Gas appliances and gas water heaters

Abstract

This invention discloses a gas-fired device, comprising: a frame, a cover plate, a fume hood, and a heat exchanger. The cover plate covers the frame from the front, the heat exchanger is mounted on the frame, and the fume hood is located on the top of the frame. The frame, the cover plate, the end plate of the heat exchanger, and the fume hood cooperate to define an installation cavity. A burner is also included, and the burner is assembled within the installation cavity. According to this invention, the gas-fired device, with its frame, fume hood, and cover plate defining the installation cavity, and the heat exchange components of the burner and heat exchanger installed within the installation cavity, integrates multiple components, simplifying the assembly and sealing structures. This improves production efficiency, enables automated production, and reduces heat loss and exhaust leakage during operation, thus reducing energy consumption and improving safety. Furthermore, the structure of each component of the gas-fired device is suitable for front mounting and modular design, improving assembly efficiency.

Description

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese Patent Application No. 202120120973.4, filed on January 15, 2021, by Wuhu Midea Kitchen & Bath Appliances Manufacturing Co., Ltd. and Midea Group Co., Ltd., the entire contents of which are incorporated herein by reference. Technical Field

[0003] This invention relates to the field of water heater technology, and more specifically, to a gas appliance and a gas water heater. Background Technology

[0004] In related technologies, the burners, heat exchangers, fume hoods, and fans of gas equipment are usually assembled independently, requiring assembly from multiple directions and angles, and necessitating the use of numerous screws for fixing and sealing. This complex assembly method is difficult to automate, resulting in low production efficiency and inconvenient after-sales maintenance. Summary of the Invention

[0005] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one object of the present invention is to provide a gas-fired device in which multiple components are integrated, simplifying the assembly and sealing structure and improving production efficiency.

[0006] The present invention also proposes a gas water heater having the above-mentioned gas equipment.

[0007] According to an embodiment of the present invention, a gas appliance includes: a frame, a cover plate, a fume hood, and a heat exchanger, wherein the cover plate is disposed on the frame from the front, the heat exchanger is mounted on the frame, the fume hood is disposed on the top of the frame, and the frame, the cover plate, the end plate of the heat exchanger, and the fume hood cooperate to define an installation cavity; and a burner is assembled in the installation cavity.

[0008] According to embodiments of the present invention, the gas equipment defines an installation cavity by means of a frame, a fume hood, and a cover plate. The heat exchange components of the burner and heat exchanger are installed within the installation cavity, integrating multiple components and simplifying the assembly and sealing structures. This improves production efficiency, enables automated production, and reduces heat loss and exhaust gas leakage during operation, thus lowering energy consumption and improving safety. Furthermore, the structure of each component of the gas equipment is suitable for front-mounted installation and modular design, improving assembly efficiency.

[0009] According to some embodiments of the present invention, the frame includes a left side plate, a rear side plate, a right side plate, and a bottom plate, and the front part of the smoke hood has a top mounting surface that mates with the upper end of the cover plate, and the upper end of the cover plate is connected to the top mounting surface.

[0010] According to some embodiments of the present invention, the left and right side plates of the frame are bent to form a first side mounting surface that mates with the cover plate. The heat exchanger is mounted on the upper end of the left and right side plates of the frame, and a second side mounting surface that mates with the cover plate is formed on the left and right end plates of the heat exchanger. The left and right edges of the cover plate are connected to the first side mounting surface and the second side mounting surface.

[0011] According to some embodiments of the present invention, the bottom plate of the frame is provided with an upward or downward extending bottom plate flange, the bottom plate flange forming a bottom mounting surface, and the bottom of the cover plate is connected to the bottom mounting surface.

[0012] According to some embodiments of the present invention, the top mounting surface, the first side mounting surface, the second side mounting surface and the bottom mounting surface are provided with connecting through holes between them and the cover plate for connection by fasteners; and / or, the top mounting surface, the first side mounting surface, the second side mounting surface and the bottom mounting surface are provided with hooks or grooves between them and the cover plate for connection by hook and groove structure.

[0013] According to some embodiments of the present invention, the rear part of the smoke hood is formed with a rear mounting surface that mates with the top of the rear side plate of the frame, and a connecting through hole is provided between the rear mounting surface and the rear side plate for connection by fasteners.

[0014] According to some embodiments of the present invention, the burner has a bottom side plate, the rear end of which is provided with a downwardly extending flange, the flange being fitted with the rear side plate of the frame to form a burner mounting surface that mates with the rear side plate of the frame.

[0015] According to some embodiments of the present invention, the cover plate is provided with one or more reinforcing structures disposed near the connecting through hole.

[0016] According to some embodiments of the present invention, the left side plate and the right side plate of the fume hood are respectively welded to the left end plate and the right end plate of the heat exchanger; or, the lower edge of the left side plate and the lower edge of the right side plate of the fume hood are provided with a first connecting part, and the left end plate and the right end plate of the heat exchanger are provided with a first connecting mating part, wherein the first connecting part and the first connecting mating part are engaged by a hook and a flange.

[0017] According to some embodiments of the present invention, the frame includes a left side plate, a rear side plate, a right side plate, and a bottom plate. The height of the left side plate and the right side plate is lower than the height of the rear side plate. The upper edge of the left side plate and the upper edge of the right side plate of the frame are provided with a second connecting part. The lower edge of the left end plate and the lower edge of the right end plate of the heat exchanger are provided with a second connecting mating part. The second connecting part and the second connecting mating part are connected by hooks and flanges or by fasteners.

[0018] According to some embodiments of the present invention, a fan assembly is mounted on the bottom plate of the frame and located outside the mounting cavity. The bottom plate of the frame is provided with a fan interface. The air outlet of the fan assembly corresponds to the fan interface. The fan assembly is provided with a first positioning lug. The bottom surface of the bottom plate extends downward to provide a second positioning lug. The first positioning lug and the second positioning lug are locked together by fasteners.

[0019] According to some embodiments of the present invention, the bottom plate of the frame is provided with a fan interface, and at least one side plate of the mounting cavity is provided with a cooling heat insulation plate at intervals, thereby forming an air-cooling channel. The air-cooling channel is connected to the fan interface. The inlet of the at least one air-cooling channel is lower than the combustion surface of the burner, and at least a portion of the airflow flowing out of the outlet blows toward the bottom of the heat exchanger.

[0020] According to some embodiments of the present invention, the cooling heat insulation plate includes a first cooling heat insulation plate, wherein the left side plate and / or right side plate of the frame are provided with the first cooling heat insulation plate at intervals to define a first air cooling channel, the first air cooling channel having an inlet at the bottom and an outlet at the top; the cooling heat insulation plate includes a second cooling heat insulation plate, wherein the rear side plate of the frame and / or the cover plate are provided with the second cooling heat insulation plate at intervals to define a second air cooling channel, the second cooling heat insulation plate having a plurality of outlets distributed vertically at intervals.

[0021] According to some embodiments of the present invention, the second cooling heat insulation plate has a plurality of intercepting sections, each intercepting section having a lateral extension section and a longitudinal extension section, the lateral extension section extending from the inside to the outside, the starting end of the longitudinal extension section being connected to the outer end of the lateral extension section, the longitudinal extension section extending upward at an angle, and each intercepting section having an outlet of the second air-cooling channel.

[0022] According to some embodiments of the present invention, the connection between the lateral extension and the longitudinal extension of the uppermost intercepting section on the second heat insulation plate contacts and engages with the rear side plate of the frame and / or the cover plate, while the connection between the lateral extension and the longitudinal extension of the other intercepting sections is spaced apart from the rear side plate of the frame and / or the cover plate; and / or, a portion of a plurality of the second cold air channels surrounds the outer periphery of the heat exchanger.

[0023] According to some embodiments of the present invention, the second cooling heat insulation plate extends toward the rear side plate of the frame and / or the top of the cover plate to the side of the heat exchanger to form a heat insulation portion on the front and rear sides of the heat exchanger.

[0024] According to some embodiments of the present invention, the left side plate of the frame is provided with a left support flange supporting the left end plate of the heat exchanger, and the outlet of the first air-cooling channel corresponding to the left side plate of the frame is flush with the height of the left support flange; the right side plate of the frame is provided with a right support flange supporting the right end plate of the heat exchanger, and the outlet of the first air-cooling channel corresponding to the right side plate of the frame is flush with the height of the right support flange.

[0025] According to some embodiments of the present invention, the mounting cavity includes a first chamber located between the bottom side plate of the burner and the bottom plate of the frame, and a second chamber located between the burner and the heat exchanger. The gas equipment includes a fan assembly, the air outlet of which communicates with the middle of the first chamber, and part of the airflow entering the first chamber flows upward to the top of the second chamber through the first air-cooling channel.

[0026] According to some embodiments of the present invention, the mounting cavity includes a first chamber located between the bottom side plate of the burner and the bottom plate of the frame, and a second chamber located between the burner and the heat exchanger. The gas equipment includes a fan assembly, the air outlet of the fan assembly is connected to the middle of the first chamber, and part of the airflow entering the first chamber flows upward through the second air-cooling channel to multiple points along the longitudinal direction of the second chamber.

[0027] According to some embodiments of the present invention, the left and right sides of the bottom side plate of the burner form downwardly extending flanges that cooperate with and contact the first cooling heat insulation plates spaced apart on the left and right sides of the frame, and the air inlet of the first air-cooling channel is located at the lower part of the bottom side plate of the burner.

[0028] According to some embodiments of the present invention, the left side plate, right side plate and rear side plate of the frame are integrally formed into a frame body, the bottom plate of the frame is riveted to the bottom of the frame body, and the cover plate is connected to the frame body and the bottom plate of the frame.

[0029] According to some embodiments of the present invention, the left and right side panels of the frame are respectively provided with a first cooling heat insulation plate to form a first air-cooling channel, and the rear side panel of the frame is provided with a second cooling heat insulation plate to form a second air-cooling channel, wherein the first cooling heat insulation plate and the second cooling heat insulation plate are integrally formed.

[0030] The gas water heater according to an embodiment of the present invention includes a gas appliance according to an embodiment of the present invention.

[0031] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0032] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0033] Figure 1 This is an exploded view of a gas appliance according to some embodiments of the present invention;

[0034] Figure 2 This is a schematic diagram of the structure of a gas appliance according to some embodiments of the present invention;

[0035] Figure 3 yes Figure 2 The center circle shows an enlarged structural diagram at point A.

[0036] Figure 4 This is a schematic diagram of the structure of a smoke hood according to some embodiments of the present invention;

[0037] Figure 5 This is a schematic diagram of the structure of a heat exchanger according to some embodiments of the present invention;

[0038] Figure 6 This is a schematic diagram of the frame structure according to some embodiments of the present invention;

[0039] Figure 7 This is a schematic diagram of the structure of a cover plate according to some embodiments of the present invention;

[0040] Figure 8 This is a schematic diagram of the structure of a burner according to some embodiments of the present invention;

[0041] Figure 9 This is a schematic diagram of the structure of the air distribution bar according to some embodiments of the present invention;

[0042] Figure 10 This is a schematic diagram of the structure of a fan assembly according to some embodiments of the present invention;

[0043] Figure 11 This is a schematic diagram of the structure of a fan assembly according to some embodiments of the present invention;

[0044] Figure 12 This is a schematic diagram of a partial connection structure between the fan assembly and the frame according to some embodiments of the present invention;

[0045] Figure 13 This is a schematic diagram of a partial connection structure between the fan assembly and the frame according to some embodiments of the present invention;

[0046] Figure 14 This is a cross-sectional view of a gas appliance according to some embodiments of the present invention;

[0047] Figure 15 This is a cross-sectional view of a gas appliance according to some embodiments of the present invention;

[0048] Figure 16 yes Figure 15 The enlarged structural diagram at point B is shown in the middle circle.

