A one-way valve and pipeline for a new energy vehicle thermal management system

Abstract

The application discloses a one-way valve and a pipeline for a new energy automobile thermal management system, and relates to the technical field of valves.The one-way valve comprises a valve body provided with a valve cavity, the valve cavity being provided with a flow inlet and a flow outlet; a flow guide piece installed in the valve cavity and matched with the valve cavity, located at one end of the valve cavity away from the flow inlet, and provided with a flow guide hole in the middle part; and a valve core installed in the valve cavity, located between the flow inlet and the flow guide piece, capable of sliding along the axial direction of the valve body, and provided with a flow gap between the flow guide piece and the side wall of the valve cavity when abutting against the flow guide piece; wherein, in the case of normal flow of fluid, the fluid pushes the valve core to move towards the flow guide piece, and in the case of reverse flow of fluid, the fluid flows from the flow guide hole to the middle part of the valve core to push the valve core to seal the flow inlet, so that the one-way valve has the characteristics of simple structure, low opening pressure and easy control of internal leakage, and meets the use requirements of the antifreeze circuit of the new energy automobile thermal management system.The pipeline is provided with the aforementioned one-way valve.

Description

Technical Field

[0001] The present invention relates to the field of valve technology, and in particular to a one-way valve and a pipeline used in a thermal management system of a new energy vehicle. Background Art

[0002] Currently, the thermal management system for new energy vehicles primarily consists of a kettle, a flow channel plate assembly, a heat exchanger assembly, a water pump, a multi-way water valve, and a check valve. Coolant enters the kettle through the flow channel outlet and then re-enters the flow channel for a circuit cycle. Simultaneously, the coolant exchanges heat with internal and external loop fluids or refrigerants through the heat exchanger, regulating the system's temperature. The check valve primarily prevents coolant backflow.

[0003] Among them, the existing one-way valve can be divided into three structural principles based on the reverse flow locking principle: 1. Spring-assisted rebound locking; 2. Elastic diaphragm rebound locking; 3. Steel ball gravity fall + reverse pressure locking; specifically:

[0004] The advantage of the spring-assisted rebound locking structure is that the valve body structure is lightweight and does not even require a valve housing (the mating end housing is the housing), and the material cost is low. The disadvantage is that the spring is prone to getting stuck and unable to reset due to up and down rebound. In addition, the return spring is a metal elastic part, and its life decreases with the increase of usage time, eventually leading to large internal leakage. At the same time, there are certain requirements for the opening pressure, and it is difficult to balance the service life and opening pressure. It is not suitable for the circulation loop of antifreeze.

[0005] The elastic diaphragm rebound locking structure has the advantages of simple structure (simpler than the spring-assisted structure), small overall size, and lower material cost. The disadvantages are that it requires a larger opening pressure, has relatively high requirements for the material selection of the diaphragm, and the internal leakage rate is difficult to control. It is also not suitable for antifreeze systems (the normal operating pressure of the antifreeze system is lower than 150KPaG), so its usage scenarios are relatively limited.

[0006] The advantage of the steel ball gravity return + reverse pressure locking is that the valve core structure only has a steel ball, which is simpler than the diaphragm structure, easier to select, and has lower material costs. The structure of the entire valve body is simple. The disadvantage is that although the internal leakage is better than the diaphragm sealing structure, it is worse than the spring rebound locking structure. In addition, the valve core is only a steel ball, and the pressure requirement for the reverse seal is relatively high. Otherwise, the steel ball will move in the valve body cavity, resulting in high internal leakage. In addition, there are strict requirements on the installation direction, and it is not suitable for occasions where there are no restrictions on the direction.

[0007] In summary, the existing one-way valve structure is not suitable for the antifreeze circuit of the thermal management system of new energy vehicles. Summary of the Invention

[0008] In response to the technical problem that the existing one-way valve structure is not suitable for the antifreeze fluid circuit of the thermal management system of new energy vehicles, the present invention provides a one-way valve and pipeline for the thermal management system of new energy vehicles. It does not require spring locking and can provide sufficient reverse pressure. It has the characteristics of simple structure, low opening pressure and easy control of internal leakage, which meets the use requirements of the antifreeze fluid circuit of the thermal management system of new energy vehicles.

