Heat exchange fin and water heater

Abstract

The present application provides a heat exchange fin and a water heater. The heat exchange fin comprises a plate body and first flue gas blocking plates. The plate body is provided with a first hole group and a second hole group, the first hole group comprising multiple first holes. The first flue gas blocking plates are connected to the plate body, the first flue gas blocking plates are arranged along the edges of the first holes, and each first flue gas blocking plate extends from between two adjacent first holes among the multiple first holes toward the side of the first holes away from the second hole group. High-temperature flue gas is guided by the first flue gas blocking plates to the leeward side of heat exchange tubes inserted into the first hole group, and the high-temperature flue gas exchanges heat with the heat exchange tubes again on the leeward side of the heat exchange tubes inserted into the first hole group, thereby increasing the flue gas density on the leeward side of the heat exchange tubes inserted into the first hole group, increasing the contact area and contact time between the heat exchange tubes and the high-temperature flue gas, and improving the heat exchange efficiency between the heat exchange tubes and the high-temperature flue gas.

Description

Heat exchange fins and water heater

[0001] This application claims priority to Chinese Patent Application No. 2024230728623, filed on December 11, 2024, entitled "Heat Exchange Fins and Water Heater", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of water heater technology, specifically, the design of a heat exchange fin and a water heater. Background Technology

[0003] Currently, in related technologies, gas water heaters are equipped with heat exchangers, which typically include heat exchange fins and heat exchange tubes. When high-temperature flue gas comes into contact with the heat exchanger, it exchanges heat with the water inside the heat exchange tubes, thereby heating the water. During the heat exchange process, when the high-temperature flue gas flows through the last row of heat exchange tubes, it comes into contact with the upwind side of the last row of heat exchange tubes. After exchanging heat with the heat exchange tubes, the flue gas flows out of the heat exchanger.

[0004] However, after the flue gas comes into contact with the upwind side of the exhaust heat exchange tube for heat exchange, the flue gas still has a certain amount of heat. When the flue gas flows out of the heat exchanger, it will cause the heat carried by the flue gas to be lost, thereby reducing the heat exchange efficiency between the heat exchanger and the flue gas. Summary of the Invention

[0005] This application aims to address at least one of the technical problems existing in the prior art or related technologies.

[0006] Therefore, the first aspect of this application proposes a heat exchange fin.

[0007] The second aspect of this application proposes a water heater.

[0008] In view of the above, the first aspect of this application provides a heat exchange fin, including a plate and a first smoke baffle; the plate is provided with a first hole group and a second hole group, the first hole group including a plurality of first holes; the first smoke baffle is connected to the plate, the first smoke baffle is arranged along the edge of the first hole, and the first smoke baffle extends from between two adjacent first holes in the plurality of first holes toward the side of the first hole away from the second hole group.

[0009] In this technical solution, the heat exchange fins include a plate body with a first group of holes and a second group of holes. The first group of holes and the second group of holes are used to install heat exchange tubes, thereby enabling the installation and fixation of the heat exchange tubes. Simultaneously, the plate body can increase the contact area between the heat exchange tubes and the high-temperature flue gas, thereby improving the heat exchange efficiency between the heat exchange tubes and the high-temperature flue gas.

[0010] The heat exchange fins also include a first baffle plate, which is connected to the plate body. The first baffle plate can turbulent the flue gas flowing through the heat exchange fins, thereby slowing down the flow speed of the flue gas at the heat exchange fins. Therefore, the heat exchange efficiency between the heat exchange fins and the high-temperature flue gas can be further improved.

[0011] The first baffle plate is arranged along the edge of the first hole. Multiple first holes include two adjacent first holes. A heat exchange tube is inserted within the first hole group. The first baffle plate extends from between two adjacent first holes towards the side of the first hole away from the second hole group. When the high-temperature flue gas flows to the first hole group, it comes into contact with the upwind side of the heat exchange tube, thus achieving heat exchange.

[0012] Because the first baffle plate extends from between two adjacent first holes towards the side of the first hole group away from the second hole group, after the high-temperature flue gas exchanges heat with the upwind side of the heat exchange tube, the high-temperature flue gas will be guided by the first baffle plate to the leeward side of the heat exchange tube. The high-temperature flue gas exchanges heat with the heat exchange tube again on the leeward side of the heat exchange tube, thereby increasing the flue gas density on the leeward side of the heat exchange tube inserted in the first hole group, increasing the contact area and contact time between the heat exchange tube and the high-temperature flue gas, and improving the heat exchange efficiency between the heat exchange tube and the high-temperature flue gas.

[0013] Furthermore, since the high-temperature flue gas exchanges heat with the heat exchange tube again on the downwind side of the heat exchange tube, the heat carried by the high-temperature flue gas can be utilized more fully, reducing the loss of heat carried by the high-temperature flue gas and improving the utilization rate of the heat carried by the high-temperature flue gas.

[0014] In addition, the heat exchange fins in the above-mentioned technical solution provided in this application may also have the following additional technical features:

[0015] Optionally, in some technical solutions of this application, the plurality of first holes include adjacent first mounting holes and second mounting holes, and the first smoke baffle includes a first smoke baffle portion and a second smoke baffle portion. The first smoke baffle portion extends from between the first mounting hole and the second mounting hole toward the side of the first mounting hole away from the second hole group. The second smoke baffle portion is connected to the first smoke baffle portion, and the second smoke baffle portion extends from between the first mounting hole and the second mounting hole toward the side of the second mounting hole away from the second hole group.

[0016] In this technical solution, the first smoke-blocking part extends from between the first and second mounting holes towards the side of the first mounting hole away from the second hole group. The second smoke-blocking part extends from between the first and second mounting holes towards the side of the second mounting hole away from the second hole group. That is, the first and second smoke-blocking parts extend towards the leeward side of the adjacent first and second mounting holes, respectively, so that more of the high-temperature flue gas between the first and second mounting holes can flow towards the leeward side of the first hole group, further reducing the loss of heat carried by the high-temperature flue gas and improving the utilization rate of the heat carried by the high-temperature flue gas.

