Gas-liquid separation device and thermal management system
By designing a gas-liquid separation device in the electric vehicle thermal management system, and using the end cap assembly and bypass section to heat the refrigerant, the problems of reduced refrigerant miscibility and difficulty in oil return at low temperatures are solved, thereby improving heating efficiency and system adaptability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ZHEJIANG LEAPMOTOR TECH CO LTD
- Filing Date
- 2023-07-27
- Publication Date
- 2026-06-05
AI Technical Summary
At low and ultra-low temperatures, the miscibility of the lubricant and refrigerant in the gas-liquid separation device of the electric vehicle thermal management system decreases, leading to oil return problems in the compressor and low heating efficiency of the heat pump system, making it unable to work effectively.
Design a gas-liquid separation device, including an end cap assembly and a gas-liquid separation assembly. The end cap assembly guides high-temperature refrigerant to the bottom of the receiving cavity, and selectively guides the refrigerant to the bottom of the receiving cavity along the bypass section for heating, thereby increasing the refrigerant evaporation rate and pressure, and ensuring the refrigerant flow rate.
It effectively improves the heating capacity and environmental adaptability of the thermal management system under various temperature conditions, ensuring normal oil return and stable operation of the compressor.
Smart Images
Figure CN117029323B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of vehicle thermal management systems, and in particular to a gas-liquid separation device and thermal management system. Background Technology
[0002] With the increasing prevalence of new energy electric vehicles, research on electric vehicle thermal management systems has become increasingly important. Current electric vehicle thermal management includes battery thermal management, passenger compartment air conditioning system, and motor control thermal management. However, since pure electric vehicles lack the heat source of traditional car engines, the heating problem of the battery pack and passenger compartment in low-temperature environments has become a key issue in the design of thermal management system architecture. Most models use heat pump + PTC (Positive Temperature Coefficient) technology to heat the passenger compartment or battery pack at low temperatures. PTC has the characteristics of fast heating speed and is not affected by ambient temperature, but it has low heating efficiency and high energy consumption. Due to factors such as secondary indirect heat transfer, the COP << 1. Heat pumps, such as compressors, have a high heating efficiency ratio, far exceeding that of PTC systems. However, the operation of heat pump systems is significantly limited by ambient temperature. At low temperatures, the refrigerant evaporation pressure is low, leading to a decrease in compressor suction density and a reduction in refrigerant mass flow rate at the same speed. This results in a substantial decrease in the heating capacity and efficiency of the entire heat pump system. In addition, at low temperatures, the lubricating material and refrigerant in the gas-liquid separator exhibit stratification due to reduced miscibility at low temperatures. Furthermore, the viscosity of the lubricating material increases with decreasing temperature, making compressor oil return a challenge. Under ultra-low temperature conditions, the evaporation pressure is even lower, less than or equal to atmospheric pressure, rendering the system essentially inoperable. Summary of the Invention
[0003] This application provides a gas-liquid separation device and a thermal management system, which are used to improve the heating capacity of the thermal management system and enhance its environmental adaptability.
[0004] To solve the above-mentioned technical problems, the technical solution adopted in this application is as follows: a gas-liquid separation device is provided, including: an end cap assembly having a first channel and a second channel spaced apart from the first channel; a gas-liquid separation component including: a receiving cavity having an opening at the top communicating with the receiving cavity, the end cap assembly covering the opening; a gas-liquid separation section disposed within the receiving cavity; and a bypass section disposed within the receiving cavity and extending from the opening to the bottom of the receiving cavity, the bypass section communicating with the first channel and the receiving cavity; wherein, the end cap assembly is configured to guide a first refrigerant to the gas-liquid separation section along the second channel, and selectively guide a second refrigerant to the bottom of the receiving cavity along the first channel and the bypass section, so as to at least heat the refrigerant at the bottom of the receiving cavity; wherein, the temperature of the second refrigerant is higher than that of the refrigerant at the bottom of the receiving cavity.
[0005] The beneficial effects of the embodiments of this application are as follows: The gas-liquid separation device of this application includes an end cap assembly and a gas-liquid separation assembly. The end cap assembly is provided with a first channel and a second channel. The gas-liquid separation assembly includes a bypass portion, a gas-liquid separation portion and a receiving cavity. The end cap assembly is configured to guide a first refrigerant to the gas-liquid separation portion along the second channel and selectively guide a second refrigerant to the bottom of the receiving cavity along the first channel and the bypass portion, so as to heat at least the refrigerant at the bottom of the receiving cavity. In the above manner, when the gas-liquid separator is operating at ultra-low temperatures, it can guide the second refrigerant to the bottom of the containment cavity through the end cap assembly and bypass section, thereby increasing the evaporation rate of the refrigerant in the containment cavity and effectively increasing the refrigerant pressure in the containment cavity, which in turn effectively increases the flow rate of the thermal management system. When the gas-liquid separator is operating at a suitable temperature, it can de-circulate the second channel in the end cap assembly, thereby effectively ensuring the refrigerant flow rate of the thermal management system. Based on the above method, the refrigerant flow rate of the thermal management system can be effectively increased under any temperature conditions, thereby effectively improving the heating capacity of the thermal management system under various temperature conditions and enhancing the environmental adaptability of the thermal management system. Attached Figure Description
[0006] Figure 1 This is a schematic diagram of the structure of an embodiment of the thermal management system of this application;
[0007] Figure 2 This is an exploded schematic diagram of an embodiment of the gas-liquid separation device of this application;
[0008] Figure 3 Figure 1 Schematic diagram of the assembly structure of the gas-liquid separation unit;
[0009] Figure 4 yes Figure 3 A schematic diagram of the gas-liquid separation device from direction A;
[0010] Figure 5 This is a schematic diagram of the gas-liquid separation device of this application along section B;
[0011] Figure 6 This is a schematic diagram of the gas-liquid separation device of this application along the C-direction;
[0012] Figure 7 This is a schematic diagram of the gas-liquid separation device of this application along the D-axis;
[0013] Figure 8 yes Figure 2 A schematic diagram of the middle buffer component. Detailed Implementation
[0014] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0015] The terms "first" and "second" in this application are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise expressly specified. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such processes, methods, products, or apparatus.
