Double-control electromagnetic valve and electric control valve with proportional valve

Abstract

The double-control electromagnetic valve comprises a frame with a lower opening, a base plate, a coil winding frame, a coil, a fixed iron core, a main iron core, a main spring, a main valve element seat piece, a main spring seat, a main valve element, an auxiliary spring, an auxiliary movable iron core, an auxiliary valve element seat piece and an auxiliary valve element. The main valve element is arranged in the main spring seat, the pipe body part penetrates through the upper pipe hole and the seat pipe hole to extend out, the annular seat plate is connected with the annular inserting groove in an inserting mode, and the main spring is arranged on the pipe body part in a sleeving mode and matched with the main spring seat in a supporting mode; the pipe body part is inserted and fixed with the insertion head part; the inverted cone frustum-shaped column base is inserted into the upper end of the main spring; the auxiliary valve core is arranged on the auxiliary fixed seat, and the body part is connected with the auxiliary movable iron core; the lower end of the auxiliary spring is matched with the annular spring seat plate, and the upper end extends into the sinking hole to be matched with the annular seat plate; the auxiliary movable iron core extends into the pipe body part, is attached to the main movable iron core and is in sliding fit with the pipe body part. The fixed iron core, the driving iron core and the auxiliary iron core are arranged up and down, the main valve element and the auxiliary valve element are controlled, and the size is kept unchanged.

Description

Technical Field

[0001] This utility model relates to an electromagnetic valve for gas appliances. Background Technology

[0002] The existing technology, Chinese patent 202020771169.8, describes a coil assembly and a solenoid valve. The coil assembly includes a stationary iron core, a moving iron core assembly, a coil winding, and a permanent magnet. A receiving cavity is formed inside the coil winding. Both the stationary iron core and the moving iron core assembly are disposed within the receiving cavity, with the stationary iron core positioned above the moving iron core assembly. The permanent magnet is disposed outside the bottom of the coil winding. The moving iron core assembly includes a moving iron core and a core head, the moving iron core being able to abut against the stationary iron core. The moving iron core has a communicating first cavity and a first channel. The core head includes a body and a rod, the body being at least partially housed in the first cavity. An elastic member is sleeved on the rod, the elastic member abutting between the stationary iron core and the body. Problems: It only has one moving iron core and one solenoid valve core, resulting in a limited function. Utility Model Content

[0003] The purpose of this invention is to provide a dual-control solenoid valve, which has two moving iron cores and can control two air paths.

[0004] This utility model is implemented as follows: a dual-control solenoid valve, characterized in that it includes a frame with a lower opening, a base plate, a coil winding frame, a coil, a fixed iron core, a driving iron core, a main spring, a main valve core seat, a main spring seat, a main valve core, a secondary spring, a secondary driving iron core, a secondary valve core seat, and a secondary valve core.

[0005] The base plate is provided with an inverted frustum-shaped column base, a cavity and a guide hole;

[0006] The coil winding frame includes a hollow winding tube with openings at the top and bottom, an upper annular baffle and a lower annular baffle, and a guide tube made of non-magnetic material is provided inside the winding tube and extends outward;

[0007] The lower end of the active iron core is equipped with a connector.

[0008] The main valve core seat includes a tube body and an annular seat plate. The main valve core includes an upper tube hole, a lower countersunk hole, and an annular insertion groove located at the top of the lower countersunk hole.

[0009] The main spring seat is hollow with an opening at the bottom and is located in the seat tube hole;

[0010] The auxiliary valve core seat includes a body, an annular spring seat plate, and an auxiliary fixed seat.

