Motor-operated valve and assembly method

Abstract

The present invention discloses an electrically operated valve, comprising a first valve body (401) and a second valve body (402), wherein the first valve body (401) and the second valve body (402) are separate structures, the second valve body (402) comprises a first opening (42), the first opening (42) has a mounting chamber (423) that opens toward the housing, at least a portion of a first sensing device (50) is located in the mounting chamber (423), and the second valve body (402) is connected to the housing (10) in a fixed or positionally restricted manner, and when the first sensing device is to be replaced, the first sensing device can be removed by separating the second valve body and the housing, which contributes to simplifying the step of replacing the first sensing device, and a method of assembling the electrically operated valve is also disclosed.

Description

[Technical Field]

[0001] This application claims priority from the following three Chinese patent applications, the entire contents of which are incorporated herein by reference: 1. A Chinese patent application filed with the China Patent Office on September 7, 2022, bearing application number 202211091072.2; 2. A Chinese patent application filed with the China Patent Office on September 7, 2022, bearing application number 202211091093.4; 3. A Chinese patent application filed with the China Patent Office on September 7, 2022, bearing application number 202211091648.5. The present invention relates to the technical field of fluid control, and more particularly to electrically operated valves and methods of assembly. [Background technology]

[0002] In air conditioning systems and thermal management systems, motor-operated valves are often used as throttling elements to improve the accuracy of flow control of the working medium, and a first sensing device for detecting temperature and / or pressure is attached to the motor-operated valve. The first sensing device is electrically connected to the electric control board of the motor-operated valve or directly to an ECU (Electronic Control Unit). If the first sensing device encounters a situation where parameter adjustment or maintenance is required during use, it is necessary to open the housing in which the electrical control board is installed, remove the electrical control board, and then remove the first sensing device, which makes the process of replacing the first sensing device complicated. Summary of the Invention [Problem to be solved by the invention]

[0003] An object of the present invention is to provide a motor-operated valve and an assembly method that contribute to simplifying the replacement step of the first sensing device. [Means for solving the problem]

[0004] In order to achieve the above object, the embodiments of the present invention are as follows. That is, the motor-operated valve includes a first sensing device, a valve body, and a valve member, the valve body including a first valve body and a second valve body, the first valve body and the second valve body having separate structures, the first valve body and the second valve body being fixedly connected or connected so as to have a position restricted or abutting against each other, at least a portion of the valve member being located in the first valve body, the motor-operated valve including a housing, at least a portion of the valve member being located in the housing, the second valve body being fixedly connected to the housing or connected so as to have a position restricted, the second valve body including a first opening, the first opening having a mounting chamber opening toward the housing, at least a portion of the first sensing device being located in the mounting chamber, the motor-operated valve having a first passage and a second passage, the second passage being located in the first valve body, the first passage being located in the second valve body, and the first sensing device being used to detect the temperature and / or pressure of the working medium in the first passage.

[0005] Another embodiment of the present invention discloses an assembly method, which is used to assemble an electrically operated valve, the electrically operated valve including a housing, a valve member, a valve body, a first sensing device, and a control section, the valve body including a first valve body and a second valve body having separate structures, the second valve body including a first opening, the assembly steps being as follows: disposing a part of the first sensing device in an attachment chamber of the first opening; and fixing the first sensing device and the second valve body; When a portion of the valve member is attached to a chamber of the housing, the first valve body is fitted onto the valve member along the axial direction of the valve member, and the positions of the housing and the first valve body are fixed, the valve member is pressed against the first valve body and the housing, The sensor side of the second valve body equipped with the first sensing device faces the housing, and when the second valve body and the housing are assembled, a portion of the first sensing device is located in the housing, and the first sensing device is electrically and / or signal-connected to the control unit.

[0006] The valve body of an embodiment of the present invention includes a first valve body and a second valve body, the first valve body and the second valve body having separate structures, the second valve body including a first opening having an attachment chamber that opens toward the housing, at least a portion of the first sensing device being located in the attachment chamber, and the second valve body being connected to the housing in a fixed or positionally restricted manner, so that when replacing the first sensing device, the first sensing device can be removed by separating the second valve body and the housing, which can contribute to simplifying the replacement step of the first sensing device. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a three-dimensional view of an embodiment of a motor-operated valve. [Figure 2] FIG. 1 is a three-dimensional view of an embodiment of a motor-operated valve. [Figure 3] FIG. 1 is a cross-sectional view of an embodiment of a motor-operated valve. [Figure 4] FIG. 1 is a partially exploded view of an embodiment of a motorized valve. [Figure 5] 1 is a diagram showing a connection structure between a first valve body and a second valve body of an embodiment of a motor-operated valve. FIG. [Figure 6] 1 is a diagram showing a position limiting structure between a first valve body and a second valve body of an embodiment of a motor-operated valve. FIG. [Figure 7] FIG. 2 is a schematic diagram of a first valve body of an embodiment of the motor-operated valve. [Figure 8] FIG. 2 is a schematic diagram of a second valve body of an embodiment of the motor-operated valve. [Figure 9] 4 is a partial enlarged view of a portion A in the embodiment of FIG. 3. [Figure 10]4 is a partially enlarged view of a portion A of another embodiment of FIG. 3. FIG. [Figure 11] FIG. 2 is a schematic diagram of a first sensing device of an embodiment of the motor-operated valve. [Figure 12] 1 is a diagram illustrating a connection structure between a first sensing device and a valve body in one embodiment of a motor-operated valve. FIG. [Figure 13] FIG. 1 is a partially exploded view of an embodiment of a motorized valve. [Figure 14] FIG. 14 is an enlarged view of a portion B in FIG. [Figure 15] FIG. 1 is a partially exploded view of an embodiment of a motorized valve. [Figure 16] FIG. 14 is an enlarged view of a portion C in FIG. [Figure 17] 1 is a diagram showing a connection structure between a position detection device and an electrical connection portion of an embodiment of a motor-operated valve; [Figure 18] FIG. 1 illustrates a partial cross-sectional view of an embodiment of a motorized valve. [Figure 19] FIG. 1 illustrates a partial cross-sectional view of an embodiment of a motorized valve. [Figure 20] FIG. 1 is a three-dimensional view of an embodiment of a motor-operated valve. [Figure 21] FIG. 21 is an enlarged view of a portion D in FIG. 20. [Figure 22] 1 is a structural diagram of an embodiment of a motor-operated valve; DETAILED DESCRIPTION OF THE INVENTION

[0008] The present invention will be further described below in conjunction with the drawings and specific examples.

