Refrigerator

Abstract

The embodiment of the utility model belongs to the technical field of household appliances, and provides a refrigerator which can realize countercurrent control of a refrigerant in a defrosting mode and short-circuit control of a dew removal pipe and an evaporation pipe through a control valve, that is, in the defrosting mode, the dew removal pipe and the evaporation pipe are not communicated, so that the phenomenon that the dew removal pipe cannot be communicated with the evaporation pipe in the defrosting mode can be avoided. Structures such as a box body and a door body are frosted at a low temperature, and water in the evaporating dish is frozen. And the driving electric quantity of the valve body of the refrigerating system is saved, and energy is saved.

Description

Technical Field

[0001] Embodiments of the present application relate to the technical field of household appliances. More specifically, it relates to a refrigerator. Background Art

[0002] In the pipeline design of the refrigeration system of a refrigerator, a dew removal pipe and an evaporation pipe are usually provided in the high-pressure section (the pipeline connected to the outlet of the condenser). Among them, the dew removal pipe section is usually arranged in the middle beam and the door frame part on the front of the box body, etc., to prevent condensation phenomena at positions such as the door body and the door seam due to low temperature. The evaporation pipe is usually arranged in the evaporation dish in the compressor compartment, and is used to evaporate the condensed water flowing down from the evaporator or the refrigerating chamber, so as to avoid water overflow and cause inconvenience to users.

[0003] For the frosting on the surface of the evaporator, defrosting can be achieved by the reverse flow of the refrigerant. Specifically, control the reverse flow of the refrigerant in each mechanism of the refrigeration system. The high-temperature and high-pressure gas flowing out of the compressor enters the evaporator, and the heat from the high-temperature and high-pressure gas is used to defrost the evaporator.

[0004] However, when the refrigerant in the refrigeration system undergoes reverse-flow defrosting, the pipe sections where the dew removal pipe and the evaporation pipe are located change from the high-pressure section to the low-pressure section due to the reverse flow of the refrigerant, which will cause adverse effects such as low-temperature frosting of the box body and the door body, and icing of the condensed water in the evaporation dish. Summary of the Utility Model

[0005] Embodiments of the present application provide a refrigerator, which can be used to solve the problem that when reverse-flow defrosting is carried out, the pipe sections where the dew removal pipe and the evaporation pipe are located change from the high-pressure section to the low-pressure section due to the reverse flow of the refrigerant, resulting in low-temperature frosting of structures such as the box body and the door body, and icing of the condensed water in the evaporation dish.

[0006] In a first aspect, embodiments of the present application provide a refrigerator, including:

[0007] A box body, which is configured with a storage compartment;

[0008] A door body, which is used to open or close the storage compartment;

[0009] A refrigeration system arranged in the box body, including: a compressor, a condenser, an evaporator, a control valve, a dew removal pipe, an evaporation pipe arranged in the compressor compartment, and an evaporation dish arranged in the compressor compartment; the dew removal pipe is arranged in the contact part between the box body and the door body, and the evaporation pipe is arranged in the evaporation dish;

[0010] Among them, the control valve is respectively connected to the exhaust port of the compressor, the intake port of the compressor, the inlet of the evaporation pipe, the outlet of the dew removal pipe, the inlet of the condenser, and the outlet of the evaporator. Among them, the outlet of the evaporation pipe is connected to the inlet of the dew removal pipe, and the outlet of the dew removal pipe is connected to the inlet of the condenser;

[0011] When the refrigeration system is in the refrigeration mode, the control valve makes the pipelines between the compressor, the evaporation pipe, the dew removal pipe, the condenser, and the evaporator conduct, so that the refrigerant flowing out of the compressor sequentially passes through the evaporation pipe, the dew removal pipe, the condenser, and the evaporator and then flows to the compressor;

[0012] When the refrigeration system is in the defrosting mode, the control valve makes the pipelines between the compressor, the evaporator, and the condenser conduct, so that the refrigerant flowing out of the compressor sequentially passes through the evaporator and the condenser and then flows to the compressor.

[0013] In this embodiment, a control valve can achieve the reverse flow control of the refrigerant in the defrosting mode and the short-circuit control of the dew removal pipe and the evaporation pipe. That is, in the defrosting mode, the dew removal pipe and the evaporation pipe are not connected, so that it is possible to avoid low-temperature frosting of structures such as the box body and the door body, and the water in the evaporation dish from freezing in the defrosting mode. And it saves the driving power of the valve body of the refrigeration system, achieving energy conservation.

[0014] In some embodiments of the present application, the control valve includes a first port, a second port, a third port, a fourth port, a fifth port, a sixth port, and a seventh port; the exhaust pipe of the compressor is connected to the first port; the second port is connected to the inlet of the evaporation pipe; the third port is connected to the outlet of the dew removal pipe through a connecting pipeline; the fourth port is connected to the connecting pipeline; the fifth port is connected to the inlet of the condenser, and the sixth port is connected to the intake port of the compressor; the seventh port is connected to the outlet of the evaporator;

[0015] When the refrigeration system is in the refrigeration mode, the first port is communicated with the second port, the fourth port and the fifth port are communicated, and the sixth port is communicated with the seventh port;

[0016] When the refrigeration system is in the defrosting mode, the first port is communicated with the third port, the fourth port is communicated with the seventh port, and the fifth port is communicated with the sixth port.

[0017] In this embodiment, the reverse flow control of the refrigerant in the refrigeration system and the control of the short circuit of the dew removal pipe and the evaporation pipe are achieved through a control valve with seven ports.

[0018] In some embodiments of the present application, a second branch and a first branch are arranged in parallel between the condenser and the evaporator; a first switching valve, a first drying filter and a first throttling device are sequentially arranged on the first branch, and a second switching valve, a second throttling device and a second drying filter are sequentially arranged on the second branch;

[0019] When the refrigeration system is in the refrigeration mode, the first switching valve is opened and the second switching valve is closed, so that the refrigerant flowing out of the condenser flows through the first switching valve, the first drying filter and the first throttling device in sequence and then flows to the evaporator;

[0020] When the refrigeration system is in the defrosting mode, the first switching valve is closed and the second switching valve is opened, so that the refrigerant flowing out of the evaporator flows through the second drying filter, the second throttling device and the second switching valve in sequence and then flows to the condenser.

[0021] In this embodiment, in the defrosting mode, the refrigerant flows to the condenser through the second branch, and in the refrigeration mode, the refrigerant flows to the evaporator through the first branch, so that the refrigerant can be throttled and depressurized by the throttling device in different modes to meet the requirements of defrosting and refrigeration.

[0022] In some embodiments of the present application, the first throttling device and the second throttling device are flow regulating valves.

[0023] In this embodiment, the flow regulating valve can be used as the throttling device to realize the control of throttling and depressurizing the refrigerant.

[0024] In some embodiments of the present application, the flow rate of the first throttling device is less than that of the second throttling device.

[0025] In this embodiment, by setting the flow rate of the first throttling device to be less than that of the second throttling device, the flow rate of the refrigerant in the refrigeration mode can be reduced, thereby saving energy consumption. Moreover, the flow rate of the refrigerant during defrosting is relatively large, which can improve the defrosting efficiency.

[0026] In some embodiments of the present application, the flow rate of the first throttling device is the same as that of the second throttling device.

[0027] In this embodiment, the flow rates of the first throttling device and the second throttling device can be the same, which can reduce the design complexity and manufacturing cost of the refrigeration system.