[0009] The present invention is achieved through the following technical solutions:

[0010] In the first aspect, the present invention provides a one-way valve for a thermal management system of a new energy vehicle, comprising: a valve body, provided with a valve cavity, with an inlet and an outlet at both ends, the inlet and the outlet being connected to the valve cavity; a guide member, installed in the valve cavity, adapted to the valve cavity, located at one end of the valve cavity away from the inlet, and provided with a guide hole in the middle; a valve core, installed in the valve cavity, located between the inlet and the guide member, capable of sliding along the axial direction of the valve body, and when it is against the guide member, there is a flow gap between the valve core and the guide member and the side wall of the valve cavity; wherein, when the fluid flows in the forward direction, the fluid pushes the valve core to move toward the guide member, and when the fluid flows in the reverse direction, the fluid flows from the guide hole to the middle of the valve core to push the valve core to seal the inlet.

[0011] The one-way valve provided by the present invention includes a valve body, a guide member and a valve core. The valve body is provided with a valve cavity, an inlet and an outlet. The guide member is installed in the valve cavity, located at the end of the valve cavity away from the inlet, and a guide hole is provided in the middle. The valve core is installed in the valve cavity, located between the inlet and the guide member, and can slide along the axial direction of the valve body. When the valve core and the guide member are against each other, there is a flow gap between the guide member and the side wall of the valve cavity. Therefore, when the fluid flows forward, it flows in from the fluid inlet and pushes the valve core to slide towards the guide member to achieve conduction. When the fluid flows backward, the fluid pushes the middle part of the valve core under the action of the guide member to push the valve core to seal the inlet, thereby achieving reverse cutoff and playing the role of one-way conduction.

[0012] Among them, the one-way valve provided by the present invention achieves cut-off by pushing against the reverse flow of the fluid. Compared with the spring-assisted rebound locking structure, the opening pressure requirement during forward circulation is lower than that of the spring locking structure, and can provide sufficient reverse pressure. Although the spring locking structure is not adopted, the guide hole structure can assist in accelerating the locking force during reverse flow of the liquid, making it easy to control the internal leakage rate and the closing speed fast, which can increase the closing speed of the valve core in the reverse flow state. It has a simple structure, small overall size, and lower material cost. Injection molded parts can be used to achieve multiple plastic molds, effectively saving machining costs. During forward circulation, only the valve core needs to be pushed to move, the opening pressure is low, and the valve core moves in the valve cavity. There will be no situation where the valve core moves and causes high internal leakage, and there are no requirements for the installation direction.

[0013] Therefore, the one-way valve provided by the present invention does not require spring locking and can provide sufficient reverse pressure. It has the characteristics of simple structure, low opening pressure and easy control of internal leakage, and meets the use requirements of the antifreeze fluid circuit of the thermal management system of new energy vehicles.

[0014] In an optional embodiment of the present application, a flow-increasing hole is provided on the side wall of the valve body, and the flow-increasing hole is connected to the valve cavity; when the valve core moves toward the guide member, the flow-increasing hole is connected to the inlet to increase the effective flow area when the one-way valve is turned on, thereby reducing the obstruction to the fluid.

[0015] In an optional embodiment of the present application, the diameter of the guide hole gradually decreases along the reverse flow direction of the one-way valve to ensure that the reverse flow fluid can act on the middle part of the valve core.

[0016] In an optional embodiment of the present application, a plurality of guide ribs are provided on the side wall of the guide hole, and the plurality of guide ribs are evenly distributed along the circumference of the guide hole to enhance the structural strength of the guide member while achieving uniform flow guidance.

[0017] In an optional embodiment of the present application, the side wall of the valve cavity is provided with at least one guide ridge, and the guide ridge extends along the axial direction of the valve body; the side wall of the valve core is provided with a guide groove adapted to the guide ridge to ensure the stable axial sliding of the valve body by the valve core under the push of the fluid.