[0017] Furthermore, the second smoke baffle is connected to the first smoke baffle, reducing the probability that high-temperature flue gas will flow directly out of the heat exchanger between the first and second mounting holes, thereby further improving the utilization rate of the heat carried by the high-temperature flue gas.

[0018] Optionally, in some technical solutions of this application, the first smoke baffle also includes a transition portion, which extends in an arc shape, and the two ends of the transition portion are respectively connected to the first smoke baffle and the second smoke baffle.

[0019] In this technical solution, a transition section is provided between the first smoke-blocking section and the second smoke-blocking section. The first smoke-blocking section is connected to the second smoke-blocking section through the transition section, so that the first smoke-blocking section and the second smoke-blocking section guide the high-temperature flue gas more smoothly.

[0020] Furthermore, the first smoke-blocking part and the second smoke-blocking part extend towards the first mounting hole and the second mounting hole, respectively. That is, the extending directions of the first smoke-blocking part and the second smoke-blocking part are different.

[0021] By setting a transition section between the first and second smoke baffles, there will be no sharp corners between the first and second smoke baffles when stamping the heat exchange fins. This reduces the difficulty of one-time forming of the heat exchange plate, improves the accuracy of the position of the first and second smoke baffles after forming, and thus improves the quality of the formed heat exchange fins.

[0022] In some technical solutions of this application, optionally, the plate body has a first edge on the side near the first hole group, the first edge is provided with a first groove, the first groove is recessed toward the side of the plate body near the second hole group, and the first smoke baffle is arranged along the edge of the first groove.

[0023] In this technical solution, a first groove is provided on the first edge, and a first smoke baffle is arranged along the edge of the first groove. The edge of the first groove can be bent and turned over to serve as the first smoke baffle, thereby enabling the first smoke baffle and the plate body to be stamped in one piece, further reducing the processing difficulty of the heat exchange fins, simplifying the processing technology of the heat exchange fins, and reducing the processing cost of the heat exchange fins.

[0024] Optionally, in some technical solutions of this application, the plate body has a second edge on the side near the second hole group, the second edge is provided with a second groove, the second groove is recessed towards the side of the plate body near the first hole group, and the second groove extends to the side of the second hole group near the first hole group.

[0025] In this technical solution, the plate has a second edge on the side near the second hole group, and a second groove is provided on the second edge. The second groove can guide the high-temperature flue gas to the area where the heat exchange fins are located more quickly, thereby improving the heat exchange efficiency between the heat exchange fins and the high-temperature flue gas.

[0026] The second groove is recessed towards the side of the plate closest to the first hole group, and the second groove extends to the side of the second hole group closest to the first hole group.

[0027] The second groove can guide the high-temperature flue gas to the downwind side of the second hole group, thereby increasing the flue gas density on the downwind side of the second hole group. This allows the high-temperature flue gas to exchange heat with the heat exchange tubes inserted in the second hole group on the downwind side, improving the heat exchange efficiency between the high-temperature flue gas and the heat exchange tubes inserted in the second hole group.

[0028] Optionally, in some technical solutions of this application, the heat exchange fins may further include a second smoke baffle, which is connected to the plate body and arranged along the edge of the second groove.

[0029] In this technical solution, the second baffle plate is connected to the plate body and arranged along the edge of the second groove. The high-temperature flue gas entering through the second groove can be guided by the second baffle plate, with some of the high-temperature flue gas flowing towards the first hole group and the other part flowing towards the second hole group. This allows the high-temperature flue gas to be more evenly distributed in various areas of the heat exchange fins, further improving the heat exchange efficiency between the high-temperature flue gas and the heat exchange fins.

[0030] Furthermore, the second baffle can generate a certain turbulence effect on the high-temperature flue gas entering the second groove, thereby slowing down the flow speed of the high-temperature flue gas at the heat exchange fins, prolonging the contact time between the high-temperature flue gas and the heat exchange fins, and further improving the heat exchange efficiency between the high-temperature flue gas and the heat exchange fins.

[0031] In some technical solutions of this application, optionally, the second groove is arranged in a polygonal shape, and the second smoke baffle is arranged on the side of the second groove near the second hole group.

[0032] In this technical solution, the second baffle plate is arranged on the side of the second groove near the second hole group. This allows the second baffle plate to guide the high-temperature flue gas to the leeward side of the second hole group, thereby increasing the flue gas density on the leeward side of the second hole group. This enables the high-temperature flue gas to exchange heat with the heat exchange tubes inserted in the second hole group on the leeward side, improving the heat exchange efficiency between the high-temperature flue gas and the heat exchange tubes. The leeward side of the second hole group is also the upwind side of the first hole group. Guiding the high-temperature flue gas to the leeward side of the second hole group also allows for more thorough heat exchange between the high-temperature flue gas and the upwind side of the heat exchange tubes inserted in the first hole group, further improving the heat exchange efficiency.

[0033] In some technical solutions of this application, optionally, the second hole group includes a plurality of second holes, and the second smoke baffle is arranged along the edge of the second hole and extends in an arc shape toward the side of the second hole closer to the first hole group.

[0034] In this technical solution, the second hole group includes multiple second holes, and the second smoke baffle is arranged along the edge of the second hole and extends in an arc shape toward the side of the second hole closer to the first hole group.

[0035] When the high-temperature flue gas passes through the second baffle, it can flow along the second baffle to the downwind side of the second hole group, thereby increasing the flue gas density on the downwind side of the second hole group. This allows the high-temperature flue gas to exchange heat with the heat exchange tubes inserted in the second hole group on the downwind side, improving the heat exchange efficiency between the high-temperature flue gas and the heat exchange tubes.

[0036] In some technical solutions of this application, optionally, there is a gap between the second smoke baffles corresponding to two adjacent second holes in a plurality of second holes.

[0037] In this technical solution, there is a gap between the second baffle plates corresponding to two adjacent second holes in the plurality of second holes, so that the high-temperature flue gas can enter the second groove through the gap, thereby preventing the second baffle plate from blocking the flow of high-temperature flue gas to the first hole group and increasing the flow rate of high-temperature flue gas between the heat exchange fins.

