Gas proportional valve and stove comprising same

Abstract

The utility model relates to the field of kitchen utensils, and particularly discloses a gas proportional valve and a stove comprising the same, the gas proportional valve comprises a valve body, and a valve core, a leather film and an elastic piece which 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 second end of the valve element is used for abutting against the valve seat, and the elastic piece biases the valve element in the direction that the second end of the valve element abuts against the valve seat. A plurality of first protrusions arranged in the circumferential direction of the valve element are arranged on the outer surface of the valve element, due to the arrangement of the first protrusions, when fuel gas flows through the valve element, original periodic vortex pulse force is eliminated by the first protrusions, a resonance excitation source of the fuel gas proportional valve is eliminated, and the possibility that the valve element generates gas vibration is avoided; namely, the gas vibration phenomenon of the gas proportional valve under the specific working condition is eliminated.

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] Existing gas proportional valves have the following disadvantages:

[0004] 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.

[0005] 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

[0006] 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.

[0007] The present invention solves the above-mentioned technical problems through the following technical solution:

[0008] A gas proportional valve includes: a valve body and a valve core, a diaphragm, and an elastic element disposed within the valve body;

[0009] A valve seat is provided inside the valve body. The first end of the valve core is connected to the diaphragm, and the second end of the valve core is used to abut against the valve seat. The elastic element biases the valve core in the direction that makes the second end of the valve core abut against the valve seat.

[0010] The outer surface of the valve core is provided with a plurality of first protrusions arranged along the circumference of the valve core.

[0011] In this design, the first protrusion eliminates the periodic vortex pulsation force when the gas flows through the valve core. The elimination of the resonant excitation source of the gas proportional valve avoids the possibility of gas vibration in the valve core, thus eliminating the gas vibration phenomenon that occurs in the gas proportional valve under specific operating conditions.

[0012] Preferably, a first chamber is formed inside the valve body between the valve seat and the diaphragm, and the valve core is disposed in the first chamber. A plurality of second protrusions are arranged circumferentially around the valve core on the inner wall surface of the first chamber surrounding the valve core.

[0013] In this design, the first chamber is used to accommodate the valve core; the second protrusion allows the gas to enter the first chamber, and when it comes into contact with the inner wall of the first chamber, the periodic eddy current pulsation is eliminated by the second protrusion, thus avoiding the possibility of gas vibration in the valve body.

[0014] Preferably, the valve core includes an abutment portion and a vibration damping portion. The abutment portion is located at the second end of the valve core, and the vibration damping portion is located at the first end of the valve core. The first protrusion is strip-shaped and extends along the axial direction of the valve core.

[0015] In this design, the abutting part is used to abut against the valve seat, and the vibration damping part is provided with a first protrusion to eliminate the vibration of the valve core; the first protrusion is strip-shaped and extends along the axial direction of the valve core and along the entire axial length of the vibration damping part. This arrangement increases the area of ​​the first protrusion, thereby improving the efficiency of eliminating the vortex pulsation force of the gas.

[0016] Preferably, the vibration damping part includes a first column and a second column, the first column is located between the abutting part and the second column, and the radial cross-sectional diameter of the first column is larger than the radial cross-sectional diameter of the second column; the first protrusion includes a first column protrusion and a second column protrusion;

[0017] The first column protrusion is disposed on the side surface of the first column, and the second column protrusion is disposed on the side surface of the second column; the height of the first column protrusion protruding from the first column is [missing information]. The width of the first column protrusion along the circumference of the valve core is... The radius of the first column is ;

[0018] The height by which the second column protrudes beyond the first column is [missing information]. The width of the second column protrusion along the circumference of the valve core is... The radius of the second prism is ;

[0019] in, Greater than ; 0.1 ≤ ≤0.3 0.35 ≤ ≤0.65 0.17 ≤ ≤0.35 0.25 ≤ ≤0.5 .

[0020] In this design, the radial cross-sectional diameter of the first column is larger than that of the second column to reduce the space occupied by the valve core in the first cavity, thereby increasing the amount of gas that the first cavity can hold. In addition, the relevant parameters of the first column, the second column, the first column protrusion, and the second column protrusion are beneficial to the performance of the first protrusion in eliminating periodic eddy current pulsation.

[0021] Preferably, the second protrusion is strip-shaped and extends along the axial direction of the valve core.

[0022] In this solution, the arrangement of the second protrusion increases the area of ​​the first protrusion, thereby improving the efficiency of eliminating the vortex pulsation of the gas.

