Refrigerating system, refrigerator and control method thereof

Abstract

The invention belongs to the technical field related to refrigeration, and particularly relates to a refrigeration system, a refrigerator and a control method of the refrigerator, and the refrigeration system comprises a refrigeration assembly which comprises a compressor, a condenser, a first evaporator, a second evaporator, a first throttling element and a second throttling element; the refrigeration circulation loop comprises a main pipeline, a first refrigerant branch and a second refrigerant branch, the first refrigerant branch and the second refrigerant branch are arranged in parallel, the first throttling element and the first evaporator are arranged on the first refrigerant branch, and the second throttling element is arranged in the second refrigerant branch; and the first valve body is provided with a first inlet, a first outlet and a second outlet, the first inlet communicates with the outlet of the condenser, the first outlet communicates with the first refrigerant branch, the second outlet communicates with the second refrigerant branch, and the first outlet and the second outlet both have a full-open state, a throttling state and a closed state. According to the system, the refrigerant flow of each chamber can be reasonably distributed according to different refrigeration requirements, and the operation energy consumption of the system is reduced while rapid cooling is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of refrigeration, and more particularly, to a refrigeration system, a refrigerator and a control method thereof. BACKGROUND

[0002] Compared with a single-system refrigerator, a dual-system or triple-system refrigerator is beneficial to improve the preservation effect of food. However, in actual use, the user frequently opens and closes the door, which causes a single compartment or multiple compartments to have refrigeration requirements at the same time. In the related art, when multiple compartments have refrigeration requirements at the same time, the refrigerant flow distribution is uneven, which causes a certain compartment to be excessively cooled or insufficiently cooled, and increases the operating energy consumption. SUMMARY

[0003] The purpose of the present application is to provide a refrigeration system, a refrigerator and a control method thereof, which can reasonably distribute the refrigerant flow of each compartment according to different refrigeration requirements, and reduce the system operating energy consumption while achieving rapid cooling.

[0004] In a first aspect, the present application provides a refrigeration system, comprising: a refrigeration assembly comprising a compressor, a condenser, a first evaporator, a second evaporator, a first throttling element and a second throttling element; a refrigeration cycle circuit comprising a main pipeline and a first refrigerant branch and a second refrigerant branch in communication with the main pipeline, the first refrigerant branch and the second refrigerant branch being arranged in parallel, in the flow direction of the refrigerant, the first throttling element and the first evaporator being arranged in the first refrigerant branch in sequence, the second throttling element being arranged in the second refrigerant branch, the outlet of the first evaporator and the outlet of the second throttling element being in communication with the inlet of the condenser, the second evaporator, the compressor and the condenser being arranged in the main pipeline in sequence; and a first valve body arranged at the connection between the first refrigerant branch and the second refrigerant branch and the main pipeline, the first valve body having a first inlet, a first outlet and a second outlet, the first inlet being in communication with the outlet of the condenser, the first outlet being in communication with the first refrigerant branch, the second outlet being in communication with the second refrigerant branch, the first outlet and the second outlet each having a fully open state, a throttling state and a closed state.

[0005] In a second aspect, the present application provides a refrigerator, comprising: a cabinet, a first compartment and a second compartment arranged in the cabinet; the refrigeration system of each embodiment of the present application, the first evaporator of the refrigeration system being arranged in the first compartment, and the second evaporator being arranged in the second compartment; a sensor assembly for detecting environmental information of the refrigerator, the environmental information comprising the temperature of the first compartment and the temperature of the second compartment; and a controller electrically connected with the sensor assembly, the compressor of the refrigeration system and the first valve body, the controller being configured to confirm the refrigeration requirements of the first compartment and the second compartment according to the environmental information, and control the first valve body and the compressor to operate according to the refrigeration requirements.

[0006] In a third aspect, the application provides a control method of a refrigerator, applied to the refrigerator of the embodiments of the application, the control method comprising: obtaining environment information of the refrigerator, the environment information comprising a temperature of a first compartment and a temperature of a second compartment; determining a refrigeration demand of the first compartment and a refrigeration demand of the second compartment according to the environment information; and controlling the first valve body and the compressor to operate according to the refrigeration demands.

[0007] According to the refrigeration system, the refrigerator and the control method thereof provided in the embodiments of the application, the first evaporator and the second evaporator are arranged in the refrigeration cycle circuit in a series-parallel manner, and the first valve body with the on-off function and the throttling function is combined with the throttling element for use, so that the refrigerant flow of the refrigeration compartment and the freezing compartment can be reasonably distributed according to the operating condition of the compressor, the system operating energy consumption is reduced while the rapid cooling is realized.

[0008] The above description is only a summary of the technical solutions of the application, in order to enable the technical means of the application to be implemented according to the content of the description, and in order to enable the above and other purposes, characteristics and advantages of the application to be more apparent and easy to understand, the following specific embodiments of the application are described. BRIEF DESCRIPTION OF DRAWINGS

[0009] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a better understanding of the preferred embodiments, and are not to be considered as limiting of the application. Moreover, in the drawings, like reference numerals denote similar parts throughout the several views, wherein:

[0010] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a better understanding of the preferred embodiments, and are not to be considered as limiting of the application. Moreover, in the drawings, like reference numerals denote similar parts throughout the several views, wherein:

[0011] Figure 1 FIG. 1 is a structural schematic diagram of a refrigeration system according to an embodiment of the application;

[0012] Figure 2 FIG. 2 is an exploded structural schematic diagram of the first valve body in the refrigeration system shown in FIG. 1; Figure 1

[0013] Figure 3 FIG. 3 is a structural schematic diagram of a refrigeration system according to another embodiment of the application;

[0014] Figure 4 FIG. 4 is an exploded structural schematic diagram of the first valve body in the refrigeration system shown in FIG. 3; Figure 3

[0015] Figure 5 ​​A flowchart of a control method of a refrigerator according to an embodiment of the present application;

[0016] Figure 6 A detailed flowchart of a control method of a refrigerator according to an embodiment of the present application;

[0017] Figure 7 A detailed flowchart of a control method of a refrigerator according to an embodiment of the present application.

[0018] Reference numerals in the drawings represent the following:

[0019] 10. Refrigeration system;

[0020] 1. Refrigeration assembly; 11. Compressor; 12. Condenser; 13. First evaporator; 14. Second evaporator; 15. First throttling element; 16. Second throttling element; 17. Third evaporator; 18. Third throttling element; 19. One-way check valve;

[0021] 2. Anti-condensation tube;

[0022] 3. Refrigeration cycle circuit; 30. Main line; 31. First refrigerant branch; 32. Second refrigerant branch; 33. Third refrigerant branch; 34. Bypass branch;

[0023] 4. First valve body; 40. First inlet; 41. First outlet; 411. First through-hole; 412. First arc-shaped groove; 42. Second outlet; 421. Second through-hole; 422. Second arc-shaped groove; 43. Valve seat; 44. Valve block;

[0024] 440. Connection portion; 441. First notch; 442. Second notch; 443. Third notch; 45. Third outlet; 451. Third through-hole; 452. Third arc-shaped groove;

[0025] 5. Second valve body; 50. Second inlet; 51. Fourth outlet; 52. Fifth outlet. DETAILED DESCRIPTION

[0026] Exemplary embodiments of the present application will be described in detail below with reference to the accompanying drawings. While exemplary embodiments of the present application are shown in the drawings, it is to be understood that the present application can be embodied in various forms without being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the application to those skilled in the art.

