Solenoid valves and gas appliances

Abstract

The present invention relates to a solenoid valve and a gas appliance, wherein the solenoid valve comprises a valve body; a valve core; a valve opening assembly, comprising a valve opening coil, which drives the valve core to enter a valve opening state after being energized; a maintaining assembly, comprising a maintaining coil, a transmission member and a lever, wherein the lever has a rotating part, a movable part and a connecting part which are movably connected to the valve body, the valve core and the transmission member in a one-to-one correspondence, and the distance between the rotating part and the connecting part is greater than the distance between the rotating part and the movable part; an elastic member, which is used to drive the valve core to enter a valve closing state after the valve opening coil and the maintaining coil are both powered off; after the valve opening coil is energized to drive the valve core to enter a valve opening state, the maintaining coil is energized, and the maintaining coil provides a force to the lever to keep the valve core in a valve opening state through the transmission member. According to the lever principle, the electromagnetic force provided by the maintaining coil is less than the elastic force of the elastic member, thereby reducing the electromagnetic force required to keep the valve core in the valve opening state, and effectively reducing power consumption.

Description

Technical Field

[0001] The present invention relates to the technical field of control valves, and in particular to a solenoid valve and a gas appliance. Background Art

[0002] Solenoid valve is a control valve, which is a basic component for controlling fluids. It is an actuator and is not limited to hydraulic or pneumatic. Solenoid valve can be used with different circuits to achieve the desired control, and the control accuracy and flexibility can be guaranteed.

[0003] When a traditional solenoid valve is in an open state, the electromagnetic force generated by the solenoid valve is required to be greater than the elastic force of the valve core returning to its original position. If this state lasts for a long time, more electricity will be consumed. If a dry cell battery is used for power supply, the service life of the dry cell battery will be shortened. Summary of the invention

[0004] The first technical problem solved by the present invention is to provide a solenoid valve which can effectively reduce power consumption.

[0005] The second technical problem solved by the present invention is to provide a gas appliance which can effectively reduce power consumption.

[0006] The first technical problem mentioned above is solved by the following technical solution:

[0007] A solenoid valve comprises a valve body; a valve core; a valve opening assembly, comprising a valve opening coil, wherein the valve opening coil drives the valve core to enter a valve opening state when energized; a maintaining assembly, comprising a maintaining coil, a transmission member and a lever, wherein the lever comprises a rotating portion, a movable portion and a connecting portion which are movably connected to the valve body, the valve core and the transmission member in a one-to-one correspondence, wherein the distance between the rotating portion and the connecting portion is greater than the distance between the rotating portion and the movable portion; an elastic member, which is used to drive the valve core to enter a valve closing state after the valve opening coil and the maintaining coil are both powered off; after the valve opening coil is energized to drive the valve core to enter the valve opening state, the maintaining coil is energized, and the maintaining coil provides a force to the lever through the transmission member to keep the valve core in the valve opening state.

[0008] The solenoid valve described in the present invention has the following beneficial effects compared with the background technology: when the solenoid valve starts to work, the valve opening coil is energized, and the current flows entirely through the valve opening coil, which can ensure that a large electromagnetic force is generated instantly, so that the valve core is quickly switched from the valve closing state to the valve opening state. After the valve core enters the valve opening state, the coil is energized, and the electromagnetic force generated keeps the valve core in the valve opening state through the transmission member and the lever. Since the distance between the rotating part and the connecting part is greater than the distance between the rotating part and the movable part, according to the lever principle, the electromagnetic force provided by the maintaining coil is less than the elastic force of the elastic member, and the maintaining coil can also maintain the valve core in the valve opening state, thereby reducing the electromagnetic force required to keep the valve core in the valve opening state, effectively reducing power consumption, and if dry batteries are used for power supply, it is beneficial to extend the service life of the dry batteries.

[0009] In one embodiment, the resistance of the holding coil is greater than the resistance of the valve opening coil; and / or, when the holding coil is energized, the holding coil and the valve opening coil are energized in series. The currents passing through the holding coil and the valve opening coil are equal, and since the resistance of the holding coil is greater than the resistance of the valve opening coil, the electromagnetic force that maintains the valve core in the valve opening state is mainly provided by the holding coil.

[0010] In one embodiment, the valve core includes a first fixed shaft, a first movable shaft and a valve cap, one end of the first movable shaft is detachably engaged with the first fixed shaft, the other end of the first movable shaft is connected to the valve cap, and the end of the first movable shaft close to the valve cap is also movably connected to the movable part.

