A gas valve and gas appliance

Abstract

The application discloses a gas valve and a gas appliance. The gas valve comprises a valve body, a valve rod assembly and a temperature control device, and a gas passage is arranged in the valve body; the valve rod assembly comprises a valve rod piece, the valve rod piece is rotatably arranged in the valve body and partially located in the gas passage, the valve rod piece can be moved along the axial direction thereof relative to the valve body, and a first tooth part is arranged at one end of the valve rod piece located in the gas passage; the temperature control device comprises a thermal expansion valve and a connecting rod, the thermal expansion valve is partially located in the gas passage, the connecting rod is located in the gas passage, a valve piece is arranged on the connecting rod, the valve piece is used for opening or closing the gas passage, one end of the connecting rod is threadedly connected with one end of the thermal expansion valve, and the other end of the connecting rod is provided with a second tooth part; the first tooth part and the second tooth part are engaged. The connecting rod and the valve rod piece are matched in the tooth engagement structure, the connecting rod can be smoothly moved along the axial direction of the valve rod piece, and therefore the accurate control of the gas output and the combustion temperature of the gas valve is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gas valve, in particular to a gas valve and a gas appliance. BACKGROUND

[0002] The gas valve is installed on the gas equipment such as oven for controlling the power of the burner. Some gas valves are provided with temperature control device, which sets the burning temperature of the gas equipment, and automatically controls the burning temperature of the gas equipment through the temperature control device. The temperature control device is connected with the valve stem of the gas valve through the connecting rod. The valve stem can drive the connecting rod to rotate, and the connecting rod can move along the axial direction of the valve stem. In the prior art, the connecting rod and the valve stem are usually connected through the non-circular hole (such as square hole) arranged on the valve stem and the non-circular matching part arranged on the connecting rod, so as to realize the purpose that the valve stem can drive the connecting rod to rotate and move along the axial direction of the valve stem. The above-mentioned matching structure used in the prior art has single structure, and the connecting rod may be stuck when moving along the axial direction of the valve stem in the use process of the gas valve, which makes the control of the gas output and the burning temperature of the gas valve not accurate. SUMMARY

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application provides a gas valve to diversify the matching structure of the connecting rod and the valve stem, and to make the connecting rod move along the axial direction of the valve stem smoothly, so as to ensure the accurate control of the gas output and the burning temperature of the gas valve.

[0004] The present application also provides a gas appliance using the above-mentioned gas valve.

[0005] According to the gas valve of the first aspect of the present application, the valve body is provided with a gas passage; the valve stem assembly includes a valve stem, which is rotatably arranged in the valve body and partially located in the gas passage, and the valve stem can move along its axial direction relative to the valve body, and the valve stem is provided with a first tooth part around its rotation axis at one end of the gas passage; the temperature control device includes a thermal expansion valve and a connecting rod, the thermal expansion valve is partially located in the gas passage, the connecting rod is located in the gas passage, the connecting rod is provided with a valve piece, the valve piece is used to open or close the gas passage, one end of the connecting rod is threadedly connected with one end of the thermal expansion valve, and the other end of the connecting rod is provided with a second tooth part; wherein the first tooth part and the second tooth part are engaged, so that the connecting rod can rotate with the valve stem and move along the axial direction of the valve stem.

[0006] The gas valve according to the embodiments of the present application has at least the following beneficial effects: the first tooth part and the second tooth part are used to engage the connecting rod and the valve rod, so that the connecting rod can rotate with the valve rod and move along the axial direction of the valve rod, the engagement structure between the connecting rod and the valve rod is diversified, and the connecting rod can move along the axial direction of the valve rod smoothly, so that the gas output and the combustion temperature of the gas valve can be accurately controlled.

[0007] According to some embodiments of the present application, one of the valve rod and the connecting rod is provided with a circular hole extending along the axial direction, and the other is provided with a connecting part extending along the radial direction of the valve rod or the connecting rod, the first tooth part is arranged along the circumferential direction of the side wall of the circular hole, the second tooth part is arranged on the side of the connecting part away from the valve rod or the connecting rod, and the connecting part is inserted into the circular hole so that the first tooth part and the second tooth part are engaged.

