Air valve unit and air valve

Abstract

The utility model belongs to the technical field of air valves for automobile seats, and particularly relates to an air valve unit and an air valve. The air valve unit comprises a valve body which is internally provided with a public cavity, a first cavity and a second cavity, and the first cavity and the second cavity are located on the same side of the public cavity; an air inlet cavity is formed between the first cavity and the public cavity, and one end of the air inlet cavity is communicated to the outer wall of the valve body. According to the air valve unit, space occupation is reduced in the air port arrangement direction and the valve element arrangement direction, so that compared with other existing electromagnetic valves, the size of the air valve unit can be smaller, and the size of an air valve which is assembled through the air valve unit and can control a plurality of air bags can be smaller in an electromagnetic valve set with the same control capacity.

Description

Technical Field

[0001] The utility model belongs to the technical field of air valves for vehicle seats, and particularly relates to an air valve unit and an air valve. Background Art

[0002] The internal space of vehicle seats is limited, so the air valves used in airbag massage systems are required to be as small as possible in volume.

[0003] In the technical route of air valve miniaturization, there has emerged a new route such as using shape memory alloy wires for switching, but considering reliability factors, the currently mainstream air valves still use electromagnetic switches, that is, solenoid valves.

[0004] Currently, for the problem of how to reduce the space occupied by solenoid valves in vehicle seats, the mainstream approach is to miniaturize the solenoid valves, that is, to focus on reducing the overall volume of the solenoid valves. Since at least three air ports for connecting the air pump, for connecting the airbag, and for exhausting are required to control one airbag, for a single-coil solenoid valve (multi-coil solenoid valves have a larger volume), a valve core can only perform two actions of extending to the farthest and retracting to the nearest. Therefore, for the form of a valve core controlling three air ports, there are those with the traditional three air ports on the same side, but a longer valve core is required to reach the three air ports, and there are also those with the three air ports distributed around the valve core as disclosed in Publication (Announcement) No. CN212098553U. In this case, the valve core does not need to be too long, but the air paths connecting the air ports become longer, and the increased air paths occupy additional space. Summary of the Utility Model

[0005] The purpose of the utility model is to provide an air valve unit and an air valve to solve the technical problem that the existing air valves for vehicle seats are still relatively large in overall volume because only one side's space occupation is considered when arranging the air ports and the valve core, and the other side needs to increase space occupation to match it.

[0006] In order to solve the above technical problems, the utility model provides an air valve unit, comprising: a valve body, in which a common cavity is opened, and a first cavity and a second cavity are located on the same side of the common cavity; an air intake cavity is opened between the first cavity and the common cavity, and one end of the air intake cavity is connected to the outer wall of the valve body; the first cavity is connected to the common cavity through a first air passage, and is connected to the air intake cavity through an air intake passage; an air intake electromagnet, the air intake moving iron core end of which is sealed between the inner wall of the first cavity, and is spaced from the first air passage and the air intake air passage, so as to be able to be opened when the air intake moving iron core is retracted The air intake duct and the first air duct are connected; the air bag air duct, one end of which is connected to the common cavity, and the other end is connected to the outer wall of the valve body; the exhaust cavity is opened on the other side of the common cavity; the second cavity is connected to the common cavity through the second air duct, and is connected to the exhaust cavity through the exhaust air duct; the exhaust electromagnet, the exhaust moving iron core end of which is sealed between the inner wall of the second cavity, and is spaced from the second air duct and the exhaust air duct, so that when the exhaust moving iron core is retracted, the exhaust air duct and the second air duct are connected; the dissipation air duct, one end of which is connected to the exhaust cavity, and the other end is connected to the outer wall of the valve body.

[0007] Furthermore, a first buffer cotton is provided in the common cavity, and the first buffer cotton is located on a passage between the first airway and the airbag airway, and is located on a passage between the second airway and the airbag airway.

[0008] Furthermore, the exhaust cavity is provided with a second buffer cotton, and the second buffer cotton is located on the passage between the exhaust air duct and the dissipation air duct.

[0009] Furthermore, the distance between the two farthest cavity walls in the horizontal direction between the common cavity and the exhaust cavity is adapted to the distance between the two farthest cavity walls in the horizontal direction between the first cavity and the second cavity; the distance between the two farthest cavity walls in the vertical direction between the common cavity and the exhaust cavity is adapted to the distance between the two farthest cavity walls in the vertical direction between the first cavity and the second cavity.