[0023] Preferably, the height of the second protrusion protruding from the inner wall of the first chamber is [missing information]. The width of the second protrusion along the circumference of the valve body is... The radius of the port of the first chamber near the valve seat is... The radius of the port of the first chamber near the membrane is ;

[0024] in, =( + ) / 2, 0.3 ≤ ≤0.55 0.2 ≤ ≤0.38 .

[0025] In this scheme, the design of the relevant parameters of the second protrusion and the first chamber is beneficial to the performance of the first protrusion in eliminating periodic eddy current pulsation.

[0026] Preferably, the cross-section of the first protrusion is semi-circular, and / or the cross-section of the second protrusion is triangular.

[0027] In this design, the first protrusion has a semi-circular cross-section, which helps to reduce the friction between the gas flow and the valve core and reduces the possibility of the valve core generating air vibration. The second protrusion has a triangular cross-section. The above configuration provides strong stability and makes it less likely for the valve body to vibrate.

[0028] Preferably, the gas proportional valve further includes an electromagnet, which is connected to the first end of the valve core and disposed on one side of the diaphragm, while the valve seat is disposed on the other side of the diaphragm.

[0029] And / or,

[0030] The valve body is also provided with an air inlet and an air outlet. The air inlet is connected to the first chamber, and the air inlet faces the valve core and the direction of the air inlet is perpendicular to the axis of the valve core. The air outlet is connected to the side of the valve seat away from the diaphragm.

[0031] In this design, the above-mentioned air inlet configuration helps the first and second protrusions eliminate the periodic vortex pulsation force generated by the combustion gas.

[0032] Preferably, the contact portion has a trumpet-shaped structure and converges towards the membrane;

[0033] The elastic element is a spring and is located inside the trumpet-shaped structure.

[0034] A cooktop that includes the gas proportional valve as described above.

[0035] The positive and progressive effects of this utility model are as follows: the setting of the first protrusion eliminates the original periodic vortex pulsation force when the gas flows through the valve core. The elimination of the resonant excitation source of the gas proportional valve avoids the possibility of gas vibration in the valve core, that is, it eliminates the gas vibration phenomenon that occurs in the gas proportional valve under specific operating conditions. Attached Figure Description

[0036] Figure 1 This is a three-dimensional structural diagram of a gas proportional valve according to an embodiment of the present invention.

[0037] Figure 2 This is a cross-sectional structural diagram of a gas proportional valve according to an embodiment of the present invention.

[0038] Figure 3 This is a three-dimensional structural diagram of a valve core according to an embodiment of the present invention.

[0039] Figure 4 This is a three-dimensional structural schematic diagram of a valve core according to an embodiment of the present invention.

[0040] Figure 5 This is a partially enlarged view of the first column protrusion according to an embodiment of the present invention.

[0041] Figure 6 This is a partially enlarged view of the second column protrusion according to an embodiment of the present invention.

[0042] Figure 7 This is a schematic diagram of the internal structure of the first chamber according to an embodiment of the present invention.

[0043] Figure 8 This is a partially enlarged view of a second protrusion in a first chamber according to an embodiment of the present invention.

[0044] Explanation of reference numerals in the attached figures:

[0045] Gas proportional valve 100

[0046] Valve body 110

[0047] Valve seat 111

[0048] Air intake 112

[0049] Air outlet 113

[0050] Valve core 120

[0051] First end 121

[0052] Second end 122

[0053] First protrusion 123

[0054] The first column protrudes 1231

[0055] The second column protrudes 1232

[0056] Contact portion 124

[0057] Vibration isolation part 125

[0058] Valve spindle 126

[0059] First column 1251

[0060] Second column 1252

[0061] Skin film 130

[0062] Elastic element 140

[0063] First chamber 150

[0064] Second protrusion 151

[0065] Electromagnet 160

[0066] Coil holder 161

[0067] Magnet 162 Detailed Implementation

[0068] 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.

[0069] like Figure 1-8As shown, this embodiment provides a gas proportional valve 100, which includes: a valve body 110 and a valve core 120, a diaphragm 130, and an elastic element 140 disposed within the valve body 110; a valve seat 111 is disposed within the valve body 110; a first end 121 of the valve core 120 is connected to the diaphragm 130; a second end 122 of the valve core 120 is used to abut against the valve seat 111; and the elastic element 140 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; a plurality of first protrusions 123 are provided on the outer surface of the valve core 120 arranged circumferentially along the valve core 120.

