Refrigeration system, refrigerator and control method therefor

Abstract

The present application belongs to the technical field of refrigeration, and specifically relates to a refrigeration system, a refrigerator and a control method therefor. The refrigeration system comprises: a refrigeration assembly, which comprises a compressor, a condenser, an evaporator and a first throttling element; a refrigeration circuit, in which the refrigeration assembly is arranged, an output end of the compressor being in communication with an input end of the condenser, an output end of the first throttling element being in communication with an input end of the evaporator, and an output end of the evaporator being in communication with the input end of the compressor; and a valve, which comprises an inlet and a first outlet, wherein working states of the first outlet include a fully open state, a throttling state and a closed state. In the present application, it is possible to control the valve to select an appropriate flow rate for the corresponding refrigeration mode on the basis of different environmental working conditions, which is simple in the control logic and low in cost, thereby improving the operation stability and reliability of the refrigerator.

Description

Refrigeration system, refrigerator and control method thereof

[0001] Cross-reference to Related Applications

[0002] This application claims priority to and the benefit of the following patent applications, the entire contents of which are incorporated herein by reference:

[0003] Chinese Patent Application No. 202411369296.4, filed on September 27, 2024, entitled “Refrigeration system, refrigerator and control method thereof” with the China National Intellectual Property Administration. TECHNICAL FIELD

[0004] 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

[0005] When the refrigerator is just powered on or the user frequently opens and closes the refrigerator door, or in a high-temperature environment, the temperature of the refrigeration compartment or the freezing compartment of the refrigerator is relatively high. At this time, the refrigerator needs to be able to quickly cool to the required temperature to avoid affecting the food preservation effect. In the normal refrigeration mode, the refrigerator needs to run with low power consumption. For various complex environmental conditions, the related technology generally realizes through an electronic expansion valve, but the control logic of the electronic expansion valve is complex and the cost is high, which affects the stability and reliability of the refrigerator operation. SUMMARY

[0006] The purpose of the present application is to provide a refrigeration system, a refrigerator and a control method thereof, which can control the valve body to select the flow suitable for the corresponding refrigeration mode according to different environmental conditions, has simple control logic and low cost, and improves the stability and reliability of the refrigerator operation.

[0007] In a first aspect, the present application provides a refrigeration system, comprising: a refrigeration assembly comprising a compressor, a condenser, an evaporator and a first throttling element; a refrigeration cycle circuit, the refrigeration assembly being arranged in the refrigeration cycle circuit, an output end of the compressor being in communication with an input end of the condenser, an output end of the first throttling element being in communication with an input end of the evaporator, and an output end of the evaporator being in communication with an input end of the compressor; a valve body comprising an inlet and a first outlet, the inlet being in communication with an output end of the condenser, and the first outlet being in communication with an input end of the first throttling element, the working state of the first outlet comprising a full-open state, a throttling state and a closed state.

[0008] In a second aspect, the application provides a refrigerator, comprising: a cabinet, a freezing compartment and a refrigerating compartment being arranged in the cabinet; a refrigeration system of the refrigerator as described above, the refrigeration system being configured to refrigerate the refrigerating compartment and the freezing compartment; a sensor assembly configured to detect environmental information of the refrigerator; and a controller being electrically connected with the refrigeration assembly, the valve body and the sensor assembly respectively, the controller being configured to determine a refrigeration mode of the refrigerator according to the environmental information, and control the valve body to work according to the refrigeration mode.

[0009] 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 environmental information of the refrigerator; determining a refrigeration mode of the refrigerator according to the environmental information; and controlling the valve body to work according to the refrigeration mode.

[0010] The refrigerator, the refrigeration system of the refrigerator, and the control method of the refrigerator provided by the embodiments of the application can adjust the rotating speed of the compressor according to different refrigeration modes, and can switch the first outlet of the valve body between different working states by the combination of the valve body and the first throttling element, so as to select a flow suitable for the corresponding refrigeration mode, the control logic is simple and the cost is low, and the stability and reliability of the refrigeration system are improved.

[0011] 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 more clearly understood and 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, the following will specifically describe the embodiments of the application. BRIEF DESCRIPTION OF DRAWINGS

[0012] 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 limitations of the application. Moreover, throughout the drawings, like reference numerals will be used to refer to like components. Among them:

[0013] 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 limitations of the application. Moreover, throughout the drawings, like reference numerals will be used to refer to like components. Among them:

[0014] FIG. 1 is a structural schematic diagram of a refrigeration system according to an embodiment of the application;

[0015] FIG. 2 is an exploded structural schematic diagram of a valve body in the refrigeration system shown in FIG. 1;

[0016] Fig. 3 is a structural schematic diagram of a refrigeration system according to another embodiment of the present application;

[0017] Fig. 4 is an exploded structural schematic diagram of a valve body in the refrigeration system shown in Fig. 3;

[0018] Fig. 5 is a structural schematic diagram of a refrigerator according to an embodiment of the present application;

[0019] Fig. 6 is a flow chart of a control method of a refrigerator according to an embodiment of the present application;

[0020] Fig. 7 is a detailed flow chart of a control method of a refrigerator according to an embodiment of the present application;

[0021] Fig. 8 is a detailed flow chart of a control method of a refrigerator according to another embodiment of the present application;

[0022] Fig. 9 is a detailed flow chart of a control method of a refrigerator according to another embodiment of the present application.

[0023] Reference numerals in the drawings represent the following: 10, refrigeration system; 1, refrigeration assembly; 11, compressor; 12, condenser; 13, evaporator; 14, first throttling element; 15, second throttling element; 2, anti-condensation pipe; 3, refrigeration cycle circuit; 30, main pipe; 31, first refrigerant branch; 32, second refrigerant branch; 4, valve body; 40, inlet; 41, first outlet; 411, through hole; 412, arc-shaped groove; 42, second outlet; 43, valve seat; 44, valve block; 441, connecting portion; 442, notch; 100, refrigerator; 101, refrigeration compartment; 102, freezer compartment. DETAILED DESCRIPTION

[0024] Exemplary embodiments of the present application will be described in detail with reference to the accompanying drawings. Although exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this application will be thorough and complete, and will fully convey the scope of the application to those skilled in the art.

[0025] 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.

[0026] Although the terms first, second, third, and the like 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 example embodiments.

[0027] Spatially relative terms, such as "inner", "outer", "inward", "outward", "lower", "bottom", "top", "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.

[0028] FIG. 1 is a schematic diagram of a refrigeration system according to an embodiment of the present application. Referring to FIG. 1, the refrigeration system 10 according to an embodiment of the present application comprises a refrigeration assembly 1, a refrigeration cycle circuit 3 and a valve body 4. The refrigeration system 10 can be applied to a refrigerator, and can also be applied to a refrigerator cabinet, a cold storage, or other refrigeration equipment. For ease of description, the refrigeration system 10 according to each embodiment of the present application is described by taking the case of being applied to a refrigerator.

[0029] The refrigeration assembly 1 comprises a compressor 11, a condenser 12, an evaporator 13 and a first throttling element 14. The refrigeration assembly 1 is arranged in a refrigeration cycle circuit 3, an output end of the compressor 11 is communicated with an inlet of the condenser 12, an output end of the first throttling element 14 is communicated with an input end of the evaporator 13, and an output end of the evaporator 13 is communicated with an input end of the compressor 11. The first throttling element 14 can be, for example but not limited to, a capillary tube.

[0030] The valve body 4 comprises an inlet 40 and a first outlet 41, the inlet 40 is communicated with an outlet of the condenser 12, and the first outlet 41 is communicated with an input end of the first throttling element 14, and the working state of the first outlet 41 comprises a fully open state, a throttling state and a closed state.

