Gas distribution device and combustion device

Abstract

The utility model belongs to the technical field of combustion, and particularly discloses a gas distribution device and a combustion device. The gas distribution device comprises a gas distribution seat and a gas valve. The gas distribution seat comprises a gas inlet channel, a first gas cavity, a second gas cavity, a first valve cavity and a second valve cavity, a first valve port is formed in the first valve cavity, a second valve port is formed in the second valve cavity, and the first valve port is arranged around the outer side of the second valve cavity; the gas valve comprises an electromagnetic driving mechanism, a first valve element, a second valve element, a first elastic piece and a second elastic piece. The electromagnetic driving mechanism has a first driving state for driving the first valve element to open the first valve port or driving the second valve element to open the second valve port and a second driving state for driving the first valve element to open the first valve port and the second valve element to open the second valve port. According to the gas distribution device, one gas valve can control gas supply of the first gas cavity and the second gas cavity respectively, the structure is simple, implementation is easy, and the operation stability and reliability of the gas distribution device are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to combustion technical field especially, and it relates to a gas distribution device and combustion device. BACKGROUND

[0002] The existing gas water heater and gas wall-hanging stove and other gas water heating equipment realize gas supply and combustion through a plurality of fire bars arranged side by side, and the heat generated by combustion is used to heat water passing through the heat exchanger to meet the supply of hot water.

[0003] To realize the adjustment of combustion load, a gas distribution rod assembly is usually arranged in the gas water heating equipment to realize segmented gas supply to the fire bars. The prior art provides a gas distribution rod assembly, which comprises a gas distribution rod body and a gas valve. The gas distribution rod body is provided with an air inlet channel, a first gas cavity, a second gas cavity and a third gas cavity communicated with the air inlet channel. Each gas cavity is provided with at least one gas outlet. A side channel wall of the air inlet channel is provided with a first communication port communicating with the first gas cavity and a second communication port communicating with the second gas cavity. The gas valve comprises a main valve core controlling the first gas cavity and the second gas cavity to be communicated with the air inlet channel at the same time and a secondary valve core controlling the second gas cavity to be communicated with the air inlet channel. The main valve core is provided with a main plug plugging the first communication port and the second communication port. A valve core cavity and a communication hole communicating the valve core cavity with the air inlet channel are arranged in the main valve core. The valve core cavity and the communication hole are communicated through the secondary communication port. The secondary valve core is slidably arranged in the valve core and connected with a secondary plug. The secondary plug plugs the secondary communication port.

[0004] The gas distribution rod assembly provided by the prior art can realize the on-off control of two gas cavities and the air inlet channel by the gas valve with the main valve core and the secondary valve core, thereby realizing three-stage combustion control. However, since the secondary communication port is arranged in the main valve core, and the secondary valve core and the secondary plug are arranged in the main valve core, the main valve core has a complex structure and high manufacturing cost. Meanwhile, the assembly of the main valve core and the secondary valve core is difficult, which is not conducive to the maintenance of the gas distribution rod assembly. UTILITY MODEL CONTENTS

[0005] One of the technical problems solved by the utility model is to provide a gas distribution device, which can effectively solve the problems of complex structure, high cost and difficult disassembly of the gas valve of the existing gas distribution device.

[0006] The second technical problem solved by the utility model is to provide a combustion device, which can effectively solve the problems of complex structure and high cost of the existing combustion device due to the complex gas distribution structure and high cost.

[0007] The first technical problem is solved by the following technical scheme:

[0008] A gas distribution device comprises:

[0009] The gas distribution seat comprises a gas inlet channel, a first gas cavity, a second gas cavity and a valve mounting cavity, the valve mounting cavity comprises a first valve cavity and a second valve cavity which are communicated along a first direction, a first valve port which communicates the first valve cavity and the first gas cavity is arranged in the first valve cavity, a second valve port which communicates the second gas cavity and the second valve cavity is arranged in the second valve cavity, the first valve port is arranged around the outside of the second valve cavity, the first gas cavity and the second gas cavity are respectively provided with a plurality of corresponding communicated gas outlets, and the first valve cavity and the second valve cavity are both communicated with the gas inlet channel.

[0010] The gas valve comprises an electromagnetic driving mechanism, a first valve core, a second valve core, a first elastic member and a second elastic member, the electromagnetic driving mechanism is mounted on the side of the first valve cavity away from the second valve cavity, the second valve core is slidably inserted into the first valve core along the first direction, the first elastic member promotes the end of the first valve core to block the first valve port, the second elastic member promotes the end of the second valve core to block the second valve port, the electromagnetic driving mechanism has a first driving state of driving the first valve core to open the first valve port or driving the second valve core to open the second valve port, and a second driving state of driving the first valve core to open the first valve port and the second valve core to open the second valve port.

[0011] The gas distribution device has the beneficial effects that: the first valve core opens the first valve port, the second valve core opens the second valve port, the first valve port is opened by the first valve core, the air inlet channel, the first valve cavity, the first valve port and the first gas cavity are sequentially communicated, thereby the gas can be supplied to the gas outlet communicated with the first gas cavity, when the second valve core opens the second valve port, the air inlet channel, the second valve cavity, the second valve port and the second gas cavity are sequentially communicated, thereby the gas can be supplied to the second gas outlet communicated with the second gas cavity, the gas supply of the first gas cavity and the second gas cavity is controlled by one gas valve, thereby the gas distribution function is realized; the second valve cavity is communicated with the first valve cavity in the first direction, the first valve port and the second valve port are arranged on the gas distribution seat, the blocking end of the second valve core is exposed to the first valve core, the machining difficulty of the first valve core is reduced, the assembly of the first valve core and the second valve core is simplified, and the machining and assembly costs of the gas valve are reduced; the first valve cavity and the second valve cavity are communicated with the air inlet channel, the electromagnetic force of the electromagnetic driving mechanism can drive the first valve core to open the first valve port when overcoming the first elastic member, and can drive the second valve core to open the second valve port when overcoming the elastic force of the second elastic member, thereby the first valve port is opened first or the second valve port is opened first by the selection of the first elastic member and the second elastic member, the first elastic member and the second elastic member are selected according to the parameters of the segmented combustion set by the user to improve the adaptability and the applicability of the gas distribution device.