[0027] It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and "has" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order in which they are described, unless specifically identified as an order dependent step. It is also to be understood that additional or alternative steps can be employed.

[0028] Although the terms first, second, third, etc. can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first", "second", and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

[0029] Spatially relative terms, such as "inner", "outer", "beneath", "below", "lower", "above", "upper", and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. Spatially relative terms can be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0030] Figure 1 Structure schematic diagram of a refrigeration system according to an embodiment of the present application.

[0031] Referring to Figure 1The embodiment of the present application provides a refrigeration system 10, comprising a refrigeration assembly 1, a refrigeration cycle circuit 3 and a first valve body 4. The refrigeration system 10 can be applied to a refrigerator, a freezer, a cold storage and various refrigeration equipment.

[0032] The refrigeration assembly 1 comprises a compressor 11, a condenser 12, a first evaporator 13, a second evaporator 14, a first throttling element 15 and a second throttling element 16. The first throttling element 15 and the second throttling element 16 can be, for example but not limited to, a capillary tube.

[0033] The refrigeration cycle circuit 3 comprises a main pipeline 30 and a first refrigerant branch 31 and a second refrigerant branch 32 in communication with the main pipeline 30, the first refrigerant branch 31 and the second refrigerant branch 32 are arranged in parallel, in the flow direction of the refrigerant, the first throttling element 15 and the first evaporator 13 are sequentially arranged in the first refrigerant branch 31, the second throttling element 16 is arranged in the second refrigerant branch 32, the outlet of the first evaporator 13 and the outlet of the second throttling element 16 are in communication with the inlet of the second evaporator 14, and the second evaporator 14, the compressor 11 and the condenser 12 are sequentially arranged in the main pipeline 30.

[0034] The first valve body 4 is arranged at the connection of the first refrigerant branch 31 and the second refrigerant branch 32 and the main pipeline 30, the first valve body 4 has a first inlet 40, a first outlet 41 and a second outlet 42, the first inlet 40 is in communication with the outlet of the condenser 12, the first outlet 41 is in communication with the first refrigerant branch 31, and the second outlet 42 is in communication with the second refrigerant branch 32, the first outlet 41 and the second outlet 42 both have a full opening state, a throttling state and a closed state.

[0035] Taking the refrigerator as an example, for the refrigerator with two or more evaporators, when the power is turned on or the user frequently opens and closes the refrigerator door, or in a high-temperature environment, the temperature of the first compartment and the second compartment quickly rises. In the related art, if the first compartment and the second compartment have a rapid refrigeration request at the same time, a large-flow throttling element is usually used to cool the second compartment, and a small-flow throttling element is used to cool the first compartment, so that the second compartment is quickly cooled to the set temperature, and the refrigeration demand of the first compartment is greater than that of the second compartment, and the problem of uneven distribution of refrigerant flow occurs, and the refrigerant flow cannot be reasonably distributed according to the refrigeration demand of the second compartment and the first compartment, thereby increasing the operating energy consumption.

[0036] In addition, in the related art, the valve body for the refrigerator mostly only has on-off function without throttling function, or an electronic expansion valve is used, which has throttling function but usually has one inlet and one outlet, and cannot realize flow path switching.

[0037] To this end, in the embodiment of the present application, the first valve body 4 has a first inlet 40, a first outlet 41 and a second outlet 42, the first inlet 40 is communicated with the outlet of the condenser 12, the first outlet 41 is communicated with the first refrigerant branch 31, the second outlet 42 is communicated with the second refrigerant branch 32, the first throttling element 15 and the first evaporator 13 are arranged in the first refrigerant branch 31, and the second throttling element 16 is arranged in the second refrigerant branch 32, so that the first evaporator 13 and the second evaporator 14 are arranged in the refrigeration cycle circuit 3 in a series-parallel manner, the first evaporator 13 is used for refrigerating the first compartment, and the second evaporator 14 is used for refrigerating the second compartment. When the first compartment has a refrigeration demand, the first outlet 41 of the first valve body 4 is opened, and the second outlet 42 is closed. The high-temperature and high-pressure gas discharged from the compressor 11 becomes low-temperature and high-pressure liquid after being condensed and radiated by the condenser 12, and then flows through the first valve body 4, and then becomes low-temperature and low-pressure liquid after being hindered, throttled and decompressed by the first throttling element 15. The low-temperature and low-pressure liquid is evaporated and absorbs heat in the first evaporator 13, and then becomes part of low-temperature and low-pressure gas and part of low-temperature and low-pressure liquid. The low-temperature and low-pressure liquid enters the second evaporator 14 to be evaporated and absorb heat, and then becomes low-temperature and low-pressure gas after taking away the heat of the second compartment, and then flows back to the compressor 11 to be compressed into high-temperature and high-pressure gas, thereby completing a refrigeration cycle. When only the second compartment has a refrigeration demand, the second outlet 42 of the first valve body 4 is opened. The high-temperature and high-pressure gas discharged from the compressor 11 becomes low-temperature and high-pressure liquid after being condensed and radiated by the condenser 12, and then flows through the first valve body 4, and then becomes low-temperature and low-pressure liquid after being hindered, throttled and decompressed by the second throttling element 16. The low-temperature and low-pressure liquid is evaporated and absorbs heat in the second evaporator 14, and then becomes low-temperature and low-pressure gas after taking away the heat of the second compartment, and then flows back to the compressor 11 to be compressed into high-temperature and high-pressure gas, thereby completing a refrigeration cycle.

[0038] The first outlet 41 and the second outlet 42 of the first valve body 4 each have a full opening state, a throttling state and a closed state, and have a throttling function in addition to the switching function of the first refrigerant branch 31 and the second refrigerant branch 32. At this time, the first outlet 41 and the second outlet 42 can be switched between the full opening state and the throttling state according to the operating frequency of the compressor 11, and in combination with the first throttling element 15 or the second throttling element 16, four different flow combinations can be achieved. For example, when the first chamber and the second chamber have refrigeration requirements at the same time, if the operating frequency of the compressor 11 is large, the first outlet 41 can be controlled to be in the full opening state to achieve large-flow cooling, and if the operating frequency of the compressor 11 is small, the first outlet 41 can be controlled to be in the throttling state to achieve small-flow energy-saving refrigeration. For example, when only the second chamber has refrigeration requirements, the second outlet 42 can be controlled to be in the full opening state or the throttling state according to the operating frequency of the compressor 11 to achieve large-flow rapid refrigeration or small-flow energy-saving refrigeration. Thus, the refrigerant flow can be reasonably distributed according to the refrigeration requirements of the second chamber and the first chamber, rapid cooling is achieved, and the system operating power consumption is reduced.

[0039] The refrigeration system 10 provided by the embodiment of the present application can reasonably distribute the refrigerant flow of the first chamber and the second chamber according to the operating conditions of the compressor 11 by arranging the first evaporator 13 and the second evaporator 14 in the series-parallel mode in the refrigeration cycle circuit 3 and using the valve body and the throttling element in combination to have the functions of switching and throttling, so that rapid cooling is achieved and the system operating energy consumption is reduced.

[0040] Figure 2 For Figure 1 The exploded structural schematic view of the first valve body in the refrigeration system shown in FIG. 1.