[0038] Optionally, in some technical solutions of this application, the heat exchange fins may further include a first connecting plate and a second connecting plate, wherein the first connecting plate is connected to the plate body and arranged around the first hole; and the second connecting plate is connected to the plate body and arranged around the second hole.

[0039] In this technical solution, the first connecting plate is connected to the plate body and arranged around the first hole. After the heat exchange tube is inserted into the first hole, the first connecting plate contacts the heat exchange tube, increasing the contact area between the heat exchange fins and the heat exchange tube, thereby accelerating the heat exchange rate between the heat exchange tube and the heat exchange fins. The heat transferred from the high-temperature flue gas to the heat exchange fins can be transferred to the heat exchange tube more quickly.

[0040] The second connecting plate is connected to the plate body and arranged around the second hole. After the heat exchange tube is inserted into the second hole, the second connecting plate contacts the heat exchange tube, increasing the contact area between the heat exchange fins and the heat exchange tube, thereby accelerating the heat exchange rate between the heat exchange tube and the heat exchange fins. The heat transferred from the high-temperature flue gas to the heat exchange fins can be transferred to the heat exchange tube more quickly.

[0041] Optionally, in some technical solutions of this application, the plate body is provided with a third through hole, the third through hole is opposite to the second groove, and the plate body also includes a third smoke baffle plate, the third smoke baffle plate is connected to the plate body and is arranged in a ring shape along the circumference of the third through hole.

[0042] In this technical solution, the third smoke baffle is connected to the plate body and arranged in a ring around the circumference of the third through hole. The third through hole is opposite to the second groove, which allows the third smoke baffle to turbulent the high-temperature flue gas entering the second groove. The high-temperature flue gas entering the second groove will flow towards the first holes on both sides of the third through hole, thereby preventing the high-temperature flue gas in the second groove from flowing directly out of the plate body from the leeward side.

[0043] Furthermore, after the high-temperature flue gas comes into contact with the third baffle plate, it will flow towards the first holes on both sides of the third baffle plate, increasing the turbulence of the high-temperature flue gas at the heat exchange fins, and further improving the heat exchange efficiency between the high-temperature flue gas and the heat exchange tube inserted in the first hole.

[0044] The third baffle plate is arranged in a ring around the third through hole, and can be directly punched into shape when the heat exchange fins are being punched. Furthermore, the third through hole is formed on the inner side of the third baffle plate, further reducing the manufacturing difficulty of the heat exchange fins, simplifying the manufacturing process, and lowering the manufacturing cost.

[0045] Optionally, in some technical solutions of this application, the plate body has a third edge, which extends from the second hole group to the first hole group, and the plate body also includes a fourth smoke baffle, which is connected to the plate body and arranged along the third edge.

[0046] In this technical solution, the plate has a third edge, which extends from the second hole group to the first hole group, that is, the third edge is the lateral edge of the plate.

[0047] The fourth baffle plate is connected to the plate body and arranged along the third edge. The fourth baffle plate can prevent high-temperature flue gas from flowing out of the heat exchange fins from the side, reduce the loss of high-temperature flue gas, and improve the utilization rate of the heat carried by the high-temperature flue gas.

[0048] The second aspect of this application provides a water heater including a heat exchanger, the heat exchanger including heat exchange fins as described in any of the above technical solutions, and thus the water heater possesses all the beneficial effects of the heat exchange fins of any of the above technical solutions.

[0049] In some technical solutions of this application, optionally, the number of heat exchange fins is multiple, and the multiple heat exchange fins are stacked. The heat exchanger also includes heat exchange tubes, end plates, and a cover. The number of heat exchange tubes is multiple, and the multiple heat exchange tubes are respectively inserted into the first group of holes and the second group of holes. The number of end plates is at least two, and at least two end plates are sleeved on the multiple heat exchange tubes and located on both sides of the multiple heat exchange fins. The cover is covered on the ends of two adjacent heat exchange tubes and connected to the end plates. The cover and the end plates enclose a flow guide cavity, and the two adjacent heat exchange tubes are connected through the flow guide cavity.

[0050] In this technical solution, multiple heat exchange fins are stacked, and multiple heat exchange tubes are respectively inserted into the first and second hole groups. Water can flow through the heat exchange tubes. When high-temperature flue gas passes through the heat exchanger, the high-temperature flue gas can heat the water inside the heat exchange tubes, thereby achieving the heating of cold water.

[0051] At least two end plates are fitted over multiple heat exchange tubes and located on both sides of multiple heat exchange fins to support and fix the heat exchange tubes, thereby improving the stability of the heat exchanger during operation.

[0052] The cover is placed over the ends of two adjacent heat exchange tubes and connected to the end plate. The cover and the end plate enclose a flow guide cavity, through which the two adjacent heat exchange tubes are connected. Cold water can flow through the heat exchange tubes sequentially, extending the flow path of the cold water within the heat exchange tubes and improving the heating effect of the high-temperature flue gas on the cold water.

[0053] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0054] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0055] Figure 1 shows one of the structural schematic diagrams of a heat exchange fin according to an embodiment of this application;

[0056] Figure 2 shows a second schematic diagram of the structure of a heat exchange fin according to an embodiment of this application;

[0057] Figure 3 shows one of the structural schematic diagrams of a heat exchanger according to an embodiment of this application;

[0058] Figure 4 shows a second schematic diagram of the structure of a heat exchanger according to an embodiment of this application.

[0059] The correspondence between the reference numerals and component names in Figures 1 to 4 is as follows: 100 heat exchange fins, 110 plate, 111 first edge, 112 first groove, 113 second edge, 114 second groove, 115 third through hole, 116 third edge, 117 third groove, 120 first hole group, 122 first hole, 124 first mounting hole, 126 second mounting hole, 130 second hole group, 132 second hole, 140 first smoke baffle, 142 first smoke baffle part, 144 second smoke baffle part, 146 transition part, 150 second smoke baffle, 152 gap, 160 first connecting plate, 170 second connecting plate, 180 third smoke baffle, 190 fourth smoke baffle, 192 third smoke baffle part, 194 fourth smoke baffle part, 200 heat exchanger, 210 heat exchange tube, 220 end plate, 230 cover, 232 flow guide cavity. Detailed Implementation

[0060] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0061] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0062] The following describes, with reference to Figures 1 to 4, some embodiments of the heat exchange fins 100, heat exchanger 200, and water heater according to this application.