[0012] In one of the embodiments, the cavity bottom protrusion of the first valve cavity is provided with two first sealing ring portions, the two first sealing ring portions are spaced and sleeved, and the inner first sealing ring portion surrounds the second valve cavity, the first valve port is formed between the two first sealing ring portions, the end faces of the two first sealing ring portions form first sealing surfaces, and the first valve core is attached to the first sealing surfaces to block the first valve port.

[0013] And / or, the cavity bottom protrusion of the second valve cavity is provided with a second sealing ring, the second sealing ring surrounds the second valve port, the end face of the second sealing ring forms a second sealing surface, and the second valve core is attached to the second sealing surface to block the second valve port.

[0014] In one of the embodiments, the cavity wall of the first valve cavity is provided with a first communication port, the first communication port is located outside the second valve cavity and the first valve port, the cavity wall of the second valve cavity is provided with a second communication port, the gas distribution seat is provided with an air passage communicating with the air inlet channel, and the first communication port and the second communication port are communicated with the air passage.

[0015] In one of the embodiments, the first valve port and the second valve port are arranged in the first direction, and the first valve port is arranged between the electromagnetic driving mechanism and the second valve port.

[0016] In one of the embodiments, the electromagnetic driving mechanism comprises an electromagnetic body with a central through hole and a fixed iron core arranged inside a first end of the central through hole;

[0017] The first valve core comprises a first valve shaft and a first sealing head arranged at a first end of the first valve shaft, a second end of the first valve shaft is slidably arranged in the central through hole, the first sealing head blocks or opens the first valve port, and the first valve shaft has a mounting through hole extending in the first direction;

[0018] The second valve core comprises a second valve shaft and a second sealing head arranged at a first end of the second valve shaft, the second valve shaft is slidably arranged in the mounting through hole, and the second sealing head is always arranged outside the mounting through hole and can open or block the second valve port.

[0019] In one of the embodiments, a guide ring part is arranged on the hole wall of the mounting through hole, and the guide ring part is in sliding cooperation with the second valve shaft;

[0020] And / or, the first elastic member is arranged between the end surface of the electromagnetic body and the first sealing head, and the second elastic member is arranged between the second end of the second valve shaft and the fixed iron core;

[0021] And / or, the fixed iron core comprises a main body part and an extension part arranged on one end of the main body part, the cross-sectional area of the main body part is larger than that of the extension part, the extension part is arranged in the mounting through hole, and the main body part is arranged outside the mounting through hole.

[0022] In one of the embodiments, the gas distribution seat comprises:

[0023] A gas distribution rod part extends in a second direction, the first gas cavity and the second gas cavity are arranged side by side and spaced apart in the second direction on the gas distribution rod part, the second direction is perpendicular to the first direction, and a plurality of gas outlets are arranged spaced apart in the second direction;

[0024] A communication seat part is arranged on one side of the gas distribution rod part, the communication seat part is provided with an air communication passage communicating the air inlet passage and the valve mounting cavity, a first communication passage communicating the first valve cavity and the first gas cavity, and a second communication passage communicating the first valve cavity and the second gas cavity, and the first valve cavity and the second valve cavity both communicate with the air communication passage;

[0025] A valve seat portion is connected to the side of the connecting seat portion away from the gas distribution rod portion, and the valve seat portion is provided with the valve mounting cavity, and the first connecting channel and the second connecting channel both extend into the valve seat portion;

[0026] An intake pipe is connected to the side of the connecting seat opposite to the air distribution rod and has the intake passage, the intake pipe extending along the first direction.

[0027] In one embodiment, the second gas chamber is disposed directly opposite the valve seat portion in the second direction;

[0028] And / or, the gas distribution seat is provided with a third gas chamber and a gas outlet communicating with the third gas chamber, the third gas chamber being located between the first gas chamber and the second gas chamber and always communicating with the air intake channel.

[0029] In one embodiment, the first connecting channel includes an annular channel portion, a first connecting portion, and a second connecting portion connected in sequence. The annular channel portion is arranged around the second valve cavity and its port forms the first valve port. The first connecting portion extends along the second direction, and the second connecting portion extends along a third direction and communicates with the second gas cavity. The third direction is set at an angle to both the first direction and the second direction.

[0030] And / or, the second communication channel includes a first communication portion extending along the first direction and a second communication portion extending along a third direction, one end of the first communication portion extending into the second valve chamber and the port forming the second valve port, the other end of the first communication portion communicating with the second communication portion, one end of the second communication portion communicating with the second gas chamber and the other end penetrating the gas distribution seat, the third direction being set at an angle to both the first direction and the second direction;

[0031] And / or, the ventilation channel extends along the second direction.

[0032] The second technical problem mentioned above is solved by the following technical solution:

[0033] A combustion device includes a plurality of burners arranged side by side, each burner having an injection port, characterized in that it further includes a gas distribution device as described above, wherein each gas outlet is connected to an injection port of one of the burners.

[0034] Compared with the prior art, the combustion device described in this utility model has the following advantages: by adopting the above-mentioned gas distribution device, the processing and assembly costs of the combustion device can be reduced, the structural complexity of the combustion device can be reduced, and the user experience of the combustion device can be improved. Attached Figure Description

[0035] Figure 1 A schematic diagram of the gas distribution device provided in an embodiment of this utility model from one perspective;

[0036] Figure 2 A cross-sectional view of the gas distribution device provided in this embodiment of the present invention when the gas valve is in the closed state;

[0037] Figure 3 for Figure 2 A magnified view of a section at point I;

[0038] Figure 4 A cross-sectional view of the gas distribution device provided in this embodiment of the present invention when the gas valve is in the first open state;

[0039] Figure 5 A cross-sectional view of a gas distribution device provided in another embodiment of the present invention when the gas valve is in the first open state;

[0040] Figure 6 A cross-sectional view of the gas distribution device with the gas valve in the second open state is provided for an embodiment of this utility model;

[0041] Figure 7 A cross-sectional view of a gas valve provided in an embodiment of this utility model;

[0042] Figure 8 A schematic diagram of the gas distribution device provided in an embodiment of this utility model from another perspective;

[0043] Figure 9 Top view of the gas distribution seat provided in the embodiment of this utility model Figure 1 ;

[0044] Figure 10 for Figure 9 Sectional view along the middle AA direction;

[0045] Figure 11 for Figure 9 Sectional view along the BB direction;

[0046] Figure 12 for Figure 9 A cross-sectional view along the CC direction;

[0047] Figure 13 Top view of the gas distribution seat provided in the embodiment of this utility model Figure 2 ;

[0048] Figure 14 for Figure 13 Sectional view along the DD direction;

[0049] Figure 15 for Figure 13 A cross-sectional view along the EE direction.

