Fin, heat exchanger and water heater

Abstract

A fin includes a substrate having a plurality of heat exchange tube holes. A guide notch is provided between two adjacent ones of the plurality of heat exchange tube holes on an upstream side of the substrate. The guide notch includes a converge part and a diverge part that are sequentially provided and communicated along a direction from the upstream side to a downstream side of the substrate.

Description

CROSS-REFERENCE TO RELATED APPLICATION

[0001] This application claims priority to Chinese Patent Application No. 202520348951.1, filed on Feb. 28, 2025, the entire contents of which are incorporated herein by reference.TECHNICAL FIELD

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

[0003] Heat exchanger is the core component of a water heater, and in gas water heaters, it plays a crucial role in the efficient utilization of gas. The core component of the heat exchanger is the fins. In related art, an unreasonable structural design of fins results in low heat exchange of flue gas and easily causes a risk of scalding a user when the water heater is used again after shutdown.SUMMARY

[0004] The main objective of the present application is to provide a fin, a heat exchanger and a water heater, which aims to increase heat exchange of flue gas and reduce a risk of scalding a user when the water heater is used again after shutdown.

[0005] To achieve the above objective, the present application provides a fin including a substrate. The substrate is opened with a plurality of heat exchange tube holes. The substrate has an upstream side and a downstream side. A guide notch is provided between any two adjacent heat exchange tube holes on the upstream side, the guide notch includes a converge part and a diverge part that are sequentially provided and communicated along a direction from the upstream side to the downstream side.

[0006] The present application further provides a heat exchanger including the fin described above.

[0007] The present application further provides a water heater including the heat exchanger as described above.BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to explain the embodiments of the present application or the technical solutions in the existing technology more clearly, the accompanying drawings needed to be used in the description of the embodiments or the existing technology will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present application, other accompanying drawings can be obtained based on the provided accompanying drawings without exerting creative efforts for those skilled in the art.

[0009] FIG. 1 is a schematic structural diagram of a fin according to an embodiment of the present application.

[0010] FIG. 2 is a schematic structural diagram of the structure in FIG. 1 from another perspective.

[0011] FIG. 3 is an enlarged view of point A in FIG. 2.

[0012] FIG. 4 is a schematic diagram of the connection between two fins.DESCRIPTION OF REFERENCE SIGNS

[0013] 10, fin;

[0014] 100, substrate; 101, upstream side; 102, downstream side; 103, first end; 104, second end; 105, first side surface; 106, second side surface; 110, heat exchange tube hole; 120, notch; 130, process notch; 140, mounting portion; 150, positioning flange; 160, guide notch; 161, converge part; 162, diverge part; 1621, first flange; 163, notch section; 1631, second flange; 1632, third flange; 164, cutout; 170, guide plate; 180, vent hole;

[0015] 200, guide section; 201, first sub guide section; 202, second sub guide section; 203, third sub guide section; 210, guide channel; 220, air inlet; 230, air outlet.

[0016] The present application will be further explained in conjunction with embodiments and with reference to the accompanying drawings.DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The technical solutions in the embodiments according to the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments according to the present application, and it is clear that the described embodiments are only a part of the embodiments according to the present application, and not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative labor fall within the scope of the present application.

[0018] It should be noted that if there are directional instructions (such as up, down, left, right, front, rear or the like) involved in the embodiments of the present application, the directional indications are only used to explain the relative positional relationship, movement and so on between various components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0019] In addition, if there are descriptions involving “first,”“second” or the like, the descriptions of “first,”“second” or the like are only for descriptive purposes and cannot be understood as indicating or implying the relative importance or implicitly indicating the quantity of the technical features indicated. Therefore, features defined as “first” and “second” may explicitly or implicitly include at least one of these features. In addition, the meaning of “and / or” appearing in the entire text includes three parallel solutions, taking “A and / or B” as an example, it includes solution A, or solution B, or a solution that satisfies both A and B at the same time. In addition, the technical solutions of various embodiments can be combined with each other, but it is based on that those skilled in the art can realize. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that such combination of technical solutions does not exist and is not within the protection scope claimed by the present application.

[0020] The present application provides a fin, a heat exchanger including the fin, and a water heater including the heat exchanger.

[0021] As shown in FIGS. 1 to 4, in an embodiment of the present application, the fin 10 includes a substrate 100. The substrate 100 is opened with a plurality of heat exchange tube holes 110. The substrate 100 has an upstream side 101 and a downstream side 102 (upstream and downstream with respect to the flow of the smoke). A guide notch 160 is provided between any two adjacent heat exchange tube holes 110 on the upstream side 101. The guide notch 160 includes a converge part 161 and a diverge part 162 that are sequentially arranged and communicated along a direction from the upstream side 101 to the downstream side 102.

