AU2022207584A1 - Gas apparatus and gas water heater - Google Patents

Abstract

A gas apparatus (100). The gas apparatus (100) comprises: a frame body (10), a cover plate (20), a smoke hood (30) and a heat exchanger (40), the cover plate (20) covering the frame body (10) at a front side, the heat exchanger (40) being mounted on the frame body (10), the smoke hood (30) being arranged at the top of the frame body (10), and the frame body (10), the cover plate (20), an end plate of the heat exchanger (40), and the smoke hood (30) cooperatively defining a mounting cavity; and a burner (50), the burner (50) being fitted in the mounting cavity.

Description

GAS DEVICE AND GAS WATER HEATER CROSS-REFERENCE TO RELATED APPLICATION

[0001] This application claims priority to Chinese Patent Application No. 202120120973.4, filed on January 15, 2021 by Wuhu Midea Kitchen and Bath Appliances MFG. Co., Ltd. and

Midea Group Co., Ltd., the entire disclosure of which is incorporated herein by reference.

FIELD

[0002] The present disclosure relates to the field of water heater technologies, and more

particularly, to a gas device and a gas water heater.

BACKGROUND

[0003] In the related art, a burner, a heat exchanger, a draft hood, and a fan assembly of a

gas device are generally independent of each other, and thus need to be assembled in several

angles and directions, and a large number of screws are required to be fixed and sealed during

this assembly. Such a complex assembling method has low production efficiency and

inconvenient after-sales maintenance due to difficulty in realizing automatic production.

SUMMARY

[0004] The present disclosure aims to solve at least one of the technical problems in the

related art. To this end, according to some embodiments of the present disclosure, a gas device

is provided. The gas device has a plurality of components integrally arranged, which simplifies

an assembling structure and a sealing structure. In this way, production efficiency can be

improved.

[0005] According to some embodiments of the present disclosure, a gas water heater having

the above-mentioned gas device is also provided.

[0006] A gas device according to the embodiments of the present disclosure includes a frame, a cover plate, a draft hood, and a heat exchanger. The cover plate covers the frame at a front side. The heat exchanger is mounted at the frame. The draft hood is disposed on top of the frame. The frame, the cover plate, an end plate of the heat exchanger, and the draft hood cooperatively define a mounting cavity. The burner is fitted in the mounting cavity.

[0007] In the gas device according to the embodiments of the present disclosure, the mounting cavity is defined by the frame, the draft hood, and the cover plate, and the burner and components of the heat exchanger are mounted in the mounting cavity. Therefore, the plurality of components is integrally arranged. In this way, the assembling structure and the sealing structure are simplified. As a result, the production efficiency can be improved to realize automatic production. Furthermore, heat loss and leakage of waste gas can be reduced during operation of the gas device, and thus energy consumption can be reduced and safety can be improved. In addition, structures of components of the gas device are suitable for frontal mounting and modularization to improve the assembling efficiency.

[0008] In addition, the gas device according to the above-mentioned embodiments of the present disclosure may further have the following additional technical features.

[0009] According to some embodiments of the present disclosure, the frame includes a left side plate, a rear side plate, a right side plate, and a bottom plate. A front portion of the draft hood has a top mounting surface cooperating with an upper end portion of the cover plate, and the upper end portion of the cover plate is engaged with and connected to the top mounting surface.

[0010] According to some embodiments of the present disclosure, the left side plate and the right side plate of the frame are bent to form a first side mounting surface engaged with the cover plate. The heat exchanger is mounted at upper ends of each of the left side plate and the right side plate of the frame. Each of a left end plate and a right end plate of the heat exchanger has a second side mounting surface engaged with the cover plate. A left edge and a right edge of the cover plate are engaged with and connected to the first side mounting surface and the second side mounting surface.

[0011] According to some embodiments of the present disclosure, a bottom plate flange is disposed at a bottom plate of the frame and extends upwards or downwards, and the bottom plate flange is formed as a bottom mounting surface engaged with and connected to a bottom of the cover plate.

[0012] According to some embodiments of the present disclosure, a connection through hole is formed on each of the top mounting surface, the first side mounting surface, the second

side mounting surface, the bottom mounting surface, and the cover plate to allow for

connections by fasteners; and/or one of a hook and a groove is formed on each of the top

mounting surface, the first side mounting surface, the second side mounting surface, and the

bottom mounting surface, and another one of the hook and the groove is formed on the cover

plate, to allow for connections through a hook-groove structure.

[0013] According to some embodiments of the present disclosure, a rear part of the draft

hood has a rear mounting surface engaged with top of a rear side plate of the frame, and a

connection through hole is formed on each of the rear mounting surface and the rear side plate

of the frame to allow for a connection by a fastener.

[0014] According to some embodiments of the present disclosure, the burner has a bottom

side plate, and a lower flange is disposed at a rear end of the bottom side plate and extending

downwards. The lower flange is attached to a rear side plate of the frame to form a burner

mounting surface engaged with the rear side plate of the frame.

[0015] According to some embodiments of the present disclosure, one or more

reinforcement structures are arranged close to the connection through hole on the cover plate.

[0016] According to some embodiments of the present disclosure, a left side plate and a

right side plate of the draft hood are welded to a left end plate and a right end plate of the heat

exchanger, respectively; or a first connection portion is disposed a lower edge of each of the

left side plate and the right side plate of the draft hood, and a first connection engagement

portion is disposed on each of a left end plate and a right end plate of the heat exchanger, and

the first connection portion and the first connection engagement portion is snapped with each

other through a hook-flange structure.

[0017] According to some embodiments of the present disclosure, the frame includes a left

side plate, a rear side plate, a right side plate, and a bottom plate. Each of the left side plate and

the right side plate has a smaller height than the rear side plate. A second connection portion is

disposed on an upper edge of each of the left side plate and the right side plate of the frame. A

'I second connection engagement portion is disposed on a lower edge of each of a left end plate and a right end plate of the heat exchanger. The second connection portion and the second connection engagement portion are snapped with each other through a hook-flange structure or are engaged with and connected to each other by a fastener.

[0018] According to some embodiments of the present disclosure, a fan assembly is fitted on a bottom plate of the frame and located outside the mounting cavity. A fan port is formed on

the bottom plate of the frame and corresponds to an air outlet of the fan assembly. A first

positioning lug is disposed on the fan assembly. A second positioning lug is disposed on a

bottom surface of the bottom plate and extends downwards, and the first positioning lug and

the second positioning lug are locked with each other by a fastener.

[0019] According to some embodiments of the present disclosure, a fan port is formed on a bottom plate of the frame. Cooling heat insulation plates are arranged at intervals on at least

one side plate of the mounting cavity to form air-cooled channels in communication with the

fan port. An inlet of at least one of the air-cooled channels is located lower than a burning

surface of the burner, and airflow flowing out of an outlet is at least partially blown towards a

bottom of the heat exchanger.

[0020] According to some embodiments of the present disclosure, the cooling heat insulation plates include first cooling heat insulation plates arranged at intervals on a left side

plate and/or a right side plate of the frame to form first air-cooled channels. An inlet is formed

on a bottom of each of the first air-cooled channels, and an outlet is formed on top of each of

the first air-cooled channels. The cooling heat insulation plates also includes second cooling

heat insulation plates arranged at intervals on a rear side plate of the frame and/or the cover

plate to form second air-cooled channels, and each of the second cooling heat insulation plates

has a plurality of outlets vertically arranged at intervals.

[0021] According to some embodiments of the present disclosure, each of the second

cooling heat insulation plates has a plurality of interception sections. Each of the plurality of

interception sections has a transverse extending segment extending from inside to outside and

a longitudinal extending segment bent upwards and extending obliquely. A starting end of the

longitudinal extending segment is connected to an outer end of the transverse extending

segment, and the plurality of outlets of the second air-cooled channel is formed on each of the

A plurality of interception sections.

[0022] According to some embodiments of the present disclosure, a connection between a transverse extending segment and a longitudinal extending segment of an uppermost one of the

plurality of interception sections of the second heat insulation plate is in contactable

engagement with the rear side plate of the frame and/or the cover plate, and a connection

between a transverse extending segment and a longitudinal extending segment of each of the

remaining interception sections of the plurality of interception sections is spaced apart from the

rear side plate of the frame and/or the cover plate; and/or the heat exchanger is surrounded by

some of a plurality of second air-cooled channels.

[0023] According to some embodiments of the present disclosure, the second cooling heat

insulation plate extends towards the rear side plate of the frame and/or top of the cover plate to

a side portion of the heat exchanger to form a heat insulation portion on each of a front side

surface and a rear side surface of the heat exchanger.

[0024] According to some embodiments of the present disclosure, a left support flange is disposed on the left side plate of the frame to support a left end plate of the heat exchanger. The

outlet of the first air-cooled channel corresponding to the left side plate of the frame is flush

with the left support flange. A right support flange is disposed on the right side plate of the

frame to support a right end plate of the heat exchanger. The outlet of thefirst air-cooled channel

corresponding to the right side plate of the frame is flush with the right support flange.

[0025] According to some embodiments of the present disclosure, the mounting cavity

includes a first cavity located between a bottom side plate of the burner and the bottom plate of

the frame and a second cavity located between the burner and the heat exchanger. The gas

device further includes a fan assembly having an air outlet in communication with a middle part

of the first cavity. Airflow entering the first cavity partially flows upwards to top of the second

cavity through the first air-cooled channels.

[0026] According to some embodiments of the present disclosure, the mounting cavity includes a first cavity located between a bottom side plate of the burner and the bottom plate of

the frame and a second cavity located between the burner and the heat exchanger. The gas

device further includes a fan assembly having an air outlet in communication with a middle part

of the first cavity. Airflow entering the first cavity partially flows upwards to a plurality of longitudinal positions in the second cavity through the second air-cooled channels.

[0027] According to some embodiments of the present disclosure, a left side and a right side of a bottom side plate of the burner are formed into flanges extending downwards and in

contactable engagement with the first cooling heat insulation plates arranged at intervals on the

left side and the right side of the frame. The air inlet of the first air-cooled channel is formed

on a lower part of the bottom side plate of the burner.

[0028] According to some embodiments of the present disclosure, a left side plate, a right side plate, and a rear side plate of the frame are integrally formed into a frame body. A bottom

plate of the frame is riveted to a bottom of the frame body, and the cover plate is connected to

the frame body and a bottom plate of the frame.

[0029] According to some embodiments of the present disclosure, first cooling heat insulation plates are arranged at intervals on each of a left side plate and a right side plate of the

frame to form first air-cooled channels. Second cooling heat insulation plates are arranged at

intervals on a rear side plate of the frame to form second air-cooled channels. The first cooling

heat insulation plates and the second cooling heat insulation plates are integrally formed.

[0030] A gas water heater according to embodiments of the present disclosure includes the

gas device according to the embodiments of the present disclosure.

[0031] Additional aspects and advantages of the embodiments of present disclosure will be

provided at least in part in the following description, or will become apparent in part from the

following description, or can be learned from the practice of the embodiments of the present

disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

[0032] These and other aspects and advantages of embodiments of the present disclosure

will become apparent and more readily appreciated from the following descriptions made with

reference to the accompanying drawings, in which:

[0033] FIG. 1 is an exploded view of a gas device according to some embodiments of the

present disclosure.

[0034] FIG. 2 is a schematic structural view of a gas device according to some embodiments of the present disclosure.

[0035] FIG. 3 is a schematic enlarged view at circle A in FIG. 2.

[0036] FIG. 4 is a schematic structural view of a draft hood according to some embodiments of the present disclosure.

[0037] FIG. 5 is a schematic structural view of a heat exchanger according to some embodiments of the present disclosure.

[0038] FIG. 6 is a schematic structural view of a frame according to some embodiments of the present disclosure.

[0039] FIG. 7 is a schematic structural view of a cover plate according to some embodiments of the present disclosure.

[0040] FIG. 8 is a schematic structural view of a burner according to some embodiments of the present disclosure.

[0041] FIG. 9 is a schematic structural view of a gas dispensing rod according to some embodiments of the present disclosure.

[0042] FIG. 10 is a schematic structural view of a fan assembly according to some embodiments of the present disclosure.

[0043] FIG. 11 is a schematic structural view of a fan assembly according to some embodiments of the present disclosure.

[0044] FIG. 12 is a schematic partial structural view of a connection between a fan assembly and a frame according to some embodiments of the present disclosure.

[0045] FIG. 13 is a schematic partial structural view of a connection between a fan assembly and a frame according to some embodiments of the present disclosure.

[0046] FIG. 14 is a cross-sectional view of a gas device according to some embodiments of the present disclosure.

[0047] FIG. 15 is a cross-sectional view of a gas device according to some embodiments of the present disclosure.

