Capillary tube, refrigeration equipment, refrigerator and vehicle
By designing a capillary structure including the first and second thin tubes, the problem of high temperature of the liquid refrigerant in the refrigerator entering the evaporator is solved, and a lower outflow fluid temperature and a stronger refrigeration effect are achieved.
Patent Information
- Application Number
- CN202421531070.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-27
- Publication Date
- 2025-04-08
- Estimated Expiration
- 2034-06-27
AI Technical Summary
The temperature of the liquid refrigerant in the existing refrigerator is relatively high, which affects the refrigeration effect.
A capillary structure including a first thin tube and a second thin tube is designed, the first thin tube is used to wrap the component to be heated, and the second thin tube does not wrap the component to be heated, and its output end is connected to the input end of the first thin tube for gradually cooling the fluid to be cooled.
Through this structure, heat transfer to the part to be heated is avoided from being transferred to the part to be heated, resulting in a lower temperature of the outflow fluid and enhancing the refrigeration effect.
Smart Images
Figure CN222733057U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of refrigeration, and in particular relates to a capillary tube, refrigeration equipment, a refrigerator and a vehicle. Background Art
[0002] Refrigerators are common electrical appliances in daily life. They mainly achieve the cooling effect by consuming electrical energy. Therefore, the power consumption of refrigerators accounts for a large part of the electricity consumption in daily life. In this case, reducing the energy consumption of refrigerators has become a relatively important research direction. The refrigeration system of a common refrigerator includes an evaporator, a condensing device, a capillary tube, a drying filter and a compressor. Its specific working principle is: first, the medium-temperature and low-pressure gaseous refrigerant is compressed into a high-temperature and high-pressure gaseous refrigerant by a compressor, and then the high-temperature and high-pressure gaseous refrigerant enters the condensing device through the exhaust pipe of the compressor and condenses into a high-temperature and medium-pressure liquid refrigerant in the condensing device. Then, the high-temperature and medium-pressure liquid refrigerant enters the capillary tube and forms a low-temperature and low-pressure liquid refrigerant after throttling and depressurization by the capillary tube. Then, the low-temperature and low-pressure liquid refrigerant flows through the evaporator and absorbs a large amount of heat in the refrigerator storage cavity through the evaporator, and then vaporizes into a medium-temperature and low-pressure gaseous refrigerant to achieve the cooling effect of the refrigerator storage cavity. Finally, the medium-temperature and low-pressure gaseous refrigerant enters the compressor again through the return air pipe, thereby achieving a continuous cooling effect.
[0003] Since the temperature of the high-temperature medium-pressure liquid refrigerant is higher than that of the medium-temperature low-pressure gaseous refrigerant, in the prior art, the capillary tubes are all wound around the outer surface of the return air pipe to form a pipe assembly, and then the pipe assembly is installed. In this way, when the refrigerator is running, the gaseous refrigerant in the return air pipe can absorb the heat of the liquid refrigerant in the capillary tube, so the heat dissipation efficiency of the liquid refrigerant in the capillary tube can be improved, thereby reducing the energy consumption of the refrigerator.
[0004] However, when the above-mentioned pipe assembly is used, the temperature of the liquid refrigerant entering the evaporator from the capillary tube will be too high, which will in turn affect the minimum temperature of the liquid refrigerant entering the evaporator, thereby reducing the refrigeration effect of the refrigerator. Utility Model Content
[0005] The purpose of the embodiments of the utility model is to provide a capillary tube, a refrigeration device, a refrigerator and a vehicle, which can solve the problem in the related art that the temperature of the liquid refrigerant entering the evaporator through the capillary tube is too high, thereby reducing the refrigeration effect of the refrigerator.
[0006] In order to solve the above technical problems, the utility model is achieved as follows:
[0007] In the first aspect, the embodiment of the utility model provides a capillary tube, the capillary tube comprising: a first capillary tube and a second capillary tube. The output end of the first capillary tube is connected to the input end of the second capillary tube; the first capillary tube and the second capillary tube are used to cool the fluid to be cooled; the input end of the first capillary tube is used to input the fluid to be cooled, and the first capillary tube is used to wrap around the component to be heated; the temperature of the component to be heated is lower than the temperature of the first capillary tube; the output end of the second capillary tube is used to connect to the refrigeration component and output the cooled fluid, and the second capillary tube does not wrap around the component to be heated.
[0008] Optionally, a ratio M of the length of the second capillary tube to the length of the first capillary tube is in the range of 1 / 3≤M≤1.
[0009] Optionally, the capillary tube further includes a flexible capillary tube; the first capillary tube is connected to the second capillary tube via the flexible capillary tube.
