Valve seat, flow control device, and thermal management system

Abstract

The present application provides a valve seat, a flow control device, and a thermal management system; the valve seat is used for mounting an one-way valve and an electronic expansion valve, a first flow channel and a second flow channel are formed in the valve seat, and the one-way valve is arranged in the first flow channel and works in conjunction with the inner wall of the first flow channel, so that liquid in the first flow channel flows in one direction; and the electronic expansion valve is arranged on the valve seat and cooperates with the second flow channel to control the connection / disconnection of the second flow channel, wherein the first flow channel and the second flow channel are independently arranged in the valve seat at an interval. The present application achieves that the flow channel controlled by the one-way valve and the flow channel controlled by the electronic expansion valve operate independently, without affecting each other and without intersection, thereby ensuring that the expansion valve and the one-way valve can operate independently, the adjusting effects of the one-way valve and the electronic expansion valve can be achieved respectively, and the use requirements of multiple modes and multiple working conditions of the thermal management system are efficiently met. The valve seat provided by the present application is reliable in operation, simple in structure, easy to machine, and low in cost.

Description

Valve seats, flow control devices and thermal management systems

[0001] This application claims priority to the patent application entitled “Valve seat, flow control device and thermal management system” filed with the State Intellectual Property Office of China on December 13, 2023, with application number 202323406375.1. Technical Field

[0002] The present application relates to the technical field of valve equipment, and in particular to a valve seat, a flow control device and a thermal management system. Background Art

[0003] At present, the flow control device in the existing thermal management system (especially the vehicle-mounted thermal management system) includes an electronic expansion valve and a one-way valve arranged in the pipeline to control the refrigerant in the pipeline through the electronic expansion valve and the one-way valve; in order to simplify the structure, the existing electronic expansion valve and the one-way valve are usually integrated and installed on a valve seat, and the interior of the valve seat has an expansion valve cavity that cooperates with the electronic expansion valve and a one-way valve cavity that cooperates with the one-way valve. The expansion valve cavity and the one-way valve cavity inside the existing valve seat can usually be connected, so that the electronic expansion valve and the one-way valve cannot be opened at the same time or work separately, that is, there is an intersection between the expansion valve cavity and the one-way valve cavity, resulting in only a single flow path being allowed to flow during operation, that is, when the electronic expansion valve is closed, the one-way valve is opened, and the fluid only flows through the one-way valve; when the one-way valve is closed, the electronic expansion valve is opened, and the fluid only flows through the electronic expansion valve. As a result, under some operating conditions of the thermal management system, the electronic expansion valve and the one-way valve integrated on one valve seat cannot allow two flow paths to flow at the same time, that is, the electronic expansion valve and the one-way valve cannot be in the open mode at the same time; the flexibility of regulating the refrigerant flow is limited, and the regulating functions of the one-way valve and the electronic expansion valve cannot be exerted separately, which cannot meet the multi-mode and multi-operating condition usage requirements of the thermal management system.

[0004] Application Contents

[0005] The present application provides a valve seat, a flow control device and a thermal management system to solve the problem that the electronic expansion valve and the one-way valve in the prior art cannot work independently, and thus cannot meet the multi-mode and multi-working condition requirements of the thermal management system.

[0006] In order to solve the above problems, according to one aspect of the present application, a valve seat is provided, which is used to install a one-way valve and an electronic expansion valve. The valve seat has a first flow channel and a second flow channel inside. The one-way valve is arranged in the first flow channel and cooperates with the inner wall of the first flow channel to allow the liquid in the first flow channel to flow in one direction; the electronic expansion valve is arranged on the valve seat and cooperates with the second flow channel to control the on and off of the second flow channel; wherein the first flow channel and the second flow channel are independently arranged at intervals inside the valve seat.

[0007] Furthermore, the two ends of the second flow channel are respectively a first through port and a second through port, and the first through port and the second through port are respectively arranged on opposite sides of the outer periphery of the valve seat; when the electronic expansion valve is in an open state, the first through port is connected to the second through port; when the electronic expansion valve is in a closed state, the first through port and the second through port are disconnected.

[0008] Furthermore, the second flow channel includes a first passing section, an installation section and a second passing section which are connected in sequence, a part of the electronic expansion valve is arranged in the installation section and cooperates with the inner wall of the installation section; the first passing port is the opening of the first passing section, and the second passing port is the opening of the second passing section; wherein, the central axis of the first passing section is parallel to the central axis of the second passing section; the central axis of the first passing section and the central axis of the second passing section are respectively perpendicular to the central axis of the installation section; the electronic expansion valve controls the on and off of the second flow channel by lifting and lowering the internal valve needle, and the lifting direction of the valve needle is parallel to the central axis of the installation section.

[0009] Furthermore, the two ends of the first flow channel are a one-way inlet and a one-way outlet, respectively, and the one-way outlet and the one-way inlet are respectively arranged on opposite sides of the outer periphery of the valve seat, one of the one-way inlet and the one-way outlet is located on the same side of the outer periphery of the valve seat as the second through port, and the other is located on the same side of the outer periphery of the valve seat as the first through port; when the one-way valve is in an open state, the one-way outlet is connected to the one-way inlet, and liquid enters from the one-way inlet and flows out from the one-way outlet; when the one-way valve is in a closed state, the one-way outlet is disconnected from the one-way inlet.

[0010] Furthermore, the first flow channel includes an entry section, an opening and closing section, and an outflow section that are connected in sequence, and the one-way valve can be movably arranged in the opening and closing section and is limited by the inner wall of the opening and closing section; the one-way inlet is the entrance of the entry section, and the one-way outlet is the outlet of the outflow section; wherein, the central axis of the entry section, the central axis of the opening and closing section, and the central axis of the outflow section are collinear; the movement direction of the one-way valve is parallel to the central axis of the opening and closing section.

