CN111503312B

CN111503312B - Valve assembly and method of manufacturing the same

Info

Publication number: CN111503312B
Application number: CN201910096304.5A
Authority: CN
Inventors: 不公告发明人
Original assignee: Hangzhou Sanhua Research Institute Co Ltd
Current assignee: Hangzhou Sanhua Research Institute Co Ltd
Priority date: 2019-01-31
Filing date: 2019-01-31
Publication date: 2022-08-19
Anticipated expiration: 2039-01-31
Also published as: CN111503312A

Abstract

The utility model provides a valve module, includes circuit portion, stator module, valve body, case subassembly and sensor, and circuit portion includes box body and circuit board, and the box body forms the box inner chamber, and the circuit board is located the box inner chamber, and the sensor is connected with the circuit board electricity, and stator module includes first contact pin, and the sensor includes the second contact pin, and first contact pin and second contact pin all stretch into the box inner chamber, first contact pin and circuit board swing joint, valve module still include third contact pin, third contact pin and box body fixed connection. Therefore, the stress damage of the accumulated error of the assembly dimension chain to the electric connection part of the stator assembly and the circuit board is weakened in the assembly process, and the service life of the valve assembly is prolonged. The invention also provides a manufacturing method of the valve component for weakening the stress damage of the accumulated error of the assembly dimension chain to the electric connection part of the stator component and the circuit board, and the reliability of the assembly of the valve component is improved.

Description

Valve assembly and method of manufacturing the same

[ technical field ] A method for producing a semiconductor device

The invention relates to the technical field of fluid control, in particular to a valve assembly and a manufacturing method thereof.

[ background of the invention ]

The valve component is mainly applied to a refrigerating system and comprises a circuit part, a stator component, a valve core component, a valve body and a sensor, wherein the circuit part comprises a box body and a circuit board, the circuit board is electrically connected with the sensor, and a contact pin of the stator component is electrically connected with the circuit board. During the assembly process, the cumulative error of the assembly dimension chain has certain stress damage at the electric connection part of the circuit board, which is very bad for the service life of the valve component. How to weaken this stress damage is a technical problem at this time; in addition, a manufacturing method for a valve assembly aiming at attenuating such stress damage is also a technical problem.

[ summary of the invention ]

The invention aims to provide a valve assembly which is beneficial to weakening the stress damage of the accumulated error of an assembly dimension chain to the electric connection part of a stator assembly and a circuit board.

Another object of the present invention is to provide a method for manufacturing a valve assembly, which is beneficial to reduce the stress damage of the accumulated error of the assembly dimension chain to the electrical connection part of the stator assembly and the circuit board, and improve the reliability of the assembly of the valve assembly.

The invention provides an implementation mode: a valve component comprises a circuit part, a valve body, a valve core component, a stator component and a sensor, wherein the valve core component is fixedly connected with the valve body, the sensor is fixedly connected with the valve body, the circuit part comprises a box body and a circuit board, the box body forms a box body inner cavity, the circuit board is positioned in the inner cavity of the box body, the sensor is electrically connected with the circuit board, the stator assembly comprises a first contact pin, the sensor comprises a second contact pin, the first contact pin and the second contact pin both extend into the inner cavity of the box body, the first contact pin is movably connected with the circuit board, the valve component also comprises a third contact pin which is fixedly connected with the box body, the first end of the third contact pin extends into the inner cavity of the box body, the first end of the third contact pin is fixedly connected with the circuit board, and at least part of the second end of the third contact pin is used for being electrically connected with the outside.

In order to achieve the above object, the present invention provides a method of manufacturing a valve assembly, wherein the valve assembly includes a circuit part, a stator assembly, a valve body, a spool assembly, and a sensor, the circuit part includes a case body and a circuit board, the case body includes an upper case and a lower case, the method of manufacturing the valve assembly includes the steps of:

a1, fixedly connecting the valve core assembly with the valve body;

a2, fixedly connecting the sensor with the valve body;

a3, the stator assembly comprises a first contact pin, the sensor comprises a second contact pin, the first contact pin and the second contact pin both extend into the inner cavity of the box body, and the first contact pin is movably connected with the circuit board;

a4, fixing the assembly formed in the step a3 on a support, and fixedly connecting the assembly formed by assembling the support with the step a1 and the step a2 with the valve body by using a first screw assembly;

a5, and welding and fixing the upper shell and the lower shell.

According to one technical scheme, the valve assembly comprises a circuit part, a valve body, a valve core assembly, a stator assembly and a sensor, wherein the circuit part comprises a box body and a circuit board, the stator assembly comprises a first contact pin, and the first contact pin is movably connected with the circuit board. Therefore, stress damage to the electric connection part of the stator assembly and the circuit board caused by the accumulated error of the assembly size chain is weakened in the assembly process, and the service life of the valve assembly is prolonged.

A manufacturing method of the valve assembly comprises the steps of mounting the valve core assembly on a valve body, mounting a sensor on the valve body, wherein the stator assembly comprises a first contact pin, and movably connecting the first contact pin with a circuit board. Therefore, the stress damage of the accumulated error of the assembly dimension chain to the electric connection part of the stator assembly and the circuit board is weakened, and the assembling reliability of the valve assembly is improved.

