Pressure reducing valve assembly and vehicle

Abstract

The utility model discloses a pressure reducing valve assembly and a vehicle. The pressure reducing valve assembly comprises a first valve body, a second valve body and a valve element, wherein an air inlet channel is formed in the first valve body; the second valve body is matched with the first valve body; a cavity is formed between the second valve body and the first valve body, and an air outlet channel communicated with the air inlet channel is formed in the second valve body; the valve element is movably arranged in the cavity, and the valve element is suitable for moving under the air pressure effect of the air outlet channel and sealing the air inlet channel; wherein a protruding part protruding towards the interior of the cavity is formed on the second valve body, the air outlet channel is formed in the protruding part, and a groove suitable for avoiding the protruding part is formed in the valve element. According to the pressure reducing valve assembly, the convex part of the second valve body is matched with the groove of the valve element, so that the axial length of the pressure reducing valve assembly is reduced, and the arrangement of the pressure reducing valve assembly is facilitated.

Description

Technical Field

[0001] The utility model relates to the field of vehicles, and in particular to a pressure reducing valve assembly and a vehicle. Background Art

[0002] The on-vehicle hydrogen storage system is an important part of a fuel cell vehicle, and the pressure reducing valve is an indispensable structure in the on-vehicle hydrogen storage system. In the related art, the axial dimension of the pressure reducing valve is relatively large, which is not convenient for assembly in a limited space. Summary of the Utility Model

[0003] The utility model aims to at least solve one of the technical problems existing in the prior art. For this purpose, an object of the utility model is to provide a pressure reducing valve assembly. According to the pressure reducing valve assembly of the utility model, the convex part of the second valve body protrudes towards the cavity and cooperates with the groove of the valve core, reducing the axial length of the pressure reducing valve assembly and facilitating the arrangement of the pressure reducing valve assembly.

[0004] The utility model also provides a vehicle including the above pressure reducing valve assembly.

[0005] The pressure reducing valve assembly according to the utility model includes a first valve body, a second valve body and a valve core. An air inlet passage is formed in the first valve body. The second valve body cooperates with the first valve body, and a cavity is formed between the second valve body and the first valve body. An air outlet passage communicating with the air inlet passage is formed in the second valve body. The valve core is movably arranged in the cavity and is adapted to move under the action of the air pressure in the air outlet passage to close the air inlet passage. Wherein, a convex part protruding towards the inside of the cavity is formed on the second valve body, and the air outlet passage is formed in the convex part. A groove adapted to avoid the convex part is formed on the valve core.

[0006] According to the pressure reducing valve assembly of the utility model, a convex part protruding towards the inside of the cavity is arranged on the second valve body, and the air outlet passage is formed in the convex part. The gas entering the valve core can flow to the downstream of the pressure reducing valve assembly through the air outlet passage in the convex part. A groove adapted to avoid the convex part is formed on the valve core. When the first valve body and the second valve body are assembled, the convex part can be received in the groove. The gas in the valve core can directly enter the air outlet passage without setting additional structures, optimizing the gas flow path. At the same time, compared with the way that the convex part protrudes outwards towards the downstream of the pressure reducing valve assembly, the convex part being received in the groove can reduce the axial length of the valve assembly, reduce the space occupied by the pressure reducing valve assembly, and facilitate the arrangement of the pressure reducing valve assembly.

[0007] According to an embodiment of the present utility model, the second valve body includes: a peripheral wall portion and an end cover. The peripheral wall portion is disposed around the outer periphery of the first valve body, and a cavity is formed inside the peripheral wall portion. The end cover is disposed at one end of the peripheral wall portion away from the first valve body. A convex portion is provided on the side of the end cover facing the cavity, and an outlet of the air outlet channel is formed on the end cover.

[0008] According to an embodiment of the present utility model, the peripheral wall portion and the end cover are configured as an integrally formed part.

[0009] According to an embodiment of the present utility model, the first valve body includes: a valve body base and a spool mating portion. An air inlet channel is formed inside the valve body base. The spool mating portion is disposed on the valve body base and protrudes toward the second valve body. A communication channel is formed inside the spool mating portion, and at least a part of the spool is selectively received in the communication channel.

[0010] According to an embodiment of the present utility model, a mating section extending into the communication channel is formed on the spool. A spool channel communicating the communication channel with the air outlet channel is formed inside the mating section. A valve seat is formed on the communication channel, and the valve seat is adapted to abut against the end of the mating section to close the spool channel.

