CN110630751A

CN110630751A - Fluid control valve

Info

Publication number: CN110630751A
Application number: CN201810787833.5A
Authority: CN
Inventors: 不公告发明人
Original assignee: Zhejiang Sanhua Refrigeration Group Co Ltd
Current assignee: Zhejiang Sanhua Commercial Refrigeration Co ltd
Priority date: 2018-06-21
Filing date: 2018-07-17
Publication date: 2019-12-31
Anticipated expiration: 2038-07-17
Also published as: CN110630751B

Abstract

The invention relates to a fluid control valve, which comprises a control component and a valve body component, wherein the valve body component comprises a valve body, a valve seat, a valve rod and a valve core, the valve seat is fixedly arranged in an inner cavity of the valve body component, the valve core is arranged in the inner cavity, one side of the valve seat, facing the valve core, is provided with a valve port, the cross section of the valve port is circular, the valve rod comprises a rod body and a transmission plate, the rod body is in transmission connection with the control component, the transmission plate is connected with the valve core, the valve rod can drive the valve core to rotate so as to abut against or be far away from the valve port, the valve core comprises a spherical surface, the spherical center of the spherical surface deviates from the central axis of the rod body, and when the spherical surface abuts against the valve port. The valve core with the spherical surface is matched with the circular valve port, so that the sealing reliability of the valve core and the valve port can be improved.

Description

Fluid control valve

Technical Field

The invention relates to the technical field of fluid control, in particular to a fluid control valve.

Background

Under the driving of the unit fan of the central air conditioner, the air of the room is cooled (heated) by the water in the coil pipe to exchange heat, so as to keep the temperature of the room stable. In the fan coil of the central air conditioner, the fluid control valve controls the on-off of cold (hot) water by the matching of the valve core and the valve port.

Fig. 18 is a schematic structural diagram of a fluid control valve in the background art in a valve closing state, and as shown in fig. 18, the fluid control valve includes a valve body 01, a valve rod 02, a valve core 03, and a valve seat 04, the valve seat 04 is provided with a valve port 05, the valve rod 02 is fixedly connected with the valve core 03, the valve core 03 deviates from a central axis of the valve rod 02, the valve rod 02 rotates to drive the valve core 03 to swing, and since a portion 06 of the valve core 02, which is engaged with the valve port 05, is a plane, a sealing effect between the valve core 03 and the valve port 05 is affected by dimensional accuracy of relative positions of the.

In view of this, how to improve the sealing effect between the valve element and the valve port so that the valve element is not easily affected by the dimensional accuracy of the relative position between the valve element and the valve port provides an improved subject for those skilled in the art.

Disclosure of Invention

The invention aims to provide a fluid control valve, which can improve the sealing reliability of a valve core and a valve port.

In order to solve the technical problem, the invention provides a fluid control valve, which comprises a control component and a valve body component, wherein the valve body component comprises a valve body, a valve seat, a valve rod and a valve core, the valve seat is fixedly arranged in an inner cavity of the valve body component, the valve core is arranged in the inner cavity, a valve port is arranged on one side, facing the valve core, of the valve seat, the cross section of the valve port is circular, the valve rod comprises a rod body and a transmission plate, the rod body is in transmission connection with the control component, the transmission plate is connected with the valve core, the valve rod can drive the valve core to rotate so as to abut against or be far away from the valve port, the valve core comprises a spherical surface, the spherical center of the spherical surface deviates from the central axis of the rod body, and when the spherical surface abuts against the valve port.

The fluid control valve provided by the invention comprises a control component and a valve body component, wherein the valve body component comprises a valve seat, a valve rod and a valve core, the valve seat is provided with a valve port, the valve core comprises a spherical surface, the spherical center of the spherical surface deviates from the central axis of a rod body of the valve rod, when the spherical surface is abutted against the valve port, the spherical center of the spherical surface is approximately positioned on the central axis of the valve port, and the spherical surface of the valve core and the valve port can be well sealed.