[0041] In some embodiments, the first valve body 4 comprises a valve seat 43 and a valve block 44 arranged coaxially, the bottom surface or side surface of the valve seat 43 is provided with the first inlet 40, the end surface of the valve seat 43 is provided with the first outlet 41 and the second outlet 42 distributed along the circumference, the first outlet 41 comprises a first through hole 411 and a first arc-shaped groove 412 in communication with the first through hole 411, and the second outlet 42 comprises a second through hole 421 and a second arc-shaped groove 422 in communication with the second through hole 421. The valve block 44 comprises a connecting portion 440 provided with a first notch 441 and a second notch 442, the connecting portion 440 is in abutment with the end surface of the valve seat 43 and can rotate relative to the valve seat 43 to selectively communicate the first notch 441 with any one of the first through hole 411 and the first arc-shaped groove 412, and the second notch 442 can selectively communicate with any one of the second through hole 421 and the second arc-shaped groove 422, wherein, when the first notch 441 communicates with the first through hole 411, the first outlet 41 is in a fully open state; when the first notch 441 communicates with the first arc-shaped groove 412, the first outlet 41 is in a throttling state; when the second notch 442 communicates with the second through hole 421, the second outlet 42 is in a fully open state; when the second notch 442 communicates with the second arc-shaped groove 422, the second outlet 42 is in a throttling state; when the connecting portion 440 covers the first outlet 41 except for the first notch 441 and the second notch 442, the first outlet 41 is in a closed state; when the connecting portion 440 covers the second outlet 42 except for the first notch 441 and the second notch 442, the second outlet 42 is in a closed state.

[0042] Referring to Figure 2 , the end surface of the valve seat 43 is a flat matching surface, and the valve block 44 can be in abutment with the end surface of the valve seat 43 and rotate at an angle. The first inlet 40 of the valve seat 43 is arranged on the side surface or the bottom surface of the valve seat 43, and the first outlet 41 is arranged on the end surface of the valve seat 43 and is opened on the circumference with the center axis of the valve seat 43 as the center and a certain length as the radius. The first valve body 4 further comprises a first inlet pipe and a first outlet pipe fixedly connected with the valve seat 43, the first inlet pipe communicates with the first inlet 40, and the first outlet pipe communicates with the first outlet 41, and the first inlet pipe and the first outlet pipe respectively communicate with the refrigeration cycle circuit 3 to meet the needs of the refrigeration system 10.

[0043] The first valve body 4 can further include a control unit and a motor (not shown in the figure), the control unit controls the rotation of the rotor of the motor to drive the valve block 44 to rotate relative to the valve seat 43, the connecting portion 440 of the valve block 44 is used to rotate with the end face of the valve seat 43, when the connecting portion 440 rotates to cover the first outlet 41 of the valve seat 43, the first outlet 41 is in a closed state, and the refrigerant cannot flow out of the first outlet 41. Conversely, when the connecting portion 440 rotates to uncover the first outlet 41, if the first gap 441 corresponds to the first through hole 411 of the first outlet 41, at this time the first outlet 41 is in a fully open state, and the refrigerant directly flows out of the first through hole 411; if the first gap 441 corresponds to the first arc-shaped groove 412 of the first outlet 41, at this time the first outlet 41 is in a throttling state, the refrigerant enters the first through hole 411 and then flows out of the first arc-shaped groove 412, the positional relationship and conduction relationship between the second outlet 42 and the second gap 442 are similar and will not be described again.

[0044] It can be understood that the throttling flow rate of the first outlet 41 depends on the longitudinal sectional area formed by the width and depth of the first arc-shaped groove 412, and the throttling flow rate of the second outlet 42 depends on the longitudinal sectional area formed by the width and depth of the second arc-shaped groove 422. The angles of the first gap 441 and the second gap 442 can be the same or different, and the angles of the first gap 441 and the second gap 442 in the circumferential direction are designed according to specific application scenarios and control logic, which will not be described again.

[0045] It can be understood that the first valve body 4 can also have other structural forms as long as it can realize the functions of on-off and throttling, which is not limited here.

[0046] In some embodiments, the refrigeration cycle circuit 3 further includes a bypass branch 34, and the refrigeration system 10 further includes an anti-condensation pipe 2 and a second valve body 5, the anti-condensation pipe 2 is arranged between the first valve body 4 and the second valve body 5, and the bypass branch 34 is arranged in parallel with the anti-condensation pipe 2, the second valve body 5 has a second inlet 50, a fourth outlet 51 and a fifth outlet 52, the second inlet 50 is communicated with the outlet of the condenser 12, the fourth outlet 51 is communicated with the anti-condensation pipe 2, and the fifth outlet 52 is communicated with the bypass branch 34.

[0047] The anti-condensation pipe 2 can be arranged in the interlayer of the door frame of the refrigerator, or at each cross beam and vertical beam of the door frame, and the high-temperature liquid refrigerant in the anti-condensation pipe 2 flows through each cross beam and vertical beam to heat the surface thereof and balance the temperature difference between the surface and the environment, thereby achieving anti-condensation. The anti-condensation pipe 2 can be a plastic pipe body for circulating refrigerant and other refrigerants, and has high corrosion resistance to prolong the service life.

[0048] When the ambient temperature of the refrigerator is low or the ambient relative humidity is large, the fourth outlet 51 of the second valve body 5 is open and the fifth outlet 52 is closed, and the anti-condensation control is performed through the anti-condensation pipe 2; when the ambient temperature of the refrigerator is high or the ambient relative humidity is small, the fourth outlet 51 of the second valve body 5 is closed and the fifth outlet 52 is open, and the energy-saving operation is performed through the bypass branch 34. The refrigerant is guided to different pipelines by the second valve body 5 under different environmental parameters, heat loss is reduced, and precise anti-condensation management is realized.

[0049] The refrigerator provided by the embodiments of the present application comprises a cabinet, the refrigeration system 10 provided by the embodiments of the present application, a sensor assembly, and a controller.

[0050] The cabinet is provided with a first chamber and a second chamber, the first evaporator 13 of the refrigeration system 10 is arranged in the first chamber for refrigeration, and the second evaporator 14 is arranged in the second chamber; the sensor assembly is used for detecting the environmental information of the refrigerator, and the environmental information comprises the temperature of the first chamber and the temperature of the second chamber; the controller is electrically connected with the sensor assembly, the compressor 11, and the first valve body 4 of the refrigeration system 10, and is configured to confirm the refrigeration requirements of the first chamber and the second chamber according to the environmental information and control the first valve body 4 and the compressor 11 to operate according to the refrigeration requirements.

[0051] Figure 3 FIG. 2 is a structural schematic diagram of the refrigeration system according to another embodiment of the present application.

[0052] In some embodiments, the refrigeration assembly 1 further comprises a third evaporator 17 and a third throttling element, and the refrigeration cycle circuit 3 further comprises a third refrigerant branch 33 in communication with the main pipeline 30, the third refrigerant branch 33 is arranged in parallel with the second refrigerant branch 32, and the third throttling element and the third evaporator 17 are arranged in the third refrigerant branch 33 in sequence in the flow direction of the refrigerant. The first valve body 4 further has a third outlet 45, the third outlet 45 is in communication with the third refrigerant branch 33, and the third outlet 45 has a fully open state, a throttling state, and a closed state.