[0011] Furthermore, the connection between the opening and closing section and the entry section is a first valve port, and the one-way valve is used to open and close the first valve port; the opening and closing section has an expanded diameter portion at one end close to the first valve port, and the flow area of ​​the expanded diameter portion is larger than the flow area of ​​the first valve port; wherein the inner wall surface of the expanded diameter portion is a conical surface; the opening and closing section also includes a straight tube portion connected to the expanded diameter portion, the inner diameter of the straight tube portion is smaller than the inner diameter of the entry section and the outflow section, and the inner wall surface of the straight tube portion is a cylindrical surface.

[0012] Furthermore, the second flow channel includes a first passing section, an installation section, and a second passing section that are connected in sequence, and a portion of the electronic expansion valve is arranged in the installation section and cooperates with the inner wall of the installation section; the central axis of the first passing section and the central axis of the second passing section are respectively parallel to the central axis of the entrance section, the central axis of the opening and closing section, and the central axis of the outflow section.

[0013] According to another aspect of the present application, a flow control device is provided, which is used in a thermal management system to control the flow of liquid; the flow control device includes a one-way valve, an electronic expansion valve and the above-mentioned valve seat, the one-way valve is arranged in the first flow channel of the valve seat, and the electronic expansion valve cooperates with the second flow channel of the valve seat.

[0014] Furthermore, the first flow channel includes an entry section, an opening and closing section, and an outflow section that are connected in sequence, and the connection between the opening and closing section and the entry section is the first valve port; the opening and closing section has an expanded diameter portion at one end close to the first valve port; the one-way valve includes a guide member, a piston member, and a sealing member; one end of the guide member is fixedly arranged, and the other end is elastically limited and matched with one end of the piston member; the other end of the piston member is arranged toward the first valve port; the sealing member is installed on the other end of the piston member for abutting and matching with the inner wall of the expanded diameter portion; the piston member moves along the central axis of the opening and closing section under the guiding action of the guide member to drive the sealing member to open and close the first valve port.

[0015] Furthermore, the one-way valve also includes an elastic part; the interior of the guide part has a first limiting cavity, the interior of the piston part has a second limiting cavity, a part of the guide part is located in the second limiting cavity, and is slidingly limited with the inner wall of the second limiting cavity; a part of the elastic part is located in the first limiting cavity, and the other part is located in the second limiting cavity; the two ends of the elastic part respectively abut against the bottom wall of the first limiting cavity and the bottom wall of the second limiting cavity, so that the guide part and the piston part are elastically matched.

[0016] Furthermore, the electronic expansion valve includes a valve needle, a drive screw and a transmission structure. The drive screw is connected to the valve needle through the transmission structure. The drive screw can rotate relative to the valve needle. The drive screw drives the valve needle to move axially through axial movement to control the opening and closing of the electronic expansion valve.

[0017] Furthermore, the electronic expansion valve also includes a protective shell structure and a mounting seat structure, the protective shell structure has a protective cavity inside, and the drive screw and at least a portion of the transmission structure are located in the protective cavity; the protective shell structure is fixedly set on the mounting seat structure; wherein, the second flow channel includes a first passing section, a mounting section and a second passing section connected in sequence, and at least a portion of the mounting seat structure is set in the mounting section.

[0018] Furthermore, the electronic expansion valve also includes a sealing body structure and a switch seat structure, wherein one end of the sealing body structure along the axial direction of the valve needle is arranged at the end of the mounting seat structure away from the protective shell structure, and the interior is connected to the protective cavity; the valve needle is movably arranged on the sealing body structure, and is limitedly matched with the inner wall of the sealing body structure; the switch seat structure is fixedly arranged on the other end of the sealing body structure along the axial direction of the valve needle, and a valve port flow channel is provided inside the switch seat structure, and the two ends of the valve port flow channel are respectively connected with the interior of the sealing body structure and the second passing section, wherein the sealing body structure and the switch seat structure are respectively arranged in the mounting section; the valve needle controls the on-off of the first passing section and the second passing section by opening and closing the valve port flow channel.

[0019] Furthermore, a portion of the switch seat structure extends into the interior of the sealing body structure, and this portion is the extending section, which is sealed with the inner wall of the sealing body structure; the valve port flow channel passes through the extending section to communicate with the interior of the sealing body structure; the opening of the valve port flow channel located in the extending section is a conical opening, and the valve needle includes a conduction section, a first conical section and a second conical section connected in sequence along the axial direction of the valve needle, and the conduction section is connected to the transmission structure; wherein, when the valve needle closes the valve port flow channel, the outer periphery of the first conical section is sealed with the conical opening, and the second conical section extends into the valve port flow channel.

[0020] Furthermore, the electronic expansion valve also includes a first sealing ring structure, the outer periphery of which is sealed with the inner wall of the installation section; wherein the first sealing ring structure is located in a groove formed by the switch seat structure and the sealing body structure.

[0021] Furthermore, the electronic expansion valve also includes a second sealing ring structure, the mounting section has a mounting groove, and at least a portion of the second sealing ring is arranged in the mounting groove; the second sealing ring structure is respectively abutted against the mounting seat structure and the bottom wall of the mounting groove at both ends along the axial direction of the valve needle to seal the gap between the mounting groove and the mounting seat structure.

[0022] Furthermore, the electronic expansion valve also includes an electromagnetic coil structure, which is arranged outside the protective shell structure and is connected to an external power supply for driving the driving screw to move axially.

