Heat exchanger and gas water heater

Abstract

The invention relates to the technical field of gas water heaters, and discloses a heat exchanger and a gas water heater, the heat exchanger comprises a heat exchange tube and a heat exchange sheet, the heat exchange tube is provided with a water inlet and a water outlet, the heat exchange tube is bent to form at least two bent spaces, the heat exchange sheet and the at least two bent spaces are arranged in a one-to-one correspondence mode, the heat exchange sheet comprises a plurality of heat exchange fins, and the heat exchange fins are arranged in the bent spaces. The multiple heat exchange fins are arranged at intervals in the length direction of the bending space. Due to the fact that the heat exchange pieces are independently installed in the corresponding bending spaces, when local even large-area carbon deposition and oxidation corrosion occur to the heat exchange pieces in part of the bending spaces, the corresponding heat exchange pieces can be taken out of the bending spaces to be replaced, and the heat exchange pieces in other bending spaces can be continuously used. Therefore, local replacement and maintenance of the heat exchanger are achieved, the whole heat exchanger does not need to be scrapped, material resources and replacement cost are saved, the service life of the heat exchanger is prolonged, meanwhile, the heat exchange pieces do not need to be perforated and penetrated, the manufacturing procedures of the heat exchange pieces are greatly reduced, and after-sales maintenance is convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of gas water heaters, and particularly to a heat exchanger and a gas water heater. Background Art

[0002] For the heat exchanger used on a gas water heater, multiple fins are perforated and sleeved on a heat exchange tube by welding. When some fins have local or even large-area carbon deposition and oxidation corrosion, the heat exchange efficiency of the heat exchanger will be greatly reduced, resulting in insufficient hot water temperature exchanged by the gas water heater, affecting the normal use of users. At this time, the conventional method can only replace the entire heat exchanger, causing a great waste of material resources. Summary of the Invention

[0003] In view of this, the present invention provides a heat exchanger and a gas water heater to solve the problem that when some fins of the existing heat exchanger have local or even large-area carbon deposition and oxidation corrosion, only the entire heat exchanger can be replaced, resulting in a great waste of material resources.

[0004] The first aspect of the present invention provides a heat exchanger, including a heat exchange tube and heat exchange fins. The heat exchange tube has a water inlet and a water outlet. The heat exchange tube is bent to form at least two bending spaces. The heat exchange fins and at least two of the bending spaces are arranged in one-to-one correspondence. The heat exchange fins include a plurality of heat exchange fins, and the plurality of heat exchange fins are arranged at intervals along the length direction of the bending space.

[0005] Beneficial Effects: For the heat exchanger of the present application, at least two bending spaces are formed by bending the heat exchange tube. The heat exchange fins are arranged in one-to-one correspondence with the bending spaces. The plurality of heat exchange fins of the heat exchange fins are arranged at intervals along the length direction of the bending space. During heat exchange, cold water flows into the heat exchange tube from the water inlet and exchanges heat with the plurality of heat exchange fins. The hot water formed by heat exchange flows out of the heat exchange tube from the water outlet. Since the heat exchange fins are independently installed in the corresponding bending spaces, when some of the heat exchange fins in the bending spaces have local or even large-area carbon deposition and oxidation corrosion, the corresponding heat exchange fins can be taken out from the bending spaces for replacement, and the heat exchange fins in other bending spaces can continue to be used, so as to realize local replacement and repair of the heat exchanger, without scrapping the entire heat exchanger, saving material resources, replacement costs and extending the service life of the heat exchanger. At the same time, the heat exchange fins do not need to be perforated and sleeved with tubes anymore, greatly reducing the manufacturing process of the heat exchange fins, and facilitating after-sales maintenance.

[0006] In some embodiments, the heat exchange tube includes a first bent portion and a second bent portion. There are at least two first bent portions, and at least two first bent portions are arranged in parallel at intervals along the length direction of the bending space. The second bent portion is arranged between two adjacent first bent portions. An included angle is formed between the second bent portion and the first bent portion, and the bending space is formed between the second bent portion and the two adjacent first bent portions.

