CN110966445A

CN110966445A - Valve assembly, electrically operated valve and thermal management assembly

Info

Publication number: CN110966445A
Application number: CN201811146545.8A
Authority: CN
Inventors: 不公告发明人
Original assignee: Hangzhou Sanhua Research Institute Co Ltd
Current assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Priority date: 2018-09-29
Filing date: 2018-09-29
Publication date: 2020-04-07

Abstract

A valve component, an electric valve and a heat management component are provided, the valve component can be detachably connected with an installation part, the valve component comprises a stator component and a first component, the first component comprises a rotor component, a sleeve, a valve seat and a valve core, the rotor component is positioned on the inner side of the sleeve, the stator component is positioned on the outer side of the sleeve, the valve seat is directly or indirectly fixedly connected with the sleeve, the valve seat is provided with a valve port, the rotor component can drive the valve core to operate relative to the valve port, at least part of the valve seat can be inserted into the installation part, the valve component also comprises a first connecting piece, the first connecting piece is fixedly connected with the valve seat and the stator component, the valve seat; stator module and disk seat fixed connection are connected to first connecting piece, and the valve module forms a whole and spacing with the installation department for the valve module forms a module, and the user can assemble as required.

Description

Valve assembly, electrically operated valve and thermal management assembly

[ technical field ] A method for producing a semiconductor device

The invention relates to the technical field of fluid control, in particular to a flow regulating device.

[ background of the invention ]

With the increasing demand for control accuracy, electrically operated valves have been increasingly used as flow rate control devices. The electric valve comprises a stator assembly, a valve seat and a mounting part, and the electric valve is assembled as a whole, so that the structure of the mounting part is limited, and a user cannot assemble the electric valve according to the requirement.

[ summary of the invention ]

The object of the present invention is to provide a valve assembly which facilitates the formation of the valve assembly as a module which can be assembled by the customer as desired.

The invention provides a technical scheme that: a valve assembly removably connectable with a mounting portion, the valve assembly comprising a stator assembly and a first component, the stator assembly includes a coil, the first component includes a rotor assembly, a sleeve, a valve seat, and a valve core, the rotor assembly is positioned at the inner side of the sleeve, the stator assembly is positioned at the outer side of the sleeve, the valve seat is directly or indirectly fixedly connected with the sleeve, the valve seat is provided with a valve port, the rotor assembly can drive the valve core to move relative to the valve port, at least part of the valve seat can be inserted into the mounting part, the valve assembly further comprises a first connector fixedly connecting the valve seat and the stator assembly, the valve seat comprises a side wall, and a part of the periphery of the side wall is formed with a concave part which can be used for cooperating with a limiting piece to limit the axial displacement of the valve component relative to the mounting part.

The invention also provides a technical scheme that: the utility model provides an electrically operated valve, includes valve body and valve module, the valve module be more than the valve module, the installation department does the valve body, the valve body includes first circulation passageway and second circulation passageway, the valve body is formed with first installation cavity, and at least part the valve seat is located first installation cavity, electrically operated valve still includes the locating part, the valve body still is formed with the mounting hole, the extending direction of mounting hole is perpendicular to the extending direction of first installation cavity, the locating part inserts the mounting hole, the locating part with the lateral wall butt of concave part, the locating part is injectd the valve module is relative the axial displacement distance of valve body.

The invention also provides a technical scheme that: a thermal management assembly comprising a heat exchanger, a valve body and a valve assembly, the valve assembly being as described above, the heat exchanger comprises a connecting port, working media enter or flow out of the heat exchanger through the connecting port, the valve body is fixedly connected with the heat exchanger and comprises a first circulation channel and a second circulation channel, the connecting port is communicated with the first circulation channel or the second circulation channel, the valve body is formed with a first mounting cavity, at least part of the valve seat is positioned in the first mounting cavity, the heat management assembly further comprises a limiting piece, the valve body is further provided with a mounting hole, the extending direction of the mounting hole is perpendicular to the extending direction of the first mounting cavity, the limiting piece is inserted into the mounting hole and abutted against the side wall of the concave part, and the limiting piece limits the axial movement distance of the valve assembly relative to the valve body.