[0010] Optionally, the first capillary tube and / or the second capillary tube comprises a spiral capillary tube.
[0011] In the second aspect, the embodiment of the utility model further provides a refrigeration device, the refrigeration device comprising: a condensing device, an evaporator, a return pipe, a compression device and the capillary tube described in any one of the first aspects above. One end of the return pipe is connected to the output end of the evaporator, the other end of the return pipe is connected to the input end of the compression device, and the output end of the compression device is connected to the condensing device; the input end of the first capillary is connected to the condensing device, and the first capillary is wound around the return pipe; the second capillary is not wound around the component to be heated, and the output end of the second capillary is connected to the input end of the evaporator.
[0012] Optionally, the refrigeration equipment further comprises a heat insulation plate, wherein the heat insulation plate is arranged between the evaporator and the condensing device.
[0013] Optionally, the refrigeration device further includes a heat insulation layer, and the second capillary tube is arranged in the heat insulation layer.
[0014] Optionally, the first capillary tube includes a fixed section and a heat dissipation section, the fixed section is fixedly connected to the insulation board, the heat dissipation section is arranged on a side of the insulation board close to the condensing device, and the second capillary tube is arranged on a side of the insulation board close to the evaporator.
[0015] Optionally, a ratio N of the length of the fixed section to the length of the heat dissipation section is in the range of 1 / 10≤N≤1 / 8.
[0016] Optionally, the first thin tube is wound around an end of the return tube away from the compression device.
[0017] In a third aspect, an embodiment of the utility model further provides a refrigerator, comprising the refrigeration device described in any one of the second aspects above.
[0018] In a fourth aspect, an embodiment of the utility model further provides a vehicle, wherein the vehicle comprises the refrigerator as described in the third aspect.
[0019] In the embodiment of the present application, the output end of the first capillary is connected to the input end of the second capillary; the first capillary and the second capillary are used to cool the fluid to be cooled; the input end of the first capillary is used to input the fluid to be cooled, and the output end of the second capillary is used to connect to the refrigeration component and output the cooled fluid. In this way, after the fluid to be cooled flows in from the input end of the first capillary, the temperature will drop after the cooling effect of the first capillary and the second capillary. After the cooled fluid flows into the refrigeration component, it can cool the component to be cooled, thereby achieving the cooling effect.
[0020] Among them, the capillary tube is a common and important component in refrigeration equipment. Its function is to throttle and reduce the pressure when a high-temperature and medium-pressure liquid fluid flows through the capillary tube, thereby forming a low-temperature and low-pressure liquid fluid. The diameter of the capillary tube is small, so when the fluid to be cooled flows into the first capillary and the second capillary, the fluid to be cooled will encounter greater resistance when passing through, thereby slowing down the flow rate. At this time, the fluid to be cooled absorbs heat, which can reduce the temperature of the fluid. In addition, since the fluid to be cooled is gradually cooled after flowing into the capillary tube, specifically, the temperature of the fluid to be cooled when it flows through the first capillary is higher than the temperature when it flows through the second capillary, so the temperature of the first capillary is higher than the temperature of the second capillary.
[0021] Next, since the temperature of the component to be heated is lower than the temperature of the first capillary tube, specifically, the temperature of the component to be heated is lower than the temperature of the first capillary tube and higher than the temperature of the second capillary tube, and the temperature of the connection between the first capillary tube and the second capillary tube is the same as the temperature of the component to be heated. Therefore, there is a temperature difference between the first capillary tube and the component to be heated. Since the first capillary tube is used to wrap around the component to be heated, the heat of the first capillary tube can be transferred to the component to be heated, thereby increasing the temperature of the component to be heated.
[0022] Next, since the end of the second capillary is fixed and the other parts of the second capillary are hollowed out, when the temperature of the fluid in the capillary drops to the same temperature as the component to be heated, it will be separated from the component to be heated, and then the fluid in the capillary will continue to cool down in the second capillary. Therefore, compared with the solution in the related art that the capillary is completely wrapped around the outer surface of the component to be heated, the heat transfer from the component to be heated to the fluid at the output end of the capillary is avoided, thereby making the temperature of the fluid flowing out of the capillary lower, so that the cooling effect can be enhanced.
[0023] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are listed below. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:
[0025] Figure 1 This is a structural schematic diagram of a capillary tube provided by an embodiment of the utility model when installed in a refrigeration device;
[0026] Figure 2 It is a structural schematic diagram of another refrigeration device provided by an embodiment of the utility model;
[0027] Figure 3 It is a schematic diagram of the working principle of the refrigeration equipment provided in an embodiment of the present application during operation.