Drawings

FIG. 1 is an overall view of a fluid control valve according to one embodiment of the present invention;

FIG. 2 is a schematic diagram of the structure of the control unit of FIG. 1;

FIG. 3 is a cross-sectional view 1/4 of the valve body component of FIG. 1;

FIG. 4a is a schematic view of a valve cartridge;

FIG. 4b is a cross-sectional view of the valve cartridge of FIG. 4 a;

FIG. 5 is a schematic view of a drive plate construction;

FIG. 6 is an assembled schematic view of the lever, the valve cartridge of FIG. 4a, and the drive plate of FIG. 5;

FIG. 7a is a schematic view of another valve cartridge configuration;

FIG. 7b is a cross-sectional view of the valve cartridge of FIG. 7 a;

FIG. 8a is a schematic view of a third valve cartridge;

FIG. 8b is a cross-sectional view of the valve cartridge of FIG. 8 a;

FIG. 9 is a schematic view of another drive plate configuration;

FIG. 10 is an assembled schematic view of the lever, the valve cartridge of FIG. 4a, and the drive plate of FIG. 9;

FIG. 11 is a schematic view of an open state of the fluid control valve provided in the present invention;

FIG. 12 is a schematic illustration of a closed valve state of a fluid control valve provided in accordance with the present invention;

FIG. 13 is a schematic view of the valve body of FIG. 1 shown in a state prior to staking with the valve seat;

FIG. 14 is an enlarged schematic view at A in FIG. 13;

FIG. 15 is a schematic view of the valve body of FIG. 1 after staking to the valve seat;

FIG. 16 is an enlarged schematic view at B in FIG. 15;

FIG. 17 is a schematic view of the valve seat of FIG. 1;

fig. 18 is a schematic diagram of a closed state of a background art fluid control valve.

In the accompanying fig. 1-17, the reference numerals are illustrated as follows:

1-control part, 11-shell, 12-motor, 121-output shaft, 13-connecting seat, 131-groove; 2-valve body part, 21-valve body, 211-fluid inlet, 212-fluid outlet, 22-valve seat, 222-valve port, 223-annular flange, 224-annular recess, 23-valve stem, 231-key shaft part, 232-transverse through groove, 233-rod, 234-rivet, 24-valve core, 241-spherical part, 2411-spherical surface, 243-columnar part, 244-flange part, 245-protrusion part, 246/246' -conical surface, 247-through groove, 25-valve seat hole, 251-extension part, 252-counter bore, 26-driving plate, 261-mounting hole, 262-rivet hole, 263-one side end of driving plate, 264-another side end of driving plate, 265-clamping groove, 27-sealing ring.

Detailed Description

In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1-17, fig. 1 is a general view of a fluid control valve according to an embodiment of the present invention; FIG. 2 is a schematic diagram of the structure of the control unit of FIG. 1; FIG. 3 is a cross-sectional view 1/4 of the valve body component of FIG. 1; FIG. 4a is a schematic view of a valve cartridge; FIG. 4b is a cross-sectional view of the valve cartridge of FIG. 4 a; FIG. 5 is a schematic view of a drive plate construction; FIG. 6 is an assembled schematic view of the lever, the valve cartridge of FIG. 4a, and the drive plate of FIG. 5; FIG. 7a is a schematic view of another valve cartridge configuration; FIG. 7b is a cross-sectional view of the valve cartridge of FIG. 7 a; FIG. 8a is a schematic view of a third valve cartridge; FIG. 8b is a cross-sectional view of the valve cartridge of FIG. 8 a; FIG. 9 is a schematic view of another drive plate configuration; FIG. 10 is an assembled schematic view of the lever, the valve cartridge of FIG. 4a, and the drive plate of FIG. 9; FIG. 11 is a schematic view of an open state of the fluid control valve provided in the present invention; FIG. 12 is a schematic illustration of a closed valve state of a fluid control valve provided in accordance with the present invention; FIG. 13 is a schematic view of the valve body of FIG. 1 shown in a state prior to staking with the valve seat; FIG. 14 is an enlarged schematic view at A in FIG. 13; FIG. 15 is a schematic view of the valve body of FIG. 1 after staking to the valve seat; FIG. 16 is an enlarged schematic view at B in FIG. 15; fig. 17 is a schematic view of the structure of the valve seat of fig. 1.