[0048] FIG. 16 is a schematic enlarged view at circle B in FIG. 15.

[0049] FIG. 17 is an exploded view of a gas device according to some other embodiments of the present disclosure.

[0050] FIG. 18 is a schematic structural view of a gas device according to some other

'7 embodiments of the present disclosure.

[0051] FIG. 19 is a schematic structural view of a draft hood and a heat exchanger according to some other embodiments of the present disclosure.

[0052] FIG. 20 is a schematic partial structural view of a connection between a heat exchanger and a frame according to some other embodiments of the present disclosure.

[0053] FIG. 21 is a schematic structural view of a frame according to some other embodiments of the present disclosure.

[0054] FIG. 22 is a schematic structural view of a cover plate according to some other embodiments of the present disclosure.

[0055] FIG. 23 is a schematic partial structural view of a connection between a cover plate and a frame according to some other embodiments of the present disclosure.

[0056] FIG. 24 is a schematic partial structural view of a connection between a cover plate and a draft hood according to some other embodiments of the present disclosure.

[0057] FIG. 25 is a cross-sectional view of a gas device according to some other embodiments of the present disclosure.

[0058] FIG. 26 is a cross-sectional view of a gas device according to some other embodiments of the present disclosure.

[0059] FIG. 27 is a cross-sectional view of a gas device according to some other embodiments of the present disclosure.

[0060] Reference numerals:

[0061] gas device 100; frame 10; frame flange 101; bottom plate flange 102; sixth connection through hole 606; first positioning through hole 701; second positioning through hole 702; third positioning through hole 703; positioning flange 11; left side plate 12 of frame 10; rear side plate 13 of frame 10; right side plate 14 of frame 10; bottom plate 15 of frame 10; recess 151; second connection portion 16; fan port 17; second positioning lug 18; elongated positioning aperture 19; cover plate 20; first connection through hole 601; second connection through hole 602; third connection through hole 603; first hook 21; positioning notch 22; reinforcement rib 23; position limit flange 24; position limit notch 241; draft hood 30; fourth connection through hole 604; fourth positioning through hole 704; first flange 31; first connection portion 32; top mounting surface 33; heat exchanger 40; fifth connection through

Q hole 605; fifth positioning through hole 705; left end plate 41; upper flange 411; lower flange

412; front flange 413; rear flange 414; right end plate 42; first connection engagement portion

43; second connection engagement portion 44; first connection pipe 45; second connection pipe

46; burner 50; bottom side plate 51; burner flange 52; through hole 53; sixth positioning through

hole 706; seventh connection through hole 607; gas dispensing rod 60; eighth connection

through hole 608; seal 61; fan assembly 70; first positioning lug 71; positioning strip 72; air

outlet 73; cooling heat insulation plate 80; first cooling heat insulation plate 81; second cooling

heat insulation plate 82; interception section 821; transverse extending segment 822;

longitudinal extending segment 823; air-cooled channel 90; first air-cooled channel 91; inlet

911 of first air-cooled channel 91; outlet 912 of first air-cooled channel 91; second air-cooled

channel 92; inlet 921 of second air-cooled channel 92; outlet 922 of second air-cooled channel

92; heat insulation portion 93.

DETAILED DESCRIPTION

[0062] The embodiments of the present disclosure will be described in detail below with

reference to examples thereof as illustrated in the accompanying drawings, throughout which

same or similar elements, or elements having same or similar functions, are denoted by same

or similar reference numerals. The embodiments described below with reference to the

drawings are illustrative only, and are intended to explain rather than limit the present disclosure.

[0063] A gas device 100 according to embodiments of the present disclosure will be

described below with reference to the accompanying drawings.

[0064] Referring to FIG. 1, FIG. 2, FIG. 16, and FIG. 17, the gas device 100 according to

the embodiments of the present disclosure may include a frame 10, a cover plate 20, a draft

hood 30, a heat exchanger 40, and a burner 50.

[0065] In some embodiments, as illustrated in FIG. 1, FIG. 2, FIG. 16, and FIG. 17, the

cover plate 20 covers the frame 10 at a front side, the heat exchanger 40 is mounted at the frame

10, and the draft hood 30 is disposed on top of the frame 10, to form a housing structure. It

should be noted that, the "front side" and "top" herein are based on directions shown in the

accompanying drawings, and which are not intended to indicate components must be arranged at the specific directions or be constructed and operate in the specific directions. The directions in actual application and assembling process may also be the same as the directions shown in the accompanying drawings. The draft hood 30 is fitted on the top, which is beneficial to implementing a smoke exhaust function of the gas device 100. In addition, the frame 10, the cover plate 20, end plates (such as a left end plate 41 and a right end plate 42) of the heat exchanger 40, and the draft hood 30 cooperatively define a mounting cavity. Heat exchanging components of the heat exchanger 40 are located in the mounting cavity, and the burner 50 may be fitted in the mounting cavity to form a product structure of the gas device 100. That is, the frame 10 is formed as a basic skeleton of the gas device 100. Top and front portions of the basic skeleton may be opened. The draft hood 30 and the cover plate 20 can cover different sides of the frame 10, respectively. In addition, the burner 50 and the heat exchanger 40 are located in the mounting cavity defined by the frame 10, the cover plate 20, the end plates of the heat exchanger 40, and the draft hood 30. Therefore, all functional components of the gas device 100 are integrated in a same closed space to facilitate assembling. In addition, heat loss and leakage of waste gas can be reduced during operation of the gas device 100 to reduce energy consumption and improve safety.

[0066] In some embodiments, as illustrated in FIG. 1 and FIG. 17, the burner 50 is fitted at a bottom of the mounting cavity, and the heat exchanger 40 is fitted at top of the mounting cavity. The mounting cavity can not only provide a mounting space, but also provide a burning space and a heat exchange space. In this way, the structure is simplified. Further, burning and heat exchange paths are sealed by sealing the mounting cavity. Therefore, the sealing structure and the assembling structure are simpler. As a result, the production efficiency can be improved to realize the automatic production.

[0067] In some embodiments, as illustrated in FIG. 6 and FIG. 21, the frame 10 has a top opening and a front opening, to allow the draft hood 30, the cover plate 20, the burner 50, and the heat exchanger 40 to move from the top or the front side to a position engaged with the frame 10, which facilitates the assembling.

[0068] In some embodiments, as illustrated in FIG. 1, FIG. 6, FIG. 17, and FIG. 21, a shape of the heat exchanger 40 may match with the top opening. That is, when the heat exchanger 40 is mounted in the mounting cavity, the top opening of the frame 10 is substantially closed. In

1n some embodiments, as illustrated in FIG. 1, FIG. 6, FIG. 17, and FIG. 21, end plates of the heat exchanger 40 may cooperate with the frame 10, the cover plate 20, and the draft hood 30 to form a part of the housing, and the frame 10, the cover plate 20, the draft hood 30, and the end plates of the heat exchanger 40 may cooperate with each other to define a sealed cavity. In this way, integrity and sealing performance of the structure of the gas device 100 can be achieved.

Meanwhile, the assembling of the heat exchanger 40 can be realized. In addition, pipelines of

the heat exchanger 40 can be easily connected.

[0069] As illustrated in FIG. 2 and FIG. 18, a first connection pipe 45 and a second connection pipe 46 of the heat exchanger 40 may directly extend from the ends plate of the heat

exchanger 40 to an outside of the housing without forming holes on the frame 10. In some

embodiments, the first connection pipe 45 and the second connection pipe 46 may be

respectively connected to a left end plate 41 and a right end plate 42 of the heat exchanger 40,

and are configured for an inflow and an outflow of a heat exchange medium, respectively. As a

result, it is simpler and more convenient to mount the pipelines with a simpler distribution of

heat exchange pipelines. In addition, more sufficient heat exchange of the heat exchange

medium in the heat exchanger 40 can be easily realized.

[0070] In some embodiments of the present disclosure, as illustrated in FIG. 1, FIG. 2, FIG. 17, and FIG. 18, the frame 10 may include a left side plate 12, a rear side plate 13, a right side

plate 14, and a bottom plate 15. Each of the left side plate 12 and the right side plate 14 has a

smaller height than the rear side plate 13. In this way, the left end plate 41 of the heat exchanger

40 can be mounted between the left side plate 12 and the draft hood 30, and the right end plate

42 of the heat exchanger 40 can be mounted between the right side plate 14 and the draft hood

30. Furthermore, the left side plate 12 of the frame 10, the left end plate 41 of the heat exchanger

40, and the left side plate of the draft hood 30 are connected to each other to form a left side

wall of the gas device 100, and the right end plate 42 of the heat exchanger 40, the right side

plate 14 of the frame 10, and the right side plate of the draft hood 30 are connected to each other

to form a right side wall of the gas device 100, all of which are interacted with each other and

thus have good stability.

[0071] In addition, the cover plate 20 is connected to the draft hood 30, the left end plate

41 and the right end plate 42 of the heat exchanger 40, the left side plate 12, the right side plate

14, and the bottom plate 15, and therefore the cover plate 20 may be formed as a front side wall

of the gas device 100. After the cover plate 20 is assembled, the draft hood 30, the heat

exchanger 40, the frame 10, and other structures in the mounting cavity can be covered by the

cover plate 20. In this way, the front side wall of the gas device 100 has a complete structure,

and therefore the gas device 100 has a more complete overall structure. In addition, the rear

side plate 13 of the frame 10 is formed as a rear side wall of the gas device 100. As a result, the

front side wall, the left side wall, the right side wall, and the rear side wall of the gas device

100 are connected to each other and enclosed in a circumferential direction, which further

improves the stability.

[0072] In some embodiments, as illustrated in FIG. 2 and FIG. 18, an upper end of the cover

plate 20 is located at higher level than a lower end of the draft hood 30, and a lower part of the

cover plate 20 is connected to a lower part of the frame 10. Therefore, the cover plate 20 can

more completely cover the draft hood 30, the heat exchanger 40, the frame 10, and components

in the mounting cavity. As a result, the gas device 100 has a complete appearance. In some

embodiments, the upper end of the cover plate 20 may be flush with an upper end of the front

side plate of the draft hood 30 or beyond the upper end of the front side plate of the hood 30,

and the lower end of the cover plate 20 may be flush with or beyond a lower end of the bottom

plate 15 of the frame 10. In this way, better integrity can be provided.

[0073] In some embodiments, as illustrated in FIG. 1 and FIG. 17, a position limit flange 24 may be disposed at each of four edges of the cover plate 20 and extends backwards. An

upper position limit flange 24 may be located above the front side plate of the draft hood 30. A

left position limit flange 24 may be located on a left side of the left side plate of the frame 10.

A right position limit flange 24 may be located on a right side of the right side plate of the frame

10. A lower position limit flange 24 may be located on a lower side of the bottom plate 15 of

the frame 10. Therefore, the four position limit flanges 24 can limit a position of the cover plate

20 in four different directions. In this way, the cover plate 20 is stably positioned, which allows

the cover plate 20 to be easily connected to the components such as the frame 10, the draft hood

30,and the heatexchanger40.

[0074] In some embodiments, as illustrated in FIG. 3 and FIG. 5, a lower flange 412 may

be disposed at a lower edge of the left end plate 41 of the heat exchanger 40, and a position

1) limit notch 25 may be formed on the left position limit flange 24 of the cover plate 20. After the assembling is completed, an end portion of the lower flange 412 may be inserted into the position limit notch 25, to further improve stability of position limiting of the cover plate 20, the heat exchanger 40, and the frame 10. The positions of a lower edge of the right end plate 42 of the heat exchanger 40 and the right position limit flange 24 of the cover plate 20 may also be limited by an engagement between the position limit notch 25 and the lower flange 412.

[0075] In some embodiments, the cover plate 20 may be detachably connected to the draft hood 30, the left end plate 41 and the right end plate 42 of the heat exchanger 40, the left side

plate 12, the right side plate 14, and the bottom plate 15 through for example one or more of a

snap-fit connection or a threaded connection. In this way, easy disassembly and assembly and

later maintenance of the components in the mounting cavity can be realized.

[0076] In the gas device 100 according to the embodiments of the present disclosure, the mounting cavity is defined by the frame 10, the draft hood 30, and the cover plate 20, and the

burner 50 and the components of the heat exchanger 40 are mounted in the mounting cavity.

Therefore, the plurality of components is integrally arranged. In this way, the assembling

structure and the sealing structure are simplified. As a result, the production efficiency can be

improved to realize automatic production. Further, the heat loss and leakage of waste gas can

be reduced during the operation of the gas device 100, to reduce energy consumption and

improving the safety. In addition, structures of components of the gas device are suitable for

frontal mounting and modularization to improve the assembling efficiency.

[0077] The assembling structure of the components of the gas device 100 according to some

embodiments of the present disclosure will be described below with reference to the

accompanying drawings.

