Mechanical air-gas linkage regulating valve

Abstract

According to the technical scheme, the mechanical air-gas linkage adjusting valve is characterized in that the mechanical air-gas linkage adjusting valve comprises a gas valve pipeline assembly and an air inlet pipeline assembly, the gas valve pipeline assembly comprises a gas pipeline body, a spherical valve is arranged in the gas pipeline body, and a first connecting rotating shaft and a second connecting rotating shaft are arranged at the two ends of the spherical valve respectively; a handle fixing part is fixedly installed at the tail end of the first connecting rotating shaft, the air inlet pipeline assembly comprises an air inlet pipeline shell, a plurality of air inlet channels are formed in one end of the air inlet pipeline shell, an air outlet fixedly connected with a stove fan is formed in the other end of the air inlet pipeline shell, and air blocking pieces are rotatably arranged in the air inlet channels. A semi-ball valve which is in linkage adjustment with the spherical valve is arranged in the air inlet pipeline shell, and a ventilation opening is formed in the semi-ball valve. The spherical valve and the semi-ball valve rotate synchronously and are adjusted in a linkage mode according to the air-fuel ratio, the adjustment process of the fire of the cooking range can be simplified, and the fire of the cooking range can be changed without delay.

Description

Technical field

[0001] The utility model relates to the technical field of gas valves, in particular to a mechanical air-gas linkage regulating valve. [Background Technology]

[0002] In the structure of a commercial gas stove, the mixing ratio of air and gas is very critical. If there is too little air, the gas will not burn completely. If there is too much air, the stove firepower will not meet the requirements and the flame will be easily blown out. Therefore, when adjusting the stove firepower, it is necessary to control the mixing ratio of the air intake and the wind intake in advance.

[0003] However, the size of the air inlet channel of the existing stove fan is fixed, and the air inlet efficiency cannot be changed. The air inlet volume of the stove fan is only related to the rotation speed. The air inlet volume can only be adjusted by changing the rotation speed, and then matching the gas valve to adjust the gas volume to match the air-fuel ratio, and finally feedback to adjust the size of the stove firepower. This method needs to meet the matching of the pipeline diameter and the stove model, is easily interfered, and has poor applicability. In addition, the feedback adjustment process of the stove firepower is complicated, the adjustment delay is long, and it is also necessary to design a complex stove fan control circuit, which has a high production cost.

[0004] In order to solve the above-mentioned defects, the utility model provides a mechanical air-gas linkage regulating valve. [Utility Model Content]

[0005] In order to enhance the applicability and compatibility of stove fans, adjust the air-fuel ratio by changing the air intake efficiency, and simplify the control of stove firepower by mechanical linkage adjustment, the utility model provides a mechanical air-gas linkage regulating valve.

[0006] In order to solve the above problems, the present invention provides the following technical solutions:

[0007] 18. The ventilator as claimed in claim 17, wherein the air inlet pipe is connected to the air inlet pipe by a connecting rod and a connecting rod of the connecting rod. The connecting rod has a first end connected to the air inlet pipe by a connecting rod and a second end connected to the air inlet pipe by a connecting rod. The connecting rod has a first end connected to the air inlet pipe by a connecting rod and a second end connected to the air inlet pipe by a connecting rod.

[0008] The linkage regulating valve as described above is characterized in that: a resistance plate is rotatably provided on the first connecting shaft and located on one side of the handle fixing member, a slide groove is provided on the resistance plate, a spring wave ball for sliding into the slide groove is provided on the gas pipeline body and located on one side of the resistance plate, a positioning card point for limiting the handle off position is provided in the slide groove, a first positioning tooth ring is provided on the handle fixing member, and a second positioning tooth ring that meshes with the first positioning tooth ring is provided on the resistance plate.

[0009] The linked regulating valve as described above is characterized in that: a limit plate that rotates synchronously with the first connecting shaft is provided on the first connecting shaft and located on one side of the resistance plate, a limit baffle is provided on the limit plate, a limit protrusion for blocking the limit baffle is correspondingly provided on the gas pipeline body, and a sealing cover plate fixedly installed on the gas pipeline body is provided on the first connecting shaft and located on one side of the limit plate.

