as metal chips, various oxides and dust, it can effectively prevent debris from clogging the refrigerant pipeline and prevent impurities from entering the compressor to cause serious wear of the piston, cylinder, bearing, etc., and reduce the possibility of damage to the double suction compressor 100.

[0057] Reference Figure 5 , Figure 5 It is a structural schematic diagram of another refrigerator provided by an embodiment of the present application, the refrigerator includes a double suction compressor 100, a condenser 200, a valve assembly of a three-way valve, a refrigerator compartment evaporator 400, a freezer compartment evaporator 500 and a filter 600, and also includes a first throttling assembly 700 and a second throttling assembly 800, wherein the double suction compressor 100 includes two suction inlets, namely a first suction inlet 120 and a second suction inlet 130, and the valve assembly of the three-way valve includes an exhaust port 110, a first suction inlet 120 and a second suction inlet 130. The first throttling assembly 700 is arranged between the first outlet 320 of the three-way valve and the inlet of the refrigerator compartment evaporator 400, and the second throttling assembly 800 is arranged between the second outlet 330 of the three-way valve and the inlet of the freezer compartment evaporator 500.

[0058] The high-temperature and high-pressure refrigerant flows out from the exhaust port 110 of the double-suction compressor 100, enters the condenser 200, and then flows into the filter 600 for drying filtration and impurity filtration, thereby reducing the corrosion of moisture to the refrigeration system and the blockage of impurities to the refrigeration system; the refrigerant flowing through the filter 600 passes through the inlet 310 and the first outlet 320 of the three-way valve, and then enters the evaporator 400 of the cold storage room for heat exchange after throttling by the first throttling component 700; the refrigerant flowing through the filter 600 passes through the inlet 310 and the second outlet 320 of the three-way valve. 0 flows through the second throttling assembly 800 for throttling and then enters the freezing chamber evaporator 500 for heat exchange. The gaseous refrigerant passing through the refrigerating chamber evaporator 400 returns to the first suction inlet 120 of the double suction compressor 100 through the first return pipe. The gaseous refrigerant passing through the freezing chamber evaporator 500 returns to the second suction inlet 130 of the double suction compressor 100 through the second return pipe, thereby increasing the low pressure of the double suction compressor 100, reducing the compression ratio of the double suction compressor 100, and thus reducing the power of the refrigerator. When the temperature of the refrigerating chamber is less than or equal to the first preset temperature, the first outlet 320 of the three-way valve is controlled to be closed, so that the refrigerant only passes through the freezing chamber evaporator for heat exchange, and controls the double suction compressor 100 to increase the speed, thereby improving the efficiency of heat exchange in the freezing chamber, accelerating the reduction of the temperature of the freezing chamber to the shutdown temperature of the double suction compressor, shortening the running time of the double suction compressor, and thus reducing the power consumption of the refrigerator.

[0059] By arranging a first throttling assembly 700 between the first outlet 320 of the three-way valve and the inlet of the refrigerating chamber evaporator 400 for throttling, and arranging a second throttling assembly 800 between the second outlet 330 of the three-way valve and the inlet of the freezing chamber evaporator 500 for throttling, the refrigerant flow rate flowing into the refrigerating chamber evaporator 400 and the refrigerant flow rate flowing into the freezing chamber evaporator 500 can be controlled, so that the refrigerant flow rate matches the heat load of the refrigerating chamber evaporator 400 or the freezing chamber evaporator 500. When the heat load of the refrigerating chamber evaporator 400 or the freezing chamber evaporator 500 increases, the opening of the throttling assembly increases accordingly, and the refrigerant flow rate increases accordingly, and vice versa, the refrigerant flow rate decreases. The first throttling assembly 700 and the second throttling assembly 800 can also control the superheat and the evaporation liquid level.

