Solenoid valve

Abstract

The utility model provides an electromagnetic valve which comprises a valve body, a sealing membrane and an electromagnetic valve element assembly, the valve body is provided with a valve seat, a sealing opening is formed in the middle of the valve seat, the electromagnetic valve further comprises an air bag, an air bag cavity is formed in the valve body, the air bag cavity and the sealing membrane are located on the two sides of the valve seat respectively, and the air bag is installed in the air bag cavity and corresponds to the sealing opening. The lower end of the electromagnetic valve element assembly is used for extruding the airbag; when the electromagnetic valve element assembly drives the sealing diaphragm to open the sealing opening, the air bag can expand and abut against the sealing diaphragm through a part of a channel of the sealing opening. When the electromagnetic valve element assembly drives the sealing diaphragm to close the sealing opening, the lower end of the electromagnetic valve element assembly can further extrude the air bag to be shrunk into the air bag cavity. The air bag expands to abut against the sealing membrane through a part of the channel of the sealing opening, so that the sealing membrane is far away from the valve seat, smooth opening of the sealing membrane is achieved, and the problem that opening fails due to the fact that the sealing membrane adheres to the valve seat is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to an electromagnetic valve. BACKGROUND

[0002] The existing water purifier is usually provided with an electromagnetic valve for controlling on-off, and a sealing diaphragm of the electromagnetic valve abuts on a valve seat in the valve body to seal, when the electromagnetic valve is not used for a long time, the sealing diaphragm will stick to the valve seat, when the electromagnetic valve is opened, the valve rod cannot drive the diaphragm to move upward, so that the valve body cannot be normally opened. SUMMARY

[0003] The utility model wants to solve the technical problem to overcome the defects of prior art, provide a kind of electromagnetic valve.

[0004] The utility model solves the above technical problem by the following technical scheme:

[0005] An electromagnetic valve, comprising a valve body, a sealing diaphragm and an electromagnetic valve core assembly, the valve body has a valve seat, the middle part of the valve seat has a sealing port, the electromagnetic valve further comprises an air bag, the valve body further has an air bag cavity, the air bag cavity and the sealing diaphragm are located on both sides of the valve seat respectively, the air bag is installed in the air bag cavity and is correspondingly arranged with the sealing port, and the lower end of the electromagnetic valve core assembly is used to extrude the air bag.

[0006] When the electromagnetic valve core assembly drives the sealing diaphragm to open the sealing port, the air bag can be inflated and push the sealing diaphragm through a part of the channel of the sealing port.

[0007] When the electromagnetic valve core assembly drives the sealing diaphragm to close the sealing port, the lower end of the electromagnetic valve core assembly can also extrude the air bag to shrink in the air bag cavity.

[0008] In the scheme, the electromagnetic valve is provided with a sealing diaphragm and an air bag on both sides of the valve seat, the sealing diaphragm is used to seal or open the sealing port on the valve seat under the drive of the electromagnetic valve core assembly, when the electromagnetic valve core assembly drives the sealing diaphragm to open the sealing port, the electromagnetic valve core assembly releases the extrusion on the air bag, the air bag is inflated and pushes the sealing diaphragm through a part of the channel of the sealing port, so that the sealing diaphragm is away from the valve seat, the sealing diaphragm is smoothly opened, and the problem that the sealing diaphragm sticks to the valve seat to cause opening failure is solved, when the electromagnetic valve core assembly drives the sealing diaphragm to close the sealing port, the lower end of the electromagnetic valve core assembly can also extrude the air bag, the air bag is compressed back to the air bag cavity, so that the electromagnetic valve is smoothly opened and closed, and the reliability of the electromagnetic valve is improved.

[0009] Preferably, the electromagnetic valve core assembly comprises a magnetic valve rod, an elastic element and a coil, the valve rod is slidably arranged in the valve body, the lower end of the valve rod is connected to the sealing diaphragm, the elastic element is arranged between the valve rod and the valve body, and the coil is annularly arranged on the valve rod and configured to drive the valve rod to slide along the axial direction of the valve rod when energized.