[0070] In this embodiment, the first protrusion 123 is provided so that when the gas flows through the valve core 120, the original periodic eddy current pulsation force is eliminated by the first protrusion 123. The elimination of the resonance excitation source of the gas proportional valve 100 avoids the possibility of gas vibration in the valve core 120, that is, it eliminates the gas vibration phenomenon that occurs in the gas proportional valve 100 under specific operating conditions.

[0071] It should be noted that when the second end 122 of the valve core 120 does not abut against the valve seat 111, it will form an annular gap with the valve seat 111, so that the gas flows from the annular gap to the rear end of the gas proportional valve 100.

[0072] like Figure 2 As shown, a first chamber 150 is formed inside the valve body 110 between the valve seat 111 and the diaphragm 130. The valve core 120 is disposed in the first chamber 150. A plurality of second protrusions 151 arranged circumferentially around the valve core 120 are provided on the inner wall surface of the first chamber 150 surrounding the valve core 120.

[0073] In this embodiment, the first chamber 150 is used to accommodate the valve core 120; the second protrusion 151 is provided so that when the gas enters the first chamber 150 and comes into contact with the inner wall of the first chamber 150, the periodic eddy current pulsation force is eliminated by the second protrusion 151, thus avoiding the possibility of gas vibration in the valve body 110.

[0074] It should be noted that the second protrusion 151 and the first protrusion 123 are arranged opposite to each other, and the extension directions of the second protrusion 151 and the first protrusion 123 are roughly the same; in addition, after the gas enters the first chamber 150, the airflow impacts the lower part of the valve core 120 ( Figure 2 As shown, the gas flows around the wall surface. The inner wall surface of the first chamber 150 is a conical wall surface. The gas flows along the conical wall surface of the first chamber 150. During the flow of the gas in the first chamber 150, various secondary flows such as eddies and backflows are formed. These eddies and backflows are eliminated by the corresponding first protrusion 123 or second protrusion 151. The number of second protrusions 151 is preferably 6-9.

[0075] like Figure 3The valve core 120 includes an abutment portion 124 and a vibration damping portion 125. The abutment portion 124 is located at the second end 122 of the valve core 120, and the vibration damping portion 125 is located at the first end 121 of the valve core 120. The first protrusion 123 is strip-shaped and extends along the axial direction of the valve core 120.

[0076] In this embodiment, the abutment portion 124 is used to abut against the valve seat 111, and the first protrusion 123 provided on the vibration damping portion 125 is used to eliminate the vibration of the valve core 120. The first protrusion 123 is strip-shaped and extends along the axial direction of the valve core 120 and along the entire axial length of the vibration damping portion 125. This arrangement increases the area of ​​the first protrusion 123, thereby improving the efficiency of eliminating the vortex pulsation force of the gas.

[0077] It should be noted that the contact part 124 is located outside the first chamber 150, and the vibration damping part 125 is located inside the first chamber 150.

[0078] like Figure 3 As shown, the vibration damping part 125 includes a first column 1251 and a second column 1252. The first column 1251 is located between the abutting part 124 and the second column 1252, and the radial cross-sectional diameter of the first column 1251 is larger than the radial cross-sectional diameter of the second column 1252. The first protrusion 123 includes a first column protrusion 1231 and a second column protrusion 1232.

[0079] The first column protrusion 1231 is disposed on the side surface of the first column 1251, and the second column protrusion 1232 is disposed on the side surface of the second column 1252; the height of the first column protrusion 1231 protruding from the first column 1251 is [missing information]. The width of the first column protrusion 1231 along the circumference of the valve core 120 is... The radius of the first column 1251 is .

[0080] The height by which the second column protrusion 1232 protrudes from the first column 1251 is [missing information]. The width of the second column protrusion 1232 along the circumference of the valve core 120 is... The radius of the second prism 1252 is .

[0081] in, Greater than ; 0.1 ≤ ≤0.3 0.35 ≤ ≤0.65 0.17 ≤ ≤0.35 0.25 ≤ ≤0.5 .

[0082] In this embodiment, the radial cross-sectional diameter of the first column 1251 is larger than that of the second column 1252, so as to reduce the space occupied by the valve core 120 in the first cavity, thereby increasing the amount of gas that the first cavity can hold; in addition, the relevant parameters of the first column 1251, the second column 1252, the first column protrusion 1231 and the second column protrusion 1232 are beneficial to the performance of the first protrusion 123 in eliminating periodic eddy current pulsation.

[0083] It should be noted that there are multiple protrusions 1231 and 1232 on the first column, and both the first column 1251 and 1252 are hollow columns. In addition, the number of protrusions 1231 and 1232 is even, preferably 6.