[0016] This application provides a gas-liquid separation device 10, which can be applied to the thermal management system 40 of a vehicle, especially the thermal management system 40 of an electric vehicle. However, this does not limit the application scope of the gas-liquid separation device 10. In other embodiments, the gas-liquid separation device 10 of this application can also be applied to the thermal management system 40 of other devices or the gas-liquid separation function management of other devices. These will not be described in detail here. This application mainly focuses on the application of the gas-liquid separation device 10 in the thermal management system 40 to give a detailed description of the gas-liquid separation device 10 of this application.
[0017] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, Figure 1 This is a schematic diagram of the structure of an embodiment of the thermal management system of this application; Figure 2 This is an exploded schematic diagram of an embodiment of the gas-liquid separation device of this application; Figure 3 Figure 1 Schematic diagram of the assembly structure of the gas-liquid separation unit; Figure 4 yes Figure 3 A schematic diagram of the gas-liquid separation device from direction A; Figure 5 This is a schematic diagram of the gas-liquid separation device of this application along section B; Figure 6 This is a schematic diagram of the gas-liquid separation device of this application along the C-direction; Figure 7This is a schematic cross-sectional view of the gas-liquid separation device of this application along the D direction. The gas-liquid separation device 10 includes: an end cap assembly 100 and a gas-liquid separation assembly 200. The gas-liquid separation assembly 200 includes a accommodating cavity 210, a gas-liquid separation section 220, and a bypass section 230.
[0018] The end cap assembly 100 is provided with a first channel 111 and a second channel 112 that is spaced apart from the first channel 111.
[0019] The top of the accommodating cavity 210 has an opening communicating with its accommodating cavity 211, and the end cap assembly 100 covers the opening. A gas-liquid separation section 220 is disposed within the accommodating cavity 211; a bypass section 230 is disposed within the accommodating cavity 211 and extends from the opening to the bottom of the accommodating cavity 211, communicating with the first channel 111 and the accommodating cavity 211; wherein, the bottom of the accommodating cavity 211 refers to the position of the refrigerant when it is stationary under gravity. The end cap assembly 100 is configured to guide the first refrigerant to the gas-liquid separation section 220 along the second channel 112, and selectively guide the second refrigerant to the bottom of the accommodating cavity 211 along the first channel 111 and the bypass section 230, so as to at least heat the refrigerant at the bottom of the accommodating cavity 211; wherein, the temperature of the second refrigerant is higher than that of the refrigerant at the bottom of the accommodating cavity 211.
[0020] Specifically, in this embodiment, the gas-liquid separation device 10 is connected to the compressor 20 and the heat circulation pipeline 30 in the thermal management system 40 via the end cap assembly 100. The compressor 20 processes the refrigerant separated by the gas-liquid separation device 10, converting it into a higher-temperature compressed refrigerant. The compressor 20 then diverts the compressed refrigerant to the heat circulation pipeline 30 and the end cap assembly 100. The compressed refrigerant diverted to the heat circulation pipeline 30 is converted into a lower-temperature refrigerant (the first refrigerant mentioned above) after heat exchange and flows back to the end cap assembly 100. The end cap assembly 100 further guides the first refrigerant to the gas-liquid separation section 220 within the accommodating cavity 210 for gas-liquid separation. Another portion of the compressed refrigerant diverted from the compressor 20 is directly guided to the end cap assembly 100 as the second refrigerant. The end cap assembly 100 selectively guides this portion of the compressed refrigerant (the second refrigerant) along the first channel 111 to… The bypass section 230 allows the second refrigerant to flow to the bottom of the receiving cavity 211, enabling the high-temperature second refrigerant to exchange heat with the refrigerant in the receiving cavity 211, especially the refrigerant at the bottom of the receiving cavity 211. For example, when the gas-liquid separator 10 is in an ultra-low temperature condition, most of the refrigerant in the receiving cavity 211 remains stationary at the bottom of the receiving cavity 211 due to the low temperature or other reasons, causing a sharp drop in the refrigerant pressure in the receiving cavity 211. In response to the gas-liquid separator 10 being in an ultra-low temperature condition, the end cap assembly 100 uses the compressed refrigerant diverted from the compressor 20 as the second refrigerant and guides it along the first channel 111 to the bypass section 230, so that the high-temperature second refrigerant heats the refrigerant at the bottom of the receiving cavity 211, thereby increasing the evaporation rate of the refrigerant in the receiving cavity 211, effectively increasing the refrigerant pressure in the receiving cavity 211, and thus effectively increasing the flow rate of the compressor 20, thereby effectively increasing the heating capacity of the thermal management system 40. In this embodiment, the first refrigerant is separated into gas and liquid in the gas-liquid separation section 220 and then becomes part of the refrigerant in the accommodating cavity 211. The second refrigerant does not go through the working cycle. For example, in this embodiment, the second refrigerant does not flow through the heat circulation pipe 30 in the heat management system 40. Therefore, the second refrigerant is directly guided to the bottom of the accommodating cavity 211 in a high-temperature form through the bypass section 230 to heat the refrigerant in the accommodating cavity 211 while also becoming part of the refrigerant in the accommodating cavity 211.
