Gas heater

Abstract

The invention is suitable for the technical field of heaters, and provides a gas heater which comprises a gas chamber, the gas chamber comprises a gas chamber bottom plate, a plurality of sealing plates, a gas chamber top plate and a combustion device, and the gas chamber top plate and the gas chamber bottom plate are arranged up and down in the vertical direction of the gas heater; the upper end part of the sealing plate is connected with the gas chamber top plate, the lower end part of the sealing plate is connected with the gas chamber bottom plate, and the combustion device is provided with a fire outlet; the heat transfer part comprises a glass tube and a fixing frame, the glass tube is arranged over the fire outlet of the combustion device in a covering mode, and the fixing frame is installed on the upper end side of the glass tube; according to the device, the problems that the production cost is high and the internal stress is large after the supporting pieces are installed are solved, and the effects that the production cost is reduced, stress concentration is reduced, stability is improved, and the installation efficiency is high are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of heaters, and more particularly to a gas heater. Background Art

[0002] A gas heater is a device that releases heat by burning fuel to generate flames. This device requires a combustion chamber and a heat transfer and heat dissipation part. The combustion chamber and the heat transfer and heat dissipation part need to be connected together, usually using aluminum alloy supports for fixed connection.

[0003] At present, the finished aluminum alloy support parts on the market need to undergo secondary processing to meet the installation requirements of gas heaters, which wastes a lot of time. They can also be produced by redesigning the molds with suitable shapes, but the mold opening cost is high. Therefore, it is considered whether the cost problem can be solved through sheet metal bending technology. However, after the sheet metal is bent, there is a certain internal stress at the bend, and this internal stress will produce a phenomenon of recovery deformation, which will cause problems in subsequent installation and use. For example, when one end of the bent sheet metal is fixed to the gas heater, the other side cannot fit. Even if the other side is fixed to the gas heater with some tools, the internal stress at the bend cannot be released for a long time, and cracks will appear at the bend, which will have a great impact on the user experience.

[0004] Therefore, a gas heater is proposed to solve the problems of high production cost and large internal stress after the support parts are installed. Summary of the invention

[0005] In view of the deficiencies in the prior art, the object of the present invention is to provide a gas heater which reduces production costs, reduces stress concentration, improves stability and has high installation efficiency.

[0006] To achieve the above object, the embodiment of the present invention provides the following technical solution: a gas heater, comprising: A gas chamber, the gas chamber comprising a gas chamber bottom plate, a plurality of closing plates, a gas chamber top plate and a combustion device, the gas chamber top plate and the gas chamber bottom plate are arranged up and down along the vertical direction of the gas heater, the upper end of the closing plate is connected to the gas chamber top plate, the lower end of the closing plate is connected to the gas chamber bottom plate, and the combustion device has a fire outlet; a heat transfer part, the heat transfer part comprising a glass tube and a fixing frame, the glass tube cover is arranged just above the fire outlet of the combustion device, and the fixing frame is installed on the upper end side of the glass tube; and 10. The heat exchanger of claim 19, wherein the plurality of support members are connected along the vertical direction of the gas heater to form a plurality of support members, wherein the plurality of support members are connected along the vertical direction of the gas heater to form an upper support portion and a lower support portion, wherein the upper support portion includes a first support sheet, an upper main body portion and a second support sheet, wherein the upper main body portion has a first concave area and a first concave area opening, wherein the first concave area has two opposite first end edges, wherein the two first end edges define the first concave area opening, the first concave area protrudes toward the outside of the gas heater, and the first concave area opening faces the heat transfer portion, the first support sheet is connected to one of the first end edges, and the second support sheet is connected to the other of the first end edges, the first support sheet and the second support sheet are connected to the gas chamber top plate and the fixing frame, and the first support sheet, the upper main body portion and the first The two support plates are integrally formed by bending metal plates, and the lower support part includes a third support plate, a lower main body and a fourth support plate. The lower main body has a second concave area and a second concave area opening, the second concave area has two opposite second end edges, the two second end edges define the second concave area opening, the second concave area protrudes toward the outside of the gas heater, and the second concave area opening faces the gas chamber. The third support plate is connected to one of the second end edges, and the fourth support plate is connected to the other second end edge. The third support plate and the fourth support plate are connected to the gas chamber top plate and the gas chamber bottom plate. The third support plate, the lower main body and the fourth support plate are integrally formed by bending metal plates.

