A matching structure with a pressure sensor and a solenoid valve

Abstract

The present invention proposes a matching structure with a pressure sensor and a solenoid valve, including a solenoid valve body, a pressure sensor body and a limit assembly; the solenoid valve body has an air path cavity, one of the solenoid valve body and the pressure sensor body is provided with a first mounting portion, and the other is provided with a second mounting portion; the limit assembly can switch between a locked state and an unlocked state; in the unlocked state, the second mounting portion is matched with the first mounting portion or separated from the first mounting portion through a rotational movement; in the locked state, the limit assembly locks the second mounting portion rotated into place on the first mounting portion, and the detection channel of the pressure sensor is sealed and connected with the air path cavity. This solution is not only convenient and firm to install, but also the setting of the limit assembly is easy to disassemble, convenient for inspection and maintenance, and at the same time, the pressure sensor integrated in the solenoid valve body can obtain and eliminate the disturbance caused by the solenoid valve to the fuel evaporation system, making the monitoring result more accurate and stable.

Description

Technical Field

[0001] The invention relates to the technical field of vehicle fuel evaporation control, and in particular to a matching structure with a pressure sensor and a solenoid valve. Background Art

[0002] As air pollution becomes increasingly serious, countries around the world are increasingly strictly controlling various pollution sources. Automobiles are the main source of pollutant emissions, and each country is constantly introducing more stringent exhaust emission standards. With the official implementation of the "Light Vehicle Pollutant Emission Limits and Measurement Methods (China Phase 6)", various automotive systems including solenoid valves need to be upgraded and updated accordingly.

[0003] Solenoid valves are industrial equipment controlled by electromagnetics and are basic automation components used to control fluids. In the current diagnosis of automobile fuel evaporation systems, the most commonly used configuration uses a cut-off closed ventilation solenoid valve and a pressure sensor. In the automobile fuel evaporation control system, a closed cavity is formed by closing the solenoid valve, and the pressure difference is measured by the pressure sensor to determine whether there is a leak in the system. In the prior art, the pressure sensor is welded to the solenoid valve to reduce the assembly space.

[0004] However, when inspecting or performing normal maintenance on the vehicle, it is necessary to destroy the welding point between the pressure sensor and the solenoid valve, which makes the disassembly and separation of the pressure sensor and the solenoid valve complicated. Even when destroying the welding point, it is easy to damage the sensor and the solenoid valve. And after the inspection is completed, the pressure sensor needs to be welded to the solenoid valve again. Summary of the invention

[0005] Therefore, the present invention aims to solve the technical problem in the prior art that the pressure sensor is inconvenient to repair after being installed on the solenoid valve, thereby providing a matching structure with a pressure sensor and a solenoid valve.

[0006] The present invention proposes a matching structure with a pressure sensor and a solenoid valve, comprising a solenoid valve body, a pressure sensor body and a limit assembly; the solenoid valve body has an air path cavity, and a first mounting part is provided on one of the solenoid valve body and the pressure sensor body, and a second mounting part is provided on the other; the limit assembly can switch between a locked state and an unlocked state; in the unlocked state, the second mounting part is matched with the first mounting part or separated from the first mounting part through a rotational movement; in the locked state, the limit assembly locks the second mounting part rotated into place on the first mounting part, and the detection channel of the pressure sensor is sealed and connected to the air path cavity.

[0007] Optionally, the first mounting portion includes a receiving cavity, and at least two rotation grooves are recessed on the inner wall of the receiving cavity, wherein the two rotation grooves are symmetrically distributed; the second mounting portion includes a base that can be embedded in the receiving cavity, and at least two fasteners that protrude radially along the rotation circumference of the second mounting portion and are arranged outside the base; in the unlocked state, the base is embedded in the receiving cavity, and the fasteners are embedded in the rotation grooves one by one to rotate or exit the rotation grooves;

[0008] In the locked state, the fastener abuts against the first blocking side wall of the rotation groove along its rotation direction, and along the radial direction of the circumference, a required gap is reserved between the end of the fastener and the bottom of the rotation groove, and the limit assembly locks the fastener on the first blocking side wall; the outer wall of the base and the inner wall of the accommodating cavity are sealed and connected by a sealing member.