[0011] The lower end of the guide tube is inserted into the cavity. The fixed iron core is located in the upper end of the guide tube and fixed to the top horizontal plate of the frame. The main valve core is located in the main spring seat. The tube body extends through the upper tube hole and the seat tube hole. The annular seat plate and the annular insertion groove are inserted. The main spring is sleeved on the upper and lower ends of the tube body and is supported and cooperated with the main spring seat. The tube body is inserted and fixed to the insertion part. The inverted truncated cone-shaped column seat is inserted into the upper end of the main spring. The auxiliary valve core is located on the auxiliary fixed seat. The body is connected to the auxiliary moving iron core. The lower end of the auxiliary spring cooperates with the annular spring seat plate, and the upper end extends into the recessed hole and cooperates with the annular seat plate.

[0012] The dual-control solenoid valve is characterized in that the auxiliary driving iron core includes a head hole and a connection hole.

[0013] The body of the auxiliary valve core seat is provided with a connecting rod, and the end of the connecting rod is provided with a stop head;

[0014] The connecting rod is located inside the connecting hole, and the stop head is located inside the head hole and is stopped by the bottom plate of the head hole.

[0015] The dual-control solenoid valve is characterized in that: the top of the main spring seat is provided with an upper-opening cylindrical cavity, and the lower end of the main spring is embedded in the cylindrical cavity.

[0016] The special feature of the dual-control solenoid valve is that the main spring and the auxiliary spring are tower-shaped springs.

[0017] The special feature of the aforementioned dual-control solenoid valve is that the main valve core seat is made of a non-magnetic material.

[0018] An electrically controlled valve with a proportional valve is characterized by comprising: a valve body, an electromagnetic proportional valve assembly, a dual-control solenoid valve as described above, a switch seat, a switch valve core, a valve stem, a switch spring, a support plate, a diaphragm, a bottom air chamber cover, a front cover plate, and a front air guide cover.

[0019] The valve body includes an inlet connector, a solenoid valve seat, an inlet chamber, an outlet chamber, an outlet port, a proportional valve seat, a drive solenoid valve core seat and a drive air passage, a first control air passage, a second control air passage, and a cover plate cavity.

[0020] The solenoid valve seat is equipped with a solenoid valve core seat, which is connected to the air inlet chamber. The drive valve core seat extends into the solenoid valve core seat. The control first air passage is connected to the drive valve core seat. The control second air passage is connected to the proportional valve core seat in the proportional valve seat. The proportional valve seat is connected to the air outlet chamber.

[0021] The switch base includes a seat cavity with a lower opening, a switch valve core seat on the top plate, and a rod seat frame with an air guide hole. The rod seat frame is provided with a valve rod channel.

[0022] The air outlet chamber includes a transverse section and a longitudinal section. The longitudinal section is connected to the air outlet interface and the proportional valve seat. The transverse section has a lower opening with a countersunk hole that extends to the lower end of the drive air passage.

[0023] The cover cavity extends to the ends that control the first airway and the second airway; the cover cavity is connected to the front opening of the transverse portion;

[0024] The front cover is provided with a first air vent and a second air vent;

[0025] The front air guide cover includes a first air guide groove, a main air guide groove, and a second air guide groove;

[0026] The diaphragm is equipped with an air passage sealing section and an air guide hole;

[0027] The base plate of the dual-control solenoid valve is fixed to the solenoid valve seat. The main valve core mates with the solenoid valve core seat, and the auxiliary valve core extends into the solenoid valve core seat and mates with the drive solenoid valve core seat. The electromagnetic proportional valve assembly is fixed to the proportional valve seat, and the proportional valve core mates with the proportional valve core seat. The front cover is embedded in the cover plate cavity. The first air guide hole and the second air guide hole control the first air passage and control the second air passage, respectively. The front air guide cover is attached to the front cover plate. The first air guide groove and the second air guide groove are connected to the first air guide hole and the second air guide hole, respectively. The switch seat is located in the air inlet chamber and the transverse part and extends into the air inlet chamber. The valve stem is fixed to the switch valve core. The valve stem extends through the seat cavity and the valve stem channel. One end of the switch spring mates with the rod seat frame, and the other end mates with the spring seat plate at the suspended end of the valve stem. The support plate is attached to the diaphragm. The edge of the diaphragm is embedded in the countersunk hole. The air passage sealing part extends into the lower end of the drive air end. The bottom air chamber cover covers the countersunk hole and fixes the diaphragm. The lower end of the valve stem abuts against the support plate.