[0050] Label Explanation:

[0051] 1. Gas distributor seat; 11. Gas distributor rod; 111. First gas chamber; 112. Second gas chamber; 113. Third gas chamber; 12. Outlet pipe; 121. Gas outlet; 121a. First gas outlet; 121b. Second gas outlet; 121c. Third gas outlet; 13. Inlet pipe; 131. Inlet passage; 1311. First inlet section; 1312. Second inlet section; 14. Valve seat; 141. Valve mounting cavity; 1411. First valve cavity; 1412. Second valve cavity; 413. First connecting port; 1414. Second connecting port; 15. Connecting seat; 151. Ventilation channel; 152. First connecting channel; 1521. Annular channel section; 1522. First channel section; 1523. Second channel section; 1524. First valve port; 153. Second connecting channel; 1531. First connecting part; 1532. Second connecting part; 16. First sealing ring part; 1533. Second valve port; 161. First sealing surface; 17. Second sealing ring; 171. Second sealing surface;

[0052] 2. Gas valve; 21. First valve core; 211. First valve shaft; 2111. Main shaft section; 2112. Mounting ring section; 2113. Mounting through hole; 2114. Guide ring section; 212. First sealing head; 22. Second valve core; 221. Second valve shaft; 222. Second sealing head; 23. Electromagnetic drive mechanism; 231. Coil; 232. Coil bracket; 233. Plastic-encapsulated shell; 234. Magnetic guide frame; 235. Sleeve; 2351. Cylindrical section; 2352. Mounting plate section; 236. Fixed iron core; 2361. Main body section; 2362. Extension section; 237. Magnetic guide plate; 238. Central through hole; 24. First elastic element; 25. Second elastic element; 26. First buffer element; 27. Second buffer element. Detailed Implementation

[0053] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0054] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0055] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0056] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0057] This embodiment provides a gas distribution device that can be applied to the combustion device of a gas-fired water heater to achieve segmented gas supply to the combustion device and meet the segmented combustion requirements of the combustion device.

[0058] like Figures 1 to 10 As shown, in this embodiment, the gas distribution device includes a gas distribution seat 1 and a gas valve 2. The gas distribution seat 1 has an intake channel 131, a first gas chamber 111, a second gas chamber 112, and a valve mounting cavity 141. The valve mounting cavity 141 includes a first valve chamber 1411 and a second valve chamber 1412 communicating along a first direction. The first valve chamber 1411 has a first valve port 1524 communicating with the first gas chamber 111. The second valve chamber 1412 has a second valve port 1533 communicating with the second gas chamber 112. The first valve port 1524 surrounds the outside of the second valve chamber 1412. The first gas chamber 111 and the second gas chamber 112 each have several corresponding and communicating gas outlets 121. Both the first valve chamber 1411 and the second valve chamber 1412 are connected to the intake channel 131.

[0059] The gas valve 2 includes an electromagnetic drive mechanism 23, a first valve core 21, a second valve core 22, a first elastic element 24, and a second elastic element 25. The electromagnetic drive mechanism 23 is installed on the side of the first valve chamber 1411 away from the second valve chamber 1412. The second valve core 22 is slidably inserted into the first valve core 21 along a first direction. The first elastic element 24 causes the end of the first valve core 21 to block the first valve port 1524. The second elastic element 25 causes the end of the second valve core 22 to block the second valve port 1533. The electromagnetic drive mechanism 23 has a first driving state of driving the first valve core 21 to open the first valve port 1524 or driving the second valve core 22 to open the second valve port 1533, and a second driving state of driving the first valve core 21 to open the first valve port 1524 and the second valve core 22 to open the second valve port 1533.

[0060] The gas distribution device provided in this embodiment has a first valve port 1524 and a second valve port 1533 on the gas distribution seat 1. The electromagnetic drive mechanism 23 can drive the first valve core 21 to open the first valve port 1524 and the second valve core 22 to open the second valve port 1533. When the first valve core 21 opens the first valve port 1524, the air intake channel 131, the first valve chamber 1411, the first valve port 1524 and the first gas chamber 111 are connected in sequence, so that gas can be supplied to the gas chamber 111. At the gas outlet 121a, when the second valve core 22 opens the second valve port 1533, the air intake passage 131, the second valve chamber 1412, the second valve port 1533, and the second gas chamber 112 are sequentially connected, so that gas can be supplied to the gas outlet 121 connected to the second gas chamber 112, realizing that one gas valve 2 controls the gas supply to the first gas chamber 111 and the second gas chamber 112, thereby realizing the gas distribution function; since the second valve chamber 1412 and the first valve chamber 1411 are in the first direction The first valve port 1524 and the second valve port 1533 are both located on the gas distribution seat 1, so that the sealing end of the second valve core 22 is exposed outside the first valve core 21. This reduces the processing difficulty of the first valve core 21 and simplifies the assembly of the first valve core 21 and the second valve core 22, thereby reducing the processing and assembly cost of the gas valve 2. Since the first valve chamber 1411 and the second valve chamber 1412 are both connected to the air intake channel 131, the electromagnetic force applied by the electromagnetic drive mechanism 23 can drive the first valve core 21 to open the first valve port 1524 when overcoming the first elastic element 24, and can drive the second valve core 22 to open the second valve port 1533 when overcoming the elastic force of the second elastic element 25. Thus, by selecting the first elastic element 24 and the second elastic element 25, it is possible to control whether the first valve port 1524 is opened first or the second valve port 1533 is opened first. Therefore, the first elastic element 24 and the second elastic element 25 can be selected according to the segmented combustion parameters set by the user to improve adaptability and enhance the applicability of the gas distribution device.