[0010] In the present scheme, the coil is energized to generate a magnetic force which interacts with the magnetic force of the valve rod to push the valve rod to slide, thereby opening or closing the electromagnetic valve.

[0011] When the elastic element is configured to position the valve rod at the position of closing the sealing port, the elastic element exerts a force to push the valve rod towards the valve seat, and the coil is energized to generate a force to push the valve rod away from the valve seat. When the elastic element is configured to position the valve rod at the position of opening the sealing port, the elastic element exerts a force to push the valve rod away from the valve seat, and the coil is energized to generate a force to push the valve rod towards the valve seat.

[0012] Preferably, the end of the valve rod has a pushing portion which is located below the sealing diaphragm and used to push the air bag.

[0013] In the present scheme, the air bag can be compressed back into the air bag cavity under the action of the pushing portion, so as to close the sealing port by the sealing diaphragm.

[0014] Preferably, the valve body further has a valve cavity, the valve seat is located at the bottom of the valve cavity, the sealing diaphragm is provided with a pressure relief hole, the valve cavity can communicate with the water inlet of the electromagnetic valve through the pressure relief hole when the sealing diaphragm closes the sealing port, and the pressure relief hole is arranged staggered with the sealing port.

[0015] In the present scheme, by arranging the pressure relief hole, the water in the water inlet can flow to the valve cavity through the pressure relief hole, so that the surface of the sealing diaphragm away from the valve seat can be subjected to the pressure of the water, and the sealing diaphragm is pressed against the valve seat, thereby improving the sealing effect of the sealing diaphragm. When the sealing diaphragm is opened, the water in the valve cavity can also flow out through the pressure relief hole, thereby facilitating the rapid balance of the pressure on both sides of the sealing diaphragm and smoothly opening the sealing port.

[0016] Preferably, the surface of the sealing diaphragm close to the valve seat has a protruding sealing portion which is used to embed and seal the sealing port and push and compress the air bag.

[0017] In the present scheme, the sealing portion is used not only to seal the sealing port but also to push and compress the air bag, so that the air bag is compressed back into the air bag cavity.

[0018] Preferably, the sealing portion comprises at least a part of elastic material.

[0019] In the scheme, the structure is adopted to improve the sealing effect and facilitate the extrusion of the air bag and improve the extrusion effect of the air bag.

[0020] Preferably, the valve body further has a water passing cavity arranged around the sealing port, the water passing cavity and the valve cavity are respectively arranged on two sides of the valve seat, a plurality of through holes are arranged on the valve seat and around the sealing port, one end of the water passing cavity is communicated with the water inlet, and the other end of the water passing cavity is communicated with the valve cavity through the through holes.

[0021] In the scheme, the water passing cavity and the valve cavity are arranged on two sides of the valve seat, a plurality of through holes are arranged on the valve seat and the water passing cavity and the valve cavity are communicated through the through holes. When the electromagnetic valve opens the sealing port, the water in the water inlet can quickly flow into the valve cavity through the plurality of through holes, then flow into the sealing port from the valve cavity, and finally flow out from the water outlet, thereby increasing the water passing flux in the valve body. When the electromagnetic valve closes the sealing port, the water in the water inlet can quickly flow into the valve cavity through the through holes and the pressure relief hole, so that the sealing diaphragm is far away from the surface of the valve seat and is subjected to the water pressure force of the water inlet, thereby facilitating the pressing of the sealing diaphragm on the valve seat and improving the sealing effect.

[0022] Preferably, the valve cavity is arranged on a passage between the water inlet and the water outlet of the electromagnetic valve, and the passage passes through the channel between the air bag and the valve body.

[0023] In the scheme, the passage and the air bag cavity are integrated, and the internal structure of the valve body is simplified.