[0011] In one embodiment, the elastic member is located between the first movable shaft and the first fixed shaft, and two ends of the elastic member are elastically abutted against the first movable shaft and the first fixed shaft respectively.

[0012] In one embodiment, the valve opening assembly further includes a first bracket, the first bracket is provided with a first cavity for accommodating the valve core, and the valve opening coil is wound around the periphery of the first bracket.

[0013] In one embodiment, the transmission member includes a second fixed shaft and a second movable shaft, one end of the second movable shaft is detachably engaged with the second fixed shaft, and the other end of the second movable shaft is movably connected to the connecting portion.

[0014] In one embodiment, the maintaining assembly further includes a second bracket, the second bracket is provided with a second cavity for accommodating the transmission member, and the maintaining coil is wound around the periphery of the second bracket.

[0015] In one embodiment, the movable portion is located between the rotating portion and the connecting portion; or, the rotating portion is located between the movable portion and the connecting portion.

[0016] In one embodiment, a valve cavity is provided in the valve body, a valve port connected to the valve cavity and a through port connected to the valve cavity are provided on the valve body, one end of the valve core is located in the valve cavity, the valve core is used to block the valve port, the lever is located in the valve cavity, and the rotating part is movably connected to the side wall of the valve cavity.

[0017] The above second technical problem is solved by the following technical solution:

[0018] A gas appliance comprises the solenoid valve.

[0019] The gas appliance described in the present invention has the following beneficial effects compared with the background technology: when the solenoid valve starts to work, the valve opening coil is energized, and the current flows entirely through the valve opening coil, which can ensure that a large electromagnetic force is generated instantly, so that the valve core is quickly switched from the valve closing state to the valve opening state. After the valve core enters the valve opening state, the coil is energized, and the electromagnetic force generated keeps the valve core in the valve opening state through the transmission member and the lever. Since the distance between the rotating part and the connecting part is greater than the distance between the rotating part and the movable part, according to the lever principle, the electromagnetic force provided by the maintaining coil is less than the elastic force of the elastic member, and the maintaining coil can also keep the valve core in the valve opening state, thereby reducing the electromagnetic force required to keep the valve core in the valve opening state, effectively reducing power consumption, and if dry batteries are used for power supply, it is beneficial to extend the service life of the dry batteries. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the solenoid valve according to an embodiment of the present invention in a power-off state, and the valve core is in a closed valve state;

[0021] Figure 2 for Figure 1 The structure diagram of the solenoid valve shown is in the energized state, and the valve core is in the valve open state;

[0022] Figure 3 for Figure 1 A schematic diagram of the structure of the lever of the solenoid valve shown;

[0023] Figure 4 The figure is a circuit diagram of a solenoid valve according to an embodiment of the present invention.

[0024] The meanings of the symbols in the accompanying drawings are:

[0025] Valve core 10, first fixed shaft 11, first convex ring 111, positioning groove 112, first movable shaft 12, first groove 121, first limiting groove 122, valve cap 13, valve opening assembly 20, valve opening coil 21, first bracket 22, first guide cylinder 23, first sealing ring 24, maintaining assembly 30, maintaining coil 31, transmission member 32, lever 33, rotating part 331, movable part 332, connecting part 333, movable groove 334, connecting groove 335, second fixed shaft 34, second convex ring 341, second movable shaft 35, second Groove 351, second limiting groove 352, second bracket 36, second guide cylinder 37, second sealing ring 38, elastic member 40, valve body 50, valve cavity 51, valve port 52, through port 53, first magnetic conductive shell 60, first accommodating space 61, first magnetic conductive frame 62, first magnetic conductive plate 63, first inner plate 64, first outer plate 65, first sealing ring 66, second magnetic conductive shell 70, second accommodating space 71, second magnetic conductive frame 72, second magnetic conductive plate 73, second inner plate 74, second outer plate 75, second sealing ring 76. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0027] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0031] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0032] Please refer to Figures 1 to 3 , is a solenoid valve according to an embodiment of the invention. Please refer to Figure 1 The solenoid valve includes a valve core 10, a valve opening assembly 20, a maintenance assembly 30, an elastic member 40 and a valve body 50. The valve opening assembly 20 includes a valve opening coil 21, which drives the valve core 10 to enter the valve opening state after being energized. The maintenance assembly 30 includes a maintenance coil 31, a transmission member 32 and a lever 33. The lever 33 has a rotating part 331, a movable part 332 and a connecting part 333 that are movably connected to the valve body 50, the valve core 10 and the transmission member 32 in a one-to-one correspondence. The distance L2 between the rotating part 331 and the connecting part 333 is greater than the distance L1 between the rotating part 331 and the movable part 332. The elastic member 40 is used to drive the valve core 10 to enter the valve closing state after the valve opening coil 21 and the maintenance coil 31 are both de-energized. After the valve opening coil 21 is energized to drive the valve core 10 to enter the valve opening state, the maintenance coil 31 is energized, and the maintenance coil 31 provides a force to the lever 33 through the transmission member 32 to keep the valve core 10 in the valve opening state.