[0010] The linked regulating valve as described above is characterized in that: an air inlet port is provided at one end of the gas pipeline body, and a sealing end cover is provided at the other end; a first gas port for outputting gas is provided on the sealing end cover; a second gas port for inputting gas is provided on the end of the air inlet pipeline shell close to the air outlet; the first gas port and the second gas port are sealed and connected by a hose.

[0011] The linkage regulating valve as described above is characterized in that a solenoid valve is provided at one end of the gas pipeline body close to the air inlet port, and a touch switch for triggering the solenoid valve is provided below the limit protrusion and on the rotation path of the limit baffle.

[0012] The linked regulating valve as described above is characterized in that: the air inlet channels are of the same size and are arranged side by side, and countersunk holes and positioning slots are respectively provided on the inner wall of the air inlet duct shell and corresponding to the two ends of the wind shield. A cap that rotates synchronously with the wind shield is rotatably engaged in the countersunk hole, and a connecting slot is provided in the cap. A connecting column for inserting into the connecting slot is provided at one end of the wind shield, and a positioning shaft for inserting into the positioning slot is provided at the other end. An adjustment slot for convenient rotation and adjustment of the inclination angle of the wind shield is provided on the surface of the outermost end of the cap.

[0013] The linked regulating valve as described above is characterized in that: a circle of first positioning teeth for positioning the wind shield to adjust the angle is provided on the cap, a circle of second positioning teeth that are engaged with the first positioning teeth are correspondingly provided on the inner wall of the countersunk hole, and a return spring is provided in the positioning slot for supporting the wind shield so that the first positioning teeth and the second positioning teeth remain engaged.

[0014] The linked regulating valve as described above is characterized in that: a connecting shaft penetrating the air inlet duct shell is provided at one end of the hemispherical valve close to the gas pipeline body, a positioning dial that rotates synchronously with the hemispherical valve is movably provided on the connecting shaft, an indicating connecting disk that rotates synchronously with the spherical valve is provided at the end of the second connecting rotating shaft, a pointer is provided on the outer edge of the indicating connecting disk, a gear convex ring for making the indicating connecting disk rotate synchronously with the positioning dial is provided on the positioning dial, and a gear ring that meshes with the gear convex ring is provided on the indicating connecting disk.

[0015] The linkage regulating valve as described above is characterized in that: fixing columns are provided on the outer wall of the air inlet duct shell on the side close to the gas pipeline body and on both sides of the positioning dial, and connecting plates for installing and fixing the gas pipeline body are provided on the fixing columns.

[0016] The linkage regulating valve as described above is characterized in that a connecting flange for fixedly connecting to the stove fan is provided on the outer wall of the air inlet duct housing and outside the air outlet.

[0017] Compared with the prior art, the utility model has the following advantages:

[0018] 1. The utility model has a linkage regulating valve with multiple air inlet channels and a rotatable windshield for adjusting the air inlet efficiency in the air inlet channels. The air inlet channels can be set to different sizes and the air inlet channels in different positions correspond to different models of fans and stoves. The air inlet channels can be fine-tuned by rotating the windshield to match the optimal air-fuel ratio. The air inlet channels can also be set to the same size. By rotating the windshield to different angles, the size of the air inlet channel gap can be changed, thereby adjusting the air inlet efficiency to match the gas valve pipeline assembly to achieve the optimal air-fuel ratio adjustment setting. Different air inlet channels correspond to different air inlet efficiencies, so that the stove fan can match different models of stoves, thereby enhancing the applicability and compatibility of the stove fan. When adjusting the stove firepower, the ball valve and the semi-ball valve rotate synchronously and are adjusted in conjunction with the set air-fuel ratio, which simplifies the adjustment process of the stove firepower and can change the size of the stove firepower without delay. At the same time, the linkage regulating valve is also provided with a positioning dial and an indicator connection disk, which can be used for angular positioning when the linkage regulating valve and the gas valve are linked for adjustment, facilitating data matching and achieving the adjustment of the optimal air-fuel ratio.

[0019] 2. The utility model relates to a linkage regulating valve, which is provided with a resistance plate and a slide groove and a positioning card point on the resistance plate. A spring wave ball that slides into the slide groove is correspondingly provided on the main body of the gas pipeline. The resistance plate can be rotated according to the user's usage habits to set the positioning point of the minimum firepower, so that the user will feel a damping feeling when turning the handle to adjust the low firepower to prevent the stove from being accidentally turned off by excessive turning of the handle. At the same time, a solenoid valve and a touch switch are provided. When the handle is turned to make the positioning card point slide over the spring wave ball, the limit baffle on the limit plate will touch the spring piece on the touch switch, causing the solenoid valve to close and block the circulation of gas, thereby effectively preventing gas leakage and improving safety.