[0024] Preferably, the air bag cavity further has a limiting part for limiting the air bag, so that a channel is reserved between the air bag and the valve body.

[0025] In the scheme, the air bag is expanded or contracted in the limited area by the limiting part, so that the air bag does not block the passage.

[0026] Preferably, the electromagnetic valve further comprises a control unit and a power supply, and the power supply is electrically connected to the coil through the control unit.

[0027] In the scheme, the opening and closing signals of the electromagnetic valve are from the control unit. When the coil is powered on, the coil outputs a magnetic force, the magnetic force acts on the magnetic valve rod, the electromagnetic valve is in an open state, the valve rod releases the extrusion of the air bag, the air bag is expanded and pushes the sealing diaphragm, at this time, the liquid flows into the valve body from the water inlet, then flows through the sealing port, and finally flows out from the water outlet. When the coil is powered off, the valve rod closes the sealing port under the action of the elastic element, and the valve rod extrudes the air bag, so that the air bag is contracted into the air bag cavity.

[0028] On the basis of conforming to the common sense of the art, the above-mentioned various preferred conditions can be combined arbitrarily, namely, various preferred embodiments of the utility model are obtained.

[0029] The positive progress effect of the utility model lies in that the electromagnetic valve is provided with a sealing diaphragm and an air bag on both sides of the valve seat, the sealing diaphragm is used for sealing or opening the sealing port on the valve seat under the drive of the electromagnetic valve core assembly, when the electromagnetic valve core assembly drives the sealing diaphragm to open the sealing port, the electromagnetic valve core assembly releases the extrusion on the air bag, the air bag expands through part of the channel of the sealing port to push the sealing diaphragm, so that the sealing diaphragm is away from the valve seat, the smooth opening of the sealing diaphragm is realized, and the problem that the opening fails due to the adhesion of the sealing diaphragm to the valve seat is solved, when the electromagnetic valve core assembly drives the sealing diaphragm to close the sealing port, the lower end of the electromagnetic valve core assembly can also extrude the air bag, the air bag is compressed back to the air bag cavity, so that the smooth opening and closing of the electromagnetic valve are realized, and the reliability of the electromagnetic valve is improved. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is a structure schematic view of the electromagnetic valve of a preferred embodiment of the utility model.

[0031] Figure 2 It is an internal structure schematic view of the electromagnetic valve of a preferred embodiment of the utility model.

[0032] Figure 3 It is an internal structure schematic view of the valve body of a preferred embodiment of the utility model.

[0033] Figure 4 It is a structure schematic view of the electromagnetic valve core assembly and the sealing diaphragm of a preferred embodiment of the utility model.

[0034] Figure 5 It is a structure schematic view of the sealing diaphragm of a preferred embodiment of the utility model.

[0035] Valve body 1

[0036] Valve seat 11

[0037] Sealing port 111

[0038] Through hole 112

[0039] Air bag cavity 12

[0040] Valve cavity 13

[0041] Water passing cavity 14

[0042] Water inlet 15

[0043] Water outlet 16

[0044] Channel 17

[0045] Sealing diaphragm 2

[0046] Pressure relief hole 21

[0047] Sealing portion 22

[0048] Solenoid spool assembly 3

[0049] Valve stem 31

[0050] Elastic element 32

[0051] Coil 33

[0052] Air bag 4

[0053] Liquid flow direction 100 DETAILED DESCRIPTION

[0054] The utility model discloses below a preferred embodiment, and in combination with the drawings more clearly and completely explain the utility model.

