CN115492963A - Electrically operated valve and method of assembling the same - Google Patents

Abstract

An electric valve and its assembly method, the electric valve includes a valve body, a valve core and a sealing seat, the valve body has a valve body cavity, the valve core has a mounting cavity and a hole, at least part of the sealing seat is located in the mounting cavity, and the sealing seat is connected and fixed to the valve core Or connect the limit position, the valve core equipped with the sealing seat is integrally loaded into the valve body cavity, so that, compared with separately installing the sealing seat and the valve core into the valve body cavity in sequence, the application is limited by the space of the valve body cavity during the assembly process. The small size is conducive to the simple assembly of the electric valve.

Description

Electric valve and its assembly method

technical field

The application relates to the field of vehicle parts, in particular to an electric valve and an assembly method thereof.

Background technique

Electric valves can be used in vehicle thermal management systems or air-conditioning systems, and generally switch or reverse the working fluid. The electric valve includes a valve body, a valve core and a sealing seat. Generally, the sealing seat and the valve core are separately installed in the valve body cavity of the valve body in sequence. Due to the limitation of the space of the valve body cavity, the sealing seat and the valve core are inconvenient in the assembly process.

Contents of the invention

The purpose of this application is to provide an electric valve and its assembly method, which is beneficial to the simple assembly of the electric valve.

In order to achieve the above object, the application adopts the following technical solutions:

An electric valve, comprising a valve body, a valve core and a sealing seat, the valve body has a valve body cavity and a channel, the valve core has a hole and a mounting cavity, at least part of the sealing seat is located in the mounting cavity, the sealing The seat is fixedly connected with the valve core or connected to limit, the sealing seat has a through hole, the through hole is set through the sealing seat, the through hole communicates with the channel, the sealing seat and the valve The core is located in the valve body cavity, and the through hole and the channel can communicate with two or more of the channels.

An assembly method of an electric valve, the assembly method comprising the following steps: installing at least part of the sealing seat into the installation cavity of the valve core; assembling the sealing seat and the valve core to fix or limit the assembly; The valve core of the sealing seat is integrally installed into the valve body cavity of the valve body.

The application provides an electric valve and its assembly method. The electric valve includes a valve body, a valve core and a sealing seat. The valve body has a valve body cavity, and the valve core has an installation cavity and a hole. The valve core is connected and fixed or limited, and the valve core equipped with the sealing seat is integrally installed into the valve body cavity. In this way, compared with separately installing the sealing seat and the valve core into the valve body cavity in sequence, the application is controlled by the valve body cavity during the assembly process. The space restriction is small, which is conducive to the simple assembly of the electric valve.

Description of drawings

Fig. 1 is a schematic cross-sectional structure diagram of an embodiment of the first embodiment of the electric valve;

Fig. 2 is a schematic cross-sectional structural view of the valve part in Fig. 1;

Fig. 3 is a schematic diagram of a three-dimensional structure of the spool in Fig. 1;

Fig. 4 is a schematic cross-sectional structure diagram of the spool in Fig. 3;

Fig. 5 is a schematic diagram of a three-dimensional structure of the sealing seat in Fig. 1;

Fig. 6 is a schematic cross-sectional structure diagram of the sealing seat in Fig. 5;

Fig. 7 is a three-dimensional structural schematic diagram of the sealing seat, the sealing member and the valve core in Fig. 1;

Fig. 8 is a schematic cross-sectional structure diagram of the sealing seat, the sealing member and the valve core in Fig. 7;

Fig. 9 is a schematic cross-sectional structure diagram of the valve body in Fig. 1;

Fig. 10 is a schematic cross-sectional structural view of the spool in the first position of an example of the first embodiment of the electric valve;

Fig. 11 is a schematic cross-sectional structural view of the spool in the second position of an example of the first embodiment of the electric valve;

Fig. 12 is a schematic cross-sectional structural view of the spool in the third position of an example of the first embodiment of the electric valve;

Fig. 13 is a schematic cross-sectional structure diagram of an example of the second embodiment of the electric valve;

Fig. 14 is a schematic diagram of a three-dimensional structure of the spool in Fig. 13;

Fig. 15 is a schematic perspective view of the sealing seat in Fig. 13 .

detailed description

Below in conjunction with accompanying drawing and specific embodiment the application is further described:

Referring to Fig. 1, the electric valve can be applied in the vehicle thermal management system or air conditioning system, especially in the refrigerant circulation loop of the system, wherein the vehicle thermal management system includes the new energy vehicle thermal management system. The electric valve 100 includes a driving part 1, a valve part 2, a valve body 3 and a valve core 4, the valve body 3 has a valve body cavity 30, the valve part 2 includes a valve stem 21, the valve core 4 is located in the valve body cavity 30, and the valve part 2 passes through the valve stem 21 is in transmission connection with the valve core 4, the valve part 2 is connected and fixed with the valve body 3 or is limited in position, the driving part 1 is located on the outer periphery of a part of the valve part 2, and the driving part 1 and the valve body 3 or the driving part 1 and the valve part 2 are connected and fixed Or connection limit, the electric valve 100 is electrically connected and/or signal connected with the outside through the driving part 1 .

Referring to Fig. 1 , the driving part 1 includes an outer shell 11, a stator assembly 12, a circuit board 13, an interface portion 14 and pins 15, and the shell of the outer shell 11 and the interface portion 14 can be connected by integral injection molding or assembly. In the embodiment, the outer casing 11 and the casing of the interface part 14 are integrally injection molded. The outer casing 11 is formed with a housing chamber 110, the stator assembly 12 and the circuit board 13 are located in the housing chamber 110, part of the valve part 2 is located in the housing chamber 110, the stator assembly 12 is located on the outer periphery of the valve part 2, the stator assembly 12 and the circuit board 13 are electrically connected connections and/or signal connections. The pin 15 is connected and fixed to the interface part 14. In this embodiment, the middle part of the pin 15 is injection molded and fixed to the housing of the interface part 14. One end of the pin 15 is located in the housing cavity 110, and is electrically connected to the circuit board 13 and/or Or signal connection, the other end of the pin 15 is located in the socket cavity formed by the interface part 14, and is used for electrical connection and/or signal connection with the outside world. In this embodiment, the driving part 1 is fixedly connected to the valve body 3 or is limited in position. Furthermore, there is a sealing arrangement between the driving part 1 and the valve body 3, which is beneficial to prevent the entry of water vapor or other impurities in the outside air. The housing cavity 110 contacts the stator assembly 12 or the circuit board 13 , causing the stator assembly 12 and/or the circuit board 13 to fail.

1 and 2, the valve component 2 also includes a rotor assembly 22, a transmission assembly 23, a connecting seat 24 and a sleeve 25, and the sleeve 25 is connected and fixed to the connecting seat 24. In this embodiment, the sleeve 25 and the connecting seat 24 is welded and fixed, the sleeve 25 is assembled with the connecting seat 24 to form an accommodating chamber 250, the rotor assembly 22 and at least part of the transmission assembly 23 are located in the accommodating chamber 250, and part of the transmission assembly 23 is located in the rotor chamber formed by the rotor assembly 22, which is conducive to reducing the valve The axial height of the component 2 is beneficial to reduce the axial height of the electric valve 100 .

1 and 2, the rotor assembly 22 includes a rotor 221 and a connecting piece 222, the transmission assembly 23 includes a sun gear 231, a transmission planetary gear assembly 232, a fixed ring gear 233 and an output planetary gear assembly 234, and the transmission assembly 23 can be configured according to the transmission ratio According to the requirements, a multi-stage transmission planetary gear assembly 232 is provided. In this embodiment, along the axial direction of the transmission assembly 23, the transmission assembly 23 sequentially includes a first transmission planetary gear assembly, a second transmission planetary gear assembly, and a third transmission planetary gear assembly. components. The rotor 221 is fixedly connected to the connecting piece 222 or limited in position. In this embodiment, the connecting piece 222 is used as an injection molded insert to form the rotor 221 through injection molding. The connecting piece 222 is connected to the sun gear 231 to be fixed or limited in position. The fixed ring gear 233 is located on the outer periphery of part of the sun gear 231, and the fixed ring gear 233 is connected to the connecting seat 24 to fix or connect to limit. The fixed ring gear 233 is located on the outer periphery of the transmission planetary gear assembly 232. Mesh with the fixed ring gear 233, specifically, the sun gear 231 meshes with the first transmission planetary gear assembly, the first transmission planetary gear assembly meshes with the fixed ring gear 233, and the second transmission planetary gear assembly respectively meshes with the first transmission planetary gear assembly and The fixed ring gear 233 meshes, the third transmission planetary gear assembly meshes with the second transmission planetary gear assembly and the fixed ring gear 233 respectively, and the output planetary gear assembly 234 meshes with the third transmission planetary gear assembly and the fixed ring gear 233 respectively. In this way, when the rotor 221 rotates under the excitation of the magnetic field of the stator assembly 12, the rotor 221 drives the sun gear 231 to rotate through the connecting piece 222, and the sun gear 231 drives the output planetary gear assembly 234 to rotate after being driven by the transmission planetary gear assembly 232. The output planetary gear assembly 234 includes an output planetary carrier 2341, and the output planetary carrier 2341 and the valve stem 21 are integrally formed or assembled and fixed or assembled to limit. 21 is connected with the spool 4 transmission. In this way, the output planetary gear assembly 234 drives the valve stem 21 to rotate through the output planet carrier 2341 , and the valve stem 21 finally drives the valve core 4 to rotate.

