Double-control electromagnetic valve

Abstract

The double-control electromagnetic valve comprises a main frame and a coil assembly installed in the main frame, an axial through hole is formed in the coil assembly, openings corresponding to the two ends of the axial through hole respectively are formed in the two ends of the main frame, and an iron core assembly is arranged in the axial through hole. The iron core assembly comprises a static iron core, a first movable iron core and a second movable iron core, and a first elastic reset piece and a second elastic reset piece which are used for enabling the first movable iron core and the second movable iron core to reset in the direction away from the static iron core are arranged between the first movable iron core and the static iron core and between the second movable iron core and the static iron core respectively. A first annular permanent magnet and a second annular permanent magnet are arranged at the two ends of the main frame correspondingly, and the first movable iron core and the second movable iron core are configured to penetrate through the first annular permanent magnet and the second annular permanent magnet correspondingly. According to the utility model, the whole structure is simple and compact, the coil assembly only needs one control circuit, the IO port of the single-chip microcomputer is not occupied too much, and the realization of structure miniaturization and circuit miniaturization is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of solenoid valves, in particular to a double-control solenoid valve. Background Art

[0002] Existing solenoid valves usually use one solenoid valve coil to control one valve assembly. For the use environment where dual-circuit control of hot and cold water faucets is required, two solenoid valve coils are required to control two valve assemblies respectively, resulting in high costs. In addition, the control requires two separate electronic control circuits, and may even require more MCU IO ports and drive circuits, which is not conducive to circuit miniaturization. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a double-control solenoid valve, wherein one coil assembly can synchronously control the opening and closing of two groups of valve structures, which is conducive to miniaturization of the circuit.

[0004] In order to achieve the above object, the utility model is realized by the following technical solutions:

[0005] A double-control solenoid valve comprises a main frame and a coil assembly installed in the main frame, wherein an axial through hole is provided in the coil assembly, and openings corresponding to the two ends of the axial through hole are provided at both ends of the main frame, and an iron core assembly is provided in the axial through hole, wherein the iron core assembly comprises a static iron core and two first and second moving iron cores respectively arranged corresponding to the two ends of the static iron core, and first and second elastic reset members for automatically resetting the first and second moving iron cores in a direction away from the static iron core are respectively provided between the ends corresponding to the static iron core of the first and second moving iron cores, and first and second annular permanent magnets are respectively provided at both ends of the main frame, and the first and second moving iron cores are configured to pass through the first and second annular permanent magnets respectively.

[0006] Furthermore, the first annular permanent magnet, the static iron core and the second annular permanent magnet are coaxially arranged.

[0007] Furthermore, when a positive current flows through the coil assembly, the magnetic field generated by the coil assembly is in the same direction as the magnetic fields generated by the first annular permanent magnet and the second annular permanent magnet. Under the combined action of the magnetic field of the coil assembly and the magnetic field of the first annular permanent magnet, the attraction between the first moving iron core and the static iron core is greater than the elastic force of the first elastic reset member. The first moving iron core overcomes the elastic force of the first elastic reset member and moves toward the direction close to the static iron core until the first moving iron core moves to the valve opening position. Then, the coil assembly is powered off. Under the action of the magnetic field of the first annular permanent magnet, the first moving iron core attracts the static iron core and remains in the valve opening position to open the valve. Under the combined action of the magnetic field of the coil assembly and the magnetic field of the second annular permanent magnet, the attraction between the second moving iron core and the static iron core is greater than the elastic force of the second elastic reset member. The second moving iron core overcomes the elastic force of the second elastic reset member and moves toward the direction close to the static iron core until the second moving iron core The iron core moves to the valve opening position, and then the coil assembly is powered off. The second moving iron core is attracted to the static iron core under the action of the magnetic field of the second annular permanent magnet and maintained in the valve opening position to open the valve; and when the coil assembly passes a reverse current, the magnetic field generated by the coil assembly is opposite to the magnetic fields generated by the first annular permanent magnet and the second annular permanent magnet. Under the joint action of the magnetic field of the coil assembly and the magnetic field of the first annular permanent magnet, the attraction between the first moving iron core and the static iron core is smaller than the elastic force of the first elastic reset member. The first moving iron core automatically moves in a direction away from the static iron core under the action of the elastic force of the first elastic reset member to close the valve. Moreover, under the joint action of the magnetic field of the coil assembly and the magnetic field of the second annular permanent magnet, the attraction between the second moving iron core and the static iron core is smaller than the elastic force of the second elastic reset member. The second moving iron core automatically moves in a direction away from the static iron core under the action of the elastic force of the second elastic reset member to close the valve.