[0010] On the other hand, the utility model also provides an air valve, including: the air valve unit as described above, and the other end of the air intake cavity therein is connected to the outer wall of the valve body; a plurality of air valve units are abutted, and each air intake cavity is connected end to end, the tail end of the last air intake cavity is sealed, and the head end of the first air intake cavity is connected to the air intake assembly.

[0011] Furthermore, the air intake assembly includes: an air intake bin, on the wall of which an air inlet and an air outlet are spaced apart; a convex ring, which is arranged on the inner wall of the air intake bin and places the air inlet in the inner area of ​​the ring; a support, which is arranged on the inner wall of the air intake bin opposite to the convex ring; a sealing rubber pad, which is supported by the support and abuts against the convex ring to separate the air inlet and the air outlet, and is suitable for deforming when air flow is pumped into the air inlet, generating a gap with the convex ring, so that the air inlet and the air outlet are restored to communication; the air outlet is connected to the head end of the first air intake cavity.

[0012] Furthermore, a pressure detection chamber is provided on the intake chamber, and the pressure detection chamber communicates with the inner wall of the intake chamber in the outer ring area of the convex ring; a pressure detection sensor is arranged in the pressure detection chamber. The beneficial effect of the present utility model is that the present utility model aims to solve the technical problem that the existing air valve for automotive seats has a relatively large overall volume because only one party's space occupation is considered when arranging the air port and the valve core, and the other party needs to increase the space occupation to match it. This air valve unit enables the common cavity communicating with the airbag air passage to communicate with the first cavity and the second cavity, the first cavity communicates with the intake cavity, and the second cavity communicates with the exhaust cavity, so as to form an air path in which the first cavity becomes a transfer station from the intake cavity to the airbag air passage when the airbag is inflated, and the second cavity becomes a transfer station from the airbag air passage to the exhaust cavity when the airbag is deflated. Thus, the intake cavity equivalent to the air port for connecting the air pump, the airbag air passage equivalent to the air port for connecting the airbag, and the exhaust cavity equivalent to the air port for exhausting can be located on the same side and be compact, so that while occupying less space, the intake electromagnet in the first cavity and the exhaust electromagnet in the second cavity only need to control the opening and closing of one air passage respectively, and the intake moving iron core of the intake electromagnet and the exhaust moving iron core of the exhaust electromagnet no longer need to reach the three air ports for connecting the air pump, connecting the airbag, and exhausting required for controlling at least one airbag. Therefore, the lengths of the intake moving iron core and the exhaust moving iron core can be shortened to the shortest. So this air valve unit simultaneously realizes that the three air ports for connecting the air pump, connecting the airbag, and exhausting are located on the same side, and the length of the valve core is shortened to the shortest. Therefore, this air valve unit reduces the space occupation in both the arrangement of the air ports and the arrangement of the valve core. Therefore, this air valve unit can be made smaller in volume compared with other existing solenoid valves, and the air valve capable of controlling multiple airbags assembled by this air valve unit can also be made smaller in volume among the solenoid valve groups with the same control ability. Description of the Drawings

[0013] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the specific embodiments or the prior description. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0014] Figure 1 It is a schematic structural diagram of the air valve unit of the present utility model;

[0015] Figure 2 It is a cross-section of the air valve unit of the present utility model Figure 1 ;

[0016] Figure 3Is a cross-section of the air valve unit of the present utility model Figure 2 ;

[0017] Figure 4 Is a cross-section of the air valve unit of the present utility model Figure 3 ;

[0018] Figure 5 Is a cross-section of the air valve of the present utility model Figure 1 ;

[0019] Figure 6 Is a cross-section of the air valve of the present utility model Figure 2 ;

[0020] Figure 7 Is a cross-section of the air valve of the present utility model Figure 3 ;

[0021] In the figure:

[0022] Common cavity 210, first cavity 220, second cavity 230, intake cavity 240, exhaust cavity 250,

[0023] First air passage 310, intake air passage 320, airbag air passage 330, second air passage 340, exhaust air passage 350, dissipation air passage 360,

[0024] Intake electromagnet 410, intake moving iron core end 411, intake moving iron core 412,

[0025] Exhaust electromagnet 510, exhaust moving iron core end 511, exhaust moving iron core 512,