[0008] According to some embodiments of the present application, the connecting part is in the form of a ring structure, and the second tooth part is arranged along the circumferential direction of the connecting part.

[0009] According to some embodiments of the present application, the connecting part is arranged on the connecting rod along the axial direction of the connecting rod, and the side of the connecting part away from the connecting rod is in the form of an arc structure.

[0010] According to some embodiments of the present application, the connecting part is provided with a guide surface at the end away from the thermal expansion valve.

[0011] According to some embodiments of the present application, the connecting rod is provided with a connecting hole extending along the axial direction of the connecting rod at the end close to the thermal expansion valve, the side wall of the connecting hole is provided with a first thread, the thermal expansion valve is provided with a connecting part at one end of the gas passage, the side wall of the connecting part is provided with a second thread, and the connecting rod and the connecting part are connected through the first thread and the second thread.

[0012] According to some embodiments of the present application, the gas passage is provided with a stepped part, and the valve plate is used to adhere to or separate from the stepped part to close or open the gas passage.

[0013] According to some embodiments of the present application, the valve body is provided with a valve core cavity, the valve core cavity is rotatably provided with a valve core, the valve core is used to make the valve core cavity communicate with or disconnect from the gas passage, the valve body is provided with a linkage mechanism, and the linkage mechanism is used to make the valve core link with the valve rod.

[0014] According to some embodiments of the present application, the linkage mechanism comprises a driving gear and a driven gear which are engaged with each other, the driving gear is connected with the valve rod, and the driven gear is connected with the valve core.

[0015] The gas appliance according to the second aspect of the present application comprises the gas valve according to any one of the above.

[0016] The gas appliance according to the present application has at least the following beneficial effects: the connecting rod of the gas valve of the gas appliance of the present application is matched with the valve rod member by the first tooth portion and the second tooth portion, so that the connecting rod can rotate with the valve rod member and can move along the axial direction of the valve rod member, the matching structure between the connecting rod and the valve rod is diversified, and the matching structure of the tooth portion can also make the connecting rod move along the axial direction of the valve rod member smoothly, thereby guaranteeing the accurate control of the gas output and the combustion temperature of the gas valve, and improving the user experience.

[0017] Additional aspects and advantages of the present application will be given in part in the following description, become apparent from the following description, or be understood by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0018] The present application will be further described below in conjunction with the drawings and embodiments, wherein:

[0019] Figure 1 A perspective view of the gas valve according to an embodiment of the present application;

[0020] Figure 2 A perspective view of the gas valve according to an embodiment of the present application; Figure 1 A partial exploded view of the gas valve according to the embodiment shown;

[0021] Figure 3 A perspective view of the gas valve according to an embodiment of the present application; Figure 2 An enlarged view of A in FIG. 5;

[0022] Figure 4 A sectional view of the gas valve according to an embodiment of the present application;

[0023] Figure 5 A structural schematic view of the connecting rod and the valve rod member of the gas valve according to an embodiment of the present application;

[0024] Figure 6 A perspective view of the gas valve according to an embodiment of the present application; Figure 5 An enlarged view of B in FIG. 6;

[0025] Figure 7 A partial exploded view of the gas valve according to an embodiment of the present application from another view direction;

[0026] Figure 8 A perspective view of the valve cover of the valve body of the gas valve according to an embodiment of the present application.

[0027] REFERENCE SIGNS:

[0028] Valve body 10, gas passage 11, valve cover 12, valve seat 13, stepped portion 14, valve core cavity 15, valve core 16, driving gear 17, driven gear 18;

[0029] Ignition switch seat 20, mounting groove 21, limiting portion 211, avoiding portion 22, fastener 23;

[0030] Ignition switch assembly 30, piezoelectric igniter 31, impact piece 32, spring 33, default portion 34, spring sheet 35;

[0031] Valve stem assembly 40, valve stem piece 41, circular hole 411, first tooth portion 412, positioning platform 413, poking piece 42, positioning spring 43, positioning piece 44;

[0032] Cover body 50, bending portion 51, buckle hole 52;

[0033] Thermal expansion valve 60, connecting rod 61, connecting portion 611, second tooth portion 612, lead-in surface 613, connecting hole 614, valve piece 62, connecting piece 63. DETAILED DESCRIPTION

[0034] The embodiments of the present application will be described in detail below with reference to the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary only, and are merely intended to explain the present application, and should not be understood as a limitation of the present application.

