CN218598938U - Valve seat assembly, proportional solenoid valve and breathing machine - Google Patents

Abstract

The utility model discloses a valve seat assembly, a proportional solenoid valve and a ventilator, wherein the valve seat assembly includes a valve seat, a valve core, a moving armature, shrapnel, and a pressing piece; One end of the air passage is an air inlet, and the other end communicates with the installation chamber. The wall of the installation chamber is provided with an air outlet, and the end of the installation chamber far away from the air inlet passage is formed with an opening; The end of the air channel away from the air inlet, the outer periphery of the valve core is provided with a limit groove; one end of the moving armature is pierced through the valve core and extends to the air intake channel, and the other end extends towards the opening of the installation cavity; the shrapnel is sleeved on the valve The core, the inner peripheral edge of the elastic piece is engaged in the limiting groove; the pressing member is arranged on the side of the elastic piece close to the opening of the installation cavity, and resists the outer peripheral edge of the elastic piece. The technical scheme of the utility model realizes the independent adjustment of the pre-pressure of the electromagnetic shrapnel, and ensures that the pre-pressure of each product and the force curve of the working range are consistent.

Description

Seat assembly, proportional solenoid valve and ventilator

technical field

The utility model relates to the technical field of proportional valves, in particular to a valve seat assembly, a proportional solenoid valve and a ventilator.

Background technique

The ventilator needs to control the gas flow output during use, and the proportional solenoid valve is installed in the gas circuit to adjust the gas flow. Proportional solenoid valves generally use planar shrapnel to cooperate with the coil. The planar shrapnel is engaged with the lower periphery of the moving armature or the periphery of the valve core. The moving armature will be subjected to the cooperation of the static armature and the coil to generate magnetic upward suction, and the downward resistance of the planar shrapnel ( Prepressure), through the given coil current to control the electromagnetic force of the coil, and then pull the moving armature and the valve core to move up and down, so that the moving armature and the valve core move within the range of the air gap (the space generated between the upper part of the moving armature and the static armature) To different positions and cooperate with the planar shrapnel to achieve a balanced state, and then control the position of the valve core and the size of the valve opening, so as to realize the function of controlling the output gas flow.

In the existing proportional solenoid valve, the plane shrapnel is installed above the valve seat. The flat shrapnel needs to be installed in the valve body to be used and have pressure. Therefore, the pre-pressure cannot be effectively detected. The pre-compression deformation of the shrapnel can only be calculated by matching the size measurement. The error is large.

Utility model content

The main purpose of the utility model is to propose a valve seat assembly, which aims to realize that the pre-pressure of the plane shrapnel of the proportional solenoid valve can be adjusted independently, and improve the qualified rate of product production.

In order to achieve the above purpose, the valve seat assembly proposed by the utility model, the valve seat assembly includes:

A valve seat, the valve seat is formed with an air inlet passage and an installation cavity, one end of the air inlet passage is an air inlet, and the other end communicates with the installation chamber, and the wall of the installation chamber is provided with an air outlet, so An opening is formed at one end of the installation cavity away from the air intake passage;

A spool, the spool is arranged in the installation cavity, and blocks the end of the air inlet channel away from the air inlet, and the outer periphery of the spool is provided with a limiting groove;

A moving armature, one end of the moving armature is pierced through the valve core and extends to the air intake channel, and the other end extends towards the opening of the installation cavity;

a shrapnel, the shrapnel is sleeved on the valve core, and the inner periphery of the shrapnel is engaged in the limiting groove; and

A resisting member, the resisting member is arranged on a side of the elastic piece close to the opening of the installation cavity, and bears against the outer peripheral edge of the elastic piece.

Optionally, the resisting member is sleeved on the valve core, and a middle portion of a side surface of the resisting member facing the elastic piece is recessed in a direction away from the elastic piece.

Optionally, the valve seat assembly further includes a diaphragm, and the moving armature includes a connected main body and an insertion portion, the insertion portion is passed through the valve core, and the peripheral edge of one end of the main body abuts against the The valve core, the other end of which extends toward the opening of the installation cavity, the diaphragm is engaged with the connection between the main body and the valve core, and covers the opening of the installation cavity.

Optionally, the valve seat assembly further includes a seal, which is sleeved on an end of the valve core close to the intake passage, and exposes an end of the insertion part.