[0049] Figure 17 This is an exploded view of a gas appliance according to other embodiments of the present invention;

[0050] Figure 18 This is a schematic diagram of the structure of a gas appliance according to other embodiments of the present invention;

[0051] Figure 19 This is a schematic diagram of the structure of a fume hood and a heat exchanger according to other embodiments of the present invention;

[0052] Figure 20 This is a schematic diagram of a partial connection structure between a heat exchanger and a frame according to other embodiments of the present invention;

[0053] Figure 21 This is a schematic diagram of the frame structure according to other embodiments of the present invention;

[0054] Figure 22 This is a schematic diagram of the structure of a cover plate according to other embodiments of the present invention;

[0055] Figure 23 This is a schematic diagram of a partial connection structure between the cover plate and the frame according to other embodiments of the present invention;

[0056] Figure 24 This is a schematic diagram of a partial connection structure between the cover plate and the fume hood according to other embodiments of the present invention;

[0057] Figure 25 This is a cross-sectional view of a gas appliance according to other embodiments of the present invention;

[0058] Figure 26 This is a cross-sectional view of a gas appliance according to other embodiments of the present invention;

[0059] Figure 27 This is a cross-sectional view of a gas appliance according to other embodiments of the present invention.

[0060] Reference numerals: Gas equipment 100; Frame 10; Frame flange 101; Bottom plate flange 102; Sixth connecting through hole 606; First positioning through hole 701; Second positioning through hole 702; Third positioning through hole 703; Positioning flange 11; Left side plate of frame 10 12; Rear side plate of frame 10 13; Right side plate of frame 10 14; Bottom plate of frame 10 15; Recess 151; Second connecting part 16; Fan interface 17; Second positioning lug 18; Strip Positioning hole 19; Cover plate 20; First connecting through hole 601; Second connecting through hole 602; Third connecting through hole 603; First hook 21; Positioning notch 22; Reinforcing rib 23; Limiting flange 24; Limiting notch 241; Fume hood 30; Fourth connecting through hole 604; Fourth positioning through hole 704; First flange 31; First connecting part 32; Top mounting surface 33; Heat exchanger 40; Fifth connecting through hole 605; Fifth positioning through hole 705; Left end plate 4 1; Upper flange 411; Lower flange 412; Front flange 413; Rear flange 414; Right end plate 42; First connecting part 43; Second connecting part 44; First connecting pipe 45; Second connecting pipe 46; Burner 50; Bottom side plate 51; Burner flange 52; Through hole 53; Sixth positioning through hole 706; Seventh connecting through hole 607; Gas distribution rod 60; Eighth connecting 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; intercepting section 821; lateral extension section 822; longitudinal extension section 823; air-cooled channel 90; first air-cooled channel 91; inlet 911 of the first air-cooled channel 91; outlet 912 of the first air-cooled channel 91; second air-cooled channel 92; inlet 921 of the second air-cooled channel 92; outlet 922 of the second air-cooled channel 92; heat insulation part 93. Detailed Implementation

[0061] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0062] The following description, with reference to the accompanying drawings, describes a gas appliance 100 according to an embodiment of the present invention.

[0063] Reference Figures 1-2 and Figures 16-17 As shown, the gas appliance 100 according to an embodiment of the present invention may include: a frame 10, a cover plate 20, a fume hood 30, a heat exchanger 40, and a burner 50.

[0064] Specifically, such as Figures 1-2 and Figures 16-17As shown, the cover plate 20 is installed on the frame 10 from the front, the heat exchanger 40 is mounted on the frame 10, and the fume hood 30 is located on the top of the frame 10, forming a shell structure. It should be noted that "front" and "top" here refer to the orientation shown in the attached drawings, not that each component must have a specific orientation or be constructed and operated in a specific orientation. Of course, the orientation in actual application and assembly can be the same as that shown in the attached drawings. The fume hood 30 is mounted on the top, which facilitates the smoke exhaust function of the gas equipment 100.

[0065] Furthermore, the frame 10, cover plate 20, and end plates of the heat exchanger 40 (such as left end plate 41 and right end plate 42) cooperate with the fume hood 30 to define an installation cavity. The heat exchange components of the heat exchanger 40 are located within the installation cavity, and the burner 50 can be assembled within the installation cavity to construct the structure of the gas equipment 100. That is, the frame 10 constitutes the basic skeleton of the gas equipment 100, and the top and front of the basic skeleton can be opened. The fume hood 30 and cover plate 20 respectively cover different sides of the frame 10. Moreover, the burner 50 and heat exchanger 40 are located within the installation cavity defined by the frame 10, cover plate 20, end plates of the heat exchanger 40, and fume hood 30, integrating all functional components of the gas equipment 100 into the same enclosed space. This facilitates assembly and helps reduce heat loss and exhaust gas leakage during operation, thus reducing energy consumption and improving safety.

[0066] In some embodiments, such as Figure 1 and Figure 17 As shown, the burner 50 is assembled at the bottom of the mounting cavity, and the heat exchanger 40 is assembled at the top of the mounting cavity. The mounting cavity not only provides installation space, but also combustion space and heat exchange space, which simplifies the structure. Furthermore, the combustion and heat exchange paths can be sealed by sealing the mounting cavity. The sealing structure and assembly structure are simpler, which is conducive to improving production efficiency and realizing automated production.

[0067] In some embodiments, such as Figure 6 and Figure 21 As shown, the frame 10 has a top opening and a front opening, allowing the fume hood 30, cover plate 20, burner 50 and heat exchanger 40 to be moved from the top or front to a position that matches the frame 10, facilitating assembly.

[0068] In some embodiments, such as Figure 1 , Figure 6 and Figure 17 , Figure 21 As shown, the shape of the heat exchanger 40 can match the top opening, meaning that when the heat exchanger 40 is installed in the mounting cavity, the top opening of the frame 10 is essentially closed. In some specific embodiments, such as Figure 1 , Figure 6 and Figure 17 , Figure 21 As shown, the end plate of the heat exchanger 40 can be fitted with the frame 10, the cover plate 20 and the fume hood 30 to form part of the shell. The fit between the frame 10, the cover plate 20, the fume hood 30 and the end plate of the heat exchanger 40 can define a sealed cavity, achieving the structural integrity and sealing of the gas equipment 100, while also facilitating the assembly of the heat exchanger 40 and the pipeline connection of the heat exchanger 40.

[0069] like Figure 2 and Figure 18 As shown, the first connecting pipe 45 and the second connecting pipe 46 of the heat exchanger 40 can extend directly from the end plate of the heat exchanger 40 to the outside of the shell without the need to open holes in the frame 10. In some specific embodiments, the first connecting pipe 45 and the second connecting pipe 46 can be connected to the left end plate 41 and the right end plate 42 of the heat exchanger 40 respectively, and are used for the inflow and outflow of the heat exchange medium respectively, making the pipeline installation simpler and more convenient, the heat exchange pipeline distribution simpler, and facilitating more complete heat exchange of the heat exchange medium in the heat exchanger 40.

[0070] In some specific embodiments of the present invention, such as Figures 1-2 and Figures 17-18 As shown, 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. The height of the left side plate 12 and the right side plate 14 is lower than the height of the rear side plate 13, so that the left end plate 41 of the heat exchanger 40 can be installed between the left side plate 12 and the fume hood 30, and the right end plate 42 of the heat exchanger 40 can be installed between the right side plate 14 and the fume hood 30. 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 fume hood 30 are connected to each other to form the left side wall of the gas equipment 100. 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 fume hood 30 are connected to each other to form the right side wall of the gas equipment 100. They rely on each other and have good stability.

[0071] Furthermore, the cover plate 20 is connected to the fume hood 30, the left end plate 41 and right end plate 42 of the heat exchanger 40, the left side plate 12, the right side plate 14, and the bottom plate 15, so that the cover plate 20 can form the front sidewall of the gas equipment 100. After assembly, the cover plate 20 can cover the fume hood 30, the heat exchanger 40, the frame 10, and other structures within the mounting cavity. The front sidewall structure of the gas equipment 100 is complete, making the gas equipment 100 a more complete integral structure. Moreover, the rear side plate 13 of the frame 10 constitutes the rear sidewall of the gas equipment 100. The front sidewall, left sidewall, right sidewall, and rear sidewall of the gas equipment 100 are interconnected and enclosed in a circumferential direction, further improving stability.

[0072] In some embodiments, such as Figure 2 and Figure 18As shown, the upper end of the cover plate 20 is higher than the lower end of the fume hood 30, and the lower part of the cover plate 20 is connected to the lower part of the frame 10, so that the cover plate 20 can more completely cover the fume hood 30, the heat exchanger 40, the frame 10, and the various components inside the mounting cavity, making the appearance of the gas equipment 100 intact. In some specific embodiments, the upper end of the cover plate 20 may be flush with or extend upward beyond the upper end of the front side plate of the fume hood 30, and the lower end of the cover plate 20 may be flush with or extend downward beyond the lower end of the bottom plate 15 of the frame 10, resulting in better integrity.

[0073] In some specific embodiments, such as Figure 1 and Figure 17 As shown, the four edges of the cover plate 20 can each be provided with rearwardly extending limiting flanges 24. The upper limiting flange 24 can be located above the front side plate of the fume hood 30, the left limiting flange 24 can be located to the left of the left side plate 12 of the frame 10, the right limiting flange 24 can be located to the right of the right side plate 14 of the frame 10, and the lower limiting flange 24 can be located below the bottom plate 15 of the frame 10. Thus, the four limiting flanges 24 can limit the cover plate 20 from four different directions, making the cover plate 20 stable in position and facilitating the connection of the cover plate 20 with components such as the frame 10, the fume hood 30, and the heat exchanger 40.

[0074] In some embodiments, such as Figure 3 and Figure 5 As shown, the lower edge of the left end plate 41 of the heat exchanger 40 may be provided with a downward flange 412, and the left limiting flange 24 of the cover plate 20 may be provided with a limiting notch 25. After assembly, the end of the downward flange 412 can be inserted into the limiting notch 25 to further improve the limiting stability of the cover plate 20, the heat exchanger 40, and the frame 10. Of course, the lower edge of the right end plate 42 of the heat exchanger 40 and the right limiting flange 24 of the cover plate 20 can also be limited by the cooperation of the limiting notch 25 and the downward flange 412.

[0075] In some embodiments, the cover plate 20 is detachably connected to the fume hood 30, the left end plate 41 and right end plate 42, the left side plate 12, the right side plate 14 and the bottom plate 15 of the heat exchanger 40, for example by one or more of snap-fit ​​or threaded connections, to facilitate the installation, disassembly and assembly of the internal components and subsequent maintenance.

[0076] According to an embodiment of the present invention, the gas appliance 100 defines an installation cavity by a frame 10, a fume hood 30, and a cover plate 20. The heat exchange components of the burner 50 and the heat exchanger 40 are installed within the installation cavity, integrating multiple components and simplifying the assembly and sealing structures. This improves production efficiency, enables automated production, and reduces heat loss and exhaust gas leakage during operation, thus lowering energy consumption and improving safety. Furthermore, the structure of each component of the gas appliance 100 is suitable for front-mounted installation and modular design, improving assembly efficiency.

