Piezoelectric gas valve and gas oven having the same

Abstract

This utility model discloses a piezoelectric gas valve and a gas oven having the same, relating to the field of gas stove technology. It includes: a valve seat with a valve seat cavity, a limiting protrusion on the inner wall of the valve seat cavity, and a guide ring that can be raised and lowered within the valve seat cavity; a piezoelectric ignition device including a hammer; a rotating shaft with a first vertical reset groove at its lower end; a valve core with a paddle mounted on it, and a second vertical reset groove at its upper end. A horizontal rod is inserted into the first and second vertical reset grooves. The rotating shaft drives the valve core and the paddle to rotate synchronously via the horizontal rod. The horizontal rod presses against the guide surface of the guide ring, causing the guide ring to press downwards, and the valve spring applies sufficient pressure to the paddle. The paddle then drives the hammer to retract in preparation for ignition, ensuring sufficient stability during the retraction process and preventing slippage and loosening between the paddle and the hammer.

Description

Technical Field

[0001] This utility model relates to the field of gas stove technology, and in particular to a piezoelectric gas valve and a gas oven having the same. Background Technology

[0002] Ignition of a piezoelectric gas valve is achieved through the mechanical force of a knob, which drives a lever to strike a piezoelectric ceramic, generating a spark to ignite the gas. This type of gas valve does not require an external battery / power source, making it particularly suitable for outdoor use. However, in practice, it has been found that after prolonged use, the mechanical structure of the lever can loosen, causing the lever to fail to properly engage the hammer, directly affecting the stability of ignition. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a piezoelectric gas valve and a gas oven incorporating the same.

[0004] According to a first aspect of the present invention, a piezoelectric gas valve includes: a valve seat having a valve seat cavity, a limiting protrusion provided on the inner wall of the valve seat cavity, the limiting protrusion having a first vertical limiting surface, a guide ring that can move up and down within the valve seat cavity, a second vertical limiting surface on the outer side of the guide ring, the first vertical limiting surface abutting against the second vertical limiting surface, and a guide surface at the upper end of the guide ring; a piezoelectric ignition device including a hammer; a rotating shaft inserted into the guide ring, a first vertical reset groove provided at the lower end of the rotating shaft; a valve core located below the rotating shaft, a paddle fitted on the valve core, the paddle capable of locking the hammer, a valve closing spring provided between the upper side of the paddle and the lower side of the guide ring, a second vertical reset groove provided at the upper end of the valve core, a horizontal rod inserted into the first vertical reset groove and the second vertical reset groove, the lower side of the horizontal rod abutting against the guide surface.

[0005] According to some embodiments of the present invention, the upper end of the valve seat has a valve seat through hole, the upper end of the rotating shaft is provided with a rotating shaft connecting end, the rotating shaft connecting end extends upward through the valve seat through hole, and an open snap ring is provided on the rotating shaft connecting end, the open snap ring abuts against the upper end face of the valve seat.

[0006] According to some embodiments of the present invention, the two ends of the horizontal rod extend outward from the first vertical reset groove and the second vertical reset groove, respectively, and the two ends of the horizontal rod can abut against the first vertical limiting surface.

[0007] According to some embodiments of the present invention, the lower side of the rotating shaft has a rotating shaft cavity, the upper end of the valve core is inserted into the rotating shaft cavity, and a rotating shaft top rod return spring is provided between the lower side of the top wall of the rotating shaft cavity and the upper side of the horizontal rod, the rotating shaft top rod return spring being able to apply downward pressure to the horizontal rod.

[0008] According to some embodiments of this utility model, a valve core pressure plate is provided on the lower side of the guide ring. The valve core pressure plate includes an outer ring of the pressure plate and a middle rod of the pressure plate. The middle rod of the pressure plate is located inside the outer ring of the pressure plate. The outer ring of the pressure plate is fitted onto the outer wall of the rotating shaft. The middle rod of the pressure plate passes through the first vertical reset groove and the second vertical reset groove. The lower side of the outer ring of the pressure plate abuts against the upper side of the closing valve spring.

[0009] According to some embodiments of the present invention, an outer protrusion is provided on the outer wall of the guide ring, the outer protrusion includes a vertical part and a horizontal part, the second vertical limiting surface is located on the vertical part of the protrusion, and a gap is left between the horizontal part of the protrusion and the inner wall of the valve seat cavity.

