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, 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, and the second end of the valve element is used for abutting against the valve seat. A limiting part is arranged on the side, away from the leather film, of the valve seat, the limiting part surrounds the second end of the valve element and is provided with limiting bosses used for being connected with the second end of the valve element in an abutting mode, and a notch concaved inwards relative to the limiting bosses is formed between every two adjacent limiting bosses. According to the gas proportional valve, the limiting part is arranged on one side of the valve seat, so that the valve element can abut against the second end of the valve element when the valve element moves in the radial direction due to the gas vibration phenomenon, the first end of the valve element is limited by a leather film, the valve element is prevented from moving in the radial direction, and meanwhile the notch is formed in the limiting part and can allow gas flow to pass through; and normal fuel gas passing through the fuel gas proportional valve cannot be hindered.

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 gas proportional valve has the following shortcomings:

[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, and the position of the valve core head shifts in a larger 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 opens), the gas flows through the valve. Since the gas in the valve cavity only enters from the right side, the turbulent effect of the gas is very strong, and periodic vortex flow and other secondary flow are generated in the valve flow passage, which acts on the valve core and makes the valve core subject to periodic pulsating force. In some specific operating conditions, when the pneumatic frequency is close to the valve system frequency, the valve core produces axial and radial vibration in the valve body, i.e. gas vibration phenomenon. The occurrence of gas vibration affects the stability of the gas flow, the generated vibration noise is radiated to the user, the sound quality of the product is reduced, and the use experience is affected. INVENTION CONTENTS

[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 operating 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 second end of the valve core is used to abut against the valve seat, 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 limiting portion is annularly arranged at the second end of the valve core and has a limiting boss for abutting against the second end of the valve core, and a gap is formed between two adjacent limiting bosses and is recessed inwardly relative to the limiting boss.

[0011] In the scheme, the gas proportional valve is provided with a limiting portion on one side of the valve seat, so that when the valve core moves radially due to gas vibration, the second end of the valve core is abutted, and the first end of the valve core is limited by the skin film, thereby avoiding radial movement of the valve core. At the same time, the limiting portion is provided with a gap, which can allow gas flow and will not hinder the normal gas flow in the gas proportional valve.

[0012] Preferably, the gas proportional valve satisfies the following condition: 0.25mm≤i≤0.4mm;

[0013] Wherein, i is the distance between the inner circumferential surface of the boss and the outer circumferential surface of the second end of the valve core when the valve core abuts against the valve seat.

[0014] In the scheme, the predetermined distance between the inner circumferential surface of the boss and the outer circumferential surface of the second end of the valve core can ensure that the axial movement of the valve core is not blocked, and the radial movement of the valve core is controlled.

[0015] Preferably, the gas proportional valve satisfies the following condition: d≤1mm;

[0016] Wherein, d is the circumferential length of the boss.

[0017] In the scheme, by controlling the circumferential length of d, more space can be left for the gap to avoid blocking the gas flow in the valve body.

[0018] Preferably, the limiting portion is an annular member arranged on the valve seat.

[0019] 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 skin film, and the valve seat is arranged on the other side of the skin film.

[0020] Preferably, the valve body is further provided with an air inlet and an air outlet, the air inlet is communicated between the skin film and the valve seat, and the air outlet is communicated on the side of the valve seat away from the skin film.

[0021] Preferably, the second end of the valve core is a horn-shaped structure and converges towards the skin film.

[0022] Preferably, the elastic member is a spring and is arranged inside the horn-shaped structure.

[0023] 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.

[0024] A gas range comprising the gas proportional valve as described above.

[0025] The positive progress effect of the utility model lies in that the gas proportional valve is provided with a limiting part on one side of the valve seat, so that when the valve core moves radially due to the gas vibration phenomenon, the second end of the valve core is abutted, and the first end of the valve core is limited by the skin, so that the radial movement of the valve core is avoided, and at the same time, the limiting part is provided with a notch, so that the gas flow is allowed to pass through, and the normal gas passing through the gas proportional valve is not hindered. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a perspective structural schematic view of the gas proportional valve according to an embodiment of the utility model.

[0027] Figure 2 It is a sectional structural schematic view of the gas proportional valve according to an embodiment of the utility model.