[0033] The electromagnetic valve of the present invention has the following beneficial effects compared with the background technology: when the electromagnetic valve starts to work, the valve opening coil 21 is energized, and the current flows through the valve opening coil 21, which can ensure that a large electromagnetic force is generated instantly, so that the valve core 10 is quickly switched from the valve closing state to the valve opening state. After the valve core 10 enters the valve opening state, the maintenance coil 31 is energized, and the electromagnetic force generated keeps the valve core 10 in the valve opening state through the transmission member 32 and the lever 33. Since the distance L2 between the rotating part 331 and the connecting part 333 is greater than the distance L1 between the rotating part 331 and the movable part 332, according to the principle of the lever 33, the electromagnetic force provided by the maintenance coil 31 is less than the elastic force of the elastic member 40, and the maintenance coil 31 can also maintain the valve core 10 in the valve opening state, thereby reducing the electromagnetic force required to keep the valve core 10 in the valve opening state, effectively reducing power consumption, and if a dry battery is used for power supply, it is beneficial to extend the service life of the dry battery.

[0034] Specifically, the elastic force of the elastic member 40 driving the valve core 10 to enter the valve closing state is set to F1, and the electromagnetic force of the maintaining coil 31 maintaining the valve core 10 in the valve opening state is set to F2. According to the principle of the lever 33, the following relationship is obtained:

[0035] F1×L1=F2×L2

[0036] If the distance length L2 is n times that of L1, n>1, then F2 is F1 Thus, the electromagnetic force provided by the coil 31 is maintained to be the elastic force of the elastic member 40. When the valve core 10 is opened, the valve core 10 can be maintained in the open state.

[0037] In addition, the formula for electromagnetic force is as follows:

[0038]

[0039] in:

[0040] F—Electromagnetic force

[0041] N—Number of coil turns

[0042] I—Current intensity

[0043] μ0—vacuum magnetic permeability

[0044] K f —Magnetic leakage coefficient

[0045] δ—Air gap length

[0046] S—magnetic circuit cross-sectional area

[0047] From the above formula, it can be seen that when other factors such as the number of coil turns, vacuum magnetic permeability, magnetic leakage coefficient, air gap length and cross-sectional area remain unchanged, the current required to maintain coil 31 is only the current required when the valve opening coil 21 is energized alone. The valve core 10 can be maintained in the valve-opening state, so that the current input to the maintaining coil 31 is relatively small, which is effective in reducing power consumption.

[0048] The resistance of the maintaining coil 31 is much greater than the resistance of the valve opening coil 21. Furthermore, the number of turns of the maintaining coil 31 is greater than the number of turns of the valve opening coil 21.

[0049] In this embodiment, when the maintaining coil 31 is energized, the maintaining coil 31 is connected in series with the valve opening coil 21, so that the maintaining coil 31 and the valve opening coil 21 are energized in series, and the currents passing through the maintaining coil 31 and the valve opening coil 21 are equal. Since the resistance of the maintaining coil 31 is greater than the resistance of the valve opening coil 21, the current flowing through the maintaining coil 31 and the valve opening coil 21 is smaller, so that the electromagnetic force that maintains the valve core 10 in the valve opening state is mainly provided by the maintaining coil 31.

[0050] Specifically, please refer to Figure 4 , the first end of the valve opening coil 21 serves as a common terminal, and the common terminal is used as a positive terminal or a negative terminal shared by the valve opening coil 21 and the maintaining coil 31. The first end of the maintaining coil 31 serves as a maintaining terminal, and the second end of the maintaining coil 31 is connected to the second end of the valve opening coil 21, and the movable part 332 of the valve opening coil 21 and the maintaining coil 31 is led out through a wire as a valve opening terminal. In this embodiment, the common terminal serves as a negative terminal shared by the valve opening coil 21 and the maintaining coil 31, and accordingly, the valve opening terminal serves as a positive terminal of the valve opening coil 21, and the maintaining terminal serves as a positive terminal of the maintaining coil 31. When the valve opening terminal is electrically connected to the common terminal, the valve opening coil 21 is energized; when the maintaining terminal is electrically connected to the common terminal, the maintaining coil 31 is energized.