[ description of the drawings ]

FIG. 1 is a front view schematic of an embodiment of the valve assembly of the present invention;

FIG. 2 is a first cross-sectional schematic view of a first embodiment of the valve assembly of FIG. 1;

FIG. 3 is a second cross-sectional schematic view of the first embodiment of the valve assembly of FIG. 1;

FIG. 4 is a third cross-sectional schematic view of the first embodiment of the valve assembly of FIG. 1;

FIG. 5 is a schematic perspective view of one orientation of the valve assembly of FIG. 1;

FIG. 6 is a schematic perspective view of the valve assembly of FIG. 1 in another orientation;

FIG. 7 is a schematic perspective view of one direction of the valve body of FIG. 1;

FIG. 8 is a schematic diagram of a right side view of the circuit board of FIG. 2;

FIG. 9 is a schematic perspective view of one direction of the circuit board of FIG. 2;

FIG. 10 is a cross-sectional schematic view of a second embodiment of the valve assembly of FIG. 1;

FIG. 11 is an enlarged view of a portion of the structure of FIG. 10;

FIG. 12 is a schematic perspective view of one direction of the lower housing of FIG. 10;

FIG. 13 is a right side elevational view of the lower housing illustrated in FIG. 10;

FIG. 14 is a perspective view in one direction of the first embodiment of the stator assembly of FIG. 10;

FIG. 15 is a perspective view of the first embodiment of the stator assembly and the can of FIG. 10;

FIG. 16 is a schematic perspective view of one orientation of the sensor of FIG. 10;

FIG. 17 is a perspective view in one direction of the second embodiment of the stator assembly of FIG. 10;

FIG. 18 is a perspective view of the second embodiment of the stator assembly of FIG. 10 mated to the can;

FIG. 19 is a cross-sectional schematic view of a fourth embodiment of the valve assembly of FIG. 1;

FIG. 20 is a perspective view of one orientation of the lower housing of FIG. 19;

FIG. 21 is a schematic perspective view of one orientation of the seal cap of FIG. 19;

FIG. 22 is a schematic diagram of a right side view of a circuit board of the fifth embodiment of the valve assembly of FIG. 1;

FIG. 23 is a schematic view of a circuit board in one orientation in a fifth embodiment of the valve assembly of FIG. 1;

FIG. 24 is a schematic perspective view of a sixth embodiment of the valve assembly of FIG. 1;

FIG. 25 is a schematic perspective view of one orientation of the circuit board of FIG. 24;

FIG. 26 is a cross-sectional schematic view of a seventh embodiment of the valve assembly of FIG. 1;

FIG. 27 is a schematic perspective view of one direction of the circuit board of FIG. 26;

FIG. 28 is a cross-sectional view of a first pin of the stator assembly and circuit board flex connection scheme of the seventh embodiment of the valve assembly of FIG. 1;

FIG. 29 is a cross-sectional schematic view of a stator assembly to cassette snap-fit arrangement of the seventh embodiment of the valve assembly of FIG. 1;

FIG. 30 is a cross-sectional schematic view of the eighth embodiment of the valve assembly of FIG. 1;

fig. 31 is a schematic perspective view of one direction of the circuit board of fig. 30;

FIG. 32 is a cross-sectional schematic view of a first pin and circuit board flex connection arrangement of the stator assembly of the eighth embodiment of the valve assembly of FIG. 1;

FIG. 33 is a cross-sectional view of the stator assembly to cassette snap-fit arrangement of the eighth embodiment of the valve assembly of FIG. 1;

FIG. 34 is a first schematic illustration of a manufacturing process for the valve assembly of FIG. 2;

FIG. 35 is a second schematic illustration of a manufacturing process for the valve assembly of FIG. 2;

[ detailed description ] A

The invention will be further described with reference to the following figures and specific examples:

referring to fig. 1 and 2, the valve assembly 100 includes a circuit portion 1, a stator assembly 2, a valve body 3, a valve core assembly 4, and a sensor 5, the circuit portion 1 includes a box body 11 and a circuit board 12, the box body 11 forms a box inner cavity 10, the circuit board 12 is located in the box inner cavity 10, the stator assembly 2 includes an injection molded body 22, the injection molded body 22 and the box body 11 may be integrally injection molded, of course, the injection molded body 22 and the box body 11 may be formed in a split structure, when the injection molded body 22 and the box body 11 are formed in a split structure, the injection molded body 22 and the box body 11 may be connected in a clamping manner, and of course, the connection may be achieved in other manners. The circuit board 12 is electrically connected with the stator assembly 2, the sensor 5 is electrically connected with the circuit board 12, and the electrical connection position of the sensor 5 and the circuit board 12 can be rigid connection or flexible connection. The valve core assembly 4 is fixedly connected with the valve body 3, in the embodiment, the valve core assembly 4 is fixedly connected with the valve body 3 through a compression nut 101, and the valve core assembly 4 can be directly connected with the valve body 3 through threads or fixedly connected through other forms; the sensor 5 is fixedly connected with the valve body 3, in this embodiment, the sensor 5 is fixedly connected with the valve body 3 through the limiting member 102 and the second screw assembly 8, and of course, the sensor 5 may also be fixedly connected with the valve body 3 through a compression nut or the sensor is directly connected with the valve body 3 through a screw thread. The box body 11 comprises an upper shell 111 and a lower shell 112, the upper shell 111 and the lower shell 112 are hermetically connected, in this embodiment, the upper shell 111 and the lower shell 112 are welded and fixed, the valve component 100 further comprises a third pin 13, and the lower shell 112 and the third pin 13 are fixed by injection molding; the lower housing 112 is connected to the sensor 5 in a sealing manner, in this embodiment, the sensor 5 and the lower housing 1122 are sealed by welding, but the sensor and the lower housing may also be sealed by an O-ring. The box body 11 forms a box body inner cavity 10, the circuit board 12 is located in the box body inner cavity 10, and part of the sensor 5 is located in the box body inner cavity 10. The valve assembly 100 further includes a support member 6 and a first screw assembly 7, the stator assembly 4 is fixedly connected to the support member 6, and the support member 6 is fixedly connected to the valve body 3 by the first screw assembly 7.

With reference to fig. 3, 4, 5, 6 and 7, the valve body 3 includes a first inlet 31, a first outlet 33, a first channel 35 and a first mounting portion 36, the valve core assembly 4 is fixedly connected to the first mounting portion 36, the first mounting portion 36 has a first cavity 360, at least a portion of the valve core assembly 4 is disposed in the first cavity 360, the first cavity 360 is communicated with the first channel 35, the first channel 35 is formed between the first inlet 31 and the first outlet 33, the valve body 3 further includes a second inlet 32, a second outlet 34, a second channel 37 and a second mounting portion 38, the sensor 5 is fixedly connected to the second mounting portion 38, the second mounting portion 38 has a second cavity 380, the second cavity 380 is communicated with the second channel 37, the second channel 37 is formed between the second inlet 32 and the second outlet 34, and the first channel 35 is not communicated with the second channel 37. The first inlet 31 and the second outlet 34 are located on the same side of the valve body 3, the second inlet 32 and the first outlet 33 are located on the same side of the valve body 3, the opening of the first cavity 360 and the opening of the second cavity 380 are located on the same side of the valve body 20, and the three sides are different sides of the valve body, so that interference is avoided, miniaturization of the valve body is facilitated, and the utilization rate of the valve body is improved.