[0010] According to some embodiments of this utility model, a reset groove is provided on the guide surface, and the reset groove can hold the horizontal bar.

[0011] According to some embodiments of the present invention, the upper end of the valve core has a non-circular valve core connecting end, the paddle has a non-circular paddle hole, the non-circular valve core connecting end is inserted into the non-circular paddle hole, and a paddle plate is provided on the outer wall of the paddle, the paddle plate being able to hold the hammer.

[0012] According to some embodiments of the present invention, the piezoelectric ignition device includes a hammer and a hammer spring, a piezoelectric ceramic wire end, and a metal washer. The hammer spring is located on the rear side of the hammer, a hammer side plate is provided on the side wall of the hammer, and the metal washer and the piezoelectric ceramic wire end are sequentially arranged on the front side of the hammer.

[0013] The piezoelectric gas valve according to the embodiments of this utility model has at least the following technical effects: 1. The rotating shaft drives the valve core and the paddle to rotate synchronously through the horizontal rod. During the rotation of the rotating shaft, the horizontal rod presses against the guide surface of the guide ring, causing the guide ring to press down and the valve spring to apply sufficient pressure to the paddle. The paddle can then drive the hammer to move backward in preparation for ignition. This ensures that the paddle is stable enough during the backward movement of the hammer and prevents slippage and loosening between the paddle and the hammer. 2. The guide ring presses down on the valve closing spring through the valve core pressure plate, making the process of the guide ring pressing down on the valve closing spring more stable; 3. The design of the outer protrusion of the guide ring having both a vertical and a horizontal part not only improves the structural strength of the vertical part, but also makes the guide ring move more smoothly in the valve seat cavity, preventing it from becoming too skewed and stuck in the valve seat cavity during its movement.

[0014] A gas oven according to a second aspect of the present invention includes a piezoelectric gas valve according to the first aspect of the present invention described above.

[0015] The gas oven according to the present invention has at least the following technical effects: the rotating shaft drives the valve core and the paddle to rotate synchronously through the horizontal rod. During the rotation of the rotating shaft, the horizontal rod presses against the guide surface of the guide ring, causing the guide ring to press down and the valve spring to apply sufficient pressure to the paddle. The paddle can then drive the hammer to move backward in preparation for ignition, and ensure that the paddle is stable enough during the backward movement of the hammer, avoiding slippage and loosening between the paddle and the hammer.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] Additional aspects and advantages of this invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a perspective view of the piezoelectric gas valve of this utility model; Figure 2 This is a schematic diagram of the structure of the piezoelectric gas valve of this utility model; Figure 3 yes Figure 2 Enlarged view of region A in the middle; Figure 4 This is a three-dimensional sectional view of the piezoelectric gas valve of this utility model; Figure 5 yes Figure 4 Enlarged view of region B in the middle; Figure 6 This is an exploded view of the structure of the piezoelectric gas valve of this utility model; Figure 7 This is a schematic diagram illustrating the working principle of this utility model; Figure 8 This is a perspective view of the valve seat of this utility model; Figure 9 This is an exploded view of the piezoelectric ignition device of this utility model; Figure 10 This is a perspective view of the guide ring of this utility model; Figure 11 This is a perspective view of the valve core pressure plate of this utility model.

[0018] Figure label: Valve seat 100, valve seat cavity 110, limiting protrusion 120, first vertical limiting surface 121, valve seat through hole 130; piezoelectric ignition device 200, hammer 210, hammer side plate 211, hammer spring 220, piezoelectric ceramic wire end 230, metal gasket 240; rotating shaft 300, first vertical reset groove 310, rotating shaft connecting end 320, open snap ring 321, rotating shaft cavity 330; valve core 400, second vertical reset groove 410, valve core non-circular connecting end 420; guide ring 500, outer protrusion 510, vertical part of protrusion 511, horizontal part of protrusion 512, second vertical limiting surface 513, guide surface 520, reset groove 521; paddle 600, non-circular hole of paddle 610, paddle plate 620; horizontal rod 700, valve closing spring 701, rotating shaft top rod reset spring 702; valve core pressure plate 800, outer ring of pressure plate 810, middle rod of pressure plate 820; valve body 900, air inlet 910, air outlet 920, solenoid valve 930, valve core needle 940. Detailed Implementation

[0019] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0020] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional 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.