The electric valve and the thermal management assembly in the embodiment each comprise a valve assembly, the valve assembly comprises a stator assembly and a valve seat, the valve assembly further comprises a first connecting piece, the first connecting piece is fixedly connected with the valve seat and the stator assembly, the valve assembly comprises a side wall, a concave part is formed on the periphery of the side wall, and the concave part can be used for being matched with a limiting piece to limit the axial displacement of the valve assembly relative to the mounting part; like this, stator module and disk seat fixed connection are connected with first connecting piece, and the valve module forms a whole and spacing with the installation department for the valve module forms a module, and the user can assemble as required.

[ description of the drawings ]

Figure 1 is a schematic view of one embodiment of an electrically operated valve provided by the present invention;

figure 2 is a schematic cross-sectional view of the electrically operated valve of figure 1;

figure 3 is a schematic exploded view of the electrically operated valve of figure 1;

FIG. 4 is a structural schematic diagram of a perspective of the first embodiment of the valve assembly of FIG. 1;

FIG. 5 is a cross-sectional structural schematic view of the valve assembly of FIG. 4;

FIG. 6 is a schematic view of an exploded construction of the valve assembly of FIG. 4;

FIG. 7 is a schematic view of a combination of the first member and the first connecting member of FIG. 4;

FIG. 8 is a schematic cross-sectional view of FIG. 7;

FIG. 9 is a schematic view of a first component of FIG. 7;

FIG. 10 is a perspective view of the first embodiment of the first connector of FIG. 7;

FIG. 11 is a schematic view of the first connecting member of FIG. 7 prior to the stamping of the projections;

FIG. 12 is a perspective view of a second embodiment of the first connector of FIG. 7;

FIG. 13 is a structural schematic view of another perspective of the valve assembly of FIG. 4;

FIG. 14 is a front structural schematic view of the valve assembly of FIG. 13;

FIG. 15 is a perspective view of a second embodiment of the valve assembly;

FIG. 16 is a perspective view of a third embodiment of the valve assembly;

FIG. 17 is a perspective view of a fourth embodiment of the valve assembly;

FIG. 18 is a cross-sectional structural view of the valve assembly of FIG. 17;

FIG. 19 is a perspective view of a fifth embodiment of a valve assembly;

FIG. 20 is a perspective view of the valve body of FIG. 1;

figure 21 is a schematic diagram of the electrically operated valve of figure 1 from another perspective;

FIG. 22 is a cross-sectional structural view of the valve body of FIG. 20;

FIG. 23 is a cross-sectional view of the engagement portion of the retainer with the valve body in FIG. 21;

FIG. 24 is a perspective view of the retaining member of FIG. 21;

figure 25 is a schematic cross-sectional view of the electrically operated valve of figure 1;

FIG. 26 is a structural schematic diagram of a perspective of the sixth embodiment of the valve assembly of FIG. 1;

FIG. 27 is a schematic structural view of one embodiment of a thermal management assembly provided by the present invention;

FIG. 28 is a schematic view of a second embodiment of the first member.

[ detailed description ] embodiments

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

the electric valve in the embodiment is mainly applied to a refrigeration system, is particularly used in the field of flow control, and can be used for adjusting the flow of a working medium in the refrigeration system. Fig. 1 is a schematic cross-sectional configuration diagram of a first embodiment of an electrically operated valve according to the present invention, and the concept of "up and down" in the following description corresponds to the up and down in the drawing of fig. 1.

Referring to fig. 1, 2 and 3, in the present embodiment, the electric valve 100 includes a valve assembly 101 and a valve body 102, the valve assembly 101 and the valve body 102 are fixedly connected or detachably connected, of course, the valve body 102 may also be fixedly connected or integrally formed with the heat exchanger, and then the valve assembly 101 is connected with the valve body 102, as shown in fig. 27. The mounting portion includes the valve body 102, and the mounting portion may be another structure designed by a user as needed.