[0028] The electric control valve with a proportional valve is characterized in that it further includes a nozzle, which is located inside the air outlet of the air guide hole of the air passage sealing part.

[0029] The electric control valve with a proportional valve is characterized in that: the switching valve core includes an open spherical curved surface and a cylindrical valve stem seat, and the spherical valve stem seat is provided with a circular hole and a spherical cavity;

[0030] The upper end of the valve stem is provided with a spherical part, and the valve stem is inserted into the circular hole and the spherical part fits into the spherical cavity;

[0031] The aforementioned electrically controlled valve with a proportional valve is characterized in that: the diaphragm includes a hollow, downward-opening annular protrusion and an annular seat plate.

[0032] The tray is fixed to the diaphragm inside the annular protrusion.

[0033] This utility model discloses a dual-control solenoid valve, which has a fixed iron core, an active iron core and an auxiliary moving iron core arranged at opposite ends, so as to control the main valve core and the auxiliary valve core while maintaining a constant volume. Attached Figure Description

[0034] Figure 1 This is a cross-sectional view of the present invention.

[0035] Figure 2 This is a cross-sectional view of the active iron core assembly of this utility model.

[0036] Figure 3 This is a cross-sectional view of the auxiliary driving iron core assembly of this utility model.

[0037] Figure 4 This is one of the exploded perspective views of this utility model.

[0038] Figure 5 yes Figure 4 A magnified view of a portion of the image.

[0039] Figure 6 This is the second exploded perspective view of this utility model.

[0040] Figure 7 This is a cross-sectional view of the second embodiment of the present invention.

[0041] Figure 8 yes Figure 7 A-A1 view.

[0042] Figure 9 yes Figure 7 A-A2 view.

[0043] Figure 10 This is a partial cross-sectional view of the second embodiment of the present invention.

[0044] Figure 11 This is one of the three-dimensional sectional views of the valve body of this utility model.

[0045] Figure 12 This is the second three-dimensional sectional view of the valve body of this utility model.

[0046] Figure 13 This is a perspective view of the valve body of this utility model.

[0047] Figure 14 This is one of the exploded perspective views of the second embodiment of this utility model.

[0048] Figure 15 This is the second exploded perspective view of the second embodiment of this utility model. Detailed Implementation

[0049] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0050] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0051] Example 1

[0052] like Figure 1 As shown, a dual-control solenoid valve 1 includes a frame 2 with a lower opening, a base plate 3, a coil winding frame 4, a coil, a fixed iron core 5, a driving iron core 61, a main spring 71, a main valve core seat 81, a main spring seat 9, a main valve core 101, a secondary spring 72, a secondary driving iron core 62, a secondary valve core seat 82, and a secondary valve core 102.

[0053] The base plate 3 is provided with an inverted frustum-shaped column base 3A, a cavity 3B and a guide hole 3C;

[0054] The coil winding frame 4 includes a hollow winding tube with openings at the top and bottom, an upper annular baffle and a lower annular baffle. The structure of the coil winding frame 4 is known technology. A guide tube 41 made of non-magnetic material is provided inside the winding tube and extends out of the winding tube.

[0055] The lower end of the active iron core 61 is provided with a connector 611.

[0056] The main valve core seat 81 is made of a non-magnetic material and includes a tube body 811 and an annular seat plate 812. It can be made of plastic or copper.

[0057] The main valve core 101 includes an upper pipe hole 1011, a lower hole 1012, and an annular insertion groove 1013 located at the top of the lower hole 1012;

[0058] The main spring seat 9 has a hollow lower opening and is located in the seat tube hole 91;

[0059] The auxiliary valve core seat 82 includes a body 821, an annular spring seat plate 822, and an auxiliary fixing seat 823.

