Refrigerator energy-saving refrigerating system and control method

Abstract

The invention provides a refrigerator energy-saving refrigerating system and a control method. A compressor of the system is sequentially connected with a condenser, an anti-condensation pipe, a filter, an electric valve, a capillary tube set and an evaporator set in the outlet direction, and an outlet of the evaporator set is connected with an inlet of the compressor; the controller is electrically connected with the compressor and the electric valve. The electric valve is provided with a first inlet, a second inlet and a first outlet; the first inlet is communicated with the anti-condensation pipe through a liquid inlet pipe; the first outlet is communicated with the capillary tube group through a first liquid outlet tube; the second inlet is communicated with one end of a bypass pipe through a bypass air inlet pipe, and the other end of the bypass pipe is connected between the condenser and the anti-condensation pipe; the first inlet, the second inlet and the first outlet of the electric valve are controlled to be opened and closed according to the environment humidity of the refrigerator and the control instruction for switching the state of the refrigerating system, so that the problem of energy consumption caused by too high temperature of the anti-condensation pipe is solved.

Description

Technical Field

[0001] This application relates to the technical field of refrigerators, and particularly to an energy-saving refrigeration system and control method for a refrigerator. Background Art

[0002] As a necessity in modern life, the refrigeration system of a refrigerator generally adopts a vapor compression cycle, and realizes refrigeration of the refrigerator through the coordinated action of components such as a compressor, a condenser, and an evaporator. In a humid environment, condensation is likely to form near the refrigerator door seal due to the temperature difference between the inside and outside, seriously affecting the user experience. In the traditional design scheme, an anti-condensation pipe is arranged at the joint of the low-temperature compartment and the door seal, and the waste heat of the high-temperature refrigerant is used to locally heat the area prone to condensation to prevent condensation. However, this scheme has significant defects: the heating power of the anti-condensation pipe is fixed and cannot be dynamically adjusted according to the ambient humidity, resulting in a large heat load and high energy consumption of the refrigerator.

[0003] In the related art, the flow direction of the refrigerant is controlled by a three-way solenoid valve with one inlet and two outlets. When a low humidity signal is detected, the refrigerant supply to the anti-condensation pipe is cut off to reduce the heat transfer to the inner side of the box body; when the high humidity environment resumes, the anti-condensation pipe works normally.

[0004] However, although this technology can reduce the heat load of the box body and the energy consumption of the refrigerator to a certain extent, its three-way valve can only realize the on-off control of the refrigerant in the anti-condensation pipe circuit, lacking the integrated design of the refrigerant shunt function. On the one hand, it cannot realize the free distribution of the refrigerant to the evaporator group; on the other hand, in the compressor shutdown stage of the traditional refrigeration system, the hot refrigerant in the condenser migrates to the evaporator, and the system pressure needs to be rebuilt when restarting, resulting in additional energy loss. These two problems are particularly prominent under the working conditions of frequent start-stop and ordinary ambient temperature, becoming the key bottleneck restricting the improvement of refrigerator energy efficiency. Summary of the Invention

[0005] This application provides an energy-saving refrigeration system and control method for a refrigerator to solve the problem of energy consumption caused by too high temperature of the anti-condensation pipe.

[0006] The first aspect of this application provides an energy-saving refrigeration system for a refrigerator, including: a controller, a compressor, a condenser, an anti-condensation pipe, a filter, an electric valve, a capillary tube group, and an evaporator group;

[0007] The compressor is sequentially connected to the condenser, the anti-condensation pipe, the filter, the electric valve, the capillary tube group, and the evaporator group along the outlet direction of the compressor, and the outlet of the evaporator group is connected to the inlet of the compressor; the controller is electrically connected to the compressor and the electric valve respectively;

[0008] The electric valve is provided with a first inlet, a second inlet and a first outlet; the first inlet is communicated with the anti-condensation pipe through a liquid inlet pipe; the first outlet is communicated with the capillary tube group through a first liquid outlet pipe; the second inlet is communicated with one end of a bypass pipe through a bypass liquid inlet pipe, and the other end of the bypass pipe is connected to between the condenser and the anti-condensation pipe through a three-way pipe;

[0009] The controller is configured to:

[0010] According to the humidity of the refrigerator environment and the control instruction for switching the refrigeration system state, control the opening and closing of the first inlet, the second inlet and the first outlet of the electric valve;

[0011] The refrigeration system states include a full-closed state of the anti-condensation pipe, a shunt state of the anti-condensation pipe, a full-open state of the anti-condensation pipe, and a pressure-holding state of the condenser.

[0012] The electric valve in the energy-saving refrigeration system of the refrigerator adopts a dual-inlet structure design to adapt to various humidity environments. By controlling the electric valve through the controller, the flow rate of the refrigerant flowing through the anti-condensation pipe can be accurately controlled, thereby adjusting the temperature of the anti-condensation pipe. While ensuring the anti-condensation effect of the refrigerator, the heat infiltrating into the internal compartments of the refrigerator can be effectively controlled. In addition, the electric valve also has the ability to shunt the refrigerant, enabling precise temperature control in multiple temperature zones of the refrigerator. In the state where the electric valve is completely closed, the pressure-holding function of the condenser can be completed, reducing the migration of the refrigerant during the compressor shutdown period and the pressure reconstruction loss during restart, thereby achieving the effect of reducing the energy consumption of the refrigerator.

[0013] Optionally, the electric valve includes a valve seat, a motor and a valve cover;

[0014] The valve cover is sleeved on the outer wall of the valve seat, and the motor is arranged on the valve cover;

[0015] The motor includes a stator and a rotor. The stator is located on the outer surface of the valve cover, and the rotor is located inside the valve cover; a mandrel is provided at the center of the rotor, and the rotor rotates around the center line of the mandrel; a valve core is provided at one end of the mandrel, and the valve core rotates based on the drive of the motor; the lower surface of the valve core abuts against the upper surface of the valve seat;

[0016] The valve core is provided with a diversion groove and a through groove. The diversion groove is located on the lower surface of the valve core, and the area of the diversion groove is smaller than the area of the side of the valve core away from the diversion groove; the through groove extends along the thickness direction of the valve core to the outside of the valve core.

[0017] The electric valve integrates a valve seat, a motor and a valve cover, with the motor disposed on the valve cover, achieving a compact structure and efficient integration of functions. The motor serves as the driving source, with its stator located on the outer surface of the valve cover and the rotor placed inside the valve cover. The rotor is connected to the valve core through a mandrel, ensuring that the valve core can rotate precisely based on the drive of the motor. The lower surface of the valve core abuts against the upper surface of the valve seat, ensuring good sealing performance. In addition, the diversion grooves and through grooves provided on the valve core not only optimize the fluid flow path, reduce flow resistance, but also enable the electric valve to have good sealing and flow performance while maintaining efficient control.

[0018] Optionally, the rotational positions of the valve core include a first position, a second position, a third position, and a seventh position;

[0019] When the valve core is in the first position, the diversion groove, the second inlet, and the first outlet are in communication;

[0020] When the valve core is in the second position, the first inlet is in communication with the first outlet through the through groove;

[0021] When the valve core is in the third position, the first outlet, the second inlet, and the first inlet are isolated from each other;

[0022] When the valve core is in the seventh position, both the first outlet and the second inlet are in communication with the first inlet.

[0023] The first position, the second position, the third position, and the seventh position greatly enhance the adjustment flexibility and accuracy of the valve core. This design enables the electric valve to precisely control the fluid flow direction and on-off according to actual needs, not only improving the operating efficiency of the refrigerator energy-saving refrigeration system, but also reducing energy consumption by optimizing the fluid path, further enhancing the energy-saving effect and reliability of the system.