[0051] When the solenoid valve starts working, the valve opening coil 21 is energized, and the current all flows through the valve opening coil 21; or the valve opening coil 21 and the maintaining coil 31 are energized at the same time. Since the resistance of the maintaining coil 31 is much larger than that of the valve opening coil 21, the maintaining coil 31 is equivalent to being short-circuited, and the current all flows through the valve opening coil 21. The resistance of the valve opening coil 21 is small, so that the current of the switch coil is large, which can ensure that a large electromagnetic force is generated instantly, so that the valve core 10 can quickly switch from the valve closing state to the valve opening state. Then, the valve opening coil 21 is powered off and the maintaining coil 31 is powered on. At this time, the valve opening coil 21 and the maintaining coil 31 are connected in series to the circuit, and current flows through the valve opening coil 21 and the maintaining coil 31. The currents flowing through the maintaining coil 31 and the valve opening coil 21 are equal. Since the resistance of the maintaining coil 31 is greater than the resistance of the valve opening coil 21, the current flowing through the maintaining coil 31 and the valve opening coil 21 is much smaller than the current when the valve opening coil 21 is powered on alone. Therefore, the electromagnetic force that maintains the valve core 10 in the valve opening state is mainly provided by the maintaining coil 31, that is, the electromagnetic force generated by the maintaining coil 31 is transmitted to the lever 33 through the transmission member 32, so that the valve core 10 is maintained in the valve opening state. When the valve opening coil 21 and the maintaining coil 31 are both powered off, the electromagnetic force disappears, and the valve core 10 is restored to switch from the valve opening state to the valve closing state under the action of the elastic member 40.

[0052] Of course, in other embodiments, the common terminal can also be used as the positive terminal shared by the valve opening coil 21 and the maintaining coil 31. Correspondingly, the valve opening terminal is used as the negative terminal of the valve opening coil 21, and the maintaining terminal is used as the negative terminal of the maintaining coil 31. The working principle can refer to the above embodiment.

[0053] Of course, in other embodiments, the valve opening coil 21 and the maintaining coil 31 may be connected to the circuit separately, so that when the valve opening coil 21 is energized, the maintaining coil 31 is in a power-off state, and when the maintaining coil 31 is energized, the valve opening coil 21 is in a power-off state.

[0054] Please refer to Figure 1 The valve core 10 includes a first fixed shaft 11, a first movable shaft 12 and a valve cap 13. The first movable shaft 12 is coaxially arranged with the first fixed shaft 11. One end of the first movable shaft 12 is detachably matched with the first fixed shaft 11. The other end of the first movable shaft 12 is connected to the valve cap 13, and the end of the first movable shaft 12 close to the valve cap 13 is also movably connected to the movable part 332 of the lever 33. The first fixed shaft 11 and the first movable shaft 12 are both iron cores, so that when the valve opening coil 21 is energized, under the action of electromagnetic force, the first movable shaft 12 is attracted to the first fixed shaft 11, and the first movable shaft 12 overcomes the elastic force of the elastic member 40 to drive the valve cap 13 to move in the direction close to the first fixed shaft 11, and the valve core 10 is switched from the valve closing state to the valve opening state.

[0055] Please refer to Figure 2Further, a first convex ring 111 is provided at one end of the first fixed shaft 11 close to the first movable shaft 12, and the first convex ring 111 is in a circular ring shape. A first groove 121 is provided at one end of the first movable shaft 12 close to the first fixed shaft 11, and the first groove 121 is in a circular ring shape. When the first movable shaft 12 and the first fixed shaft 11 are adsorbed, the first convex ring 111 is inserted into the first groove 121, which is conducive to ensuring the stability of the adsorption between the first movable shaft 12 and the first fixed shaft 11. Of course, in other embodiments, the first groove 121 may be provided at one end of the first fixed shaft 11 close to the first movable shaft 12, and the first convex ring 111 for mating and plugging with the first groove 121 may be provided at one end of the first movable shaft 12 close to the first fixed shaft 11.

[0056] Please refer again Figure 1 In some embodiments, the valve opening assembly 20 further includes a first bracket 22, and the first bracket 22 is provided with a first cavity for accommodating the valve core 10. The valve opening coil 21 is wound around the periphery of the first bracket 22. Specifically, the first bracket 22 is generally in an "I"-shaped structure.