[0084] like Figures 3 to 4 The second protrusion 151 is strip-shaped and extends along the axial direction of the valve core 120.

[0085] In this embodiment, the arrangement of the second protrusion 151 increases the area of ​​the first protrusion 123, thereby improving the efficiency of eliminating the vortex pulsation of the gas.

[0086] The height by which the second protrusion 151 protrudes from the inner wall of the first chamber 150 is [missing information]. The width of the second protrusion 151 along the circumferential direction of the valve body 110 is... The radius of the port of the first chamber 150 near the valve seat 111 is... The radius of the port of the first chamber 150 near the membrane 130 is .

[0087] in, =( + ) / 2, 0.3 ≤ ≤0.55 0.2 ≤ ≤0.38 .

[0088] In this embodiment, the design of the relevant parameters of the second protrusion 151 and the first chamber 150 is beneficial to the performance of the second protrusion 151 in eliminating periodic eddy current pulsation.

[0089] It should be noted that, It is the radius of the cross-section at the midpoint of the axial direction in the first chamber 150.

[0090] Preferably, the first protrusion 123 has a semi-circular cross-section. The second protrusion 151 has a triangular cross-section. Alternatively, the first and second protrusions can also be formed in other shapes.

[0091] In this embodiment, the semi-circular cross-section of the first protrusion 123 helps to reduce the friction between the gas flow and the valve core 120, reducing the possibility of the valve core 120 generating air vibration. The triangular cross-section of the second protrusion 151 provides strong stability and makes it less likely for the valve body 110 to vibrate.

[0092] like Figure 2 The gas proportional valve 100 also includes an electromagnet 160, which is connected to the first end 121 of the valve core 120 and is disposed on one side of the diaphragm 130, while the valve seat 111 is disposed on the other side of the diaphragm 130.

[0093] The valve body 110 is also provided with an air inlet 112 and an air outlet 113. The air inlet 112 is connected to the first chamber 150. The air inlet 112 faces the valve core 120 and the orientation of the air inlet 112 is perpendicular to the axis of the valve core 120. The air outlet 113 is connected to the side of the valve seat 111 away from the diaphragm 130.

[0094] In this embodiment, the arrangement of the air inlet 112 is beneficial for the first protrusion 123 and the second protrusion 151 to eliminate the periodic vortex pulsation force generated by the gas.

[0095] It should be noted that the air inlet 112 is located on the right side of the first chamber 150. The pressure of the gas on the user side is approximately 2000~4000Pa. The gas enters the inner cavity of the gas proportional valve 100 through the air inlet 112. After the valve core 120 is raised due to electromagnetic action, the valve opens, and the gas turns upward and flows through the annular gap to the rear end of the gas proportional valve 100. In addition, the protrusion angle of the second protrusion 151 is ∠1, and 20°≤∠1≤35°.

[0096] like Figure 2 As shown, the contact portion 124 has a trumpet-shaped structure and converges toward the membrane 130.

[0097] The elastic element 140 is a spring and is disposed inside the trumpet-shaped structure.

[0098] In other embodiments, the elastic element 140 may also be other existing components capable of performing biasing functions.

[0099] The electromagnet 160 includes a coil frame 161 and a magnet 162. A sleeve is provided on the coil frame 161. The first end 121 of the valve core 120 is connected to a valve core shaft 126, which is inserted into the sleeve. The magnet 162 here refers to a soft magnet. The electromagnet 160 has been widely used in existing technology and will not be described in detail here.

[0100] like Figure 2 As shown, the valve core 120 is hollow inside, and the valve core shaft 126 is installed on the first end 121 of the valve core 120 by bolts inside the valve core 120. The valve core shaft 126 is inserted into the sleeve, which is a loose connection.

[0101] 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, thus closing the gas proportional valve 100. The second end 122 of the valve core 120 then moves towards the valve body 110 under the drive of the electromagnet 160. Figure 2 When the valve core 120 moves upward, it disengages from the valve seat 111, thereby opening the gas passage within the valve body 110. Since the second end 122 of the valve core 120 has a trumpet-shaped structure and converges towards the diaphragm 130, the higher the valve core 120 moves, the larger the annular gap between the valve seat 111 and the second end 122 of the valve core 120, thus increasing the opening degree of the gas passage within the valve body 110. The flow rate of the gas passing through the gas proportional valve 100 can be controlled by driving the electromagnet in the gas proportional valve 100.