The valve assembly 101 includes a stator assembly 110, a first component 103, and a control portion 104; in this embodiment, the control part 104 is relatively limited to the stator assembly 110, the first component 103 is relatively limited to the valve body 102, and the first component 103 is relatively limited to the stator assembly 110; that is, the first component 103 is directly or indirectly connected to the stator assembly 110, and the first component 103 is connected to the valve body 102; so that the valve assembly forms one whole.

The stator assembly 110 comprises coils 1101 and a bobbin 1102, the bobbin 1102 providing support for winding of the coils 1101; referring to fig. 2, in this embodiment, the valve assembly 101 further includes an injection molded body 105, the injection molded body 105 is formed by injection molding, in this embodiment, the injection molded body 105 takes parts including a coil 1101 and a bobbin 1102 as an injection molding insert, and the injection molded body 105 forms an insulating layer 1103 of the stator assembly 110 on the periphery of the coil 1101 and the bobbin 1102, so as to prevent the stator assembly 110 from being corroded by a working medium or air. The control part 104 comprises an electric control box 190 and a circuit board assembly 130, and the electric control box 190 is fixedly connected with the stator assembly 110 through welding. The circuit board assembly 130 is arranged inside the electronic control box 190, the circuit board assembly 130 is electrically connected with the coil 1101, the circuit board assembly 130 can be electrically connected with an external signal source, the valve assembly 103 comprises a control part 104, the control part 104 controls the valve assembly or the electric valve, and therefore control accuracy and efficiency of the valve assembly are improved, the stator assembly 110 is fixedly connected with the electronic control box 190, and in this instance, the stator assembly 110 is welded with the electronic control box 190 in an ultrasonic mode.

Referring to fig. 2 and 8, the first component 103 includes a rotor assembly 120, a sleeve 140, a valve seat 150, a valve core 170, and a transmission device 180, where the rotor assembly 120 is located inside the sleeve 140, the stator assembly 110 is located outside the sleeve 140, that is, the sleeve 140 separates the rotor assembly 120 and the stator assembly 110, the rotor assembly 120 drives the valve core 170 to move through the transmission device 180, and the valve seat 150 is directly or indirectly fixedly connected to the sleeve 140 relatively. In this embodiment, valve assembly 103 is removably coupled to valve body 102 by a valve seat 150.

Referring to fig. 7 and 8, the valve assembly 101 further includes a first connecting member 1, and the first connecting member 1 is fixedly connected to the valve seat 150 by welding; or the first connecting member 1 is integrally formed with the valve seat 150, as shown in fig. 28; referring to fig. 4 and 6, the stator assembly 110 is fixedly connected to the first connecting member 1, so that the first connecting member 1 fixedly connects the stator assembly 110 and the first component 103; this makes the valve assembly 103 integral. Referring to fig. 1 and 3, the stator assembly 110, the first member 103 and the first connecting member 1 as a whole are fixedly connected with the valve body 102 so that the valve body can be selected as desired. With reference to fig. 5, in the present embodiment, the valve seat 150 includes a side wall 151, and a recess 152 formed on the outer periphery of the side wall 151, wherein the recess 152 can be used to cooperate with the stopper 5 to limit the axial displacement of the valve assembly relative to the valve body; in the first, second, third, fourth and fifth embodiments of the valve assembly, the recess 152 is an annular groove formed on the outer periphery of the valve seat 150, and in the above embodiments, the restriction member 5 is engaged with the recess 152 to restrict only the rotation of the valve assembly 101 with respect to the valve body 102; in a sixth embodiment, as shown in fig. 26, the recess 152 is a non-annular structure, and the recess 152 is capable of cooperating with the stop 5 to limit the rotation and axial movement of the valve assembly 101 relative to the valve body 102, such as: the concave portion 152 includes an extending portion, the extending direction of the extending portion is the same as the extending direction of the limiting member, and the length of the extending portion attached to the limiting member is greater than 2mm in the installation direction of the limiting member.