[0007] By adopting the above technical solution, the upper support part and the lower support part are processed by the bending metal plate integrated forming technology, and the finished metal plate is used. Compared with aluminum alloy casting, the production cost is low and the production efficiency is high. The stress at the bending point of the upper support part is evenly distributed through multiple bending points set between the first support sheet, the upper main body and the second support sheet, thereby reducing the concentration of stress; the lower support part has a similar shape to the upper support part, and also has the effect of reducing stress concentration.

[0008] The embodiment of the present invention is further configured as follows: the closing plate is located between two adjacent lower support parts and connects the two adjacent lower support parts, and the closing plate and the third support piece, the lower main body and the fourth support piece of the two adjacent lower support parts are integrally formed by bending metal plates.

[0009] By adopting the above technical solution, the closing plate and the lower supporting portion bent metal plate are integrally formed, thereby improving the stability of the lower part of the heater. At the same time, this structure can reduce the packaging cost during logistics.

[0010] The embodiment of the present invention is further configured as follows: the surface of the gas chamber bottom plate has a plurality of bottom plate edge pieces, and the intersection of two adjacent bottom plate edge pieces forms a group of bottom plate top corner areas, and the bottom plate top corner areas are placed inside the second inner concave area through the opening of the second concave area; and the fixing frame has a plurality of fixing frame edge pieces, and the intersection of two adjacent fixing frame edge pieces forms a group of fixing frame top corner areas, and the fixing frame top corner areas are placed inside the first inner concave area through the opening of the first concave area.

[0011] The embodiment of the present invention is further configured as follows: the upper support portion has a first reinforcement member, the first reinforcement member has a first connecting rib, a first fitting surface and a second fitting surface, the first connecting rib connects the first fitting surface and the second fitting surface, and the first connecting rib, the first fitting surface and the second fitting surface are integrally formed by bending metal plates, the first fitting surface and the second fitting surface are respectively fitted and connected to the first support sheet and the second support sheet, and the first connecting rib spans the opening of the first concave area.

[0012] By adopting the above technical solution, the first reinforcement member fixes the upper support part from one side of the opening of the first recessed area to prevent it from shaking when pushed by external force, thereby improving the stability of the upper part of the heater.

[0013] The embodiment of the present invention is further configured as follows: the lower support portion has a second reinforcement member, the second reinforcement member has a second connecting rib, a third fitting surface and a fourth fitting surface, the second connecting rib connects the third fitting surface and the fourth fitting surface, and the second connecting rib, the third fitting surface and the fourth fitting surface are integrally formed by bending metal plates, the second reinforcement member is placed under the bottom plate of the gas chamber, the third fitting surface and the fourth fitting surface are respectively fitted and connected to the third support sheet and the fourth support sheet, and the second connecting rib spans the opening of the second concave area.

[0014] The embodiment of the present invention is further configured as follows: the upper support portion and the lower support portion are connected via a plug-in structure.

[0015] The embodiment of the present invention is further configured as follows: the upper support portion also includes a male docking plate and a shaping piece, the male docking plate is connected to the upper main body portion, and the outer surface of the connection between the male docking plate and the upper main body portion forms a step structure, the edge of the shaping piece is connected to the inner surface of the connection, and the shaping piece is arranged to fit and connect the upper surface of the gas chamber top plate.

[0016] The embodiment of the present invention is further configured as follows: the male docking plate and the first support piece, the upper body portion and the second support piece are integrally formed by bending metal plates.