[0035] In the description of the present application, it should be understood that the orientation description, such as the left, right, etc. The orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as a limitation of the present application.

[0036] In the description of the present application, if there is a description of first, second, only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the order of indicated technical features.

[0037] In the description of the present application, unless otherwise explicitly limited, the words such as setting, mounting, connecting, etc. Should be understood in a broad sense, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0038] The gas valve of the first aspect embodiment of the present application comprises a valve body 10, a valve stem assembly 40 and a temperature control device.

[0039] Specifically, with reference toFigure 1 、 Figure 4 、 Figure 5 、 Figure 6 The valve body 10 comprises a valve cover 12 and a valve seat 13, the valve cover 12 is fixedly connected with the valve seat 13 through a fixing member, and the valve body 10 is provided with a gas passage 11.

[0040] The valve rod assembly 40 comprises a valve rod member 41, the valve rod member 41 is rotatably arranged in the valve body 10 and partially located in the gas passage 11, the valve rod member 41 can move along the axial direction thereof relative to the valve body 10, and the valve rod member 41 is provided with a first tooth portion 412 around the rotation axis thereof at one end of the gas passage 11; the temperature control device comprises a thermal expansion valve 60 and a connecting rod 61, the thermal expansion valve 60 is partially located in the gas passage 11, the connecting rod 61 is located in the gas passage 11, the connecting rod 61 is provided with a valve piece 62, the valve piece 62 is used for opening or closing the gas passage 11, one end of the connecting rod 61 is threadedly connected with one end of the thermal expansion valve 60, and the other end of the connecting rod 61 is provided with a second tooth portion 612, wherein the first tooth portion 412 and the second tooth portion 612 are engaged, so that the connecting rod 61 can rotate with the valve rod member 41 and can move along the axial direction of the valve rod member 41.

[0041] When the combustion temperature of the gas appliance using the gas valve is increased and exceeds the set temperature of the thermal expansion valve 60, the liquid in the temperature sensing bag of the thermal expansion valve 60 expands to generate pressure, the pressure acts on the valve piece 62, so that the valve piece 62 moves in the gas passage 11, since the valve piece 62 is arranged on the connecting rod 61, the connecting rod 61 can move along the axial direction of the valve rod member 41, and since the first tooth portion 412 and the second tooth portion 612 are in the engaged state, the movement of the valve piece 62 in the gas passage 11 can drive the connecting rod 61 to move along the axial direction of the valve rod member 41, thereby reducing the opening degree of the gas passage 11 and reducing the flow rate of the gas flowing through the valve piece 62, so as to reduce the combustion temperature of the gas appliance to the set temperature; conversely, when the combustion temperature of the gas appliance is reduced, the thermal expansion valve 60 can move the valve piece 62 in the opposite direction, increase the opening degree of the gas passage 11, increase the flow rate of the gas flowing through the valve piece 62, and increase the combustion temperature of the gas appliance to the set temperature.

[0042] Therefore, the cooperation structure of the first tooth portion 412 and the second tooth portion 612 between the connecting rod 61 and the valve rod member 41 can make the connecting rod 61 rotate with the valve rod member 41 and move along the axial direction of the valve rod member 41, expand the cooperation structure of the connecting rod 61 and the valve rod member 41, diversify the cooperation structure between the connecting rod 61 and the valve rod, and adopt the cooperation structure of the tooth portion engagement, which can avoid the jamming phenomenon between the connecting rod 61 and the valve rod member 41, make the connecting rod 61 move along the axial direction of the valve rod member 41 smoothly, and thus guarantee the accurate control of the gas output and the combustion temperature of the gas valve.