[0078] In some embodiments of the present disclosure, as illustrated in FIG. 1 to FIG. 7,

the frame 10 includes a left side plate 12, a rear side plate 13, a right side plate 14, and a bottom

plate 15. A front portion of the draft hood 30 has a top mounting surface 33 cooperated with the

top of the cover plate 20, and an upper end portion of the cover plate 20 is engaged with and

connected to the top mounting surface 33 on the front portion of the draft hood 30. Therefore,

the frontal mounting of the cover plate 20 can be realized, and thus the assembling efficiency

is improved.

1'2

[0079] The connection manner between the top mounting surface 33 and the cover plate 20 in the present disclosure is not limited. For example, a through hole may be formed on each of

the top mounting surface 33 and the upper end of the cover plate 20, and a fastener may pass

through the through hole to allow for a connection between the top mounting surface 33 and

the upper end of the cover plate 20 by the fastener. In this way, the frontal assembling is more

convenient and faster. For example, one of the top mounting surface 33 and the upper end of

the cover plate 20 may be provided with a hook, and the other one of the top mounting surface

33 and the upper end of the cover plate 20 may be provided with a flange. In this way, the top

mounting surface 33 and the cover plate 20 are snapped with each other through the hook and

the flange, and the assembling structure is simple and firm.

[0080] In some embodiments of the present disclosure, as illustrated in FIG. 1 to FIG. 7, the left side plate and the right side plate of the frame are bent to form a first side mounting

surface engaged with the cover plate. The heat exchanger is mounted at upper ends of the left

side plate and the right side plate of the frame. Each of a left end plate and a right end plate of

the heat exchanger has a second side mounting surface engaged with the cover plate. A left

edge and a right edge of the cover plate are engaged with and connected to the first side

mounting surface and the second side mounting surface. The left side plate 12 and the right side

plate 14 of the frame 10 are bent towards the outside of the mounting cavity to form a mounting

surface engaged with the cover plate 20 (a frame flange 101 illustrated in FIG. 6). The heat

exchanger 40 is mounted at the upper ends of the left side plate 12 and the right side plate 14

of the frame 10, and a mounting portion (a front flange 413 illustrated in FIG. 5) is formed on

each of the left end plate 41 and the right end plate 42 of the heat exchanger 40. Therefore, the

frontal mounting of the cover plate 20 can be easily realized, and thus the assembling efficiency

is improved.

[0081] The connection manner between the frame 10 and the cover plate 20 is not limited

in this disclosure. For example, a through hole may be formed on each of the mounting surface

and the cover plate 20, and a fastener may pass through the through hole to allow for the

connection between the mounting surface and the cover plate 20 by the fastener. A through hole

may be formed on each of the mounting portion and the cover plate 20, and the fastener may

pass through the through hole to allow for a connection between the mounting portion and the

1A cover plate by the fastener. In this way, the frontal assembling is more convenient and faster.

For example, the mounting surface and the cover plate 20 may be snapped with each other

through a hook, and the mounting portion and the cover plate 20 may be snapped with each

other through a hook. In this way, the assembling structure is simple and firm.

[0082] In some embodiments, as illustrated in FIG. 1 to FIG. 7, a frame flange 101 is

disposed on a front side edge of the left side plate 12 of the frame 10 and extends leftwards, and

a frame flange 101 is disposed on a front side edge of the right side plate 14 of the frame 10

and extends rightwards. The frame flange 101 is formed as the mounting surface. That is, the

through hole, the hook, or a flange for snapping is formed on the flange of the frame 10 to

facilitate the reliable frontal mounting of the cover plate 20.

[0083] In some embodiments, as illustrated in FIG. 1to FIG. 7 and FIG. 17 to FIG. 22, a bottom plate flange is disposed at a bottom plate of the frame and extends upwards or

downwards. The bottom plate flange is formed as a bottom mounting surface, and engaged with

and connected to a bottom of the cover plate. A bottom plate flange 102 is disposed at the bottom

plate 15 of the frame 10 and extends upwards or downwards, and is connected to the cover plate

20 by the fastener. Therefore, the cover plate 20 is locked to the frame 10. A connection through

hole is formed on each of the top mounting surface, the first side mounting surface, the second

side mounting surface, the bottom mounting surface, and the cover plate to allow for

connections by fasteners; and/or one of a hook and a groove is formed on each of the top

mounting surface, the first side mounting surface, the second side mounting surface, and the

bottom mounting surface, and another one of the hook and the groove is formed on the cover

plate, to allow for connections through a hook-groove structure.

[0084] In some embodiments of the present disclosure, as illustrated in FIG. 1 to FIG. 7, a

rear part of the draft hood has a rear mounting surface engaged with top of a rear side plate of

the frame, and a connection through hole is formed on each of the rear mounting surface and

the rear side plate of the frame to allow for a connection by a fastener. A rear part of the draft

hood 30 has a rear mounting surface (a rear side wall of the draft hood 30 as illustrated in FIG.

4) engaged with the rear side plate 13 of the frame 10, and a rear part of the burner 50 has a

burner mounting surface (a burner flange 52 as illustrated in FIG. 8) engaged with the rear side

plate 13 of the frame 10. A through hole may be formed on each of the rear mounting surface,

1<C the burner mounting surface, and the rear side plate 13 to allow for a connection between the rear mounting surface and the rear side plate 13 by the fastener as well as a connection between the burner mounting surface and the rear side plate 13. Therefore, the integral mounting from the front side or the rear side can be achieved, which facilitates improving the assembling efficiency.

[0085] In some embodiments of the present disclosure, as illustrated in FIG. 7, since the frontal mounting structure is employed, the cover plate severs as an independent mounting component. One or more reinforcement structures are arranged close to the connection through hole on the cover plate to prevent the cover plate from being deformed during the assembling. Reinforcement ribs 23 may be disposed at the mounting through holes on the cover plate 20, and may be formed by performing sheet metal stamping processing on the cover plate 20. The reinforcement ribs 23 are of an annular or arc shape, and are arranged around the through holes in one-to-one correspondence to improve structural strength at the through holes. In this way, it is possible to prevent the cover plate 20 from being deformed during fastening the screw.

[0086] In some embodiments of the present disclosure, as illustrated in FIG. I to FIG. 7, a first connection through hole 601, a second connection through hole 602, and a third connection through hole 603 are form on the cover plate 20. A fourth connecting through hole 604 is formed on the front portion of the draft hood 30. A fifth connection through hole 605 is formed on the heat exchanger 40. A sixth connection through hole 606 is formed on the front side edge of the frame 10. The first connection through hole 601 and the fourth connection through hole 604 are locked together by a fastener. The second connection through hole 602 and the fifth connection through hole 605 are locked together by a fastener. The third connection through hole 603 and the sixth connection through hole 606 are locked together by a fastener. The fastener may be a screw, a bolt, etc.

[0087] Therefore, each of the draft hood 30, the frame 10 and the heat exchanger 40 may be assembled with the cover plate 20 at the front side of the cover plate 20. That is, the frontal assembling is realized without fastening screws for fixing in several directions, and therefore the assembling process can be simplified. For example, all fasteners of the cover plate 20 may be simultaneously screwed within a short time by means of specific tooling equipment to realize the automatic production. In this way, the assembling time is greatly shortened and thus the

I11A production efficiency is improved.

[0088] In some embodiments, as illustrated in FIG. 1 and FIG. 4, the fourth connection through hole 604 may be formed on the front side plate of the hood 30, to allow the cover plate

20 to be locked to the front side plate of the hood 30. In this way, the hood 30 is covered and

sealed.

[0089] In some embodiments, as illustrated in FIG. 1 and FIG. 5, the fifth connection through hole 605 is formed on the front edge of each of the left end plate 41 and the right end

plate 42 of the heat exchanger 40. For example, each of the left end plate 41 and the right end

plate 42 may include a front flange 413. The fifth connection through hole 605 is formed on the

front flange 413, and the front flange 413 is locked to the cover plate 20 by the fastener, to allow

the front flange 413 to be covered by the cover plate 20 and is sealed. In addition, the fifth

connection through hole 605 can be easily adjusted axially.

[0090] In some embodiments, as illustrated in FIG. 1 and FIG. 6, the sixth connection through hole 606 is formed on the front edge of each of the left side plate 12, the right side plate

14, and the bottom plate 15 of the frame 10. For example, each of the left side plate 12, the right

side plate 14, and the bottom plate 15 has a folded edge. The sixth connection through hole 606

is formed on the folded edge, and the folded edge is locked to the cover plate 20 by the fastener.

Therefore, the folded edge is covered by the cover plate 20 and is sealed. In addition, the sixth

connection through holes 606 can be easily adjusted axially.

[0091] In some embodiments, as illustrated in FIG. 1 and FIG. 7, the first connection

through hole 601, the second connection through hole 602, and the third connection through

hole 603 are coplanar. That is, the first connection through hole 601, the second connection

through hole 602, and the third connection through hole 603 are located in a same axial direction,

and therefore the fasteners engaged into different connection through holes can be assembled

in a same direction. Further, the assembling process is further simplified, and facilitates

simultaneous and efficient assembling. It should be noted that the number of the connection

through holes may be set as desired based on an actual situation. For example, as long as locking

requirements are satisfied, the one or more connection through holes may be provided, which

is within the scope of the present disclosure.

[0092] In some embodiments of the present disclosure, as illustrated in FIG. 1 to FIG. 7, in

1'7 order to improve stability of engagement between the hood 30 and the frame 10, a first positioning through hole 701, a second positioning through hole 702, and a third positioning through hole 703 are formed on the rear side plate 13 of the frame 10. The first positioning through hole 701 may be formed on an upper part of the rear side plate 13 of the frame 10, the second positioning through hole 702 may be located on a middle part of the rear side plate 13 of the frame 10, and the third positioning through hole 703 may be located on a lower part of the frame 10. Correspondingly, a fourth positioning through hole 704 is formed on the hood 30, a fifth positioning through hole 705 is formed on the heat exchanger 40, and a sixth positioning through hole 706 is formed on the burner 50. The first positioning through hole 701 and the fourth positioning through hole 704 are locked together by a fastener. The second positioning through hole 702 and the fifth positioning through hole 705 are locked together by a fastener. The third positioning through hole 703 and the sixth positioning through hole 706 are locked together by a fastener. These fasteners may be the screw, the bolt, etc.

[0093] After the draft hood 30, the heat exchanger 40 and the burner 50 move to a mounting position, the assembling may be performed by the fasteners from the front side or the rear side of the frame 10. That is, the frontal assembling or the back assembling can be realized without fastening the screws for fixing in several directions. Therefore, the assembling process is simplified. In addition, each of the draft hood 30, the heat exchanger 40 and the burner 50 is connected to the rear side plate 13 of the frame 10, and therefore simultaneous assembling can be implemented by corresponding fasteners. For example, all fasteners of the cover plate 20 can be simultaneously fastened within a short time by means of the specific tooling equipment to realize the automatic production. In this way, assembling time can be greatly reduced and thus the production efficiency is improved.

[0094] In some embodiments, as illustrated in FIG. 1 and FIG. 6, the fourth positioning through hole 704 is formed on the rear side plate of the draft hood 30, and therefore an axial direction of the fourth positioning through hole 704 is substantially along a front-rear direction. Further, the rear side plate of the draft hood 30 may be located on a front side of the rear side plate 13 of the frame 10, and therefore the rear part of the gas device has an integral appearance and is convenient to be assembled. As illustrated in FIG. 1 and FIG. 5, thefifth positioning through hole 705 is formed on a rear edge of each of the left end plate 41 and the right end plate

1 Q

42 of the heat exchanger 40. In some embodiments, the rear edge of each of the left end plate

41 and the right end plate 42 may include a rear flange 414, and the fifth positioning through

hole 705 is formed on the rear flange 414. Therefore, an axial direction of thefifth positioning

through hole 705 is substantially along the front-rear direction. As illustrated in FIG. 1 and FIG.

8, the sixth positioning through hole 706 is formed on the rear part of the burner 50. For example,

the rear part of the burner 50 may have a folded edge extending downwards, and the sixth

positioning through hole 706 is formed on the folded edge. Therefore, an axial direction of the

sixth positioning through hole 706 is substantially along the front-rear direction.

[0095] When each of the draft hood 30, the heat exchanger 40, and the burner 50 is connected to the rear side plate 13 of the frame 10 by the fastener, the positioning through holes

on these components are substantially in the same axial direction, and therefore the fasteners

engaged into different positioning through holes can be assembled in the same direction. In this

way, the assembly process is simplified, and sealing performance of the locking connection is

improved.