[0017] The embodiment of the present invention is further configured as follows: the lower support portion has a connecting piece, the connecting piece is arranged on the upper end side of the lower support portion and is enclosed with the upper end side of the lower support portion to form a female docking groove, and the connecting piece is inserted into the female docking groove.

[0018] The embodiment of the present invention is further configured as follows: the surface of the gas chamber top plate has a plurality of top plate edge pieces, and the intersection of two adjacent top plate edge pieces forms a group of top plate top corner areas, and the top plate top corner areas are placed inside the second inner concave area through the opening of the second concave area, and the top plate top corner areas are inserted into the space enclosed by the inner surface of the male docking plate.

[0019] By adopting the above technical solution, the male docking plate and the female docking slot, the user's installation efficiency is improved.

[0020] In summary, the present application includes at least one of the following beneficial technical effects: 1. The upper support part, the closing plate and the lower support part are processed by the integrated forming technology of the bent metal plate. The finished metal plate is used. Compared with the aluminum alloy casting forming, the production cost is low and the production efficiency is high.

[0021] 2. The stress at the bending point of the upper support part is evenly distributed through multiple bending points set between the first support piece, the upper main body and the second support piece, thereby reducing stress concentration; the lower support part has a similar shape to the upper support part, and also has the effect of reducing stress concentration.

[0022] 3. The upper support part is fixed by the first reinforcement member to prevent it from shaking when pushed by external force, thereby improving the stability of the upper part of the heater.

[0023] 4. Improve the user's installation efficiency through male docking plates and female docking slots. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a gas heater according to an embodiment of the present invention; Figure 2 It is a schematic structural diagram of an upper support portion, a lower support portion and a closing plate in an embodiment of the present invention; Figure 3 In the embodiment of the present invention Figure 2 A schematic diagram of the structure from another perspective; Figure 4 In the embodiment of the present invention Figure 3 Schematic diagram of the local structure; Figure 5 It is a schematic diagram of the structure of the gas chamber bottom plate, the gas chamber top plate and the fixing frame in an embodiment of the present invention; Figure 6It is a schematic diagram of the structure of each mounting bolt hole in an embodiment of the present invention; Figure 7 It is a schematic diagram of the partial structure of the upper support part in an embodiment of the present invention; Figure 8 It is a structural schematic diagram of the lower support part and the closing plate in an embodiment of the present invention; Description of reference numerals: 1, gas chamber; 11, gas chamber bottom plate; 111, bottom plate edge piece; 112, bottom plate top corner area; 12, closing plate; 13, panel; 14, gas chamber top plate; 141, top plate edge piece; 142, top plate top corner area; 15, combustion device; 2. heat transfer part; 21. glass tube; 22. infrared generator; 23. fixing frame; 231. edge piece of fixing frame; 232. top corner area of ​​fixing frame; 24. top cover; 3. Support member; 31. Upper support portion; 311. First support sheet; 312. Upper main body; 3121. First inner concave area; 31211. First end edge; 3122. First concave area opening; 313. Second support sheet; 314. First reinforcement member; 3141. First fitting surface; 3142. First connecting rib; 3143. Second fitting surface; 315. Male docking plate; 316. Forming sheet; 3161. Forming screw hole; 32. Lower support portion; 321. Third support sheet; 322. Lower main body; 3221. Second inner concave area; 32211. Second end edge; 3222. Second concave area opening; 323. Fourth support sheet; 324. Second reinforcement member; 3241. Third fitting surface; 3242. Second connecting rib; 3243. Fourth fitting surface; 325. Connecting sheet; 4. Install the bolt holes. DETAILED DESCRIPTION