[0043] Referring toFigure 4 、 Figure 5 、 Figure 6 In some embodiments, the valve rod 41 is provided with a circular hole 411 extending in the axial direction, the connecting rod 61 is provided with a connecting portion 611 extending in the radial direction of the connecting rod 61, the first tooth portion 412 is arranged along the circumferential direction of the side wall of the circular hole 411, and the second tooth portion 612 is arranged on the side of the connecting portion 611 away from the connecting rod 61, and the connecting portion 611 is inserted into the circular hole 411 so that the first tooth portion 412 and the second tooth portion 612 are engaged.

[0044] As shown in Figure 6 , in the present embodiment, the connecting portion 611 is in an annular structure, and the second tooth portion 612 is arranged along the circumferential direction of the connecting portion 611.

[0045] Therefore, by arranging the first tooth portion 412 along the circumferential direction of the side wall of the circular hole 411 and arranging the second tooth portion 612 along the circumferential direction of the side wall of the connecting portion 611 away from the connecting rod 61, the concentricity of the first tooth portion 412 and the second tooth portion 612 during machining can be improved, so that the valve rod 41 will not be blocked due to excessive eccentricity of the connecting rod 61 during rotation, and the gas valve can be smoothly opened. Moreover, since the concentricity of the first tooth portion 412 and the second tooth portion 612 during machining is improved, the concentricity of the assembly between the connecting rod 61 and the valve rod 41 is also improved. When the temperature control device generates a temperature control action, the connecting rod 61 moves along the axial direction of the valve rod 41 more smoothly, and the phenomenon of jamming between the connecting rod 61 and the valve rod 41 is avoided, thereby ensuring that the control of the gas output and the combustion temperature of the gas valve is more accurate.

[0046] It can be understood that, in some embodiments, the circular hole 411 can be arranged at the end of the connecting rod 61, and correspondingly, the connecting portion 611 is arranged on the valve rod 41, and the same concept of the present application can also be achieved, which will not be described in detail here.

[0047] Referring to Figure 6 , the teeth of the first tooth portion 412 are arranged in multiple, and the multiple teeth of the first tooth portion 412 are arranged at intervals along the side wall of the circular hole 411. Correspondingly, the teeth of the second tooth portion 612 are arranged in multiple, and the multiple teeth of the second tooth portion 612 are arranged at intervals along the circumferential direction of the side wall of the connecting portion 611 away from the connecting rod 61. Therefore, when the connecting rod 61 and the valve rod 41 are assembled, the connecting rod 61 can be inserted into the circular hole 411 in multiple directions, thereby facilitating the assembly of the connecting rod 61 and the valve rod 41.

[0048] It should be noted that the number of teeth of the first tooth portion 412 and the number of teeth of the second tooth portion 612 can be arranged according to specific conditions. The more the corresponding number of teeth of the first tooth portion 412 and the second tooth portion 612, the more the assembly directions between the connecting rod 61 and the valve rod, and the more convenient the assembly between the valve rod 41 and the connecting rod 61.

[0049] Referring to Figure 4 , Figure 6 In some embodiments, the connecting portion 611 is arc-shaped in cross section away from the connecting rod 61 along the axial direction of the connecting rod 61, that is, the connecting portion 611 is arc-shaped in cross section away from the connecting rod 61 along the axial direction of the connecting rod 61, the distance from the two ends of the arc-shaped portion to the connecting rod 61 is less than the distance from the middle of the arc-shaped portion to the connecting rod 61, and the teeth of the second tooth portion 612 are arranged on the arc-shaped portion, so that the top of the teeth is arc-shaped, thereby reducing the contact surface of the teeth of the second tooth portion 612 when the teeth of the second tooth portion 612 are engaged with the first tooth portion 412, the machining error of the first tooth portion 412 and the second tooth portion 612 is reduced, the assembly accuracy of the connecting rod 61 and the valve rod 41 is improved, the connecting rod 61 moves along the axial direction of the valve rod 41 more smoothly, and the phenomenon of the connecting rod 61 being stuck with the valve rod 41 is avoided, thereby ensuring that the control of the gas output and the combustion temperature of the gas valve is more accurate.