[0028] Description of reference numerals:
[0029] 1-capillary tube, 11-first capillary tube, 111-fixed section, 112-heat dissipation section, 12-second capillary tube, 13-flexible capillary tube, 2-component to be heated, 21-reflux pipe, 3-refrigeration component, 31-evaporator, 4-condensing device, 5-compression device, 6-drying device, 7-heat dissipation device, 8-insulation board, 9-insulation layer, 100-refrigeration equipment. DETAILED DESCRIPTION
[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0031] The terms "first", "second", etc. in the specification and claims of the present utility model are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the utility model can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.
[0032] The capillary tube 1, the refrigeration device 100, the refrigerator and the vehicle provided in the embodiment of the utility model are described in detail below through specific embodiments and application scenarios in conjunction with the accompanying drawings.
[0033] Figure 1 It is a schematic structural diagram of a capillary tube 1 provided in an embodiment of the utility model when it is installed in a refrigeration device 100.
[0034] See also Figure 1 The capillary tube 1 comprises: a first capillary tube 11 and a second capillary tube 12. The output end of the first capillary tube 11 is connected to the input end of the second capillary tube 12; the first capillary tube 11 and the second capillary tube 12 are used to cool the fluid to be cooled; the input end of the first capillary tube 11 is used to input the fluid to be cooled, and the first capillary tube 11 is used to wind around the component to be heated 2; the temperature of the component to be heated 2 is lower than the temperature of the first capillary tube 11; the output end of the second capillary tube 12 is used to connect to the refrigeration component 3 and output the cooled fluid, and the second capillary tube 12 does not wind around the component to be heated 2.
[0035] In the embodiment of the present application, the output end of the first capillary 11 is connected to the input end of the second capillary 12; the first capillary 11 and the second capillary 12 are used to cool the fluid to be cooled; the input end of the first capillary 11 is used to input the fluid to be cooled, and the output end of the second capillary 12 is used to connect to the refrigeration component 3 and output the cooled fluid. In this way, after the fluid to be cooled flows in from the input end of the first capillary 11 and passes through the cooling effect of the first capillary 11 and the second capillary 12, the temperature will drop. After the cooled fluid flows into the refrigeration component 3, it can cool the component to be cooled, thereby achieving the cooling effect.
[0036] Among them, the capillary tube 1 is a common and important component in the refrigeration equipment 100, and its function is to play a role of throttling and reducing pressure when a high-temperature and medium-pressure liquid fluid flows through the capillary tube 1, thereby forming a low-temperature and low-pressure liquid fluid. The diameter of the capillary tube 1 is relatively small, and can be specifically less than 1 mm. In this way, when the fluid to be cooled flows into the first capillary 11 and the second capillary 12, the fluid to be cooled will encounter greater resistance when passing through, thereby slowing down the flow rate. At this time, the fluid to be cooled absorbs heat, which can reduce the temperature of the fluid. In addition, since the fluid to be cooled is gradually cooled after flowing into the capillary tube 1, specifically, the temperature of the fluid to be cooled when it flows through the first capillary 11 is higher than the temperature when it flows through the second capillary 12, so the temperature of the first capillary 11 is higher than the temperature of the second capillary 12.
[0037] Next, since the temperature of the component 2 to be heated is lower than the temperature of the first capillary tube 11, specifically, the temperature of the component 2 to be heated is lower than the temperature of the first capillary tube 11 and higher than the temperature of the second capillary tube 12, and the temperature at the connection between the first capillary tube 11 and the second capillary tube 12 is the same as the temperature of the component 2 to be heated. Therefore, there is a temperature difference between the first capillary tube 11 and the component 2 to be heated. Since the first capillary tube 11 is used to wrap around the component 2 to be heated, the heat of the first capillary tube 11 can be transferred to the component 2 to be heated, thereby increasing the temperature of the component 2 to be heated.
[0038] Next, since the second capillary 12 is not wound around the component to be heated 2, when the temperature of the fluid in the capillary 1 drops to the same temperature as the component to be heated 2, it is separated from the component to be heated 2, and the fluid in the capillary 1 continues to cool down in the second capillary 12. Therefore, compared with the solution in the related art in which the capillary 1 is completely wound around the outer surface of the component to be heated 2, the heat transfer from the component to be heated 2 to the fluid at the output end of the capillary 1 is avoided, thereby making the temperature of the fluid flowing out of the capillary 1 lower, thereby enhancing the cooling effect.