[0022] In an embodiment, the substrate 100 is of a plate-shape. The substrate 100 can also be configured according to requirements, and no limitation is imposed herein. The heat exchange tube holes 110 are used for installation of heat exchange tubes. Arrangement of a plurality of heat exchange tube holes 110 enables simultaneous fixation of a plurality of heat exchange tubes. The plurality of heat exchange tube holes 110 on the substrate 100 can be provided in an inline manner, that is, the heat exchange tube holes 110 are aligned regardless of being provided in a row or in a column. This arrangement is easy to clean, and resistance is small when flue gas or other media flow through the substrate 100. However, compared with a staggered arrangement under identical conditions, a heat transfer coefficient is smaller and a heat exchange area is larger. In an embodiment, the plurality of heat exchange tube holes 110 on the substrate 100 of the fin 10 can be provided in a staggered manner, that is, the heat exchange tube holes 110 are not all aligned in a row direction or a column direction. This arrangement enhances disturbance to flue gas or other media and provides a larger heat transfer coefficient, which is beneficial to reducing a heat exchange area under identical conditions. It should be noted that the heat exchange tube holes 110 can be circular or elliptical, and can also have other shapes. Further, a flange can be provided at an edge of each heat exchange tube hole 110, which facilitates connection between the heat exchange tube hole 110 and a heat exchange tube and improves connection strength therebetween.

[0023] Further, a specific shape of the guide notch 160 is not limited, as long as the guide notch 160 includes a converge part 161 and a diverge part 162 that are provided in communication with each other. The converge part 161 and the diverge part 162 are sequentially arranged along a direction from the upstream side 101 to the downstream side 102 of the substrate 100.

[0024] The converge part 161 refers to a portion of the guide notch 160 in which a notch width shows a decreasing tendency along the direction from the upstream side 101 to the downstream side 102 of the substrate 100. The decreasing tendency can be a gradual decrease, a stepwise decrease, or a combination of a gradual decrease and a stepwise decrease, and no limitation is imposed herein.

[0025] The diverge part 162 refers to a portion of the guide notch 160 in which a notch width shows an increasing tendency along the direction from the upstream side 101 to the downstream side 102 of the substrate 100. The increasing tendency can be a gradual increase, a stepwise increase, or a combination of a gradual increase and a stepwise increase, and no limitation is imposed herein.

[0026] In an embodiment, a notch width of at least a part of the guide notch 160 decreases first and then increases along a direction from the upstream side 101 to the downstream side 102.

[0027] The technical solution of the present application provides that the guide notch 160 is provided between any two adjacent heat exchange tube holes 110 on the upstream side 101 of the substrate 100. The guide notch 160 guides high-temperature flue gas so as to increase a heat exchange amount of heat exchange tubes. In addition, the guide notch 160 includes the converge part 161 and the diverge part 162 that are sequentially arranged and communicated along the direction from the upstream side 101 to the downstream side 102. The converge part 161 accelerates a flow speed of the high-temperature flue gas, thereby increasing a heat exchange amount of adjacent heat exchange tubes within a same time period. The diverge part 162 enables the high-temperature flue gas to diffuse toward the downstream side 102, and the diverge part 162 further reduces a weight of the fin 10, thereby reducing heat storage of the heat exchanger. After the water heater stops combustion, a water temperature decreases. Provision of the diverge part 162 reduces heat storage of the heat exchanger, thereby preventing excessive stored heat of the heat exchanger from continuously transferring heat to the heat exchange tubes, avoiding excessively high heat in the heat exchange tubes. When the water heater is used again, a risk of scalding a user caused by an excessively high outlet water temperature of the water heater is reduced. Accordingly, the technical solution of the present application increases heat exchange of flue gas and reduces a risk of scalding a user when the water heater is used again after shutdown.

[0028] As shown in FIGS. 1 to 4, in an embodiment, the plurality of heat exchange tube holes 110 are provided in multiple rows on the substrate 100. Two heat exchange tube holes 110 in adjacent two rows are provided in a staggered manner along a direction from the upstream side 101 to the downstream side 102. An edge of the diverge part 162 is provided with a first flange 1621. The first flange 1621 is provided with a cutout 164. The cutout 164 and the heat exchange tube hole 110 in another row are arranged along the direction from the upstream side 101 to the downstream side 102.

[0029] It can be understood that, the plurality of heat exchange tube holes 110 are provided in multiple rows in a staggered manner, which enhances disturbance to flue gas, provides a larger heat transfer coefficient, and increases heat exchange between flue gas and heat exchange tubes.

[0030] Further, by providing the cutout 164 on the first flange 1621, high-temperature flue gas is guided to the heat exchange tube hole 110 in another row through the cutout 164, which is beneficial to increasing heat exchange between flue gas and heat exchange tubes. In an embodiment, the cutout 164 and the heat exchange tube hole 110 in another row are arranged to face each other.

