Refrigerating system, refrigerator and control method thereof

Abstract

The invention relates to a refrigerating system, a refrigerator and a control method thereof, the refrigerating system comprises a wire tube condenser, the wire tube condenser comprises a main body wire tube, the main body wire tube is wound to form a containing space, a first port of the main body wire tube is connected with an exhaust port of a compressor, and a second port of the main body wire tube is connected with a refrigerant inlet of a throttling device through a first pipeline; the auxiliary wire tube is arranged in the accommodating space in a shuttling manner, and a third port of the auxiliary wire tube is connected with a second port of the main body wire tube; the refrigerating system further comprises a second air return pipe, the starting end of the second air return pipe is connected with a refrigerant outlet of the evaporator through a first pipeline, and the tail end of the second air return pipe is connected with a fourth port of the auxiliary wire pipe. And a first control valve is connected between the first pipeline and the second pipeline, so that after the first control valve is controlled to be opened, at least part of the refrigerant flowing out of the evaporator is allowed to flow to the auxiliary wire pipe through the second air return pipe, air blown out of the condensation fan is blown to the compressor after passing through the auxiliary wire pipe, and therefore the compressor bin is cooled.

Description

Technical Field

[0001] The present application relates to the technical field of refrigeration equipment, and in particular to a refrigeration system, a refrigerator and a control method thereof. Background Art

[0002] With the popularity of built-in refrigerators, rear condenser heat dissipation is also widely used in built-in refrigerators. Most of the rear condensers currently developed are microchannel condensers, spiral fin condensers, and refrigeration systems.

[0003] In the related art, due to the influence of the service life and the use environment of the refrigerator, the microchannel condenser, the spiral fin condenser and the wire tube condenser will accumulate too much dust, resulting in a decrease in the heat dissipation efficiency of the condenser. Summary of the invention

[0004] The present application provides a refrigeration system, a refrigerator and a control method thereof to solve the existing technical problems.

[0005] In a first aspect, the present application provides a refrigeration system, the refrigeration system comprising a compressor, a throttling device, an evaporator, and a first return air pipe arranged in sequence, the refrigeration system comprising a wire tube condenser, and the wire tube condenser comprising:

[0006] A main body wire tube is wound to form an accommodating space, a first port of the main body wire tube is connected to the exhaust port of the compressor, and a second port of the main body wire tube is connected to the refrigerant inlet of the throttling device through a first pipeline;

[0007] An auxiliary wire tube, the auxiliary wire tube is shuttled in the accommodating space of the main wire tube, and the third port of the auxiliary wire tube is connected to the second port of the main wire tube;

[0008] The refrigeration system further comprises a second air return pipe, the starting end of the second air return pipe is connected to the refrigerant outlet of the evaporator through a second pipeline, and the end of the second air return pipe is connected to the fourth port of the auxiliary wire pipe;

[0009] A first control valve is connected between the first pipeline and the second pipeline to allow at least part of the refrigerant flowing out of the evaporator to flow to the auxiliary wire tube through the second return air pipe after the first control valve is controlled to open.

[0010] In a possible implementation, the second air return pipe is not attached to the throttling device.

[0011] In one possible implementation, the wire tube condenser includes a second control valve, the third port of the auxiliary wire tube is connected to the second port of the main wire tube through a third pipeline, and the second control valve is arranged between the third pipeline and the first pipeline to allow the refrigerant flowing out of the main wire tube to flow to the auxiliary wire tube through the third pipeline after the second control valve is opened in a controlled manner.

[0012] In one possible implementation, the wire tube condenser includes a third control valve, the third port of the auxiliary wire tube is connected to the air inlet of the compressor through a fourth pipeline, and the third control valve is arranged between the third pipeline and the fourth pipeline to allow the refrigerant flowing out of the auxiliary wire tube to flow back to the compressor through the fourth pipeline after the third control valve is opened in a controlled manner.

[0013] In a possible implementation, the starting end of the first return air pipe is connected to the third port of the auxiliary wire tube through a fifth pipeline, and a fourth control valve is arranged between the fourth pipeline and the fifth pipeline to allow the refrigerant flowing out of the fourth port of the auxiliary wire tube to flow to the first return air pipe through the fifth pipeline after the fourth control valve is opened in a controlled manner, wherein the first return air pipe is attached to the throttling device.

[0014] In a possible implementation, the end of the second return air pipe is connected to the fourth port of the auxiliary wire tube through a sixth pipeline, the fourth port of the auxiliary wire tube is connected to the refrigerant inlet of the throttling device through a seventh pipeline, and a fifth control valve is arranged between the sixth pipeline and the seventh pipeline.

[0015] In a possible implementation, the main wire tube is provided with a first heat dissipation wire; and / or,

[0016] The auxiliary wire tube is provided with a second heat dissipation wire.

[0017] In a possible implementation, a water receiving tray is provided below the wire tube condenser.

[0018] In a second aspect, the present application provides a refrigerator comprising the refrigeration system as described above.