[0007] Beneficial effects: When the heat exchange tube is bent, a first bent portion and a second bent portion are formed. The number of first bent portions determines the number of formed bending spaces. The second bent portion connects two adjacent first bent portions to ensure the overall structural stability and defines the width of the bending space.

[0008] In some embodiments, the distance between any two adjacent first bent portions is equal.

[0009] Beneficial effects: By making the distance between any two adjacent first bent portions equal, the formed bending spaces are consistent, improving the heat exchange uniformity of water at various parts inside the heat exchange tube and avoiding the situation of uneven heat exchange effect caused by inconsistent bending spaces.

[0010] In some embodiments, the heat exchange tube is a flat tube, and the thickness h1 of the heat exchange tube satisfies: 10mm ≤ h1 ≤ 20mm.

[0011] Beneficial effects: By setting the thickness h1 of the heat exchange tube between 10mm and 20mm, not only can the water and heat exchange fins inside the heat exchange tube have a good heat exchange effect and reach the heat exchange temperature, but also the water flow rate can be taken into account. It can avoid the situation that the water inside the heat exchange tube cannot be heated to a suitable temperature due to too large a thickness h1 of the heat exchange tube, and too small a thickness h1 of the heat exchange tube will lead to too small a water flow rate, affecting the water output.

[0012] In some embodiments, the height h2 of the heat exchange tube and the thickness h1 of the heat exchange tube satisfy:

[0013] Beneficial effects: By setting the relationship between the height h2 of the heat exchange tube and the thickness h1 of the heat exchange tube to satisfy, Both the heat exchange effect and the water flow rate of the heat exchange tube are taken into account. It can avoid the situation that the water flow inside the heat exchange tube is too much to be heated to a suitable temperature due to too large a height h2 of the heat exchange tube, and too small a height h2 of the heat exchange tube will lead to too small a water flow rate, affecting the water output.

[0014] In some embodiments, the width L1 of the heat exchange tube and the height h2 of the heat exchange tube satisfy:

[0015] Beneficial effects: By setting the width L1 of the heat exchange tube and the height h2 of the heat exchange tube to satisfy there is a dimensional design correlation between the width and height of the heat exchange tube, avoiding the situation that the difference between the two dimensions is too large and affecting the heat exchange efficiency.

[0016] In some embodiments, the length L2 of the heat exchange tube and the width L1 of the heat exchange tube satisfy:

[0017] Beneficial effects: By setting the length L2 of the heat exchange tube and the width L1 of the heat exchange tube to satisfy there is a dimensional design correlation between the length and width of the heat exchange tube, avoiding the situation that the difference between the two dimensions is too large and affecting the heat exchange efficiency.

[0018] In some embodiments, a plurality of the heat exchange fins are integrally folded from the heat exchange sheet, and adjacent two of the heat exchange fins are connected by a folding portion.

[0019] Beneficial effects: By the way that a plurality of heat exchange fins are integrally folded from the heat exchange sheet, the plurality of heat exchange fins are integrally manufactured and formed, with better structural integrity, convenient manufacturing and installation. When installing, the heat exchange sheet can be integrally installed into the bending space, without manufacturing and installing the plurality of heat exchange fins one by one, improving the manufacturing and installation efficiency, and more convenient for after-sales maintenance.

[0020] In some embodiments, the distance between any adjacent two of the heat exchange fins is equal.

[0021] Beneficial effects: By setting the distance between any adjacent two heat exchange fins to be equal, the plurality of heat exchange fins in the bending space are evenly distributed, enabling them to exchange heat evenly with the heat exchange tube and enhancing the heat exchange uniformity of the heat exchanger.

[0022] In some embodiments, the height L3 and the width L4 of the heat exchange fin are equal, and satisfy with the distance L5 between adjacent two of the heat exchange fins: L3 = L4 = 10×L5.

[0023] Beneficial effects: By setting the relationship between the height, width of the heat exchange fin and the distance between the heat exchange fins, the heat exchange sheet reaches the state with the best heat exchange efficiency under the same volume and weight.

[0024] In some embodiments, the heat exchanger further includes a limiting portion, the limiting portion is connected to the heat exchange tube, the limiting portion is located in the bending space, and the limiting portion is arranged at the bottom of the heat exchange fin.

