Gas proportional valve and stove

Abstract

The utility model relates to the field of kitchen utensils, and particularly discloses a gas proportional valve and a stove, the gas proportional valve comprises a valve body, and a valve core assembly, a leather film, an elastic piece and an electromagnet which are arranged in the valve body; a valve seat is arranged in the valve body, and the first end of the valve element assembly is connected to the electromagnet. The valve element assembly is connected to the center portion of the leather film at a first connection position, the outer peripheral portion of the leather film is connected to a second connection position on the valve body, and in the axial direction of the valve element assembly, the first connection position is closer to the valve seat than the second connection position, so that the leather film is formed into a boss shape. Compared with an existing gas proportional valve, the first connecting position where the valve element assembly of the gas proportional valve is connected with the leather membrane moves towards the valve seat, so that the leather membrane is in a boss shape, and the valve element assembly is not prone to moving in the radial direction due to the tensile force formed after the leather membrane is tensioned.

Description

Technical Field

[0001] This utility model relates to the field of kitchen utensils, and in particular to a gas proportional valve and a stove. Background Technology

[0002] In existing proportional valves, the valve core moves up and down, creating an annular gap between the valve core and the valve body, allowing gas to flow through. The valve core tends to move downwards to close the valve due to gravity and the pressure of the upper spring; it is also lifted upwards by the electromagnetic force generated by the energized coil below, opening the valve. The gas flow rate depends on the magnitude of the coil current, i.e., the amount of upward displacement of the coil.

[0003] 1. The valve core shaft extends into the thin cylinder of the lower coil frame, which is a loose connection. Therefore, in addition to the freedom of vertical movement, the valve core also has the freedom of radial displacement and a small range of rotation, and the position offset range of the valve core head is even larger.

[0004] 2. Within a relatively small displacement range, the valve core has a high degree of freedom. Therefore, when the valve core moves upward (valve opens), the gas flows through the valve. Since the gas enters the valve cavity only from the right side, the turbulence is strong, generating periodic eddies and other secondary flows within the valve channel. These secondary flows act on the valve core, subjecting it to periodic pulsating forces. Under certain specific operating conditions, when the pneumatic frequency is close to the valve system frequency, the valve core experiences axial and radial vibrations within the valve body, known as aerodynamic vibration. This aerodynamic vibration affects the stability of the gas flow, and the resulting vibration noise radiates to the user, reducing the product's sound quality and impacting the user experience. Utility Model Content

[0005] The technical problem to be solved by this utility model is to eliminate the gas vibration phenomenon that occurs in a gas proportional valve under specific working conditions, and to provide a gas proportional valve and a stove.

[0006] The present invention solves the above-mentioned technical problems through the following technical solution:

[0007] A gas proportional valve includes: a valve body and a valve core assembly, a diaphragm, an elastic element and an electromagnet disposed within the valve body;

[0008] A valve seat is provided in the valve body, a first end of the valve core assembly is connected to the electromagnet, a second end of the valve core assembly abuts against the valve seat to close the fluid passage in the valve body, and the elastic member biases the valve core in the direction that causes the second end of the valve core assembly to abut against the valve seat.

[0009] The valve core assembly is connected to the center of the diaphragm at a first connection position, and the outer periphery of the diaphragm is connected to a second connection position on the valve body. In the axial direction of the valve core assembly, the first connection position is closer to the valve seat than the second connection position, so that the diaphragm is formed into a boss shape.

[0010] In this solution, the first connection position of the valve core assembly and the diaphragm of the gas proportional valve is moved towards the valve seat compared to the existing gas proportional valve, so that the diaphragm is formed into a boss shape. The tension formed after the diaphragm is tightened makes the valve core assembly less prone to radial movement.

[0011] Preferably, the gas proportional valve satisfies the following conditions:

[0012] l / L≥0.4;

[0013] Where l is the distance from the first connection position to the first end of the valve core assembly, and L is the total length of the valve core assembly.

[0014] In this scheme, the gas proportional valve meets the above conditions, which allows the connection position between the valve core assembly and the diaphragm to move toward the valve seat. That is, the point of force application of the diaphragm to the valve core assembly moves toward the valve seat, making the second end of the valve core assembly less prone to radial movement.

[0015] Preferably, the gas proportional valve satisfies the following condition: 0.5 ≤ l / L ≤ 0.6.