[0018] In an optional embodiment of the present application, a plurality of support columns are provided on the side of the valve core facing the guide member, and the plurality of support columns are evenly distributed along the circumference of the valve core; wherein, when the valve core moves toward the guide member, the support columns abut against the guide member to ensure that there is a flow gap between the valve core and the guide member when the valve core abuts against the guide member.

[0019] In an optional embodiment of the present application, a valve cover is further included, and the valve cover is arranged at one end of the valve cavity where the outflow port is arranged, so as to facilitate the assembly of internal parts of the one-way valve.

[0020] In an optional embodiment of the present application, a plurality of limiting columns are provided on the side wall of the valve cavity, and the plurality of limiting columns are evenly distributed along the circumference of the valve cavity. The guide member is pressed between the valve cover and the limiting columns to facilitate direct fixing of the guide member through the valve cover and the limiting columns.

[0021] In an optional embodiment of the present application, the valve cover is snap-fitted to the valve body to facilitate quick connection and disassembly of the valve cover and the valve body.

[0022] In an optional embodiment of the present application, a mounting clip is provided on one side of the valve cover and a mounting hole is provided on the other side, so as to facilitate the installation and fixing of the one-way valve by the cooperation of the mounting clip and the mounting screw.

[0023] In an optional embodiment of the present application, a first sealing ring is provided at one end of the valve body where the inlet is set, and the first sealing ring is used to seal the gap between the valve body and the corresponding inflow pipe; the valve cover is provided with a second sealing ring, and the second sealing ring is used to seal the gap between the valve cover and the corresponding outflow pipe, so as to facilitate the direct installation of the one-way valve in the new energy thermal management module.

[0024] In the second aspect, the present invention provides a pipeline for a thermal management system of a new energy vehicle, comprising an inlet pipeline, an outflow pipeline and the above-mentioned one-way valve for the thermal management system of a new energy vehicle; the valve body is arranged in the outflow pipeline, and the outflow port is connected to the inner cavity of the outflow pipeline; one end of the valve body having the inflow port is inserted into the side wall of the inflow pipeline.

[0025] The pipeline for the thermal management system of a new energy vehicle provided by the present invention includes an inlet pipeline, an outflow pipeline and the above-mentioned one-way valve for the thermal management system of a new energy vehicle. The valve body is arranged in the outflow pipeline, and the outflow outlet is connected to the inner cavity of the outflow pipeline so that the main body of the one-way valve can be installed in the outflow pipeline. At the same time, one end of the valve body with an inflow inlet is inserted into the side wall of the inflow pipeline, which can connect the inflow inlet of the one-way valve with the inner cavity of the pipeline to realize the inflow of fluid, thereby reducing the installation space occupied by the one-way valve and realizing the integration of the pipeline of the thermal management system of the new energy vehicle.

[0026] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0027] 1. The one-way valve for the thermal management system of new energy vehicles provided by the present invention includes a valve body, a guide member and a valve core. The valve body is provided with a valve cavity, an inlet and an outlet. The guide member is installed in the valve cavity, located at the end of the valve cavity away from the inlet, and a guide hole is provided in the middle. The valve core is installed in the valve cavity, located between the inlet and the guide member, and can slide along the axial direction of the valve body. When the valve core and the guide member are against each other, there is a flow gap between the guide member and the side wall of the valve cavity. Therefore, when the fluid flows forward, it flows in from the fluid inlet and pushes the valve core to slide the guide member to achieve conduction. When the fluid flows reversely, the fluid pushes the middle part of the valve core under the action of the guide member to push the valve core to seal the inlet, thereby achieving reverse cutoff and playing the role of one-way conduction. Compared with the one-way valve using elastic The spring-assisted rebound locking structure has a lower opening pressure requirement during forward circulation than the spring locking structure, and can provide sufficient reverse pressure. Although the spring locking structure is not adopted, the guide hole structure can assist in accelerating the locking force during reverse flow of the liquid, making it easy to control the internal leakage rate and closing speed, which can increase the closing speed of the valve core in the countercurrent state. It has a simple structure, small overall size, and lower material cost. During forward circulation, only the valve core needs to be pushed to move, and the opening pressure is low. The valve core moves in the valve cavity, and there will be no valve core movement resulting in high internal leakage. At the same time, there are no requirements for the installation direction. It has the characteristics of simple structure, low opening pressure and easy-to-control internal leakage, which meet the use requirements of the antifreeze fluid circuit of the thermal management system of new energy vehicles.