[0008] Furthermore, the valve opening position is a state position where the first moving iron core or the first moving iron core moves to a state where it contacts with the static iron core to form an attraction.

[0009] Furthermore, the first elastic return member and the second elastic return member are both compression springs, one end of the two compression springs respectively abuts against the corresponding inner ends of the first moving iron core and the second moving iron core, and the other ends of the two compression springs respectively abut against the corresponding end positions of the static iron core.

[0010] Furthermore, a first rubber sealing plug and a second rubber sealing plug for sealing the transmission channel are respectively provided at the outer ends of the first moving iron core and the second moving iron core.

[0011] Furthermore, it also includes two cylindrical plastic cores, the inner ends of the two cylindrical plastic cores are respectively inserted into the axial through hole of the coil assembly from two openings on the main frame and are sealed together with the two ends of the static iron core inside the axial through hole, the first moving iron core and the second moving iron core are configured to be respectively and adaptively embedded in the corresponding cylindrical plastic cores, and the first annular permanent magnet and the second annular permanent magnet are configured to be respectively sleeved on the two cylindrical plastic cores.

[0012] Furthermore, the first annular permanent magnet and the second annular permanent magnet are configured to be respectively sleeved on the two cylindrical plastic cores with interference fit, and the first annular permanent magnet and the second annular permanent magnet are respectively pressed against the upper and lower end surfaces of the main frame.

[0013] Furthermore, it also includes two sleeves, which are configured to be respectively nested between the outer walls of the two cylindrical plastic cores and the inner walls of the axial through hole with interference fit, and the outer ends of the sleeves extend to the opening surface of the main frame and interfere with the corresponding first annular permanent magnet or second annular permanent magnet, while the inner ends of the sleeves extend to a position corresponding to at least part of the inside and outside of the static iron core.

[0014] Furthermore, the main frame and the sleeve are made of ferromagnetic metal.

[0015] Furthermore, the main frame and the sleeve are an iron main frame and an iron sleeve structure.

[0016] The above technical solution has the following advantages or beneficial effects:

[0017] In the double-control solenoid valve described in the utility model, only one coil assembly is arranged in the double-control solenoid valve, and the coil assembly with positive and negative current cooperates with the first annular permanent magnet and the second annular permanent magnet and the first elastic reset member and the second elastic reset member to synchronously control the action of the two moving iron cores, thereby realizing the synchronous opening and closing control of the two valve structures, and the overall structure is simple and compact, and the coil assembly only needs one control circuit, and will not occupy too much IO port of the single-chip computer, which is conducive to realizing the miniaturization of structure and circuit. More importantly, the first annular permanent magnet and the second annular permanent magnet are assembled at the two ends of the main frame, and the assembly process is more convenient, and the magnetic fields of the first annular permanent magnet and the second annular permanent magnet act on the first moving iron core and the second moving iron core respectively, which is conducive to improving the stability and accuracy of the action switching of the first moving iron core and the second moving iron core. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of the utility model.

[0019] Figure 2 It is a structural sectional view of an embodiment of the utility model.

[0020] Figure 3It is a three-dimensional structure explosion diagram of an embodiment of the utility model.