[0016] In this solution, the gas proportional valve meets the above conditions, satisfying both the design requirements of the valve core assembly and allowing the diaphragm to apply force to the valve core assembly towards the valve seat.

[0017] Preferably, the center of mass of the valve core assembly is closer to the valve seat than the first connection position, wherein, in the axial direction of the valve core assembly, the distance h between the center of mass of the valve core assembly and the first connection position is ≥0.08L, where L is the total length of the valve core assembly.

[0018] In this design, the center of mass is positioned relatively high relative to the overall valve core assembly. This increases the local mass at the second end of the valve core assembly, requiring stronger aerodynamic thrust to prevent vibrations at that end and thus enhancing the assembly's stability. Furthermore, the increased local mass at the second end lowers the local system resonance frequency, helping the valve core system avoid resonance points caused by gas turbulence.

[0019] Preferably, the valve core assembly includes: a valve core and a mandrel connected to each other; a first end of the valve core assembly is located on the mandrel, a second end of the valve core assembly is located on the valve core, and the first connection position is located at the connection point of the valve core and the mandrel.

[0020] Preferably, the valve core assembly further includes a fixing plate;

[0021] The valve core and the fixing plate clamp the diaphragm from both sides, and the mandrel passes through the fixing plate, the diaphragm and the valve core in sequence.

[0022] Preferably, the valve core assembly further includes a counterweight, the valve core is hollow inside, the counterweight is disposed inside the valve core, and the spindle is connected to the counterweight.

[0023] Preferably, the first end of the valve core assembly is fixed to the electromagnet.

[0024] Preferably, the electromagnet includes a coil frame and a magnet, and the first end of the valve core assembly is fixed inside the sleeve of the coil frame.

[0025] A cooktop that includes a gas proportional valve as described above.

[0026] The positive and progressive effects of this utility model are as follows: compared with the existing gas proportional valve, the first connection position of the valve core assembly and the diaphragm of this gas proportional valve is moved towards the valve seat, so that the diaphragm is formed into a boss shape, and the tension formed after the diaphragm is tightened makes the valve core assembly less prone to radial movement. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural diagram of a gas proportional valve according to an embodiment of the present invention.

[0028] Figure 2 This is a cross-sectional structural diagram of a gas proportional valve according to an embodiment of the present invention.

[0029] Figure 3 for Figure 2 A magnified structural diagram of the Q part.

[0030] Figure 4 This is a three-dimensional structural diagram of a valve core according to an embodiment of the present invention.

[0031] Figure 5 This is a three-dimensional structural diagram of a fixing piece according to an embodiment of the present invention.

[0032] Figure 6 This is a three-dimensional structural diagram of a membrane according to an embodiment of the present invention.

[0033] Explanation of reference numerals in the attached drawings: Gas proportional valve 100; Valve body 110; Valve seat 111; Valve core assembly 120; First end 121; Second end 122; Valve core 124; Spindle 125; Fixing plate 126; Counterweight 127; Diaphragm 130; Elastic element 140; Electromagnet 150; Coil frame 151; Sleeve 1511; Magnet 152. Detailed Implementation

[0034] The present invention will be further described below with reference to the accompanying drawings and by way of embodiments, but the present invention is not limited to the scope of the embodiments thereon.

[0035] like Figures 1-6 As shown, this embodiment provides a gas proportional valve 100, which includes: a valve body 110 and a valve core assembly 120, a diaphragm 130, an elastic element 140 and an electromagnet 150 disposed within the valve body 110.

[0036] A valve seat 111 is provided inside the valve body 110. The first end 121 of the valve core assembly 120 is connected to the electromagnet 150. The second end 122 of the valve core assembly 120 abuts against the valve seat 111 to close the fluid passage inside the valve body 110. The elastic member 140 biases the valve core 124 in the direction that causes the second end 122 of the valve core assembly 120 to abut against the valve seat 111.

[0037] The valve core assembly 120 is connected to the center of the diaphragm 130 at the first connection position A, and the outer periphery of the diaphragm 130 is connected to the second connection position B on the valve body 110. In the axial direction X of the valve core assembly 120, the first connection position A is closer to the valve seat 111 than the second connection position B, so that the diaphragm 130 is formed into a boss shape.