[0061] For ease of description, the gas outlet 121 connected to the first gas chamber 111 is referred to as the first gas outlet 121a, and the gas outlet 121 connected to the second gas chamber 112 is referred to as the second gas outlet 121b. Multiple first gas outlets 121a and multiple second gas outlets 121b are provided, and preferably, the number of first gas outlets 121a and multiple second gas outlets 121b are different. In one embodiment, three first gas outlets 121a and two second gas outlets 121b are provided. In other embodiments, the number of first gas outlets 121a and multiple second gas outlets 121b can be set according to requirements, and this embodiment does not limit this.

[0062] For ease of description, when the first valve core 21 blocks the first valve port 1524 and the second valve core 22 blocks the second valve port 1533, the state of the gas valve 2 is defined as closed. When the electromagnetic drive mechanism 23 is in the first drive state, the state of the gas valve 2 is defined as first open. When the electromagnetic drive mechanism 23 is in the second drive state, the state of the gas valve 2 is defined as second open.

[0063] In one embodiment, such as Figure 4 As shown, when the electromagnetic drive mechanism 23 is in the first driving state, the first valve core 21 blocks the first valve port 1524 and the second valve core 22 opens the second valve port 1533. That is, when the gas valve 2 is in the closed state, the elastic force applied by the first elastic element 24 to the first valve core 21 is greater than the elastic force applied by the second elastic element 25 to the second valve core 22. Therefore, when the electromagnetic drive mechanism 23 is energized, the electromagnetic force generated by the electromagnetic drive mechanism 23 can first overcome the elastic force generated by the second elastic element 25 and cause the second valve core 22 to open the second valve port 1533. When the electromagnetic force of the electromagnetic drive mechanism 23 is further increased, the electromagnetic force can overcome the elastic force of the first elastic element 24 and drive the first valve core 21 to open the first valve port 1524. Since the second valve core 22 is located inside the first valve core 21, the size of the second valve core 22 is relatively smaller than that of the first valve core 21, and the size of the second elastic element 25 is relatively smaller than that of the first elastic element 24. This arrangement is more conducive to the selection of the first elastic element 24 and the second elastic element 25.

[0064] In other embodiments, such as Figure 5 As shown, when the electromagnetic drive mechanism 23 is in the first drive state, the first valve core 21 opens the first valve port 1524 and the second valve core 22 blocks the second valve port 1533.

[0065] like Figures 2 to 7As shown, a mounting opening is formed on the side of the first valve chamber 1411 away from the second valve chamber 1412. The electromagnetic drive mechanism 23 is sealed and mounted on the open end face of the mounting opening, so that the first valve core 21 and the second valve core 22 can be inserted into the valve mounting chamber 141 through the mounting opening. Furthermore, a sealing element is provided on the open plane of the mounting opening, and the sealing element is sandwiched between the electromagnetic drive mechanism 23 and the air distribution seat 1 to achieve a seal at the connection between the air distribution seat 1 and the electromagnetic drive mechanism 23.

[0066] In one embodiment, the second valve port 1533 and the first valve port 1524 are spaced apart in the first direction, with the second valve port 1533 located on the side of the first valve port 1524 away from the mounting opening, i.e., the first valve port 1524 is located between the second valve port 1533 and the electromagnetic drive mechanism 23. This allows the sealing end of the second valve core 22 to extend beyond the first valve core 21, thereby further simplifying the processing and assembly of the first valve core 21 and the second valve core 22, and reducing costs. In other embodiments, the first valve port 1524 and the second valve port 1533 may also be arranged at the same height in the first direction.

[0067] The air distribution seat 1 is provided with a first connecting port 1413 that connects the first valve chamber 1411 and the air intake channel 131. The first connecting port 1413 is located outside the second valve chamber 1412 and the first valve port 1524. The cavity wall of the second valve chamber 1412 is provided with a second connecting port 1414 that connects the air intake channel 131 and the second valve chamber 1412. Therefore, when air is introduced through the intake channel 131, the gas enters the first valve chamber 1411 through the first connecting port 1413 and the second valve chamber 1412 through the second connecting port 1414. When the electromagnetic drive mechanism 23 is not energized or the electromagnetic force generated by the electromagnetic drive mechanism 23 is less than the preset electromagnetic force, the first valve core 21 and the second valve core 22 can be stably maintained in the blocking position and will not be forced open by the gas pressure, thus ensuring the safety and reliability of the gas valve 2 and the gas distribution device. At the same time, this setting ensures that when the first valve core 21 blocks the first valve port 1524 and the second valve core 22 opens the second valve port 1533, the gas pressure on both sides of the blocking end of the first valve core 21 can be kept balanced, thereby ensuring the stability and reliability of the first valve core 21 blocking the first valve port 1524.

[0068] To improve the ease of communication between the first connecting port 1413 and the second connecting port 1414 and the air intake channel 131, the air distribution seat 1 is provided with a ventilation channel 151 that connects to the air intake channel 131. Both the first connecting port 1413 and the second connecting port 1414 are connected to the ventilation channel 151. The ventilation channel 151 extends approximately radially along the valve mounting cavity 141.

[0069] In one embodiment, the cavity wall of the second valve chamber 1412 is spaced apart from the second valve core 22, thereby avoiding friction caused by contact between the cavity wall of the second valve chamber 1412 and the second valve core 22, improving the smoothness of movement of the second valve core 22, and extending the service life of the second valve core 22.