[0028] 2. The one-way valve for the thermal management system of new energy vehicles provided by the present invention can be an injection molded part, which can realize multiple outputs from one plastic mold, thereby effectively saving machining costs.

[0029] 3. The pipeline for the thermal management system of new energy vehicles provided by the present invention includes an inlet pipeline, an outflow pipeline and the above-mentioned one-way valve for the thermal management system of new energy vehicles. The valve body is arranged in the outflow pipeline, and the outflow outlet is connected to the inner cavity of the outflow pipeline, so that the main body of the one-way valve can be installed in the outflow pipeline. At the same time, one end of the valve body with the inflow inlet is inserted into the side wall of the inflow pipeline, which can connect the inflow of the one-way valve with the inner cavity of the pipeline to realize the inflow of fluid, thereby reducing the installation space occupied by the one-way valve and realizing the integration of the pipeline of the thermal management system of new energy vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0031] In the attached figure:

[0032] Figure 1 A schematic diagram of the main structure of a one-way valve for a thermal management system of a new energy vehicle provided by an embodiment of the present invention;

[0033] Figure 2 A schematic diagram of the main cross-sectional structure of a one-way valve for a thermal management system of a new energy vehicle provided by an embodiment of the present invention;

[0034] Figure 3 A schematic diagram of the main structure of a valve body provided in an embodiment of the present invention;

[0035] Figure 4 A schematic side view of the valve body provided in an embodiment of the present invention;

[0036] Figure 5 for Figure 4 Schematic diagram of the AA surface structure;

[0037] Figure 6 A schematic diagram of the top view of the valve body provided in an embodiment of the present invention;

[0038] Figure 7 A schematic diagram of the top structure of a valve core provided in an embodiment of the present invention;

[0039] Figure 8 for Figure 7 Schematic diagram of the BB surface structure;

[0040] Figure 9 A schematic top view of the flow guide member provided in an embodiment of the present invention;

[0041] Figure 10 for Figure 9 Schematic diagram of CC surface structure;

[0042] Figure 11 A schematic diagram of the main structure of the valve cover provided in an embodiment of the present invention;

[0043] Figure 12 A schematic cross-sectional view of a valve cover according to an embodiment of the present invention;

[0044] Figure 13 A schematic diagram of the principle of forward flow of a one-way valve for a thermal management system of a new energy vehicle provided by an embodiment of the present invention;

[0045] Figure 14 A schematic diagram of the principle of reverse cutoff of a one-way valve for a thermal management system of a new energy vehicle provided by an embodiment of the present invention.

[0046] Markings and corresponding parts names in the accompanying drawings:

[0047] 10-valve body, 11-valve cavity, 12-inlet, 13-outlet, 14-flow-increasing hole, 15-guide ridge, 16-limiting column, 17-connecting hole, 18-first sealing ring;

[0048] 20- flow guide, 21- flow guide hole, 22- flow guide rib;

[0049] 30-valve core, 31-guide groove, 32-support column, 33-energy collecting groove, 34-third sealing ring;

[0050] 40-valve cover, 41-connecting buckle, 42-installing buckle, 43-installing hole, 44-second sealing ring;

[0051] 50-inflow pipe;

[0052] 60-Outflow pipe. DETAILED DESCRIPTION

[0053] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0054] In the description of the embodiments of the present application, the indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the device of the application is conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. These are merely for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present application.