[0028] In some embodiments of the present application, the refrigerator further includes a controller, which is electrically connected to the first switching valve, the second switching valve, the refrigeration system and the control valve respectively;

[0029] The controller is configured to:

[0030] When it is detected that the evaporator has a defrosting requirement, the compressor is controlled to stop; and when the ambient temperature of the environment where the refrigerator is located is greater than a preset value, the first switching valve and the second switching valve are controlled to open; after the first switching valve and the second switching valve are opened for a preset duration, the compressor is controlled to start, and the first switching valve is controlled to close, and the first port of the control valve is controlled to communicate with the third port, the fourth port is controlled to communicate with the seventh port, and the fifth port is controlled to communicate with the sixth port, so that the refrigeration system enters the defrosting mode.

[0031] In the embodiment, when the ambient temperature is relatively high, before starting the defrosting mode, the compressor is controlled to stop, and the first branch and the second branch are controlled to flow for a period of time before starting the defrosting mode. During this period, due to the absence of the action of the compressor, the pressure difference between the high-pressure side (condenser side) and the low-pressure side (evaporator side) of the refrigerant will decrease. During this process, the refrigerant on the low-pressure side gradually vaporizes. This enables an increase in the amount of refrigerant participating in the defrosting cycle after starting the defrosting mode, thereby improving the defrosting efficiency.

[0032] In a second aspect, the present application provides a refrigerator, including:

[0033] A cabinet body configured with a storage compartment;

[0034] A door body for opening or closing the storage compartment;

[0035] A refrigeration system disposed in the cabinet body, including: a compressor, a condenser, an evaporator, a reversing valve, a dew removal pipe, an evaporation pipe disposed in a compressor compartment, and an evaporation dish disposed in the compressor compartment; the dew removal pipe is disposed in the contact portion between the cabinet body and the door body, and the evaporation pipe is disposed in the evaporation dish;

[0036] Wherein, the exhaust port of the compressor, the evaporation pipe, the dew removal pipe, and the reversing valve are connected in sequence;

[0037] When the refrigeration system is in the refrigeration mode, the reversing valve makes the passage between the compressor, the evaporation pipe, the dew removal pipe, and the condenser conductive, so that the refrigerant flowing out of the compressor sequentially passes through the evaporation pipe, the dew removal pipe, the condenser, and then flows back to the compressor;

[0038] When the refrigeration system is in the defrosting mode, the reversing valve makes the pipeline between the compressor, the evaporation pipe, the dew removal pipe, the evaporator, and the condenser conductive, so that the refrigerant flowing out of the compressor sequentially passes through the dew removal pipe, the evaporator, the evaporator, the condenser, and then flows back to the compressor.

[0039] In this embodiment, the dew removal pipe and the evaporation pipe are arranged between the exhaust port of the compressor and the control valve. In the defrosting mode, the dew removal pipe and the evaporation pipe are still in the high-pressure section, which can prevent the structures such as the box body and the door body from frosting at low temperatures and the condensed water in the evaporation dish from freezing.

[0040] Thirdly, the present application provides a refrigerator, including:

[0041] A box body, configured with a storage compartment;

[0042] A door body, used to open or close the storage compartment;

[0043] A refrigeration system arranged in the box body, including: a compressor, a condenser, an evaporator, a control valve, a dew removal pipe, an evaporation pipe arranged in the compressor compartment, and an evaporation dish arranged in the compressor compartment; the dew removal pipe is arranged in the contact part between the box body and the door body, and the evaporation pipe is arranged in the evaporation dish;

[0044] Wherein, the control valve is respectively connected to the exhaust port of the compressor, the intake port of the compressor, the inlet of the evaporation pipe, the outlet of the dew removal pipe, the outlet of the evaporator, the inlet of the condenser, and the outlet of the condenser. Among them, the outlet of the evaporation pipe is connected to the inlet of the dew removal pipe;

[0045] When the refrigeration system is in the refrigeration mode, the control valve makes the pipelines between the compressor and the condenser, the evaporation pipe, the dew removal pipe, and the evaporator conduct, so that the refrigerant flowing out of the compressor sequentially passes through the condenser, the evaporation pipe, the dew removal pipe, and the evaporator and then flows to the compressor;

[0046] When the refrigeration system is in the defrosting mode, the control valve makes the pipelines between the compressor and the evaporator and the condenser conduct, so that the refrigerant flowing out of the compressor sequentially passes through the evaporator and the condenser and then flows to the compressor.

[0047] In this embodiment, in the refrigeration mode, the refrigerant first passes through the condenser and then flows to the evaporation pipe and the dew removal pipe. At this time, the temperature of the dew removal pipe is relatively low, so the influence on the heat of the low-temperature compartment is small, making the heat load of this compartment small and the refrigeration operation more energy-efficient. And this control valve can realize the reverse flow control of the refrigerant in the defrosting mode and the short-circuit control of the dew removal pipe and the evaporation pipe. That is, in the defrosting mode, the dew removal pipe and the evaporation pipe are not connected, so that it is possible to prevent the structures such as the box body and the door body from frosting at low temperatures and the water in the evaporation dish from freezing in the defrosting mode.

[0048] In some embodiments of the present application, the control valve includes a first port, a second port, a third port, a fourth port, a fifth port, a sixth port, and a seventh port;

[0049] Among them, the exhaust pipe of the compressor is connected to the fourth port; the fifth port is connected to the inlet of the condenser; the first port is connected to the outlet of the condenser; the second port is connected to the inlet of the evaporation pipe; the third port is connected to the outlet of the dew removal pipe; the sixth port is connected to the intake port of the compressor; the seventh port is connected to the outlet of the evaporator;

[0050] When the refrigeration system is in the refrigeration mode, the first port is communicated with the second port, the fourth port and the fifth port are communicated, and the sixth port is communicated with the seventh port;

[0051] When the refrigeration system is in the defrosting mode, the first port is communicated with the third port, the fourth port is communicated with the seventh port, and the fifth port is communicated with the sixth port.

[0052] In this embodiment, the refrigerant reverse flow control of the refrigeration system and the control of the short circuit of the dew removal pipe and the evaporation pipe are realized through a control valve with seven ports. And in the refrigeration mode, the refrigerant first passes through the condenser and then flows to the evaporation pipe and the dew removal pipe. At this time, the temperature of the dew removal pipe is relatively low, so the influence on the heat of the low-temperature compartment is small, the heat load of this compartment is small, and the refrigeration operation is more energy-efficient. Description of the Drawings

[0053] In order to more clearly illustrate the embodiments of the present application or the implementation manners in the related art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the related art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings.