[0060] It should be noted that, in some embodiments of the present application, the first throttling component 700 and the second throttling component 800 are capillaries, and the first throttling component 700 and the second throttling component 800 can also be one or more of an electronic expansion valve, a thermal expansion valve and a manual expansion valve. The embodiments of the present application do not limit the types of the first throttling component 700 and the second throttling component 800.

[0061] Reference Figure 6 , Figure 6It is a structural schematic diagram of another refrigerator system provided in an embodiment of the present application, wherein the refrigerator includes a double-suction compressor 100, a condenser 200, a valve assembly of a three-way valve, a refrigerator compartment evaporator 400, a freezer compartment evaporator 500, a filter 600, a first throttling assembly 700 and a second throttling assembly 800; it also includes a refrigeration fan 410 corresponding to the refrigerator compartment evaporator 400, a refrigeration fan 510 corresponding to the freezer compartment evaporator 500 and a condensing fan 210 corresponding to the condenser 200.

[0062] In some embodiments of the present application, the refrigeration fan 410, the freezing fan 510 and the condensing fan 210 all include wiring terminals and fan blades; the wiring terminals of the condensing fan 210 are connected to the controller to control the start and stop and the speed of the condensing fan 210. After the fan blades rotate, the air is driven to pass through the condenser 200 at a certain speed to form forced convection heat exchange, and the heat of the condenser 200 can be blown into the room; similarly, the refrigeration fan 410 is provided with wiring terminals and fan blades, and the wiring terminals are connected to the controller to control the start and stop and the speed of the refrigeration fan 410 The fan blades rotate to drive the air in the refrigerator's refrigerating chamber to pass through the evaporator 400 of the refrigerating chamber at a certain speed to form forced convection heat exchange, and the coldness of the evaporator 400 of the refrigerating chamber can be blown into the refrigerator's refrigerating chamber; the refrigerating fan 510 is provided with a wiring terminal and a fan blade, and the wiring terminal is connected to the controller to control the start and stop and the speed of the refrigerating fan 510. The fan blades rotate to drive the air in the refrigerator's refrigerating chamber to pass through the evaporator 500 of the refrigerating chamber at a certain speed to form forced convection heat exchange, and the coldness of the evaporator 500 of the refrigerating chamber can be blown into the refrigerator's refrigerating chamber. By rotating the refrigerating fan 410 and the refrigerating fan 510 at a preset speed, the heat exchange efficiency of the evaporator 400 of the refrigerating chamber and the evaporator 500 of the refrigerating chamber is accelerated, and the refrigeration cycle is accelerated, thereby shortening the operation time of the double suction compressor 100 and reducing the power consumption of the refrigerator.

[0063] Reference Figure 7 , Figure 7 is a flow chart of a refrigerator control method provided by an embodiment of the present application, such as Figure 3 As shown, the refrigerator includes a double-suction compressor 100, the double-suction compressor 100 includes a first suction inlet 120, a second suction inlet 130 and an exhaust port 110, the exhaust port 110 is connected to the inlet of the condenser 200, the outlet of the condenser 200 is connected to the inlet of the refrigerating chamber evaporator 400 through the switch valve 300, and the outlet of the refrigerating chamber evaporator 400 is connected to the first suction inlet 120 through the first return air pipe; the outlet of the condenser 200 is also connected to the inlet of the freezing chamber evaporator 500, and the outlet of the freezing chamber evaporator 500 is connected to the second suction inlet 130 through the second return air pipe; the control method of the refrigerator includes steps S100 and S200, specifically,

[0064] S100: Control the double suction compressor to operate so that the refrigerant is heat exchanged through the evaporator of the refrigerating chamber and the evaporator of the freezing chamber respectively;

[0065] S200: When the temperature of the refrigerating chamber is less than or equal to the first preset temperature, the switch valve is controlled to close, and the double-suction compressor is controlled to increase the speed.