[0031] In this embodiment, the compressor 11, the condenser 12, the valve body 4, the first throttling element 14 and the evaporator 13 are sequentially arranged in the refrigeration cycle circuit 3. The high-temperature and high-pressure gas discharged from the compressor 11 becomes a low-temperature and high-pressure liquid after being condensed and radiated by the condenser 12, and then flows through the valve body 4, and then becomes a low-temperature and low-pressure liquid after being hindered, throttled and depressurized by the first throttling element 14. The low-temperature and low-pressure liquid evaporates and absorbs heat in the evaporator 13, takes away the heat of the freezing compartment, and becomes a low-temperature and low-pressure gas, and then flows back to the compressor 11 to be compressed into a high-temperature and high-pressure gas to complete a refrigeration cycle. The first outlet 41 of the valve body 4 has a fully open state, a throttling state and a closed state.

[0032] The refrigeration mode of the refrigerator can include a fast refrigeration mode and an energy-saving mode. For example, when the refrigerator is just powered on or the user frequently opens and closes the refrigerator door, or in a high-temperature environment, the temperature of the refrigeration compartment or the freezing compartment of the refrigerator is relatively high, and at this time, the refrigerator needs to be able to quickly refrigerate to the required temperature to avoid affecting the food preservation effect. In the energy-saving mode, the refrigerator needs to operate at low power consumption.

[0033] In the related art, in order to realize the fast refrigeration mode, there are mainly two ways: one is to increase the flow rate of the refrigerant by increasing the speed of the compressor to increase the heat exchange amount. However, simply increasing the speed of the compressor will cause the pressure of the evaporator to be too high, the temperature difference of the evaporator to be too large, the operating load of the compressor to be increased, and the service life of the system to be reduced. The other is to increase the refrigerant flow of the throttling device, which can avoid the system pressure being too large and the compressor operating overload, but in the energy-saving mode, the system is stably operated, the evaporation temperature is relatively high, the refrigerant cannot be completely heat exchanged, the compartment cooling speed is slow, and the product energy-saving performance is poor. In addition, the throttling device adopts an electronic expansion valve, the control logic is complex and the cost is high, the more complex the control logic is, the higher the failure complaint rate is, and it is difficult to guarantee the stability of the product, which will have a great negative impact on the image and product competitiveness of the enterprise.

[0034] To this end, in the embodiments of the present application, when the refrigeration compartment needs to enter the rapid cooling mode, or the freezer compartment needs to enter the rapid freezing mode, or the refrigeration compartment needs to enter the rapid cooling mode and the freezer compartment needs to enter the rapid freezing mode, the first outlet 41 of the valve body 4 is in the fully open state, and the large flow of refrigerant can accelerate the cooling speed of the freezer compartment, shorten the cooling time of the freezer compartment, achieve the effect of rapid refrigeration, and at the same time, the rotating speed of the compressor 11 is increased, the flow rate of the refrigerant is increased, the heat exchange amount is increased, the evaporation pressure of the evaporator 13 is reduced by the blocking, flow limiting and pressure reducing effects of the first throttling element 14, the temperature difference is reduced, the complete heat exchange of the refrigerant is realized, the heat exchange efficiency is improved, the system pressure is prevented from being too large or the compressor 11 is prevented from overloading operation, and the service life of the refrigeration system 10 is prolonged.

[0035] When the refrigeration compartment and the freezer compartment are operated in the energy-saving mode, the first outlet 41 of the valve body 4 can be controlled to be in the throttling state, and the refrigeration compartment and the freezer compartment are refrigerated by the small flow of refrigerant, and at the same time, the rotating speed of the compressor 11 is reduced, and the flow rate of the refrigerant is reduced, thereby saving the system power consumption.

[0036] The refrigeration system 10 provided by the embodiments of the present application adjusts the rotating speed of the compressor 11 according to different refrigeration modes by arranging the valve body 4 with the inlet 40 and the first outlet 41 in the refrigeration cycle circuit 3, the working states of the first outlet 41 include the fully open state, the throttling state and the closed state, the first outlet 41 of the valve body 4 is switched between the working states according to different environmental conditions to select the flow suitable for the corresponding refrigeration mode, the combination of the valve body 4 and the first throttling element 14 is used, the control logic is simple and the cost is low, and the stability and reliability of the operation of the refrigeration system 10 are improved.

[0037] FIG. 2 is an exploded structural schematic view of the valve body in the refrigeration system shown in FIG. 1.

[0038] In some embodiments, the 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 the inlet 40 and the first outlet 41 distributed in the circumferential direction, the first outlet 41 includes a through hole 411 and an arc-shaped groove 412 in communication with the through hole 411, and the width of the arc-shaped groove 412 is smaller than the diameter of the through hole 411, the valve block 44 includes a connecting part 441 with a notch 442, the connecting part 441 is attached to the end face of the valve seat 43 and can rotate relative to the valve seat 43, so that the notch 442 can be in communication or disconnected with the first outlet 41, wherein when the notch 442 is in communication with the through hole 411, the first outlet 41 is in the fully open state; when the notch 442 is in communication with the arc-shaped groove 412, the first outlet 41 is in the throttling state, and the size of the throttling flow depends on the longitudinal sectional area formed by the width and depth of the arc-shaped groove 412; when the part of the connecting part 441 other than the notch 442 covers the first outlet 41, the first outlet 41 is in the closed state.

[0039] Referring to FIG. 2, the end surface of the valve seat 43 is a flat mating surface, and the valve block 44 can be attached to the end surface of the valve seat 43 and can rotate at an angle. The inlet 40 and the first outlet 41 of the valve seat 43 are respectively arranged on the end surface of the valve seat 43 and are opened on the circumferences with different lengths as the radii and with the center axis of the valve seat 43 as the center. The valve body 4 further includes an inlet pipe and a first outlet pipe fixedly connected with the valve seat 43, the inlet pipe is in communication with the inlet 40, and the first outlet pipe is in communication with the first outlet 41. The inlet pipe and the first outlet pipe are respectively in communication with the refrigeration cycle circuit 3 to meet the needs of the refrigeration system.

[0040] The valve body 4 can further include a controller and a motor (not shown in the figure), the controller controls the rotor of the motor to drive the valve block 44 to rotate relative to the valve seat 43. The connecting portion 441 of the valve block 44 is used to rotate with the end surface of the valve seat 43. When the connecting portion 441 rotates to cover the first outlet 41 of the valve seat 43 except for the gap 442, 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 441 rotates to not cover the first outlet 41, if the gap 442 corresponds to the through hole 411 of the first outlet 41, at this time the first outlet 41 is in a full open state, and the refrigerant directly flows out of the through hole 411; if the gap 442 corresponds to the arc-shaped groove 412 of the first outlet 41, at this time the first outlet 41 is in a throttling state, and the refrigerant enters the through hole 411 and then flows out of the arc-shaped groove 412.

[0041] It can be understood that the valve body 4 in the embodiment is not limited to the structure shown in the figure, and can also have other different structures, as long as it can meet the requirements of one inlet and one outlet and the working state of the first outlet 41 includes the full open state, the throttling state and the closed state, and the like, which will not be described in detail.

[0042] In some embodiments, the refrigeration system 10 further includes an anti-condensation pipe 2, which can be arranged in the freezer compartment of the refrigerator, or in the refrigeration compartment, or in the freezer compartment and the refrigeration compartment respectively. The anti-condensation pipe 2 can be a plastic pipe body for circulating refrigerant and the like, which has high corrosion resistance and prolongs the service life.

[0043] Optionally, the anti-condensation pipe 2 is arranged on the side of the inlet 40 of the valve body 4. Compared with the related art in which the anti-condensation pipe 2 is arranged on the side of the first outlet 41 of the valve body 4, the temperature of the refrigerant entering the anti-condensation pipe 2 is relatively high, the anti-condensation effect is better, and the loss of cold energy caused by the anti-condensation pipe 2 preventing condensation is reduced, thereby avoiding additional heat from entering the compartment and further reducing the energy consumption of the refrigerator.

