Combustion chamber and heat exchange equipment

Abstract

The utility model relates to a combustion chamber and heat exchange equipment. The combustion chamber comprises a main shell forming a combustion cavity; the at least one heat insulation plate is mounted on the inner wall of the main shell, and a cooling air duct is formed between the heat insulation plate and the inner wall of the main shell; wherein at least part of the heat insulation plate is provided with at least one protruding part, and the protruding part is arranged in a protruding mode opposite to the inner wall of the main shell. According to the combustion chamber, compared with a flat-plate-shaped heat insulation plate, the heat insulation plate provided with the protruding parts has high structural strength, so that the heat insulation plate is effectively prevented from being heated and deformed, the shape of the cooling air channel is kept stable, smooth flowing of airflow is guaranteed, and the good cooling effect is maintained. And moreover, as the lug bosses are convexly arranged back on to the inner wall of the main shell, the ventilation area of the cooling air duct is ensured, and the cooling effect of the cooling air duct is further improved.

Description

Technical Field

[0001] The present application relates to the field of heat exchange technology, and in particular to a combustion chamber and a heat exchange device. Background Art

[0002] With the progress of society and the improvement of living standards, gas water heaters, as an electrical appliance that provides people with hot water, have been widely used in people's lives, bringing convenience to people's lives and significantly improving people's quality of life.

[0003] Most existing gas water heaters use coil heat exchangers, where several turns of copper tubes are wrapped around the outside of the combustion chamber wall to reduce the temperature of the combustion chamber. After using this type of heat exchanger for a period of time, condensed water is easily generated on the tube wall, which in turn causes corrosion and leakage of the copper tube wall, shortening the service life of the heat exchanger. In order to increase the corrosion resistance of the surface, some water heaters add anti-corrosion coatings on the inside and outside of the copper tube wall. Although this method can improve the corrosion resistance, the cost of use is very high, and the heavy metal elements in the coating pose a risk of polluting the environment.

[0004] In order to solve the above problems, a coilless combustion solution came into being. This solution cancels the external coil and uses a heat insulation board to form an air cooling duct during combustion to reduce the outer surface temperature of the combustion chamber, effectively reducing costs and reducing the failure rate of gas water heaters. However, due to the high temperature in the combustion chamber, the existing heat insulation board is easy to deform under high temperature conditions, which has become a technical problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0005] Based on this, it is necessary to provide a combustion chamber and heat exchange equipment to address the problem that the insulation board is easily deformed at high temperatures.

[0006] A combustion chamber comprising:

[0007] a main housing forming a combustion chamber; and

[0008] At least one heat insulation board is installed on the inner wall of the main shell, and a cooling air duct is formed between the heat insulation board and the inner wall of the main shell;

[0009] Wherein, at least part of the heat insulation board has at least one protrusion, and the protrusion is protruded away from the inner wall of the main shell.

[0010] In one embodiment, the heat insulation board has a mounting portion, and the mounting portion is protruded toward the inner wall of the main shell so as to contact and be fixed to the main shell.

[0011] In one of the embodiments, a heat insulation board mounting hole is provided at a portion of the mounting portion contacting the main shell, and a main shell mounting hole is provided at the main shell corresponding to the heat insulation board mounting hole; the combustion chamber also includes a fastener, and the fastener passes through the heat insulation board mounting hole and the main shell mounting hole to fix the heat insulation board and the main shell.

[0012] In one embodiment, the main housing includes a first side plate, a second side plate, a third side plate and a fourth side plate connected end to end, and the first side plate and the third side plate are spaced apart in a first direction, and the second side plate and the fourth side plate are spaced apart in a second direction perpendicular to the first direction;

[0013] The heat insulation board includes two first heat insulation boards and two second heat insulation boards, the two first heat insulation boards are respectively installed on the first side board and the third side board, and the two second heat insulation boards are respectively installed on the second side board and the fourth side board.

[0014] In one embodiment, the first heat insulation board has two first protrusions and two first mounting portions, the two first protrusions are spaced apart in the third direction, and the two first mounting portions are spaced apart between the two first protrusions in the second direction; and / or

[0015] The second heat insulation board has two second mounting portions, and the two second mounting portions are spaced apart in the first direction;

[0016] Wherein, the third direction is perpendicular to the first direction and the second direction respectively.

[0017] In one of the embodiments, at least a portion of the edges of the heat insulation board are provided with a bent edge, and the bent edge is bent and extended toward the inner wall of the main shell.