[0053] Referring to Figure 3The refrigeration system 10 in the embodiment is used in a multi-system refrigerator having a first compartment, a second compartment and a third compartment, and is similar in structure to the refrigeration system 10 of the dual-system refrigerator, except that the first valve body 4 has a first inlet 40, a first outlet 41, a second outlet 42 and a third outlet 45, and the first inlet 40, the first outlet 41, the second outlet 42 and the third outlet 45 all have a fully open state, a throttling state and a closed state, and in addition to the switching function of the first refrigerant branch 31, the second refrigerant branch 32 and the third refrigerant branch 33, also has a throttling function. At this time, the first outlet 41, the second outlet 42 and the third outlet 45 can be switched between the fully open state and the throttling state according to the operating frequency of the compressor 11, and in combination with the first throttling element 15, the second throttling element 16 and the third throttling element, six different flow combinations can be realized. When different compartments have refrigeration requirements at the same time, the specific compartment can be determined according to the priority and refrigerated. For example, when the third compartment has a refrigeration requirement, if the operating frequency of the compressor 11 is large, the third outlet 45 can be controlled to be in the fully open state to achieve large-flow cooling, and if the operating frequency of the compressor 11 is small, the third outlet 45 can be controlled to be in the throttling state to achieve small-flow energy-saving refrigeration; when only the second compartment has a refrigeration requirement or only the first compartment has a refrigeration requirement, and the like, the working principle is similar to that of the refrigeration system 10 of the dual-system refrigerator described above, and will not be described again. Thus, the refrigerant flow can be reasonably distributed according to the refrigeration requirements of the second compartment, the first compartment and the third compartment, so that the system operating power consumption is reduced while rapid cooling is achieved.

[0054] In addition, the first refrigerant branch 31 and the third refrigerant branch 33 are respectively provided with a one-way check valve 19, which is arranged on the outlet side of the first evaporator 13 and the third evaporator 17 respectively, for preventing the backflow of refrigerant.

[0055] Figure 4 For Figure 3 The exploded structural schematic view of the first valve body in the refrigeration system shown in FIG. 1.

[0056] In some embodiments, the first valve body 4 includes a valve seat 43 and a valve block 44 arranged coaxially, the end face of the valve seat 43 is provided with a first inlet 40, a first outlet 41, a second outlet 42 and a third outlet 45 distributed in a circumferential direction, the first outlet 41 includes a first through hole 411 and a first arc-shaped groove 412 in communication with the first through hole 411, the second outlet 42 includes a second through hole 421 and a second arc-shaped groove 422 in communication with the second through hole 421, and the third outlet 45 includes a third through hole 451 and a third arc-shaped groove 452 in communication with the third through hole 451.

[0057] Referring to Figure 4The valve block 44 includes a connecting portion 440 having a first notch 441, a second notch 442 and a third notch 443. The connecting portion 440 is attached to the end face of the valve seat 43 and can rotate relative to the valve seat 43, so that the first notch 441 can selectively communicate with any one of the first through hole 411 and the first arc-shaped groove 412, the second notch 442 can selectively communicate with any one of the second through hole 421 and the second arc-shaped groove 422, and the third notch 443 can selectively communicate with any one of the third through hole 451 and the third arc-shaped groove 452. When the first notch 441 communicates with the first through hole 411, the first outlet 41 is in a fully open state. When the first notch 441 communicates with the first arc-shaped groove 412, the first outlet 41 is in a throttling state. When the second notch 442 communicates with the second through hole 421, the second outlet 42 is in a fully open state. When the second notch 442 communicates with the second arc-shaped groove 422, the second outlet 42 is in a throttling state. When the third notch 443 communicates with the third through hole 451, the third outlet 45 is in a fully open state. When the third notch 443 communicates with the third arc-shaped groove 452, the third outlet 45 is in a throttling state. When the connecting portion 440 covers the first outlet 41, the second outlet 42 and the third outlet 45 respectively except for the first notch 441, the second notch 442 and the third notch 443, the first outlet 41, the second outlet 42 and the third outlet 45 are in a closed state respectively. The angles of the first notch 441, the second notch 442 and the third notch 443 can be the same or different. The angles of the first notch 441, the second notch 442 and the third notch 443 in the circumferential direction are designed according to specific application scenarios and control logic, and will not be described here.

[0058] In this embodiment, the working principle of the first valve body 4 with one inlet and three outlets is similar to that of the first valve body 4 with one inlet and two outlets, which will not be described here.

[0059] It can be understood that the first valve body 4 can also have other structural forms as long as it can realize the functions of on-off and throttling, which is not limited here.

[0060] In some embodiments, the refrigeration cycle circuit 3 further includes a bypass branch 34, and the refrigeration system 10 further includes an anti-condensation pipe 2 and a second valve body 5. The anti-condensation pipe 2 is arranged between the first valve body 4 and the second valve body 5, and the bypass branch 34 is arranged in parallel with the anti-condensation pipe 2. The second valve body 5 has a second inlet 50, a fourth outlet 51 and a fifth outlet 52. The second inlet 50 communicates with the outlet of the condenser 12. The fourth outlet 51 communicates with the anti-condensation pipe 2. The fifth outlet 52 communicates with the bypass branch 34.

[0061] The refrigeration system 10 in the embodiment is used for a multi-system refrigerator having a first compartment, a second compartment and a third compartment. When the ambient temperature of the refrigerator is low or the relative humidity of the environment is large, the fourth outlet 51 of the second valve body 5 is opened and the fifth outlet 52 is closed, and the anti-condensation control is performed through the anti-condensation pipe 2. When the ambient temperature of the refrigerator is high or the relative humidity of the environment is small, the fourth outlet 51 of the second valve body 5 is closed and the fifth outlet 52 is opened, and the energy-saving operation is performed through the bypass branch 34. The refrigerant is guided to different pipelines under different environmental parameters through the second valve body 5, heat loss is reduced, and precise anti-condensation management is realized.

[0062] The embodiment of the application further provides a refrigerator, comprising a cabinet, the refrigeration system 10 of each embodiment of the application, a sensor assembly and a controller. The cabinet is provided with a first compartment, a second compartment and a third compartment. The refrigeration system 10 comprises a first evaporator 13, a second evaporator 14 and a third evaporator 17. The first evaporator 13 is arranged to cool the first compartment. The second evaporator 14 is arranged in the second compartment. The third evaporator 17 is arranged in the third compartment. The environmental information further comprises the temperature of the third compartment. The controller is further configured to confirm the refrigeration requirement of the third compartment according to the environmental information, and control the first valve body 4 and the compressor 11 to operate according to the refrigeration requirement.

[0063] Figure 5 The flow chart of the control method of the refrigerator according to an embodiment of the application is shown.

[0064] Referring to Figure 5 The embodiment of the application provides a control method of a refrigerator, which is applied to the refrigerator of each embodiment of the application. The control method comprises the following steps S1-S3.

[0065] Step S1: Obtain the environmental information of the refrigerator. The environmental information comprises the temperature of the first compartment and the temperature of the second compartment.

[0066] Step S2: Determine the refrigeration requirement of the first compartment and the refrigeration requirement of the second compartment according to the environmental information.

[0067] Step S3: Control the first valve body 4 and the compressor 11 to operate according to the refrigeration requirement.

[0068] Figure 6 The detailed flow chart of the control method of the refrigerator according to an embodiment of the application is shown.

[0069] Referring to Figure 6 In some embodiments, step S3, controlling the first valve body 4 and the compressor 11 to operate according to the refrigeration requirement comprises:

[0070] Step S31: According to the refrigeration requirement of only the second compartment, control the first outlet 41 of the first valve body 4 to be in a closed state.