[0077] The assembly structure of various components of a gas appliance 100 according to some embodiments of the present invention is described below with reference to the accompanying drawings.

[0078] In some embodiments of the present invention, such as Figures 1-7 As shown, the frame 10 includes a left side plate 12, a rear side plate 13, a right side plate 14, and a bottom plate 15. The front of the fume hood 30 has a top mounting surface 33 that mates with the top of the cover plate 20. The upper end of the cover plate 20 is connected to the top mounting surface 33 at the front of the fume hood 30. This facilitates front mounting of the cover plate 20 and improves assembly efficiency.

[0079] This invention does not impose special restrictions on the connection method between the top mounting surface 33 and the cover plate 20. For example, the upper ends of the top mounting surface 33 and the cover plate 20 may be provided with through holes, through which fasteners can be inserted, so that the two can be connected by fasteners, making front assembly more convenient and quick. For example, one of the upper ends of the top mounting surface 33 and the cover plate 20 may include a hook, and the other may include a flange, so that the two can be engaged by the hook and the flange, resulting in a simple and robust assembly structure.

[0080] In some embodiments of the present invention, such as Figures 1-7 As shown, the left and right side plates of the frame are bent to form a first side mounting surface that mates with the cover plate. The heat exchanger is mounted on the upper end of the left and right side plates of the frame, and a second side mounting surface that mates with the cover plate is formed on the left and right end plates of the heat exchanger. The left and right edges of the cover plate mate with 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 outwards from the mounting cavity to form a mounting surface that mates with the cover plate 20 (e.g., ...). Figure 6 The frame flange 101 shown is used to mount the heat exchanger 40 on the upper ends of the left side plate 12 and right side plate 14 of the frame 10. Mounting portions (such as those for the cover plate 20) are formed on the left end plate 41 and right end plate 42 of the heat exchanger 40 to mate with the cover plate 20. Figure 5 (As shown in the front flange 413). This facilitates the front mounting of the cover plate 20 and improves assembly efficiency.

[0081] This invention does not impose special restrictions on the connection method between the frame 10 and the cover plate 20. For example, the mounting surface and the cover plate 20 may have through holes, through which fasteners can be inserted to allow them to be connected; the mounting part and the cover plate 20 may also have through holes, through which fasteners can be inserted to allow them to be connected, making front assembly more convenient and quick. For example, the mounting surface and the cover plate 20 may be engaged by snap-fit ​​hooks; the mounting part and the cover plate 20 may be connected by snap-fit ​​hooks, resulting in a simple and robust assembly structure.

[0082] In some specific embodiments, such as Figures 1-7 As shown, the front edges of the left side plate 12 and the right side plate 14 of the frame 10 are provided with frame flanges 101 extending to the left or right. The frame flanges 101 are formed as mounting surfaces. In other words, the frame 10 flanges are provided with through holes, hooks, or flanges for snapping, so as to facilitate reliable front mounting of the cover plate 20.

[0083] In some specific embodiments, such as Figures 1-7 and Figures 17-22 As shown, the bottom plate of the frame has an upward or downward extending flange, which forms a bottom mounting surface. The bottom of the cover plate mates with the bottom mounting surface. The bottom plate 15 of the frame 10 has an upward or downward extending flange 102, which is connected to the cover plate 20 by fasteners to lock the cover plate 20 to the frame 10. A connecting through hole is provided between the top mounting surface, the first side mounting surface, the second side mounting surface, and the bottom mounting surface and the cover plate for connection by fasteners; and / or, a hook or groove is provided between the top mounting surface, the first side mounting surface, the second side mounting surface, and the bottom mounting surface and the cover plate for connection by a hook-groove structure.

[0084] In some embodiments of the present invention, such as Figures 1-7 As shown, the rear of the fume hood has a rear mounting surface that mates with the top of the rear side panel of the frame. A connecting through hole is provided between the rear mounting surface and the rear side panel for connection via fasteners. The rear of the fume hood 30 has a rear mounting surface that mates with the rear side panel 13 of the frame 10 (e.g., Figure 4 The rear sidewall of the smoke hood 30 shown), and the rear part of the burner 50 has a burner mounting surface that mates with the rear side plate 13 of the frame 10 (e.g., the rear sidewall of the smoke hood 30). Figure 8 The burner flange 52 is shown. The rear mounting surface, the burner mounting surface, and the rear side plate 13 may have through holes, allowing the rear mounting surface and the rear side plate 13, and the burner mounting surface and the rear side plate 13, to be connected by fasteners. This enables overall installation from either the front or the back, improving assembly efficiency.

[0085] In some embodiments of the present invention, such as Figure 7As shown, due to the aforementioned front-mounted structure, the cover plate, as an independent mounting component, is equipped with one or more reinforcing structures near the connecting through holes during assembly to prevent deformation. Each mounting through hole on the cover plate 20 can be provided with reinforcing ribs 23. These ribs 23 can be formed by sheet metal forming of the cover plate 20. The reinforcing ribs 23 are annular or arc-shaped and are arranged correspondingly around the through holes to improve the structural strength at the through holes, thereby preventing deformation of the cover plate 20 during screw installation.

[0086] In some embodiments of the present invention, such as Figures 1-7 As shown, the cover plate 20 has a first connecting through hole 601, a second connecting through hole 602, and a third connecting through hole 603; the front of the fume hood 30 has a fourth connecting through hole 604; the heat exchanger 40 has a fifth connecting through hole 605; and the front edge of the frame 10 has a sixth connecting through hole 606. The first connecting through hole 601 and the fourth connecting through hole 604, the second connecting through hole 602 and the fifth connecting through hole 605, and the third connecting through hole 603 and the sixth connecting through hole 606 are respectively locked together by fasteners. These fasteners can be screws, bolts, etc.

[0087] Therefore, the assembly of the fume hood 30, frame 10, and heat exchanger 40 with the cover plate 20 can all be performed from the front side of the cover plate 20, achieving frontal assembly without the need for screws from multiple directions, thus simplifying the assembly process. For example, all fasteners of the cover plate 20 can be fastened simultaneously in a short time using specific tooling, enabling automated production, greatly reducing assembly time, and improving production efficiency.

[0088] In some embodiments, such as Figure 1 and Figure 4 As shown, the front panel of the smoke hood 30 may be provided with a fourth connecting through hole 604 so that the cover plate 20 can be locked with the front panel of the smoke hood 30, thus covering the smoke hood 30 while achieving a seal.

[0089] In some embodiments, such as Figure 1 and Figure 5 As shown, the leading edge of the left end plate 41 and the leading edge of the right end plate 42 of the heat exchanger 40 are respectively provided with a fifth connecting through hole 605. For example, the left end plate 41 and the right end plate 42 may each include a front flange 413, which is provided with a fifth connecting through hole 605 and is locked to the cover plate 20 by fasteners, so that the cover plate 20 covers the front flange 413 and achieves a seal, and facilitates the adjustment of the axial direction of the fifth connecting through hole 605.

[0090] In some embodiments, such as Figure 1 and Figure 6As shown, the front edges of the left side plate 12, right side plate 14, and bottom plate 15 of the frame 10 are respectively provided with a sixth connecting through hole 606. For example, the left side plate 12, right side plate 14, and bottom plate 15 each include a folded edge, the folded edge is provided with a sixth connecting through hole 606, and is locked to the cover plate 20 by fasteners, so that the cover plate 20 covers the folded edge and achieves a seal, and facilitates the adjustment of the axial direction of the sixth connecting through hole 606.

[0091] In some embodiments, such as Figure 1 and Figure 7 As shown, the first connecting through hole 601, the second connecting through hole 602, and the third connecting through hole 603 are coplanar. In other words, the first connecting through hole 601, the second connecting through hole 602, and the third connecting through hole 603 are axially aligned, so that fasteners mating with different connecting through holes can be assembled in the same direction, further simplifying the assembly process and facilitating simultaneous and efficient tooling assembly. It should be noted that the number of each connecting through hole can be flexibly set according to actual conditions; there can be one or more, all within the protection scope of this invention, as long as the locking requirements are met.

[0092] In some embodiments of the present invention, such as Figures 1-7 As shown, to improve the stability of the fit between the fume hood 30 and the frame 10, the rear side plate 13 of the frame 10 is provided with a first positioning through hole 701, a second positioning through hole 702, and a third positioning through hole 703. The first positioning through hole 701 can be located at the upper part of the rear side plate 13 of the frame 10, the second positioning through hole 702 can be located at the middle part of the rear side plate 13 of the frame 10, and the third positioning through hole 703 can be located at the lower part of the frame 10. Correspondingly, the fume hood 30 is provided with a fourth positioning through hole 704, the heat exchanger 40 is provided with a fifth positioning through hole 705, and the burner 50 is provided with a sixth positioning through hole 706. The first positioning through hole 701, the fourth positioning through hole 704, the second positioning through hole 702, the fifth positioning through hole 705, the third positioning through hole 703, and the sixth positioning through hole 706 can be locked together by fasteners. The fasteners can be screws, bolts, etc.

[0093] After the fume hood 30, heat exchanger 40, and burner 50 are moved to their installation positions, fasteners can be assembled from either the front or rear side of the frame 10, achieving either front or back assembly without the need for screws from multiple directions, thus simplifying the assembly process. Furthermore, all three components are connected to the rear plate 13 of the frame 10, allowing for simultaneous assembly of corresponding fasteners. For example, using specific tooling, all fasteners on the cover plate 20 can be installed simultaneously in a short time, enabling automated production, significantly reducing assembly time, and improving production efficiency.

[0094] In some embodiments, such as Figure 1 and Figure 6As shown, the rear panel of the fume hood 30 is provided with a fourth positioning through hole 704, so that the axial direction of the fourth positioning through hole 704 extends substantially in the front-rear direction, and the rear panel of the fume hood 30 can be located in front of the rear panel 13 of the frame 10, so that the rear appearance of the hot air equipment is complete and easy to assemble. Figure 1 and Figure 5 As shown, the rear edges of the left end plate 41 and the right end plate 42 of the heat exchanger 40 are respectively provided with fifth positioning through holes 705. Specifically, the rear edges of the left end plate 41 and the right end plate 42 may each include a rear flange 414, and the rear flange 414 is provided with the fifth positioning through hole 705, so that the axial direction of the fifth positioning through hole 705 extends generally in the front-rear direction. Figure 1 and Figure 8 As shown, the burner 50 has a sixth positioning through hole 706 at its rear. For example, the burner 50 may have a downwardly extending flange at its rear, which has the sixth positioning through hole 706, so that the axial direction of the sixth positioning through hole 706 extends substantially in the front-rear direction. When the fume hood 30, heat exchanger 40, and burner 50 are connected to the rear side plate 13 of the frame 10 by fasteners, the axial direction of the positioning through holes on each component is substantially the same, so that fasteners that fit into different positioning through holes can be assembled in the same direction, simplifying the assembly process and improving the sealing performance of the locking connection.

[0095] In some embodiments, such as Figure 1 and Figure 6 As shown, the first positioning through hole 701, the second positioning through hole 702, and the third positioning through hole 703 are coplanar. Fasteners that mate with different positioning through holes not only have the same axial direction, but also have roughly the same start and end positions for assembly, further simplifying the assembly process and making it easier for tooling to assemble simultaneously and efficiently.