[0057] In some embodiments, Figure 2 The valve opening assembly 20 further includes a first guide cylinder 23 fixed in the first cavity, the first fixed shaft 11 and the first movable shaft 12 are both disposed in the first guide cylinder 23, the first fixed shaft 11 remains fixed relative to the first guide cylinder 23, and the outer wall surface of the first movable shaft 12 is slidably matched with the inner wall surface of the first guide cylinder 23. The first guide cylinder 23 can guide the movement of the first movable shaft 12, so as to ensure that the first movable shaft 12 can move linearly along a preset direction without deflection, thereby ensuring the stability of the movement of the first movable shaft 12.

[0058] Furthermore, the first guide cylinder 23 and the first fixed shaft 11 are provided with a first sealing ring 24, the first sealing ring 24 is sleeved on the first fixed shaft 11, the inner circumferential wall of the first guide cylinder 23 squeezes the first sealing ring 24, and the first sealing ring 24 can form a reliable positioning and sealing fit between the first fixed shaft 11 and the first guide cylinder 23.

[0059] In some embodiments, Figure 1 The solenoid valve further includes a first magnetic conductive shell 60, which has a first accommodating space 61 for accommodating the valve opening assembly 20. One end of the valve core 10 can be movably passed through the first magnetic conductive shell 60, that is, the end of the first movable shaft 12 connected to the valve cap 13 extends to the outside of the first magnetic conductive shell 60 through the first guide cylinder 23. The first magnetic conductive shell 60 can guide the magnetic lines of force generated by the valve opening coil 21, thereby enhancing the magnetic field.

[0060] Specifically, Figure 2The first magnetic conductive shell 60 includes a first magnetic conductive frame 62 and a first magnetic conductive plate 63. The first magnetic conductive frame 62 is arranged in a U-shape. The first magnetic conductive frame 62 and the first magnetic conductive plate 63 enclose a first accommodating space 61, and the first magnetic conductive plate 63 is provided with a through hole for the end of the movable valve core 10 to pass through. Furthermore, the first magnetic conductive plate 63 includes a first inner plate body 64 and a first outer plate body 65 which are overlapped with each other, and the first inner plate body 64 covers the U-shaped opening end of the first magnetic conductive frame 62.

[0061] In some embodiments, the solenoid valve further includes a first sealing ring 66 disposed between the first magnetic conductive plate 63 and the first guide cylinder 23. The first sealing ring 66 is sleeved on the first guide cylinder 23, and the first sealing ring 66 squeezes the first inner plate 64 and the first outer plate 65. The provision of the first sealing ring 66 can effectively improve the stability and sealing of the cooperation between the first guide cylinder 23 and the first inner plate 64 and the first outer plate 65.

[0062] Please continue to refer to Figure 1 The transmission member 32 is arranged in parallel with the valve core 10, and the transmission member 32 includes a second fixed shaft 34 and a second movable shaft 35. The second movable shaft 35 is coaxially arranged with the second fixed shaft 34, and the axial direction of the second movable shaft 35 is parallel to the axial direction of the first movable shaft 12. One end of the second movable shaft 35 is detachably matched with the second fixed shaft 34, and the other end of the second movable shaft 35 is movably connected with the connecting portion 333 of the lever 33. The second fixed shaft 34 and the second movable shaft 35 are both iron cores, so that when the coil 31 is energized, the second movable shaft 35 is attracted to the second fixed shaft 34 under the action of the electromagnetic force, and the second movable shaft 35 maintains the valve core 10 in the valve-opening state through the lever 33.

[0063] Furthermore, if Figure 2 , a second convex ring 341 is provided at one end of the second fixed shaft 34 close to the second movable shaft 35, and the second convex ring 341 is in a circular ring shape. A second groove 351 is provided at one end of the second movable shaft 35 close to the second fixed shaft 34, and the second groove 351 is in a circular ring shape. When the second movable shaft 35 and the second fixed shaft 34 are attracted to each other, the second convex ring 341 is inserted into the second groove 351, which is conducive to ensuring the stability of the adsorption between the second movable shaft 35 and the second fixed shaft 34. Of course, in other embodiments, the second groove 351 can be provided at one end of the second fixed shaft 34 close to the second movable shaft 35, and the second convex ring 341 for mating and plugging with the second groove 351 can be provided at one end of the second movable shaft 35 close to the second fixed shaft 34.