[0071] Step S32: According to the rotation speed of the compressor 11 being greater than the first rotation speed threshold, controlling the second outlet 42 of the first valve body 4 to be in the fully open state;

[0072] Step S33: According to the rotation speed of the compressor 11 being less than or equal to the first rotation speed threshold, controlling the second outlet 42 of the first valve body 4 to be in the throttling state.

[0073] In some embodiments, the step S3 of controlling the first valve body 4 and the compressor 11 to operate according to the refrigeration demand comprises:

[0074] Step S34: According to there being a refrigeration demand in the first chamber, controlling the second outlet 42 of the first valve body 4 to be in the closed state;

[0075] Step S35: According to the rotation speed of the compressor 11 being greater than the second rotation speed threshold, controlling the first outlet 41 of the first valve body 4 to be in the fully open state;

[0076] Step S36: According to the rotation speed of the compressor 11 being less than or equal to the second rotation speed threshold, controlling the first outlet 41 of the first valve body 4 to be in the throttling state.

[0077] The control method of the refrigerator provided by the embodiments of the present application can reasonably distribute the refrigerant flow of the first chamber and the second chamber according to the operating condition of the compressor 11 by arranging the first evaporator 13 for refrigerating the first chamber and the second evaporator 14 for refrigerating the second chamber in the refrigeration cycle circuit 3 in a series-parallel manner, and by using the first valve body 4 with the on-off and throttling functions in combination with the throttling element, so as to realize rapid cooling while reducing the system operating energy consumption.

[0078] In some embodiments, the refrigeration system 10 of the refrigerator further comprises an anti-condensation pipe 2, a second valve body 5 and a bypass branch 34, the anti-condensation pipe 2 is arranged between the first valve body 4 and the second valve body 5, and the bypass branch 34 is arranged in parallel with the anti-condensation pipe 2, the environmental information further comprises the environmental temperature or the environmental relative humidity of the refrigerator, and the control method further comprises:

[0079] Step S41: According to the environmental temperature being less than or equal to an environmental temperature threshold T1, or according to the environmental relative humidity being less than or equal to a humidity threshold Th1, controlling the fourth outlet 51 of the second valve body 5 to be in the open state and the fifth outlet 52 to be in the closed state;

[0080] Step S42: According to the environmental temperature being greater than the environmental temperature threshold, or according to the environmental relative humidity being greater than the humidity threshold, controlling the fifth outlet 52 of the second valve body 5 to be in the open state and the fourth outlet 51 to be in the closed state.

[0081] In this embodiment, the refrigerant flows to different pipelines under different environmental parameter conditions through the second valve body 5, reducing heat loss, thereby realizing precise anti-condensation management.

[0082] In the related art, the general measure for the problem of rapid cooling of the refrigerator is to increase the power of the compressor 11, thereby increasing the heat exchange amount. This method increases the system pressure and increases the system load, causing the service life of the compressor 11 to be shortened, the reliability to be reduced, and the like. Therefore, in the embodiments of the present application, the temperature of each chamber is monitored by the sensor assembly. When the temperature exceeds the chamber temperature threshold value, the first valve body 4 is switched to the large-flow passage, the refrigerant amount is increased in a manner to rapidly cool, and after the chamber temperature is reduced to the set threshold value, the small-flow passage is switched to ensure normal operation of the equipment. In this way, the energy consumption of the equipment is not affected, and the purpose of rapid cooling is achieved.

[0083] In some embodiments, step S3, controlling the first valve body 4 and the compressor 11 to operate according to the refrigeration demand includes:

[0084] Step S31': according to the refrigeration demand of only the second chamber, controlling the first outlet 41 of the first valve body 4 to be in a closed state;

[0085] According to the temperature of the second chamber being between the first temperature threshold value and the second temperature threshold value, the speed of the compressor 11 is controlled to remain at the current first speed, and the second outlet 42 of the first valve body 4 is controlled to be in a fully open state, wherein the second temperature threshold value is greater than the first temperature threshold value;

[0086] According to the temperature of the second chamber being greater than the second temperature threshold value, the speed of the compressor 11 is controlled to be a second speed, and the second outlet 42 of the first valve body 4 is controlled to be in a fully open state, wherein the second speed is greater than the first speed;

[0087] According to the temperature of the second chamber being less than the first temperature threshold value, the speed of the compressor 11 is controlled to be the first speed, and the second outlet 42 of the first valve body 4 is controlled to be in a throttling state.

[0088] In the embodiment, the first temperature threshold is t1, the second temperature threshold is t2, and t2>t1, the first rotating speed is f1, and the second rotating speed is f2, and f2>f1. When only the second chamber has a refrigeration demand, the first outlet 41 of the first valve body 4 is controlled to be in a closed state. The temperature T1 of the second chamber is detected by the sensor assembly. If t1≤T1≤t2, the rotating speed of the compressor 11 is controlled to remain in the original gear (i.e., the first rotating speed), and the second outlet 42 of the first valve body 4 is controlled to be in a fully open state for rapid cooling; if T1>t2, the second outlet 42 is in a fully open state, and the compressor 11 is in a gear-up process (i.e., the second rotating speed), until t1≤T1≤t2, the compressor 11 is downshifted; if T1<t1, the compressor 11 is restored to the original gear (i.e., the first rotating speed), and the second outlet 42 is in a throttling state, realizing energy-saving operation, avoiding problems such as reduced service life and increased energy consumption caused by long-term gear-up operation of the compressor 11 due to rapid cooling.

[0089] In some embodiments, step S3, controlling the first valve body 4 and the compressor 11 to operate according to the refrigeration demand comprises:

[0090] Step S32’: according to the temperature of the second chamber being less than the difference between the first temperature threshold and the temperature variable and the temperature of the first chamber being greater than the third temperature threshold, the second outlet 42 of the first valve body 4 is controlled to be in a closed state;

[0091] According to the temperature of the first chamber being between the third temperature threshold and the fourth temperature threshold, the rotating speed of the compressor 11 is controlled to remain in the current first rotating speed, and the first outlet 41 of the first valve body 4 is controlled to be in a fully open state, wherein the fourth temperature threshold is greater than the third temperature threshold;

[0092] According to the temperature of the first chamber being greater than the fourth temperature threshold, the rotating speed of the compressor 11 is controlled to be the second rotating speed, and the first outlet 41 of the first valve body 4 is controlled to be in a fully open state;

[0093] According to the temperature of the first chamber being less than the third temperature threshold, the rotating speed of the compressor 11 is controlled to be the first rotating speed, and the first outlet 41 of the first valve body 4 is controlled to be in a throttling state;

[0094] According to the temperature of the first chamber being less than the difference between the third temperature threshold and the temperature variable, and the temperature of the second chamber being between the first temperature threshold and the second temperature threshold, the first outlet 41 of the first valve body 4 is controlled to be closed and the second outlet 42 is controlled to be in a fully open state.