With reference to fig. 2, 3, 4 and 7, the valve assembly 100 includes a gland nut 101 and a third seal 1003, the third seal 1003 is disposed in the first cavity 360, the valve core assembly 4 is disposed in the first mounting portion 36 of the valve body 3, and the third seal 1003 is pressed and deformed by the valve core assembly 4 and the valve body 3. The compression nut 101 is threadedly engaged with the threaded portion 361 of the first mounting portion 36 of the valve body 3 about the outer periphery of the valve core assembly 4, and the compression nut 101 at least limits axial movement of the valve core assembly 4 relative to the valve body 3 along the valve core assembly 4. The valve core assembly 4 comprises a valve seat 41, a valve core 42, a rotor assembly 43, a connecting piece 44 and a sleeve 45, wherein the valve seat 41 is fixedly arranged relative to the valve body 3, the rotor assembly 43 and the valve core 42 are assembled inside the sleeve 45, the sleeve 45 and the connecting piece 44 are welded and fixed, the valve seat 41 is provided with a valve port 441, the valve core 42 moves relative to the valve seat 41 and controls the opening degree of the valve port 411, and the circuit part 1 controls the valve core 42 to move by controlling the stator assembly 2 and the rotor assembly 43.

Referring to fig. 4, 9 and 16, the sensor 5 includes a sensing head 51, a body 52 and a second pin 53, the sensing head 51 is fixedly disposed on the body 52, the second pin 53 is disposed to expose one end of the body 52, the second pin 53 extends into the inner cavity 10 of the case, the second pin 53 is inserted into a fourth pin hole 124 formed on the circuit board 12, and the second pin 53 is fixedly soldered to the circuit board 12, so that the circuit board 12 is electrically connected to the sensor 5; the sensing head 51 is disposed at the other end of the body 52, and the sensing head 51 is located in the second channel 37 or the second cavity 380 directly connected to the second channel 37. Wherein the sensor 5 is a temperature sensor and/or a pressure sensor such that the sensor 5 can detect the temperature or the pressure or the temperature and/or the pressure of the refrigerant or the working medium in the second channel 37 and/or the second chamber 380. One end of the body 52 passes through the second through hole 1123 and is disposed in the inner cavity 10 of the case, and the other end of the body 52 passes through the second through hole 1123 and is fixedly connected with the valve body 3. Referring to fig. 2 and 7, the valve assembly 100 includes a stopper 102, a second screw assembly 8 and a fourth seal 1004, the fourth seal 1004 is disposed in the second chamber 380, the sensor 5 is mounted on the second mounting portion 38 of the valve body 3, the sensor 5 is disposed at least partially in the second chamber 380, the stopper 102 is fitted around the outer periphery of the sensor 5, the second screw assembly 8 is screwed to the second screw hole 301 of the valve body 3 through a first screw hole 1021 formed in the stopper 102, the fourth seal 1004 is deformed by the sensor 5 and the valve body 3, and the stopper 102 at least restricts the axial movement of the sensor 5 relative to the valve body 3 along the sensor 5. The sensor 5 is welded and fixed to the periphery of the second through hole 1123, and the welding method is not limited, and may be ultrasonic welding, laser welding, or another welding method.

With reference to fig. 2, 8 and 9, the stator assembly 2 includes a first pin 21, the first pin 21 extends into the inner cavity 10 of the casing, and the first pin 21 is movably connected to the circuit board 12. This is beneficial to reduce stress damage to the electrical connection of the stator assembly 2 to the circuit board 12 from assembly dimensional chain stack-up errors. Specifically, in this embodiment, the circuit portion 1 has the first protruding portions 14 with a number greater than 1, the first protruding portions 14 are disposed side by side, the first protruding portions 14 are located on one side of the circuit board 12, the first protruding portions 14 are fixedly connected to the circuit board 12, the first protruding portions 14 are electrically connected to the lines of the circuit board 12, the first protruding portions 14 are disposed side by side on the lower end portion 120 of the circuit board 12, the first protruding portions 14 are formed with first pin holes 142, and each first pin 21 is at least partially in contact with and electrically connected to each first protruding portion 14.

Referring to fig. 2 and 9, the valve assembly 100 further includes a third pin 13, and the third pin 13 is fixedly connected with the box body 11, and specifically, the third pin 13 is injection-molded and fixed with the lower housing 112. The first end 131 of the third pin 13 extends into the inner cavity 10 of the box body, the first end of the third pin 13 is fixedly connected with the circuit board 12, and at least part of the second end 132 of the third pin 13 is used for electrically connecting with the outside. In this embodiment, the circuit board 12 further includes a third pin hole 123, the first end 131 of the third pin 13 is inserted into the third pin hole 123, the first end 131 of the third pin 13 is soldered to the circuit board 12, and the circuit board 12 is connected to an external power source through the third pin 13.

Fig. 34 and 35 are schematic views illustrating a manufacturing process of the valve assembly of the first embodiment, and a manufacturing method of the valve assembly 100 is further described with reference to the schematic views of fig. 1 to 33. The valve assembly 100 includes a circuit part 1, a stator assembly 2, a valve body 3, a spool assembly 4 and a sensor 5, the circuit part 1 includes a case 11 and a circuit board 12, the case 11 includes an upper case 111 and a lower case 112, and the manufacturing method of the valve assembly 100 includes the steps of:

a1, fixedly connecting the valve core assembly 4 with the valve body 3;

a2, fixedly connecting the sensor 5 with the valve body 3;

a3, the stator assembly 2 comprises a first pin 21, the first pin 21 extends into the box inner cavity 10, and the first pin 21 is movably connected with the circuit board 12;

a4, fixing the assembly formed in the step a3 on the support member 6, and fixedly connecting the assembly formed by assembling the support member 6 with the step a1 and the step a2 with the valve body 3 by using a first screw assembly 7;

a5, the upper case 111 and the lower case 112 are fixed by welding.