[0064] In such Figure 1In the embodiment shown, the rotating portion 331 and the connecting portion 333 are respectively located at the two ends of the lever 33, and the movable portion 332 is located between the rotating portion 331 and the connecting portion 333. Of course, in other embodiments, the movable portion 332 and the connecting portion 333 may be respectively located at the two ends of the lever 33, and the rotating portion 331 is located between the movable portion 332 and the connecting portion 333. Figure 2 and Figure 3 The movable portion 332 is provided with a movable groove 334, the first movable shaft 12 is provided with a first limiting groove 122, the movable groove 334 is movably mounted on the first movable shaft 12 via the first limiting groove 122, the movable portion 332 of the lever 33 can perform a rotational movement within a preset range in the first limiting groove 122, and can also move along the axial direction of the first movable shaft 12 with the first movable shaft 12. The connecting portion 333 is provided with a connecting groove 335, the second movable shaft 35 is provided with a second limiting groove 352, the connecting groove 335 is movably mounted on the second movable shaft 35 via the second limiting groove 352, the connecting portion 333 of the lever 33 can perform a rotational movement within a preset range in the second limiting groove 352, and can also move along the axial direction of the second movable shaft 35 with the second movable shaft 35.

[0065] In some embodiments, the maintenance assembly 30 further includes a second bracket 36, and the second bracket 36 is provided with a second cavity for accommodating the transmission member 32. The maintenance coil 31 is wound around the periphery of the second bracket 36. Specifically, the second bracket 36 is generally in an "I"-shaped structure.

[0066] In some embodiments, the maintenance assembly 30 further includes a second guide cylinder 37 fixed in the second cavity, the second fixed shaft 34 and the second movable shaft 35 are both disposed in the second guide cylinder 37, the second fixed shaft 34 remains fixed relative to the second guide cylinder 37, and the outer wall surface of the second movable shaft 35 is slidably matched with the inner wall surface of the second guide cylinder 37. The second guide cylinder 37 can guide the movement of the second movable shaft 35 to ensure that the second movable shaft 35 can move linearly along a preset direction without deflection, thereby ensuring the stability of the movement of the second movable shaft 35.

[0067] Furthermore, a second sealing ring 38 is provided between the second guide cylinder 37 and the second fixed shaft 34. The second sealing ring 38 is sleeved on the second fixed shaft 34. The inner circumferential wall of the second guide cylinder 37 squeezes the second sealing ring 38. The second sealing ring 38 can form a reliable positioning and sealing fit between the second fixed shaft 34 and the second guide cylinder 37.

[0068] Please refer again Figure 1In some embodiments, the solenoid valve further includes a second magnetic conductive shell 70, which is arranged in parallel with the first magnetic conductive shell 60. The second magnetic conductive shell 70 has a second accommodating space 71 for accommodating the maintaining assembly 30. One end of the transmission member 32 can be movably passed through the second magnetic conductive shell 70, that is, the end of the second movable shaft 35 connected to the lever 33 extends to the outside of the second magnetic conductive shell 70 through the second guide cylinder 37. The second magnetic conductive shell 70 can guide the magnetic lines of force generated by the maintaining coil 31, thereby enhancing the magnetic field.

[0069] Specifically, Figure 2 The second magnetic shell 70 includes a second magnetic frame 72 and a second magnetic plate 73. The second magnetic frame 72 is arranged in a U-shape. The second magnetic plate 73 and the second magnetic frame 72 enclose a second accommodating space 71, and the second magnetic plate 73 is provided with a through hole for the movable transmission member 32 to pass through. Further, the second magnetic plate 73 includes a second inner plate body 74 and a second outer plate body 75 which overlap each other, and the second inner plate body 74 covers the U-shaped opening end of the second magnetic frame 72. Furthermore, the second inner plate body 74 is connected flush with the first inner plate body 64, specifically, the second inner plate body 74 and the first inner plate body 64 are integrally formed. The second outer plate body 75 is flush with the first outer plate body 65.

[0070] In some embodiments, the solenoid valve further includes a second sealing ring 76 disposed between the second magnetic conductive plate 73 and the second guide cylinder 37, the second sealing ring 76 is sleeved on the second guide cylinder 37, and the second inner plate 74 and the second outer plate 75 squeeze the second sealing ring 76. The provision of the second sealing ring 76 can effectively improve the stability and sealing of the cooperation between the second guide cylinder 37 and the second inner plate 74 and the second outer plate 75.

[0071] Please refer again Figure 1 , the elastic member 40 is a coil spring. In this embodiment, the elastic member 40 is located between the first movable shaft 12 and the first fixed shaft 11, and the two ends of the elastic member 40 are elastically abutted against the first movable shaft 12 and the first fixed shaft 11 respectively. Specifically, a positioning groove 112 is provided on the first fixed shaft 11, and the positioning groove 112 is located at one end of the first fixed shaft 11 close to the first movable shaft 12. The elastic member 40 is accommodated in the positioning groove 112, and one end of the elastic member 40 passes through the first convex ring 111 and elastically abuts against the first movable shaft 12.