[0011] According to an embodiment of the present utility model, a stepped portion protruding radially is formed on the inner wall of the communication channel. A ventilation notch is formed on the inner edge of the stepped portion, and the valve seat is disposed on the side of the stepped portion away from the spool.

[0012] According to an embodiment of the present utility model, it further includes: an elastic member, and the elastic member is disposed between the valve body base and the spool.

[0013] According to an embodiment of the present utility model, a mating ring surrounding the outer periphery of the spool mating portion is formed on the valve body base. A limiting groove for accommodating the elastic member is formed at an interval between the mating ring and the spool mating portion, and the second valve body is sleeved on the mating ring.

[0014] According to an embodiment of the present utility model, it further includes: a sealing member and a limiting member. The sealing member is sleeved in the communication channel and sleeved on the outer periphery of the mating section. The limiting member is clamped to the inner wall of the communication channel and abuts against the end of the sealing member to limit the relative movement of the sealing member with respect to the communication channel.

[0015] The vehicle according to the present utility model will be briefly described below.

[0016] A vehicle according to the present utility model includes an on-vehicle hydrogen storage system and the pressure reducing valve assembly in the above embodiment. Since the vehicle according to the present utility model is provided with the pressure reducing valve assembly in the above embodiment, when the pressure reducing valve assembly cooperates with the on-vehicle hydrogen storage system of the vehicle, the cooperation between the groove of the valve core and the convex portion of the second valve body can reduce the axial length of the pressure reducing valve assembly, reduce the space occupied when the on-vehicle hydrogen storage system cooperates with the pressure reducing valve assembly, improve the space utilization rate of the vehicle, and facilitate the layout of other structures of the vehicle.

[0017] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, wherein:

[0019] Figure 1 is a cross-sectional view of a pressure reducing valve assembly according to an embodiment of the present utility model;

[0020] Figure 2 is a structural diagram of a first valve body according to an embodiment of the present utility model;

[0021] Figure 3 is a structural diagram of a second valve body according to an embodiment of the present utility model;

[0022] Figure 4 is a structural diagram of a limiting member according to an embodiment of the present utility model.

[0023] REFERENCE MARKS:

[0024] Pressure reducing valve assembly 1;

[0025] First valve body 11, intake passage 111, valve body base 112, valve core mating portion 113, communication passage 114, step portion 115, ventilation notch 116, mating ring 117, limiting groove 118;

[0026] Second valve body 12, cavity 120, peripheral wall portion 121, end cap 122, outlet passage 123, convex portion 124;

[0027] Valve core 13, groove 131, mating section 132, valve core passage 133;

[0028] Elastic member 14, seal 15, limiting member 16, valve seat 17;

[0029] Card slot 101, deformation notch 102, support platform 103, through hole 104, guide ring 105, cover 106. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation of the present utility model.

[0031] The on-vehicle hydrogen storage system is an important component of a fuel cell vehicle, and the pressure reducing valve is an indispensable structure in the on-vehicle hydrogen storage system. In the related art, the axial dimension of the pressure reducing valve is relatively large, which is not convenient for assembly in a limited space.

[0032] Reference will be made below to Figures 1 - 4 describe the pressure reducing valve assembly according to an embodiment of the present utility model.

[0033] The pressure reducing valve assembly 1 according to the present utility model includes a first valve body 11, a second valve body 12, and a valve core 13. An intake passage 111 is formed in the first valve body 11; the second valve body 12 cooperates with the first valve body 11, a cavity 120 is formed between the second valve body 12 and the first valve body 11, and an outlet passage 123 communicating with the intake passage 111 is formed on the second valve body 12; the valve core 13 is movably disposed in the cavity 120, and the valve core 13 is adapted to move under the action of the air pressure in the outlet passage 123 and close the intake passage 111; wherein, a convex portion 124 protruding toward the inside of the cavity 120 is formed on the second valve body 12, an outlet passage 123 is formed in the convex portion 124, and a groove 131 adapted to avoid the convex portion 124 is formed on the valve core 13.