[0063] In one embodiment of this application, as shown in Figures 1 and 2, a heat exchange fin 100 is provided, including a plate 110 and a first smoke baffle 140; the plate 110 is provided with a first hole group 120 and a second hole group 130, the first hole group 120 including a plurality of first holes 122; the first smoke baffle 140 is connected to the plate 110, the first smoke baffle 140 is arranged along the edge of the first hole 122, and the first smoke baffle 140 extends from between two adjacent first holes 122 in the plurality of first holes 122 toward the side of the first hole 122 away from the second hole group 130.

[0064] In this embodiment, the heat exchange fin 100 includes a plate 110, which is provided with a first hole group 120 and a second hole group 130. The first hole group 120 and the second hole group 130 are used to install the heat exchange tube 210, so as to realize the installation and fixation of the heat exchange tube 210. At the same time, the plate 110 can increase the contact area between the heat exchange tube 210 and the high-temperature flue gas, thereby improving the heat exchange efficiency between the heat exchange tube 210 and the high-temperature flue gas. The heat exchange fin 100 also includes a first baffle plate 140, which is connected to the plate 110. The first baffle plate 140 can turbulent the flue gas flowing through the heat exchange fin 100, thereby slowing down the flow velocity of the flue gas at the heat exchange fin 100, thus further improving the heat exchange efficiency between the heat exchange fin 100 and the high-temperature flue gas.

[0065] The first baffle plate 140 is arranged along the edge of the first hole 122. Multiple first holes 122 include two adjacent first holes 122. A heat exchange tube is inserted into the first hole group 120. The first baffle plate 140 extends from between two adjacent first holes 122 towards the side of the first hole 122 away from the second hole group 130. When the high-temperature flue gas flows to the first hole group 120, it comes into contact with the upwind side of the heat exchange tube 210, thereby achieving heat exchange.

[0066] Since the first baffle plate 140 extends from between two adjacent first holes 122 towards the side of the first holes 122 away from the second hole group 130, after heat exchange on the upwind side of the high-temperature flue gas heat exchange tube 210, the high-temperature flue gas will be guided by the first baffle plate 140 to the downwind side of the heat exchange tube 210. The high-temperature flue gas will then exchange heat with the heat exchange tube 210 again on the downwind side, thereby increasing the flue gas density on the downwind side of the heat exchange tube 210 inserted in the first hole group 120, increasing the contact area and contact time between the heat exchange tube 210 and the high-temperature flue gas, and improving the heat exchange efficiency between the heat exchange tube 210 and the high-temperature flue gas.

[0067] Furthermore, since the high-temperature flue gas exchanges heat with the heat exchange tube 210 again on the downwind side of the heat exchange tube 210, the heat carried by the high-temperature flue gas can be utilized more fully, reducing the loss of heat carried by the high-temperature flue gas and improving the utilization rate of the heat carried by the high-temperature flue gas.

[0068] Specifically, the heat exchange fin 100 is a stainless steel heat exchange fin, and the heat exchange fin 100 is used in the heat exchanger 200 of the gas water heater.

[0069] This embodiment provides a heat exchange fin 100, which, in addition to the technical features of the above embodiments, further includes the following technical features.

[0070] As shown in Figures 1 and 2, the plurality of first holes 122 include adjacent first mounting holes 124 and second mounting holes 126, and the first smoke baffle 140 includes a first smoke baffle portion 142 and a second smoke baffle portion 144. The first smoke baffle portion 142 extends from between the first mounting holes 124 and the second mounting holes 126 toward the side of the first mounting holes 124 away from the second hole group 130. The second smoke baffle portion 144 is connected to the first smoke baffle portion 142, and extends from between the first mounting holes 124 and the second mounting holes 126 toward the side of the second mounting holes 126 away from the second hole group 130.

[0071] In this embodiment, the first smoke-blocking part 142 extends from between the first mounting hole 124 and the second mounting hole 126 towards the side of the first mounting hole 124 away from the second hole group 130. The second smoke-blocking part 144 extends from between the first mounting hole 124 and the second mounting hole 126 towards the side of the second mounting hole 126 away from the second hole group 130. That is, the first smoke-blocking part 142 and the second smoke-blocking part 144 extend towards the leeward side of the adjacent first mounting hole 124 and the second mounting hole 126, so that the high-temperature flue gas between the first mounting hole 124 and the second mounting hole 126 can flow more towards the leeward side of the first hole group 120, further reducing the loss of heat carried by the high-temperature flue gas and improving the utilization rate of the heat carried by the high-temperature flue gas. Furthermore, the second smoke-blocking part 144 is connected to the first smoke-blocking part 142, reducing the probability that the high-temperature flue gas will directly flow out of the heat exchanger 200 between the first mounting hole 124 and the second mounting hole 126, further improving the utilization rate of the heat carried by the high-temperature flue gas.

[0072] Furthermore, the first smoke-blocking part 142 can be arranged concentrically with the first mounting hole 124.

[0073] The first smoke-blocking part 142 may also be arranged out of concentricity with the first mounting hole 124.

[0074] The second smoke baffle 144 can be arranged concentrically with the second mounting hole 126.

[0075] The second smoke baffle 144 may also be arranged out of concentricity with the second mounting hole 126.

[0076] Both the first smoke-blocking part 142 and the second smoke-blocking part 144 extend to the edge of the plate 110.

[0077] Specifically, the first hole 122 is a circular hole with an opening at the top, which facilitates the matching of the inner diameter of the first hole 122 with the outer diameter of the heat exchange tube 210.

[0078] Multiple first holes 122 are arranged in at least one row along the transverse direction of the plate 110.

[0079] Specifically, the diameter of the first hole 122 is greater than or equal to 12 mm and less than or equal to 18 mm. The diameter of the first hole 122 can be 12 mm, or it can be 13 mm, 14 mm, 15 mm, 16 mm or 17 mm, or it can be 18 mm.