[0024] Optionally, the controller is further configured to:

[0025] According to the control instruction of the refrigeration state of the refrigerator in a low-humidity environment, control the second inlet and the first outlet of the electric valve to open, and control the first inlet to close;

[0026] When the refrigeration system state is the state where the anti-condensation pipe is fully closed, control the motor of the electric valve to drive the valve core to rotate so that the valve core is in the first position;

[0027] According to the control instruction of the refrigeration state of the refrigerator in a high-humidity environment, control the first inlet and the first outlet of the electric valve to open, and control the second inlet to close;

[0028] When the refrigeration system state is the state where the anti-condensation pipe is fully open, control the motor of the electric valve to drive the valve core to rotate so that the valve core is in the second position;

[0029] According to the control instruction of the condenser pressure-holding state, control the closing of the first inlet, the second inlet, and the first outlet of the electric valve;

[0030] When the refrigeration system is in the condenser pressure-holding state, control the motor of the electric valve to drive the valve core to rotate so that the valve core is in the third position;

[0031] According to the control instruction of the medium-humidity environment refrigerator refrigeration state, control the first inlet and the second inlet of the electric valve to open simultaneously and communicate with the first outlet;

[0032] When the refrigeration system is in the anti-condensation pipe shunt state, control the motor of the electric valve to drive the valve core to rotate so that the valve core is in the seventh position.

[0033] According to different environmental humidity and refrigerator refrigeration state requirements, the controller can accurately adjust the opening and closing states of multiple inlets and outlets of the electric valve, as well as the position of the valve core, so as to achieve fine management of the refrigerant flow direction and pressure.

[0034] Optionally, a second outlet is further provided on the electric valve,

[0035] The capillary tube group includes a first capillary tube and a second capillary tube. The first outlet is communicated with the first capillary tube through a first liquid outlet pipe; the second outlet is communicated with the second capillary tube through a second liquid outlet pipe;

[0036] The evaporator group includes a first evaporator and a second evaporator. The first capillary tube is connected to the first evaporator, and the second capillary tube is connected to the second evaporator;

[0037] The controller is further configured to:

[0038] According to the control instruction of the refrigerator environmental humidity and the switching of the refrigeration system state, control the opening and closing of the first inlet, the second inlet, the first outlet, and the second outlet of the electric valve, so that at most two inlets and at most two outlets among the first inlet, the second inlet, the first outlet, and the second outlet are in the open state.

[0039] By introducing the second outlet, the second capillary tube, and the second evaporator, the electric valve realizes more detailed and efficient control of the refrigeration system. By independently controlling the operation of the two evaporators, precise temperature control of different temperature zones is achieved, providing users with more flexibility and a better user experience.

[0040] Optionally, the rotation positions of the valve core further include a fourth position, a fifth position, a sixth position, and an eighth position;

[0041] When the valve core is in the fourth position, the diversion groove, the second inlet, and the second outlet are communicated;

[0042] When the valve core is in the fifth position, the first inlet communicates with the second outlet through the through groove;

[0043] When the valve core is in the sixth position, the second inlet, the first outlet, the second outlet, and the first inlet are isolated from each other;

[0044] When the valve core is in the eighth position, the diversion groove, the second inlet, and the second outlet are connected, and the first inlet communicates with the second outlet through the through groove.

[0045] The fourth, fifth, sixth, and eighth positions further enhance the adjustment flexibility and precision of the valve core. This multi-position design enables the electric valve to more precisely control the flow direction and on / off of the fluid, meeting more complex working conditions and refrigeration requirements, thereby improving the overall performance, energy efficiency ratio, and reliability of the refrigerator energy-saving refrigeration system. Users can accurately adjust the position of the valve core through the controller according to actual needs, achieving precise control of the internal environment of the refrigerator, enhancing the user experience, and reducing energy consumption.

[0046] Optionally, the controller is further configured to:

[0047] According to the control instruction of the refrigeration state of the refrigerator in a low-humidity environment, control the second inlet and the second outlet of the electric valve to open, and control the first inlet to close;

[0048] When the refrigeration system is in the state of the anti-condensation pipe being fully closed, control the motor of the electric valve to drive the valve core to rotate so that the valve core is in the fourth position;

[0049] According to the control instruction of the refrigeration state of the refrigerator in a high-humidity environment, control the first inlet and the second outlet of the electric valve to open, and control the second inlet to close;

[0050] When the refrigeration system is in the state of the anti-condensation pipe being fully open, control the motor of the electric valve to drive the valve core to rotate so that the valve core is in the fifth position;

[0051] According to the control instruction of the condenser pressure-holding state, control the first inlet, the second inlet, the first outlet, and the second outlet of the electric valve to be all in the closed state;

[0052] When the refrigeration system is in the condenser pressure-holding state, control the motor of the electric valve to drive the valve core to rotate so that the valve core is in the sixth position;

[0053] According to the control instruction of the refrigeration state of the refrigerator in a medium-humidity environment, control the first inlet and the second inlet of the electric valve to communicate with the first outlet or the second outlet simultaneously;

[0054] When the refrigeration system is in the anti-condensation pipe shunt state, control the motor of the electric valve to drive the valve core to rotate so that the valve core is in the eighth position.

[0055] The controller realizes the efficient, stable and intelligent operation of the refrigerator refrigeration system by finely adjusting the opening and closing states of multiple inlets and outlets of the electric valve and accurately driving the valve core to a specific position according to different environmental humidities and refrigeration system state instructions.

[0056] Optionally, the first evaporator and the second evaporator are connected in parallel; a check valve is provided at the outlet of the second evaporator, and the conduction direction of the check valve is from the outlet of the second evaporator to the inlet of the compressor.

[0057] Since the evaporation temperature in the freezer compartment of the refrigerator is low and the saturated vapor pressure is low; the temperature of the evaporator in the refrigerator compartment is high and the pressure is high. The function of the check valve is to prevent the refrigerant in the refrigerating evaporator from migrating to the freezing evaporator, avoid the phenomenon of liquid shortage and overheating of the refrigerating evaporator when the refrigerator compartment is refrigerated, improve the operating efficiency of the refrigeration system, and reduce the energy consumption of the refrigerator.

[0058] Optionally, the number of the filters is two;

[0059] The first filter is arranged between the liquid inlet pipe and the anti-condensation pipe; the second filter is arranged between the bypass inlet air pipe and the bypass pipe.

[0060] The two filters are at key positions in the refrigerator refrigeration system, which can significantly improve the filtering efficiency, refrigeration performance and reliability of the system. The first filter is placed between the liquid inlet pipe and the anti-condensation pipe, effectively intercepting and removing impurities and particulate matters entering the refrigeration cycle, preventing them from jamming the electric valve or forming ice blockage in the capillary tube group, thus ensuring the smooth flow of the refrigerant and efficient heat exchange, and at the same time prolonging the service life of the anti-condensation pipe. The second filter is arranged between the bypass inlet air pipe and the bypass pipe, specifically filtering the gas returning from the evaporator, further purifying the refrigerant, reducing the moisture and impurity content in the system, effectively preventing the occurrence of the "ice blockage" phenomenon, especially when operating in a low humidity environment, greatly improving the stability and maintenance-free performance of the system. The configuration of the double filters not only enhances the filtering ability of the entire refrigeration system, ensures the purity and fluidity of the refrigerant, but also improves the refrigeration efficiency and temperature uniformity by optimizing the internal air flow path and pressure distribution of the system.

[0061] The second aspect of the present application provides a control method for a refrigerator energy-saving refrigeration system, which is applied to the refrigerator energy-saving refrigeration system described in the first aspect. The method includes:

[0062] According to the environmental humidity of the refrigerator and the control instruction for switching the refrigeration system state, control the opening and closing of the first inlet, the second inlet and the first outlet of the electric valve;

[0063] The refrigeration system states include the full - closed state of the anti - condensation pipe, the shunt state of the anti - condensation pipe, the full - open state of the anti - condensation pipe, and the pressure - maintaining state of the condenser.