[0021] Optionally, in some embodiments, the refrigerant in the accommodating cavity 211 is also mixed with a mixture of lubricating substances from the compressor 20. Under ultra-low temperature conditions, the miscibility between the refrigerant and the lubricating substances decreases, causing them to separate and resulting in difficulty in oil return from the compressor 20. Based on the above configuration, the gas-liquid separation device 10 can guide the high-temperature second refrigerant along the bypass portion 230 to the bottom of the accommodating cavity 211 through the end cap assembly 100, thereby increasing the temperature of the refrigerant in the accommodating cavity 211. This effectively increases the miscibility between the refrigerant and the lubricating substances in the accommodating cavity 211, thereby effectively improving the oil return efficiency of the compressor 20 and ensuring the normal and stable operation of the thermal management system 40.
[0022] In this embodiment, when the gas-liquid separation device 10 is in a suitable temperature condition, the refrigerant in the accommodating cavity 211 does not need to be heated by the second refrigerant to ensure the normal flow of the thermal management system 40 and the normal oil return of the compressor 20. At this time, the first channel 111 in the end cap assembly 100 is not open. Based on this, the flow of the refrigerant in the thermal management system 40 can be effectively ensured when the temperature is suitable, and the heating capacity of the thermal management system 40 can be effectively improved.
[0023] Alternatively, in other embodiments, the second refrigerant may also be generated and conducted to the end cap assembly 100 by other components, which will not be described in detail here.
[0024] Unlike existing technologies, the gas-liquid separation device 10 of this application includes an end cap assembly 100 and a gas-liquid separation assembly 200. The end cap assembly 100 is provided with a first channel 111 and a second channel 112. The gas-liquid separation assembly 200 includes a bypass portion 230, a gas-liquid separation portion 220, and a receiving cavity 210. The end cap assembly 100 is configured to guide a first refrigerant to the gas-liquid separation portion 220 along the second channel 112, and selectively guide a second refrigerant to the bottom of the receiving cavity 211 along the first channel 111 and the bypass portion 230, so as to heat at least the refrigerant at the bottom of the receiving cavity 211. In the above manner, when the gas-liquid separator 10 is in an ultra-low temperature condition, the gas-liquid separator 10 can guide the second refrigerant to the bottom of the accommodating cavity 211 through the end cap assembly 100 and the bypass part 230, thereby increasing the evaporation rate of the refrigerant in the accommodating cavity 211, effectively increasing the refrigerant pressure in the accommodating cavity 211, and thus effectively increasing the flow rate of the thermal management system 40. When the gas-liquid separator 10 is in a suitable temperature condition, the gas-liquid separator 10 can de-circulate the second channel 112 in the end cap assembly 100, thereby effectively ensuring the refrigerant flow rate of the thermal management system 40. Based on the above method, the refrigerant flow rate of the thermal management system 40 under any temperature condition can be effectively increased, thereby effectively increasing the heating capacity of the thermal management system 40 under various temperature conditions and improving the environmental adaptability of the thermal management system 40.
[0025] Optionally, see further. Figure 7 The bypass section 230 includes a reinforcing section 232 and a conduit section 231 fixedly connected to the reinforcing section 232; the accommodating cavity 210 includes a cylindrical body, the inner wall of the cylindrical body forming an accommodating cavity 211, one end of the cylindrical body having an opening, the reinforcing section 232 being connected to the inner wall of the cylindrical body and extending radially along the cylindrical body, and the axial direction of the conduit section 231 being parallel to the axial direction of the cylindrical body.