[0055] In the description of this application, unless otherwise specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0056] Example 1

[0057] Combine Figure 1 and Figure 2The present embodiment provides a one-way valve for a thermal management system of a new energy vehicle, comprising: a valve body 10, provided with a valve cavity 11, with an inlet 12 and an outlet 13 at both ends, the inlet 12 and the outlet 13 being in communication with the valve cavity 11; a flow guide 20, mounted in the valve cavity 11, adapted to the valve cavity 11, located at an end of the valve cavity 11 away from the inlet 12, and having a guide hole 21 in the middle; a valve core 30, mounted in the valve cavity 11, located between the inlet 12 and the flow guide 20, capable of sliding along the axial direction of the valve body 10, and when abutting against the flow guide 20, a flow gap is formed between the flow guide 20 and the sidewall of the valve cavity 11; wherein, when the fluid flows in a forward direction, the fluid pushes the valve core 30 toward the flow guide 20, and when the fluid flows in a reverse direction, the fluid flows from the guide hole 21 to the middle of the valve core 30, thereby pushing the valve core 30 to seal the inlet 12.

[0058] It is understood that the valve body 10, as the housing of the one-way valve, can be made of plastic to facilitate multiple production from a single mold, thereby reducing the manufacturing cost of the one-way valve. For new energy vehicle thermal management systems, the medium flowing therein is antifreeze. Therefore, the valve body 10 of this application is made of an antifreeze-resistant material such as PP or PA66.

[0059] Combine Figure 3 The valve body 10 is provided with flow-increasing holes 14 on its sidewall, communicating with the valve cavity 11. When the valve core 30 moves toward the flow guide 20, the flow-increasing holes 14 communicate with the inlet 12, thereby increasing the effective flow area when the one-way valve is open and reducing fluid obstruction. It should be noted that the total effective flow area of ​​the flow-increasing holes 14 should be significantly smaller than the effective flow area of ​​the outlet 13. The number and size of the flow-increasing holes 14 can also be adjusted based on the total outlet flow demand.

[0060] Combine Figures 3-7 The side wall of the valve cavity 11 is provided with at least one guide ridge 15, and the guide ridge 15 extends along the axial direction of the valve body 10; the side wall of the valve core 30 is provided with a guide groove 31 adapted to the guide ridge 15 to ensure the stable axial sliding of the valve core 30 in the valve body 10 under the push of the fluid.

[0061] Combine Figure 7 and Figure 8 A plurality of support columns 32 are provided on the side of the valve core 30 facing the guide member 20, and the plurality of support columns 32 are evenly distributed along the circumference of the valve core 30; wherein, when the valve core 30 moves toward the guide member 20, the support columns 32 abut against the guide member 20 to ensure that there is a flow gap between the valve core 30 and the guide member 20 when the valve core 30 abuts against the guide member 20.

[0062] To ensure that the valve core 30 can block the inlet 12, in this embodiment, the lower end of the valve core 30 is able to enter and exit the inner cavity of the diversion inlet 12. Furthermore, a third sealing ring 34 is disposed over the lower end of the valve core 30 to seal the gap between the valve core 30 and the sidewall of the inlet 12. In this embodiment, an energy collecting groove 33 is provided on the valve core 30 directly opposite the diversion hole 21 to ensure that the fluid flowing out of the diversion hole 21 is concentrated in the middle of the valve core 30, providing sufficient sealing force.

[0063] Combine Figure 9 The diameter of the guide hole 21 gradually decreases along the reverse flow direction of the one-way valve to ensure that the reverse flow fluid can be concentrated on the middle part of the valve core 30.

[0064] Combine Figure 10 The side wall of the guide hole 21 is provided with a plurality of guide ribs 22, and the plurality of guide ribs 22 are evenly distributed along the circumference of the guide hole 21, so as to enhance the structural strength of the guide member 20 while playing a role in uniform flow guidance.

[0065] It is understood that the guide member 20 can be made of plastic to achieve multiple outputs from one mold, reducing the manufacturing cost of the one-way valve. For the thermal management system of new energy vehicles, the medium flowing therein is antifreeze. Therefore, the guide member 20 of the present application is made of antifreeze-resistant materials such as PP or PA66.

[0066] As for the installation of the flow guide 20, it can be fixedly installed by means of threaded engagement with the valve body 10, or it can be fixed to a corresponding position in the valve body 10 by means of screws, pins, etc. Of course, it is also possible to use welding to fix the flow guide 20 to the valve body 10. In this embodiment, the flow guide 20 is fixed by means of engagement between the mounting member and the corresponding portion in the valve body 10. Specifically:

[0067] This embodiment further includes a valve cover 40, which is disposed on one end of the valve cavity 11 where the outlet 13 is located, to facilitate assembly of the internal components of the one-way valve. Similarly, the valve cover 40 provided in this embodiment is made of an antifreeze-resistant material such as PP or PA66.