[0064] The control method of the energy - saving refrigeration system of the refrigerator controls the electric valve through the controller, can accurately control the flow rate of the refrigerant flowing through the anti - condensation pipe, and then adjusts the temperature of the anti - condensation pipe. While ensuring the anti - condensation effect of the refrigerator, it effectively controls the heat infiltrating into the internal compartments of the refrigerator. In addition, the electric valve also has the ability to shunt the refrigerant, enabling precise temperature control in multiple temperature zones of the refrigerator. In the state where the electric valve is completely closed, the pressure - maintaining function of the condenser can be completed, reducing the migration of the refrigerant during compressor shutdown and the pressure - rebuilding loss during restart, thereby achieving the effect of reducing the energy consumption of the refrigerator.

[0065] As can be seen from the above technical solutions, the present application provides an energy - saving refrigeration system and a control method for a refrigerator. The system includes: a controller, a compressor, a condenser, an anti - condensation pipe, a filter, an electric valve, a capillary tube group, and an evaporator group; the compressor is sequentially connected to the condenser, the anti - condensation pipe, the filter, the electric valve, the capillary tube group, and the evaporator group along the outlet direction of the compressor, and the outlet of the evaporator group is connected to the inlet of the compressor; the controller is electrically connected to the compressor and the electric valve respectively; the electric valve is provided with a first inlet, a second inlet, and a first outlet; the first inlet is communicated with the anti - condensation pipe through a liquid inlet pipe; the first outlet is communicated with the capillary tube group through a first liquid outlet pipe; the second inlet is communicated with one end of a bypass pipe through a bypass liquid inlet pipe, and the other end of the bypass pipe is connected to the pipeline between the condenser and the anti - condensation pipe through a three - way pipe; according to the environmental humidity of the refrigerator and the control instruction for switching the refrigeration system state, the opening and closing of the first inlet, the second inlet, and the first outlet of the electric valve are controlled to solve the problem of energy consumption caused by too high temperature of the anti - condensation pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] In order to more clearly illustrate the technical solutions of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

[0067] Figure 1 It is a schematic diagram of the energy - saving refrigeration system of the refrigerator with a single evaporator provided by the embodiment of the present application in the full - closed state of the anti - condensation pipe;

[0068] Figure 2 It is a schematic structural diagram of the energy - saving refrigeration system of the refrigerator provided by the embodiment of the present application when the valve core is in the first position;

[0069] Figure 3Cross-sectional view of the valve core in the first position in the refrigerator energy-saving refrigeration system provided by the embodiment of the present application;

[0070] Figure 4 Schematic diagram of the structure of the electric valve in the refrigerator energy-saving refrigeration system provided by the embodiment of the present application;

[0071] Figure 5 Schematic diagram of the refrigerator energy-saving refrigeration system with a single evaporator in the state where the anti-condensation pipe is fully open provided by the embodiment of the present application;

[0072] Figure 6 Schematic diagram of the structure of the valve core in the second position in the refrigerator energy-saving refrigeration system provided by the embodiment of the present application;

[0073] Figure 7 Cross-sectional view of the valve core in the second position in the refrigerator energy-saving refrigeration system provided by the embodiment of the present application;

[0074] Figure 8 Schematic diagram of the refrigerator energy-saving refrigeration system with a single evaporator in the state where the condenser is kept under pressure provided by the embodiment of the present application;

[0075] Figure 9 Schematic diagram of the structure of the valve core in the third position in the refrigerator energy-saving refrigeration system provided by the embodiment of the present application;

[0076] Figure 10 Cross-sectional view of the valve core in the third position in the refrigerator energy-saving refrigeration system provided by the embodiment of the present application;

[0077] Figure 11 Schematic diagram of the refrigerator energy-saving refrigeration system with a double evaporator in the state where the anti-condensation pipe of the freezer is fully closed provided by the embodiment of the present application;

[0078] Figure 12 Schematic diagram of the structure of the valve core in the fourth position in the refrigerator energy-saving refrigeration system provided by the embodiment of the present application;

[0079] Figure 13 Cross-sectional view of the valve core in the fourth position in the refrigerator energy-saving refrigeration system provided by the embodiment of the present application;

[0080] Figure 14 Schematic diagram of the refrigerator energy-saving refrigeration system with a double evaporator in the state where the anti-condensation pipes of the refrigerator compartment and the freezer are fully closed provided by the embodiment of the present application;

[0081] Figure 15 Schematic diagram of the refrigerator energy-saving refrigeration system with a double evaporator in the state where the anti-condensation pipe of the freezer is fully open provided by the embodiment of the present application;

[0082] Figure 16Schematic diagram of the structure of the valve core in the fifth position in the refrigerator energy-saving refrigeration system provided by the embodiment of the present application;

[0083] Figure 17 Cross-sectional view of the valve core in the fifth position in the refrigerator energy-saving refrigeration system provided by the embodiment of the present application;

[0084] Figure 18 Schematic diagram of the refrigerator energy-saving refrigeration system with double evaporators provided by the embodiment of the present application when the anti-condensation pipes in the refrigerating chamber and the freezing chamber are in the fully open state;

[0085] Figure 19 Schematic diagram of the refrigerator energy-saving refrigeration system with double evaporators provided by the embodiment of the present application when the condenser is in the pressure-holding state;

[0086] Figure 20 Schematic diagram of the structure of the valve core in the sixth position in the refrigerator energy-saving refrigeration system provided by the embodiment of the present application;

[0087] Figure 21 Cross-sectional view of the valve core in the sixth position in the refrigerator energy-saving refrigeration system provided by the embodiment of the present application;

[0088] Figure 22 Schematic diagram of the refrigerator energy-saving refrigeration system with parallel double evaporators provided by the embodiment of the present application;

[0089] Figure 23 Schematic diagram of the refrigerator energy-saving refrigeration system with a single evaporator provided by the embodiment of the present application when the anti-condensation pipes are in the shunt state;

[0090] Figure 24 Schematic diagram of the structure of the valve core in the seventh position in the refrigerator energy-saving refrigeration system provided by the embodiment of the present application;

[0091] Figure 25 Schematic diagram of the refrigerator energy-saving refrigeration system with double evaporators provided by the embodiment of the present application when the anti-condensation pipes are in the shunt state;

[0092] Figure 26 Schematic diagram of the structure of the valve core in the eighth position in the refrigerator energy-saving refrigeration system provided by the embodiment of the present application;

[0093] Figure 27 Schematic diagram of the structure of another embodiment of the valve core in the eighth position in the refrigerator energy-saving refrigeration system provided by the embodiment of the present application;

[0094] Figure 28 Cross-sectional view of the valve core in the eighth position in the refrigerator energy-saving refrigeration system provided by the embodiment of the present application.

[0095] Illustration:

[0096] Among them, 1 - compressor, 2 - anti - condensation pipe, 3 - condenser, 4 - electric valve, 41 - valve seat, 411 - first inlet, 412 - second inlet, 413 - first outlet, 414 - second outlet, 42 - motor, 421 - stator, 422 - rotor, 43 - valve cover, 44 - valve core, 441 - diversion groove, 442 - through groove, 51 - first capillary tube, 52 - second capillary tube, 61 - first evaporator, 62 - second evaporator, 7 - bypass pipe, 8 - liquid inlet pipe, 9 - first liquid outlet pipe, 10 - bypass intake pipe, 11 - second liquid outlet pipe, 12 - tee, 13 - filter, 14 - check valve. Detailed implementation manners

[0097] The embodiments will be described in detail below, and the examples are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following embodiments do not represent all the implementation manners consistent with the present application. They are only examples of systems and methods consistent with some aspects of the present application.

