Air cooling box body for gas water heater and gas water heater

Abstract

The utility model relates to an air cooling box body for a gas water heater and the gas water heater. The air cooling box body comprises an inner shell, an outer shell, an air cooling cavity formed between the inner shell and the outer shell, and a partition piece arranged in the air cooling cavity. According to the air-cooled box body disclosed by the utility model, the air-cooled chamber is conveniently separated by placing the separator in the air-cooled chamber, and the air outlet group is arranged at the position, opposite to the separator, of the inner shell, and at least one air inlet group is arranged at the position, opposite to the separator, of the outer shell, so that the air-cooled chamber is conveniently separated. And the separator and the inner shell or the outer shell are integrally formed, so that a double-layer air flow channel can be realized on the premise of not increasing the number of parts, the procedures of assembling the whole machine are reduced, the whole machine is convenient to install, and the difficulty and the cost of a part production process are reduced.

Description

Technical Field

[0001] The utility model relates to a gas water heater, in particular to an air-cooled box body used for a gas water heater and the gas water heater. Background Art

[0002] Most traditional gas water heaters use water cooling with copper heat exchangers to cool the combustion chamber shell. However, the cost of copper heat exchangers is relatively high and they are easily affected by water quality, which affects the service life and reliability of gas water heaters.

[0003] In order to solve the above problems, the prior art has gradually derived a technical solution of using air cooling to cool the combustion chamber shell. However, the cooling effect of the air cooling method of setting a single-layer air flow channel in the combustion chamber shell is not ideal. Although the air cooling solution of setting a double-layer air flow channel in the combustion chamber shell as a whole has a better cooling effect, it is necessary to remove and set an additional splitter plate between the inner and outer shells of the combustion chamber shell to separate the entire air flow channel, and fix the splitter plate between the inner and outer shells. The overall structure is relatively complex and the production cost is high. Utility Model Content

[0004] The first technical problem solved by the utility model is to provide an air-cooling box for a gas water heater, which effectively solves the problems of complex structure and high production cost of the air-cooling box of the existing gas water heater.

[0005] The second technical problem solved by the utility model is to provide a gas water heater. The technical effect brought by the air-cooled box for the gas water heater is the same as the technical effect of the air-cooled box for the gas water heater, so it will not be repeated.

[0006] The first technical problem mentioned above is solved by the following technical solution:

[0007] A wind-cooled box for a gas water heater, the wind-cooled box is a frame structure with openings at both ends connected to each other, the wind-cooled box comprises an inner shell, an outer shell, a wind-cooled chamber formed between the inner shell and the outer shell, and a partition arranged in the wind-cooled chamber, an air outlet group for air to flow out of the wind-cooled chamber is provided at a position where the inner shell is opposite to the partition, the outer shell is provided with an air inlet group for air to enter the wind-cooled chamber, and at least one group of the air inlet groups is provided at a position where the outer shell is opposite to the partition, the partition and the inner shell are an integrally formed structure; or the partition and the outer shell are an integrally formed structure.

[0008] Compared with the background technology, the air-cooling box for a gas water heater described in the utility model has the following beneficial effects: by placing a partition in the air-cooling chamber, the air-cooling chamber can be separated; by providing an air outlet group at a position where the inner shell and the partition are opposite to each other, and by providing at least one group of air inlet groups at a position where the outer shell and the partition are opposite to each other, and by integrally forming the partition with the inner shell or the outer shell, a double-layer air flow channel can be achieved without increasing the number of parts, thereby reducing the assembly process of the whole machine, facilitating the installation of the whole machine, and reducing the difficulty and cost of the parts production process.

[0009] In one embodiment, a first air flow channel is formed between the partition and the outer shell, a second air flow channel is formed between the partition and the inner shell, and the first air flow channel and the second air flow channel are communicated with each other.

[0010] The air-cooled box for a gas water heater described in the utility model has the following beneficial effects: a partition is used to form a first air flow channel and a second air flow channel, the first air flow channel and the second air flow channel are connected in an air-cooled chamber, the air flow in the first air flow channel can flow into the second air flow channel, and a double-layer air flow channel is formed in a local part of the partition in the cold air box, thereby achieving a cooling effect on the local high temperature of the air-cooled box.

[0011] In one of the embodiments, the inner shell encloses a combustion chamber, and in the direction of airflow through the combustion chamber, the partition is arranged at one end of the air-cooled box close to the upstream of the combustion chamber.