[0095] In this embodiment, the third temperature threshold is t3, the fourth temperature threshold is t4, and the temperature variable is AT, the size of which is set according to the use requirement. After the cooling of the second chamber is completed, it is determined whether the first chamber needs to be cooled rapidly. The temperature T2 of the first chamber is detected by the sensor assembly. If t3≤T2≤t4, the speed of the compressor 11 is maintained at the original gear (i.e., the first speed), and the first outlet 41 of the first valve body 4 is in a fully open state for rapid cooling. If T2>t4, the first outlet 41 is in a fully open state, and the compressor 11 is upshifted (i.e., the second speed), until t3≤T2≤t4, and the compressor 11 returns to the original gear (i.e., the first speed). If T2<t3, the compressor 11 is maintained at the original gear (i.e., the first speed), and the first outlet 41 is in a throttling state, realizing energy-saving operation and avoiding problems such as reduced service life and increased energy consumption caused by long-term upshift operation of the compressor 11 due to rapid cooling. In addition, after the cooling of the first chamber is completed, the first outlet 41 of the first valve body 4 is closed, and it is determined whether the second chamber has the possibility of temperature rise. If t1≤T1≤t2-△T, the second outlet 42 of the first valve body 4 is in a fully open state for rapid cooling, otherwise the second outlet 42 is in a throttling state for regular refrigeration. The purpose of setting AT is to avoid the temperature rise of the first chamber and the start of refrigeration again during the subsequent cooling of the second chamber, so that the machine cannot be stopped.

[0096] In some embodiments, step S3, controlling the operation of the first valve body 4 and the compressor 11 according to the refrigeration requirement includes:

[0097] Step S33’: when the first chamber and the second chamber both have refrigeration requirements, the second outlet 42 of the first valve body 4 is controlled to be in a closed state;

[0098] According to the temperature of the first chamber being between the third temperature threshold and the fourth temperature threshold, the speed of the compressor 11 is maintained at the current first speed, and the first outlet 41 of the first valve body 4 is controlled to be in a fully open state, and the fourth temperature threshold is greater than the third temperature threshold;

[0099] According to the temperature of the first chamber being greater than the fourth temperature threshold, the speed of the compressor 11 is controlled to be the second speed, and the first outlet 41 of the first valve body 4 is controlled to be in a fully open state, wherein the second speed is greater than the first speed;

[0100] According to the temperature of the first chamber being less than the third temperature threshold, the speed of the compressor 11 is controlled to be the first speed, and the first outlet 41 of the first valve body 4 is controlled to be in a throttling state;

[0101] According to the temperature of the first chamber being less than the difference between the third temperature threshold and the temperature variable and the temperature of the second chamber being greater than the first temperature threshold, the first outlet 41 of the first valve body 4 is controlled to be in a closed state;

[0102] According to the temperature of the second chamber being between the first temperature threshold and the second temperature threshold, the rotation speed of the compressor 11 is controlled to remain the current first rotation speed, and the second outlet 42 of the first valve body 4 is controlled to be in the fully open state, wherein the second temperature threshold is greater than the first temperature threshold;

[0103] According to the temperature of the second chamber being greater than the second temperature threshold, the rotation speed of the compressor 11 is controlled to be the second rotation speed, and the second outlet 42 of the first valve body 4 is controlled to be in the fully open state;

[0104] According to the temperature of the second chamber being less than the difference between the first temperature threshold and the temperature variable, the rotation speed of the compressor 11 is controlled to be the first rotation speed, and the second outlet 42 of the first valve body 4 is controlled to be in the throttling state;

[0105] According to the temperature of the first chamber being greater than the third temperature threshold, the first outlet 41 of the first valve body 4 is controlled to be in the fully open state and the second outlet 42 is controlled to be in the closed state.

[0106] In the embodiment, the second chamber and the first chamber both have refrigeration requirements, the first chamber is cooled quickly first, and then the second chamber is cooled quickly, wherein the way of cooling the first chamber or the second chamber quickly is the same as the foregoing, and will not be described again. Before the compressor 11 is stopped, it is checked again whether the temperature of the first chamber returns to be greater than the third temperature threshold t3, if yes, the first outlet 41 is in the fully open state, and large flow cooling is adopted until the temperature of the first chamber returns to be less than the third temperature threshold t3, then the first outlet 41 is controlled to be in the throttling state to perform normal refrigeration, if the temperature of the first chamber is less than the third temperature threshold t3, normal refrigeration is directly restored.

[0107] The control method of the refrigerator in the embodiment of the application, by setting threshold ranges for the temperature of the first chamber and the temperature of the second chamber in advance, when the temperature of the first chamber or the temperature of the second chamber is in the respective threshold range, the compressor 11 is first controlled to remain the current rotation speed for a period of time, large flow is adopted to perform quick refrigeration, if the temperature can be quickly reduced, the rotation speed of the compressor is downshifted, if the temperature cannot be quickly reduced, the rotation speed of the compressor is upshifted, thereby avoiding problems such as reduced service life and increased energy consumption of the compressor 11 caused by long-term upshifting of the compressor 11 due to quick refrigeration.

[0108] It should be noted that the first temperature threshold t1, the second temperature threshold t2, the third temperature threshold t3 and the fourth temperature threshold t4 in the embodiment are not fixed values, the first rotation speed and the second rotation speed can correspond to different gears of the compressor 11 in different embodiments, and can be adjusted according to different products and use environments.

[0109] Figure 7A detailed flow chart of the control method of the refrigerator according to an embodiment of the present application.

[0110] Referring to Figure 7 In some embodiments, the refrigerator further comprises a third chamber, and the refrigeration system 10 further comprises a third evaporator 17 for refrigerating the third chamber. The step S3 of controlling the operation of the first valve body 4 and the compressor 11 according to the refrigeration requirement comprises:

[0111] The step S31 of controlling the first outlet 41 of the first valve body 4 to be in a closed state according to that only the second chamber has a refrigeration requirement.

[0112] The step S32 of controlling the second outlet 42 of the first valve body 4 to be in a fully open state according to that the rotating speed of the compressor 11 is greater than a first rotating speed threshold, and to be in a throttling state according to that the rotating speed of the compressor 11 is less than or equal to the first rotating speed threshold.

[0113] The step S31” of controlling the first outlet 41 and the second outlet 42 of the first valve body 4 to be in a closed state when the first chamber has no refrigeration requirement.

[0114] The step S32” of controlling the third outlet 45 of the first valve body 4 to be in a fully open state according to that the rotating speed of the compressor 11 is greater than a third rotating speed threshold, and to be in a throttling state according to that the rotating speed of the compressor 11 is less than or equal to the third rotating speed threshold.

[0115] The step S34” of controlling the second outlet 42 of the first valve body 4 to be in a closed state and the first outlet 41 and the third outlet 45 to be in a fully open state when the first chamber and the third chamber both have refrigeration requirements.

[0116] In some embodiments, the step S3 of controlling the operation of the first valve body 4 and the compressor 11 according to the refrigeration requirement further comprises:

[0117] The step S35” of controlling the second outlet 42 and the third outlet 45 of the first valve body 4 to be in a closed state when only the first chamber has a refrigeration requirement.

[0118] The step S36” of controlling the first outlet 41 of the first valve body 4 to be in a fully open state according to that the rotating speed of the compressor 11 is greater than a second rotating speed threshold, and to be in a throttling state according to that the rotating speed of the compressor 11 is less than or equal to the second rotating speed threshold.

[0119] In this embodiment, the refrigerator comprises a first chamber, a second chamber and a third chamber. When the second chamber alone requests refrigeration, the first chamber is first detected for request. If there is no request, it means that the third chamber has a request or the second chamber and the third chamber both have a request. At this time, only the third outlet 45 is turned on and runs for a period of time, and then it is judged whether the rotation speed of the compressor 11 is greater than the third rotation speed threshold f3. If yes, the heat load is large at this time, the third outlet 45 is in a full opening state, otherwise the third outlet 45 is in a throttling state. Thus, the precise cooling function of the refrigerator can be realized when the refrigeration demand exists in each chamber, and the product energy efficiency is improved.