[0018] In one embodiment, at least a portion of the heat insulation board forms a connecting hole, and one end of the supporting portion is connected to a side edge of the connecting hole.

[0019] In one of the embodiments, the width of the bent edge in a direction perpendicular to the inner wall of the main shell is smaller than the height of the mounting portion in a direction perpendicular to the inner wall of the main shell.

[0020] In one embodiment, at least a portion of the heat insulation board has a support portion, one end of the support portion is connected to the heat insulation board, and the other end of the support portion is bent and extended toward the inner wall of the main shell.

[0021] In one of the embodiments, a height of the support portion in a direction perpendicular to an inner wall of the main shell is smaller than a height of the mounting portion in a direction perpendicular to the inner wall of the main shell.

[0022] A heat exchange device comprises the above-mentioned combustion chamber.

[0023] In one of the embodiments, the heat exchange device further comprises a heat exchanger, wherein the heat exchanger is mounted at one end of the combustion chamber, and a guide plate is protrudingly provided at one end of the main shell of the combustion chamber close to the heat exchanger.

[0024] In one embodiment, the guide plate includes a first guide portion and a second guide portion, the first guide portion is connected to the edge of the main shell and extends vertically upward, the second guide portion is connected to a side of the first guide portion away from the main shell, and the second guide portion extends obliquely from a side close to the first guide portion to a side away from the first guide portion in a direction away from the combustion chamber.

[0025] In one embodiment, the angle formed by the side surface of the second guide portion facing away from the combustion chamber and the side surface of the first guide portion facing away from the combustion chamber is 90°-180°. In one embodiment, the heat exchange device further includes a burner, the burner is mounted at one end of the combustion chamber, and the burner is provided with an air inlet hole connected to the cooling air duct.

[0026] In one embodiment, the heat exchange device is a coilless gas water heater.

[0027] Compared with a flat heat shield, the heat shield provided with the protrusion in the combustion chamber has a higher structural strength, thereby effectively preventing the heat shield from being deformed by heat, thereby keeping the shape of the cooling air duct stable to ensure smooth flow of airflow and maintain a good cooling effect. Moreover, since the protrusion is arranged to protrude away from the inner wall of the main shell, the ventilation area of ​​the cooling air duct is ensured, further improving the cooling effect of the cooling air duct. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] FIG. 1 is a schematic structural diagram of a heat exchange device according to an embodiment of the present application.

[0029] FIG. 2 is a schematic structural diagram of a combustion chamber according to an embodiment of the present application.

[0030] FIG3 is a schematic structural diagram of a first heat insulation plate of a combustion chamber according to an embodiment of the present application.

[0031] FIG. 4 is a schematic structural diagram of a second heat insulation plate of a combustion chamber according to an embodiment of the present application.

[0032] Description of reference numerals:

[0033] 100, heat exchange equipment; 20, combustion chamber; 21, main shell; 21a, combustion chamber; 21b, cooling air duct; 211, first side plate; 212, second side plate; 213, third side plate; 214, fourth side plate; 215, guide plate; 215a, first guide portion; 215b, second guide portion; 216, first fixed edge; 217, second fixed edge; 23, first heat insulation board; 232, first protrusion; 234, first mounting portion; 234a, first heat insulation board mounting hole; 236, first bent edge; 238, first supporting portion; 25, second heat insulation board; 252, second mounting portion; 252a, second heat insulation board mounting hole; 254, second bent edge; 256, second supporting portion; 40, burner; 41, burner fixed edge; 41a, air inlet; 60, heat exchanger. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0035] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does 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 cannot be understood as a limitation on the present application.

[0036] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0037] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0038] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0039] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0040] Referring to FIG. 1 , an embodiment of the present application provides a heat exchange device 100. Specifically, in the following embodiments, the heat exchange device 100 is a non-coil gas water heater, including a combustion chamber 20 and a burner 40 and a heat exchanger 60 respectively disposed at opposite ends of the combustion chamber 20. The gas burns in the burner 40 to generate flames and high-temperature flue gas. The high-temperature flue gas exchanges heat with cold water in the heat exchanger 60. The cold water absorbs the heat in the high-temperature flue gas and becomes hot water for users to use. The combustion chamber 20 is located between the burner 40 and the heat exchanger 60, which increases the distance between the flame and the heat exchanger 60, and prevents the heat exchanger 60 from being too close to the flame, resulting in a short contact time between the high-temperature flue gas and the heat exchanger 60, and low heat exchange efficiency.