[0012] The air-cooling box for a gas water heater described in the utility model has the following beneficial effects: since the end of the air-cooling box close to the upstream of the combustion chamber is the end with a relatively higher temperature, a partition is arranged in this section of the air-cooling box, and a double-layer air-cooling channel can be formed at the end with a higher temperature of the air-cooling box, thereby increasing the cooling effect of the end with a higher temperature of the air-cooling box, avoiding the problem of excessive local temperature rise of the air-cooling box, and reducing the amount of material used for the partition, which has a significant cost advantage and achieves multiple goals at one stroke.

[0013] In one of the embodiments, a plurality of air inlet groups are sequentially arranged along the airflow direction of the combustion chamber, and a total air inlet area of ​​each air inlet group gradually increases in the airflow direction of the combustion chamber.

[0014] The air-cooled box for a gas water heater described in the utility model has the following beneficial effects: by arranging a plurality of groups of air inlet groups in sequence along the guiding direction of the combustion chamber, and arranging the total air inlet area of ​​each group to gradually increase in the direction of air flow through the combustion chamber, the total air inlet area near the downstream end of the combustion chamber is made larger than the total air inlet area near the upstream end of the combustion chamber, so that the cold air pressure near the downstream end of the combustion chamber is greater than the cold air pressure near the upstream end of the combustion chamber, that is, there is a pressure difference, so that the two streams of cold air can flow smoothly to the air outlet group after merging, thereby improving the turbulence phenomenon, improving the flow performance of the cold air, and facilitating the heat exchange of the cold air.

[0015] In one embodiment, the total air inlet area of ​​all the air inlet groups is smaller than the total air outlet area of ​​the air outlet groups.

[0016] The air-cooled box for a gas water heater described in the utility model has the following beneficial effects: by making the total air inlet area of ​​all air inlet groups smaller than the total air outlet area of ​​the air outlet groups, it is convenient to ensure that the air intake volume meets the use requirements while reducing the fan speed, thereby reducing the noise generated by the fan, and at the same time, the fan performance can also be reduced as needed, thereby reducing costs.

[0017] In one embodiment, the partition includes a first bending section, a second bending section, a third bending section and a diverter section connected in sequence; one end of the first bending section is connected to the inner shell body, the first bending section is abutted against the inner bottom wall of the outer shell body, the second bending section is abutted against the inner side wall of the outer shell body, the third bending section extends obliquely from the second bending section into the air-cooling chamber, and the diverter section is arranged parallel to the inner wall surface of the outer shell body.

[0018] The air-cooled box for a gas water heater described in the utility model has the following beneficial effects: by inclining and extending the third bending section with the second bending section toward the inside of the air-cooled chamber, and arranging the diversion section parallel to the inner wall surface of the outer shell, diversion is formed when the cold air flows to the diversion section, and the poor thermal conductivity of air is utilized to achieve a double-layer insulation effect, thereby further reducing the temperature rise of the air-cooled chamber.

[0019] In one embodiment, the height difference between the end of the diversion section away from the third bending section and the central axis of the air outlet group is H1, and the height difference between the central axis of the air outlet group and the outer bottom wall of the shell is H2, satisfying H1≥AH2, 3≥A≥2.

[0020] In one embodiment, a height H3 of the portion where the second bending section abuts against the outer shell is 7-10 mm.

[0021] In one embodiment, the spacing between the first air flow channels is W1, the spacing between the second air flow channels is W2, and the width of the air cooling chamber is W, satisfying W1≥1 / 2W>W2≥2mm.

[0022] The air-cooled box for a gas water heater described in the utility model has the following beneficial effects: by setting W1≥1 / 2W>W2, the first air flow channel is made wider than the second air flow channel. Compared with the second air flow channel, there is more cold air in the first air flow channel, which is convenient for better heat insulation and thus reduces the temperature of the outer shell.

