Refrigerator and control method thereof

Abstract

According to the refrigerator and the control method thereof, a pump with the adjustable volume is introduced into a pure parallel refrigerating system, so that the inner volume of the refrigerating system is adjusted, pure parallel arrangement of the multi-system refrigerator can be achieved, and the requirement that the refrigerant filling amount requirements are not uniform during refrigerating of different chambers is met. Besides, by adjusting the volume of the pump, the refrigerating performance requirements of different chambers of the refrigerator under different operating conditions under the fixed refrigerant filling amount are met, invalid repeated heat exchange is prevented, and the refrigerator can operate in a more energy-saving mode.

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] A multi-system refrigerator includes at least two compartments: a refrigerator compartment and a freezer compartment, and at least two evaporators: a refrigeration evaporator and a freezing evaporator. Among them, the refrigeration evaporator acts on the refrigerator compartment, and the freezing evaporator acts on the freezing compartment. When the compressor is started, low-temperature refrigerant flows in the evaporator, thereby cooling the corresponding compartment. In the existing industry, a pure parallel system refrigerator is usually used, that is, the refrigeration evaporator and the freezing evaporator are connected in parallel to the refrigeration circuit. Since the volume of the refrigeration evaporator is much smaller than that of the freezing evaporator, there will be a problem of inconsistent refrigerant filling requirements when refrigerating different compartments, resulting in the following phenomena: if the amount of refrigerant is appropriate during refrigeration, when switching to freezing refrigeration, there will be problems such as insufficient refrigerant, reduced system flow, high evaporator outlet superheat, and poor freezing refrigeration; if the amount of refrigerant is appropriate during freezing refrigeration, when switching to refrigeration, there will be too much refrigerant, the outlet of the freezing evaporator is still a gas-liquid mixed refrigerant, and the compressor is prone to liquid shock and scrapping. Summary of the invention

[0003] The purpose of the embodiment of the present invention is to provide a refrigerator and a control method thereof. By introducing a volume-adjustable pump into a pure parallel refrigeration system, the internal volume of the refrigeration system is adjusted, thereby realizing a pure parallel setting of multi-system refrigerators and meeting the requirements of different refrigerant filling volume when refrigerating different compartments.

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

[0005] a box body, in which at least one storage chamber is formed, and the storage chamber includes at least a refrigerating chamber and a freezing chamber;

[0006] A refrigeration system for providing coldness for a refrigerator, the refrigeration system comprising a compressor, a condenser and an evaporator connected in sequence through pipelines; wherein a reversing valve for adjusting the flow direction of the refrigerant is provided at the inlet of the evaporator, and the evaporator comprises a refrigeration evaporator and a freezing evaporator connected in parallel;

[0007] A regulating pump, provided in the refrigeration system, for regulating the amount of refrigerant in the refrigeration system;

[0008] A controller, the controller being configured to:

[0009] When the refrigeration system is in a refrigeration mode, the reversing valve is controlled to be in a first state to control the refrigerant to flow to the refrigeration evaporator, and the volume of the regulating pump is adjusted to a first volume;

[0010] When the refrigeration system is in the freezing and cooling mode, the reversing valve is controlled to be in the second state to control the refrigerant to flow to the freezing evaporator, and the volume of the regulating pump is adjusted to a second volume; wherein the second volume is smaller than the first volume.

[0011] In the embodiment of the present invention, by introducing a volume-adjustable pump into a pure parallel refrigeration system, the internal volume of the refrigeration system is adjusted, so that a pure parallel setting of a multi-system refrigerator can be realized, and the requirements of different refrigerant filling volume requirements when refrigerating different compartments can be met. In addition, by adjusting the volume of the pump, the performance requirements of refrigeration of different compartments of the refrigerator under different operating conditions can be achieved under a fixed refrigerant filling volume, thereby preventing ineffective repeated heat exchange and making the refrigerator more energy-efficient.

[0012] As an improvement of the above solution, the regulating pump is arranged in the refrigeration branch where the refrigeration evaporator is located.

[0013] In the embodiment of the present invention, by setting the regulating pump on the refrigeration branch, the amount of refrigerant flowing into the refrigeration evaporator can be adjusted, so that during refrigeration, the amount of refrigerant can be reduced to avoid the problems of excessive refrigerant, gas-liquid mixed refrigerant at the outlet of the refrigeration evaporator, and the compressor being easily scrapped due to liquid shock; and during freezing and refrigeration, the amount of refrigerant can be increased to avoid the problems of insufficient refrigerant, reduced system flow, high superheat at the evaporator outlet, and poor freezing and refrigeration.

[0014] As an improvement of the above solution, the regulating pump is provided with a regulating device, and when the regulating device is located at a first position, the volume of the regulating pump is a first volume; when the regulating device is located at a second position, the volume of the regulating pump is a second volume; the controller is further configured as:

[0015] When the refrigeration system switches from a refrigeration mode to a freezing mode, the compressor is controlled to start, the reversing valve is controlled to switch to a second state, and the regulating device is controlled to move from a first position to a second position at a first speed;

[0016] When the refrigeration system switches from the freezing refrigeration mode to the cold storage refrigeration mode, the compressor is controlled to start, the reversing valve is controlled to switch to the first state, and the regulating device is controlled to move from the second position to the first position at a second speed.

[0017] In an embodiment of the present invention, a control method for adjusting devices in a compressor, a reversing valve and a regulating pump when switching refrigeration modes is provided. Through adjustment in the above method, the amount of refrigerant in the refrigeration system meets the requirements of the refrigeration mode.

[0018] As an improvement of the above solution, the first speed is proportional to the ambient temperature, and the second speed is proportional to the rotational speed of the compressor.

[0019] In an embodiment of the present invention, the regulating device moves at different speeds in order to reduce the impact on the system pressure when the regulating pump volume is adjusted, such as to avoid the liquid refrigerant in the refrigerated evaporator from being fully heat exchanged during inward pushing, resulting in compressed liquid shock, and the high-pressure liquid refrigerant from erupting and producing abnormal noise due to the instantaneous pressure reduction during outward pulling.

[0020] As an improvement of the above solution, the regulating pump is arranged between the reversing valve and the condenser.