[0054] Figure 1 It is a schematic structural diagram of a refrigeration system in the related art of the example of the present application;

[0055] Figure 2 It is a schematic diagram of the refrigerant flow direction of a refrigeration system in the related art of the example of the present application in the defrosting mode;

[0056] Figure 3 It is a schematic diagram of a refrigerator provided by an embodiment of the present application;

[0057] Figure 4 It is a schematic structural diagram of a refrigeration system provided by an embodiment of the present application;

[0058] Figure 5 It is a schematic diagram of the installation of the dew removal pipe 42 on the refrigerator in the example of the present application;

[0059] Figure 6Schematic diagram of the installation of the evaporation tube 41 exemplified in this application on a refrigerator;

[0060] Figure 7 Schematic diagram of the evaporation tube 41 exemplified in the evaporating dish 14;

[0061] Figure 8 Schematic diagram of the flow direction of the refrigerant when the refrigeration system is in the refrigeration mode;

[0062] Figure 9 Schematic diagram of the flow direction of the refrigerant when the refrigeration system is in the defrosting mode;

[0063] Figure 10 Schematic diagram of the structure of a control valve provided by an embodiment of this application;

[0064] Figure 11 Schematic diagram of the structure of a refrigeration system provided by an embodiment of this application;

[0065] Figure 12 Schematic diagram of the flow direction of the refrigerant when the refrigeration system is in the refrigeration mode;

[0066] Figure 13 Schematic diagram of the flow direction of the refrigerant when the refrigeration system is in the defrosting mode;

[0067] Figure 14 Schematic diagram of the structure of another refrigeration system provided by this application;

[0068] Figure 15 Schematic diagram of the flow direction of the refrigerant when the refrigeration system is in the refrigeration mode;

[0069] Figure 16 Schematic diagram of the flow direction of the refrigerant when the refrigeration system is in the defrosting mode;

[0070] Figure 17 Schematic diagram of the structure of another refrigeration system provided by an embodiment of this application;

[0071] Figure 18 Schematic diagram of the flow direction of the refrigerant when the exemplified refrigeration system is in the refrigeration mode;

[0072] Figure 19 Schematic diagram of the flow direction of the refrigerant when the exemplified refrigeration system is in the defrosting mode;

[0073] Figure 20 Schematic diagram of the structure of another refrigeration system provided by an embodiment of this application;

[0074] Figure 21 Schematic diagram of the flow direction of the refrigerant when the exemplified refrigeration system is in the refrigeration mode;

[0075] Figure 22Schematic diagram of refrigerant flow when the refrigeration system for example is in the defrost mode.

[0076] Description of reference numerals:

[0077] 10 - Refrigerator; 11 - Freezer compartment;

[0078] 101 - Cabinet; 102 - Door body;

[0079] 103 - Refrigeration system; 104 - Controller;

[0080] 31 - Compressor; 32 - Condenser;

[0081] 33 - Evaporator; 34 - Control valve;

[0082] 35 - First switching valve; 36 - First throttling device;

[0083] 37 - Second switching valve; 38 - Second throttling device;

[0084] 39 - First drying filter; 40 - Second drying filter;

[0085] 41 - Evaporation tube; 42 - Dew removal tube;

[0086] 43 - Connecting pipeline; 341 - Rotating structure;

[0087] 342 - First channel; 343 - Second channel;

[0088] a1 - First port of control valve 34; a2 - Second port of control valve 34;

[0089] a3 - Third port of control valve 34; a4 - Fourth port of control valve 34;

[0090] a5 - Fifth port of control valve 34; a6 - Sixth port of control valve 34;

[0091] a7 - Seventh port of control valve 34; b1 - First port of reversing valve 44;

[0092] b2 - Second port of reversing valve 44; b3 - Third port of reversing valve 44;

[0093] b4 - Fourth port of reversing valve 44; 44 - Reversing valve;

[0094] c1 - Inlet of evaporation tube 41; d1 - Outlet of dew removal tube 42;

[0095] c2 - Outlet of evaporation tube 41; d2 - Inlet of dew removal tube 42;

[0096] e1 - Inlet of the condenser 32; e2 - Outlet of the condenser 32;

[0097] d2 - Inlet of the dew removal pipe 42; f1 - Outlet of the evaporator 33. Detailed implementation manners

[0098] To make the objectives, implementation manners and advantages of this application clearer, the following will clearly and completely describe the exemplary implementation manners of this application with reference to the accompanying drawings in the exemplary embodiments of this application. Obviously, the described exemplary embodiments are only a part rather than all of the embodiments of this application.

[0099] It should be noted that the brief descriptions of the terms in this application are only for facilitating the understanding of the subsequent described implementation manners, rather than intending to limit the implementation manners of this application. Unless otherwise specified, these terms should be understood in their ordinary and common meanings.

[0100] In addition, the terms "include" and "have" and any variations thereof are intended to cover but not exclusively include. For example, a product or device including a series of components does not necessarily have to be limited to those components clearly listed, but may include other components not clearly listed or inherent to these products or devices.

[0101] By providing some of the pipelines through which the refrigerant in the refrigeration system flows at positions such as the middle beam of the refrigerator and the door frame part on the front of the box body as dew removal pipes, the heat of the refrigerant can be used to heat the middle beam and the door frame part on the front of the box body, preventing condensation phenomena caused by low temperature at positions such as the door body and the door gap.

[0102] By providing another part of the pipelines through which the refrigerant in the refrigeration system flows in the evaporation dish in the compressor compartment as evaporation pipes, which are used to evaporate the water flowing down from the evaporator or the refrigerating chamber (including the condensed water flowing down from the refrigerating chamber and the defrost water flowing onto the evaporator), avoiding inconvenient use by the user due to water overflow.

[0103] Specifically, in the related art, as Figure 1 shown, the dew removal pipe and the evaporation pipe are arranged in the high - pressure condensation pipe section between the evaporator and the condenser (i.e., before the throttling device between the evaporator and the condenser). When the refrigeration system is in the refrigeration mode, the dew removal pipe and the evaporation pipe can utilize the condensation heat of the refrigerant cooled by the condenser flowing out from the condenser to achieve dew removal and evaporation of the condensed water.

[0104] However, when the refrigeration system is in the defrost mode, as Figure 2 shown, the pipe section where the dew removal pipe and the evaporation pipe are located changes from the high - pressure section to the low - pressure section due to the reverse flow of the refrigerant, absorbing heat and causing low - temperature frosting on structures such as the box body and the door body, and the water in the evaporation dish freezes.

[0105] Therefore, the present application provides a refrigerator, which realizes the control of refrigerant reverse flow and the short - circuit control of the dew - removing pipe and the evaporation pipe in the defrosting mode through a control valve, so that in the defrosting mode, the dew - removing pipe and the evaporation pipe are not connected, thereby avoiding low - temperature frosting of structures such as the cabinet body and the door body, and ice formation of the water in the evaporation dish. Moreover, it saves the driving power of the valve body of the refrigeration system and realizes energy conservation.

[0106] The technical solutions of the present application will be described in detail below in conjunction with specific embodiments. These specific embodiments can be combined with each other or exist independently. For the same or similar concepts or processes, they may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the drawings.

[0107] First, the specific structure of a refrigerator provided by the embodiments of the present application will be described. Exemplarily, Figure 3 is a schematic diagram of a refrigerator provided by an embodiment of the present application, as Figure 3 shown, the refrigerator 10 includes a cabinet body 101, a door body 102, and a storage compartment arranged inside the cabinet body 101.

[0108] In a possible implementation manner, as Figure 3 shown, the storage compartment includes a refrigerating chamber and a freezing chamber 11, etc., Figure 3 and the refrigerating chamber is not shown in

[0109] It can be understood that Figure 3 is only a schematic diagram of a refrigerator applicable to the present application, and it can also be a refrigerator with other structures. The present application does not limit this. Exemplarily, the refrigerator in the embodiments of the present application can be a single - system refrigerator (multiple compartments share one evaporator), a dual - system refrigerator (the freezing chamber and the refrigerating chamber use different evaporators respectively), or a triple - system refrigerator (the freezing chamber, the refrigerating chamber, and the variable - temperature chamber use different evaporators respectively). Generally Figure 3 the exemplary refrigerator is a dual - system refrigerator.

[0110] In a possible implementation manner, the refrigerator 10 further includes a refrigeration system 103 and a controller 104. The refrigeration system 103 and the controller 104 can be electrically connected.