[0023] According to another aspect of the present application, a thermal management system is provided, which includes the above-mentioned flow control device.

[0024] Applying the technical solution of the present application, the present application provides a valve seat, which is used to install a one-way valve and an electronic expansion valve. The valve seat has a first flow channel and a second flow channel inside. The one-way valve is arranged in the first flow channel and cooperates with the inner wall of the first flow channel to allow the liquid in the first flow channel to flow in one direction; the electronic expansion valve is arranged on the valve seat and cooperates with the second flow channel to control the on and off of the second flow channel; wherein, the first flow channel and the second flow channel are independently arranged at intervals inside the valve seat. The present application sets the first flow channel and the second flow channel independently at intervals inside the valve seat, thereby achieving independent operation of the flow channel controlled by the one-way valve and the flow channel controlled by the electronic expansion valve, without affecting each other and without intersection, thereby ensuring that the expansion valve and the one-way valve can work independently, and can respectively play the regulating role of the one-way valve and the electronic expansion valve, effectively meeting the multi-mode and multi-working condition use requirements of the thermal management system; the valve seat proposed in the present application is reliable in operation and simple in structure, easy to process and low in cost, and can flexibly adapt to different one-way valves and electronic expansion valves by flexibly setting the specific parameters of the first flow channel and the second flow channel, and is suitable for large-scale promotion and use; the flow control device using the valve seat proposed in the present application has both throttling function and one-way straight-through function, and in actual use, the throttling function and / or straight-through function can be selected according to the use requirements of the thermal management system; the flow control device using the valve seat proposed in the present application has a high degree of product integration and a compact structure, which is conducive to simplifying pipeline connections and reducing occupied space. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings that constitute part of this application are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0026] FIG1 shows a schematic diagram of the internal structure of a valve seat provided in an embodiment of the present application;

[0027] FIG2 shows a partial structural diagram of a flow control device provided in an embodiment of the present application;

[0028] FIG3 shows a partial enlarged view of the location of the one-way valve in FIG2 ;

[0029] FIG4 shows a partial enlarged view of the switch base structure in FIG2 .

[0030] Among them, the above-mentioned drawings include the following figure marks: 10, one-way valve; 11, guide member; 111, first limiting cavity; 12, piston member; 121, second limiting cavity; 13, sealing member; 14, elastic member; 20, electronic expansion valve; 21, valve needle; 211, conduction section; 212, first conical section; 213, second conical section; 22, drive screw; 23, transmission structure; 24, protective shell structure; 241, protective cavity; 25, mounting seat structure; 26, sealing body structure; 27, switch seat structure; 271, valve port flow channel; 272, extension section; 28, first sealing ring structure; 29, second sealing ring structure; 291, electromagnetic coil structure; 30, first flow channel; 31, one-way inlet; 32, one-way outlet; 33, entry section; 34, opening and closing section; 341, Expanded diameter portion; 342, straight tube portion; 35, outflow section; 36, first valve port; 40, second flow channel; 41, first through port; 42, second through port; 43, first through section; 44, mounting section; 441, mounting groove; 45, second through section. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0032] As shown in Figures 1 to 4, an embodiment of the present application provides a valve seat, which is used to install a one-way valve 10 and an electronic expansion valve 20. The valve seat has a first flow channel 30 and a second flow channel 40 inside. The one-way valve 10 is arranged in the first flow channel 30 and cooperates with the inner wall of the first flow channel 30 to allow the liquid in the first flow channel 30 to flow in one direction; the electronic expansion valve 20 is arranged on the valve seat and cooperates with the second flow channel 40 to control the on and off of the second flow channel 40; wherein, the first flow channel 30 and the second flow channel 40 are independently arranged at intervals inside the valve seat.

[0033] The present application sets the first flow channel 30 and the second flow channel 40 independently at intervals inside the valve seat, thereby achieving the independent operation of the flow channel controlled by the one-way valve 10 and the flow channel controlled by the electronic expansion valve 20, without affecting each other and without intersection, thereby ensuring that the expansion valve and the one-way valve 10 can work independently, and can respectively play the regulating role of the one-way valve 10 and the electronic expansion valve 20, effectively meeting the multi-mode and multi-working condition use requirements of the thermal management system; the valve seat proposed in the present application is reliable and has a simple structure, is easy to process and has low cost, and can be flexibly adapted to different one-way valves 10 and electronic expansion valves 20 by flexibly setting the specific parameters of the first flow channel 30 and the second flow channel 40, and is suitable for large-scale promotion and use; the flow control device using the valve seat proposed in the present application has both a throttling function and a one-way straight-through function. In actual use, the throttling function and / or the straight-through function can be selected to take effect according to the use requirements of the thermal management system; the flow control device using the valve seat proposed in the present application has a high degree of product integration and a compact structure, which is conducive to simplifying pipeline connections and reducing occupied space.

[0034] It should be noted that the first flow channel 30 and the second flow channel 40 are independently provided inside the valve seat, which means that the first flow channel 30 and the second flow channel 40 are not connected.

[0035] As shown in Figures 1 and 2, the two ends of the second flow channel 40 are respectively a first through port 41 and a second through port 42. The first through port 41 and the second through port 42 are respectively arranged on opposite sides of the outer periphery of the valve seat, and the diameter of the first through port 41 is different from that of the second through port 42. When the electronic expansion valve 20 is in the open state, the first through port 41 is connected to the second through port 42; when the electronic expansion valve 20 is in the closed state, the first through port 41 is disconnected from the second through port 42.