[0021] In the embodiment of the present invention, by arranging the regulating pump between the reversing valve and the condenser, the amount of refrigerant flowing into the refrigeration evaporator and the freezing evaporator can be adjusted, so that during refrigeration, the amount of refrigerant can be reduced to avoid the problems of excessive refrigerant, gas-liquid mixed refrigerant at the outlet of the refrigeration evaporator, and the compressor being easily scrapped due to liquid shock; and during freezing, the amount of refrigerant can be increased to avoid the problems of insufficient refrigerant, reduced system flow, high superheat at the evaporator outlet, and poor freezing.

[0022] As an improvement of the above solution, the regulating pump is provided with a regulating device, and when the regulating device is located at a first position, the volume of the regulating pump is a first volume; when the regulating device is located at a second position, the volume of the regulating pump is a second volume; the controller is further configured as:

[0023] When the refrigeration system switches from the cold storage refrigeration mode to the freezing refrigeration mode, the compressor is controlled to stop, the reversing valve is controlled to be in a closed state, and the regulating device is controlled to move from the first position to the second position at a third speed; the reversing valve is controlled to switch from the closed state to the second state, and the compressor is controlled to start;

[0024] When the refrigeration system switches from a freezing refrigeration mode to a cold storage refrigeration mode, the compressor is controlled to switch to a first speed, the reversing valve is controlled to be in a closed state, and the regulating device is controlled to move from the second position to the first position at a fourth speed; the reversing valve is controlled to switch from a closed state to a first state, and the compressor is controlled to switch to a second speed.

[0025] In an embodiment of the present invention, a control method for the regulating device of the compressor, the reversing valve and the regulating pump when switching the refrigeration mode is provided. Since freezing refrigeration requires a larger amount of refrigerant, the volume of the regulating pump is smaller, so that more refrigerant flows into the freezing evaporator. After adjusting the reversing valve, the regulating device is adjusted to increase the amount of refrigerant in the refrigeration system to meet the freezing refrigeration demand. In addition, since refrigeration refrigeration requires a smaller amount of refrigerant, the volume of the regulating pump is larger, so that less refrigerant flows into the freezing evaporator. After adjusting the reversing valve, the regulating device is adjusted to reduce the amount of refrigerant in the refrigeration system to meet the refrigeration demand.

[0026] As an improvement of the above solution, the third speed is inversely proportional to the ambient temperature, and the fourth speed is directly proportional to the compressor rotation speed.

[0027] In an embodiment of the present invention, the regulating device moves at different speeds in order to reduce the impact on the system pressure when the regulating pump volume is adjusted, such as to avoid the liquid refrigerant in the refrigeration evaporator from being fully heat exchanged during inward pushing, resulting in compressed liquid shock, and the high-pressure liquid refrigerant from erupting and producing abnormal noise due to the instantaneous pressure reduction during outward pulling.

[0028] As an improvement of the above solution, the controller is further configured as follows:

[0029] When the refrigeration system is in a shutdown mode, the compressor is controlled to stop, and the reversing valve is controlled to switch to a closed state;

[0030] The adjusting device is controlled to move to a third position; wherein a third volume corresponding to the third position is smaller than the first volume.

[0031] In the embodiment of the present invention, when the refrigeration system is shut down, the reversing valve is closed, and the refrigerant is shut down and flows into the freezing evaporator and the refrigeration evaporator, and the high-pressure end and the low-pressure end are blocked to maintain the high-low pressure difference, which can prevent the compressor from consuming extra power to establish a high-low pressure balance when restarting. In addition, in order to make the heat dissipation during the shutdown stage more sufficient, when shutting down, the regulating device of the regulating pump is slowly pushed inward to reduce the volume of the regulating pump to suppress the decrease in condensation pressure, so that the refrigerant at the condenser end always maintains a higher condensation pressure and condensation temperature, that is, maintains a certain temperature difference with the environment, making the heat dissipation process easier.

[0032] As an improvement of the above solution, the controller is further configured as follows:

[0033] Get the ambient temperature;

[0034] A corresponding correction coefficient is obtained according to the ambient temperature, and values ​​of the first volume and the second volume are adjusted simultaneously according to the correction coefficient.

[0035] In an embodiment of the present invention, the amount of refrigerant required for the refrigeration cycle is related to the external ambient temperature. By adjusting the values ​​of the first volume and the second volume of the adjusting device according to the ambient temperature, precise control of the refrigeration capacity under different ambient temperatures and different modes can be achieved.

[0036] To achieve the above object, an embodiment of the present invention further provides a refrigerator control method, wherein the refrigerator refrigeration system comprises a compressor, a condenser and an evaporator connected in sequence through pipelines; wherein a reversing valve for adjusting the flow direction of the refrigerant is provided at the inlet of the evaporator, and the evaporator comprises a refrigeration evaporator and a freezing evaporator connected in parallel; the refrigerator is also provided with a regulating pump for adjusting the amount of the refrigerant; the method comprises:

[0037] When the refrigeration system is in a refrigeration mode, the reversing valve is controlled to be in a first state to control the refrigerant to flow to the refrigeration evaporator, and the volume of the regulating pump is adjusted to a first volume;

[0038] When the refrigeration system is in the freezing and cooling mode, the reversing valve is controlled to be in the second state to control the refrigerant to flow to the freezing evaporator, and the volume of the regulating pump is adjusted to a second volume; wherein the second volume is smaller than the first volume.

[0039] In the embodiment of the present invention, by introducing a volume-adjustable pump into a pure parallel refrigeration system, the internal volume of the refrigeration system is adjusted, so that a pure parallel setting of a multi-system refrigerator can be realized, and the requirements of different refrigerant filling volume requirements when refrigerating different compartments can be met. In addition, by adjusting the volume of the pump, the performance requirements of refrigeration of different compartments of the refrigerator under different operating conditions can be achieved under a fixed refrigerant filling volume, thereby preventing ineffective repeated heat exchange and making the refrigerator more energy-efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 is a schematic diagram of the external structure of a refrigerator provided by an embodiment of the present invention;

[0041] Figure 2 is a schematic diagram of the internal structure of a refrigerator provided by an embodiment of the present invention;

[0042] Figure 3 is a schematic structural diagram of a refrigeration system in a refrigerator provided by an embodiment of the present invention;

[0043] Figure 4 is a schematic structural diagram of a regulating pump provided by an embodiment of the present invention;

[0044] Figure 5 is a schematic diagram of a first position and a second position of a regulating pump provided by an embodiment of the present invention;