[0025] Beneficial effects: The provided limiting part is located at the bottom of the heat exchange fins, which can limit and fix the position of the heat exchange fins, enhancing the connection stability between the heat exchange fins and the heat exchange tubes.

[0026] In some embodiments, one side of the outermost heat exchange fin away from the folding part has a hem, and the hem is connected to the heat exchange tube, and the hem forms an angle with the outermost heat exchange fin.

[0027] Beneficial effects: The provided hem can be connected to the heat exchange tube to enhance the connection strength of the outermost heat exchange fin and reduce the situation of the outermost heat exchange fin falling off from the heat exchange tube.

[0028] In some embodiments, one side of the hem away from the outermost heat exchange fin abuts against the inner heat exchange fin.

[0029] Beneficial effects: Making one side of the hem away from the outermost heat exchange fin abut against the inner heat exchange fin can prevent the outermost heat exchange fin from deforming inward due to force during the installation process, enhancing the overall anti-deformation ability of the heat exchange tube, reducing the deformation occurring during the installation process, and facilitating the installation of the heat exchange tube.

[0030] The second aspect of the present invention provides a gas water heater, including the heat exchanger of the present invention.

[0031] Beneficial effects: Since the gas water heater of the present invention includes the heat exchanger of the present invention, the gas water heater of the present invention has the same technical effects as the heat exchanger of the present invention. For details, please refer to the above description and will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0033] Figure 1 Schematic perspective view of the heat exchanger according to an embodiment of the present invention;

[0034] Figure 2 Top view of the heat exchanger according to an embodiment of the present invention;

[0035] Figure 3 Front view of the heat exchanger according to an embodiment of the present invention;

[0036] Figure 4 For Figure 3 Cross-sectional view taken along line A-A in

[0037] Figure 5 Schematic exploded view of a heat exchanger according to an embodiment of the present invention;

[0038] Figure 6 Schematic perspective view of a heat exchange fin according to an embodiment of the present invention;

[0039] Figure 7 Top view of a heat exchange fin according to an embodiment of the present invention;

[0040] Figure 8 Front view of a heat exchange fin according to an embodiment of the present invention.

[0041] Explanation of reference numerals

[0042] 1. Heat exchange tube; 11. First bent portion; 111. Water inlet; 112. Water outlet; 113. Flange; 12. Second bent portion; 13. Bent space; 14. Plug;

[0043] 2. Heat exchange fin; 21. Heat exchange fins; 22. Folded portion; 23. Hem;

[0044] 3. Limiting portion;

[0045] 4. Water inlet pipe; 41. First connecting section;

[0046] 5. Water outlet pipe; 51. Second connecting section. Detailed implementation manners

[0047] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0048] In the description of the present invention, it should be noted that the orientation or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "first", "second", "third", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 construed as limiting the present invention.

[0049] In the description of the present invention, it should be noted that, unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" 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 an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0051] Related art: In the existing heat exchanger, holes are formed in the middle of the heat exchange fins 2. A plurality of heat exchange fins 2 are sleeved on the outer periphery of the heat exchange tube 1 at intervals through the holes and are welded and fixed to the heat exchange tube 1. When local or even large-area carbon deposition and oxidation corrosion occur in the heat exchange fins 2 in the middle, if it is necessary to replace this part of the heat exchange fins 2, it is necessary to first remove other intact heat exchange fins 2 to achieve this. The entire replacement process is complex and very inconvenient. Therefore, the usual practice is to replace the entire heat exchanger, resulting in a great waste of material resources. Based on this, the present application proposes a heat exchanger that can facilitate the replacement of the heat exchange fins 2 without scrapping the entire heat exchanger.

[0052] The following will be combined with Figures 1 to 8 , and the embodiments of the present invention will be described in detail.

[0053] As Figures 1 to 4 shown, according to an embodiment of the present invention, on the one hand, a heat exchanger is disclosed, which includes a heat exchange tube 1 and heat exchange fins 2. Among them, the heat exchange tube 1 has a water inlet 111 and a water outlet 112. The heat exchange tube 1 is bent to form at least two bending spaces 13. The heat exchange fins 2 are arranged in one-to-one correspondence with at least two bending spaces 13. The heat exchange fins 2 include a plurality of heat exchange fins 21, and the plurality of heat exchange fins 21 are arranged at intervals along the length direction of the bending space 13.