[0031] As shown in FIG. 1, in an embodiment, the guide notch 160 further includes a notch section 163. The diverge part 162 is communicated with the notch section 163 and is sequentially arranged along a direction from the upstream side 101 to the downstream side 102. An edge of the notch section 163 is provided with a second flange 1631. The cutout 164 is provided on the second flange 1631. The notch section 163 is provided with a constant width.

[0032] It can be understood that, by providing the notch section 163 with a constant width, a weight of the fin 10 is further reduced, thereby further reducing heat storage of the heat exchanger. This arrangement is beneficial to reducing a risk of scalding a user when the water heater is used again after shutdown.

[0033] In an embodiment, the substrate 100 has a first side surface 105 and a second side surface 106 opposite to the first side surface 105. The first flange 1621 and the second flange 1631 are folded toward the first side surface 105. An edge of the notch section 163 is provided with a third flange 1632. The third flange 1632 is folded toward the second side surface 106. The third flange 1632 is provided opposite to the cutout 164.

[0034] It can be understood that, to simplify a processing procedure of the fin 10, the third flange 1632 is formed by stamping. Specifically, the cutout 164 is stamped on the second flange 1631, and a stamped flange is folded toward the second side surface 106 to form the third flange 1632. By providing the third flange 1632, adjacent fins 10 can abut against each other through the third flange 1632 to form a spacing, which is beneficial to flue gas flow, thereby ensuring stability of heat exchange efficiency of the heat exchanger.

[0035] In an embodiment, the substrate 100, the first flange 1621, and the second flange 1631 are integrally formed by stamping.

[0036] In an embodiment of the present application, a guide plate 170 is provided between a side edge of the substrate 100 and a heat exchange tube hole 110 adjacent to the side edge. The guide plate 170 extends along a direction from the upstream side 101 to the downstream side 102 and is inclined toward the heat exchange tube hole 110 adjacent to the side edge.

[0037] It can be understood that, the inclined guide plate 170 guides flue gas toward the heat exchange tube hole 110, so as to reduce direct discharge of flue gas toward the downstream side 102, thereby increasing contact time between the flue gas and the substrate 100 as well as the heat exchange tube, so that the substrate 100 and the heat exchange tube can perform sufficient heat exchange.

[0038] Further, the guide plate 170 can be formed by a stamping and flanging process performed on the substrate 100. After stamping, a vent hole 180 can be formed on the substrate 100. The vent hole 180 allows flue gas to pass through and contact substrates 100 of other fins 10 for heat exchange.

[0039] In an embodiment, the plurality of heat exchange tube holes 110 are provided in a double-row staggered manner on the substrate 100, and the guide plate 170 and the guide notch 160 are provided in a staggered manner along a direction from the upstream side 101 to the downstream side 102. With this arrangement, the guide plate 170 and the guide notch 160 cooperate to guide flue gas, so that the substrate 100 and the heat exchange tube can fully exchange heat with high-temperature flue gas, thereby improving heat exchange efficiency.

[0040] As shown in FIGS. 1 to 4, in an embodiment, at least one notch 120 is provided at one of the upstream side 101 and the downstream side 102, and a contour of the other of the upstream side 101 and the downstream side 102 is adapted to a shape of the notch 120.

[0041] When the downstream side 102 is provided with the notch 120, a notch wall of the notch 120 is adapted to a shape of a part of the heat exchange tube holes 110; and / or a contour of the upstream side 101 of the substrate 100 is adapted to a shape of a part of the heat exchange tube holes 110. With this arrangement, flue gas is guided, thereby improving a heat exchange effect.

[0042] During processing of the fin 10, a continuous die can be used to perform continuous stamping on the fin 10, and a contour of one fin 10 can be provided within the notch 120 of another fin 10. With this arrangement, waste of stamping material is reduced, material utilization is improved, and production cost of the fin 10 is reduced.

[0043] In an embodiment, an edge of the notch 120 is provided with a process notch 130 to place solder. The process notch 130 is spaced apart from the heat exchange tube holes 110.

[0044] A position of the process notch 130 in the notch 120 is not limited. The process notch 130 can be provided at a bottom of the notch 120, or can be provided on a side wall of the notch 120, as long as a solder bar can be conveniently placed into the process notch 130 from the notch 120. Compared with a process hole, the process notch 130 does not require an end of the solder bar to be aligned and inserted, and the process notch 130 is easy to process.

[0045] By providing the process notch 130 to place solder at an edge of the notch 120, during assembly of the fin 10 and a heat exchange tube, a solder bar can be placed into the process notch 130 from an opening of the notch 120. This arrangement facilitates placement of the solder bar, thereby improving soldering efficiency. The process notch 130 is spaced apart from the heat exchange tube holes 110, which ensures structural strength around the heat exchange tube holes 110. After melting, the solder bar can flow along the substrate 100 into a gap between a hole wall of the heat exchange tube hole 110 and the heat exchange tube, so as to fix the heat exchange tube on the fin 10. Accordingly, the fin 10 of the present application has high assembly efficiency and low production cost.