[0045] Figure 6 This is a schematic diagram of a first arrangement method of a regulating pump provided in an embodiment of the present invention;

[0046] Figure 7 Schematic diagram of a second arrangement of a regulating pump provided in an embodiment of the present invention;

[0047] Figure 8Schematic diagram of a third arrangement mode of a regulating pump provided in an embodiment of the present invention;

[0048] Fig. 9 is a first working flow diagram of a controller provided by an embodiment of the present invention;

[0049] Fig.10 is a second working flow diagram of the controller provided by an embodiment of the present invention;

[0050] Fig.11 is a third working flow diagram of the controller provided in an embodiment of the present invention;

[0051] Fig.12 is a fourth working flow diagram of the controller provided by an embodiment of the present invention;

[0052] Fig.13 is a fifth working flow chart of the controller provided by an embodiment of the present invention;

[0053] Fig.14 is a sixth working flow diagram of the controller provided by an embodiment of the present invention;

[0054] Fig.15 is a seventh working flow diagram of the controller provided by an embodiment of the present invention;

[0055] Fig.16 The present invention provides a flowchart of a refrigerator control method.

[0056] Among them, 100, refrigerator; 111 cold storage room; 112 freezer room; 1, compressor; 2, condenser; 3, drying filter; 4, reversing valve; 5, refrigeration evaporator; 6, freezing evaporator; 7, refrigeration capillary; 8, freezing capillary; 9 regulating pump. DETAILED DESCRIPTION

[0057] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0058] In the description of the present 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 the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0059] The terms "first", "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0060] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0061] See also Figure 1 , Figure 1 It is a schematic diagram of the external structure of a refrigerator 100 provided by an embodiment of the present invention. The refrigerator 100 of this embodiment is approximately rectangular in shape. The refrigerator includes a box body that defines a storage space and one or more door bodies arranged at the opening of the box body, wherein the door body includes a door body shell located outside the box body, a door body liner located inside the box body, an upper end cover, a lower end cover, and an insulation layer located between the door body shell, the door body liner, the upper end cover, and the lower end cover; usually, the insulation layer is filled with foam. The box body is provided with a chamber, wherein the chamber includes a component storage chamber for placing components in the refrigerator, such as a press cabin, etc., and also includes a storage space for storing food, etc.

[0062] See also Figure 2 , Figure 2 1 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 a refrigerating room 111 and a freezing room 112 according to different uses. They can also include a temperature-changing room, a vacuum drawer, a moisturizing drawer, etc. Each storage room corresponds to one or more door bodies, for example, Figure 2 The storage room at the upper part is provided with a double-opening 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.

[0063] See also Figure 3 , Figure 3A schematic diagram of the structure of a refrigeration system in a refrigerator 100 provided in an embodiment of the present invention, wherein the refrigeration system comprises a compressor 1, a condenser 2, a filter dryer 3, a reversing valve 4, a refrigeration evaporator 5, a freezing evaporator 6, a refrigeration capillary 7, a freezing capillary 8 and a gas-liquid separator (not shown in the figure). The refrigeration evaporator 5 and the freezing evaporator 6 are connected in parallel, and the reversing valve 4 is provided at the refrigerant inlet of the refrigeration evaporator 5 and the freezing evaporator 6 to adjust the flow direction of the refrigerant.

[0064] The working process of the refrigeration system includes a compression process, a condensation process, a throttling process and an evaporation process. The compression process is as follows: plug in the power cord of the refrigerator, and when the contacts of the thermostat are connected, the compressor 1 starts to work, and the low-temperature and low-pressure refrigerant is sucked into the compressor 1, compressed into a high-temperature and high-pressure superheated gas in the cylinder of the compressor 1, and then discharged into the condenser 2; the condensation process is as follows: the high-temperature and high-pressure refrigerant gas dissipates heat through the condenser 2, the temperature continues to drop, and is gradually cooled into a saturated vapor of normal temperature and high pressure, and further cooled into a saturated liquid, and the temperature no longer drops. The temperature at this time is called the condensation temperature, and the pressure of the refrigerant remains almost unchanged during the entire condensation process; the throttling process is as follows: the condensed refrigerant saturated liquid is filtered out of moisture and impurities by the drying filter 3 and then flows into the reversing valve 4. When there is a refrigeration demand in the refrigerating chamber, the refrigerant flows as follows: compressor 1→condenser 2→drying filter 3→reversing valve 4→refrigerating capillary 7→refrigerating evaporator 5→compressor 1; when there is a refrigeration demand in the freezing chamber, the refrigerant flows as follows: compressor 1→condenser 2→drying filter 3→reversing valve 4→frozen capillary 8→frozen evaporator 6→compressor 1. After the refrigerant passes through the refrigeration capillary 7 or the freezing capillary 8, it is throttled and depressurized, and the refrigerant becomes wet steam at room temperature and low pressure; the evaporation process is: the wet steam at room temperature and low pressure begins to absorb heat and vaporize in the refrigeration evaporator 5 or the freezing evaporator 6, which not only reduces the temperature of the evaporator 102 and its surroundings, but also turns the refrigerant into a low-temperature, low-pressure gas. The refrigerant coming out of the evaporator 102 passes through the gas-liquid separator and returns to the compressor 1 again, repeating the above process to transfer the heat in the refrigerator to the air outside the box, thereby achieving the purpose of refrigeration.

[0065] Furthermore, the reversing valve 4 has 4 working modes, as shown in Table 1. When the built-in coil of the reversing valve 4 moves to position 1, it meets the first state, at which time the refrigerated branch is open and the frozen branch is disconnected. When the built-in coil of the reversing valve 4 moves to position 2, it meets the second state, at which time the refrigerated branch is disconnected and the frozen branch is open. When the built-in coil of the reversing valve 4 moves to position 3, it meets the closed state, at which time the refrigerated branch and the frozen branch are both disconnected, and the refrigeration system is disconnected at this point. When the built-in coil of the reversing valve 4 moves to position 4, it meets the fully open state, at which time both the refrigerated branch and the frozen branch are open.