[0028] Figure 3 It is a perspective structural schematic view of the limiting part according to an embodiment of the utility model.

[0029] Figure 4 It is a sectional structural schematic view of the limiting part according to an embodiment of the utility model.

[0030] The reference signs are as follows: the gas proportional valve 100; the valve core 110; the first end 111; the second end 112; the valve core shaft 120; the skin 130; the elastic piece 140; the limiting part 150; the boss 151; the notch 152; the valve body 160; the valve seat 161; the gas inlet 162; the gas outlet 163; the electromagnet 170; the coil holder 171; the magnet 172. DETAILED DESCRIPTION

[0031] The utility model will be further described by means of examples in combination with the drawings, but the utility model is not limited in the example range.

[0032] As Figures 1-4 shown, the embodiment provides a gas proportional valve 100, which comprises a valve body 160 and a valve core 110, a skin 130 and an elastic piece 140 arranged in the valve body 160.

[0033] The valve body 160 is provided with a valve seat 161, the first end 111 of the valve core 110 is connected to the skin 130, the second end 112 of the valve core 110 is used for abutting against the valve seat 161, and the elastic piece 140 biases the valve core 110 in the direction that the second end 112 of the valve core 110 abuts against the valve seat 161.

[0034] In this valve seat 161, a limiting portion 150 is provided on the side away from the diaphragm 130. The limiting portion 150 is provided around the second end 112 of the valve core 110 and has a limiting boss 151 for abutting against the second end 112 of the valve core 110. A notch 152 is formed between two adjacent limiting bosses 151 that is recessed inward relative to the limiting bosses 151.

[0035] The boss 151 of the limiting part 150 only abuts against the valve core 110 when the second end 112 of the valve core 110 moves radially. When the valve core 110 does not move radially, the boss 151 of the limiting part 150 does not abut against the valve core 110. The "limiting boss 151 for abutting against the second end 112 of the valve core 110" means that the boss 151 abuts against the valve core 110 to prevent the valve core 110 from making excessive radial displacement.

[0036] The gas proportional valve 100 has a limiting part 150 on one side of the valve seat 161, which can abut against the second end 112 of the valve core 110 when the valve core 110 moves radially due to air vibration. The first end 111 of the valve core 110 is restricted by the diaphragm 130, thereby preventing the valve core 110 from moving radially. At the same time, the limiting part 150 is provided with a notch 152 to allow airflow to pass through without hindering the normal gas flow in the gas proportional valve 100.

[0037] like Figure 3 As shown, the gas proportional valve 100 satisfies the following condition: 0.25mm≤i≤0.4mm; where i is the distance between the inner circumferential surface of the boss 151 and the outer circumferential surface of the second end 112 of the valve core 110 when the valve core 110 abuts against the valve seat 161.

[0038] The inner circumferential surface of the boss 151 and the outer circumferential surface of the second end 112 of the valve core 110 are at a predetermined distance, which can ensure that the axial movement of the valve core 120 is unobstructed, while the radial movement of the valve core 110 is controlled.

[0039] like Figure 4 As shown, the gas proportional valve 100 satisfies the following condition: d≤1mm; where d is the circumferential length of the boss 151.

[0040] By controlling the circumferential length of d, more space can be provided for the notch 152, thus avoiding obstruction of gas flow within the valve body 160.

[0041] In this embodiment, the limiting part 150 is an annular member disposed on the valve seat 161. The limiting part 150 is a separate member and is fixed to the valve seat 161.

[0042] In other embodiments, the limiting portion 150 may also be integrally formed on the valve seat 161.

[0043] The second end 112 of the limiting part 150 that is adapted to the valve core 110 is circular in shape, and the notch 152 and the boss 151 in the limiting part 150 are spaced apart and evenly arranged along the circumference.

[0044] When the height of the limiting part 150 is the same as the height of the valve core 110 protruding from the valve seat 161, the valve core 110 is in contact with the valve seat 161.

[0045] The gas proportional valve 100 also includes an electromagnet 170, which is connected to the first end 111 of the valve core 110 and is disposed on one side of the diaphragm 130, while the valve seat 161 is disposed on the other side of the diaphragm 130.

[0046] The valve body 160 is also provided with an air inlet 162 and an air outlet 163. The air inlet 162 is connected between the diaphragm 130 and the valve seat 161, and the air outlet 163 is connected to the side of the valve seat 161 away from the diaphragm 130.