[0072] Of course, in other embodiments, the elastic member 40 may also be located between the valve cap 13 and the first magnetic conductive shell 60. Further, the elastic member 40 is movably sleeved on the first movable shaft 12, the elastic member 40 is located between the lever 33 and the first magnetic conductive shell 60, and the two ends of the elastic member 40 elastically abut the lever 33 and the first magnetic conductive shell 60 respectively.

[0073] The valve body 50 is connected to the first magnetic conductive shell 60 and the second magnetic conductive shell 70. Figure 2 , a valve cavity 51 is provided in the valve body 50, a valve port 52 and a through port 53 communicating with the valve cavity 51 are provided on the valve body 50, one end of the valve core 10 is located in the valve cavity 51, and the valve core 10 is used to block the valve port 52. Further, the valve cap 13 of the valve core 10 is located in the valve cavity 51 and corresponds to the valve port 52. It can be understood that when the valve opening coil 21 is energized, under the action of the electromagnetic force, the first movable shaft 12 and the valve cap 13 are switched from the valve closing position to the valve opening position. At this time, there is a preset interval between the valve cap 13 and the valve port 52, so that the through port 53 is connected to the valve port 52 to form a fluid passage, that is, the valve core 10 enters the valve opening state. When the maintenance coil 31 is energized, the first fixed shaft 11 and the valve cap 13 are both maintained in the valve opening position, that is, the valve core 10 remains in the valve opening state. When the maintaining coil 31 and the valve opening coil 21 are both powered off, the electromagnetic force disappears, and the first fixed shaft 11 and the valve bonnet 13 are restored to the valve closing position driven by the elastic member 40. At this time, the valve bonnet 13 blocks the valve port 52, and the fluid passage is cut off, that is, the valve core 10 enters the valve closing state. The lever 33 is located in the valve cavity 51, and the rotating portion 331 of the lever 33 is movably connected to the side wall of the valve cavity 51. Specifically, a rotating groove is provided on the side wall of the valve cavity 51, and the rotating portion 331 of the lever 33 is movably located in the rotating groove, and the lever 33 can rotate relative to the rotating groove.

[0074] The working principle of the solenoid valve is as follows:

[0075] S1: The valve opening coil 21 is energized, and the current flows through the valve opening coil 21. The electromagnetic force generated causes the first movable shaft 12 to attract the second movable shaft 35, so that the first movable shaft 12 drives the valve bonnet 13 to move in the direction close to the second movable shaft 35, so that the valve bonnet 13 is away from the valve port 52, the valve port 52 is opened, and the through port 53 is connected with the valve port 52 to form a fluid passage, that is, the valve core 10 switches from the closed valve state to the open valve state. In the process of the first movable shaft 12 driving the valve bonnet 13 to move in the direction close to the second movable shaft 35, the first movable shaft 12 simultaneously drives the lever 33 to rotate counterclockwise, and the lever 33 drives the second movable shaft 35 to move in the direction close to the second fixed shaft 34 when rotating. It should be noted that when the valve port 52 is opened, the second movable shaft 35 is in contact with the second fixed shaft 34. In addition, in this step, the maintenance coil 31 can be in the energized state or the de-energized state.

[0076] S2: The maintaining coil 31 is energized, and the current passes through the valve opening coil 21 and the maintaining coil 31. The electromagnetic force generated causes the second movable shaft 35 to attract the second fixed shaft 34. The second movable shaft 35 maintains the valve core 10 in the valve opening state through the lever 33. In this step, the valve opening coil 21 can also be in the power-off state.

[0077] S3: The valve opening coil 21 and the maintaining coil 31 are both powered off, the valve core 10 remains in the valve opening state, the electromagnetic force disappears, the elastic member 40 pushes the first movable shaft 12 to move in the direction away from the first fixed shaft 11, and the first movable shaft 12 drives the valve cap 13 to block the valve port 52, that is, the valve core 10 switches from the valve opening state to the valve closing state. During the process of the elastic member 40 pushing the first movable shaft 12 to move in the direction away from the first fixed shaft 11, the first movable shaft 12 drives the lever 33 to rotate clockwise, and when the lever 33 rotates, it drives the second movable shaft 35 to move in the direction away from the second fixed shaft 34. In the valve closing state, the lever 33 is perpendicular to the axial direction of the first fixed shaft 11 and the second fixed shaft 34.

[0078] The present invention further provides a gas appliance, comprising the solenoid valve of any one of the above embodiments.