Referring to Fig. 1 and Fig. 3, in this embodiment, the spool 4 is a columnar spool, of course as other embodiments, the spool 4 can also be a spherical or spherical or conical spool, and the spool 4 is set to be columnar, It is beneficial to facilitate the processing and molding of the valve core 4 . Define along the axial direction of the spool 4, the end face of the spool 4 close to the output planetary gear assembly 234 is the upper end face, the end face of the spool 4 away from the output planetary wheel assembly 234 is the lower end face, the spool 4 includes a first groove 41, along In the axial direction of the valve core 4 , the first groove 41 is formed inwardly from the upper end surface of the valve core 4 . When the valve stem 21 is connected to the valve core 4 by transmission, at least part of the valve stem 21 is located in the cavity formed by the first groove 41, and the valve stem 21 can abut against the first groove 41 during the rotation, thereby driving the valve core 4 to rotate. .

Referring to Fig. 3 and Fig. 4, the valve core 4 also includes a hole, which forms a mounting cavity and a tunnel, and as far as the single component of the valve core 4 is concerned, the mounting cavity communicates with the tunnel. Along the axial direction of the hole, the installation cavity is closer to the outer peripheral wall of the valve core than the hole, and the opening of the installation cavity is located on the outer peripheral wall of the valve core 4 . The number of holes can be one, two or more. In this embodiment, the valve core 4 includes a first hole 42 and a second hole 43. The first hole 42 forms a first hole 421, a first installation cavity 426 and the second installation cavity 427, the second hole 43 forms the second hole 431 and the third installation cavity 434, as far as the single component of the valve core 4 is concerned, the first hole 421 communicates with the first installation cavity 426 and the second installation cavity Cavity 427, along the axial direction of the first hole 421, the first installation cavity 426 and the second installation cavity 427 are located at both ends of the first hole 421, the second hole 431 communicates with the third installation cavity 434, along the second hole 431 In the axial direction, the third installation cavity 434 is arranged closer to the outer peripheral wall of the valve core 4 than the second hole 431, and the opening of the first installation cavity 426, the opening of the second installation cavity 427, and the opening of the third installation cavity 434 are respectively located on the valve core 4. The outer peripheral wall surface of the second hole 431 communicates with the first hole 421 . In addition, in this embodiment, the central axis of the second hole 43 is perpendicular to or tends to be perpendicular to the central axis of the first hole 42 , and the second hole 43 is located near the middle of the first hole 42 , the first The holes 42 and the second holes 43 are substantially T-shaped. The hole part includes a mounting part, the mounting part forms a mounting cavity, the mounting part includes a side wall and a step part, the side wall can be connected to the step part, and along the axial direction of the hole, the side wall is arranged closer to the opening of the mounting cavity than the step part. In this embodiment, the first hole portion 42 includes a first mounting portion and a second mounting portion, the first mounting portion forms a first mounting cavity 426, the second mounting portion forms a second mounting cavity 427, and the first mounting portion includes a second mounting cavity. A step portion 422 and a first side wall 424, along the axial direction of the first hole 421, the first side wall 424 is arranged closer to the opening of the first installation cavity 426 than the first step portion 422; the second installation portion includes a second step portion 423 and the second side wall 425 , along the axial direction of the first hole 421 , the second side wall 425 is arranged closer to the opening of the second installation cavity 427 than the second stepped portion 423 . The second hole portion 43 includes a third installation portion, the third installation portion forms a third installation cavity 434, the third installation portion includes a third step portion 432 and a third side wall 433, along the axial direction of the second hole 431, the third The side wall 433 is arranged closer to the opening of the third installation cavity 434 than the third step portion 432 . It should be pointed out that Fig. 4 shows a spool 4 applied to a three-way valve, of course the spool is not limited to the embodiment shown in Fig. 4, the spool can also be applied to a two-way valve, a four-way valve or Spools for other multi-way valves.