[0080] The distance between any two adjacent first holes 122 is greater than or equal to 18 mm and less than or equal to 25 mm. The distance between any two adjacent first holes 122 can be 18 mm, or it can be 19 mm, 20 mm, 21 mm, 22 mm, 23 mm, or 24 mm, or it can be 25 mm.

[0081] This embodiment provides a heat exchange fin 100, which, in addition to the technical features of the above embodiments, further includes the following technical features.

[0082] As shown in Figures 1 and 2, the first smoke baffle 140 also includes a transition portion 146, which extends in an arc shape, and the two ends of the transition portion 146 are respectively connected to the first smoke baffle portion 142 and the second smoke baffle portion 144.

[0083] In this embodiment, a transition section 146 is provided between the first smoke-blocking section 142 and the second smoke-blocking section 144. The first smoke-blocking section 142 is connected to the second smoke-blocking section 144 through the transition section 146, so that the first smoke-blocking section 142 and the second smoke-blocking section 144 guide the high-temperature flue gas more smoothly.

[0084] Furthermore, the first smoke-blocking part 142 and the second smoke-blocking part 144 extend toward the first mounting hole 124 and the second mounting hole 126, respectively. That is, the extending directions of the first smoke-blocking part 142 and the second smoke-blocking part 144 are different.

[0085] By providing a transition section 146 between the first smoke baffle and the second smoke baffle 144, there will be no sharp corners between the first smoke baffle 142 and the second smoke baffle 144 when stamping the heat exchange fins 100. This reduces the difficulty of one-time forming of the heat exchange plate, improves the accuracy of the position of the first smoke baffle 142 and the second smoke baffle 144 after forming, and thus improves the quality of the formed heat exchange fins 100.

[0086] This embodiment provides a heat exchange fin 100, which, in addition to the technical features of the above embodiments, further includes the following technical features.

[0087] As shown in Figures 1 and 2, the plate 110 has a first edge 111 on the side near the first hole group 120. The first edge 111 is provided with a first groove 112. The first groove 112 is recessed towards the side of the plate 110 near the second hole group 130. The first smoke baffle 140 is arranged along the edge of the first groove 112.

[0088] In this embodiment, a first groove 112 is provided on the first edge 111, and a first smoke baffle 140 is arranged along the edge of the first groove 112. The edge of the first groove 112 can be bent and folded to serve as the first smoke baffle 140, thereby enabling the first smoke baffle 140 and the plate body 110 to be stamped in one piece, further reducing the processing difficulty of the heat exchange fins 100, simplifying the processing technology of the heat exchange fins 100, and reducing the processing cost of the heat exchange fins 100.

[0089] Specifically, the first edge 111 is the edge on the leeward side of the plate 110.

[0090] This embodiment provides a heat exchange fin 100, which, in addition to the technical features of the above embodiments, further includes the following technical features.

[0091] As shown in Figures 1 and 2, the plate 110 has a second edge 113 on the side near the second hole group 130. The second edge 113 is provided with a second groove 114. The second groove 114 is recessed towards the side of the plate 110 near the first hole group 120 and extends to the side of the second hole group 130 near the first hole group 120.

[0092] In this embodiment, the plate 110 has a second edge 113 on the side near the second hole group 130. The second edge 113 is provided with a second groove 114. The second groove 114 can guide the high-temperature flue gas to the area where the heat exchange fins 100 are located more quickly, thereby improving the heat exchange efficiency between the heat exchange fins 100 and the high-temperature flue gas.

[0093] The second groove 114 is recessed toward the side of the plate 110 near the first hole group 120, and the second groove 114 extends to the side of the second hole group 130 near the first hole group 120.

[0094] The second groove 114 can guide the high-temperature flue gas to the downwind side of the second hole group 130, thereby increasing the flue gas density on the downwind side of the second hole group 130, so that the high-temperature flue gas can exchange heat with the heat exchange tube 210 inserted in the second hole group 130 on the downwind side of the second hole group 130, thereby improving the heat exchange efficiency between the high-temperature flue gas and the heat exchange tube 210 inserted in the second hole group 130.

[0095] This embodiment provides a heat exchange fin 100, which, in addition to the technical features of the above embodiments, further includes the following technical features.

[0096] As shown in Figures 1 and 2, the heat exchange fins 100 also include a second smoke baffle 150, which is connected to the plate body 110 and arranged along the edge of the second groove 114.

[0097] In this embodiment, the second baffle plate 150 is connected to the plate body 110 and arranged along the edge of the second groove 114. High-temperature flue gas entering through the second groove 114 can be guided by the second baffle plate, with some flowing towards the first hole group 120 and the other towards the second hole group 130. This allows the high-temperature flue gas to be more evenly distributed across the heat exchange fins 100, further improving the heat exchange efficiency between the high-temperature flue gas and the heat exchange fins 100.

[0098] Furthermore, the second baffle can generate a certain turbulence effect on the high-temperature flue gas entering the second groove 114, thereby slowing down the flow speed of the high-temperature flue gas at the heat exchange fin 100, prolonging the contact time between the high-temperature flue gas and the heat exchange fin 100, and further improving the heat exchange efficiency between the high-temperature flue gas and the heat exchange fin 100.

[0099] This embodiment provides a heat exchange fin 100, which, in addition to the technical features of the above embodiments, further includes the following technical features.

[0100] As shown in Figures 1 and 2, the second groove 114 is arranged in a polygonal shape, and the second smoke baffle 150 is arranged on the side of the second groove 114 near the second hole group 130.

[0101] In this embodiment, the second baffle plate 150 is arranged on the side of the second groove 114 near the second hole group 130, so that the second baffle plate 150 can guide the high-temperature flue gas to the downwind side of the second hole group 130, thereby increasing the flue gas density on the downwind side of the second hole group 130. This allows the high-temperature flue gas to exchange heat with the heat exchange tube 210 inserted in the second hole group 130 on the downwind side, improving the heat exchange efficiency between the high-temperature flue gas and the heat exchange tube 210. The downwind side of the second hole group 130 is also the upwind side of the first hole group 120. Guiding the high-temperature flue gas to the downwind side of the second hole group 130 also allows for more thorough heat exchange between the high-temperature flue gas and the upwind side of the heat exchange tube 210 inserted in the first hole group 120, further improving the heat exchange efficiency.