[0019] In a third aspect, the present application provides a refrigerator control method, which is applied to the refrigerator as described above, and the control method includes:

[0020] Acquire a first ambient temperature of a refrigerator and a heat dissipation temperature of a compressor of the refrigerator;

[0021] The refrigerant is controlled to flow from the evaporator to the auxiliary wire tube through the second return air pipe according to the first ambient temperature and the heat dissipation temperature.

[0022] In a possible implementation, controlling the refrigerant to flow from the evaporator through the second air return pipe to the auxiliary wire pipe according to the first ambient temperature and the heat dissipation temperature includes:

[0023] If the first ambient temperature is greater than a first preset temperature, and the heat dissipation temperature is greater than a second preset temperature, the refrigerant is controlled to flow from the evaporator to the auxiliary wire tube through the second return air pipe.

[0024] In a possible implementation, the controlling the refrigerant to flow from the evaporator through the second return air pipe to the auxiliary wire pipe includes:

[0025] detecting the terminal temperature of the second air return pipe;

[0026] If the terminal temperature is lower than a third preset temperature, the refrigerant flowing out of the auxiliary wire tube is controlled to flow toward the compressor through the first return air pipe, wherein the first return air pipe is attached to a throttling device.

[0027] In a possible implementation, it includes:

[0028] If the terminal temperature is greater than or equal to a third preset temperature, the refrigerant flowing out of the auxiliary wire tube is controlled to flow directly to the compressor.

[0029] In a possible implementation, a water receiving tray is provided below the wire tube condenser of the refrigerator, and the control method includes:

[0030] If the first ambient temperature is greater than the first preset temperature, the heat dissipation temperature is greater than the second preset temperature, and the water level in the water tray is greater than the preset water level, the refrigerant is controlled to flow from the main wire tube through the auxiliary wire tube to the throttling device, and then flow back to the compressor after passing through the evaporator and the first return air pipe.

[0031] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0032] The refrigeration system, refrigerator and control method thereof provided by the embodiment of the present application, when there is too much dust on the surface of the condenser causing the heat dissipation efficiency of the condenser to decrease, the heat in the compressor compartment accumulates and the temperature rises. If the heat dissipation temperature of the compressor is greater than the preset temperature, the first control valve can be controlled to open so that at least part of the refrigerant flowing out of the evaporator flows to the auxiliary wire tube through the second return air pipe. The temperature of the refrigerant flowing out of the evaporator is relatively low. At this time, since the second return air pipe is not attached to the throttling device, no heat exchange will occur with the throttling device, and the end temperature of the second return air pipe is relatively low. Then, the temperature of the refrigerant passing through the auxiliary wire tube is relatively low. Since the auxiliary wire tube is shuttled in the accommodating space of the main wire tube, the wind blown by the condensing fan passes through the auxiliary wire tube and then blows toward the compressor, which can reduce the blowing temperature of the condensing fan, thereby cooling the compressor compartment, avoiding deformation of the condensing fan bracket in a high temperature environment, and improving the service life of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0034] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0035] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0036] Figure 1 A schematic diagram of the structure of a refrigeration system provided in an embodiment of the present application;

[0037] Figure 2 for Figure 1 A perspective view of a wire tube condenser of a refrigeration system is shown;

[0038] Figure 3 for Figure 2 A top view of a wire tube condenser shown in FIG.

[0039] Figure 4 The working principle of the refrigeration system provided for this application is shown in FIG. Figure 1 , where the arrow direction is the refrigerant flow direction;

[0040] Figure 5 The working principle of the refrigeration system provided for this application is shown in FIG. Figure 2, where the arrow direction is the refrigerant flow direction;

[0041] Figure 6 The working principle of the refrigeration system provided for this application is shown in FIG. Figure 3 , where the arrow direction is the refrigerant flow direction;

[0042] Figure 7 The working principle of the refrigeration system provided for this application is shown in FIG. Figure 4 , where the arrow direction is the refrigerant flow direction;

[0043] Figure 8 A flowchart of a refrigerator control method provided in an embodiment of the present application.

[0044] Description of reference numerals:

[0045] 100. Refrigeration system;

[0046] 1. compressor; 2. wire tube condenser; 21. main wire tube; 211. accommodating space; 212. first port; 213. second port; 22. auxiliary wire tube; 221. third port; 222. fourth port; 23. first heat sink; 24. second heat sink; 3. throttling device; 4. evaporator; 5. first air return pipe; 6. second air return pipe;

[0047] V1, first control valve; V2, second control valve; V3, third control valve; V4, fourth control valve; V5, fifth control valve;

[0048] G1, first pipeline; G2, second pipeline; G3, third pipeline; G4, fourth pipeline; G5, fifth pipeline; G6, sixth pipeline; G7, seventh pipeline. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0050] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0051] For ease of description, spatial relative terms may be used herein to describe the relative positional relationship or movement of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", "front", "back", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure undergoes a position flip or a posture change or a motion state change, then these directional indications also change accordingly, for example: an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative descriptors used herein are interpreted accordingly.