[0021] In the description of this utility model, "multiple" means two or more, and "greater than," "less than," "exceeding," etc., are understood to exclude the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or their sequential relationship.

[0022] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0023] The following is for reference. Figure 1 and Figure 2 A piezoelectric gas valve according to an embodiment of the present invention is described.

[0024] like Figure 1 and Figure 2 As shown, the piezoelectric gas valve according to an embodiment of the present invention includes a valve seat 100, a piezoelectric ignition device 200, a rotating shaft 300, and a valve core 400.

[0025] Reference Figure 3 , Figure 4 The valve seat 100 has a valve seat cavity 110. A limiting protrusion 120 is provided on the inner wall of the valve seat cavity 110. The limiting protrusion 120 has a first vertical limiting surface 121. A guide ring 500 that can move up and down is provided inside the valve seat cavity 110. The outer side of the guide ring 500 has a second vertical limiting surface 513. The first vertical limiting surface 121 abuts against the second vertical limiting surface 513. The upper end of the guide ring 500 has a guide surface 520. The piezoelectric ignition device 200 includes a hammer 210. (Refer to...) Figure 5 , Figure 6 The rotating shaft 300 is inserted into the guide ring 500, and the lower end of the rotating shaft 300 is provided with a first vertical reset groove 310; the valve core 400 is located on the lower side of the rotating shaft 300, and a paddle 600 is fitted on the valve core 400. The paddle 600 can hold the hammer 210. A valve closing spring 701 is provided between the upper side of the paddle 600 and the lower side of the guide ring 500. The upper end of the valve core 400 is provided with a second vertical reset groove 410. A horizontal rod 700 is inserted into the first vertical reset groove 310 and the second vertical reset groove 410. The lower side of the horizontal rod 700 abuts against the guide surface 520.

[0026] For example, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the valve seat 100 is relatively fixed. The valve seat 100 has a valve seat cavity 110, and a limiting protrusion 120 is provided on the inner wall of the valve seat cavity 110. The limiting protrusion 120 has a first vertical limiting surface 121. The limiting protrusion 120 is fixed within the valve seat 100. (Refer to...) Figure 5The valve seat cavity 110 is provided with a guide ring 500 that can move up and down. The outer side of the guide ring 500 has a second vertical limiting surface 513, and the first vertical limiting surface 121 abuts against the second vertical limiting surface 513. The upper end of the guide ring 500 has a guide surface 520. That is, the guide ring 500 can move up and down in the valve seat cavity 110, but cannot rotate, including not rotating around the vertical axis. The piezoelectric ignition device 200 includes a hammer 210. Based on the piezoelectric effect principle, the hammer 210 is responsible for applying an impact force to the dielectric to complete the ignition work. The rotating shaft 300 is inserted into the guide ring 500. The rotating shaft 300 can rotate around the vertical axis in the valve seat cavity 110, but cannot move up and down. The lower end of the rotating shaft 300 has a first vertical reset groove 310; the valve core 400 is located below the rotating shaft 300 and can also rotate around the vertical axis. A lever 600 is fitted onto the valve core 400, and the lever 600 can hold the hammer 210. The lever 600 can rotate with the valve core 400 to drive the hammer 210 to retract and reset. A valve closing spring 701 is provided between the upper side of the lever 600 and the lower side of the guide ring 500, and the valve closing spring 701 can apply downward pressure to the lever 600. (Refer to...) Figure 6 The valve core 400 has a second vertical reset groove 410 at its upper end. A horizontal rod 700 is inserted into both the first and second vertical reset grooves 310, effectively locking them in place. The first vertical reset groove 310 of the rotating shaft 300 and the second vertical reset groove 410 of the valve core 400 allow the rotating shaft 300 and the valve core 400 to rotate synchronously. The horizontal rod 700 can also move up and down along the extension direction of the first and second vertical reset grooves 310 and 410. The lower side of the horizontal rod 700 abuts against the guide surface 520, causing the horizontal rod 700 to abut against the guide ring 500.