[0066] After the refrigerator is powered on, the double suction compressor is controlled to operate so that the refrigerant exchanges heat through the evaporator of the refrigerating chamber and the evaporator of the freezing chamber respectively. The evaporator of the refrigerating chamber and the evaporator of the freezing chamber form two independent refrigeration cycles in pure parallel connection. The refrigerating chamber and the freezing chamber can circulate and cool down independently at the same time. When the temperature of the refrigerating chamber is less than or equal to the first preset temperature, the switch valve is controlled to close, and the double suction compressor is controlled to increase the speed. By controlling the switch valve to close, the refrigerant is controlled to exchange heat only through the evaporator of the freezing chamber. By controlling the double suction compressor to increase the speed, the efficiency of the heat exchange in the freezing chamber is improved, the temperature of the freezing chamber is accelerated to the shutdown temperature of the double suction compressor, and the operation time of the double suction compressor is shortened, thereby reducing the power consumption of the refrigerator.

[0067] It should be noted that the first preset temperature is a preset temperature of the refrigerator chamber that is suitable for preserving food. Preferably, in some embodiments of the present application, the first preset temperature is between 3°C and 8°C. The magnitude of the first preset temperature can be set according to actual conditions, and the embodiments of the present application do not limit the magnitude of the first preset temperature.

[0068] Reference Figure 8 , Figure 8 Flow chart of a control method for a switch valve when the temperature of a refrigerating chamber is less than or equal to a first preset temperature provided by an embodiment of the present application; the refrigerator comprises a switch valve, in an embodiment of the present application, the switch valve is a valve assembly of a three-way valve, the valve assembly of the three-way valve comprises a first outlet, a second outlet and an inlet, the condenser is connected to the refrigerating chamber evaporator through the inlet of the three-way valve and the first outlet of the three-way valve, and the condenser is connected to the freezing chamber evaporator through the inlet of the three-way valve and the second outlet of the three-way valve; the control method for the switch valve when the temperature of the refrigerating chamber is less than or equal to the first preset temperature comprises steps S100 and S210, specifically,

[0069] S100: Control the double suction compressor to operate so that the refrigerant is heat exchanged through the evaporator of the refrigerating chamber and the evaporator of the freezing chamber respectively;

[0070] S210: When the temperature of the refrigerating chamber is less than or equal to the first preset temperature, the first outlet of the three-way valve is controlled to be closed, and the speed of the double-suction compressor is controlled to increase from the first speed to the second speed.

[0071] The flow direction of the refrigerant is controlled by switching the valve assembly of the three-way valve. When the temperature of the refrigerating chamber is less than or equal to the first preset temperature, the first outlet of the three-way valve is controlled to be closed, so that the refrigerant only passes through the freezer chamber evaporator for heat exchange, and the double-suction compressor is controlled to increase the speed, thereby improving the efficiency of the heat exchange in the freezer chamber, accelerating the reduction of the temperature of the freezer chamber to the shutdown temperature of the double-suction compressor, shortening the operating time of the double-suction compressor, and thus reducing the power consumption of the refrigerator.

[0072] It should be noted that the second speed is higher than the first speed. By controlling the speed of the double-suction compressor from the first speed to the second speed, the temperature of the freezer compartment is accelerated to the shutdown temperature of the double-suction compressor, thereby shortening the operating time of the double-suction compressor and reducing the power consumption of the refrigerator.

[0073] Reference Fig. 9 , Fig. 9 is a flow chart of a shutdown control method for a double suction compressor provided in an embodiment of the present application, including steps S100 and S300. Specifically,

[0074] S100: Control the double suction compressor to operate so that the refrigerant is heat exchanged through the evaporator of the refrigerating chamber and the evaporator of the freezing chamber respectively;

[0075] S300: When the temperature of the freezing chamber is less than or equal to the second preset temperature, and the temperature of the refrigerating chamber is less than the third preset temperature, the double suction compressor is controlled to stop.

