Double-control electromagnetic valve

Abstract

The utility model discloses a double-control electromagnetic valve which comprises a main frame and a coil assembly installed in the main frame, an axial through hole is formed in the coil assembly, and openings corresponding to the two ends of the axial through hole respectively are formed in the main frame. A permanent magnet, two static iron cores and two movable iron cores are arranged in the axial through hole, the two static iron cores are arranged at the two ends of the permanent magnet respectively, the two movable iron cores correspond to the outer side ends of the two static iron cores respectively, and elastic reset pieces used for enabling the movable iron cores to automatically reset in the direction away from the static iron cores are arranged between the two movable iron cores and the two corresponding static iron cores respectively. According to the utility model, the whole structure is simple and compact, the coil assembly can synchronously control the two valve structures only through 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, which can synchronously control the opening and closing of two groups of valve structures using one coil assembly, 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 includes a main frame and a coil assembly installed in the main frame. An axial through hole is provided in the coil assembly, and openings corresponding to the two ends of the axial through hole are formed on the main frame. A permanent magnet, two static iron cores respectively arranged at the two ends of the permanent magnet and two moving iron cores respectively corresponding to the outer ends of the two static iron cores are provided in the axial through hole. An elastic reset member for automatically resetting the moving iron core in a direction away from the static iron core is provided between the two moving iron cores and the two corresponding static iron cores.

[0006] Furthermore, when a forward current is passed through the coil assembly, the magnetic field generated by the coil assembly is in the same direction as the magnetic field generated by the permanent magnet. Under the combined action of the magnetic field of the coil assembly and the magnetic field of the permanent magnet, the attraction between the moving iron core and the corresponding static iron core is greater than the elastic force of the elastic reset part. The moving iron core overcomes the elastic force of the corresponding elastic reset part and moves toward the static iron core until the 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 permanent magnet, the moving iron core attracts the static iron core and remains in the valve opening position to achieve valve opening. When a reverse current is passed through the coil assembly, the magnetic field generated by the coil assembly is in the opposite direction to the magnetic field generated by the permanent magnet. Under the combined action of the magnetic field of the coil assembly and the magnetic field of the permanent magnet, the attraction between the moving iron core and the corresponding static iron core is less than the elastic force of the elastic reset part. Under the action of the elastic force of the elastic reset part, the moving iron core automatically moves away from the static iron core to achieve valve closing.

[0007] Furthermore, the elastic reset member is a compression spring, one end of the compression spring abuts against the inner end of the moving iron core, and the other end of the compression spring abuts against the outer end of the stationary iron core.

[0008] The valve opening position is the position where the moving iron core moves to a state where it contacts the stationary iron core and forms an attracted state.

[0009] Furthermore, a rubber sealing plug for sealing the transmission channel is provided at the outer end of the moving iron core.

[0010] 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 static iron core on the corresponding side inside the axial through hole, and the two moving iron cores are configured to be respectively and adaptively embedded in the cylindrical plastic core on the corresponding side.

[0011] Furthermore, the static iron core is partially embedded in the cylindrical plastic core, and the cylindrical plastic core and the static iron core are connected together through a snap connection structure.

[0012] Furthermore, a sealing ring is provided at the nesting position between the static iron core and the cylindrical plastic core.

[0013] The above technical solution has the following advantages or beneficial effects:

[0014] 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 action of the two moving iron cores is synchronously controlled by the coil assembly with positive and reverse power supply, a permanent magnet located in the middle of the two static iron cores and elastic reset parts respectively arranged between the two static iron cores and the two corresponding moving iron cores to realize the synchronous opening and closing control of the two valve structures. The overall structure is simple and compact, and the coil assembly only needs one control circuit, which will not occupy too many IO ports of the single-chip computer, which is conducive to realizing structural miniaturization and circuit miniaturization. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of the utility model.

[0016] Figure 2 It is a structural sectional view of an embodiment of the utility model.

[0017] Figure 3 It is a three-dimensional structure explosion diagram of an embodiment of the utility model.

[0018] Description of labels:

[0019] 1. Main frame, 2. Coil assembly, 3. Permanent magnet, 4. Static iron core, 5. Moving iron core, 6. Elastic reset member, 7. Cylindrical plastic core, 8. Sleeve, 11. Opening, 21. Axial through hole, 51. Rubber sealing plug. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0021] 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.