[0060] The lower end of the guide tube 41 is inserted into the cavity 3B. The fixed iron core 5 is located inside the upper end of the guide tube 41 and is fixed to the top horizontal plate 2A of the frame 2. The main valve core 101 is located inside the main spring seat 9. The tube body 811 extends out of the main spring seat 9 through the upper tube hole 1011 and the seat tube hole 91. The annular seat plate 812 and the annular insertion groove 1013 are inserted into it. The main spring 71 is sleeved on the upper and lower ends of the tube body 811 and is supported and cooperated with the main spring seat 9. The active iron core 61 is located inside the lower part of the guide tube 41 and is positioned between it and the fixed iron core 5. There is a gap; the tube body 811 is inserted and fixed to the connector 611, and the inverted truncated cone-shaped column seat 3A is inserted into the upper end of the main spring 71; the auxiliary valve core 102 is provided on the auxiliary fixed seat 823, and the body 821 is connected to the auxiliary moving iron core 62; the lower end of the auxiliary spring 72 cooperates with the annular spring seat plate 822, and the upper end extends into the recessed hole 1012 and cooperates with the annular seat plate 812 of the main valve core seat 81; the auxiliary moving iron core 62 extends into the tube body 811 and fits against the active iron core 61 and slides with the tube body 811;

[0061] The structure employs a design where, when the coil is energized, the active iron core 61 and the auxiliary iron core 62 move upward together; when the coil is de-energized, the active iron core 61 and the auxiliary iron core 62 automatically return under the action of the main spring and the auxiliary spring: this is known in the art as a self-closing solenoid valve.

[0062] As a further improvement of this utility model: the auxiliary driving iron core 62 includes a head hole 621 and a connecting hole 622;

[0063] The auxiliary valve core seat 82 has a connecting rod 824 on its body 821, and a stop head 825 at the end of the connecting rod 824; the auxiliary valve core seat 82 is made of plastic material.

[0064] The connecting rod 824 is located inside the connecting hole 622, and the stop head 825 is located inside the head hole 621 and is stopped by the bottom plate of the head hole 621. With this structure, the auxiliary valve core seat 82 and the auxiliary moving iron core 62 move relative to each other; under the action of the auxiliary spring 72, after the coil is de-energized, the auxiliary valve core 102 quickly resets, thereby improving the sealing performance of the auxiliary valve core 102.

[0065] As a further improvement of this utility model: the top of the main spring seat 9 is provided with a cylindrical cavity 92 with an upper opening, and the lower end of the main spring 71 is embedded in the cylindrical cavity 92.

[0066] The main spring 71 and the auxiliary spring 72 are tower-shaped springs.

[0067] Example 2

[0068] like Figure 7As shown, an electrically controlled valve with a proportional valve includes a valve body 11, an electromagnetic proportional valve assembly 12, a dual-control solenoid valve 1 as described above, a switch seat 13, a switch valve core 14, a valve stem 15, a switch spring 16, a support plate 17, a diaphragm 18, a bottom air chamber cover 19, a front cover plate 20, and a front air guide cover 21.

[0069] The valve body 11 includes an air inlet connector 110, a solenoid valve seat 111, an air inlet chamber 112, an air outlet chamber 113, an air outlet (unmarked), a proportional valve seat 114, a drive solenoid valve core seat 115, a drive air passage 116, a first control air passage 1171, a second control air passage 1172, and a cover plate cavity 118.

[0070] The solenoid valve seat 111 contains a solenoid valve core seat 1111, which is connected to the air inlet chamber 112. The drive valve core seat 115 extends into the solenoid valve core seat 1111. The control first air passage 1171 is connected to the drive valve core seat 115. The control second air passage 1172 is connected to the proportional valve core seat in the proportional valve seat 114. The proportional valve seat 114 is connected to the air outlet chamber 113. The control first air passage 1171 and the control second air passage 1172 are connected to the cover plate cavity 118.