[0046] In an embodiment, the downstream side 102 is provided with a plurality of the notches 120, and a contour of the upstream side 101 is adapted to contours of the notches 120. The process notch 130 is provided between any two adjacent heat exchange tube holes 110. With this arrangement, a plurality of process notches 130 can be used to place a plurality of solder bars, thereby facilitating soldering and fixation of a plurality of heat exchange tubes.

[0047] In an embodiment, the substrate 100 has a first end 103 and a second end 104 disposed opposite to each other. The plurality of heat exchange tube holes 110 are arranged in a single row or in multiple rows along a direction from the first end 103 to the second end 104. The process notch 130 is provided between the first end 103 and a heat exchange tube hole 110 adjacent to the first end 103; and / or the process notch 130 is provided between the second end 104 and a heat exchange tube hole 110 adjacent to the second end 104.

[0048] With this arrangement, at least one process notch 130 is provided in each notch 120. When the plurality of heat exchange tube holes 110 are arranged in a single row, a number of the process notches 130 can be greater than a number of the heat exchange tube holes 110. In this manner, positions for placing solder bars can be selected as required, thereby facilitating soldering and fixation between the fin 10 and heat exchange tubes. When the plurality of heat exchange tube holes 110 are arranged in multiple rows, the process notch 130 provided between the first end 103 and / or the second end 104 of the substrate 100 and the heat exchange tube hole 110 adjacent thereto also facilitates placement of solder bars, thereby improving soldering convenience of the fin 10.

[0049] In an embodiment, the process notch 130 is provided at a bottom of the notch 120; and / or an opening of the process notch 130 faces the downstream side 102. With this arrangement, processing of the process notch 130 is facilitated, and flue gas is guided to flow toward the downstream side 102, thereby improving a heat exchange effect.

[0050] In an embodiment, the plurality of heat exchange tube holes 110 are arranged in a single row on the substrate 100. The upstream side 101 and / or the downstream side 102 are provided with mounting portions 140 to place solder. The mounting portions 140 are mounting holes or mounting notches.

[0051] In an embodiment, a shape and a position of the mounting portion 140 are not limited. The mounting portion 140 is a mounting hole or a mounting notch. The mounting portion 140 can be provided to be spaced apart from or communicated with the heat exchange tube hole 110. In this embodiment, the mounting portion 140 is a mounting notch, and the mounting notch is spaced apart from the heat exchange tube hole 110. A groove-shaped structure facilitates placement of solder, thereby improving soldering efficiency, and also helps ensure structural strength around the heat exchange tube hole 110.

[0052] In an embodiment, the plurality of heat exchange tube holes 110 are arranged in multiple rows on the substrate 100. The substrate 100 is provided with a plurality of mounting portions 140 to place solder. The mounting portions 140 are mounting holes or mounting notches. At least one mounting portion 140 is provided at a periphery of one heat exchange tube hole 110.

[0053] In an embodiment, the plurality of heat exchange tube holes 110 on the substrate 100 can be arranged in double rows, triple rows, or multiple rows. At least one mounting portion 140 is provided at a periphery of one heat exchange tube hole 110, thereby facilitating soldering and fixation of a plurality of heat exchange tubes to the fin 10.

[0054] In an embodiment, the plurality of heat exchange tube holes 110 are arranged in a double row on the substrate 100. The upstream side 101 and the downstream side 102 are both provided with the mounting portions 140. With this arrangement, soldering and fixation of heat exchange tubes installed in each heat exchange tube hole 110 are facilitated, and a structure of the fin 10 is regular and easy to process.

[0055] In any of the above embodiments, the mounting portion 140 is a mounting notch, and the mounting notch is spaced apart from the heat exchange tube hole 110.

[0056] In an embodiment, a flange is provided at a periphery of the heat exchange tube hole 110, and a positioning flange 150 is provided at an edge of the flange. A bending angle of the positioning flange 150 relative to the flange is adjustable, so as to adjust a height by which the positioning flange 150 protrudes from the substrate 100.

[0057] It can be understood that, a number of the positioning flanges 150 is not limited and can be one, two, or more. In this embodiment, each flange is provided with four positioning flanges 150, and the four positioning flanges 150 are arranged at intervals along a circumferential direction of the flange. The positioning flanges 150 have different bending angles relative to the flange, so that different distances are formed between the positioning flanges 150 and the substrate 100. Adjacent fins 10 abut against each other through the positioning flanges 150, thereby facilitating adjustment of a spacing between adjacent fins 10 and enabling spacings among a plurality of fins 10 to be more uniformly distributed, which helps ensure stability of heat exchange efficiency of a heat exchanger.