[0076] After the refrigerator is powered on, the double-suction compressor is controlled to run so that the refrigerant exchanges heat through the evaporator of the refrigerator compartment and the evaporator of the freezer compartment respectively. The evaporator of the refrigerator compartment and the evaporator of the freezer compartment form two independent refrigeration cycles in pure parallel. The refrigerator compartment and the freezer compartment can be cooled by independent circulation at the same time. When the temperature of the freezer compartment is less than or equal to the second preset temperature, the refrigerator completes the independent refrigeration cycle of the freezer compartment. At the same time, the temperature of the refrigerator compartment is less than the third preset temperature and has not exceeded the upper limit of the refrigeration temperature of the refrigerator compartment. At this time, the double-suction compressor is controlled to stop.

[0077] It should be noted that the second preset temperature is a preset temperature of the freezer suitable for freezing food. Preferably, in some embodiments of the present application, the second preset temperature is between -15°C and -18°C. The second preset temperature can be set according to actual conditions, and the embodiments of the present application do not limit the second preset temperature.

[0078] It should be noted that the third preset temperature is the upper limit of the temperature suitable for preserving food in the refrigerator, which can be set according to the season, room temperature and type of ingredients, and the third preset temperature is greater than the first preset temperature. The embodiment of the present application does not limit the size of the third preset temperature.

[0079] Reference Fig.10 , Fig.10 is a flow chart of a method for controlling the speed change of a double suction compressor provided in an embodiment of the present application, comprising steps S100 and S400. Specifically,

[0080] S100: Control the double suction compressor to operate so that the refrigerant is heat exchanged through the evaporator of the refrigerating chamber and the evaporator of the freezing chamber respectively;

[0081] S400: When the temperature of the freezer compartment is greater than the second preset temperature and the temperature of the refrigerator compartment is greater than the third preset temperature, the double suction compressor is controlled to slow down to a third speed, and the first outlet of the three-way valve is controlled to open.

[0082] After the refrigerator is powered on, the double-suction compressor is controlled to run so that the refrigerant exchanges heat through the evaporator of the refrigerator compartment and the evaporator of the freezer compartment respectively. The evaporator of the refrigerator compartment and the evaporator of the freezer compartment form two independent refrigeration cycles in pure parallel connection. The refrigerator compartment and the freezer compartment can circulate and cool down independently at the same time. When the temperature of the freezer compartment is still greater than the second preset temperature, it means that the freezing and refrigeration cycle has not been completed. However, at this time, the temperature of the refrigerator compartment is greater than the third preset temperature, which means that the temperature of the refrigerator compartment has exceeded the upper temperature limit suitable for preserving food. The double-suction compressor is controlled to slow down to the third speed, and the first outlet of the switch valve is controlled to open, so that the evaporator of the refrigerator compartment and the evaporator of the freezer compartment refrigerate and circulate at the same time, ensuring that the refrigerator compartment is continuously cooled. After the double-suction compressor reduces the speed, the cooling capacity of the freezer compartment drops to a balance with the current heat load, and the temperature of the freezer compartment is in a constant temperature state and is lower than the upper temperature limit of the freezer compartment, ensuring that the refrigerator compartment and the freezer compartment can realize independent refrigeration cycles at the same time, thereby improving the refrigeration efficiency of the refrigerator.

[0083] Reference Fig.11 , Fig.11 is a flow chart of a control method for speed change of a double suction compressor provided in an embodiment of the present application, comprising steps S100, S400 and S500. Specifically,

[0084] S100: Control the double suction compressor to operate so that the refrigerant is heat exchanged through the evaporator of the refrigerating chamber and the evaporator of the freezing chamber respectively;

[0085] S400: When the temperature of the freezing chamber is greater than the second preset temperature, and the temperature of the refrigerating chamber is greater than the third preset temperature, the double suction compressor is controlled to reduce the speed to the third speed, and the first outlet of the three-way valve is controlled to open;

[0086] S500: When the temperature of the refrigerating chamber is less than or equal to the first preset temperature, the first outlet of the three-way valve is controlled to be closed, and the speed of the double-suction compressor is controlled to increase from the third speed to the second speed.