[0098] It should be noted that the brief description of the terms in the present application is only for the convenience of understanding the implementation manners described next, rather than intending to limit the implementation manners of the present application. Unless otherwise specified, these terms should be understood in their ordinary and common meanings.

[0099] The terms "first", "second", "third", etc. in the specification, claims and the above - mentioned drawings of the present application are used to distinguish similar or like objects or entities, and do not necessarily mean to limit a specific order or sequence, unless otherwise noted. It should be understood that such terms can be interchanged under appropriate circumstances.

[0100] The terms "comprising" and "having" and any variations thereof are intended to cover but not exclude inclusion. For example, a product or device comprising a series of components does not necessarily have to be limited to all the components clearly listed, but may include other components not clearly listed or inherent to these products or devices.

[0101] Refrigerators are generally equipped with a refrigerating compartment and a freezing compartment. Among them, the main function of the refrigerating compartment is to preserve freshness. It is usually located in the upper half of the refrigeration device 100, and the designed temperature is generally higher than 0°C, usually between 2°C and 8°C. This temperature range is sufficient to slow down the growth rate of bacteria in food, thereby extending the shelf life of food, while maintaining the freshness and taste of food. In the refrigerating compartment, various perishable foods can be stored, such as vegetables, fruits, dairy products, cooked meat, and leftovers. The main function of the freezing compartment is to freeze and store food for a long time. It is usually located in the lower half of the refrigerator, and the designed temperature is much lower than 0°C, generally below -18°C. At this extremely low temperature, the moisture in the food will quickly freeze, effectively preventing the growth of bacteria and enabling the food to be stored for a long time without spoiling. In the freezing compartment, meats, fish, ice cream, frozen foods, etc. can be stored for a long time.

[0102] The refrigeration system of refrigerators generally adopts a vapor compression cycle, and the heat exchange inside and outside the box is achieved through the coordinated action of components such as a compressor, a condenser, and an evaporator. In a humid environment, condensation is likely to form near the refrigerator door seal due to the temperature difference between the inside and outside, seriously affecting the user experience. The traditional design solution is to set an anti-condensation pipe at the joint between the low-temperature compartment and the door seal, and use high-temperature refrigerant to locally heat the area prone to condensation to prevent condensation. However, this solution has significant defects: the heating power of the anti-condensation pipe is fixed and cannot be dynamically adjusted according to the environmental humidity, resulting in excessive heating and increased heat load in a humid environment. In the refrigeration system of related embodiments, a three-way valve with one inlet and two outlets is provided, and the three-way solenoid valve is configured to control whether the refrigerant flows through the pipeline where the anti-condensation pipe is located, reducing the excessive heat penetration into the box. However, for a three-way reversing solenoid valve with one inlet and two outlets, the valve position can only be set at the front end of the anti-condensation pipe, and it does not have the function of diverting the refrigerant to the evaporator component, and cannot reduce the migration of the refrigerant during compressor shutdown and the pressure reconstruction loss during restart.

[0103] To solve the problem of energy consumption caused by the too high temperature of the anti-condensation pipe, refer to Figures 1 - 28 , some embodiments of the present application provide an energy-saving refrigeration system for a refrigerator, including: a controller, a compressor 1, a condenser 3, an anti-condensation pipe 2, a filter 13, an electric valve 4, a capillary tube group, and an evaporator group.

[0104] The compressor 1 is sequentially connected to the condenser 3, the anti-condensation pipe 2, the filter 13, the electric valve 4, the capillary tube group, and the evaporator group in the outlet direction of the compressor 1. The outlet of the evaporator group is connected to the inlet of the compressor 1. The controller is electrically connected to the compressor 1 and the electric valve 4 respectively. The electric valve 4 is provided with a first inlet 411, a second inlet 412, and a first outlet 413. The first inlet 411 is communicated with the anti-condensation pipe 2 through a liquid inlet pipe 8. The first outlet 413 is communicated with the capillary tube group through a first liquid outlet pipe 9. The second inlet 412 is communicated with one end of a bypass pipe 7 through a bypass inlet pipe 10. The other end of the bypass pipe 7 is connected to the position between the condenser 3 and the anti-condensation pipe 2 through a tee pipe 12.

[0105] It should be understood that the first inlet 411 and the second inlet 412 respectively control the activation and stop of the anti-condensation pipe 2. Valves are provided at the first inlet 411, the second inlet 412, and the first outlet 413. The electric valve 4 controls the opening and closing of the valves in response to the instructions issued by the controller. The evaporator group can be a single evaporator or a double evaporator.

[0106] The controller is configured to: control the opening and closing of the first inlet 411, the second inlet 412, and the first outlet 413 of the electric valve 4 according to the humidity of the refrigerator environment and the control instructions for switching the refrigeration system state. The refrigeration system state includes the full-closed state of the anti-condensation pipe, the shunt state of the anti-condensation pipe, the full-open state of the anti-condensation pipe, and the pressure-holding state of the condenser.

[0107] It should be understood that the humidity of the refrigerator environment can be measured according to a refrigerator environment humidity sensor. The refrigerator environment humidity sensor is arranged at the edge of the top frame of the refrigerator to collect signals of environmental humidity changes in real time. The controller is electrically connected to the refrigerator environment humidity sensor. Through the switching of the electric valve, the start-stop ratio of the anti-condensation pipe under different humidity environments changes flexibly, ensuring that the refrigerator can neither condense nor minimize the heat load of the cabinet under various humidity conditions, and achieving the lowest energy consumption of the refrigerator. Specifically, when the humidity of the refrigerator environment is 70%RH - 80%RH, the anti-condensation pipe is fully open for 8 minutes and deactivated for 2 minutes; when the environmental humidity is 60%RH - 70%RH, the anti-condensation pipe is fully open for 6 minutes and deactivated for 4 minutes; when the environmental humidity is 50%RH - 60%RH, the anti-condensation pipe is fully open for 4 minutes and deactivated for 6 minutes; when the environmental humidity is 20%RH - 50%RH, the anti-condensation pipe is fully open for 2 minutes and deactivated for 8 minutes.

[0108] The electric valve 4 in the energy-saving refrigeration system of the refrigerator adopts a double-inlet structure design to adapt to various humidity environments. By controlling the electric valve 4 through the controller, the flow rate of the refrigerant flowing through the anti-condensation pipe 2 can be accurately controlled, and then the temperature of the anti-condensation pipe 2 can be adjusted. While ensuring the anti-condensation effect of the refrigerator, the heat infiltrating into the internal compartments of the refrigerator can be effectively controlled. In addition, the electric valve 4 also has the ability to split the refrigerant, enabling precise temperature control in multiple temperature zones of the refrigerator. In the state where the electric valve 4 is completely closed, the pressure-holding function of the condenser 3 can be completed, reducing the migration of the refrigerant during the shutdown of the compressor 1 and the loss of pressure reconstruction during restart, thereby achieving the effect of reducing the energy consumption of the refrigerator.