As shown in fig. 1 and fig. 2, the fluid control valve provided in this embodiment includes a control component 1 and a valve body component 2, the control component 1 includes a housing 11, a motor 12, and a connecting seat 13, the motor 12 is fixedly disposed in the housing 11, the motor 12 includes an output shaft 121, the output shaft 121 is in transmission connection with the connecting seat 13, that is, the output shaft 121 rotates to drive the connecting seat 13 to rotate by powering on the motor 12. The connecting base 13 extends out of the outer surface of the housing 11, the connecting base 13 is circumferentially rotatable and axially limited in the housing 11, a groove 131 is formed in one end of the connecting base 13 facing the valve body component 2, the cross section of the groove 131 is non-circular, and in the embodiment, the groove 131 is a kidney-shaped counter bore.

As shown in fig. 3, 4a, 4b, 5, 6, 11, and 12, the valve body member 2 includes a valve body 21, a valve seat 22, a valve stem 23, and a valve element 24, and the valve body 21 includes a fluid inlet 211, a fluid outlet 212, and a valve seat hole 25. The valve seat 22 is substantially cylindrical and is fixedly arranged in the valve seat hole 25, one end of the valve seat 22 close to the valve core 24 is provided with a valve port 222, and the cross section of the valve port 222 is circular. The valve core 24 comprises a spherical surface 2411 which is matched and sealed with the valve port 222, and the diameter of the spherical surface 2411 is 2-5mm larger than that of the valve port 222, so that the spherical surface 2411 of the valve core 24 and the valve port 222 can be ensured to be reliably sealed. The spherical surface is a spherical surface, and may be the surface of the whole sphere or a part of the surface of the whole sphere, such as a spherical cap. The valve rod 23 includes a rod 233 and a transmission plate 26, the spherical center of the spherical surface 2411 deviates from the central axis of the rod 233, i.e., the valve core 24 and the valve rod 23 are eccentrically arranged, and the central axis of the rod 233 is perpendicular to the central axis of the valve port 222, so that the rod 233 ensures that the valve core 24 moves on the same horizontal plane during the rotation process, and the valve core 24 and the valve port 222 are easily sealed in a matching manner. In addition, one end of the rod body 233 facing the control component 1 is provided with a key shaft 231, the cross section of the key shaft 231 is non-circular, in the embodiment, the cross section of the key shaft 231 is waist-shaped, the key shaft 231 is in keyway connection with the groove 131, and the other end of the rod body 233 is provided with a transverse through groove 232. The driving plate 26 is made of a metal plate by stamping, and is substantially rectangular, at least 2 rivet holes 262 are formed in one end portion of the driving plate 26, one side end portion 263 provided with the rivet holes 262 is placed in the transverse through groove 232, the driving plate 26 is fixed to the rod body 233 through the rivets 234, the driving plate 26 is clamped with the valve core 24, the valve rod 23 can drive the valve core 24 to rotate so as to abut against or be away from the valve port 222, and when the spherical surface 2411 abuts against the valve port 222, the spherical center of a ball where the spherical surface 2411 is located is substantially located on the central axis of the valve port 222.

In the above embodiment, the valve seat 22 is provided with the valve port 222, the cross section of the valve port 222 is circular, and the "cross section" refers to a cross section cut parallel to the bottom surface, i.e., the exposed portion, i.e., the portion of the valve port 222 abutting against the valve element 24 is circular. The valve core 24 is provided with the spherical surface 2411, and the spherical surface 2411 of the valve core 24 is sealed with the valve port 222, compared with the sealing surface of the valve core and the valve port in the background technology which is a plane, the embodiment is easier to be attached and sealed, and the sealing reliability of the valve core 24 and the valve port 222 can be improved.