[0054] The heat exchanger of the present application forms at least two bending spaces 13 by bending the heat exchange tubes 1. The heat exchange fins 2 are correspondingly arranged in the bending spaces 13 one by one. A plurality of heat exchange fins 21 of the heat exchange fins 2 are arranged at intervals along the length direction of the bending spaces 13. During heat exchange, cold water flows into the heat exchange tubes 1 from the water inlet 111 and exchanges heat with the plurality of heat exchange fins 21. The hot water formed by heat exchange flows out of the heat exchange tubes 1 from the water outlet 112. Since the heat exchange fins 2 are independently installed in the corresponding bending spaces 13, when the heat exchange fins 2 in some of the bending spaces 13 are locally or even largely carbonized and oxidized and corroded, the corresponding heat exchange fins 2 can be taken out from the bending spaces 13 and replaced. The heat exchange fins 2 in the other bending spaces 13 can continue to be used, so as to realize the local replacement and repair of the heat exchanger, without scrapping the whole heat exchanger, saving material resources, replacement costs and prolonging the service life of the heat exchanger. At the same time, the heat exchange fins 2 do not need to be perforated and piped anymore, greatly reducing the manufacturing process of the heat exchange fins 2 and facilitating after-sales maintenance.

[0055] At the same time, compared with the existing heat exchange tubes 1 arranged straight and at intervals, the present application bends the heat exchange tubes 1, which can reduce the space occupied by the heat exchange tubes 1 in the length direction of the heat exchanger, and increase the heat exchange area of the heat exchange tubes 1 through bending, so as to achieve the best heat exchange effect in a limited space.

[0056] The present application does not limit the number of the heat exchange tubes 1, and the heat exchange tubes 1 can be set to one or more according to requirements to realize heat exchange of different water flows and meet different water use requirements.

[0057] In some embodiments, as Figure 1 、 Figure 2 and Figure 4 shown, the heat exchange tube 1 includes a first bending portion 11 and a second bending portion 12. Among them, at least two first bending portions 11 are provided, and at least two first bending portions 11 are arranged in parallel at intervals along the width direction of the bending space 13. The second bending portion 12 is arranged between two adjacent first bending portions 11. An included angle is formed between the second bending portion 12 and the first bending portion 11, and a bending space 13 is formed between the second bending portion 12 and the two adjacent first bending portions 11.

[0058] When the heat exchange tube 1 is bent, the first bending portion 11 and the second bending portion 12 are formed. The number of the first bending portions 11 limits the number of the formed bending spaces 13. The second bending portion 12 realizes the connection of two adjacent first bending portions 11, ensures the overall structural stability, and limits the width of the bending space 13.

[0059] It can be understood that the heat exchange tube 1 forms two first bending portions 11 and one second bending portion 12 each time it is bent twice, and a bending space 13 is formed between the two first bending portions 11 and the one second bending portion 12. In this embodiment, the heat exchange tube 1 is bent multiple times to form five first bending portions 11 and four second bending portions 12, and the five first bending portions 11 and the four second bending portions 12 cooperate to form four bending spaces 13, and a heat exchange plate 2 is correspondingly arranged in each bending space 13. Of course, in other embodiments, the heat exchange tube 1 can be bent to form other numbers of first bending portions 11 and second bending portions 12 as needed, and cooperate to form a corresponding number of bending spaces 13, which is not limited to this embodiment.

[0060] Specifically, the heat exchange tube 1 is preferably made of a copper tube or a stainless steel tube with a wall thickness of 0.5 mm to 0.8 mm, so that it has a better heat transfer effect.

[0061] In some embodiments, the distances between any two adjacent first bending portions 11 are equal.

[0062] By making the distance between any two adjacent first bending portions 11 equal, the formed bending spaces 13 are made consistent, thereby improving the uniformity of heat exchange of water at various locations in the heat exchange tube 1 and avoiding the situation where the heat exchange effect is uneven due to inconsistent bending spaces 13.