[0068] Accordingly, combined Figure 5 and Figure 6 The sidewall of the valve cavity 11 is provided with a plurality of limiting posts 16, which are evenly distributed along the circumference of the valve cavity 11. The flow guide 20 is pressed between the valve cover 40 and the limiting posts 16, so that the flow guide 20 is directly fixed by the valve cover 40 and the limiting posts 16. The inlet flow rate of the fluid can be controlled by changing the height of the limiting posts 16 (the higher the height, the greater the inlet flow rate, and vice versa).

[0069] In this embodiment, the valve cover 40 is snap-fitted to the valve body 10 to facilitate quick connection and removal of the valve cover 40 from the valve body 10. Accordingly, the valve cover 40 is provided with a plurality of connecting clips 41. At the same time, a plurality of connecting clip holes 17 adapted to the connecting clips 41 are provided at one end of the valve body 10 where the outflow port 13 is provided. The valve cover 40 is mounted on the valve body 10 through the cooperation of the connecting clips 41 and the connecting clips.

[0070] Combine Figure 11 and Figure 12 The valve cover 40 is provided with a mounting clip 42 on one side and a mounting hole 43 on the other side, allowing the one-way valve to be installed and secured by the mounting clip 42 and the mounting screw. This allows the one-way valve to be secured with a single screw of the appropriate specification, making it both convenient to replace (which requires multiple screws or specialized tools or cannot be removed with embedded systems) and more cost-effective than using a retaining spring.

[0071] On this basis, the valve body 10 is provided with a first sealing ring 18 at one end of the inlet 12, and the first sealing ring 18 is used to seal the gap between the valve body 10 and the corresponding inflow pipe 50; the valve cover 40 is provided with a second sealing ring 44, and the second sealing ring 44 is used to seal the gap between the valve cover 40 and the corresponding outflow pipe 60, so as to facilitate the direct installation of the one-way valve in the new energy thermal management module.

[0072] The first sealing ring 18 , the second sealing ring 44 and the third sealing ring 34 all need to be in contact with the antifreeze liquid. Therefore, in this embodiment, the first sealing ring 18 , the second sealing ring 44 and the third sealing ring 34 are all made of antifreeze-resistant materials such as EPDM.

[0073] In summary, the one-way valve provided in this embodiment includes a valve body 10, a guide member 20 and a valve core 30. The valve body 10 is provided with a valve cavity 11, an inlet 12 and an outlet 13. The guide member 20 is installed in the valve cavity 11, located at the end of the valve cavity 11 away from the inlet 12, and a guide hole 21 is provided in the middle. The valve core 30 is installed in the valve cavity 11, located between the inlet 12 and the guide member 20, and can slide along the axial direction of the valve body 10. When the valve core 30 and the guide member 20 are against each other, there is a flow gap between the guide member 20 and the side wall of the valve cavity 11. Therefore, when the fluid flows forward, it flows in from the fluid inlet 12 and pushes the valve core 30 to slide the guide member 20 to achieve conduction. When the fluid flows backward, the fluid pushes the middle part of the valve core 30 under the action of the guide member 20 to push the valve core 30 to seal the inlet 12, thereby achieving reverse cutoff and playing the role of one-way conduction.

[0074] Specific, combined Figure 13When the bottom inlet 12 of the check valve is pushed by the hydraulic pressure, the valve core 30 is pushed by the pressure and moves upward along the guide ridge 15 until the support column 32 on the valve core 30 contacts the guide piece 20 and stops moving, at which time the liquid flows upward around the gap of the valve core 30, flows out through the gradually changing guide hole 21 in the middle of the guide piece, and then flows into the outlet flow channel. At the same time, the liquid flows to the upper guide hole 21 and flows out through the flow increasing hole 14 to achieve the purpose of increasing the overall outlet flow of the check valve.