[0066] Table 1 Directional valve working mode

[0067] state Coil position refrigeration freezing First State 1 open close Second State 2 close open Closed state 3 close close Fully open 4 open open

[0068] Furthermore, in order to adjust the amount of refrigerant in the refrigeration system, the embodiment of the present invention adds a regulating pump 9 in the refrigeration system. Figure 4 , Figure 4 : is a schematic diagram of the structure of the regulating pump provided in an embodiment of the present invention, wherein the regulating pump 9 comprises a housing 91, a liquid storage tank 91A with adjustable volume, a regulating device 92, an inlet pipe 93 and an outlet pipe 94. The liquid storage tank 91A is used to store refrigerant, the regulating device 92 is used to adjust the volume of the liquid storage tank 91A, the regulating device 92 can be connected to a stepping motor, and the refrigerator controller adjusts the moving distance of the regulating device 92 by controlling the stepping motor, and the stepping motor drives the regulating device 92 by screw connection or gear meshing drive. The inlet pipe 93 and the outlet pipe 94 are connected with other pipelines of the refrigeration system to form a closed space. After the inlet pipe 93 flows into the refrigerant, due to the small diameter of the outlet pipe 94, a part of the refrigerant will be stored in the liquid storage tank 91A. As the regulating device 92 moves, the volume of the liquid storage tank 91A changes. When the volume of the liquid storage tank 91A becomes smaller, the amount of refrigerant flowing out of the outlet pipe 94 is larger due to the increase in pressure. When the volume of the liquid storage tank 91A becomes larger, the amount of refrigerant flowing out of the outlet pipe 94 is smaller due to the decrease in pressure.

[0069] Exemplarily, the regulating pump 9 is preset with a first position and a second position. When the regulating device 92 is located at the first position, the volume of the regulating pump 9 is the first volume; when the regulating device 92 is located at the second position, the volume of the regulating pump 9 is the second volume, see Figure 5 , Figure 5 It is a schematic diagram of the first position and the second position of the regulating pump 9 provided in an embodiment of the present invention. The second volume is smaller than the first volume. When the regulating device 92 moves to the second position, the volume of the liquid storage tank 91A becomes smaller. Due to the increase in pressure, the amount of refrigerant flowing out of the outlet pipe 94 is larger; when the regulating device 92 moves to the first position, the volume of the liquid storage tank 91A becomes larger. Due to the decrease in pressure, the amount of refrigerant flowing out of the outlet pipe 94 is smaller.

[0070] Specifically, the embodiment of the present invention provides two ways of arranging the regulating pump 9. The first way is that the regulating pump 9 is arranged on the refrigeration branch, and the second way is that the regulating pump 9 is arranged on the common pipeline.

[0071] In the first embodiment, the regulating pump 9 is arranged in the refrigeration branch where the refrigeration evaporator 5 is located. There are two arrangement modes:

[0072] 1) Connect the regulating pump 9 in series with the path of the refrigeration evaporator 5 with a smaller volume, such as Figure 6 As shown, the regulating pump 9 is arranged at the outlet of the refrigeration evaporator 5 in the refrigeration branch;

[0073] 2) Connect the regulating pump 9 in series with the larger volume of the refrigeration evaporator 5, such as Figure 7 As shown, the regulating pump 9 is arranged after the reversing valve 5 and before the refrigeration capillary 7; since the refrigerant is in a gas-liquid two-phase state at the inlet of the refrigeration evaporator 5 and in a superheated gas state at the outlet, and the pressure at the evaporation end is low, the density of the refrigerant here is relatively small. In other words, compared with the high-pressure end, to accommodate the same mass of refrigerant, the low-pressure end needs to be equipped with a regulating pump with a larger internal volume. On the other hand, the refrigeration evaporator 5 is located in the refrigerator storage room, and placing the regulating pump 9 here will waste food storage space. Therefore, this arrangement allows the regulating pump 9 to be installed in the compressor compartment without occupying the storage space in the refrigerator.

[0074] In a second embodiment, the regulating pump 9 is arranged between the reversing valve 4 and the condenser 2. Figure 8 As shown, the regulating pump 9 is arranged between the reversing valve 4 and the drying filter 3, which can give full play to the regulating function of the adjustable pump in the refrigeration system, allocate the refrigerant of the cold storage refrigeration circuit and the freezing refrigeration circuit, and adapt to different refrigerator operating conditions.

[0075] In the embodiment of the present invention, by setting the regulating pump 9 on the refrigeration branch or setting the regulating pump 9 between the reversing valve 4 and the condenser 2, the amount of refrigerant flowing into the refrigeration evaporator 5 can be adjusted, so that during refrigeration, the amount of refrigerant can be reduced to avoid the problems of excessive refrigerant, gas-liquid mixed refrigerant at the outlet of the refrigeration evaporator, and the compressor being easily scrapped due to liquid shock; and during freezing and refrigeration, the amount of refrigerant can be increased to avoid the problems of insufficient refrigerant, reduced system flow, high superheat at the evaporator outlet, and poor freezing and refrigeration.

[0076] Specifically, the controller in the refrigerator is used to control at least the reversing valve, the compressor and the regulating pump, and the controller is configured to: when the refrigeration system is in a refrigeration mode, control the reversing valve to a first state to control the refrigerant to flow to the refrigeration evaporator, and adjust the volume of the regulating pump to a first volume;

[0077] When the refrigeration system is in the freezing and cooling mode, the reversing valve is controlled to be in the second state to control the refrigerant to flow to the freezing evaporator, and the volume of the regulating pump is adjusted to a second volume; wherein the second volume is smaller than the first volume.

[0078] For example, see Fig. 9 , Fig. 9It is a first working flow chart of the controller provided in an embodiment of the present invention, and the controller is configured to execute steps S11 to S17. In step S11, the operating parameter may be the real-time refrigeration temperature of the refrigerating chamber and / or the real-time freezing temperature of the freezing chamber, and the refrigeration mode of the refrigerator is determined by the real-time refrigeration temperature and / or the real-time freezing temperature. In steps S12 to S14, when refrigeration is performed, the reversing valve switches to the first state, at which time the refrigeration branch is connected and the freezing branch is disconnected. Since the amount of refrigerant required for refrigeration is small, the volume of the regulating pump is the first volume, and the regulating device is located in the first position. In steps S15 to S17, when freezing is performed, the reversing valve switches to the second state, at which time the refrigeration branch is disconnected and the freezing branch is connected. Since the amount of refrigerant required for freezing is large, the volume of the regulating pump is the second volume, and the regulating device is located in the second position.