[0036] By arranging the first through port 41 and the second through port 42 on both sides of the outer periphery of the valve seat respectively, the processing of the first through port 41 and the second through port 42 on the valve seat and the subsequent installation of the pipeline are facilitated; by setting the caliber of the first through port 41 to be different from the caliber of the second through port 42, the second flow channel 40 has a fluid pressure regulating function.

[0037] It should be noted that in actual use, the diameters of the first through port 41 and the second through port 42 can be flexibly set according to the flow rate, flow direction and pressure change requirements of the actual fluid regulation to improve applicability.

[0038] As shown in Figures 1 and 2, the second flow channel 40 includes a first through section 43, a mounting section 44 and a second through section 45 which are connected in sequence. A portion of the electronic expansion valve 20 is arranged in the mounting section 44 and cooperates with the inner wall of the mounting section 44; the first through port 41 is the opening of the first through section 43, and the second through port 42 is the opening of the second through section 45; wherein, the central axis of the first through section 43 is parallel to the central axis of the second through section 45; the central axis of the first through section 43 and the central axis of the second through section 45 are respectively perpendicular to the central axis of the mounting section 44; the electronic expansion valve 20 controls the on and off of the second flow channel 40 by lifting and lowering the internal valve needle 21, and the lifting direction of the valve needle 21 is parallel to the central axis of the mounting section 44.

[0039] By setting the central axis of the first through section 43 and the central axis of the second through section 45 to be parallel, the processing and forming of the first through section 43 and the second through section 45 on the valve seat and the direct installation of the subsequent pipeline are facilitated; by setting the central axis of the first through section 43 and the central axis of the second through section 45 to be perpendicular to the central axis of the installation section 44, respectively, the convenient installation and reliable operation of the subsequent electronic expansion valve 20 are ensured.

[0040] In a specific embodiment of the present application, the first through opening 41 and the second through opening 42 are chamfered to facilitate accurate centering and installation of subsequent pipe joints.

[0041] As shown in Figures 1, 2, and 3, the first flow channel 30 has a one-way inlet 31 and a one-way outlet 32 ​​at either end. The one-way outlet 32 ​​and the one-way inlet 31 are located on opposite sides of the valve seat periphery, and the diameter of the one-way inlet 31 is the same as that of the one-way outlet 32. One of the one-way inlet 31 and the one-way outlet 32 ​​is located on the same side of the valve seat periphery as the second through-port 42, and the other is located on the same side of the valve seat periphery as the first through-port 41. When the one-way valve 10 is in the open state, the one-way outlet 32 ​​is connected to the one-way inlet 31, and liquid enters through the one-way inlet 31 and flows out of the one-way outlet 32. When the one-way valve 10 is in the closed state, the one-way outlet 32 ​​is disconnected from the one-way inlet 31. By setting the diameter of the one-way inlet 31 to be the same as that of the one-way outlet 32, the one-way inlet 31 and the one-way outlet 32 ​​can be formed in one process, and the pressure change of the fluid after passing through the first flow channel 30 is relatively small.

[0042] As shown in Figures 1, 2, and 3, the first flow channel 30 includes an inlet section 33, an opening and closing section 34, and an outlet section 35, which are sequentially connected. The one-way valve 10 is movably disposed within the opening and closing section 34 and engages with the inner wall of the opening and closing section 34. The one-way inlet 31 serves as the entrance to the inlet section 33, and the one-way outlet 32 ​​serves as the outlet of the outlet section 35. The central axes of the inlet section 33, the opening and closing section 34, and the outlet section 35 are collinear. The movement direction of the one-way valve 10 is parallel to the central axis of the opening and closing section 34. By arranging the central axes of the inlet section 33, the opening and closing section 34, and the outlet section 35 to be collinear, the structural simplicity of the first flow channel 30 and smooth flow are ensured.

[0043] In a specific embodiment of the present application, the one-way inlet 31 and the one-way outlet 32 ​​are chamfered to facilitate accurate centering and installation of subsequent pipe joints.

[0044] As shown in Figures 1, 2 and 3, the connection between the opening and closing section 34 and the entry section 33 is the first valve port 36, and the one-way valve 10 is used to open and close the first valve port 36; the opening and closing section 34 has an expanded diameter portion 341 at one end close to the first valve port 36, and the flow area of ​​the expanded diameter portion 341 is larger than the flow area of ​​the first valve port 36; wherein, the inner wall surface of the expanded diameter portion 341 is a conical surface; the opening and closing section 34 also includes a straight tube portion 342 connected to the expanded diameter portion 341, the inner diameter of the straight tube portion 342 is smaller than the inner diameter of the entry section 33 and the outflow section 35, and the inner wall surface of the straight tube portion 342 is a cylindrical surface.

[0045] By setting the flow area of ​​the expanded diameter portion 341 to be larger than the flow area of ​​the first valve port 36 (for example, the maximum size of the expanded diameter portion is larger than the inner diameter of the first valve port), throttling in the first flow channel 30 is avoided, thereby improving the flow capacity of the first flow channel 30; by setting the inner diameter of the straight tube portion 342 to be smaller than the inner diameters of the inlet section 33 and the outlet section 35, the flow rate of the fluid in the straight tube portion 342 is effectively improved.

[0046] As shown in Figures 1 and 2, the second flow passage 40 includes a first passage section 43, a mounting section 44, and a second passage section 45, which are sequentially connected. A portion of the electronic expansion valve 20 is disposed within the mounting section 44 and engages with the inner wall of the mounting section 44. The central axes of the first passage section 43 and the second passage section 45 are parallel to the central axes of the inlet section 33, the opening and closing section 34, and the outlet section 35, respectively. This arrangement allows the valve seat to be positioned and machined in a single process during drilling, with at least the first passage section 43, the second passage section 45, the inlet section 33, and the outlet section 35 being drilled sequentially. This ensures that the entire valve seat is easily machined and effectively reduces processing costs.