The above sequence of steps a1, a2 and a3 is adjustable, step a4 follows steps a1, a2 and a3, and step a5 follows step a 4.

Step a1 further comprises placing a third seal 1003 within a first cavity 360 formed in the first mounting portion 36 of the valve body 3; placing the valve core assembly 4 in the first installation portion 36 of the valve body 3, placing at least part of the valve core assembly 4 in the first cavity 360, and extruding and deforming the third sealing member 1003 by the valve core assembly 4 and the valve body 3; the compression nut 101 is fitted around the outer periphery of the valve core assembly 4, and the compression nut 101 is screwed with the threaded portion 361 of the first mounting portion 36 of the valve body 3, and the compression nut 101 at least restricts movement of the valve core assembly 4 relative to the valve body 3 in the axial direction of the valve core assembly 4. Before the step a1, assembling the valve core assembly 4, where the valve core assembly 4 includes a valve seat 41, a valve core 42, a rotor assembly 43, a connector 44, and a sleeve 45, assembling the rotor assembly 43 and the valve core 42 inside the sleeve 45, welding and fixing the sleeve 45 and the connector 44, and welding and fixing the valve seat 41 and the connector 44.

Step a2 further includes positioning a fourth seal 1004 within a second cavity 380 formed in the second mounting portion 38 of the valve body 3; placing the sensor 5 on the second mounting part 38 of the valve body 3, placing the sensor 5 at least partially in the second cavity 380 formed by the second mounting part 38, and pressing the fourth sealing member 1004 against the valve body 3 by the sensor 5; the limiting member 102 is sleeved on the outer periphery of the sensor 5, the second screw assembly 8 is threaded with the second screw hole 301 of the valve body 3 through the first screw hole 1021 formed in the limiting member 102, and the limiting member 102 and the second screw assembly 8 cooperate to at least limit the movement of the sensor 5 relative to the valve body 3 along the axial direction of the sensor 5.

In step a3, the circuit part 1 includes first protruding parts 14, the first protruding parts 14 are arranged side by side, the first protruding parts 14 are located on one side of the circuit board 12, the first protruding parts 14 are fixedly connected to the circuit board 12, the first protruding parts 14 are electrically connected to the lines of the circuit board 12, the first protruding parts 14 are arranged side by side on the lower end surface 120 of the circuit board 12, the first protruding parts 14 are formed with first pin holes 141, the first pins 21 are inserted into the first pin holes 141 formed by the first protruding parts 14, and each first pin 21 is at least partially in contact with and electrically connected to each first protruding part 14. In addition, step a3 includes electrically connecting the circuit board 12 to the third pin 13 molded in the lower housing 112, inserting the first end 131 of the third pin 13 into the third pin hole 123 formed in the circuit board 12, and then soldering the first end 131 of the third pin 13 to the circuit board 12, wherein the circuit board 12 is connected to an external power source through at least a portion of the second end 132 of the third pin 13, and transmits the temperature and pressure signals detected by the sensor 5, and receives the operation command, the opening information of the feedback valve, and the like.

Step a4, electrically connecting the circuit board 12 with the sensor 5, wherein the sensor 5 has a second pin 53, inserting the second pin 53 into a fourth pin hole 124 formed on the circuit board 12, and in this embodiment, soldering the second pin 53 to the circuit board 12; the sensor 5 is welded and fixed to the outer periphery of the second through hole 1123.

The valve assembly manufactured in the way has larger freedom of design of an assembly process because the assembly steps of the valve core assembly and the sensor are not limited.

Fig. 10 to 16 are schematic structural views of a second embodiment of the valve assembly 100, and compared with the first embodiment, the main differences are that: referring to fig. 10, 12 and 13, in the present embodiment, the stator assembly 2 and the box 11 are formed separately, and the stator assembly 2 is engaged with the box 11. The case 11 includes an upper case 111 and a lower case 112, the lower case 112 includes a bottom portion 1121, a first side wall portion 1122, and a first locking portion 113, the first locking portion 113 is formed on the first side wall portion 1122, the first side wall portion 1122 and the upper case 111 are hermetically connected, and in this embodiment, the first side wall portion 1122 and the upper case 111 are fixed by ultrasonic welding. With reference to fig. 10, 12, and 16, the sensor 5 further includes a step portion 54, the step portion 54 has a step surface 541 formed, the outer side surface of the lower housing bottom 1121 abuts against the step surface 541, and the step portion 54 supports the lower housing 112. The step part 54 of the sensor 5 and the outer side of the bottom 1121 of the lower housing are welded to form a seal, so that external impurities or media can be prevented from entering the inner cavity 10 of the box body, and the service performance of the valve assembly is improved. Referring to fig. 11 and 14, the stator assembly 2 has a first pin 21, and the first pin 21 is electrically connected to the circuit board 12. Stator module 2 includes body 231 and second locking portion 232, second locking portion 232 is located body 231 periphery, at least part of stator module 2 passes the hole that first locking portion 113 formed and gets into box inner chamber 10, stator module 2 constructs with box 11 alone, stator module 2 passes through first locking portion 113 and second locking portion 232 joint with box 11, first locking portion 113 and second locking portion 232 have certain clearance after the joint, like this in the assembly process, this clearance can weaken assembly dimension chain accumulative error to the stress damage of lower casing 112 and sensor 5 sealing connection department, the life of valve module has been improved.

