Heat exchanger and gas water heater

Abstract

A heat exchanger includes an outer frame having a first fluid inlet and a first fluid outlet, and a heat exchange body. A first side wall of the outer frame is provided with a second fluid inlet and a second fluid outlet, or the first side wall and a third side wall are provided with a second fluid inlet and a second fluid outlet respectively; the first fluid inlet and the first fluid outlet are provided along the first direction; the first side wall and the third side wall are provided oppositely along the second direction, and a second side wall and a fourth side wall are provided oppositely along the third direction; the heat exchange body includes a plurality of second fluid chambers stacked along the second direction; a first fluid chamber is formed between two adjacent second fluid chambers.

Description

CROSS-REFERENCE TO RELATED APPLICATION

[0001] The present application claims priority to Chinese patent application No. 202411525329.X, and filed on Oct. 29, 2024, the entire contents of which are incorporated herein by reference.TECHNICAL FIELD

[0002] The present application relates to the technical field of water heater, in particular to a heat exchanger and a gas water heater.BACKGROUND

[0003] A gas water heater is a device that uses gas as fuel and heats cold water passing through a heat exchanger to prepare hot water by burning and releasing heat.

[0004] In related technologies, there is a gap between the heat exchange body and the housing of the heat exchanger in a gas water heater, which easily causes high-temperature gas to be directly discharged without passing through the heat exchange body, resulting in poor heat exchange efficiency and low energy efficiency of the gas water heater.BRIEF DESCRIPTION OF THE DRAWINGS

[0005] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, other drawings can also be obtained based on these drawings without exerting creative efforts.

[0006] FIG. 1 is a structural schematic view of a heat exchanger according to an embodiment of the present application.

[0007] FIG. 2 is a top view of the embodiment of FIG. 1.

[0008] FIG. 3 is a half-section view of the embodiment of FIG. 1.

[0009] FIG. 4 is a structural schematic view of an outer frame according to an embodiment of the present application.

[0010] FIG. 5 is a structural schematic view of a heat exchange body according to an embodiment of the present application.

[0011] FIG. 6 is another perspective schematic view of the embodiment of FIG. 5.

[0012] FIG. 7 is another perspective schematic view of the embodiment of FIG. 5.

[0013] FIG. 8 is an exploded schematic view of part of a second fluid chamber according to an embodiment of the present application.

[0014] FIG. 9 is another perspective view of the embodiment of FIG. 8.

[0015] FIG. 10 is a structural schematic view of a first heat exchange plate according to an embodiment of the present application.

[0016] FIG. 11 is a structural schematic view of a second heat exchange plate according to an embodiment of the present application.DESCRIPTION OF REFERENCE SIGNSreference signnamereference signname100outer frame 211aV-shape concave groove101first fluid inlet212second heat exchangeplate102first fluid outlet 212aV-shaped convex groove103second fluid inlet213first seal plate104second fluid outlet2131 smoke barrier flange110first side wall214second seal plate120second side wall201first flow opening130third side wall202second flow opening140fourth side wall203second fluid inlet111press-type convex bump204second fluid outlet150reinforced pressure profile220smoke barrier structure160installation bracketAsecond fluid channel200heat exchange bodyBfirst fluid chamber210second fluid chamberCinstallation gap211first heat exchange plate

[0017] The realization of the purpose, functional features and advantages of the present application will be further explained in conjunction with embodiments and with reference to the accompanying drawings.DETAILED DESCRIPTION OF EMBODIMENTS

[0018] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work belong to the protection scope of the present application.

[0019] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back . . . ), the directional indication is only configured to explain the relative position relationship, movement, etc. between the components under a specific posture (as shown in the drawings). If the specific posture changes, the directional indication will also change accordingly.

[0020] At the same time, the meaning of “and / or” appearing in the full text is that it includes three solutions. Taking “A and / or B” as an example, it includes A solution, or B solution, or A and B solutions that are satisfied at the same time.

[0021] In addition, if the embodiments of the present application involve descriptions of “first”, “second”, etc., the descriptions of “first”, “second”, etc. are only used for description purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as “first” and “second” may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments may be combined with each other, but they must be based on the fact that they can be implemented by those skilled in the art. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the protection scope required by the present application.