Referring to fig. 10 to 16, the first connector 1 includes a body 12 and a protrusion 13, the body 12 is annular, and the central hole 11 is located at a central position of the body 12. The protruding part 13 is formed by stamping and/or bending, the protruding part 13 includes a free end 131 and a connecting end 132, the connecting end 132 is fixedly connected with the body 12, and the protruding part 13 protrudes out of the body 12.

In fig. 10 to 15, the protruding portion 13 is in the shape of a sheet, and is formed by press bending; in fig. 10 and 14, the number of the convex portions is one, and in fig. 10 and 11, the vertical distance between both side portions of the convex portion is defined as the width w of the convex portion, which is the same within the manufacturing error range of 1mm due to the same thickness, i.e., the same cross-sectional area, of the convex portion between the connecting end 132 and the free end 131; the punching position 124 forming the free end is disposed closer to the center of the first link 1 than the link end 132, so that installation interference can be prevented; in fig. 12 to 14, the vertical distance between both side portions of the projecting portion is defined as the width w of the projecting portion, the width of the projecting portion at the free end is larger than the width of the projecting portion at the connecting end, that is, the cross-sectional area of the free end is smaller than that of the connecting end, and the punching position for forming the free end is located closer to the center of the first link than the connecting end, so that mounting interference can be prevented; fig. 12 to 14 are advantageous in improving the connection strength of the projection with respect to the embodiment of fig. 10; the number of the convex parts in fig. 15 is three, and the structure is the same as that in fig. 12 to 14, so that the limiting of the valve assembly and the valve body is more stable.

In fig. 16, the projecting portion 13 is formed in a cylindrical shape, the projecting portion 13 is formed by pressing, and a distance from a circle 134 where the connecting end of the projecting portion is located to the outer edge of the main body portion is substantially the same as a distance from the through hole 121 to the outer edge of the main body portion.

Referring to fig. 17-18, the main difference from fig. 10-16 is that: the first connecting piece, in this embodiment, the first connecting piece 1 includes a body 12 and a central hole, the valve assembly 103 includes a positioning pin 13, the body 12 includes a positioning hole 126, one end of the positioning pin 13 is inserted into the positioning hole 126, and the other end of the positioning pin 13 can extend into a limiting hole of the valve body to limit the rotational displacement of the valve assembly relative to the valve body. In order to fix the positioning pin relative to the valve assembly, in the present embodiment, the positioning pin 13 includes a cap portion 135 and a rod portion 136, the stator assembly 110 is formed with an accommodating portion 1111, the cap portion 135 is accommodated in the accommodating portion 1111, the main body portion 12 is disposed in abutment with the cap portion 135, the main body portion 12 defines an axial movement displacement of the cap portion 135 relative to the stator assembly 110, the rod portion 136 passes through the positioning hole 126 and protrudes out of a different side of the main body portion 12 from the cap portion 135, and the rod portion 136 can extend into a limiting hole of a mounting portion to define a rotational displacement of the valve assembly relative to the mounting portion, which.

In the above embodiment, the main body 12 further includes at least one through hole 121, the stator assembly 110 further includes at least 3 protruding portions 1105 matching with the through hole 121, the number of the protruding portions 1105 is at least 3, the protruding portions 1105 are integrally formed with the insulating layer of the stator assembly 110 or the protruding portions 1105 are separately formed and then fixedly connected with the stator assembly 110, the protruding portions 1105 are made of a material having thermoplasticity, and the protruding portions 1105 are inserted into the through hole 121 and fixedly connected with the first connector 1 and the stator assembly 110 by means of hot-melt riveting; in order to improve the connection strength of the body part and the stator assembly, the through holes are uniformly distributed along the circumference of the body part, the number of the through holes is the same as that of the protrusions, and in the above embodiment, the number of the through holes is three.