[0041] Since the temperature of the high-temperature flue gas generated during combustion can reach 800° C.-900° C., an air cooling channel is provided in the combustion chamber 20 , and the air cooling channel is connected to the external atmosphere, so that the temperature of the combustion chamber 20 is reduced by using the external cold air.

[0042] Please refer to Figures 1 and 2. The combustion chamber 20 includes a main shell 21 and at least one heat insulation board. The main shell 21 is a hollow shell-like structure. A combustion chamber 21a for accommodating high-temperature flue gas is formed in the main shell 21. All heat insulation boards are installed on the inner wall of the main shell 21. A cooling air duct 21b is formed between the heat insulation board and the inner wall of the main shell 21. Among them, at least part of the heat insulation board has at least one protrusion, and the protrusion is protruded away from the inner wall of the main shell 21. As a preferred embodiment, the protrusion height of the protrusion is 1.5 mm.

[0043] Compared with a flat heat insulation board, the heat insulation board with the protrusion has a higher structural strength, thus effectively preventing the heat insulation board from being deformed by heat, thereby keeping the shape of the cooling air duct 21b stable to ensure smooth flow of airflow and maintain a good cooling effect. Moreover, since the protrusion is protruded away from the inner wall of the main shell 21, the ventilation area of ​​the cooling air duct 21b is guaranteed, further improving the cooling effect of the cooling air duct 21b.

[0044] Furthermore, in order to achieve the fixation of the heat insulation board, each heat insulation board also has a mounting portion, which is protruded toward the inner wall of the main shell 21 to contact and be fixed to the main shell 21. In other words, the mounting portion and the protruding direction of the protruding portion are opposite. In this way, the heat insulation board is fixed to the main shell 21 through the mounting portion, and since the mounting portion is in contact with the main shell 21, a good fastening effect can be achieved.

[0045] Specifically in some embodiments, a heat shield mounting hole is provided at a portion of the mounting portion contacting the main housing 21, and a main housing mounting hole corresponding to the heat shield mounting hole is provided at the main housing 21. The combustion chamber 20 further includes a fastener, which passes through the heat shield mounting hole and the main housing mounting hole to fix the heat shield to the main housing 21. As a preferred embodiment, the fastener is a rivet, and the material of the rivet is preferably high temperature resistant stainless steel.

[0046] In some embodiments, at least part of the edge of the heat insulation board is provided with a bent edge, and the bent edge is bent and extended toward the inner wall of the main shell 21, thereby effectively preventing the edge of the heat insulation board from being deformed by heat. As a preferred embodiment, the width of the bent edge in the direction perpendicular to the inner wall of the main shell 21 is smaller than the height of the mounting portion in the direction perpendicular to the inner wall of the main shell 21, thereby avoiding interference with the mounting portion and affecting the fixation of the heat insulation board. Specifically in one embodiment, the difference between the width of the bent edge in the direction perpendicular to the inner wall of the main shell 21 and the height of the mounting portion in the direction perpendicular to the inner wall of the main shell 21 is 0.5 mm.

[0047] In some embodiments, at least part of the heat insulation board has a support portion, and the heat insulation board forms a rectangular connecting hole, one end of the support portion is connected to one side edge of the connecting hole, and the other end of the support portion is bent and extended toward the inner wall of the main shell 21, thereby further preventing the edge of the heat insulation board from being deformed by heat. Further, in some embodiments, the height of the support portion in a direction perpendicular to the inner wall of the main shell 21 is less than the height of the mounting portion in a direction perpendicular to the inner wall of the main shell 21, thereby avoiding interference. As a preferred embodiment, the height of the support portion in a direction perpendicular to the inner wall of the main shell 21 is less than the width of the bending edge in a direction perpendicular to the inner wall of the main shell 21. Specifically in one embodiment, the difference between the height of the support portion in a direction perpendicular to the inner wall of the main shell 21 and the width of the bending edge in a direction perpendicular to the inner wall of the main shell 21 is 0.5 mm.

[0048] Please continue to refer to Figures 2 to 4. Specifically in one embodiment, the main shell 21 is a hollow cube-shaped structure with openings at both ends. The width direction of the main shell 21 is defined as the first direction (i.e., the X direction in Figure 1), the length direction of the main shell 21 is defined as the second direction (i.e., the Y direction in Figure 1), and the height direction of the main shell 21 is defined as the third direction (i.e., the Z direction in Figure 1). The first direction, the second direction, and the third direction are perpendicular to each other.