[0022] In the related art, there is an installation gap between the heat exchange body and the housing of the heat exchanger in the gas water heater. When the heat exchange body is a plate heat exchange structure, the heat exchange body includes a plurality of stacked liquid chambers, and a smoke chamber is formed between adjacent liquid chambers. The function of heating the liquid in the liquid chamber is realized by heat exchange between the smoke chamber and the liquid chamber. However, since the plurality of liquid chambers are stacked and the periphery of the smoke chamber is open, the smoke chamber is connected to the installation gap in addition to the smoke inlet and the smoke outlet. It is easy for the smoke in the smoke chamber to flow directly through the installation gap to the smoke outlet for discharge without heat exchange with the liquid chamber, resulting in poor heat exchange efficiency and low energy efficiency of the gas water heater.

[0023] To this end, the present application provides a heat exchanger, which aims to avoid the phenomenon that the smoke flows away without heat exchange, improve the heat exchange efficiency of the gas water heater, and improve the energy efficiency. It can be understood that the heat exchanger can be applied to gas water heaters with full premix combustion, and can also be applied to gas water heaters with atmospheric combustion. For ease of understanding, the following description is made by taking the heat exchanger applied to a gas water heater in a fully premixed combustion form as an example.

[0024] In an embodiment of the present application, as shown in FIGS. 1 to 4, the heat exchanger includes an outer frame 100 and a heat exchange body 200.

[0025] The outer frame 100 is provided with a first side wall 110, a second side wall 120, a third side wall 130 and a fourth side wall 140 which jointly enclose a first fluid inlet 101 and a first fluid outlet 102. The first fluid inlet 101 is for the first fluid to flow in, and the first fluid outlet 102 is for the first fluid to flow out; the first side wall 110 is provided with a second fluid inlet 103 for the second fluid to flow in and a second fluid outlet 104 for the second fluid to flow out, or the first side wall 110 and the third side wall 130 are provided with a second fluid inlet 103 and a second fluid outlet 104 respectively; the first fluid inlet 101 and the first fluid outlet 102 are provided along the first direction; the first side wall 110 and the third side wall 130 are provided oppositely along the second direction, and the second side wall 120 and the fourth side wall 140 are provided oppositely along the third direction; the first direction, the second direction and the third direction intersect each other.

[0026] The heat exchange body 200 is provided in the outer frame 100 and includes a plurality of second fluid chambers 210 provided in a stacked manner. The plurality of second fluid chambers 210 are provided along the second direction and are respectively communicated with the second fluid inlet 103 and the second fluid outlet 104; a first fluid chamber B is formed between two adjacent second fluid chambers 210, and the first fluid chamber B is communicated with the first fluid inlet 101 and the first fluid outlet 102; at least one of the second fluid chambers 210 is provided with a smoke barrier structure 220 at both ends along the third direction, and the smoke barrier structure 220 at least partially covers the gap between the ends of the two adjacent second fluid chambers 210 along the third direction to prevent or reduce the corresponding first fluid chamber B from forming an opening in the third direction.

[0027] It can be understood that the first direction, the second direction and the third direction can be determined according to actual conditions and are not limited to a specific direction combination. For the convenience of description, the first direction is the up-down direction of the outer frame 100, the second direction is the front-back direction of the outer frame 100, and the third direction is the left-right direction of the outer frame 100. The first fluid and the second fluid can be determined according to actual conditions and are not limited to a specific type of fluid, for example, they can be gas or liquid. As an example, the first fluid is a high-temperature gas, which includes at least one of air and fuel gas; the second fluid is a liquid, and the liquid is heated by the high-temperature gas.

[0028] The outer frame 100 serves to provide a flow of the first fluid and to support and install the heat exchange body 200. The first fluid enters the outer frame 100 from the first fluid inlet 101 to exchange heat with the second fluid chamber 210 in the heat exchange body 200, and then flows out from the first fluid outlet 102. In an embodiment, the outer frame 100 includes a first side wall 110, a second side wall 120, a third side wall 130 and a fourth side wall 140 connected end to end; the first side wall 110 and the third side wall 130 are provided oppositely along the second direction, and the second side wall 120 and the fourth side wall 140 are provided oppositely along the third direction. At this time, the four side walls enclose the first fluid inlet 101 and the first fluid outlet 102 that are open in the first direction. The flow direction of the high-temperature gas can be from bottom to top, or from top to bottom, and its specific flow direction can be determined according to the position of the fan and the design of the air duct. That is, the first fluid inlet 101 can be set at the top and the first fluid outlet 102 can be set at the bottom; or, the first fluid inlet 101 can be set at the bottom and the first fluid outlet 102 can be set at the top. In an embodiment, the outer frame 100 is a frame structure with upper and lower openings, and the heat exchange body 200 is set in the inner cavity of the outer frame 100. In an embodiment, for ease of installation, an installation bracket 160 can be set on the outside of the outer frame 100, and fixed in the housing of the water heater through the installation bracket 160. In an embodiment, a reinforced pressure profile 150 can be set on the wall surface of the outer frame 100 to improve the structural strength of the outer frame 100.