[0026] Specifically, in this embodiment, the accommodating cavity 210 is a cylindrical body, wherein the inner wall of the cylinder forms the aforementioned accommodating cavity 211. The conduit section 231 is the main structural part of the bypass section 230 used for guiding the second refrigerant. The conduit section 231 is provided with a flow channel (not shown in the figure) inside. One end of the conduit section 231 is connected to the end cap assembly 100, and the flow channel inside the conduit section 231 communicates with the first channel 111 for guiding the second refrigerant. The axial direction of the conduit section 231 is parallel to the axial direction of the cylinder. Based on this arrangement, when the second refrigerant flows along the axial direction of the conduit section 231 to the bottom of the accommodating cavity 211, the second refrigerant can also transfer heat to the refrigerant along the way through the conduit section 231, thereby further increasing the evaporation rate of the refrigerant in the accommodating cavity 211, and further increasing the heating capacity of the thermal management system 40. The bypass section 230 also includes a reinforcing section 232, which provides a fixed connection between the conduit section 231 and the cylinder along the radial direction of the cylinder. While the conduit section 231 is connected to the end cap assembly 100 along its axial direction, it is also connected and fixed to the cylinder along its radial direction through the reinforcing section 232, which effectively improves the stability of the conduit section 231 and prevents the conduit section 231 from shaking or falling off due to the kinetic energy of the second refrigerant, thereby effectively improving the working stability of the gas-liquid separator 10.
[0027] Optionally, the bypass portion 230 further includes a heat dissipation portion 233, which is connected to the outer peripheral side of the conduit portion 231 and extends in a direction away from the reinforcing portion 232. Specifically, in this embodiment, the heat dissipation portion 233 is disposed on the side of the conduit portion 231 away from the reinforcing portion 232, and is connected to the conduit portion 231 to diffuse the heat of the second refrigerant in the conduit portion 231 into the receiving cavity 211, thereby effectively increasing the evaporation rate of the refrigerant in the receiving cavity 211. In this embodiment, both the heat dissipation portion 233 and the reinforcing portion 232 are configured as rib-turn structures, which can effectively improve the heat transfer efficiency of the heat dissipation portion 233 and the reinforcing portion 232, thereby effectively increasing the evaporation rate of the refrigerant in the receiving cavity 211.
[0028] Optionally, the cylinder and the bypass section 230 can be manufactured by an integral molding process, that is, the cylinder and the bypass section 230 are an integral part. The bypass section 230 is formed by the radial extension and deformation of part of the inner wall of the cylinder. Based on this, the manufacturing efficiency of the gas-liquid separation device 10 can be effectively improved, thereby effectively reducing the manufacturing cost of the gas-liquid separation device 10.
[0029] Optionally, see Figure 2 and Figure 7 The gas-liquid separation assembly 200 further includes a buffer 240, which is disposed at the end of the conduit section 231 opposite to the opening. Specifically, the buffer 240 is disposed at the end of the conduit section 231 opposite to the opening of the receiving cavity 211, that is, at the end of the conduit section 231 near the bottom of the receiving cavity 211. By disposing of the buffer 240 at the end of the conduit section 231 opposite to the opening, the kinetic energy of the second refrigerant flowing out of the conduit section 231 can be effectively reduced, thereby effectively preventing the refrigerant at the bottom of the receiving cavity 211 from boiling due to excessive kinetic energy.
[0030] Optionally, see Figure 7 and further Figure 8 , Figure 8 yes Figure 2 A schematic diagram of the structure of the buffer member 240. An ear loop portion 234 is provided at one end of the conduit portion 231 near the bottom of the receiving cavity 211. The buffer member 240 includes a buffer body 248 and an ear fastener portion 244 disposed on the buffer body 248. The ear fastener portion 244 is fastened to the ear loop portion 234 to fix the buffer member 240 to the conduit portion 231. The buffer body 248 is used to reduce the flow rate of the first refrigerant. Specifically, in this embodiment, the reinforcing portion 232 and the heat dissipation portion 233 extend axially along the conduit portion 231, and the ends of the reinforcing portion 232 and the heat dissipation portion 233 near the bottom of the receiving cavity 211 are deformed to form two ear loop portions 234. The buffer member 240 is provided with an ear fastener portion 244 connected to the buffer body 248. Optionally, the ear loop portion 234 can be an elastic ear fastener, and the ear fastener portion 244 can be fastened to the ear loop portion 234 to fix the buffer member 240 to the conduit portion 231. After the buffer 240 is fixedly connected to the conduit 231, the buffer body 248 is connected to the flow channel in the conduit 231 and buffers the second refrigerant to effectively reduce the kinetic energy of the second refrigerant.
[0031] Optionally, see Figure 8The buffer body 248 includes a buffer cavity 245, a top buffer part 246, a side buffer part 247, and a bottom buffer part 249 connected to the side buffer part 247. An ear loop part 244 is provided at one end of the side buffer part 247 away from the bottom buffer part 249. The top buffer part 246, the side buffer part 247, and the bottom buffer part 249 surround and form the buffer cavity 245. Specifically, in this embodiment, the buffer body 248 includes a top wall 241, a bottom wall 243, and a side wall 242. The top wall 241 and the bottom wall 243 are parallel to each other and spaced apart along the axial direction of the guide tube 231. The side wall 242 is disposed between the top wall 241 and the bottom wall 243 and is connected to the top wall 241 and the bottom wall 243 respectively. The top wall 241 is provided with a grid opening as a side buffer part 247 of the buffer body 248. The bottom wall 243 is provided with a grid opening to form a bottom buffer part 249. The side wall 242 is provided with a grid opening to form a side buffer part 247. The top wall 241 is provided with multiple through holes to form the bottom buffer part 249. The top wall 241, bottom wall 243, and side wall 242, based on their positional relationship, enclose the aforementioned buffer cavity 245. The second refrigerant, after being buffered by the top buffer portion 246, enters the buffer cavity 245 and further flows out along the grid openings of the bottom wall 243 and side wall 242 to the bottom of the receiving cavity 211. This effectively reduces the kinetic energy of the second refrigerant. In other embodiments, the top buffer portion 246, side buffer portion 247, bottom buffer portion 249, and buffer cavity 245 can be implemented with other structural forms, which will not be described in detail here.