[0096] In some embodiments, as illustrated in FIG. 1 and FIG. 6, the first positioning through hole 701, the second positioning through hole 702, and the third positioning through

hole 703 are coplanar. The fasteners engaged into different positioning through holes have

substantially same starting and ending assembling positions in addition to the same axial

direction. In this way, the assembling process is further simplified, and simultaneous and

efficient assembling can be realized by the tooling equipment.

[0097] In some other embodiments of the present disclosure, as illustrated in FIG. 17 to

FIG. 19, FIG. 22 and FIG. 24, a first flange 31 is disposed at a top surface of the hood 30 and

extends upwards, and a first hook 21 is disposed on the cover plate 20. The first flange 31 is

inserted into the first hook 21 to realize positioning. In some embodiments, the first hook 21

may have a U-shaped structure with an opening facing downwards. Therefore, the first flange

31 can be inserted into the U-shaped structure through the opening.

[0098] In some embodiments, as illustrated in FIG. 17, FIG. 18, and FIG. 21 to FIG. 23, a plurality of positioning flanges 11 is disposed at the front side edge of the frame 10, and a

plurality of positioning notches 22 is correspondingly formed on the cover plate 20. The

positioning flanges 11 are snapped into the positioning notches 22 to realize positioning. In some embodiments, each positioning flange 11 may extend outwards (i.e., a positioning flange

11 on a left side edge extends leftwards, and a positioning flange 11 on a right left side edge

extends rightwards) and then extend backwards. The positioning notch 22 is in L-shaped. An

edge of the L-shaped notch has an opening, and the positioning flange 11 is movably inserted

into the L-shaped notch through the opening and then snapped with another edge of the L

shaped notch.

[0099] In some embodiments, as illustrated in FIG. 21 and FIG. 22, the third connection through hole 603 is formed on a lower side of the cover plate 20, and the sixth connection

through hole 606 is correspondingly formed on a front side of the bottom plate 15 of the frame

10. The third connection through hole 603 and the sixth connection through hole 606 are locked

together by the screw. Therefore, the lower side of the cover plate 20 is firmly locked on the

frame 10. In this way, sealing performance between the cover plate 20 and the frame 10 is

improved to avoid loss of heat and airflow to the outside.

[00100] As illustrated in FIG. 17 to FIG. 24, during the assembling of the cover plate 20, the cover plate 20 may be moved backwards to arrange the first flange 31 to be opposite to the

opening of the first hook 21, and the positioning flange 11 is positioned to the edge of the

positioning notch 22. Then, the cover plate 20 is pulled down to insert the first flange 31 into

the first hook 21. Meanwhile, the positioning flange 11 is moved to the other edge of the

positioning notch 22 to allow for snapping between the positioning flange 11 and the

positioning notch 22. Thus, the positioning of the cover plate 20 in the up-down direction and

the left-right direction is limited. Meanwhile, the third connection through hole 603 is aligned

with the sixth connection through hole 606. Finally, the third connection through hole 603 and

the sixth connection through hole 606 are locked together by the fastener. In this way, sealing

between the cover plate 20 and the frame 10 can be realized.

[00101] In some embodiments of the present disclosure, the draft hood 30 and the heat

exchanger 40 may be connected to form a first assembly. The first assembly may be integrally

fitted on the frame 10 for the heat exchange and smoke exhaust, which is beneficial to reducing

assembling steps between the components to improve the integral assembling efficiency. A

connection structure between the hood 30 and the heat exchanger 40 according to some

embodiments of the present disclosure will be described below with reference to the accompanying drawings. A left side plate and a right side plate of the draft hood are respectively welded to a left end plate and a right end plate of the heat exchanger; or a lower edge of each of the left side plate and the right side plate of the draft hood is provided with a first connection portion, and each of a left end plate and a right end plate of the heat exchanger is provided with a first connection engagement portion. The first connection portion and the first connection engagement portion are snapped with each other through a hook-flange structure.

[00102] In some embodiments, as illustrated in FIG. 19, the left side plate and the right side plate of the hood 30 may be welded to the left end plate 41 and the right end plate 42 of the heat

exchanger 40, respectively. In this way, the connection is reliable, and the sealing effect is good.

[00103] In some other embodiments, as illustrated in FIG. 1 to FIG. 5, the lower edge of

each of the left side plate and the right side plate of the draft hood 30 is provided with a first

connection portion 32, and each of the left end plate 41 and the right end plate 42 of the heat

exchanger 40 is provided with a first connection engagement portion 43. The first connection

engagement portion 43 and the first connection portion 32 may be snapped with each other

through a hook-flange structure. In some embodiment, the first connection portion 32 is a

second hook. The first connection engagement portion 43 is a second flange. The second flange

may be inserted into the second hook to allow for the connection between the hood 30 and the

heat exchanger 40. In this way, a connection operation is simple, and the hood 30 and the heat

exchanger 40 may be connected to each other in any direction. In some embodiment, the second

hook may have a U-shaped structure with an opening facing inwards (i.e., the opening of the

second hook of the left side plate faces rightwards, and the opening of the second hook of the

right side plate faces leftwards), and the second flange extends outwards. Arrangement

positions of the second flange and the second hook may also be interchangeable, which is also

within the scope of the present disclosure. In some embodiments, as illustrated in FIG. 4 and

FIG. 5, the first connection portion 32 is a third hook, and the first connection engagement

portion 43 is a first catching opening. The third hook may be snapped into the first catching

opening to allow for the connection between the hood 30 and the heat exchanger 40. In this way,

the connection operation is simple, and the hood 30 and the heat exchanger 40 may be

connected to each other in any direction. In some embodiments, the third hook may be an L

shaped plate body extending downwards and then forwards (or backwards). The L-shaped plate

I1 body moves forwards (or backwards) relative to the heat exchanger 40 after passing through the first catching opening, to allow an edge of the first catching opening is snapped above a transverse edge of the L-shaped plate body. Arrangement positions of the first catching opening and the third hook may also be interchangeable, which is within the scope of the present disclosure.

[00104] In some embodiments, as illustrated in FIG. 4 and FIG. 5, the side plate of the hood 30 may have a folded edge extending outwards, and the folded edge is formed as a third hook

through cutting and bending process. An upper flange 411 is disposed on an upper edge of the

end plate of the heat exchanger 40, and the upper flange 411 is perforated to form the first

catching opening. After the third hook is snapped into the first catching opening, the edge of

the first catching opening may be located between the transverse edge of the L-shaped plate

body and the folded edge of the draft hood 30. Therefore, the folded edge of the draft hood 30

can be in contactable engagement with the upper flange 411 of the heat exchanger 40 to realize

the position limiting in the up-down direction. Meanwhile, the reliable sealing between the draft

hood 30 and the heat exchanger 40 can be realized.

[00105] A connection structure between the heat exchanger 40 and the frame 10 according to some embodiments of the present disclosure will be described below with reference to the

accompanying drawings.

[00106] In some embodiments of the present disclosure, the frame includes a left side plate, a rear side plate, a right side plate, and a bottom plate. Each of the left side plate and the right

side plate has a smaller height than the rear side plate to form a mounting space for the heat

exchanger. An upper edge of each of the left side plate and the right side plate of the frame is

provided with a second connection portion. A lower edge of each of a left end plate and a right

end plate of the heat exchanger is provided with a second connection engagement portion. The

second connection portion and the second connection engagement portion are snapped with

each other through a hook-flange structure or are engaged with and connected to each other by

a fastener.

[00107] As illustrated in FIG. 1, FIG. 2, FIG. 17, and FIG. 18, the frame 10 includes a left

side plate 12, a rear side plate 13, a right side plate 14 and a bottom plate 15. Each of the left

side plate 12 and the right side plate 14 has a smaller height than the rear side plate 13. Therefore,

11) when the cover plate 20 and the draft hood 30 are mounted to the frame 10, local openings are formed between the draft hood 30 and the left side plate 12 as well as between the draft hood 30 and the right side plate 14. The left end plate 41 of the heat exchanger 40 is mounted between the left side plate 12 and the draft hood 30 as well as between the rear side plate 13 and the cover plate 20. The right end plate 42 of the heat exchanger 40 is mounted between the right side plate 14 and the draft hood 30 as well as the rear side plate 13 and the cover plate 20. Therefore, the heat exchanger 40 is located in a mounting cavity defined by the frame 10, the draft hood 30, and the cover plate 20. In addition, the left end plate 41 and the right end plate 42 of the heat exchanger 40 can close the local openings of the mounting cavity to facilitate formation of a sealed space. Thus, components such as the heat exchange parts of the heat exchanger 40 and the burner 50 can be located within the sealed space.

[00108] In some embodiments, as illustrated in FIG. 5, FIG. 6, and FIG. 19 to FIG. 21, a second connection portion 16 is disposed on the upper edge of each of the left end plate 41 and the right end plate 42 of the frame 10. A second connection engagement portion 44 is disposed on the lower edge of each of the left end plate 41 and the lower edge of the right end plate 42 of the heat exchanger 40. The second connection portion 16 is connected to the second connection engagement portion 44 to allow for the connection between the heat exchanger 40 and the frame 10.

[00109] In some embodiments, as illustrated in FIG. 19 to FIG. 21, the second connection portion 16 and the second connection engagement portion 44 may be snapped with each other through the hook and the flange. In some embodiments, the second connection portion 16 is a third flange, the second connection cooperation portion 44 is a fourth hook, and the third flange is hooked by the fourth hook. During the assembling, the heat exchanger 40 is assembled to the frame 10 through the snapping between the third flange and the fourth hook. In some embodiments, the fourth hook may have a U-shaped structure with an opening facing inwards. The third flange may extend outwards and be snapped into the U-shaped structure through the opening to allow for the snapping between the third flange and the fourth hook. Arrangement positions of the third flange and the fourth hook may also be interchangeable, which is within the scope of the present disclosure.

[00110] In some other embodiments, as illustrated in FIG. 5 and FIG. 6, the second connection portion 16 is a fifth hook, the second connection engagement portion 44 is a second catching opening, and the fifth hook is snapped into the second catching opening to allow for the connection between the frame 10 and the heat exchanger 40. In this way, the connection operation is simple, and the frame 10 and the heat exchanger 40 may be connected to each other in any direction. In some other embodiments, the fifth hook may be an L-shaped plate body extending upwards (or backwards). The L-shaped plate body moves forwards (or backwards) relative to the heat exchanger 40 after passing through the second catching opening, to snap an edge of the second catching opening below the transverse edge of the L-shaped plate body. Arrangement positions of the second catching opening and the fifth hook may also be interchangeable, which is also within the scope of the present disclosure.

[00111] In some embodiments, as illustrated in FIG. 5 and FIG. 6, the side plate of the frame 10 may have a folded edge extending outwards, and the folded edge is formed as the fifth hook through the cutting and bending process. The lower flange 412 is disposed on the lower edge of the end plate of the heat exchanger 40, and is perforated to form the second catching opening. After the fifth hook is snapped into the second catching opening, the edge of the second catching opening can be located between the transverse edge of the L-shaped plate body and the folded edge of the frame 10. Therefore, the folded edge of the frame 10 can be in contactable engagement with the lower flange 412 of the heat exchanger 40 to realize position limiting in the up-down direction. Meanwhile, the reliable sealing between the frame 10 and the heat exchanger 40 is facilitated.

[00112] In some embodiments of the present disclosure, as illustrated in FIG. 1, FIG. 9, and FIG. 17, the gas device 100 further includes a gas dispensing rod 60, and at least part of the gas dispensing rod 60 is fitted in the mounting cavity and located at the bottom to be arranged adjacent to the burner 50. The gas dispensing rod 60 is configured to introduce gas into the burner 50, and air and the gas are burned in the burner 50 to generate high-temperature smoke gas.

[00113] In some embodiments, the gas dispensing rod 60 may be connected to the burner 50 to be integrated into a second assembly. The second assembly may be integrally fitted in the mounting cavity. In this way, the assembling steps between the components is reduced, and the integral assembling efficiency is improved. In the actual assembling process, the burner 50 may be first mounted in the mounting cavity, and then the gas dispensing rod 60 is mounted on the burner 50.

[00114] In some embodiments, as illustrated in FIG. 1, FIG. 8, FIG. 9, and FIG. 17, a seventh connection through hole 607 is formed on a front part of the burner 50, and an eighth connection through hole 608 is formed on the gas dispensing rod 60. The seventh connection through hole 607 and the eighth connection through hole 608 are locked together by the fastener to allow for a reliable connection between the burner 50 and the gas dispensing rod 60. Further, the assembling may be performed from the front side of the frame 10, which is more convenient to the assembling.

[00115] In some embodiments, as illustrated in FIG. 8 and FIG. 9, at least one seventh connection through hole 607 is formed on each of two transverse ends of the burner 50, and at least one eighth connection through hole 608 is formed on each of two transverse ends of the gas dispensing rod 60. Therefore, the connection between these two components is realized through the two transverse ends, and the connection is thus more reliable.