[0109] In some embodiments, the electric valve 4 includes a valve seat 41, a motor 42, and a valve cover 43; the valve cover 43 is sleeved on the outer wall of the valve seat 41, and the motor 42 is arranged on the valve cover 43; the motor 42 includes a stator 421 and a rotor 422, the stator 421 is located on the outer surface of the valve cover 43, and the rotor 422 is located inside the valve cover 43; a mandrel is provided at the center of the rotor 422, and the rotor 422 rotates around the center line of the mandrel; one end of the mandrel is provided with a valve core 44, and the valve core 44 rotates based on the drive of the motor 42; the lower surface of the valve core 44 abuts against the upper surface of the valve seat 41; a diversion groove 441 and a through groove 442 are formed on the valve core 44, the diversion groove 441 is located on the lower surface of the valve core 44, and the area of the diversion groove 441 is smaller than the area of the side of the valve core 44 away from the diversion groove 441; the through groove 442 extends along the thickness direction of the valve core 44 to the outside of the valve core 44. The cross-section of the diversion groove 441 can be a strip-shaped or arc-shaped structure.

[0110] It should be understood that the rotor 422 is made of magnetic material and is easily adsorbed with tiny particles such as iron filings; the valve core 44 is made of hard polyphenylene sulfide and has high temperature resistance and corrosion resistance. The valve seat 41 is made of stainless steel material, and the inlet and outlet sealing performance depends on the tight fit between the valve core 44 and the valve seat 41.

[0111] The electric valve 4 realizes the compact integration of structure and high-efficiency integration of functions by integrating the valve seat 41, the motor 42, and the valve cover 43, and arranging the motor 42 on the valve cover 43. The motor 42 serves as the driving source, with its stator 421 located on the outer surface of the valve cover 43 and the rotor 422 placed inside the valve cover 43 and connected to the valve core 44 through a mandrel, ensuring that the valve core 44 can rotate precisely based on the drive of the motor 42. The lower surface of the valve core 44 abuts against the upper surface of the valve seat 41 to ensure good sealing performance. In addition, the diversion groove 441 and the through groove 442 formed on the valve core 44 not only optimize the fluid flow path, reduce the flow resistance, but also enable the electric valve 4 to have good sealing performance and flow performance while maintaining efficient control.

[0112] In some embodiments, the rotational positions of the valve core 44 include a first position, a second position, a third position, and a seventh position;

[0113] When the valve core 44 is in the first position, the diversion groove 441, the second inlet 412, and the first outlet 413 are in communication;

[0114] When the valve core 44 is in the second position, the first inlet 411 is in communication with the first outlet 413 through the through groove 442;

[0115] When the valve core 44 is in the third position, the first outlet 413, the second inlet 412, and the first inlet 411 are isolated from each other;

[0116] When the valve core 44 is in the seventh position, the first inlet 411, the second inlet 412, and the first outlet 413 are in communication simultaneously.

[0117] It should be understood that when the valve core 44 is in the first position, the diversion groove 441, the second inlet 412, and the first outlet 413 are in communication, realizing a specific fluid flow path, facilitating the rapid adjustment of the system state or coping with specific working conditions; when the valve core 44 is switched to the second position, the first inlet 411 is directly in communication with the first outlet 413 through the through groove 442, simplifying the fluid flow process, reducing the flow resistance, and improving the system efficiency; while in the third position, the second inlet 412, the first outlet 413, and the first inlet 411 are isolated from each other, ensuring the sealing and stability of the system.

[0118] The first position, the second position, the third position, and the seventh position greatly enhance the adjustment flexibility and accuracy of the valve core 44. This design enables the electric valve 4 to precisely control the flow direction and on / off of the fluid according to actual needs, not only improving the operating efficiency of the refrigerator energy-saving refrigeration system, but also reducing energy consumption by optimizing the fluid path, further enhancing the energy-saving effect and reliability of the system.

[0119] In some embodiments, the controller is further configured to:

[0120] According to the control instruction of the refrigeration state of the low-humidity environment refrigerator, control the second inlet 412 and the first outlet 413 of the electric valve 4 to open, and control the first inlet 411 to close; when the refrigeration system state is the state where the anti-condensation pipe is fully closed, control the motor 42 of the electric valve 4 to drive the valve core 44 to rotate, so that the valve core 44 is in the first position.

[0121] It should be understood that when the valve core 44 is in the first position, the bypass inlet pipe 10 and the first liquid outlet pipe 9 communicate with each other, the refrigerant flows directly from the condenser 3 to the electric valve 4, the refrigerant in the anti-condensation pipe 2 is in a static state, and the temperature of the anti-condensation pipe 2 is relatively low.

[0122] According to the control instruction of the refrigeration state of the refrigerator in a high-humidity environment, control the first inlet 411 and the first outlet 413 of the electric valve 4 to open, and control the second inlet 412 to close; when the refrigeration system state is the state where the anti-condensation pipe is fully open, control the motor 42 of the electric valve 4 to drive the valve core 44 to rotate so that the valve core 44 is in the second position.

[0123] It should be understood that the humidity of the low-humidity environment can be selected between 20%RH - 50%RH, the humidity of the medium-humidity environment can be selected between 50%RH - 70%RH, and the humidity of the high-humidity environment can be selected between 70%RH - 80%RH.

[0124] When the valve core 44 is in the second position, the liquid inlet pipe 8 and the first liquid outlet pipe 9 communicate with each other, and the hot refrigerant flows from the condenser 3 to the anti-condensation pipe 2, the temperature of the anti-condensation pipe 2 rises, and the second inlet 412 is closed by the valve core 44.

[0125] According to the control instruction of the condenser pressure-holding state, control the first inlet 411, the second inlet 412, and the first outlet 413 of the electric valve 4 to close; when the refrigeration system state is the condenser pressure-holding state, control the motor 42 of the electric valve 4 to drive the valve core 44 to rotate so that the valve core 44 is in the third position.

[0126] It should be understood that when the valve core 44 is in the third position, a flow guide groove 441 is provided on the side of the valve core 44 of the electric valve 4 that is close to the valve seat 41, and the area of the flow guide groove 441 is smaller than the area on the other side of the valve core 44. Under the same pressure environment, ensure that the valve core 44 is tightly attached to the valve seat 41, and the refrigerant does not leak to the first outlet 413. The liquid inlet pipe 8, the bypass intake pipe 10, and the first liquid outlet pipe 9 are all in a closed state. When the compressor 1 stops, the high-pressure refrigerant in the condenser 3 and the anti-condensation pipe 2 is sealed in the pipeline, avoiding the migration of the hot refrigerant to the evaporator after the refrigerator compressor 1 stops and the energy loss caused by the pressure reconstruction when the compressor 1 starts again.

[0127] According to the control instruction of the refrigeration state of the refrigerator in a medium-humidity environment, control the first inlet 411 and the second inlet 412 of the electric valve 4 to open simultaneously and communicate with the first outlet 413; when the refrigeration system state is the anti-condensation pipe shunt state, the flow rate of the refrigerant in the anti-condensation pipe is between fully closed and fully open, control the motor 42 of the electric valve 4 to drive the valve core 44 to rotate so that the valve core 44 is in the seventh position.

[0128] According to different environmental humidity and the requirements of the refrigerator refrigeration state, the controller can precisely adjust the opening and closing states of multiple inlets and outlets of the electric valve 4, as well as the position of the valve core 44, so as to achieve fine management of the refrigerant flow direction and pressure. In a low-humidity environment, by opening the second inlet 412 and the first outlet 413, closing the first inlet 411, and adjusting the valve core 44 to the first position, excessive refrigeration can be effectively prevented and energy can be saved; while in a high-humidity environment, the opposite operation is carried out to prevent local condensation in the refrigerator. When the anti-condensation pipe 2 of the refrigeration system is in a closed or fully open state, the controller adjusts the valve core 44 to the first or second position respectively, and controls the duty cycle of the first position and the second position states according to the signal of the humidity sensor to ensure the safe operation and efficient refrigeration of the system. When the compressor 1 stops running, all inlets and outlets are closed, and at the same time, the valve core 44 is placed in the third position to reduce the energy loss generated by the refrigeration system during the refrigerant migration and pressure reconstruction process.