[0055] As Figures 1-5 The utility model discloses an electromagnetic valve, the electromagnetic valve includes valve body 1, sealing diaphragm 2 and solenoid spool assembly 3, valve body 1 has valve seat 11, and the middle part of valve seat 11 has sealing mouth 111, and the electromagnetic valve still includes air bag 4, and valve body 1 still has air bag cavity 12, and air bag cavity 12 and sealing diaphragm 2 are located at both sides of valve seat 11 respectively, and air bag 4 is installed in air bag cavity 12 and is set up with sealing mouth 111 corresponding, and the lower end of solenoid spool assembly 3 is connected to sealing diaphragm 2, and the lower end of solenoid spool assembly 3 is also used to extrude air bag 4.When solenoid spool assembly 3 drives sealing diaphragm 2 to open sealing mouth 111, air bag 4 can expand and push sealing diaphragm 2 through the part passage of sealing mouth 111;When solenoid spool assembly 3 drives sealing diaphragm 2 to close sealing mouth 111, the lower end of solenoid spool assembly 3 can also extrude air bag 4 and shrink in air bag cavity 12.

[0056] As Figures 2-5 In the embodiment, the electromagnetic valve sets sealing diaphragm 2 and air bag 4 at both sides of valve seat 11 respectively, and sealing diaphragm 2 is used to seal or open sealing mouth 111 on valve seat 11 under the drive of solenoid spool assembly 3, when solenoid spool assembly 3 drives sealing diaphragm 2 to open sealing mouth 111, solenoid spool assembly 3 removes the extrusion to air bag 4, and air bag 4 expands and pushes sealing diaphragm 2 through the part passage of sealing mouth 111, makes sealing diaphragm 2 away from valve seat 11, realizes the smooth opening of sealing diaphragm 2, solves the problem of opening failure due to the sticking of sealing diaphragm 2 on valve seat 11, when solenoid spool assembly 3 drives sealing diaphragm 2 to close sealing mouth 111, the lower end of solenoid spool assembly 3 can also extrude air bag 4, and air bag 4 is compressed back to air bag cavity 12, so reciprocating realizes the smooth opening and closing of electromagnetic valve, improves the reliability of electromagnetic valve.

[0057] In the embodiment, the sealing port 111 is located on the passage between the water inlet 15 and the water outlet 16, and opening the sealing port 111 can open the electromagnetic valve, and closing the sealing port 111 can close the electromagnetic valve.

[0058] As shown in Figure 2 , the electromagnetic valve core assembly 3 includes a magnetic valve rod 31, an elastic element 32 and a coil 33, the valve rod 31 is slidably arranged in the valve body 1, the lower end of the valve rod 31 is connected to the sealing diaphragm 2, the elastic element 32 is arranged between the valve rod 31 and the valve body 1, and the coil 33 is arranged around the valve rod 31. The coil 33 is configured to drive the valve rod 31 to slide in the axial direction of itself when energized. After the coil 33 is energized, a magnetic force is generated, which interacts with the magnetic force of the valve rod 31, thereby pushing the valve rod 31 to slide, realizing the opening or closing of the electromagnetic valve. In the embodiment, when the elastic element 32 is configured to make the valve rod 31 in the position of closing the sealing port 111, the elastic element 32 exerts a force on the valve rod 31 to make the valve rod 31 approach the valve seat 11, and then the coil 33 is energized to generate a force to make the valve rod 31 away from the valve seat 11.

[0059] In another embodiment, when the elastic element is configured to make the valve rod in the position of opening the sealing port, the elastic element exerts a force on the valve rod to make the valve rod away from the valve seat, and then the coil is energized to generate a force to make the valve rod approach the valve seat.

[0060] As shown in Figures 2-5 , the valve body 1 also has a valve cavity 13, the valve seat 11 is located at the bottom of the valve cavity 13, and the sealing diaphragm 2 is provided with a pressure relief hole 21. When the sealing diaphragm 2 closes the sealing port 111, the valve cavity 13 can communicate with the water inlet 15 of the electromagnetic valve through the pressure relief hole 21, and the pressure relief hole 21 is arranged staggered with the sealing port 111. By arranging the pressure relief hole 21, the water in the water inlet 15 can flow to the valve cavity 13 through the pressure relief hole 21, so that the surface of the sealing diaphragm 2 away from the valve seat 11 can be subjected to the pressure of the water, and the sealing diaphragm 2 is pressed on the valve seat 11, improving the sealing effect of the sealing diaphragm 2. When the sealing diaphragm 2 is opened, the water in the valve cavity 13 can also flow out through the pressure relief hole 21, which is convenient for quickly balancing the pressure on both sides of the sealing diaphragm 2 and smoothly opening the sealing port 111.