[0050] Referring to Figure 6 In some embodiments, the connecting portion 611 is provided with a guide surface 613 away from one end of the thermal expansion valve 60, and the guide surface 613 can further improve the assembly efficiency between the connecting rod 61 and the valve rod 41.

[0051] Referring to Figure 4 In some embodiments, the connecting rod 61 is provided with a connecting hole 614 extending along the axial direction of the connecting rod 61 at one end close to the thermal expansion valve 60, the side wall of the connecting hole 614 is provided with a first thread, the thermal expansion valve 60 is provided with a connecting piece 63 at one end of the gas passage 11, the side wall of the connecting piece 63 is provided with a second thread, the connecting rod 61 and the connecting piece 63 are connected through the first thread and the second thread, when the gas valve is opened, the valve rod 41 is rotated, the valve rod 41 drives the connecting rod 61 to rotate synchronously, at the same time, the connecting rod 61 is rotated relative to the connecting piece 63 on the thermal expansion valve 60, since the connecting rod 61 and the connecting piece 63 are connected through threads, when the connecting rod 61 is rotated relative to the connecting piece 63, the connecting rod 61 is simultaneously moved towards the thermal expansion valve 60, so that the valve plate 62 is moved away from the closed position to open the gas passage 11; conversely, when the gas valve is closed, the valve rod 41 is rotated in the opposite direction, the valve rod 41 drives the connecting rod 61 to rotate, the connecting rod 61 is rotated relative to the connecting piece 63 in the opposite direction when the gas valve is opened, and the connecting rod 61 is simultaneously moved away from the thermal expansion valve 60 when the connecting rod 61 is rotated relative to the connecting piece 63 in the opposite direction when the gas valve is opened. The valve plate 62 is moved to the closed position, thereby cutting off the gas passage 11.

[0052] Referring to Figure 4In some embodiments, the gas passage 11 is provided with a stepped portion 14, and the valve plate 62 is used to abut or separate from the stepped portion 14 to close or open the gas passage 11.

[0053] Referring to Figure 4 In some embodiments, the valve body 10 is provided with a valve core cavity 15, and the valve core cavity 15 is rotatably provided with a valve core 16, which is used to communicate or disconnect the valve core cavity 15 and the gas passage 11. The valve body 10 is provided with a linkage mechanism, which is used to link the valve core 16 and the valve rod 41.

[0054] Referring to Figure 4 In this embodiment, the linkage mechanism includes a driving gear 17 and a driven gear 18 that are engaged with each other. The driving gear 17 is connected with the valve rod 41, and the driven gear 18 is connected with the valve core 16. When the gas valve is opened, the valve rod 41 is rotated to drive the driving gear 17 to rotate, and the driving gear 17 drives the driven gear 18 to rotate, so that the valve core 16 is rotated to communicate the valve core cavity 15 and the gas passage 11. When the gas valve is closed, the valve rod 41 is reversely rotated to drive the driving gear 17 to rotate, and the driving gear 17 drives the driven gear 18 to rotate, so that the valve core 16 is rotated to disconnect the valve core cavity 15 and the gas passage 11.

[0055] Referring to Figure 1 , Figure 2 , Figure 4 The valve body 10 is provided with an ignition switch seat 20, which is an integral structure with the valve body 10. The ignition switch seat 20 is integrally formed with the valve body 10, which reduces the assembly process of assembling the ignition switch seat 20 to the gas valve, reduces the assembly difficulty of the gas valve, and reduces the volume of the gas valve. The ignition switch seat 20 is provided with a mounting groove 21 for mounting a piezoelectric igniter 31, an impact piece 32 and a spring 33 of the switch assembly. The ignition switch assembly 30 includes the piezoelectric igniter 31, the impact piece 32, the spring 33 and an ignition needle. The piezoelectric igniter 31, the impact piece 32 and the spring 33 are sequentially arranged in the mounting groove 21, and the ignition needle is electrically connected with the piezoelectric igniter 31. When the piezoelectric igniter 31 is started, an electric spark can be generated at the ignition needle to ignite the gas flowing out of the gas valve.