[0039] It should be noted that the first capillary tube 11 and the second capillary tube 12 may be capillary tubes with a circular cross section, a rectangular cross section, or other cross-sectional shapes, which are not limited in the present embodiment. The first capillary tube 11 and the second capillary tube 12 are made of a metal material with low hardness and good thermal conductivity, which may be a copper tube, an aluminum tube, or a metal tube of other materials, which are not limited in the present embodiment.
[0040] It should also be noted that the above-mentioned fluid can be a refrigerant liquid or a refrigerant gas, which is not limited in the embodiments of the present application. The refrigerant liquid or the refrigerant gas are different material forms corresponding to the refrigerant, and its specific components can be Freon or saturated hydrocarbons, or other refrigerants with the same function, which is not limited in the embodiments of the present application.
[0041] Among them, Freon is a general term for derivatives of saturated hydrocarbons in which all or part of the hydrogen element is replaced by halogen elements such as chlorine, fluorine and bromine. It is one of the most commonly used refrigerants at present. It has the characteristics of high safety and high refrigeration efficiency. Saturated hydrocarbons are a kind of organic compound mainly including methane, ethane, propane, butane and rings. Because it is environmentally friendly and pollution-free, it can be used as the main refrigerant in the future. After passing through the throttling and pressure reduction effect of the capillary tube 1, the refrigerant can absorb heat and cool in the evaporator 31.
[0042] It should also be noted that the above-mentioned component 2 to be heated refers to a component that needs to absorb heat, which can be a liquid return pipe or an air return pipe, and the embodiment of the present application does not limit this.
[0043] It should also be noted that the second capillary tube 12 is not wound around the component to be heated 2, and the second capillary tube 12 may be suspended in the air, that is, the tube wall of the second capillary tube 12 is not in direct contact with other components.
[0044] Optionally, in some embodiments, see Figure 1 , the ratio M of the length of the second capillary tube 12 to the length of the first capillary tube 11 is in the range of 1 / 3≤M≤1.
[0045] Since the first capillary 11 is used to transfer the heat of the fluid to the component 2 to be heated, the second capillary 12 is used to continue cooling the fluid after the capillary 1 is separated from the component 2 to be heated, thereby lowering the temperature of the fluid. Since the second capillary 12 is used to continue to dissipate heat, the surface area of the second capillary 12 should not be too small to ensure that it can dissipate heat normally. At the same time, in order to ensure that the pressure requirement of the fluid can be met when the fluid flows out of the second capillary 12, the second capillary 12 should not be set too long, so the length of the second capillary 12 needs to be set within an appropriate range.
[0046] After many experiments, it is shown that when the ratio M of the length of the second capillary tube 12 to the length of the first capillary tube 11 is set to 1 / 3≤M≤1, the above technical effect is more significant. In addition, setting the lengths of the first capillary tube 11 and the second capillary tube 12 according to the above ratio is beneficial to the space arrangement in the case when the capillary tube 1 is installed in the case of the refrigeration device 100, thereby helping to reduce the volume of the refrigeration device 100.
[0047] Optionally, in some embodiments, see Figure 1The capillary tube 1 further includes a flexible capillary tube 13; the first capillary tube 11 is connected to the second capillary tube 12 through the flexible capillary tube 13. Since the first capillary tube 11 is wound around the component to be heated 2, and the second capillary tube 12 is not wound around the component to be heated 2, when the capillary tube 1 is installed in the refrigeration device 100, the first capillary tube 11 and the second capillary tube 12 are located at different spatial positions. The flexible capillary tube 13 is used to connect the two so that the first capillary tube 11 and the second capillary tube 12 can be bent freely, thereby facilitating the installation of the capillary tube 1.
[0048] It should be noted that the above-mentioned flexible thin tube 13 can be a flexible metal tube, a flexible rubber tube, or a thin tube made of other flexible materials, which is not limited in the embodiment of the present application.
[0049] Optionally, in some embodiments, see Figure 1 The first capillary tube 11 and / or the second capillary tube 12 include a spiral capillary tube. Since the spiral pipe occupies less space than other shapes, it is convenient to install the pipe, thus improving the installation efficiency. In addition, it is also helpful to reduce the volume of the refrigeration device 100.
[0050] It should be noted that the above-mentioned spiral capillary can be a spiral capillary with a circular cross-section or a spiral capillary with a rectangular cross-section. The specific shape depends on the cross-sectional shape of the component 2 to be heated, and the embodiment of the present application does not limit this.