[0032] Optionally, the gas-liquid separation assembly 200 further includes a bottom cover 260, and a bottom opening is provided at one end of the cylinder opposite to the end cover assembly 100. The bottom cover 260 is placed over the bottom opening to form the aforementioned receiving cavity 211 with the side wall of the cylinder, wherein the bottom cover 260 serves as the bottom of the receiving cavity 211. In this embodiment, the receiving cavity 210 is formed after the bottom cover 260 is spliced with the cylinder. This arrangement effectively reduces the difficulty of setting the buffer 240 near the bottom of the receiving cavity 211 in the bypass portion 230, thereby effectively improving the assembly efficiency of the gas-liquid separation assembly 200 and reducing the manufacturing cost of the gas-liquid separation assembly 200.
[0033] Optionally, see Figure 5 The first channel 111 includes a main channel 1111 and a branch channel 1114. The main channel 1111 and the branch channel 1114 are selectively connected. The branch channel 1114 is connected to the bypass section 230. The main channel 1111 is used to input the second refrigerant.
[0034] Specifically, the first channel 111 on the end cap assembly 100 includes a main channel 1111 and a branch channel 1114. The end cap assembly 100 can connect the main channel 1111 and the branch channel 1114 when needed. For example, when the gas-liquid separation assembly 200 is in an ultra-low temperature condition, the end cap assembly 100 can connect the main channel 1111 and the branch channel 1114, so that the second refrigerant can enter the bottom of the accommodating cavity 211 along the first channel 111 and the bypass portion 230, thereby increasing the evaporation rate of the refrigerant in the accommodating cavity 211.
[0035] Optionally, the end cap assembly 100 includes: an end cap body 110 and a bypass valve 120, wherein the end cap body 110 includes a valve seat portion 110a and a connecting portion 110b disposed opposite to the valve seat portion 110a, a main channel 1111 and a branch channel 1114 are disposed in the valve seat portion 110a, a second channel 112 is disposed in the connecting portion 110b, the end cap body 110 is detachably connected to the opening, the valve seat portion 110a is also provided with a mounting hole 113, the mounting hole 113 communicates with the main channel 1111 and the branch channel 1114; the bypass valve 120 is disposed in the mounting hole 113, the bypass valve 120 is used to selectively control the communication between the main channel 1111 and the branch channel 1114, so that the second refrigerant is introduced into the bypass portion 230 and the receiving cavity 211.
[0036] Specifically, the side wall of the opening of the accommodating cavity 210 is provided with a connection structure corresponding to the connecting part 110b, such as a threaded attachment. The end cap body 110 is connected to the accommodating cavity 210 through the connecting part 110b, so that the end cap body 110 covers the opening of the accommodating cavity 210. The end cap body 110 is an integrally formed structure, and a valve seat part 110a is provided on the end cap body 110. The main channel 1111 and the branch channel 1114 are provided on the valve seat part 110a. The valve seat part 110a is also provided with a mounting hole 113 communicating with the main channel 1111 and the branch channel 1114. A bypass valve 120 is provided in the mounting hole 113. The bypass valve 120 selectively connects the main channel 1111 and the branch channel 1114 to allow the second refrigerant to be introduced into the bypass part 230 and the accommodating cavity 211.
[0037] Optionally, the gas-liquid separation section 220 is disposed at the top of the accommodating cavity 211, and the end cap body 110 is disposed on the side of the gas-liquid separation section 220 away from the bottom of the accommodating cavity 211, forming a gas-liquid separation cavity 212. The bypass section 230 penetrates the gas-liquid separation cavity 212 to the bottom of the accommodating cavity 211. The branch channel 1114 includes a first branch sub-channel 1113 and a second branch sub-channel 1112. The first branch sub-channel 1113 is connected to the bypass section 230 and is used to guide part of the second refrigerant to the bottom of the accommodating cavity 211. The second branch sub-channel 1112 is connected to the gas-liquid separation cavity 212 and is used to guide another part of the second refrigerant to the gas-liquid separation cavity 212.