[0120] It should be noted that the first rotation speed threshold f1, the second rotation speed threshold f2 and the third rotation speed threshold f3 in this embodiment are not fixed values, and can be adjusted according to different products and use environments.

[0121] In some embodiments, the control method of the refrigerator further comprises:

[0122] Step S51: opening the first valve body 4 before the compressor 11 operates, and controlling the first outlet 41 and / or the second outlet 42 to be in a throttling state;

[0123] Step S52: closing the first valve body 4 after the compressor 11 stops.

[0124] Since the first valve body 4 is started at the same time as the compressor 11, the system pipeline has a pressure difference and the exhaust pressure of the compressor 11 is large, which will impact the first valve body 4, thereby reducing the service life of the first valve body 4. Therefore, in this embodiment, the first valve body 4 is opened in advance before the compressor 11 operates for a preset time, which can be 30S for example. That is, after the first valve body 4 is opened, the compressor 11 is started after a delay of 30S, and at least one of the first outlet 41 and the second outlet 42 of the first valve body 4 is controlled to be in a throttling state. On the one hand, the system pressure can be balanced to avoid damage due to excessive pressure at the moment of starting. On the other hand, the refrigerant flow is saved, and the system power consumption is reduced. When the compressor 11 is in a stopped state, the first valve body 4 is closed again to maintain the pressure difference between the condenser 12 and each evaporator, so as to avoid the refrigerant in the condenser 12 from being vaporized to absorb heat from the outside due to the reduction of pressure, thereby reducing the system energy loss and further achieving the energy saving effect.

[0125] Thus, the control method of the refrigerator in each embodiment of the present application can match the appropriate flow through the first valve body 4 and each throttling element according to the changes of environmental information and other parameters, reasonably distribute the refrigerant flow of the first chamber and the second chamber according to the operating conditions of the compressor 11, and reduce the system operating energy consumption while achieving rapid cooling.

[0126] The above description is only the preferred embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A refrigeration system, characterized in that, include: The refrigeration assembly includes a compressor, a condenser, a first evaporator, a second evaporator, a first throttling element, and a second throttling element; A refrigeration cycle circuit includes a main pipeline and a first refrigerant branch and a second refrigerant branch respectively connected to the main pipeline. The first refrigerant branch and the second refrigerant branch are arranged in parallel. In the direction of refrigerant flow, the first throttling element and the first evaporator are arranged sequentially in the first refrigerant branch, and the second throttling element is arranged in the second refrigerant branch. The outlet of the first evaporator and the outlet of the second throttling element are both connected to the inlet of the second evaporator. The second evaporator, the compressor and the condenser are arranged sequentially in the main pipeline. as well as A first valve body is disposed at the connection between the first refrigerant branch and the second refrigerant branch and the main pipeline. The first valve body has a first inlet, a first outlet and a second outlet. The first inlet is connected to the outlet of the condenser, the first outlet is connected to the first refrigerant branch, and the second outlet is connected to the second refrigerant branch. Both the first outlet and the second outlet have a fully open state, a throttling state and a closed state.

2. The refrigeration system according to claim 1, characterized in that, The first valve body includes a valve seat and a valve block arranged coaxially. The end face of the valve seat is provided with a first inlet, a first outlet and a second outlet that are spaced apart in the circumferential direction. The first outlet includes a first through hole and a first arc-shaped groove communicating with the first through hole. The second outlet includes a second through hole and a second arc-shaped groove communicating with the second through hole. The valve block includes a connecting portion having a first notch and a second notch. The connecting portion is fitted to the end face of the valve seat and is rotatable relative to the valve seat, such that the first notch can selectively communicate with either the first through hole or the first arc-shaped groove, and the second notch can selectively communicate with either the second through hole or the second arc-shaped groove. When the first notch communicates with the first through hole, the first outlet is fully open; when the first notch communicates with the first arc-shaped groove, the first outlet is in a throttling state; when the second notch communicates with the second through hole, the second outlet is fully open; when the second notch communicates with the second arc-shaped groove, the second outlet is in a throttling state; when the remaining portion of the connecting portion (excluding the notch) covers the first outlet, the first outlet is closed; when the remaining portion of the connecting portion (excluding the notch) covers the second outlet, the second outlet is closed.

3. The refrigeration system according to claim 1, characterized in that, The refrigeration assembly further includes a third evaporator and a third throttling element. The refrigeration cycle circuit further includes a third refrigerant branch connected to the main pipeline. The third refrigerant branch is arranged in parallel with the second refrigerant branch. In the direction of refrigerant flow, the third throttling element and the third evaporator are arranged sequentially in the third refrigerant branch. The first valve body also has a third outlet, which is connected to the third refrigerant branch, and the third outlet has a fully open state, a throttling state, and a closed state.

4. The refrigeration system according to claim 3, characterized in that, The first valve body includes a valve seat and a valve block arranged coaxially. The end face of the valve seat is provided with a first inlet, a first outlet, a second outlet and a third outlet that are spaced apart in the circumferential direction. The first outlet includes a first through hole and a first arc-shaped groove communicating with the first through hole. The second outlet includes a second through hole and a second arc-shaped groove communicating with the second through hole. The third outlet includes a third through hole and a third arc-shaped groove communicating with the third through hole. The valve block includes a connecting portion having a first notch, a second notch, and a third notch. The connecting portion is fitted against the end face of the valve seat and is rotatable relative to the valve seat, such that the first notch can selectively communicate with either the first through hole or the first arc-shaped groove; the second notch can selectively communicate with either the second through hole or the second arc-shaped groove; and the third notch can selectively communicate with either the third through hole or the third arc-shaped groove. When the first notch communicates with the first through hole, the first outlet is fully open; when the first notch communicates with the first arc-shaped groove, the first outlet... When the second notch is in a throttling state; when the second notch is connected to the second through hole, the second outlet is in a fully open state; when the second notch is connected to the second arc-shaped groove, the second outlet is in a throttling state; when the third notch is connected to the third through hole, the third outlet is in a fully open state; when the third notch is connected to the third arc-shaped groove, the third outlet is in a throttling state; when the remaining parts of the connecting portion, excluding the first notch, the second notch, and the third notch, respectively cover the first outlet, the second outlet, and the third outlet, the first outlet, the second outlet, and the third outlet are respectively in a closed state.

5. The refrigeration system according to any one of claims 1 to 4, characterized in that, The refrigeration cycle circuit also includes a bypass branch, and the refrigeration system also includes an anti-condensation pipe and a second valve body. The anti-condensation pipe is disposed between the first valve body and the second valve body, and the bypass branch is disposed in parallel with the anti-condensation pipe. The second valve body has a second inlet, a fourth outlet and a fifth outlet. The second inlet is connected to the outlet of the condenser, the fourth outlet is connected to the anti-condensation pipe, and the fifth outlet is connected to the bypass branch.

6. A refrigerator, characterized in that, include: The enclosure contains a first compartment and a second compartment. The refrigeration system according to any one of claims 1-5, wherein the first evaporator of the refrigeration system is disposed in the first compartment, and the second evaporator is disposed in the second compartment; Sensor components are used to detect environmental information of the refrigerator, including the temperature of the first compartment and the temperature of the second compartment; as well as The controller is electrically connected to the sensor assembly, the compressor of the refrigeration system, and the first valve body, respectively. The controller is configured to determine the refrigeration needs of the first compartment and the second compartment based on the environmental information, and control the operation of the first valve body and the compressor based on the refrigeration needs.