The utility model also proposes a proportional solenoid valve, which includes a valve seat assembly and a valve body assembly. The valve body assembly is formed with a first working chamber that covers the movable armature so as to drive the movable armature on the first Reciprocating movement in the extending direction of the working chamber;

The proportional solenoid valve has the function of driving the moving armature to drive the spool away from the air inlet channel so that the air inlet is connected to the air outlet, and disconnecting the moving armature so that the The valve core blocks the closed state of the intake passage.

Optionally, the valve seat assembly includes a diaphragm, the diaphragm covers the opening of the installation cavity, and the part of the valve body assembly that covers the valve seat encloses an accommodating cavity, the The moving armature is provided with an air storage channel, one end of the air storage channel communicates with the air intake channel, and the other end communicates with the accommodating cavity.

Optionally, the valve body assembly includes a casing, a coil and a static armature, the casing is connected to one end of the valve seat and covers the opening of the installation cavity, the coil and the static armature are arranged on the In the casing, the middle part of the surface of one side of the casing facing the diaphragm is recessed in a direction away from the diaphragm to form the accommodating cavity.

Optionally, the shell forms a second working chamber with an open end, the coil ring is arranged on the cavity wall of the second working chamber and extends along the length direction of the shell, the coil forms a magnetic space, the The static armature is installed in the magnetic space, and the moving armature is inserted in the magnetic space, and is spaced apart from the static armature to form an air gap.

Optionally, the valve body assembly further includes a magnetic conducting member, the magnetic conducting member is arranged on a wall of the working chamber close to its opening, and abuts against the coil.

The utility model also proposes a ventilator, which includes the above-mentioned proportional solenoid valve and an air circuit block, and the proportional electromagnetic valve is installed on the air circuit block.

The technical scheme of the utility model installs the shrapnel in the installation cavity of the valve seat, and engages it in the limiting groove of the valve core, and uses the pressing member to compress the outer peripheral edge, so that the valve seat assembly does not need to be installed on other parts The shrapnel pressure can be tested separately, that is, the workload of the assembly parts is reduced, and the pre-pressure change curve of the shrapnel can be tested by pulling up the armature and the valve core, so as to realize the separate adjustment of the pre-pressure of the electromagnetic shrapnel, ensuring that each Product preload and working range force curves are consistent.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the present utility model, and those skilled in the art can also obtain other drawings according to the structures shown in these drawings without creative work.

Fig. 1 is the structural representation of an embodiment of the utility model valve seat assembly;

Fig. 2 is a structural schematic diagram of another perspective of the valve seat assembly shown in Fig. 1;

Fig. 3 is an exploded view of the valve seat assembly shown in Fig. 1;

Fig. 4 is a schematic structural view of an embodiment of the proportional solenoid valve of the present invention;

Fig. 5 is an exploded view of the valve body assembly and the valve seat assembly in the proportional solenoid valve shown in Fig. 4;

Fig. 6 is a sectional view of the proportional solenoid valve shown in Fig. 4;

Fig. 7 is a sectional view of the proportional solenoid valve shown in Fig. 4 .

Explanation of reference numbers:

The realization of the purpose of the utility model, functional characteristics and advantages will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

It should be noted that if there is a directional indication (such as up, down, left, right, front, back...) in the embodiment of the present utility model, the directional indication is only used to explain the position in a certain posture (as shown in the accompanying drawing). If the relative positional relationship, movement conditions, etc. between the components shown in the figure below are changed, if the specific posture changes, the directional indication will also change accordingly.

In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, the descriptions of "first", "second", etc. Implying their relative importance or implying the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In addition, the technical solutions of the various embodiments can be combined with each other, but it must be based on the realization of those skilled in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist , also not within the scope of protection required by the utility model.

The utility model proposes a valve seat assembly 1 .