[0022] Please refer to the attached Figure 1 To Attachment Figure 3 An 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 formed on the main frame 1, a permanent magnet 3, two static iron cores 4 respectively arranged at the two ends of the permanent magnet 3 and two moving iron cores 5 corresponding to the outer ends of the two static iron cores 4 are provided in the axial through hole 21, and an elastic reset member 6 for automatically resetting the moving iron core 5 in a direction away from the static iron core 4 is provided between the two moving iron cores 5 and the two corresponding static iron cores 4. It can be understood that, in the present embodiment, only one coil assembly 2 is provided in the dual-control solenoid valve, and the positively and reversely energized coil assembly 2 cooperates with a permanent magnet 3 located between the two static iron cores 4 and an elastic reset member 6 respectively provided between the two static iron cores 4 and the two corresponding moving iron cores 5 to synchronously control the movement of the two moving iron cores 5 and thereby realize the synchronous opening and closing control of the two valve structures. The overall structure is simple and compact, and the coil assembly 2 only needs one control circuit, which will not occupy too many IO ports of the single-chip computer, and is conducive to realizing structural miniaturization and circuit miniaturization.

[0023] Please refer to the attached Figure 1 To Attachment Figure 3 In one preferred embodiment, when the coil assembly 2 is passed through a forward current, the magnetic field generated by the coil assembly 2 is in the same direction as the magnetic field generated by the permanent magnet 3. Under the joint action of the magnetic field of the coil assembly 2 and the magnetic field of the permanent magnet 3, the attraction between the moving iron core 5 and the corresponding static iron core 4 is greater than the elastic force of the elastic reset member 6. The moving iron core 5 overcomes the elastic force of the corresponding elastic reset member 6 and moves toward the static iron core 4 until the two are attracted. Then the coil assembly 2 is powered off. The moving iron core 5 overcomes the elastic force of the elastic reset member 6 under the action of the magnetic field of the permanent magnet 3 and maintains an attracted state with the static iron core 4 to achieve valve opening; and when the coil assembly 2 is passed through a reverse current, the magnetic field generated by the coil assembly 2 is in the opposite direction to the magnetic field generated by the permanent magnet 3. Under the joint action of the magnetic field of the coil assembly 2 and the magnetic field of the permanent magnet 3, the attraction between the moving iron core 5 and the corresponding static iron core 4 is less than the elastic force of the elastic reset member 6. The moving iron core 5 automatically moves away from the static iron core 4 under the elastic force of the elastic reset member 6 to achieve valve closing.

[0024] Please refer to the attached Figure 1 To Attachment Figure 3 In one preferred embodiment, the elastic reset member 6 is a compression spring, an axial recessed hole is provided at the inner end of the moving iron core 5, one end of the compression spring is embedded in the axial recessed hole of the moving iron core 5, and the other end abuts against the outer end of the stationary iron core 4.

[0025] Please refer to the attached Figure 1 To Attachment Figure 3 In one preferred embodiment, a rubber sealing plug 51 for sealing the transmission channel is provided at the outer end of the moving iron core 5. The moving iron core 5 drives the rubber sealing plug 51 to move, thereby making the rubber sealing plug 51 block or open the connecting opening on the transmission channel to realize the synchronous closing or opening of the two transmission channels.

[0026] Please refer to the attached Figure 1 To Attachment Figure 3 In one preferred embodiment, two cylindrical plastic cores 7 are further included. The inner ends of the two cylindrical plastic cores 7 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 sealedly connected with the static iron core 4 on the corresponding side of the inner side of the axial through hole 21. The two moving iron cores 5 are configured to be respectively and movably embedded in the cylindrical plastic cores 7 on the corresponding side. In this embodiment, by movably embedding the moving iron core 5 in the cylindrical plastic core 7, the inward and outward telescopic movement of the moving iron core 5 can be made smoother and more stable, thereby improving its valve closing and opening stability.

[0027] Please refer to the attached Figure 1 To Attachment Figure 3 In one preferred embodiment, the static iron core 4 is partially embedded in the cylindrical plastic core 7, and the cylindrical plastic core 7 and the static iron core 4 are connected together by a snap connection structure. However, those skilled in the art should understand that in other embodiments, the static iron core 4 and the cylindrical plastic core 7 can also be connected by other connection structures, not limited to the specific implementation methods disclosed in this embodiment, such as gluing, screwing, etc.