[0034] According to the pressure reducing valve assembly 1 of the utility model, a first valve body 11 and a second valve body 12 are provided which cooperate with each other. An air inlet channel 111 is formed in the first valve body 11, and a cavity 120 and an air outlet channel 123 which is connected with the air inlet channel 111 are formed between the second valve body 12 and the first valve body 11. When the first valve body 11 and the second valve body 12 are assembled, the air inlet channel 111 and the air outlet channel 123 can be connected through the valve core 13, and the valve core 13 is movably arranged in the cavity 120 to selectively close or conduct the air inlet channel 111. Specifically, the gas can enter the valve core 13 from the air inlet channel 111 of the first valve body 11, and then flow to the downstream pipeline or structure of the pressure reducing valve assembly 1 through the air outlet channel 123. When the air pressure downstream of the pressure reducing valve assembly 1 reaches a preset value, the downstream gas will push the valve core 13 to move in the cavity 120 and close the air inlet channel 111, preventing the gas from continuing to flow into the air outlet channel 123, thereby maintaining the stability of the outlet pressure. The valve core 13 is movably disposed in the cavity 120 and can move under the air pressure of the outlet channel 123 to close the inlet channel 111. This design enables the pressure reducing valve to automatically adjust the opening degree of the inlet channel 111 according to the change of the outlet pressure, thereby achieving precise gas flow and pressure control. The groove 131 on the valve core 13 is designed to cleverly avoid the outlet channel 123, ensuring smooth and unobstructed gas flow.

[0035] The second valve body 12 is provided with a convex portion 124 protruding toward the inside of the cavity 120, and an air outlet channel 123 is formed in the convex portion 124. The gas entering the valve core 13 can flow to the downstream of the pressure reducing valve assembly 1 through the air outlet channel 123 in the convex portion 124. A groove 131 suitable for avoiding the convex portion 124 is formed on the valve core 13. When the first valve body 11 and the second valve body 12 are assembled, the convex portion 124 can be accommodated in the groove 131, and the gas in the valve core 13 can directly enter the air outlet channel 123 without providing an additional structure, thereby optimizing the flow path of the gas. At the same time, compared with the method in which the convex portion 124 protrudes toward the downstream of the pressure reducing valve assembly 1, the convex portion 124 is accommodated in the groove 131, which can reduce the axial length of the valve assembly, reduce the space occupied by the pressure reducing valve assembly 1, and facilitate the arrangement of the pressure reducing valve assembly 1.

[0036] According to one embodiment of the utility model, the second valve body 12 includes: a peripheral wall portion 121 and an end cover 122, the peripheral wall portion 121 is arranged around the outer periphery of the first valve body 11 and a cavity 120 is formed on the inner side of the peripheral wall portion 121; the end cover 122 is arranged at one end of the peripheral wall portion 121 away from the first valve body 11, a convex portion 124 is provided on the side of the end cover 122 facing the cavity 120, and an outlet of the air outlet channel 123 is formed on the end cover 122.

[0037] The tight fit between the peripheral wall portion 121 and the first valve body 11, and the arrangement of the end cap 122 at one end of the peripheral wall portion 121 together form a closed cavity 120 environment, which helps to reduce the risk of gas leakage and improves the sealing performance of the pressure reducing valve assembly 1. A convex portion 124 is provided on the side of the end cap 122 facing the cavity 120. An air outlet channel 123 is formed inside the convex portion 124 and is directly connected to the valve core 13, saving additional connecting parts or pipes. Moreover, the convex portion 124 protruding towards the inside of the cavity 120 can make the convex portion 124 hidden inside the cavity 120, which can reduce the axial length of the second valve body 12, making the entire pressure reducing valve assembly 1 more compact in layout and with higher space utilization rate. At the same time, the presence of the convex portion 124 also optimizes the gas flow path and avoids the phenomenon of air flow disorder and vortex in the valve core 13.

[0038] According to an embodiment of the present invention, the peripheral wall portion 121 and the end cap 122 are configured as an integrally formed part. There is no gap between the integrally formed peripheral wall cloth and the end cap 122, and there is no need to provide an additional seal 15, which improves the sealing performance of the pressure reducing valve assembly 1, reduces the use of parts, and can effectively reduce costs.

[0039] According to an embodiment of the present invention, the first valve body 11 includes: a valve body base 112 and a valve core mating portion 113. An air inlet channel 111 is formed inside the valve body base 112; the valve core mating portion 113 is provided on the valve body base 112 and protrudes towards the second valve body 12. A communication channel 114 is formed inside the valve core mating portion 113, and at least part of the valve core 13 is selectively received in the communication channel 114.