[0009] Optionally, a positioning groove is provided on the outer groove wall of the rotating groove along the axial direction of the circumference;

[0010] In the unlocked state, the fasteners are correspondingly embedded in the rotation slot or withdrawn from the rotation slot through the positioning slot.

[0011] Optionally, the positioning groove is a fan-shaped opening that shrinks from the groove bottom of the rotating groove toward its groove opening, and the corresponding fastener is a fan-shaped protrusion that cooperates with the fan-shaped opening.

[0012] Optionally, the rotating groove is an arc-shaped groove that matches the curvature of the fan-shaped protrusion.

[0013] Optionally, at least one of the outer wall of the base and the inner wall of the accommodating cavity is provided with a recessed annular groove, and the sealing member is installed in the annular groove.

[0014] Optionally, in the locked state, the annular groove is distributed closer to the air path cavity than the rotating groove.

[0015] Optionally, the limiting assembly is arranged away from the first mounting portion and the second mounting portion;

[0016] The limit assembly includes a clamping member provided on one outer wall surface of the solenoid valve body and the pressure sensor, and a clamping groove provided on the other outer wall surface;

[0017] When the second mounting portion rotates, one of the clamping member and the clamping slot rotates along with the second mounting portion; in a locked state, the clamping member is inserted into the clamping slot; in an unlocked state, the clamping member exits the clamping slot.

[0018] Optionally, an outer wall surface of the clamping member that is opposite to the bottom of the clamping groove is an arc-shaped guide slope surface along the rotation direction of the second mounting part.

[0019] The present invention further provides a solenoid valve, comprising: a solenoid valve body, a first mounting portion being provided on the solenoid valve body, the first mounting portion being suitable for a second mounting portion on a pressure sensor, the solenoid valve body having an air path cavity, the first mounting portion being provided on one of the solenoid valve body and the pressure sensor, and the second mounting portion being provided on the other;

[0020] The limit assembly can switch between a locked state and an unlocked state; in the unlocked state, the second mounting part is engaged with or separated from the first mounting part through a rotational movement; in the locked state, the limit assembly locks the second mounting part rotated into place on the first mounting part, and the detection channel of the pressure sensor is sealed and connected to the air path cavity.

[0021] The technical solution of the present invention has the following advantages:

[0022] 1. The matching structure of a pressure sensor and a solenoid valve provided by the present invention comprises a solenoid valve body, a pressure sensor body and a limit assembly; the solenoid valve body has an air path cavity, one of the solenoid valve body and the pressure sensor body is provided with a first mounting portion, and the other is provided with a second mounting portion; the limit assembly can switch between a locked state and an unlocked state; in the unlocked state, the second mounting portion is matched with the first mounting portion or separated from the first mounting portion by a rotational movement; in the locked state, the limit assembly locks the second mounting portion rotated into place on the first mounting portion, and the detection channel of the pressure sensor is sealed and connected with the air path cavity. Through the setting of the above technical solution, through the switching of the limit assembly between the locked state and the unlocked state, the pressure sensor is installed on the solenoid valve by a rotational matching method, which is not only convenient and firm to install, but also easy to disassemble, convenient for inspection and maintenance, and at the same time, the pressure sensor is integrated on the solenoid valve body to obtain and eliminate the disturbance caused by the solenoid valve to the fuel evaporation system, so that the monitoring result is more accurate and stable.

[0023] 2. The matching structure with a pressure sensor and a solenoid valve provided by the present invention, wherein the first mounting part includes a accommodating cavity, and at least two rotating grooves are recessed on the inner wall of the accommodating cavity, wherein the two rotating grooves are symmetrically distributed; the second mounting part includes a base that can be embedded in the accommodating cavity, and at least two fasteners radially protruding along the rotating circumference of the second mounting part and arranged outside the base; in an unlocked state, the base is embedded in the accommodating cavity, and the fasteners are embedded in the rotating grooves one by one to rotate or exit the rotating grooves; in a locked state, the fasteners abut against the first blocking side wall of the rotating groove along their rotation direction, and a required gap is reserved between the end of the fastener and the bottom of the rotating groove along the radial direction of the circumference, and the limit assembly locks the fastener on the first blocking side wall; the outer wall of the base and the inner wall of the accommodating cavity are sealed and connected by a sealing member. Through the setting of the above technical solution, on the one hand, the second mounting part can be prevented from falling out in the axial direction, and on the other hand, it is easy to disassemble, convenient for inspection and maintenance. At the same time, the sliding mode of the fastener will not damage the device. The setting of the seal improves the sealing between the first mounting part and the second mounting part, avoids leakage of fuel vapor in the air path cavity, and also makes the pressure sensor body more firmly installed.