[0028] 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 4 and the cylindrical plastic core 7. In this way, during the valve opening process, water or other substances that penetrate into the cylindrical plastic core 7 through the transmission channel will not enter between the moving iron core 5 and the static iron core 4 and cause water leakage inside the solenoid valve.

[0029] Please refer to the attached Figure 1 To Attachment Figure 3In one preferred embodiment, it further includes two sleeves 8, which are configured to be respectively nested between the outer walls of the two cylindrical plastic cores 7 and the inner walls of the axial through holes 21 with interference fit, and the outer ends of the sleeves 8 extend to the surface of the opening 11 of the main frame 1, while the inner ends of the sleeves 8 extend to a position corresponding to at least part of the inside and outside of the static iron core 4.

[0030] Please refer to the attached Figure 1 To Attachment Figure 3 In one preferred embodiment, the main frame 1 and the sleeve 8 are ferromagnetic metal main frame and sleeve structures. Preferably, the main frame 1 and the sleeve 8 are iron main frame and iron sleeve structures. However, those skilled in the art should understand that in other embodiments, the material of the main frame 1 and the sleeve 8 is not limited to the specific implementation disclosed in this embodiment, and can also be other existing conventional metal materials with ferromagnetism, such as nickel, cobalt, etc.

[0031] 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) and a coil assembly (2) installed in the main frame (1); an axial through hole (21) is provided in the coil assembly (2); openings (11) corresponding to the two ends of the axial through hole (21) are formed on the main frame (1); a permanent magnet (3), two static iron cores (4) respectively arranged at the two ends of the permanent magnet (3) and two moving iron cores (5) respectively corresponding to the outer ends of the two static iron cores (4) are provided in the axial through hole (21); an elastic reset member (6) for automatically resetting the moving iron core (5) in a direction away from the static iron core (4) is provided between the two moving iron cores (5) and the two corresponding static iron cores (4).

2. The dual-control solenoid valve according to claim 1, characterized in that: When a positive current flows through the coil assembly (2), the magnetic field generated by the coil assembly (2) and the magnetic field generated by the permanent magnet (3) are in the same direction. Under the combined action of the magnetic field of the coil assembly (2) and the magnetic field of the permanent magnet (3), the attraction between the moving iron core (5) and the corresponding static iron core (4) is greater than the elastic force of the elastic reset member (6). The moving iron core (5) overcomes the elastic force of the corresponding elastic reset member (6) and moves toward the static iron core (4) until the moving iron core (5) moves to the valve opening position. Then, the coil assembly (2) is powered off and the moving iron core (5) moves between the permanent magnet ( When the coil assembly (2) is subjected to a reverse current, the magnetic field generated by the coil assembly (2) is in the opposite direction to the magnetic field generated by the permanent magnet (3). Under the combined action of the magnetic fields of the coil assembly (2) and the permanent magnet (3), the attraction between the moving iron core (5) and the corresponding stationary iron core (4) is smaller than the elastic force of the elastic reset member (6). The moving iron core (5) automatically moves away from the stationary iron core (4) under the elastic force of the elastic reset member (6) to close the valve.

3. The dual-control solenoid valve according to claim 2, characterized in that: The elastic reset member (6) is a compression spring, one end of which abuts against the inner end of the moving iron core (5) and the other end of which abuts against the outer end of the stationary iron core (4).

4. The dual-control solenoid valve according to claim 2, characterized in that: The valve opening position is a state where the moving iron core (5) moves to a position where the moving iron core (5) contacts the stationary iron core (4) to form an attracted state.

5. The dual-control solenoid valve according to claim 1, characterized in that: A rubber sealing plug (51) for sealing the transmission channel is provided at the outer end of the moving iron core (5).

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 (7), the inner ends of the two cylindrical plastic cores (7) 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 together with the static iron core (4) on the corresponding side inside the axial through hole (21), and the two moving iron cores (5) are configured to be respectively adapted and movably embedded in the cylindrical plastic core (7) on the corresponding side.

7. The dual-control solenoid valve according to claim 6, characterized in that: The static iron core (4) is partially embedded in the cylindrical plastic core (7), and the cylindrical plastic core (7) and the static iron core (4) are connected together via a snap-fit ​​connection structure.

8. The dual-control solenoid valve according to claim 7, characterized in that: A sealing ring is provided at the nesting position between the static iron core (4) and the cylindrical plastic core (7).

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