[0111] Exemplarily, Figure 4 is a schematic structural diagram of a refrigeration system provided by an embodiment of the present application, as Figure 4 shown, the refrigeration system 103 includes a compressor 31, a condenser 32, an evaporator 33, and a control valve 34.

[0112] Among them, the compressor 31 is configured to provide power for the refrigeration of the refrigerator 10.

[0113] The condenser 32 is configured to condense and dissipate heat from the refrigerant from the compressor 31 to form a liquid refrigerant.

[0114] The evaporator 33 is configured to evaporate and absorb heat based on the refrigerant flowing out of the condenser 32 to provide cooling capacity for the storage compartment. It can be understood that if the refrigerator 10 is a dual-system refrigerator or a triple-system refrigerator, the evaporator 33 can be an evaporator for refrigerating the freezer compartment 11, and the refrigeration system 103 further includes an evaporator for refrigerating other compartments. The connection between this evaporator and the condenser 32 can be the same as the connection between the evaporator 33 and the condenser 32, which will not be elaborated here. Among them, a control valve 34 is provided between the compressor 31, the condenser 32 and the evaporator 33. The control valve 34 can control the flow direction of the refrigerant flowing out of the compressor 31. For example, in the refrigeration mode, it controls the flow direction of the refrigerant to be from the refrigerant flowing out of the compressor 31 to the condenser 32, and in the defrosting mode, it controls the flow direction of the refrigerant to be from the refrigerant flowing out of the compressor 31 to the evaporator 33.

[0115] In a possible implementation, as Figure 4 shown, the refrigeration system 103 further includes an evaporation tube 41 and a dew removal tube 42.

[0116] Exemplarily, Figure 5 is a schematic diagram of the installation of the dew removal tube 42 of this application example on the refrigerator. As Figure 5 shown, the dew removal tube 42 ( Figure 5 represented by a dashed line in the figure) can be arranged in the contact part between the cabinet 101 and the door body 102. Exemplarily, this contact part can include the front plate of the middle beam 11 of the door body 102 and the cabinet 101 and the front plate of the lower beam 12 of the cabinet 101. It can be understood that when the door body 102 ( Figure 5 not shown in the figure) is closed, the front plate of the lower beam 12 of the middle beam 11 can be in contact with the door body.

[0117] Exemplarily, Figure 6 is a schematic diagram of the installation of the evaporation tube 41 of this application example on the refrigerator. As Figure 6 shown, the refrigerator 10 further includes an evaporation dish 14. The evaporation tube 41 can be arranged on the evaporation dish 14 in the compressor compartment 13. The evaporation tube 41 can be arranged inside the evaporation dish 14 and can be in direct contact with the water on the evaporation dish 14 to facilitate the evaporation of the water on the evaporation dish 13. Figure 7 is a schematic diagram of the evaporation tube 41 in the evaporation dish 14 for example.

[0118] The control valve 34 is respectively connected to the exhaust port y1 of the compressor 31, the intake port y2 of the compressor 31, the inlet c1 of the evaporation pipe 41, the outlet d1 of the dew removal pipe 42, the inlet e1 of the condenser 32, and the outlet f1 of the evaporator 33. Among them, the outlet c2 of the evaporation pipe 41 is connected to the inlet d2 of the dew removal pipe 42, and the outlet d1 of the dew removal pipe 42 is connected to the inlet e1 of the condenser 32.

[0119] When the refrigeration system 103 is in the refrigeration mode, the control valve 34 makes the pipelines between the compressor 31 and the evaporation pipe 41, the dew removal pipe 42, the condenser 32, and the evaporator 33 communicate and conduct, so that the refrigerant flowing out of the compressor 31 sequentially passes through the evaporation pipe 41, the dew removal pipe 42, the condenser 32, and the evaporator 33 and then flows to the compressor 31.

[0120] When the refrigeration system 103 is in the defrosting mode, the control valve 34 makes the pipelines between the compressor 31 and the evaporator 33 and the condenser 32 communicate and conduct, so that the refrigerant flowing out of the compressor 31 sequentially passes through the evaporator 33 and the condenser 32 and then flows to the compressor 31.

[0121] In this embodiment, by using one control valve, the reverse flow control of the refrigerant in the defrosting mode and the short - circuit control of the dew removal pipe and the evaporation pipe can be realized. That is, in the defrosting mode, the dew removal pipe and the evaporation pipe are not connected, so that it is possible to avoid low - temperature frosting of structures such as the box body and the door body, and the freezing of the water in the evaporation dish during the defrosting mode. Moreover, the driving power of the valve body of the refrigeration system is saved, achieving energy conservation.

[0122] In a possible implementation manner, as Figure 4 shown, a second branch and a first branch are arranged in parallel between the outlet e2 of the condenser 32 and the evaporator 33. A first switching valve 35 and a first throttling device 36 are sequentially connected on the first branch, and a second switching valve 37 and a second throttling device 38 are sequentially connected on the second branch.

[0123] When the refrigeration system 103 is in the refrigeration mode, the first switching valve 35 is opened and the second switching valve 37 is closed, so that the refrigerant flowing out of the condenser 32 passes through the first switching valve 35 and the first throttling device 36 and then flows to the evaporator 33. Exemplarily, reference can be made to Figure 8 , Figure 8 which is a schematic diagram of the refrigerant flow direction when the refrigeration system is in the refrigeration mode.

[0124] When the refrigeration system 103 is in the defrosting mode, the first switching valve 35 is closed and the second switching valve 37 is opened, so that the refrigerant flowing out of the evaporator 33 passes through the second throttling device 38 and the second switching valve 37 and then flows to the condenser 32. Exemplarily, reference can be made to Figure 9 , Figure 9Schematic diagram of the refrigerant flow direction when the refrigeration system is in the defrost mode.

[0125] In a possible implementation, as Figure 4 shown, a first drying filter 39 is further provided in the first branch, and the first drying filter 39 is arranged in the pipeline between the first switching valve 35 and the first throttling device 36.

[0126] A second drying filter 40 is further provided in the second branch, and the second drying filter 40 is arranged in the pipeline between the second throttling device 38 and the evaporator 33.

[0127] By providing the first drying filter 39 in the pipeline between the first switching valve 35 and the first throttling device 36, the refrigerant flowing out of the condenser 32 can be dehumidified and filtered of impurities before entering the first throttling device 36, which can prevent the first throttling device 36 from being blocked and improve the refrigeration effect. By providing the second drying filter 40 in the pipeline between the second throttling device 38 and the evaporator 33, the refrigerant flowing out of the evaporator 33 can be dehumidified and filtered of impurities before entering the second throttling device 38, which can prevent the second throttling device 38 from being blocked and improve the reliability.

[0128] With such a setting, the refrigerant flows through the second branch to the condenser in the defrost mode, and the refrigerant flows through the first branch to the evaporator in the refrigeration mode, so that the refrigerant can be throttled and depressurized by the throttling device in different modes to meet the defrosting and refrigeration requirements.

[0129] In a possible implementation, the first throttling device 36 and the second throttling device 38 can be capillary tubes, which can achieve throttling and depressurization of the refrigerant.

[0130] In a possible implementation, the first throttling device 36 and the second throttling device 38 can be flow regulating valves, and the flow of the refrigerant can be adjusted by adjusting the flow of the flow regulating valves to achieve throttling and depressurization of the refrigerant.

[0131] In a possible implementation, the flow rate of the first throttling device 36 can be less than the flow rate of the second throttling device 38. By setting the flow rate of the first throttling device 36 to be less than the flow rate of the second throttling device 38, the flow rate of the refrigerant in the refrigeration mode of the refrigeration system 103 can be reduced, thereby achieving energy consumption savings. Moreover, the refrigerant flow rate in the defrost mode of the refrigeration system is relatively large, which can improve the defrost efficiency.