[0063] In detail, the spacing between any two adjacent first bending portions 11 is equal, and the height of the heat exchange tube 1 is constant, that is, the width, length, and height of each bending space 13 formed are the same, ensuring that the heat exchange effect at various locations of the heat exchange tube 1 is consistent, avoiding uneven heat exchange at various locations due to different sizes of the bending spaces 13.

[0064] like Figure 4 As shown, in some embodiments, the heat exchange tube 1 is a flat tube, and the thickness h1 of the heat exchange tube 1 is: 10 mm≤h1≤20 mm.

[0065] By setting the thickness h1 of the heat exchange tube 1 to 10 mm to 20 mm, the water in the heat exchange tube 1 and the heat exchange plate 2 can have a good heat exchange effect and reach the heat exchange temperature, while taking into account the water flow rate, thereby avoiding the water in the heat exchange tube 1 being unable to be heated to a suitable temperature due to the thickness h1 of the heat exchange tube 1 being set too large, and the water flow rate being too small when the thickness h1 of the heat exchange tube 1 is set too small, thereby affecting the water outlet.

[0066] like Figure 4 As shown, it should be noted that the thickness h1 of the heat exchange tube 1 refers to the sum of the wall thickness of the heat exchange tube 1 and the thickness of the heat exchange cavity inside the heat exchange tube 1 .

[0067] Exemplarily, the thickness h1 of the heat exchange tube 1 can be 10 mm, 12 mm, 14 mm, 16 mm, 18 mm, 20 mm, etc., which is not limited in this embodiment.

[0068] As Figure 3 and Figure 4 shown, in some embodiments, the height h2 of the heat exchange tube 1 and the thickness h1 of the heat exchange tube 1 satisfy:

[0069] By setting the height h2 of the heat exchange tube 1 and the thickness h1 of the heat exchange tube 1 to satisfy, both the heat exchange effect and the water flow rate of the heat exchange tube 1 are taken into account, avoiding that the water flow in the heat exchange tube 1 is too much to be heated to a suitable temperature due to the excessive height h2 of the heat exchange tube 1, while if the height h2 of the heat exchange tube 1 is set too small, the water flow rate will be too small, affecting the water output.

[0070] It should be noted here that the height h2 of the heat exchange tube 1 is correlated with the height of the bending space 13. Therefore, the setting of the height h2 of the heat exchange tube 1 will also affect the height of the bending space 13. The larger the height h2 of the heat exchange tube 1, the larger the height of the bending space 13, and heat exchange fins 2 with larger height dimensions can be placed in the bending space 13, which can enhance the heat exchange effect. On the contrary, the smaller the height h2 of the heat exchange tube 1, the smaller the height of the formed bending space 13.

[0071] Exemplarily, the height h2 of the heat exchange tube 1 can be etc., which is not limited in this embodiment.

[0072] As Figure 3 and Figure 4 shown, in some embodiments, the width L1 of the heat exchange tube 1 and the height h2 of the heat exchange tube 1 satisfy:

[0073] By setting the width L1 of the heat exchange tube 1 and the height h2 of the heat exchange tube 1 to satisfy, a dimensional design association exists between the width and height of the heat exchange tube 1, avoiding that the difference in their dimensions is too large to affect the heat exchange efficiency.

[0074] The width L1 of the heat exchange tube 1 is correlated with the length of the bending space 13. Therefore, the setting of the width L1 of the heat exchange tube 1 will also affect the length of the bending space 13. The larger the width L1 of the heat exchange tube 1, the larger the length of the bending space 13, and heat exchange fins 2 with larger length dimensions can be placed in the bending space 13, which can enhance the heat exchange effect. On the contrary, the smaller the width L1 of the heat exchange tube 1, the smaller the length of the formed bending space 13.

[0075] It should be noted here that asFigure 1 As shown, the length direction of the bending space 13 is consistent with the y direction.

[0076] As Figure 4 shown, in some embodiments, the length L2 of the heat exchange tube 1 and the width L1 of the heat exchange tube 1 satisfy:

[0077] By setting the length L2 of the heat exchange tube 1 and the width L1 of the heat exchange tube 1 to satisfy, a dimensional design correlation exists between the length and width of the heat exchange tube 1, avoiding the situation where the difference in their sizes is too large and affecting the heat exchange efficiency.