In the embodiment of the present utility model, as shown in Fig. 1 to Fig. 3, Fig. 6 and Fig. 7, the valve seat assembly 1 includes a valve seat 11, a valve core 12, a movable armature 13, a shrapnel 14 and a pressing member 15; Seat 11 is formed with air inlet passage 111 and installation chamber 112, and one end of air inlet passage 111 is air inlet 113, and the other end communicates with installation chamber 112, and the cavity wall of installation chamber 112 is provided with air outlet 114, and installation chamber 112 is far away from inlet. One end of the air passage 111 is formed with an opening; the valve core 12 is located in the installation cavity 112, and blocks the end of the air intake passage 111 away from the air inlet 113, and the outer periphery of the valve core 12 is provided with a limiting groove 121; the movable armature 13 One end is pierced through the valve core 12 and extends to the air intake channel 111, and the other end extends toward the opening of the installation cavity 112; the shrapnel 14 is sleeved on the valve core 12, and the inner peripheral edge of the shrapnel 14 is engaged in the limiting groove 121; The pressing piece 15 is disposed on a side of the elastic piece 14 close to the opening of the installation cavity 112 , and abuts against the outer periphery of the elastic piece 14 .

The valve seat 11 is open at both ends, one end is an opening, the other end is an air inlet 113 , the accommodation chamber 22 is between the opening and the air inlet 113 , and the air inlet passage 111 is between the air inlet 113 and the accommodation chamber 22 . The air outlet 114 is located between the air inlet 113 and the opening, and the air outlet 114 communicates with the accommodating chamber 22. It can be understood that the gas flows in through the air inlet 113, and can enter the accommodating chamber 22 after passing through the air inlet passage 111, and then from The receiving chamber 22 flows out of the air outlet 114 . The air intake channel 111 extends along the direction from the air intake port 113 to the housing chamber 22, and can be connected to the air intake channel 111 through an air intake pipe, so as to flow gas from the air intake port 113 into the housing chamber 22, so that the gas enters the valve seat 11, The operation of closing or opening the intake air to the valve seat 11 can be realized only by blocking or opening the intake passage 111 .

Both the spool 12 and the moving armature 13 are arranged in the housing cavity 22, the spool 12 is arranged at the junction of the intake passage 111 and the accommodation chamber 22, the cross-sectional shape of the valve core 12 is the same as that of the intake passage 111, The cross-sectional area of the spool 12 is greater than or equal to the cross-sectional area of the air intake passage 111, and one end of the spool 12 can be close to or far away from the side of the air intake passage 111 away from the air inlet 113, so that the spool 12 can be close to the seal. Block the intake passage 111 and open the communication relationship between the intake passage 111 and the accommodating cavity 22, and then realize the switch control of the intake air of the valve seat 11, or change the intake air volume through the distance between one end of the valve core 12 and the intake passage 111 . In this embodiment, the valve core 12 is a cylindrical body, and the movable armature 13 penetrates through the valve core 12 and extends to the air intake passage 111. The movable armature 13 and the valve core 12 are tightly connected, that is, the movable armature 13 and the valve core 12 It can move synchronously, and the movement of the valve core 12 can be controlled by controlling the movement of the brake armature 13. Therefore, by controlling the reciprocating movement of the brake armature 13 along the direction of the intake passage 111, it can be realized to drive the valve core 12 to move and then block or open the intake passage 111, and then Realize the on-off control of the intake air of the valve seat 11.

Further, the elastic piece 14 is a planar elastic piece 14, that is, the center of the elastic piece 14 has an opening and the entire elastic piece 14 has the ability to deform, and the elastic piece 14 is sleeved on the valve core 12 through the opening, that is, the inner periphery of the elastic piece 14 abuts against the valve core 12 the outer periphery. In this embodiment, the outer peripheral ring of the valve core 12 is provided with a limiting groove 121, and the inner peripheral edge of the elastic piece 14 is engaged in the limiting groove 121, that is, the groove wall of the limiting groove 121 can have an upward direction relative to the inner peripheral edge of the elastic piece 14. Or the downward limiting force can limit the movement of the elastic piece 14 up and down, and then the elastic piece 14 can also have the function of elastically limiting the valve core 12 .