[0075] In combination Figure 14 When the side outlet 13 of the check valve is pushed by the liquid pressure, the liquid flows backward into the check valve, under the guide of the gradually changing guide hole 21 and the guide rib 22 in the guide piece 20, flows into the middle energy collecting groove 33 of the valve core 30, and accelerates to push the valve core 30 to slide downward along the guide ridge 15 until it stops moving by abutting against the shoulder at the end of the inlet 12, at which time the check valve achieves the cut-off action. It should be noted that when the liquid flows backward, although the flow increasing hole 14 on the side of the valve body 10 is in an open state, the flow area of the flow increasing hole 14 at this time is much smaller than that of the flow outlet 13, so when the liquid flows backward, it does not affect the closing speed of the valve core 30.

[0076] In this embodiment, the cut-off is achieved by the top pushing of the backward flow of the liquid. Compared with the spring assisted rebound locking structure, the opening pressure requirement is lower when the liquid flows forward, and sufficient reverse pressure can be provided. Although the spring locking structure is not used, the guide hole structure can assist to accelerate the locking force when the liquid flows backward, which is easy to control the internal leakage rate and has fast closing speed. The closing speed of the valve core in the backward flow state can be increased, the internal leakage rate is easy to control, the structure is simple, the overall size is small, the material cost is lower, and injection molded parts can be used to achieve plastic mold multi-output, effectively saving the machining cost. When the liquid flows forward, only the valve core 30 needs to be pushed to move, the opening pressure is low, and the valve core 30 moves in the valve cavity 11, so that the valve core 30 does not move to cause high internal leakage, and there is no requirement for the installation direction.

[0077] Meanwhile, the check valve provided by the embodiment has fewer parts (only 7) than the existing check valve, and the assembly process does not require any assembly tool and tool fixing, and does not require welding and bonding processes to achieve product offline, which can reduce the use of tools in the production process and improve the production efficiency and equipment investment. Moreover, the guide ridge 15 structure is designed on the matching surface between the inner cavity edge of the valve body 10 and the valve core 30, which can improve the closing speed and stability of the valve core 30 compared with the current non-spring return structure check valve, and can avoid performance degradation and internal sealing problems caused by spring life.

[0078] In summary, the one-way valve provided in this embodiment for the thermal management system of new energy vehicles does not require spring locking and can provide sufficient reverse pressure. It has the characteristics of simple structure, low opening pressure and easy control of internal leakage, and meets the use requirements of the antifreeze circuit of the thermal management system of new energy vehicles.

[0079] Example 2

[0080] Combine Figure 13 and 14 This embodiment provides a pipeline for a thermal management system of a new energy vehicle, including an inlet pipeline 50, an outlet pipeline 60 and the one-way valve for a thermal management system of a new energy vehicle described in Example 1; the valve body 10 is arranged in the outflow pipeline 60, and the outflow port 13 is connected to the inner cavity of the outflow pipeline 60; one end of the valve body 10 where the inflow port 12 is provided is inserted into the side wall of the inflow pipeline 50.

[0081] That is to say, the pipeline for the thermal management system of new energy vehicles provided in this embodiment includes an inlet pipeline 50, an outflow pipeline 60 and the one-way valve for the thermal management system of new energy vehicles recorded in Example 1. The valve body 10 is arranged in the outflow pipeline 60 (the outflow pipeline 60 is provided with an installation through hole at the corresponding position, and the installation through hole is sealed with the corresponding second sealing ring 44 through the valve cover 40), and the outflow port 13 is connected with the inner cavity of the outflow pipeline 60 to install the main body of the one-way valve in the outflow pipeline 60. At the same time, one end of the valve body 10 with the inlet 12 is inserted into the side wall of the inflow pipeline 50 (sealed by the first sealing ring 18), which can connect the inlet 12 of the one-way valve with the inner cavity of the pipeline to realize the inflow of fluid, thereby reducing the installation space occupied by the one-way valve and realizing the integration of the pipeline of the thermal management system of new energy vehicles.