[0027] In practical work, refer to Figure 7 By rotating the aforementioned shaft 300, the shaft 300 can drive the valve core 400 and the paddle 600 to rotate synchronously via the horizontal rod 700. The paddle 600 can then drive the hammer 210 to retract, preparing for ignition.

[0028] During the rotation of the shaft 300, the horizontal rod 700 presses against the guide surface 520 of the guide ring 500, causing the guide ring 500 to press down on the closing valve spring 701. The closing valve spring 701 then applies pressure to the paddle 600, exerting a greater downward force. This ensures that the paddle 600 is sufficiently stable during the backward movement of the hammer 210, preventing slippage and loosening between the paddle 600 and the hammer 210.

[0029] In some embodiments of this utility model, reference is made to Figure 2 , Figure 4A valve body 900 is located on the lower side of the valve seat 100, and the valve body 900 has an air inlet 910 and an air outlet 920. A valve core 400 is located inside the valve body 900, and a solenoid valve 930 is also installed inside the valve body 900. A valve core needle 940, which can move up and down, is installed inside the valve core 400. Gas enters the valve seat 100 through the air inlet 910 and exits through the air outlet 920. The rotation of the valve core 400 controls the flow rate of the incoming and outgoing gas. The valve core needle 940 pushes the solenoid valve 930 to open the solenoid valve 930, thus opening the air inlet 910 and the air outlet 920 for ventilation.

[0030] In some embodiments of this utility model, the upper end of the valve seat 100 has a valve seat through hole 130, and the upper end of the rotating shaft 300 is provided with a rotating shaft connecting end 320. The rotating shaft connecting end 320 extends upward through the valve seat through hole 130, and an open snap ring 321 is provided on the rotating shaft connecting end 321, which abuts against the upper end surface of the valve seat 100. The rotating shaft connecting end 320 is used to connect a mechanical knob or other similar device to facilitate the control of the rotation of the rotating shaft 300. The open snap ring 321 locks the rotating shaft 300 and abuts against the valve seat 100, making the rotating shaft 300 more stable.

[0031] In some embodiments of this utility model, the two ends of the horizontal rod 700 extend outwards into a first vertical reset groove 310 and a second vertical reset groove 410, respectively, and the two ends of the horizontal rod 700 can abut against the first vertical limiting surface 121. This allows the rotational range of the horizontal rod 700 to be limited by the first vertical limiting surface 121 of the limiting protrusion 120, thereby limiting the rotational range of the rotating shaft 300 and the valve core 400. Specifically, the rotational range of the rotating shaft 300 and the valve core 400 is determined by the position of the first vertical limiting surface 121 of the limiting protrusion 120.

[0032] In some embodiments of this utility model, reference is made to Figure 2 , Figure 3 The lower side of the rotating shaft 300 has a rotating shaft cavity 330. The upper end of the valve core 400 is inserted into the rotating shaft cavity 330. A rotating shaft push rod return spring 702 is provided between the lower side of the top wall of the rotating shaft cavity 330 and the upper side of the horizontal rod 700. The rotating shaft push rod return spring 702 can apply downward pressure to the horizontal rod 700. That is, while the horizontal rod 700 can move up and down along the first vertical return groove 310 and the second vertical return groove 410, the rotating shaft push rod return spring 702 can also make the horizontal rod 700 press down to press the guide ring 500.

[0033] In some embodiments of this utility model, reference is made to Figure 3 , Figure 6 , Figure 11A valve core pressure plate 800 is provided on the lower side of the guide ring 500. The valve core pressure plate 800 includes an outer ring 810 and a middle rod 820. The middle rod 820 is located inside the outer ring 810, which is fitted onto the outer wall of the rotating shaft 300. The middle rod 820 passes through the first vertical reset groove 310 and the second vertical reset groove 410. The lower side of the outer ring presses against the upper side of the valve closing spring 701. The middle rod 820 is inserted into the first vertical reset groove 310 and the second vertical reset groove 410, meaning that the valve core pressure plate 800 also rotates synchronously with the rotating shaft 300 and the valve core 400, allowing the valve core pressure plate 800 to be adjusted up and down like the guide ring 500. The guide ring 500 presses down on the valve closing spring 701 through the valve core pressure plate 800, making the process of the guide ring 500 pressing down on the valve closing spring 701 more stable.