As shown in fig. 1 to 27, the first member 103 further includes a baffle portion 1031, the baffle portion 1031 is integrally formed with the valve seat 150, in this embodiment, the baffle portion 1031 includes a flange portion 1032 and a step portion 1033, an outer diameter of the step portion 1033 is smaller than an outer diameter of the flange portion 1032, the first connector 1 is sleeved on an outer periphery of the step portion 1033 and abuts against the flange portion 1032, and the first connector 1 is fixedly connected with the step portion 1033 and/or the flange portion 1032; in this embodiment, a weld may be formed at the connection between the first connector 1 and the step 1033 and/or the connection between the first connector 1 and the flange 1032 to fixedly connect the first connector 1 and the first member 103.

In fig. 28, the first connecting member 1 is integrally formed with the first member 103, specifically, the first connecting member 1 is integrally formed with the valve seat 150, and other structures of the first member 103 are the same as those described above, and are not described again.

With reference to fig. 13 to 16, the flap 1031 has a notch 1034 formed on a portion of the flap 1031 corresponding to the protrusion 1105, so that the protrusion 1105 can be formed more easily, the protrusion 13 is disposed near the outer edge of the flap 1031, which is beneficial to enhance the strength of the protrusion 13 by the outer edge of the flap, and the protrusion 13 is disposed protruding from the flap 13031, i.e., the length of the protrusion 13 is greater than the thickness of the flap 1031.

With reference to fig. 17 to 19, the flap 1031 is formed with a notch 1034 at a portion corresponding to the protrusion 1105, so that the protrusion 1105 can be formed more easily, the stem 136 of the positioning pin is disposed near the outer edge of the flap 1031 or the stem 136 of the positioning pin is disposed through the flap 1031, the stem 136 protrudes from the flap 1031, and the length of the stem 136 is greater than the thickness of the flap 1031.

As shown in fig. 2, the valve body 102 has a first flow channel 1601 and a second flow channel 1602, the first flow channel 1601 and the second flow channel 1602 communicate with each other through the valve port 1502, the valve port 1502 may be formed on the valve body 102 or a component having the valve port 1502 is fixedly disposed on the valve body 102, in this embodiment, the valve seat 150 has the valve port 1502, and the valve seat 150 is fixedly disposed relative to the valve body 102, so that the processing of the valve port 1502 can be facilitated; the rotor assembly 120 can drive the valve core 170 to move, the valve core 170 can move relatively close to or far away from the valve port 1502, the flow cross-sectional area of the valve port 1502 is changed, the communication cross-sectional areas of the first flow channel 1601 and the second flow channel 1602 are changed, the flow of a system where the valve assembly is arranged is adjusted, the valve seat 150 is further provided with a communication hole 1503, and the communication hole 1503 can communicate the inner cavity of the valve seat 150 with the inner cavity of the first flow channel 1601 and the communication hole 1503 can communicate the inner cavity of the valve seat 150 with the second flow channel 1602.

Referring to fig. 2, for convenience of description, the valve body 102 and the stator assembly 110 defining the electric valve are arranged along the axial direction of the electric valve, and define an axis L, and a direction perpendicular to the axis L is defined as a radial direction of the electric pump; that is, the moving direction of the valve core 170 is axial, the valve core 170 moves up and down along the axis L, and the stator assembly 110 and the rotor assembly 120 are arranged along the radial direction of the electric valve.

Referring to fig. 2, 20, 21, 22, and 23, the valve body 102 is provided with a first mounting chamber 1603 along the direction of the axis L, and at least a portion of the valve seat 150 is provided to extend into the first mounting chamber 1603. The valve seat 150 is fixedly mounted in the first mounting cavity 1603 of the valve body 102, the valve seat 150 comprises a side wall 151, a concave portion 152 is formed in the side wall 151, the side wall 151 is matched with the valve body 102 forming the first mounting cavity 1603, a sealing ring 3 is arranged between the side wall 1512 and the valve body 102 of the valve seat 150, the risk of leakage of the electric valve can be reduced, and the number of the sealing rings 3 is two.