[0096] In other embodiments of the invention, such as Figures 17-19 and Figure 22 , Figure 24 As shown, the top surface of the fume hood 30 is provided with an upwardly extending first flange 31, and the cover plate 20 is provided with a first hook 21. The first flange 31 is inserted into the first hook 21 to achieve positioning. Specifically, the first hook 21 can be a U-shaped structure with the opening facing downward, so that the first flange 31 can be inserted into the U-shaped structure through the opening.

[0097] In some embodiments, such as Figures 17-18 and Figures 21-23As shown, the front edge of the frame 10 is provided with multiple positioning flanges 11, and correspondingly, the cover plate 20 is provided with multiple positioning notches 22. The positioning flanges 11 are engaged in the positioning notches 22 to achieve positioning. Specifically, the positioning flanges 11 can extend outward (i.e., the positioning flanges 11 on the left edge extend to the left, and the positioning flanges 11 on the right edge extend to the right) and then backward. The positioning notches 22 are L-shaped notches, and one side of the L-shaped notch has an opening. The positioning flanges 11 move through the opening and insert into the L-shaped notch and then engage in the other side of the L-shaped notch.

[0098] In some embodiments, such as Figure 21 and Figure 22 As shown, the lower side of the cover plate 20 is provided with a third connecting through hole 603, and correspondingly, the front side of the bottom plate 15 of the frame 10 is provided with a sixth connecting through hole 606. The third connecting through hole 603 and the sixth connecting through hole 606 are locked together by screws. Thus, the lower side of the cover plate 20 is securely locked to the frame 10, improving the sealing between the cover plate 20 and the frame 10 and preventing heat and airflow from escaping.

[0099] like Figures 17-24 As shown, when assembling the cover plate 20, the cover plate 20 can be moved backward so that the opening of the first flange 31 is opposite to the opening of the first hook 21, and the positioning flange 11 is located inside one side of the positioning notch 22; then the cover plate 20 is pulled down so that the first flange 31 is inserted into the first hook 21, and at the same time the positioning flange 11 moves to the other side of the positioning notch 22, so that the positioning flange 11 and the positioning notch 22 are engaged, thereby restricting the positioning of the cover plate 20 in the vertical and horizontal directions, and aligning the third connecting through hole 603 and the sixth connecting through hole 606; finally, the third connecting through hole 603 and the sixth connecting through hole 606 are locked with fasteners to achieve a seal between the cover plate 20 and the frame 10.

[0100] In some embodiments of the present invention, the fume hood 30 and the heat exchanger 40 can be connected to form a first assembly. The first assembly can be integrally assembled onto the frame 10 for heat exchange and smoke exhaust, which helps to reduce assembly steps between components and improve overall assembly efficiency. The connection structure between the fume hood 30 and the heat exchanger 40 according to some embodiments of the present invention is described below with reference to the accompanying drawings. The left and right side plates of the fume hood are welded to the left and right end plates of the heat exchanger, respectively; or, the lower edges of the left and right side plates of the fume hood are provided with first connecting portions, and the left and right end plates of the heat exchanger are provided with first connecting mating portions, wherein the first connecting portions and the first connecting mating portions are engaged by hooks and flanges.

[0101] In some embodiments, such as Figure 19As shown, the left and right side plates of the fume hood 30 can be welded to the left end plate 41 and right end plate 42 of the heat exchanger 40, respectively, ensuring reliable connection and good sealing. In other embodiments, such as Figures 1-5 As shown, the lower edges of the left and right side plates of the fume hood 30 are each provided with a first connecting portion 32, and the left end plate 41 and right end plate 42 of the heat exchanger 40 are each provided with a first connecting mating portion 43. The first connecting mating portion 43 and the first connecting portion 32 can be engaged with a flange via a hook. Specifically, the first connecting portion 32 is a second hook, and the first connecting mating portion 43 is a second flange. The second flange can be inserted into the second hook to achieve the connection between the fume hood 30 and the heat exchanger 40. The connection operation is simple, and the fume hood 30 and the heat exchanger 40 can be connected from any direction. Specifically, the second hook can be a U-shaped structure with the opening facing inward (i.e., the second hook on the left side plate opens to the right, and the second hook on the right side plate opens to the left), and the second flange is an outward-extending flange. Of course, the positions of the second flange and the second hook can also be interchanged, which is also within the scope of protection of this invention. Or, as... Figure 4 and Figure 5 As shown, the first connecting part 32 is a third hook, and the first connecting mating part 43 is a first latch. The third hook can be engaged with the first latch to connect the fume hood 30 and the heat exchanger 40. The connection operation is simple, and the fume hood 30 and the heat exchanger 40 can be connected from any direction. Specifically, the third hook can be an L-shaped plate extending downward and then forward (or backward). After passing through the first latch, the L-shaped plate moves forward (or backward) relative to the heat exchanger 40 so that the edge of the first latch engages with the upper side of the horizontal edge of the L-shaped plate. Of course, the positions of the first latch and the third hook can also be interchanged, which is also within the scope of protection of this invention.

[0102] In some specific embodiments, such as Figure 4 and Figure 5 As shown, the side plate of the fume hood 30 may have an outwardly extending folded edge, which is sheared and bent to form a third hook. The upper edge of the end plate of the heat exchanger 40 is provided with an upward flange 411, which is perforated to form a first latch. After the third hook is engaged with the first latch, the edge of the first latch can be located between the horizontal edge of the L-shaped plate and the folded edge of the fume hood 30, so that the folded edge of the fume hood 30 can contact and cooperate with the upward flange 411 of the heat exchanger 40 to achieve vertical positioning and facilitate a reliable seal between the fume hood 30 and the heat exchanger 40.

[0103] The connection structure between the heat exchanger 40 and the frame 10 according to some embodiments of the present invention is described below with reference to the accompanying drawings.

[0104] In some embodiments of the present invention, the frame includes a left side plate, a rear side plate, a right side plate, and a bottom plate. The height of the left side plate and the right side plate is lower than the height of the rear side plate to form a mounting position for the heat exchanger. The upper edge of the left side plate and the upper edge of the right side plate of the frame are provided with a second connecting part. The lower edge of the left end plate and the lower edge of the right end plate of the heat exchanger are provided with a second connecting mating part. The second connecting part and the second connecting mating part are connected by hooks and flanges or by fasteners to assemble the heat exchanger onto the frame.

[0105] like Figures 1-2 and Figures 17-18 As shown, the frame 10 includes a left side plate 12, a rear side plate 13, a right side plate 14, and a bottom plate 15. The height of the left side plate 12 and the right side plate 14 is lower than the height of the rear side plate 13, so that when the cover plate 20 and the smoke hood 30 are installed on the frame 10, a partial opening is formed between the smoke hood 30 and the left side plate 12, and between the smoke hood 30 and the right side plate 14. The left end plate 41 of the heat exchanger 40 is installed between the left side plate 12 and the fume hood 30, and between the rear side plate 13 and the cover plate 20. The right end plate 42 of the heat exchanger 40 is installed between the right side plate 14 and the fume hood 30, and between the rear side plate 13 and the cover plate 20. This allows the heat exchanger 40 to be located within the mounting cavity defined by the frame 10, the fume hood 30, and the cover plate 20. Furthermore, the left end plate 41 and the right end plate 42 of the heat exchanger 40 can close the partial openings of the mounting cavity to facilitate the formation of a sealed space, allowing the heat exchange part of the heat exchanger 40 and components such as the burner 50 to be located within the sealed space.

[0106] In some embodiments, such as Figures 5-6 and Figures 19-21 As shown, the upper edge of the left end plate 41 and the upper edge of the right end plate 42 of the frame 10 are provided with a second connecting part 16, and the lower edge of the left end plate 41 and the lower edge of the right end plate 42 of the heat exchanger 40 are provided with a second connecting mating part 44. The second connecting part 16 is connected to the second connecting mating part 44 to realize the connection between the heat exchanger 40 and the frame 10.

[0107] In some specific embodiments, such as Figures 19-21 As shown, the second connecting part 16 and the second connecting mating part 44 can be engaged by a hook and a flange. Specifically, the second connecting part 16 is a third flange, and the second connecting mating part 44 is a fourth hook, with the third flange engaging with the fourth hook. During assembly, the heat exchanger 40 is fastened to the frame 10 by the engagement of the third flange and the fourth hook. Specifically, the fourth hook can be a U-shaped structure with the opening facing inward, and the third flange can be an outwardly extending flange that engages with the U-shaped structure through the opening to achieve the engagement of the third flange and the fourth hook. Of course, the positions of the third flange and the fourth hook can also be interchanged, which is within the scope of protection of this invention.

[0108] In other specific embodiments, such as Figures 5-6As shown, the second connecting part 16 is a fifth hook, and the second connecting mating part 44 is a second latch. The fifth hook engages with the second latch to connect the frame 10 and the heat exchanger 40. The connection operation is simple, and the frame 10 and the heat exchanger 40 can be connected from any direction. Specifically, the fifth hook can be an L-shaped plate extending upward and then forward (or backward). After passing through the second latch, the L-shaped plate moves forward (or backward) relative to the heat exchanger 40 so that the edge of the second latch engages below the horizontal edge of the L-shaped plate. Of course, the positions of the second latch and the fifth hook can also be interchanged, which is also within the scope of protection of this invention.

[0109] In some specific embodiments, such as Figures 5-6 As shown, the side plate of the frame 10 may have an outwardly extending flange, which is sheared and bent to form a fifth hook. The lower edge of the end plate of the heat exchanger 40 has a downward flange 412, which is perforated to form a second latch. After the fifth hook is engaged with the second latch, the edge of the second latch can be located between the horizontal edge of the L-shaped plate and the flange of the frame 10, so that the flange of the frame 10 can contact and cooperate with the downward flange 412 of the heat exchanger 40 to achieve vertical positioning and facilitate a reliable seal between the frame 10 and the heat exchanger 40.

[0110] In some embodiments of the present invention, such as Figure 1 , Figure 9 and Figure 17 As shown, the gas appliance 100 also includes a gas distribution rod 60, at least a portion of which is fitted into the mounting cavity and located at the bottom, arranged adjacent to the burner 50. The gas distribution rod 60 is used to introduce gas into the burner 50, where air and gas are burned to produce high-temperature flue gas.

[0111] In some embodiments, the gas distributor 60 can be connected to the burner 50 to form a second assembly. This second assembly can be integrally assembled into the mounting cavity, reducing assembly steps between components and improving overall assembly efficiency. Of course, in actual assembly, the burner 50 can be installed in the mounting cavity first, and then the gas distributor 60 can be installed onto the burner 50. Specifically, as shown... Figure 1 , Figures 8-9 and Figure 17 As shown, the burner 50 has a seventh connecting through hole 607 at the front and the gas distribution rod 60 has an eighth connecting through hole 608. The seventh connecting through hole 607 and the eighth connecting through hole 608 are locked together by fasteners to achieve a reliable connection between the burner 50 and the gas distribution rod 60. They can also be assembled from the front side of the frame 10, making assembly more convenient.

[0112] In some specific embodiments, such as Figure 8 and Figure 9As shown, the burner 50 has at least one seventh connecting through hole 607 at each of its two transverse ends, and the gas distribution rod 60 has at least one eighth connecting through hole 608 at each of its two transverse ends. This allows the two components to be connected through the two transverse ends, making the connection more reliable.