[0047] The present application also provides a flow control device, which is used in a thermal management system to control the flow of liquid. The flow control device includes a one-way valve 10, an electronic expansion valve 20, and the aforementioned valve seat. The one-way valve 10 is disposed in a first flow channel 30 of the valve seat, and the electronic expansion valve 20 cooperates with a second flow channel 40 of the valve seat. The flow control device proposed in the present application has both a throttling function and a one-way direct-through function. In actual use, the throttling function and / or the direct-through function can be selected to be effective according to the use requirements of the thermal management system. The flow control device using the valve seat proposed in the present application has a high degree of product integration and a compact structure, which is conducive to simplifying pipeline connections and reducing occupied space.

[0048] It should be noted that: if the flow control device is used in an air conditioner, the one-way valve 10 can prevent the refrigerant from flowing back; if the flow control device is used in a hydraulic system, the one-way valve 10 can prevent the hydraulic oil from flowing in the opposite direction; if the flow control device is used in a pneumatic system, the one-way valve 10 can prevent the compressed air from flowing in the opposite direction.

[0049] As shown in FIG2 , the first flow channel 30 includes an inlet section 33, an opening and closing section 34, and an outlet section 35, which are connected in sequence. The connection between the opening and closing section 34 and the inlet section 33 forms a first valve port 36. The opening and closing section 34 has an expanded diameter portion 341 at one end near the first valve port 36. The one-way valve 10 includes a guide member 11, a piston member 12, and a sealing member 13. One end of the guide member 11 is fixed, and the other end is elastically limited and engaged with one end of the piston member 12. The other end of the piston member 12 is arranged toward the first valve port 36. The sealing member 13 is mounted on the other end of the piston member 12 and is used to abut against the inner wall of the expanded diameter portion 341. Under the guidance of the guide member 11, the piston member 12 moves along the central axis of the opening and closing section 34 to drive the sealing member 13 to open and close the first valve port 36. This arrangement not only ensures the working reliability of the one-way valve 10, but also simplifies the structure of the one-way valve 10, thereby effectively reducing costs and facilitating subsequent maintenance and replacement.

[0050] It should be noted that, in actual use, it is found that when the piston member 12 of the one-way valve 10 moves toward or away from the first valve port 36, the first flow channel 30 often experiences throttling due to the expansion of the sealing member 13, which hinders the flow of the fluid and thus has an adverse effect on the normal operation of the one-way valve 10; therefore, the present application effectively avoids the risk of throttling and improves the flow capacity by providing an expanded diameter portion 341 in the opening and closing section 34, and the inner wall surface of the expanded diameter portion 341 is a conical surface.

[0051] As shown in Figure 3, the one-way valve 10 also includes an elastic member 14; the interior of the guide member 11 has a first limiting cavity 111, and the interior of the piston member 12 has a second limiting cavity 121. A portion of the guide member 11 is located in the second limiting cavity 121 and is slidably limited with the inner wall of the second limiting cavity 121; a portion of the elastic member 14 is located in the first limiting cavity 111, and the other portion is located in the second limiting cavity 121; the two ends of the elastic member 14 are respectively in contact with the bottom wall of the first limiting cavity 111 and the bottom wall of the second limiting cavity 121, so that the guide member 11 and the piston member 12 are elastically matched.

[0052] By arranging an elastic member 14 (for example, a spring) between the guide member 11 and the piston member 12, the rapid response and adaptive adjustment of the one-way valve 10 during the opening and closing process are ensured, thereby greatly improving the reliability and service life of the one-way valve 10; at the same time, this design helps to reduce the vibration and noise of the one-way valve 10 during operation, thereby improving the user experience and reducing maintenance costs.

[0053] As shown in Figure 2, the electronic expansion valve 20 includes a valve needle 21, a driving screw 22 and a transmission structure 23. The driving screw 22 is connected to the valve needle 21 through the transmission structure 23. The driving screw 22 can rotate relative to the valve needle 21. The driving screw 22 drives the valve needle 21 to move axially by axial movement to control the opening and closing of the electronic expansion valve 20.

[0054] By setting a drive screw 22 and a transmission structure 23 to control the axial movement of the valve needle 21, the electronic expansion valve 20 can accurately adjust the fluid flow to adapt to different working requirements. This design improves the accuracy and speed of valve control, enhances the adaptability and flexibility of the thermal management system in complex environments, reduces energy consumption, and improves the overall energy efficiency of the system; at the same time, since the drive screw 22 will rotate relative to the valve needle 21 when it moves axially, the drive screw 22 and the valve needle 21 are connected by setting a transmission structure 23 in this application, so that when the drive screw 22 moves axially, the valve needle 21 will only move axially and will not rotate, thereby avoiding the wear of the switch seat structure 27 caused by the rotation of the valve needle 21, thereby improving the service life of the switch seat structure 27.

[0055] As shown in Figure 2, the electronic expansion valve 20 also includes a protective shell structure 24 and a mounting seat structure 25. The protective shell structure 24 has a protective cavity 241 inside, and the drive screw 22 and at least a portion of the transmission structure 23 are located in the protective cavity 241; the protective shell structure 24 is fixedly set on the mounting seat structure 25; wherein, the second flow channel 40 includes a first through section 43, a mounting section 44 and a second through section 45 that are connected in sequence, and at least a portion of the mounting seat structure 25 is arranged in the mounting section 44 and cooperates with the inner wall of the mounting section 44 so that the electronic expansion valve 20 is installed on the valve seat.