[0038] Compared to the existing gas proportional valve 100, the first connection position A where the valve core assembly 120 of the gas proportional valve 100 connects to the diaphragm 130 moves toward the valve seat 111, thereby making the diaphragm 130 form a boss shape. The tension formed after the diaphragm 130 is tensioned makes the valve core assembly 120 less prone to radial movement.

[0039] In this embodiment, the outer periphery of the diaphragm 130 is fixed to the valve body 110 by being pressed together. Of course, those skilled in the art can also use other connection methods to fix the diaphragm 130.

[0040] Preferably, the gas proportional valve 100 meets the following conditions:

[0041] l / L≥0.4;

[0042] Where l is the distance from the first connection position to the endpoint of the first end 121 of the valve core assembly 120, and L is the total length of the valve core assembly 120.

[0043] The gas proportional valve 100 satisfies the above conditions, which allows the connection position between the valve core assembly 120 and the diaphragm 130 to move toward the valve seat 111. That is, the point of force application of the diaphragm 130 on the valve core assembly 120 moves toward the valve seat 111, making the second end 122 of the valve core assembly 120 less prone to radial movement.

[0044] More preferably, the gas proportional valve 100 satisfies the following condition: 0.5≤l / L≤0.6.

[0045] The gas proportional valve 100 meets the above conditions, which can satisfy the design requirements of the valve core assembly 120 and move the force point of the diaphragm 130 on the valve core assembly 120 toward the valve seat 111.

[0046] The center of mass M of the valve core assembly 120 is closer to the valve seat 111 than the first connection position. In the axial direction of the valve core assembly 120, the distance h between the center of mass M of the valve core assembly 120 and the first connection position is ≥0.08L.

[0047] The center of mass M is in relative position to the valve core assembly 120. Figure 3 The higher position of the valve core assembly 120, closer to the valve seat 111, results in an increased local mass at the second end 122. This increases the aerodynamic thrust required to control the vibration of the second end 122, thus enhancing the stability of the valve core assembly 120. Furthermore, the increased local mass at the second end 122 lowers the local system resonance frequency, helping the valve core 124 system avoid resonance points caused by gas turbulence.

[0048] The valve core assembly 120 includes a valve core 124 and a spindle 125 connected to each other; a first end 121 of the valve core assembly 120 is located on the spindle 125, a second end 122 of the valve core assembly 120 is located on the valve core 124, and a first connection position is located at the connection point of the valve core 124 and the spindle 125.

[0049] The valve core 124 has a trumpet-shaped structure and converges towards the diaphragm 130. In this embodiment, the elastic element 140 is a spring and is disposed inside the trumpet-shaped structure. In other embodiments, the elastic element 140 may also be other existing components capable of achieving the biasing function.

[0050] The valve core assembly 120 also includes a fixing plate 126; the valve core 124 and the fixing plate 126 clamp the diaphragm 130 from both sides, and the spindle 125 passes through the fixing plate 126, the diaphragm 130 and the valve core 124 in sequence. The center of the diaphragm 130, the center of the fixing plate 126 and the center of the valve core 124 are all provided with through holes for the spindle 125 to pass through.

[0051] The valve core assembly 120 also includes a counterweight 127. The valve core 124 is hollow inside, and the counterweight 127 is located inside the valve core 124. The spindle 125 is connected to the counterweight 127.

[0052] The counterweight 127 set inside the valve core 124 can further move the position of the center of mass M of the valve core assembly 120 upward, that is, the center of mass M moves towards the second end 122, so that the vibration of the second end 122 of the valve core assembly 120 requires stronger pneumatic thrust, which further enhances the stability of the valve core assembly 120.

[0053] The end of the spindle 125 is assembled and connected to the mounting block, and then clamped from the other side of the diaphragm 130 by the fixing plate 126, so that the diaphragm 130 can be fixed between the valve core 124, or the counterweight 127 and the fixing plate 126.

[0054] The first end 121 of the valve core assembly 120 is connected to the electromagnet 150. The electromagnet 150 includes a coil frame 151 and a magnet 152, and the first end 121 of the valve core assembly 120 is inserted into the sleeve 1511 of the coil frame 151.

[0055] The spindle 125 extends into the sleeve 1511 of the coil frame 151. The shaft hole fit clearance is 0.1mm≤Δ≤0.2mm on one side, and the axial fit depth d≥5mm. The spindle 125 is connected to the coil frame 151 at the third connection position C.