[0021] Description of labels:

[0022] 1. Main frame, 2. Coil assembly, 3. Iron core assembly, 4. First elastic reset member, 5. Second elastic reset member, 6. First annular permanent magnet, 7. Second annular permanent magnet, 8. Cylindrical plastic core, 9. Sleeve, 11. Opening, 21. Axial through hole, 31. Stationary iron core, 32. First moving iron core, 33. Second moving iron core, 321. First rubber sealing plug, 322. Second rubber sealing plug. DETAILED DESCRIPTION

[0023] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0024] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0025] Please refer to the attached Figure 1 To Attachment Figure 3An embodiment of the utility model provides a double-control solenoid valve, including a main frame 1, a coil assembly 2 installed in the main frame 1, an axial through hole 21 is provided in the coil assembly 2, and openings 11 corresponding to the two ends of the axial through hole 21 are opened at both ends of the main frame 1, and an iron core assembly 3 is provided in the axial through hole 21, the iron core assembly 3 includes a static iron core 31 and two first moving iron cores 32 and second moving iron cores 33 respectively arranged corresponding to the two ends of the static iron core 31, and a first elastic reset member 4 and a second elastic reset member 5 for automatically resetting the first moving iron core 32 and the second moving iron core 33 in a direction away from the static iron core 31 are respectively provided between the ends of the first moving iron core 32 and the second moving iron core 33 corresponding to the static iron core 31, and a first annular permanent magnet 6 and a second annular permanent magnet 7 are respectively provided at both ends of the main frame 1, and the first moving iron core 32 and the second moving iron core 33 are configured to pass through the first annular permanent magnet 6 and the second annular permanent magnet 7 respectively. In this embodiment, only one coil assembly 2 is arranged in the double-control solenoid valve, and the first and second annular permanent magnets 6 and 7 and the first elastic reset member 4 and the second elastic reset member 5 are used to synchronously control the action of the first moving iron core 32 and the second moving iron core 33 by the coil assembly 2 that is energized in the positive and negative directions, thereby realizing the synchronous valve opening and closing control of the two valve structures, and the overall structure is simple and compact, and the coil assembly 2 only needs one control circuit, and will not occupy too much IO port of the single-chip microcomputer, which is conducive to realizing structural miniaturization and circuit miniaturization. More importantly, the first annular permanent magnet 6 and the second annular permanent magnet 7 are assembled at both ends of the main frame 1, and the assembly process is more convenient, and the magnetic fields of the first annular permanent magnet 6 and the second annular permanent magnet 7 act on the first moving iron core 32 and the second moving iron core 33 respectively, which is conducive to improving the stability and accuracy of the action switching of the first moving iron core 32 and the second moving iron core 33.

[0026] Please refer to the attached Figure 1 To Attachment Figure 3In one preferred embodiment, the first annular permanent magnet 6, the static iron core 31 and the second annular permanent magnet 7 are coaxially arranged. When a positive current flows through the coil assembly 2, the magnetic field generated by the coil assembly 2 is in the same direction as the magnetic fields generated by the first annular permanent magnet 6 and the second annular permanent magnet 7. Under the combined action of the magnetic field of the coil assembly 2 and the magnetic field of the first annular permanent magnet 6, the attraction between the first moving iron core 32 and the static iron core 31 is greater than the elastic force of the first elastic reset member 4. The first moving iron core 32 overcomes the elastic force of the first elastic reset member 4 and moves toward the direction close to the static iron core 31 until the first moving iron core 32 moves to the valve opening position. Then, the coil assembly 2 is powered off. The first moving iron core 32 is attracted to the static iron core 31 under the action of the magnetic field of the first annular permanent magnet 6 and remains in the valve opening position to open the valve. Under the combined action of the magnetic field of the coil assembly 2 and the magnetic field of the second annular permanent magnet 7, the attraction between the second moving iron core 33 and the static iron core 31 is greater than the elastic force of the second elastic reset member 5. The second moving iron core 33 overcomes the elastic force of the second elastic reset member 5 and moves toward the direction close to the static iron core 31 until the second moving iron core 33 moves to the valve opening position, and then the coil assembly 2 is powered off. Under the action of the magnetic field of the second annular permanent magnet 7, the second moving iron core 33 attracts the static iron core 31 and remains in the valve opening position to open the valve; when the coil assembly 2 is connected to a reverse current, the magnetic field generated by the coil assembly 2 is opposite to the magnetic fields generated by the first annular permanent magnet 6 and the second annular permanent magnet 7. Under the joint action of the magnetic field of the coil assembly 2 and the magnetic field of the first annular permanent magnet 6, the attraction between the first moving iron core 32 and the static iron core 31 is smaller than the elastic force of the first elastic reset member 4. Under the action of the elastic force of the first elastic reset member 4, the first moving iron core 32 automatically moves in a direction away from the static iron core 31 to close the valve. Under the joint action of the magnetic field of the coil assembly 2 and the magnetic field of the second annular permanent magnet 7, the attraction between the second moving iron core 33 and the static iron core 31 is smaller than the elastic force of the second elastic reset member 5. Under the action of the elastic force of the second elastic reset member 5, the second moving iron core 33 automatically moves in a direction away from the static iron core 31 to close the valve. Preferably, the valve opening position is a position where the first moving iron core 32 or the second moving iron core 33 moves to a state where the first moving iron core 32 or the second moving iron core 33 contacts the static iron core 31 to form an attracted state.