[0070] In one embodiment, the electromagnetic drive mechanism 23 includes an electromagnetic body with a central through hole 238 and a fixed iron core 236 disposed in the first end of the central through hole 238. The electromagnetic body is mounted on the gas distribution seat 1. The first valve core 21 includes a first valve shaft 211 and a first sealing head 212 mounted on the first end of the first valve shaft 211. The second end of the first valve shaft 211 is slidably inserted into the central through hole 238. The first sealing head 212 blocks or opens the first valve port 1524. The first valve shaft 211 has a mounting through hole 2113 disposed along a first direction. The second valve core 22 includes a second valve shaft 221 and a second sealing head 222 mounted on the first end of the second valve shaft 221. The second valve shaft 221 is slidably inserted into the mounting through hole 2113. The second sealing head 222 opens or blocks the second valve port 1533.

[0071] By providing a through mounting hole 2113 on the first valve shaft 211, it is beneficial to realize the sliding installation of the second valve shaft 221 on the first valve shaft 211, while enhancing the cooperation between the second valve shaft 221 and the fixed iron core 236, thereby improving the driving reliability of the electromagnetic drive mechanism 23 on the second valve core 22.

[0072] In one embodiment, the first elastic element 24 is disposed between the end face of the electromagnetic body and the first sealing head 212, and the second elastic element 25 is disposed between the second end of the second valve shaft and the fixed iron core 236. By disposing the second elastic element 25 between the second end of the second valve shaft 221 and the fixed iron core 236, interference between the second elastic element 25 and the first valve core 21 can be avoided while installing the second elastic element 25, and the overall assembly and disassembly of the gas valve 2 on the gas distribution seat 1 can be facilitated. In other embodiments, the second elastic element 25 can also be installed between the gas distribution seat 1 and the second sealing head.

[0073] It is worth noting that the electromagnetic body includes a coil assembly, a magnetic guide frame 234, and a magnetic guide plate 237. The coil assembly includes a coil support 232 with a central hole, a coil 231 mounted on the coil support 232, and a plastic-encapsulated shell 233 encapsulating the coil 231 and the coil support 232. The magnetic guide frame 234 is U-shaped, having a top plate and two side plates connected to both sides of the top plate. The coil support 232 is mounted on the top plate, and the coil assembly is located between the two side plates. The magnetic guide plate 237 is connected to the end of the two side plates away from the top plate, and the fixed iron core 236 is connected to the magnetic guide plate 237. The electromagnetic body also includes a sleeve 235, which includes a cylindrical portion 2351 inserted into the central hole of the magnetic guide frame 234 and a mounting plate portion 2352 connected to an open end face of the cylindrical portion 2351. The mounting plate portion 2352 is fitted against the side of the top plate away from the coil assembly and is fitted against the gas distribution seat 1. The inner hole of the cylindrical portion 2351 forms a central through hole 238. The structure of the electromagnetic body can be set with reference to existing structures, which is not the focus of this embodiment and will not be described in detail here.

[0074] In one embodiment, the second sealing head 222 is always located outside the first valve core 21, thereby preventing the movement of the second valve core 22 along the first direction from causing the first valve core 21 to move, so that the movement between the first valve core 21 and the second valve core 22 can be separated as much as possible, thereby ensuring the driving effect of the electromagnetic drive mechanism 23 on the first valve core 21 and the second valve core 22.

[0075] To improve the reliability of the movement of the second valve core 22, in one embodiment, a guide ring 2114 is provided protruding from the side wall of the mounting through hole 2113. The guide ring 2114 slides with the second valve shaft 221. The provision of the guide ring 2114 not only enables the second valve shaft 221 to slide along the first direction, but also makes the outer side of the second valve shaft 221 spaced apart from the hole wall of the mounting through hole 2113, thereby reducing the contact area between the first valve core 21 and the second valve core 22. This reduces the friction during the movement of the second valve core 22 and improves the smoothness and reliability of the movement of the second valve core 22.

[0076] In one embodiment, the fixed iron core 236 includes a main body 2361 and an extension 2362 connected to one end of the main body 2361. The extension 2362 is connected to the side of the main body 2361 facing the second valve core 22. The main body 2361 is installed in the central through hole 238 and located outside the first valve shaft 211. The extension 2362 is inserted into the mounting through hole 2113. This arrangement can reduce the distance between the fixed iron core 236 and the second valve shaft 221, which is beneficial for controlling the driving force of the electromagnetic drive mechanism 23 on the second valve core 22, and also helps to reduce the motion correlation between the first valve core 21 and the second valve core 22.

[0077] Furthermore, the second elastic member 25 is sleeved on the extension 2362 and one end abuts against the main body 2361, thereby enabling the extension 2362 to guide the deformation of the second elastic member 25 and improve the deformation reliability of the second elastic member 25. The other end of the second elastic member 25 abuts against the end face of the second valve shaft 221 to reduce the machining difficulty of the second valve shaft 221.

[0078] In one embodiment, the end face of the main body 2361 is provided with a first buffer 26, and the first valve core 21 can abut against the first buffer 26 to limit the movement of the first valve core 21 away from the first valve port 1524 while reducing the impact between the first valve core 21 and the fixed iron core; and / or, the end face of the extension 2362 is provided with a second buffer 27, and the second valve core 22 can abut against the second buffer 27 to limit the movement of the second valve core 22 away from the second valve port 1533 and reduce the impact between the second valve core 22 and the fixed iron core 236.

[0079] In one embodiment, the first valve shaft 211 includes a main shaft portion 2111 having a mounting through hole 2113, and a mounting ring portion 2112 extending outward from the end of the main shaft portion 2111 away from the fixed iron core 236. The first sealing head 212 has a mounting insertion hole, which includes a first hole portion, a second hole portion, and a third hole portion communicating along a first direction. The diameter of the first hole portion is the same as the outer diameter of the main shaft portion 2111, the diameter of the second hole portion is the same as the outer diameter of the mounting ring portion 2112, and the axial dimensions of the second hole portion and the mounting ring portion 2112 are the same. The mounting ring portion 2112 is interference-fitted into the second hole portion, and the main shaft portion 2111 is interference-fitted into the first hole portion to ensure the installation stability and reliability of the first sealing head 212 on the first valve shaft 211.