[0078] The length L2 of the heat exchange tube 1 is correlated with the width of the bending space 13 and the set number of the bending spaces 13. Therefore, the setting of the length L2 of the heat exchange tube 1 will also affect the width and number of the bending spaces 13. The larger the length L2 of the heat exchange tube 1, the larger the width of the bending space 13 can be set or the more the number of the bending spaces 13 can be set. Then, heat exchange fins 2 with a larger width dimension can be placed in the bending space 13 or more heat exchange fins 2 can be placed, enhancing the heat exchange effect. On the contrary, the smaller the length L2 of the heat exchange tube 1, the smaller the width of the bending space 13 is set or the fewer the number of the bending spaces 13 is set, and heat exchange fins 2 with a smaller width dimension are placed in the bending space 13 or fewer heat exchange fins 2 are placed.

[0079] It should be noted here that, as Figure 1 shown, the width direction of the bending space 13 is consistent with the x direction.

[0080] Through the special design of the thickness h1, height h2, width L1, and length L2 of the heat exchange tube 1 in this application, there is a correlation between the various dimensional designs, enabling the relevant dimensions of the heat exchange tube 1 to be within a relative value range, so that the heat exchange tube 1 can achieve the best heat exchange efficiency under the same volume and weight.

[0081] Both ends of the heat exchange tube 1 are sealed by end caps 14 to prevent internal water leakage. In this embodiment, flanges 113 are formed by extending outward from the peripheries of the water inlet 111 and the water outlet 112, facilitating the connection between the water inlet 111 and the water outlet 112 and external pipelines.

[0082] As Figure 5 and Figure 6 shown, in some embodiments, a plurality of heat exchange fins 21 are integrally folded from the heat exchange fin 2, and adjacent two heat exchange fins 21 are connected by a folding part 22.

[0083] By forming multiple heat exchange fins 21 integrally through folding the heat exchange sheet 2, the multiple heat exchange fins 21 are integrally manufactured and formed, with good structural integrity, convenient manufacturing and installation. During installation, the heat exchange sheet 2 can be integrally installed into the bending space 13, without manufacturing and installing each of the multiple heat exchange fins 21 one by one, improving the manufacturing and installation efficiency, and facilitating after-sales maintenance.

[0084] In some embodiments, the distance between any two adjacent heat exchange fins 21 is equal.

[0085] By setting the distance between any two adjacent heat exchange fins 21 to be equal, the multiple heat exchange fins 21 in the bending space 13 are evenly distributed, enabling them to exchange heat evenly with the heat exchange tube 1 and enhancing the heat exchange uniformity of the heat exchanger.

[0086] Such as Figure 7 and Figure 8 As shown, in some embodiments, the height L3 and width L4 of the heat exchange fin 21 are equal, and the distance L5 between two adjacent heat exchange fins 21 satisfies: L3 = L4 = 10×L5.

[0087] By setting the relationship between the height and width of the heat exchange fin 21 and the distance between the heat exchange fins 21, the heat exchange sheet 2 reaches the state of optimal heat exchange efficiency under the same volume and weight.

[0088] It should be noted here that the overall dimensions (length, width, and height) of the heat exchange sheet 2 are all smaller than the overall dimensions (length, width, and height) of the bending space 13, that is, the heat exchange sheet 2 is arranged inside the bending space 13 without exceeding the bending space 13, so as to ensure the heat exchange effect between the heat exchange sheet 2 and the heat exchange tube 1 while preventing the heat exchange sheet 2 from protruding out of the bending space 13 and occupying the internal space of the heat exchanger and interfering with the adjacent heat exchange tube 1.

[0089] Specifically, the heat exchange sheet 2 is preferably made by folding a copper plate or a steel plate with a thickness of 0.15 mm to 0.25 mm, taking into account both the heat exchange effect and the weight of the device.