[0023] The above second technical problem is solved by the following technical solution:

[0024] A gas water heater comprises a burner assembly and the above-mentioned air-cooling box for the gas water heater connected to the burner assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 An exploded view of an air-cooled box provided in an embodiment of the utility model;

[0027] Figure 2 A cross-sectional view of an air-cooled box provided in an embodiment of the utility model;

[0028] Figure 3 for Figure 2 A partial enlarged schematic diagram of part B;

[0029] Figure 4 A partial cross-sectional view of the air-cooled box and the heat exchanger after installation provided by the embodiment of the utility model;

[0030] Figure 5 An exploded view of the entire gas water heater provided by an embodiment of the utility model;

[0031] Description of reference numerals:

[0032] 1. Air-cooled box; 11. Inner shell; 111. Air outlet group; 112. Boss structure; 113. First outer edge flange; 114. Third outer edge flange; 115. Insertion protrusion; 116. U-shaped inner plate; 117. Front inner plate; 118. Combustion chamber; 12. Outer shell; 121. Air inlet group; 122. First positioning flange; 123. Insertion slot; 124. Second outer edge flange; 125. U-shaped frame; 126. Front cover; 13. Air-cooled chamber; 131. First air flow channel; 132. Second air flow channel; 14. Separator; 141. First bending section; 142. Second bending section; 143. Third bending section; 144. Diverter section;

[0033] 2. Heat exchanger; 21. Heat exchanger;

[0034] 3. Smoke exhaust device;

[0035] 4. Burner assembly. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0037] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0038] The terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0039] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0040] In conventional technology, the air intake of the air-cooled combustion chamber is divided into two modes: forward air intake and reverse air intake. Specifically, when the forward air intake mode is adopted, the cold air flows from bottom to top in the chamber with the fan suction force, resulting in a higher temperature rise in the upper part of the air-cooled chamber. When the reverse air intake mode is adopted, the cold air flows from top to bottom in the chamber. As a result, the temperature rise in the lower part of the air-cooled chamber is higher. This application takes reverse air intake as an example to simplify the internal structure of the air-cooled box and reduce production costs.

[0041] Specifically, participation Figures 1 to 5 , Figure 1 An exploded view of an air-cooled box in an embodiment of the present application is shown; Figure 2 A cross-sectional view of an air-cooled box in an embodiment of the present application is shown. Figure 2 The direction of the middle arrow is the air inlet direction of the air-cooled box; Figure 3 for Figure 2 A partial enlarged schematic diagram of part B in the figure. Figure 3 The direction of the middle arrow is the guiding direction of the combustion chamber; Figure 4 A partial cross-sectional view of the air-cooling box and the heat exchanger provided in the embodiment of the present application after installation is shown; Figure 5 An exploded view of the entire gas water heater provided in an embodiment of the present application is shown.

[0042] The present application provides an air-cooled box for a gas water heater, such as Figures 1 to 4 As shown, the air-cooling box 1 is a frame structure with two ends opening and connecting. The air-cooling box 1 includes an inner shell 11, an outer shell 12, an air-cooling chamber 13 formed between the inner shell 11 and the outer shell 12, and a partition 14 arranged in the air-cooling chamber 13. An air outlet group 111 for air to flow out of the air-cooling chamber 13 is arranged at a position opposite to the inner shell 11 and the partition 14, and an air inlet group 121 for air to enter the air-cooling chamber 13 is arranged at the outer shell 12 and the partition 14. The partition 14 and the inner shell 11 are an integrally formed structure. Such an arrangement facilitates the realization of a double-layer air flow channel without increasing the number of parts, reduces the assembly process of the whole machine, facilitates the installation of the whole machine, and reduces the difficulty and cost of the parts production process. In an alternative embodiment, the partition 14 can also be integrally formed with the outer shell 12.

[0043] like Figure 2 and Figure 3 As shown, a first air flow channel 131 is formed between the partition 14 and the outer shell 12, and a second air flow channel 132 is formed between the partition 14 and the inner shell 11, and the first air flow channel 131 and the second air flow channel 132 are connected. In this way, the air flow in the first air flow channel 131 can flow into the second air flow channel 132. The partition 14 is provided in the cold air box 1, so that a double-layer air flow channel is formed in the air-cooling chamber 13, thereby enhancing the cooling effect of the local high temperature of the air-cooling box 1.

[0044] It can be explained that the inner shell 11 encloses and forms a combustion chamber 118, and in the direction of air flow through the combustion chamber 118, the partition 14 is arranged at one end of the air-cooled box 1 close to the upstream of the combustion chamber 118. For example, when the openings at both ends of the air-cooled box 1 are arranged up and down, and the heat flow in the inner shell 11 flows from bottom to top, the partition 14 is arranged at the lower end of the air-cooled box 1; when the openings at both ends of the air-cooled box 1 are arranged horizontally, and the heat flow in the inner shell 11 flows from left to right, the partition 14 is arranged at the left end of the air-cooled box 1. In this way, a double-layer air-cooling channel can be formed at the end of the air-cooled box 1 with a higher temperature, thereby increasing the cooling effect at the end of the air-cooled box 1 with a higher temperature, avoiding the problem of excessive local temperature rise of the air-cooled box 1, and reducing the amount of material used for the partition 14, which has a significant cost advantage and achieves multiple goals at one stroke.