[0102] like Figure 2 As shown, the gas proportional valve 100 has an air inlet 112 located on the right side of the first chamber 150. High-pressure gas enters the first chamber 150 from the right air inlet 112. When the coil frame 161 is energized, it generates a repulsive force with the magnet 162, causing the coil to move upward. At the same time, it pushes the valve core shaft 126 to move the valve core 120 upward, opening the valve. The gas flows to the rear end of the valve through the annular gap between the valve core 120 and the valve seat 111.

[0103] The main functions of the first protrusion 123 and the second protrusion 151 are to weaken the circumferential flow effect formed by the gas flowing in from the right side in the first chamber 150, so that the gas only has axial and radial main flow when it flows to the outlet 113 of the gas proportional valve 100. Therefore, various secondary flows caused by circumferential flow are eliminated, and the gas vibration of the valve core 120 is avoided.

[0104] The first protrusion 123 and the second protrusion 151 are located on the inner wall surfaces of the valve core 120 and the first chamber 150, respectively. The structure is simple and does not change the original manufacturing process.

[0105] The first protrusion 123 and the second protrusion 151 do not affect the characteristics of the gas proportional valve 100, such as flow rate, front and rear pressure, and other parameters.

[0106] This embodiment also provides a stove, which includes the gas proportional valve 100 as described above.

[0107] 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.

[0108] 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 comprising: The valve body, a valve core arranged in the valve body, a diaphragm, and an elastic member; The valve body is provided with a valve seat, the first end of the valve core is connected to the diaphragm, the second end of the valve core is used to abut against the valve seat, and the elastic member biases the valve core in a direction in which the second end of the valve core abuts against the valve seat; The outer surface of the valve core is provided with a plurality of first protrusions arranged along the circumference of the valve core.

2. Gas proportional valve according to claim 1, characterized in that The interior of the valve body forms a first chamber between the valve seat and the diaphragm, the valve core is arranged in the first chamber, and a plurality of second protrusions are arranged on the inner wall surface of the first chamber around the valve core along the circumference of the valve core.

3. The gas proportional valve as claimed in claim 1, characterized in that The valve core comprises an abutting portion and a vibration-proof portion, the abutting portion is located at the second end of the valve core, the vibration-proof portion is located at the first end of the valve core, the first protrusions are in the shape of a strip and extend along the axial direction of the valve core.

4. Gas proportional valve according to claim 3, characterized in that The vibration-proof portion comprises a first column and a second column, the first column is located between the abutting portion and the second column, and the radial cross-sectional diameter of the first column is greater than the radial cross-sectional diameter of the second column; the first protrusions comprise first column protrusions and second column protrusions. The first cylinder protrusion is arranged on the side surface of the first cylinder, and the second cylinder protrusion is arranged on the side surface of the second cylinder; the height of the first cylinder protrusion protruding from the first cylinder is ; the width of the first cylinder protrusion along the circumference of the valve core is ; and the radius of the first cylinder is . The second cylinder protrusion protrudes from the first cylinder by a height of ; the second cylinder protrusion has a width along a circumference of the spool of ; and the second cylinder has a radius of ; wherein greater than ; 0.1 ≤ ≤ 0.3 , 0.35 ≤ ≤ 0.65 , 0.17 ≤ ≤ 0.35 , 0.25 ≤ ≤ 0.5 .

5. The gas proportional valve as claimed in claim 2, characterized in that The second protrusions are in the shape of a strip and extend along the axial direction of the valve core.

6. Gas proportional valve according to claim 5, characterized in that The height of the second protrusion protruding from the inner wall surface of the first chamber is ; the width of the second protrusion along the circumference of the valve body is ; the radius of the port of the first chamber close to the valve seat is ; and the radius of the port of the first chamber close to the skin film is ; wherein ( + ) / 2, 0.3 ≤ ≤0.55 , 0.2 ≤ ≤0.38 .

7. The gas proportional valve as claimed in claim 2, characterized in that The cross section of the first protrusions is semicircular, and / or the cross section of the second protrusions is triangular.

8. The gas proportional valve as claimed in claim 2, 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. 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. The valve body is further provided with an air inlet and an air outlet, the air inlet is communicated with the first chamber, the air inlet faces the valve core and the direction of the air inlet is perpendicular to the axial direction of the valve core, and the air outlet is communicated with the side of the valve seat away from the diaphragm.

9. The gas proportional valve as claimed in claim 3, characterized in that The abutting portion is in the shape of a horn and converges towards the diaphragm. The elastic member is a spring and is arranged inside the horn-shaped structure.

10. A hob, characterized in that The gas proportional valve comprises the valve body, the valve core arranged in the valve body, the diaphragm, and the elastic member.

Images