[0056] The design of the protective shell structure 24 and the mounting seat structure 25 not only protects the drive screw 22 and the transmission structure 23 inside the electronic expansion valve 20, but also simplifies the installation process of the valve and reduces the difficulty of maintenance. This structural design improves the working stability of the electronic expansion valve, extends its service life, and also enhances the overall reliability and performance of the thermal management system.

[0057] As shown in Figures 2 and 4, the electronic expansion valve 20 also includes a sealing body structure 26 and a switch seat structure 27. One end of the sealing body structure 26 along the axial direction of the valve needle 21 is arranged at the end of the mounting seat structure 25 away from the protective shell structure 24, and the interior is connected to the protective cavity 241; the valve needle 21 is movably arranged on the sealing body structure 26 and is limited by the inner wall of the sealing body structure 26; the switch seat structure 27 is fixedly arranged on the other end of the sealing body structure 26 along the axial direction of the valve needle 21, and a valve port flow channel 271 is provided inside the switch seat structure 27, and the two ends of the valve port flow channel 271 are respectively connected to the interior of the sealing body structure 26 and the second through section 45, wherein the sealing body structure 26 and the switch seat structure 27 are respectively arranged in the mounting section 44; the valve needle 21 controls the on-off of the first through section 43 and the second through section 45 by opening and closing the valve port flow channel 271.

[0058] The arrangement of the sealing structure 26 and the switch base structure 27 ensures a secure seal during the opening and closing of the electronic expansion valve 20. The valve needle 21 finely regulates the fluid flow rate by controlling the opening and closing of the valve port flow passage 271. This design improves the control accuracy of the electronic expansion valve, reduces energy loss during system operation, and enhances the overall efficiency of the thermal management system.

[0059] As shown in Figure 4, a part of the switch seat structure 27 extends into the interior of the sealing body structure 26, and this part is the extension section 272, and the extension section 272 is sealed with the inner wall of the sealing body structure 26; the valve port flow channel 271 passes through the extension section 272 to communicate with the interior of the sealing body structure 26; the opening of the valve port flow channel 271 located at the extension section 272 is a conical opening, and the valve needle 21 includes a conduction section 211, a first conical section 212 and a second conical section 213 connected in sequence along the axial direction of the valve needle 21, and the conduction section 211 is connected to the transmission structure 23; wherein, when the valve needle 21 closes the valve port flow channel 271, the outer periphery of the first conical section 212 is sealed with the conical opening, and the second conical section 213 extends into the valve port flow channel 271.

[0060] By arranging the valve needle 21 to precisely match the tapered opening on the insertion section 272, and the insertion design of the second tapered section 213, the sealing of the electronic expansion valve in the closed state and the flowability in the open state are ensured. This optimized design improves the accuracy and reliability of valve control and reduces the flow loss of fluid during system operation.

[0061] As shown in Figures 2 and 4, the electronic expansion valve 20 also includes a first sealing ring structure 28, which is sleeved on the outer periphery of the switch seat structure 27, and the outer periphery of the first sealing ring structure 28 is sealed with the inner wall of the mounting section 44; wherein, the first sealing ring structure 28 is located in the groove formed by the switch seat structure 27 and the sealing body structure 26.

[0062] In one embodiment of the present application, the end of the switch seat structure 27 away from the sealing body structure 26 and the sealing body structure 26 are respectively limitedly matched with the first sealing ring structure 28 to constrain the first sealing ring structure 28 along the axial direction of the valve needle 21.

[0063] The provision of the first sealing ring structure 28, and its limiting cooperation with the switch seat structure 27 and the sealing body structure 26, ensures a good seal between the electronic expansion valve 20 and the valve seat during operation, thereby avoiding fluid leakage. This design not only improves the working reliability of the electronic expansion valve and the overall performance of the thermal management system, but also reduces maintenance costs and energy consumption.

[0064] As shown in Figure 2, the electronic expansion valve 20 also includes a second sealing ring structure 29. The mounting section 44 has a mounting groove 441, and at least a portion of the second sealing ring is arranged in the mounting groove 441; the second sealing ring structure 29 abuts against the mounting seat structure 25 and the bottom wall of the mounting groove 441 at both ends along the axial direction of the valve needle 21, respectively, to seal the gap between the mounting groove 441 and the mounting seat structure 25.

[0065] The coordinated design of the second sealing ring structure 29 and the mounting groove 441 further enhances the sealing between the electronic expansion valve 20 and the valve seat, especially under high-pressure fluid conditions, which can effectively prevent fluid leakage and ensure the safe operation of the system.

[0066] As shown in FIG. 2 , the electronic expansion valve 20 further includes an electromagnetic coil structure 291 . The electromagnetic coil structure 291 is disposed outside the protective shell structure 24 and is connected to an external power source for driving the driving screw 22 to move axially.

[0067] By providing the electromagnetic coil structure 291, a stable and controllable driving force is provided for the driving screw 22, so that the electronic expansion valve can quickly respond to system requirements and achieve precise flow control.

[0068] The present application also provides a thermal management system, which includes the above-mentioned flow control device. The thermal management system proposed in the present application can be used as an air conditioner, especially as a vehicle air conditioner. The thermal management system proposed in the present application has a high degree of integration and a compact structure.