[0056] The impact piece 32 is arranged in the mounting groove 21, one end of the spring 33 abuts against the impact piece 32, the other end of the spring 33 abuts against the side wall of the mounting groove 21, and the impact piece 32 can move in the mounting groove 21 in directions away from and close to the piezoelectric igniter 31; when the impact piece 32 moves in the direction away from the piezoelectric igniter 31 under the action of an external force, the impact piece 32 compresses the spring 33, so that the spring 33 generates a thrust force acting on the impact piece 32, thereby providing the impact piece 32 with the power to impact the piezoelectric igniter 31; when the external force applied to the impact piece 32 is removed, the impact piece 32 moves in the direction close to the piezoelectric igniter 31 under the action of the spring 33, and impacts the trigger switch of the piezoelectric igniter 31, so that the piezoelectric igniter 31 is started, thereby generating an electric spark at the ignition needle to ignite the gas flowing out of the gas valve.

[0057] With reference to Figure 1 , Figure 2 , Figure 4 The valve stem assembly 40 further comprises a poking piece 42, the valve stem piece 41 is arranged in the valve body 10 and partially located in the gas passage 11, the valve stem piece 41 can rotate on the valve body 10 along its own axis, and the valve stem piece 41 can also move relative to the valve body 10 along its own axis, the poking piece 42 is arranged on the valve stem piece 41 and can rotate with the valve stem piece 41, and the poking piece 42 can move the impact piece 32 away from the piezoelectric igniter 31 to accumulate power for the spring 33.

[0058] With reference to Figure 2 , Figure 3 In some embodiments, the side wall of the mounting groove 21 is provided with a relief portion 22, and the end of the poking piece 42 away from the valve stem piece 41 can pass through the relief portion 22; when the valve stem piece 41 rotates, the poking piece 42 is driven to rotate synchronously, the end of the poking piece 42 away from the valve stem piece 41 abuts against the end of the impact piece 32, so that the impact piece 32 moves in the mounting groove 21 in the direction away from the piezoelectric igniter 31, the impact piece 32 compresses the spring 33, and when the valve stem piece 41 rotates to a certain position, the poking piece 42 is out of contact with the impact piece 32, the impact piece 32 moves in the direction close to the piezoelectric igniter 31 under the action of the spring 33, and the impact piece 32 impacts the piezoelectric igniter 31 to generate a pulse, thereby causing the ignition needle to generate a spark.

[0059] The cooperation structure of the poking piece 42 abutting against the end of the impact piece 32 can reduce the number of components, simplify the structure of the gas valve, and improve the cooperation precision.

[0060] It should be noted that the relief portion 22 can be a strip-shaped hole arranged on the side wall of the mounting groove 21, or a notch arranged on the upper edge of the mounting groove 21.

[0061] It can be understood that the toggle piece can also be arranged on the impact piece 32, and the toggle piece is arranged on the side of the impact piece 32 in a direction away from the impact piece 32. The toggle piece cooperates with the toggle piece 42 of the valve rod assembly 40, and the impact piece 32 can also be moved in a direction away from the piezoelectric igniter 31, so as to impact the piezoelectric igniter 31 and achieve the purpose of ignition. Here, no limitation is made.

[0062] Referring to Figure 3 In some embodiments, the side of the impact piece 32 towards the valve rod piece 41 is provided with a default portion 34. When the valve rod assembly 40 is returned, the default portion 34 is used to avoid the toggle piece 42, so as to avoid that the impact piece 32 hinders the return of the valve rod assembly 40 when the gas valve is closed.

[0063] Specifically, as Figure 3 shown, the default portion 34 is arranged on the impact piece 32, so that the surface of the impact piece 32 forms an inclined slope. When the valve rod assembly 40 is returned, the end of the toggle piece 42 away from the valve rod piece 41 can smoothly return through the slope.

[0064] Referring to Figure 1 , Figure 2 In some embodiments, the ignition switch seat 20 is provided with a cover body 50. The cover body 50 is buckled on the mounting groove 21. The piezoelectric igniter 31, the impact piece 32 and the spring 33 can be covered in the mounting groove 21 through the cover body 50, so as to protect the piezoelectric igniter 31, the impact piece 32 and the spring 33 through the cover body 50, and also make the overall appearance of the gas valve beautiful.