[00116] In some embodiments, as illustrated in FIG. 9, a seal 61 is sleeved on the gas dispensing rod 60. After the assembling is completed, the seal 61 may be in sealing contact with the cover plate 20 and the frame 10 to ensure no leakage of the gas. In this way, use safety is improved. The seal 61 may be a rubber member, a sponge member, or the like.

[00117] In some embodiments, the burner 50 and the gas dispensing rod 60 may be assembled together in the following manner. The gas dispensing rod 60 is locked onto the burner 50 by the screw, and then the second assembly is integrally locked on the frame 10. A recess 151 may be formed on the bottom plate 15 of the frame 10 to allow the gas dispensing rod 60 to pass therethrough. As illustrated in FIG. 9 and FIG. 21, the recess 151 is formed on the front side edge of the bottom plate 15. In this way, it is convenient for a connection between the gas dispensing rod 60 and an external gas pipe.

[00118] In some embodiments of the present disclosure, as illustrated in FIG. 1, FIG. 10, FIG. 11, and FIG. 17, the gas device 100 further includes a fan assembly 70 fitted on the bottom plate 15 of the frame 10 and located outside the mounting cavity. The fan assembly 70 is configured to blow external air into the frame 10, to enable the air to be burned with the gas in the burner 50 to generate the high-temperature smoke gas. That is, the first assembly (including the heat exchanger 40 and the draft hood 30) is disposed at the upper part of the frame 10 for the heat exchange and smoke exhaust. The second assembly (including the burner 50 and the gas dispensing rod 60) is disposed at the bottom of the frame 10 to burn the air-gas gas (a mixture of the air and gas). In addition, the fan assembly 70 is disposed at the bottom of the frame 10 to blow the air into the frame 10.

[00119] In this embodiment, the assembling steps of the gas device 100 will be described below. The first assembly is fitted on the top of the frame 10, and then the second assembly is fitted in the frame 10. Then, the fan assembly 70 is fitted at the bottom of the frame 10. Finally, the cover plate 20 covers on the front side of the frame 10. The above assembling steps are merely illustrative, and the assembling steps of the gas device 100 is not intended to limit thereto. In addition, the assembling steps of the gas device 100 further include the assembling of the housing, and connections of other pipelines and lines, and the description thereof in detail will be omitted herein.

[00120] In some embodiments, the gas device further includes a fan assembly fitted on a bottom plate of the frame and located outside the mounting cavity. A fan port is formed on the bottom plate of the frame and corresponds to an air outlet of the fan assembly. A first positioning lug is disposed on the fan assembly, and a second positioning lug is disposed on a bottom surface of the bottom plate and extends downwards. The first positioning lug and the second positioning lug are locked with each other by a fastener.

[00121] In some embodiments, as illustrated in FIG. 6 and FIG. 21, a fan port 17 is formed on the bottom plate 15 of the frame 10. As illustrated in FIG. 10 to FIG. 15 and FIG. 25 to FIG. 27, an air outlet 73 of a fan assembly 70 corresponds to the fan port 17, to enable the fan assembly 70 to blow the air into the frame 10 and the mounting cavity through the fan port 17.

[00122] In addition, as illustrated in FIG. 6, FIG. 10 to FIG. 13, and FIG. 21, a first positioning lug 71 is disposed on the fan assembly 70, and a second positioning lug 18 is disposed on a bottom surface of the base plate 15 and extends downwards. The first positioning lug 71 and the second positioning lug 18 are locked with each other by a fastener. During assembling of the fan assembly 70, the air outlet 73 of the fan assembly 70 may be interfaced with the fan port 17 on the bottom plate 15. In this case, the first positioning lug 71 and the second positioning lug 18 also abut with each other. Then, the first positioning lug 71 and the second positioning lug 18 can be locked with each other by the fastener such as the screw from the front side of the frame 10 to realize the frontal assembling operation.

[00123] In some embodiments, with continued reference to FIG. 6, FIG. 10 to FIG. 13 and FIG. 21, each of the first positioning lug 71 and the second positioning lug 18 may extend in

the left-right direction and the up-down direction. In addition, an axial direction of a through

hole formed on each of the first positioning lug 71 and the second positioning lug 18 for

mounting the fastener may be along the front-rear direction. In this way, the frontal assembling

operation is more convenient.

[00124] In some embodiments, with continued reference to FIG. 6, FIG. 10 to FIG. 13 and FIG. 21, a positioning strip 72 is disposed on top of the fan assembly 70, and an elongated

positioning aperture 19 is formed on the bottom plate 15 of the frame 10. The positioning strip

72 is inserted into the elongated positioning aperture 19. During the assembling, the positioning

strip 72 may be obliquely inserted into the elongated positioning aperture 19, and then the

positioning strip 72 is attached to a wall of the positioning aperture. Therefore, stability

assembling between the fan assembly 70 and the frame 10 is further improved.

[00125] In some embodiments, as illustrated in FIG. 6 and FIG. 21, the bottom plate 15 may have a folded edge extending downwards, and the elongated positioning aperture 19 is formed

on the folded edge. The positioning strip 72 is inserted into the positioning aperture and then

attached to the folded edge. In some embodiments, the elongated positioning aperture 19 is

formed on the bottom plate 15, and the positioning strip 72 is inserted into the positioning

aperture and then is attached to a top surface of the bottom plate 15. In these cases, the

assembling stability can be improved.

[00126] In an embodiment in which both the first positioning lug 71 and the positioning strip

72 are provided, the positioning strip 72 may be inserted into the elongated positioning aperture

19 for pre-positioning, to enable the first positioning lug 71 and the second positioning lug 18

to abut with each other. For example, the first positioning lug 71 is attached to a front side (or

a rear side) of the second positioning lug 18, and the holes in the two positioning lugs are

aligned to facilitate locking between the first positioning lug 71 and the second positioning lug

18 by the fastener. In this way, the fastener is mounted more quickly. The first positioning lug

71 and the positioning strip 72 may be located on two sides (such as a left side and a right side)

')'7 of the air outlet 73 facing away from each other, respectively, to improve fixing stability of the fan assembly 70.

[00127] As illustrated in FIG. 1 to FIG. 16, the assembling process of the gas device 100 according to a first embodiment of the present disclosure will be described below. (1) The

burner 50 is first inserted into the frame 10 from a front opening of the frame 10 and fixedly

connected to the frame 10 by the screws. (2) The gas dispensing rod 60 is inserted to the burner

50 from the front opening of the frame 10 and fixedly connected to the burner 50 by the screws.

(3) The hood 30 and the heat exchanger 40 are snapped with each other through the first

connection portion 32 and the first connection engagement portion 43. (4) The heat exchanger

40 and the draft hood 30 are snapped with the frame 10 through the second connection portion

16 and the second connection engagement portion 44 for the position limiting, and then are

fixed by the screws. (5) The frame 10, the heat exchanger 40, and the hood 30 are covered with

the cover plate 20, and then fixed by the screws from the front side. (6) The positioning strip

72 on the right side of the fan assembly 70 is inserted into the elongated positioning aperture

19 on the fan port 17, and the first positioning lug 71 and the second positioning lug 18 are

fixed by the screws from the front side to complete thefixing of the fan assembly 70. Therefore,

all the screws are concentrated in two planes and can be fastened simultaneously in an

extremely short time by using the specific tooling equipment. In addition, all the components

can be assembled from the front side without frequently adjusting a direction of the gas device

100. As a result, the assembling efficiency is greatly improved to facilitate the automatic

production.

[00128] As illustrated in FIG. 17 to FIG. 27, the assembling process of the gas device 100

according to a second embodiment of the present disclosure will be described below. (1) The

first burner 50 is inserted into the frame 10 from the front opening of the frame 10 and fixedly

connected to the frame 10 by the screws. (2) The gas dispensing rod 60 is inserted to the burner

50 from the front opening of the frame 10 and fixedly connected to the burner 50 by the screws.

(3) The hood 30 and the heat exchanger 40 are fixed by welding to form the first assembly. (4)

The first assembly is inserted into the frame 10 from the front opening of the frame 10, and two

to four screws are fastened into the frame 10 from the front side for the fixing. The left end

plate and right end plate of the heat exchanger are snapped with the left end plate and right side plate of the frame 10 through the second connection portion 16 and the second connection engagement portion 44. (5) The first hook 21 at the top of the cover plate 20 is hooked to the first flange 31 on the draft hood 30. Then, the cover plate 20 is slid downwards until the positioning notch 22 on each of the left side and right side of the cover plate 20 is buckled with the positioning notch 22 on the frame 10. Finally, the cover plate 20 and the bottom of the frame 10 are fixed by the screws to realize complete constraint. (6) The positioning strip 72 on the right side of the fan assembly 70 is inserted into the elongated positioning aperture 19 on the fan port 17, and the first positioning lug 71 and the second positioning lug 18 are fixed by the screws from the front side to complete the fixing of the fan assembly 70. Therefore, the number of required screws can be greatly reduced. Further, all the edges can be assembled from the front side without frequently adjusting the direction of the gas device 100. In this way, the assembly efficiency is improved to facilitate the automatic production.

[00129] In some embodiments of the present disclosure, as illustrated in FIG. 6, FIG. 7, FIG. 21, and FIG. 22, the fan port 17 is formed on the bottom plate 15 of the frame 10, and cooling heat insulation plates 80 are arranged at intervals on at least one side plate of the mounting cavity to form air-cooled channels 90. For example, the cooling heat insulation plates 80 are arranged at intervals on at least of the cover plate 20, the left side plate 12, the right side plate 14, or the rear side plate 13 of the frame 10. The air-cooled channels 90 are in communication with the fan port 17, to enable a part of air entering the mounting cavity through the fan port 17 to be mixed with the gas for the burning, and enable the rest of the air to flow into the air-cooled channels 90 to cool the side plates of the mounting cavity. In an embodiment where the cooling heat insulation plates 80 are arranged at intervals on each of the side plates of the mounting cavity, a fully enclosed air-cooled system may be formed to achieve more reliable cooling. The heat exchanger 40 can employ a coil-free heat exchanger by providing the air-cooled system, and therefore waterway pipelines for cooling in the related art can be omitted. Thus, a volume of the heat exchanger 40 is greatly reduced, and a space of a burning region in the mounting cavity can be greatly increased without increasing a volume of the gas device 100. Further, a volume thermal density is reduced. As a result, a risk of fatigue cracking of heat exchange pipes or fins of the heat exchanger 40 can be avoided, and problems such as coil corrosion, frost cracking are also eliminated in addition to the improved reliability of the gas device 100. In addition, by forming the air-cooled channels 90 between the cooling heat insulation plates 80 and the side plates of the mounting cavity, the large-area air-cooled channels 90 can reduce temperatures of the wall surfaces and can effectively isolate burning noise. Thus, a sound quality of the whole machine can be improved. During the designing, a distribution ratio of air blown into the fan assembly 70 for the burning to air for air cooling can be adjusted by adjusting a dimension of each of the inlets of the air-cooled channels 90 to take into account requirements of both the burning and the air cooling. In some embodiments, 80% to 90% of the air blown by the fan assembly 70 participates in a burning reaction through the burner 50, and the remaining 10% to 20% of the air cools the wall surfaces of the burning chamber through the air-cooled system composed of the cooling heat insulation plates 80 together with the frame 10 and the cover plate 20.

[00130] In some embodiments of the present disclosure, the air-cooled channels are in communication with the fan port. An inlet of at least one of the air-cooled channels is located at a lower level than a burning surface of the burner, and airflow flowing out of an outlet is at least partially blown towards the bottom of the heat exchanger.

[00131] As illustrated in FIG. 14, FIG. 15, FIG. 25, and FIG. 27, inlets of the air-cooled channels 90 are located at a lower level than a burning surface of the burner 50. Therefore, a relatively lower air temperature in the air-cooled channels 90 can be ensured. In some embodiments, the inlet of the at least one of the air-cooled channels is located at a lower level than a bottom surface of the burner 50. That is, the air in the air-cooled channels 90 is from cold air directly introduced by the fan assembly 70. The cold air can cool each of the frame 10 and the cover plate 20 during upward flowing of the cold air in the air-cooled channels 90. Therefore, heat radiation from the frame 10 and the cover plate 20 to the outside is reduced. Thus, damage of heat to the components of the gas device 100 is alleviated.