[0040] The valve body base 112 can be connected to the gas supply end. The communication channel 114 provided in the valve core mating portion 113 is connected to the air inlet channel 111. After the gas enters the first valve body 11 through the air inlet channel 111, it can enter the valve core 13 through the communication channel 114. When the first valve body 11 and the second valve body 12 are assembled, the valve core mating portion 113 can be received in the cavity 120, and at least part of the valve core 13 is received in the communication channel 114. Such an arrangement can further reduce the axial length of the pressure reducing valve assembly 1. At the same time, at least part of the valve core 13 being received in the communication channel 114 enables the valve core 13 to change the on or off state of the communication channel 114 through its own movement, realizing the control of the gas flow by the valve core 13.

[0041] According to an embodiment of the present invention, a mating section 132 extending into the communication channel 114 is formed on the valve core 13. A valve core channel 133 connecting the communication channel 114 and the air outlet channel 123 is formed inside the mating section 132. A valve seat 17 is formed on the communication channel 114, and the valve seat 17 is adapted to abut against the end of the mating section 132 to close the valve core channel 133.

[0042] Specifically, a mating section 132 is provided on the valve core 13. The mating section 132 extends into the communication channel 114 and is movable within the communication channel 114. A valve core channel 133 is formed within the mating section 132. After the pressure reducing valve assembly 1 is assembled, the valve core channel 133 connects the communication channel 114 with the air outlet channel 123. After the gas enters the pressure reducing valve assembly 1 through the air inlet channel 111, it can directly enter the communication channel 114 and flow to the air outlet channel 123 after passing through the valve core channel 133. In addition, a valve seat 17 is provided in the communication channel 114 of the pressure reducing valve assembly 1. When the downstream air pressure of the pressure reducing valve assembly 1 reaches a preset value, the downstream gas pushes the valve core 13 to move. At this time, the mating section 132 moves to abut against the valve seat 17 to disconnect the communication between the valve core channel 133 and the communication channel 114, preventing the gas from entering the downstream of the valve body assembly. During this process, the valve core 13 can also adjust the cross-sectional area of the connection between the communication channel 114 and the valve core channel 133 according to requirements, thereby realizing flexible control of the gas flow rate and velocity.

[0043] According to an embodiment of the present invention, a stepped portion 115 protruding radially is formed on the inner wall of the communication channel 114. An air vent notch 116 is formed on the inner edge of the stepped portion 115. The valve seat 17 is arranged on the side of the stepped portion 115 away from the valve core 13. The setting of the air vent notch 116 enables the air inlet channel 111 to be directly connected to the communication channel 114 without the need to provide an additional connecting pipeline, which can reduce costs. As Figure 1 shown, a support platform 103 can be provided on the side of the stepped portion 115 away from the valve core 13. The valve seat 17 can be arranged on the support platform 103. The setting of the support platform 103 can ensure the stability of the assembly of the valve seat 17. The valve core 13 can change the cross-sectional area of the communication path between the communication channel 114 and the valve core channel 133 by changing the distance between the end of the mating section 132 and the valve seat 17. For example, when the end of the mating section 132 abuts against the valve seat 17, the cross-sectional area of the communication path between the communication channel 114 and the valve core channel 133 is 0 at this time, that is, the communication relationship between the valve core channel 133 and the communication channel 114 is disconnected. The existence of the air vent notch 116 enables the gas to continue to flow through the air vent notch 116 when the valve core 13 does not completely close the connection between the communication channel 114 and the valve core channel 133, rather than directly impacting the valve core 13 or generating turbulence, optimizing the air flow path, reducing the air flow resistance, and improving the flow regulation efficiency and stability of the pressure reducing valve assembly 1.

[0044] According to an embodiment of the present utility model, it further includes: an elastic member 14, and the elastic member 14 is disposed between the valve body base 112 and the valve core 13. The elastic member 14 can drive the valve core 13 to reset. Specifically, when the air pressure on the downstream side of the pressure reducing valve assembly 1 reaches a preset value, the gas on the downstream side pushes the valve core 13 towards the first valve body 11, the elastic member 14 is compressed, and the mating section 132 moves to abut against the valve seat 17; at this time, if the air pressure on the downstream side decreases and continuous gas supply is required, the thrust of the gas on the downstream side on the valve core 13 disappears or decreases, and the elastic member 14 separates the mating section 132 from the valve seat 17 through elastic recovery, and the communication channel 114 is communicated with the valve core channel 133, and gas can normally enter the air outlet channel 123 from the air inlet channel 111 to continue to supply gas to the downstream side.