[0079] In the embodiment of the present invention, by introducing a volume-adjustable pump into a pure parallel refrigeration system, the internal volume of the refrigeration system is adjusted, so that a pure parallel setting of a multi-system refrigerator can be realized, and the requirements of different refrigerant filling volume requirements when refrigerating different compartments can be met. In addition, by adjusting the volume of the pump, the performance requirements of refrigeration of different compartments of the refrigerator under different operating conditions can be achieved under a fixed refrigerant filling volume, thereby preventing ineffective repeated heat exchange and making the refrigerator more energy-efficient.

[0080] It is worth noting that when the refrigeration system switches from the cold storage refrigeration mode to the freezing refrigeration mode, or when the refrigeration system switches from the freezing refrigeration mode to the cold storage refrigeration mode, in order to prevent the impact on the system pressure when the regulating pump volume is adjusted (such as the liquid refrigerant in the evaporator is not fully heat exchanged during inward pushing, resulting in compressed liquid shock, and the high-pressure liquid refrigerant erupts and produces abnormal noise due to the instantaneous pressure reduction during outward pulling), when the refrigeration mode is switched, it is necessary to coordinate the start and stop of the compressor and the switching of the reversing valve to make the pressure in various parts of the system slowly transition. At this time, the controller controls the working mode of the reversing valve, the compressor and the regulating pump according to the refrigeration mode switching method. The embodiments of the present invention provide corresponding control methods for the reversing valve, the compressor and the regulating pump regulating device when the refrigeration system switches the mode (switching the freezing refrigeration mode to the cold storage refrigeration mode, or switching the cold storage refrigeration mode to the freezing refrigeration mode) for the above two regulating pump settings, which are described in turn as follows.

[0081] Specifically, when the regulating pump is arranged in the refrigeration branch where the refrigeration evaporator is located, the controller is also configured to: when the refrigeration system is switched from a refrigeration mode to a freezing mode, control the compressor to start up, control the reversing valve to switch to a second state, and control the regulating device to move from a first position to a second position at a first speed; when the refrigeration system is switched from a freezing mode to a refrigeration mode, control the compressor to start up, control the reversing valve to switch to a first state, and control the regulating device to move from a second position to a first position at a second speed.

[0082] For example, see Fig.10 , Fig.10 This is the second working flow diagram of the controller provided by an embodiment of the present invention, and the controller is configured to execute steps S1911 to S1914. When refrigeration is switched from cold storage to freezing, a large amount of refrigerant is required in the refrigeration system. At this time, the refrigerant stored in the regulating pump needs to be released into the system to participate in the circulation flow. The compressor is controlled to start or remain on, and at the same time, the reversing valve is switched from the first state to the second state. At this time, the refrigeration branch is disconnected and the freezing branch is connected. Wait for a first time (such as the first time is 1min-3min), and slowly push the regulating device of the regulating pump inward at a first speed to reduce the space inside the pump until the regulating device moves to the second position. Among them, the first speed is directly proportional to the ambient temperature. The higher the ambient temperature, the faster the speed.

[0083] For example, see Fig.11 , Fig.11 It is the third working flow chart of the controller provided by the embodiment of the present invention, and the controller is configured to execute steps S1921 to S1924. When the freezing refrigeration is switched to the cold storage refrigeration, the excess refrigerant in the system pipeline needs to be recovered and stored in the regulating pump. At this time, the compressor is turned on or remains on, and the reversing valve is switched from the second state to the first state, and waits for the second time (such as the second time is 1min-3min), and the regulating device of the regulating pump is slowly pulled outward at the second speed to reduce the space inside the pump until the regulating device moves to the first position. Among them, the second speed is proportional to the compressor speed at this time. The higher the compressor speed, the faster the speed.

[0084] In an embodiment of the present invention, a control method for the compressor, the reversing valve and the regulating pump regulating device is provided when the refrigeration mode is switched. Through the adjustment of the above method, the amount of refrigerant in the refrigeration system meets the requirements of the refrigeration mode. In addition, waiting for a period of time is to allow the pressures at the high-pressure end and the low-pressure end of the compressor to be slightly balanced, so as to prevent the compressor from starting up due to excessive torque due to excessive high and low pressure differences when the compressor is started. In addition, the regulating device moves at the first speed and the second speed in order to reduce the impact on the system pressure when the regulating pump volume is adjusted, such as avoiding the liquid refrigerant in the refrigerated evaporator from being fully heat exchanged during inward pushing, resulting in compressed liquid shock, and the high-pressure liquid refrigerant from erupting and producing abnormal noise due to the instantaneous pressure reduction during outward pulling.

[0085] Specifically, when the regulating pump is arranged between the reversing valve and the condenser, the controller is also configured to: when the refrigeration system switches from a refrigeration mode to a freezing mode, control the compressor to stop, control the reversing valve to be in a closed state, and control the regulating device to move from the first position to the second position at a third speed; control the reversing valve to switch from a closed state to a second state, and control the compressor to start up.

[0086] For example, see Fig.12 , Fig.12 It is the fourth working flow chart of the controller provided by the embodiment of the present invention. The controller is configured to execute steps S1931 to S1936. When the refrigeration system switches from cold storage to freezing, the compressor is first controlled to stop and the reversing valve is placed in a fully closed state to isolate the refrigerant in the high-pressure condenser and the low-pressure evaporator. The regulating device of the regulating pump is slowly controlled to move to the second position at a third speed to push the refrigerant in the regulating pump into the condenser. After waiting for the third time (such as 30s-120s), the reversing valve is controlled to the second state. At this time, the refrigeration branch is disconnected and the freezing branch is connected. After waiting for the fourth time (such as 30s-120s), the compressor is turned on, so that the refrigerant circulates through the freezing evaporator and switches to freezing. Here, the third speed of the slowly adjusted regulating device is inversely proportional to the ambient temperature. When the ambient temperature is higher, the refrigerant pressure inside the condenser is higher and the more difficult it is to be compressed. Therefore, when the ambient temperature is higher, the speed of the regulating device is slower.