[0056] Alternatively, the first end 121 of the valve core assembly 120, i.e. the spindle 125, is fixedly connected to the coil frame 151. The connection method can be threaded connection, welding, etc., so that the spindle 125 cannot wobble relative to the coil frame 151.

[0057] For the slender rod-shaped valve core assembly 120, fixing any two points axially restricts the radial degree of freedom of the valve core assembly 120. In the prior art, point C is generally loosely connected, while the valve core assembly 120 as a whole has two fixed positions, A and C. Theoretically, the radial displacement of the valve core 124 is limited.

[0058] Because the diaphragm 130 is made of a soft material, the fixing ability at point A is relatively poor, meaning that point A can still vibrate radially. However, in actual use of the gas proportional valve 100, the gas pressure inside the valve is 2000-4000 Pa, and the diaphragm 130 is in a taut state, thus greatly improving the fixing ability at point A. Therefore, the fixing of points A and C can still be considered as limiting the radial vibration of the valve core 124.

[0059] Compared with existing technologies, the "U"-shaped (protrusion shape) diaphragm 130 essentially raises the height of point A on the diaphragm 130. The distance between points A and C is significantly increased, thus greatly enhancing the ability of these two points to restrict the overall radial displacement of the valve core assembly 120.

[0060] Since the center of mass M is positioned relatively high relative to the valve core assembly 120 as a whole, the local mass of the second end 122 of the valve core assembly 120 increases. This increases the aerodynamic thrust required to prevent vibrations at the second end 122, thus enhancing the stability of the valve core assembly 120. Furthermore, the increased local mass at the second end 122 of the valve core assembly 120 lowers the local system resonance frequency, which helps the valve core 124 system avoid resonance points caused by gas turbulence.

[0061] This embodiment also provides a stove, which includes the gas proportional valve 100 as described above.

[0062] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0063] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. A gas proportional valve characterized by, It comprises: a valve body and a valve core assembly, a diaphragm, a spring and an electromagnet arranged in the valve body; a valve seat is arranged in the valve body, a first end of the valve core assembly is connected to the electromagnet, a second end of the valve core assembly abuts against the valve seat to close a fluid passage in the valve body, the spring biases the valve core in a direction that makes the second end of the valve core abut against the valve seat; the valve core assembly is connected to a central part of the diaphragm at a first connection position, an outer peripheral part of the diaphragm is connected to a second connection position on the valve body, wherein, in the axial direction of the valve core assembly, the first connection position is closer to the valve seat than the second connection position, so that the diaphragm is formed in a boss shape.

2. The gas proportional valve according to claim 1, wherein the gas proportional valve satisfies the following condition: l / L≥0.4； wherein l is the distance from the first connection position to the end point of the first end of the valve core assembly, and L is the total length of the valve core assembly.

3. The gas proportional valve according to claim 2, wherein the gas proportional valve satisfies the following condition: 0.5≤l / L≤0.

6.

4. The gas proportional valve according to claim 1, wherein a center of mass of the valve core assembly is closer to the valve seat than the first connection position, wherein, in the axial direction of the valve core assembly, the distance h between the center of mass of the valve core assembly and the first connection position is ≥0.08L, wherein L is the total length of the valve core assembly.

5. The gas proportional valve as claimed in claim 1, characterized in that the valve core assembly comprises a valve core and a core shaft connected to each other, the first end of the valve core assembly is located at the core shaft, the second end of the valve core assembly is located at the valve core, and the first connection position is located at the connection point of the valve core and the core shaft.

6. Gas proportional valve according to claim 5, characterized in that the valve core assembly further comprises a fixing sheet; the valve core and the fixing sheet respectively sandwich the diaphragm from both sides of the diaphragm, and the core shaft passes through the fixing sheet, the diaphragm and the valve core in sequence.

7. Gas proportional valve according to claim 6, characterized in that the valve core assembly further comprises a counterweight, the valve core is hollow inside, the counterweight is arranged in the inside of the valve core, and the core shaft is connected to the counterweight.

8. The gas proportional valve as claimed in claim 1, characterized in that the first end of the valve core assembly is fixed to the electromagnet.

9. Gas proportional valve according to claim 8, characterized in that the electromagnet comprises a coil holder and a magnet, and the first end of the valve core assembly is fixed in the sleeve of the coil holder.

10. A hob, characterized in that It comprises the gas proportional valve according to any one of claims 1-9.

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