Further, as shown in fig. 5 and 6, the transmission plate 26 is provided with an installation hole 261, the installation hole 261 in this embodiment is a circular hole, one end 263 of the transmission plate 26 is fixedly connected with the rod body 233 through a rivet 234, the valve core 24 includes a columnar portion 243, a spherical portion 241 located on one side of the columnar portion 243, and a flange portion 244 located on the other side of the columnar portion 243, the columnar portion 243 penetrates through the installation hole 261, and the spherical portion 241 includes the spherical surface 2411. Specifically, in the present embodiment, a hemisphere is used as the spherical portion 241, but it is needless to say that a circular truncated cone may be used as the spherical portion 241, that is, a piece of the spherical portion is cut out on the basis of the hemisphere, and the circumferential outer edge surface of the circular truncated cone is used as the spherical surface 2411, which can also achieve reliable sealing with the valve port 222. In this embodiment, the valve core 24 and the transmission plate 26 are clamped.

Further, as shown in fig. 4a, 4b, 5, and 12, when the height of the columnar portion 243 is defined as H and the thickness of the transmission plate 26 is defined as T, the following requirements are satisfied: H-T is more than or equal to 0.5mm and less than or equal to 2 mm; when the outer diameter of the columnar part is defined as D1, the diameter of the mounting hole is defined as D2, and the maximum outer diameter of the flange part is defined as D3, the following requirements are satisfied: d2 is more than D1 and more than D3, D3-D2 is more than or equal to 2mm and less than or equal to 3mm, and D2-D1 is more than or equal to 1mm and less than or equal to 3 mm. With such an arrangement, after the valve core 24 and the transmission plate 26 are installed, the valve core 24 will not be separated from the transmission plate 26, and in addition, the valve core 24 has a movement clearance in both the axial direction and the radial direction relative to the installation hole 261, so that the valve core 24 can automatically adjust the position relative to the valve port 222 under the driving of the rotation of the valve rod 23 during the valve closing process of the fluid control valve, thereby ensuring the sealing reliability with the valve port 222. The set specific clearance can sufficiently compensate for the manufacturing and assembling errors of the parts, reduce the precision requirement on the part processing, improve the manufacturing efficiency and reduce the manufacturing cost.

As shown in fig. 7a and 7b, the flange portion 244 includes at least 2 protrusions 245 extending in the radial direction, and the protrusion 245 has a tapered surface 246 with a gradually increasing diameter on a side away from the spherical portion 241, where the gradually increasing diameter means that the diameter of the tapered surface 246 increases as the side closer to the spherical portion 241. The valve core 24 is made of a compressible material, and specifically, the valve core 24 is integrally formed by a rubber material in this embodiment. The valve core 24 has the advantages that the protruding portion 245 is compressed and deformed radially inwards under the guiding action of the conical surface 246, namely the protruding portion 245 made of rubber materials is deformed inwards after extrusion, the outer diameter of the protruding portion 245 is reduced, the protruding portion can penetrate through the installation hole 261, radial force disappears after the protruding portion 245 penetrates through the installation hole, the outer diameter of the protruding portion 245 is restored to the original size, the valve core 24 cannot fall off in the rotating process, the valve core 24 and the transmission plate 26 are convenient to install, the rubber materials are soft materials, the valve core 24 is enabled to be attached to the valve port 222 more easily, and sealing performance is improved.

Of course, as shown in fig. 8a and 8b, a modified design may be adopted, in which at least 2 through grooves 247 are formed in the circumferential outer edge of the flange portion 244 so as to extend in the axial direction, and a tapered surface 246 'having a gradually increasing diameter is formed on the side of the flange portion 244 away from the spherical portion 241, where the gradually increasing diameter means that the diameter of the tapered surface 246' is increased as the side is closer to the spherical portion 241. In the process that the flange portion 244 of the present embodiment is pressed into the mounting hole 261, the flange portion can be compressed and deformed toward the through groove 247, and the beneficial effects are the same as above and are not described herein again.