[0069] In summary, the present application provides a valve seat, a flow control device and a thermal management system. The present application sets the first flow channel 30 and the second flow channel 40 to be independently spaced apart inside the valve seat, thereby realizing that the flow channel controlled by the one-way valve 10 and the flow channel controlled by the electronic expansion valve 20 work independently, do not affect each other and have no intersection, thereby ensuring that the expansion valve and the one-way valve 10 can work independently, and can play the regulating role of the one-way valve 10 and the electronic expansion valve 20 respectively, and efficiently meet the use requirements of the thermal management system in multiple modes and multiple working conditions; the valve seat proposed in the present application is reliable in operation and structurally sound. It is simple, easy to process and low-cost. Different one-way valves 10 and electronic expansion valves 20 can be flexibly adapted by flexibly setting the specific parameters of the first flow channel 30 and the second flow channel 40, and it is suitable for large-scale promotion and use. The flow control device using the valve seat proposed in this application has both a throttling function and a one-way straight-through function. In actual use, the throttling function and / or the straight-through function can be selected to take effect according to the use requirements of the thermal management system. The flow control device using the valve seat proposed in this application has a high degree of product integration and a compact structure, which is conducive to simplifying pipeline connections and reducing occupied space.

[0070] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A valve seat, characterized in that: The valve seat is used to install a one-way valve (10) and an electronic expansion valve (20); a first flow channel (30) and a second flow channel (40) are provided inside the valve seat; the one-way valve (10) is arranged in the first flow channel (30) and cooperates with the inner wall of the first flow channel (30) to allow the liquid in the first flow channel (30) to flow in one direction; the electronic expansion valve (20) is arranged on the valve seat and cooperates with the second flow channel (40) to control the opening and closing of the second flow channel (40); wherein the first flow channel (30) and the second flow channel (40) are independently arranged at intervals inside the valve seat.

2. The valve seat according to claim 1, characterized in that: The two ends of the second flow channel (40) are respectively a first through port (41) and a second through port (42), and the first through port (41) and the second through port (42) are respectively arranged on opposite sides of the periphery of the valve seat; when the electronic expansion valve (20) is in an open valve state, the first through port (41) is connected to the second through port (42); when the electronic expansion valve (20) is in a closed valve state, the first through port (41) is disconnected from the second through port (42).

3. The valve seat according to claim 2, characterized in that: The second flow channel (40) comprises a first through section (43), a mounting section (44) and a second through section (45) which are connected in sequence, a part of the electronic expansion valve (20) is arranged in the mounting section (44) and cooperates with the inner wall of the mounting section (44); the first through port (41) is the opening of the first through section (43), and the second through port (42) is the opening of the second through section (45); wherein the central axis of the first through section (43) is parallel to the central axis of the second through section (45); the central axis of the first through section (43) and the central axis of the second through section (45) are respectively perpendicular to the central axis of the mounting section (44); the electronic expansion valve (20) controls the opening and closing of the second flow channel (40) by lifting and lowering an internal valve needle (21), and the lifting and lowering direction of the valve needle (21) is parallel to the central axis of the mounting section (44).

4. The valve seat according to claim 2, characterized in that: The two ends of the first flow channel (30) are a one-way inlet (31) and a one-way outlet (32), respectively. The one-way outlet (32) and the one-way inlet (31) are respectively arranged on opposite sides of the periphery of the valve seat. One of the one-way inlet (31) and the one-way outlet (32) is located on the same side of the periphery of the valve seat as the second through-port (42), and the other is located on the same side of the periphery of the valve seat as the first through-port (41). When the one-way valve (10) is in an open state, the one-way outlet (32) is connected to the one-way inlet (31), and liquid enters from the one-way inlet (31) and flows out from the one-way outlet (32). When the one-way valve (10) is in a closed state, the one-way outlet (32) is disconnected from the one-way inlet (31).

5. The valve seat according to claim 4, characterized in that: The first flow channel (30) comprises an inlet section (33), an opening and closing section (34) and an outflow section (35) which are connected in sequence; the one-way valve (10) can be movably arranged in the opening and closing section (34) and is limitedly matched with the inner wall of the opening and closing section (34); the one-way inlet (31) is the inlet of the inlet section (33), and the one-way outlet (32) is the outlet of the outflow section (35); wherein the central axis of the inlet section (33), the central axis of the opening and closing section (34) and the central axis of the outflow section (35) are collinear; and the movement direction of the one-way valve (10) is parallel to the central axis of the opening and closing section (34).

6. The valve seat according to claim 5, characterized in that The connection between the opening and closing section (34) and the inlet section (33) is a first valve port (36), and the one-way valve (10) is used to open and close the first valve port (36); the opening and closing section (34) has an expanded diameter portion (341) at one end close to the first valve port (36), and the flow area of ​​the expanded diameter portion (341) is larger than the flow area of ​​the first valve port (36); wherein the inner wall surface of the expanded diameter portion (341) is a conical surface; the opening and closing section (34) also includes a straight tube portion (342) connected to the expanded diameter portion (341), the inner diameter of the straight tube portion (342) is smaller than the inner diameters of the inlet section (33) and the outflow section (35), and the inner wall surface of the straight tube portion (342) is a cylindrical surface.

7. The valve seat according to claim 5, characterized in that The second flow channel (40) comprises a first through section (43), a mounting section (44) and a second through section (45) which are connected in sequence; a portion of the electronic expansion valve (20) is arranged in the mounting section (44) and matches with the inner wall of the mounting section (44); the central axis of the first through section (43) and the central axis of the second through section (45) are respectively parallel to the central axis of the inlet section (33), the central axis of the opening and closing section (34), and the central axis of the outflow section (35).

8. A flow control device, characterized in that: The flow control device is used in a thermal management system to control the flow of a liquid; the flow control device comprises a one-way valve (10), an electronic expansion valve (20) and a valve seat according to any one of claims 1 to 7, the one-way valve (10) being arranged in a first flow channel (30) of the valve seat, and the electronic expansion valve (20) cooperating with a second flow channel (40) of the valve seat.