[0025] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0026] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0027] See also Figure 1-8 , the embodiment of the present invention provides the following technical solutions: Example 1, see Figure 1A gas heater comprises a gas chamber 1, a heat transfer part 2 and a plurality of support members 3, wherein the gas chamber 1 is used to place and connect a gas tank, and fuel is provided through the gas tank, the heat transfer part 2 is used to conduct heat energy generated by combustion in the gas chamber 1, and the plurality of support members 3 are used to bear the weight of the heater as a whole, the gas chamber 1 comprises a gas chamber bottom plate 11, a plurality of closing plates 12, a gas chamber top plate 14 and a combustion device 15, the gas chamber top plate 14 and the gas chamber bottom plate 11 are arranged up and down along the vertical direction of the gas heater, the upper end of the closing plate 12 is connected to the gas chamber top plate 14, and the lower end of the closing plate 12 is connected to the gas chamber bottom plate 15. The plate 11 and the combustion device 15 have a fire outlet; the gas chamber 1 also includes a panel 13, the closing plate 12 and the panel 13 are arranged around the gas chamber top plate 14 and the gas chamber bottom plate 11, and the combustion device 15 is placed below the gas chamber top plate 14; the heat transfer part 2 includes a glass tube 21, an infrared generator 22, a fixing frame 23 and a top cover 24, the glass tube 21 is covered just above the fire outlet of the combustion device 15, the fixing frame 23 is installed on the upper end side of the glass tube 21, the infrared generator 22 is installed on the other end side of the glass tube 21, and a top cover 24 is arranged above the fixing frame 23, and the top cover 24 is fixedly connected to the fixing frame 23. Among them, the support of the heater is mainly realized by the support member 3, and the original processing technology is through aluminum alloy casting molding. The shape of this aluminum alloy support member 3 is a special-shaped structure. The processing in this way requires a separate mold, and the mold opening cost is high. In addition, in the process of product logistics packaging, the upper support part 31 and the lower support part 32 need to be packaged separately, which wastes packaging time and increases the packaging cost.

[0028] Therefore, see Figure 3 The support member 3 is divided into an upper support portion 31 and a lower support portion 32 along the vertical direction of the gas heater. The upper support portion 31 includes a first support sheet 311, an upper main body 312, and a second support sheet 313. The first support sheet 311, the upper main body 312, and the second support sheet 313 are integrally formed by bending metal plates. The lower support portion 32 includes a third support sheet 321, a lower main body 322, and a fourth support sheet 323. The third support sheet 321, the lower main body 322, and the fourth support sheet 323 are integrally formed by bending metal plates. The upper support portion 31 and the lower support portion 32 are processed by the bending metal plate integral forming technology, and the finished metal sheet is used. Compared with aluminum alloy casting, the production cost is low and the production efficiency is high.

[0029] See also Figure 4-6The upper main body 312 has a first concave area 3121 and a first concave area opening 3122, the first concave area 3121 has two opposite first end edges 31211, the two first end edges 31211 define the first concave area opening 3122, the first concave area 3121 protrudes toward the outside of the gas heater, and the first concave area opening 3122 faces the heat transfer part 2, the first support plate 311 is connected to one first end edge 31211, the second support plate 313 is connected to the other first end edge 31211, the first support plate 311 and the second support plate 313 are connected to the gas chamber top plate 14 and the fixing frame 23, the lower main body 322 has a second concave area 3221 and a first concave area 3222. The second concave area opening 3222, the second inner concave area 3221 has two opposite second end edges 32211, the two second end edges 32211 define the second concave area opening 3222, the second inner concave area 3221 protrudes toward the outside of the gas heater, the second concave area opening 3222 faces the gas chamber 1, the third support plate 321 is connected to one second end edge 32211, the fourth support plate 323 is connected to the other second end edge 32211, the third support plate 321 and the fourth support plate 323 are connected to the gas chamber top plate 14 and the gas chamber bottom plate 11, and the support member 3 is provided with a mounting bolt hole 4 at the joint with the gas chamber bottom plate 11, the gas chamber top plate 14 and the fixing frame 23. When the first support piece 311 and the second support piece 313 are fixed to the gas chamber top plate 14 and the fixing frame 23 by bolts passing through the mounting bolt holes 4, the metal plates that have been deformed to restore are locked by the bolts, so that the first support piece 311 and the second support piece 313 fit the gas chamber top plate 14 and the fixing frame 23. At this time, there is stress at the bending part. Through the multiple bending points arranged between the first support piece 311, the upper main body 312 and the second support piece 313, the stress can be evenly distributed through the multiple bending points, thereby reducing the concentration of stress. The lower support part 32 is similar in shape to the upper support part 31, and also has the effect of reducing stress concentration.