[0009] Referring to Figures 1, 2 and 3, the electric valve 1 includes a control unit 1a, a valve body 40, a valve member 21 and a stator unit 20, the stator unit 20 is fixed to the control unit 1a, the stator unit 20 is electrically connected and / or signal-connected to the control unit 1a, and the control unit 1a can be electrically connected and / or signal-connected to the outside. The stator unit 20 is fitted onto the outer periphery of the valve member 21 , and the stator unit 20 is fixed to the valve body 40 , with a portion of the valve member 21 located in the valve body 40 . The electric valve 1 further includes a first sensing device 50, which is fixed to the valve body 40, electrically connected and / or signal-connected to the control unit 1a, and is capable of detecting the temperature and / or pressure of the working medium.

[0010] The electric valve 1 includes an inlet 212, an outlet 213, a first passage 41, and a second passage 214, the second passage 214 connecting the inlet 212 and the outlet 213, and along the axial direction of the stator unit 20, the first passage 41 is farther from the stator unit 20 than the inlet 212 and the outlet 213. The valve body 40 includes a first valve body 401 and a second valve body 402, and the inlet 212, the outlet 213, and the second passage 214 are all located in the first valve body 401, the inlet 212 and the outlet 213 are located on two adjacent walls of the first valve body 401, and the first passage 41 is located in the second valve body 402, and the first passage 41 and the second passage 214 do not communicate with each other.

[0011] The first valve body 401 and the second valve body 402 are molded separately, and compared to the integrated valve body 40, the first valve body 401 and the second valve body 402, which are molded separately, have a smaller volume and can be processed and molded using small-volume raw materials, allowing for greater selectivity in raw materials, reducing material waste, and contributing to cost reduction. The material of the first valve body 401 includes a metal material, and the density of the second valve body 402 is smaller than that of the first valve body 401, which can reduce the weight of the motor-operated valve 1, and the lightweight valve body 40 can reduce transportation costs to a certain extent. Specifically, the material of the second valve body 402 may be metal or plastic. In this embodiment, the second valve body 402 includes plastic and is injection molded, which significantly reduces material waste, improves material utilization, and contributes to cost reduction while ensuring the effectiveness of use. Preferably, the material of the second valve body includes PPS, PA66, and the like.

[0012] The axial direction of the stator unit 20 is defined as a reference direction, the valve member 21 is drilled in the first valve body 401 along the reference direction, the second valve body 402 is farther from the valve member 21 than the first valve body 401, and a part of the first sensing device 50 is located in the second valve body 402. In one embodiment, the axial direction of the first sensing device 50 is at an angle with the reference direction, so that the assembly direction of the first valve body 401 and the assembly direction of the second valve body 402 are different. When assembling, the first sensing device 50 is first attached to the second valve body 402, and then the first valve body 401, the second valve body 402, and the control unit 1a are assembled in that order, eliminating the need to attach the first sensing device 50 to the valve body 40 from the electrical control side, simplifying the assembly process, and in this embodiment, the axial direction of the first sensing device 50 is perpendicular to the reference direction. In another embodiment, the axial direction of the first sensing device 50 is parallel to the reference direction, i.e., the mounting direction of the first sensing device 50 is parallel to the mounting direction of the stator unit 20, and this design allows the height of the device in one direction to be reduced to adapt to the needs of different environments.

[0013] The valve member 21 includes a valve body 202 and a rotor unit 203 , and the valve member 21 has a valve port 211 located in a second passage 214 , and the valve body 202 can move and adjust the opening degree of the valve port 211 . The first valve body 401 includes a third opening 4011 , the opening of which faces away from the second valve body 402 , and a portion of the valve member 21 is located in the third opening 4011 .

[0014] The control unit 1 a includes an electric control unit 30 and a housing 10 , the housing 10 having a first chamber 15 in which the electric control unit 30 is located.

[0015] The connection method of the first valve body 401 and the second valve body 402 includes fixed connection, position-limited connection, or abutment. The first valve body 401 and the second valve body 402 may be connected separately, or the first valve body 401 and the second valve body 402 may be connected and then connected to the housing 10 at the same time, which can contribute to improving the stability of the installation of the first valve body 401 and the second valve body 402. Here, several mounting methods are listed. One connection method is a method in which one side of the first valve body 401 abuts against the housing 10, the other side abuts against the second valve body 402, the second valve body 402 is fixed to the housing 10, and the first valve body 401 is abutted by the second valve body 402 and the housing 10 to restrict its position. Another connection method is a method in which the first valve body 401 is fixed to the housing 10, the second valve body 402 is fixed to the housing 10, and the first valve body 401 and the second valve body 402 abut against each other. Yet another connection method is that the first valve body 401 is fixed to the housing 10, the second valve body 402 is fixed to the housing 10, and the first valve body 401 is fixed to the second valve body 402. Of course, the actual installation includes, but is not limited to, the above-mentioned connection methods, as long as it is necessary to achieve a fixing effect.

[0016] Of course, the first valve body 401 and the second valve body 402 may be unconnected and not abutting, and one embodiment includes the first valve body 401 being fixed to the housing 10 and the second valve body 402 being fixed to the housing 10, but with a gap between the first valve body 401 and the second valve body 402. When the first valve body 401 and the second valve body 402 are bonded together, there is still a small gap between them from a microscopic perspective, and external corrosive substances are likely to remain in the small gap, causing corrosion. If the first valve body 401 and the second valve body 402 are not bonded together, the gap between them is large, and the probability of corrosive substances accumulating is greatly reduced. Therefore, the lack of contact between the first valve body 401 and the second valve body 402 can reduce the probability of corrosion. Here, a portion of the valve member 21 is drilled into the first valve body 401 along the reference direction, and the first valve body 401 is pressed by the housing 10 and the second valve body 402 on both sides of the reference direction, respectively, to restrict its position, making it less likely to shift out of position. The above-mentioned fastening is a removable fastening connection method, such as a bolt connection, etc. In this embodiment, the first valve body 401 is fixed to the housing 10, and the second valve body 402 is fixed to the housing 10. Please note that in practice, this connection method includes, but is not limited to, this.