[0029] The heat exchange body 200 includes a plurality of second fluid chambers 210 stacked along the second direction. Each second fluid chamber 210 is provided with a second fluid channel A, and a first fluid chamber B is provided between two adjacent second fluid chambers 210, so that the high-temperature gas flowing into the outer frame 100 can flow through the first fluid chamber B and contact the second fluid chamber 210 for heat exchange, heating the liquid in the second fluid channel A in the second fluid chamber 210, and the gas after heat exchange finally flows away from the first fluid outlet 102. In this embodiment, the stacking arrangement direction of the plurality of second fluid chambers 210 is perpendicular to the flow direction of the first fluid. This arrangement can avoid excessive resistance of the high-temperature gas, and at the same time can increase the contact area between the high-temperature gas and the second fluid chamber 210, thereby improving the heating efficiency of the liquid in the second fluid channel A.

[0030] In actual application, after the heat exchange body 200 is installed in the outer frame 100, there is an installation gap C between the heat exchange body 200 and the inner wall of the outer frame 100. The resistance of the installation gap C to the smoke may be smaller than the resistance of the first fluid chamber B between two adjacent second fluid chambers 210 to the smoke. Since the multiple second fluid chambers 210 are stacked along the second direction, the first fluid chamber B between two adjacent second fluid chambers 210 is open at both ends in the third direction, which means that the first fluid chamber B is communicated with the installation gap C. This may cause the high-temperature gas not to exchange heat with the second fluid chamber 210 but directly flow from the two end openings in the third direction to the installation gap C for discharge. Based on this, in this embodiment, a smoke barrier structure 220 is provided at both ends of at least one second fluid chamber 210 along the third direction. The smoke barrier structure 220 can at least partially cover the gap between the ends of two adjacent second fluid chambers 210 along the third direction, that is, at least partially block the opening of the first fluid chamber B in the third direction, reduce or block the high-temperature gas in the first fluid chamber B from flowing into the installation gap C, reduce the high-temperature gas from flowing away from the installation gap C, so that more high-temperature gas exchanges heat with the second fluid chamber 210, thereby improving the heat exchange efficiency.

[0031] It should be noted that, in this embodiment, the smoke barrier structure 220 is provided at both ends of at least one second fluid chamber 210 along the third direction, so that the smoke barrier structure 220 can be provided at the corresponding second fluid chamber 210 outside the outer frame 100; and then multiple second fluid chambers 210 are stacked, so that the smoke barrier structure 220 and the multiple second fluid chambers 210 form an integral component; and then it is assembled into the outer frame 100, so that the smoke barrier structure 220 can achieve the smoke barrier effect and reduce the high-temperature smoke from entering the installation gap C. Compared with the method of setting a smoke barrier structure independent of the heat exchange body 200 in the related art, which requires multiple second fluid chambers 210 to be stacked and then assembled with the smoke barrier structure and the outer frame 100, this embodiment can reduce the difficulty of assembly and improve production efficiency.

[0032] It can be understood that when the smoke barrier structure 220 is located between the ends of two adjacent second fluid chambers 210 along the third direction, it will have a certain smoke barrier effect. The smoke barrier structure 220 can completely or partially block the flow channel of the first fluid chamber B connected to the installation gap C in the third direction. In actual application, the specific structure of the smoke barrier structure 220 can be determined according to actual conditions, for example, it can be a block, a baffle plate, a baffle or some other shapes. In an embodiment, one second fluid chamber 210 can be provided with a smoke barrier structure 220, or two or more second fluid chambers 210 can be provided with a smoke barrier structure 220. In an embodiment, the smoke barrier structure 220 and the second fluid chamber 210 can be an integrally formed structure, or a structure fixed together after being formed separately.