Further, the valve seat assembly 1 also includes a pressing member 15, which also has an opening in the center, and the pressing member 15 is sleeved on the valve core 12 through the opening, and the outer peripheral edge of the pressing member 15 is abutted and accommodated. The cavity wall of the cavity 22 , and thus the pressing member 15 is firmly connected with the valve seat 11 . The side surface of the pressing piece 15 facing the elastic piece 14 presses against the outer peripheral edge of the elastic piece 14, so that the outer peripheral edge of the elastic piece 14 is limited to the same height as the pressing piece 15, and the inner peripheral edge of the elastic piece 14 can move upward with the valve core 12 . When the spool 12 is pulled upwards, the intake passage 111 communicates with the housing chamber 22, and the shrapnel 14 moves upwards with the spool 12. Since the inner peripheral edge of the shrapnel 14 is engaged in the limiting groove 121, the shrapnel 14 is relatively large for the spool. 12 has a downward elastic deformation force. When the upward pulling force of the spool 12 disappears, the shrapnel 14 restores to drive the spool 12 to recover. The spool 12 blocks the intake passage 111, and the intake passage 111 is not connected to the accommodating chamber 22. Then, the control of the valve core 12 can be realized through the shrapnel 14 , and a downward pressure is applied to the valve core 12 .

Further, it can be seen from the above that by adjusting the degree of pressing down on the outer periphery of the elastic piece 14 by the pressing member 15, and then adjusting the degree of pressing down on the inner periphery of the elastic piece 14, the greater the degree of pressing down of the elastic piece 14, the greater the deformation force of the elastic piece 14 , that is, by adjusting the downward pressure of the pressing member 15 on the elastic piece 14, the positional relationship between the elastic piece 14 and the valve core 12 can be adjusted, and then the downward elastic force of the elastic piece 14 on the valve core 12 can be adjusted, which is the pre-pressure of the elastic piece 14 . When the pressure of the pressing member 15 is greater, the pre-pressure of the shrapnel 14 on the spool 12 is greater, and the force corresponding to the need for the spool 12 to open the intake passage 111 is also greater. Test to obtain the pre-pressure value of the shrapnel 14. By continuously adjusting the pressing distance of the pressing member 15, the same pre-pressure of the shrapnel 14 of multiple different valve seat assemblies 1 can be realized, and then the specifications of different products can be the same, and the valve can be realized. The preload of the shrapnel 14 of the seat assembly 1 independently adjusts the effect.

The technical scheme of the utility model installs the shrapnel 14 in the installation cavity 112 of the valve seat 11, and engages in the limiting groove 121 of the valve core 12, and uses the pressing member 15 to compress its outer peripheral edge, so that the valve seat Component 1 can test the pressure of shrapnel 14 without being installed on other components, which reduces the workload of assembling parts and matching, and can use the pull-up armature 13 and valve core 12 to test the pre-pressure change curve of shrapnel 14, and then realize The individual adjustment of the preload of the electromagnetic shrapnel 14 ensures that the preload of each product and the force curve of the working range are consistent.

In one embodiment of the present invention, as shown in Fig. 3, Fig. 6 and Fig. 7, the pressing member 15 is sleeved on the valve core 12, and the middle part of the side surface of the pressing member 15 facing away from the shrapnel 14 faces away from the shrapnel 14. The direction is sunken.

The middle part of the side surface of the pressing block facing the shrapnel 14 is recessed toward the direction away from the shrapnel 14, so that the space for the shrapnel 14 to move synchronously when the valve core 12 moves upward is set in this way, because the outer peripheral edge of the shrapnel 14 is fixed by the pressing piece 15 , and then the inner peripheral edge of the shrapnel 14 moves upward with the valve core 12, and the outer peripheral edge maintains its original position. The height of the inner peripheral edge is gradually greater than the outer peripheral edge as it moves continuously. The deformation positions of 14 are matched, and the part of the shrapnel 14 other than the outer periphery is not in contact with the pressing piece 15 during the working process, so that the pressing piece 15 and the shrapnel 14 do not affect each other, and the pressing effect of the pressing piece 15 is maintained. The elastic piece 14 does not affect the pressing member 15 during the working process, and also ensures the elastic deformation capability of the elastic piece 14 .

In an embodiment of the present utility model, as shown in Fig. 1 to Fig. 3, Fig. 6 and Fig. 7, the valve seat assembly 1 further includes a diaphragm 16, and the moving armature 13 includes a main body part 131 and an insertion part 132 connected to each other. The part 132 is pierced through the valve core 12, one end of the main body part 131 abuts against the valve core 12, and the other end extends toward the opening direction of the installation cavity 112, and the diaphragm 16 is engaged with the joint between the main body part 131 and the valve core 12, and covered fit into the opening of the installation cavity 112.