Referring to Fig. 1, Fig. 5 and Fig. 6, the electric valve 100 also includes a sealing seat 5, which can be integrally injection molded from plastic materials, and the sealing seat 5 includes a first part 51 and a second part 52, and the first part 51 and the second part The two parts 52 are connected, and the central axis of the first part 51 coincides or tends to coincide with the central axis of the second part 52; the first part 51 includes a stepped surface 53, and the stepped surface 53 is formed between the first part 51 and the second part 52 Between; the first part 51 includes an arc-shaped end surface 511, the shape of which is adapted to the side wall surface forming the valve body cavity 30, and at least part of the arc-shaped end surface 511 can be fitted with the side wall surface forming the valve body cavity 30, the arc The shaped end surface 511 can slide and fit with the side wall surface; the seal seat 5 also has a through hole 54 , and the through hole 54 is set through the seal seat 5 . The number of sealing seats 5 may be consistent with the number of installation cavities formed by the holes of the valve core.

Referring to Fig. 3 to Fig. 8, at least part of the sealing seat 5 is located in the installation cavity of the valve core 4, the sealing seat 5 is connected to the installation part of the valve core 4 to fix or to limit the position, and the through hole 54 of the sealing seat 5 communicates with the channel. In the embodiment, the number of sealing seats 5 is three, specifically including the first sealing seat 5a, the second sealing seat 5b, and the third sealing seat 5c. When the sealing seat 5 is assembled with the valve core 4, part of the first sealing seat 5a is located at The first installation cavity 426, the first sealing seat 5a is in interference fit with the first installation part, the through hole 54a of the first sealing seat 5a communicates with the first channel 421, and the central axis of the through hole 54a is connected with the central axis of the first channel 421 The second part 52a of the first sealing seat 5a is located in the first installation cavity 426, the free end surface of the second part 52a abuts against the first stepped part 422, and the second part 52a of the first sealing seat 5a Part of the first part 51a is located in the first installation cavity 426, the peripheral side wall of the first part 51a abuts against the first side wall 424, along the axial direction of the first hole 421, the arc-shaped end surface 511a of the first part 51a protrudes from the The outer peripheral wall surface of the spool 4 is arranged. Similarly, part of the second seal seat 5b is located in the second installation cavity 427, the second seal seat 5b is in interference fit with the second installation part, the through hole 54b of the second seal seat 5b communicates with the first channel 421, and the through hole 54b The central axis coincides or tends to coincide with the central axis of the first hole 421, the second part 52b of the second sealing seat 5b is located in the second installation cavity 427, and the free end surface of the second part 25b abuts against the second stepped part 423, The part of the first part 51b of the second sealing seat 5b is located in the second installation cavity 427, the peripheral side wall of the first part 51b abuts against the second side wall 425, along the axial direction of the first hole 421, the first part 51b The arc-shaped end surface 511b protrudes from the outer peripheral wall of the valve core 4; part of the third sealing seat 5c is located in the third installation cavity 434, the third sealing seat 5c is in interference fit with the third installation part, and the through hole of the third sealing seat 5c 54c communicates with the second hole 431, the central axis of the through hole 54c coincides or tends to coincide with the central axis of the second hole 431, and the second part 52c of the third sealing seat 5c is located in the third installation cavity 434, and the second part 52c The free end surface of the third sealing seat 5c abuts against the third step portion 432, the part of the first part 51c of the third sealing seat 5c is located in the third installation cavity 434, the peripheral side wall of the first part 51c abuts against the third side wall 433, along the first In the axial direction of the second hole 431 , the arc-shaped end surface 511c of the first portion 51c protrudes from the outer peripheral wall surface of the valve core 4 .