[0026] First buffer cotton 610, second buffer cotton 620,

[0027] Intake assembly 700, intake chamber 710, intake port 711, outlet port 712, convex ring 720, support platform 730, sealing rubber pad 740,

[0028] Air pressure detection chamber 810, air pressure detection sensor 820,

[0029] Sealing ring 910. Specific implementation mode

[0030] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0031] Embodiment

[0032] As Figure 1 shown, the present utility model provides a valve unit, including: a valve body 100, combined with Figure 2 , which has a common cavity 210 formed therein, and a first cavity 220 and a second cavity 230 located on the same side of the common cavity 210; an intake cavity 240 is formed between the first cavity 220 and the common cavity 210, referring to Figure 4 , and one end of the intake cavity 240 leads to the outer wall of the valve body 100 for connecting to a gas source such as an air pump; the first cavity 220 is communicated with the common cavity 210 through a first air passage 310 and is communicated with the intake cavity 240 through an intake air passage 320; an intake electromagnet 410, the intake moving iron core end 411 of which is hermetically arranged between the inner wall of the first cavity 220, in at least one embodiment, as Figure 2 and Figure 3 shown, a sealing ring 910 can be sleeved on the intake moving iron core end 411 to achieve sealing; and it is spaced from both the first air passage 310 and the intake air passage 320, so that when the intake moving iron core 412 retracts, the intake air passage 320 and the first air passage 310 are conducted; an airbag air passage 330, one end of which is communicated with the common cavity 210 and the other end leads to the outer wall of the valve body 100 for connecting to an airbag; an exhaust cavity 250 is formed on the other side of the common cavity 210; the second cavity 230 is communicated with the common cavity 210 through a second air passage 340 and is communicated with the exhaust cavity 250 through an exhaust air passage 350; an exhaust electromagnet 510, the exhaust moving iron core end 511 of which is hermetically arranged between the inner wall of the second cavity 230, in at least one embodiment, as Figure 2 and Figure 3 shown, a sealing ring 910 can be sleeved on the exhaust moving iron core end 511 to achieve sealing; and it is spaced from both the second air passage 340 and the exhaust air passage 350, so that when the exhaust moving iron core 512 retracts, the exhaust air passage 350 and the second air passage 340 are conducted; combined with Figure 1 , a dissipation air passage 360, one end of which is communicated with the exhaust cavity 250 and the other end leads to the outer wall of the valve body 100, in at least one embodiment, the dissipation air passage 360 can be a through hole formed on a side wall of the exhaust cavity 250.

[0033] This air valve unit can form an air path by connecting the common cavity 210 communicating with the airbag airway 330 to the first cavity 220 and the second cavity 230, then connecting the first cavity 220 to the intake cavity 240, and connecting the second cavity 230 to the exhaust cavity 250. When the first cavity 220 is used for inflating the airbag, it becomes a transfer station from the intake cavity 240 to the airbag airway 330. When the second cavity 230 is used for exhausting the airbag, it becomes a transfer station from the airbag airway 330 to the exhaust cavity 250. Thus, the intake cavity 240 equivalent to the air port for connecting the air pump, the airbag airway 330 equivalent to the air port for connecting the airbag, and the exhaust cavity 250 equivalent to the air port for exhausting can be located on the same side and be compact, without useless and space - occupying connecting pipelines. Moreover, because they are cavities, they can be arranged closely, so the space occupied is small. At the same time, in the first cavity 220, the intake electromagnet 410 and in the second cavity 230, the exhaust electromagnet 510 only need to control the opening and closing of one airway respectively. The intake moving iron core 412 of the intake electromagnet 410 and the exhaust moving iron core 512 of the exhaust electromagnet 510 no longer need to reach the three air ports for connecting the air pump, connecting the airbag, and exhausting, which are at least required to control one airbag. Therefore, the lengths of the intake moving iron core 412 and the exhaust moving iron core 512 can be shortened to the shortest. So, this air valve unit simultaneously realizes that the three air ports for connecting the air pump, connecting the airbag, and exhausting are located on the same side, and the length of the valve core is shortened to the shortest. Therefore, this air valve unit reduces the space occupation in both the air port arrangement and the valve core arrangement. Thus, compared with other existing solenoid valves, this air valve unit can be made smaller in volume. The air valve assembled with this air valve unit and capable of controlling multiple airbags can also be made smaller in volume among the solenoid valve groups with the same control ability.