[0027] Please refer to the attached Figure 1 To Attachment Figure 3 In one preferred embodiment, the first elastic return member 4 and the second elastic return member 5 are both compression springs, and an axial recessed hole is provided at the inner end of the first moving iron core 32 and the second moving iron core 33. One end of the two compression springs is respectively embedded in the corresponding axial recessed holes of the first moving iron core 32 and the second moving iron core 33, and the other ends of the two compression springs are respectively abutted against the corresponding end positions of the static iron core 31.

[0028] Please refer to the attached Figure 1 To Attachment Figure 3In one preferred embodiment, the first moving iron core 32 and the second moving iron core 33 are respectively provided with a first rubber sealing plug 321 and a second rubber sealing plug 322 for sealing the transmission channel. The first moving iron core 32 and the second moving iron core 33 respectively drive the corresponding first rubber sealing plug 321 and the second rubber sealing plug 322 to move, so that the first rubber sealing plug 321 and the second rubber sealing plug 322 block or open the communication opening on the corresponding transmission channel to achieve the synchronous closing or opening of the two transmission channels.

[0029] Please refer to the attached Figure 1 To Attachment Figure 3 In one preferred embodiment, two cylindrical plastic cores 8 are further included. The inner ends of the two cylindrical plastic cores 8 are respectively inserted into the axial through hole 21 of the coil assembly 2 from the two openings 11 on the main frame 1 and are sealed and connected with the two ends of the static iron core 31 inside the axial through hole 21. The first moving iron core 32 and the second moving iron core 33 are configured to be respectively and movably embedded in the corresponding cylindrical plastic cores 8, and the first annular permanent magnet 6 and the second annular permanent magnet 7 are configured to be respectively sleeved on the two cylindrical plastic cores 8. In this embodiment, by movably embedding the moving iron core in the cylindrical plastic core, the internal and external telescopic movement of the moving iron core can be made smoother and more stable, thereby improving its valve closing and opening stability.

[0030] Please refer to the attached Figure 1 To Attachment Figure 3 In one preferred embodiment, the first annular permanent magnet 6 and the second annular permanent magnet 7 are configured to be respectively sleeved on the two cylindrical plastic cores 8 with interference fit, and the first annular permanent magnet 6 and the second annular permanent magnet 7 are respectively pressed against the upper and lower end surfaces of the main frame 1.

[0031] Please refer to the attached Figure 1 To Attachment Figure 3 In one preferred embodiment, both ends of the static iron core 31 are partially embedded in the corresponding cylindrical plastic core 8, and the cylindrical plastic core 8 and the static iron core 31 are connected together by a snap connection structure. However, those skilled in the art should understand that in other embodiments, the static iron core 31 and the cylindrical plastic core 8 can also be connected by other connection structures, not limited to the specific implementation methods disclosed in this embodiment, such as gluing, screwing, etc.