The moving armature 13 includes a main body part 131 and an insertion part 132 which are connected. In this embodiment, the cross-sectional area of the main body part 131 is greater than that of the insertion part 132, and the cross-sectional area of the insertion part 132 is aligned with the center of the valve core 12. The openings have the same area, so when the movable armature 13 penetrates the valve core 12, the insertion part 132 is inserted into the central opening of the valve core 12, and the peripheral edge of one end of the main body part 131 abuts against the valve core 12 away from the intake channel 111. one side surface. Such setting can prevent the relative lateral movement of the movable armature 13 and the valve core 12, maintain the vertical position of the valve core 12 and the movable armature 13, keep the vertical movement of the movable armature 13 and the valve core 12 can successfully block the intake passage 111 .

Further, the diaphragm 16 is engaged with the junction of the main body 131 and the valve core 12, and covers the opening of the installation cavity 112, the setting of the diaphragm 16 can cover the opening of the installation cavity 112, and is used for the valve seat assembly 1 The sealing of the installation cavity 112 after being combined with the valve body prevents the gas in the installation cavity 112 from leaking out, and maintains the airtightness and sealing of the installation cavity 112.

In one embodiment of the present invention, as shown in Figure 6 and Figure 7, the valve seat assembly 1 also includes a seal 17, which is sleeved on the end of the valve core 12 close to the intake passage 111, and exposes the insertion part 132 the end of.

The sealing member 17 can be a sealing ring, a sealing gasket, etc. In this embodiment, the sealing member 17 is a sealing ring. The seal 17 is arranged on the end of the valve core 12 close to the intake passage 111. When the valve core 12 is blocked in the intake passage 111, the seal 17 can prevent the gas entering the intake passage 111 from the intake port 113 from passing along the valve core 12. The gap between the intake passage 111 and the intake passage 111 flows to the accommodation chamber 22, keeping the airtightness and sealing in the accommodation chamber 22 under the state where the valve core 12 blocks the intake passage 111, ensuring that the valve core 12 is for the intake passage 111. The blocking effect of the gas channel 111.

The utility model also proposes a proportional solenoid valve 100, as shown in Fig. 4 to Fig. 7, the proportional solenoid valve 100 includes a valve seat assembly 1 and a valve body assembly 2, the valve body assembly 2 forms a first cover movable armature 13 A working chamber 21, to drive the moving armature 13 to reciprocate in the extension direction of the first working chamber 21; the proportional solenoid valve 100 has a driving armature 13, and then drives the valve core 12 away from the air inlet passage 111 to communicate with the air inlet 113 The open state of the air outlet 114 and the closed state of disconnecting the armature 13 to make the valve core 12 block the intake passage 111 . The specific structure of the valve seat assembly 1 refers to the above-mentioned embodiments, because the proportional solenoid valve 100 adopts all the technical solutions of all the above-mentioned embodiments, so it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, and will not be described here. Let me repeat them one by one.

The valve body assembly 2 covers the end with an opening on the valve seat 11. The position where the valve body assembly 2 covers the valve seat 11 is the first working chamber 21. The valve body assembly 2 is connected with the moving armature 13, and then drives the moving armature 13. Do reciprocating motion in the extension direction of the first working chamber 21, the movable armature 13 moves to drive the valve core 12 to move, so that the valve core 12 can block or open the intake passage 111, and the movable armature 13 can reciprocate along the direction of the intake passage 111 The movement can drive the valve core 12 to move to block or open the intake passage 111 , and then realize the on-off control of the intake air of the valve seat 11 .

Furthermore, the opening of the valve core 12 is stably hovered at a certain displacement by the electromagnetic force, the force of the planar shrapnel 14 and the air pressure. These three forces are important factors for realizing control accuracy. Since the air pressure is mainly related to the inlet pressure and the force-bearing area, it can be simplified to a fixed value when the valve body structure is constant, and the matching relationship between the electromagnetic force curve and the plane shrapnel 14 curve is mainly considered. Since the electromagnetic force of the proportional valve electromagnet for ventilator is related to the armature air gap 26 and the input current, the force curve is a nonlinear curve. In order to match the electromagnetic force curve, the displacement curve of the planar shrapnel 14 is also a nonlinear curve. After the valve seat assembly 1 and the valve body assembly 2 are installed, the coil 24 can be energized. Since the pre-pressure change curve of the shrapnel 14 has been obtained, the corresponding electromagnetic force can be obtained by controlling the size of the air gap 26, and then by adjusting The degree of combination of the valve body assembly 2 and the valve seat assembly 1 can further adjust the air gap 26 to achieve the effect of adjusting the air gap 26 alone.