[0034] Combined with Figure 2 and Figure 3 , in at least one embodiment, a first buffer cotton 610 is provided in the common cavity 210. The first buffer cotton 610 is located on the passage between the first airway 310 and the airbag airway 330, and on the passage between the second airway 340 and the airbag airway 330, for slowing down the gas, on the one hand, reducing the noise generated when entering the common cavity 210. On the other hand, combined with Figure 2 and Figure 3, in at least one embodiment, the exhaust cavity 250 is also provided with a second buffer cotton 620. The second buffer cotton 620 is located on the passage of the exhaust air duct 350 and the dissipation air duct 360. A plurality of dissipation air ducts 360 can be opened. Through the successive slowdown of the first buffer cotton 610 and the second buffer cotton 620, when exhausting, the gas flow rate entering the exhaust cavity 250 has been sufficiently slowed down. When discharging from the dissipation air duct 360, it is a relatively natural dissipation method. Therefore, there is no need to set a special exhaust nozzle on the exhaust cavity 250, and the space occupation in terms of the exhaust nozzle is also reduced.

[0035] As Figure 2 shown, the distance between the two farthest cavity walls of the common cavity 210 and the exhaust cavity 250 in the horizontal direction is adapted to the distance between the two farthest cavity walls of the first cavity 220 and the second cavity 230 in the horizontal direction; the distance between the two farthest cavity walls of the common cavity 210 and the exhaust cavity 250 in the vertical direction is adapted to the distance between the two farthest cavity walls of the first cavity 220 and the second cavity 230 in the vertical direction. The distance between the two farthest cavity walls of the first cavity 220 and the second cavity 230 in the horizontal direction and the distance between the two farthest cavity walls in the vertical direction are determined according to the sizes of the intake electromagnet 410 and the exhaust electromagnet 510. In at least one embodiment, as Figure 2 shown, the parts of the intake electromagnet 410 and the exhaust electromagnet 510 after the intake moving iron core end 411 and the exhaust moving iron core end 511 can be abutted and arranged, and there can be no partition or gap in the middle. Therefore, through the gas path part formed by the common cavity 210, the exhaust cavity 250, the first cavity 220, the second cavity 230, the first air duct 310, the intake air duct 320, the airbag air duct 330, the second air duct 340, the exhaust air duct 350, and the dissipation air duct 360, by making the width and height only reach the width and height of the two electromagnets (the intake electromagnet 410 and the exhaust electromagnet 510), and the longitudinal length of the gas path part only needs to meet the air flow rate of the airbag used for massage in the car seat. Therefore, the volume of the gas path part can be made very small.

[0036] When the air valve unit is in use, as Figure 4 shown, one end of the intake cavity 240 leading to the outer wall of the valve body 100 is connected to a gas source such as an air pump, and the connection method can be, for example, in the form of a trachea inserted into the intake cavity 240. When the air pump is turned on, the intake cavity 240 is filled with gas, and the part of the first cavity 220 before sealing between the intake moving iron core end 411 and the inner wall of the first cavity 220, that is, the part before the sealing ring 910, is also filled with gas. After that, as Figure 2As shown, the intake electromagnet 410 retracts the intake moving iron core 412 that originally blocked the first air passage 310, so that the intake air passage 320 and the first air passage 310 are connected, and the gas enters the common cavity 210. At this time, the exhaust moving iron core 512 of the exhaust electromagnet 510 blocks the second air passage 340, and the gas can only enter the airbag through the airbag air passage 330, and the airbag is inflated.

[0037] When the airbag needs to be exhausted, the air intake moving iron core 412 blocks the first air passage 310 again, and the exhaust moving iron core 512 of the exhaust electromagnet 510 is retracted, so that the exhaust air passage 350 and the second air passage 340 are connected, and the gas in the airbag can enter the exhaust cavity 250 through the airbag air passage 330, the common cavity 210, the second air passage 340, and the exhaust air passage 350. Figure 1 As shown, it dissipates through the dissipation airway 360.

[0038] In at least one embodiment, a gas valve is further provided, comprising: the gas valve unit as described above, such as Figure 4 As shown, the other end of the air inlet cavity 240 is connected to the outer wall of the valve body 100; a plurality of air valve units are abutted, and each air inlet cavity 240 is connected end to end, as shown Figure 4 As shown in the enlarged portion, the tail end of the last air intake cavity 240 is sealed, and the head end of the first air intake cavity 240 is connected to the air intake assembly 700.