Referring to Figure 1, Figure 4 and Figure 8, the electric valve 100 also includes seals 6, the number of seals 6 is consistent with the number of seal seats 5, the seals 6 are located in the installation cavity, and the seals 6 are located in the second part of the seal seat 5 52, the seal 6 abuts against the stepped surface 53 of the seal seat and the stepped portion of the hole respectively, and the seal 6 is pressed between the stepped surface 53 and the stepped portion along the axial direction of the hole, and the seal 6 is in the Sealed and compressed state. In this embodiment, the seal 6 specifically includes a first seal 6a, a second seal 6b, and a third seal 6c, the first seal 6a is located in the first installation cavity 426, and the first seal 6a is located in the first seal On the outer periphery of the second portion 52a of the seat 5a, the first sealing member 6a abuts against the stepped surface 53a of the first sealing seat 5a, and the first sealing member 6a abuts against the first stepped portion 422, along the axial direction of the first hole 421 , the first sealing member 6a is compressed between the step surface 53a of the first sealing seat 5a and the first step portion 422, and the first sealing member 6a is in a sealed and compressed state; similarly, the second sealing member 6b is located on the second The installation cavity 427, the second sealing member 6b is located on the outer periphery of the second portion 52b of the second sealing seat 5b, the second sealing member 6b abuts against the stepped surface 53b of the second sealing seat 5b, the second sealing member 6b and the second step part 423, along the axial direction of the first hole 421, the second sealing member 6b is compressed between the step surface 53b of the second sealing seat 5b and the second step part 423, and the second sealing member 6b is in the sealing compression state. State: the third sealing member 6c is located in the third installation cavity 434, the third sealing member 6c is located on the outer periphery of the second portion 52c of the third sealing seat 5c, and the third sealing member 6c abuts against the stepped surface 53c of the third sealing seat 5c , the third sealing member 6c abuts against the third stepped portion 432, and along the axial direction of the second hole 431, the third sealing member 6c is compressed between the stepped surface 53c of the third sealing seat 5c and the third stepped portion 432 , the third sealing member 6c is in a sealing and pressing state. Setting the seal 6, on the one hand, helps to improve the sealing performance when the seal seat 5 and the valve core 4 are assembled, and reduces the risk of internal leakage; The friction of the arc-shaped end face 511 caused by long-term frequent sliding is beneficial to compensate the wear gap between the two under the action of the elastic force of the seal 6, and ensure the close contact between the arc-shaped end face 511 and the side wall surface forming the valve body cavity 30 together to ensure its sealing performance.

Referring to FIG. 1 and FIG. 9 , the valve body 3 includes an opening 31 , and the opening 31 forms an opening cavity 32 . As for the valve body 3 alone, the opening cavity 32 communicates with the valve body cavity 30 . The spool 4 equipped with the sealing seat 5 and the sealing member 6 is integrally loaded into the valve body cavity 3. In this way, compared with the existing structure, the sealing seat, the sealing member, and the spool are separately loaded into the valve body cavity 30 in sequence, and are subjected to the valve body cavity. 30 is less affected by space constraints, which is conducive to simplifying assembly. Part of the valve part 2 is located in the opening cavity 32 , at least part of the valve stem 21 extends into the valve body cavity 30 , and is located in the groove cavity formed by the first groove 41 of the valve core 4 for transmission connection with the valve core 4 . In this embodiment, the valve component 2 and the valve body 3 are compressed and fixed by the compression nut 7. Specifically, referring to FIG. In the axial direction, the fourth side wall 312 is arranged closer to the opening of the opening cavity 32 than the fourth stepped portion 311, and the fourth side wall 312 is provided with an internal thread section, and correspondingly, the outer peripheral wall of the compression nut 7 is provided with an external thread section , the compression nut 7 is located on the outer periphery of the part of the connection seat 24, at least part of the compression nut 7 is located in the opening cavity 32, and the compression nut 7 is threadedly matched with the fourth side wall 312, so that the flange portion 241 of the connection seat 24 is compressed Between the compression nut 7 and the fourth step portion 311 , the connection and fixation of the valve component 2 and the valve body 3 are realized. Further, there is a sealing arrangement between the valve part 2 and the valve body 3 , which is beneficial to prevent the working fluid from leaking from the assembly gap between the valve part 2 and the valve body 3 .