[0090] In this embodiment, four heat exchange sheets 2 are provided, and the four heat exchange sheets 2 and the four bending spaces 13 are arranged in one-to-one correspondence, but it is not limited thereto. In other embodiments, the number of heat exchange sheets 2 is adjusted according to the number of bending spaces 13. For example, when six bending spaces 13 are provided, six heat exchange sheets 2 are correspondingly provided.

[0091] Such as Figure 5 As shown, in some embodiments, the heat exchanger further includes a limiting portion 3. The limiting portion 3 is connected to the heat exchange tube 1, the limiting portion 3 is located in the bending space 13, and the limiting portion 3 is arranged at the bottom of the heat exchange fin 21.

[0092] The provided limiting part 3, located at the bottom of the heat exchange fin 21, can limit and fix the position of the heat exchange fin 21, enhancing the connection stability between the heat exchange fin 21 and the heat exchange tube 1.

[0093] Specifically, the limiting part 3 extends into a strip shape along the length direction of the bending space 13. The strip-shaped limiting part 3 can support the bottoms of multiple heat exchange fins 21, improving the limiting stability. Preferably, the length of the limiting part 3 is equal to the length of the heat exchange fin 2, so that the limiting part 3 can stably support the bottoms of all the heat exchange fins 21.

[0094] In this embodiment, each bending space 13 is provided with two opposite limiting parts 3. The two opposite limiting parts 3 respectively support and limit the two sides of the heat exchange fin 21, enhancing the installation stability of both sides of the heat exchange fin 21.

[0095] In this embodiment, the limiting part 3 can be welded to the outer wall of the heat exchange tube 1. The folding parts 22 formed by folding the heat exchange fin 2 are all welded to the outer wall of the heat exchange tube 1, thereby realizing the welded connection between multiple heat exchange fins 21 and the heat exchange tube 1. When it is necessary to replace the heat exchange fin 2, only the de-welding treatment of the folding part 22 is required, which facilitates after-sales maintenance and replacement.

[0096] Of course, in other embodiments, the heat exchange fin 2 can also be fixed to the bending space 13 of the heat exchange tube 1 by means of clamping, etc. For example, clamping protrusions are provided in the bending space 13 to clamp and fix the heat exchange fin 2. When it is necessary to replace the heat exchange fin 2, the heat exchange fin 2 can be pulled out.

[0097] As Figure 6 shown, in some embodiments, one side of the outermost heat exchange fin 21 away from the folding part 22 has a hem 23, and the hem 23 is connected to the heat exchange tube 1, and the hem 23 forms an angle with the outermost heat exchange fin 21.

[0098] The provided hem 23 can be connected to the heat exchange tube 1 to enhance the connection strength of the outermost heat exchange fin 21, reducing the situation of the outermost heat exchange fin 21 falling off from the heat exchange tube 1.

[0099] In some embodiments, one side of the hem 23 away from the outermost heat exchange fin 21 abuts against the inner heat exchange fin 21.

[0100] Making one side of the hem 23 away from the outermost heat exchange fin 21 abut against the inner heat exchange fin 21 can prevent the outermost heat exchange fin 21 from deforming inward due to force during the installation process, enhancing the overall anti-deformation ability of the heat exchange tube 1, reducing the deformation occurring during the installation process, and facilitating the installation of the heat exchange tube 1.

[0101] Specifically, the hem 23 is reserved at the start and end of the folding of the heat exchange fin 2. That is, after determining the gap between adjacent heat exchange fins 21, the width of the hem 23 is reserved and then the heat exchange fins 21 are bent. After the last heat exchange fin 21 is folded, a hem 23 is reserved and folded at the end.

[0102] As Figure 4 and Figure 5 shown, in addition to the above settings, the heat exchanger of this embodiment further includes a water inlet pipe 4 and a water outlet pipe 5. The water inlet pipe 4 is provided with a first connection section 41, and the water outlet pipe 5 is provided with a second connection section 51. The first connection section 41 is connected to the flange 113 of the water inlet 111, and the second connection section 51 is connected to the flange 113 of the water outlet 112, so as to realize the connection between the water inlet pipe 4 and the water inlet 111, and the connection between the water outlet pipe 5 and the water outlet 112. To enhance the sealing performance, sealing rings can be provided between the first connection section 41 and the flange 113 of the water inlet 111, and between the second connection section 51 and the flange 113 of the water outlet 112.