[0044] In some embodiments, the refrigeration system 10 further includes a filter arranged between the anti-condensation pipe 2 and the valve body 4, which is used to filter impurities, dust and the like in the refrigerant.

[0045] FIG. 3 is a structural schematic diagram of a refrigeration system of a refrigerator according to another embodiment of the present application. Referring to FIG. 3, the refrigeration system 10 of the refrigerator according to the embodiment of the present application is similar to the refrigeration system 10 shown in FIGS. 1 to 2 in structure, except that the valve body 4 of the refrigeration system 10 comprises an inlet 40, a first outlet 41 and a second outlet 42, the refrigeration assembly 1 further comprises a first throttling element 14 and a second throttling element 15, and the refrigeration cycle circuit 3 comprises a main pipeline 30 and a first refrigerant branch 31 and a second refrigerant branch 32 which respectively communicate with the main pipeline 30. The first throttling element 14 and the second throttling element 15 can be, for example but not limited to, capillary tubes.

[0046] Specifically, the first throttling element 14 is arranged in the first refrigerant branch 31, the second throttling element 15 is arranged in the second refrigerant branch 32, the first outlet 41 communicates with the input end of the first throttling element 14, the second outlet 42 communicates with the input end of the second throttling element 15, and the input end of the evaporator 13 respectively communicates with the output end of the first throttling element 14 and the output end of the second throttling element 15. The valve body 4 comprises the inlet 40, the first outlet 41 and the second outlet 42, the first outlet 41 has a fully open state, a throttling state and a closed state, the second outlet 42 has a fully open state and a closed state, and the flow rate of the second outlet 42 in the fully open state is greater than the flow rate of the first outlet 41 in the fully open state.

[0047] In the embodiment, when the first outlet 41 and the second outlet 42 of the valve body 4 are both in the fully open state, the first refrigerant branch 31 and the second refrigerant branch 32 are both open, the first throttling element 14 and the second throttling element 15 are used in combination with the one-in-two-out valve body 4, and the speed of the compressor 11 is adjusted at the same time, so that the refrigeration system 10 can refrigerate the refrigeration compartment 101 and the freezer compartment 102 at the maximum flow rate, and the refrigerator is in the fast refrigeration mode. When the first outlet 41 of the valve body 4 is in the closed state and the second outlet 42 is in the fully open state, the second refrigerant branch 32 is open, the second throttling element 15 is used in combination with the valve body 4, and the speed of the compressor 11 is adjusted at the same time, so that the refrigeration system 10 can only refrigerate the freezer compartment 102 at a relatively small flow rate, and the refrigerator is in the fast refrigeration mode. When the first outlet 41 of the valve body 4 is in the fully open state and the second outlet 42 is in the closed state, the first refrigerant branch 31 is open, the first throttling element 14 is used in combination with the valve body 4, and the speed of the compressor 11 is adjusted at the same time, so that the refrigeration system 10 can only refrigerate the refrigeration compartment 101 at a relatively small flow rate, and the refrigerator is in the fast refrigeration mode. When the first outlet 41 of the valve body 4 is in the throttling state and the second outlet 42 is in the closed state, the first refrigerant branch 31 is open, the first throttling element 14 is used in combination with the valve body 4, and the speed of the compressor 11 is adjusted at the same time, so that the refrigeration system 10 can refrigerate the refrigeration compartment 101 and the freezer compartment 102 at the minimum throttling flow rate, and the system power consumption is saved, and the refrigerator is in the energy-saving mode.

[0048] FIG. 4 is an exploded structural schematic view of the valve body in the refrigeration system shown in FIG. 3.

[0049] In some embodiments, the valve body 4 comprises a valve seat 43 and a valve block 44 arranged coaxially, the end face of the valve seat 43 is provided with an inlet 40, a first outlet 41 and a second outlet 42 distributed in the circumferential direction, the first outlet 41 comprises a through hole 411 and an arc-shaped groove 412 in communication with the through hole 411, and the width of the arc-shaped groove 412 is smaller than the diameter of the through hole 411, the cross-sectional area of the second outlet 42 is larger than that of the through hole 411, the valve block 44 comprises a connecting part 441 with a notch 442, the connecting part 441 is attached to the end face of the valve seat 43 and can rotate relative to the valve seat 43, so that the notch 442 can selectively communicate with the first outlet 41 or the second outlet 42, wherein when the notch 442 communicates with the through hole 411 of the first outlet 41, the first outlet 41 is in the fully open state; when the notch 442 communicates with the arc-shaped groove 412 of the first outlet 41, the first outlet 41 is in the throttling state; when the notch 442 communicates with the second outlet 42, the second outlet 42 is in the fully open state; when the connecting part 441 covers the first outlet 41 or the second outlet 42 except the notch 442, the first outlet 41 or the second outlet 42 is in the closed state.

[0050] Referring to Fig. 4, the end surface of the valve seat 43 is a flat mating surface, and the valve block 44 can be attached to the end surface of the valve seat 43 and can rotate at an angle. The inlet 40, the first outlet 41 and the second outlet 42 of the valve seat 43 are arranged on the end surface of the valve seat 43 and are arranged on the circumferences with different lengths of radiuses and at a certain distance from the center axis of the valve seat 43. The valve body 4 further comprises an inlet pipe, a first outlet pipe and a second outlet pipe fixedly connected with the valve seat 43. The inlet pipe is in communication with the inlet 40, the first outlet pipe is in communication with the first outlet 41, and the second outlet pipe is in communication with the second outlet 42. The inlet pipe, the first outlet pipe and the second outlet pipe are in communication with the refrigeration cycle circuit 3, respectively, and can make various combinations of throttled flow to meet the requirements of the refrigeration system.

[0051] In the embodiment, the first outlet 41 of the valve body 4 has the same functions as the first outlet 41 of the valve body 4 shown in Fig. 2, and will not be described again. The controller controls the rotor of the motor to drive the valve block 44 to rotate on the end surface of the valve seat 43, so that the connecting portion 441 of the valve block 44 is attached to the end surface of the valve seat 43, and the notch 442 of the valve block 44 selectively communicates with the first outlet 41 and the second outlet 42 to realize switching of the refrigerant flow path. Here, "selectively communicating" can be one-way communication, simultaneous communication or no communication.

[0052] It can be understood that the valve body 4 in the embodiment is not limited to the structure shown in the figure, and can have other different structures, as long as it can meet the requirements that the refrigeration system is one-inlet and two-outlet, the working state of the first outlet 41 includes the full open state, the throttling state and the closed state, and the full open flow of the second outlet 42 is greater than that of the first outlet 41, and will not be described again.

[0053] It should be noted that the refrigeration system 10 of each embodiment of the present application is not limited to be applied to a refrigerator, but can also be applied to a freezer, a cold storage and various devices requiring refrigeration, and will not be described again.

[0054] Fig. 5 is a structural schematic view of a refrigerator according to an embodiment of the present application. Referring to Fig. 5, the present application further provides a refrigerator comprising a cabinet, a refrigeration system 10 according to an embodiment of the present application, a sensor assembly and a controller.

[0055] The cabinet is provided with a refrigeration compartment 101 and a freezing compartment 102, and the refrigeration system 10 is arranged in the main body portion and is used for refrigerating the refrigeration compartment 101 and the freezing compartment 102. The valve body 4 in the refrigeration system 10 can comprise the inlet 40 and the first outlet 41, or can comprise the inlet 40, the first outlet 41 and the second outlet 42. The working state of the first outlet 41 includes the full open state, the throttling state and the closed state, the working state of the second outlet 42 includes the full open state and the closed state, and the flow of the second outlet 42 in the full open state is greater than that of the first outlet 41 in the full open state.