[0017] Referring to Figures 2, 4 and 5, the electric valve 1 includes a first bolt 4023 and a second bolt 4024, and the axial direction of the first sensing device 50 is defined as a first direction, which is perpendicular to the reference direction. The first bolt 4023 is arranged along a first direction, and a portion of it is located in a first hole (not shown) of the housing 10. After passing through the housing 10, the first bolt 4023 has an end that is threadedly connected to the second valve body 402 and is used to fix the second valve body 402 to the housing 10, and the first direction is perpendicular to the axial direction of the stator unit 20. The third bolt 4025 is arranged along the reference direction or the first direction, and a portion of it is located in a second hole (not shown) of the housing 10. After passing through the housing 10, the third bolt 4025 has its end threadedly connected to the first valve body 401 and is used to fix the first valve body 401 to the housing 10. In other embodiments, the first bolt 4023, the second bolt 4024 and the third bolt 4025 may be other parts that can achieve a fixing effect, and the actual use includes but is not limited to the above structures.

[0018] All of the above connection methods can achieve the effect of detachability, allowing the internal parts to be inspected and replaced, contributing to extending the service life of the motor-operated valve 1. Actual use includes, but is not limited to, the above connection methods. In this embodiment, only the fixing method in which the third bolt 4025 connects the housing 10 and the first valve body 401 along the reference direction is shown.

[0019] At least one side of each of the first valve body 401 and the second valve body 402 is abutted against the housing 10 and fixed thereto. The valve body 40 has a lightening groove 407, and in this embodiment, the lightening groove 407 is located along the first direction on the side of the first valve body 401 that abuts against the housing 10, and a direction that is perpendicular to the reference direction and perpendicular to the first direction is defined as a second direction, and the lightening groove 407 is provided to penetrate along the second direction. By providing the lightening groove 407, the protruding portion of the housing 10 toward the first valve body 401 can be retracted, which contributes to reducing the weight of the electric valve 1. Meanwhile, the housing 10 here is formed by integral injection molding using injection molding material, so there is a certain amount of deformation after cooling and molding, which reduces the contact area between the first valve body 401 and the housing 10 and ensures more sufficient contact between the valve body 40 and the housing 10. All of the above connection methods can achieve the effect of detachability, allowing the internal parts to be inspected and replaced, contributing to extending the service life of the motor-operated valve 1. Actual use includes, but is not limited to, the above connection methods.

[0020] 5, 6, 7 and 8, the first valve body 401 includes a first convex portion 403, the first convex portion 403 including a first top wall 403a, the first convex portion 403 being protruded toward the second valve body 402 side from other portions of the first valve body 401, the first top wall 403a being located on the protruding side, the first valve body 401 having a first recess 4031 formed relative to the first convex portion 403, the first recess 4031 including a first bottom wall 4031b. The second valve body 402 includes a second convex portion 404, which includes a second top wall 404a, which is protruded toward the first valve body 401 side from other parts of the second valve body 402, and the second top wall 404a is located on the protruding side, and the second valve body 402 has a second recess 4041 formed in relation to the second convex portion 404, and the second recess 4041 includes a second bottom wall 4041b.

[0021] At least a portion of the first convex portion 403 is located in the second recess 4041, the first top wall 403a and the second bottom wall 4041b abut against each other, at least a portion of the second convex portion 404 is located in the first recess 4031, the second top wall 404a and the first bottom wall 4031b abut against each other, both the first convex portion 403 and the second convex portion 404 include an abutment portion 406, and the abutment portions 406 of both abut against each other. In this embodiment, the contact portion 406 of the first valve body 401 includes at least the first top wall 403 a , the first bottom wall 4031 b , and the wall of the first convex portion 403 facing the second convex portion 404 . The contact portion 406 of the second valve body 402 includes at least the second top wall 404 a , the second bottom wall 4041 b , and the wall of the second protrusion 404 on the side facing the first protrusion 403 .

[0022] The two opposing walls of the first protrusion 403 and the second protrusion 404 can restrict the position of the first protrusion 403 along the second direction. The abutment portions 406 of the first convex portion 403 and the second convex portion 404 abut against each other, which has the effect of restricting their relative positions along the second direction.Next, compared to the first valve body 401 and the second valve body 402 abutting on only one plane, by providing the first convex portion 403 and the second convex portion 404, the flatness requirements for the first valve body 401 and the second valve body 402 can be reduced, and the difficulty of processing can be reduced.

[0023] 6, 7 and 8, the motor-operated valve 1 includes a position limiting component 408 and a position limiting groove 409, the position limiting component 408 and the position limiting groove 409 being located on opposite sides of the first convex portion 403 and the second convex portion 404, at least a portion of the position limiting component 408 being located in the position limiting groove 409, and the position limiting component 408 being able to relatively limit the positions of the first convex portion 403 and the second convex portion 404 along the reference direction. When the position limiting groove 409 is located on the first convex portion 403, the position limiting component 408 is fixedly connected to the second convex portion 404 or is connected to the second convex portion 404 so as to limit the position or is an integral structure; when the position limiting groove 409 is located on the second convex portion 404, the position limiting component 408 is fixedly connected to the first convex portion 403 or is connected to the first convex portion 403 so as to limit the position or is an integral structure; providing the position limiting component 408 can reduce the probability that the first convex portion 403 and the second convex portion 404 will sway in the reference direction. In this embodiment, the position limiting component 408 is a key integrally formed with the first protrusion 403 or the second protrusion 404, and in other embodiments, the above-mentioned connection structure is included, but is not limited to this.

[0024] Both the first protrusion 403 and the second protrusion 404 have connection holes 405, which are provided so as to penetrate through the protrusions. The motor-operated valve 1 includes a second bolt 4024 for fixing the first valve body 401 and the second valve body 402 relative to each other or for fixing the first valve body 401 and the second valve body 402 to another device. The second bolt 4024 is drilled in the connection hole 405 of the first convex portion 403 and the second convex portion 404 along the second direction, and is loosely fitted into at least a portion of the wall of the connection hole 405 of the first convex portion 403 and the second convex portion 404. In this embodiment, the second bolt 4024 includes a bolt, two of which are spaced apart along the first direction and pass through the first convex portion 403 and the second convex portion 404 along the second direction, and the end of the bolt has a threaded portion that passes through the first valve body 401 or the second valve body 402, allowing the entire electric valve 1 to be conveniently fixed to the required components. The provision of the first convex portion 403 and the second convex portion 404 has the effect of conveniently connecting and fixing, and next, the fact that one of the first convex portion 403 and the second convex portion 404 presses the other can contribute to increasing the connection strength.