[0052] In the related art, due to the influence of the service life and use environment of the refrigerator, the microchannel condenser, the spiral fin condenser and the wire tube condenser will have too much dust accumulation. Excessive dust accumulation will affect the heat exchange efficiency between the condenser and the air, resulting in a decrease in the heat dissipation efficiency and the condenser surface temperature being too high. Since the wind from the condensing fan blows from the condenser to the compressor, heat accumulates in the compressor compartment, which may cause the condensing fan bracket to deform in a high temperature environment. In addition, the compressor needs to increase the speed in a high temperature environment. Continuous operation of the compressor at a high speed will also reduce the service life of the compressor.

[0053] In order to solve the technical problem that the heat dissipation efficiency of the condenser of the existing refrigerator is reduced due to excessive dust accumulation, the present application provides a refrigeration system, a refrigerator and a control method thereof, which can control at least part of the refrigerant flowing out of the evaporator to flow to the auxiliary wire tube through the second return air pipe, and the wind blown by the condensing fan passes through the auxiliary wire tube and then blows toward the compressor, which can reduce the blowing temperature of the condensing fan, thereby cooling the compressor compartment, avoiding deformation of the condensing fan bracket in a high temperature environment, and increasing the service life of the compressor.

[0054] like Figure 1 As shown, a refrigeration system 100 is provided for an embodiment of the present application. The refrigeration system 100 is applied to a refrigerator. Optionally, the refrigerator may be an embedded refrigerator with slow heat dissipation. The solution of this embodiment may also be applicable to other types of refrigerators. In addition to refrigerators, it may also be applied to other devices including a compressor 1.

[0055] The refrigeration system 100 may generally include a compressor 1, a throttling device 3, an evaporator 4, and a first air return pipe 5 which are arranged in sequence. The throttling device 3 may specifically be a capillary tube, or may be other suitable throttling devices 3.

[0056] like Figures 1 to 3 As shown, the refrigeration system 100 includes a wire tube condenser 2, which includes a main wire tube 21 and an auxiliary wire tube 22. The main wire tube 21 is wound to form an accommodating space 211. The first port 212 of the main wire tube 21 is connected to the exhaust port of the compressor 1, and the second port 213 of the main wire tube 21 is connected to the refrigerant inlet of the throttling device 3 through the first pipeline G1. The refrigerant discharged from the exhaust port of the compressor 1 flows into the main wire tube 21, the throttling device 3, the evaporator 4 and the first return air pipe 5 in sequence, and finally flows back to the air inlet of the compressor 1, which can form a first refrigerant circuit.

[0057] The auxiliary wire tube 22 is disposed in the accommodating space 211 of the main wire tube 21 , and the third port 221 of the auxiliary wire tube 22 is connected to the second port 213 of the main wire tube 21 .

[0058] The refrigeration system 100 also includes a second return air pipe 6, the starting end of the second return air pipe 6 is connected to the refrigerant outlet of the evaporator 4 through the second pipeline G2, and the end of the second return air pipe 6 is connected to the fourth port 222 of the auxiliary wire tube 22; the refrigerant discharged from the exhaust port of the compressor 1 flows into the main wire tube 21, the throttling device 3, the evaporator 4, the second return air pipe 6 and the auxiliary wire tube 22 in sequence, and finally flows back to the air inlet of the compressor 1, which can form a second refrigerant circuit.

[0059] A first control valve V1 is connected between the first pipeline G1 and the second pipeline G2 to allow at least part of the refrigerant flowing out of the evaporator 4 to flow to the auxiliary wire tube 22 through the second return air pipe 6 after the first control valve V1 is controlled to open.

[0060] Generally, the refrigeration system 100 further includes a condensing fan, which is disposed on one side of the wire-tube condenser 2 , and the wind blown by the condensing fan is blown from the condenser to the compressor 1 .

[0061] In this embodiment, the flow direction of the refrigerant can be controlled by switching the valve on the refrigerant pipeline. Figure 4As shown, the refrigerant flows out from the exhaust port of the compressor 1, passes through the main wire tube 21, the throttling device 3, the evaporator 4 and the first return air pipe 5 in sequence, and then flows back to the air inlet of the compressor 1. The compressor 1, the main wire tube 21, the throttling device 3, the evaporator 4 and the first return air pipe 5 constitute a first refrigerant circuit. When too much dust accumulates on the surface of the condenser, causing the heat dissipation efficiency of the condenser to decrease, heat accumulates in the compressor 1 compartment and the temperature rises. If the heat dissipation temperature of the compressor 1 is greater than the preset temperature, the first control valve V1 can be controlled to open so that at least part of the refrigerant flowing out of the evaporator 4 flows to the auxiliary wire tube 22 through the second return air pipe 6. The temperature of the refrigerant flowing out of the evaporator 4 is relatively low. At this time, since the second return air pipe 6 is not attached to the throttling device 3, no heat exchange will occur with the throttling device 3, and the end temperature of the second return air pipe 6 is relatively low. Then, the temperature of the refrigerant passing through the auxiliary wire tube 22 is relatively low. Since the auxiliary wire tube 22 is shuttled in the accommodating space 211 of the main wire tube 21, the wind blown by the condensing fan passes through the auxiliary wire tube 22 and then blows toward the compressor 1, which can reduce the blowing temperature of the condensing fan, thereby cooling the compressor 1 compartment, avoiding deformation of the condensing fan bracket in a high temperature environment, and improving the service life of the compressor 1.