[0065] Referring to Figure 1 , Figure 2 In some embodiments, one end of the cover body 50 is provided with a bending portion 51. The bending portion 51 is provided with a buckle hole 52. The corresponding side wall of the ignition switch seat 20 is provided with a buckle 23. When the cover body 50 is assembled on the ignition switch seat 20, the buckle 23 on the ignition switch seat 20 is clamped on the buckle hole 52 on the bending portion 51. The end of the cover body 50 away from the bending portion 51 is fixedly connected with the ignition switch seat 20 through a fixing piece. The assembly of the cover body 50 on the ignition switch seat 20 can be realized, so as to simplify the assembly structure of the cover body 50.

[0066] It should be noted that the cover body 50 can also be assembled on the ignition switch seat 20 by using other assembly structures, which will not be described in detail here.

[0067] Referring to Figure 7 , Figure 8 In some embodiments, the opposite two side walls of the mounting groove 21 are provided with limiting portions 211. The mounting position of the piezoelectric igniter 31 is formed between the limiting portions 211 and the side walls of the mounting groove 21. The piezoelectric igniter 31 is limited in the mounting groove 21 through the limiting portions 211 and the side walls of the mounting groove 21.

[0068] With reference to Figure 7 In some embodiments, the end of the piezoelectric igniter 31 is provided with a spring 35, the two ends of the spring 35 abut against the corresponding limiting portions 211 respectively, and the middle portion of the spring 35 abuts against the end of the piezoelectric igniter 31, so as to limit the piezoelectric igniter 31 in the mounting position of the mounting groove 21. A through hole is provided on the spring 35, the trigger switch of the piezoelectric igniter 31 is arranged through the through hole, the trigger switch of the piezoelectric igniter 31 protrudes from the surface of the spring 35 and protrudes from the mounting position, so that the striker 32 can strike the trigger switch of the piezoelectric igniter 31. By arranging the spring 35 between the end of the piezoelectric igniter 31 and the limiting portion 211, the assembly difficulty of the piezoelectric igniter 31 in the mounting groove 21 can be reduced, the assembly of the piezoelectric igniter 31 is facilitated, and the assembly efficiency of the piezoelectric igniter 31 is improved.

[0069] With reference to Figure 7 In some embodiments, the side wall of the valve stem 41 outside the valve body 10 is provided with a positioning platform 413, the positioning platform 413 is arranged along the axial direction of the valve stem 41, and one end of the positioning platform 413 extends to the end face of the valve stem 41. The actuating member 42 is provided with a positioning hole, the shape of the positioning hole matches the cross-sectional shape of the valve stem 41 at the corresponding positioning platform 413, and the valve stem 41 is arranged through the positioning hole, so that the actuating member 42 can rotate with the valve stem 41. By arranging the positioning platform 413 on the side wall of the valve stem 41 outside the valve body 10, and arranging the positioning hole on the actuating member 42 which matches the cross-sectional shape of the valve stem 41 at the positioning platform 413, the assembly structure of the actuating member 42 and the valve stem 41 can be simplified, and the assembly efficiency of the actuating member 42 and the valve stem 41 is improved.

[0070] With reference to Figure 4 , Figure 7 In some embodiments, the valve stem 41 is provided with a positioning spring 43 and a positioning member 44, the positioning member 44 is connected with the valve body 10, one end of the positioning spring 43 abuts against the actuating member 42, and the other end abuts against the positioning member 44, so as to avoid the axial movement of the actuating member 42 on the valve stem 41 during the normal use of the gas valve, so as to ensure that the actuating member 42 can be kept at the position corresponding to the striker 32, and ensure the normal use of the ignition switch assembly 30.

[0071] The gas appliance according to the second aspect of the present application comprises the gas valve according to any one of the above.