[0103] The second aspect of the present invention provides a gas water heater, which includes the heat exchanger of the present invention.

[0104] Since the gas water heater of the present invention includes the heat exchanger of the present invention, the gas water heater of the present invention has the same technical effects as the heat exchanger of the present invention. For details, please refer to the above description, and this embodiment will not be elaborated here.

[0105] The heat exchanger and gas water heater of the present invention are made by bending the heat exchange tubes 1, and multiple heat exchange fins 2 are integrally folded from the heat exchange fin 2. The manufacturing process is simple. When one of the heat exchange fins 2 has carbon deposition and oxidation corrosion, only the damaged heat exchange fin 2 needs to be replaced, and there is no need to scrap the entire heat exchanger, which is convenient for after-sales maintenance and replacement, and also saves material resources.

[0106] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by this application.

Claims

1. A heat exchanger, characterized in that: include: A heat exchange tube (1) having a water inlet (111) and a water outlet (112), wherein the heat exchange tube (1) is bent to form at least two bending spaces (13); The heat exchange plate (2) is arranged in one-to-one correspondence with at least two of the bending spaces (13); the heat exchange plate (2) comprises a plurality of heat exchange fins (21); and the plurality of heat exchange fins (21) are arranged at intervals along the length direction of the bending space (13).

2. The heat exchanger according to claim 1, characterized in that The heat exchange tube (1) comprises: At least two first bending portions (11) are provided, and at least two of the first bending portions (11) are arranged in parallel and spaced apart along the length direction of the bending space (13); The second bending portion (12) is arranged between two adjacent first bending portions (11), and an angle is formed between the second bending portion (12) and the first bending portion (11), and the bending space (13) is formed between the second bending portion (12) and the two adjacent first bending portions (11).

3. The heat exchanger according to claim 2, characterized in that The distance between any two adjacent first bending portions (11) is equal.

4. The heat exchanger according to any one of claims 1 to 3, characterized in that: The heat exchange tube (1) is a flat tube, and the thickness h1 of the heat exchange tube (1) is: 10 mm ≤ h1 ≤ 20 mm.

5. The heat exchanger according to claim 4, characterized in that The height h2 of the heat exchange tube (1) and the thickness h1 of the heat exchange tube (1) satisfy the following conditions:

6. The heat exchanger according to claim 5, characterized in that The width L1 of the heat exchange tube (1) and the height h2 of the heat exchange tube (1) satisfy the following conditions:

7. The heat exchanger according to claim 6, characterized in that The length L2 of the heat exchange tube (1) and the width L1 of the heat exchange tube (1) satisfy the following conditions:

8. The heat exchanger according to any one of claims 1 to 3, characterized in that The plurality of heat exchange fins (21) are formed by integrally folding the heat exchange fin (2), and two adjacent heat exchange fins (21) are connected via a folded portion (22).

9. The heat exchanger according to claim 8, characterized in that The distance between any two adjacent heat exchange fins (21) is equal.

10. The heat exchanger according to claim 9, characterized in that The height L3 and width L4 of the heat exchange fins (21) are equal, and the spacing L5 between two adjacent heat exchange fins (21) satisfies: L3 = L4 = 10 × L5.

11. The heat exchanger according to any one of claims 1 to 3, characterized in that: The heat exchanger further comprises a limiting portion (3), the limiting portion (3) being connected to the heat exchange tube (1), the limiting portion (3) being located in the bending space (13), and the limiting portion (3) being arranged at the bottom of the heat exchange fin (21).

12. The heat exchanger according to claim 8, characterized in that The heat exchange fin (21) located at the outermost side has a folded edge (23) on the side away from the folded portion (22); the folded edge (23) is connected to the heat exchange tube (1); and the folded edge (23) and the heat exchange fin (21) located at the outermost side form an angle.

13. The heat exchanger according to claim 12, characterized in that The side of the folded edge (23) away from the outermost heat exchange fin (21) abuts against the heat exchange fin (21) located on the inner side.

14. A gas water heater, characterized in that: A heat exchanger comprising any one of claims 1 to 13.

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