[0062] It should be noted that at least part of the refrigerant flowing out of the evaporator 4 flows to the auxiliary wire tube 22 through the second return air pipe 6. It can be that part of the refrigerant flowing out of the evaporator 4 flows to the auxiliary wire tube 22 through the second return air pipe 6, and the other part of the refrigerant flowing out of the evaporator 4 flows back to the compressor 1 through the first return air pipe 5; or it can be that all the refrigerant flowing out of the evaporator 4 flows to the auxiliary wire tube 22 through the second return air pipe 6.

[0063] Among them, the second air return pipe 6 is not attached to the throttling device 3. The second air return pipe 6 is not attached to the capillary tube, which can avoid the throttling device 3 from exchanging heat with the refrigerant in the second air return pipe 6, so that the refrigerant in the second air return pipe 6 can be maintained at a relatively low temperature, and the terminal temperature of the second air return pipe 6 can be as low as about -25°C, so that the low-temperature refrigerant flows in the auxiliary wire tube 22, and the condensing fan blows low-temperature wind to the compressor 1, thereby reducing the temperature of the compressor 1 compartment.

[0064] Optionally, the compressor 1 compartment is deployed on the bottom plate of the refrigerator, and the second return air duct 6 is attached to the air inlet side of the bottom plate of the refrigerator. The ambient air enters from the air inlet side, passes through the surface of the second return air duct 6 to cool down, thereby reducing the temperature of the ambient air, thereby taking away the heat in the compressor 1 compartment and achieving a cooling effect.

[0065] Optionally, the first return air pipe 5 is arranged on the air inlet side of the bottom of the compressor 1 compartment, and the first control valve V1 can also control the refrigerant to flow from the first return air pipe 5 to the compressor 1. By controlling the refrigerant to flow from the evaporator 4 into the first return air pipe 5 arranged on the air inlet side of the compressor 1 compartment, and then return from the first return air pipe 5 to the compressor 1, the residual cooling of the evaporator 4 can be used to cool the ambient air entering the compressor 1 compartment, thereby improving the heat dissipation effect of the compressor 1 compartment, effectively reducing the temperature of the compressor 1 compartment, improving the refrigeration efficiency of the compressor 1, and reducing the safety hazards caused by the high temperature of the refrigerator.

[0066] In some embodiments, the wire tube condenser 2 includes a second control valve V2, and the third port 221 of the auxiliary wire tube 22 is connected to the second port 213 of the main wire tube 21 through the third pipeline G3. The second control valve V2 is arranged between the third pipeline G3 and the first pipeline G1 to allow the refrigerant flowing out of the main wire tube 21 to flow to the auxiliary wire tube 22 through the third pipeline G3 after the second control valve V2 is opened in a controlled manner. In some cases, for example, due to the low temperature of the refrigerant passing through the auxiliary wire tube 22, condensation may occur. The condenser is located above the water receiving tray, which may cause the water receiving tray to overflow. When it is detected that the water receiving tray is about to overflow, if the heat dissipation efficiency of the main wire tube 21 is low and cannot meet the refrigeration needs of the refrigerator, the second switching valve is controlled to allow the refrigerant flowing out of the main wire tube 21 to flow to the auxiliary wire tube 22 through the third pipeline G3. At this time, on the one hand, the main wire tube 21 is connected to the auxiliary wire tube 22, which can increase the heat exchange area of ​​the wire tube condenser 2 and effectively improve the heat dissipation efficiency; on the other hand, the refrigerant flowing in the auxiliary wire tube 22 comes from the main wire tube 21, which can avoid the refrigerant temperature passing through the auxiliary wire tube 22 being too low and continuing to produce condensed water.

[0067] In some cases, since the terminal temperature of the second air return pipe 6 is relatively low, for example, the terminal temperature of the second air return pipe 6 is lower than -25°C, the low-temperature refrigerant in the auxiliary wire tube 22 is likely to cause condensed water.

[0068] In some embodiments, the wire tube condenser 2 includes a third control valve V3, and the third port 221 of the auxiliary wire tube 22 is connected to the air inlet of the compressor 1 through the fourth pipeline G4. The third control valve V3 is arranged between the third pipeline G3 and the fourth pipeline G4, so that after the third control valve V3 is controlled to open, the refrigerant flowing out of the auxiliary wire tube 22 is allowed to flow back to the compressor 1 through the fourth pipeline G4. In some cases, such as when there is too much dust on the surface of the condenser, resulting in a decrease in the heat dissipation efficiency of the condenser, the heat in the compressor 1 accumulates and the temperature rises. If the heat dissipation temperature of the compressor 1 is greater than the preset temperature, the first control valve V1 can be controlled to open so that the refrigerant flowing out of the evaporator 4 flows to the auxiliary wire tube 22 through the second return air pipe 6; and the third control valve V3 can be controlled to open so that the refrigerant flowing out of the auxiliary wire tube 22 flows back to the compressor 1 through the fourth pipeline G4. The flow direction of the refrigerant in the refrigeration system 100 is as follows. Figure 5 At this time, since the second air return pipe 6 is not attached to the throttling device 3, no heat exchange will occur with the throttling device 3, and the terminal temperature of the second air return pipe 6 is relatively low, so the temperature of the refrigerant passing through the auxiliary wire tube 22 is relatively low, and the wind blown by the condensing fan passes through the auxiliary wire tube 22 and blows toward the compressor 1, which can reduce the blowing temperature of the condensing fan, thereby cooling the compressor 1, avoiding deformation of the condensing fan bracket in a high temperature environment, and prolonging the service life of the compressor 1.