[0045] It can be explained that there are multiple groups of air inlet groups 121 arranged in sequence along the air flow direction of the combustion chamber 118, and in the air flow direction of the combustion chamber 118, the total air inlet area of ​​each group of air inlet groups 121 gradually increases. In this way, the total air inlet area near the downstream end of the combustion chamber 118 is larger than the total air inlet area near the upstream end of the combustion chamber 118, so that the cold air pressure near the downstream of the combustion chamber 118 is greater than the cold air pressure near the upstream of the combustion chamber 118, that is, there is a pressure difference, which is convenient for the two cold winds to flow smoothly to the air outlet group 111 after merging, improving the turbulent flow phenomenon, improving the flow performance of the cold air, and facilitating the heat exchange of the cold air. Preferably, there are three groups of air inlet groups 121. At this time, the air inlet in the air inlet group 121 downstream of the combustion chamber 118 and the air inlet in the air inlet group 121 upstream of the combustion chamber 118 are arranged in a staggered manner.

[0046] It can be explained that if Figure 1 and Figure 2 As shown, any air inlet group 121 is provided with a plurality of air inlets arranged circumferentially around the outer shell 12; similarly, the air outlet group 111 is provided with a plurality of air outlets arranged circumferentially around the inner shell 11. Such an arrangement facilitates symmetry and uniformity of air intake.

[0047] It can be explained that the total air inlet area of ​​all air inlet groups 121 is smaller than the total air outlet area of ​​the air outlet group 111. This arrangement is convenient for ensuring that the air intake meets the use requirements while reducing the fan speed, thereby reducing the noise generated by the fan, and at the same time, the fan performance can be reduced as needed, thereby reducing costs.

[0048] like Figure 2 and Figure 3 As shown, the separator 14 includes a first bending section 141, a second bending section 142, a third bending section 143 and a diverter section 144 connected in sequence; one end of the first bending section 141 is connected to the inner shell 11, the first bending section 141 abuts against the inner bottom wall of the outer shell 12, the second bending section 142 abuts against the inner side wall of the outer shell 12, the third bending section 143 extends obliquely from the second bending section 142 into the air-cooling chamber 13, and the diverter section 144 is arranged parallel to the inner wall surface of the outer shell 12. In this arrangement, when the cold air flows to the diverter section 144, a diversion is formed, and the poor thermal conductivity of air is used to achieve a double-layer thermal insulation effect, further reducing the temperature rise of the air-cooling chamber.

[0049] It can be explained that there is no specific limitation on the length of the diverter section 144. For example, a gap is left between the end of the diverter section 144 away from the third bending section 143 and the inner top wall of the outer shell 12. At this time, the second bending section 142, the third bending section 143 and the diverter section 144 form a Z-shaped bending part, so that a local double-layer flow channel is formed in the air-cooling chamber 13. Due to the poor thermal conductivity of air, it is easy to reduce the temperature rise of the outer shell 12 and the inner shell 11.

[0050] It can be explained that the height difference between the end of the diverter section 144 away from the third bending section 143 and the central axis of the air outlet group is H1, and the height difference between the central axis of the air outlet group and the outer bottom wall of the outer shell 12 is H2, which satisfies H1≥AH2, 3≥A≥2, and H2 is preferably 8-10mm. This arrangement can save costs and facilitate the formation of a double-layer diverter structure.

[0051] It can be explained that, in order to ensure the reliability of the connection between the partition 14 and the outer shell 12 after installation, the height H3 of the abutting portion between the second bending section 142 and the outer shell 12 is preferably 7-10 mm.

[0052] It can be explained that the spacing of the first air flow channel 131 is W1, the spacing of the second air flow channel 132 is W2, the width of the air cooling chamber 13 is W, and W1≥1 / 2W>W2≥2mm is satisfied, and W is preferably 5-6mm. In this way, the first air flow channel 131 is wider than the second air flow channel 132. Compared with the second air flow channel 132, there is more cold air in the first air flow channel 131, which is convenient for better heat insulation, thereby reducing the temperature of the outer shell 12.