[0051] The present application also discloses a refrigeration device 100, see Figure 1 and Figure 2 The refrigeration device 100 includes: a condensing device 4, an evaporator 31, a return pipe 21, a compression device 5 and any one of the above capillary tubes 1. One end of the return pipe 21 is connected to the output end of the evaporator 31, and the other end of the return pipe 21 is connected to the input end of the compression device 5, and the output end of the compression device 5 is connected to the condensing device 4; the input end of the first capillary 11 is connected to the condensing device 4, and the first capillary 11 is wound around the return pipe 21; the second capillary 12 is not wound around the component to be heated 2, and the output end of the second capillary 12 is connected to the input end of the evaporator 31.
[0052] See also Figure 3The working principle of the refrigeration device 100 is as follows: first, the medium-temperature and low-pressure gaseous refrigerant is compressed into a high-temperature and high-pressure gaseous refrigerant by the compression device 5, and then the high-temperature and high-pressure gaseous refrigerant enters the condensing device 4 through the exhaust pipe of the compression device 5 and is condensed into a high-temperature and medium-pressure liquid refrigerant in the condensing device 4. Next, the high-temperature and medium-pressure liquid refrigerant enters the capillary tube 1 and forms a low-temperature and low-pressure liquid refrigerant after throttling and depressurization by the capillary tube 1. Next, the low-temperature and low-pressure liquid refrigerant flows through the evaporator 31 and absorbs a large amount of heat through the evaporator 31, and then vaporizes into a medium-temperature and low-pressure gaseous refrigerant to achieve the refrigeration effect of the refrigeration device 100. Finally, the medium-temperature and low-pressure gaseous refrigerant enters the compression device 5 again through the return pipe 21, thereby achieving a continuous refrigeration effect.
[0053] In the embodiment of the present application, when the refrigeration device 100 is in operation, after the high-temperature medium-pressure liquid refrigerant flows into the first capillary tube 11 and the second capillary tube 12, the liquid refrigerant will encounter greater resistance when passing through, thereby slowing down the flow rate. At this time, the temperature of the liquid refrigerant decreases. In addition, since the liquid refrigerant gradually cools down after flowing into the capillary tube 1, specifically, the temperature of the liquid refrigerant when flowing through the first capillary tube 11 is higher than the temperature when flowing through the second capillary tube 12, the temperature of the first capillary tube 11 is higher than the temperature of the second capillary tube 12.
[0054] Next, since the temperature of the return tube 21 is lower than the temperature of the first capillary tube 11, specifically, the temperature of the return tube 21 is lower than the temperature of the first capillary tube 11 and higher than the temperature of the second capillary tube 12, and the temperature at the connection between the first capillary tube 11 and the second capillary tube 12 is the same as the temperature of the return tube 21, there is a temperature difference between the first capillary tube 11 and the return tube 21.
[0055] In the embodiment of the present application, the return pipe 21 is a return pipe, which is used to transport the gaseous refrigerant to the compression device 5, and then be compressed into a liquid refrigerant. Therefore, it is necessary to ensure that the gaseous refrigerant cannot be liquefied into a liquid refrigerant in the return pipe, otherwise liquid refrigerant will enter the compressor and damage the compression device 5. In view of this problem, the first capillary tube 11 is wound around the return pipe, so that the heat of the first capillary tube 11 can be transferred to the return pipe to increase the temperature of the return pipe, thereby preventing the gaseous refrigerant from being liquefied into a liquid refrigerant in the return pipe, so that the compression device 5 can be ensured not to be damaged, and the service life of the refrigeration equipment 100 is extended.
[0056] Next, since the second capillary tube 12 is not wound around the return pipe, when the temperature of the liquid refrigerant in the capillary tube 1 drops to the same temperature as the return pipe, it will be separated from the return pipe, and the liquid refrigerant in the capillary tube 1 will continue to cool down in the second capillary tube 12. Therefore, compared with the solution in the related art that the capillary tube 1 is completely wound around the outer surface of the return pipe, the heat transfer from the return pipe to the liquid refrigerant at the output end of the capillary tube 1 is avoided, thereby making the temperature of the liquid refrigerant flowing out of the capillary tube 1 lower, so that the refrigeration effect of the refrigeration device 100 can be enhanced.
[0057] In order to make the liquid refrigerant entering the capillary tube 1 from the condensing device 4 free of water, a drying device 6 can be arranged between the condenser and the capillary tube 1. One end of the drying device 6 is connected to the condenser, and the other end is connected to the capillary tube 1. After the liquid refrigerant flows through the drying device 6, the water inside it can be removed.
[0058] It should be noted that the drying device 6 may be a desiccant box, a gas washing bottle, or other devices with the same function, which is not limited in the embodiment of the present application.
[0059] It should also be noted that the above-mentioned condensing device 4 can be a liquid condenser or a gas condenser, which is not limited in the embodiment of the present application.