[0032] Please refer to the attached Figure 1 To Attachment Figure 3 In one preferred embodiment, a sealing ring is provided at the nesting position of the static iron core 31 and the cylindrical plastic core 8. In this way, during the valve opening process, water or other substances that penetrate into the cylindrical plastic core 8 through the transmission channel will not enter between the moving iron core and the static iron core and cause water leakage inside the solenoid valve.

[0033] Please refer to the attached Figure 1 To Attachment Figure 3 In one preferred embodiment, it further includes two sleeves 9, which are configured to be respectively nested between the outer walls of the two cylindrical plastic cores 8 and the inner walls of the axial through hole 21 with interference fit, and the outer ends of the sleeves 9 extend to the surface of the opening 11 of the main frame 1 and contact with the corresponding first annular permanent magnet 6 or second annular permanent magnet 7, while the inner ends of the sleeves 9 extend to a position corresponding to at least part of the inner and outer sides of the static iron core 31.

[0034] Please refer to the attached Figure 1 To Attachment Figure 3 In one preferred embodiment, the main frame 1 and the sleeve 9 are ferromagnetic metal main frame and sleeve structures. Preferably, the main frame 1 and the sleeve 9 are iron main frame and iron sleeve structures. However, those skilled in the art should understand that in other embodiments, the materials of the main frame 1 and the sleeve 9 are not limited to the specific implementation methods disclosed in this embodiment, and can also be other existing conventional metal materials with ferromagnetism, such as nickel, cobalt, etc.

[0035] As described above, the embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents. These modifications or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model. Therefore, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the protection scope of the utility model.

Claims

1. A double-control solenoid valve, characterized in that: The invention comprises a main frame (1), a coil assembly (2) installed in the main frame (1), an axial through hole (21) being provided in the coil assembly (2), and openings (11) corresponding to the two ends of the axial through hole (21) are provided at both ends of the main frame (1), an iron core assembly (3) is provided in the axial through hole (21), and the iron core assembly (3) comprises a static iron core (31) and two first moving iron cores (32) and a second moving iron core (33) respectively arranged corresponding to the two ends of the static iron core (31), and the first moving iron core (32) and the second moving iron core (33) are respectively arranged corresponding to the two ends of the static iron core (31). A first elastic reset member (4) and a second elastic reset member (5) are respectively provided between the corresponding ends of the moving iron core (33) and the stationary iron core (31) for automatically resetting the first moving iron core (32) and the second moving iron core (33) in a direction away from the stationary iron core (31), and a first annular permanent magnet (6) and a second annular permanent magnet (7) are respectively provided at both ends of the main frame (1), and the first moving iron core (32) and the second moving iron core (33) are configured to pass through the first annular permanent magnet (6) and the second annular permanent magnet (7), respectively.

2. The dual-control solenoid valve according to claim 1, characterized in that: The first annular permanent magnet (6), the static iron core (31) and the second annular permanent magnet (7) are coaxially arranged.