[0087] The refrigerator and freezer can be cooled by independent circulation at the same time. When the temperature of the freezer is still greater than the second preset temperature, and the temperature of the refrigerator is greater than the third preset temperature, it means that the temperature of the refrigerator has exceeded the upper temperature limit suitable for preserving food. The double suction compressor is controlled to reduce the speed to the third speed, and the first outlet of the switch valve is controlled to open, so that the evaporator of the refrigerator and the evaporator of the freezer are refrigerated and circulated at the same time to ensure continuous cooling of the refrigerator. Since the cooling capacity of the freezer drops to a balance with the current heat load after the double suction compressor reduces the speed, the temperature of the freezer is in a constant temperature state and is lower than the upper temperature limit of the freezer, ensuring that the refrigerator and the freezer can realize independent refrigeration cycles at the same time. When the temperature of the refrigerator drops to less than or equal to the first preset temperature, the first outlet of the three-way valve is controlled to be closed, and the double suction compressor is controlled to increase from the third speed to the second speed, so that the freezer resumes the independent refrigeration cycle to continue to accelerate the freezing and cooling, thereby improving the efficiency of heat exchange in the freezer, accelerating the reduction of the temperature of the freezer to the shutdown temperature of the double suction compressor, shortening the running time of the double suction compressor, and reducing the power consumption of the refrigerator.

[0088] Reference Fig.12 , Fig.12It is a structural diagram of a controller 1000 provided in an embodiment of the present application, including a processor 1001, which can be implemented by a general-purpose CPU (Central Processing Unit), a microprocessor, an application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement a refrigerator control method provided in an embodiment of the present application; a memory 1002, which can be implemented in the form of a read-only memory 1002 (Read Only Memory, ROM), a static storage device, a dynamic storage device or a random access memory 1002 (Random Access Memory, RAM) and the like. The memory 1002 can store an operating system and other application programs. When the technical solutions provided in the embodiments of this specification are implemented by software or firmware, the relevant program codes are stored in the memory 1002 and are called by the processor 1001 to execute the embodiments of this application; the input / output interface 1003 is used to implement information input and output; the communication interface 1004 is used to implement communication interaction between this device and other devices, and communication can be achieved through wired methods (such as USB, network cables, etc.) or wireless methods (such as mobile networks, WIFI, Bluetooth, etc.); a bus transmits information between various components of the device (such as the processor 1001, the memory 1002, the input / output interface 1003 and the communication interface 1004); wherein the processor 1001, the memory 1002, the input / output interface 1003 and the communication interface 1004 are connected to each other within the device through the bus.

[0089] It will be appreciated by those skilled in the art that all or some of the steps and systems in the disclosed method above may be implemented as software, firmware, hardware and appropriate combinations thereof. Some physical components or all physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor or a microprocessor, or may be implemented as hardware, or may be implemented as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer-readable storage medium (or a non-transitory medium) and a communication medium (or a temporary medium). As known to those skilled in the art, the term computer-readable storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules or other data). Computer-readable storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, disk storage or other magnetic storage devices, or any other medium that may be used to store desired information and may be accessed by a computer. Furthermore, it is well known to those skilled in the art that communication media typically embodies computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0090] The above is a specific description of the preferred implementation of the present application, but the present application is not limited to the above-mentioned implementation mode. Technical personnel familiar with the field can also make various equivalent deformations or substitutions without violating the spirit of the present application. These equivalent deformations or substitutions are all included in the scope defined by the claims of the present application.

Claims

1. A refrigerator, characterized in that: include: A double suction compressor, the double suction compressor comprising a first suction inlet, a second suction inlet and an exhaust port, the exhaust port being connected to the inlet of a condenser, the outlet of the condenser being connected to the inlet of a refrigerator compartment evaporator via a switch valve, the outlet of the refrigerator compartment evaporator being connected to the first suction inlet via a first return air pipe; the outlet of the condenser being also connected to the inlet of a freezer compartment evaporator, the outlet of the freezer compartment evaporator being connected to the second suction inlet via a second return air pipe; The controller is used to control the operation of the double-suction compressor so that the refrigerant can perform heat exchange through the evaporator of the refrigerator compartment and the evaporator of the freezer compartment respectively; it is also used to control the switch valve to close when the temperature of the refrigerator compartment is less than or equal to a first preset temperature, and control the double-suction compressor to increase the speed.