[00132] In some embodiments, as illustrated in FIG. 14, FIG. 15, and FIG. 25 to FIG. 27, at least part of airflow flowing out of outlets of the air-cooled channels 90 is blown towards ends (a left end and a right end) of the heat exchanger 40 to directly and continuously cool the heat exchanger 40. Therefore, the heat dissipated from the heat exchanger 40 to the outside is reduced through the end plates. Thus, damage to electronic components of the gas device 100 due to the heat is avoided. In addition, due to the arrangement positions of the inlets and the outlets of the air-cooled channels 90, the air-cooled channels 90 extends from the lower part of the mounting cavity to the upper part of the mounting cavity to cool the frame 10 and the cover plate 20 in a greater range. For example, at least a part of the burner 50 is located in a region enclosed by the air-cooled channels 90, and a region between the burner 50 and the heat exchanger 40 is also located in the region enclosed by the air-cooled channels 90. In this way, a cooling effect is greatly improved.

[00133] In some embodiments, the cooling heat insulation plates include first cooling heat insulation plates. The first cooling heat insulation plates are arranged at interval on a left side plate and/or a right side plate of the frame to formfirst air-cooled channels. Each of the first air-cooled channels has an inlet on a bottom of the first air-cooled channel and an outlet on top of the first air-cooled channel. The cooling heat insulation plates further include second cooling heat insulation plates arranged at intervals on a rear side plate of the frame and/or the cover plate to form second air-cooled channels. Each of the second cooling heat insulation plates has a plurality of outlets vertically arranged at intervals.

[00134] As illustrated in FIG. 14 and FIG. 25 to FIG. 26, the air-cooled channels 90 include first air-cooled channels 91. The cooling heat insulation plates 80 includes first cooling heat insulation plates 81 arranged at intervals on at least one of the left side plate 12 and the right side plate 14 of the frame 10 to define the first air-cooled channels 91. That is, at least one of the left side plate and the right side plate of the mounting cavity has thefirst air-cooled channels 91. A bottom of the first air-cooled channel 91 has inlets 911, and top of thefirst air-cooled channels 91 has outlets 922. That is, the cold air enters from the bottom and exits from the top. On one hand, the left side plate 12 and the right side plate 14 of the frame 10 are far away from flame of the burner 50 and thus have a relatively low temperature, and the temperature of the left side plate 12 and the right side plate 14 can be reduced by the cold air flowing directly in the first air-cooled channels 91 through a convection heat exchange principle. On the other hand, the air in the first air-cooled channels 91 can all flow out of the outlets 912 at the top to be directly blown to both ends of the heat exchanger 40. Therefore, a low-temperature airflow layer is formed on the two ends of the heat exchanger 40 to continuously cool the two ends of the heat exchanger 40. In this way, the heat dissipated by the left end plate 41 and the right end plate 42 of the heat exchanger 40 is reduced. As a result, the damage of the heat to the electronic

'21 components of the gas device 100 is reduced.

[00135] In some embodiments of the present disclosure, the first cooling heat insulation plates 81 extend towards the lower part of the left side plate 12 and/or the right side plate 14 of the frame 10 to the bottom of the burner 50, and therefore the inlets of the first air-cooled channels 91 are located at a lower level than the bottom surface of the burner 50, or the inlets of the first air-cooled channels 91 are located flush with the bottom surface of the burner 50. Thus, the relatively low air temperature in the first air-cooled channels 91 is ensured. In some embodiments, the air in the air-cooled channels 90 is from cold air directly introduced by the fan assembly 70. The cold air can cool each of the frame 10 and the cover plate 20 during the upward flowing of the cold air in the air-cool channels 90. Therefore, the heat radiation from the frame 10 and the cover plate 20 to the outside is reduced. Thus, the damage of the heat to the components of the gas device 100 is reduced.

[00136] In some embodiments, each of the second cooling heat insulation plates has a plurality of interception sections. Each of the plurality of interception sections has a transverse extending segment extending from inside to outside and a longitudinal extending segment bent upwards and extending obliquely. A starting end of the longitudinal extending segment is connected to an outer end of the transverse extending segment. The outlets of the second air cooled channel are formed on each of the plurality of interception sections. In some embodiments, the outlets of the second air-cooled channels are formed as elongated air outlets on each of the plurality of interception sections. A lowermost first layer of interception sections of the second cooling heat insulation plate close to a back side of the frame is located at a lower level than a lowermost first layer of interception sections of the second cooling heat insulation plates on the front side, and therefore a firs layer of air outlets of the air-cooled channels close to the frame at the back side is located at relatively lower level. Further, air outlets of a second layer of interception sections of the second cooling heat insulation plates at the front side are located at a higher level than air outlets of a second layer of interception sections of the second cooling heat insulation plates at the rear side, and air outlets of a third layer of interception sections of the second cooling heat insulation plates at the front side are located at a higher level than air outlets of a third layer of interception sections of the second cooling heat insulation plates at the rear side. A spacing between layers of interception sections of the second cooling heat insulation plates at the rear side is greater than a spacing between layers of interception sections of the second cooling heat insulation plates at the front side, or at least one spacing of a plurality of spacings between layers of interception sections of the second cooling heat insulation plates at the rear side is greater than a spacing between the interception sections of the second cooling heat insulation plates at the front side. In this way, the air outlets of the second cooling heat insulation plates at the front side and the rear side are staggered with each other. As a result, the noise is avoided due to direct collision of the airflow in the cavity. In addition, the burning chamber can be better cooled.

[00137] As illustrated in FIG. 6, FIG. 7, FIG. 14 to FIG. 16, FIG. 21, FIG. 22, and FIG. 25 to FIG. 27, the air-cooled channels 90 include second air-cooled channels 92. The cooling heat

insulation plates 80 include second cooling heat insulation plates 82 arranged at intervals on at

least one of the rear side plate 13 of the frame 10 and the cover plate 20 to define the second

air-cooled channels 92. That is, the second air-cooled channels 92 are formed on at least one of

the rear side plate 13 of the mounting cavity and the cover plate 20 to implement the cooling

from at least one of the front side and the rear side of the burning chamber. A bottom of the

second air-cooled channel 92 has inlets 921. Each of the second cooling heat insulation plates

82 has a plurality of outlets 922 vertically arranged at intervals, to enable air in the second air

cooled channels 92 to flow from the outlets 922 located at different levels to inside of the second

cooling heat insulation plates 82. In this way, at least part of the cold air can be form as an air

film protection layer on the inner sides of the second cooling heat insulation plates 82, and the

high-temperature smoke gas is isolated by the air film protection layer. As a result, the

temperature is prevented from being conducted to the outside, and thus a temperature of the

wall surfaces is reduced.

[00138] In some embodiments, three layers of interception sections are arranged on the

second cooling heat insulation plate. Five elongated air outlets are formed on a lower layer of

interception sections. Four elongated air outlets are formed on a middle layer of interception

sections. Five elongated air outlets are formed on an upper layer of interception sections. That

is, the number of the air outlets on the middle layer of interception sections may be smaller than

the number of the air outlets on the upper layer of interception sections and on the lower layer

of interception sections to reduce resistance of the air outlets on the middle layer of interception

'21 sections. In this way, the burning chamber is better cooled.

[00139] For example, as illustrated in FIG. 6, FIG. 7, FIG. 14 to FIG. 16, FIG. 21, FIG. 22, and FIG. 25 to FIG. 27, the second cooling heat insulation plate 82 extends towards the bottom of the rear side plate 13 of the frame 11. Further, a gap between the second cooling heat insulation plate 82 and the rear side plate 13 of the frame 11 is formed as a back air inlet of the second cooling channel 92, and the back air inlet is formed close to a bottom side plate of the burner 50. Therefore, the second cooling channel 92 can guide air with a lower temperature at a lower part of the burning chamber upwards as much as possible. In this way, the rear side plate 13 of the frame 11 can be better cooled. As a result, the damage of the heat to the electronic elements of the gas device 100 can better avoided.

[00140] For example, as illustrated in FIG. 6, FIG. 7, FIG. 14 to FIG. 16, FIG. 21, FIG. 22, and FIG. 25 to FIG. 27, the second cooling heat insulation plate 82 extends towards the lower part of the cover plate 20. Further, a gap between the second cooling heat insulation plate 11 and the cover plate 20 is formed as a front side air inlet of the second air-cooled channel 92 located at a higher level than the back air inlet. Therefore, the downward extending end portion of the second cooling heat insulation plate 82 engaged with the cover plate 20 is smaller than the downward extending end of the second cooling heat insulation plate 82 engaged with the rear side plate 13 of the frame body 11. In this way, it is possible to prevent the second cooling heat insulation plate 82 located at the front side from interfacing with the mounting of other structures such as the gas dispensing rod 32 can be avoided while ensuring a relatively low temperature of the inlet air.

[00141] In some embodiments, as illustrated in FIG. 6, FIG. 7, FIG. 14 to FIG. 16, FIG. 21, FIG. 22, and FIG. 25 to FIG. 27, each of the second cooling heat insulation plates 82 has a plurality of interception sections 821. Each of the plurality of interception sections 821 has a transverse extending segment 822 extending from inside to outside and a longitudinal extending segment 823 bent upwards and extending obliquely. A starting end of the longitudinal extending segment 823 is connected to an outer end (i.e., a terminal end) of the transverse extending segment 822. The longitudinal extending segment 823 is bent upwards and extends obliquely. The outlets 922 of the second air-cooled channel 92 are formed on each of the plurality of interception sections 821. That is, the cold air in the second air-cooled channel 92 is brunched through the plurality of interception sections 821, flows out of the outlets 922 of each of the plurality of interception sections 821, and dispersed in the inner wall surface region of the second cooling heat insulation plate 82. Therefore, the air film protection layer with a better distribution effect are constantly formed on the inner wall surfaces of the second cooling heat insulating plates 82 to block the heat radiation to the outside. Therefore, the influence of the heat on the components of the gas device 100 is reduced.

[00142] In some embodiments of the present disclosure, as illustrated in FIG. 15, FIG. 16 and FIG. 27, the outlets 922 of the second air-cooled channel 92 are formed on each of the

transverse extending segments 822 and have openings facing upwards. Therefore, the air

flowing out of the outlets 922 of the second air-cooled channel 92 has an upward flowing trend.

Thus, it is beneficial to the formation of the air film protection layer on the inner wall surfaces

of the second cooling heat insulation plates 82 to reduce the heat radiation to the outside. It

should be noted that the transverse extension section 822 may extend in a horizontal direction,

or may extend in a direction oblique to the horizontal direction, and the openings of the outlets

922 of the second air-cooled channel 92 may face vertically upwards or obliquely upwards,

which are within the scope of the present disclosure.

[00143] In addition, as illustrated in FIG. 16, the longitudinal extending segments 823

extends upwards and inwards, to enable air flowing out of the outlets 922 on the transverse

extending segment 822 to be directly blown to the inclined longitudinal extending segment 823.

Thus, more air is formed as the air film protection layer due to the guiding of the longitudinal

extending segment 823. Thus, the heat insulation effect can be enhanced.

[00144] In some embodiments of the present disclosure, as illustrated in FIG. 14, FIG. 15,

and FIG. 27, the heat exchanger 40 is surrounded by some of a plurality of second air-cooled

channels to isolate the heat exchanger 40 from the outside. Therefore, the heat radiation from

the region where the heat exchanger 40 is located to the outside is reduced. Thus, the damage

of the heat to the electronic components of the gas device 100 is avoided.

[00145] In some embodiments, as illustrated in FIG. 27, a flow path of the airflow in the

second air-cooled channel is located at a higher level than the bottom surface of the heat

exchanger 40.

[00146] In some embodiments of the present disclosure, as illustrated in FIG. 14 to FIG. 16, a connection between the transverse extending segment 822 and the longitudinal extending segment 823 of an uppermost interception section 821 of the plurality of interception sections

821 is in contactable engagement with the corresponding rear side plate 13 of the frame 10 (or

the cover plate 20) to form an air heat insulation layer on an upper side (a part corresponding

to the side wall of the heat exchanger) of the second cooling heat insulation plates. A connection

between the transverse extending segment 822 and the longitudinal extending segment 823 of

each of the remaining interception sections 821 of the plurality of interception sections 821 is

spaced apart from the corresponding rear side plate 13 of the frame 10 (or the cover plate 20)

to form a cooling channel in a gap between the second cooling heat insulation plate and a back

plate of the frame or the cover plate.

[00147] Three interception sections 821 located on an inner side of the rear side plate 13 of the frame 10 will be described as an example. After the cold air enters from the inlets 921 of

the second air-cooled channels 92, the cold air flows upwards through the second air-cooled

channels 92. After reaching the outlet 922 of the lowermost interception section 821, the cold

air is partially blown to the longitudinal extending segment 823 of the lowermost interception

section 821 to form a gas film protection layer. In this way, the high-temperature smoke gas can

be isolated through the gas film protection layer to prevent radiation of the temperature to the

outside. The remaining cold air continues to flow upwards, and is partially blown to the

longitudinal extending segment 823 of the middle interception section 821 of the three

interception sections 821 to form an air film protection layer after reaching the outlet 922 of the

middle intercepting section 821. The remaining cold air continues to flow upwards and reaches

the outlet 922 of an uppermost interception section 821. Since the uppermost interception

section 821 is tightly attached to the rear side plate 13 of the frame 10, the interception effect is

realized. The cold air enters the burning chamber from the outlets 922 of the uppermost

interception section 821, and all the cold air flows out and is blown to the longitudinal extending

segment 823 of the uppermost interception section 821 to form the gas film protection layer.