[0024] 3. The matching structure with a pressure sensor and a solenoid valve provided by the present invention has a positioning groove on the outer groove wall of the rotating groove along the axial direction of the circumference; in the unlocked state, the fasteners are inserted into or withdrawn from the rotating groove through the positioning groove one by one. The above technical solution is convenient for the fasteners to be positioned and installed in the positioning groove, and then convenient for inserting into or withdrawing from the rotating groove, so that the first mounting part and the second mounting part can be smoothly switched between the locked state and the unlocked state, which is convenient for disassembly, inspection and maintenance.

[0025] 4. In the matching structure of the pressure sensor and the electromagnetic valve provided by the present invention, the positioning groove is a fan-shaped opening that shrinks from the bottom of the rotating groove toward the groove opening, and the corresponding fastener is a fan-shaped protrusion that matches the fan-shaped opening. The above technical solution is provided to facilitate the alignment and matching of the fastener and the positioning groove.

[0026] 5. In the matching structure of the pressure sensor and the solenoid valve provided by the present invention, the rotating groove is an arc-shaped groove that matches the curvature of the fan-shaped protrusion. Through the arrangement of the above technical solution, the arc-shaped groove makes the fastener in the form of a fan-shaped protrusion fit better with the inner wall surface of the rotating groove after being embedded in the rotating groove, thereby improving the firmness and sealing of the installation.

[0027] 6. In the matching structure with a pressure sensor and a solenoid valve provided by the present invention, at least one of the outer wall of the base and the inner wall of the accommodating cavity is provided with a recessed annular groove, and the sealing member is installed in the annular groove. Through the arrangement of the above technical solution, the sealing member is firmly installed, so that the sealing performance between the first mounting part and the second mounting part is improved, and the leakage of fuel vapor in the gas path cavity is avoided.

[0028] 7. In the matching structure with the pressure sensor and the electromagnetic valve provided by the present invention, in the locked state, the annular groove is closer to the air path cavity than the rotating groove. Through the arrangement of the above technical solution, the sealing member is arranged closer to the air path cavity, and the sealing effect is better.

[0029] 8. The matching structure of the pressure sensor and the solenoid valve provided by the present invention, the limit assembly is arranged to avoid the first mounting part and the second mounting part; the limit assembly includes a clamping piece arranged on one outer wall surface of the solenoid valve body and the pressure sensor, and a clamping groove arranged on the other outer wall surface; when the second mounting part rotates, one of the clamping piece and the clamping groove rotates with the second mounting part; in the locked state, the clamping piece is inserted into the clamping groove; in the unlocked state, the clamping piece withdraws from the clamping groove. Through the arrangement of the above technical solution, the clamping piece and the clamping groove are clamped together, so that the pressure sensor body and the solenoid valve body can be further locked, thereby ensuring the firmness of the installation.

[0030] 9. In the matching structure of the pressure sensor and the solenoid valve provided by the present invention, the outer wall surface of the clamping part that is opposite to the bottom of the clamping groove is an arc-shaped guide slope along the rotation direction of the second mounting part. Through the arrangement of the above technical solution, after the pressure sensor body is rotated and mounted to the solenoid valve body, until the clamping part and the clamping groove are in contact, the arc-shaped guide slope can facilitate the clamping part to be easily inserted into the clamping groove, making installation more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 It is a three-dimensional diagram of the matching structure of the pressure sensor and the solenoid valve in the present invention;

[0033] Figure 2It is a cross-sectional view of the matching structure of the pressure sensor and the solenoid valve in the present invention;

[0034] Figure 3 for Figure 1 A schematic diagram of the pressure sensor body;

[0035] Figure 4 for Figure 1 Schematic diagram of the solenoid valve body;

[0036] Figure 5 for Figure 4 The enlarged schematic diagram of point A in the middle;

[0037] Figure 6 for Figure 4 The enlarged schematic diagram of point B in the middle;

[0038] Reference numerals:

[0039] In the figure: 100, a matching structure with a pressure sensor and a solenoid valve; 1, a solenoid valve body; 11, an air inlet; 12, an air outlet; 13, an air path cavity; 14, a first mounting portion; 141, a rotating groove; 1411, a positioning groove; 142, an accommodating cavity; 15, a clamping column; 151, a clamping groove; 16, a sealing member; 2, a pressure sensor body; 21, a second mounting portion; 211, a fastener; 212, a base; 213, an annular groove; 22, a clamping member; 221, an arc-shaped guide slope. DETAILED DESCRIPTION

[0040] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention 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 cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can also be the internal connection of two components, it can be a wireless connection, or it can be a wired connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0044] Example

[0045] Ginseng Figures 1 to 6 As shown in , the present invention provides a matching structure 100 having a pressure sensor and a solenoid valve, comprising a solenoid valve body 1, a pressure sensor body 2 and a limit assembly.

[0046] The solenoid valve body 1 has an air inlet 11 and an air outlet 12, and an air path cavity 13 connecting the air inlet 11 and the air outlet 12. One of the solenoid valve body 1 and the pressure sensor body 2 is provided with a first mounting portion 14, and the other is provided with a second mounting portion 21; the limit assembly can be switched between a locked state and an unlocked state; in the unlocked state, the second mounting portion 21 is matched with the first mounting portion 14 or separated from the first mounting portion 14 by a rotational movement; in the locked state, the limit assembly locks the second mounting portion 21 rotated into place on the first mounting portion 14, and the detection channel of the pressure sensor is sealed and connected with the air path cavity 13. Through the setting of the above technical solution, through the switching of the limit assembly between the locked state and the unlocked state, the pressure sensor is installed on the solenoid valve by a rotational matching method, which is not only convenient and firm to install, but also easy to disassemble, convenient for inspection and maintenance, and at the same time, the pressure sensor is integrated on the solenoid valve body 1 to obtain and eliminate the disturbance caused by the solenoid valve to the fuel evaporation system, so that the monitoring result is more accurate and stable.

[0047] The first mounting portion 14 includes a housing cavity 142, and at least two rotation grooves 141 are recessed on the inner wall of the housing cavity 142, wherein the two rotation grooves 141 are symmetrically distributed; the second mounting portion 21 includes a base 212 that can be embedded in the housing cavity 142, and at least two fasteners 211 that protrude radially along the rotation circumference of the second mounting portion 21 and are disposed outside the base 212; in the unlocked state, the base 212 is embedded in the housing cavity 142, and the fasteners 211 are embedded in the housing cavity 142 one by one. The fastener 211 is inserted into the rotation groove 141 to rotate or exit the rotation groove 141; in the locked state, the fastener 211 abuts against the first blocking side wall of the rotation groove 141 along its rotation direction, and along the radial direction of the circumference, a required gap is reserved between the end of the fastener 211 and the bottom of the rotation groove 141, and the limit assembly locks the fastener 211 on the first blocking side wall; the outer wall of the base 212 and the inner wall of the accommodating cavity 142 are sealed and connected by the seal 16. Through the setting of the above technical solution, on the one hand, the second mounting portion 21 can be prevented from falling out in the axial direction, and on the other hand, it is easy to disassemble, convenient for inspection and maintenance. At the same time, the sliding mode of the fastener 211 will not damage the device. The setting of the seal 16 improves the sealing between the first mounting portion 14 and the second mounting portion 21, avoids the leakage of fuel vapor in the gas path cavity 13, and also makes the pressure sensor body 2 more firmly installed.

[0048] Furthermore, along the axial direction of the circle, a positioning groove 1411 is provided on the outer groove wall of the rotating groove 141; in the unlocked state, the fasteners 211 are embedded in the rotating groove 141 or withdrawn from the rotating groove 141 through the positioning groove 1411 one by one, so that the fasteners 211 are conveniently positioned and installed in the positioning groove 1411, and then conveniently embedded in the rotating groove 141 or withdrawn from the rotating groove 141, so that the first mounting portion 14 and the second mounting portion 21 can be smoothly switched between the locked state and the unlocked state, which is convenient for disassembly, inspection and maintenance.

[0049] The positioning groove 1411 is a fan-shaped opening that shrinks from the bottom of the rotating groove 141 toward its opening, and the corresponding buckle 211 is a fan-shaped protrusion that matches the fan-shaped opening. The above technical solution facilitates the alignment and adaptation of the buckle 211 and the positioning groove 1411.