Referring to Fig. 1 and Fig. 10, the valve body 3 also has passages, and the number of passages may be two or more. In this embodiment, the passages specifically include a first passage 33, a second passage 34, and a third passage 35. For the valve body 3 alone, the first passage 33, the second passage 34 and the third passage 35 communicate with the valve body cavity 30 respectively, the central axis of the first passage 33 coincides or tends to coincide with the central axis of the second passage 34, along In the axial direction of the third passage 35, the first passage 33 and the second passage 34 are located on both sides of the third passage 35, and the central axis of the third passage 35 is the same as the central axis of the first passage 33 and/or the second passage 34. Vertical or tending toward vertical. The valve core 4 equipped with the sealing seat 5 and the sealing member 6 is located in the valve body cavity 30, the lower end surface of the valve core 4 is in contact with the bottom wall forming the valve body cavity 30, and the arc-shaped end surface 511 of at least part of the sealing seat 5 is in contact with the valve body cavity 30. The side wall surfaces are closely fitted to seal the channel, which is beneficial to reduce internal leakage of the working fluid in the channel to the valve body cavity 30 . There is a gap between the outer surface of the spool 4 and the side wall surface forming the valve body cavity 30. In this way, when the driving part 1 drives the spool 4 to rotate through the transmission assembly 23, the driving force is mainly to overcome the arc-shaped end surface 511 and the formation of the valve body cavity. The frictional resistance between the side wall surfaces of 30 is beneficial to reduce the driving force required by the electric valve 100. In addition, referring to FIG. 1 , in this embodiment, the spool 4 further includes a second groove 44 and a chamfered slope 45 , along the axial direction of the spool 4 , the second groove 44 is recessed from the lower end of the spool 4 Formed, the chamfering inclined surface 45 is connected with the outer peripheral wall surface and the lower end surface of the valve core 4 respectively, and the second groove 44 and the chamfering inclined surface 45 are set, which is beneficial to reduce the gap between the lower end surface of the valve core 4 and the bottom wall forming the valve body chamber 30. The contact area reduces the friction loss between the valve core 4 and the bottom wall during the rotation process, and reduces the friction resistance at the same time.

Referring to Fig. 10 to Fig. 12, during the rotation of the spool 4, the hole of the spool 4 can communicate with the channel of the valve body 3. In this embodiment, the electric valve 100 includes but not limited to three working modes, when the spool 4 When turning to the first position shown in Figure 10, the third channel 35 communicates with the first channel 33 and the second channel 34 through the first hole 421 and the second hole 431, specifically, at this time, the third channel 35 passes through The through hole 54c of the third sealing seat communicates with the second channel 431, the first channel 33 communicates with the first channel 421 through the through hole 54a of the first sealing seat, and the second channel 34 communicates with the first channel 421 through the through hole 54b of the second sealing seat. A hole 421 communicates, and the first hole 421 communicates with the second hole 431; when the valve core 4 rotates to the second position shown in Figure 11, the third channel 35 passes through the first hole 421 and the second hole 431 and the first channel 33 communicates, specifically, the third channel 35 communicates with the first channel 421 through the through hole 54b of the second sealing seat, the first channel 33 communicates with the second channel 431 through the through hole 54c of the third sealing seat, and the first channel 421 Communicate with the second hole 431; when the valve core 4 rotates to the third position shown in Figure 12, the third channel 35 communicates with the second channel 34 through the first hole 421 and the second hole 431, specifically, the third channel 35 communicates with the first channel 421 through the through hole 54a of the first seal seat, the second channel 34 communicates with the second channel 431 through the through hole 54c of the third seal seat, and the first channel 421 communicates with the second channel 431 . It should be pointed out that Fig. 10 to Fig. 12 show examples of the working mode of the three-way valve. Of course, the electric valve is not limited to the three-way valve shown in Fig. 10 to Fig. 12, and the electric valve can also be a two-way valve , four-way valve or other multi-way valves.