9. The flow control device according to claim 8, characterized in that: The first flow channel (30) comprises an inlet section (33), an opening and closing section (34) and an outlet section (35) which are connected in sequence, and the connection between the opening and closing section (34) and the inlet section (33) is a first valve port (36); the end of the opening and closing section (34) close to the first valve port (36) has an expanded diameter portion (341); the one-way valve (10) comprises a guide member (11), a piston member (12) and a sealing member (13); one end of the guide member (11) is fixedly arranged, and the other end is The end of the piston member (12) is elastically limited and matched with one end of the piston member (12); the other end of the piston member (12) is arranged toward the first valve port (36); the sealing member (13) is installed on the other end of the piston member (12) and is used to abut and match with the inner wall of the expanded diameter portion (341); the piston member (12) moves along the central axis of the opening and closing section (34) under the guidance of the guide member (11) to drive the sealing member (13) to open and close the first valve port (36).

10. The flow control device according to claim 9, characterized in that: The one-way valve (10) further comprises an elastic member (14); the guide member (11) has a first limiting cavity (111) inside, the piston member (12) has a second limiting cavity (121) inside, a portion of the guide member (11) is located in the second limiting cavity (121) and is slidably limitedly matched with the inner wall of the second limiting cavity (121); a portion of the elastic member (14) is located in the first limiting cavity (111), and the other portion is located in the second limiting cavity (121); the two ends of the elastic member (14) are respectively in contact with the bottom wall of the first limiting cavity (111) and the bottom wall of the second limiting cavity (121), so that the guide member (11) and the piston member (12) are elastically matched.

11. The flow control device according to claim 8, characterized in that: The electronic expansion valve (20) comprises a valve needle (21), a driving screw (22) and a transmission structure (23); the driving screw (22) is connected to the valve needle (21) via the transmission structure (23); the driving screw (22) can rotate relative to the valve needle (21); the driving screw (22) drives the valve needle (21) to move axially by axial movement, so as to control the opening and closing of the electronic expansion valve (20).

12. The flow control device according to claim 11, characterized in that: The electronic expansion valve (20) further comprises a protective shell structure (24) and a mounting seat structure (25); the protective shell structure (24) has a protective cavity (241) inside, and the driving screw (22) and at least a portion of the transmission structure (23) are located in the protective cavity (241); the protective shell structure (24) is fixedly arranged on the mounting seat structure (25); wherein the second flow channel (40) comprises a first through section (43), a mounting section (44) and a second through section (45) which are connected in sequence, and at least a portion of the mounting seat structure (25) is arranged in the mounting section (44).

13. The flow control device according to claim 12, characterized in that: The electronic expansion valve (20) further comprises a sealing body structure (26) and a switch seat structure (27); one end of the sealing body structure (26) along the axial direction of the valve needle (21) is arranged at an end of the mounting seat structure (25) away from the protective shell structure (24), and the interior is communicated with the protective cavity (241); the valve needle (21) is movably arranged on the sealing body structure (26) and is limitedly matched with the inner wall of the sealing body structure (26); the switch seat structure (27) is fixedly arranged on the sealing body structure (26). At the other end along the axial direction of the valve needle (21), the switch seat structure (27) has a valve port flow channel (271) inside, and the two ends of the valve port flow channel (271) are respectively connected to the inside of the sealing body structure (26) and the second passing section (45), wherein the sealing body structure (26) and the switch seat structure (27) are respectively arranged in the mounting section (44); the valve needle (21) controls the connection and disconnection of the first passing section (43) and the second passing section (45) by opening and closing the valve port flow channel (271).

14. The flow control device according to claim 13, characterized in that: A portion of the switch seat structure (27) extends into the interior of the sealing body structure (26), and the portion is the extending section (272), and the extending section (272) is sealed with the inner wall of the sealing body structure (26); the valve port flow channel (271) passes through the extending section (272) to communicate with the interior of the sealing body structure (26); the opening of the valve port flow channel (271) located at the extending section (272) is a conical opening, and the valve needle (21) includes a conduction section (211), a first conical section (212) and a second conical section (213) connected in sequence along the axial direction of the valve needle (21), and the conduction section (211) is connected to the transmission structure (23); wherein, when the valve needle (21) closes the valve port flow channel (271), the outer periphery of the first conical section (212) is sealed with the conical opening, and the second conical section (213) extends into the valve port flow channel (271).

15. The flow control device according to claim 13, characterized in that: The electronic expansion valve (20) further comprises a first sealing ring structure (28), the outer periphery of the first sealing ring structure (28) being sealingly matched with the inner wall of the mounting section (44); wherein the first sealing ring structure (28) is located in a groove formed by the switch seat structure (27) and the sealing body structure (26).

16. The flow control device according to claim 12, characterized in that: The electronic expansion valve (20) further comprises a second sealing ring structure (29), the mounting section (44) comprises a mounting groove (441), and at least a portion of the second sealing ring is arranged in the mounting groove (441); the second sealing ring structure (29) abuts against the mounting seat structure (25) and the bottom wall of the mounting groove (441) at two ends along the axial direction of the valve needle (21) respectively, so as to seal the gap between the mounting groove (441) and the mounting seat structure (25).

17. The flow control device according to claim 12, characterized in that: The electronic expansion valve (20) further comprises an electromagnetic coil structure (291), wherein the electromagnetic coil structure (291) is arranged outside the protective shell structure (24) and is connected to an external power source for driving the driving screw (22) to move axially.

18. A thermal management system, characterized in that: The thermal management system comprises the flow control device according to any one of claims 8 to 17.

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