[0129] In some embodiments, a second outlet 414 is further provided on the electric valve 4. The capillary tube group includes a first capillary tube 51 and a second capillary tube 52. The first outlet 413 is communicated with the first capillary tube 51 through a first liquid outlet pipe 9; the second outlet 414 is communicated with the second capillary tube 52 through a second liquid outlet pipe 11; the evaporator group includes a first evaporator 61 and a second evaporator 62. The first capillary tube 51 is connected to the first evaporator 61, and the second capillary tube 52 is connected to the second evaporator 62.

[0130] It should be understood that the first evaporator 61 can be a refrigerating evaporator, and the first evaporator 61 and the second evaporator 62 can be connected in series or in parallel. A valve is provided on the second outlet 414, and the electric valve 4 controls the opening and closing of the valve in response to an instruction issued by the controller.

[0131] The controller is further configured to: according to the environmental humidity of the refrigerator and the control instruction for switching the refrigeration system state, control the opening and closing of the first inlet 411, the second inlet 412, the first outlet 413, and the second outlet 414 of the electric valve 4, so that at most two inlets and at most two outlets among the first inlet 411, the second inlet 412, the first outlet 413, and the second outlet 414 are in an open state.

[0132] By introducing the second outlet 414, the second capillary tube 52, and the second evaporator 62, the electric valve 4 realizes more delicate and efficient control of the refrigeration system. By independently controlling the operation of the two evaporators, precise temperature control of different temperature zones is achieved, providing more flexibility and a better user experience for users.

[0133] In some embodiments, the rotation positions of the valve core 44 further include a fourth position, a fifth position, a sixth position, and an eighth position;

[0134] When the valve core 44 is in the fourth position, the diversion groove 441, the second inlet 412 and the second outlet 414 are in communication;

[0135] When the valve core 44 is in the fifth position, the first inlet 411 communicates with the second outlet 414 through the through groove 442;

[0136] When the valve core 44 is in the sixth position, the second inlet 412, the first outlet 413, the second outlet 414 and the first inlet 411 are isolated from each other;

[0137] When the valve core 44 is in the eighth position, the diversion groove 441, the second inlet 412 and the second outlet 414 are in communication, the first inlet 411 communicates with the second outlet 414 through the through groove 442, and the flow rate of the refrigerant in the anti-condensation pipe is between fully closed and fully open.

[0138] It should be understood that when the valve core 44 is in the fourth position, the diversion groove 441, the second inlet 412 and the second outlet 414 are in communication, providing an additional fluid flow path for the system, which helps to optimize the flow rate and pressure distribution under specific working conditions. When the valve core 44 is in the fifth position, the first inlet 411 directly communicates with the second outlet 414 through the through groove 442, simplifying the fluid path, reducing the flow resistance, and improving the response speed and efficiency of the system. When the valve core 44 is in the sixth position, all the inlets and outlets are isolated from each other, ensuring the sealing and stability of the system, preventing fluid leakage and pressure fluctuations.

[0139] The fourth position, the fifth position, the sixth position and the eighth position further enhance the adjustment flexibility and accuracy of the valve core 44. This multi-position design enables the electric valve 4 to more precisely control the flow direction and on-off of the fluid, meet more complex working conditions and refrigeration requirements, thereby improving the overall performance, energy efficiency ratio and reliability of the refrigerator energy-saving refrigeration system. Users can accurately adjust the position of the valve core 44 through the controller according to actual needs, achieve precise control of the internal environment of the refrigerator, improve the use experience and reduce energy consumption.

[0140] In some embodiments, the controller is further configured to:

[0141] According to the control instruction of the refrigeration state of the refrigerator in a low-humidity environment, control the second inlet 412 and the second outlet 414 of the electric valve 4 to open, and control the first inlet 411 to close; when the refrigeration system state is the fully closed state of the anti-condensation pipe, control the motor 42 of the electric valve 4 to drive the valve core 44 to rotate so that the valve core 44 is in the fourth position.

[0142] It should be understood that when the valve core 44 is in the fourth position, the bypass inlet pipe 10 and the second liquid outlet pipe 11 communicate with each other. In actual application, only the freezer compartment refrigerates alone, realizing the independent temperature control of multiple temperature zones of the refrigerator.

[0143] According to the control instruction of the refrigeration state of the refrigerator in a high-humidity environment, control the first inlet 411 and the second outlet 414 of the electric valve 4 to open, and control the second inlet 412 to close; when the refrigeration system state is the state where the anti-condensation pipe is fully open, control the motor 42 of the electric valve 4 to drive the valve core 44 to rotate so that the valve core 44 is in the fifth position.

[0144] It should be understood that when the valve core 44 is in the fifth position, the liquid inlet pipe 8 and the second liquid outlet pipe 11 communicate with each other. The hot refrigerant flows from the condenser 3 to the anti-condensation pipe 2, and the temperature of the anti-condensation pipe 2 rises, ensuring that no condensation occurs on the outside of the refrigerator in a high-humidity environment.

[0145] According to the control instruction of the pressure-holding state of the condenser, control the first inlet 411, the second inlet 412, the first outlet 413, and the second outlet 414 of the electric valve 4 to be in a closed state; when the refrigeration system state is the condenser pressure-holding state, control the motor 42 of the electric valve 4 to drive the valve core 44 to rotate so that the valve core 44 is in the sixth position.

[0146] It should be understood that when the valve core 44 is in the sixth position, a flow guide groove 441 is provided on the side of the valve core 44 of the electric valve 4 that is close to the valve seat 41. The area of the flow guide groove 441 is smaller than the area on the other side of the valve core 44. Under the same pressure environment, it is ensured that the valve core 44 is tightly attached to the valve seat 41, and the refrigerant does not leak to the first outlet 413 and the second outlet 414. The liquid inlet pipe 8, the bypass inlet pipe 10, the first liquid outlet pipe 9, and the second liquid outlet pipe 11 are all in a closed state. When the compressor 1 stops, the high-pressure refrigerant in the condenser 3 and the anti-condensation pipe 2 is sealed in the pipeline, avoiding the migration of the hot refrigerant to the evaporator after the refrigerator stops and the energy loss caused by the pressure reconstruction when the compressor 1 starts again.

[0147] According to the control instruction of the refrigeration state of the refrigerator in a medium-humidity environment, control the first inlet 411, the second inlet 412 of the electric valve 4 to be simultaneously connected to the first outlet 413 or the second outlet 414; when the refrigeration system state is the anti-condensation pipe shunt state, control the motor 42 of the electric valve 4 to drive the valve core 44 to rotate so that the valve core 44 is in the eighth position.

[0148] The controller realizes the efficient, stable and intelligent operation of the refrigerator refrigeration system by finely adjusting the opening and closing states of multiple inlets and outlets of the electric valve 4 and accurately driving the valve core 44 to a specific position according to different environmental humidity and refrigeration system status commands. In a low-humidity environment, by opening the second inlet 412 and the second outlet 414 and closing the first inlet 411, combined with the valve core 44 being in the fourth position, the refrigerant flow direction is optimized, unnecessary energy consumption is reduced, and at the same time, the refrigeration effect is ensured. In a high-humidity environment, the first inlet 411 and the second outlet 414 are opened, the second inlet 412 is closed, and the valve core 44 is adjusted to the fifth position to quickly respond to humidity changes and maintain the appropriate humidity and temperature inside the refrigerator. When the compressor 1 stops, all inlets and outlets are closed, and the valve core 44 is in the sixth position, reducing the energy loss of the refrigeration system.

[0149] In some embodiments, the first evaporator 61 and the second evaporator 62 are connected in parallel; a check valve 14 is provided at the outlet of the second evaporator 62, and the conduction direction of the check valve 14 is from the outlet of the second evaporator 62 to the inlet of the compressor 1.