[0025] When mounting, one side of the first valve body 401 is attached to the housing 10, the first valve body 401 moves along the axial direction of the valve member 21, causing part of the valve member 21 to enter the first valve body 401, and the third bolt 4025 fixes the relative positions of the first valve body 401 and the valve member 21. Then, the first sensing device 50 is installed in the second valve body 402 along the first direction, the second valve body 402 abuts and engages with the housing 10 in the first direction, ensuring that a part of the first sensing device 50 is inserted into the housing 10 and electrically connected to the electrical control unit 30, the second valve body 402 and the first valve body 401 engage and abut with each other, simplifying the difficulty of installing each component, and the first bolt 4023 fixes the relative positions of the second valve body 402 and the housing 10. Here, the positions of the first valve body 401 and the second valve body 402 may be connected via a second bolt 4024 instead of the first bolt 4023 . In this case, the relative positions of the three components, the first valve body 401, the second valve body 402, and the housing 10, are already fixed, and the second bolt 4024 passes through the first convex portion 403 and the second convex portion 404, thereby allowing the entire electric valve 1 to be fixed to other components.

[0026] In order to mount the first sensing device 50, the valve body 40 includes a first opening 42 and a communicating passage (not shown), the first opening 42 has a mounting chamber 423, the first opening 42 has a first opening 421 and a second opening 422 arranged opposite each other, these first opening 421 and second opening 422 being located on both sides of the mounting chamber 423, the first opening 421 being connected to the mounting chamber 423, the second opening 422 being connected to the mounting chamber 423, the first opening 421 facing the electrical control unit 30, the first sensing device 50 being able to be installed from the first opening 421 side, and a portion of the first sensing device 50 being located in the mounting chamber 423. In this embodiment, the first opening 42 is located in the second valve body 402, and the first sensing device 50 includes a temperature sensitive portion 502 and a pressure sensitive portion (not shown), and in other embodiments, it may include only the temperature sensitive portion 502 or only the pressure sensitive portion. The second opening 422 is opposite to the opening direction of the first opening 421, and the chamber formed by the first opening 42 is connected to a communication passage (not shown) via the second opening 422, which is connected to the first passage 41 and is used to detect the temperature and / or pressure of the working medium in the first passage 41.

[0027] Referring to Figures 3, 9 and 11, specifically, the valve body 40 includes a first stage portion 4021 and a second stage portion 4022, and along the axial direction of the first sensing device 50, the first stage portion 4021 is closer to the first passage 41 than the second stage portion 4022, and the wall forming the first opening 42 includes at least a portion of the wall of the first stage portion 4021 and at least a portion of the wall of the second stage portion 4022. The electric valve 11 includes a second sealing part 52, one side of which is abutted against the wall of the first opening 42 and the other side of which is abutted against the wall of the first sensing device 50, and which is used to seal the gap between the first opening 42 and the first sensing device 50, thereby reducing the risk of the working medium leaking from the gap.

[0028] The motor-operated valve 1 includes a second groove portion 54 and a second wall 56 , the second groove portion 54 has a second groove 541 , and at least a portion of the second sealing component 52 is located in the second groove 541 . The wall forming the first opening 42 includes a second wall 56, which is arranged opposite a portion of the wall of the second groove portion 54, one side of the second sealing part 52 abutting against the wall of the second groove portion 54 and the other side abutting against the second wall 56, and the second groove portion 54 and the second wall 56 are positioned between the first stage portion 4021 and the second stage portion 4022 along the second direction. When the second groove portion 54 is located in the first sensing device 50, the second groove portion 54 is recessed in an annular shape relative to the first sensing device 50, and when the second groove portion 54 is located in the second valve body 402, the second groove portion 54 is recessed in an annular shape relative to the second valve body 402. A second groove portion 54 is provided in the first sensing device 50 or the second valve body 402, and a part of the second sealing part 52 is located in the second groove portion 54, which contributes to mounting the second sealing part 52 in advance before mounting the remaining parts, thereby improving the convenience of mounting.

[0029] 9, 11 and 12, the first sensing device 50 includes a boss 57, which is provided to protrude along the radial direction of the first sensing device 50, and along the axial direction of the first sensing device 50, the boss 57 may be annular or non-annular, and the boss 57 may be regular or irregular in shape. The second step portion 4022 includes a second step surface 4022a, and at least a portion of the boss 57 abuts against the second step surface 4022a. The electric valve 1 includes a fixing part 58, which limits the position of the first sensing device 50 along the axial direction of the first sensing device 50 and allows at least a portion of the boss 57 to abut against the wall of the first opening 42, thereby preventing the first sensing device 50 from slipping out. In this embodiment, the fixing part 58 is a bolt, which is drilled into the boss 57 along the second direction, and the end of the bolt includes a threaded segment, which is threadedly connected to the second valve body 402, thereby pressing the first sensing device 50 against the second stage surface 4022a, and at least two bolts are provided. In other embodiments, the fixing part 58 may be a nut, and when the fixing part 58 is a nut, the threaded segment of the nut is located on its outer wall, and the nut is threadedly connected to the wall of the first opening 42, thereby pressing the first sensing device 50 against the second stage surface 4022a. The device can realize quick removal and installation, simplifying the installation steps and improving the convenience of installation and removal. It should be noted that the first sensing device 50 and the surface of the first stage 4021 may be in abutting contact or a loose fit. The fixing part 58 can play the role of fixing the first sensing device 50, and at the same time, the abutment of the first sensing device 50 against the second stage surface 4022a can reduce the probability of leakage of the working medium to a certain extent.

[0030] 9, 10, 13 and 14, the electric valve 1 includes a through-hole portion 131 having a through-hole 131a, the through-hole portion 131 includes at least a portion of a wall forming the through-hole 131a, and at least a portion of the opening of the through-hole 131a faces at least a portion of the opening of the first opening 42, and in this embodiment, at least a portion of the opening of the through-hole 131a is arranged opposite to the first opening 421 of the first opening 42. Along the first direction, a portion of the first sensing device 50 is located in the through-hole 131a. The first sensing device 50 includes a connection portion 501, and the connection portion 501 is located on a side of the first sensing device 50 closer to the electrical control unit 30 along the second direction. The first sensing device 50 is electrically connected to the electrical control unit 30 via the connection portion 501, thereby improving the reliability of the electrical connection between the first sensing device 50 and the electrical control unit 30. In this embodiment, the electrical control unit 30 includes a first circuit board. In this embodiment, the connection portion 501 is a metal dome, and the first sensing device 50 is abutted against a land on the first circuit board via the metal dome, thereby realizing the electrical connection between the first sensing device 50 and the first circuit board. Other embodiments include, but are not limited to, the above structure.