[0060] In order to discharge the heat generated by the condenser in time, a heat dissipation device 7 may be provided on the surface of the condenser. The heat dissipation device 7 may be a heat dissipation fan or a cooling water tank, which is not limited in the embodiment of the present application.
[0061] Optionally, in some embodiments, see Figure 1 and Figure 2 The refrigeration device 100 further includes a heat insulation board 8, which is disposed between the evaporator 31 and the condensing device 4. Since the temperature of the refrigerant in the components close to the evaporator 31 is lower than the temperature of the refrigerant in the components close to the condensing device 4, in order to reduce the mutual influence between the two sides, a heat insulation board 8 is disposed between the evaporator 31 and the condensing device 4. The heat insulation board 8 has poor thermal conductivity, which can effectively prevent heat from being transferred from the side close to the condensing device 4 to the side close to the evaporator 31, thereby preventing heat from being transferred to the liquid refrigerant entering the evaporator 31, so that the temperature of the liquid refrigerant entering the evaporator 31 can be lower, thereby enhancing the refrigeration effect of the refrigeration device 100.
[0062] It should be noted that the above-mentioned insulation board 8 can be a porous material board or a vacuum insulation board, or other types of insulation boards 8, which are not limited in the present embodiment. When it is a porous material board, it can be a foam material board or a fiber material board; when it is a vacuum insulation board, the insulation board 8 includes a vacuum cavity inside for heat insulation.
[0063] Optionally, in some embodiments, see Figure 1 and Figure 2 The refrigeration device 100 further includes a heat insulating layer 9, and the second capillary tube 12 is arranged in the heat insulating layer 9. The specific arrangement is that the second capillary tube 12 is wrapped in the heat insulating layer 9. In this way, the heat transferred from the external environment to the second capillary tube 12 can be reduced, and the temperature of the liquid refrigerant entering the evaporator 31 is further ensured to be low, thereby further enhancing the refrigeration effect of the refrigeration device 100.
[0064] It should be noted that the above-mentioned insulation layer 9 can be a foam insulation layer 9, a rock wool insulation layer 9, or other insulation layers 9 with the same function, which is not limited in the embodiment of the present application.
[0065] Optionally, in some embodiments, see Figure 1 and Figure 2 The first capillary tube 11 includes a fixed section 111 and a heat dissipation section 112, wherein the fixed section 111 is fixedly connected to the heat insulation board 8, the heat dissipation section 112 is arranged on a side of the heat insulation board 8 close to the condensing device 4, and the second capillary tube 12 is arranged on a side of the heat insulation board 8 close to the evaporator 31. The fixed section 111 occupies a smaller portion of the total length of the first capillary tube 11, and the heat dissipation section 112 occupies a larger portion of the total length of the first capillary tube 11.
[0066] In the embodiment of the present application, since the first capillary tube 11 includes a fixed section 111 and a heat dissipation section 112, the fixed section 111 is fixedly connected to the heat insulation board 8, so that the first capillary tube 11 can be fixed by the heat insulation board 8, thereby ensuring that the first capillary tube 11 can always be in effective contact with the return air pipe, thereby ensuring that the return air pipe can be heated.
[0067] Next, since the heat dissipation section 112 is arranged on the side of the insulation board 8 close to the condensing device 4, and the second capillary tube 12 is arranged on the side of the insulation board 8 close to the evaporator 31, most of the first capillary tube 11 and the second capillary tube 12 are separated by the insulation board 8, thereby reducing the influence of the higher temperature liquid refrigerant in the first capillary tube 11 on the lower temperature liquid refrigerant in the second capillary tube 12, and thus reducing the heat absorbed by the second capillary tube 12. Therefore, the temperature of the liquid refrigerant entering the evaporator 31 can be made lower, thereby enhancing the refrigeration effect of the refrigeration equipment 100.
[0068] It should be noted that the above-mentioned fixed connection can be a plug-in, adhesive or bolt connection, or other connection methods, which is not limited in the embodiments of the present application.
[0069] Optionally, in some embodiments, see Figure 1 and Figure 2, the range of the ratio N of the length of the fixed section 111 to the length of the heat dissipation section 112 is: 1 / 10≤N≤1 / 8.
