Gas proportional valve and stove

Abstract

The utility model relates to the field of kitchen utensils, in particular to a fuel gas proportional valve and a stove, and the fuel gas proportional valve comprises a valve body, a valve core, a leather film and an elastic piece, and the valve core, the leather film and the elastic piece are arranged in the valve body. A valve seat is arranged in the valve body, the first end of the valve element is connected to the leather film, the abutting portion of the second end of the valve element abuts against the valve seat so as to close a fluid channel in the valve body, and the elastic piece biases the valve element in the direction that the second end of the valve element abuts against the valve seat; an annular part is arranged on the side, away from the leather film, of the valve element relative to the abutting part, and a damping hole is formed in the annular part. The second end of the valve element of the gas proportional valve is provided with the damping hole, so that gas separation vortex of a valve port is destroyed, local pressure is balanced, radial vibration of the valve element is eliminated, and gas vibration of the proportional valve is avoided.

Description

TECHNICAL FIELD

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

[0002] The valve core of the existing proportional valve moves up and down to form an annular gap between the valve core and the valve body for gas flow. The valve core has a tendency to move downward to close the valve by gravity, spring pressure above, etc. The valve core is lifted upward to open the valve by the electromagnetic force generated by the energization of the coil below. The size of the gas flow depends on the size of the coil current, that is, the amount of upward displacement of the coil.

[0003] The existing proportional valve has the following defects:

[0004] 1. The valve core shaft extends into the lower coil holder thin cylinder, which is a loose connection. Therefore, the valve core has the freedom of radial displacement, small range rotation in addition to the freedom of up and down movement, and the position of the valve core head has a larger offset range.

[0005] 2. From a smaller displacement range, the valve core has a high degree of freedom. Therefore, when the valve core moves upward (the valve is opened), the gas flows through the valve. Due to the small flow area of the valve, the gas flow rate is high, and the turbulent flow is strong, and the pressure pulsation is strong. In addition, there is a step separation flow behind the valve core head, and the separation vortex acts on the valve core head, so that the valve core is subjected to periodic pulsating force. Under certain specific working conditions, when the pneumatic frequency is close to the valve system frequency, the valve core produces radial displacement vibration in the valve body, that is, the gas vibration phenomenon. The occurrence of gas vibration affects the stability of gas flow, and the vibration noise produced radiates to the user, reduces the sound quality of the product, and affects the use experience. CONTENT OF THE UTILITY MODEL

[0006] The technical problem to be solved by the utility model is to eliminate the gas vibration phenomenon of the gas proportional valve under specific working conditions, and to provide a gas proportional valve and a gas stove.

[0007] The utility model solves the above technical problems by the following technical scheme:

[0008] A gas proportional valve comprises a valve body, a valve core, a diaphragm and an elastic member arranged in the valve body.

[0009] The valve body is provided with a valve seat, the first end of the valve core is connected to the diaphragm, the abutting portion of the second end of the valve core 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 the second end of the valve core abuts against the valve seat.

[0010] The side of the valve core away from the diaphragm relative to the abutting portion is provided with an annular portion, and the annular portion is provided with a vibration damping hole.

[0011] In the present scheme, the second end of the valve core of the gas proportional valve is provided with a vibration elimination hole, which destroys the gas separation vortex of the valve port, balances the local pressure, thereby eliminating the radial vibration of the valve core and avoiding the occurrence of gas vibration of the proportional valve.

[0012] Preferably, the second end of the valve core is further provided with a plurality of elongated holes extending along the circumference of the annular portion, and the plurality of elongated holes are arranged between the vibration elimination hole and the abutting portion.

[0013] In the present scheme, the second end of the valve core of the gas proportional valve is provided with a vibration elimination hole, which destroys the gas separation vortex of the valve port, balances the local pressure, thereby eliminating the radial vibration of the valve core and avoiding the occurrence of gas vibration of the proportional valve.

[0014] Preferably, the plurality of vibration elimination holes and the plurality of elongated holes are uniformly arranged along the circumference of the annular portion.

[0015] Preferably, the vibration elimination hole is an oblong circle extending along the axial direction of the valve core.

[0016] Preferably, the gas proportional valve further comprises an electromagnet connected to the first end of the valve core and arranged on one side of the diaphragm, and the valve seat is arranged on the other side of the diaphragm.

[0017] Preferably, the valve body is further provided with an air inlet and an air outlet, the air inlet is communicated between the diaphragm and the valve seat, and the air outlet is communicated on the side of the valve seat away from the diaphragm.

[0018] Preferably, the second end of the valve core comprises a horn structure, the abutting portion is located at one end of the horn structure away from the diaphragm, the annular portion is connected to one end of the horn structure away from the diaphragm, and the elongated holes are arranged on the horn structure.

[0019] Preferably, the elastic member is a spring and is arranged inside the horn structure.

[0020] Preferably, the electromagnet comprises a coil holder and a magnet, the coil holder is provided with a sleeve, the first end of the valve core is connected to a valve core shaft, and the valve core shaft is inserted into the sleeve.