[0045] According to an embodiment of the present utility model, a mating ring 117 surrounding the outer periphery of the valve core mating portion 113 is formed on the valve body base 112, and a limiting groove 118 for accommodating the elastic member 14 is formed at an interval between the mating ring 117 and the valve core mating portion 113, and the second valve body 12 is sleeved on the mating ring 117. As Figure 2 shown, a mating ring 117 is further provided on the valve body base 112, and a limiting groove 118 is defined between the mating ring 117 and the valve core mating portion 113. During assembly, the second valve body 12 is sleeved on the outer periphery of the mating ring 117, and the elastic member 14 is received in the limiting groove 118. The limiting groove 118 can prevent the elastic member 14 from falling off and improve the overall stability of the pressure reducing valve assembly 1.

[0046] According to an embodiment of the present utility model, it further includes: a sealing member 15 and a limiting member 16. The sealing member 15 is sleeved in the communication channel 114 and sleeved on the outer periphery of the mating section 132; the limiting member 16 is clamped on the inner wall of the communication channel 114 and abuts against the end of the sealing member 15 to limit the relative movement of the sealing member 15 with respect to the communication channel 114.

[0047] Since the mating section 132 is disposed in the communication channel 114, therefore, a sealing member 15 needs to be provided between the mating section 132 and the inner wall of the communication channel 114. The sealing member 15 is sleeved on the outer periphery of the mating section 132 and is located in the communication channel 114, which can prevent the gas in the communication channel 114 from flowing out through the gap between the mating section 132 and the inner wall of the communication channel 114, and improve the sealing performance of the pressure reducing valve assembly 1. In addition, a limiting member 16 is further provided in the communication channel 114. The limiting member 16 abuts against the bottom of the sealing member 15 and is clamped with the inner wall of the communication channel 114, which can fix the position of the sealing member 15 and prevent the sealing member 15 from moving when the mating section 132 moves, thereby affecting the sealing effect.

[0048] In some embodiments, a clamping groove 101 for the clamping and limiting member 16 may be provided on the inner wall of the communication channel 114. The cooperation between the limiting member 16 and the clamping groove 101 on the inner wall of the connection channel can achieve the fixation of the limiting member 16.

[0049] In some embodiments, the limiting member 16 may be configured as Figure 4 a snap ring as shown. The snap ring is provided with a deformation notch 102 and two through holes 104 located on both sides of the deformation notch 102. During assembly, the diameter of the snap ring can be adjusted through the through holes 104 to facilitate snapping into the inner wall of the communication channel 114, and the deformation notch 102 facilitates the deformation of the snap ring when adjusting the diameter.

[0050] In some embodiments, a cover body 106 is further provided in the communication channel 114. The cover body 106 is sleeved on at least part of the outer periphery of the fitting section 132 and is located at the end of the communication channel 114 close to the valve core 13 to close the communication channel 114. The bottom of the cover body 106 abuts against the sealing member 15 to limit the axial movement of the sealing member 15.

[0051] In some embodiments, an external thread may be provided on the outer periphery of the cover body 106, and at least part of the inner periphery of the communication channel 114 may be provided with an internal thread. The meshing of the internal thread and the external thread can ensure the stability of the cover body 106.

[0052] In some embodiments, a guide ring 105 may be embedded in the inner periphery of the cover body 106. The guide ring 105 is sleeved on the outer periphery of the fitting section 132. The guide ring 105 can guide the movement of the valve core 13 to prevent the valve core 13 from shifting during movement.

[0053] In some embodiments, a sealing structure and a guiding structure may also be provided between the valve core 13 and the peripheral wall portion 121.

[0054] The vehicle according to the present invention will be briefly described below.

[0055] The vehicle according to the present invention includes an on-vehicle hydrogen storage system and the pressure reducing valve assembly 1 in the above embodiments. Since the vehicle according to the present invention is provided with the pressure reducing valve assembly 1 in the above embodiments, when the pressure reducing valve assembly 1 cooperates with the on-vehicle hydrogen storage system of the vehicle, the groove 131 of the valve core 13 cooperates with the convex portion 124 of the second valve body 12, which can reduce the axial length of the pressure reducing valve assembly 1, reduce the space occupied when the on-vehicle hydrogen storage system cooperates with the pressure reducing valve assembly 1, improve the space utilization rate of the vehicle, and facilitate the arrangement of other structures of the vehicle.