[0030] Example 2, see Figure 8 The closing plate 12 is located between two adjacent lower support parts 32 and connects the two adjacent lower support parts 32. The lower support part 32 on one side is connected to the closing plate 12 through the third support piece 321, and the lower support part 32 on the other side is connected to the closing plate 12 through the fourth support piece 323. The closing plate 12 and the third support piece 321, the lower body part 322 and the fourth support piece 323 of the two adjacent lower support parts 32 are integrally formed by bending metal plates. The closing plate 12 and the two lower support parts 32 are integrally formed by bending metal plates, which has high production and installation efficiency, and the connection strength between them is high, thereby improving the stability of the bottom of the heater.

[0031] Example 3, see Figure 7The upper support part 31 has a first reinforcement 314, and the first reinforcement 314 has a first connecting rib 3142, a first fitting surface 3141 and a second fitting surface 3143. The first connecting rib 3142 connects the first fitting surface 3141 and the second fitting surface 3143, and the first connecting rib 3142, the first fitting surface 3141 and the second fitting surface 3143 are integrally formed by bending a metal plate, and the first fitting surface 3141 and the second fitting surface 3143 are respectively fitted and connected with the first support sheet 311 and the second support sheet 313, and the first connecting rib 3142 spans the first concave opening 3122. The upper support part 31 is fixed from the inner side of the upper main body 312 by the first reinforcement 314, so that it is prevented from shaking easily when pushed by an external force, thereby improving the stability of the upper components of the heater.

[0032] See also Figure 8 The lower support portion 32 has a second reinforcing member 324, which has a second connecting rib 3242, a third fitting surface 3241 and a fourth fitting surface 3243. The second connecting rib 3242 connects the third fitting surface 3241 and the fourth fitting surface 3243, and the second connecting rib 3242, the third fitting surface 3241 and the fourth fitting surface 3243 are integrally formed by bending a metal plate. The second reinforcing member 324 is placed below the bottom plate 11 of the gas chamber, and the third fitting surface 3241 and the fourth fitting surface 3243 are respectively fitted and connected with the third support sheet 321 and the fourth support sheet 323, and the second connecting rib 3242 spans the second concave opening 3222. The second reinforcing member 324 is used to improve the strength of the heater leg and make the bottom more solid.

[0033] See also Figure 2-7 , the upper support part 31 is connected to the lower support part 32 by a plug-in structure. The upper support part 31 also includes a male docking plug-in plate 315 and a shaping piece 316. The male docking plug-in plate 315 is connected to the upper main body part 312, and the outer surface of the connection between the male docking plug-in plate 315 and the upper main body part 312 forms a step structure. The edge of the shaping piece 316 is connected to the inner surface of the connection. The shaping piece 316 is arranged to fit the upper surface of the gas chamber top plate 14. The shaping piece 316 and the gas chamber top plate 14 are connected through the shaping screw hole 3161. The shaping screw hole 3161 is used to insert a bolt to fix the shaping piece 316 to the gas chamber top plate 14. The male docking plug-in plate 315 is integrally formed with the first support piece 311, the upper main body part 312 and the second support piece 313 by bending the metal plate. The lower support part 32 has a connecting piece 325, which is arranged on the upper end side of the lower support part 32 and encloses the upper end side of the lower support part 32 to form a female docking groove, and the connecting piece 325 is inserted into the female docking groove. The male docking plug plate 315 and the female docking groove are docked and installed to improve the user's installation efficiency, and the fixing piece 316 is connected to the gas chamber top plate 14 to further improve the stability above the heater.