[00148] A flow path and a cooling manner of interception sections 821 of other numbers and

the second air-cooled channels 92 disposed on the inner side of the cover plate 20 are similar

to those in the above-mentioned embodiments, and details thereof will be omitted herein. The

cold air in the second air-cooled channels 92 can be completely blown out through the interception effect of the uppermost interception section 821. In this way, it is possible to prevent heat insolation from being affected due to accumulation of cold air on the upper part of the second air-cooled channels 92.

[00149] In some embodiments, as illustrated in FIG. 15 to FIG. 16, the outlet 922 of the uppermost interception section 821 may be located at a lower level than the heat exchanger 40,

and an upper end of the longitudinal extending segment 823 of the uppermost interception

section 821 is located at a higher level than or a same level as the lower end of the heat

exchanger 40. Therefore, the cold air blown out of the outlet 922 of the interception section 821

is formed as the air film protection layer on the longitudinal extending segment 823, then flows

upwards to the ends of the heat exchanger 40 under a guiding of the longitudinal extending

segment 823, to cool the ends of the heat exchanger 40. In this way, the heat radiation to the

outside from the left end plate 41 and the right end plate 42 of the heat exchanger 40 can be

avoided. As a result, the heat insulation effect is further enhanced.

[00150] In some embodiments of the present disclosure, as illustrated in FIG. 15 and FIG.

27, the second cooling heat insulation plate 82 extends towards the rear side plate 13 of the

frame 11 and/or the top of the cover plate 20 to the top of the heat exchanger 40, to form a heat

insulation portion 93 on each of a front side surface and a rear side surface of the heat exchanger

40. In an example in which a plurality of interception sections 821 is included, as illustrated in

FIG. 15 and FIG. 27, the heat isolation portion 93 is formed between the second cooling heat

isolation plat 82 and at least one of the cover plate 20 and the rear side plate 13 of the frame 11.

The heat isolation portion 93 is located on an upper side of the second air-cooled channel 92

and is connected to the longitudinal extending segment 823 of the uppermost interception

section 821. Thus, the structure is simplified, and the space is fully utilized. In addition, the

heat insulation portion 93 is located on a periphery of the heat exchanger 40, and the heat

exchanger 40 can be isolated from the outside by the heat insulation portion 93. Therefore, the

heat radiation from the region where the heat exchanger 40 is located to the outside is reduced.

Thus, the damage of the heat to the electronic components of the gas device 100 is avoided.

[00151] In some embodiments, as illustrated in FIG. 15 and FIG. 27, the heat insulation

portion 93 is an air heat insulation layer, and the air heat insulation layer may be defined by

cooperation between the upper part of the second cooling heat insulation plate 82 and the cover

'1 7 plate 20 (or the rear side plate 13). Therefore, the structure of the device is simplified. In some embodiments, a connection between the transverse extending segment 822 and the longitudinal extending segment 823 of the uppermost interception section 821 may be in contactable engagement with and the cover plate 20 (or the rear side plate 13) of the frame 11 at a lower end of the air heat insulation layer.

[00152] In addition, the air heat insulation layer is in no communication with the second air cooled channel 92 to prevent the airflow in the second air-cooled channel 92 from flow into the

air heat insulation layer, which may affect the formation of the air film layer on the inner side

of the second cooling heat insulation plate 82.

[00153] In some embodiments of the present disclosure, as illustrated in FIG. 6 and FIG. 21,

a left support flange (as illustrated in FIG. 6, a flange for arranging the second connection

portion 16, or a second connection portion 16 as illustrated in FIG. 21) is disposed on the left

side plate 12 of the frame 10 to support the left end plate 41 of the heat exchanger 40. Further,

the outlet 912 of the first air-cooled channel 91 corresponding to the left side plate 12 of the

frame 10 may be flush with the left support flange, to enable the airflow flowing out of the first

air-cool channel 91 to be blown towards the left end plate 41 of the heat exchanger 40 directly.

In this way, the cooling effect on the right end plate 41 is better.

[00154] In some embodiments of the present disclosure, as illustrated in FIG. 6 and FIG. 21, a right support flange is disposed on the right side plate 14 of the frame 10 to support the right

end plate 42 of the heat exchanger 40. Further, the outlet 912 of the first air-cooled channel 91

corresponding to the right side plate 14 of the frame 10 may be flush with the right support

flange, to enable the airflow flowing out of the first air-cooled channel 91 to be blown towards

the right end plate 42 of the heat exchanger 40 directly. In this way, the cooling effect on the

right end plate 42 is better.

[00155] In some embodiments of the present disclosure, as illustrated in FIG. 14, the

mounting cavity includes a first cavity and a second cavity. The first cavity is located between

the bottom side plate 51 of the burner 50 and the bottom plate 15 of the frame 10, and the second

cavity is located between the burner 50 and the heat exchanger 40. In this way, each of the first

cavity and the second cavity is located between the two first cooling heat insulation plates 81

engaged respectively with the left side plate 12 and the right side plate 14 of the frame 10. In addition, the air outlet of the fan assembly 70 is in communication with a middle part of the first cavity. The air outlet of the fan assembly 70, the first cavity, the burner 50, the second cavity, and the heat exchanger 40 are sequentially arranged from bottom to top.

[00156] Correspondingly, the first air-cooled channel 91 extends from bottom to top, and therefore the inlet 911 of the first air-cooled channel 91 is in direct communication with the first cavity, and the outlet 912 of the first air-cooled channel 91 is in communication with top of the second cavity. Airflow entering the first cavity may partially flow upwards through the first air cooled channel 91 and flow to the top of the second cavity. On the one hand, gas in the first cavity is cold air directly flowing from the air outlet of the fan assembly 70, and the first air cooled channel 91 is in direct communication with the first cavity. Therefore, the air in the air cooled channels 90 is from the cold air directly introduced by the fan assembly 70. The cold air can cool the frame 10 during the upward flowing of the cold air in the air-cool channels 90. Thus, the heat radiation from the frame 10 to the outside is reduced. As a result, the damage of the heat to the components of the gas device 100 is reduced. On the other hand, the outlet 912 of the first air-cooled channel 91 directly extends to the top of the second cavity, and therefore the first air-cooled channel has a wider coverage in a longitudinal direction of the frame 10. Thus, the effect of reducing the heat radiation is better. In addition, a smaller spacing is formed between the outlet 912 of the first air-cooled channel 91 and the ends of the heat exchanger 40, to enable the airflow blown through the outlet 912 of the first air-cooled channel 91 to be more fully blown to the bottom of each of the left end plate 41 and the right end plate 42 of the heat exchanger 40. In this way, the effect of preventing the heat of the high-temperature smoke gas from approaching the left end plate 41 and the right end plate 42 is improved. As a result, an effect of reducing thermal fatigue of heat exchange pipes of the heat exchanger 40 is better. Further, an effect of avoiding cracks generated at the welding between the heat exchange pipes and the left end plate 41 and the right end plate 42 is better. Furthermore, it is possible to prevent a water seepage phenomenon of the heat exchange pipes is better.

[00157] In some embodiments of the present disclosure, as illustrated in FIG. 14 and FIG. 15, the mounting cavity includes a first cavity and a second cavity. The first cavity is located between the bottom side plate 51 of the burner 50 and the bottom plate 15 of the frame 10, and the second cavity is located between the burner 50 and the heat exchanger 40, to position each

'20 of the first cavity and the second cavity between two second cooling heat insulation plates 82 engaged with the cover plate 20 and the rear side plate 13 of the frame 10. In addition, the air outlet of the fan assembly 70 is in communication with the middle part of the first cavity. The air outlet of the fan assembly 70, the first cavity, the burner 50, the second cavity, and the heat exchanger 40 are sequentially arranged from bottom to top.

[00158] Correspondingly, the second air-cooled channel 92 extends from bottom to top. A front air inlet of the second air-cooled channel 92 corresponding to the cover plate 20 is located

in a middle part of the burner 50. A rear air inlet of the second air-cooled channel 92

corresponding to the rear side plate 13 of the frame 10 is flush with the bottom side plate 51 of

the burner 50. Therefore, each of the inlets 921 of the two second air-cooled channels 92 is in

communication with the first cavity. The outlets 922 of the second air-cooled channels 92 are

located in a middle part of the second cooling heat insulation plate 82, rather than at the top of

the second cooling heat insulation plate 82. Therefore, the outflow can continue to flow upwards

to facilitate the formation of the air film layer on the inner side of the second cooling heat

insulation plate 82. Further, in some embodiments, the outlets 922 of the second air-cooled

channel 92 are in communication with different regions in the second cavity at several

longitudinal positions in a longitudinal direction. The airflow entering the first cavity may

partially flow upwards through the second air-cooled channels 92 and flow to the several

longitudinal positions in the second cavity. On the one hand, the gas in the first cavity is the

cold air directly flowing through the air outlet of the fan assembly 70, and the first air-cooled

channel 91 is in direct communication with the first cavity. Therefore, the air in the air-cooled

channels 90 is from the cold air directly introduced by the fan assembly 70. The cold air can

cool the frame 10 during the upward flowing of the cold air in the air-cool channels 90. Thus,

the heat radiation from the frame 10 to the outside is reduced. As a result, the damage of the

heat to the components of the gas device 100 is reduced. On the other hand, compared with the

left side plate 12 and the right side plate 14 of the frame 10, the cover plate 20 and the rear side

plate 13 of the frame 10 are located closer to fire rows of the burner 50. Therefore, each of the

cover plate 20 and the rear side plate 13 of the frame 10 has a relatively high temperature. The

outlets of the second air-cooled channel 92 are arranged at different levels of the second cooling

heat insulation plates 82 corresponding to the rear side plate 13 of the cover plate 20 and the frame 10, to enable the cold air to be blown out from different levels to ensure the formation of the air film layer on the whole inner surface of the second cooling heat insulation plate 82. In this way, the heat radiation to the outside through the second cooling heat insulation plate 82 and the frame 10 is blocked more completely and effectively. As a result, the influence of heat on the components of the gas device 100 is reduced. In some embodiments of the present disclosure, the burner has a bottom side plate. A left side and a right side of the bottom side plate of the burner are formed as flanges extending downwards and in contact engagement with the first cooling heat insulation plates arranged at intervals on the left side and the right side of the frame. The first cooling heat insulation plate extends towards the bottom of the frame, and therefore the air inlet of the first air-cooled channel is located at a lower part of the bottom side plate of the burner. Correspondingly, the first air-cooled channel 91 extends from bottom to top, and therefore the inlet 911 of the first air-cooled channel 91 is in direct communication with the first cavity.

[00159] As illustrated in FIG. 15 and FIG. 27, the burner 50 has a bottom side plate 51. A burner flange 52 is disposed on a rear end of the bottom side plate 51 and extends downwards. The burner flange 52 is attached to the rear side plate of the frame 10 to fix the burner 50. For example, the burner flange 52 and the rear side plate 13 of the frame 10 can be locked together by a fastener. In this way, a frontal assembling or a back assembling of the burner 50 can be realized, and the assembling efficiency is improved. A lower end of the second cooling heat insulation plate 82 is in clearance fit with the bottom side plate 51. For example, the lower end of the second cooling heat insulation plate 82 is in seal fit with the bottom side plate 51, or is spaced apart from the bottom side plate 51 by a small gap. A through hole is formed on the bottom side plate 51 and is in communication with the inlet 921 of the second air-cooled channel 92.

[00160] Therefore, the second air-cooled channel 92 is defined between the second cooling heat insulation plate 82 and the rear side plate 13 of the frame 10. In addition, the through hole on the bottom side plate 51 is in communication with the second air-cooled channel 92 to prevent the air inlet structure of the second air-cooled channel 92 from interfering with the fixing structure of the burner 50. In this way, the design of the structure is more reasonable.

[00161] In some embodiments of the present disclosure, as illustrated in FIG. 6 and FIG. 21,

Al the left side plate 12, the right side plate 14, and the rear side plate 13 of the frame 10 may be integrally formed to form a frame body. The bottom plate 15 of the frame 10 is connected to a bottom of the frame body, for example is connected through riveting, welding, or by the fastener.