[0056] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0057] In the description of the present utility model, the "first feature" and the "second feature" may include one or more of such features.

[0058] In the description of the present utility model, the meaning of "a plurality of" is two or more.

[0059] In the description of the present utility model, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween.

[0060] In the description of the present utility model, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature.

[0061] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

[0062] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A pressure reducing valve assembly, characterized in that, include: A first valve body (11), wherein an air intake passage (111) is formed in the first valve body (11); a second valve body (12), the second valve body (12) being matched with the first valve body (11), a cavity (120) being formed between the second valve body (12) and the first valve body (11), and an air outlet channel (123) being formed on the second valve body (12) and communicating with the air inlet channel (111); A valve core (13), the valve core (13) is movably arranged in the cavity (120), and the valve core (13) is suitable for moving under the action of the air pressure of the air outlet channel (123) and closing the air inlet channel (111); wherein The second valve body (12) is formed with a convex portion (124) protruding toward the interior of the cavity (120), the air outlet channel (123) is formed in the convex portion (124), and the valve core (13) is formed with a groove (131) suitable for avoiding the convex portion (124).

2. The pressure reducing valve assembly according to claim 1, characterized in that, The second valve body (12) comprises: A peripheral wall portion (121), the peripheral wall portion (121) being arranged around the outer periphery of the first valve body (11) and the cavity (120) being formed inside the peripheral wall portion (121); An end cover (122), wherein the end cover (122) is arranged at an end of the peripheral wall portion (121) away from the first valve body (11), the convex portion (124) is arranged on a side of the end cover (122) facing the cavity (120), and an outlet of the air outlet channel (123) is formed on the end cover (122).

3. The pressure reducing valve assembly according to claim 2, wherein The peripheral wall portion (121) and the end cover (122) are constructed as an integrally formed part.

4. The pressure reducing valve assembly according to claim 1, characterized in that, The first valve body (11) comprises: A valve body base (112), wherein the air inlet passage (111) is formed in the valve body base (112); A valve core (13) mating portion (113), wherein the valve core (13) mating portion (113) is disposed on the valve body base (112) and protrudes toward the second valve body (12), and a connecting passage (114) is formed inside the valve core (13) mating portion (113), and at least a portion of the valve core (13) can be selectively accommodated in the connecting passage (114).

5. The pressure reducing valve assembly according to claim 4, characterized in that The valve core (13) is formed with a fitting section (132) extending into the connecting passage (114); a valve core (13) channel connecting the connecting passage (114) with the air outlet passage (123) is formed in the fitting section (132); a valve seat (17) is formed on the connecting passage (114); the valve seat (17) is suitable for abutting against the end of the fitting section (132) to close the valve core (13) channel.

6. The pressure reducing valve assembly according to claim 5, characterized in that, The inner wall of the communication channel (114) is formed with a radially protruding step portion (115), the inner edge of the step portion (115) is formed with a ventilation notch (116), and the valve seat (17) is arranged on a side of the step portion (115) away from the valve core (13).

7. The pressure reducing valve assembly according to claim 4, wherein Also includes: An elastic member (14), wherein the elastic member (14) is arranged between the valve body base (112) and the valve core (13).

8. The pressure reducing valve assembly according to claim 7, characterized in that A mating ring (117) surrounding the outer circumference of the mating portion (113) of the valve core (13) is formed on the valve body base (112). A limiting groove (118) for accommodating the elastic member (14) is formed at an interval between the mating ring (117) and the mating portion (113) of the valve core (13). The second valve body (12) is sleeved on the mating ring (117).

9. The pressure reducing valve assembly according to claim 5, wherein, Further included are: a seal (15) sleeved and received in the communication channel (114) and sleeved on the outer circumference of the mating section (132); a limiting member (16) clamped to the inner wall of the communication channel (114) and abutting against the end of the seal (15) to limit the movement of the seal (15) relative to the communication channel (114).

10. A vehicle, characterized in that, It includes a pressure reducing valve assembly according to any one of claims 1-9.

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