[0069] In some cases, due to the low temperature of the end of the second return air pipe 6, the low-temperature refrigerant of the auxiliary wire tube 22 flows directly back to the compressor 1 from the fourth pipeline G4, which is easy to cause liquid hammer. Therefore, in some embodiments, the beginning of the first return air pipe 5 is connected to the third port 221 of the auxiliary wire tube 22 through the fifth pipeline G5, and a fourth control valve V4 is provided between the fourth pipeline G4 and the fifth pipeline G5, so that after the fourth control valve V4 is controlled to open, the refrigerant flowing out of the fourth port 222 of the auxiliary wire tube 22 is allowed to flow to the first return air pipe 5 through the fifth pipeline G5, wherein the first return air pipe 5 is attached to the throttling device 3.

[0070] After the first control valve V1 is controlled to open so that at least part of the refrigerant flowing out of the evaporator 4 flows to the auxiliary wire tube 22 through the second return air pipe 6, if the terminal temperature of the second return air pipe 6 is lower than the third preset temperature, the refrigerant flowing out of the auxiliary wire tube 22 is controlled to flow from the fifth pipeline G5 to the first return air pipe 5, and finally flows back to the compressor 1. Since the first return air pipe 5 is attached to the throttling device 3, the low-temperature refrigerant in the first return air pipe 5 exchanges heat with the throttling device 3 and then flows back to the compressor 1, thereby avoiding the liquid hammer phenomenon caused by the refrigerant with too low a temperature flowing into the compressor 1. At this time, the flow direction of the refrigerant is as follows: Figure 6 For example, if the terminal temperature of the second return air pipe 6 is lower than 30° C., the refrigerant must pass through the first return air pipe 5 and then go to the compressor 1 .

[0071] In some embodiments, the end of the second return air pipe 6 is connected to the fourth port 222 of the auxiliary wire tube 22 through the sixth pipeline G6, the fourth port 222 of the auxiliary wire tube 22 is connected to the refrigerant inlet of the throttling device 3 through the seventh pipeline G7, and a fifth control valve V5 is arranged between the sixth pipeline G6 and the seventh pipeline G7.

[0072] In some cases, for example, when the heat dissipation temperature of the compressor 1 is lower than the preset temperature, the refrigerant flowing out of the main wire tube 21 is controlled by the second switching valve to flow to the auxiliary wire tube 22 through the third pipeline G3, and the refrigerant in the auxiliary wire tube 22 is controlled by the fifth control valve V5 to flow from the seventh pipeline G7 to the throttling device 3. Alternatively, when it is detected that the water receiving pan is about to overflow, the refrigerant flowing out of the main wire tube 21 is controlled by the second switching valve to flow to the auxiliary wire tube 22 through the third pipeline G3, and the refrigerant in the auxiliary wire tube 22 is controlled by the fifth control valve V5 to flow from the seventh pipeline G7 to the throttling device 3, such as Figure 7 As shown, on the one hand, the main wire tube 21 is connected to the auxiliary wire tube 22, which can increase the heat exchange area of ​​the wire tube condenser 2 and effectively improve the heat dissipation efficiency; on the other hand, the refrigerant flowing in the auxiliary wire tube 22 comes from the main wire tube 21, which can avoid the refrigerant temperature passing through the auxiliary wire tube 22 being too low and continuing to produce condensed water.

[0073] In some embodiments, a first heat sink 23 is provided on the main wire tube 21. A plurality of first heat sinks 23 are provided, and the plurality of first heat sinks 23 are arranged at intervals and can be welded to the main wire tube 21 to increase the heat dissipation area of ​​the main wire tube 21 and improve the heat dissipation efficiency of the condenser. Of course, a second heat sink 24 may also be provided on the auxiliary wire tube 22. A plurality of second heat sinks 24 are provided, and the plurality of second heat sinks 24 are arranged at intervals and can be welded to the auxiliary wire tube 22 to increase the heat dissipation area of ​​the auxiliary wire tube 22 and improve the heat dissipation efficiency of the condenser.

[0074] In some embodiments, a water receiving pan is provided below the wire tube condenser 2. In some cases, if the refrigeration of the evaporator 4 flows into the auxiliary wire tube 22 from the second return air pipe 6, condensation is likely to occur due to the low temperature at the end of the second return air pipe 6, and the water receiving pan can be used to receive this part of condensed water.

[0075] Optionally, a water level sensor is provided on the water receiving tray, and the water level sensor is used to detect the water level of the water receiving tray.

[0076] The embodiment of the present application further provides a refrigerator, comprising the refrigeration system 100 as described above.