Each of the frame body and the bottom plate 15 of the frame 10 is connected to the cover plate

20 to form a complete housing structure. In this way, the structure is simple without fastening

the screws in several directions. As a result, the assembling process is simplified. In addition,

the integrated frame body is beneficial to improving the sealing performance of the first air

cooled channel 91 and the second air-cooled channel 92. For example, in an embodiment where

the first air-cooled channel 91 and the second air-cooled channel 92 are both included, no gap

is formed between the left side plate 12, the right side plate 14, and the rear side plate 13 of the

frame 10 due to the integrated frame body. In this way, the sealing between the frame body and

each of the first cooling heat insulation plate 81 and the second cooling heat insulation plate 82

can be easily realized.

[00162] In some embodiments, as illustrated in FIG. 6 and FIG. 27, first cooling heat insulation plates 81 are arranged at intervals on each of the left side plate 12 and the right side

plate 14 of the frame 10 to form first air-cooling channels 91. Second cooling heat insulation

plates 82 are arranged at intervals on a rear side plate 13 of the frame 10 to form second air

cooled channels 92. The first cooling heat insulation plates 81 and the second cooling heat

insulation plates 82 are integrally formed to form a U-shaped structure having a substantial

same shape as the frame body, and the two integrated components cooperate with each other to

define two first air-cooled channels 91 and one second air-cooled channel 92. In this way, the

sealing performance of the air-cooled channels is greatly improved. In addition, during the

assembling, no assembling is required among the left side plate 12, the right side plate 14, and

the rear side plate 13 of the frame 10, and likewise no assembling is required between the first

cooling heat insulation plate 81 and the second cooling heat insulation plate 82. The connection

between the integrated cooling heat insulation plates and the frame body can be carried out at

the front side of the frame body. In this way, the assembling process is greatly simplified.

[00163] In some embodiments, as illustrated in FIG. 6, a frame flange 101 is disposed on the

front side edge of the left side plate 12 of the frame 10 and extends leftwards or rightwards, a

frame flange 101 is likewise disposed on the front side edge of the right side plate 14 of the

A') frame 10 and extends leftwards or rightwards, and a bottom plate flange 102 is disposed on the bottom plate 15 of the frame 10 and extends upwards or downwards. Therefore, each of the frame flanges 101 and the bottom plate flange 102 is substantially located in a longitudinal plane in the left-right direction. The cover plate 20 may be connected to the frame flanges 101 and the bottom plate flange 102 by the fastener. The fastener may be a screw, a bolt, etc. Therefore, each of the left side plate 12, the right side plate 14, and the bottom plate 15 of the frame 10 may be assembled with the cover plate 20 at the front side of the frame 10. In this way, the frontal assembling can be realized without fastening the screws for fixing in several directions. In this way, the assembling process is simplified. For example, all fasteners of the cover plate 20 can be simultaneously mounted within a short time by means of the specific tooling equipment to realize the automatic production. As a result, the assembling time is greatly reduced and thus the production efficiency is improved.

[00164] In some embodiments of the present disclosure, as illustrated in FIG. 6, the top edge of the rear side plate 13 of the frame 10 is a flat plate extending in the longitudinal direction, and the draft hood 30 is connected to the flat plate, for example, by means of a fastener. That is, a portion of the rear side plate 13 of the frame 10 for connecting to the draft hood 30 is not a flanging structure bent in the transverse direction. The flat plate is connected to the draft hood 30, and therefore the mounting can be performed at the front side or the rear side of the frame 10 during the assembling. In this way, the assembling process can be simplified.

[00165] A gas water heater according to embodiments of the present disclosure includes the gas device 100 according to the embodiments of the present disclosure. The gas device 100 according to the embodiments of the present disclosure has the above-mentioned beneficial technical effects. Therefore, in the gas water heater according to the embodiments of the present disclosure, the mounting cavity is defined by the frame 10, the draft hood 30, and the cover plate 20, and the burner 50 and the heat exchange components of the heat exchanger 40 are mounted in the mounting cavity. Thus, the plurality of components is integrally arranged. In this way, the assembling structure and the sealing structure are simplified, and thus the production efficiency can be improved to realize automatic production. Further, the heat loss and the leakage of the waste gas during the operation of the gas device can be reduced, which facilitates reducing the energy consumption and improving the safety. In addition, the structures of the components of the gas device are suitable for the frontal mounting and the modularization, and thus the assembling efficiency can be improved.

[00166] In some embodiments, the gas water heater includes a gas heating furnace or a gas wall-mounted furnace.

[00167] Other compositions and operations of the gas device 100 according to the embodiments of the present disclosure are known to those of ordinary skill in the art, and details thereof will be omitted herein. Although the embodiments of the present disclosure have been illustrated and described, those of ordinary skill in the art may understand that various changes, alternatives, and modifications can be made to the embodiments herein without departing from the principle and spirit of the present disclosure. The scope of the present disclosure is defined by the claims and equivalents thereof.

AA

Claims (23)

1. What is claimed is: 1. A gas device, comprising:

   a frame;

   a cover plate covering the frame at a front side;

   a heat exchanger mounted at the frame;

   a draft hood disposed on top of the frame, the frame, the cover plate, an end plate of the

   heat exchanger, and the draft hood cooperatively defining a mounting cavity; and

   a burner fitted in the mounting cavity.
2. 2. The gas device according to claim 1, wherein:

   the frame comprises a left side plate, a rear side plate, a right side plate, and a bottom plate;

   and

   a front portion of the draft hood has a top mounting surface cooperating with an upper end

   portion of the cover plate, the upper end portion of the cover plate being engaged with and

   connected to the top mounting surface.
3. 3. The gas device according to claim 1, wherein:

   the left side plate and the right side plate of the frame are bent to form a first side mounting

   surface engaged with the cover plate;

   the heat exchanger is mounted at upper ends of the left side plate and the right side plate

   of the frame;

   each of a left end plate and a right end plate of the heat exchanger has a second side

   mounting surface engaged with the cover plate; and

   a left edge and a right edge of the cover plate are engaged with and connected to the first

   side mounting surface and the second side mounting surface.
4. 4. The gas apparatus according to claim 1, wherein a bottom plate flange is disposed at a

   bottom plate of the frame and extends upwards or downwards, the bottom plate flange being

   formed as a bottom mounting surface engaged with and connected to a bottom of the cover

   plate.
5. 5. The gas device according to any one of claims 1 to 4, wherein:

   a connection through hole is formed on each of the top mounting surface, the first side

   mounting surface, the second side mounting surface, the bottom mounting surface, and the

   cover plate to allow for connections by fasteners; and/or

   one of a hook and a groove is formed on each of the top mounting surface, the first side

   mounting surface, the second side mounting surface, and the bottom mounting surface, and

   another one of the hook and the groove is formed on the cover plate, to allow for connections

   through a hook-groove structure.
6. 6. The gas device according to claim 1, wherein a rear part of the draft hood has a rear

   mounting surface engaged with top of a rear side plate of the frame, a connection through hole

   being formed on each of the rear mounting surface and the rear side plate of the frame to allow

   for a connection by a fastener.
7. 7. The gas device according to claim 1, wherein the burner has a bottom side plate, a lower

   flange being disposed at a rear end of the bottom side plate and extending downwards, and the

   lower flange being attached to a rear side plate of the frame to form a burner mounting surface

   engaged with the rear side plate of the frame.
8. 8. The gas device according to claim 5, wherein one or more reinforcement structures are

   arranged close to the connection through hole on the cover plate.
9. 9. The gas device according to claim 1, wherein:

   a left side plate and a right side plate of the draft hood are welded to a left end plate and a

   right end plate of the heat exchanger, respectively; or

   a first connection portion is disposed a lower edge of each of the left side plate and the

   right side plate of the draft hood, and a first connection engagement portion is disposed on each

   of a left end plate and a right end plate of the heat exchanger, the first connection portion and

   the first connection engagement portion being snapped with each other through a hook-flange

   structure.
10. 10. The gas device according to claim 1, wherein the frame comprises a left side plate, a

    rear side plate, a right side plate, and a bottom plate, each of the left side plate and the right side

    plate having a smaller height than the rear side plate, a second connection portion being

    disposed on an upper edge of each of the left side plate and the right side plate of the frame, a second connection engagement portion being disposed on a lower edge of each of a left end plate and a right end plate of the heat exchanger, and the second connection portion and the second connection engagement portion being snapped with each other through a hook-flange structure or being engaged with and connected to each other by a fastener.
11. 11. The gas device according to claim 1, further comprising a fan assembly fitted on a bottom plate of the frame and located outside the mounting cavity, wherein: a fan port is formed on the bottom plate of the frame and corresponds to an air outlet of the fan assembly; and a first positioning lug is disposed on the fan assembly, and a second positioning lug is disposed on a bottom surface of the bottom plate and extends downwards, the first positioning lug and the second positioning lug being locked with each other by a fastener.
12. 12. The gas device according to claim 1, wherein: a fan port is formed on a bottom plate of the frame; and cooling heat insulation plates are arranged at intervals on at least one side plate of the mounting cavity to form air-cooled channels in communication with the fan port, an inlet of at least one of the air-cooled channels being located lower than a burning surface of the burner, and airflow flowing out of an outlet being at least partially blown towards a bottom of the heat exchanger.
13. 13. The gas device of claim 12, wherein the cooling heat insulation plates comprise: first cooling heat insulation plates arranged at intervals on a left side plate and/or a right side plate of the frame to form first air-cooled channels, an inlet being formed on a bottom of each of the first air-cooled channels, and an outlet being formed on top of each of the first air cooled channels; and second cooling heat insulation plates arranged at intervals on a rear side plate of the frame and/or the cover plate to form second air-cooled channels, each of the second cooling heat insulation plates having a plurality of outlets vertically arranged at intervals.
14. 14. The gas device according to claim 13, wherein each of the second cooling heat insulation plates has a plurality of interception sections, each of the plurality of interception sections having a transverse extending segment extending from inside to outside and a longitudinal extending segment bent upwards and extending obliquely, a starting end of the

    A 7 longitudinal extending segment being connected to an outer end of the transverse extending segment, and the plurality of outlets of the second air-cooled channel being formed on each of the plurality of interception sections.
15. 15. The gas device according to claim 14, wherein: a connection between a transverse extending segment and a longitudinal extending segment of an uppermost one of the plurality of interception sections of the second heat insulation plate is in contactable engagement with the rear side plate of the frame and/or the cover plate, and a connection between a transverse extending segment and a longitudinal extending segment of each of the remaining interception sections of the plurality of interception sections is spaced apart from the rear side plate of the frame and/or the cover plate; and/or the heat exchanger is surrounded by some of a plurality of second air-cooled channels.
16. 16. The gas device according to claim 13, wherein the second cooling heat insulation plate extends towards the rear side plate of the frame and/or top of the cover plate to a side portion of the heat exchanger to form a heat insulation portion on each of a front side surface and a rear side surface of the heat exchanger.
17. 17. The gas device according to claim 14, wherein a support flange is disposed on the left side plate and/or the right side plate of the frame to support a left end plate and/or a right end plate of the heat exchanger, the outlet of the first air-cooled channel being located close to the support flange and flush with the support flange.
18. 18. The gas device according to claim 13, wherein: the mounting cavity comprises a first cavity located between a bottom side plate of the burner and the bottom plate of the frame and a second cavity located between the burner and the heat exchanger; and the gas device further comprises a fan assembly having an air outlet in communication with the first cavity, airflow entering the first cavity partially flowing upwards to top of the second cavity through the first air-cooled channels and partially flowing upwards to a plurality of longitudinal positions in the second cavity through the second air-cooled channels.
19. 19. The gas device according to claim 14, wherein: a left side and a right side of a bottom side plate of the burner are formed into flanges extending downwards and in contactable engagement with the first cooling heat insulation

    AQ plates arranged at intervals on the left side and the right side of the frame; and the air inlet of the first air-cooled channel is formed on a lower part of the bottom side plate of the burner.
20. 20. The gas device according to claim 13, wherein: a lower end of the second cooling heat insulation plate is in clearance fit with a rear part of a bottom side plate of the burner; and a through hole is formed on the bottom side plate and is in communication with an inlet of the second air-cooled channel.
21. 21. The gas device according to claim 1, wherein a left side plate, a right side plate, and a rear side plate of the frame are integrally formed into a frame body, a bottom plate of the frame being connected to a bottom of the frame body, and the cover plate being connected to the frame body and a bottom plate of the frame.
22. 22. The gas device according to claim 1, wherein: first cooling heat insulation plates are arranged at intervals on each of a left side plate and a right side plate of the frame to form first air-cooled channels; and second cooling heat insulation plates are arranged at intervals on a rear side plate of the frame to form second air-cooled channels, the first cooling heat insulation plates and the second cooling heat insulation plates being integrally formed.
23. 23. A gas water heater, comprising the gas device according to any one of claims I to 22.

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