[0070] Since the first capillary 11 is divided into a fixed section 111 and a heat dissipation section 112 by the heat insulation plate 8, the fixed section 111 is only used to fix the first capillary 11, and the heat dissipation section 112 is only used for heat dissipation. In order to ensure the heat dissipation effect of the first capillary 11, it is necessary to make the heat dissipation section 112 as long as possible on the basis of ensuring that the first capillary 11 can be firmly fixed. After many experiments, it has been shown that when the ratio M of the length of the fixed section 111 to the length of the heat dissipation section 112 is set to 1 / 10≤M≤1 / 8, the above technical effect is more significant. In addition, setting the lengths of the fixed section 111 and the heat dissipation section 112 according to the above ratio is beneficial to the space layout in the chassis when the capillary 1 is installed in the chassis of the refrigeration equipment 100, and further helps to reduce the volume of the refrigeration equipment 100.
[0071] Optionally, in some embodiments, see Figure 1 and Figure 2 , the first thin tube 11 is wound around the return pipe 21 at one end away from the compression device 5. When the return pipe 21 is an air return pipe, the return pipe 21 is used to transport the gaseous refrigerant to the compression device 5, and then compress it into a liquid refrigerant. Therefore, it must be ensured that the gaseous refrigerant cannot be liquefied into a liquid refrigerant in the air return pipe, otherwise the liquid refrigerant will enter the compressor and damage the compression device 5. In response to this problem, the first thin tube 11 is wound around the return pipe 21, so that the heat of the first thin tube 11 can be transferred to the return pipe 21 to increase the temperature of the return pipe 21, and then the return pipe 21 with increased temperature will transfer the heat to the gaseous refrigerant inside the return pipe 21, thereby increasing the temperature of the gaseous refrigerant inside the return pipe 21, so that the gaseous refrigerant can be prevented from liquefying and causing the liquid to enter the compression device 5. Among them, the compression device 5 can be a compressor or an extruder, which is not limited in the embodiments of the present application.
[0072] However, it takes a certain amount of time for the heat to be transferred from the first capillary tube 11 to the return pipe 21 and then to the gaseous refrigerant from the return pipe 21. Winding the first capillary tube 11 around the end of the return pipe 21 away from the compression device 5 can provide sufficient time for the heat transfer process, so that this part of the heat can be effectively transferred to the gaseous refrigerant inside the return pipe 21.
[0073] The embodiment of the present application also discloses a refrigerator, which includes any one of the above-mentioned refrigeration devices 100. In addition, the refrigerator also includes a refrigeration chamber. The evaporator 31 of the refrigeration device 100 is connected to the refrigeration chamber and can absorb the heat of the refrigeration chamber. In this way, when the low-temperature and low-pressure liquid refrigerant flows through the evaporator 31, it can absorb a large amount of heat from the refrigeration chamber, thereby achieving a refrigeration effect of the refrigeration chamber. Then, the medium-temperature and low-pressure gaseous refrigerant flowing out of the evaporator 31 enters the compression device 5 again through the return pipe 21, thereby achieving a continuous refrigeration effect, so that the refrigerator can achieve a continuous refrigeration effect.
[0074] In the embodiment of the present application, one end of the return pipe 21 of the refrigeration equipment 100 is connected to the output end of the evaporator 31, the other end of the return pipe 21 is connected to the input end of the compression device 5, and the output end of the compression device 5 is connected to the condensing device 4; the input end of the first capillary 11 is connected to the condensing device 4, and the first capillary 11 is wrapped around the return pipe 21; the second capillary 12 is not wrapped around the return pipe 21, and the output end of the second capillary 12 is connected to the input end of the evaporator 31.
[0075] Among them, the return pipe 21 is a return pipe, and the first capillary 11 is wound around the return pipe, so that the heat of the first capillary 11 can be transferred to the return pipe to increase the temperature of the return pipe, thereby preventing the gaseous refrigerant from liquefying into liquid refrigerant in the return pipe, so that the compression device 5 can be guaranteed not to be damaged, and the service life of the refrigeration device 100 is extended, thereby extending the service life of the refrigerator. The second capillary 12 of the refrigeration device 100 is not wound around the return pipe 21, so that when the temperature of the liquid refrigerant in the capillary tube 1 drops to the same as the temperature of the return pipe, it is separated from the return pipe, and then the liquid refrigerant in the capillary tube 1 continues to cool down in the second capillary 12. Therefore, compared with the solution of winding the capillary tube 1 entirely around the outer surface of the return pipe in the related art, the heat transfer from the return pipe to the liquid refrigerant at the output end of the capillary tube 1 is avoided, thereby making the temperature of the liquid refrigerant flowing out of the capillary tube 1 lower, so that the refrigeration effect of the refrigeration device 100 can be enhanced, thereby enhancing the refrigeration effect of the refrigerator.