Brief Description of the Drawings

[0020] Figure 1 is a three-dimensional diagram of the linkage regulating valve;

[0021] Figure 2 1 is a top view of the linkage regulating valve;

[0022] Figure 3 yes Figure 2 Cross-sectional view in the AA direction;

[0023] Figure 4 This is the exploded view of the linkage control valve;

[0024] Figure 5 This is the first exploded view of the gas valve piping assembly;

[0025] Figure 6 is a second exploded view of the gas valve piping assembly;

[0026] Figure 7 This is the first exploded view of the air inlet duct assembly;

[0027] Figure 8 It is the second exploded view of the air inlet duct assembly;

[0028] Figure 9 This is a schematic diagram of the valve rotation connection of the linkage control valve;

[0029] In the figure: 1 is a gas valve pipeline assembly; 2 is a gas pipeline body; 3 is a ball valve; 4 is a first connecting shaft; 5 is a second connecting shaft; 6 is a handle fixing member; 7 is a resistance plate; 8 is a slide groove; 9 is a positioning point; 10 is a spring wave ball; 11 is a first positioning gear ring; 12 is a second positioning gear ring; 13 is a limiting plate; 14 is a limiting baffle; 15 is a limiting protrusion; 16 is a sealing cover plate; 17 is an air inlet port; 18 is a sealing end cover; 19 is a first gas port;

[0030] 20 is an air inlet duct assembly; 21 is an air inlet duct shell; 22 is an air inlet channel; 23 is an air outlet; 24 is a wind shield; 25 is a semi-ball valve; 26 is a vent; 27 is a second gas port; 28 is a countersunk hole; 29 is a positioning slot; 30 is a cap; 31 is a connecting slot; 32 is a connecting column; 33 is a positioning shaft; 34 is an adjusting slot; 35 is a first positioning tooth; 36 is a second positioning tooth; 37 is a return spring; 38 is a connecting shaft; 39 is a positioning dial; 40 is an indicating connecting disk; 41 is a pointer; 42 is a gear convex ring; 43 is a gear ring; 44 is a fixing column; 45 is a connecting plate; 46 is a connecting flange; 47 is a solenoid valve; 48 is a touch switch. [Specific implementation method]

[0031] The technical features of the present invention are further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can understand. The present invention protects an air-gas linkage regulating valve, and particularly protects its mechanical structure.

[0032] A mechanical air-gas linkage regulating valve, such as Figures 1 to 9As shown, it includes a gas valve pipeline assembly 1 and an air inlet pipeline assembly 20, the gas valve pipeline assembly 1 includes a gas pipeline main body 2, a ball valve 3 is rotatably provided in the gas pipeline main body 2, and a first connecting rotating shaft 4 and a second connecting rotating shaft 5 are respectively provided at both ends of the ball valve 3, which penetrate the gas pipeline main body 2 and are located on the same axis and rotate synchronously with the ball valve 3, and a handle fixing part 6 is fixedly installed at the end of the first connecting rotating shaft 4, the air inlet pipeline assembly 20 includes an air inlet pipeline shell 21, a plurality of air inlet channels 22 are provided at one end of the air inlet pipeline shell 21, an air outlet 23 fixedly connected to the stove fan is provided at the other end of the air inlet pipeline shell 21, a wind shield 24 for adjusting the air inlet efficiency is rotatably provided in the air inlet channel 22, a semi-ball valve 25 rotatably provided in the air inlet pipeline shell 21 for linkage adjustment with the ball valve 3, and a valve corresponding to different air inlets when rotated is provided on the semi-ball valve 25. The vent 26 of the air inlet channel 22; the air inlet channel 22 can be set to different sizes, and the air inlet channels 22 in different positions correspond to different models of fans and stoves, and then the gap of the air inlet channel 22 is fine-tuned by rotating the wind shield 24 to match the optimal air-fuel ratio. The air inlet channels 22 can also be set to the same size, and the gap size of the air inlet channel 22 is changed by rotating the wind shield 24 to different angles, so as to adjust the air intake efficiency to cooperate with the gas valve pipe assembly 1 to achieve the optimal air-fuel ratio adjustment setting. At the same time, different air inlet channels 22 correspond to different air intake efficiencies, so that the stove fan can match different models of stoves, thereby enhancing the applicability and compatibility of the stove fan. Moreover, when adjusting the stove firepower, the ball valve 3 and the semi-ball valve 25 rotate synchronously and are adjusted in conjunction with the set air-fuel ratio, which simplifies the stove firepower adjustment process and can change the stove firepower without delay.