[0038] Specifically, in this embodiment, the end cap body 110 is disposed over the opening of the accommodating cavity 211, and the end cap body 110 and the gas-liquid separation part 220 are disposed at a distance from each other, forming a gas-liquid separation cavity 212 in the accommodating cavity 211. It is worth noting that the gas-liquid separation cavity 212 is part of the accommodating cavity 211. The first channel 111 is connected to the gas-liquid separation cavity 212. The first refrigerant flows into the gas-liquid separation cavity 212 along the first channel 111 and collides with the gas-liquid separation part 220 to achieve gas-liquid separation. The branch channel 1114 includes a first branch sub-channel 1113 and a second branch sub-channel 1112. The bypass portion 230 passes through the gas-liquid separation portion 220, with one end extending to the gas-liquid separation chamber 212 and communicating with the first branch sub-channel 1113, and the other end extending to the bottom of the receiving chamber 211. For example, in this embodiment, one end of the conduit portion 231 in the bypass portion 230 extends to the gas-liquid separation chamber 212 and communicates with the first branch sub-channel 1113, and the other end of the conduit portion 231 passes through the gas-liquid separation portion 220 and extends to the bottom of the receiving chamber 211. Furthermore, the second branch sub-channel 1112 in the branch channel 1114 is connected to the gas-liquid separation chamber 212. The bypass valve 120 can connect the main channel 1111 to both the first branch sub-channel 1113 and the second branch sub-channel 1112. A portion of the second refrigerant is guided along the first branch sub-channel 1113 and the bypass section 230 to the bottom of the receiving chamber 211, thereby effectively increasing the evaporation rate of the refrigerant in the portion of the receiving chamber 211 away from the gas-liquid separation chamber 212. Another portion of the second refrigerant is guided along the second branch sub-channel 1112 to the gas-liquid separation chamber 212, thereby increasing the evaporation rate of the refrigerant in the gas-liquid separation chamber 212. Based on the above method, the evaporation rate of the refrigerant in the receiving chamber 211 can be effectively increased, thereby effectively increasing the heating capacity of the thermal management system 40.
[0039] Optionally, see Figure 4 , Figure 5 , Figure 6 and Figure 7 The end cap body 110 is also provided with a third channel 114. The gas-liquid separation device 10 also includes an outlet pipe assembly 250. The outlet pipe assembly 250 is disposed in the accommodating cavity 211. The outlet pipe assembly 250 is provided with an inlet 256 and an outlet. The outlet is connected to the third channel 114. The inlet 256 is located on the side of the gas-liquid separation section 220 opposite to the outlet. The outlet pipe assembly 250 is used to guide the refrigerant in the accommodating cavity 211 and after gas-liquid separation out of the accommodating cavity 211.
[0040] Specifically, in this embodiment, the vent pipe assembly 250 is disposed in the accommodating cavity 211, wherein the vent outlet on the vent pipe assembly 250 is connected to the third channel 114, and the vent inlet 256 is located on the side of the gas-liquid separation section 220 away from the opening of the accommodating cavity 211, that is, the vent inlet 256 is located on the side of the gas-liquid separation section 220 away from the end cap assembly 100. Based on the above arrangement, the vent pipe assembly 250 can ensure that the refrigerant discharged through the vent pipe assembly 250 is refrigerant after gas-liquid separation, thereby effectively improving the working stability of the thermal management system 40.
[0041] Optionally, the outlet pipe assembly 250 is provided with an outlet channel 254, a conversion channel 255 and an inlet channel 253. The conversion channel 255 is located at one end of the outlet pipe assembly 250 near the bottom of the receiving cavity 211 and is connected to the receiving cavity 211. One end of the inlet channel 253 is connected to the inlet port 256 and the other end of the inlet channel 253 is connected to the conversion channel 255. One end of the outlet channel 254 is connected to the outlet and the other end of the outlet channel 254 is connected to the conversion channel 255. The refrigerant after gas-liquid separation flows sequentially through the inlet channel 253, the conversion channel 255 and the outlet channel 254.
[0042] Specifically, the vent pipe assembly 250 includes a small-diameter portion 251 and a large-diameter portion 252 surrounding the outer periphery of the small-diameter portion 251. A portion of the small-diameter portion 251 passes through the gas-liquid separation section 220 and extends to connect with the third channel 114 on the end cap assembly 100. Another portion of the small-diameter portion 251 passes through the gas-liquid separation section 220 and extends to the bottom of the receiving cavity 211. The large-diameter portion 252 is located on the side of the gas-liquid separation section 220 away from the end cap assembly 100, and its large-diameter portion surrounds the outer periphery of the small-diameter portion 251 and connects to it. The vent passage 254 is disposed within the small-diameter portion 251. The outer wall of the small-diameter portion 251 and the inner wall of the large-diameter portion 252 form an inlet passage 253. A conversion passage 255 is located at one end of the small-diameter portion 251 near the bottom of the receiving cavity 211 and communicates with the inlet passage 253, the vent passage 254, and the receiving cavity 211, respectively. Based on the above configuration, the refrigerant after gas-liquid separation flows into the intake channel 253 through the intake port 256. The intake channel 253 guides the refrigerant to the conversion channel 255 so that the refrigerant can combine with the lubricating material at the bottom of the accommodating cavity 211 and then flow out of the accommodating cavity 211 along the outlet channel 254, thereby promoting the circulation of the lubricating material in the thermal management system 40 and improving the working stability of the thermal management system 40.