As shown in fig. 9, the transmission plate 26 further includes a catching groove 265, the catching groove 265 penetrates the other side end 264 of the transmission plate 26 and the mounting hole 261, that is, the catching groove 265 communicates with the mounting hole 261 of the transmission plate 26, so that the column portion 243 of the spool 24 can be press-fitted into the mounting hole 261 through the catching groove 265, and if the minimum width of the catching groove 265 is defined as W, the outer diameter of the column portion 243 is defined as D1, and the diameter of the mounting hole 261 is defined as D2, the following requirements are satisfied: w < D1 < D2 has the advantage that after the columnar part 243 is installed in the installation hole 261 through the clamping groove 265, the valve core 24 cannot be separated from the transmission plate 26.

Further, as shown in fig. 13, the valve body 21 further includes a limiting portion for limiting an axial position of the valve seat 22 in the valve seat hole 25, so that the valve seat 22 can be prevented from moving outward in the valve seat hole 25 along the axial direction thereof under a service condition that the valve element 24 frequently applies a load force to the valve seat in a rotation process for a long time, and the fixing reliability between the valve seat 22 and the valve seat hole 25 is improved, thereby preventing the valve seat from being loosened.

Where "outer" refers to the side of the valve seat 22 that is installed when installed, the side distal to the insert 24, and correspondingly "inner" refers to the side proximal to the insert 24, i.e., the side opposite the "outer".

In the above-described embodiment, as shown in fig. 13, 14, 15, and 16, the stopper portion includes the first stopper provided on the outer end surface of the valve seat hole 25, and the first stopper may press the outer end surface of the valve seat 22 after the valve seat 22 is fitted into the valve seat hole 25. Due to the first stopper, even if the valve seat 22 is acted by the valve core 24, the valve seat does not move axially outward relative to the valve seat hole 25 (the left side in fig. 13 or 15 is "outward") in the long-term use, that is, the first stopper forms a part of the above-mentioned stopper portion or stopper portion in the present embodiment. Of course, in this embodiment, the first stopper may be disposed at other positions, such as other positions of the valve body 21, as long as it can limit the outward movement of the valve seat 22 in the axial direction after the valve seat 22 is installed in the valve seat hole 25.

In the above embodiment, specifically, the first stopper is provided as the extension 251 provided circumferentially along the outer end of the valve seat hole 25 and caulkable to the outer end surface of the valve seat 22. That is, as shown in fig. 10, after the valve seat 22 is fitted into the valve seat hole 25, the extension portion 251 is press-riveted to the outer end surface of the valve seat 22 in the axial direction, so that the axial position of the valve seat 22 is defined and the valve seat 22 is prevented from moving outward in the axial direction. The extension 251 may be an integral structure disposed along the circumferential direction, or may be a plurality of split structures disposed at intervals along the circumferential direction.

After the valve seat 22 is installed in the valve seat hole 25, the axial position of the valve seat 22 can be fixed by the fixing tool, and then the extending portion 251 is riveted on the outer end surface of the valve seat 22, so that the axial force is prevented from being applied to the valve seat 22 to enable the valve seat 22 to move inwards in the process of bending and riveting the extending portion 251. In addition, fixing the axial position of the valve seat 22, i.e., the final assembled position of the valve seat 22, when the extension 251 is swaged, ensures the engagement with the valve element 24.

Further, the limiting portion may also be used to limit the valve seat 22 from moving inward in the valve seat hole 25 along the axial direction thereof, in this embodiment, the limiting portion further includes a second stopper extending outward in the radial direction along the outer end peripheral surface of the valve seat 22 and closely attached to the outer end surface of the valve seat hole, so that the valve seat 22 is limited from moving inward in the axial direction, that is, in this embodiment, the first stopper and the second stopper provided on the valve seat 22 cooperate to form the limiting portion to limit the valve seat 22 from moving in the axial direction thereof in the valve seat hole 25. The second stopper is disposed at the outer end of the valve seat 22, so that the valve seat 22 can be easily installed, for example, after the valve seat 22 is installed in the valve seat hole 25 until the second stopper abuts against the outer end surface of the valve seat hole 25, the first stopper is pressed against the outer end surface of the valve seat 22.