[0077] like Figure 8 As shown, the embodiment of the present application also provides a refrigerator control method, which is applied to the refrigerator as mentioned above in Sohu, and the control method includes the following steps:

[0078] S1, obtaining a first ambient temperature of the refrigerator and a heat dissipation temperature of a compressor 1 of the refrigerator;

[0079] S2. Control the refrigerant to flow from the evaporator 4 to the auxiliary wire tube 22 through the second return air pipe 6 according to the first ambient temperature and the heat dissipation temperature.

[0080] At least part of the refrigerant flowing out of the evaporator 4 flows to the auxiliary wire tube 22 through the second return air pipe 6. The temperature of the refrigerant flowing out of the evaporator 4 is relatively low. At this time, since the second return air pipe 6 is not attached to the throttling device 3, no heat exchange will occur with the throttling device 3. The terminal temperature of the second return air pipe 6 is relatively low, so the temperature of the refrigerant passing through the auxiliary wire tube 22 is relatively low. Since the auxiliary wire tube 22 is shuttled in the accommodating space 211 of the main wire tube 21, the wind blown by the condensing fan passes through the auxiliary wire tube 22 and then blows toward the compressor 1, which can reduce the blowing temperature of the condensing fan, thereby cooling the compressor 1, avoiding deformation of the condensing fan bracket in a high temperature environment, and improving the service life of the compressor 1.

[0081] In addition to the first ambient temperature and the heat dissipation temperature, this embodiment can also select the compressor 1 speed as a trigger condition. For example, when the compressor 1 speed is ≥3600r / min and the first ambient temperature and the heat dissipation temperature are consistent, the refrigerant is controlled to flow from the evaporator 4 into the first return air pipe 5.

[0082] Optionally, the first preset temperature is 36°C, and it can also be adaptively adjusted according to the geographical location of the refrigerator and the heat dissipation conditions of the installation site. When the heat dissipation temperature selects the top temperature of the compressor 1, the second preset temperature is 95°C, and when the heat dissipation temperature selects the condensing fan temperature, the second preset temperature is 85°C. If the condensing fan bracket material in the market is PPTV, it can not deform at 90°C; if it is ABS material, the maximum is 80°C. Therefore, the condensing fan temperature can be set according to the condensing fan bracket material. If the condensing fan bracket material is PPTV, then the second preset temperature can be set to 85°C; if the condensing fan bracket material is PPTV, then the second preset temperature can be set to 75°C.

[0083] When the ambient temperature outside the refrigerator is greater than 36°C, the heat load of the refrigerator increases significantly. To ensure that the compartment temperature meets the requirements, the compressor 1 runs at a higher speed. When the user sets special functions on the refrigerator display panel, such as quick freezing, deep freezing, etc., the speed of the compressor 1 will exceed 3600r / min. At this time, the temperature sensor on the top of the compressor 1 and the temperature sensor on the condensing fan start to record the temperature and collect the heat dissipation temperature. It is updated every 60 seconds. The temperature is connected to the storage device of the refrigerator.

[0084] In one example, controlling the refrigerant to flow from the evaporator 4 through the second return air pipe 6 to the auxiliary wire pipe 22 according to the first ambient temperature and the heat dissipation temperature includes:

[0085] If the first ambient temperature is greater than the first preset temperature, and the heat dissipation temperature is greater than the second preset temperature, the refrigerant is controlled to flow from the evaporator 4 to the auxiliary wire tube 22 through the second return air pipe 6 .

[0086] If the first ambient temperature of the refrigerator is detected to be greater than 36°C, and the top temperature of the compressor 1 is detected to be greater than 95°C, or the condensing fan temperature is detected to be greater than 85°C, or the speed of the compressor 1 exceeds 3600r / min, the refrigerant is controlled to flow from the evaporator 4 through the second return air pipe 6 to the auxiliary wire tube 22.

[0087] like Figure 5 , which is a schematic diagram of the flow direction of the refrigerant in the refrigeration system 100 in this embodiment. The second control valve V2 controls the refrigerant flowing out of the main wire tube 21 to flow to the throttling device 3 and the evaporator 4 through the first pipeline G1, and then the first control valve V1 controls the refrigerant flowing out of the evaporator 4 to flow into the second return air pipe 6 through the second pipeline G2, and the low-temperature refrigerant in the second return air pipe 6 flows into the auxiliary wire tube 22, thereby reducing the blowing temperature of the condensing fan.

[0088] By adopting the solution of this embodiment, when the first ambient temperature outside the refrigerator and the heat dissipation temperature of the compressor 1 are high, the refrigerant is controlled to flow from the evaporator 4 into the second return air pipe 6, and the ambient air entering the compressor 1 compartment is cooled by the residual cooling of the refrigerant. The ambient air at a lower temperature can achieve a better heat dissipation effect. Specifically, the temperature of the refrigerant flowing out of the evaporator 4 is relatively low. At this time, since the second return air pipe 6 is not attached to the throttling device 3, heat exchange with the throttling device 3 will not occur. The terminal temperature of the second return air pipe 6 is relatively low, and the temperature of the refrigerant passing through the auxiliary wire tube 22 is relatively low. Since the auxiliary wire tube 22 is shuttled in the accommodating space 211 of the main wire tube 21, the wind blown by the condensing fan passes through the auxiliary wire tube 22 and blows toward the compressor 1, which can reduce the blowing temperature of the condensing fan, thereby cooling the compressor 1 compartment, avoiding deformation of the condensing fan bracket in a high temperature environment, and improving the service life of the compressor 1.