[0056] The sensor assembly is configured to detect environmental information of the refrigerator. The environmental information can include an ambient temperature of the refrigerator, a first compartment temperature of the refrigeration compartment, and a second compartment temperature of the freezing compartment.

[0057] The controller is electrically connected with the refrigeration assembly 1, the sensor assembly, and the valve body 4, respectively. The controller is configured to determine a refrigeration mode of the refrigerator according to the environmental information and control the valve body 4 to work according to the refrigeration mode.

[0058] The control method of the refrigerator according to an embodiment of the present application is applied to the refrigerator provided by any of the foregoing embodiments.

[0059] FIG. 6 is a flow chart of a control method of a refrigerator according to an embodiment of the present application. As shown in FIG. 6, the control method of the refrigerator includes:

[0060] Step S1: obtaining environmental information of the refrigerator;

[0061] Step S2: determining a refrigeration mode of the refrigerator according to the environmental information;

[0062] Step S3: controlling the valve body 4 to work according to the refrigeration mode.

[0063] In some embodiments, the environmental information includes a first compartment temperature of the refrigeration compartment 101 and a second compartment temperature of the freezing compartment 102. In step S2, determining the refrigeration mode of the refrigerator according to the environmental information includes:

[0064] Step S21: obtaining a first compartment temperature difference according to a difference between the first compartment temperature and a first temperature preset value and a second compartment temperature difference according to a difference between the second compartment temperature and a second temperature preset value.

[0065] Step S22: determining the refrigeration mode of the refrigerator as a fast refrigeration mode according to that the first compartment temperature difference is greater than a first temperature difference threshold value and / or the second compartment temperature difference is greater than a second temperature difference threshold value.

[0066] Step S23: determining the refrigeration mode of the refrigerator as an energy-saving mode according to that the first compartment temperature difference is less than or equal to the first temperature difference threshold value and the second compartment temperature difference is less than or equal to the second temperature difference threshold value.

[0067] The first temperature preset value of the refrigeration compartment 101 can be, for example, 2-4℃, and the second temperature preset value of the freezing compartment 102 can be, for example, -15- -18℃. The first temperature difference threshold value ΔT1 of the refrigeration compartment 101 and the second temperature difference threshold value ΔT2 of the freezing compartment 102 are generally greater than 3℃, the system enters an overload state, and enters the fast refrigeration and freezing mode. The first temperature difference threshold value ΔT1 and the second temperature difference threshold value ΔT2 can be equal or not equal. For example, the first temperature difference threshold value ΔT1 can be 4℃, and the second temperature difference threshold value ΔT2 can be 5℃.

[0068] Fig. 7 is a detailed flowchart of the control method of the refrigerator shown in Fig. 6. Referring to Fig. 7, the refrigeration assembly 1 of the refrigerator includes the compressor 11. After the refrigerator is powered on, the refrigeration system 10 periodically judges the temperatures of the refrigeration compartment 101 and the freezing compartment 102 in turn.

[0069] In some embodiments, in step S3, controlling the valve body 4 to work according to the refrigeration mode includes:

[0070] Step S31: in the fast refrigeration mode, the first outlet 41 is controlled to be in the fully open state;

[0071] According to the first compartment temperature difference being greater than the first temperature difference threshold AT1 and the second compartment temperature difference being greater than the second temperature difference threshold AT2, the compressor 11 is controlled to increase from the current speed to the first speed R1;

[0072] According to the first compartment temperature difference being less than or equal to the first temperature difference threshold AT1 and the second compartment temperature difference being greater than the second temperature difference threshold AT2, the compressor 11 is controlled to change from the current speed to the second speed R2;

[0073] According to the first compartment temperature difference being greater than the first temperature difference threshold AT1 and the second compartment temperature difference being less than or equal to the second temperature difference threshold AT2, the compressor 11 is controlled to change from the current speed to the third speed R3;

[0074] Step S32: in the energy-saving mode, the first outlet 41 is controlled to be in the throttling state, and the compressor 11 is controlled to change from the current speed to the fourth speed R4, wherein the first speed R1, the second speed R2, the third speed R3, and the fourth speed R4 decrease in turn, i.e., R1>R2>R3>R4.

[0075] According to the first compartment temperature difference being greater than the first temperature difference threshold AT1 and the second compartment temperature difference being greater than the second temperature difference threshold AT2, at this time, the refrigeration compartment 101 needs to quickly enter the fast refrigeration mode, and the freezing compartment 102 needs to quickly enter the fast freezing mode, and the refrigerator needs a relatively large refrigeration capacity, so the first outlet 41 needs to be controlled to be in the fully open state, and the speed of the compressor 11 needs to be adjusted to the maximum first speed R1.

[0076] According to the first compartment temperature difference being less than or equal to the first temperature difference threshold AT1 and the second compartment temperature difference being greater than the second temperature difference threshold AT2, the first outlet 41 is controlled to be in the fully open state, and the compressor 11 is controlled to change from the current speed to the second speed R2. At this time, the refrigeration compartment does not need to quickly enter the fast refrigeration mode, only the freezing compartment 102 needs to quickly enter the fast freezing mode, and the refrigerator needs a relatively small refrigeration capacity, so the first outlet 41 needs to be controlled to be in the fully open state, and the speed of the compressor 11 needs to be adjusted to the slightly smaller second speed R2.

[0077] According to the first chamber temperature difference being greater than the first temperature difference threshold AT1 and the second chamber temperature difference being less than or equal to the second temperature difference threshold AT2, the first outlet 41 is controlled to be in a fully open state, and the compressor 11 is controlled to change from the current speed to a third speed R3. At this time, the refrigeration compartment 101 needs to quickly enter the rapid cooling mode, and the freezing compartment 102 does not need to enter the rapid freezing mode, and the refrigerator needs less refrigeration capacity, and the first outlet 41 needs to be controlled to be in the fully open state, and the speed of the compressor 11 needs to be adjusted to the third speed R3 which is smaller.

[0078] According to the first chamber temperature difference being less than or equal to the first temperature difference threshold AT1 and the second chamber temperature difference being less than or equal to the second temperature difference threshold AT2, the first outlet 41 is controlled to be in a throttling state, and the compressor 11 is controlled to change from the current speed to a fourth speed. At this time, the refrigeration compartment 101 does not need to enter the rapid cooling mode, and the freezing compartment 102 does not need to enter the rapid freezing mode, and the refrigerator needs the least refrigeration capacity, and the first outlet 41 can be controlled to be in the throttling state, and the compressor 11 can be controlled to change from the current speed to the fourth speed R4 which is the smallest.

[0079] When the refrigeration system 10 continues to operate for a first time, the temperature difference of the refrigeration compartment 101 and the temperature difference of the freezing compartment 102 are repeatedly detected until the respective preset temperatures are reached, and the rapid cooling mode and the rapid freezing mode are exited to enter the energy-saving mode. When the first chamber temperature difference of the refrigeration compartment 101 and the second chamber temperature difference of the freezing compartment 102 are both less than 0℃, and the actual temperature of the refrigeration compartment 101 reaches the first temperature preset value and the actual temperature of the freezing compartment 102 reaches the second temperature preset value, the refrigeration system 10 of the refrigerator does not need to refrigerate, and the valve body 4 is closed after continuing to operate for a second time, and the refrigeration system 10 is in a pressure maintaining state, and the compressor 11 stops rotating. The refrigeration system 10 in the pressure maintaining state can maintain a certain pressure difference between the condenser 12 and the evaporator 13, and a back gas temperature can be generated at the inlet 40 of the valve body 4, thereby reducing the energy loss when the compressor 11 stops. In this way, the compressor 11 can be stably operated at a lower power consumption when starting, thereby achieving the energy-saving goal.