[0087] In an embodiment of the present invention, a control method for the compressor, the reversing valve and the regulating device of the regulating pump is provided when refrigeration is switched from cold storage to freezing refrigeration. Since freezing refrigeration requires a large amount of refrigerant, the volume of the regulating pump is small, so that more refrigerant flows into the freezing evaporator. After adjusting the reversing valve, wait for a period of time and then adjust the regulating device, thereby increasing the amount of refrigerant in the refrigeration system to meet the freezing refrigeration needs. In addition, waiting for a period of time is to allow the pressure at the high-pressure end and the low-pressure end of the compressor to be slightly balanced, so as to prevent the compressor from starting due to excessive torque due to excessive high and low pressure difference when the compressor is started. In addition, the regulating device moves at the third speed to reduce the impact on the system pressure when the regulating pump volume is adjusted, such as avoiding the liquid refrigerant in the freezing evaporator from being fully heat exchanged during internal push, resulting in compressed liquid shock, and the high-pressure liquid refrigerant from erupting and producing abnormal noise due to the instantaneous pressure reduction during external pull.

[0088] Specifically, when the regulating pump is arranged between the reversing valve and the condenser, the controller is also configured to: when the refrigeration system is switched from a freezing refrigeration mode to a refrigeration mode, control the compressor to switch to a first speed, control the reversing valve to be in a closed state, and control the regulating device to move from the second position to the first position at a fourth speed; control the reversing valve to switch from a closed state to a first state, and control the compressor to switch to a second speed.

[0089] For example, see Fig.13 , Fig.13 It is the fifth working flow chart of the controller provided by the embodiment of the present invention, and the controller is configured to execute steps S1941 to S1944. The second speed is greater than the first speed. When switching from freezing and refrigeration to refrigeration and refrigeration, the reversing valve is placed in a closed state, and the compressor is switched to the first speed (low-speed operation). Under the suction force of the compressor, the refrigerant migrates from the low-pressure evaporator through the compressor to the high-pressure condenser, and the regulating device of the regulating pump is slowly pulled out to the first position. After waiting for the fifth time (such as 30s-120s), the reversing valve is placed in the first state. At this time, the refrigeration branch is open and the freezing branch is disconnected, and the compressor is switched to the second speed (high-speed operation). The fourth speed is proportional to the compressor speed. The lower the compressor speed, the slower the movement speed of the regulating device.

[0090] In an embodiment of the present invention, a control method for the regulating device of the compressor, the reversing valve and the regulating pump when switching from freezing refrigeration to cold storage refrigeration is provided. Since cold storage refrigeration requires less refrigerant, the volume of the regulating pump is larger, so that less refrigerant flows into the freezing evaporator. After adjusting the reversing valve, wait for a period of time and then adjust the regulating device, thereby reducing the amount of refrigerant in the refrigeration system to meet the cold storage refrigeration needs. In addition, waiting for a period of time is to allow the pressure at the high-pressure end and the low-pressure end of the compressor to be slightly balanced, so as to prevent the compressor from starting due to excessive torque due to excessive high and low pressure difference when the compressor is started. In addition, the regulating device moves at the fourth speed to reduce the impact on the system pressure when the regulating pump volume is adjusted, such as avoiding the liquid refrigerant in the cold storage evaporator from being fully heat exchanged during inward pushing, resulting in compressed liquid shock, and the high-pressure liquid refrigerant from erupting and producing abnormal noise due to the instantaneous pressure reduction during outward pulling.

[0091] Specifically, when the regulating pump is arranged between the reversing valve and the condenser, the controller is also configured to: when the refrigeration system is in shutdown mode, control the compressor to stop, and control the reversing valve to switch to a closed state; control the regulating device to move to a third position; wherein the third volume corresponding to the third position is smaller than the first volume.

[0092] For example, see Fig.14 , Fig.14 It is the sixth working flow chart of the controller provided by an embodiment of the present invention. After executing step S11, the controller is also configured to execute steps S21 to S23. When the refrigeration and freezing both meet the set temperature and stop refrigeration, the compressor is turned off and the reversing valve is placed in a fully closed state (at the same time as the compressor is shut down). At this time, the high-pressure end and the low-pressure end are blocked, and the high and low pressure differences are maintained, which can prevent the compressor from consuming extra power to establish a high and low pressure balance when restarting. During the shutdown process, since the refrigerant temperature in the condenser is higher than the ambient temperature, the high-pressure refrigerant in the condenser dissipates heat to the environment, and the temperature and pressure gradually decrease until they are close to the ambient temperature. In order to make the heat dissipation more sufficient during the shutdown stage, during the shutdown, the regulating device of the regulating pump is slowly pushed inward at the fifth speed until it reaches the third position and stops, thereby suppressing the reduction of the condensation pressure, so that the refrigerant at the condenser end always maintains a higher condensation pressure and condensation temperature. Among them, the fifth speed is proportional to the ambient temperature. The higher the ambient temperature, the slower the action speed of the regulating device.

[0093] In the embodiment of the present invention, when the refrigeration system is shut down, the reversing valve is fully closed, and the high-pressure end and the low-pressure end are blocked at this time, maintaining the high-low pressure difference, which can prevent the compressor from consuming extra power to establish a high-low pressure balance when restarting. In addition, in order to make the heat dissipation more sufficient during the shutdown stage, when shutting down, the regulating device of the regulating pump is slowly pushed inward to suppress the decrease of the condensing pressure, so that the refrigerant at the condenser end always maintains a higher condensing pressure and condensing temperature, that is, maintains a certain temperature difference with the environment, making the heat dissipation process easier.

[0094] Specifically, when the regulating pump is arranged between the reversing valve and the condenser, the controller is also configured to: when the refrigeration system is in the start-up mode, keep the reversing valve in a closed state; according to the operating mode of the refrigeration system, control the regulating device to move to the first position or the second position at a sixth speed, start the compressor, and control the reversing valve to the first state or the second state.

[0095] For example, see Fig.15 , Fig.15 is the seventh working flow chart of the controller provided by the embodiment of the present invention. After executing step S11, the controller is further configured to execute steps S31 to S33. When any of the refrigeration or freezing chambers requires refrigeration, the reversing valve is kept in a closed state, and the regulating device of the regulating pump is slowly pulled outward until it reaches the first position or the second position. Then the compressor is started, and the reversing valve is switched to open the corresponding refrigeration branch.

[0096] In the embodiment of the present invention, the compressor is started slowly when it is turned on in order to prevent the impact on the system pressure when the pump capacity is adjusted, thereby maintaining the normal operation of the refrigeration system and increasing the service life of the compressor.