[0049] Furthermore, the main housing 21 includes a first side plate 211, a second side plate 212, a third side plate 213 and a fourth side plate 214 connected end to end. The first side plate 211 and the third side plate 213 are parallel and spaced in a first direction, and the second side plate 212 and the fourth side plate 214 are parallel and spaced in a second direction perpendicular to the first direction. As a preferred embodiment, the second side plate 212, the third side plate 213 and the fourth side plate 214 are integrally formed to form a whole, and the third side plate 213 is provided with flanges on opposite sides in the second direction to wrap the second side plate 212 and the fourth side plate 214, and then fixed to each other by welding.

[0050] The heat insulation board includes two first heat insulation boards 23 and two second heat insulation boards 25 . The two first heat insulation boards 23 are respectively installed on the first side board 211 and the third side board 213 . The two second heat insulation boards 25 are respectively installed on the second side board 212 and the fourth side board 214 .

[0051] The first heat insulation board 23 is substantially rectangular, and has two first protrusions 232 and two first mounting portions 234. The two first protrusions 232 are arranged at intervals in the third direction, and the two first protrusions 232 are symmetrically arranged with the central axis of the first heat insulation board 23 extending along the third direction as the symmetry axis. The two first mounting portions 234 are arranged at intervals between the two first protrusions 232 in the second direction.

[0052] Furthermore, each first mounting portion 234 has a circular projection on the first side plate 211 or the third side plate 213, and the outer diameter of the first mounting portion 234 gradually decreases from the end away from the main shell 21 to the end close to the main shell 21. The center position of the first mounting portion 234 contacts the first side plate 211 or the third side plate 213. A first heat insulation board mounting hole 234a is provided at the center position of the first mounting portion 234 contacting the main shell 21. Two first main shell mounting holes are provided on the first side plate 211 and the third side plate 213. The two first main shell mounting holes are spaced apart in the second direction. Fasteners pass through the first heat insulation board mounting hole 234a and the first main shell mounting hole to connect the first heat insulation board 23 with the first side plate 211, or to connect the first heat insulation board 23 with the third side plate 213.

[0053] The first mounting portion 234 is provided in an area of ​​the first heat insulating board 23 where no protrusion is provided, and there is a certain distance between the edge of the first mounting portion 234 and the edge of the first protrusion 232, the edge of the first side plate 211 or the edge of the third side plate 213. Specifically, in some embodiments, the distance between the edge of the first mounting portion 234 and the edge of the first protrusion 232 is greater than 40 mm, and the distance between the edge of the first mounting portion 234 and the edge of the first side plate 211 or the third side plate 213 is greater than 5 mm, thereby further preventing the first heat insulating board 23 from being deformed by heat.

[0054] In some embodiments, the first insulation board 23 has two first bending edges 236, which are respectively formed on opposite sides of the first insulation board 23 in the second direction, and each first bending edge 236 extends from one end of the first insulation board 23 to the other end of the first insulation board 23 along the third direction.

[0055] In some embodiments, the first heat insulation board 23 has two first support portions 238, the two first support portions 238 are respectively located on opposite sides of the first heat insulation board 23 in the third direction, and the two first support portions 238 are located in the central area of ​​the first heat insulation board 23 in the second direction and close to the edge of the first heat insulation board 23 in the third direction. It can be understood that the number of the first support portions 238 is not limited thereto, and can be set as needed to meet different strength requirements.

[0056] The area of ​​the second heat insulation board 25 is smaller than that of the first heat insulation board 23, so no protrusion is provided but only two second mounting parts 252 are provided, and the two second mounting parts 252 are arranged at intervals in the first direction. Further, each second mounting part 252 is circular in orthographic projection on the second side plate 212 or the fourth side plate 214, and the outer diameter of the second mounting part 252 gradually decreases from the end away from the main shell 21 to the end close to the main shell 21, and the center position of the second mounting part 252 contacts the second side plate 212 or the fourth side plate 214, and a second heat insulation board mounting hole 252a is provided at the center position of the second mounting part 252 contacting the main shell 21, and two second main shell mounting holes are provided on the second side plate 212 and the fourth side plate 214, and the two second main shell mounting holes are arranged at intervals in the first direction, and fasteners pass through the second heat insulation board mounting hole 252a and the second heat insulation board mounting hole 252a to connect the first heat insulation board 23 with the second side plate 212, or connect the first heat insulation board 23 with the fourth side plate 214.