[0039] The air valve unit reduces space occupation by arranging both the air port and the valve core, making it smaller in size than other existing solenoid valves. The air valve assembled from the air valve unit that can control multiple air bags can also be smaller in size among solenoid valve groups with the same control capability.

[0040] like Figure 6 As shown, the air intake assembly 700 may include: an air intake bin 710, combined with Figure 5 , an air inlet 711 and an air outlet 712 are provided on the wall of the air inlet bin 710, and in at least one embodiment, the air outlet 712 is provided on the side wall of the air inlet bin 710, and the air inlet 711 is provided on the top wall of the air inlet bin 710; a convex ring 720 is provided on the inner wall of the air inlet bin 710, and the air inlet 711 is placed in the inner area of ​​the ring; a support platform 730 is provided on the inner wall of the air inlet bin 710 opposite to the convex ring 720; a sealing rubber pad 740 is supported by the support platform 730 and abuts against the convex ring 720 to separate the air inlet 711 and the air outlet 712, and is suitable for deforming when air flow is pumped into the air inlet 711, generating a gap with the convex ring 720, so that the air inlet 711 and the air outlet 712 are restored to be connected, thereby achieving a one-way conduction effect; combined with Figure 7 The air outlet 712 is connected to the first end of the first air inlet cavity 240.

[0041] As shown Figure 6 in the figure, a pressure detection chamber 810 may be provided on the intake air chamber 710, and the pressure detection chamber 810 communicates with the inner wall of the intake air chamber 710 in the outer ring area of the convex ring 720; a pressure detection sensor 820 is disposed in the pressure detection chamber 810 for detecting the pressure of the input gas.

[0042] When this air valve is in use, the air inlet 711 is connected to an air source such as an air pump. When the air pump is started, the gas enters the intake air chamber 710 through the gap generated by the sealing rubber pad 740 and the convex ring 720, and then can enter and fill the intake cavity 240 through the air outlet 712. During this period, the pressure detection sensor 820 can detect the pressure of the input gas. The process of inflating the airbag has been described in the usage part of the air valve unit. Based on the air valve unit, due to the one-way conduction of the sealing rubber pad 740, the airbag can be kept inflated when the air pump stops. The process of the airbag exhausting has also been described in the usage part of the air valve unit.

[0043] In summary, for the air valve unit and the air valve provided by the present utility model, by making the common cavity 210 communicating with the airbag air passage 330 communicate with the first cavity 220 and the second cavity 230 again, the first cavity 220 communicates with the intake cavity 240 again, and the second cavity 230 communicates with the exhaust cavity 250 again, an air path can be formed such that when the first cavity 220 is for inflating the airbag, the intake cavity 240 serves as a transfer station to the airbag air passage 330, and when the second cavity 230 is for exhausting the airbag, the airbag air passage 330 serves as a transfer station to the exhaust cavity 250. Thus, the intake cavity 240 equivalent to the air port for connecting the air pump, the airbag air passage 330 equivalent to the air port for connecting the airbag, and the exhaust cavity 250 equivalent to the air port for exhausting can be located on the same side and be compact. While occupying less space, the intake electromagnet 410 in the first cavity 220 and the exhaust electromagnet 510 in the second cavity 230 each only need to control the opening and closing of one air passage. The intake moving iron core 412 of the intake electromagnet 410 and the exhaust moving iron core 512 of the exhaust electromagnet 510 no longer need to reach the three air ports for connecting the air pump, connecting the airbag, and exhausting required for controlling at least one airbag. Therefore, the lengths of the intake moving iron core 412 and the exhaust moving iron core 512 can be shortened to the shortest. So this air valve unit simultaneously realizes that the three air ports for connecting the air pump, connecting the airbag, and exhausting are located on the same side, and the length of the valve core is shortened to the shortest. Therefore, this air valve unit reduces the space occupation in both the air port arrangement and the valve core arrangement. Therefore, this air valve unit can be made smaller in volume compared with other existing solenoid valves. The air valve assembled by this air valve unit and capable of controlling multiple airbags can also be made smaller in volume among the solenoid valve groups with the same control ability.

[0044] In the embodiments provided in the present application, it should be understood that the disclosed systems and devices can be implemented in other ways. The embodiments described above are merely illustrative. For example, the division of the mechanisms is only a logical functional division, and there may be other division methods in actual implementation. For another example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed.