Referring to fig. 12, 13, 14 and 15, the first locking portion 113 includes a first body portion 1131, a second protrusion 1132 and a first through hole 1133, the first body portion 1131 is formed by protruding from the first side wall portion 1122, the protruding direction of the first body portion 1131 is perpendicular to the extending direction of the first side wall portion 1122, the first through hole 1133 penetrates the first side wall portion 1122 and the first body portion 1131 and communicates with the box inner cavity 10, the second protrusion 1132 is formed on the first body portion 1131 and extends toward the first through hole, the second protrusion 1132 is disposed in the first through hole 1133, and the second locking portion 142 is snapped into the second protrusion 1132 through the first through hole 1133. The second locking portion 232 includes a projection 2321 and a third projection 2322, the body 231 has a second side wall 2311, the projection 2321 projects from at least part of the second side wall 2311, the projection 2321 projects in a direction orthogonal to the axial extension direction of the body 231, the third projection 2322 projects from one end face of the projection 2321 in the projection direction of the projection 2321, the third projection 2322 has a recess 2323, and the recess 2323 is recessed from one end face of the third projection 2322 in a direction parallel to the axis of the body 231. Referring to fig. 11, the first locking portion 113 and the second locking portion 232 are clamped with the second protrusion 1132 through the recess 2323, wherein the recess 2323 is clamped with the second protrusion 1132 to have a certain clearance, and the clearance can compensate the accumulated error of the assembly dimension chain of the valve assembly in the radial direction, thereby weakening the stress damage of the accumulated error of the assembly dimension chain to the welding seal of the lower housing 112 and the sensor 5.

Referring to fig. 11 and 13, the first side wall portion 1122 has a first annular groove 1126, the first annular groove 1126 is located outside the first side wall portion 1122, and the first annular groove 1126 is provided around the first through hole 1133 and communicates with the first through hole 1133. The valve assembly 100 includes a first seal 1001, the first seal 1001 is disposed in the first annular groove 1126, and the first seal 1001 is deformed by the boss 2321 pressing against the first sidewall portion 1122 of the lower housing 112.

Referring to fig. 17 and 18, in the third embodiment, the third protrusion 2322 may be provided as a recess 2323, and a clamping portion 2324 may also be provided, the clamping portion 2324 is formed by protruding from one end face of the third protrusion 2322 in a direction parallel to the axis of the body portion 231, the first locking portion 113 and the second locking portion 232 are clamped with the second protrusion 1132 through the clamping portion 2324, wherein the clamping portion 2324 and the second protrusion 1132 have a certain gap after being clamped, and the gap can compensate the accumulated assembly dimension chain error of the valve assembly in the radial direction, thereby weakening the stress damage of the welded seal between the lower housing 112 and the sensor 5 caused by the accumulated assembly dimension chain error.

The main difference between the manufacturing method of the valve assembly 100 in the present embodiment and the manufacturing method of the valve assembly in the first embodiment is that: step a3 includes disposing the first sealing member 1001 in the first annular groove 1126, and then clamping the stator assembly to the lower housing 112, wherein the first sealing member 1001 is extruded and deformed by the stator assembly 2 and the lower housing 112 after the stator assembly 2 is clamped to the lower housing 112.

Fig. 19, 20 and 21 are schematic structural diagrams of a fourth embodiment of the valve assembly 100, and compared with the first embodiment, the main difference is that: the lower case 112 includes a fourth protrusion 1124 formed to protrude from the lower case bottom 1121 in the same direction as the first side wall portion 1122 extends, the fourth protrusion 1124 is formed with a third through hole 1125 coaxial with the second through hole 1123, the third through hole 1125 has a diameter larger than that of the second through hole 1123, the lower case 112 has a second annular groove 1127, the second annular groove 1127 is formed between the side wall of the second through hole 1123 and the side wall of the third through hole 1125, and the second annular groove 1127 communicates with the second through hole 1123. The valve assembly 100 further includes a second sealing member 1002 and a sealing cover 103, the second sealing member 1002 is disposed in the second annular groove 1127, the second sealing member 1002 is pressed and deformed by the lower housing 112 and the sensor 5, the sealing cover 103 is welded and fixed around the fourth protrusion 1124, which may be friction welding in this embodiment, and the bottom 1121 of the lower housing cooperates with the sealing cover 103 to limit the position of the second sealing member 1002 relative to the lower housing. Referring to fig. 16 and 19, the sensor 5 further includes a step portion 54, the step portion 54 is formed with a step surface 541, an outer side of the lower case bottom 1121 abuts against the step surface 541, and the step portion 54 serves to support the lower case 112.

With reference to fig. 20 and 21, the seal cover 103 includes a second body portion 1031 and a third side wall portion 1032, the third side wall portion 1032 being formed on the second body portion 1031, the third side wall portion 1032 axially extending from the second body portion 1031; in the present embodiment, the second body part 1031 abuts against the fourth protruding part 1124, specifically, the inner side of the second body part 1031 is welded and fixed to the upper end surface of the fourth protruding part 1124, the second body part 1031 is formed with a fourth through hole 1033, when the sealing cover 103 is fastened on the fourth protruding part 1124, one end of the sensor 5 is fixedly connected to the valve body 3, and the other end of the sensor 5 passes through the second through hole 1123, the third through hole 1125 and the fourth through hole 1033 and enters the control box inner chamber 10. The second sealing member 1002 disposed in the second annular groove 1127 is in interference fit with the sensor 5, and the second sealing member 1002 further absorbs the stress between the lower housing 112 and the sensor 5 by its elastic compression, so as to further reduce the stress damage to the sealing position between the lower housing 112 and the sensor 5 caused by the cumulative error of the assembly dimension chain, and improve the service life of the valve assembly 100.

In the present embodiment, the stator assembly 2 is clamped with the lower housing 112, but in the present embodiment, the stator assembly 2 and the lower housing 112 may also be integrally injection molded as in the first embodiment. The second sealing member 1002 disposed in the second annular groove 1127 is in interference fit with the sensor 5, and the second sealing member 1002 absorbs the stress between the lower housing 112 and the sensor 5 due to the elastic compression thereof, so that the stress damage of the accumulated error of the assembly dimension chain to the sealing position between the lower housing 112 and the sensor 5 is also reduced, and the service life of the valve assembly 100 is prolonged.