[0097] It is worth noting that the above-mentioned regulating device can be a piston, regulating rod or other device. In addition to being controlled according to the ambient temperature / compressor speed, the first speed to the sixth speed can also be taken according to empirical values. The staff can pre-set these speed values ​​before the refrigerator leaves the factory. In addition, the above-mentioned control method is applicable to fixed working conditions, that is, the operating conditions of the refrigerator refrigeration system with constant ambient temperature. When the external ambient temperature changes, the regulating pump can also adjust the amount of refrigerant in the entire system so that the system pipeline is filled with refrigerant under various operating conditions to ensure the continuity of flow and the efficiency of system operation. The amount of refrigerant required for the refrigeration cycle is related to the external ambient temperature. The higher the ambient temperature, the more refrigerant filling is required. This is because the refrigerant in the system mainly exists in the evaporator and condenser. For the evaporator side, the temperature of each compartment of the refrigerator is controlled by the user setting, so the density of the refrigerant on the evaporator side hardly changes with the external environment. When the external environment temperature rises, the refrigerant pressure on the condenser side increases. Since the density of the gas phase refrigerant increases with the increase of pressure, and the density of the liquid phase refrigerant remains almost unchanged with the pressure, when the ambient temperature rises, the demand for refrigerant in the condenser increases. If the refrigerant filling amount is insufficient at this time, the condensation end cannot reach the required high pressure, and the heat dissipation of the condenser is reduced, resulting in poor refrigeration capacity of the refrigerator. This is also the main reason why many refrigerators cannot maintain low internal temperatures at high ambient temperatures. When the refrigerator leaves the factory, the refrigeration system is a closed space, and the refrigerant filling amount is a certain value. It is impossible to adaptively add or discharge it according to the changing working conditions of the outside world during actual operation. In view of the above problems, the present invention proposes a solution, which uses a regulating pump as a liquid reservoir and a pressure regulator to cope with changes in ambient temperature.

[0098] Specifically, the controller is further configured to: obtain the ambient temperature; obtain a corresponding correction coefficient according to the ambient temperature, and simultaneously adjust the values ​​of the first volume and the second volume according to the correction coefficient.

[0099] Exemplarily, the first position (corresponding to the numerical change of the first volume) and the second position (corresponding to the numerical change of the second volume) of the regulating device of the regulating pump are related to the external ambient temperature. The corresponding correction coefficient is obtained through the ambient temperature, and then a correction coefficient related to the ambient temperature is added to the value of the first position or the second position. There are the following two situations:

[0100] 1) When the ambient temperature is low, such as when the ambient temperature is lower than the preset low temperature threshold, a positive value is superimposed on the values ​​of the first position and the second position, so that the adjusted first volume is greater than the first volume before adjustment. Similarly, the adjusted second volume is greater than the second volume before adjustment. At this time, the amount of refrigerant required in the refrigeration system is relatively small, and the regulating device of the regulating pump is pulled outward to increase the internal volume of the pump. The excess refrigerant that does not need to participate in the circulation can be dynamically stored in the regulating pump. Due to the adjustment of the pump, the internal volume of the system increases, and the exhaust pressure is reduced at this time, and the power consumption of the compressor is also reduced, so that the system can be operated in an energy-saving manner.

[0101] 2) When the external ambient temperature rises, such as when the ambient temperature is higher than the preset high temperature threshold, a negative value is superimposed on the values ​​of the first position and the second position, so that the adjusted first volume is smaller than the first volume before adjustment. Similarly, the adjusted second volume is smaller than the second volume before adjustment. The amount of refrigerant required in the refrigeration system increases, and the regulating device of the regulating pump is pushed inward, so that the remaining refrigerant in the pump is pushed into the refrigeration cycle to participate in flow heat exchange. As the internal volume of the pump decreases, the internal volume of the system decreases, the exhaust pressure increases, and the condensation temperature increases. At this time, the temperature difference between the condenser and the environment increases, which is conducive to the outward heat dissipation of condensation, and the maximum refrigeration capacity of the system is improved.

[0102] In an embodiment of the present invention, the amount of refrigerant required for the refrigeration cycle is related to the external ambient temperature. By adjusting the values ​​of the first volume and the second volume of the adjustment device by the ambient temperature, precise control of the refrigeration capacity under different ambient temperatures and different modes can be achieved.

[0103] See also Fig.16 , Fig.16 The present invention provides a flowchart of a refrigerator control method provided by an embodiment of the present invention. The refrigerator control method is implemented by a controller. The refrigerator refrigeration system includes a compressor, a condenser and an evaporator connected in sequence through pipelines. A reversing valve for adjusting the flow direction of the refrigerant is provided at the inlet of the evaporator. The evaporator includes a refrigeration evaporator and a freezing evaporator connected in parallel. The refrigerator is also provided with a regulating pump for adjusting the amount of the refrigerant. The method includes:

[0104] S1. When the refrigeration system is in a refrigeration mode, the reversing valve is controlled to be in a first state to control the refrigerant to flow to the refrigeration evaporator, and the volume of the regulating pump is adjusted to a first volume;

[0105] S2. When the refrigeration system is in the freezing and cooling mode, the reversing valve is controlled to be in the second state to control the refrigerant to flow to the freezing evaporator, and the volume of the regulating pump is adjusted to a second volume; wherein the second volume is smaller than the first volume.

[0106] Specifically, the regulating pump is provided with a regulating device, and when the regulating device is located at a first position, the volume of the regulating pump is a first volume; when the regulating device is located at a second position, the volume of the regulating pump is a second volume.

[0107] Specifically, the regulating pump is arranged in the refrigeration branch where the refrigeration evaporator is located.

[0108] Specifically, the method further includes:

[0109] When the refrigeration system switches from a refrigeration mode to a freezing mode, the compressor is controlled to start, the reversing valve is controlled to switch to a second state, and the regulating device is controlled to move from a first position to a second position at a first speed;

[0110] When the refrigeration system switches from the freezing refrigeration mode to the cold storage refrigeration mode, the compressor is controlled to start, the reversing valve is controlled to switch to the first state, and the regulating device is controlled to move from the second position to the first position at a second speed.

[0111] Specifically, the first speed is proportional to the ambient temperature, and the second speed is proportional to the rotation speed of the compressor.

[0112] Specifically, the regulating pump is arranged between the reversing valve and the condenser.