In addition, the second stopper may also fix the distance between the inner end surface of the valve seat 22 and the valve element 24, and during the installation process, no additional fixing tool is needed, and the second stopper may ensure the axial position of the valve seat 22 to be fixed, may prevent the valve seat 22 from moving inwards when the extension 251 is bent and riveted, and may ensure the distance between the inner end surface of the valve seat 22 and the valve element 24, so as to ensure the good matching between the valve element 24 and the valve port 222, and further achieve the on-off of the fluid flowing through the valve port 222. Meanwhile, the second stopper can also limit the inward movement of the valve seat 22 in the use process, so that the phenomenon that the valve core 24 collides with the valve seat 22 to push the valve seat 22 outwards in the rotation process and loosens after long-time use due to the fact that the valve seat 22 moves axially inwards is avoided.

In the above embodiment, as shown in fig. 17, the second stopper is an annular flange 223 circumferentially disposed along the outer end of the valve seat 22, and the annular flange 223 abuts against the outer end surface of the valve seat hole 25, in this case, the first stopper can limit the valve seat 22 by pressing the annular flange 223, and when the first stopper is the extension 251, the extension 251 can wrap around the edge of the annular flange 223 to form a flange, as shown in fig. 16, so as to achieve riveting fixation. Of course, the second stopper may also be a plurality of stoppers circumferentially disposed along the outer end of the valve seat 22, and each stopper abuts against the outer end surface of the valve seat hole, at this time, the extension portion 251 is disposed as a split structure disposed at intervals, and riveted on each stopper in a one-to-one correspondence.

In the above embodiment, as shown in fig. 14 and 16, a counter bore 252 adapted to the annular flange 223 is further provided on the outer end surface of the valve seat hole 25, and the annular flange 223 is located in the counter bore 252, wherein an axial distance between the outer end surface of the valve seat hole and the bottom of the counter bore 252 is not greater than a thickness of the annular flange 223, so that the annular flange 223 is limited by the first stopper, for example, when the first stopper is the extension 251, the extension 251 may be extended along an inner side wall of the counter bore 252, and the annular flange 223 is flush with the outer end surface of the valve seat hole or protrudes from the outer end surface of the valve seat hole, so that the riveting fixation thereof by the extension 251 is facilitated.

In the above embodiment, at least one of the outer side wall of the valve seat 22 abutting against the valve seat hole 25 and the inner side wall of the valve seat hole 25 abutting against the valve seat 22 is provided with the annular recessed portion 224, and the seal ring 3 is placed in the annular recessed portion 224, and the seal ring 3 provides a circumferential seal between the valve seat 22 and the valve seat hole 25. Therefore, the fluid control valve can avoid the situation that fluid passes between the valve seat 22 and the valve seat hole 25 during the use process, namely, internal leakage happens, and the normal use of the fluid control valve is further ensured. Of course, the circumferential seal may also be achieved by interference fit between the valve seat 22 and the valve seat 2, or the like. The scheme of being equipped with annular concave part 224 and sealing washer 3 makes the cooperation between valve seat 22 and the valve seat hole 25 be clearance fit can, for interference fit's scheme, can reduce the machining precision of valve seat hole 25 and the valve seat 22 outer fringe, reduces manufacturing cost to when the installation, need not to rely on external force etc. can install, the installation technology is comparatively simple.