[0113] In some embodiments, such as Figure 9 As shown, the gas distributor 60 is fitted with a sealing element 61. After assembly, the sealing element 61 can make sealed contact with the cover plate 20 and the frame 10 to ensure that the gas does not leak and improve the safety of use. The sealing element 61 can be a rubber part, a sponge part, etc.

[0114] In some specific embodiments, the assembly method of the burner 50 and the gas distribution rod 60 is roughly as follows: first, the gas distribution rod 60 is screwed onto the burner 50, and then the second assembly is locked onto the frame 10. The bottom plate 15 of the frame 10 may be provided with a notch 151 to facilitate the passage of the gas distribution rod 60. Figure 9 and Figure 21 As shown, the front edge of the base plate 15 is provided with a notch 151, which facilitates the connection of the gas distribution rod 60 to the external gas pipe.

[0115] In some embodiments of the present invention, such as Figure 1 , Figures 10-11 and Figure 17 As shown, the gas equipment 100 also includes a fan assembly 70, which is mounted on the bottom plate 15 of the frame 10 and located outside the mounting cavity. The fan assembly 70 is used to blow outside air into the frame 10, so that the air can burn with the gas in the burner 50 to produce high-temperature flue gas. That is, the upper part of the frame 10 is provided with a first assembly (including a heat exchanger 40 and a fume hood 30) for heat exchange and flue gas exhaust, and the bottom of the frame 10 is provided with a second assembly (including a burner 50 and a gas distributor 60) for burning air-gas (a mixture of air and gas) and the fan assembly 70 for blowing in air. In this embodiment, the assembly process of the gas equipment 100 can be roughly as follows: first, the first assembly is assembled on the top of the frame 10, then the second assembly is assembled inside the frame 10, then the fan assembly 70 is assembled on the bottom of the frame 10, and finally the cover plate 20 is closed on the front side of the frame 10. Of course, the above is only illustrative and is not a limitation on the assembly process of the gas equipment 100. In addition, the gas equipment 100 also includes the assembly of the outer casing and the connection of other pipes and lines, which will not be described in detail here.

[0116] In some embodiments, the gas equipment further includes a fan assembly, which is mounted on the bottom plate of the frame and located outside the mounting cavity. The bottom plate of the frame is provided with a fan interface, and the air outlet of the fan assembly corresponds to the fan interface. The fan assembly is provided with a first positioning lug, and the bottom surface of the bottom plate extends downward to provide a second positioning lug. The first positioning lug and the second positioning lug are locked together by fasteners.

[0117] In some embodiments, such as Figure 6 and Figure 21 As shown, the base plate 15 of the frame 10 is provided with a fan interface 17, such as... Figures 10-15 and Figures 25-27 As shown, the air outlet 73 of the fan assembly 70 corresponds to the fan interface 17, so that the fan assembly 70 can blow air into the frame 10 and into the mounting cavity through the fan interface 17.

[0118] In addition, such as Figure 6 , Figures 10-13 and Figure 21 As shown, the fan assembly 70 is provided with a first positioning lug 71, and the bottom surface of the base plate 15 extends downward to provide a second positioning lug 18. The first positioning lug 71 and the second positioning lug 18 are locked together by fasteners. When assembling the fan assembly 70, the air outlet 73 of the fan assembly 70 can be connected to the fan interface 17 on the base plate 15 first. At this time, the first positioning lug 71 and the second positioning lug 18 also abut against each other. Then, the first positioning lug 71 and the second positioning lug 18 can be locked together from the front side of the frame 10 by fasteners such as screws to achieve front assembly operation.

[0119] In some embodiments, continue to refer to Figure 6 , Figures 10-13 and Figure 21 As shown, the first positioning lug 71 and the second positioning lug 18 are lugs that can extend in the left-right direction and the up-down direction, and the through holes on the first positioning lug 71 and the second positioning lug 18 for mounting fasteners can extend axially in the front-back direction to make the assembly operation from the front more convenient.

[0120] In some embodiments, continue to refer to Figure 6 , Figures 10-13 and Figure 21 As shown, the top of the fan assembly 70 is provided with a positioning strip 72, and the bottom plate 15 of the frame 10 is provided with a strip-shaped positioning hole 19. The positioning strip 72 is inserted into the strip-shaped positioning hole 19. During assembly, the positioning strip 72 can be inserted into the strip-shaped positioning hole 19 at an angle, and then the positioning strip 72 is supported by the hole wall, thereby further improving the assembly stability of the fan assembly 70 and the frame 10.

[0121] In some specific embodiments, such as Figure 6 and Figure 21 As shown, the base plate 15 may have a downwardly extending flange with a strip-shaped positioning hole 19. The positioning strip 72 is inserted into the positioning hole and then rests on the flange. Alternatively, the base plate 15 may have a strip-shaped positioning hole 19, with the positioning strip 72 inserted into the positioning hole and then resting on the top surface of the base plate 15. Both of these configurations can improve the stability of the assembly.

[0122] In embodiments where both a first positioning lug 71 and a positioning strip 72 are provided, the positioning strip 72 can be inserted into the strip-shaped positioning hole 19 first to achieve pre-positioning, so that the first positioning lug 71 and the second positioning lug 18 abut against each other, such as the first positioning lug 71 being attached to the front (or rear) side of the second positioning lug 18, and the holes on the two positioning lugs being aligned, so that the fasteners can lock the first positioning lug 71 and the second positioning lug 18 together, making the fastener installation faster. The first positioning lug 71 and the positioning strip 72 can be located on opposite sides of the air outlet 73 (such as the left and right sides) to improve the fixing stability of the fan assembly 70.

[0123] like Figures 1-16 As shown, the assembly process of the gas appliance 100 according to the first embodiment of the present invention can be as follows: (1) First, insert the burner 50 into the frame 10 through the front opening of the frame 10 and fix it to the frame 10 with screws. (2) Insert the gas distribution rod 60 into the burner 50 through the front opening of the frame 10 and fix it to the burner 50 with screws. (3) Connect the fume hood 30 and the heat exchanger 40 by snap-fitting through the first connecting part 32 and the first connecting mating part 43. (4) Connect the heat exchanger 40 and the fume hood 30 to the frame 10 by snap-fitting through the second connecting part 16 and the second connecting mating part 44 and fix them with screws. (5) Cover the frame 10, the heat exchanger 40 and the fume hood 30 with the cover plate 20 and fix them from the front with screws. (6) Insert the positioning strip 72 on the right side of the fan assembly 70 into the strip positioning hole 19 on the fan interface 17, and fix the first positioning lug 71 and the second positioning lug 18 from the front with screws to complete the fixing of the fan assembly 70.

[0124] As a result, all screws are concentrated in two planes, and all screws can be driven at the same time in a very short time using specific tooling. Furthermore, all components can be assembled from the front without the need to frequently adjust the orientation of the gas equipment 100, which greatly improves assembly efficiency and facilitates automated production.

[0125] like Figures 17-27As shown, the assembly process of the gas equipment 100 according to the second embodiment of the present invention can be as follows: (1) First, insert the burner 50 into the frame 10 through the front opening of the frame 10 and fix it to the frame 10 with screws. (2) Insert the gas distribution rod 60 into the burner 50 through the front opening of the frame 10 and fix it to the burner 50 with screws. (3) Weld the fume hood 30 to the heat exchanger 40 to form the first assembly. (4) Insert the first assembly into the frame 10 through the front opening of the frame 10 and fix it with 2-4 screws from the front. Connect the left and right end plates of the heat exchanger to the left and right side plates of the frame 10 through the second connecting part 16 and the second connecting mating part 44. (5) First, wrap the first hook 21 on the top of the cover plate 20 around the first flange 31 on the fume hood 30. Then slide the cover plate 20 down until the positioning notches 22 on the left and right sides of the cover plate 20 are engaged with the positioning notches 22 on the frame 10. Finally, the cover plate 20 and the bottom of the frame 10 are fixed with screws to achieve complete constraint. (6) Insert the positioning strip 72 on the right side of the fan assembly 70 into the strip positioning hole 19 on the fan interface 17, and fix the first positioning lug 71 and the second positioning lug 18 from the front with screws to complete the fixing of the fan assembly 70. As a result, the number of screws required can be greatly reduced, and all sides can be assembled from the front without frequent adjustment of the direction of the gas equipment 100, which is conducive to improving assembly efficiency and facilitating automated production.

[0126] In some embodiments of the present invention, such as Figures 6-7 and Figures 21-22As shown, the bottom plate 15 of the frame 10 is provided with a fan interface 17, and at least one side plate of the mounting cavity is provided with cooling and heat insulation plates 80 at intervals, thereby constructing an air-cooling channel 90. For example, at least one of the cover plate 20, the left side plate 12, the right side plate 14, and the rear side plate 13 of the frame 10 is provided with cooling and heat insulation plates 80 at intervals. The air-cooling channel 90 is connected to the fan interface 17 so that part of the air entering the mounting cavity through the fan interface 17 can be mixed with the fuel gas for combustion, and the other part can enter the air-cooling channel 90 to cool the side plates of the mounting cavity. In the embodiment where the side plates of the mounting cavity are provided with cooling and heat insulation plates 80 at intervals, a fully enclosed air-cooling system can be formed to achieve more reliable cooling. By incorporating an air-cooled cooling system, heat exchanger 40 can be a coilless heat exchanger, eliminating the need for water pipes used for cooling in related technologies. This significantly reduces the volume of heat exchanger 40, greatly increasing the space of the combustion zone within the installation cavity without increasing the volume of the gas equipment 100. This reduces the volumetric heat density, avoids the risk of fatigue cracking of the heat exchange tubes or fins of heat exchanger 40, improves the reliability of the gas equipment 100, and eliminates problems such as coil corrosion and freezing. Furthermore, an air-cooled channel 90 is formed between the cooling insulation plate 80 and the side plate of the installation cavity. This large-area air-cooled channel 90 not only reduces the wall temperature but also effectively isolates combustion noise, improving the overall sound quality of the unit. During the design process, the distribution ratio of air blown by the fan assembly 70 for combustion and air cooling can be adjusted by regulating the inlet size of the air-cooled channel 90 to balance the needs of both combustion and air cooling. In some embodiments, 80-90% of the air blown in by the fan unit 70 passes through the burner 50 and participates in the combustion reaction, while the remaining 10-20% is cooled by the air-cooled cooling system consisting of the cooling insulation plate 80, the frame 10, and the cover plate 20 to cool the combustion chamber wall.

[0127] In some embodiments of the present invention, the air-cooling channel is connected to the fan interface, the inlet of at least one air-cooling channel is lower than the combustion surface of the burner, and at least a portion of the airflow flowing out of the outlet is blown toward the bottom of the heat exchanger.

[0128] like Figures 14-15 and Figures 25-27 As shown, the inlet of the air-cooled passage 90 is lower than the combustion surface of the burner 50, thereby ensuring a low air temperature within the air-cooled passage 90. Preferably, at least one air-cooled passage inlet is lower than the bottom surface of the burner 50, meaning the air source within the air-cooled passage 90 is cold air directly introduced by the fan assembly 70. As the cold air flows upward through the air-cooled passage 90, it can cool the frame 10 and the cover plate 20, thereby reducing heat radiation from the frame 10 and the cover plate 20 and minimizing heat damage to the components of the gas equipment 100.