[0033] Specifically, a resistance plate 7 is rotatably provided on the first connecting shaft 4 and located on one side of the handle fixing member 6, a slide groove 8 is provided on the resistance plate 7, a spring wave ball 10 for sliding into the slide groove 8 is provided on the gas pipeline body 2 and located on one side of the resistance plate 7, a positioning card point 9 for limiting the handle off position is provided in the slide groove 8, a first positioning tooth ring 11 is provided on the handle fixing member 6, and a second positioning tooth ring 12 is provided on the resistance plate 7 that meshes with the first positioning tooth ring 11; the user can rotate the resistance plate 7 to set the stove according to the usage habit The positioning point of the minimum firepower allows the user to feel a damping sensation when turning the handle to adjust the firepower to a low level, so as to prevent the stove from being accidentally turned off by turning the handle excessively. The handle and the handle fixing member 6 are screwed into the screw hole on the first connecting shaft 4 by long screws for installation and fixation. The handle fixing member 6 and the limiting plate 13 clamp the resistance plate 7 so that the first positioning gear ring 11 and the second positioning gear ring 12 are engaged with each other to position the positioning card point 9. When adjusting the positioning point, it is necessary to loosen the screws so that the first positioning gear ring 11 and the second positioning gear ring 12 are disengaged from each other, and then rotate the resistance plate 7 for adjustment.

[0034] In addition, a limit plate 13 that rotates synchronously with the first connecting shaft 4 is provided on the first connecting shaft 4 and located on one side of the resistance plate 7, a limit baffle 14 is provided on the limit plate 13, and a limit protrusion 15 for blocking the limit baffle 14 is correspondingly provided on the gas pipeline body 2, and a sealing cover plate 16 fixedly installed on the gas pipeline body 2 is provided on the first connecting shaft 4 and located on one side of the limit plate 13. Bearings can be nested on the first connecting shaft 4 to reduce rotational friction. The limit baffle 14 and the limit protrusion 15 limit the rotation angle of the handle to between 0° and 90° to match the structural characteristics of the ball valve 3.

[0035] Specifically, an air inlet port 17 is provided at one end of the gas pipeline body 2, and a sealing end cover 18 is provided at the other end. A first gas port 19 for outputting gas is provided on the sealing end cover 18, and a second gas port 27 for inputting gas is provided on the air inlet duct shell 21 at one end close to the air outlet 23. The first gas port 19 and the second gas port 27 are sealedly connected by a hose. The gas flows into the air inlet duct shell 21 through the first gas port 19 and the second gas port 27 to be preliminarily mixed with the air, and then enters the stove fan from the air outlet 23 to be fully mixed and then output to the stove for combustion.

[0036] In addition, a solenoid valve 47 is provided at one end of the gas pipeline body 2 close to the air inlet port 17, and a touch switch 48 for triggering the solenoid valve 47 is provided below the limiting protrusion 15 and on the rotation path of the limiting baffle 14. When the handle is turned to make the positioning card point 9 slide over the spring wave ball 10, the limiting baffle 14 on the limiting piece 13 will touch the spring on the touch switch 48, causing the solenoid valve 47 to close and block the circulation of gas, thereby effectively preventing gas leakage and improving safety.

[0037] The cam 32 is provided with a screw thread 324 and a screw thread 336 which is provided at the bottom of the cam 32 so as to allow the cam 32 to rotate in a straight line.