[0061] As shown in Figure 2 and Figure 4 , the surface of the sealing diaphragm 2 close to the valve seat 11 has a protruding sealing part 22, which is used for embedding and sealing the sealing port 111, and also for pushing the air bag 4. In addition to being used for sealing the sealing port 111, the sealing part 22 is also used for pushing and compressing the air bag 4, so that the air bag 4 is compressed back into the air bag cavity 12. Preferably, the sealing part 22 at least includes a part of elastic material, which not only improves the sealing effect, but also facilitates the extrusion of the air bag 4, thereby improving the extrusion effect of the air bag 4.

[0062] In an alternative embodiment, the end of the valve stem has a pushing portion below the sealing diaphragm for pushing the air bag. The air bag can be compressed back into the air bag cavity under the action of the pushing portion, so as to close the sealing port by the sealing diaphragm.

[0063] As shown in Figures 2-5 , the valve body 1 further has a water passing cavity 14 around the sealing port 111, which is located on both sides of the valve seat 11 respectively. The valve seat 11 is provided with a plurality of through holes 112 around the sealing port 111. One end of the water passing cavity 14 is in communication with the water inlet 15, and the other end of the water passing cavity 14 is in communication with the valve cavity 13 through the through holes 112. By arranging the water passing cavity 14 and the valve cavity 13 on both sides of the valve seat 11 respectively, a plurality of through holes 112 can be arranged on the valve seat 11, which communicates the water passing cavity 14 and the valve cavity 13. When the electromagnetic valve opens the sealing port 111, the water in the water inlet 15 can quickly flow into the valve cavity 13 through the plurality of through holes 112, and then flow into the sealing port 111 from the valve cavity 13, and finally flow out from the water outlet 16, thereby increasing the water passing flux in the valve body 1. When the electromagnetic valve closes the sealing port 111, the water in the water inlet 15 can quickly flow into the valve cavity 13 through the through holes 112 and the pressure relief hole 21, so that the sealing diaphragm 2 is away from the surface of the valve seat 11 and is subjected to the water pressure force of the water inlet 15, thereby facilitating the sealing diaphragm 2 to be pressed tightly against the valve seat 11 and improving the sealing effect. Figure 2 The sealing port 111 in the electromagnetic valve is in a closed state. Figure 2 The liquid flow direction 100 in the valve body 1 is shown by arrows in Figure 2 .

[0064] As shown in Figure 2 , the valve cavity 13 is located on the passage between the water inlet 15 and the water outlet 16 of the electromagnetic valve, and the passage passes through the channel 17 between the air bag 4 and the valve body 1. Integrating the passage with the air bag cavity 12 eliminates the need to separately arrange a channel in the valve body 1, thereby simplifying the internal structure of the valve body 1.

[0065] The air bag cavity 12 further has a limiting portion (not shown in the figure) for limiting the air bag 4, so that the channel 17 is reserved between the air bag 4 and the valve body 1. By arranging the limiting portion, the air bag 4 is expanded or contracted in a limited area, thereby avoiding the air bag 4 from blocking the passage.