[0071] The switch base 13 includes a seat cavity 131 with a lower opening, a switch valve core seat 132 provided on the top plate, and a rod seat frame 133 with an air guide hole. The rod seat frame 133 is provided with a valve rod channel.

[0072] The air outlet chamber 113 includes a transverse portion 1131 and a longitudinal portion 1132. The longitudinal portion is connected to the air outlet interface and the proportional valve seat 114. The transverse portion 1131 has a lower opening, and a countersunk hole is provided on the lower opening. The countersunk hole extends to the lower end of the drive air passage 116. The air outlet chamber 113 can also be described as a bottom chamber and a side chamber.

[0073] The cover cavity 118 extends to the ends of the control first air passage 1171 and the control second air passage 1172; the cover cavity 118 and the front opening of the air inlet cavity 112 are connected;

[0074] The front cover plate 20 is provided with a first air guide hole 201 and a second air guide hole 202;

[0075] The front air guide cover 21 includes a first air guide groove 211, a main air guide groove 212, and a second air guide groove 213, which are connected in sequence.

[0076] The diaphragm 18 is provided with an air passage sealing part 181 and an air guide hole;

[0077] The base plate 3 of the dual-control solenoid valve 1 is fixed to the solenoid valve seat 111. The main valve core 101 cooperates with the solenoid valve core seat 1111, and the auxiliary valve core 102 extends into the solenoid valve core seat 1111 and cooperates with the drive solenoid valve core seat 115. The electromagnetic proportional valve assembly 12 is fixed to the proportional valve seat 114, and the proportional valve core 121 cooperates with the proportional valve core seat 1141. The front cover plate 20 is embedded in the cover plate cavity 118. The first air guide hole 201 and the second air guide hole 202 respectively control the first air passage 1171 and control the second air passage 1172. The front air guide cover 21 is attached to the front cover plate 20. The first air guide groove 211 and the second air guide groove 213 are respectively connected to the first air guide hole 201. The valve stem 15 is connected to the second air guide hole 202; the switch seat 13 is located at the connection between the air intake chamber 112 and the transverse part 1131 and extends into the air intake chamber 112; the valve stem 15 is fixed to the switch valve core 14; the valve stem 15 extends through the seat cavity 131 and the valve stem channel; one end of the switch spring 16 cooperates with the rod seat frame 133 and the other end cooperates with the spring seat plate at the suspended end of the valve stem 15; the support plate 17 is attached to the diaphragm 18; the edge of the diaphragm 18 is embedded in the countersunk hole; the air passage sealing part 181 extends into the lower end of the drive air passage 116; the bottom air chamber cover 19 covers the countersunk hole and fixes the diaphragm 18; the bottom air chamber cover 19 and the diaphragm 18 constitute the drive chamber; the lower end of the valve stem abuts against the support plate 17.

[0078] As a further improvement of this utility model, it also includes a nozzle 22, which is disposed inside the air outlet end of the air guide hole of the air passage sealing part 181.

[0079] As a further improvement of this utility model: the switch valve core 14 includes an open spherical curved surface 141 and a cylindrical valve stem seat 142, and the spherical valve stem seat 142 is provided with a circular hole and a spherical cavity.

[0080] The upper end of the valve stem 15 is provided with a spherical part 151 and a neck 152. The diameter of the neck 152 is smaller than the diameter of the spherical part 151 and the valve stem 15. The neck 152 is inserted into the circular hole and the spherical part 151 is fitted into the spherical cavity.

[0081] As a further improvement of this utility model: the diaphragm 18 includes a hollow, downwardly opening annular protrusion 182 and an annular seat plate 183.