[0043] Optionally, in this embodiment, the gas-liquid separation section 220 is configured as an umbrella-like cap, wherein the gas-liquid separation section 220 includes a central part and a brim connected to the central part. The brim of the gas-liquid separation section 220 extends and curves toward the bottom of the receiving cavity 211. Based on this configuration, after the end cap assembly 100 guides the first refrigerant to the gas-liquid separation cavity 212 between the gas-liquid separation section 220 and the end cap assembly 100, the first refrigerant impacts the central part to achieve gas-liquid separation. Furthermore, the gas-liquid separation section 220 is provided with a first through hole (not shown) and a second through hole (not shown). The bypass section 230 and the vent pipe assembly 250 pass through the first through hole and the second through hole, respectively. In this embodiment, the bypass section 230 and the first through hole are in an interference fit, and the vent pipe assembly 250 and the second through hole are in an interference fit. Based on this, the gas-liquid separation section 220 is fixed in the accommodating cavity 211, and the gas-liquid separation section 220 and the end cap assembly 100 are kept in a fixed relative position along the axial direction of the accommodating cavity 210.
[0044] This application also proposes a thermal management system 40, wherein the thermal management system 40 includes the gas-liquid separation device 10 of any of the above embodiments, the thermal management system 40 further includes a compressor 20 and a thermal circulation pipeline 30, wherein the compressor 20 is provided with an inlet branch 21 and a first outlet branch 22, the inlet branch 21 is connected to the gas-liquid separation device 10 for receiving the refrigerant after gas-liquid separation, the first outlet branch 22 is connected to one end of the thermal circulation pipeline 30, and the other end of the thermal circulation pipeline 30 is connected to a second channel 112, wherein the compressor 20 is used to convert the refrigerant after gas-liquid separation into compressed refrigerant, and the compressed refrigerant flows through the thermal circulation pipeline 30 and undergoes heat exchange before being converted into the first refrigerant.
[0045] Optionally, in this embodiment, the second refrigerant is a compressed refrigerant, and the compressor 20 is further provided with a second outlet branch 23, which is connected to the first channel 111. In this embodiment, as described above, the second refrigerant is the compressed refrigerant output by the compressor 20. That is, the compressor 20 outputs the high-temperature second refrigerant to the second channel 112 through the second outlet branch 23, so that the gas-liquid separation device 10 can introduce the second refrigerant into the bottom of the accommodating cavity 211 under ultra-low temperature conditions, thereby heating the refrigerant in the accommodating cavity 211, thereby effectively increasing the evaporation rate of the refrigerant in the accommodating cavity 211, and thus increasing the refrigerant flow rate of the thermal management system 40, thereby effectively increasing the heating capacity of the heat pipe system under ultra-low temperature conditions.
[0046] In summary, the gas-liquid separation device 10 of this application includes an end cap assembly 100 and a gas-liquid separation assembly 200. The end cap assembly 100 is provided with a first channel 111 and a second channel 112. The gas-liquid separation assembly 200 includes a bypass portion 230, a gas-liquid separation portion 220, and a receiving cavity 210. The end cap assembly 100 is configured to guide a first refrigerant to the gas-liquid separation portion 220 along the second channel 112, and selectively guide a second refrigerant to the bottom of the receiving cavity 211 along the first channel 111 and the bypass portion 230, so as to heat at least the refrigerant at the bottom of the receiving cavity 211. In the above manner, when the gas-liquid separator 10 is in an ultra-low temperature condition, the gas-liquid separator 10 can guide the second refrigerant to the bottom of the accommodating cavity 211 through the end cap assembly 100 and the bypass part 230, thereby increasing the evaporation rate of the refrigerant in the accommodating cavity 211, effectively increasing the refrigerant pressure in the accommodating cavity 211, and thus effectively increasing the flow rate of the thermal management system 40. When the gas-liquid separator 10 is in a suitable temperature condition, the gas-liquid separator 10 can de-circulate the second channel 112 in the end cap assembly 100, thereby effectively ensuring the refrigerant flow rate of the thermal management system 40. Based on the above method, the refrigerant flow rate of the thermal management system 40 under any temperature condition can be effectively increased, thereby effectively increasing the heating capacity of the thermal management system 40 under various temperature conditions and improving the environmental adaptability of the thermal management system 40.
[0047] It is worth noting that the accompanying drawings are only for illustrating the structural and connection relationships of the product of this invention, and do not limit the specific structural dimensions of the product of this invention. The above descriptions are merely embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.
Claims
1. A gas-liquid separation device, characterized in that, include: The end cap assembly is provided with a first channel and a second channel that is spaced apart from the first channel; Gas-liquid separation assembly, including: The accommodating cavity has an opening at its top that communicates with the accommodating cavity, and the end cap assembly covers the opening; A gas-liquid separation unit is disposed within the accommodating cavity; A bypass portion is disposed within the receiving cavity and extends from the opening to the bottom of the receiving cavity; the bypass portion communicates with the first channel and the receiving cavity. The end cap assembly is configured to guide a first refrigerant to the gas-liquid separation section along the second channel, and selectively guide a second refrigerant to the bottom of the receiving cavity along the first channel and the bypass section, so as to heat at least the refrigerant at the bottom of the receiving cavity; wherein the temperature of the second refrigerant is higher than that of the refrigerant at the bottom of the receiving cavity. The bypass section includes a reinforcing section and a conduit section fixedly connected to the reinforcing section; A buffer is disposed at the end of the conduit portion opposite to the opening.