[0053] like Figure 1 As shown, the inner shell 11 and the outer shell 12 form an air-cooling chamber 13 arranged circumferentially, or a plurality of independent air-cooling chambers 13 arranged circumferentially.

[0054] It can be explained that there is no specific limitation on the shape of the outer shell 12. For example, the outer shell 12 is in the form of a four-sided enclosure structure. Specifically, the outer shell 12 is formed by splicing a U-shaped enclosure 125 and a front cover 126. The U-shaped enclosure 125 is formed by bending a plate multiple times to form three side plates, and the material is selected from a heat-reflective insulation material, such as an aluminum plate, a galvanized plate or stainless steel.

[0055] Similarly, the shape of the inner shell 11 is not specifically limited. For example, the inner shell 11 is in the form of a four-sided enclosed structure. Specifically, the inner shell 11 is formed by splicing a U-shaped inner plate 116 and a front inner plate 117. At this time, the U-shaped inner plate 116 is formed by bending a plate multiple times to form three side plates, and the material is selected from a heat-reflective insulation material, such as an aluminum plate, a galvanized plate or stainless steel.

[0056] During installation, the U-shaped inner plate 116 is installed on the inner side of the U-shaped frame 125, and the front cover plate 126 is installed on the inner side of the front inner plate 117, and then the assembly is performed. After the U-shaped inner plate 116, the U-shaped frame 125, the front cover plate 126 and the front inner plate 117 are assembled, a circumferentially arranged air-cooling chamber 13 is formed, and the air-cooling chamber 13 is composed of four interconnected sub-chambers, and each sub-chamber corresponds to three groups of air inlet groups 121 and one group of air outlet groups 111.

[0057] It can be explained that the top edges of the two side panels opposite to the U-shaped inner panel 116 are both provided with a first outer edge flange 113, and the first outer edge flange 113 is arranged horizontally as a whole. The U-shaped frame 125 is provided with a second outer edge flange 124 for supporting the first outer edge flange 113. After the two outer edge flanges are stacked, they can be fixed with fasteners such as bolts. After fixing, two installation base surfaces for installing the heat exchanger 2 are obtained.

[0058] like Figure 1 and Figure 4 As shown, the other side plate of the U-shaped inner plate 116 and the top edge of the front inner plate 117 are each provided with a boss structure 112 protruding toward one side of the combustion chamber 118, so that the U-shaped inner plate 116 is high in the middle and low on both sides. After the heat exchanger 2 is installed on the mounting base, the two boss structures 112 are used to fill the gap between the heat exchange plate 21 at the outer edge of the heat exchanger 2 and the inner wall of the inner shell 11, avoiding the use of refractory materials such as aluminum silicate wool to fill the gap when there is a gap, thereby reducing the number of parts used, and avoiding smoke from overflowing through the gap, reducing heat loss.

[0059] Furthermore, the U-shaped frame 125 is provided with at least one pair of first positioning flanges 122 , which are arranged to extend vertically, and the two first positioning flanges 122 are respectively used to abut against two oppositely disposed outer side walls of the boss structure 112 of the U-shaped inner plate 116 .

[0060] like Figure 1 As shown, the side edges of the two side plates opposite to each other of the U-shaped inner plate 116 are both provided with third outer edge flanges 114, the two second outer edge flanges 124 are both provided with plugging protrusions 115, and the outer shell 12 is provided with plugging grooves 123 plugged with the plugging protrusions 115. When installed, the plugging protrusions 115 are plugged into the plugging grooves 123. In this way, the number of parts can be reduced by setting the plugging protrusions 115 and the plugging grooves 123.

[0061] The U-shaped inner plate 116 and the front inner plate 117 are fixed by a disassembly connection. Specifically, the U-shaped inner plate 116 and the front inner plate 117 are both provided with a plurality of mounting holes, among which the mounting holes of the third outer edge flange 114 are horizontally arranged waist-shaped holes. During installation, a fastener with an external thread such as a bolt is sequentially inserted through a mounting hole of the front inner plate 117 and a waist-shaped hole of the third outer edge flange 114, and then fastened with a nut, and this installation process is repeated until no mounting hole is missed.

[0062] Similarly, the U-shaped inner plate 116 and the U-shaped frame 125 are fixed by a disassembly connection method. Specifically, the U-shaped inner plate 116 is placed inside the U-shaped frame, and the first outer edge flange 113 is aligned with the second outer edge flange 124, and the pair of positioning flanges are ensured to accurately position the boss structure 112 of the U-shaped inner plate 116, and the plug-in protrusion 115 is plugged into the plug-in groove 123, and then it can be fixed with bolts or other fasteners.