[0072] The connecting rod of the gas valve of the gas appliance of the present application is matched with the valve rod member by the first and second tooth engagement structures, so that the connecting rod can rotate with the valve rod member and move along the axial direction of the valve rod member, the matching structure between the connecting rod and the valve rod is diversified, and the matching structure of the tooth engagement can also make the connecting rod move along the axial direction of the valve rod member smoothly, thereby ensuring the accurate control of the gas output and combustion temperature of the gas valve and improving the user experience.

[0073] The technical features of the above-described embodiments can be combined arbitrarily, and to make the description concise, all possible combinations of the technical features in the above-described embodiments are not described, but as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present disclosure.

[0074] Of course, the present application is not limited to the above-described embodiments, and those skilled in the art can make equivalent modifications or replacements without departing from the spirit of the present application, and these equivalent modifications or replacements are all included in the scope defined by the claims of the present application.

Claims

1. A gas valve, characterized in that, include: The valve body is provided with a gas passage. A valve stem assembly, the valve stem assembly including a valve stem member, the valve stem member being rotatably disposed in the valve body and partially located within the gas passage, the valve stem member being movable relative to the valve body along its axial direction, and the valve stem member having a first toothed portion around its axis of rotation at one end located in the gas passage; A temperature control device includes a thermal expansion valve and a connecting rod. The thermal expansion valve is located within the gas passage, and the connecting rod is located within the gas passage. A valve plate is provided on the connecting rod for opening or closing the gas passage. One end of the connecting rod is threadedly connected to one end of the thermal expansion valve, and the other end of the connecting rod is provided with a second tooth. The first tooth and the second tooth mesh so that the connecting rod can rotate with the valve stem and can move along the axial direction of the valve stem; The valve body is provided with an ignition switch seat, which has a mounting groove for mounting an ignition switch assembly. The ignition switch assembly includes a piezoelectric igniter. The two opposite side walls of the mounting groove are provided with limiting parts, and the limiting parts and the side walls of the mounting groove form a mounting position for the piezoelectric igniter. The end of the piezoelectric igniter is provided with a spring, the two ends of which abut against the corresponding limiting parts, and the middle part of the spring abuts against the end of the piezoelectric igniter to limit the piezoelectric igniter within the mounting position of the mounting groove.

2. A gas valve according to claim 1, characterized in that, One of the valve stem and the connecting rod is provided with a circular hole extending axially, and the other is provided with a connecting portion. The connecting portion extends radially along the valve stem or the connecting rod. The first tooth is arranged circumferentially along the sidewall of the circular hole, and the second tooth is provided on the side of the connecting portion away from the valve stem or the connecting rod. The connecting portion is inserted into the circular hole so that the first tooth and the second tooth mesh.

3. A gas valve according to claim 2, characterized in that, The connecting part has a ring structure, and the second tooth is arranged along the circumference of the connecting part.

4. A gas valve according to claim 3, characterized in that, The connecting part is provided on the connecting rod, and along the axial direction of the connecting rod, the side of the connecting part away from the connecting rod has an arc-shaped structure.

5. A gas valve according to any one of claims 2 to 4, characterized in that, The end of the connecting part away from the thermal expansion valve is provided with an inlet surface.

6. A gas valve according to claim 2, characterized in that, The connecting rod has a connecting hole extending axially at one end near the thermal expansion valve. The side wall of the connecting hole has a first thread. The thermal expansion valve has a connector at one end of the gas passage. The side wall of the connector has a second thread. The connecting rod and the connector are connected by the first thread and the second thread.

7. A gas valve according to claim 1, characterized in that, The gas passage is provided with a stepped section, and the valve plate is used to fit onto or separate from the stepped section to close or open the gas passage.

8. A gas valve according to claim 1, characterized in that, The valve body is provided with a valve core cavity, and a valve core is rotatably mounted in the valve core cavity. The valve core is used to connect or disconnect the valve core cavity from the gas passage. The valve body is provided with a linkage mechanism, which is used to link the valve core with the valve stem.

9. A gas valve according to claim 8, characterized in that, The linkage mechanism includes a driving gear and a driven gear that mesh with each other. The driving gear is connected to the valve stem, and the driven gear is connected to the valve core.

10. A gas appliance, characterized in that, Includes a gas valve as described in any one of claims 1 to 9.

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