[0129] In some embodiments, such as Figures 14-15 and Figures 25-27 As shown, at least a portion of the airflow exiting the air-cooled channel 90 is directed towards the ends (left and right ends) of the heat exchanger 40 to directly and continuously cool the heat exchanger 40, reducing the heat dissipated by the heat exchanger 40 through the end plate and preventing heat loss to the electronic components of the gas equipment 100. Furthermore, the placement of the inlet and outlet of the air-cooled channel 90 allows it to extend from the lower part to the upper part of the mounting cavity, thus cooling the frame 10 and cover plate 20 over a wider area. For example, at least a portion of the burner 50 is located within the area enclosed by the air-cooled channel 90, and the area between the burner 50 and the heat exchanger 40 is also located within the area enclosed by the air-cooled channel 90, significantly improving the cooling effect.

[0130] In some embodiments, the cooling insulation plate includes a first cooling insulation plate, with the left side plate and / or right side plate of the frame spaced apart to define a first air-cooling channel, the first air-cooling channel having an inlet at the bottom and an outlet at the top; the cooling insulation plate includes a second cooling insulation plate, with the rear side plate of the frame and / or the cover plate spaced apart to define a second air-cooling channel, the second cooling insulation plate having a plurality of outlets spaced apart vertically.

[0131] like Figure 14 , Figures 25-26 As shown, the air-cooled channel 90 includes a first air-cooled channel 91, and the cooling heat insulation plate 80 includes a first cooling heat insulation plate 81. At least one of the left side plate 12 and the right side plate 14 of the frame 10 is provided with the first cooling heat insulation plate 81 at intervals to define the first air-cooled channel 91. In other words, at least one of the left side plate and the right side plate of the mounting cavity has a first air-cooled channel 91. The bottom of the first air-cooled channel 91 has an inlet 911, and the top of the first air-cooled channel 91 has an outlet 912. That is, cold air enters from the bottom and exits from the top. On the one hand, the left side plate 12 and right side plate 14 of the frame 10 are far from the flame of the burner 50 and have a relatively low temperature. The cold air flowing directly in the first air-cooling channel 91 reduces the temperature of the left side plate 12 and right side plate 14 through the principle of convection heat transfer. On the other hand, all the air in the first air-cooling channel 91 can flow out from the top outlet 912 to blow directly to both ends of the heat exchanger 40, thereby forming a low-temperature airflow layer at both ends of the heat exchanger 40, continuously cooling both ends of the heat exchanger 40, reducing the heat dissipated by the left end plate 41 and right end plate 42 of the heat exchanger 40, and preventing the electronic components of the gas equipment 100 from being damaged by heat.

[0132] In some embodiments of the present invention, the first cooling heat insulation plate 81 extends to the lower part of the left side plate 12 and / or right side plate 14 of the frame 10 to the bottom of the burner 50, such that the inlet of the first air-cooling channel 91 is lower than the bottom surface of the burner 50, or the inlet of the first air-cooling channel 91 is flush with the bottom surface of the burner 50. This ensures a lower air temperature within the first air-cooling channel 91. Preferably, the air source within the first air-cooling channel 91 is cold air directly introduced by the fan assembly 70. As the cold air flows upward through the first air-cooling channel 91, it also cools the frame 10, thereby reducing the heat radiation from the frame 10 to the outside and reducing heat damage to the components of the gas equipment 100.

[0133] In some embodiments, the second cooling insulation plate has multiple intercepting sections, each having a lateral extension section and a longitudinal extension section. The lateral extension section extends from the inside out, and the starting end of the longitudinal extension section is connected to the outer end of the lateral extension section. The longitudinal extension section extends upward at an angle, and each intercepting section has an outlet for the second air-cooling channel. Preferably, the outlet of the second air-cooling channel is formed as a strip-shaped air outlet on the intercepting section. The height of the first layer of intercepting section on the lowest side of the second cooling insulation plate near the back of the frame is lower than the height of the first layer of intercepting section on the front side of the second cooling insulation plate, so that the height of the first layer of air outlet of the air-cooling channel near the back frame is relatively low. Furthermore, the air outlet of the second layer of the front second cooling heat insulation plate is higher than the air outlet of the second layer of the rear second cooling heat insulation plate, and the air outlet of the third layer of the front second cooling heat insulation plate is higher than the air outlet of the third layer of the rear second cooling heat insulation plate. The interval between each layer of the rear second cooling heat insulation plate is larger than the interval between each layer of the front second cooling heat insulation plate, or the interval between at least one layer of the rear second cooling heat insulation plate is larger than the interval between the front second cooling heat insulation plates, so that the air outlets of the front and rear second cooling heat insulation plates are staggered to avoid direct collision of airflow in the cavity, which would generate noise, and also to better cool the combustion chamber cavity.

[0134] like Figures 6-7 , Figures 14-16 and Figures 21-22 , Figures 25-27As shown, the air-cooled passage 90 includes a second air-cooled passage 92, and the cooling heat insulation plate 80 includes a second cooling heat insulation plate 82. At least one of the rear side plate 13 and the cover plate 20 of the frame 10 is provided with the second cooling heat insulation plate 82 at intervals to define the second air-cooled passage 92. In other words, at least one of the rear side plate 13 and the cover plate 20 of the mounting cavity is provided with the second air-cooled passage 92 to cool down from at least one side of the front and rear sides of the combustion chamber. The bottom of the second air-cooled passage 92 has an inlet 921, and the second cooling heat insulation plate 82 may have a plurality of outlets 922 distributed vertically at intervals, so that air in the second air-cooled passage 92 can flow from the outlets 922 at different heights to the inner side of the second cooling heat insulation plate 82. At least part of the cold air can form an air film protective layer on the inner side of the second cooling heat insulation plate 82, which isolates the high-temperature flue gas and prevents the temperature from being conducted to the outside, thereby reducing the wall temperature.

[0135] In some embodiments, the second cooling insulation plate is provided with three layers of interception sections, wherein the bottom interception section is provided with five strip-shaped air outlets, the middle interception section is provided with four strip-shaped air outlets, and the top interception section is provided with five strip-shaped air outlets; that is, the number of air outlets in the middle interception section can be less than the number of air outlets in the top and bottom interception sections, so as to reduce the resistance of the air outlets in the middle interception section and better achieve the effect of cooling the combustion chamber cavity.

[0136] For example, such as Figures 6-7 , Figures 14-16 and Figures 21-22 , Figures 25-27 As shown, the second cooling heat insulation plate 82 extends towards the bottom of the rear side plate 13 of the frame 11, and the gap between the second cooling heat insulation plate 82 and the rear side plate 13 of the frame 11 forms the rear air inlet of the second cooling channel 92, which is located near the bottom side plate of the burner 50. This allows the second cooling channel 92 to guide the lower-temperature air from the lower part of the combustion chamber upwards, thereby achieving a better cooling effect on the rear side plate 13 of the frame 11 and better preventing damage to the electronic components of the gas equipment 100.

[0137] For example, such as Figures 6-7 , Figures 14-16 and Figures 21-22 , Figures 25-27As shown, the second cooling heat insulation plate 82 extends downwards towards the cover plate 20, and the gap between the second cooling heat insulation plate 11 and the cover plate 20 forms the front air inlet of the second air-cooling channel 92. The front air inlet of the second air-cooling channel 92 is higher than the rear air inlet. This is to ensure that the downward-extending end of the second cooling heat insulation plate 82 that mates with the cover plate 20 is smaller than the downward-extending end of the second cooling heat insulation plate 82 that mates with the rear side plate 13 of the frame 11. This avoids interference between the front-side second cooling heat insulation plate 82 and the installation of other structures such as the air distribution rod 32, while ensuring a low air inlet temperature.

[0138] In some specific embodiments, such as Figures 6-7 , Figures 14-16 and Figures 21-22 , Figures 25-27 As shown, the second cooling insulation plate 82 has multiple intercepting sections 821. Each intercepting section 821 has a transverse extension section 822 and a longitudinal extension section 823. The transverse extension section 822 extends from the inside to the outside, and the starting end of the longitudinal extension section 823 is connected to the outer end (i.e., the tail end) of the transverse extension section 822. The longitudinal extension section 823 extends upward at an angle. Each intercepting section 821 has an outlet 922 of the second air-cooling channel 92. That is, the second air-cooling channel 92 diverts the flow through multiple intercepting sections 821 and diverts the flow out at the outlet 922 of each intercepting section 821, dispersing it in the inner wall area of ​​the second cooling insulation plate 82. This results in a better-distributed air film protective layer always forming on the inner wall surface of the second cooling insulation plate 82, blocking heat radiation to the outside and reducing the impact of heat on the components of the gas equipment 100.

[0139] In some embodiments of the present invention, such as Figures 15-16 and Figure 27 As shown, each lateral extension segment 822 has an outlet 922 of the second air-cooling channel 92 with an upward opening direction, so that the air flowing out of the outlet 922 of the second air-cooling channel 92 tends to flow upward, which is conducive to the formation of an air film protective layer on the inner wall surface of the second cooling insulation plate 82 at all times, reducing heat radiation to the outside. It should be noted that the lateral extension segment 822 can extend horizontally or inclined to the horizontal direction, and the opening direction of the outlet 922 of the second air-cooling channel 92 can be vertically upward or inclined upward, all of which are within the protection scope of the present invention.

[0140] In addition, refer to Figure 16 As shown, the longitudinal extension section 823 extends upward and inward at an incline, so that the air flowing out of the outlet 922 on the transverse extension section 822 can be directly blown toward the inclined longitudinal extension section 823, thereby forming an air film protective layer under the guiding effect of the longitudinal extension section 823, so as to improve the heat insulation effect.

[0141] In some embodiments of the present invention, such as Figures 14-15 and Figure 27 As shown, a portion of the multiple second cold air channels wraps around the outer periphery of the heat exchanger 40 to isolate the heat exchanger 40 from the outside to a certain extent, reduce the heat radiated from the area where the heat exchanger 40 is located, and prevent the electronic components of the gas equipment 100 from being subjected to heat loss.

[0142] In some specific embodiments, such as Figure 27 As shown, the airflow path in the second cold air channel is higher than the bottom surface of the heat exchanger 40.

[0143] In some embodiments of the present invention, such as Figures 14-16 As shown, among the multiple intercepting sections 821, the connection between the lateral extension 822 and the longitudinal extension 823 of the uppermost intercepting section 821 contacts and engages with the rear side plate 13 (or cover plate 20) of the corresponding frame 10 to form an air insulation layer on the upper side of the second cooling insulation plate (the part corresponding to the heat exchanger side wall); the connection between the lateral extension 822 and the longitudinal extension 823 of the other intercepting sections 821 is spaced apart from the rear side plate 13 (or cover plate 20) of the corresponding frame 10 to form a cooling channel in the gap between the second cooling insulation plate and the frame back plate or cover plate.