[0082] The support plate 17 is fixed to the diaphragm 18 inside the annular protrusion 182, and the annular seat plate 183 is embedded in the countersunk hole of the transverse part 1131.

[0083] When using this utility model, such as Figure 1 , Figure 7When the dual-control solenoid valve 1 is energized, the active and auxiliary iron cores move upwards, causing the main valve core 101 to leave the solenoid valve core seat 1111 and the auxiliary valve core 102 to leave the drive solenoid valve core seat 115. Firstly, the gas enters the outlet chamber 113 via the inlet connector 110, solenoid valve seat 111, solenoid valve core seat 1111, inlet chamber 112, and switch valve core seat 132. Secondly, the gas enters the drive chamber formed by the diaphragm 18 and bottom gas chamber cover 19 via the solenoid valve core seat 1111, drive solenoid valve core seat 115, and drive gas passage 116. The diaphragm 18 drives the valve stem 15 and switch valve core 14 to leave the switch valve core seat 132; the gas then enters the outlet chamber from the inlet chamber. Thirdly, the gas drives the gas passage 116, controls the first gas passage 1171, the first guide groove 211, the main guide groove 212, the second guide groove 213, and controls the second gas passage 1172 to enter the proportional valve seat 114.

[0084] The change in current of the gas proportional valve 12 adjusts the gap between the proportional valve core 121 and the proportional valve core seat 1141, thereby adjusting the gas pressure in the drive chamber and controlling the gap between the switch valve core 14 and the switch valve core seat 132 to control the gas quantity.

[0085] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A dual-control solenoid valve, characterized in that: Includes a frame with a lower opening, a base plate, a coil winding frame, a coil, a fixed iron core, a driving iron core, a main spring, a main valve core seat, a main spring seat, a main valve core, a secondary spring, a secondary driving iron core, a secondary valve core seat, and a secondary valve core. The base plate is provided with an inverted frustum-shaped column base, a cavity and a guide hole; The coil winding frame includes a hollow winding tube with openings at the top and bottom, an upper annular baffle and a lower annular baffle, and a guide tube made of non-magnetic material is provided inside the winding tube and extends outward; The lower end of the active iron core is equipped with a connector. The main valve core seat includes a tube body and an annular seat plate. The main valve core includes an upper tube hole, a lower countersunk hole, and an annular insertion groove located at the top of the lower countersunk hole. The main spring seat is hollow with an opening at the bottom and is located in the seat tube hole; The auxiliary valve core seat includes a body, an annular spring seat plate, and an auxiliary fixed seat. The lower end of the guide tube is inserted into the cavity. The fixed iron core is located in the upper end of the guide tube and fixed to the top horizontal plate of the frame. The main valve core is located in the main spring seat. The tube body extends through the upper tube hole and the seat tube hole. The annular seat plate and the annular insertion groove are inserted. The main spring is sleeved on the upper and lower ends of the tube body and supports the main spring seat. The tube body is inserted and fixed to the insertion joint. The inverted truncated cone-shaped column seat is inserted into the upper end of the main spring. The auxiliary valve core is located on the auxiliary fixed seat. The body is connected to the auxiliary moving iron core. The lower end of the auxiliary spring cooperates with the annular spring seat plate, and the upper end extends into the recessed hole and cooperates with the annular seat plate. The auxiliary moving iron core extends into the tube body and fits against the active iron core and slides with the tube body.

2. The dual-control solenoid valve according to claim 1, characterized in that: The auxiliary moving iron core includes a head hole and a connecting hole; The body of the auxiliary valve core seat is provided with a connecting rod, and the end of the connecting rod is provided with a stop head; The connecting rod is located inside the connecting hole, and the stop head is located inside the head hole and is stopped by the bottom plate of the head hole.

3. The dual-control solenoid valve according to claim 1, characterized in that: The main spring seat has an open cylindrical cavity at the top, and the lower end of the main spring is embedded in the cylindrical cavity.