[0034] In some embodiments of this utility model, reference is made to Figure 8 , Figure 10 An outer protrusion 510 is provided on the outer wall of the guide ring 500. The outer protrusion 510 includes a vertical portion 511 and a horizontal portion 512. A second vertical limiting surface 513 is located on the vertical portion 511. A gap is left between the horizontal portion 512 and the inner wall of the valve seat cavity 110. The design of the horizontal portion 512 not only improves the structural strength of the vertical portion 511, but also makes the guide ring 500 move more smoothly in the valve seat cavity 110, preventing the guide ring 500 from being too lateral and stuck in the valve seat cavity 110 during its movement.

[0035] In some embodiments of this utility model, reference is made to Figure 7 , Figure 10 A reset groove 521 is provided on the guide surface 520, which can hold the horizontal rod 700. The horizontal rod 700 rotates with the rotating shaft 300 and the valve core 400. When the horizontal rod 700 rotates to the position of the reset groove 521, the reset groove 521 can hold the horizontal rod 700, that is, the rotating shaft 300 and the valve core 400 rotate to the initial position. When the horizontal rod 700 is held in the position of the reset groove 521, the guide ring 500 can be raised to a certain height, the pressure of the guide ring 500 on the closing valve spring 701 is reduced, and the pressure of the closing valve spring 701 on the lever 600 is reduced. The lever 600 can then be adjusted up and down slightly, so that the lever 600 can be offset from the valve core 400 when it is reset.

[0036] In some embodiments of this utility model, reference is made to Figure 6 , Figure 7The valve core 400 has a non-circular connecting end 420 at its upper end. A non-circular hole 610 is provided on the paddle 600, and the non-circular connecting end 420 is inserted into the non-circular hole 610. A paddle plate 620 is provided on the outer wall of the paddle 600, which can hold the hammer 210. The insertion of the non-circular connecting end 420 of the valve core 400 into the non-circular hole 610 of the paddle 600 ensures that the valve core 400 can drive the paddle 600 to rotate smoothly. The paddle 600 drives the hammer 210 through the paddle plate 620.

[0037] In some embodiments of this utility model, reference is made to Figure 7 , Figure 9 The piezoelectric ignition device 200 includes a hammer 210, a hammer spring 220, a piezoelectric ceramic wire 230, and a metal washer 240. The hammer spring 220 is located behind the hammer 210, and a hammer side plate 211 is provided on the side wall of the hammer 210. The metal washer 240 and the piezoelectric ceramic wire 230 are sequentially arranged on the front side of the hammer 210. That is, the piezoelectric ceramic wire 230 is installed at a position aligned with the hammer 210, and the hammer spring 220 is installed on the end of the hammer 210 away from the piezoelectric ceramic wire 230.

[0038] The valve core 400 can drive the paddle 600 to rotate. The sliding direction of the piezoelectric ignition device 200 is tangential to the rotation direction of the paddle 600. When the paddle 600 rotates, the hammer side plate 211 of the paddle 600 will drive the hammer 210 to slide towards the hammer spring 220, causing the hammer spring 220 to be compressed. When the paddle 600 continues to rotate, the hammer side plate 211 of the paddle 600 will disengage from the hammer 210, so that the hammer 210 will be pushed and struck by the elastic force of the hammer spring 220 to strike the metal washer 240 and then the piezoelectric ceramic wire end 230, thereby generating a high-voltage spark in the piezoelectric ceramic wire end 230. This high-voltage spark is transmitted to the valve body 900 through the wire to ignite the gas in the gas outlet 920.

[0039] A gas oven according to a second aspect of the present invention includes a piezoelectric gas valve according to the first aspect of the present invention described above.

[0040] According to the embodiments of the present invention, the gas oven adopts the above-mentioned piezoelectric gas valve, which reduces the working limitations of the gas oven, facilitates the convenient design of the gas oven, and improves the user experience.

[0041] Other components and operations of the gas oven according to the embodiments of this utility model are known to those skilled in the art and will not be described in detail here.

[0042] The following is for reference. Figure 1 and Figure 2The piezoelectric gas valve according to an embodiment of the present invention is described in detail with reference to a specific example. It is to be understood that the following description is merely illustrative and not intended to limit the scope of the invention.