[0050] The rotating groove 141 is an arc groove matching the curvature of the fan-shaped protrusion. Through the arrangement of the above technical solution, the circular arc groove makes the fastener 211 of the fan-shaped protrusion fit better with the inner wall surface of the rotating groove 141 after being embedded in the rotating groove 141, thereby improving the firmness and sealing of the installation.

[0051] At least one of the outer wall of the base 212 and the inner wall of the accommodating cavity 142 is provided with a recessed annular groove 213, and the sealing member 16 is installed in the annular groove 213. Through the arrangement of the above technical solution, the sealing member 16 is firmly installed, so that the sealing performance between the first mounting portion 14 and the second mounting portion 21 is improved, and the leakage of fuel vapor in the gas path cavity 13 is avoided.

[0052] In the locked state, the annular groove 213 is closer to the gas path cavity 13 than the rotating groove 141, so that the sealing member 16 is arranged closer to the gas path cavity 13, and the sealing effect is better.

[0053] The limit assembly is arranged to avoid the first mounting part 14 and the second mounting part 21; the limit assembly includes a clamping piece 22 arranged on an outer wall surface of one of the solenoid valve body 1 and the pressure sensor, and a clamping groove 151 arranged on the other outer wall surface; when the second mounting part 21 rotates, one of the clamping piece 22 and the clamping groove 151 rotates with the second mounting part 21; in the locked state, the clamping piece 22 is inserted into the clamping groove 151; in the unlocked state, the clamping piece 22 withdraws from the clamping groove 151, and the clamping piece 22 is engaged with the clamping groove 151, so that the pressure sensor body 2 and the solenoid valve body 1 can be further locked, thereby ensuring the firmness of the installation.

[0054] Specifically, in the specific implementation of this embodiment, a clamping column 15 is extended upward from one side of the solenoid valve body 1 close to the pressure sensor body 2 , and the clamping column 15 is provided with the clamping groove 151 so as to be clamped with the clamping member 22 .

[0055] Of course, in other embodiments, the limit assembly may also be two superimposed fixing grooves provided on the outer wall surfaces of the solenoid valve body 1 and the pressure sensor body 2, the inner wall of the fixing groove is provided with threads, and the limit assembly also has a function of passing through the two fixing grooves to unlock or lock the pressure sensor body 2 and the solenoid valve body 1. The purpose of the present invention can also be achieved.

[0056] Preferably, the outer wall surface of the clamping member 22 opposite to the bottom of the clamping groove 151 is an arc-shaped guide slope 221 along the rotation direction of the second mounting portion 21. The arc-shaped guide slope 221 can facilitate the clamping member 22 to be easily inserted into the clamping groove 151, making installation more convenient.

[0057] The present invention further provides a solenoid valve, comprising a solenoid valve body 1, wherein the solenoid valve body 1 is provided with a first mounting portion 14, wherein the first mounting portion 14 is suitable for providing a second mounting portion 21 on a pressure sensor, wherein the solenoid valve body 1 has an air path cavity 13, wherein one of the solenoid valve body 1 and the pressure sensor is provided with the first mounting portion 14, and the other is provided with the second mounting portion 21;

[0058] The limit assembly can be switched between a locked state and an unlocked state; in the unlocked state, the second mounting portion 21 is engaged with or separated from the first mounting portion 14 by a rotational movement; in the locked state, the limit assembly locks the second mounting portion 21 rotated into place on the first mounting portion 14, and the detection channel of the pressure sensor is sealed and connected with the gas path cavity 13. By switching the limit assembly between the locked state and the unlocked state, the pressure sensor is mounted on the solenoid valve by a rotational engagement, which is not only convenient and firm to install, but also easy to disassemble, and convenient for inspection and maintenance. At the same time, the pressure sensor is integrated on the solenoid valve body 1 to obtain and eliminate the disturbance caused by the solenoid valve to the fuel evaporation system, making the monitoring result more accurate and stable.