[0089] In some other embodiments, when the first ambient temperature is low or the speed of the compressor 1 is low, the refrigerant does not pass through the first return air pipe 5. For example, if it is detected that the first ambient temperature of the refrigerator is ≤36°C, or the temperature at the top of the compressor 1 is ≤95°C, or the temperature of the condensing fan is ≤85°C, or the speed of the compressor 1 is ≤3600r / min, the second control valve V2 controls the refrigerant to flow from the main wire tube 21 to the throttling device 3 and the evaporator 4, and the first control valve V1 controls the refrigerant to flow directly from the evaporator 4 to the compressor 1 through the first return air pipe 5, as shown in FIG. Figure 4 shown.

[0090] In one embodiment, controlling the refrigerant to flow from the evaporator 4 through the second return air pipe 6 to the auxiliary wire pipe 22 includes:

[0091] Detecting the terminal temperature of the second air return pipe 6;

[0092] If the terminal temperature is lower than the third preset temperature, the refrigerant flowing out of the auxiliary wire tube 22 is controlled to flow to the first return air pipe 5 and then to the compressor 1 , wherein the first return air pipe 5 is attached to the throttling device 3 .

[0093] For example, the third preset temperature can be set to 30°C. If the terminal temperature of the second return air pipe 6 is lower than the third preset temperature, the refrigerant flowing out of the auxiliary wire tube 22 is controlled to flow from the fifth pipeline G5 to the first return air pipe 5, and finally flow back to the compressor 1. Since the first return air pipe 5 is attached to the throttling device 3, the low-temperature refrigerant in the first return air pipe 5 exchanges heat with the throttling device 3 before flowing back to the compressor 1, avoiding the liquid hammer phenomenon caused by the refrigerant with too low a temperature flowing into the compressor 1. At this time, the flow direction of the refrigerant is as follows: Figure 6 shown.

[0094] In one embodiment, after controlling the refrigerant to flow from the evaporator 4 through the second return air pipe 6 to the auxiliary wire pipe 22, if the terminal temperature of the second return air pipe 6 is greater than or equal to the third preset temperature, the refrigerant flowing out of the auxiliary wire pipe 22 is controlled to flow directly back to the compressor 1, such as Figure 5 By adopting the above control strategy, the refrigerant flowing out of the auxiliary wire tube 22 directly flows back to the compressor 1, which will not cause liquid hammer. The terminal temperature of the second return air pipe 6 is relatively low, so the temperature of the refrigerant passing through the auxiliary wire tube 22 is relatively low. Since the auxiliary wire tube 22 is shuttled in the accommodating space 211 of the main wire tube 21, the wind blown by the condensing fan passes through the auxiliary wire tube 22 and then blows toward the compressor 1, which can reduce the blowing temperature of the condensing fan, thereby cooling the compressor 1, avoiding deformation of the condensing fan bracket in a high temperature environment, and prolonging the service life of the compressor 1.

[0095] In one embodiment, a water receiving tray is provided below the wire tube condenser 2 of the refrigerator, and the control method includes:

[0096] If the first ambient temperature is greater than the first preset temperature, the heat dissipation temperature is greater than the second preset temperature, and the water level in the water tray is greater than the preset water level, the refrigerant is controlled to flow from the main wire tube 21 through the auxiliary wire tube 22 to the throttling device 3, and then flows back to the compressor 1 after passing through the evaporator 4 and the first return air pipe 5.

[0097] Since the temperature of the refrigerant passing through the auxiliary wire tube 22 is relatively low, condensation may occur. The wire tube condenser 2 is located above the water receiving pan, which may cause the water receiving pan to overflow. Therefore, if the water level in the water receiving pan is greater than the preset water level, that is, when the water receiving pan is about to overflow, the second switching valve is controlled so that the refrigerant flowing out of the main wire tube 21 flows to the auxiliary wire tube 22 through the third pipeline G3, the fifth control valve V5 controls the refrigerant to flow from the condenser to the throttling device 3 and the evaporator 4, and the first control valve V1 controls the refrigerant to flow from the evaporator 4 to the first return air pipe 5, and finally flows back to the compressor 1, as shown in FIG. Figure 7 By adopting the above control strategy, on the one hand, the main wire tube 21 is connected with the auxiliary wire tube 22, which can increase the heat exchange area of ​​the wire tube condenser 2 and effectively improve the heat dissipation efficiency; on the other hand, the refrigerant flowing in the auxiliary wire tube 22 comes from the main wire tube 21, which can avoid the refrigerant temperature passing through the auxiliary wire tube 22 being too low and continuing to produce condensed water.

[0098] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0099] Although the terms first, second, third, etc. can be used in the text to describe multiple 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 only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0100] The above is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments described herein, but will conform to the widest scope consistent with the principles and novel features applied for herein.