4. A dual-control solenoid valve according to claim 1, characterized in that: The main spring and the auxiliary spring are tower-shaped springs.

5. A dual-control solenoid valve according to claim 1, characterized in that: The main valve core seat is made of a non-magnetic material.

6. An electrically controlled valve with a proportional valve, characterized in that: Includes a valve body, an electromagnetic proportional valve assembly, a dual-control solenoid valve as described in any one of claims 1-5, a switch seat, a switch valve core, a valve stem, a switch spring, a support plate, a diaphragm, a bottom air chamber cover, a front cover plate, and a front air guide cover. The valve body includes an inlet connector, a solenoid valve seat, an inlet chamber, an outlet chamber, an outlet port, a proportional valve seat, a drive solenoid valve core seat and a drive air passage, a first control air passage, a second control air passage, and a cover plate cavity. The solenoid valve seat is equipped with a solenoid valve core seat, which is connected to the air inlet chamber. The drive valve core seat extends into the solenoid valve core seat. The control first air passage is connected to the drive valve core seat. The control second air passage is connected to the proportional valve core seat in the proportional valve seat. The proportional valve seat is connected to the air outlet chamber. The switch base includes a seat cavity with a lower opening, a switch valve core seat on the top plate, and a rod seat frame with an air guide hole. The rod seat frame is provided with a valve rod channel. The air outlet chamber includes a transverse section and a longitudinal section. The longitudinal section is connected to the air outlet interface and the proportional valve seat. The transverse section has a lower opening with a countersunk hole that extends to the lower end of the drive air passage. The cover cavity extends to the ends that control the first air passage and the second air passage; the front opening of the cover cavity and the air inlet cavity are connected. The front cover is provided with a first air vent and a second air vent; The front air guide cover includes a first air guide groove, a main air guide groove, and a second air guide groove; The diaphragm is equipped with an air passage sealing section and an air guide hole; The base plate of the dual-control solenoid valve is fixed to the solenoid valve seat. The main valve core mates with the solenoid valve core seat, and the auxiliary valve core extends into the solenoid valve core seat and mates with the drive solenoid valve core seat. The electromagnetic proportional valve assembly is fixed to the proportional valve seat, and the proportional valve core mates with the proportional valve core seat. The front cover is embedded in the cover plate cavity. The first air guide hole and the second air guide hole control the first air passage and control the second air passage respectively. The front air guide cover is attached to the front cover plate. The first air guide groove and the second air guide groove are connected to the first air guide hole and the second air guide hole respectively. The switch seat is located at the connection between the air inlet chamber and the transverse part and extends into the air inlet chamber. The valve stem is fixed to the switch valve core. The valve stem extends through the seat cavity and the valve stem channel. One end of the switch spring mates with the rod seat frame, and the other end mates with the spring seat plate at the suspended end of the valve stem. The support plate is attached to the diaphragm. The edge of the diaphragm is embedded in the countersunk hole. The air passage sealing part extends into the lower end of the drive air passage. The bottom air chamber cover covers the countersunk hole and fixes the diaphragm. The lower end of the valve stem abuts against the support plate.

7. The electrically controlled valve with a proportional valve according to claim 6, characterized in that: It also includes a nozzle, which is located inside the air outlet of the air guide hole of the air passage seal.

8. An electrically controlled valve with a proportional valve according to claim 6, characterized in that: The switching valve core includes an open spherical curved surface and a cylindrical valve stem seat, the spherical valve stem seat having a circular hole and a spherical cavity; The upper end of the valve stem is provided with a spherical part and a neck, the neck is inserted into a circular hole and the spherical part is fitted into the spherical cavity.

9. An electrically controlled valve with a proportional valve according to claim 6, characterized in that: The diaphragm includes a hollow, bottom-opening annular protrusion and an annular seat plate. The tray is fixed to the diaphragm inside the annular protrusion.

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