[0031] The electric valve 1 includes an extension portion 132, which extends along the second direction relative to the housing 10 toward the electric control unit 30, and at least a portion of the through-hole portion 131 is located in the extension portion 132. In this embodiment, the extension portion 132 is annular, and the design of the extension portion 132 contributes to increasing the height of the through-hole portion 131 in the second direction, thereby enlarging the sealing path, improving the sealing effect, and reducing the probability of leakage. The motor-operated valve 1 includes a first sealing part 52, which is further from the first passage 41 than the second sealing part 52 along the second direction. In one embodiment, the first sealing part 52 abuts against the housing 10 on one side and against the first sensing device 50 on the other side. In this embodiment, the first sealing part 51 is abutted against the wall that forms the through-hole portion 131; specifically, at least a portion of the through-hole portion 131 is molded into the extension portion 132, at least a portion of one side of the first sealing part 51 is abutted against the wall of the extension portion 132, and one side of the first sealing part 51 is abutted against the wall of the first sensing device 50 and is used to seal the gap between the through-hole portion 131 and the first sensing device 50, thereby reducing the probability that water vapor or the like will enter the electrical control unit 30 through the gap. In other embodiments, the abutment position between the first sealing part 52 and the housing 10 includes the wall of the through hole portion 131, but is not limited to this, and the side wall of the housing 10 closer to the second valve body 402 may also be part of the sealing surface.

[0032] The sealing method of the first sealing part 51 includes at least two embodiments, and in one embodiment, the sealing surface formed by the through-hole portion 131 relative to the first sealing part 51 along the radial direction of the first sensing device 50 is located on the outer periphery of the first sealing part 51. Along the radial direction of the first sensing device 50, one side of the first sealing component 51 abuts against the wall that forms the through-hole portion 131, and the other side abuts against the first sensing device 50. The first sealing component 51 can be mounted on the first sensing device 50 in advance, making it difficult for the first sealing component 51 to fall off or be improperly mounted, and ensuring the sealing effect of the first sealing component 51.

[0033] In another embodiment, the through-hole portion 131 includes a step portion (not shown) and a step wall 131b, and in this embodiment, the step portion is annular and protrudes toward the axis of the through-hole portion 131 relative to the through-hole portion 131, and the step wall 131b is located in the step portion (not shown), and the step wall 131b is farther from the electrical control unit 30 than the step portion. Along the axial direction of the first sensing device 50, the first sealing part 51 is located between the step wall 131b and the first sensing device 50, and one side of the first sealing part 51 abuts against the step wall 131b and the other side abuts against the first sensing device 50. Along the axial direction of the first sensing device 50, the first sealing part 51 is located between the first sensing device 50 and the step wall 131b, and the hole diameter forming the through hole 131a of the through hole portion 131 can be reduced while the need for processing accuracy for the through hole 131a can be reduced.

[0034] The housing 10 further includes a rib portion 133 closer to the electrical control unit 30 than the bottom wall 151, the housing 10 includes a side wall 152, the wall forming the first chamber 15 includes at least a portion of the side wall 152, and the rib portion 133 is connected on one side to the extension portion 132 and on the other side to the side wall 152. In this embodiment, the rib portion 133 functions as a reinforcing rib, and the design of the rib portion 133 contributes to improving the strength of the extension portion 132 and reducing the probability of deformation of the extension portion 132. Other embodiments include, but are not limited to, the above structures. The electric valve 1 includes a positioning portion 134 that is fixedly connected to or has an integral structure with the extension portion 132 and / or the rib portion 133, and in this embodiment, the positioning portion 134 is injection molded integrally with the extension portion 132 and / or the rib portion 133. The electric control unit 30 has a positioning hole 135, a part of the positioning portion 134 is positioned in the positioning hole 135, and the positioning portion 134 is connected to the electric control unit 30 in a fixed manner or in a positionally limited manner. The positioning portion 134 here serves to guide and assist the positioning of the electric control unit 30, and contributes to improving the stability of the installation of the electric control unit 30. The connection method between the positioning portion 134 and the electric control unit 30 includes welding, riveting, etc., and in practice includes the above connection methods, but is not limited to these.

[0035] Referring to Figures 3, 9 and 14, the electric valve 1 includes a first groove portion 53 and a first wall 55, the first groove portion 53 has a first groove 531, at least a portion of the first sealing part 51 is located in the first groove 531, the wall forming the through hole portion 131 includes a first wall 55 arranged opposite to a portion of the wall of the first groove portion 53, and one side of the first sealing part 51 abuts against the wall of the first groove portion 53 and the other side abuts against the first wall 55. The first groove portion 53 is located in the first sensing device 50 or the housing 10 , and at least a portion of the first sealing component 51 is located in the first groove 531 . When the first groove portion 53 is located in the first sensing device 50, the first groove portion 53 is recessed in an annular shape relative to the first sensing device 50, and when the first groove portion 53 is located in the housing 10, the first groove portion 53 is recessed in an annular shape relative to the housing 10. In this embodiment, when the first groove portion 53 is located in the housing 10, at least a portion of the first groove portion 53 is located in the extension portion 132, the first groove portion 53 is provided in the first sensing device 50 or the extension portion 132, and at least a portion of the first sealing component 51 is located in the chamber formed by the first groove portion 53, which contributes to mounting the first sealing component 51 in advance before mounting the remaining components, thereby improving the convenience of mounting.

[0036] The wall forming the first chamber 15 includes at least a portion of the bottom wall 151 that is closer to the valve body 40 than the electric control unit 30, the electric control unit 30 being located on the side of the extension portion 132 that is farther from the valve body 40, the extension portion 132 including an abutment wall 132a that is located on the side of the extension portion 132 that is farther from the second valve body 402, the abutment wall 132a being closer to the electric control unit 30 than the bottom wall 151 and forming a structure that protrudes inward relative to the first chamber 15, the abutment wall 132a including at least a portion of the wall that surrounds the periphery of the through-hole portion 131 and may include more walls of the housing 10, at least a portion of the electric control unit 30 abuts against the abutment wall 132a, and after the two are abutted, the positioning portion 134 is fixed to the electric control unit 30, contributing to stable installation of the electric control unit 30.