[0102] This embodiment provides a heat exchange fin 100, which, in addition to the technical features of the above embodiments, further includes the following technical features.

[0103] As shown in Figures 1 and 2, the second hole group 130 includes a plurality of second holes 132, and the second smoke baffle 150 is arranged along the edge of the second hole 132 and extends in an arc shape toward the side of the second hole 132 closer to the first hole group 120.

[0104] In this embodiment, the second hole group 130 includes a plurality of second holes 132, and the second smoke baffle 150 is arranged along the edge of the second hole 132 and extends in an arc shape toward the side of the second hole 132 closer to the first hole group 120.

[0105] When the high-temperature flue gas passes through the second baffle plate 150, it can flow along the second baffle plate 150 to the downwind side of the second hole group 130, thereby increasing the flue gas density on the downwind side of the second hole group 130. This allows the high-temperature flue gas to exchange heat with the heat exchange tube 210 inserted in the second hole group 130 on the downwind side, thereby improving the heat exchange efficiency between the high-temperature flue gas and the heat exchange tube 210.

[0106] Furthermore, the second smoke baffle 150 can be arranged concentrically with the second hole 132.

[0107] The second smoke baffle 150 may also be arranged out of concentricity with the second hole 132.

[0108] Specifically, the second hole 132 is a circular hole with an opening at the top. The opening facilitates the placement of solder, thereby facilitating the welding of the heat exchange tube 210 and the heat exchange fin 100.

[0109] The plurality of second holes 132 are arranged in at least one row along the transverse direction of the plate 110. The plurality of second holes 132 may be arranged opposite to the plurality of first holes 122, or the plurality of second holes 132 may be arranged alternately with the plurality of first holes 122.

[0110] Specifically, the diameter of the second hole 132 is greater than or equal to 12 mm and less than or equal to 18 mm. The diameter of the second hole 132 can be 12 mm, or it can be 13 mm, 14 mm, 15 mm, 16 mm or 17 mm, or it can be 18 mm.

[0111] The distance between any two adjacent second holes 132 is greater than or equal to 18 mm and less than or equal to 25 mm. The distance between any two adjacent second holes 132 can be 18 mm, or it can be 19 mm, 20 mm, 21 mm, 22 mm, 23 mm, or 24 mm, or it can be 25 mm.

[0112] This embodiment provides a heat exchange fin 100, which, in addition to the technical features of the above embodiments, further includes the following technical features.

[0113] As shown in Figures 1 and 2, there is a gap 152 between the second smoke baffles 150 corresponding to two adjacent second holes 132.

[0114] In this embodiment, there is a gap 152 between the second baffle plates 150 corresponding to two adjacent second holes 132, so that the high-temperature flue gas can enter the second groove 114 through the gap 152, thereby preventing the second baffle plates 150 from blocking the flow of high-temperature flue gas to the first hole group 120 and increasing the flow rate of high-temperature flue gas between the heat exchange fins 100.

[0115] This embodiment provides a heat exchange fin 100, which, in addition to the technical features of the above embodiments, further includes the following technical features.

[0116] As shown in Figures 1 and 2, the heat exchange fins 100 also include a first connecting plate 160 and a second connecting plate 170. The first connecting plate 160 is connected to the plate body 110 and arranged around the first hole 122; the second connecting plate 170 is connected to the plate body 110 and arranged around the second hole 132.

[0117] In this embodiment, the first connecting plate 160 is connected to the plate body 110 and arranged around the first hole 122. After the heat exchange tube 210 is inserted into the first hole 122, the first connecting plate 160 contacts the heat exchange tube 210, increasing the contact area between the heat exchange fins 100 and the heat exchange tube 210, thereby accelerating the heat exchange rate between the heat exchange tube 210 and the heat exchange fins 100. The heat transferred from the high-temperature flue gas to the heat exchange fins 100 can be transferred to the heat exchange tube 210 more quickly.

[0118] The second connecting plate 170 is connected to the plate body 110 and arranged around the second hole 132. After the heat exchange tube 210 is inserted into the second hole 132, the second connecting plate 170 contacts the heat exchange tube 210, increasing the contact area between the heat exchange fins 100 and the heat exchange tube 210, thereby accelerating the heat exchange rate between the heat exchange tube 210 and the heat exchange fins 100. The heat transferred from the high-temperature flue gas to the heat exchange fins 100 can be transferred to the heat exchange tube 210 more quickly.

[0119] Specifically, the first connecting plate 160 is welded to the heat exchange tube 210, or the first connecting plate 160 is interference-fitted with the heat exchange tube 210.

[0120] The second connecting plate 170 is welded to the heat exchange tube 210, or the second connecting plate 170 is interference-fitted to the heat exchange tube 210.

[0121] Specifically, the distance between the outer sidewall of the first smoke baffle 140 and the first connecting plate 160 is greater than or equal to 2 mm and less than or equal to 6 mm.

[0122] The distance between the outer side wall of the first smoke baffle 140 and the first connecting plate 160 can be 2 mm, or it can be 3 mm, 4 mm or 5 mm, or it can be 6 mm.

[0123] Specifically, the height of the first smoke baffle 140 is greater than or equal to 1 mm and less than or equal to 2 mm.

[0124] The height of the first smoke baffle 140 can be 1 mm, 1.5 mm, or 2 mm.

[0125] Specifically, the distance between the outer sidewall of the second smoke baffle 150 and the second connecting plate 170 is greater than or equal to 2 mm and less than or equal to 6 mm.

[0126] The distance between the second smoke baffle 150 and the outer wall of the second connecting plate 170 can be 2 mm, or it can be 3 mm, 4 mm or 5 mm, or it can be 6 mm.

[0127] Specifically, the height of the second smoke baffle 150 is greater than or equal to 1 mm and less than or equal to 2 mm.