[0132] In a possible implementation, the flow rate of the first throttling device 36 can be the same as the flow rate of the second throttling device 38. With such a setting, the design complexity and manufacturing cost of the refrigeration system 103 can be reduced.

[0133] In a possible implementation,Figure 10 The following is a schematic structural diagram of a control valve 34 provided by an embodiment of the present application, as Figure 10 shown, the control valve 34 includes a first port a1, a second port a2, a third port a3, a fourth port a4, a fifth port a5, a sixth port a6 and a seventh port a7.

[0134] Among them, when the first port a1 and the second port a2 are opened, the first port a1 can communicate with the second port a2. When the first port a1 and the third port a3 are opened, the first port a1 can communicate with the third port a3.

[0135] In a possible implementation manner, the control valve 34 includes a rotatable rotating structure 341, and a first channel 342 and a second channel 343 are arranged in the rotating member. When the rotating structure 341 is in the first state, the fourth port a4 communicates with the fifth port a5 through the first channel 342, and the sixth port 6 and the seventh port 7 communicate through the second channel 343. When the rotating structure 341 is in the second state, the fourth port 4 communicates with the seventh port 7 through the first channel 342, and the fifth port 5 communicates with the sixth port 6 through the second channel 343.

[0136] Exemplarily, when the rotating structure 341 is in the first state, the rotating structure 341 is rotated to the second state through the rotating structure 341. The rotation center of the rotating structure 341 can be the center of the rotating structure 341.

[0137] Figure 11 The following is a schematic structural diagram of a refrigeration system provided by an embodiment of the present application, as Figure 11 shown, the exhaust port y1 of the compressor 31 is connected to the first port a1. The second port a2 of the control valve 34 is connected to the inlet c1 of the evaporation pipe 41. The third port a3 is connected to the outlet d1 of the dew removal pipe 42 through a connecting pipe 43. The fourth port a4 is connected to the connecting pipe 43. The fifth port a5 is connected to the inlet e1 of the condenser 32, the sixth port a6 is connected to the intake port y2 of the compressor 31. The seventh port a7 is connected to the outlet f1 of the evaporator 33.

[0138] When the refrigeration system 103 is in the refrigeration mode, the first port a1 of the control valve 34 communicates with the second port a2 of the control valve 34, the fourth port a4 of the control valve 34 and the fifth port a5 of the control valve 34 communicate, and the sixth port a6 of the control valve 34 communicates with the seventh port a7 of the control valve 34. Specifically, the fourth port a4 communicates with the fifth port a5 through the first channel 342, and the sixth port 6 and the seventh port 7 communicate through the second channel 343.

[0139] Exemplarily, Figure 12 The following is a schematic diagram of the refrigerant flow direction when the refrigeration system is in the refrigeration mode, asFigure 12 As shown, the refrigerant at low temperature and low pressure is sucked into the compressor 31 and compressed into a refrigerant at high temperature and high pressure in the cylinder of the compressor 31. The refrigerant at high temperature and high pressure enters through the first port a1 and the second port a2 of the control valve 34, successively passes through the evaporation tube 41 and the dew removal tube 42, then enters the fourth port a4 of the control valve 34, and flows through the first channel 342 to the condenser 32. The refrigerant gas at high temperature and high pressure dissipates heat through the condenser 32, and its temperature continuously drops and is gradually cooled into a liquid. Then it enters the first branch, passes through the first switching valve 35, enters the first drying filter 39, and then enters the first throttling device 36 to be throttled and depressurized into a wet vapor at normal temperature and low pressure. Subsequently, it starts to absorb heat and vaporize in the evaporator 33, not only reducing the temperature of the evaporator 33 and its surroundings, but also turning the refrigerant into a gas at low temperature and low pressure, entering the seventh port a7 of the control valve 34, flowing through the second channel 343 to the sixth port a6, and returning to the compressor 31 to complete the refrigeration cycle of the refrigerator. Among them, the refrigerant at high temperature and high pressure passing through the evaporation tube 41 and the dew removal tube 42 can prevent the structures such as the box body and the door body from frosting at low temperature, and prevent the water in the evaporation dish from freezing.

[0140] When the refrigeration system 103 is in the defrosting mode, the first port a1 is communicated with the third port a3, the fourth port a4 is communicated with the seventh port a7, and the fifth port a5 is communicated with the sixth port a6. Specifically, the fourth port a4 and the seventh port a7 are communicated through the first channel, and the fifth port a5 and the sixth port a6 are communicated through the second channel.

[0141] Exemplarily, Figure 13 As shown in the schematic diagram of the refrigerant flow direction when the refrigeration system is in the defrosting mode, Figure 13 As shown, the refrigerant at low temperature and low pressure is sucked into the compressor 31 and compressed into a refrigerant at high temperature and high pressure in the cylinder of the compressor 31, and then enters the fourth port a4 through the first port a1 and the third port a3 of the control valve 34, flows out from the seventh port a7 after passing through the first channel 342, and thus flows to the evaporator 33 to defrost the evaporator 33. Then it enters the second branch, passes through the second drying filter 40 and the second throttling device 38, and then enters the condenser 32. Then the refrigerant flowing out from the condenser 32 enters the fifth port a5 of the control valve 34, flows out from the sixth port a6 after passing through the second channel 343, and returns to the compressor 31. Among them, the refrigerant at high temperature and high pressure can melt the frost condensed on the evaporator 33 by heat conduction in the evaporator 33 to achieve the purpose of defrosting. It can be understood that in the defrosting mode, the refrigerant does not pass through the evaporation tube 41 and the dew removal tube 42, which will not cause the temperature of the structures such as the box body and the door body and the evaporation dish to decrease, and can avoid frosting of the structures such as the box body and the door body and freezing of the water in the evaporation dish.

[0142] In a possible implementation, the refrigerator 10 further includes a controller 104, which is electrically connected to the first switching valve 35, the second switching valve 37, the compressor 31, and the control valve 34 respectively.

[0143] The controller 104 is configured to:

[0144] When it is detected that the evaporator 33 has a defrosting requirement, the compressor 31 is controlled to stop. And when the ambient temperature of the environment where the refrigerator is located is greater than a preset value, the first switching valve 35 and the second switching valve 37 are controlled to open. So that the first branch and the second branch are connected.

[0145] After the first switching valve and the second switching valve are opened for a preset duration, the compressor 31 is controlled to start, the first switching valve 35 is controlled to close, and the first port a1 of the control valve 34 is controlled to communicate with the third port a3, the fourth port a4 is communicated with the seventh port a7, and the fifth port a5 is communicated with the sixth port a6, so that the refrigeration system 103 enters the defrosting mode.

[0146] Exemplarily, the ambient temperature can be detected by an ambient temperature sensor arranged outside the cabinet 101, and the controller 104 can obtain the ambient temperature through this temperature sensor.

[0147] Wherein, the preset duration can be any duration greater than 0 and less than or equal to 10 minutes.