[0033] In summary, in the heat exchanger of the technical solution of the present application, the heat exchange body 200 is provided in the outer frame 100, and the heat exchange body 200 includes a plurality of second fluid chambers 210 stacked along the second direction. A second fluid channel A is provided in the second fluid chamber 210, and a first fluid chamber B is provided between two adjacent second fluid chambers 210, so that the high-temperature gas entering the outer frame 100 from the first fluid inlet 101 can flow through the first fluid chamber B and contact with the second fluid chamber 210 for heat exchange, thereby realizing the function of heating the liquid in the second fluid channel A in the second fluid chamber 210. At the same time, there is an installation gap C between the two ends of the heat exchange body 200 along the third direction and the inner wall of the outer frame 100. By setting a smoke barrier structure 220 at both ends of at least one second fluid chamber 210 along the third direction, the smoke barrier structure 220 can at least partially cover the gap between the ends of two adjacent second fluid chambers 210 along the third direction; that is, the channel of the first fluid chamber B connected to the installation gap C in the third direction is at least partially blocked, so as to reduce or block the high-temperature gas in the first fluid chamber B from flowing into the installation gap C, and prevent the high-temperature gas from flowing away from the installation gap C, so that more high-temperature gas exchanges heat with the second fluid chamber 210, thereby improving the heat exchange efficiency. In addition, by directly setting the smoke barrier structure 220 on the side wall of the second fluid chamber 210, when the heat exchange body 200 is installed in the outer frame 100, the smoke barrier structure 220 can directly play a smoke blocking role, thereby simplifying the assembly difficulty and improving the assembly efficiency.

[0034] In an embodiment of the present application, as shown in FIGS. 1, 2, 3 and 5, each second fluid chamber 210 is provided with a smoke barrier structure 220 at both ends along the third direction; multiple smoke barrier structures 220 are provided in layers in the second direction.

[0035] In this embodiment, by providing smoke barrier structures 220 at both ends of each second fluid chamber 210 along the third direction, when multiple second fluid chambers 210 are stacked, the corresponding multiple smoke barrier structures 220 are also provided in layers, which increases the blocking area for high-temperature gas, increases the airflow resistance, and effectively prevents high-temperature gas from flowing away from the installation gap C. It should be noted that the multiple smoke barrier structures 220 provided in layers can be multiple smoke barrier structures 220 provided in layers along the second direction, or multiple smoke barrier structures 220 can be provided at intervals in layers along the second direction.

[0036] It can be understood that each second fluid chamber 210 is provided with a smoke barrier structure 220. When multiple second fluid chambers 210 are stacked and assembled outside the outer frame 100, multiple smoke barrier structures 220 can be driven to be assembled together at the same time, and then assembled into the outer frame 100 as a whole, which effectively reduces the difficulty of assembly.

[0037] Further, the smoke barrier structure 220 and the corresponding second fluid chamber 210 are an integrally formed structure.

[0038] Such a configuration enables the smoke barrier structure 220 to be manufactured together when the second fluid chamber 210 is manufactured, eliminating the assembly steps of the smoke barrier structure 220 and the second fluid chamber 210. At the same time, when multiple second fluid chambers 210 are assembled, the smoke barrier structure 220 can be driven to be assembled together, thereby eliminating the need to set up a separate smoke barrier structure, simplifying the assembly steps and improving the assembly efficiency.

[0039] In an embodiment, the smoke barrier structure 220 and the second fluid chamber 210 can be integrally formed by a mold.

[0040] Further, the second fluid chamber 210 is bent at both ends along the third direction to form the smoke barrier structure 220. In an embodiment, the smoke barrier structure 220 is a flange structure formed at both ends of the second fluid chamber 210; the flange structure is extended from the second fluid chamber 210 in the second direction.

[0041] In this embodiment, the smoke barrier structure 220 is formed by bending the edges of both ends of the second fluid chamber 210, which simplifies the molding process and improves production efficiency. By bending and extending the smoke barrier structure 220 along the second direction, the blocking area of the high-temperature gas in the first fluid chamber B can be increased, and the high-temperature gas flowing into the installation gap C can be further reduced. In an embodiment, the smoke barrier structure 220 is at least surrounded at both ends of the second fluid chamber 210 along the third direction, so as to form a limiting groove structure for the adjacent second fluid chamber 210, ensuring a better limiting effect.

[0042] Further, as shown in FIGS. 5 and 6, the bending length of the smoke barrier structure 220 in the second direction is not less than the gap between the ends of the two adjacent second fluid chambers 210 along the third direction.