[0150] It should be understood that the first evaporator 61 may be a refrigerating evaporator, and the second evaporator 62 may be a freezing evaporator. Since the evaporation temperature in the freezer compartment of the refrigerator is low and the saturated vapor pressure is low; the temperature of the evaporator in the refrigerator compartment is high and the pressure is high. The function of the check valve 14 is to prevent the refrigerant in the refrigerating evaporator from migrating to the freezing evaporator, avoid the phenomenon of liquid shortage and overheating of the refrigerating evaporator when the refrigerator compartment is refrigerated, improve the operating efficiency of the refrigeration system, and reduce the energy consumption of the refrigerator.

[0151] In some embodiments, the number of the filters 13 is two; the first filter 13 is arranged between the liquid inlet pipe 8 and the anti-condensation pipe 2; the second filter 13 is arranged between the bypass intake pipe 10 and the bypass pipe 7.

[0152] It should be understood that since there will be metal particles generated by metal processing in the refrigerator pipeline or the long-term operation and wear of the compressor 1, these metal particles will flow in the refrigeration pipeline along with the refrigerant. The rotor 422 in the electric valve 4 is a magnetic element, and the metal particles are easily adsorbed and deposited on the rotor 422, causing the stepping motor 42 to lose steps. Therefore, in practical applications, filters 13 are provided between the liquid inlet pipe 8 and the anti-condensation pipe 2, and between the bypass intake pipe 10 and the bypass pipe 7. Specifically, the filter 13 is arranged at the front end of the electric valve 4, which can effectively prevent tiny iron filings from being adsorbed on the rotor, resulting in the electric valve 4 losing steps or getting stuck.

[0153] Two filters 13 are located at key positions in the refrigerator refrigeration system, which can significantly improve the filtration efficiency, refrigeration performance and reliability of the system. The first filter 13 is placed between the liquid inlet pipe 8 and the anti-condensation pipe 2, effectively intercepting and removing impurities and particulate matters entering the refrigeration cycle, preventing them from jamming the electric valve 4 or forming ice blockage in the capillary tube group, thus ensuring the smooth flow of the refrigerant and efficient heat exchange, and at the same time extending the service life of the anti-condensation pipe 2. The second filter 13 is set between the bypass inlet gas pipe 10 and the bypass pipe 7, specifically filtering the gas returning from the evaporator, further purifying the refrigerant, reducing the moisture and impurity content in the system, effectively preventing the occurrence of the "ice blockage" phenomenon, especially when operating in a low-humidity environment, greatly improving the stability and maintenance-free performance of the system. The configuration of the dual filters 13 not only enhances the filtering capacity of the entire refrigeration system, ensures the purity and fluidity of the refrigerant, but also improves the refrigeration efficiency and temperature uniformity by optimizing the internal air flow path and pressure distribution of the system.

[0154] In some other embodiments, during the long-term operation of the compressor 1, there will be mechanical wear, and the tiny iron powder generated by the wear will circulate in the system along with the refrigerant. A magnetic ring can be installed on the filter 13 to intercept and adsorb these tiny particles, avoiding the failure of the electric valve 4.

[0155] Some embodiments of this application also provide a control method for the energy-saving refrigeration system of a refrigerator, which is applied to the energy-saving refrigeration system of the refrigerator described in the above embodiments. The method includes:

[0156] According to the environmental humidity of the refrigerator and the control instruction for switching the refrigeration system state, control the opening and closing of the first inlet 411, the second inlet 412, and the first outlet 413 of the electric valve 4; the refrigeration system state includes the full-closed state of the anti-condensation pipe, the shunt state of the anti-condensation pipe, the full-open state of the anti-condensation pipe, and the pressure-holding state of the condenser.

[0157] The method can precisely control the flow rate of the refrigerant flowing through the anti-condensation pipe 2 by controlling the electric valve 4 through the controller, and then adjust the temperature of the anti-condensation pipe 2. While ensuring the anti-condensation effect of the refrigerator, it effectively controls the heat infiltrating into the internal compartments of the refrigerator. In addition, the electric valve 4 also has the ability to shunt the refrigerant, enabling precise temperature control in multiple temperature zones of the refrigerator. In the state where the electric valve 4 is completely closed, the pressure-holding function of the condenser 3 can be completed, reducing the migration of the refrigerant during the shutdown of the compressor 1 and the pressure reconstruction loss during restart, thereby achieving the effect of reducing the energy consumption of the refrigerator.

[0158] As can be seen from the above technical solutions, the embodiments of the present application provide a refrigerator energy-saving refrigeration system and a control method. The system includes: a controller, a compressor 1, a condenser 3, an anti-condensation pipe 2, a filter 13, an electric valve 4, a capillary tube group, and an evaporator group; the compressor 1 is sequentially connected to the condenser 3, the anti-condensation pipe 2, the filter 13, the electric valve 4, the capillary tube group, and the evaporator group along the outlet direction of the compressor 1, and the outlet of the evaporator group is connected to the inlet of the compressor 1; the controller is electrically connected to the compressor 1 and the electric valve 4 respectively; the electric valve 4 is provided with a first inlet 411, a second inlet 412, and a first outlet 413; the first inlet 411 is communicated with the anti-condensation pipe 2 through a liquid inlet pipe 8; the first outlet 413 is communicated with the capillary tube group through a first liquid outlet pipe 9; the second inlet 412 is communicated with one end of a bypass pipe 7 through a bypass inlet pipe 10, and the other end of the bypass pipe 7 is connected to between the condenser 3 and the anti-condensation pipe 2 through a three-way pipe 12; according to the refrigerator ambient humidity and the control instruction for switching the refrigeration system state, control the opening and closing of the first inlet 411, the second inlet 412, and the first outlet 413 of the electric valve 4 to solve the problem of energy consumption caused by the too high temperature of the anti-condensation pipe.

[0159] For the similar parts between the embodiments provided in the present application, reference can be made to each other. The specific embodiments provided above are only several examples under the general concept of the present application and do not constitute a limitation on the protection scope of the present application. For those skilled in the art, any other embodiments extended based on the solutions of the present application without creative efforts belong to the protection scope of the present application.

Claims

1. A refrigerator energy-saving refrigeration system, characterized in that: include: A controller, a compressor (1), a condenser (3), an anti-condensation tube (2), a filter (13), an electric valve (4), a capillary tube group, and an evaporator group; The compressor (1) is connected to the condenser (3), the anti-condensation tube (2), the filter (13), the electric valve (4), the capillary tube group and the evaporator group in sequence along the outlet direction of the compressor (1); the outlet of the evaporator group is connected to the inlet of the compressor (1); the controller is electrically connected to the compressor (1) and the electric valve (4) respectively; The electric valve (4) is provided with a first inlet (411), a second inlet (412) and a first outlet (413); the first inlet (411) is connected to the anti-condensation tube (2) through a liquid inlet pipe (8); the first outlet (413) is connected to the capillary tube group through a first liquid outlet pipe (9); the second inlet (412) is connected to one end of a bypass tube (7) through a bypass air inlet pipe (10); the other end of the bypass tube (7) is connected to between the condenser (3) and the anti-condensation tube (2) through a three-way pipe (12); The controller is configured to: Controlling the opening and closing of the first inlet (411), the second inlet (412), and the first outlet (413) of the electric valve (4) according to the humidity of the refrigerator environment and the control instruction for switching the refrigeration system state; The refrigeration system states include an anti-condensation pipe fully closed state, an anti-condensation pipe diversion state, an anti-condensation pipe fully open state, and a condenser pressure maintaining state.