Referring to Fig. 13 to Fig. 15, it is the second embodiment of the electric valve. Compared with the first embodiment, the difference between the second embodiment and the first embodiment is that in the second embodiment, the hole of the spool 4' is also Including the positioning groove 46, along the axial direction of the hole, the positioning groove 46 is formed by inward depression from the end surface of the step part, and the cavity formed by the positioning groove 46 can be connected with the hole or not. Correspondingly, the sealing seat 5' also includes a raised portion 55, which is formed to protrude from the free end face of the second portion 52 in a direction away from the free end face along the axial direction of the through hole 54. In this embodiment, Among them, the number of protrusions 55 of the seal seat 5 is two and symmetrically distributed, and the number of protrusions 55 is consistent with the number of positioning grooves 46. When the seal seat 5' is assembled with the valve core 4', the protrusions 55 Each is located in the cavity formed by the positioning groove 46 , and the free end surface of the second part 52 abuts against the stepped part. By setting the positioning groove 46 and the raised portion 55, on the one hand, when the sealing seat 5' is assembled with the valve core 4', it is convenient to locate and install the sealing seat 5', so that the arc-shaped end surface 511 of the sealing seat 5' is formed with the The side wall of the valve body cavity 30 is compatible; on the other hand, it is beneficial to limit the rotation of the sealing seat 5 ′ during the sliding process relative to the side wall forming the valve body cavity 30 , so as to ensure its sealing performance. Other structures in the second implementation manner are not different from those in the first implementation manner, and will not be repeated here.

Referring to Figures 1 to 15, the assembly method of the electric valve is further described, and the assembly method of the electric valve includes the following steps:

The seal 6 is sleeved on the outer periphery of the part of the seal seat 5, specifically, the seal 6 is sleeved on the outer periphery of the second part 52 of the seal seat 5;

Put the sealing seat 5 sleeved with the sealing member 6 into the installation cavity of the valve core 4, make the sealing seat 5 and the installation part fixed or limited in assembly, and press the sealing member 6 on the step of the sealing seat 5 Between the surface 53 and the stepped part of the hole, specifically, the sealing seat 5 and the installation part can be fixed by interference fit;

Put the valve core 4 equipped with the sealing seat 5 and the sealing member 6 into the valve body cavity 30 of the valve body 3 as a whole, and make the arc-shaped end surface 511 of the sealing seat 5 closely adhere to the side wall surface forming the valve body cavity 30;

After completing the assembly of the valve part 2, the valve stem 21 of the valve part 2 is inserted into the groove cavity formed by the first groove 41 of the valve core 4, and the valve part 2 and the valve body 3 are assembled and fixed or limited, specifically , the valve part 2 and the valve body 3 can be compressed and fixed by the compression nut 7;

Complete the assembly of the driving part 1, set the driving part 1 on the outer periphery of the part of the valve part 2, and assemble and fix the driving part 1 and the valve body 3 or limit the assembly. Specifically, the driving part 1 and the valve body 3 can be screwed fixed.

It should be noted that: the above embodiments are only used to illustrate the present application and not limit the technical solutions described in the present application, such as "front", "rear", "left", "right", "upper", "lower" The definition of isodirectionality, although this specification has described the application in detail with reference to the above-mentioned embodiments, those of ordinary skill in the art should understand that those skilled in the art can still make modifications or equivalent replacements to the application, All technical solutions and their improvements that do not deviate from the spirit and scope of the present application shall fall within the scope of the claims of the present application.

Claims (10)