[0034] See also Figure 5 The surface of the gas chamber bottom plate 11 has a plurality of bottom plate edge pieces 111, and the intersection of two adjacent bottom plate edge pieces 111 forms a group of bottom plate top corner areas 112, and the bottom plate top corner areas 112 are placed inside the second inner concave area 3221 through the second concave area opening 3222; and the fixing frame 23 has a plurality of fixing frame edge pieces 231, and the intersection of two adjacent fixing frame edge pieces 231 forms a group of fixing frame top corner areas 232, and the fixing frame top corner areas 232 are placed inside the first inner concave area 3121 through the first concave area opening 3122. The surface of the gas chamber top plate 14 has a plurality of top plate edge pieces 141, and the intersection of two adjacent top plate edge pieces 141 forms a group of top plate top corner areas 142, and the top plate top corner areas 142 are placed inside the second inner concave area 3221 through the second concave area opening 3222, and the top plate top corner areas 142 are inserted into the space enclosed by the inner surface of the male docking plug plate 315. The bottom plate top corner area 112, the top plate top corner area 142 and the fixing frame top corner area 232 abut against the first end edge 31211 or the second end edge 32211. By setting two abutment points for each top corner area, the force is more uniform and the heater as a whole is more stable.

[0035] In the fourth embodiment, the top corner area 232 of the fixing frame is adapted to the shape of the first concave area opening 3122, and the top corner area 112 of the bottom plate, the top corner area 142 of the top plate and the second concave area opening 3222 are adapted to shape. The overall stability of the heater is further improved through a larger contact area.

[0036] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

Claims

1. A gas heater, characterized in that: include: A gas chamber (1), the gas chamber (1) comprising a gas chamber bottom plate (11), a plurality of closing plates (12), a gas chamber top plate (14) and a combustion device (15), the gas chamber top plate (14) and the gas chamber bottom plate (11) being arranged vertically along the vertical direction of the gas heater, the upper end of the closing plate (12) being connected to the gas chamber top plate (14), the lower end of the closing plate (12) being connected to the gas chamber bottom plate (11), and the combustion device (15) having a fire outlet; a heat transfer part (2), the heat transfer part (2) comprising a glass tube (21) and a fixing frame (23), the glass tube (21) being arranged to cover directly above the fire outlet of the combustion device (15), and the fixing frame (23) being installed on the upper end side of the glass tube (21); and A plurality of groups of support members (3), wherein the support members (3) are divided into an upper support portion (31) and a lower support portion (32) along the upright direction of the gas heater, wherein the upper support portion (31) comprises a first support sheet (311), an upper main body portion (312) and a second support sheet (313), wherein the upper main body portion (312) has a first inner concave area (3121) and a first concave area opening (3122), wherein the first inner concave area (3121) has two opposite first end edges (31211), wherein the two first end edges (31211) define the first concave area opening (3122). 22), the first concave area (3121) protrudes toward the outside of the gas heater, the first concave area opening (3122) faces the heat transfer part (2), the first support sheet (311) is connected to one of the first end edges (31211), the second support sheet (313) is connected to the other of the first end edges (31211), the first support sheet (311) and the second support sheet (313) are connected to the gas chamber top plate (14) and the fixing frame (23), the first support sheet (311), the upper main body (312) and the The second support sheet (313) is formed as a whole by bending a metal plate, the lower support portion (32) comprises a third support sheet (321), a lower main body portion (322) and a fourth support sheet (323), the lower main body portion (322) having a second concave area (3221) and a second concave area opening (3222), the second concave area (3221) having two opposite second end edges (32211), the two second end edges (32211) defining the second concave area opening (3222), the second concave area (3221) facing the gas heater The outer portion of the second concave area protrudes, the opening (3222) of the second concave area faces the gas chamber (1), the third support sheet (321) is connected to one of the second end edges (32211), the fourth support sheet (323) is connected to the other second end edge (32211), the third support sheet (321) and the fourth support sheet (323) are connected to the gas chamber top plate (14) and the gas chamber bottom plate (11), and the third support sheet (321), the lower main body (322) and the fourth support sheet (323) are integrally formed by bending metal plates.