The main difference between the manufacturing method of the valve assembly 100 in the present embodiment and the manufacturing method of the valve assembly in the fourth embodiment is that: step a3 includes placing second seal 1002 in second annular recess 1127 before first pin 21 is placed in first pin opening 142, sealing cover 103 is welded around fourth protrusion 1124, and the second seal is defined between lower housing bottom 1121 and sealing cover 103.

In step a4, it is not necessary to weld and fix the sensor 5 to the outer periphery of the second through hole 1123 of the lower case 112.

Fig. 22 and 23 are schematic structural views of a fifth embodiment of the valve assembly 100, and compared with the first embodiment, the main differences are that: the circuit portion 1 further includes a connection portion 15, the connection portion 15 is fixedly connected to the circuit board 12, the connection portion 15 is disposed side by side, the connection portion 15 is located on one side of the circuit board 12, the connection portion 15 is electrically connected to a circuit of the circuit board 12, the connection portion 15 is formed by a sheet, the connection portion 15 includes a first connection portion 151 and a second connection portion 152, the first connection portion 151 and the second connection portion 152 contract inwards to form a clamping portion 153, the clamping portion 153 is used for clamping the first contact pin 21, the first contact pin 21 is inserted into the clamping portion 153 to enable the stator assembly 2 to be electrically connected to the circuit board 12, and the first contact pin 21 can move by a set distance relative to the connection portion 15 in the insertion direction of the first contact pin 21. This is beneficial to reduce stress damage to the electrical connection of the stator assembly 2 to the circuit board 12 from assembly dimensional chain stack-up errors.

In this embodiment, the stator assembly 2 and the box body 11 are integrally injection molded, but of course, the stator assembly 2 and the box body 11 may also be separately configured and molded as in the second embodiment, and when the stator assembly 2 and the box body 11 are separately configured and molded, the stator assembly 2 is clamped with the box body 11.

The main difference between the manufacturing method of the valve assembly 100 in the present embodiment and the manufacturing method of the valve assembly in the first embodiment is that: in step a3, the first pin 21 is inserted into the clamping portion 153 to electrically connect the stator assembly 2 and the circuit board 12.

Fig. 24 and 25 are schematic structural views of a sixth embodiment of the valve assembly 100, and compared with the first embodiment, the main differences are that: an end surface portion 129 of the circuit board 12 is provided with a second pin hole 122, the first pin 21 is inserted into the second pin hole 122 to realize the electrical connection of the stator assembly 2 and the circuit board 12, and the first pin 21 can move a set distance relative to the circuit board 12 in the insertion direction of the first pin 21. In this embodiment, the first insertion pin 21 is movably connected to the circuit board 12, which is beneficial to reduce the stress damage of the cumulative error of the assembly dimension chain to the electric connection position of the stator assembly 2 and the circuit board 12.

The main difference between the manufacturing method of the valve assembly 100 in the present embodiment and the manufacturing method of the valve assembly in the first embodiment is that: in step a3, the first pin 21 is inserted into the second pin hole 122 formed on the end face portion 129 of the circuit board 12, so that the stator assembly 2 is electrically connected with the circuit board 12.

Fig. 26 to 29 are schematic structural views of a seventh embodiment of the valve assembly, and compared with the first embodiment, the main differences are that: the circuit board 12 includes a first PCB 125 and a flexible flat cable 126, one end of the flexible flat cable 126 is electrically connected to the first PCB 125, the other end of the flexible flat cable 126 has a fifth pin hole 1261, the sensor 5 has a second pin 53, the second pin 53 is inserted into the fifth pin hole 1261 to electrically connect the sensor 5 to the circuit board 12, and the second pin 53 is fixed to the flexible flat cable 126 by welding. In the embodiment, the sensor 5 is welded and fixed to the flexible printed circuit 126, and the flexible printed circuit 126 is connected to the first PCB 125. In the embodiment, the sensor is flexibly connected with the circuit board, so that the accumulated error of the assembly dimension chain in the assembly process cannot cause stress damage at the electric connection part of the first PCB 125 and the sensor 5.

Referring to fig. 26 and 27, in the present embodiment, the stator assembly 2 includes a first pin 21, the circuit board 12 includes a seventh pin hole 128, the first pin 21 is inserted into the seventh pin hole 128 so that the stator assembly 2 is electrically connected to the circuit board 12, and the first pin 21 is fixed to the circuit board 12 by soldering. Of course, referring to fig. 28, as in the first embodiment, the first pin 21 is inserted into the first pin hole 141 to electrically connect the stator assembly 2 to the circuit board 12, and the first pin 21 is movably connected to the circuit board 12. Referring to fig. 26, the stator assembly 2 is integrally injection molded with the lower housing 112 in this embodiment. Of course, referring to fig. 29, the stator assembly 2 and the box body 11 can be separately formed, and when the stator assembly 2 and the box body 11 are separately formed, the stator assembly 2 is clamped with the lower housing 112. In addition, various combinations aiming at the technical characteristics are within the protection scope of the invention.

The main differences between the method of manufacturing the valve assembly 100 of the present embodiment and the method of manufacturing the valve assembly of the first embodiment are that: step a3 is preceded by electrically connecting one end of the flex cable 126 to the sensor 5. Specifically, the second pin 53 is inserted into the fifth pin hole 1261 to electrically connect the sensor 5 and the circuit board 12, and then the second pin 53 is soldered and fixed to the flexible flat cable 126. Step a3 is preceded by inserting the other end of the flex cable 126 on the first PCB 125.

Fig. 30 to 33 are schematic structural views of an eighth embodiment of the valve assembly, and compared with the first embodiment, the main difference is that: the circuit board 12 includes a first PCB 125, a flexible flat cable 126 and a second PCB 127, one end of the flexible flat cable 126 is inserted into the first PCB 125, the other end of the flexible flat cable 126 is inserted into the second PCB 127, the flexible flat cable 126 has a conductive property, the second PCB 127 includes a sixth pin hole 1271, the sensor 5 has a second pin 53, the second pin 53 is inserted into the sixth pin hole 1271 to electrically connect the sensor 5 and the second PCB 127, and the second pin 53 is welded to the second PCB 127. In the embodiment, the sensor 5 is flexibly connected with the first PCB through the flexible flat cable, and the second pin 53 of the sensor 5 is not in direct contact with the first PCB 125 during the assembly process, which is beneficial to reducing stress damage to the electrical connection part between the sensor 5 and the circuit board 12 caused by the accumulated error of the assembly dimension chain.