[0144] Taking the three intercepting sections 821 located inside the rear panel 13 of the frame 10 as an example, after the cold air enters from the inlet 921 of the second air-cooling channel 92, it flows upward through the second air-cooling channel 92; after reaching the outlet 922 of the lowest intercepting section 821, part of the cold air blows onto the longitudinal extension section 823 of the intercepting section 821 to form an air film protective layer, which isolates the high-temperature flue gas and prevents the temperature from radiating to the outside; the remaining cold air continues to flow upward and reaches the middle intercepting section. After exiting 922 of 821, some of the cold air is blown to the longitudinal extension 823 of the intercepting section 821 to form a protective air film. The remaining cold air continues to flow upward and reaches the exit 922 of the uppermost intercepting section 821. Since the intercepting section 821 is close to the rear side plate 13 of the frame 10, it plays a role in interception. The cold air enters the combustion chamber from the uppermost exit 922. All the cold air flows out and is blown to the longitudinal extension 823 of the intercepting section 821 to form a protective air film.

[0145] The flow paths and cooling methods of the other intercepting sections 821 and the second air-cooling channel 92 located inside the cover plate 20 are similar to those in the above embodiment, and will not be described again here. Through the throttling effect of the uppermost intercepting section 821, all the cold air in the second air-cooling channel 92 can be blown out, avoiding accumulation in the upper part of the second air-cooling channel 92 and affecting the heat insulation effect.

[0146] In some embodiments, such as Figures 15-16As shown, the outlet 922 of the uppermost intercepting section 821 can be lower than the heat exchanger 40, and the upper end of the longitudinal extension section 823 of the intercepting section 821 is not lower than the lower end of the heat exchanger 40. Therefore, the cold air blown out from the outlet 922 of the intercepting section 821, after forming an air film protective layer in the longitudinal extension section 823, can also flow upwards to the end of the heat exchanger 40 under the guidance of the longitudinal extension section 823, thereby cooling the end of the heat exchanger 40 and preventing heat from radiating outwards from the left end plate 41 and right end plate 42 of the heat exchanger 40, further improving the heat insulation effect.

[0147] In some embodiments of the present invention, such as Figure 15 and Figure 27 As shown, the second cooling heat insulation plate 82 extends towards the top of the rear side plate 13 and / or the cover plate 20 of the frame 11, to the top of the heat exchanger 40, to form heat insulation portions 93 on the front and rear sides of the heat exchanger 40. In embodiments including multiple flow-blocking sections 821, as Figure 15 and Figure 27 As shown, a heat insulation section 93 can also be constructed between the second cooling heat insulation plate 82 and at least one of the cover plate 20 and the rear side plate 13 of the frame 11. The heat insulation section 93 is located on the upper side of the second air-cooling channel 52 and is connected to the longitudinal extension section 823 of the uppermost intercepting section 821 to simplify the structure and make full use of space. Furthermore, the heat insulation section 93 is located on the outer periphery of the heat exchanger 40. The heat insulation section 93 isolates the heat exchanger 40 from the outside, reducing the amount of heat radiated from the area where the heat exchanger 40 is located, and preventing heat loss from the electronic components of the gas equipment 100.

[0148] In some embodiments, such as Figure 15 and Figure 27 As shown, the heat insulation part 93 is an air heat insulation layer. The air heat insulation layer can be defined by the upper part of the second cooling heat insulation plate 82 cooperating with the corresponding cover plate 20 (or rear side plate 13), which simplifies the device structure. Specifically, the lower end of the air heat insulation layer can be the contact point between the connection between the transverse extension 822 and the longitudinal extension 823 of the uppermost intercepting section 821 and the corresponding cover plate 20 (or rear side plate 13) of the frame 11.

[0149] In addition, the air insulation layer is not connected to the second air cooling channel 52 to prevent the airflow in the second air cooling channel 52 from entering the air insulation layer and affecting the formation of the air film layer on the inner side of the second cooling insulation plate 82.

[0150] In some embodiments of the present invention, such as Figure 6 and Figure 21 As shown, the left side panel 12 of the frame 10 is provided with a left support flange (such as...). Figure 6 Used to set the flange of the second connecting part 16, or as Figure 21The second connecting part 16 shown has a left support flange for supporting the left end plate 41 of the heat exchanger 40. The outlet 912 of the first air-cooling channel 91 corresponding to the left side plate 12 of the frame 10 can be flush with the height of the left support flange so that the airflow from the first air-cooling channel 91 can blow more directly onto the left end plate 41 of the heat exchanger 40, resulting in a better cooling effect on the left end plate 41.

[0151] In some embodiments of the present invention, such as Figure 6 and Figure 21 As shown, the right side plate 14 of the frame 10 is provided with a right support flange, which is used to support the right end plate 42 of the heat exchanger 40. The outlet 912 of the first air-cooling channel 91 corresponding to the right side plate 14 of the frame 10 can be flush with the height of the right support flange, so that the airflow from the first air-cooling channel 91 can blow more directly onto the right end plate 42 of the heat exchanger 40, resulting in a better cooling effect on the right end plate 42.

[0152] In some specific embodiments of the present invention, such as Figure 14 As shown, the mounting cavity includes a first chamber and a second chamber. The first chamber is located between the bottom side plate 51 of the burner 50 and the bottom plate 15 of the frame 10, and the second chamber is located between the burner 50 and the heat exchanger 40, so that both the first and second chambers are located between two first cooling and heat insulation plates 81 that cooperate with the left side plate 12 and the right side plate 14 of the frame 10. Furthermore, the air outlet of the fan assembly 70 communicates with the middle of the first chamber. The air outlet of the fan assembly 70, the first chamber, the burner 50, the second chamber, and the heat exchanger 40 are arranged sequentially from bottom to top.

[0153] The corresponding first air-cooling channel 91 extends from bottom to top, so that the inlet 911 of the first air-cooling channel 91 is connected to the first chamber directly, and the outlet 912 of the first air-cooling channel 91 is connected to the top of the second chamber. Part of the airflow entering the first chamber can flow upward through the first air-cooling channel 91 and flow to the top of the second chamber. On the one hand, the gas in the first chamber is cold air that flows directly in from the air outlet of the fan assembly 70. The first air-cooling channel 91 is directly connected to the first chamber, so that the air source in the first air-cooling channel 91 is the cold air directly introduced by the fan assembly 70. As the cold air flows upward in the first air-cooling channel 91, it can cool down the temperature of the frame 10, thereby reducing the heat radiation of the frame 10 to the outside and reducing the damage of heat to the components of the gas equipment 100. On the other hand, the outlet 912 of the first air-cooling channel 91 extends directly to the top of the second chamber, making the first air-cooling channel cover a wider range in the longitudinal direction of the frame 10, thus reducing the effect of heat radiation. Furthermore, the distance between the outlet 912 of the first air-cooling channel 91 and the end of the heat exchanger 40 is smaller, allowing the airflow blown out from the outlet 912 of the first air-cooling channel 91 to blow more and more fully onto the bottom of the left end plate 41 and the right end plate 42 of the heat exchanger 40. This improves the effect of preventing the heat of the high-temperature flue gas from approaching the areas of the left end plate 41 and the right end plate 42, further reducing the thermal fatigue of the heat exchange tubes of the heat exchanger 40, and better preventing cracks in the welds between the heat exchange tubes and the left end plate 41 and the right end plate 42, as well as preventing water leakage from the heat exchange tubes.

[0154] In some embodiments of the present invention, such as Figure 14 and Figure 15 As shown, the mounting cavity includes a first chamber and a second chamber. The first chamber is located between the bottom side plate 51 of the burner 50 and the bottom plate 15 of the frame 10, and the second chamber is located between the burner 50 and the heat exchanger 40, such that both the first and second chambers are located between two second cooling and heat insulation plates 82 that cooperate with the cover plate 20 and the rear side plate 13 of the frame 10. Furthermore, the air outlet of the fan assembly 70 communicates with the middle of the first chamber. The air outlet of the fan assembly 70, the first chamber, the burner 50, the second chamber, and the heat exchanger 40 are arranged sequentially from bottom to top.

[0155] The corresponding second air-cooling channels 92 extend from bottom to top. The front air inlet of the second air-cooling channel 92 corresponding to the cover plate 20 is located in the middle of the burner 50, and the back air inlet of the second air-cooling 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, so that the inlets 921 of both second air-cooling channels 92 are connected to the first chamber. The outlet 922 of the second air-cooling channel 92 is located in the middle of the second cooling insulation plate 82 rather than at the top, so that the outflowing airflow can continue to flow upward, which is conducive to the formation of an air film layer on the inner side of the second cooling insulation plate 82. In some embodiments, the outlet 922 of the second air-cooling channel 92 is connected to different areas of the second chamber in multiple places in the longitudinal direction. Part of the airflow entering the first chamber can flow upward through the second air-cooling channel 92 and flow to multiple places in the second chamber in the longitudinal direction. On the one hand, the gas in the first chamber is cold air that flows directly in from the air outlet of the fan assembly 70. The second air-cooling channel 92 is connected to the first chamber, so that the air source in the second air-cooling channel 92 is the cold air directly introduced by the fan assembly 70. As the cold air flows upward in the second air-cooling channel 92, it can cool down the temperature of the frame 10, thereby reducing the heat radiation of the frame 10 to the outside and reducing the damage of heat to the components of the gas equipment 100. 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 closer to the burner 50. Therefore, the temperature of the cover plate 20 and the rear side plate 13 of the frame 10 is relatively high. By setting outlets of the second air-cooling channel 92 at different heights corresponding to the second cooling insulation plate 82 on the cover plate 20 and the rear side plate 13 of the frame 10, cold air can be blown out from different heights to ensure that an air film layer is formed on the entire inner surface of the second cooling insulation plate 82. This more comprehensively and effectively blocks heat radiation from the second cooling insulation plate 82 and the frame 10, thereby reducing the impact of heat on the components of the gas equipment 100. In some embodiments of the present invention, the burner has a bottom side plate. The left and right sides of the bottom side plate of the burner form downwardly extending flanges that cooperate with and contact the first cooling insulation plates spaced apart on the left and right sides of the frame. The first cooling insulation plates extend towards the bottom of the frame so that the air inlet of the first air-cooling channel is located at the lower part of the bottom side plate of the burner. The corresponding first air-cooling channel 91 extends from bottom to top, so that the inlet 911 of the first air-cooling channel 91 communicates directly with the first chamber.

[0156] like Figure 15 and Figure 27As shown, the burner 50 has a bottom side plate 51, and a downwardly extending burner flange 52 is provided at the rear end of the bottom side plate 51. The burner flange 52 fits against 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 with fasteners, which is beneficial for front or back assembly of the burner 50 and improves assembly efficiency. The lower end of the second cooling heat insulation plate 82 is clearance-fitted with the bottom side plate 51. For example, the lower end of the second cooling heat insulation plate 82 is sealed to the bottom side plate 51 or separated by a small gap. The bottom side plate 51 is provided with a through hole, which connects to the inlet 921 of the second air-cooling channel 92.

[0157] Thus, the second cooling insulation plate 82 and the rear side plate 13 of the frame 10 define the second air-cooling channel 92, and the through hole on the bottom side plate 51 is connected to the second air-cooling channel 92 to avoid the air intake structure of the second air-cooling channel 92 from interfering with the fixed structure of the burner 50, making the structural design more reasonable.

[0158] In some embodiments of the present invention, such as Figure 6 and Figure 21 As shown, the left side panel 12, right side panel 14, and rear side panel 13 of the frame 10 can be integrally formed into a frame body. The bottom plate 15 of the frame 10 is connected to the bottom of the frame body, for example, by riveting, welding, or fastener connection. Both the frame body and the bottom plate 15 of the frame 10 are connected to the cover plate 20 to form a complete shell structure. The structure is simple and does not require screw fixing from multiple directions, reducing assembly steps. Furthermore, the integral frame body helps to improve the sealing performance of the first air-cooling channel 91 and the second air-cooling channel 92. For example, in the embodiment including the first air-cooling channel 91 and the second air-cooling channel 92, the integrally formed frame body makes it seamless between the left side panel 12, right side panel 14, and rear side panel 13 of the frame 10, and makes it easier to seal between the frame body and the first cooling heat insulation plate 81 and the second cooling heat insulation plate 82.