[0043] Such a design enables the gaps between the ends of two adjacent second fluid chambers 210 along the third direction to be blocked by the smoke barrier structure 220, that is, the first fluid chamber B between the two adjacent second fluid chambers 210 will not be communicated with the installation gap C, so that the high-temperature gas in the first fluid chamber B will not flow away from the installation gap C, but can only flow out from the first fluid outlet 102 after heat exchange with the second fluid chamber 210.

[0044] In an embodiment, the end of the smoke barrier structure 220 in the first direction is bent along the third direction to partially block the first fluid inlet 101.

[0045] With such a design, the smoke barrier structure 220 can cover the edges of both ends of the second fluid chamber 210 along the third direction, and can extend partly to the side of the second fluid chamber 210 facing the first fluid inlet 101, so that the first fluid chamber B can be prevented from being communicated with the installation gap C, and the first fluid inlet 101 can be prevented from being communicated with the installation gap C, thereby preventing high-temperature smoke from entering the installation gap C to achieve a better smoke blocking effect.

[0046] In an embodiment, the end of the smoke barrier structure 220 in the first direction is bent along the third direction to partially block the first fluid outlet 102. In this way, the conduction area between the installation gap C and the first fluid outlet 102 can be reduced, and the high-temperature gas can be further reduced from flowing away without heat exchange.

[0047] In addition, by bending the smoke barrier structure 220 to the first fluid inlet 101 and the first fluid outlet 102, compared with the way that the smoke barrier structure 220 only extends along the first direction, the structural strength can be further improved and the structural reliability can be ensured.

[0048] In order to further improve the smoke blocking effect, In an embodiment of the present application, as shown in FIGS. 1 and 2, the smoke barrier structure 220 abuts against the corresponding second side wall 120 or the fourth side wall 140.

[0049] In this embodiment, one end of the smoke barrier structure 220 is connected to the second fluid chamber 210, and the other end abuts against the inner wall surface of the outer frame 100, so that the smoke barrier structure 220 can reduce the flow area of the installation gap C in the third direction, thereby increasing the airflow resistance.

[0050] In an embodiment of the present application, as shown in FIGS. 3, 8 to 11, the second fluid chamber 210 includes a first heat exchange plate 211 and a second heat exchange plate 212 enclosing and forming a second fluid channel A, and the first heat exchange plate 211 and the second heat exchange plate 212 are provided along the second direction; the first heat exchange plate 211 and / or the second heat exchange plate 212 are bent at the end along the third direction to form a smoke barrier structure 220.

[0051] This embodiment illustrates the structure of the second fluid chamber 210 by way of example, and the second heat exchange plate 212 is provided at the first heat exchange plate 211. It can be understood that the periphery of the first heat exchange plate 211 and the second heat exchange plate 212 are fixedly sealed and connected, and the middle positions of the first heat exchange plate 211 and the second heat exchange plate 212 are spaced apart, so that a second fluid channel A is formed between the two. In an embodiment, the first heat exchange plate 211 and the second heat exchange plate 212 are fixed by brazing.

[0052] In practical application, the smoke barrier structure 220 may be provided at the side of the first heat exchange plate 211, or at the side wall of the second heat exchange plate 212, or at the sides of both the first heat exchange plate 211 and the second heat exchange plate 212.

[0053] In an embodiment, the first heat exchange plate 211 is provided with two first flow openings 201 on both sides of the third direction; the second heat exchange plate 212 is provided with two second flow openings 202 corresponding to the two first flow openings 201, and the two second flow openings 202 and the two first flow openings 201 are communicated with the second fluid channel A;

[0054] In two adjacent second fluid chambers 210, the first flow openings 201 on the adjacent first heat exchange plate 211 are connected to the second flow openings 202 on the second heat exchange plate 212, so that the two adjacent second fluid chambers 210 are connected in parallel.

[0055] It can be understood that the two first flow openings 201 of the first heat exchange plate 211 can be used as the inlet or outlet of the second fluid, and the two second flow openings 202 of the second heat exchange plate 212 can be used as the outlet or inlet of the second fluid.

[0056] When multiple second fluid chambers 210 are stacked, the first flow openings 201 of the adjacent first heat exchange plate 211 can be communicated with the second flow openings 202 of the second heat exchange plate 212, so that the second fluid channels A in the two adjacent second fluid chambers 210 are communicated, thereby realizing the function of communicating multiple second fluid channels A in multiple second fluid chambers 210 in parallel.