2. The gas-liquid separation device according to claim 1, characterized in that, The accommodating cavity includes: The cylindrical body has an inner wall that forms the accommodating cavity. One end of the cylindrical body has an opening. The reinforcing part is connected to the inner wall of the cylindrical body and extends radially along the cylindrical body. The axial direction of the guide tube is parallel to the axial direction of the cylindrical body.
3. The gas-liquid separation device according to claim 1, characterized in that, An ear loop is provided at one end of the conduit near the bottom of the accommodating cavity. The buffer includes a buffer body and an ear clip provided on the buffer body. The ear clip is fastened to the ear loop to fix the buffer to the conduit. The buffer body is used to reduce the flow rate of the second refrigerant.
4. The gas-liquid separation device according to claim 3, characterized in that, The buffer body includes a buffer cavity, a top buffer portion, a side buffer portion, and a bottom buffer portion connected to the side buffer portion. The ear-shaped part is provided at one end of the side buffer portion away from the bottom buffer portion. The top buffer portion, the side buffer portion, and the bottom buffer portion surround and form the buffer cavity.
5. The gas-liquid separation device according to claim 2, characterized in that, The bypass portion further includes a heat dissipation portion, which is connected to the outer peripheral side of the conduit portion and extends in a direction away from the reinforcing portion.
6. The gas-liquid separation device according to claim 1, characterized in that, The first channel includes a main channel and a branch channel. The main channel and the branch channel are selectively connected. The branch channel is connected to the bypass section. The main channel is used to input the second refrigerant.
7. The gas-liquid separation device according to claim 6, characterized in that, The end cap assembly includes: The end cap body includes a valve seat portion and a connecting portion disposed opposite to the valve seat portion. The main channel and the branch channel are disposed in the valve seat portion, and the second channel is disposed in the connecting portion. The end cap body is detachably connected to the opening. The valve seat portion is also provided with a mounting hole, which communicates with the main channel and the branch channel. A bypass valve is disposed in the mounting hole. The bypass valve is used to selectively control the connection between the main channel and the branch channel so that the second refrigerant is introduced into the bypass section and the accommodating cavity.
8. The gas-liquid separation device according to claim 7, characterized in that, The gas-liquid separation section is disposed at the top of the accommodating cavity, and the end cap body is disposed on the side of the gas-liquid separation section away from the bottom of the accommodating cavity, forming a gas-liquid separation cavity. The bypass section penetrates the gas-liquid separation cavity to the bottom of the accommodating cavity. The branch channel includes a first branch sub-channel and a second branch sub-channel. The first branch sub-channel is connected to the bypass section and is used to guide a portion of the second refrigerant to the bottom of the accommodating cavity. The second branch sub-channel is connected to the gas-liquid separation cavity and is used to guide another portion of the second refrigerant to the gas-liquid separation cavity.
9. The gas-liquid separation device according to claim 7, characterized in that, The end cap body is also provided with a third channel, and the gas-liquid separation device further includes: An air outlet assembly is disposed within the accommodating cavity. The air outlet assembly is provided with an air inlet and an air outlet. The air outlet is connected to the third channel. The air inlet is located on the side of the gas-liquid separation section opposite to the opening. The air outlet assembly is used to guide the refrigerant after gas-liquid separation out of the accommodating cavity.
10. The gas-liquid separation device according to claim 9, characterized in that, The air outlet pipe assembly is provided with an air outlet channel, a conversion channel, and an air inlet channel. The conversion channel is located at one end of the air outlet pipe assembly near the bottom of the accommodating cavity and is connected to the accommodating cavity. One end of the air inlet channel is connected to the air inlet, and the other end of the air inlet channel is connected to the conversion channel. One end of the air outlet channel is connected to the air outlet, and the other end of the air outlet channel is connected to the conversion channel. The refrigerant after gas-liquid separation flows sequentially through the air inlet channel, the conversion channel, and the air outlet channel.
11. A thermal management system, characterized in that, The thermal management system includes the gas-liquid separation device according to any one of claims 1 to 10, further comprising a compressor and a thermal circulation pipeline, and is provided with an inlet branch and a first outlet branch. The inlet branch is connected to the gas-liquid separation device and is used to receive the refrigerant after gas-liquid separation. The first outlet branch is connected to one end of the thermal circulation pipeline, and the other end of the thermal circulation pipeline is connected to the second channel. The compressor is used to convert the gas-liquid separated refrigerant into compressed refrigerant. The compressed refrigerant flows through the thermal circulation pipeline and undergoes heat exchange before being converted into the first refrigerant.
12. The thermal management system according to claim 11, characterized in that, The second refrigerant is the compressed refrigerant, and the compressor is also provided with a second outlet branch, which is connected to the first channel.