[0021] A stove, characterized in that it comprises the gas proportional valve as described above.

[0022] The positive progress effect of the present utility model lies in that the second end of the valve core of the gas proportional valve is provided with a vibration elimination hole, which destroys the gas separation vortex of the valve port, balances the local pressure, thereby eliminating the radial vibration of the valve core and avoiding the occurrence of gas vibration of the proportional valve. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1This is a three-dimensional structural diagram of a gas proportional valve according to an embodiment of the present invention.

[0024] Figure 2 This is a cross-sectional structural diagram of a gas proportional valve according to an embodiment of the present invention.

[0025] Figure 3 This is a three-dimensional structural diagram of a valve core according to an embodiment of the present invention.

[0026] Figure 4 This is a schematic cross-sectional view of a valve core according to an embodiment of the present invention.

[0027] Explanation of reference numerals in the attached drawings: Gas proportional valve 100; Valve body 110; Valve seat 111; Inlet 112; Outlet 113; Valve core 120; First end 121; Second end 122; Horn-shaped structure 1221; Annular part 1222; Vibration damping hole 1225; Slender hole 1226; Valve core shaft 130; Diaphragm 140; Elastic element 150; Electromagnet 160; Frame 161; Magnet 162. Detailed Implementation

[0028] 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.

[0029] like Figures 1-4 As shown, this embodiment provides a gas proportional valve 100, which includes a valve body 110 and a valve core 120, a diaphragm 140, and an elastic element 150 disposed within the valve body 110.

[0030] A valve seat 111 is provided inside the valve body 110. The first end 121 of the valve core 120 is connected to the diaphragm 140. The abutting part of the second end 122 of the valve core 120 abuts against the valve seat 111 to close the fluid passage inside the valve body 110. The elastic member 150 biases the valve core 120 in the direction that causes the second end 122 of the valve core 120 to abut against the valve seat 111.

[0031] The valve core 120 has an annular portion 1222 on the side of the valve core 120 that is away from the diaphragm 140 relative to the contact portion, and the annular portion 1222 has vibration damping holes 1225.

[0032] The second end 122 of the valve core 120 of the gas proportional valve 100 is provided with a vibration damping hole 1225, which disrupts the gas separation vortex at the valve port, balances the local pressure, thereby eliminating the radial vibration of the valve core 120 and preventing the occurrence of gas vibration in the proportional valve.

[0033] The second end 122 of the valve core 120 is also provided with a plurality of elongated holes 1226 extending circumferentially along the annular portion 1222, and the plurality of elongated holes 1226 are located between the vibration damping hole 1225 and the abutment portion.

[0034] The valve core 120 is provided with a plurality of damping holes 1225 and a plurality of elongated holes 1226, which are evenly arranged along the circumference of the annular portion 1222.

[0035] The valve core 120 is provided with a plurality of damping holes 1225 and a plurality of elongated holes 1226, which are evenly arranged along the circumference of the annular portion 1222.

[0036] The damping holes 1225 are long circular holes extending along the axial direction of the valve core 120. Of course, the damping holes 1225 can also adopt other shapes that can eliminate or reduce the gas vibration.

[0037] The gas proportional valve 100 further comprises an electromagnet 160 connected to the first end 121 of the valve core 120 and arranged on one side of the diaphragm 140, and the valve seat 111 is arranged on the other side of the diaphragm 140.

[0038] The valve body 110 is further provided with an inlet port 112 and an outlet port 113. The inlet port 112 is communicated between the diaphragm 140 and the valve seat 111, and the outlet port 113 is communicated on the side of the valve seat 111 away from the diaphragm 140.

[0039] The second end 122 of the valve core 120 comprises a horn-shaped structure 1221, an abutting portion is located at one end of the horn-shaped structure 1221 away from the diaphragm 140, an annular portion 1222 is connected to one end of the horn-shaped structure 1221 away from the diaphragm 140, and the elongated holes 1226 are arranged on the horn-shaped structure 1221.

[0040] The annular portion 1222 is evenly provided with damping holes 1225 along the circumference, the opening rate is ≥25%, the opening width w is ≥2mm, and the opening height H is ≥ the opening width w. The height L of the annular portion 1222 is ≥5mm. The pore height h of the elongated holes 1226 is ≤1mm, the pore included angle θ is ≥30°, and the pore position distance from the vertical height of the valve port is 0.7mm≤d≤2mm.

[0041] The elastic member 150 is a spring and is arranged inside the horn-shaped structure 1221.

[0042] The electromagnet 160 comprises a coil holder 161 and a magnet 162. The coil holder 161 is provided with a sleeve, the first end 121 of the valve core 120 is connected to the valve core shaft 130, and the valve core shaft 130 is inserted into the sleeve. The magnet 162 here refers to a soft magnet 162. The electromagnet has been widely used in the prior art and will not be described here.