[0057] In order to further improve the heat exchange efficiency, the first flow opening 201 and the second flow opening 202 located on the same side of the two adjacent second fluid chambers 210 are connected to each other, so that the second fluid channels A of the two adjacent second fluid chambers 210 are connected in parallel, so that the second fluid entering from the second fluid inlet 203 can be diverted to the second fluid channels A of each second fluid chamber 210 and exchange heat with the flue gas in the first fluid chamber B at the same time, and then flow out from each second fluid channel A and converge, and finally flow out of the heat exchanger from the second fluid outlet 204.

[0058] In an embodiment, the two first flow openings 201 are respectively provided at the diagonal positions of the first heat exchange plate 211, and the two second flow openings 202 are respectively provided at the diagonal positions of the second heat exchange plate 212. In this way, the path of the second fluid channel A can be further extended to improve the heat exchange efficiency.

[0059] In order to further improve the heat exchange efficiency, a plurality of concave and convex structures are provided at the first heat exchange plate 211 and / or the second heat exchange plate 212.

[0060] Such a design can reduce the speed of the second fluid on the one hand, so that the second fluid can stay in the second fluid chamber 210 for a longer time, and on the other hand, it can increase the contact area between the heat exchange plate and the high-temperature gas, increase the heat exchange area, and improve the heat exchange efficiency.

[0061] As an example, as shown in FIGS. 8, 10 and 11, the first heat exchange plate 211 is provided with a V-shape concave groove 211a that is concave and provided side by side away from the second heat exchange plate 212, and the second heat exchange plate 212 is provided with a V-shaped convex groove 212a that is convex and provided side by side away from the first heat exchange plate 211. The V-shaped convex groove 212a is opposite to the V-shape concave groove 211a and is provided in the opposite direction.

[0062] In this embodiment, the V-shape concave groove or convex groove is provided, which can reduce the difficulty of molding and improve production efficiency compared with other irregular concave and convex structures. It can be understood that the V-shaped convex groove 212a and the V-shape concave groove 211a are opposite and provided in the opposite direction, so that the second fluid channel A is formed between the inner wall of the V-shape concave groove 211a and the inner wall of the V-shaped convex groove 212a in the same second fluid chamber 210, and the outer wall of the V-shape concave groove 211a of the first heat exchange plate 211 in two adjacent second fluid chambers 210 abuts against the outer wall of the V-shaped convex groove 212a of the adjacent second heat exchange plate 212 to form a first fluid chamber B.

[0063] It can be understood that the number of second fluid chambers 210 in the heat exchanger can be determined according to actual conditions, for example, it can be 4, 6, 8, 10, 16, etc.

[0064] In an embodiment of the present application, as shown in FIGS. 1, 2, 5 and 7, the heat exchange body 200 further includes a first seal plate 213 and a second seal plate 214, which are respectively provided at both sides of the plurality of second fluid chambers 210 in the second direction, and are used to clamp and fix the plurality of second fluid chambers 210; the first seal plate 213 is fitted and connected to the first side wall 110, and the second seal plate 214 is fitted and connected to the third side wall 130; the first seal plate 213 is provided with a second fluid inlet 203 and a second fluid outlet 204; the second fluid inlet 203 connects the second fluid chamber 210 with the second fluid inlet 103; the second fluid outlet 204 connects the second fluid chamber 210 with the second fluid outlet 104.

[0065] In this embodiment, the first seal plate 213 and the second seal plate 214 are respectively provided at both ends of the plurality of second fluid chambers 210 in the stacking direction, and the plurality of second fluid chambers 210 are clamped and fixed, so that the first seal plate 213, the plurality of second fluid chambers 210 and the second seal plate 214 are assembled to form an integral structure. In an embodiment, the first seal plate 213 is welded and fixed to the adjacent second fluid chamber 210; the first seal plate 213 is welded and fixed to the first side wall 110. In an embodiment, the second seal plate 214 is welded and fixed to the adjacent second fluid chamber 210; the second seal plate 214 is welded and fixed to the third side wall 130.