[0043] like Figure 1 and Figure 2 As shown, the piezoelectric gas valve according to an embodiment of the present utility model includes a valve seat 100, a piezoelectric ignition device 200, a rotating shaft 300, a valve core 400, a guide ring 500, a paddle 600, a horizontal rod 700, a valve core pressure plate 800, and a valve body 900.

[0044] The valve seat 100 includes a valve seat cavity 110, a limiting protrusion 120, a first vertical limiting surface 121, and a valve seat through hole 130. The rotating shaft 300 is provided with a first vertical reset groove 310, a rotating shaft connecting end 320, an open retaining ring 321, and a rotating shaft cavity 330. The guide ring 500 is provided with an outer protrusion 510, a vertical portion 511 of the protrusion, a horizontal portion 512 of the protrusion, a second vertical limiting surface 513, a guide surface 520, and a reset groove 521. There is a horizontal rod 700, a valve closing spring 701, and a rotating shaft push rod reset spring 702. The valve core pressure plate 800 is provided with an outer pressure plate ring 810 and a middle pressure plate rod 820.

[0045] The valve body 900 is provided with an air inlet 910, an air outlet 920, a solenoid valve 930, and a valve core needle 940. The valve core 400 is provided with a second vertical reset groove 410 and a valve core non-circular connecting end 420. The lever 600 is provided with a lever non-circular hole 610 and a lever plate 620.

[0046] The piezoelectric ignition device 200 includes a hammer 210, a hammer side plate 211, a hammer spring 220, a piezoelectric ceramic wire end 230, and a metal gasket 240.

[0047] In actual operation, the user rotates the shaft 300 on the valve seat 100 by operating a mechanical knob. When the shaft 300 rotates, it also drives the valve core 400 in the valve body to rotate along with it via the horizontal rod 700.

[0048] During the rotation of the horizontal rod 700, the guide ring 500 does not rotate due to the restriction of the outer protrusion 510 and the limiting protrusion 120 of the valve seat cavity 110. However, because the rotating shaft push rod return spring 702 applies downward pressure to the horizontal rod 700, and the horizontal rod 700 applies downward pressure to the guide surface 520 of the guide ring 500, the guide ring 500 moves downward under the guidance of the guide surface 520. In this way, under the guidance of the outer protrusion 510 and the limiting protrusion 120, the guide ring 500 can both press the valve core needle 940 through the valve core pressure plate 800 and press the lever 600 downward through the closing spring 701.

[0049] The guide ring 500 presses down on the valve core needle 940 via the valve core pressure plate 800, which in turn triggers the solenoid valve 930, allowing gas to pass through the valve body and output gas from the outlet 920. The guide ring 500, through the valve closing spring 701, presses down on the lever 600, ensuring its stability as it rotates with the valve core 400. The lever 600 then triggers the hammer 210 via the lever 620, striking the piezoelectric ceramic wire 230 to create a spark, igniting the gas output from the outlet 920. Rotation of the valve core 400 controls the gas flow rate from the outlet 920, thus controlling the flame intensity. This is equivalent to simultaneously controlling the flame intensity of the valve core 400 and the ignition of the piezoelectric ignition device by simply rotating the shaft 300, without needing to press it down, achieving the desired ignition effect.

[0050] According to the piezoelectric gas valve of this embodiment, the following effects can be achieved through the following configuration: the rotating shaft 300 can drive the valve core 400 and the paddle 600 to rotate synchronously via the horizontal rod 700. The paddle 600 can then drive the hammer 210 to retract, preparing for ignition. During the rotation of the rotating shaft 300, the horizontal rod 700 presses against the guide surface 520 of the guide ring 500, causing the guide ring 500 to press down on the valve closing spring 701. The valve closing spring 701 then applies pressure to the paddle 600, exerting a greater downward force. This ensures sufficient stability during the retraction of the hammer 210 by the paddle 600, preventing slippage and loosening between the paddle 600 and the hammer 210.