In the above embodiment, specifically, as shown in fig. 17, the annular recess 224 is provided on the outer side wall of the valve seat 22. When the valve seat 22 is mounted, the seal ring 27 is directly fitted into the annular recess 224 of the outer wall of the valve seat 22, and then the valve seat 22 is inserted into the valve seat hole 25. Of course, the annular concave portion 224 may also be disposed on the inner side wall of the valve seat hole 25, or the annular concave portion 224 may be disposed to include a first groove disposed on the outer side wall of the valve seat 22 and a second groove disposed on the inner side wall of the valve seat hole 25, wherein the first groove and the second groove are adapted, and when the valve seat 22 is installed in the valve seat hole 25, the first groove and the second groove may just enclose to form a cavity for placing the sealing ring 3. The arrangement of the annular recess 224 on the outer wall of the valve seat 22 facilitates installation relative to the latter two annular recess 224 designs described above.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.

Claims

1. A fluid control valve comprises a control component and a valve body component, wherein the valve body component comprises a valve body, a valve seat, a valve rod and a valve core, the valve seat is fixedly arranged in an inner cavity of the valve body component, the valve core is arranged in the inner cavity, one side of the valve seat, facing the valve core, is provided with a valve port, the cross section of the valve port is circular, the valve rod comprises a rod body and a transmission plate, the rod body is in transmission connection with the control component, the transmission plate is connected with the valve core, the valve rod can drive the valve core to rotate so as to abut against or be far away from the valve port, the valve core comprises a spherical surface, the spherical center of the spherical surface deviates from the central axis of the rod body, and when the spherical surface abuts against the valve port, the spherical center.

2. The fluid control valve of claim 1, wherein the actuator plate includes a mounting hole, the actuator plate is fixedly coupled to the stem, the valve element includes a cylindrical portion, a spherical portion on one side of the cylindrical portion, and a flange portion on the other side of the cylindrical portion, the cylindrical portion extends through the mounting hole, the spherical portion includes the spherical surface, and the valve element is snap-fitted to the actuator plate.

3. The fluid control valve according to claim 2, wherein if the height of the columnar portion is defined as H and the thickness of the transmission plate is defined as T, then: H-T is more than or equal to 0.5mm and less than or equal to 2 mm; if the outer diameter of the columnar part is defined as D1 and the diameter of the mounting hole is defined as D2, the following conditions are satisfied: d1 is more than or equal to D2, and D2-D1 are more than or equal to 1mm and less than or equal to 3 mm.

4. The fluid control valve of claim 2, wherein said flange portion includes at least 2 radially extending projections, wherein a side of said projections remote from said ball portion is tapered, and wherein said spool is integrally formed of a rubber material.

5. The fluid control valve of claim 2, wherein said flange portion includes an axially extending through slot, a tapered surface is provided on a side of said flange portion remote from said ball portion, and said spool is integrally formed of a rubber material.

6. The fluid control valve of claim 2, wherein the actuator plate further comprises a slot in communication with the mounting hole, and wherein if the minimum width of the slot is defined as W, the outer diameter of the cylindrical portion is defined as D1, and the diameter of the mounting hole is defined as D2, then: w < D1 < D2.

7. The fluid control valve according to any one of claims 1 to 6, wherein the control member comprises a motor, a connecting seat drivingly connected to an output shaft of the motor, the connecting seat has a recess at an end facing the valve body, the rod has a key shaft portion at an end facing the control member, the key shaft portion is engaged with the recess key groove, the rod has a transverse through groove at another end, a rivet hole is formed at one side end of the driving plate, one side end of the driving plate is disposed in the transverse through groove, the rod and one side end of the driving plate are riveted by a rivet, and a central axis of the rod is perpendicular to a central axis of the valve port.

8. The fluid control valve of any one of claims 1-6, wherein the valve body comprises a valve seat bore, an outer end surface of the valve seat bore is circumferentially provided with an axially outwardly extending extension that is snap-fit with the outer end surface of the valve seat to limit axially outward movement of the valve seat within the valve seat bore; the outer end circumference of disk seat is equipped with annular flange, the outer terminal surface in disk seat hole be equipped with the counter bore of annular flange looks adaptation, annular flange is located in the counter bore with the restriction the disk seat is in the disk seat is downthehole along its axial inwards movement, just the outer terminal surface in disk seat hole arrives axial distance between the bottom of counter bore is not more than annular flange's thickness.