[0066] It can be understood that each second fluid chamber 210 is provided with a second fluid channel A, and the second fluid channels A of adjacent second fluid chambers 210 can be connected through the flow opening; the first seal plate 213 and the second seal plate 214 are respectively provided at the front and rear sides of the plurality of second fluid chambers 210; the flow opening of the second fluid chamber 210 adjacent thereto can be blocked by the second seal plate 214, so that the second fluid inlet 203 and the second fluid outlet 204 of the second fluid channel A are both located on the first seal plate 213, so that the water entering from the second fluid inlet 203 can flow through the second fluid channels A in the plurality of second fluid chambers 210 for heat exchange before flowing out from the second fluid outlet 204, so as to ensure the function of heating the second fluid.

[0067] In an embodiment, the second seal plate 214 is a flat plate structure. One end of the second seal plate 214 is fitted and connected to the inner wall surface of the third side wall 130, and the other end of the second seal plate 214 is connected to the adjacent second fluid chamber 210.

[0068] In an embodiment, the first seal plate 213 may also be a flat plate structure or other structure. One end of the first seal plate 213 is connected to the inner wall surface of the first side wall 110, and the other end of the first seal plate 213 is connected to the adjacent second fluid chamber 210. The second fluid inlet 203 and the second fluid outlet 204 are respectively connected to the corresponding flow openings.

[0069] In practical applications, in order to facilitate the installation of the heat exchange body into the outer frame 100, the radial dimension of the installation cavity of the outer frame 100 may be set to be larger than the dimension of the heat exchange body 200. It can be understood that the front and rear width dimensions of the outer frame 100 are larger than the front and rear width dimensions of the heat exchange body 200, and the left and right width dimensions of the outer frame 100 are larger than the left and right width dimensions of the heat exchange body 200. In this embodiment, a smoke barrier structure 220 is set on the left and right sides of the second fluid chamber 210, which can prevent the airflow from entering the installation gap C on the left and right sides. In the front-to-back direction, the second seal plate 214 is fitted and connected to the third side wall 130. By setting smoke barrier flanges 2131 extending toward the first side wall 110 on both sides of the first seal plate 213 in the third direction, the smoke barrier flanges 2131 abut against the first side wall 110, which can prevent smoke from flowing from the gap between the first seal plate 213 and the first side wall 110 to the installation gap C; at the same time, the first side wall 110 is provided with a press-type convex bump 111 protruding toward the first seal plate 213, and the press-type convex bump 111 is fitted with the first seal plate 213, which can achieve the blocking of the gap between the first seal plate 213 and the first side wall 110, and prevent smoke from flowing away from the gap between the first seal plate 213 and the first side wall 110. Thus, a better smoke-blocking effect is achieved.

[0070] In addition, the press-type convex bump 111 on the first side wall 110 can also limit the heat exchange body 200, further improving the installation reliability of the heat exchange body 200 and the outer frame 100. In an embodiment, the press-type convex bump 111 and the first seal plate 213 are fixed by brazing. At the same time, the pressing of the first side wall 110 can save the setting of a smoke barrier structure 220, further reducing the difficulty of processing.

[0071] The present application also provides a gas water heater, which includes a heat exchanger. The specific structure of the heat exchanger refers to the above embodiment. Since the gas water heater adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0072] The above description is only some embodiments of the present application, and does not limit the patent scope of the present application. All equivalent structural changes made by using the contents of the present application specification and drawings under the inventive concept of the present application, or directly / indirectly applied in other related technical fields, are included in the patent scope of the present application.

Claims

1. A heat exchanger, comprising:an outer frame, provided with a first side wall, a second side wall, a third side wall and a fourth side wall; the first side wall, the second side wall, the third side wall and the fourth side wall jointly enclosing a first fluid inlet and a first fluid outlet; wherein the first fluid inlet is configured for a first fluid to flow in, and the first fluid outlet is configured for the first fluid to flow out;wherein the first side wall is provided with a second fluid inlet for a second fluid to flow in and a second fluid outlet for the second fluid to flow out; orthe first side wall and the third side wall are provided with the second fluid inlet and the second fluid outlet respectively;wherein the first fluid inlet and the first fluid outlet are provided along a first direction; the first side wall and the third side wall are provided opposite to each other along a second direction; the second side wall and the fourth side wall are provided opposite to each other along a third direction; the first direction, the second direction, and the third direction are intersected with each other in pairs; anda heat exchange body, provided in the outer frame and having a plurality of second fluid chambers provided in a layered manner; wherein the plurality of second fluid chambers are provided along the second direction and respectively communicates with the second fluid inlet and the second fluid outlet; wherein a first fluid chamber is formed between two adjacent ones of the second fluid chambers, and the first fluid chamber communicates with the first fluid inlet and the first fluid outlet; wherein at least one of the second fluid chambers is provided with a smoke barrier structure at both ends thereof along the third direction, wherein the smoke barrier structure at least partially covers a gap between the ends of the two adjacent ones of the second fluid chambers along the third direction, to prevent or restrain the first fluid chamber from forming an opening in the third direction.