2. The refrigerator energy-saving refrigeration system according to claim 1, characterized in that: The electric valve (4) comprises a valve seat (41), a motor (42) and a valve cover (43); The valve cover (43) is sleeved on the outer wall of the valve seat (41), and the motor (42) is arranged on the valve cover (43); The motor (42) comprises a stator (421) and a rotor (422), wherein the stator (421) is located on the outer surface of the valve cover (43), and the rotor (422) is located inside the valve cover (43); a spindle is provided at the center of the rotor (422), and the rotor (422) rotates along the center line of the spindle; a valve core (44) is provided at one end of the spindle, and the valve core (44) rotates based on the drive of the motor (42); the lower surface of the valve core (44) abuts against the upper surface of the valve seat (41); The valve core (44) is provided with a guide groove (441) and a through groove (442); the guide groove (441) is located on the lower surface of the valve core (44); the area of ​​the guide groove (441) is smaller than the area of ​​the side of the valve core (44) away from the guide groove (441); and the through groove (442) extends along the thickness direction of the valve core (44) to the outside of the valve core (44).

3. The refrigerator energy-saving refrigeration system according to claim 2, characterized in that: The rotational position of the valve core (44) includes a first position, a second position, a third position and a seventh position; When the valve core (44) is in the first position, the guide groove (441), the second inlet (412) and the first outlet (413) are connected; When the valve core (44) is in the second position, the first inlet (411) is connected to the first outlet (413) through the through groove (442); When the valve core (44) is in the third position, the first outlet (413), the second inlet (412), and the first inlet (411) are isolated from each other; When the valve core (44) is in the seventh position, the first inlet (411), the second inlet (412) and the first outlet (413) are connected simultaneously.

4. The refrigerator energy-saving refrigeration system according to claim 3, characterized in that: The controller is also configured to: According to a control instruction of a refrigerator refrigeration state in a low humidity environment, the second inlet (412) and the first outlet (413) of the electric valve (4) are controlled to be opened, and the first inlet (411) is controlled to be closed; When the refrigeration system is in the anti-condensation pipe fully closed state, the motor (42) of the electric valve (4) is controlled to drive the valve core (44) to rotate so that the valve core (44) is in the first position; According to a control instruction of a refrigerator refrigeration state in a high humidity environment, the first inlet (411) and the first outlet (413) of the electric valve (4) are controlled to be opened, and the second inlet (412) is controlled to be closed; When the refrigeration system is in the fully open state of the anti-condensation pipe, the motor (42) of the electric valve (4) is controlled to drive the valve core (44) to rotate so that the valve core (44) is in the second position; According to the control instruction of the condenser pressure maintaining state, the first inlet (411), the second inlet (412) and the first outlet (413) of the electric valve (4) are controlled to be closed; When the refrigeration system is in a condenser pressure-maintaining state, controlling the motor (42) of the electric valve (4) to drive the valve core (44) to rotate so that the valve core (44) is in a third position; According to a control instruction of a refrigerator refrigeration state in a medium humidity environment, the first inlet (411) and the second inlet (412) of the electric valve (4) are controlled to open simultaneously and communicate with the first outlet (413); When the refrigeration system is in the anti-condensation pipe bypass state, the motor (42) of the electric valve (4) is controlled to drive the valve core (44) to rotate so that the valve core (44) is in the seventh position.

5. The refrigerator energy-saving refrigeration system according to claim 4, characterized in that: The electric valve (4) is also provided with a second outlet (414). The capillary tube group comprises a first capillary tube (51) and a second capillary tube (52); the first outlet (413) is connected to the first capillary tube (51) via a first liquid outlet tube (9); and the second outlet (414) is connected to the second capillary tube (52) via a second liquid outlet tube (11); The evaporator group comprises a first evaporator (61) and a second evaporator (62), the first capillary tube (51) is connected to the first evaporator (61), and the second capillary tube (52) is connected to the second evaporator (62); The controller is also configured to: According to the humidity of the refrigerator environment and the control instruction for switching the refrigeration system state, the opening and closing of the first inlet (411), the second inlet (412), the first outlet (413), and the second outlet (414) of the electric valve (4) are controlled so that at most two inlets and at most two outlets among the first inlet (411), the second inlet (412), the first outlet (413), and the second outlet (414) are in an open state.

6. The refrigerator energy-saving refrigeration system according to claim 5, characterized in that: The rotational position of the valve core (44) further includes a fourth position, a fifth position, a sixth position and an eighth position; When the valve core (44) is in the fourth position, the guide groove (441), the second inlet (412) and the second outlet (414) are connected; When the valve core (44) is in the fifth position, the first inlet (411) is connected to the second outlet (414) through the through groove (442); When the valve core (44) is in the sixth position, the second inlet (412), the first outlet (413), the second outlet (414), and the first inlet (411) are isolated from each other; When the valve core (44) is in the eighth position, the guide groove (441), the second inlet (412) and the second outlet (414) are connected, and the first inlet (411) is connected to the second outlet (414) through the through groove (442).

7. The refrigerator energy-saving refrigeration system according to claim 6, characterized in that: The controller is also configured to: According to a control instruction of a refrigerator refrigeration state in a low humidity environment, the second inlet (412) and the second outlet (414) of the electric valve (4) are controlled to open, and the first inlet (411) is controlled to close; When the refrigeration system is in the anti-condensation pipe fully closed state, the motor (42) of the electric valve (4) is controlled to drive the valve core (44) to rotate so that the valve core (44) is in a fourth position; According to a control instruction of a refrigerator refrigeration state in a high humidity environment, the first inlet (411) and the second outlet (414) of the electric valve (4) are controlled to be opened, and the second inlet (412) is controlled to be closed; When the refrigeration system is in the fully open state of the anti-condensation pipe, the motor (42) of the electric valve (4) is controlled to drive the valve core (44) to rotate so that the valve core (44) is in the fifth position; According to the control instruction of the condenser pressure maintaining state, the first inlet (411), the second inlet (412), the first outlet (413), and the second outlet (414) of the electric valve (4) are controlled to be in a closed state; When the refrigeration system is in a condenser pressure-maintaining state, controlling the motor (42) of the electric valve (4) to drive the valve core (44) to rotate so that the valve core (44) is in a sixth position; According to a control instruction of a refrigerator refrigeration state in a medium humidity environment, the first inlet (411) and the second inlet (412) of the electric valve (4) are controlled to be connected to the first outlet (413) or the second outlet (414) at the same time; When the refrigeration system is in the anti-condensation pipe bypass state, the motor (42) of the electric valve (4) is controlled to drive the valve core (44) to rotate so that the valve core (44) is in the eighth position.

8. The refrigerator energy-saving refrigeration system according to claim 5, characterized in that: The first evaporator (61) and the second evaporator (62) are connected in parallel; a one-way valve (14) is provided at the outlet of the second evaporator (62), and the conducting direction of the one-way valve (14) is from the outlet of the second evaporator (62) to the inlet of the compressor (1).

9. The refrigerator energy-saving refrigeration system according to claim 1, characterized in that: The number of the filters (13) is two; The first filter (13) is arranged between the liquid inlet pipe (8) and the anti-condensation pipe (2); the second filter (13) is arranged between the bypass air inlet pipe (10) and the bypass pipe (7).

10. A refrigerator energy-saving refrigeration system control method, characterized in that: The refrigerator energy-saving refrigeration system applied to any one of claims 1 to 9, the method comprising: Controlling the opening and closing of the first inlet (411), the second inlet (412), and the first outlet (413) of the electric valve (4) according to the humidity of the refrigerator environment and the control instruction for switching the refrigeration system state; The refrigeration system states include an anti-condensation pipe fully closed state, an anti-condensation pipe diversion state, an anti-condensation pipe fully open state, and a condenser pressure maintaining state.

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