[0079] The gas appliance of the present invention has the following beneficial effects compared with the background technology: When the solenoid valve starts to work, the valve opening coil 21 is energized, and the current flows through the valve opening coil 21, which can ensure that a large electromagnetic force is generated instantly, so that the valve core 10 is quickly switched from the valve closing state to the valve opening state. After the valve core 10 enters the valve opening state, the maintenance coil 31 is energized, and the electromagnetic force generated keeps the valve core 10 in the valve opening state through the transmission member 32 and the lever 33. Since the distance between the rotating part 331 and the connecting part 333 is greater than the distance between the rotating part 331 and the movable part 332, according to the principle of the lever 33, the electromagnetic force provided by the maintenance coil 31 is less than the elastic force of the elastic member 40, and the maintenance coil 31 can also keep the valve core 10 in the valve opening state, thereby reducing the electromagnetic force required to keep the valve core 10 in the valve opening state, effectively reducing power consumption, and if dry batteries are used for power supply, it is beneficial to extend the service life of the dry batteries.

[0080] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0081] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A solenoid valve, characterized in that: include: Valve body (50); Valve core (10); A valve opening assembly (20) comprises a valve opening coil (21), wherein the valve opening coil (21) drives the valve core (10) to enter a valve opening state when energized; A maintaining assembly (30) comprises a maintaining coil (31), a transmission member (32) and a lever (33), wherein the lever (33) comprises a rotating portion (331), a movable portion (332) and a connecting portion (333) which are movably connected to the valve body (50), the valve core (10) and the transmission member (32) in a one-to-one correspondence, and a distance between the rotating portion (331) and the connecting portion (333) is greater than a distance between the rotating portion (331) and the movable portion (332); An elastic member (40) is used to drive the valve core (10) to enter a valve closing state after the valve opening coil (21) and the maintaining coil (31) are both powered off; After the valve opening coil (21) is energized to drive the valve core (10) to enter the valve opening state, the maintaining coil (31) is energized, and the maintaining coil (31) provides a force to the lever (33) through the transmission member (32) to keep the valve core (10) in the valve opening state.

2. The solenoid valve according to claim 1, characterized in that: The resistance of the maintaining coil (31) is greater than the resistance of the valve opening coil (21); and / or, when the maintaining coil (31) is energized, the maintaining coil (31) and the valve opening coil (21) are energized in series.

3. The solenoid valve according to claim 1, characterized in that: The valve core (10) comprises a first fixed shaft (11), a first movable shaft (12) and a valve cap (13); one end of the first movable shaft (12) is detachably engaged with the first fixed shaft (11); the other end of the first movable shaft (12) is connected to the valve cap (13); and one end of the first movable shaft (12) close to the valve cap (13) is also movably connected to the movable part (332).

4. The solenoid valve according to claim 3, characterized in that: The elastic member (40) is located between the first movable shaft (12) and the first fixed shaft (11), and two ends of the elastic member (40) are elastically in contact with the first movable shaft (12) and the first fixed shaft (11), respectively.

5. The solenoid valve according to claim 1 or 3, characterized in that: The valve opening assembly (20) further comprises a first bracket (22), wherein the first bracket (22) is provided with a first cavity for accommodating the valve core (10), and the valve opening coil (21) is wound around the periphery of the first bracket (22).

6. The solenoid valve according to claim 1, characterized in that: The transmission member (32) comprises a second fixed shaft (34) and a second movable shaft (35), one end of the second movable shaft (35) is detachably matched with the second fixed shaft (34), and the other end of the second movable shaft (35) is movably connected to the connecting portion (333).

7. The solenoid valve according to claim 1 or 6, characterized in that: The maintaining assembly (30) further comprises a second bracket (36), the second bracket (36) being provided with a second cavity for accommodating the transmission member (32), and the maintaining coil (31) being wound around the periphery of the second bracket (36).

8. The solenoid valve according to claim 1, characterized in that: The movable part (332) is located between the rotating part (331) and the connecting part (333); or, the rotating part (331) is located between the movable part (332) and the connecting part (333).

9. The solenoid valve according to claim 1, characterized in that: A valve cavity (51) is provided in the valve body (50), and a valve port (52) and a through port (53) connected to the valve cavity (51) are provided on the valve body (50). One end of the valve core (10) is located in the valve cavity (51), and the valve core (10) is used to block the valve port (52). The lever (33) is located in the valve cavity (51), and the rotating portion (331) is movably connected to the side wall of the valve cavity (51).

10. A gas appliance, characterized in that: Comprising a solenoid valve as claimed in any one of claims 1 to 9.

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