[0128] The height of the second smoke baffle 150 can be 1 mm, 1.5 mm, or 2 mm.

[0129] This embodiment provides a heat exchange fin 100, which, in addition to the technical features of the above embodiments, further includes the following technical features.

[0130] As shown in Figures 1 and 2, the plate 110 is provided with a third through hole 115, which is opposite to the second groove 114. The plate 110 also includes a third smoke baffle 180, which is connected to the plate 110 and is arranged in a ring along the circumference of the third through hole 115 (in the direction indicated by arrow E in Figure 2).

[0131] In this embodiment, the third smoke baffle 180 is connected to the plate body 110 and is arranged in a ring around the circumference of the third through hole 115. The third through hole 115 is opposite to the second groove 114, so that the third smoke baffle 180 can turbulently flow the high-temperature flue gas entering the second groove 114. The high-temperature flue gas entering the second groove 114 will flow towards the first holes 122 on both sides of the third through hole 115, thereby preventing the high-temperature flue gas in the second groove 114 from flowing directly out of the plate body 110 from the downwind side of the plate body 110.

[0132] Furthermore, after the high-temperature flue gas comes into contact with the third baffle plate 180, it will flow towards the first holes 122 on both sides of the third baffle plate 180, increasing the turbulence of the high-temperature flue gas at the heat exchange fins 100, and further improving the heat exchange efficiency between the high-temperature flue gas and the heat exchange tubes 210 inserted in the first holes 122.

[0133] The third baffle plate 180 is arranged in a ring around the third through hole 115. It can be directly punched and formed when the heat exchange fin 100 is punched. Furthermore, the third through hole 115 is formed on the inner side of the third baffle plate 180, which further reduces the manufacturing difficulty of the heat exchange fin 100, simplifies the manufacturing process of the heat exchange fin 100, and reduces the manufacturing cost of the heat exchange fin 100.

[0134] Furthermore, the third through hole 115 and the third smoke baffle 180 are disposed between two adjacent first holes 122 in the first hole group 120.

[0135] The third smoke baffle 180 can be formed in one stamping process during the stamping of the heat exchange fins 100 by a punching process.

[0136] Specifically, the diameter of the third through hole 115 is greater than or equal to 2 mm and less than or equal to 5 mm.

[0137] The diameter of the third through hole 115 can be 2 mm, 3 mm or 4 mm, or even 5 mm.

[0138] This embodiment provides a heat exchange fin 100, which, in addition to the technical features of the above embodiments, further includes the following technical features.

[0139] As shown in Figures 1 and 2, the plate 110 has a third edge 116, which extends from the second hole group 130 to the first hole group 120. The plate 110 also includes a fourth smoke baffle 190, which is connected to the plate 110 and arranged along the third edge 116.

[0140] In this embodiment, the plate 110 has a third edge 116, which extends from the second hole group 130 to the first hole group 120, i.e., the third edge 116 is the lateral edge of the plate 110. The fourth smoke baffle 190 is connected to the plate 110 and arranged along the third edge 116. The fourth smoke baffle 190 can prevent high-temperature flue gas from flowing out of the heat exchange fins 100 from the side, thereby reducing the loss of high-temperature flue gas and improving the utilization rate of the heat carried by the high-temperature flue gas.

[0141] Specifically, the third edge 116 is provided with a third groove 117 that is recessed into the plate body 110. The fourth smoke baffle 190 includes a third smoke baffle portion 192 and a fourth smoke baffle portion 194. The third smoke baffle portion 192 is located on the side of the third groove 117 near the first hole group 120, and the fourth smoke baffle portion 194 is located on the side of the third groove 117 near the second hole group 130. The fourth smoke baffle portion 194 extends into the plate body 110 along the edge of the third groove 117.

[0142] In one embodiment of this application, a water heater is provided, including a heat exchanger 200, which includes heat exchange fins 100 as described in any of the above embodiments. Therefore, the water heater has all the beneficial effects of the heat exchange fins 100 of any of the above embodiments.

[0143] Specifically, the water heater is a gas water heater.

[0144] This embodiment provides a heat exchanger 200, which, in addition to the technical features of the above embodiments, further includes the following technical features.

[0145] As shown in Figures 1, 2, 3, and 4, there are multiple heat exchange fins 100 stacked together. The heat exchanger 200 also includes heat exchange tubes 210, end plates 220, and a cover 230. Multiple heat exchange tubes 210 are respectively inserted into the first hole group 120 and the second hole group 130. At least two end plates 220 are fitted over the multiple heat exchange tubes 210 and located on both sides of the multiple heat exchange fins 100. The cover 230 covers the ends of two adjacent heat exchange tubes 210 and is connected to the end plates 220. The cover 230 and the end plates 220 enclose a flow guide cavity 232, through which the two adjacent heat exchange tubes 210 are connected.

[0146] In this embodiment, multiple heat exchange fins 100 are stacked, and multiple heat exchange tubes 210 are respectively inserted into the first hole group 120 and the second hole group 130. Water can flow through the heat exchange tubes 210. When the high-temperature flue gas passes through the heat exchanger 200, the high-temperature flue gas can heat the water inside the heat exchange tubes 210, thereby achieving the heating of cold water.

[0147] At least two end plates 220 are fitted onto multiple heat exchange tubes 210 and located on both sides of multiple heat exchange fins 100 to support and fix the heat exchange tubes 210, thereby improving the stability of the heat exchanger 200 during operation.

[0148] A cover 230 is installed over the ends of two adjacent heat exchange tubes 210 and connected to an end plate 220. The cover 230 and the end plate 220 form a flow guide cavity 232, through which the two adjacent heat exchange tubes 210 are connected. Cold water can flow through the heat exchange tubes 210 sequentially, extending the flow path of the cold water within the heat exchange tubes 210 and improving the heating effect of the high-temperature flue gas on the cold water.

[0149] Furthermore, multiple heat exchange fins 100 are welded to heat exchange tubes 210.

[0150] The cover 230 is welded to the surface of the end plate 220.