[0063] Similarly, the front cover plate 126 and the front inner plate 117 are fixed by a disassembly connection method. They are also fixed by fasteners such as bolts, which will not be described in detail.

[0064] The present application also provides a gas water heater, such as Figure 5 As shown, it includes a burner assembly 4 and an air-cooled box 1 for a gas water heater as described above connected to the burner assembly 4. Specifically, the combustion assembly is installed upstream of the combustion chamber 118 in the air-cooled box 1, and the heat exchanger 2 and the smoke exhaust device 3 are installed downstream.

[0065] In the specific contents of the above-mentioned specific implementation methods, the various technical features can be combined in any non-contradictory manner. In order to make the description concise, not all possible combinations of the above-mentioned technical features are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0066] The specific contents of the above specific implementations only express several implementations of the utility model, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. An air-cooled box for a gas water heater, characterized in that: The air-cooling box (1) is a frame structure with two ends of openings connected to each other. The air-cooling box (1) comprises an inner shell (11), an outer shell (12), an air-cooling chamber (13) formed between the inner shell (11) and the outer shell (12), and a partition (14) arranged in the air-cooling chamber (13); an air outlet group (111) for air to flow out of the air-cooling chamber (13) is arranged at a position where the inner shell (11) and the partition (14) are opposite to each other; the outer shell (12) is provided with an air inlet group (121) for air to enter the air-cooling chamber; and at least one group of the air inlet groups (121) is arranged at a position where the outer shell (12) and the partition (14) are opposite to each other; the partition (14) and the inner shell (11) are an integrally formed structure; or the partition (14) and the outer shell (12) are an integrally formed structure.

2. The air-cooled box for a gas water heater according to claim 1, characterized in that: A first air flow channel (131) is formed between the partition (14) and the outer shell (12), and a second air flow channel (132) is formed between the partition (14) and the inner shell (11); the first air flow channel (131) and the second air flow channel (132) are in communication with each other.

3. The air-cooled box for a gas water heater according to claim 2, characterized in that: The inner shell (11) encloses a combustion chamber (118), and in the direction of airflow passing through the combustion chamber (118), the partition (14) is arranged at an end of the air-cooled box (1) close to the upstream of the combustion chamber (118).

4. The air-cooled box for a gas water heater according to claim 3, characterized in that: The air inlet groups (121) are arranged in multiple groups in sequence along the air flow direction of the combustion chamber (118), and in the air flow direction of the combustion chamber (118), the total air inlet area of ​​each group of the air inlet groups (121) gradually increases.

5. The air-cooled box for a gas water heater according to claim 2, characterized in that: The total air inlet area of ​​all the air inlet groups (121) is smaller than the total air outlet area of ​​the air outlet groups (111).

6. The air-cooled box for a gas water heater according to any one of claims 2 to 5, characterized in that: The partition (14) comprises a first bending section (141), a second bending section (142), a third bending section (143) and a diverter section (144) which are connected in sequence; one end of the first bending section (141) is connected to the inner shell (11); the first bending section (141) abuts against the inner bottom wall of the outer shell (12); the second bending section (142) abuts against the inner side wall of the outer shell (12); the third bending section (143) extends obliquely from the second bending section (142) into the air-cooling chamber (13); and the diverter section (144) is arranged parallel to the inner wall surface of the outer shell (12).

7. The air-cooled box for a gas water heater according to claim 6, characterized in that: The height difference between the end of the diversion section (144) away from the third bending section (143) and the central axis of the air outlet group (111) is H1, and the height difference between the central axis of the air outlet group (111) and the outer bottom wall of the outer shell (12) is H2, satisfying H1≥AH2, 3≥A≥2.

8. The air-cooled box for a gas water heater according to claim 6, characterized in that: The height H3 of the portion where the second bending section (142) abuts against the outer shell (12) is 7-10 mm.

9. The air-cooled box for a gas water heater according to claim 6, characterized in that: The spacing between the first air flow channels (131) is W1, the spacing between the second air flow channels (132) is W2, and the width of the air cooling chamber (13) is W, satisfying W1≥1 / 2W>W2≥2mm.

10. A gas water heater, characterized in that: The invention comprises a burner assembly and an air-cooled box for a gas water heater as described in any one of claims 1 to 9 connected to the burner assembly.

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