[0080] It is worth noting that the mating structure between the second sealing head 222 and the second valve shaft 221 can refer to the existing mating structure between the sealing head and the valve shaft. This is not the focus of this utility model and will not be limited or elaborated here.

[0081] To improve the sealing effect of the first valve core 21 on the first valve port 1524, in one embodiment, the bottom of the first valve cavity 1411 is provided with two first sealing ring portions 16 protruding outwards. The two first sealing ring portions 16 are spaced apart and the inner first sealing ring portion 16 surrounds the second valve cavity 1412. The first valve port 1524 is formed between the two first sealing ring portions 16. The end faces of the two first sealing ring portions 16 are each formed with a first sealing surface 161. The first valve core 21 is attached to the first sealing surface 161 to seal the first valve port 1524.

[0082] By providing two first sealing ring portions 16 protruding from the bottom of the first valve cavity 1411, the first valve core 21 abuts against the first sealing ring portions 16 to seal the first valve port 1524. This enhances the compression effect on the end of the first valve core 21 through the first sealing ring portions 16, reduces the size of the first sealing surface 161, and strengthens the tightness of the seal between the first valve core 21 and the first valve port 1524. Compared to the first valve core 21 directly fitting against the bottom of the first valve cavity 1411, this avoids the problem of incomplete sealing caused by insufficient flatness of the bottom of the first valve cavity 1411 or poor compression effect of the bottom plane on the end of the first valve core 21. Specifically, the two first sealing ring portions 16 cooperate with the first sealing head 212 to seal the first valve port 1524.

[0083] In one embodiment, the gas distribution seat 1 is provided with a first connecting channel 152 connecting the first valve chamber 1411 and the first gas chamber 111. The first connecting channel 152 includes an annular channel portion 1521 located between two first sealing ring portions 16, and the end of the annular channel portion 1521 forms a first valve port 1524.

[0084] To further improve the sealing effect of the first sealing head 212 on the first valve port 1524, in one embodiment, the first sealing surface 161 is an arc-shaped surface protruding towards the first valve core 21, which enhances the squeezing effect of the first sealing ring on the first sealing head 212, thereby improving the sealing effect. Furthermore, the roughness of the first sealing surface 161 is .~.Ra, meaning the first sealing surface 161 has high smoothness, which can further reduce the probability of leakage between the first sealing surface 161 and the first sealing head 212, improving the sealing reliability.

[0085] To ensure the sealing performance of the second valve core 22 on the second valve port 1533, in one embodiment, a second sealing ring 17 protrudes from the cavity of the second valve chamber 1412. The port of the second sealing ring 17 forms the second valve port 1533, and the end face of the second sealing ring 17 forms a second sealing surface 171. The second valve core 22 fits against the second sealing surface 171 to seal the second valve port 1533. That is, the second sealing head 222 cooperates with the second sealing surface 171 to seal the second valve port 1533.

[0086] By setting a second sealing ring 17, the second sealing surface 171 is positioned higher than the bottom of the second valve cavity 1412, and the second sealing ring 17 has an annular surface structure. This allows the second valve core 22 to press against the second sealing surface 171 in the direction towards the bottom of the second valve cavity 1412 when it moves toward the second valve port 1533. This ensures the squeezing effect between the second sealing surface 171 and the second valve core 22, thereby improving the sealing effect of the second valve core 22 on the second valve port 1533.

[0087] To further enhance the compression of the second sealing surface 171 onto the second valve core 22, the second sealing surface 171 is an arc-shaped surface protruding towards the second valve core 22, thereby strengthening the compression effect of the first sealing ring on the end of the second valve core 22 and further ensuring sealing tightness. Furthermore, the roughness of the second sealing surface 171 is .~.Ra, making it a precision-machined surface, further reducing leakage between the second sealing surface 171 and the second sealing head 222.

[0088] In one embodiment, the gas distribution seat 1 is provided with a second communication channel 153 that connects the second valve chamber 1412 and the second gas chamber 112. The second communication channel 153 extends to the inner side of the second sealing ring 17, that is, the second sealing ring 17 forms part of the channel wall of the second communication channel 153.

[0089] like Figures 8 to 15 As shown, in one embodiment, the air distribution seat 1 includes an air distribution rod portion 11, a connecting seat portion 15, a valve seat portion 14, and an air intake pipe portion 13. The gas distributor 11 extends along a second direction, and the first gas chamber 111 and the second gas chamber 112 are arranged side by side and spaced apart within the gas distributor 11. The connecting seat 15 is located on one side of the gas distributor 11, and the connecting seat 15 has a ventilation channel 151 connecting the intake channel 131, a first connecting channel 152 connecting the first gas chamber 111 and the first valve chamber 1411, and a second connecting channel 153 connecting the second gas chamber 112 and the second valve chamber 1412. The valve seat 14 is installed on the side of the connecting seat 15 away from the gas distributor 11, and the valve seat 14 has a valve mounting cavity 141. The first connecting channel 152 and the second connecting channel 153 extend into the valve seat 14. The intake pipe 13 is located on the connecting seat 15 and extends along a first direction, and the intake pipe 13 has an intake channel 131. This design improves the overall structural rationality of the gas distribution seat 1, enhances the layout rationality of the internal chambers and channels of the gas distribution seat 1, and reduces the probability of interference between various structures.

[0090] In one embodiment, the gas distribution seat 1 is further provided with a third gas chamber 113 and a gas outlet 121 communicating with the third gas chamber 113. The third gas chamber 113 is always connected to the intake passage 131. Therefore, when gas enters the intake passage 131, gas always flows out of the gas outlet 121 corresponding to the third gas chamber 113. That is, the burner corresponding to the gas outlet 121 of the third gas chamber 113 is the burner of the combustion device under the minimum combustion load. Specifically, when the gas valve 2 blocks the first valve port 1524 and the second valve port 1533, the combustion load corresponding to the combustion device is the minimum combustion load. The gas outlet 121 corresponding to the third gas chamber 113 is the third gas outlet 121c.