Claims

1. A refrigeration system, comprising a compressor, a throttling device, an evaporator, and a first air return pipe arranged in sequence, characterized in that: The refrigeration system comprises a wire tube condenser, and the wire tube condenser comprises: A main body wire tube is wound to form an accommodating space, a first port of the main body wire tube is connected to the exhaust port of the compressor, and a second port of the main body wire tube is connected to the refrigerant inlet of the throttling device through a first pipeline; An auxiliary wire tube, the auxiliary wire tube is shuttled in the accommodating space of the main wire tube, and the third port of the auxiliary wire tube is connected to the second port of the main wire tube; The refrigeration system further comprises a second air return pipe, the starting end of the second air return pipe is connected to the refrigerant outlet of the evaporator through a second pipeline, and the end of the second air return pipe is connected to the fourth port of the auxiliary wire pipe; A first control valve is connected between the first pipeline and the second pipeline to allow at least part of the refrigerant flowing out of the evaporator to flow to the auxiliary wire tube through the second return air pipe after the first control valve is controlled to open.

2. The refrigeration system according to claim 1, characterized in that: in, The second air return pipe is not attached to the throttling device.

3. The refrigeration system according to claim 2, characterized in that: The wire tube condenser includes a second control valve, the third port of the auxiliary wire tube is connected to the second port of the main wire tube through a third pipeline, and the second control valve is arranged between the third pipeline and the first pipeline to allow the refrigerant flowing out of the main wire tube to flow to the auxiliary wire tube through the third pipeline after the second control valve is opened in a controlled manner.

4. The refrigeration system according to claim 3, characterized in that: The wire tube condenser includes a third control valve, the third port of the auxiliary wire tube is connected to the air inlet of the compressor through a fourth pipeline, and the third control valve is arranged between the third pipeline and the fourth pipeline to allow the refrigerant flowing out of the auxiliary wire tube to flow back to the compressor through the fourth pipeline after the third control valve is opened in a controlled manner.

5. The refrigeration system according to claim 4, characterized in that: The starting end of the first return air pipe is connected to the third port of the auxiliary wire tube through the fifth pipeline, and a fourth control valve is arranged between the fourth pipeline and the fifth pipeline to allow the refrigerant flowing out of the fourth port of the auxiliary wire tube to flow to the first return air pipe through the fifth pipeline after the fourth control valve is opened in a controlled manner, wherein the first return air pipe is attached to the throttling device.

6. The refrigeration system according to claim 1, characterized in that: The end of the second return air pipe is connected to the fourth port of the auxiliary wire tube through the sixth pipeline, and the fourth port of the auxiliary wire tube is connected to the refrigerant inlet of the throttling device through the seventh pipeline. A fifth control valve is arranged between the sixth pipeline and the seventh pipeline.

7. The refrigeration system according to claim 1, characterized in that: The main wire tube is provided with a first heat dissipation wire; and / or, The auxiliary wire tube is provided with a second heat dissipation wire.

8. The refrigeration system according to claim 1, characterized in that: A water receiving tray is arranged below the wire tube condenser.

9. A refrigerator, characterized in that: Comprising a refrigeration system as claimed in any one of claims 1 to 8.

10. A refrigerator control method, applied to the refrigerator as claimed in claim 9, characterized in that: The control method comprises: Acquire a first ambient temperature of a refrigerator and a heat dissipation temperature of a compressor of the refrigerator; The refrigerant is controlled to flow from the evaporator to the auxiliary wire tube through the second return air pipe according to the first ambient temperature and the heat dissipation temperature.

11. The control method according to claim 10, characterized in that: The controlling of the refrigerant to flow from the evaporator through the second return air pipe to the auxiliary wire pipe according to the first ambient temperature and the heat dissipation temperature comprises: If the first ambient temperature is greater than a first preset temperature, and the heat dissipation temperature is greater than a second preset temperature, the refrigerant is controlled to flow from the evaporator to the auxiliary wire tube through the second return air pipe.

12. The control method according to claim 10, characterized in that: The control of the refrigerant flowing from the evaporator through the second return air pipe to the auxiliary wire pipe comprises: detecting the terminal temperature of the second air return pipe; If the terminal temperature is lower than a third preset temperature, the refrigerant flowing out of the auxiliary wire tube is controlled to flow toward the compressor through a first return air pipe, wherein the first return air pipe is attached to a throttling device.

13. The control method according to claim 12, characterized in that: include: If the terminal temperature is greater than or equal to a third preset temperature, the refrigerant flowing out of the auxiliary wire tube is controlled to flow directly to the compressor.

14. The control method according to claim 10, characterized in that: A water receiving tray is provided below the wire tube condenser of the refrigerator, and the control method comprises: If the first ambient temperature is greater than the first preset temperature, the heat dissipation temperature is greater than the second preset temperature, and the water level in the water receiving pan is greater than the preset water level, the refrigerant is controlled to flow from the main wire tube through the auxiliary wire tube to the throttling device, and then flow back to the compressor after passing through the evaporator and the first return air pipe.

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