[0159] In some specific embodiments, such as Figure 6 and Figure 27As shown, the left side panel 12 and right side panel 14 of the frame 10 are respectively provided with first cooling heat insulation plates 81 at intervals, thereby forming a first air-cooling channel 91; the rear side panel 13 of the frame 10 is provided with second cooling heat insulation plates 82 at intervals, thereby forming a second air-cooling channel 92. Furthermore, the first cooling heat insulation plates 81 and 82 are integrally formed to create a U-shaped structure that is substantially the same as the shape of the frame body. The two integral parts cooperate with each other to define two first air-cooling channels 91 and one second air-cooling channel 92, greatly improving the sealing performance of the air-cooling channels. Moreover, during assembly, the left side panel 12, right side panel 14, and rear side panel 13 of the frame 10 do not require assembly, nor do the first cooling heat insulation plates 81 and 82 require assembly. When the integral cooling heat insulation plates are connected to the frame body, the operation can be performed from the front of the frame body, thus greatly simplifying the assembly process.

[0160] In some specific embodiments, such as Figure 6 As shown, the front edge of the left side plate 12 of the frame 10 is provided with a frame flange 101 extending to the left or right, and the front edge of the right side plate 14 of the frame 10 is also provided with a frame flange 101 extending to the left or right. The bottom plate 15 of the frame 10 is provided with a bottom plate flange 102 extending upward or downward. This ensures that the frame flange 101 and the bottom plate flange 102 are generally located in a longitudinal plane along the left-right direction. The cover plate 20 can be connected to the frame flange 101 and the bottom plate flange 102 by fasteners, such as screws or bolts. Therefore, the assembly of the left side plate 12, right side plate 14, and bottom plate 15 of the frame 10 with the cover plate 20 can all be performed from the front of the frame 10, achieving frontal assembly without the need for screws from multiple directions, simplifying the assembly process. For example, all fasteners for the cover plate 20 can be installed simultaneously in a short time using specific tooling, achieving automated production, greatly reducing assembly time, and improving production efficiency.

[0161] In some embodiments of the present invention, such as Figure 6 As shown, the top edge of the rear panel 13 of the frame 10 is a flat plate extending longitudinally, and the fume hood 30 is connected to the flat plate, for example, by fasteners. In other words, the part of the rear panel 13 of the frame 10 that is connected to the fume hood 30 is not a laterally bent flange structure, but is connected to the fume hood 30 by a flat plate, so that it can be installed from the front or back of the frame 10 during assembly, thereby simplifying the assembly process.

[0162] A gas water heater according to an embodiment of the present invention includes a gas appliance 100 according to an embodiment of the present invention. Since the gas appliance 100 according to an embodiment of the present invention has the aforementioned beneficial technical effects, the gas water heater according to an embodiment of the present invention defines an installation cavity by a frame 10, a fume hood 30, and a cover plate 20. The heat exchange components of the burner 50 and the heat exchanger 40 are installed within the installation cavity, allowing multiple components to be integrated, simplifying the assembly and sealing structures, which is beneficial for improving production efficiency, achieving automated production, and reducing heat loss and exhaust gas leakage during operation of the gas appliance 100, thus reducing energy consumption and improving safety. Furthermore, the structure of each component of the gas appliance 100 is suitable for front mounting and modularization, improving assembly efficiency.

[0163] In some embodiments, a gas water heater includes a gas-fired boiler or a gas-fired wall-hung boiler.

[0164] Other configurations and operations of the gas appliance 100 according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here. Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A gas appliance, characterized in that It comprises: a frame, a cover plate, a smoke hood and a heat exchanger, the cover plate is arranged on the frame by a front cover, the heat exchanger is arranged on the frame, the smoke hood is arranged on the top of the frame, and the frame, the cover plate, the end plate of the heat exchanger and the smoke hood cooperate to define a mounting cavity; a fan unit, which is assembled on the bottom plate of the frame and located outside the mounting cavity; a burner, which is assembled in the mounting cavity; The bottom plate of the frame is provided with a fan interface, and at least one side plate of the mounting cavity is provided with a cooling and heat insulation plate, thereby forming a wind cooling channel, the wind cooling channel is communicated with the fan interface, the inlet of the at least one wind cooling channel is lower than the combustion surface of the burner, and at least a part of the outlet airflow blows to the bottom of the heat exchanger; The cooling and heat insulation plate comprises a first cooling and heat insulation plate, the left side plate and / or the right side plate of the frame is provided with the first cooling and heat insulation plate to define a first wind cooling channel, the bottom of the first wind cooling channel has an inlet and the top has an outlet; the cooling and heat insulation plate comprises a second cooling and heat insulation plate, the rear side plate of the frame and / or the cover plate is provided with the second cooling and heat insulation plate to define a second wind cooling channel, the second cooling and heat insulation plate is provided with a plurality of vertically spaced outlets; The second cooling and heat insulation plate has a plurality of flow blocking sections, the flow blocking section has a transverse extension and a longitudinal extension, the transverse extension extends from inside to outside, the starting end of the longitudinal extension is connected with the outer end of the transverse extension, and the longitudinal extension is inclined to extend upward, each flow blocking section has an outlet of the second wind cooling channel; The connection between the transverse extension and the longitudinal extension of the uppermost flow blocking section of the second cooling and heat insulation plate is in contact with the rear side plate of the frame and / or the cover plate, and the connections between the transverse extensions and the longitudinal extensions of the other flow blocking sections are spaced apart from the rear side plate of the frame and / or the cover plate; A part of the plurality of second wind cooling channels is wrapped around the outer periphery of the heat exchanger.

2. Gas appliance according to claim 1, characterized in that The frame comprises a left side plate, a rear side plate, a right side plate and a bottom plate, the front part of the smoke hood is formed with a top mounting surface matched with the upper end of the cover plate, and the upper end of the cover plate is matched and connected with the top mounting surface.

3. Gas appliance according to claim 1, characterized in that The left and right side plates of the frame are bent to form a first side mounting surface matched with the cover plate, the heat exchanger is arranged on the upper end of the left and right side plates of the frame, and a second side mounting surface matched with the cover plate is formed on the left and right end plates of the heat exchanger, and the left and right edges of the cover plate are matched and connected with the first and second side mounting surfaces.

4. Gas appliance according to claim 1, characterized in that The bottom plate of the frame is provided with a bottom plate turn-up extending upward or downward, the bottom plate turn-up forms a bottom mounting surface, and the bottom of the cover plate is matched and connected with the bottom mounting surface.

5. Gas appliance according to any of claims 1-4, characterized in that The top mounting surface, the first side mounting surface, the second side mounting surface and the bottom mounting surface are provided with connecting through holes between the cover plate, so as to be connected by fasteners. And / or, the top mounting surface, the first side mounting surface, the second side mounting surface and the bottom mounting surface are provided with hooks or slots between the cover plate, so as to be connected through the hook and slot structure.

6. Gas appliance according to claim 1, characterized in that The rear part of the smoke hood is formed with a rear mounting surface matched with the top of the rear side plate of the frame body, and a connecting through hole is arranged between the rear mounting surface and the rear side plate, so as to be connected through a fastener.

7. The gas appliance of claim 1, wherein, The burner has a bottom side plate, and the rear end of the bottom side plate is provided with a downwardly extending lower flange, and the lower flange is matched with the rear side plate of the frame body to form a burner mounting surface matched with the rear side plate of the frame body.

8. Gas appliance according to claim 5, characterized in that One or more reinforcing structures are arranged on the cover plate close to the connecting through hole.

9. The gas appliance of claim 1, wherein, The left side plate and the right side plate of the smoke hood are respectively welded with the left end plate and the right end plate of the heat exchanger; or, the lower edges of the left side plate and the right side plate of the smoke hood are respectively provided with a first connecting part, and the left end plate and the right end plate of the heat exchanger are respectively provided with a first connecting matching part, wherein the first connecting part and the first connecting matching part are connected through a hook and a flange.

10. Gas appliance according to claim 1, characterized in that The frame body includes a left side plate, a rear side plate, a right side plate and a bottom plate, the heights of the left side plate and the right side plate are lower than the height of the rear side plate, the upper edges of the left side plate and the right side plate of the frame body are respectively provided with a second connecting part, the lower edges of the left end plate and the right end plate of the heat exchanger are respectively provided with a second connecting matching part, and the second connecting part and the second connecting matching part are connected through a hook and a flange or through a fastener.

11. Gas appliance according to claim 1, characterized in that A fan interface is arranged on the bottom plate of the frame body, and an air outlet of the fan assembly corresponds to the fan interface, A first positioning lug is arranged on the fan assembly, a second positioning lug is arranged on the bottom surface of the bottom plate and extends downwardly, and the first positioning lug and the second positioning lug are locked through a fastener.

12. Gas appliance according to claim 1, characterized in that The second cooling and heat insulation plate extends to the side of the heat exchanger from the rear side plate of the frame body and / or the top of the cover plate, so as to form a heat insulation part on the front and rear sides of the heat exchanger.

13. The gas device according to claim 1, wherein, The left side plate and / or the right side plate of the frame body are provided with a support flange supporting the left end plate and / or the right end plate of the heat exchanger, and the outlet of the first air cooling channel is close to the support flange and is flush with the support flange in height.

14. The gas appliance of claim 1, wherein, The mounting cavity includes a first cavity between the bottom side plate of the burner and the bottom plate of the frame body and a second cavity between the burner and the heat exchanger, the gas device includes a fan assembly, an air outlet of the fan assembly communicates with the first cavity, part of the airflow entering the first cavity flows upwardly to the top of the second cavity through the first air cooling channel, and part of the airflow entering the first cavity flows upwardly to multiple positions along the longitudinal direction of the second cavity through the second air cooling channel.

15. The gas appliance of claim 1, wherein, The left side and the right side of the bottom side plate of the burner form downwardly extending flanges matched with and in contact with the first cooling and heat insulation plates arranged at intervals on the left side and the right side of the frame body, and the air inlet of the first air cooling channel is arranged on the lower part of the bottom side plate of the burner.

16. The gas appliance of claim 1, wherein, The lower end of the second cooling and heat insulation plate is in gap fit with the rear part of the burner bottom side plate, the bottom side plate is provided with a through hole, the through hole is in communication with the inlet of the second air cooling channel.

17. The gas appliance of claim 1, wherein, The left side plate, the right side plate and the rear side plate of the frame body are integrally formed as a frame body, the bottom plate of the frame body is connected with the bottom of the frame body, and the cover plate is connected with the frame body and the bottom plate of the frame body.

18. The gas appliance of claim 1, wherein, The left side plate and the right side plate of the frame body are respectively provided with the first cooling and heat insulation plate to form the first air cooling channel, and the rear side plate of the frame body is provided with the second cooling and heat insulation plate to form the second air cooling channel, and the first cooling and heat insulation plate and the second cooling and heat insulation plate are integrally formed.

19. A gas water heater, characterized by, A gas device comprising any one of claims 1-18.

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