[0080] It can be understood that the first temperature difference threshold AT1, the second temperature difference threshold AT2, and the speeds R1, R2, R3 and R4 of the compressor 11 in the embodiment are not fixed values, and can be adjusted according to different products and use environments, which will not be described herein.

[0081] The control method of the refrigerator in the embodiment can improve the refrigeration efficiency of the refrigerator in the rapid refrigeration mode, shorten the cooling time, reduce the running energy consumption of the refrigerator in the energy-saving mode, and improve the energy-saving performance of the refrigerator by the combination of the valve body 4 with one inlet and one outlet and the throttling function and the first throttling element 14, and by adjusting the speed range of the compressor 11.

[0082] It can be understood that the control method of the refrigerator provided by the embodiments of the present application is not only applicable to the one-in-one-out valve body 4, but also applicable to the one-in-two-out valve body 4, and only the second outlet 42 of the valve body 4 needs to be closed.

[0083] FIG. 8 is a detailed flowchart of another control method of a refrigerator according to FIG. 6. Referring to FIG. 8, in some embodiments, the refrigeration assembly 1 of the refrigerator includes a compressor 11, and the step S3 of controlling the valve body 4 to work according to the refrigeration mode includes steps S31' to S32', which are as follows.

[0084] Step S31': In the fast refrigeration mode, the first return gas temperature at the inlet 40 of the valve body 4 is obtained every preset time interval; the fast refrigeration mode can be the fast cooling mode of the refrigeration compartment 101, the fast freezing mode of the freezing compartment 102, or the fast cooling mode of the refrigeration compartment 101 and the fast freezing mode of the freezing compartment 102 at the same time.

[0085] Step S32': According to the first return gas temperature being less than or equal to the first return gas temperature threshold T1, the first outlet 41 is controlled to be alternately switched between the fully open state and the closed state, wherein the time for the first outlet 41 to alternately operate in the fully open state and the closed state for one cycle is a first preset time t, the time for the first outlet 41 to operate in the fully open state is a first time t1, the first return gas temperature is less than or equal to the first return gas temperature threshold T1 for i times, and the first time t1=t-△t1×(i-1),△t1 is a time increment, i is a natural number, i≤t / △t1,△t1>0, t>t1>0.

[0086] In this embodiment, the first return gas temperature threshold T1 is a preset value of the return gas temperature in the fast cooling mode, which can be the ambient dew point temperature, for example, T1 = 22-25°C. The first outlet 41 of the valve body 4 is alternately switched between the fully open state and the closed state, and the first duration t1 of the first outlet 41 in the fully open state is gradually reduced in equal amounts according to the number of times that the first return gas temperature is less than or equal to the first return gas temperature threshold T1. For example, the first outlet 41 is alternately operated in the fully open state and the closed state for a first preset duration t = 90s, the time increment At1 is 5s, i≤18 times, when the first return gas temperature is less than or equal to the first return gas temperature threshold T1 for the first time, the first outlet 41 is opened for t1 = 90s and then closed, the preset time interval can be 2s, the first return gas temperature at the inlet 40 of the valve body 4 is obtained again, if the first return gas temperature is less than or equal to the first return gas temperature threshold T1 for the second time, the first outlet 41 is opened for t1 = 85s and then closed, 2s later, the first return gas temperature at the inlet 40 of the valve body 4 is obtained again, if the first return gas temperature is less than or equal to the first return gas temperature threshold T1 for the third time, the first outlet 41 is opened for t1 = 80s and then closed, if the first return gas temperature is greater than the first return gas temperature threshold T1, the first outlet 41 is opened for t1 = 90s and then closed, and so on, until the first return gas temperature is greater than the first return gas temperature threshold T1. It is determined whether there is a fast cooling demand for the refrigeration system 10, and if it is determined that there is no fast cooling demand, the valve body 4 is closed.

[0087] Therefore, in the control method of the refrigerator of the embodiment of the present application, in the fast cooling mode, the first outlet 41 of the valve body 4 is alternately switched between the fully open state and the closed state, and the first duration t1 of the first outlet 41 in the fully open state is gradually reduced in equal amounts according to the number of times that the first return gas temperature is less than or equal to the first return gas temperature threshold, so as to achieve fast cooling. After the refrigeration system 10 operates for a third time, it is determined whether there is a fast cooling demand for the refrigeration system 10, and if it is determined that there is no fast cooling demand, the valve body 4 is closed, the fast cooling mode is exited, and the energy-saving mode is entered.

[0088] After the valve body 4 is closed when the compressor 11 is stopped, liquid refrigerant may accumulate before the inlet 40 of the valve body 4. At the moment when the compressor 11 is started again, the valve body 4 is opened, and a large amount of accumulated liquid refrigerant rushes into the evaporator 13, the return gas temperature at the inlet 40 of the valve body 4 drops sharply, and the liquid refrigerant that is not completely evaporated enters the evaporator 13, which causes the risk of liquid strike of the compressor 11.

[0089] Therefore, in step S3 of the control method of the refrigerator of the embodiment of the present application, the valve body 4 is controlled to work according to the refrigeration mode, which includes the following steps S33'-S35', and is specifically as follows:

[0090] Step S33': in the energy-saving mode, a second return gas temperature at the inlet 40 of the valve body 4 is obtained;

[0091] Step S34': according to the second return gas temperature being less than or equal to a second return gas temperature threshold T2, the first outlet 41 of the valve body 4 is controlled to be switched between the fully open state and the closed state alternately, wherein a second preset time length t' for one cycle of the first outlet 41 being switched between the fully open state and the closed state alternately is t', a second time length t2 for the first outlet 41 being in the fully open state is t2, and t2

[0092] Step S35': according to the second return gas temperature being greater than the second return gas temperature threshold T2, the first outlet 41 is controlled to be switched between the fully open state and the closed state alternately, wherein a third time length t3 for the first outlet 41 being in the fully open state is t3, and t3>t2.

[0093] In this embodiment, the second return gas temperature threshold T2 is a preset value of the return gas temperature in the energy-saving mode, which can be the ambient dew point temperature, for example, T2=22-25℃. The second preset time length t' for one cycle of the first outlet 41 being switched between the fully open state and the closed state alternately can be 90S, for example. When the compressor 11 is just started, in order to prevent a large amount of liquid refrigerant accumulated in front of the inlet 40 of the valve body 4 from entering the evaporator 13 without being fully evaporated to cause liquid impact of the compressor, the first outlet 41 is controlled to be switched between the fully open state and the closed state alternately, and the second time length t2 for the first outlet 41 being in the fully open state is t2, which can be 10S, for example. Therefore, the time for the first outlet 41 being in the closed state is 80S. When the second return gas temperature increases, the third time length t3 for the first outlet 41 being in the fully open state is increased to t3, which can be 25S, for example. Therefore, the time for the first outlet 41 being in the closed state is 65S. At this time, the proportion of liquid refrigerant entering the evaporator 13 increases, for example, the proportion of liquid refrigerant can reach 92-95%, thereby promoting the refrigerant in the evaporator 13 to be fully evaporated, effectively reducing the risk of liquid impact of the compressor 11, ensuring that the refrigeration compartment 101 and the freezer compartment 102 can be cooled down quickly at the same time, improving the cooling effect, and reducing the power consumption when starting.

[0094] The refrigeration system 10 adopts the first throttling element 14 as the throttling element. In the latter half of the first throttling element 14, liquid refrigerant will emit gas, so that the refrigerant entering the evaporator 13 is in a mixed state of liquid refrigerant and gaseous refrigerant, generally with a proportion of 90% of liquid refrigerant and 10% of gaseous refrigerant. The small proportion of liquid refrigerant makes the refrigerant in the evaporator 13 unable to be fully evaporated, resulting in poor refrigeration effect.