[0091] In the second direction, the third gas chamber 113 is located between the first gas chamber 111 and the second gas chamber 112, thereby enabling the third gas outlet 121c to be located approximately in the middle region, and enabling the burner corresponding to the third gas outlet 121c to be located in the middle region of multiple burners. This ensures that when the combustion device is burning at the lowest combustion load, the flame generated by combustion can be located in the middle region, thus better guaranteeing the stability and reliability of combustion.

[0092] Furthermore, an outlet pipe 12 protrudes from the gas distributor 11. The outlet pipe 12 extends along a third direction, which forms an angle with both the first and second directions. Each outlet pipe 12 corresponds to a gas outlet 121, and multiple outlet pipes 12 are spaced apart along the second direction. The outlet end of each outlet pipe 12 forms a gas outlet 121, and the inlet end of each outlet pipe 12 communicates with the corresponding first gas chamber 111, second gas chamber 112, or third gas chamber 113. By providing the outlet pipe 12, it is convenient to assemble the gas distributor in the combustion device.

[0093] In one embodiment, the second gas chamber 112 is located on the side of the first gas chamber 111 near the valve seat portion 14, that is, in the second direction, the second gas chamber 112 is arranged directly opposite the valve mounting cavity 141, so as to facilitate the connection between the second valve port 1533 and the second gas chamber 112, simplify the structure of the second connecting channel 153, and improve the rationality of the gas path arrangement in the gas distribution seat 1.

[0094] like Figure 11 As shown, the air intake passage 131 includes a first air intake portion 1311 and a second air intake portion 1312 that are connected. The first air intake portion 1311 extends radially along the air intake pipe portion 13 and penetrates the air intake pipe portion 13 to form a gas intake port. The second air intake portion 1312 extends along a first direction and is connected to both the ventilation passage 151 and the third gas chamber 113.

[0095] like Figure 10 and Figure 14 As shown, to improve the rationality of the gas path arrangement on the gas distributor 1, in one embodiment, the first connecting channel 152 includes an annular channel portion 1521 and a main channel portion connected in sequence. The annular channel portion 1521 is located between the first sealing ring portion 16 and the second sealing ring 17, and the end port of the annular channel portion 1521 away from the main channel portion forms a first valve port 1524. The main channel portion extends from the annular channel portion 1521 into the first gas combustion chamber 111. By providing the annular channel portion 1521, it is beneficial to form the first valve port 1524. The annular channel portion 1521 is located inside the valve seat portion 14, and the main channel portion is located in the connecting portion.

[0096] The main channel section includes a first channel section 1522 and a second channel section 1523 that are connected. The first channel section 1522 is connected between the second channel section 1523 and the annular channel section 1521, and the first channel section 1522 extends in a first direction, while the second channel section 1523 extends in a third direction. This facilitates the arrangement of the first connecting channel 152 within the connecting seat section 15. Furthermore, the first channel section 1522 and the ventilation channel 151 are spaced apart in a third direction to avoid interference and improve structural compactness. Furthermore, the end of the second channel section 1523 away from the first gas chamber 111 passes through the connecting seat section 15 to form a first opening, which facilitates the processing of the second channel section 1523. A first plug is provided at the first opening.

[0097] like Figure 12 and Figure 15 As shown, in one embodiment, the second connecting channel 153 includes a first connecting portion 1531 extending along a first direction and a second connecting portion 1532 extending along a third direction. One end of the first connecting portion 1531 extends into the second valve chamber 1412 and forms a second valve port 1533. The other end of the first connecting portion 1531 communicates with the second connecting portion 1532. One end of the second connecting portion 1532 communicates with the second gas chamber 112 and the other end passes through the gas distribution seat 1 to form a second opening. The third direction is set at an angle to both the first and second directions. This simplifies the structure of the second connecting channel 153 and facilitates the processing of the second connecting portion 1532. A second plug is provided at the second opening.

[0098] This embodiment also provides a combustion device, including multiple burners arranged side by side and the aforementioned gas distribution device. Each burner has an injector, and each gas outlet 121 is connected to the injector of a burner. By employing the aforementioned gas distribution device, the processing and assembly costs of the combustion device can be reduced, the structural complexity of the combustion device can be reduced, and the user experience of the combustion device can be improved.

[0099] This embodiment also provides a gas-fired water heater, including the combustion device described above. By employing the combustion device, the processing and assembly costs of the gas-fired water heater can be simplified and reduced, the structural complexity of the gas-fired water heater can be reduced, and the user experience of the gas-fired water heater can be improved.

[0100] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0101] The specific embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A gas distribution apparatus, characterized by, include: The gas distribution seat (1) includes an air intake channel (131), a first gas chamber (111), a second gas chamber (112), and a valve mounting cavity (141). The valve mounting cavity (141) includes a first valve chamber (1411) and a second valve chamber (1412) connected along a first direction. The first valve chamber (1411) is provided with a first valve port (1524) connecting the first valve chamber (1411) and the first gas chamber (111). The second valve chamber (1412) is provided with a second valve port (1533) connecting the second gas chamber (112) and the second valve chamber (1412). The first valve port (1524) is arranged around the outside of the second valve chamber (1412). The first gas chamber (111) and the second gas chamber (112) are respectively provided with a plurality of corresponding connected gas outlets (121). The first valve chamber (1411) and the second valve chamber (1412) are both connected to the air intake channel (131). A gas valve (2) includes an electromagnetic drive mechanism (23), a first valve core (21), a second valve core (22), a first elastic element (24), and a second elastic element (25). The electromagnetic drive mechanism (23) is installed on the side of the first valve chamber (1411) away from the second valve chamber (1412). The second valve core (22) is slidably inserted into the first valve core (21) along the first direction. The first elastic element (24) causes the sealing end of the first valve core (21) to seal the first valve port (1524). The second elastic element (25) causes the sealing end of the second valve core (22) to block the second valve port (1533). The electromagnetic drive mechanism (23) has a first drive state that drives the first valve core (21) to open the first valve port (1524) or drives the second valve core (22) to open the second valve port (1533), and a second drive state that drives the first valve core (21) to open the first valve port (1524) and the second valve core (22) to open the second valve port (1533).