1. An electric valve, comprising a valve body, a valve core and a sealing seat, characterized in that: the valve body has a valve body cavity and a passage, the valve core has a tunnel and an installation cavity, at least part of the sealing seat is located in the In the installation chamber, the sealing seat is fixedly connected with the valve core or limited in position, the sealing seat has a through hole, the through hole is set through the sealing seat, the through hole communicates with the channel, the The sealing seat and the valve core are located in the valve body cavity, and the through hole and the channel can communicate with two or more of the channels. 2. The electric valve according to claim 1, wherein the sealing seat includes an arc-shaped end surface, the valve core includes a hole, and the hole forms the installation cavity and the tunnel, and the hole The part includes a mounting part, the mounting part forms the mounting cavity, along the axial direction of the hole, the mounting cavity is arranged closer to the outer peripheral wall of the valve core than the hole, and the opening of the mounting cavity is located in the The outer peripheral wall of the valve core; the sealing seat is in interference fit with the installation part, at least part of the arc-shaped end surface is in close contact with the side wall surface forming the valve body cavity, and the arc-shaped end surface can be in contact with the side wall surface forming the valve body cavity. The side wall surfaces of the body cavity are a sliding fit. 3. The electric valve according to claim 2, wherein the sealing seat includes a first part and a second part, the first part and the second part are connected, and the central axis of the first part Coinciding or tending to coincide with the central axis of the second part, the first part includes the arc-shaped end surface; the mounting part includes a stepped part and a side wall, and along the axial direction of the hole, the side wall The opening of the installation cavity is arranged closer to the step than the step; the second part is located in the installation cavity, the free end surface of the second part is in contact with the step, and part of the first part is located in the In the installation cavity, the peripheral side wall of the first part abuts against the side wall of the installation part, and the arc-shaped end surface protrudes from the outer peripheral wall surface of the valve core along the axial direction of the hole. 4. The electric valve according to claim 3, characterized in that: the hole part further includes a positioning groove, and along the axial direction of the hole, the positioning groove is formed inwardly from the end surface of the step part; The sealing seat further includes a protruding part, which protrudes from the free end face of the second part in a direction away from the free end face along the axial direction of the through hole, and the protruding part is located at the The cavity formed by the positioning groove. 5. The electric valve according to claim 3 or 4, characterized in that: the electric valve also includes a seal, the first part includes a stepped surface, the seal is located in the installation cavity, and the seal Located on the outer periphery of the second part, the sealing element abuts against the stepped portion, the sealing element abuts against the stepped surface, and the sealing element is pressed against the between the stepped surface and the stepped portion. 6. The electric valve according to claim 5, wherein the spool includes a first groove, a second groove and a chamfered slope, and along the axial direction of the spool, the first groove The upper end surface of the valve core is recessed inwardly, the second groove is formed inwardly from the lower end face of the valve core, and the chamfered slope connects the outer peripheral wall surface of the valve core and the lower surface of the valve core. End surface; the electric valve also includes a valve stem, at least part of the valve stem is located in the groove cavity formed by the first groove, and the lower end surface of the valve core is in contact with the bottom wall forming the valve body cavity. 7. The electric valve according to any one of claims 2-6, characterized in that: the hole includes a first hole and a second hole, the first hole forms a first channel, a first installation cavity and a second installation cavity, along the axial direction of the first channel, the first installation cavity and the second installation cavity are located at both ends of the first channel, and the second hole forms a second channel and a third installation cavity, along the axial direction of the second hole, the third installation cavity is arranged closer to the outer peripheral wall of the valve core than the second hole, and the first hole communicates with the second hole , the central axis of the second hole is perpendicular to or tends to be perpendicular to the central axis of the first hole; The sealing seat includes a first sealing seat, a second sealing seat and a third sealing seat, part of the first sealing seat is located in the first installation cavity, and the through hole of the first sealing seat is connected to the first channel communicated; part of the second sealing seat is located in the second installation cavity, the through hole of the second sealing seat communicates with the first channel, and part of the third sealing seat is located in the third installation cavity. The through hole of the third sealing seat communicates with the second channel. 8. The electric valve according to claim 7, wherein the passage includes a first passage, a second passage and a third passage, and the central axis of the first passage coincides with the central axis of the second passage Or tend to coincide, the central axis of the third channel is perpendicular or tends to be perpendicular to the central axis of the first channel and/or the central axis of the second channel, along the axial direction of the third channel, the The first channel and the second channel are located on both sides of the third channel, and the third channel can pass through the first channel and the second channel and the first channel and/or the second channel The two channels are connected. 9. An assembly method of an electric valve, characterized in that: the assembly method comprises the following steps: Install at least part of the sealing seat into the installation cavity of the valve core; assemble and fix the sealing seat with the valve core or limit the assembly; install the valve core equipped with the sealing seat into the valve body as a whole valve body cavity. 10. The assembly method according to claim 9, characterized in that: the assembly method further comprises: The seal is sleeved on the outer periphery of the part of the seal seat; the seal seat sleeved with the seal is pressed into the installation cavity together, so that the seal is pressed tightly on the seal seat Between the stepped surface of the installation cavity and the stepped portion forming the installation cavity; the valve core equipped with the sealing seat and the sealing element is integrally installed into the valve body cavity.

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