[0058] In an embodiment, the substrate 100, the flange, and the positioning flange 150 are integrally formed by stamping.

[0059] In an embodiment of the present application, the fin 10 includes a substrate 100 and a guide section 200. The substrate 100 is provided with a plurality of heat exchange tube holes 110 and vent holes 180 penetrating through the substrate 100 along a thickness direction. The substrate 100 has an upstream side 101 and a downstream side 102. A vent hole 180 is provided between any two adjacent heat exchange tube holes 110 adjacent to the downstream side 102. The guide section 200 is provided on the substrate 100 and located at the vent hole 180. The guide section 200 and the substrate 100 enclose a guide channel 210. The guide channel 210 communicates with the vent hole 180. The guide channel 210 has an air inlet 220 and an air outlet 230. The air inlet 220 faces the upstream side 101, and the air outlet 230 faces the downstream side 102.

[0060] In an embodiment, the substrate 100 is of a plate-shape. The substrate 100 can also be configured according to requirements, and no limitation is imposed herein. The heat exchange tube holes 110 are used for installation of heat exchange tubes. Arrangement of a plurality of heat exchange tube holes 110 enables simultaneous fixation of a plurality of heat exchange tubes. The plurality of heat exchange tube holes 110 on the substrate 100 can be provided in an inline manner, that is, the heat exchange tube holes 110 are aligned regardless of being provided in a row or in a column. This arrangement is easy to clean, and resistance is small when flue gas or other media flow through the substrate 100. However, compared with a staggered arrangement under identical conditions, a heat transfer coefficient is smaller and a heat exchange area is larger. In an embodiment, the plurality of heat exchange tube holes 110 on the substrate 100 of the fin 10 can be provided in a staggered manner, that is, the heat exchange tube holes 110 are not all aligned in a row direction or a column direction. This arrangement enhances disturbance to flue gas or other media and provides a larger heat transfer coefficient, which is beneficial to reducing a heat exchange area under identical conditions. It should be noted that the heat exchange tube holes 110 can be circular or elliptical, and can also have other shapes. Further, a flange can be provided at an edge of each heat exchange tube hole 110, which facilitates connection between the heat exchange tube hole 110 and a heat exchange tube and improves connection strength therebetween.

[0061] Further, a shape and a size of the vent hole 180 are not limited. For example, the vent hole 180 can be circular, square, or have other shapes. A structure and a shape of the guide section 200 are also not limited. For example, the guide section 200 can be an integral structure with the substrate 100; or the guide section 200 can be detachably provided on the substrate 100. The guide section 200 can be in a curved plate shape or a flat plate shape. An extending direction of the guide channel 210 is not limited. The extending direction of the guide channel 210 can be along a direction from the upstream side 101 to the downstream side 102, or can be provided in a circuitous and bent manner.

[0062] In the technical solution of the present application, high-temperature flue gas can flow between two opposite side surfaces of the substrate 100 through the vent hole 180. The air inlet 220 of the guide channel 210 faces the upstream side 101, and the air outlet 230 of the guide channel 210 faces the downstream side 102. The guide channel 210 guides flue gas from the upstream side 101 toward the downstream side 102, so that heat exchange between the flue gas and the heat exchange tube as well as the substrate 100 is smoother. In addition, under guidance of the guide channel 210, high-temperature flue gas flows more toward the heat exchange tube holes 110, thereby increasing heat exchange between the high-temperature flue gas and the substrate 100 as well as the heat exchange tube holes 110.

[0063] In an embodiment, the heat exchange tube hole 110 adjacent to the downstream side 102 has an upper side edge, a middle side edge, and a lower side edge. The guide section 200 is provided adjacent to the lower side edge and / or the middle side edge. With this arrangement, the guide channel 210 enclosed by the guide section 200 and the substrate 100 is spaced from the downstream side 102 of the substrate 100, so that flue gas guided through the guide channel 210 can perform more heat exchange with heat exchange tubes in the heat exchange tube holes 110, thereby improving a heat exchange amount.

[0064] It can be understood that, the plurality of heat exchange tube holes 110 are provided in multiple rows on the substrate 100, and two heat exchange tube holes 110 in adjacent two rows are provided in a staggered manner along a direction from the upstream side 101 to the downstream side 102. The heat exchange tube hole 110 adjacent to the upstream side 101 and the guide section 200 are arranged along the direction from the upstream side 101 to the downstream side 102. The air inlet 220 faces an end of the heat exchange tube hole 110 adjacent to the upstream side 101.