[0037] 14 to 21, the housing 10 has a second chamber 16, which is located on at least one side of the outer periphery of the valve member 21 along the radial direction of the valve member 21, and the second chamber 16 is provided in communication with the first chamber 15. The electric valve 1 includes a position detection device 60 and an electrical connection part 70, and the first connection part 71 is electrically connected and / or signal-connected to the position detection device 60 via the second connection part 72, and the position detection device 60 can sense the rotation of the rotor unit 203 to form a feedback signal, and the electrical control part 30 can collect the feedback signal to determine the operating state of the electric valve 1. In this embodiment, the second connection part 72 includes a second circuit board, and the position detection device 60 can be electrically connected to the electrical control unit 30 via the second circuit board. The position detection device 60 is attached to the second chamber 16 via an electrical connection 70, the walls forming the second chamber 16 include a bottom wall of the second chamber 16, at least a portion of the rotor unit 203 is located on one side of the bottom wall of the second chamber 16, the position detection device 60 is located on the other side of the bottom wall of the second chamber 16, and the position detection device 60 is closer to the first connecting part 71 than the bottom wall of the second chamber 16. The position detection device 60 is located below the outer periphery of the rotor unit 203, i.e., the position detection device 60 is closer to the valve body 40 than the stator unit 20, and is used to detect the rotation speed of the rotor unit 203. When the position detection device 60 is provided on the lower outer periphery of the rotor unit 203, the overall height of the housing 10 can be reduced compared to when the position detection device 60 is provided on the upper outer periphery of the rotor unit 203, while the detection accuracy of the position detection device 60 can be improved.

[0038] The electrical connection portion 70 includes a first connection part 71 and a second connection part 72, the first connection part 71 includes a fixing portion 711, the housing 10 includes a first engagement portion 101, the fixing portion 711 and the first engagement portion 101 are engaged and connected to each other, the wall forming the second chamber 16 includes at least a portion of the wall of the first engagement portion 101, and the first engagement portion 101 can limit the movement of the fixing portion 711 along the axial direction of the stator unit 20. The housing 10 has an insertion opening 712 that communicates with the second chamber 16 and opens toward the electrical control unit 30, and the first connecting part 71 can be engaged and connected to the housing 10 along the opening direction of the insertion opening 712. The first connecting part 71 and the housing 10 are connected by an engagement connection method, which has the effect of facilitating attachment and detachment, and also provides relatively good connection stability.

[0039] The housing 10 includes a first surface 101a, and the wall that forms the second chamber 16 includes the first surface 101a and a part of the wall of the first engagement portion 101. The first engagement portion 101 is protruding from the first surface 101a, the fixing portion 711 is recessed from the wall of the first connecting part 71, and along the opening direction of the insertion port 712, the chamber formed by the fixing portion 711 is connected to the first chamber 15, and at least a portion of the first engagement portion 101 is located in the chamber formed by the fixing portion 711, or the first engagement portion 101 is recessed from the first surface 101a, the fixing portion 711 is protruding from the wall of the first connecting part 71, and at least a portion of the fixing portion 711 is located in the chamber formed by the first engagement portion 101. The structure of the fixing portion 711 and the first engaging portion 101 not only achieves the effect of position restriction, but also has the effect of facilitating processing.

[0040] The fixing portion 711 and the first engaging portion 101 are loosely fitted or intermediately fitted, and along the first direction, the fixing portion 711 and the first engaging portion 101 can be slip-fitted and engaged with each other. The engagement connection here means that the first engagement portion 101 can restrict the fixed portion 711 from moving in a direction other than the sliding direction between them. The first connecting part 71 includes at least two fixing portions 711, which are located on two opposing walls of the first connecting part 71, and the first engaging portions 101 are also located on opposing sides of the first surface 101a. Here, providing two or more sets of fixing portions 711 increases the contact area between the fixing portions 711 and the first engagement portion 101, increasing the friction between them and improving the strength of the attachment; on the other hand, since multiple fixing portions 711 are provided, the degree of engagement with the first engagement portion 101 is higher, improving the stability of the attachment. The drawings of this embodiment only show an engagement format in which the fixing portion 711 is recessed and the first engagement portion 101 is protruded, and in actual use, the engagement format includes, but is not limited to, the above-mentioned engagement format.

[0041] The housing 10 includes a second fixing portion 102, which is protruded relative to the engagement portion 101 to form a position limiting step 1021, and the first connecting part 71 includes a second engagement portion 713, which is engaged and connected to the second fixing portion 102, and the second fixing portion 102 can limit the movement of the second engagement portion 713 along the opening direction of the insertion opening 712. The first connecting part 71 includes a position limiting wall 1021a, which is farther from the electrical control unit 30 than the fixed part 711, the opening direction of the insertion port 712 is the engaging connection direction, and the position limiting wall 1021a abuts against the wall of the position limiting stage 1021 to realize position limiting. The mutual engagement connection between the second engagement portion 713 and the second fixing portion 102 can restrict the position of the first connecting part 102 along the opening direction of the insertion port 712, improving the stability of the installation of the position detection device 60 and thereby improving the accuracy of flow control.

[0042] When mounting the position detection device 60, a portion of the electrical connection part 70 to which the position detection device 60 is attached is inserted into the second chamber 16, and the first connection part 71 is inserted into the second chamber 16 until the fixing part 711 and the first engagement part 101 engage with each other and the position limiting wall 1021a of the first connection part 71 abuts the wall of the position limiting stage 1021, i.e., the installation is complete, and the electrical connection part 70 is similarly position-limited along the opening direction of the insertion port 712, thereby improving the stability of the installation of the position detection device 60 and thereby improving the detection accuracy. In this embodiment, the position detection device 60 here is a position sensor, and here a Hall sensor is used, and the rotation speed of the rotor unit 203 can be detected.

[0043] The position detection device 60 includes a first pin portion 601 and a first positioning portion 602, the first pin portion 601 is electrically connected to a second connecting component 72, the second connecting component 72 includes a first positioning hole 721, at least a portion of the first positioning portion 602 is located in the first positioning hole 721, and the first positioning portion 602 is welded and fixed to the second connecting component 72, the first connecting component 71 includes a second pin portion 714 and a second positioning portion 715, the second pin portion 714 is electrically connected to the second connecting component 72, the second connecting component 72 includes a second positioning hole 722, at least a portion of the second positioning portion 715 is located in the second positioning hole 722, and the second positioning portion 715 is welded and fixed to the second connecting component 72. The first positioning portion 602 and the second positioning portion 715 are drilled in the second connecting part 72 and are used to connect and fix the position detection device 60 to the second connecting part 72, and the second connecting part 72 to the first connecting part 71, thereby improving the strength of the connection. In this embodiment, the first pin portion 601 and the second pin portion 714 are pins, the first positioning portion 602 is welded and fixed to the second connecting part 72, and the second positioning portion 715 is welded and fixed to the second connecting part 72; in other embodiments, other fixing methods may be used, for example, electrical connection can be achieved by conductive adhesive or the like.