2. A gas heater according to claim 1, characterized in that: The closing plate (12) is located between two adjacent lower support portions (32) and connects the two adjacent lower support portions (32); the closing plate (12) and the third support piece (321), the lower main body (322) and the fourth support piece (323) of the two adjacent lower support portions (32) are integrally formed by bending metal plates.

3. A gas heater according to claim 1, characterized in that: The surface of the gas chamber bottom plate (11) has a plurality of bottom plate edge pieces (111), and the intersection of two adjacent bottom plate edge pieces (111) forms a group of bottom plate top corner areas (112), and the bottom plate top corner areas (112) are placed inside the second inner concave area (3221) through the second concave area opening (3222); and the fixing frame (23) has a plurality of fixing frame edge pieces (231), and the intersection of two adjacent fixing frame edge pieces (231) forms a group of fixing frame top corner areas (232), and the fixing frame top corner areas (232) are placed inside the first inner concave area (3121) through the first concave area opening (3122).

4. A gas heater according to claim 1, characterized in that: The upper support portion (31) has a first reinforcement member (314), the first reinforcement member (314) having a first connecting rib (3142), a first fitting surface (3141) and a second fitting surface (3143), the first connecting rib (3142) connecting the first fitting surface (3141) and the second fitting surface (3143), and the first connecting rib (3142), the first fitting surface (3141) and the second fitting surface (3143) are integrally formed by bending metal plates, the first fitting surface (3141) and the second fitting surface (3143) are respectively fitted and connected to the first support sheet (311) and the second support sheet (313), and the first connecting rib (3142) spans the first concave area opening (3122).

5. A gas heater according to claim 1, characterized in that: The lower support portion (32) has a second reinforcement member (324), the second reinforcement member (324) having a second connecting rib (3242), a third fitting surface (3241) and a fourth fitting surface (3243), the second connecting rib (3242) connecting the third fitting surface (3241) and the fourth fitting surface (3243), and the second connecting rib (3242), the third fitting surface (3241) and the fourth fitting surface (3243) are integrally formed by bending metal plates, the second reinforcement member (324) is placed below the bottom plate (11) of the gas chamber, the third fitting surface (3241) and the fourth fitting surface (3243) are respectively fitted and connected to the third support sheet (321) and the fourth support sheet (323), and the second connecting rib (3242) spans the second concave area opening (3222).

6. A gas heater according to claim 1, characterized in that: The upper support portion (31) and the lower support portion (32) are connected via a plug-in structure.

7. A gas heater according to claim 6, characterized in that: The upper support portion (31) further comprises a male butt plug plate (315) and a shaping piece (316); the male butt plug plate (315) is connected to the upper main body portion (312); and the outer surface of the connection between the male butt plug plate (315) and the upper main body portion (312) forms a step structure; the edge of the shaping piece (316) is connected to the inner surface of the connection; and the shaping piece (316) is arranged to fit and connect to the upper surface of the gas chamber top plate (14).

8. A gas heater according to claim 7, characterized in that: The male docking plate (315) is integrally formed with the first support plate (311), the upper main body (312) and the second support plate (313) by bending metal plates.

9. A gas heater according to claim 8, characterized in that: The lower support portion (32) has a connecting piece (325), the connecting piece (325) is arranged on the upper end side of the lower support portion (32) and is enclosed with the upper end side of the lower support portion (32) to form a female docking groove, and the connecting piece (325) is inserted into the female docking groove.

10. A gas heater according to claim 9, characterized in that: The surface of the gas chamber top plate (14) has a plurality of top plate edge pieces (141), and the intersection of two adjacent top plate edge pieces (141) forms a group of top plate top corner areas (142), and the top plate top corner areas (142) are placed inside the second inner concave area (3221) through the second concave area opening (3222), and the top plate top corner areas (142) are inserted into the space enclosed by the inner surface of the male docking plate (315).

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