[0043] As shown in Figure 2 The inside of the valve core 120 is hollow, and the valve core shaft 130 is mounted at the first end 121 of the valve core 120 through the bolt inside the valve core 120. The valve core shaft 130 is inserted into the sleeve in a loose connection.

[0044] The second end 122 of the valve core 120 closes the gas passage in the valve body 110 by abutting against the valve seat 111, that is, makes the gas proportional valve 100 close, and the second end 122 of the valve core 120 moves upward under the driving of the electromagnet 160 to be separated from the valve seat 111, so that the gas passage in the valve body 110 is opened. Since the second end 122 of the valve core 120 is a horn structure 1221 and converges toward the diaphragm 140, the more the valve core 120 moves upward, the greater the gap between the valve seat 111 and the second end 122 of the valve core 120, and thus the opening of the gas passage in the valve body 110. The flow of the gas passing through the gas proportional valve 100 can be controlled by driving the electromagnet in the gas proportional valve 100. Figure 2

[0045] The gas proportional valve 100 is composed of the valve body 110, the valve core 120, the diaphragm 140, etc., as shown in FIG. 1. Figure 2 The pressure of the gas at the user side is about 2000-4000 Pa, and the high-pressure gas enters the valve cavity from the right side pipeline. The coil is electrified to generate repulsive force with the magnet 162, the coil moves upward, pushes the valve core shaft 130 and drives the valve core 120 to move upward, the valve is opened, and the gas passes through the annular gap between the valve core 120 and the valve body 110 and flows to the rear end of the valve.

[0046] After the gas flows through the valve port (between the abutting portion and the valve seat 111), a step separation vortex is generated at the rear side of the valve core 120. The aerodynamic force generated by the vortex makes the valve core 120 produce radial displacement, so that the valve gas vibration phenomenon occurs.

[0047] The annular part 1222 of the second end 122 of the valve core 120 is designed with a vibration damping hole 1225, which destroys the vortex structure and suppresses the formation of the separation vortex;

[0048] An elongated hole 1226 is provided near the valve port of the valve core 120, which balances the local pressure difference between the valve port and the inside of the head (the second end 122) of the valve core 120 and eliminates the aerodynamic thrust on the valve core 120 caused by pressure fluctuation;

[0049] The structure design of the valve head greatly weakens the secondary flow aerodynamic force on the valve core 120 and eliminates the gas proportional valve 100 gas vibration phenomenon caused by the radial vibration of the valve core 120.

[0050] The embodiment also provides a stove comprising the gas proportional valve 100 as above.

[0051] ​In the description of the utility model, need understanding is, the term "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and so on indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawing, just is for the convenience of describing the utility model and simplifying the description, and is not indicate or imply the device or element indicated must have a particular orientation, construct and operate with a particular orientation, therefore can not be understood as the restriction of the utility model.

[0052] Although the specific embodiments of the utility model are described above, those skilled in the art should understand that this is only illustrative, the protection scope of the 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 the utility model, but these changes and modifications all fall within the protection scope of the utility model.

Claims

1. A gas proportional valve comprising: The valve body and the valve core, the diaphragm and the elastic member arranged in the valve body; The valve body is provided with a valve seat, the first end of the valve core is connected to the diaphragm, the abutting portion of the second end of the valve core 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 the second end of the valve core abuts against the valve seat; The valve core is provided with an annular portion on the side away from the diaphragm relative to the abutting portion, and the annular portion is provided with vibration damping holes.

2. Gas proportional valve according to claim 1, characterized in that The second end of the valve core is further provided with a plurality of elongated holes extending along the circumference of the annular portion, and the plurality of elongated holes are arranged between the vibration damping holes and the abutting portion.

3. Gas proportional valve according to claim 2, characterized in that The plurality of vibration damping holes and the plurality of elongated holes are uniformly arranged along the circumference of the annular portion.

4. The gas proportional valve as claimed in claim 2, characterized in that The vibration damping holes are long circular holes extending along the axial direction of the valve core.

5. The gas proportional valve as claimed in claim 1, characterized in that The gas proportional valve further comprises an electromagnet connected to the first end of the valve core and arranged on one side of the diaphragm, and the valve seat is arranged on the other side of the diaphragm.

6. The gas proportional valve as claimed in claim 1, characterized in that The valve body is further provided with an air inlet and an air outlet, the air inlet is communicated between the diaphragm and the valve seat, and the air outlet is communicated on the side of the valve seat away from the diaphragm.

7. The gas proportional valve as claimed in claim 2, characterized in that The second end of the valve core comprises a horn structure, the abutting portion is located at one end of the horn structure away from the diaphragm, the annular portion is connected to one end of the horn structure away from the diaphragm, and the elongated holes are arranged on the horn structure.

8. Gas proportional valve according to claim 7, characterized in that The elastic member is a spring and is arranged inside the horn structure.

9. The gas proportional valve as claimed in claim 5, characterized in that The electromagnet comprises a coil holder and a magnet, the coil holder is provided with a sleeve, the first end of the valve core is connected to a valve core shaft, and the valve core shaft is inserted into the sleeve.

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

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