[0057] In some embodiments, the second insulation board 25 has two second bending edges 254, which are respectively formed on opposite sides of the second insulation board 25 in the first direction, and each second bending edge 254 extends from one end of the second insulation board 25 to the other end of the second insulation board 25 along the third direction.

[0058] In some embodiments, the second heat insulation board 25 has two second support portions 256, which are respectively located on opposite sides of the second heat insulation board 25 in the third direction, and the two second support portions 256 are located in the central area of ​​the second heat insulation board 25 in the first direction and close to the edge of the second heat insulation board 25 in the third direction. It can be understood that the number of the second support portions 256 is not limited thereto, and can be set as needed to meet different strength requirements.

[0059] When installing the first heat insulation board 23 and the second heat insulation board 25, first install the two second heat insulation boards 25 and fix the second heat insulation boards 25 to the main shell 21 by fasteners, and then install the two first heat insulation boards 23, and the bending edges of the two first heat insulation boards 23 are both attached to the surface of the second heat insulation board 25. In this way, the area of ​​the first heat insulation board 23 and the second heat insulation board 25 is maximized, thereby achieving better heat insulation and cooling effects. In some other embodiments, there may also be a gap between the bending edge of the first heat insulation board 23 and the surface of the second heat insulation board 25.

[0060] Please refer to FIG. 1 and FIG. 2 again. In some embodiments, the heat exchanger 60 is installed at one end of the combustion chamber 20 in the third direction. A guide plate 215 is protruded from one end of the main housing 21 of the combustion chamber 20 near the heat exchanger 60 to facilitate the installation of the heat exchanger 60. Specifically, in one embodiment, the first side plate 211 and the third side plate 213 of the main housing 21 are each provided with a guide plate 215, which extends longitudinally along the second direction, and includes a first guide portion 215a and a second guide portion 215b. The first guide portion 215a is connected to the edge of the first side plate 211 or the third side plate 213 and extends vertically upward along the third direction, one side of the second guide portion 215b is connected to the side of the first guide portion 215a away from the main shell 21, and extends upward obliquely from the side close to the first guide portion 215a to the side away from the first guide portion 215a in a direction away from the combustion chamber 21a, and the angle formed by the side surface of the second guide portion 215b facing away from the combustion chamber 21a and the side surface of the first guide portion 215a facing away from the combustion chamber 21a is 90°-180°.

[0061] The burner 40 is installed at the other end of the combustion chamber 20 in the third direction away from the heat exchanger 60. The burner 40 is provided with an air inlet 41a connected to the cooling air duct 21b. External air can enter the cooling air duct 21b through the air inlet 41a.

[0062] Specifically, in some embodiments, at least two first fixed edges 216 are respectively provided on the edge of one side of the first side plate 211 and the third side plate 213 of the main housing 21 near the burner 40, and all the first fixed edges 216 are arranged at intervals along the first direction, one side of the first fixed edge 216 is folded toward the combustion chamber 21a, and the other side of the first fixed edge 216 extends toward the burner 40 along the third direction, and a first ventilation hole is formed between two adjacent first fixed edges 216. At least two second fixed edges 217 are respectively provided on the edge of one side of the second side plate 212 and the fourth side plate 214 of the main housing 21 near the burner 40, and the second fixed edges 217 are folded toward the combustion chamber 21a, and at least one second ventilation hole is formed between two adjacent second fixed edges 217.

[0063] The burner 40 is provided with burner fixing edges 41 folded outward on both side edges in the first direction, the burner fixing edges 41 are fitted with the second fixing edges 217, and are provided with air inlet holes 41a corresponding to the second ventilation holes. The first fixing edges 216 of the housing are connected to the side walls of the burner 40 by fasteners such as bolts, and the external atmosphere enters the cooling air duct 21b through the gap between the burner 40 and the combustion chamber 20.

[0064] The above-mentioned combustion chamber 20 and heat exchange equipment 100, without affecting the air intake of the cooling air duct 21b, effectively solve the problem of the heat insulation plate being deformed by heat and affecting the air intake through the arrangement of the protrusion, the bent edge and the support portion, and effectively reduce the temperature rise of the outer surface of the combustion chamber 20. At the same time, a guide plate 215 is arranged on the combustion chamber 20, thereby improving the installation efficiency of the heat exchanger 60.

[0065] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments 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 above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A combustion chamber, characterized in that: include: A main housing (21) forming a combustion chamber (21a); as well as At least one heat insulation board is installed on the inner wall of the main shell (21), and a cooling air duct (21b) is formed between the heat insulation board and the inner wall of the main shell (21); At least part of the heat insulation board has at least one protrusion, and the protrusion is arranged to protrude away from the inner wall of the main shell (21).