[0095] Therefore, in some embodiments, the control method of the refrigerator also includes:

[0096] Step S36': according to the first chamber temperature being less than or equal to the first temperature preset value and the second chamber temperature being greater than the second temperature preset value, the first outlet 41 is controlled to be switched between the fully open state and the closed state alternately, wherein the first outlet 41 runs in the fully open state for a fourth time length t4, and t4 < t2.

[0097] When the first chamber temperature of the refrigeration chamber 101 is less than or equal to the first temperature preset value, and the second chamber temperature is greater than the second temperature preset value, the refrigeration chamber 101 has no refrigeration demand, only the freezing chamber 102 has refrigeration demand, and the total refrigeration demand is reduced. At this time, the running time of the first outlet 41 in the fully open state is reduced to the fourth time length t4, which can be 20S for example, and the closing time of the first outlet 41 is 70S. The closing time of the first outlet 41 is longer, so that more liquid refrigerant accumulates on the side of the inlet 40 of the valve body 4. Therefore, the proportion of liquid refrigerant entering the evaporator 13 through the first throttling element 14 is larger when the first outlet 41 of the valve body 4 runs in the fully open state. For example, the proportion of liquid refrigerant can be more than 95%. The evaporation of liquid refrigerant in the evaporator 13 is more sufficient, which improves the refrigeration effect while reducing the system operation energy consumption.

[0098] It should be noted that the first return gas temperature threshold T1, the second return gas temperature threshold T2, the first time length t1, the second time length t2, the third time length t3, the fourth time length t4, the first preset time length t and the second preset time length t' are not fixed values and can be adjusted according to different products and use environments, which will not be described here.

[0099] It can be understood that the control method of the refrigerator provided by the embodiments of the present application is not only applicable to the one-in-one-out valve body 4, but also applicable to the one-in-two-out valve body 4, as long as the second outlet 42 of the valve body 4 is closed.

[0100] FIG. 9 is a detailed flowchart of another control method of the refrigerator shown in FIG. 6. As shown in FIG. 9, the control method of the refrigerator of the embodiments of the present application is applied to the refrigerator of the embodiments of the present application. The control method of the refrigerator is similar to the control methods shown in FIGS. 6 to 8. The difference is that the priority of judging the ambient temperature of the refrigerator is the highest, and the priority of judging the first chamber temperature difference of the refrigeration chamber 101 or the second chamber temperature difference of the freezing chamber 102 or the rotating speed condition of the compressor 11 is the second.

[0101] Specifically, the environment information further includes the ambient temperature of the refrigerator. In step S2, determining the refrigeration mode of the refrigerator according to the environment information includes:

[0102] Step S21": when the ambient temperature is greater than the ambient temperature preset value, determining the refrigeration mode of the refrigerator as the fast refrigeration mode;

[0103] Step S22'': when the ambient temperature is less than or equal to the ambient temperature preset value, according to the first compartment temperature difference being greater than the first temperature difference threshold value and / or the second compartment temperature difference being greater than the second temperature difference threshold value, determining that the refrigeration mode of the refrigerator is the fast refrigeration mode.

[0104] Step S23'': when the ambient temperature is less than or equal to the ambient temperature preset value, according to the first compartment temperature difference being less than or equal to the first temperature difference threshold value and the second compartment temperature difference being less than or equal to the second temperature difference threshold value, determining that the refrigeration mode of the refrigerator is the energy-saving mode.

[0105] In this embodiment, the priority of judging the ambient temperature of the refrigerator is higher than that of judging the compartment temperature difference or the rotating speed condition of the compressor. When the ambient temperature is greater than the ambient temperature preset value, for example, in the summer high-temperature period, the temperature preset value can be, for example, 38°C or higher. At this time, the working environment of the system is the worst, and there is no need to judge the compartment temperature difference or the rotating speed of the compressor, and the refrigerator directly enters the fast refrigeration mode. When the ambient temperature is less than or equal to the ambient temperature preset value, and the first compartment temperature difference of the refrigeration compartment is greater than the first temperature difference threshold value AT1, or the second compartment temperature difference of the freezing compartment is greater than the second temperature difference threshold value AT2, the refrigerator enters the fast refrigeration mode. At this time, the working environment of the system is relatively poor. When the first compartment temperature difference of the refrigeration compartment is less than or equal to the first temperature difference threshold value AT1, or the second compartment temperature difference of the freezing compartment is less than or equal to the second temperature difference threshold value AT2, the refrigerator enters the energy-saving mode.

[0106] In some embodiments, in step S3, controlling the valve body 4 to work according to the refrigeration mode includes:

[0107] Step S31'': in the fast refrigeration mode, according to the rotating speed of the compressor 11 being greater than or equal to the first rotating speed threshold value F1, controlling at least one of the first outlet 41 and the second outlet 42 to be in the fully open state.

[0108] Step S32'': in the energy-saving mode, according to the rotating speed of the compressor 11 being less than the first rotating speed threshold value F1, controlling the first outlet 41 to be in the throttling state and the second outlet 42 to be in the closed state.

[0109] In the fast refrigeration mode, according to the different refrigeration requirements of the refrigeration compartment 101 and the freezing compartment 102, the rotating speed of the compressor 11 can be set to different gears. When the rotating speed of the compressor 11 is greater than or equal to the first rotating speed threshold value F1, for example, the first rotating speed threshold value F1 can be 2200 revolutions / minute, at least one of the first outlet 41 and the second outlet 42 of the valve body 4 is in the fully open state, and the purpose of fast refrigeration is achieved. In the energy-saving mode, the rotating speed of the compressor 11 is less than the first rotating speed threshold value F1, the first outlet 41 is in the throttling state and the second outlet 42 is in the closed state, and the system power consumption is saved.

[0110] In some embodiments, in step S31”, in the fast cooling mode, according to the rotation speed of the compressor 11 being greater than or equal to the first rotation speed threshold F1, at least one of the first outlet 41 and the second outlet 42 is controlled to be in the fully open state, including:

[0111] Step S311”: when the ambient temperature is greater than the ambient temperature preset value, according to the rotation speed of the compressor 11 being greater than the second rotation speed threshold F2, the first outlet 41 and the second outlet 42 are both controlled to be in the fully open state, the second rotation speed threshold F2 is greater than the first rotation speed threshold;

[0112] Step S312”: according to the rotation speed of the compressor 11 being less than or equal to the second rotation speed threshold F2 and greater than or equal to the first rotation speed threshold F1, the first outlet 41 is controlled to be in the closed state and the second outlet 42 is controlled to be in the fully open state;

[0113] Step S313”: when the ambient temperature is less than or equal to the ambient temperature preset value, according to the rotation speed of the compressor 11 being less than or equal to the second rotation speed threshold F2 and greater than or equal to the first rotation speed threshold F1, the first outlet 41 is controlled to be in the fully open state and the second outlet 42 is controlled to be in the closed state.

[0114] In this embodiment, in the fast cooling mode, when the ambient temperature is greater than the temperature preset value, for example, 38℃ or above, the rotation speed of the compressor 11 is greater than or equal to the second rotation speed threshold F2, for example, 4200rpm, the first compartment temperature difference of the refrigeration compartment 101 and the second compartment temperature difference of the freezer compartment 102 are both large, the working environment of the system is the worst, and the flow of the valve body 4 needs to be adjusted to the maximum state. At this time, the first outlet 41 and the second outlet 42 can be adjusted to the fully open state, and the refrigeration system 10 performs refrigeration through the valve body 4 at the maximum flow to ensure that the refrigeration compartment 101 of the refrigerator quickly enters the fast cooling mode, and the freezer compartment 102 quickly enters the fast freezing mode.