[0059] In summary, the matching structure 100 with a pressure sensor and a solenoid valve provided by the present invention comprises a solenoid valve body 1, a pressure sensor body 2 and a limit assembly; the solenoid valve body 1 has an air path cavity 13, one of the solenoid valve body 1 and the pressure sensor body 2 is provided with a first mounting portion 14, and the other is provided with a second mounting portion 21; the limit assembly can be switched between a locked state and an unlocked state; in the unlocked state, the second mounting portion 21 is matched with the first mounting portion 14 or separated from the first mounting portion 14 by a rotational movement; in the locked state, the limit assembly locks the second mounting portion 21 rotated into place on the first mounting portion 14, and the detection channel of the pressure sensor is sealed and connected with the air path cavity 13. Through the setting of the above technical solution, through the switching of the limit assembly between the locked state and the unlocked state, the pressure sensor is installed on the solenoid valve by a rotational matching method, which is not only convenient and firm to install, but also easy to disassemble, convenient for inspection and maintenance, and at the same time, the pressure sensor is integrated on the solenoid valve body 1 to obtain and eliminate the disturbance caused by the solenoid valve to the fuel evaporation system, so that the monitoring result is more accurate and stable.

[0060] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A matching structure with a pressure sensor and a solenoid valve, characterized in that: It includes a solenoid valve body, a pressure sensor body and a limit assembly; The solenoid valve body has an air path cavity, one of the solenoid valve body and the pressure sensor body is provided with a first mounting portion, and the other is provided with a second mounting portion; The limiting assembly can be switched between a locked state and an unlocked state; in the unlocked state, the second mounting portion is engaged with the first mounting portion or separated from the first mounting portion through a rotational movement; in the locked state, the limiting assembly locks the second mounting portion rotated into place on the first mounting portion, and the detection channel of the pressure sensor is sealed and connected to the air path cavity; The first mounting portion comprises a receiving cavity, and at least two rotation grooves are recessed on the inner wall of the receiving cavity, wherein the two rotation grooves are symmetrically distributed; The second mounting portion comprises a base portion that can be embedded in the accommodating cavity, and at least two fasteners that protrude radially along the rotational circumference of the second mounting portion and are arranged outside the base portion; In the unlocked state, the base is embedded in the accommodating cavity, and the fasteners are correspondingly embedded in the rotating grooves to rotate or exit the rotating grooves; In the locked state, the fastener abuts against the first blocking side wall of the rotation groove along its rotation direction, and along the radial direction of the circumference, a required gap is reserved between the end of the fastener and the bottom of the rotation groove, and the limit assembly locks the fastener on the first blocking side wall; the outer wall of the base and the inner wall of the accommodating cavity are sealed and connected by a sealing member; The limiting assembly is arranged away from the first mounting portion and the second mounting portion; The limit assembly includes a clamping member provided on one outer wall surface of the solenoid valve body and the pressure sensor, and a clamping groove provided on the other outer wall surface; When the second mounting portion rotates, one of the clamping member and the clamping groove rotates along with the second mounting portion; In the locked state, the clamping member is inserted into the clamping slot; In the unlocked state, the clamping member exits the clamping slot.

2. The matching structure of the pressure sensor and the solenoid valve according to claim 1, characterized in that: A positioning groove is provided on the outer groove wall of the rotating groove along the axial direction of the circumference; In the unlocked state, the fasteners are correspondingly embedded in the rotation slot or withdrawn from the rotation slot through the positioning slot.

3. The matching structure of the pressure sensor and the solenoid valve according to claim 2, characterized in that: The positioning groove is a fan-shaped opening that shrinks from the groove bottom of the rotating groove toward its groove opening, and the corresponding fastener is a fan-shaped protrusion that matches the fan-shaped opening.

4. The matching structure with a pressure sensor and a solenoid valve according to claim 3, characterized in that: The rotating groove is an arc-shaped groove matching the curvature of the fan-shaped protrusion.

5. The matching structure of a pressure sensor and a solenoid valve according to any one of claims 1 to 4, characterized in that: At least one of the outer wall of the base and the inner wall of the accommodating cavity is provided with a recessed annular groove, and the sealing member is installed in the annular groove.

6. The matching structure with a pressure sensor and a solenoid valve according to claim 5, characterized in that: In the locked state, the annular groove is arranged closer to the air path cavity than the rotating groove.

7. The matching structure of the pressure sensor and the solenoid valve according to claim 1, characterized in that: The outer wall surface of the clamping member, which is opposite to the bottom of the clamping groove, is an arc-shaped guiding slope surface along the rotation direction of the second mounting part.

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