[0076] It should be noted that the above-mentioned refrigerator refers to a low-temperature container in a broad sense, which can be an ordinary refrigerator, a freezer, or other devices with the same function, and the present embodiment of the application does not limit this. When it is an ordinary refrigerator, it can be an upright refrigerator or a freezer, and the present embodiment of the application does not limit this.
[0077] The embodiment of the present application also discloses a vehicle, which includes any of the above-mentioned refrigerators. In this way, the refrigerator can be used as a vehicle refrigerator, so that the vehicle has a portable refrigeration device. The vehicle refrigerator is compact in design and convenient to carry and use in a mobile environment such as a car. It can not only refrigerate food, but also refrigerate medicines, or meet other needs of users. The vehicle refrigerator is usually powered by a car battery.
[0078] The vehicle may be a car, a truck, an ambulance or a refrigerated truck, or other vehicles with the same functions, which are not limited in the embodiments of the present application. When the vehicle refrigerator is installed on a family car or a truck, drinks or food can be placed in the refrigerator, and passengers can take them out and eat them at any time when going out, which can improve the user's driving experience. When the vehicle refrigerator is installed on an ambulance, medicines that need to be refrigerated can be placed. In this way, the corresponding medicines can be used in time when rescuing patients.
[0079] It should be noted that when the refrigerator is installed in a vehicle, it is necessary to ensure that the refrigerator will not be subjected to violent impact to prevent the refrigerant inside from leaking, thereby ensuring the safety of the passengers.
[0080] 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 it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.
Claims
1. A capillary tube (1), characterized in that: include: A first capillary tube (11) and a second capillary tube (12); The output end of the first capillary tube (11) is connected to the input end of the second capillary tube (12); the first capillary tube (11) and the second capillary tube (12) are used to cool the fluid to be cooled; The input end of the first capillary tube (11) is used to input a fluid to be cooled, and the first capillary tube (11) is used to wind around a component to be heated (2); the temperature of the component to be heated (2) is lower than the temperature of the first capillary tube (11); The output end of the second thin tube (12) is used to connect to the refrigeration component (3) and to output the cooled fluid, and the second thin tube (12) is not wound around the component to be heated (2).
2. The capillary tube (1) according to claim 1, characterized in that The ratio M of the length of the second capillary tube (12) to the length of the first capillary tube (11) is in the range of 1 / 3≤M≤1.
3. The capillary tube (1) according to claim 1, characterized in that The capillary tube (1) further comprises a flexible capillary tube (13); The first capillary tube (11) is connected to the second capillary tube (12) via the flexible capillary tube (13).
4. The capillary tube (1) according to claim 1, characterized in that The first capillary tube (11) and / or the second capillary tube (12) comprises a spiral capillary tube.
5. A refrigeration device (100), characterized in that: include: A condensing device (4), an evaporator (31), a reflux pipe (21), a compression device (5), and a capillary tube (1) according to any one of claims 1 to 4; one end of the reflux pipe (21) is connected to the output end of the evaporator (31), the other end of the reflux pipe (21) is connected to the input end of the compression device (5), and the output end of the compression device (5) is connected to the condensing device (4); The input end of the first thin tube (11) is connected to the condensing device (4), and the first thin tube (11) is wound around the reflux tube (21); The second thin tube (12) does not wind around the component to be heated (2), and the output end of the second thin tube (12) is connected to the input end of the evaporator (31).
6. The refrigeration device (100) according to claim 5, characterized in that: The refrigeration device (100) further comprises a heat insulation board (8), wherein the heat insulation board (8) is arranged between the evaporator (31) and the condensing device (4).
7. The refrigeration device (100) according to claim 6, characterized in that: The refrigeration device (100) further comprises a heat insulation layer (9), and the second capillary tube (12) is arranged in the heat insulation layer (9).
8. The refrigeration device (100) according to claim 6, characterized in that: The first capillary tube (11) comprises a fixed section (111) and a heat dissipation section (112); the fixed section (111) is fixedly connected to the heat insulation board (8); the heat dissipation section (112) is arranged on a side of the heat insulation board (8) close to the condensing device (4); and the second capillary tube (12) is arranged on a side of the heat insulation board (8) close to the evaporator (31).
9. The refrigeration device (100) according to claim 8, characterized in that: The ratio N of the length of the fixing section (111) to the length of the heat dissipation section (112) is in the range of 1 / 10≤N≤1 / 8.
10. The refrigeration device (100) according to claim 5, characterized in that: The first thin tube (11) is wound around an end of the return tube (21) away from the compression device (5).
11. A refrigerator, characterized in that: The refrigeration device (100) comprises any one of claims 5 to 10.
12. A vehicle, characterized in that: Including the refrigerator according to claim 11.