The valve body 102 further comprises a mounting hole 41, the extending direction of the mounting hole 41 is perpendicular to the extending direction of the valve seat 150, the mounting hole 41 comprises a first section 411 and a second section 412, the first section 411 and the second section 412 are communicated with the mounting cavity 1603, at least part of the first section 411 is a threaded hole, the second section 412 is a smooth hole, the limiting piece 5 comprises a first portion 51 and a second portion 52, at least part of the first portion 51 is provided with an external thread on the periphery, and the second portion 52 is a smooth rod; when the valve assembly 103 and the valve body 102 are assembled, the mounting hole 41 corresponds to the recess 152, the stopper 5 extends into the mounting hole 41, the first portion 51 of the stopper extends into the threaded hole and is screwed, the second portion 52 extends into the second section 412 and is supported by the valve body 102, and referring to fig. 23, a part of the second portion 52 extends into the recess 152 and contacts with the wall forming the recess 152, thereby limiting the axial displacement of the valve seat relative to the valve body. In this embodiment, the number of the mounting holes is two, which are the first mounting hole and the second mounting hole respectively, and the number of the limiting portions is two, which are the first limiting member and the second limiting member respectively, so that the valve seat and the valve body are more stably connected.

Besides the above structure, the limiting member 5 may also be a resilient retainer ring, and the resilient retainer ring is placed in a recess of the valve seat and a groove correspondingly formed in the valve body to limit axial movement of the valve seat relative to the valve body.

The upper end of the valve body 102 is formed with a limiting hole 42, and the projection 13 can extend into the limiting hole 42 and limit the valve body relative to the valve body, and can limit the rotational displacement of the valve assembly relative to the valve body.

In fig. 27, the thermal management assembly 10 includes a heat exchanger 20, a valve body 102 and a valve assembly 101, where the valve assembly 101 is described above, the heat exchanger 20 includes a connection port 201, a working medium enters or exits the heat exchanger 20 through the connection port 201, the valve body 102 is fixedly connected to the heat exchanger 20, the valve body 102 includes a first circulation channel and a second circulation channel, the connection port 201 is communicated with the first circulation channel or the second circulation channel, the valve body is formed with a first installation cavity, at least a portion of the valve seat is located in the first installation cavity, the thermal management assembly includes a limiting member, the valve body includes an installation hole, the limiting member is inserted into the installation hole, the limiting member abuts against a side wall of the recess, the limiting member limits an axial movement distance of the valve assembly relative to the valve body.

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. A valve assembly, the valve assembly being detachably connectable to a mounting portion, the valve assembly comprising a stator assembly and a first component, the stator assembly comprising a coil, the first component comprising a rotor assembly, a sleeve, a valve seat, and a valve core, the rotor assembly being located inside the sleeve, the stator assembly being located outside the sleeve, the valve seat being fixedly connected to the sleeve directly or indirectly, the valve seat having a valve port, the rotor assembly being capable of driving the valve core to operate relative to the valve port, the valve assembly comprising: at least part the valve seat can insert the installation department, valve module still includes first connecting piece, first connecting piece fixed connection the valve seat with stator module, the valve seat includes the lateral wall, and part the periphery of lateral wall is formed with the recess, the recess can be used for with the locating part cooperation limited valve module for the axial displacement of installation department.

2. The valve assembly of claim 1, wherein: the concave part is provided with an annular groove around the periphery of the side wall, the first connecting piece comprises a body part and a protruding part, the body part and the protruding part are integrally formed, the protruding part protrudes out of the body part, the protruding direction of the protruding part faces the direction of the mounting part, and the protruding part can extend into the limiting hole of the mounting part to limit the rotary displacement of the valve component relative to the mounting part.