[0148] Since the ambient temperature is relatively high at this time, after the compressor 31 stops and within the preset duration after the first switching valve 35 and the second switching valve 37 are opened, the pressure difference between the high-pressure side (condenser side) and the low-pressure side (evaporator side) of the refrigerant will decrease. This process is understood as a pressure balance process. During the pressure balance process, the refrigerant on the low-pressure side gradually vaporizes. So that after the defrosting mode is turned on, the amount of refrigerant participating in the defrosting cycle is increased, thereby improving the defrosting efficiency. Moreover, after the refrigerant pressure in the refrigeration system 103 is balanced, the energy consumption for switching the control valve 34, the first switching valve 35, and the second switching valve 37 is relatively low, which is beneficial to improving the service life of the control valve 34, the first switching valve 35, and the second switching valve 37.

[0149] In a possible implementation, when the ambient temperature is less than the preset value, the first switching valve 35 can be directly controlled to close, the second switching valve 37 is opened, and the first port a1 of the control valve 34 is controlled to communicate with the third port a3, the fourth port a4 is communicated with the seventh port a7, and the fifth port a5 is communicated with the sixth port a6, so that the refrigeration system 103 enters the defrosting mode. That is, the pressure balance of the refrigeration system 103 is not carried out, which can reduce the risk of liquid slugging of the compressor 31 caused by the decrease in the refrigerant temperature at the intake port of the compressor 31 in the case of a relatively low ambient temperature.

[0150] In a possible implementation, Figure 14 is a schematic structural diagram of another refrigeration system provided by this application. As Figure 14 shown, the refrigeration system 103 includes a compressor 31, a condenser 32, an evaporator 33, a reversing valve 44, a dew removal pipe 42, an evaporation pipe 41, and a compressor 31 disposed in the compressor compartment. The installation positions of the dew removal pipe 42 and the evaporation pipe 41 in the box body 101 can refer to the above embodiments and will not be elaborated here.

[0151] Among them, the exhaust port y1 of the compressor 31, the evaporation pipe 41, the dew removal pipe 42, and the reversing valve 44 are connected in sequence.

[0152] When the refrigeration system 103 is in the refrigeration mode, the reversing valve 44 makes the passages between the compressor 31, the evaporation pipe 41, the dew removal pipe 42, and the condenser 32 conductive, so that the refrigerant flowing out of the compressor 31 passes through the evaporation pipe 41, the dew removal pipe 42, the condenser 32 in sequence and then flows back to the compressor 31.

[0153] When the refrigeration system 103 is in the defrosting mode, the reversing valve 44 makes the pipelines between the compressor 31, the evaporation pipe 41, the dew removal pipe 42, the evaporator 33, and the condenser 32 conductive. The refrigerant flowing out of the compressor 31 passes through the evaporation pipe 41, the dew removal pipe 42, the evaporator 33, the condenser 32 in sequence and then flows back to the compressor 31.

[0154] In a possible implementation, as Figure 14 shown, the reversing valve 44 includes a first port b1, a second port b2, a third port b3, and a fourth port b4. Among them, the outlet d1 of the dew removal pipe 42 is connected to the first port b1 of the reversing valve 44, the second port b2 of the reversing valve 44 is connected to the inlet e1 of the condenser 32, the third port b3 of the reversing valve 44 is connected to the intake port y2 of the compressor 31, and the fourth port b4 of the reversing valve 44 is connected to the outlet f1 of the evaporator 33.

[0155] In a possible implementation, a first branch and a second branch can be provided between the outlet e2 of the condenser 32 and the evaporator 33, which can refer to the above embodiments and will not be elaborated here.

[0156] Exemplarily, Figure 15 is a schematic diagram of the refrigerant flow direction when the refrigeration system is in the refrigeration mode. As Figure 15As shown in the figure, the refrigerant at low temperature and low pressure is sucked into the compressor 31 and compressed into a refrigerant at high temperature and high pressure in the cylinder of the compressor 31. After passing through the evaporation tube 41 and the dew removal tube 42 in sequence, the refrigerant at high temperature and high pressure flows to the condenser 32 through the second port b2 of the reversing valve 44. The refrigerant gas at high temperature and high pressure dissipates heat through the condenser 32, and its temperature continuously drops and is gradually cooled into a liquid. Then it enters the first branch, passes through the first switching valve 35, enters the first drying filter 39, and then enters the first throttling device 36 to be throttled and depressurized into a wet vapor at normal temperature and low pressure. Subsequently, it starts to absorb heat and vaporize in the evaporator 33, not only reducing the temperature of the evaporator 33 and its surroundings, but also turning the refrigerant into a gas at low temperature and low pressure. After entering the fourth port b4 and the third port b3 of the reversing valve 44, it returns to the compressor 31 to complete the refrigeration cycle of the refrigerator. Among them, the refrigerant at high temperature and high pressure passing through the evaporation tube 41 and the dew removal tube 42 can prevent low-temperature frosting on structures such as the box body and the door body, as well as prevent the water in the evaporation dish from freezing.

[0157] Exemplarily, Figure 16 FIG. is a schematic diagram of the refrigerant flow direction when the refrigeration system is in the defrosting mode, as Figure 16 shown, the refrigerant at low temperature and low pressure is sucked into the compressor 31 and compressed into a refrigerant at high temperature and high pressure in the cylinder of the compressor 31. After passing through the evaporation tube 41 and the dew removal tube 42 in sequence, it flows to the evaporator 33 through the first port b1 and the fourth port b4 of the reversing valve 44 to defrost the evaporator 33. Then it enters the second branch, passes through the second drying filter 40 and the second throttling device 38, and then enters the condenser 32. Then the refrigerant flowing out of the condenser 32 enters the second port b2 and the third port b3 of the reversing valve 44 and returns to the compressor 31. Among them, the refrigerant at high temperature and high pressure in the evaporator 33 can melt the frost condensed on the evaporator 33 by heat conduction to achieve the purpose of defrosting. Among them, the refrigerant at high temperature and high pressure passing through the evaporation tube 41 and the dew removal tube 42 can prevent low-temperature frosting on structures such as the box body and the door body, as well as prevent the water in the evaporation dish from freezing.

[0158] In this embodiment, the dew removal tube and the evaporation tube are arranged between the exhaust port of the compressor and the control valve. In the defrosting mode, the dew removal tube and the evaporation tube are still in the high-pressure section, which can avoid low-temperature frosting on structures such as the box body and the door body, and prevent the condensed water in the evaporation dish from freezing.

[0159] In one possible implementation, Figure 17 FIG. is a schematic structural diagram of another refrigeration system provided by an embodiment of the present application, as Figure 17 shown, the refrigeration system 103 includes a condenser 32, an evaporator 33, a reversing valve 44, a dew removal tube 42, an evaporation tube 41, and an evaporation dish 14 arranged in the compressor compartment. The arrangement positions of the dew removal tube 42 and the evaporation tube 41 in the box body 101 can refer to the above embodiment and will not be elaborated here.

[0160] Among them, the control valve 34 is respectively connected to the exhaust port y1 of the compressor 31, the intake port y2 of the compressor 31, the inlet c1 of the evaporation pipe 41, the outlet d1 of the dew removal pipe 42, the outlet of the evaporator 33, the inlet e1 of the condenser 32, and the outlet e2 of the condenser 32. Among them, the outlet c2 of the evaporation pipe 41 is connected to the inlet d2 of the dew removal pipe 42.

[0161] In a possible implementation manner, a first branch and a second branch are provided between the outlet d1 of the dew removal pipe 42 and the evaporator 33. Reference can be made to the above embodiments, and details are not described here again.

[0162] When the refrigeration system 103 is in the refrigeration mode, the control valve 34 makes the pipelines between the compressor 31, the condenser 32, the evaporation pipe 41, the dew removal pipe 42, and the evaporator 33 conduct, so that the refrigerant flowing out of the compressor 31 sequentially passes through the condenser 32, the evaporation pipe 41, the dew removal pipe 42, and the evaporator 33 and then flows to the compressor 31.