[0065] In an embodiment, the heat exchange tube hole 110 adjacent to the upstream side 101 and the guide section 200 are arranged to face each other, and the plurality of heat exchange tube holes 110 are provided in multiple staggered rows. In this arrangement, the guide section 200 is located at a junction area of flue gas convergence. A flow field at the junction area is complex and is prone to forming turbulence or local vortex regions, which reduces effectiveness of flue gas flow. By providing the guide section 200 at the junction area of flue gas convergence, that is, providing the guide channel 210 at the junction area of flue gas, guiding of flue gas and disruption of vortex flow fields are achieved, thereby improving smoothness of flue gas flow and further increasing heat exchange between flue gas and the substrate 100 as well as heat exchange tubes.

[0066] In an embodiment, the guide section 200 and the substrate 100 enclose one guide channel 210. A width of the guide channel 210 shows an increasing tendency along a direction from the upstream side 101 to the downstream side 102; or the width of the guide channel 210 is provided to be constant along the direction from the upstream side 101 to the downstream side 102.

[0067] It can be understood that, the width of the guide channel 210 shows an increasing tendency. The increasing tendency can be a gradual increase, a stepwise increase, or a combination of a gradual increase and a stepwise increase, and no limitation is imposed herein.

[0068] In an embodiment, when the width of the guide channel 210 shows an increasing tendency, the guide channel 210 guides flue gas. When the width of the guide channel 210 is provided to be constant, a structure of the guide section 200 is regular, which helps reduce resistance of the guide section 200 to flue gas flow.

[0069] In an embodiment, the guide section 200 and the substrate 100 enclose a plurality of guide channels 210. A number of the vent holes 180 is multiple, and one guide channel 210 communicates with one vent hole 180. Widths of the plurality of guide channels 210 all show an increasing tendency along a direction from the upstream side 101 to the downstream side 102; or widths of a part of the plurality of guide channels 210 show an increasing tendency along the direction from the upstream side 101 to the downstream side 102, and widths of another part of the plurality of guide channels 210 are provided to be constant along the direction from the upstream side 101 to the downstream side 102. With this arrangement, the plurality of guide channels 210 guide more flue gas, so that heat exchange between the flue gas and the heat exchange tubes as well as the substrate 100 is smoother, thereby increasing heat exchange between high-temperature flue gas and the substrate 100 as well as the heat exchange tube holes 110.

[0070] In an embodiment, the guide section 200 includes a first sub guide section 201. The first sub guide section 201 and the substrate 100 enclose a first sub guide channel 210. The first sub guide channel 210 communicates with one vent hole 180. A width of the first sub guide channel 210 shows an increasing tendency along a direction from the upstream side 101 to the downstream side 102.

[0071] It can be understood that, the first sub guide section 201 is located in a vortex region. By providing the first sub guide section 201, the first sub guide section 201 and the substrate 100 enclose the first sub guide channel 210. The first sub guide channel 210 guides flue gas, and the first sub guide section 201 disrupts a vortex flow field, thereby improving smoothness of flue gas flow and further increasing heat exchange between flue gas and the substrate 100 as well as heat exchange tubes.

[0072] The first sub guide section 201 includes a plurality of flat plates connected in sequence; or the first sub guide section 201 includes one or more arc-shaped plates, and no limitation is imposed herein. In this embodiment, the first sub guide section 201 is formed by directly stamping the substrate 100 along a thickness direction of the substrate 100. Direct stamping along the thickness direction forms the vent hole 180 and the guide channel 210, which increases heat exchange and helps simplify a processing procedure of the fin 10.

[0073] As shown in FIGS. 1 to 4, in an embodiment, the guide section 200 includes a second sub guide section 202. The second sub guide section 202 and the substrate 100 enclose a second sub guide channel 210. The second sub guide channel 210 communicates with one vent hole 180. A width of the second sub guide channel 210 is provided to be constant along a direction from the upstream side 101 to the downstream side 102. The second sub guide channel 210 is spaced apart from the first sub guide channel 210 and is located at a side of the first sub guide channel 210 adjacent to the downstream side 102.

[0074] It can be understood that, the second sub guide section 202 is located at a side of the first sub guide section 201 adjacent to the downstream side 102. A flow field at the second sub guide section 202 has lower complexity than a flow field at the first sub guide section 201. By reducing resistance to flue gas flow, smoothness of flue gas flow is further improved.

[0075] Further, the second sub guide section 202 and the substrate 100 enclose the second sub guide channel 210. A width of the second sub guide channel 210 is provided to be constant. A structure of the second sub guide section 202 is regular, which helps reduce resistance of the guide section 200 to flue gas flow.

[0076] The second sub guide section 202 includes a plurality of flat plates connected in sequence; or the second sub guide section 202 includes one or more arc-shaped plates, and no limitation is imposed herein. In this embodiment, the second sub guide section 202 is formed by directly stamping the substrate 100 along a thickness direction of the substrate 100. Direct stamping along the thickness direction forms the vent hole 180 and the guide channel 210, which increases heat exchange and helps simplify a processing procedure of the fin 10.