2. The gas distribution device of claim 1, wherein The bottom of the first valve chamber (1411) is provided with two first sealing rings (16), which are spaced apart and the inner first sealing ring (16) surrounds the second valve chamber (1412). The first valve port (1524) is formed between the two first sealing rings (16). The end faces of the two first sealing rings (16) are formed with first sealing surfaces (161). The first valve core (21) fits against the first sealing surface (161) to block the first valve port (1524). And / or, a cavity bottom of the second valve cavity (1412) is provided with a second sealing ring (17), the second sealing ring (17) is arranged around the second valve port (1533), an end face of the second sealing ring (17) forms a second sealing surface (171), and the second valve core (22) is attached to the second sealing surface (171) to block the second valve port (1533).

3. The gas distribution device of claim 1, wherein A cavity wall of the first valve cavity (1411) is provided with a first communication port (1413), the first communication port (1413) is located outside the second valve cavity (1412) and the first valve port (1524), a cavity wall of the second valve cavity (1412) is provided with a second communication port (1414), the gas distribution seat (1) is provided with an air passage (151) communicating with the air inlet channel (131), and the first communication port (1413) and the second communication port (1414) both communicate with the air passage (151).

4. The gas distribution device of any of claims 1-3, wherein, In the first direction, the first valve port (1524) and the second valve port (1533) are arranged at intervals, and the first valve port (1524) is located between the electromagnetic driving mechanism (23) and the second valve port (1533).

5. The gas distribution device of claim 4, wherein The electromagnetic driving mechanism (23) comprises an electromagnetic main body with a central through hole (238) and a fixed iron core (236) installed inside a first end of the central through hole (238); The first valve core (21) comprises a first valve shaft (211) and a first sealing head (212) installed at a first end of the first valve shaft (211), a second end of the first valve shaft (211) is slidably arranged in the central through hole (238), the first sealing head (212) blocks or opens the first valve port (1524), and the first valve shaft (211) has a mounting through hole (2113) penetrating in the first direction; The second valve core (22) comprises a second valve shaft (221) and a second sealing head (222) installed at a first end of the second valve shaft (221), the second valve shaft (221) is slidably arranged in the mounting through hole (2113), and the second sealing head (222) is always located outside the mounting through hole (2113) and can open or block the second valve port (1533).

6. The gas distribution device of claim 5, wherein A hole wall of the mounting through hole (2113) is provided with a guide ring portion (2114), and the guide ring portion (2114) is in sliding fit with the second valve shaft (221); And / or, the first elastic member (24) is arranged between an end face of the electromagnetic main body and the first sealing head (212), and the second elastic member (25) is arranged between a second end of the second valve shaft (221) and the fixed iron core (236). And / or, the fixed iron core (236) includes a main body part (2361) and an extension part (2362) protruding from one end of the main body part (2361), the cross-sectional area of the main body part (2361) is larger than the cross-sectional area of the extension part (2362), the extension part (2362) is inserted into the mounting through hole (2113), and the main body part (2361) is located outside the mounting through hole (2113).

7. The gas distribution device of any of claims 1-3, wherein, The gas distribution seat (1) comprises: A gas distribution rod part (11) extends in a second direction, and the first gas cavity (111) and the second gas cavity (112) are arranged side by side and spaced apart in the second direction on the gas distribution rod part (11), the second direction is perpendicular to the first direction, and a plurality of gas outlets (121) are arranged spaced apart in the second direction; A communication seat part (15) is protrudingly arranged on one side of the gas distribution rod part (11), the communication seat part (15) is provided with an air communication passage (151) communicating the air inlet passage (131) and the valve mounting cavity (141), a first communication passage (152) communicating the first valve cavity (1411) and the first gas cavity (111), and a second communication passage (153) communicating the first valve cavity (1411) and the second gas cavity (112), the first valve cavity (1411) and the second valve cavity (1412) are both communicated with the air communication passage (151); A valve seat part (14) is connected to the side of the communication seat part (15) away from the gas distribution rod part (11), and the valve seat part (14) is provided with the valve mounting cavity (141), the first communication passage (152) and the second communication passage (153) both extend into the valve seat part (14); An air inlet pipe part (13) is connected to the side of the communication seat part (15) away from the gas distribution rod part (11) and has the air inlet passage (131), and the air inlet pipe part (13) extends in the first direction.

8. The gas distribution device of claim 7, wherein, In the second direction, the second gas cavity (112) is arranged opposite to the valve seat part (14); And / or, the gas distribution seat (1) is provided with a third gas cavity (113) and a gas outlet (121) communicated with the third gas cavity (113), the third gas cavity (113) is located between the first gas cavity (111) and the second gas cavity (112) and is always communicated with the air inlet passage (131).

9. The gas distribution device of claim 8, wherein, The first communication passage (152) comprises an annular passage part (1521), a first communication part (1531) and a second communication part (1532) communicated in sequence, the annular passage part (1521) is arranged around the second valve cavity (1412) and forms the first valve port (1524), the first communication part (1531) extends in the second direction, the second communication part (1532) extends in a third direction and is communicated with the second gas cavity (112), and the third direction is arranged at an angle with respect to the first direction and the second direction. And / or, the second communication passage (153) comprises a first communication part (1531) extending along the first direction and a second communication part (1532) extending along a third direction, one end of the first communication part (1531) extends into the second valve cavity (1412) and forms a second valve port (1533), the other end of the first communication part (1531) communicates with the second communication part (1532), one end of the second communication part (1532) communicates with the second gas cavity (112) and the other end penetrates through the gas distribution seat (1), the third direction is arranged at an angle with the first direction and the second direction; And / or, the ventilation passage (151) extends along the second direction.

10. A combustion apparatus comprising a plurality of side-by-side fire arrays, each of said fire arrays having an injection port, characterized in that, Also included is the gas distribution device as claimed in any one of claims 1-9, each of the gas outlets (121) communicates with an injection port of one of the fire grates.

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