[0115] When the ambient temperature is greater than the temperature preset value, when the rotation speed of the compressor 11 is in the rotation speed range [F1, F2], the first compartment temperature difference of the refrigeration compartment 101 and the second compartment temperature difference of the freezer compartment 102 are relatively small. At this time, the first outlet 41 can be controlled to be in the closed state and the second outlet 42 can be controlled to be in the fully open state, and the flow of the valve body 4 is adjusted to a slightly smaller state to ensure that the refrigeration compartment 101 of the refrigerator quickly enters the fast cooling mode, and the freezer compartment 102 quickly enters the fast freezing mode.

[0116] When the ambient temperature is less than or equal to the ambient temperature preset value, and the rotation speed of the compressor 11 is in the rotation speed range [F1, F2], the first chamber temperature difference of the refrigeration chamber 101 and the second chamber temperature difference of the freezer chamber 102 are small, at this time, the first outlet 41 can be controlled to be in the fully open state and the second outlet 42 is in the closed state, and the flow of the valve body 4 is adjusted to a smaller state, so as to ensure that the refrigeration chamber 101 of the refrigerator quickly enters the rapid cooling mode, and the freezer chamber 102 quickly enters the rapid freezing mode.

[0117] It should be noted that the first temperature difference threshold ΔT1, the second temperature difference threshold ΔT2, the first rotation speed threshold F1 and the second rotation speed threshold F2 in the embodiment are not fixed values, and can be adjusted according to different products and use environments, which will not be described again.

[0118] The control method of the refrigerator in the embodiment of the application has a higher priority for judging the ambient temperature of the refrigerator than for judging the chamber temperature difference or the rotation speed condition of the compressor. The combination of the valve body 4 with the one-in-two-out and throttling function and the first throttling element 14 and the second throttling element 15 realizes four kinds of variable flow adjustment, aims to improve the stability of the refrigerator performance under different environmental conditions and modes, and the simple control logic and economical scheme of the valve body 4 also increase the competitiveness of the product itself.

[0119] According to the refrigeration system 10, the refrigerator and the control method of the refrigerator in the embodiments of the application, by arranging the valve body 4 with the inlet 40 and the first outlet 41 in the refrigeration cycle circuit 3, the working state of the first outlet 41 includes the fully open state, the throttling state and the closed state, the refrigeration mode of the refrigerator is determined according to the environmental information, the rotation speed of the compressor 11 is adjusted according to different refrigeration modes, and the combination of the one-in-one-out valve body 4 and the first throttling element 14 can be used to switch the first outlet 41 of the valve body 4 between different working states according to different environmental conditions, so as to select the flow suitable for the corresponding refrigeration mode, the control logic is simple and the cost is low, and the running stability and reliability of the refrigerator are improved.

[0120] In addition, when the system is just started, the first outlet 41 of the valve body 4 is alternately switched between the fully open state and the closed state, and the time for which the first outlet 41 operates in the fully open state is gradually reduced in an amount equal to the number of times the temperature of the return gas at the inlet 40 of the valve body 4 increases, thereby achieving rapid cooling. After the system is stably operated, the first outlet 41 of the valve body 4 is alternately switched between the fully open state and the closed state, and the time for which the first outlet 41 operates in the fully open state is gradually increased as the temperature of the return gas increases, which can prevent a large amount of liquid refrigerant accumulated in front of the inlet 40 of the valve body 4 from entering the evaporator 13 and not being completely evaporated, effectively reducing the risk of liquid strike of the compressor 11; at the same time, the proportion of the amount of liquid refrigerant entering the evaporator 13 increases, for example, the proportion of liquid refrigerant can reach 92% to 95%, thereby promoting the complete evaporation of the refrigerant in the evaporator 13, ensuring that the refrigeration compartment 101 and the freezer compartment 102 can be rapidly cooled at the same time, improving the cooling effect and reducing the power consumption when starting. When the refrigeration compartment 101 has no refrigeration demand and only the freezer compartment 102 has a refrigeration demand, the overall refrigeration demand decreases, at this time, the time for which the first outlet 41 operates in the fully open state is reduced, and the closed time of the first outlet 41 is increased, so that the proportion of liquid refrigerant entering the evaporator 13 through the first throttling element 14 is larger, for example, the proportion of liquid refrigerant can reach more than 95%, and the evaporation of liquid refrigerant in the evaporator 13 is more complete, which improves the refrigeration effect while reducing the energy consumption of the system.

[0121] In addition, the refrigeration cycle circuit 3 further comprises a valve body 4 having an inlet 40, a first outlet 41 and a second outlet 42, wherein the first outlet 41 has a fully open state, a throttling state and a closed state, the second outlet 42 has a fully open state and a closed state, and in the fully open state, the flow rate of the second outlet 42 is greater than that of the first outlet 41. Through the combination of the valve body 4 with one inlet and two outlets, the first throttling element 14 and the second throttling element 15, the priority of judging the ambient temperature of the refrigerator is higher than that of judging the temperature difference between the compartments, the speed of the compressor 11 is adjusted according to different refrigeration modes, four kinds of variable flow adjustment are realized, and the stability of the performance of the refrigerator under different environmental conditions and modes is improved, and at the same time, the simple control logic and economical scheme of the valve body 4 also increase the competitiveness of the product itself.

[0122] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within 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 wherein, The application relates to a refrigeration system. The refrigeration system comprises a refrigeration assembly, a refrigeration cycle circuit, a valve body, and a second throttling element. The refrigeration assembly comprises a compressor, a condenser, an evaporator and a first throttling element. The refrigeration cycle circuit is provided with the refrigeration assembly, the output end of the compressor is communicated with the input end of the condenser, the output end of the first throttling element is communicated with the input end of the evaporator, and the output end of the evaporator is communicated with the input end of the compressor.

2. The refrigeration system of claim 1, wherein, The valve body comprises an inlet and a first outlet, the inlet is communicated with the output end of the condenser, the first outlet is communicated with the input end of the first throttling element, and the working state of the first outlet comprises a fully-open state, a throttling state and a closed state.

3. The refrigeration system of claim 1 wherein, The valve body comprises a valve seat and a valve block arranged coaxially, the end face of the valve seat is provided with the inlet and the first outlet which are distributed in a circumferential direction, the first outlet comprises a through hole and an arc-shaped groove communicated with the through hole, the width of the arc-shaped groove is smaller than the diameter of the through hole, the valve block comprises a connecting part provided with a notch, the connecting part is attached to the end face of the valve seat and can rotate relative to the valve seat so that the notch can be communicated with or disconnected from the first outlet, when the notch is communicated with the through hole, the first outlet is in the fully-open state; when the notch is communicated with the arc-shaped groove, the first outlet is in the throttling state; when the connecting part covers the first outlet except the notch, the first outlet is in the closed state. The valve body further comprises a second outlet, the working state of the second outlet comprises a fully-open state and a closed state, and the flow rate of the second outlet in the fully-open state is greater than that of the first outlet in the fully-open state. The refrigeration assembly further comprises a second throttling element, the refrigeration cycle circuit comprises a main pipeline and a first refrigerant branch pipeline and a second refrigerant branch pipeline communicated with the main pipeline respectively, the first throttling element is arranged in the first refrigerant branch pipeline, the second throttling element is arranged in the second refrigerant branch pipeline, the first outlet is communicated with the input end of the first throttling element, the second outlet is communicated with the input end of the second throttling element, and the input end of the evaporator is communicated with the output end of the first throttling element and the output end of the second throttling element respectively.