[0038] In addition, a circle of first positioning teeth 35 for positioning the wind shield 24 to adjust the angle is provided on the cap 30, and a circle of second positioning teeth 36 that engage with the first positioning teeth 35 is correspondingly provided on the inner wall of the countersunk hole 28. A return spring 37 is provided in the positioning slot 29 to press against the wind shield 24 so that the first positioning teeth 35 and the second positioning teeth 36 remain engaged. The first positioning teeth 35 and the second positioning teeth 36 are used for positioning the rotation angle of the wind shield 24. When rotating to adjust the inclination angle of the wind shield 24, it is necessary to press the cap 30 first to disengage the first positioning teeth 35 from the second positioning teeth 36, and then rotate the cap 30 to drive the wind shield 24 to rotate. After the adjustment is completed, release the cap 30, and the return spring 37 will push the cap 30 to make the first positioning teeth 35 and the second positioning teeth 36 engage again.

[0039] Specifically, a connecting shaft 38 is provided at one end of the hemispherical valve 25 close to the gas pipeline body 2, which passes through the air inlet duct housing 21. A positioning dial 39 is movably provided on the connecting shaft 38 and rotates synchronously with the hemispherical valve 25. An indicating connecting disk 40 is provided at the end of the second connecting shaft 5 and rotates synchronously with the spherical valve 3. A pointer 41 is provided on the outer edge of the indicating connecting disk 40. A gear convex ring 42 is provided on the positioning dial 39 for making the indicating connecting disk 40 rotate synchronously with the positioning dial 39. A gear ring is provided on the indicating connecting disk 40 and meshes with the gear convex ring 42. 43. The positioning dial 39 and the indicating connecting plate 40 can perform angular positioning of the valve when matching the air-fuel ratio, which is convenient for data recording. When adjusting and setting the optimal air-fuel ratio, it is necessary to set the initial position of the hemispherical valve 25 in advance. At this time, first move the positioning dial 39 backward on the connecting shaft 38 to disengage the gear convex ring 42 from the gear ring 43, and then rotate the positioning dial 39 to drive the hemispherical valve 25 to rotate to the appropriate position. After the adjustment is completed, reset the positioning dial 39 to make the gear convex ring 42 engage with the gear ring 43 again, so that the spherical valve 3 and the hemispherical valve 25 rotate synchronously.

[0040] In addition, fixing columns 44 are provided on the outer wall of the air inlet duct housing 21 close to the gas duct body 2 and on both sides of the positioning dial 39 , and connecting plates 45 for installing and fixing the gas duct body 2 are provided on the fixing columns 44 .

[0041] Specifically, a connecting flange 46 for fixedly connecting to the stove fan is provided on the outer wall of the air inlet duct housing 21 and outside the air outlet 23, so as to facilitate fixed installation of the linkage regulating valve on the stove fan.

[0042] The embodiments described in the present invention are merely descriptions of preferred implementation methods of the present invention and are not limited to the precise structures described above and shown in the accompanying drawings. Various modifications and changes can be made without departing from the scope thereof. Without departing from the design concept of the present invention, various modifications and improvements made to the technical solutions of the present invention by engineers and technicians in this field should fall within the scope of protection of the present invention.

Claims

1. A mechanical air-gas linkage regulating valve, characterized by: The invention comprises a gas valve pipeline assembly (1) and an air inlet pipeline assembly (20), wherein the gas valve pipeline assembly (1) comprises a gas pipeline body (2), a ball valve (3) is rotatably provided in the gas pipeline body (2), a first connecting rotating shaft (4) and a second connecting rotating shaft (5) are respectively provided at both ends of the ball valve (3), which penetrate the gas pipeline body (2) and are located on the same axis and rotate synchronously with the ball valve (3), a handle fixing member (6) is fixedly installed at the end of the first connecting rotating shaft (4), and the air inlet pipeline assembly (20) comprises an air inlet. An air duct housing (21) is provided with a plurality of air inlet channels (22) at one end of the air inlet duct housing (21), an air outlet (23) fixedly connected to a stove fan is provided at the other end of the air inlet duct housing (21), a wind shield (24) for adjusting air inlet efficiency is rotatably provided in the air inlet channel (22), a semi-ball valve (25) for linkage adjustment with the ball valve (3) is rotatably provided in the air inlet duct housing (21), and ventilation ports (26) are provided on the semi-ball valve (25) that respectively correspond to different air inlet channels (22) when the semi-ball valve rotates.