In one embodiment of the present invention, as shown in Fig. 4 to Fig. 7, the valve seat assembly 1 includes a diaphragm 16, the diaphragm 16 covers the opening of the installation cavity 112, and covers the valve seat 11 with the valve body assembly 2 An accommodating chamber 22 is formed around the part of the body, and the moving armature 13 is provided with an air storage channel 133 .

The part where the diaphragm 16 and the valve body assembly 2 cover the valve seat 11 forms an accommodation cavity 22. 16 forms a force opposite to the intake pressure, thereby offsetting part of the pre-compression force of the planar shrapnel 14. Since the moving armature 13 and the valve core 12 are subjected to the pre-pressure of the shrapnel 14, the reaction force of the diaphragm 16 is increased and the pressure is reduced. The initial driving force of the static armature 25, that is, the current that the static armature 25 attracts the moving armature 13 to start, makes the electromagnet open the spool 12 at a low power of 2.5W, thereby reducing the energy consumption of the proportional solenoid valve 100.

In one embodiment of the present invention, as shown in Figures 4 to 7, the valve body assembly 2 includes a housing 23, a coil 24 and a static armature 25, the housing 23 is connected to one end of the valve seat 11, and covers the installation cavity 112 The opening, the coil 24 and the static armature 25 are arranged in the housing 23 , and the middle of the side surface of the housing 23 facing the diaphragm 16 is recessed toward the direction away from the diaphragm 16 to form the accommodating chamber 22 .

The shell 23 covers the opening of the installation cavity 112, the coil 24 and the static armature 25 are arranged in the shell 23, and the iron core is set in the coil 24 through the energized coil 24, so that the iron core has a magnetic field, and the inside of the shell 23 also realizes a magnetic field. There is a magnetic field. The middle part of the side surface of the housing 23 facing the diaphragm 16 is recessed toward the direction away from the diaphragm 16, on the one hand, a housing cavity 22 is formed, and a force opposite to the intake pressure is formed on the diaphragm 16, thereby offsetting part of the planar spring 14 pre-compression force, which reduces the initial driving force of the static armature 25; on the other hand, the space for the diaphragm 16 to move synchronously when the valve core 12 moves upwards is reserved, and the middle part of the surface of the shell 23 faces away from the shrapnel 14. The deformation position of the elastic sheet 16 is matched, and the part of the diaphragm 16 except the outer peripheral edge is not in contact with the pressing member 15 during the working process, so that the casing 23 and the elastic sheet 14 do not affect each other, and the diaphragm 16 does not affect the casing 23 during the working process. , and also ensures the elastic deformation capability of the diaphragm 16 .

In one embodiment of the present utility model, as shown in FIGS. Extending in the direction, the coil 24 forms a magnetic space, the static armature 25 is installed in the magnetic space, the movable armature 13 is inserted in the magnetic space, and is spaced apart from the static armature 25 to form an air gap 26 .

The casing 23 forms a second working chamber 231, the wall of the second working chamber 231 is provided with a coil 24, and the coil 24 is powered with a magnetic field to form a magnetic space, and the static armature 25 is arranged in the magnetic space. The valve body assembly 2 is combined with the valve seat assembly 1, and the coil 24 is energized, so that the valve body assembly 2 has a magnetic field, and the initial air gap 26 can be changed by changing the initial combination degree of the valve seat assembly 1 and the valve body assembly 2 The degree of opening and closing of the intake passage 111 and the accommodating cavity 22 is realized by changing the current of the coil 24 to change the magnitude of the magnetic field, and then changing the size of the air gap 26 and the opening degree of the valve core 12 .

In one embodiment of the present invention, as shown in FIGS. 4 to 7 , the valve body assembly 2 further includes a magnetic guide 27, which is arranged around the wall of the working chamber close to its opening, and abuts against the coil 24. .