[0077] In an embodiment, the guide section 200 includes a third sub guide section 203. The third sub guide section 203 and the substrate 100 enclose a third sub guide channel 210. A width of the third sub guide channel 210 shows an increasing tendency along a direction from the upstream side 101 to the downstream side 102. The third sub guide channel 210 is spaced apart from the first sub guide channel 210 and is located at a side of the first sub guide channel 210 adjacent to the downstream side 102. A maximum width of the third sub guide channel 210 is smaller than a maximum width of the first sub guide channel 210.

[0078] It can be understood that, a structure of the third sub guide section 203 is similar to a structure of the first sub guide section 201. The third sub guide section 203 and the substrate 100 enclose the third sub guide channel 210. The third sub guide channel 210 guides high-temperature flue gas toward the heat exchange tube holes 110, thereby increasing heat exchange between flue gas and the substrate 100 as well as the heat exchange tubes.

[0079] The third sub guide section 203 includes a plurality of flat plates connected in sequence; or the third sub guide section 203 includes one or more arc-shaped plates, and no limitation is imposed herein. In this embodiment, the third sub guide section 203 is formed by directly stamping the substrate 100 along a thickness direction of the substrate 100. Direct stamping along the thickness direction forms the vent hole 180 and the guide channel 210, which increases heat exchange and helps simplify a processing procedure of the fin 10.

[0080] In an embodiment, the first sub guide section 201, the second sub guide section 202, and the third sub guide section 203 are arranged at intervals in sequence along a direction from the upstream side 101 to the downstream side 102. With this arrangement, a guiding effect on flue gas is further enhanced, and heat exchange between flue gas and heat exchange tubes is further increased.

[0081] In an embodiment, a flange is provided at a periphery of the heat exchange tube hole 110, and a positioning flange 150 is provided at an edge of the flange. A bending angle of the positioning flange 150 relative to the flange is adjustable, so as to adjust a height by which the positioning flange 150 protrudes from the substrate 100.

[0082] It can be understood that, a number of the positioning flanges 150 is not limited and can be one, two, or more. In this embodiment, each flange is provided with four positioning flanges 150, and the four positioning flanges 150 are arranged at intervals along a circumferential direction of the flange. The positioning flanges 150 have different bending angles relative to the flange, so that different distances are formed between the positioning flanges 150 and the substrate 100. Adjacent fins 10 abut against each other through the positioning flanges 150, thereby facilitating adjustment of a spacing between adjacent fins 10 and enabling spacings among a plurality of fins 10 to be more uniformly distributed, which helps ensure stability of heat exchange efficiency of a heat exchanger.

[0083] In an embodiment, the substrate 100, the flange, and the positioning flange 150 are integrally formed by stamping.

[0084] The present application further provides a heat exchanger. The heat exchanger includes the fin 10 described above. A specific structure of the fin 10 refers to the foregoing embodiments. Since the heat exchanger adopts all technical solutions of the foregoing embodiments, the heat exchanger has at least all beneficial effects brought by the technical solutions of the foregoing embodiments, which are not repeated herein.

[0085] In an embodiment, the heat exchanger includes a plurality of fins 10. The plurality of fins 10 are arranged side by side, which helps improve space utilization and enhance a heat exchange effect.

[0086] The present application further provides a water heater. The water heater includes the heat exchanger described above. A specific structure of the heat exchanger refers to the foregoing embodiments. Since the water heater adopts all technical solutions of the foregoing embodiments, the water heater has at least all beneficial effects brought by the technical solutions of the foregoing embodiments, which are not repeated herein.

[0087] The above are only some embodiments of the present application, and are not intended to limit the scope of the present application. Under the concept of the present application, any equivalent structure transformation made by using the description and accompanying drawings of the present application, or directly or indirectly applied in other related technical fields, is included within the scope of the present application.

Claims

1. A fin comprising:a substrate having a plurality of heat exchange tube holes;wherein a guide notch is provided between two adjacent ones of the plurality of heat exchange tube holes on an upstream side of the substrate, the guide notch including a converge part and a diverge part that are sequentially provided and communicated along a direction from the upstream side to a downstream side of the substrate.

2. The fin according to claim 1, wherein:the plurality of heat exchange tube holes are provided in a plurality of rows on the substrate, and two heat exchange tube holes in adjacent rows are staggered along the direction from the upstream side to the downstream side; andan edge of the diverge part is provided with a flange, the flange is provided with a cutout, and the cutout is arranged in alignment with a heat exchange tube hole in another row along the direction from the upstream side to the downstream side.

3. The fin according to claim 2, wherein:the flange is a first flange;the guide notch further includes a notch section;the diverge part communicates with the notch section and the diverge part and the notch section are sequentially arranged along the direction from the upstream side to the downstream side;an edge of the notch section is provided with a second flange;the cutout is provided at the second flange; andthe notch section has a uniform width.