2. The mechanical air-gas linkage regulating valve according to claim 1, characterized in that: A resistance plate (7) is rotatably provided on the first connecting shaft (4) and located on one side of the handle fixing member (6), a slide groove (8) is provided on the resistance plate (7), a spring wave ball (10) for sliding into the slide groove (8) is provided on the gas pipeline body (2) and located on one side of the resistance plate (7), a positioning card point (9) for limiting the handle off position is provided in the slide groove (8), a first positioning tooth ring (11) is provided on the handle fixing member (6), and a second positioning tooth ring (12) meshing with the first positioning tooth ring (11) is provided on the resistance plate (7).

3. The mechanical air-gas linkage regulating valve according to claim 2, characterized in that: A limiting plate (13) is provided on the first connecting shaft (4) and located on one side of the resistance plate (7), and rotates synchronously with the first connecting shaft (4); a limiting baffle (14) is provided on the limiting plate (13); a limiting protrusion (15) for blocking the limiting baffle (14) is correspondingly provided on the gas pipeline body (2); and a sealing cover plate (16) is provided on the first connecting shaft (4) and located on one side of the limiting plate (13), and is fixedly mounted on the gas pipeline body (2).

4. The mechanical air-gas linkage regulating valve according to claim 3, characterized in that: An air inlet port (17) is provided at one end of the gas pipeline body (2), and a sealing end cover (18) is provided at the other end. A first gas port (19) for outputting gas is provided on the sealing end cover (18). A second gas port (27) for inputting gas is provided on one end of the air inlet pipeline housing (21) near the air outlet (23). The first gas port (19) and the second gas port (27) are sealed and connected via a hose.

5. The mechanical air-gas linkage regulating valve according to claim 4, characterized in that: A solenoid valve (47) is provided at one end of the gas pipeline body (2) close to the gas inlet port (17), and a touch switch (48) for triggering the solenoid valve (47) is provided below the limiting protrusion (15) and on the rotation path of the limiting baffle (14).

6. The mechanical air-gas linkage regulating valve according to claim 1, characterized in that: The air inlet channels (22) are of the same size and are arranged side by side. A countersunk hole (28) and a positioning slot (29) are respectively provided on the inner wall of the air inlet duct housing (21) and corresponding to the two ends of the wind shield (24). A cap (30) that rotates synchronously with the wind shield (24) is rotatably engaged in the countersunk hole (28). A connecting slot (31) is provided in the cap (30). A connecting column (32) for inserting into the connecting slot (31) is provided at one end of the wind shield (24), and a positioning shaft (33) for inserting into the positioning slot (29) is provided at the other end. An adjustment slot (34) for conveniently rotating and adjusting the inclination angle of the wind shield (24) is provided on the surface of the outermost end of the cap (30).

7. The mechanical air-gas linkage regulating valve according to claim 6, characterized in that: A circle of first positioning teeth (35) for positioning the windshield (24) to adjust the angle is provided on the cap (30), a circle of second positioning teeth (36) engaged with the first positioning teeth (35) is correspondingly provided on the inner wall of the countersunk hole (28), and a return spring (37) is provided in the positioning slot (29) for resisting the windshield (24) so that the first positioning teeth (35) and the second positioning teeth (36) remain engaged.

8. The mechanical air-gas linkage regulating valve according to claim 1, characterized in that: A connecting shaft (38) passing through the air inlet duct housing (21) is provided at one end of the semi-spherical valve (25) close to the gas pipeline body (2), and a positioning dial (39) is movably provided on the connecting shaft (38) and rotates synchronously with the semi-spherical valve (25). An indicating connecting disk (40) is provided at the end of the second connecting rotating shaft (5) and rotates synchronously with the spherical valve (3). A pointer (41) is provided on the outer edge of the indicating connecting disk (40), and a gear convex ring (42) is provided on the positioning dial (39) for making the indicating connecting disk (40) rotate synchronously with the positioning dial (39). A gear ring (43) is provided on the indicating connecting disk (40) and meshed with the gear convex ring (42).

9. The mechanical air-gas linkage regulating valve according to claim 8, characterized in that: Fixed columns (44) are provided on the outer wall of the air inlet duct housing (21) on the side close to the gas duct body (2) and on both sides of the positioning scale plate (39). Connecting plates (45) for mounting and fixing the gas duct body (2) are provided on the fixed columns (44).

10. The mechanical air-gas linkage regulating valve according to claim 1, characterized in that: A connecting flange (46) for fixedly connecting to a stove fan is provided on the outer wall of the air inlet duct housing (21) and outside the air outlet (23).

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