[0082] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A one-way valve for a thermal management system of a new energy vehicle, characterized in that: include: The valve body (10) is provided with a valve cavity (11), and an inlet (12) and an outlet (13) are respectively provided at both ends, wherein the inlet (12) and the outlet (13) are in communication with the valve cavity (11); A flow guide member (20) is installed in the valve cavity (11), adapted to the valve cavity (11), located at one end of the valve cavity (11) away from the inlet (12), and provided with a flow guide hole (21) in the middle; A valve core (30) is installed in the valve cavity (11) and is located between the inlet (12) and the flow guide (20). The valve core (30) can slide along the axial direction of the valve body (10). When the valve core (30) abuts against the flow guide (20), a flow gap exists between the valve core (30) and the side wall of the valve cavity (11). An energy collecting groove (33) is provided at a position of the valve core (30) facing the flow guide hole (21); Wherein, when the fluid flows in a forward direction, the fluid pushes the valve core (30) to move toward the flow guide member (20); when the fluid flows in a reverse direction, the fluid flows from the flow guide hole (21) to the middle of the valve core (30) to push the valve core (30) to seal the inlet (12); A flow-increasing hole (14) is provided on the side wall of the valve body (10), and the flow-increasing hole (14) is in communication with the valve cavity (11); When the valve core (30) moves toward the flow guide member (20), the flow increasing hole (14) is connected to the inlet (12); The invention also includes a valve cover (40), wherein the valve cover (40) covers one end of the valve cavity (11) where the outflow port (13) is provided, and a plurality of limiting columns (16) are provided on the side wall of the valve cavity (11), wherein the plurality of limiting columns (16) are evenly distributed along the circumference of the valve cavity (11), and the flow guide (20) is pressed between the valve cover (40) and the limiting columns (16).

2. The one-way valve for a thermal management system of a new energy vehicle according to claim 1, characterized in that: The diameter of the guide hole (21) gradually decreases along the reverse flow direction of the one-way valve.

3. The one-way valve for a thermal management system of a new energy vehicle according to claim 2, characterized in that: A plurality of guide ribs (22) are provided on the side wall of the guide hole (21), and the plurality of guide ribs (22) are evenly distributed along the circumference of the guide hole (21).

4. The one-way valve for a thermal management system of a new energy vehicle according to claim 1, characterized in that: The side wall of the valve cavity (11) is provided with at least one guide ridge (15), and the guide ridge (15) extends along the axial direction of the valve body (10); The side wall of the valve core (30) is provided with a guide groove (31) adapted to the guide ridge (15).

5. The one-way valve for a thermal management system of a new energy vehicle according to claim 1, characterized in that: A plurality of support columns (32) are provided on a side of the valve core (30) facing the flow guide member (20), and the plurality of support columns (32) are evenly distributed along the circumference of the valve core (30); Wherein, when the valve core (30) moves toward the flow guide (20), the support column (32) abuts against the flow guide (20).

6. The one-way valve for a thermal management system of a new energy vehicle according to claim 1, characterized in that: The valve cover (40) is snap-connected to the valve body (10).

7. The one-way valve for a thermal management system of a new energy vehicle according to claim 1, characterized in that: One side of the valve cover (40) is provided with a mounting buckle (42), and the other side is provided with a mounting hole (43).

8. The one-way valve for a thermal management system of a new energy vehicle according to claim 1, characterized in that: A first sealing ring (18) is provided at one end of the valve body (10) where the inlet (12) is provided, and the first sealing ring (18) is used to seal the gap between the valve body (10) and the corresponding inflow pipe (50); The valve cover (40) is provided with a second sealing ring (44), and the second sealing ring (44) is used to seal the gap between the valve cover (40) and the corresponding outflow pipe (60).

9. A pipeline for a thermal management system of a new energy vehicle, characterized in that: It comprises an inflow pipe (50), an outflow pipe (60) and a one-way valve for a thermal management system of a new energy vehicle according to any one of claims 1 to 8; The valve body (10) is arranged in the outflow pipe (60), and the outflow port (13) is in communication with the inner cavity of the outflow pipe (60); One end of the valve body (10) where the inlet (12) is provided is inserted into the side wall of the inflow pipe (50).

Images