The setting of the magnetic guide 27 can extend the size of the magnetic space in the second working chamber 231, so that the second working chamber 231 is evenly distributed with magnetism, and keeps the magnetic magnitudes of each position roughly the same, which improves the working efficiency of the proportional solenoid valve 100. efficiency and work effectiveness.

The utility model also proposes a ventilator, which includes a proportional solenoid valve 100 and an air circuit block, and the proportional electromagnetic valve 100 is installed on the air circuit block.

The above is only a preferred embodiment of the present utility model, and does not therefore limit the scope of the patent of the present utility model. Under the inventive concept of the present utility model, the equivalent structural transformation made by using the specification of the utility model and the contents of the accompanying drawings, or Direct/indirect application in other related technical fields is included in the patent protection scope of the present utility model.

Claims (10)

1. A seat assembly for a solenoid valve, the seat assembly comprising:

the valve seat is provided with an air inlet channel and an installation cavity, one end of the air inlet channel is an air inlet, the other end of the air inlet channel is communicated with the installation cavity, the wall of the installation cavity is provided with an air outlet, and one end of the installation cavity, which is far away from the air inlet channel, is provided with an opening;

the valve core is arranged in the mounting cavity and blocks one end of the air inlet channel far away from the air inlet, and a limiting groove is formed in the outer periphery of the valve core;

one end of the movable armature iron penetrates through the valve core and extends to the air inlet channel, and the other end of the movable armature iron extends towards the opening direction of the installation cavity;

the elastic sheet is sleeved on the valve core, and the inner periphery of the elastic sheet is clamped in the limiting groove; and

the pressing piece is arranged on one side, close to the opening of the installation cavity, of the elastic sheet and abuts against the outer periphery of the elastic sheet.

2. The seat assembly as claimed in claim 1, wherein the pressing member is disposed around the valve core, and the pressing member is recessed toward a direction away from the resilient plate toward a middle portion of a side surface of the resilient plate.

3. The valve seat assembly of claim 2, further comprising a diaphragm, wherein the movable armature includes a main body portion and an insertion portion connected to each other, the insertion portion is inserted into the valve core, a peripheral edge of one end of the main body portion abuts against the valve core, the other end of the main body portion extends toward the opening of the installation cavity, and the diaphragm is clamped at a joint of the main body portion and the valve core and covers the opening of the installation cavity.

4. The seat assembly of claim 3, further comprising a sealing member disposed around an end of the valve plug adjacent to the inlet passage and exposing an end of the insert portion.

5. A proportional solenoid valve comprising a valve seat assembly according to any one of claims 1 to 4 and a valve body assembly formed with a first working chamber covering the movable armature to drive the movable armature to reciprocate in an extending direction of the first working chamber;

the proportional solenoid valve is provided with an opening state for driving the movable armature so as to drive the valve core to be far away from the air inlet channel to enable the air inlet to be communicated with the air outlet, and a closing state for disconnecting the movable armature so as to enable the valve core to block the air inlet channel.

6. The proportional solenoid valve of claim 5, wherein the valve seat assembly comprises a diaphragm, the diaphragm covers the opening of the mounting cavity and encloses with the valve body assembly covering the valve seat to form an accommodating cavity, the movable armature is provided with a gas storage channel, one end of the gas storage channel is communicated with the gas inlet channel, and the other end of the gas storage channel is communicated with the accommodating cavity.

7. The proportional solenoid valve of claim 6, wherein the valve body assembly includes a housing, a coil, and a stationary armature, the housing being connected to one end of the valve seat and covering an opening of the mounting chamber, the coil and the stationary armature being disposed in the housing, a middle portion of one side surface of the housing facing the diaphragm being recessed toward a direction away from the diaphragm to form the accommodation chamber.

8. The proportional solenoid valve of claim 7, wherein said housing defines a second working chamber with an open end, said coil is disposed around a wall of said second working chamber and extends along a length direction of said housing, said coil defines a magnetic space, said static armature is mounted in said magnetic space, said dynamic armature is inserted into said magnetic space and spaced from said static armature to define an air gap.

9. The proportional solenoid valve of claim 8, wherein the valve body assembly further comprises a magnetic conductor disposed around the working chamber adjacent the open chamber wall and abutting the coil.

10. A ventilator comprising a proportional solenoid valve according to any one of claims 5 to 9 and an air circuit block to which the proportional solenoid valve is mounted.

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