[0163] In a possible implementation manner, in the refrigeration mode, the first switching valve 35 is opened and the second switching valve 37 is closed, so that the refrigerant flowing out of the dew removal pipe 42 can flow to the evaporator 33 through the first branch. Exemplarily, reference can be made to Figure 18 , Figure 18 Figure showing the flow direction of the refrigerant when the exemplary refrigeration system is in the refrigeration mode.

[0164] When the refrigeration system 103 is in the defrosting mode, the control valve 34 makes the pipelines between the compressor 31, the evaporator 33, and the condenser 32 conduct, so that the refrigerant flowing out of the compressor 31 passes through the evaporator 33 and the condenser 32 and then flows to the compressor 31.

[0165] In a possible implementation manner, in the defrosting mode, the first switching valve 35 is closed and the second switching valve is opened and closed, so that the refrigerant flowing out of the evaporator 33 can flow to the condenser 32 through the second branch. Exemplarily, reference can be made to Figure 19 , Figure 19 Figure showing the flow direction of the refrigerant when the exemplary refrigeration system is in the defrosting mode.

[0166] In this embodiment, in the refrigeration mode, the refrigerant first passes through the condenser and then flows to the evaporation pipe and the dew removal pipe. At this time, the temperature of the dew removal pipe is relatively low, so the influence on the heat of the low-temperature compartment is small, the heat load of this compartment is small, and the refrigeration operation is more energy-efficient. And this control valve can realize the reverse flow control of the refrigerant in the defrosting mode and the short-circuit control of the dew removal pipe and the evaporation pipe. That is, in the defrosting mode, the dew removal pipe and the evaporation pipe are not connected, so as to avoid low-temperature frosting of structures such as the box body and the door body, and ice formation of the water in the evaporation dish in the defrosting mode.

[0167] In a possible implementation, Figure 20 FIG. 4 is a schematic structural diagram of another refrigeration system provided by an embodiment of the present application. As Figure 20 shown, the exhaust pipe y1 of the compressor 31 is connected to the fourth port a4. The fifth port a5 is connected to the inlet e1 of the condenser 32. The first port a1 is connected to the outlet e2 of the condenser 32. The second port a2 is connected to the inlet c1 of the evaporation pipe 41. The third port a3 is connected to the outlet d1 of the dew removal pipe 42. The sixth port a6 is connected to the intake port y2 of the compressor 31. The seventh port a7 is connected to the outlet f1 of the evaporator 33.

[0168] When the refrigeration system 103 is in the refrigeration mode, the first port a1 is communicated with the second port a2, the fourth port a4 and the fifth port a5 are communicated, and the sixth port a6 is communicated with the seventh port a7. Specifically, the fourth port a4 and the fifth port a5 are communicated through the first channel 342, and the sixth port 6 and the seventh port 7 are communicated through the second channel 343.

[0169] Exemplarily, Figure 21 FIG. 5 is a schematic diagram of the refrigerant flow when the exemplary refrigeration system is in the refrigeration mode. As Figure 21 shown, the low-temperature and low-pressure refrigerant is sucked into the compressor 31 and compressed into a high-temperature and high-pressure refrigerant in the cylinder of the compressor 31. The high-temperature and high-pressure refrigerant passes through the fourth port a4 of the control valve 34 and flows through the first channel 342 to the fifth port a5, and then enters the condenser 32. The high-temperature and high-pressure refrigerant gas dissipates heat through the condenser 32, and the temperature continuously drops and is gradually cooled into a liquid. After the refrigerant flowing out of the condenser 32 enters the first port a1 and the second port a2 of the control valve 34, it sequentially passes through the evaporation pipe 41 and the dew removal pipe 42, then enters the first branch, passes through the first switching valve 35 and enters the first drying filter 39, and then enters the first throttling device 36 to be throttled and depressurized into a normal-temperature and low-pressure wet vapor. Subsequently, it starts to absorb heat and vaporize in the evaporator 33, not only reducing the temperature of the evaporator 33 and its surroundings, but also turning the refrigerant into a low-temperature and low-pressure gas, entering the seventh port a7 of the control valve 34, flowing through the second channel 343 to the sixth port a6, and returning to the compressor 31 to complete the refrigeration cycle of the refrigerator. Among them, the refrigerant passing through the evaporation pipe 41 and the dew removal pipe 42 can prevent the structures such as the box body and the door body from frosting at low temperatures, and prevent the water in the evaporation dish from freezing. Moreover, since the refrigerant flows out of the condenser 32, the temperature of the dew removal pipe is relatively low at this time, so the influence on the heat of the low-temperature compartment is small, the heat load of this compartment is small, and the refrigeration operation is more energy-efficient.

[0170] When the refrigeration system 103 is in the defrost mode, the first port a1 is communicated with the third port a3, the fourth port a4 is communicated with the seventh port a7, and the fifth port a5 is communicated with the sixth port a6. Specifically, the fourth port a4 and the seventh port a7 are communicated through the first channel 342, and the fifth port a5 and the sixth port a6 are communicated through the second channel 343.

[0171] Exemplarily, Figure 22 Schematic diagram of the refrigerant flow when the exemplary refrigeration system is in the defrost mode, as Figure 22 shown, the low-temperature and low-pressure refrigerant is sucked into the compressor 31, and is compressed into a high-temperature and high-pressure refrigerant in the cylinder of the compressor 31. The high-temperature and high-pressure refrigerant passes through the fourth port a4 of the control valve 34, and flows through the first channel 342 to the seventh port a7, and thus flows to the evaporator 33 to defrost the evaporator 33. Then it enters the second branch, passes through the second drying filter 40 and the second throttling device 38, and then enters the third port a3 and the first port a1 of the control valve 34, and thus flows to the condenser 32. The refrigerant flowing out of the condenser 32 passes through the fifth port a5 of the control valve 34, and flows through the second channel 343 to the sixth port a6, and returns to the compressor 31. Among them, the high-temperature and high-pressure refrigerant can melt the frost condensed on the evaporator 33 by means of heat conduction in the evaporator 33 to achieve the purpose of defrosting. It can be understood that in the defrost mode, the refrigerant does not pass through the evaporation tube 41 and the dew removal tube 42, which will not cause the temperature of the box body, the door body and other structures and the evaporating dish to decrease, and avoid frosting of the box body, the door body and other structures and freezing of the water in the evaporating dish.

[0172] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

[0173] For the sake of convenience of explanation, the above description has been made in combination with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. According to the above teachings, various modifications and variations can be obtained. The selection and description of the above embodiments are for the purpose of better explaining the principles and practical applications, so that those skilled in the art can better use the embodiments and various different variations of the embodiments suitable for specific use considerations.

[0174] In this application, "a plurality of" means two or more. The descriptions such as "first" and "second" that appear in the embodiments of this application are only for illustration and to distinguish the described objects, without any order, nor do they represent special limitations on the number of devices in the embodiments of this application, and cannot constitute any limitation to the embodiments of this application. For example, the first threshold and the second threshold are only used to distinguish different thresholds, rather than indicating differences in the magnitude, priority, or importance of these two thresholds, etc.

[0175] In this application, terms such as "exemplary", "in some embodiments", and "in other embodiments" are used to provide examples, illustrations, or explanations. Any embodiment or design solution described as "exemplary" in this application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Rather, the use of the term "exemplary" is intended to present concepts in a specific manner.