[0045] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0046] Based on the above inspiration from the ideal embodiments of the present invention, through the above description, those skilled in the art can make various changes and modifications completely within the scope of the technical idea of the present invention. The technical scope of the present invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A gas valve unit, characterized in that: include: A valve body (100) having a common cavity (210) formed therein, and a first cavity (220) and a second cavity (230) located on the same side of the common cavity (210); An air inlet cavity (240) is provided between the first cavity (220) and the common cavity (210), and one end of the air inlet cavity (240) is connected to the outer wall of the valve body (100); The first cavity (220) is in communication with the common cavity (210) via a first air passage (310), and is in communication with the air inlet cavity (240) via an air inlet passage (320); An air intake electromagnet (410), wherein an air intake moving iron core end (411) is sealed between the inner wall of the first cavity (220), and is spaced apart from both the first air passage (310) and the air intake passage (320), so that when the air intake moving iron core (412) is retracted, the air intake passage (320) and the first air passage (310) are connected; An airbag airway (330), one end of which is connected to the common cavity (210) and the other end of which is connected to the outer wall of the valve body (100); An exhaust cavity (250) is opened on the other side of the common cavity (210); The second cavity (230) is in communication with the common cavity (210) via a second air passage (340), and is in communication with the exhaust cavity (250) via an exhaust air passage (350); An exhaust electromagnet (510), wherein an exhaust moving iron core end (511) is sealed between the inner wall of the second cavity (230), and is spaced apart from both the second air passage (340) and the exhaust air passage (350), so that when the exhaust moving iron core (512) is retracted, the exhaust air passage (350) and the second air passage (340) are connected; The dissipation air passage (360) has one end connected to the exhaust cavity (250) and the other end connected to the outer wall of the valve body (100).

2. The gas valve unit according to claim 1, characterized in that: A first buffer cotton (610) is provided in the common cavity (210), and the first buffer cotton (610) is located on the passage between the first airway (310) and the airbag airway (330), and is also located on the passage between the second airway (340) and the airbag airway (330).

3. The gas valve unit according to claim 2, characterized in that: The exhaust cavity (250) is provided with a second buffer cotton (620), and the second buffer cotton (620) is located on the passage between the exhaust air duct (350) and the dissipation air duct (360).

4. The gas valve unit according to claim 1, characterized in that: The distance between the two farthest cavity walls of the common cavity (210) and the exhaust cavity (250) in the horizontal direction is adapted to the distance between the two farthest cavity walls of the first cavity (220) and the second cavity (230) in the horizontal direction; The distance between the two most distant cavity walls of the common cavity (210) and the exhaust cavity (250) in the vertical direction matches the distance between the two most distant cavity walls of the first cavity (220) and the second cavity (230) in the vertical direction.

5. A gas valve, characterized in that: include: The air valve unit according to any one of claims 1 to 4, wherein the other end of the air inlet cavity (240) is connected to the outer wall of the valve body (100); A plurality of air valve units are abutted against each other, and each air intake cavity (240) is connected end to end, the tail end of the last air intake cavity (240) is sealed, and the head end of the first air intake cavity (240) is connected to the air intake assembly (700).

6. The gas valve according to claim 5, characterized in that The air intake assembly (700) comprises: An air inlet bin (710) having an air inlet (711) and an air outlet (712) spaced apart from each other on its wall; A convex ring (720) is arranged on the inner wall of the air inlet bin (710), and the air inlet (711) is located in the inner area of ​​the ring; A support platform (730) is arranged on the inner wall of the air inlet bin (710) opposite to the convex ring (720); A sealing rubber pad (740) supported by the support platform (730) and abutting against the convex ring (720) to separate the air inlet (711) and the air outlet (712), and adapted to deform when air is pumped into the air inlet (711) to form a gap with the convex ring (720) so that the air inlet (711) and the air outlet (712) are restored to communication; The air outlet (712) is in communication with the first end of the first air inlet cavity (240).

7. The gas valve according to claim 6, characterized in that The air intake bin (710) is provided with an air pressure detection bin (810), and the air pressure detection bin (810) is in communication with the inner wall of the air intake bin (710) in the outer region of the convex ring (720); An air pressure detection sensor (820) is arranged in the air pressure detection chamber (810).

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