[0044] 17, 18 and 22, the first connecting part 71 includes a third pin portion 716, at least a portion of which is located in the first chamber 15, and the third pin portion 716 is electrically connected to the electrical control unit 30. The stator unit 20 also includes a fourth pin portion 201, a portion of which is drilled in the housing 10, and one end of this fourth pin portion 201 is electrically connected to the stator unit 20 and the other end is electrically connected to the electrical control unit 30. The electric valve 1 further includes a connection port portion 80, which includes a fifth pin portion 81, one end of which is electrically connected to the electrical control unit 30 and the other end of which is located at the connection port portion 80 and is used for electrical connection to the outside. In this embodiment, the third pin portion 716, the fourth pin portion 201, and the fifth pin portion 81 are pins.

[0045] When installing the position detection device 60, the position detection device 60, the first connecting part 71 and the second connecting part 72 are first assembled in advance, that is, the first pin portion 601 is fixed after being electrically connected to the second connecting part 72, and the second pin portion 714 is fixed after being electrically connected to the second connecting part 72. The assembled components are engaged and connected to the housing 10 to secure it, ensuring that the position detection device 60 is positioned in the second chamber 16. Next, the electrical control unit 30 is assembled, ensuring that its connection holes are aligned with components such as the third pin portion 716, the fourth pin portion 201, and the fifth pin portion 81. The electrical control unit 30 is secured after being electrically connected to components such as the third pin portion 716, the fourth pin portion 201, and the fifth pin portion 81, and the housing 10 is then assembled.

[0046] The position detection device 60 completes its connection with the electrical control unit 30 via the electrical connection part 70 and is engaged and connected to the housing 10, thereby improving the stability of the position detection device 60 and improving the detection accuracy of the position detection device 60. On the other hand, by assembling the position detection device 60 and the electrical connection part 70 in advance and by having the electrical connection part 70 have a stable engaging and connection structure, the position of the third pin part 716 is fixed, and when the electrical control unit 30 is installed, the accuracy of the connection between the third pin part 716 and the electrical control unit 30 can be improved, and the installation efficiency of the position detection device 60 can be improved.

[0047] An assembly method is used to assemble an electrically operated valve 1, the electrically operated valve 1 including a housing 10, a valve member 21, a valve body 40, and a first sensing device 50, the valve body 40 including a first valve body 401 and a second valve body 402 that are separately molded, the second valve body 402 including a first opening 42, and the assembly steps are as follows: A portion of the first sensing device 50 is disposed in the first opening 42, and the first sensing device 50 and the second valve body 402 are fixed in place; When a part of the valve member 21 is attached to the chamber of the housing 10, and the first valve body 401 is fitted onto the valve member 21 along the axial direction of the valve member 21, and the positions of the housing 10 and the first valve body 401 are fixed, the valve member 21 is pressed against the first valve body 401 and the housing 10, The sensor side of the second valve body 402 equipped with the first sensing device 50 faces the housing 10, and when the second valve body 402 and the housing 10 are assembled, a portion of the first sensing device 50 is located in the housing 10, and the first sensing device 50 is electrically and / or signal-connected to the electrical control unit 30 in the housing 10.

[0048] The assembly direction of the first valve body 401 and the assembly direction of the second valve body 402 are different. When assembling, the first sensing device 50 is first attached to the second valve body 402, and then the first valve body 401, the second valve body 402, and the control unit 1a are assembled in that order, eliminating the need to attach the first sensing device 50 to the valve body 40 from the electrical control side, simplifying the assembly process.

[0049] It is to be noted that the above examples are used only to illustrate the present invention, rather than to limit the present invention. Although the present specification has already described the present invention in detail with reference to the above examples, as can be understood by those skilled in the art, they may still make amendments or equivalent substitutions to the present invention, and any improvements that do not deviate from the spirit and scope of the present invention should be included within the scope of the claims of the present invention. [Explanation of symbols]

[0050] 1···Motor-operated valve; 1a···Control section; 10 ···Housing; 101 ···First engagement portion; 101a...first page; 102...Second fixed part; 1021 ···Position restriction stage; 1021a ···Position limiting wall; 131 ···Through hole section; 131a...through hole; 131b ···Step wall; 132...extension; 132a...Abutment wall; 133 ···Rib section; 134 ···Positioning section; 135 ···Locating hole; 15...1st room; 151 ···Bottom wall; 152...side wall; 16...2nd room; 20 ··· stator unit; 201 ···Fourth pin part; 202 ···Valve body; 203 ···Rotor unit; 21 ···Valve member; 211 ···valve orifice; 212...Entrance; 213...exit; 214...2nd aisle; 30 ···Electrical control section; 40 ···Valve body; 401 ···First valve body; 4011 ···Third opening; 402 ···Second valve body; 4021 ···First stage; 4022 ···Second stage; 4022a ···Second stage surface; 4023 ···First bolt; 4024 ···Second bolt; 4025 ···Third bolt; 403 ···First convex part; 403a ···First top wall; 4031 ···First recess; 4031b ···First bottom wall; 404 ···Second convex part; 404a...Second top wall; 4041 ···Second recess; 4041b...Second bottom wall; 405 ···Connection hole; 406...Abutment part; 407 ···Lightening groove; 408 ···Position limiting parts; 409 ···Position limiting groove; 41...1st aisle; 42 ···First opening; 421 ···First opening; 422 ···Second opening; 423 ···Mounting chamber; 50 ···First sensing device; 501 ···Connection; 502 ···Sensing unit; 51...first sealing part; 52...Second sealing part; 53 ···First groove section; 531...1st groove; 54 ···Second groove section; 541...2nd groove; 55...1st wall; 56...Second wall; 57 ···Boss; 58 ···Fixed parts; 60 ···Position detection device; 601 ···First pin part; 602 ···First positioning unit; 70 ···Electrical connections; 71 ···First connecting part; 711...Fixed part; 712 ···insertion slot; 713 ···Second engagement portion; 714 ···Second pin part; 715 ···Second positioning section; 716 ···Third pin part; 72 ···Second connecting part; 721 ···First positioning hole; 722 ···Second positioning hole; 80 ···Connection port; 81 ···5th pin part.