2. The heat exchanger according to claim 1, wherein the first fluid is a high-temperature gas; andwherein the gas comprises at least one of air and fuel gas, and wherein the second fluid is a liquid.

3. The heat exchanger according to claim 1, wherein each of the second fluid chambers is provided with the smoke barrier structure at both ends thereof along the third direction; andwherein a plurality of the smoke barrier structures are provided in layers in the second direction.

4. The heat exchanger according to claim 1, wherein the smoke barrier structure is integrally formed with a corresponding one of the second fluid chambers.

5. The heat exchanger according to claim 4, wherein the second fluid chamber bend at both ends thereof along the third direction to form the smoke barrier structure.

6. The heat exchanger according to claim 5, wherein a bending direction of the smoke barrier structure is the second direction.

7. The heat exchanger according to claim 6, wherein a bending length of the smoke barrier structure in the second direction is not less than a gap between the ends of two adjacent ones of the second fluid chambers along the third direction.

8. The heat exchanger according to claim 1, wherein the smoke barrier structure blocks the gap between the ends of two adjacent ones of the second fluid chambers along the third direction.

9. The heat exchanger according to claim 8, wherein an end of the smoke barrier structure in the first direction is bent along the third direction to partially block the first fluid inlet and / or the first fluid outlet.

10. The heat exchanger according to claim 1, wherein the second fluid chamber comprises a first heat exchange plate and a second heat exchange plate enclosing and forming a second fluid channel, and wherein the first heat exchange plate and the second heat exchange plate are provided along the second direction; andwherein the first heat exchange plate and / or the second heat exchange plate are provided with the smoke barrier structure at an end along the third direction.

11. The heat exchanger according to claim 10, wherein the first heat exchange plate is provided with two first flow openings on both sides of the third direction;wherein the second heat exchange plate is provided with two second flow openings corresponding to the two first flow openings, and wherein the two second flow openings and the two first flow openings are communicated with the second fluid channel; andwherein in two adjacent second fluid chambers, the first flow openings on the adjacent first heat exchange plate are connected to the second flow openings on the second heat exchange plate, to make the adjacent two second fluid chambers be connected in parallel.

12. The heat exchanger according to claim 11, wherein the first heat exchange plate and / or the second heat exchange plate are provided with a plurality of concave and convex structures.

13. The heat exchanger according to claim 12, wherein the first heat exchange plate is provided with a V-shape concave groove concavely provided away from the second heat exchange plate and provided side by side, and wherein the second heat exchange plate is provided with a V-shaped convex groove convexly provided away from the first heat exchange plate and provided side by side; andwherein the V-shaped convex groove is opposite to the V-shape concave groove and is provided in an opposite direction.

14. The heat exchanger according to claim 1, wherein the smoke barrier structure is abutted against a corresponding second side wall or a corresponding fourth side wall.

15. The heat exchanger according to claim 1, wherein the heat exchange body further comprises a first seal plate and a second seal plate, and wherein the first seal plate and the second seal plate are respectively provided at both sides of the plurality of second fluid chambers in the second direction;wherein the first seal plate is fitted and connected to the first side wall, and wherein the second seal plate is fitted and connected to the third side wall;wherein the first seal plate is provided with a second fluid inlet and a second fluid outlet; andwherein the second fluid inlet is communicated with the second fluid chamber and the second fluid inlet, and wherein the second fluid outlet is communicated with the second fluid chamber and the second fluid outlet.

16. The heat exchanger according to claim 15, wherein two ends of the first seal plate along the third direction are provided with smoke barrier flanges extending toward the first side wall, and wherein the smoke barrier flanges are abutted against the first side wall; andwherein the first side wall is provided with a press-type convex bump protruding toward the first seal plate, and wherein the press-type convex bump is provided in contact with the first seal plate.

17. A gas water heater, comprising the heat exchanger according to claim 1.

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