7. The refrigerator according to claim 6, characterized in that, The enclosure also includes a third compartment, and the refrigeration system also includes a third evaporator disposed in the third compartment; the environmental information also includes the temperature of the third compartment, and the controller is further configured to determine the refrigeration demand of the third compartment based on the environmental information, and control the operation of the first valve body and the compressor based on the refrigeration demand.

8. A method for controlling a refrigerator, applied to the refrigerator as described in claim 6, characterized in that, The control method includes: Obtain environmental information of the refrigerator, including the temperature of the first compartment and the temperature of the second compartment; The cooling requirements of the first room and the second room are determined based on the environmental information. The operation of the first valve body and compressor is controlled according to the cooling demand.

9. The refrigerator control method according to claim 8, characterized in that, The step of controlling the operation of the first valve body and the compressor according to the cooling demand includes: Only the second compartment has a cooling requirement, so the first outlet of the first valve body is kept closed. If the compressor speed is greater than a first speed threshold, the second outlet of the first valve body is controlled to be fully open; if the compressor speed is less than or equal to the first speed threshold, the second outlet of the first valve body is controlled to be in a throttling state.

10. The refrigerator control method according to claim 8, characterized in that, The step of controlling the operation of the first valve body and the compressor according to the cooling demand includes: When the first compartment has a cooling requirement, the second outlet of the first valve body is kept closed. If the compressor speed is greater than the second speed threshold, the first outlet of the first valve body is controlled to be fully open; if the compressor speed is less than or equal to the second speed threshold, the first outlet of the first valve body is controlled to be in a throttling state.

11. The refrigerator control method according to claim 8, characterized in that, The step of controlling the operation of the first valve body and the compressor according to the cooling demand includes: Only the second compartment has a cooling requirement, so the first outlet of the first valve body is kept closed. Based on the fact that the temperature of the second chamber is between the first temperature threshold and the second temperature threshold, the compressor speed is controlled to maintain the current first speed, while the second outlet of the first valve body is controlled to be fully open, wherein the second temperature threshold is greater than the first temperature threshold. Based on the fact that the temperature of the second chamber is greater than the second temperature threshold, the speed of the compressor is controlled to the second speed, and at the same time the second outlet of the first valve body is controlled to be fully open, wherein the second speed is greater than the first speed; Based on the fact that the temperature of the second chamber is less than the first temperature threshold, the speed of the compressor is controlled to the first speed, and at the same time, the second outlet of the first valve body is controlled to be in a throttling state.

12. The refrigerator control method according to claim 11, characterized in that, The step of controlling the operation of the first valve body and the compressor according to the cooling demand includes: Based on the fact that the temperature of the second chamber is less than the difference between the first temperature threshold and the temperature variable, and the temperature of the first chamber is greater than the third temperature threshold, the second outlet of the first valve body is controlled to be in a closed state. Based on the temperature of the first chamber being between the third and fourth temperature thresholds, the compressor speed is controlled to maintain the first speed, while the first outlet of the first valve body is controlled to be fully open, wherein the fourth temperature threshold is greater than the third temperature threshold. Based on the fact that the temperature of the first chamber is greater than the fourth temperature threshold, the speed of the compressor is controlled to be the second speed, and at the same time the first outlet of the first valve body is controlled to be fully open, wherein the second speed is greater than the first speed; Based on the fact that the temperature of the first chamber is less than the third temperature threshold, the speed of the compressor is controlled to the first speed, and at the same time, the first outlet of the first valve body is controlled to be in a throttling state. Based on the fact that the temperature of the first chamber is less than the difference between the third temperature threshold and the temperature variable, and the temperature of the second chamber is between the first temperature threshold and the second temperature threshold, the first outlet of the first valve body is controlled to be closed and the second outlet is controlled to be fully open.

13. The refrigerator control method according to claim 8, characterized in that, The step of controlling the operation of the first valve body and the compressor according to the cooling demand includes: When both the first and second compartments have a cooling requirement, the second outlet of the first valve body is kept closed. Based on the fact that the temperature of the first chamber is between the third temperature threshold and the fourth temperature threshold, the compressor speed is controlled to maintain the current first speed, while the first outlet of the first valve body is controlled to be fully open, wherein the fourth temperature threshold is greater than the third temperature threshold. Based on the fact that the temperature of the first chamber is greater than the fourth temperature threshold, the speed of the compressor is controlled to be the second speed, and at the same time the first outlet of the first valve body is controlled to be fully open, wherein the second speed is greater than the first speed; Based on the fact that the temperature of the first chamber is less than the third temperature threshold, the speed of the compressor is controlled to the first speed, and at the same time, the first outlet of the first valve body is controlled to be in a throttling state. Based on the fact that the temperature of the first chamber is less than the difference between the third temperature threshold and the temperature variable, and the temperature of the second chamber is greater than the first temperature threshold, the first outlet of the first valve body is controlled to be in a closed state. Based on the fact that the temperature of the second chamber is between the first temperature threshold and the second temperature threshold, the compressor speed is controlled to maintain the current first speed, while the second outlet of the first valve body is controlled to be fully open, wherein the second temperature threshold is greater than the first temperature threshold. Based on the fact that the temperature of the second chamber is greater than the second temperature threshold, the speed of the compressor is controlled to the second speed, and at the same time the second outlet of the first valve body is controlled to be fully open; Based on the difference between the temperature of the second chamber and the first temperature threshold and the temperature variable, the speed of the compressor is controlled to the first speed, and the second outlet of the first valve body is controlled to be in a throttling state. Based on the fact that the temperature of the first chamber is greater than the third temperature threshold, the first outlet of the first valve body is controlled to be fully open and the second outlet is controlled to be closed.

14. The refrigerator control method according to claim 8, characterized in that, The refrigerator further includes a third compartment, and the refrigeration system further includes a third evaporator, which is used to refrigerate the third compartment. Controlling the operation of the first valve body and the compressor according to the refrigeration demand includes: Only the second chamber requires cooling, so the first outlet and the third outlet of the first valve body are both kept closed. If the compressor speed is greater than a first speed threshold, the second outlet of the first valve body is controlled to be fully open; if the compressor speed is less than or equal to the first speed threshold, the second outlet of the first valve body is controlled to be in a throttling state. When only the first room has a cooling requirement, the second and third outlets of the first valve body are both kept closed. If the compressor speed is greater than a second speed threshold, the first outlet of the first valve body is controlled to be fully open; if the compressor speed is less than or equal to the second speed threshold, the first outlet of the first valve body is controlled to be in a throttling state. When the first compartment has no cooling requirement, the first and second outlets of the first valve body are both closed. If the compressor speed is greater than the third speed threshold, the third outlet of the first valve body is controlled to be fully open; if the compressor speed is less than or equal to the third speed threshold, the third outlet of the first valve body is controlled to be in a throttling state. When both the first chamber and the third chamber have a cooling requirement, the second outlet of the first valve body is closed while the first outlet and the third outlet are both fully open.

15. The refrigerator control method according to claim 8, characterized in that, The control method further includes: Before the compressor starts running, the first valve body is opened, and the first outlet and / or the second outlet are controlled to be in a throttling state; after the compressor stops, the first valve body is closed.

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