Referring to fig. 30 and 31, in the present embodiment, the stator assembly 2 includes the first pin 21, the circuit board 12 includes the seventh pin hole 128, the first pin 21 is inserted into the seventh pin hole 128 so that the stator assembly 2 is electrically connected to the circuit board 12, and the first pin 21 is fixed to the circuit board 12 by soldering. Of course, referring to fig. 32, as in the first embodiment, the insertion of the first pin 21 into the first pin hole 141 electrically connects the stator assembly 2 with the circuit board 12, so that the first pin 21 is flexibly connected with the circuit board 12. Referring to fig. 30, the stator assembly 2 is integrally injection molded with the lower housing 112 in this embodiment. Of course, referring to fig. 29, the stator assembly 2 and the box body 11 can be separately formed, and when the stator assembly 2 and the box body 11 are separately formed, the stator assembly 2 is clamped with the lower housing 112. In addition, various combinations of the above technical features are within the scope of the present invention.

The manufacturing method of the valve assembly 100 in the present embodiment is mainly different from the manufacturing method of the valve assembly in the first embodiment in that: before the step a3, electrically connecting the second PCB 127 with the sensor 5, inserting the second pin 53 into the second pin hole 1271 to electrically connect the sensor 5 with the circuit board 12, and then welding and fixing the second pin 53 and the second PCB 127; before the step a3, the method further includes inserting one end of the flexible flat cable 126 into the second PCB 127, where the other end of the flexible flat cable 126 is a free end. Step a3 is preceded by inserting the other end of the flex cable 126 on the first PCB 125.

It should be noted that: although the present invention has been described in detail with reference to the above-mentioned embodiments, it should be understood by those skilled in the art that the present invention may be modified and equivalents may be substituted for those skilled in the art, and all technical solutions and modifications that do not depart from the spirit and scope of the present invention should be covered by the claims of the present invention.

Claims

1. The utility model provides a valve module, includes circuit portion, valve body, case subassembly, stator module and sensor, the case subassembly with valve body fixed connection, the sensor with valve body fixed connection, its characterized in that: the circuit part comprises a box body and a circuit board, the box body forms a box body inner cavity, the circuit board is positioned in the box body inner cavity, the sensor is electrically connected with the circuit board, the stator assembly comprises a first contact pin, the sensor comprises a second contact pin, the first contact pin and the second contact pin both extend into the box body inner cavity, the first contact pin is movably connected with the circuit board, the valve assembly further comprises a third contact pin, the third contact pin is fixedly connected with the box body, the first end of the third contact pin extends into the box body inner cavity, the first end of the third contact pin is fixedly connected with the circuit board, and at least part of the second end of the third contact pin is used for being electrically connected with the outside; the stator assembly is clamped with the box body, the box body comprises an upper shell and a lower shell, the lower shell comprises a first side wall part and a first locking part, the first side wall part is connected with the upper shell in a sealing mode, and the first locking part is formed on the first side wall part; the stator assembly comprises a body part and a second locking part, the second locking part is positioned on the periphery of the body part, at least part of the stator assembly penetrates through a hole formed by the first locking part to enter the inner cavity of the box body, and the stator assembly and the box body are clamped with the second locking part through the first locking part.

2. The valve assembly of claim 1, wherein: the circuit part further comprises a first protruding part, the first protruding part is arranged side by side, the first protruding part is located on one side of the circuit board, the first protruding part is fixedly connected with the circuit board, the first protruding part is electrically connected with the circuit of the circuit board, the first protruding part is arranged on the lower end face of the circuit board side by side, the first protruding part is formed with the first pin holes, the first pins are inserted into the first pin holes, and each of the first pins is at least partially in contact with each of the first protruding part and is electrically connected with the first protruding part.

3. The valve assembly of claim 1, wherein: the end face portion of the circuit board is provided with a second pin hole, the first pin is inserted into the second pin hole to achieve the effect that the stator assembly is electrically connected with the circuit board, and the first pin is opposite to the circuit board and can move for a set distance in the inserting direction of the first pin.

4. The valve assembly of claim 1, wherein: the circuit part further comprises a connecting part, the connecting part is fixedly connected with the circuit board, the connecting part is arranged side by side and is located on one side of the circuit board, the connecting part is electrically connected with a circuit of the circuit board, the connecting part is formed by a sheet, the connecting part comprises a first connecting part and a second connecting part, the first connecting part and the second connecting part contract inwards to form a clamping part, the clamping part is used for clamping a first contact pin, the first contact pin is inserted into the clamping part, the stator assembly is electrically connected with the circuit board, the first contact pin is opposite to the connecting part, and the distance can be set in a movable mode.

5. The valve assembly of any of claims 1-4, wherein: the first locking portion comprises a first main body portion, a second protruding portion and a first through hole, the first main body portion is formed by protruding of part of the first side wall portion, the protruding direction of the first main body portion is orthogonal to the extending direction of the first side wall portion, the first through hole penetrates through the first side wall portion and the first main body portion and is communicated with the inner cavity of the box body, the second protruding portion is formed on the first main body portion and extends towards the first through hole, and the second locking portion is clamped with the second protruding portion.

6. The valve assembly of claim 5, wherein: the second locking portion comprises a boss and a third protruding portion, the body portion is provided with a second side wall portion, the boss is formed by protruding from part of the second side wall portion, the protruding direction of the boss is orthogonal to the axial direction of the body portion, the third protruding portion is formed by protruding from one end face of the boss along the protruding direction of the boss, the third protruding portion is provided with a concave pit, and the second protruding portion is clamped with the concave pit.