[0113] Specifically, the method further includes:

[0114] When the refrigeration system switches from the cold storage refrigeration mode to the freezing refrigeration mode, the compressor is controlled to stop, the reversing valve is controlled to be in a closed state, and the regulating device is controlled to move from the first position to the second position at a third speed; the reversing valve is controlled to switch from the closed state to the second state, and the compressor is controlled to start;

[0115] When the refrigeration system switches from a freezing refrigeration mode to a cold storage refrigeration mode, the compressor is controlled to switch to a first speed, the reversing valve is controlled to be in a closed state, and the regulating device is controlled to move from the second position to the first position at a fourth speed; the reversing valve is controlled to switch from a closed state to a first state, and the compressor is controlled to switch to a second speed.

[0116] Specifically, the third speed is inversely proportional to the ambient temperature, and the fourth speed is directly proportional to the compressor rotation speed.

[0117] Specifically, the method further includes:

[0118] When the refrigeration system is in a shutdown mode, the compressor is controlled to stop, and the reversing valve is controlled to switch to a closed state;

[0119] The adjusting device is controlled to move to a third position; wherein a third volume corresponding to the third position is smaller than the first volume.

[0120] Specifically, the method further includes:

[0121] Get the ambient temperature;

[0122] A corresponding correction coefficient is obtained according to the ambient temperature, and values ​​of the first volume and the second volume are adjusted simultaneously according to the correction coefficient.

[0123] In the embodiment of the present invention, by introducing a volume-adjustable pump into a pure parallel refrigeration system, the internal volume of the refrigeration system is adjusted, so that a pure parallel setting of a multi-system refrigerator can be realized, and the requirements of different refrigerant filling volume requirements when refrigerating different compartments can be met. In addition, by adjusting the volume of the pump, the performance requirements of refrigeration of different compartments of the refrigerator under different operating conditions can be achieved under a fixed refrigerant filling volume, thereby preventing ineffective repeated heat exchange and making the refrigerator more energy-efficient.

[0124] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle 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: a box body, in which at least one storage chamber is formed, and the storage chamber includes at least a refrigerating chamber and a freezing chamber; A refrigeration system for providing coldness for a refrigerator, the refrigeration system comprising a compressor, a condenser and an evaporator connected in sequence through pipelines; wherein a reversing valve for adjusting the flow direction of the refrigerant is provided at the inlet of the evaporator, and the evaporator comprises a refrigeration evaporator and a freezing evaporator connected in parallel; A regulating pump, provided in the refrigeration system, for regulating the amount of refrigerant in the refrigeration system; A controller, the controller being configured to: When the refrigeration system is in a refrigeration mode, the reversing valve is controlled to be in a first state to control the refrigerant to flow to the refrigeration evaporator, and the volume of the regulating pump is adjusted to a first volume; When the refrigeration system is in the freezing and cooling mode, the reversing valve is controlled to be in the second state to control the refrigerant to flow to the freezing evaporator, and the volume of the regulating pump is adjusted to a second volume; wherein the second volume is smaller than the first volume.

2. The refrigerator according to claim 1, characterized in that: The regulating pump is arranged in the refrigeration branch where the refrigeration evaporator is located.

3. The refrigerator according to claim 2, characterized in that: The regulating pump is provided with a regulating device. When the regulating device is located at a first position, the volume of the regulating pump is a first volume; when the regulating device is located at a second position, the volume of the regulating pump is a second volume; the controller is further configured as: When the refrigeration system switches from a refrigeration mode to a freezing mode, the compressor is controlled to start, the reversing valve is controlled to switch to a second state, and the regulating device is controlled to move from a first position to a second position at a first speed; When the refrigeration system switches from the freezing refrigeration mode to the cold storage refrigeration mode, the compressor is controlled to start, the reversing valve is controlled to switch to the first state, and the regulating device is controlled to move from the second position to the first position at a second speed.

4. The refrigerator according to claim 3, characterized in that: The first speed is proportional to the ambient temperature, and the second speed is proportional to the rotation speed of the compressor.

5. The refrigerator according to claim 1, characterized in that: The regulating pump is arranged between the reversing valve and the condenser.

6. The refrigerator according to claim 5, characterized in that: The regulating pump is provided with a regulating device. When the regulating device is located at a first position, the volume of the regulating pump is a first volume; when the regulating device is located at a second position, the volume of the regulating pump is a second volume; the controller is further configured as: When the refrigeration system switches from the cold storage refrigeration mode to the freezing refrigeration mode, the compressor is controlled to stop, the reversing valve is controlled to be in a closed state, and the regulating device is controlled to move from the first position to the second position at a third speed; the reversing valve is controlled to switch from the closed state to the second state, and the compressor is controlled to start; When the refrigeration system switches from a freezing refrigeration mode to a cold storage refrigeration mode, the compressor is controlled to switch to a first speed, the reversing valve is controlled to be in a closed state, and the regulating device is controlled to move from the second position to the first position at a fourth speed; the reversing valve is controlled to switch from a closed state to a first state, and the compressor is controlled to switch to a second speed.

7. The refrigerator according to claim 6, characterized in that The third speed is inversely proportional to the ambient temperature, and the fourth speed is directly proportional to the compressor rotation speed.

8. The refrigerator according to claim 5, characterized in that The controller is also configured to: When the refrigeration system is in a shutdown mode, the compressor is controlled to stop, and the reversing valve is controlled to switch to a closed state; The adjusting device is controlled to move to a third position; wherein a third volume corresponding to the third position is smaller than the first volume.

9. The refrigerator according to claim 1, characterized in that: The controller is also configured to: Get the ambient temperature; A corresponding correction coefficient is obtained according to the ambient temperature, and values ​​of the first volume and the second volume are adjusted simultaneously according to the correction coefficient.

10. A refrigerator control method, characterized in that: The refrigeration system in the refrigerator includes a compressor, a condenser and an evaporator connected in sequence through pipelines; wherein a reversing valve for adjusting the flow direction of the refrigerant is provided at the inlet of the evaporator, and the evaporator includes a refrigeration evaporator and a freezing evaporator connected in parallel; the refrigerator is also provided with a regulating pump for adjusting the amount of the refrigerant; the method includes: When the refrigeration system is in a refrigeration mode, the reversing valve is controlled to be in a first state to control the refrigerant to flow to the refrigeration evaporator, and the volume of the regulating pump is adjusted to a first volume; When the refrigeration system is in the freezing and cooling mode, the reversing valve is controlled to be in the second state to control the refrigerant to flow to the freezing evaporator, and the volume of the regulating pump is adjusted to a second volume; wherein the second volume is smaller than the first volume.

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