2. The combustion chamber according to claim 1, characterized in that The heat insulation board has a mounting portion, which is protruding toward the inner wall of the main shell (21) so as to contact and be fixedly connected to the main shell (21).

3. The combustion chamber according to claim 2, characterized in that A heat insulation board mounting hole is provided at a portion of the mounting portion contacting the main shell (21), and a main shell mounting hole is provided on the main shell (21) corresponding to the heat insulation board mounting hole; the combustion chamber also includes a fastener, which passes through the heat insulation board mounting hole and the main shell mounting hole to fix the heat insulation board and the main shell (21).

4. The combustion chamber according to claim 2, characterized in that The main housing (21) comprises a first side plate (211), a second side plate (212), a third side plate (213) and a fourth side plate (214) connected end to end, and the first side plate (211) and the third side plate (213) are arranged at intervals in a first direction, and the second side plate (212) and the fourth side plate (214) are arranged at intervals in a second direction perpendicular to the first direction; The heat insulation board comprises two first heat insulation boards (23) and two second heat insulation boards (25), the two first heat insulation boards (23) are respectively installed on the first side board (211) and the third side board (213), and the two second heat insulation boards (25) are respectively installed on the second side board (212) and the fourth side board (214).

5. The combustion chamber according to claim 4, characterized in that The first heat insulation board (23) has two first protrusions (232) and two first mounting portions (234), the two first protrusions (232) are arranged at intervals in the third direction, and the two first mounting portions (234) are arranged at intervals between the two first protrusions (232) in the second direction; and / or The second heat insulation board (25) has two second mounting portions (252), and the two second mounting portions (252) are arranged at intervals in the first direction; Wherein, the third direction is perpendicular to the first direction and the second direction respectively.

6. The combustion chamber according to claim 2, characterized in that At least part of the edge of the heat insulation board is provided with a bent edge, and the bent edge is bent and extended toward the inner wall of the main shell (21).

7. The combustion chamber according to claim 6, characterized in that The width of the bent edge in a direction perpendicular to the inner wall of the main shell (21) is smaller than the height of the mounting portion in a direction perpendicular to the inner wall of the main shell (21).

8. The combustion chamber according to claim 2, characterized in that At least part of the heat insulation board has a support portion, one end of the support portion is connected to the heat insulation board, and the other end of the support portion is bent and extended toward the inner wall of the main shell (21).

9. The combustion chamber according to claim 8, characterized in that At least a portion of the heat insulation board forms a connecting hole, and one end of the supporting portion is connected to a side edge of the connecting hole.

10. The combustion chamber according to claim 8, characterized in that The height of the support portion in a direction perpendicular to the inner wall of the main housing (21) is smaller than the height of the mounting portion in a direction perpendicular to the inner wall of the main housing (21).

11. A heat exchange device, characterized in that: Comprising a combustion chamber as claimed in any one of claims 1 to 10.

12. The heat exchange device according to claim 11, characterized in that: The heat exchange device further comprises a heat exchanger (60), wherein the heat exchanger (60) is installed at one end of the combustion chamber, and a guide plate (215) is protrudingly provided at one end of the main shell (21) of the combustion chamber close to the heat exchanger (60).

13. The heat exchange device according to claim 12, characterized in that: The guide plate (215) includes a first guide portion (215a) and a second guide portion (215b), wherein the first guide portion (215a) is connected to the edge of the main shell (21) and extends vertically upward, and the second guide portion (215b) is connected to a side of the first guide portion (215a) away from the main shell (21), and the second guide portion (215b) extends obliquely from a side close to the first guide portion (215a) to a side away from the first guide portion (215a) in a direction away from the combustion chamber (21a).

14. The heat exchange device according to claim 13, characterized in that: An angle formed by a side surface of the second guide portion (215b) facing away from the combustion chamber (21a) and a side surface of the first guide portion (215a) facing away from the combustion chamber (21a) is 90°-180°.

15. The heat exchange device according to claim 11, characterized in that: The heat exchange device further comprises a burner (40), wherein the burner (40) is installed at one end of the combustion chamber, and the burner (40) is provided with an air inlet hole (41a) connected to the cooling air duct (21b).

16. The heat exchange device according to claim 11, characterized in that: The heat exchange equipment is a coil-free gas water heater.

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