Claims

1. An electrically operated valve (1), a first sensing device (50), a valve body (40), and a valve member (21); The valve body (40) includes a first valve body (401) and a second valve body (402), The first valve body (401) and the second valve body (402) are separate structures, The first valve body (401) and the second valve body (402) are fixedly connected or connected or abutted to each other so as to be positionally limited; At least a portion of the valve member (21) is located in the first valve body (401); The motor-operated valve (1) includes a housing (10), At least a portion of the valve member (21) is located in the housing (10); The second valve body (402) is fixedly or positionally limitedly connected to the housing (10); The second valve body (402) includes a first opening (42); The first opening (42) has an attachment chamber (423) that opens toward the housing (10), At least a portion of the first sensing device (50) is located in the mounting chamber (423); The motor-operated valve (1) has a first passage (41) and a second passage (214), The second passage (214) is located in the first valve body (401); The first passage (41) is located in the second valve body (402); The motor-operated valve (1) is characterized in that the first sensing device (50) is used to detect the temperature and / or pressure of the working medium in the first passage (41).

2. The material of the first valve body (401) includes a metal material, 2. The motor-operated valve (1) according to claim 1, wherein the density of the second valve body (402) is less than the density of the first valve body (401).

3. The material of the second valve body (402) includes plastic, 3. The electrically operated valve (1) according to claim 1 or claim 2, characterized in that the second valve body (402) is injection molded.

4. The housing (10) includes a through-hole portion (131) having a through-hole (131a), At least a portion of the first sensing device (50) is located in the through hole (131a), 4. The motor-operated valve (1) according to claim 3, wherein an angle is formed between an axial direction of the first sensing device (50) and an axial direction of the valve member (21).

5. The motor-operated valve (1) includes a first bolt (4023) and a third bolt (4025), The first bolt (4023) is provided along a first direction, and a portion of the first bolt (4023) is located in a first hole of the housing (10), The first bolt (4023) has an end threadedly connected to the second valve body (402) and is used to fix the second valve body (402) to the housing (10); the first direction is perpendicular to the axial direction of the valve member (21), and / or the third bolt (4025) is provided along the first direction or the axial direction of the valve member (21), and a portion of the third bolt (4025) is located in a second hole of the housing (10); The electric valve (1) according to claim 4, characterized in that the third bolt (4025) has an end threadedly connected to the first valve body (401) and is used to fix the first valve body (401) to the housing (10).

6. The first valve body (401) includes a first protrusion (403), The first protrusion (403) is provided so as to protrude toward the second valve body (402) from other portions of the first valve body (401), The second valve body (402) includes a second protrusion (404), The second protrusion (404) is provided so as to protrude toward the first valve body (401) side from other portions of the second valve body (402), At least a part of the first convex portion (403) and the second convex portion (404) abuts against each other, The second protrusion (404) can restrict the position of the first protrusion (403) along a second direction, The second direction is perpendicular to the axial direction of the valve member (21), 6. The electrically operated valve (1) according to claim 5, characterized in that the second direction is perpendicular to the first direction.

7. The electric valve (1) includes a position limiting element (408) and a position limiting groove (409); The position limiting component (408) and the position limiting groove (409) are located on the opposing sides of the first convex portion (403) and the second convex portion (404), At least a portion of the position limiting component (408) is located in the position limiting groove (409); The position limiting component (408) is capable of limiting the relative positions of the first convex portion (403) and the second convex portion (404) along the axial direction of the valve member (21), When the position limiting groove (409) is located on the first convex portion (403), the position limiting part (408) is fixedly connected to the second convex portion (404), or is connected to the second convex portion (404) so ​​as to be position limited, or is an integral structure; The electric valve (1) described in claim 6, characterized in that when the position limiting groove (409) is located in the second convex portion (404), the position limiting part (408) is fixedly connected to the first convex portion (403), connected to be position-limited, or has an integral structure.

8. The electric valve (1) according to claim 6 or claim 7, characterized in that the valve body (40) has a lightening groove (407) located on the side of the first valve body (401) that abuts against the housing (10) and extending through the valve body (40) along the second direction.

9. The motor-operated valve (1) includes a stator unit (20) and a control unit (1a), The stator unit (20) is located in the housing (10), The motor-operated valve (1) has a valve port (211), The stator unit (20) is capable of controlling the operation of at least a part of the valve member (21) so as to adjust the opening degree of the valve port (211); The stator unit (20) is electrically and / or signal-connected to the control unit (1a), The electric valve (1) according to any one of claims 4 to 8, characterized in that the first sensing device (50) is electrically connected and / or signal-wise connected to the control unit (1a).

10. The motor-operated valve (1) according to claim 9, characterized in that the motor-operated valve (1) includes a first sealing part (51) abutting on one side against the housing (10) and on the other side against the first sensing device (50).

11. an electrical control unit (30); The electrically operated valve (1) further includes a position detection device (60) and an electrical connection (70); The electrical connection portion (70) includes a first connection part (71) and a second connection part (72), The first connection part (71) is electrically connected to the electrical control part (30), The second connection part (72) is electrically connected to the position detection device (60) and the first connection part (71); The second connecting part (72) is connected to the first connecting part (71) in a fixed or positionally limited manner, The first connecting part (71) includes a first fixing portion (711), The housing (10) includes a first engagement portion (101), The motor-operated valve (1) according to claim 9 or 10, characterized in that the first fixed portion (711) is connected to the first engagement portion (101) in a fixed manner or in a positionally limited manner.

12. An assembly method used to assemble an electrically operated valve (1), comprising the steps of: The motor-operated valve (1) includes a housing (10), a valve member (21), a valve body (40), a first sensing device (50), and a control unit (1a), The valve body (40) includes a first valve body (401) and a second valve body (402) that are separate bodies. The second valve body (402) includes a first opening (42); The assembly steps are as follows: disposing a portion of the first sensing device (50) in the mounting chamber (423) of the first opening (42); fixing the first sensing device (50) and the second valve body (402); attaching a portion of the valve member (21) to the chamber of the housing (10); fitting the first valve body (401) to the valve member (21) along the axial direction of the valve member (21); and fixing the positions of the housing (10) and the first valve body (401), the valve member (21) is pressed against the first valve body (401) and the housing (10). The sensor side of the second valve body (402) equipped with the first sensing device (50) faces the housing (10); When assembling the second valve body (402) and the housing (10), a part of the first sensing device (50) is located in the housing (10), and the first sensing device (50) is electrically and / or signal-connected to the control unit (1a).

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