[0176] In this application, the words "of", "corresponding", "corresponding", and "associated" can sometimes be used interchangeably. It should be noted that when not emphasizing their differences, the meanings they convey are the same.

Claims

1. A refrigerator, characterized in that: include: A box body is constructed with a storage room; A door body, used for opening or closing the storage chamber; The refrigeration system arranged in the box body comprises: a compressor arranged in the compressor compartment, a condenser, an evaporator, a control valve, a dew removal pipe, an evaporation pipe and an evaporation dish arranged in the compressor compartment; the dew removal pipe is arranged in the contact part between the box body and the door body, and the evaporation pipe is arranged in the evaporation dish; The control valve is respectively connected to the exhaust port of the compressor, the air inlet of the compressor, the inlet of the evaporation pipe, the outlet of the dew removal pipe, the inlet of the condenser and the outlet of the evaporator, wherein the outlet of the evaporation pipe is connected to the inlet of the dew removal pipe, and the outlet of the dew removal pipe is connected to the inlet of the condenser; When the refrigeration system is in a refrigeration mode, the control valve enables the pipelines between the compressor and the evaporation pipe, the dew removal pipe, the condenser and the evaporator to be connected, so that the refrigerant flowing out of the compressor passes through the evaporation pipe, the dew removal pipe, the condenser and the evaporator in sequence and then flows to the compressor; When the refrigeration system is in the defrost mode, the control valve allows the pipelines between the compressor and the evaporator and the condenser to be connected, so that the refrigerant flowing out of the compressor passes through the evaporator and the condenser in sequence and then flows to the compressor.

2. The refrigerator according to claim 1, characterized in that: The control valve includes a first port, a second port, a third port, a fourth port, a fifth port, a sixth port and a seventh port; The exhaust pipe of the compressor is connected to the first port; the second port is connected to the inlet of the evaporation pipe; the third port is connected to the outlet of the dew removal pipe through a connecting pipe; the fourth port is connected to the connecting pipe; the fifth port is connected to the inlet of the condenser, the sixth port is connected to the air inlet of the compressor; the seventh port is connected to the outlet of the evaporator; When the refrigeration system is in a refrigeration mode, the first port is in communication with the second port, the fourth port is in communication with the fifth port, and the sixth port is in communication with the seventh port; When the refrigeration system is in a defrost mode, the first port is communicated with the third port, the fourth port is communicated with the seventh port, and the fifth port is communicated with the sixth port.

3. The refrigerator according to claim 2, characterized in that: A second branch and a first branch connected in parallel are provided between the condenser and the evaporator; a first switch valve, a first drying filter and a first throttling device connected in sequence are provided on the first branch, and a second switch valve, a second throttling device and a second drying filter connected in sequence are provided on the second branch; When the refrigeration system is in a refrigeration mode, the first switch valve is opened and the second switch valve is closed, so that the refrigerant flowing out of the condenser passes through the first switch valve, the first drying filter and the first throttling device in sequence and then flows to the evaporator; When the refrigeration system is in defrosting mode, the first switch valve is closed and the second switch valve is opened, so that the refrigerant flowing out of the evaporator passes through the second drying filter, the second throttling device and the second switch valve in sequence and then flows to the condenser.

4. The refrigerator according to claim 3, characterized in that: The first throttling device and the second throttling device are flow regulating valves.

5. The refrigerator according to claim 4, characterized in that: The flow rate of the first throttling device is smaller than the flow rate of the second throttling device.

6. The refrigerator according to claim 4, characterized in that: The flow rate of the first throttling device is the same as the flow rate of the second throttling device.

7. The refrigerator according to claim 6, characterized in that: The refrigerator further includes a controller electrically connected to the first switch valve, the second switch valve, the refrigeration system and the control valve respectively; The controller is configured to: When it is detected that the evaporator has a defrost demand, the compressor is controlled to stop; and when the ambient temperature of the refrigerator is greater than a preset value, the first switch valve and the second switch valve are controlled to open; after the first switch valve and the second switch valve are opened for a preset time, the compressor is controlled to start, the first switch valve is controlled to close, and the first port of the control valve is controlled to be connected to the third port, the fourth port is connected to the seventh port, and the fifth port is connected to the sixth port, so that the refrigeration system enters the defrost mode.

8. A refrigerator, characterized in that: include: A box body is constructed with a storage room; A door body, used for opening or closing the storage chamber; The refrigeration system arranged in the box body comprises: a compressor arranged in the compressor compartment, a condenser, an evaporator, a reversing valve, a dew removal pipe, an evaporation pipe and an evaporation dish arranged in the compressor compartment; the dew removal pipe is arranged in the contact part between the box body and the door body, and the evaporation pipe is arranged in the evaporation dish; Wherein, the exhaust port of the compressor, the evaporation pipe, the dew removal pipe and the reversing valve are connected in sequence; When the refrigeration system is in a refrigeration mode, the reversing valve enables the passages between the compressor and the evaporator tube, the dew-removing tube, and the condenser to be connected, so that the refrigerant flowing out of the compressor passes through the evaporator tube, the dew-removing tube, and the condenser in sequence and then flows to the compressor; When the refrigeration system is in the defrost mode, the reversing valve allows the pipelines between the compressor and the evaporator tube, the dew-removing tube, the evaporator and the condenser to be connected, so that the refrigerant flowing out of the compressor passes through the dew-removing tube, the evaporator and the condenser in sequence and then flows to the compressor.

9. A refrigerator, characterized in that: include: A box body is constructed with a storage room; A door body, used for opening or closing the storage chamber; The refrigeration system arranged in the box body comprises: a compressor arranged in the compressor compartment, a condenser, an evaporator, a control valve, a dew removal pipe, an evaporation pipe and an evaporation dish arranged in the compressor compartment; the dew removal pipe is arranged in the contact part between the box body and the door body, and the evaporation pipe is arranged in the evaporation dish; The control valve is respectively connected to the exhaust port of the compressor, the air inlet of the compressor, the inlet of the evaporation pipe, the outlet of the dew removal pipe, the outlet of the evaporator, the inlet of the condenser and the outlet of the condenser, wherein the outlet of the evaporation pipe is connected to the inlet of the dew removal pipe; When the refrigeration system is in a refrigeration mode, the control valve enables the pipelines between the compressor and the condenser, the evaporation tube, the dew removal tube and the evaporator to be connected, so that the refrigerant flowing out of the compressor passes through the condenser, the evaporation tube, the dew removal tube and the evaporator in sequence and then flows to the compressor; When the refrigeration system is in the defrost mode, the control valve allows the pipelines between the compressor and the evaporator and the condenser to be connected, so that the refrigerant flowing out of the compressor passes through the evaporator and the condenser in sequence and then flows to the compressor.

10. The refrigerator according to claim 9, characterized in that: The control valve includes a first port, a second port, a third port, a fourth port, a fifth port, a sixth port and a seventh port; The exhaust pipe of the compressor is connected to the fourth port; the fifth port is connected to the inlet of the condenser; the first port is connected to the outlet of the condenser; the second port is connected to the inlet of the evaporation pipe; the third port is connected to the outlet of the dew removal pipe; the sixth port is connected to the air inlet of the compressor; and the seventh port is connected to the outlet of the evaporator. When the refrigeration system is in a refrigeration mode, the first port is in communication with the second port, the fourth port is in communication with the fifth port, and the sixth port is in communication with the seventh port; When the refrigeration system is in a defrost mode, the first port is communicated with the third port, the fourth port is communicated with the seventh port, and the fifth port is communicated with the sixth port.

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