[0051] In the description of this specification, references to terms such as "some embodiments" or "as one might imagine" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0052] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A piezoelectric gas valve, characterized in that, include: A valve seat (100) has a valve seat cavity (110). A limiting protrusion (120) is provided on the inner side wall of the valve seat cavity (110). The limiting protrusion (120) has a first vertical limiting surface (121). A guide ring (500) that can be raised and lowered is provided in the valve seat cavity (110). A second vertical limiting surface (513) is provided on the outer side of the guide ring (500). The first vertical limiting surface (121) abuts against the second vertical limiting surface (513). The upper end of the guide ring (500) has a guide surface (520). A piezoelectric ignition device (200) includes a hammer (210). A rotating shaft (300) is inserted into the guide ring (500), and a first vertical reset groove (310) is provided at the lower end of the rotating shaft (300). A valve core (400) is located below the rotating shaft (300). A paddle (600) is fitted on the valve core (400). The paddle (600) can hold the hammer (210). A valve closing spring (701) is provided between the upper side of the paddle (600) and the lower side of the guide ring (500). A second vertical reset groove (410) is opened at the upper end of the valve core (400). A horizontal rod (700) is inserted into the first vertical reset groove (310) and the second vertical reset groove (410). The lower side of the horizontal rod (700) abuts against the guide surface (520).

2. The piezoelectric gas valve according to claim 1, characterized in that, The valve seat (100) has a valve seat upper through hole (130) at the upper end, and the rotating shaft (300) is provided with a rotating shaft connecting end (320) at the upper end. The rotating shaft connecting end (320) extends upward through the valve seat upper through hole (130), and an open snap ring (321) is provided on the rotating shaft connecting end (320). The open snap ring (321) abuts against the upper end face of the valve seat (100).

3. The piezoelectric gas valve according to claim 1, characterized in that, The horizontal rod (700) has two ends that extend outward from the first vertical reset groove (310) and the second vertical reset groove (410), respectively, and the two ends of the horizontal rod (700) can abut against the first vertical limiting surface (121).

4. The piezoelectric gas valve according to claim 1, characterized in that, The lower side of the rotating shaft (300) has a rotating shaft cavity (330), and the upper end of the valve core (400) is inserted into the rotating shaft cavity (330). A rotating shaft push rod return spring (702) is provided between the lower side of the top wall of the rotating shaft cavity (330) and the upper side of the horizontal rod (700). The rotating shaft push rod return spring (702) can apply downward pressure to the horizontal rod (700).

5. The piezoelectric gas valve according to claim 4, characterized in that, A valve core pressure plate (800) is provided on the lower side of the guide ring (500). The valve core pressure plate (800) includes an outer ring (810) and a middle rod (820). The middle rod (820) is located inside the outer ring (810). The outer ring (810) is fitted onto the outer wall of the rotating shaft (300). The middle rod (820) passes through the first vertical reset groove (310) and the second vertical reset groove (410). The lower side of the outer ring abuts against the upper side of the closing valve spring.

6. The piezoelectric gas valve according to claim 1, characterized in that, The outer wall of the guide ring (500) is provided with an outer protrusion (510), which includes a vertical part (511) and a horizontal part (512). The second vertical limiting surface (513) is located on the vertical part (511), and there is a gap between the horizontal part (512) and the inner wall of the valve seat cavity (110).

7. The piezoelectric gas valve according to claim 1, characterized in that, A reset groove (521) is provided on the guide surface (520), and the reset groove (521) can hold the horizontal rod (700).

8. The piezoelectric gas valve according to claim 1, characterized in that, The valve core (400) has a non-circular valve core connection end (420) at its upper end. The paddle (600) has a non-circular paddle hole (610). The non-circular valve core connection end (420) is inserted into the non-circular paddle hole (610). A paddle plate (620) is provided on the outer wall of the paddle (600). The paddle plate (620) can hold the hammer (210).

9. The piezoelectric gas valve according to claim 1, characterized in that, The piezoelectric ignition device (200) includes the hammer (210), hammer spring (220), piezoelectric ceramic wire end (230), and metal washer (240). The hammer spring (220) is located on the rear side of the hammer (210). The hammer side plate (211) is provided on the side wall of the hammer (210). The metal washer (240) and the piezoelectric ceramic wire end (230) are arranged sequentially on the front side of the hammer (210).

10. A gas-fired oven, characterized in that, Includes a piezoelectric gas valve according to any one of claims 1 to 9.

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