4. The fin according to claim 3, wherein:the substrate has a first side surface and a second side surface opposite to the first side surface;the first flange and the second flange are bent toward the first side surface; andan edge of the notch section is provided with a third flange, the third flange is bent toward the second side surface, and the third flange is provided opposite to the cutout.

5. The fin according to claim 1, wherein:a guide plate is provided between a side edge of the substrate and a heat exchange tube hole adjacent to the side edge; andthe guide plate extends along the direction from the upstream side to the downstream side and is inclined toward the heat exchange tube hole adjacent to the side edge.

6. The fin according to claim 5, wherein:the plurality of heat exchange tube holes are provided in a double-row staggered arrangement on the substrate; andthe guide plate and the guide notch are staggered along the direction from the upstream side to the downstream side.

7. The fin according to claim 1, wherein:a notch is provided at one of the upstream side and the downstream side; anda contour of another one of the upstream side and the downstream side matches a shape of the notch.

8. The fin according to claim 7, wherein:an edge of the notch is provided with a process notch to place solder; andthe process notch is spaced apart from the heat exchange tube holes.

9. A heat exchanger comprising a fin including:a substrate having a plurality of heat exchange tube holes;wherein a guide notch is provided between two adjacent ones of the plurality of heat exchange tube holes on an upstream side of the substrate, the guide notch including a converge part and a diverge part that are sequentially provided and communicated along a direction from the upstream side to a downstream side of the substrate.

10. The heat exchanger according to claim 9, wherein:the plurality of heat exchange tube holes are provided in a plurality of rows on the substrate, and two heat exchange tube holes in adjacent rows are staggered along the direction from the upstream side to the downstream side; andan edge of the diverge part is provided with a flange, the flange is provided with a cutout, and the cutout is arranged in alignment with a heat exchange tube hole in another row along the direction from the upstream side to the downstream side.

11. The heat exchanger according to claim 10, wherein:the flange is a first flange;the guide notch further includes a notch section;the diverge part communicates with the notch section and the diverge part and the notch section are sequentially arranged along the direction from the upstream side to the downstream side;an edge of the notch section is provided with a second flange;the cutout is provided at the second flange; andthe notch section has a uniform width.

12. The heat exchanger according to claim 11, wherein:the substrate has a first side surface and a second side surface opposite to the first side surface;the first flange and the second flange are bent toward the first side surface; andan edge of the notch section is provided with a third flange, the third flange is bent toward the second side surface, and the third flange is provided opposite to the cutout.

13. The heat exchanger according to claim 9, wherein:a guide plate is provided between a side edge of the substrate and a heat exchange tube hole adjacent to the side edge; andthe guide plate extends along the direction from the upstream side to the downstream side and is inclined toward the heat exchange tube hole adjacent to the side edge.

14. The heat exchanger according to claim 13, wherein:the plurality of heat exchange tube holes are provided in a double-row staggered arrangement on the substrate; andthe guide plate and the guide notch are staggered along the direction from the upstream side to the downstream side.

15. The heat exchanger according to claim 9, wherein:a notch is provided at one of the upstream side and the downstream side; anda contour of another one of the upstream side and the downstream side matches a shape of the notch.

16. The heat exchanger according to claim 15, wherein:an edge of the notch is provided with a process notch to place solder; andthe process notch is spaced apart from the heat exchange tube holes.

17. A water heater comprising a heat exchanger including a fin including:a substrate having a plurality of heat exchange tube holes;wherein a guide notch is provided between two adjacent ones of the plurality of heat exchange tube holes on an upstream side of the substrate, the guide notch including a converge part and a diverge part that are sequentially provided and communicated along a direction from the upstream side to a downstream side of the substrate.

18. The water heater according to claim 17, wherein:the plurality of heat exchange tube holes are provided in a plurality of rows on the substrate, and two heat exchange tube holes in adjacent rows are staggered along the direction from the upstream side to the downstream side; andan edge of the diverge part is provided with a flange, the flange is provided with a cutout, and the cutout is arranged in alignment with a heat exchange tube hole in another row along the direction from the upstream side to the downstream side.

19. The water heater according to claim 18, wherein:the flange is a first flange;the guide notch further includes a notch section;the diverge part communicates with the notch section and the diverge part and the notch section are sequentially arranged along the direction from the upstream side to the downstream side;an edge of the notch section is provided with a second flange;the cutout is provided at the second flange; andthe notch section has a uniform width.

20. The water heater according to claim 19, wherein:the substrate has a first side surface and a second side surface opposite to the first side surface;the first flange and the second flange are bent toward the first side surface; andan edge of the notch section is provided with a third flange, the third flange is bent toward the second side surface, and the third flange is provided opposite to the cutout.

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