3. The valve assembly of claim 2, wherein: the protruding portion is formed by stamping and/or bending relative to the body portion, the protruding portion is sheet-shaped, the protruding portion comprises a free end and a connecting end, the free end protrudes out of the body portion and is far away from the body portion, the connecting end is fixedly connected with the body portion, the cross sectional area of the free end is smaller than or equal to that of the connecting end, and the stamping position of the free end is closer to the center of the first connecting piece than the connecting end.

4. The valve assembly of claim 2, wherein: the protruding part is formed by stamping relative to the body part, the protruding part is cylindrical, the protruding part comprises a free end and a connecting end, the free end protrudes out of the body part and is far away from the body part, and the fixed connecting end is fixedly connected with the body part.

5. The valve assembly of claim 1, wherein: the recess is a ring-shaped groove arranged around the periphery of the side wall, the first connecting piece comprises a body part, the valve assembly further comprises a positioning pin, a positioning hole is formed in the body part, one end of the positioning pin is inserted into the positioning hole, and the other end of the positioning pin can be inserted into a limiting hole of the mounting part to limit the rotation displacement of the valve assembly relative to the mounting part.

6. The valve assembly of claim 5, wherein: the stator assembly comprises an accommodating part, the positioning pin comprises a cap part and a rod part, the cap part is accommodated in the accommodating part, the main body part is abutted to the cap part to limit the axial movement displacement of the cap part relative to the stator assembly, the rod part penetrates through the positioning hole and protrudes out of the main body part, and the rod part can extend into the limiting hole of the mounting part to limit the rotation displacement of the valve assembly relative to the mounting part.

7. The valve assembly of any of claims 1-6, wherein: the body portion is formed with a through hole, the valve assembly comprises an injection molded body, at least part of the injection molded body penetrates through the through hole, the part of the injection molded body is melted to form a riveting protrusion portion, the first connecting piece and the stator assembly are fixed through the protrusion portion, and the protrusion portions are uniformly distributed along the circumference of the body portion.

8. The valve assembly of any of claims 1-7, wherein: the valve seat further comprises a baffle plate portion, the baffle plate portion comprises a flange portion and a step portion, the first connecting piece is sleeved on the periphery of the step portion and abutted to or in clearance fit with the flange portion, and the first connecting piece is fixedly connected with the step portion and/or the flange portion.

9. An electrically operated valve, comprising a valve body and a valve assembly, wherein the valve assembly is the valve assembly according to any one of claims 1 to 8, the mounting portion is the valve body, the valve body comprises a first circulation passage and a second circulation passage, the valve body is formed with a first mounting cavity, at least a part of the valve seat is located in the first mounting cavity, the electrically operated valve further comprises a limiting member, the valve body is further formed with a mounting hole, the extending direction of the mounting hole is perpendicular to the extending direction of the first mounting cavity, the limiting member is inserted into the mounting hole, the limiting member abuts against the side wall of the recess, and the limiting member limits the axial movement distance of the valve assembly relative to the valve body.

10. A thermal management assembly comprising a heat exchanger, a valve body and a valve assembly, the valve assembly being as claimed in any one of claims 1 to 8, the heat exchanger comprises a connecting port, working media enter or flow out of the heat exchanger through the connecting port, the valve body is fixedly connected with the heat exchanger and comprises a first circulation channel and a second circulation channel, the connecting port is communicated with the first circulation channel or the second circulation channel, the valve body is formed with a first mounting cavity, at least part of the valve seat is positioned in the first mounting cavity, the heat management assembly further comprises a limiting piece, the valve body is further provided with a mounting hole, the extending direction of the mounting hole is perpendicular to the extending direction of the first mounting cavity, the limiting piece is inserted into the mounting hole and abutted against the side wall of the concave part, and the limiting piece limits the axial movement distance of the valve assembly relative to the valve body.