3. The dual-control solenoid valve according to claim 2, characterized in that: When a positive current flows through the coil assembly (2), the magnetic field generated by the coil assembly (2) is in the same direction as the magnetic fields generated by the first annular permanent magnet (6) and the second annular permanent magnet (7). Under the combined action of the magnetic field of the coil assembly (2) and the magnetic field of the first annular permanent magnet (6), the attraction between the first moving iron core (32) and the static iron core (31) is greater than the elastic force of the first elastic reset member (4). The first moving iron core (32) overcomes the elastic force of the first elastic reset member (4) and moves toward the static iron core (31) until the first moving iron core (32) moves to the valve opening position. The coil assembly (2) is then powered off, and the first moving iron core (32) is attracted to the static iron core (31) by the magnetic field of the first annular permanent magnet (6) and is kept in the valve opening position to open the valve. Furthermore, under the combined action of the magnetic field of the coil assembly (2) and the magnetic field of the second annular permanent magnet (7), the attraction between the second moving iron core (33) and the static iron core (31) is greater than the elastic force of the second elastic reset member (5), and the second moving iron core (33) overcomes the elastic force of the second elastic reset member (5) and moves toward the static iron core (31) until the second moving iron core (33) is moved. (33) moves to the valve opening position, and then the coil assembly (2) is powered off. The second moving iron core (33) attracts the static iron core (31) under the action of the magnetic field of the second annular permanent magnet (7) and remains in the valve opening position to open the valve; and when the coil assembly (2) is passed through a reverse current, the magnetic field generated by the coil assembly (2) is opposite to the magnetic fields generated by the first annular permanent magnet (6) and the second annular permanent magnet (7). Under the combined action of the magnetic field of the coil assembly (2) and the magnetic field of the first annular permanent magnet (6), the attraction between the first moving iron core (32) and the static iron core (31) is The force is smaller than the elastic force of the first elastic reset member (4), and the first movable iron core (32) automatically moves in a direction away from the static iron core (31) under the elastic force of the first elastic reset member (4) to close the valve, and the magnetic field of the coil assembly (2) and the magnetic field of the second annular permanent magnet (7) make the attraction between the second movable iron core (33) and the static iron core (31) smaller than the elastic force of the second elastic reset member (5), and the second movable iron core (33) automatically moves in a direction away from the static iron core (31) under the elastic force of the second elastic reset member (5) to close the valve.

4. The dual-control solenoid valve according to claim 1, characterized in that: The first elastic return member (4) and the second elastic return member (5) are both compression springs, one end of each of the two compression springs respectively abuts against the inner ends of the corresponding first moving iron core (32) and second moving iron core (33), and the other ends of each of the two compression springs respectively abut against the corresponding end positions of the stationary iron core (31).

5. The dual-control solenoid valve according to claim 1, characterized in that: A first rubber sealing plug (321) and a second rubber sealing plug (322) for sealing the transmission channel are respectively provided at the outer ends of the first moving iron core (32) and the second moving iron core (33).

6. The dual-control solenoid valve according to any one of claims 1 to 5, characterized in that: It also includes two cylindrical plastic cores (8), the inner ends of the two cylindrical plastic cores (8) are respectively inserted into the axial through hole (21) of the coil assembly (2) from two openings (11) on the main frame (1) and are sealed together with the two ends of the static iron core (31) inside the axial through hole (21); the first moving iron core (32) and the second moving iron core (33) are configured to be respectively and movably embedded in the corresponding cylindrical plastic cores (8); and the first annular permanent magnet (6) and the second annular permanent magnet (7) are configured to be respectively sleeved on the two cylindrical plastic cores (8).

7. The dual-control solenoid valve according to claim 6, characterized in that: The first annular permanent magnet (6) and the second annular permanent magnet (7) are configured to be respectively sleeved on two cylindrical plastic cores (8) in an interference fit manner, and the first annular permanent magnet (6) and the second annular permanent magnet (7) are respectively pressed against the upper and lower end surfaces of the main frame (1).

8. The dual-control solenoid valve according to claim 7, characterized in that: It also includes two sleeves (9), which are configured to be respectively inserted between the outer walls of the two cylindrical plastic cores (8) and the inner walls of the axial through hole (21) in an interference fit, and the outer ends of the sleeves (9) extend to the surface of the opening (11) of the main frame (1) and abut against the corresponding first annular permanent magnet (6) or second annular permanent magnet (7), while the inner ends of the sleeves (9) extend to a position corresponding to at least part of the inner and outer sides of the static iron core (31).

9. The dual-control solenoid valve according to claim 8, characterized in that: The main frame (1) and the sleeve (9) are made of ferromagnetic metal.

10. The dual-control solenoid valve according to claim 9, characterized in that: The main frame (1) and the sleeve (9) are an iron main frame and an iron sleeve structure.

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