[0066] In the embodiment, the electromagnetic valve further comprises a control unit and a power supply, the power supply is electrically connected to the coil 33 through the control unit. The opening and closing signals of the electromagnetic valve are both from the control unit. When the coil 33 is powered, the coil 33 will output a magnetic force, the magnetic force will act on the magnetic valve rod 31, so that the electromagnetic valve is in an open state, the valve rod 31 releases the extrusion on the air bag 4, the air bag 4 is in an inflation state and pushes the sealing diaphragm 2, at this time, the liquid will flow into the valve body 1 from the water inlet 15, then flow through the sealing port 111, and finally flow out from the water outlet 16. When the coil 33 is powered off, the magnetic force is no longer provided, the valve rod 31 closes the sealing port 111 under the action of the elastic element 32, at the same time, the lower end of the valve rod 31 extrudes the air bag 4, so that the air bag 4 is contracted to the air bag cavity 12.

[0067] In the description herein, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0068] Although the specific embodiments of the present application are described above, those skilled in the art should understand that this is only an example, the protection scope of the present application is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present application, but these changes and modifications all fall within the protection scope of the present application.

Claims

1. An electromagnetic valve comprising a valve body having a valve seat with a sealing port in the middle thereof, a sealing diaphragm, and an electromagnetic spool assembly, characterized by, The electromagnetic valve further comprises an air bag, the valve body further has an air bag cavity, the air bag cavity is located on both sides of the valve seat respectively with the sealing diaphragm, the air bag is installed in the air bag cavity and is arranged correspondingly with the sealing port, the lower end of the electromagnetic valve core assembly is used for extruding the air bag; When the electromagnetic valve core assembly drives the sealing diaphragm to open the sealing port, the air bag can be inflated and push the sealing diaphragm through a part of the channel of the sealing port; When the electromagnetic valve core assembly drives the sealing diaphragm to close the sealing port, the lower end of the electromagnetic valve core assembly can also extrude the air bag to shrink in the air bag cavity.

2. The electromagnetic valve according to claim 1, wherein The electromagnetic valve core assembly comprises a magnetic valve rod, an elastic element and a coil, the valve rod is slidably arranged in the valve body, the lower end of the valve rod is connected to the sealing diaphragm, the elastic element is arranged between the valve rod and the valve body, and the coil is annularly arranged on the valve rod, and the coil is configured to drive the valve rod to slide along the axial direction of the valve rod when energized.

3. The electromagnetic valve according to claim 2, wherein The end of the valve rod has a pushing part below the sealing diaphragm for pushing the air bag.

4. The electromagnetic valve according to claim 2, wherein The valve body further has a valve cavity, the valve seat is located at the bottom of the valve cavity, the sealing diaphragm is provided with a pressure relief hole, the valve cavity can be communicated with the water inlet of the electromagnetic valve through the pressure relief hole when the sealing diaphragm closes the sealing port, and the pressure relief hole is arranged staggered with the sealing port.

5. The electromagnetic valve according to claim 4, wherein The surface of the sealing diaphragm close to the valve seat has a protruding sealing part for embedding and sealing the sealing port, and the sealing part is also used for pushing the air bag.

6. The electromagnetic valve according to claim 5, wherein The sealing part comprises at least a part of elastic material.

7. The electromagnetic valve according to claim 4, wherein The valve body further has a water passing cavity arranged around the sealing port, the water passing cavity is located on both sides of the valve seat respectively with the valve cavity, the valve seat is provided with a plurality of through holes, the plurality of through holes are arranged around the sealing port, one end of the water passing cavity is communicated with the water inlet, and the other end of the water passing cavity is communicated with the valve cavity through the through holes.

8. The electromagnetic valve according to claim 4, wherein The valve cavity is located on the passage between the water inlet and the water outlet of the electromagnetic valve, and the passage passes through the channel between the air bag and the valve body.

9. The electromagnetic valve according to claim 8, wherein The air bag cavity further has a limiting part for limiting the air bag, so that a channel is reserved between the air bag and the valve body.

10. The electromagnetic valve according to claim 2, wherein The electromagnetic valve further comprises a control unit and a power supply, and the power supply is electrically connected to the coil through the control unit.

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