7. The valve assembly of claim 6, wherein: the valve component comprises a first side wall portion, a boss and a second side wall portion, wherein the first side wall portion is provided with a first annular groove, the first annular groove is located on the outer side of the first side wall portion, the first annular groove is arranged around the first through hole and communicated with the first through hole, the first sealing element is arranged in the first annular groove, and the first sealing element is extruded and deformed by the boss and the first side wall portion.

8. The valve assembly of any one of claims 1 to 4, wherein: the box body comprises an upper shell and a lower shell, the upper shell is connected with the lower shell in a sealing mode, and the lower shell is fixed with the third contact pin in an injection molding mode.

9. The valve assembly of any of claims 1-4, wherein: the lower shell further comprises a bottom, a second through hole is formed in the bottom, one end of the sensor penetrates through the second through hole to enter the inner cavity of the box body, the other end of the sensor penetrates through the second through hole to be fixedly connected with the valve body, and the periphery of the sensor and the second through hole is welded to form sealing.

10. The valve assembly of claim 5, wherein: the lower shell further comprises a bottom, a second through hole is formed in the bottom, one end of the sensor penetrates through the second through hole to enter the inner cavity of the box body, the other end of the sensor penetrates through the second through hole to be fixedly connected with the valve body, and the sensor and the periphery of the second through hole are welded to form sealing.

11. The valve assembly of any one of claims 6 to 7, wherein: the lower shell further comprises a bottom, a second through hole is formed in the bottom, one end of the sensor penetrates through the second through hole to enter the inner cavity of the box body, the other end of the sensor penetrates through the second through hole to be fixedly connected with the valve body, and the periphery of the sensor and the second through hole is welded to form sealing.

12. The valve assembly of claim 8, wherein: the lower shell further comprises a bottom, a second through hole is formed in the bottom, one end of the sensor penetrates through the second through hole to enter the inner cavity of the box body, the other end of the sensor penetrates through the second through hole to be fixedly connected with the valve body, and the periphery of the sensor and the second through hole is welded to form sealing.

13. The valve assembly of claim 10, wherein: the lower shell is provided with a fourth bulge, the fourth bulge is formed by bulging from the bottom of the lower shell, the bulging direction of the fourth bulge is the same as the extending direction of the first side wall, a third through hole is formed in the fourth bulge, the third through hole and the second through hole are coaxial, the diameter of the third through hole is larger than that of the second through hole, a second annular groove is formed in the lower shell, the second annular groove is formed between the side wall of the second through hole and the side wall of the third through hole, the valve assembly further comprises a second sealing element and a sealing cover, the second sealing element is arranged in the second annular groove, the sealing cover is welded and fixed around the fourth bulge, the lower shell and the sensor are connected in a sealing manner by squeezing the second sealing element, and the bottom of the lower shell is matched with the sealing cover to enable the second sealing element to be limited relative to the lower shell, the sensor is provided with a step part, a step surface is formed on the step part, the outer side of the bottom of the lower shell is abutted against the step surface, and the step part is used for supporting the box body; the sealing cover comprises a second main body part and a third side wall part, the third side wall part is formed on the second main body part, the third side wall part extends axially from the second main body part, the inner side of the second main body part is welded and fixed with the upper end face of the fourth bulge part, a fourth through hole is formed in the second main body part, when the sealing cover is buckled on the fourth bulge part, one end of the sensor is fixedly connected with the valve body, and the other end of the sensor penetrates through the second through hole, the third through hole and the fourth through hole to enter the inner cavity of the box body.

14. The valve assembly of claim 11, wherein: the lower shell is provided with a fourth bulge, the fourth bulge is formed by bulging from the bottom of the lower shell, the bulging direction of the fourth bulge is the same as the extending direction of the first side wall, a third through hole is formed in the fourth bulge, the third through hole and the second through hole are coaxial, the diameter of the third through hole is larger than that of the second through hole, a second annular groove is formed in the lower shell, the second annular groove is formed between the side wall of the second through hole and the side wall of the third through hole, the valve assembly further comprises a second sealing element and a sealing cover, the second sealing element is arranged in the second annular groove, the sealing cover is welded and fixed around the fourth bulge, the lower shell and the sensor are connected in a sealing manner by squeezing the second sealing element, and the bottom of the lower shell is matched with the sealing cover to enable the second sealing element to be limited relative to the lower shell, the sensor is provided with a step part, a step surface is formed on the step part, the outer side of the bottom of the lower shell is abutted with the step surface, and the step part is used for supporting the box body; the sealing cover comprises a second main body part and a third side wall part, the third side wall part is formed on the second main body part, the third side wall part extends axially from the second main body part, the inner side of the second main body part is welded and fixed with the upper end face of a fourth bulge, a fourth through hole is formed in the second main body part, when the sealing cover is buckled on the fourth bulge, one end of the sensor is fixedly connected with the valve body, and the other end of the sensor penetrates through the second through hole, the third through hole and the fourth through hole to enter the inner cavity of the box body.

15. A method of manufacturing a valve assembly comprising a valve assembly according to any one of claims 1 to 12, the method of manufacturing the valve assembly comprising the steps of:

a1, fixedly connecting the valve core assembly with the valve body;

a2, fixedly connecting the sensor with the valve body;

a4, fixing the assembly formed in the step a3 on a support, and fixedly connecting the assembly formed by assembling the support with the step a1 and the step a2 and the valve body by using a first screw assembly;

a5, welding and fixing the upper shell and the lower shell.

16. The manufacturing method according to claim 15, characterized in that: the step a3 further includes electrically connecting the circuit board with a third pin injection-molded on the case, inserting a first end of the third pin into a third pin hole formed on the circuit board, and soldering and fixing the first end of the third pin with the circuit board, where the circuit board is connected with an external power supply through at least a part of a second end of the third pin and transmits and/or receives signals; step a4 further includes electrically connecting the circuit board to the sensor, where the sensor includes a second pin, inserting the second pin into a fourth pin hole formed on the circuit board, and soldering and fixing the second pin to the circuit board.