[0047] The gas flows from the inlet 162 of the valve body 160 to the space between the diaphragm 130 and the valve seat 161, and then through the channel between the valve seat 161 and the second end 112 of the valve core 110 to the outlet 163 of the valve body 160.

[0048] The second end 112 of the valve core 110 has a trumpet-shaped structure and converges toward the diaphragm 130.

[0049] In this embodiment, the elastic element 140 is a spring and is disposed inside the trumpet-shaped structure.

[0050] In other embodiments, the elastic element 140 may also be other existing components capable of performing biasing functions.

[0051] The electromagnet 170 includes a coil frame 171 and a magnet 172. A sleeve is provided on the coil frame 171. The first end 111 of the valve core 110 is connected to the valve core shaft 120, which is inserted into the sleeve. The magnet 172 here refers to a soft magnet 172. Electromagnets have been widely used in existing technology and will not be elaborated upon here.

[0052] like Figure 2 As shown, the valve core 110 is hollow inside, and the valve core shaft 120 is installed on the first end 111 of the valve core 110 by bolts inside the valve core 110. The valve core shaft 120 is inserted into the sleeve, which is a loose connection.

[0053] The second end 112 of the valve core 110 closes the gas passage in the valve body 160 by abutting against the valve seat 161, thus closing the gas proportional valve 100. The second end 112 of the valve core 110 then moves towards the valve body 160 under the drive of the electromagnet 170. Figure 2When the valve body 160 moves upward, the valve body 160 is separated from the valve seat 161, so that the gas passage in the valve body 160 is opened, and since the second end 112 of the valve core 110 is a horn-shaped structure and converges towards the diaphragm 130, the more the valve core 110 moves upward, the larger the gap between the valve seat 161 and the second end 112 of the valve core 110, so that the opening of the gas passage in the valve body 160 is larger. 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.

[0054] The embodiment also provides a stove comprising the gas proportional valve 100.

[0055] In the description of the utility model, it is understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0056] Although the specific embodiments of the utility model are described above, those skilled in the art should understand that this is only an example, 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, and 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, diaphragm, and elastic element disposed within 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 second end of the valve core is used to abut against the valve seat, and the elastic member biases the valve core in the direction that causes the second end of the valve core to abut against the valve seat. The valve seat is characterized by having a limiting portion on the side of the valve seat away from the diaphragm, the limiting portion being provided around the second end of the valve core and having a limiting boss for abutting the second end of the valve core, and a notch that is recessed inward relative to the limiting boss being formed between two adjacent limiting bosses.

2. The gas proportional valve as described in claim 1, characterized in that, The gas proportional valve meets the following condition: 0.25mm≤i≤0.4mm; Where i is the distance between the inner circumferential surface of the boss and the outer circumferential surface of the second end of the valve core when the valve core abuts against the valve seat.

3. The gas proportional valve as described in claim 1, characterized in that, The gas proportional valve meets the following condition: d≤1mm; Where d is the circumferential length of the boss.

4. The gas proportional valve as described in claim 1, characterized in that, The limiting part is an annular component disposed on the valve seat.

5. The gas proportional valve as described in claim 1, characterized in that, The gas proportional valve also includes an electromagnet, which is connected to the first end of the valve core and disposed on one side of the diaphragm, and the valve seat is disposed on the other side of the diaphragm.

6. The gas proportional valve as described in claim 1, characterized in that, The valve body is also provided with an air inlet and an air outlet. The air inlet is connected between the diaphragm and the valve seat, and the air outlet is connected to the side of the valve seat away from the diaphragm.

7. The gas proportional valve as described in claim 1, characterized in that, The second end of the valve core has a trumpet-shaped structure and converges toward the diaphragm.

8. The gas proportional valve as described in claim 7, characterized in that, The elastic element is a spring and is disposed inside the flared structure.

9. The gas proportional valve as described in claim 5, characterized in that, The electromagnet includes a coil frame and a magnet. A sleeve is provided on the coil frame. The first end of the valve core is connected to the valve core shaft, and the valve core shaft is inserted into the sleeve.

10. A stove, characterized in that, It includes a gas proportional valve as described in any one of claims 1-9.

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