2. The refrigerator according to claim 1, characterized in that: The switch valve is a valve component of a three-way valve, and the valve component of the three-way valve includes a first outlet, a second outlet and an inlet. The condenser is connected to the refrigerating chamber evaporator through the inlet of the three-way valve and the first outlet of the three-way valve, and the condenser is connected to the freezing chamber evaporator through the inlet of the three-way valve and the second outlet of the three-way valve.

3. The refrigerator according to claim 2, characterized in that: It also includes a first throttling component and a second throttling component, wherein the first throttling component is arranged between the first outlet of the three-way valve and the inlet of the refrigerator compartment evaporator; the second throttling component is arranged between the second outlet of the three-way valve and the inlet of the freezer compartment evaporator.

4. The refrigerator according to claim 2, characterized in that: The utility model further comprises a filter, wherein the filter is arranged between the inlet of the three-way valve and the outlet of the condenser.

5. The refrigerator according to claim 1, characterized in that: It also includes a refrigerating fan corresponding to the refrigerating chamber evaporator, a freezing fan corresponding to the freezing chamber evaporator, and a condensing fan corresponding to the condenser.

6. A refrigerator control method, characterized in that: The refrigerator comprises: A double suction compressor, the double suction compressor comprising a first suction inlet, a second suction inlet and an exhaust port, the exhaust port being connected to the inlet of a condenser, the outlet of the condenser being connected to the inlet of the refrigerating chamber evaporator through a switch valve, the outlet of the refrigerating chamber evaporator being connected to the first suction inlet through a first return air pipe; the outlet of the condenser being also connected to the inlet of a freezing chamber evaporator, the outlet of the freezing chamber evaporator being connected to the second suction inlet through a second return air pipe; The control method comprises: Controlling the double suction compressor to operate so that the refrigerant performs heat exchange through the refrigerating chamber evaporator and the freezing chamber evaporator respectively; When the temperature of the refrigerating chamber is less than or equal to a first preset temperature, the switch valve is controlled to be closed, and the double-suction compressor is controlled to increase the rotation speed.

7. The refrigerator control method according to claim 6, characterized in that: The switch valve is a valve component of a three-way valve, the valve component of the three-way valve includes a first outlet, a second outlet and an inlet, the condenser is connected to the refrigerating chamber evaporator through the inlet of the three-way valve and the first outlet of the three-way valve, and the condenser is connected to the freezing chamber evaporator through the inlet of the three-way valve and the second outlet of the three-way valve; When the temperature of the refrigerating chamber is less than or equal to the first preset temperature, the switch valve is controlled to be closed, and the double suction compressor is controlled to increase the speed, including: When the temperature of the refrigerating chamber is less than or equal to the first preset temperature, the first outlet of the three-way valve is controlled to be closed, and the speed of the double-suction compressor is controlled to increase from the first speed to the second speed.

8. The refrigerator control method according to claim 6, characterized in that: The control method further comprises: When the temperature of the freezing chamber is less than or equal to the second preset temperature, and the temperature of the refrigerating chamber is less than the third preset temperature, the double suction compressor is controlled to stop.

9. The refrigerator control method according to claim 7, characterized in that: The control method further comprises: When the temperature of the freezing chamber is greater than the second preset temperature, and the temperature of the refrigerating chamber is greater than the third preset temperature, the double suction compressor is controlled to slow down to a third speed, and the first outlet of the three-way valve is controlled to open.

10. A controller, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the refrigerator control method as described in any one of claims 6 to 9 when executing the computer program.

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