4. The refrigeration system of claim 3 wherein, The valve body comprises a valve seat and a valve block arranged coaxially, an end surface of the valve seat is provided with the inlet, the first outlet and the second outlet distributed in a circumferential direction, the first outlet comprises a through hole and an arc-shaped slot in communication with the through hole, and a width of the arc-shaped slot is smaller than a diameter of the through hole, a cross-sectional area of the second outlet is larger than a cross-sectional area of the through hole, the valve block comprises a connecting part with a notch, the connecting part is attached to the end surface of the valve seat and can rotate relative to the valve seat so that the notch can selectively communicate with the first outlet or the second outlet, wherein when the notch communicates with the through hole of the first outlet, the first outlet is in a fully open state; when the notch communicates with the arc-shaped slot of the first outlet, the first outlet is in a throttling state; when the notch communicates with the second outlet, the second outlet is in a fully open state; when the connecting part covers the first outlet or the second outlet, the first outlet or the second outlet is in a closed state.

5. A refrigerator, wherein, It comprises: a cabinet, wherein a refrigeration compartment and a freezing compartment are arranged in the cabinet; and a refrigeration system according to any one of claims 1 to 4, wherein the refrigeration system is used for refrigerating the refrigeration compartment and the freezing compartment; a sensor assembly for detecting environmental information of the refrigerator; and a controller electrically connected with a refrigeration assembly, a valve body and the sensor assembly of the refrigeration system, wherein the controller is configured to determine a refrigeration mode of the refrigerator according to the environmental information and control the first outlet of the valve body to switch between different working states according to the refrigeration mode.

6. A control method of a refrigerator applied to the refrigerator of claim 5, wherein, The control method comprises: obtaining environmental information of the refrigerator; determining a refrigeration mode of the refrigerator according to the environmental information; controlling the valve body to work according to the refrigeration mode. 7.The control method of a refrigerator according to claim 6, wherein, The environmental information comprises a first compartment temperature of the refrigeration compartment and a second compartment temperature of the freezing compartment, and the determination of the refrigeration mode of the refrigerator according to the environmental information comprises: obtaining a first compartment temperature difference according to a difference between the first compartment temperature and a first temperature preset value and a second compartment temperature difference according to a difference between the second compartment temperature and a second temperature preset value; determining that the refrigeration mode of the refrigerator is a fast refrigeration mode according to that the first compartment temperature difference is greater than a first temperature difference threshold value and / or the second compartment temperature difference is greater than a second temperature difference threshold value; determining that the refrigeration mode of the refrigerator is an energy-saving mode according to that the first compartment temperature difference is less than or equal to the first temperature difference threshold value and the second compartment temperature difference is less than or equal to the second temperature difference threshold value. 8.The control method of a refrigerator according to claim 7, wherein, The control of the valve body according to the refrigeration mode comprises: controlling the first outlet to be in a fully open state in the fast refrigeration mode; controlling the compressor to increase from a current rotating speed to a first rotating speed according to that the first compartment temperature difference is greater than the first temperature difference threshold value and the second compartment temperature difference is greater than the second temperature difference threshold value; controlling the compressor to change from the current rotating speed to a second rotating speed according to that the first compartment temperature difference is less than or equal to the first temperature difference threshold value and the second compartment temperature difference is greater than the second temperature difference threshold value; According to the first chamber temperature difference being greater than a first temperature difference threshold and the second chamber temperature difference being less than or equal to a second temperature difference threshold, the compressor is controlled to change from a current rotating speed to a third rotating speed; In the energy-saving mode, the first outlet is controlled to be in a throttling state, and the compressor is controlled to change from a current rotating speed to a fourth rotating speed; The first rotating speed, the second rotating speed, the third rotating speed and the fourth rotating speed decrease in sequence. 9.The control method of a refrigerator according to claim 7, wherein, The control method further comprises: In the fast refrigeration mode, a first return gas temperature at the inlet of the valve body is obtained at a preset time interval; According to the first return gas temperature being less than or equal to a first return gas temperature threshold, the first outlet is controlled to be switched between a fully open state and a closed state alternately, wherein a cycle time of the first outlet being switched between the fully open state and the closed state alternately is a first preset time length t, a time of the first outlet being in the fully open state is a first time length t1, the first return gas temperature is less than or equal to the first return gas temperature threshold for i times, and the first time length t1=t-△t1×(i-1), △t1 is a time increment, i is a natural number, i≤t / △t1, △t1>0, t>t1>0. 10.The control method of a refrigerator according to claim 7, wherein, The control method further comprises: In the energy-saving mode, a second return gas temperature at the inlet of the valve body is obtained; According to the second return gas temperature being less than or equal to a second return gas temperature threshold, the first outlet is controlled to be switched between a fully open state and a closed state alternately, wherein a cycle time of the first outlet being switched between the fully open state and the closed state alternately is a second preset time length t', a time of the first outlet being in the fully open state is a second time length t2, and t2<t'; According to the second return gas temperature being greater than the second return gas temperature threshold, the first outlet is controlled to be switched between a fully open state and a closed state alternately, wherein a time of the first outlet being in the fully open state is a third time length t3, and t3>t2. 11.The control method of a refrigerator according to claim 10, wherein, The control method further comprises: According to the first chamber temperature being less than or equal to the first temperature preset value and the second chamber temperature being greater than the second temperature preset value, the first outlet is controlled to be switched between a fully open state and a closed state alternately, wherein a time of the first outlet being in the fully open state is a fourth time length t4, and t4<t2. 12.The control method of a refrigerator according to claim 7, wherein, The environmental information further comprises an environmental temperature of the refrigerator, and the determination of the refrigeration mode of the refrigerator according to the environmental information comprises: When the environmental temperature is greater than an environmental temperature preset value, it is determined that the refrigeration mode of the refrigerator is a fast refrigeration mode; When the environmental temperature is less than or equal to the environmental temperature preset value, according to the first chamber temperature difference being greater than a first temperature difference threshold and / or the second chamber temperature difference being greater than a second temperature difference threshold, it is determined that the refrigeration mode of the refrigerator is a fast refrigeration mode; When the environmental temperature is less than or equal to the environmental temperature preset value, according to the first chamber temperature difference being less than or equal to a first temperature difference threshold and the second chamber temperature difference being less than or equal to a second temperature difference threshold, it is determined that the refrigeration mode of the refrigerator is an energy-saving mode. 13.The control method of a refrigerator according to claim 12, wherein, The valve body further comprises a second outlet, a working state of the second outlet comprises a fully open state and a closed state, and a flow rate of the second outlet in the fully open state is greater than a flow rate of the first outlet in the fully open state, and the controlling the valve body to work according to the refrigeration mode comprises: in the fast refrigeration mode, according to the rotation speed of the compressor being greater than or equal to a first rotation speed threshold, at least one of the first outlet and the second outlet is controlled to be in the fully open state; in the energy-saving mode, according to the rotation speed of the compressor being less than the first rotation speed threshold, the first outlet is controlled to be in the throttling state and the second outlet is controlled to be in the closed state. 14.The control method of a refrigerator according to claim 13, wherein, in the fast refrigeration mode, according to the rotation speed of the compressor being greater than or equal to a first rotation speed threshold, at least one of the first outlet and the second outlet is controlled to be in the fully open state, comprising: when the environment temperature is greater than an environment temperature preset value, according to the rotation speed of the compressor being greater than a second rotation speed threshold, the first outlet and the second outlet are controlled to be in the fully open state, the second rotation speed threshold is greater than the first rotation speed threshold; according to the rotation speed of the compressor being less than or equal to the second rotation speed threshold and greater than or equal to the first rotation speed threshold, the first outlet is controlled to be in the closed state and the second outlet is controlled to be in the fully open state; when the environment temperature is less than or equal to the environment temperature preset value, according to the rotation speed of the compressor being less than or equal to the second rotation speed threshold and greater than or equal to the first rotation speed threshold, the first outlet is controlled to be in the fully open state and the second outlet is controlled to be in the closed state.

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