[0151] The ends of the two connected heat exchange tubes 210 located on the same side are divided into an inlet and an outlet. The cover 230 is placed over the inlet and outlet. The water in the heat exchange tube 210 flows out of the outlet and enters the guide cavity 232. The water in the guide cavity 232 then enters the adjacent heat exchange tube 210 through the inlet.

[0152] Furthermore, the flange height of the third smoke baffle 180 is less than the distance between two adjacent heat exchange fins 100.

[0153] The flange height of the third baffle plate 180 is less than the distance between two adjacent heat exchange fins 100, allowing the high-temperature flue gas to flow between the heat exchange fins 100, enhancing turbulence and improving the heat exchange efficiency of the heat exchanger 200.

[0154] Specifically, as shown in Figure 2, when the high-temperature flue gas flows upward through the heat exchanger 200, a portion of the high-temperature flue gas rushes directly below the heat exchange tube 210 and then flows upward along the lower half of the heat exchange tube 210 (the high-temperature flue gas flows in the direction indicated by arrow A in Figure 2). The second baffle plates 150, which are concentric with the second tube holes and are arranged on both sides of the second groove 114, guide this portion of the high-temperature flue gas, causing more of the high-temperature flue gas to flow along the circumference of the heat exchange tube 210 to the heat exchange dead zone between the upper and lower rows of heat exchange tubes 210 (the high-temperature flue gas flows in the direction indicated by arrow B in Figure 2), thereby increasing the effective heat exchange area of ​​the heat exchange fins 100. At the same time, the second baffle plates 150 also turbulent the high-temperature flue gas, reducing the heat exchange thermal resistance. Another portion of the high-temperature flue gas is guided to the upper row of heat exchange tubes 210 by the groove, and the high-temperature flue gas flows upward to the lower side of the third baffle plate 180 between the upper row of tube holes. The high-temperature flue gas flows upward along the lower side of the upper heat exchange tube 210 (flowing in the direction indicated by arrow C in Figure 2). Under the turbulence effect of the third baffle plate 180 and the blocking effect of the first baffle plate 140, the high-temperature flue gas flows closer to the upper heat exchange tube 210 (flowing in the direction indicated by arrow D in Figure 2), which increases the effective heat exchange area of ​​the back flue gas region of the upper heat exchange tube 210 and promotes heat exchange between the upper heat exchange tube 210 and the high-temperature flue gas.

[0155] The fourth baffle plate 190 on both sides of the heat exchange fin 100 can concentrate the high-temperature flue gas in the area of ​​the heat exchange fin 100 to prevent the high-temperature flue gas from overflowing.

[0156] By adopting the aforementioned second groove 114, first smoke baffle 140, second smoke baffle 150, third smoke baffle 180, and fourth smoke baffle 190, the effective heat exchange area of ​​the heat exchange fins 100 and the heat transfer coefficient on the high-temperature flue gas side are increased. As shown in Table 1, according to the experimental test results, under the same conditions, the thermal efficiency of the heat exchanger 200 is significantly improved.

[0157] Table 1

[0158] In the claims, description, and accompanying drawings of this application, the term "plural" refers to two or more objects. Unless otherwise explicitly defined, the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this application and simplifying the descriptive process, and are not intended to indicate or imply that the device or element referred to must have the described specific orientation, or be constructed and operated in a specific orientation. Therefore, these descriptions should not be construed as limitations on this application. The terms "connection," "installation," "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection between multiple objects, a detachable connection between multiple objects, or an integral connection; it can be a direct connection between multiple objects or an indirect connection between multiple objects through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this application can be understood based on the specific circumstances described above.

[0159] In the claims, description, and accompanying drawings of this application, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In the claims, description, and accompanying drawings of this application, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0160] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A heat exchange fin, wherein, include: A plate body, wherein the plate body is provided with a first hole group and a second hole group, the first hole group including a plurality of first holes; The first smoke baffle is connected to the plate body and is arranged along the edge of the first hole. The first smoke baffle extends from between two adjacent first holes in the plurality of first holes toward the side of the first hole away from the second hole group.

2. The heat exchange fins according to claim 1, wherein, The plurality of first holes include adjacent first mounting holes and second mounting holes, and the first smoke baffle includes: The first smoke-blocking part extends from between the first mounting hole and the second mounting hole toward the side of the first mounting hole away from the second hole group; The second smoke-blocking part is connected to the first smoke-blocking part, and the second smoke-blocking part extends from between the first mounting hole and the second mounting hole to the side of the second mounting hole away from the second hole group.

3. The heat exchange fins according to claim 2, wherein, The first smoke baffle also includes: The transition section extends in an arc shape, and its two ends are respectively connected to the first smoke-blocking section and the second smoke-blocking section.

4. The heat exchange fins according to any one of claims 1 to 3, wherein, The plate has a first edge on the side near the first hole group, and the first edge is provided with a first groove. The first groove is recessed toward the side of the plate near the second hole group, and the first smoke baffle is arranged along the edge of the first groove.

5. The heat exchange fins according to any one of claims 1 to 4, wherein, The plate has a second edge on the side near the second hole group, and the second edge is provided with a second groove. The second groove is recessed towards the side of the plate near the first hole group and extends to the side of the second hole group near the first hole group.

6. The heat exchange fins according to claim 5, wherein, The heat exchange fins also include: The second smoke baffle is connected to the plate body and is arranged along the edge of the second groove.

7. The heat exchange fins according to claim 6, wherein, The second groove is polygonal in shape, and the second smoke baffle is arranged on the side of the second groove near the second hole group.

8. The heat exchange fins according to claim 6 or 7, wherein, The second hole group includes a plurality of second holes, and the second smoke baffle is arranged along the edge of the second hole and extends in an arc shape toward the side of the second hole closer to the first hole group.

9. The heat exchange fins according to claim 8, wherein, There is a gap between the second smoke baffles corresponding to two adjacent second holes in the plurality of second holes.

10. The heat exchange fins according to claim 8 or 9, wherein, Also includes: A first connecting plate is connected to the plate body and is arranged around the first hole; The second connecting plate is connected to the plate body and is arranged around the second hole.

11. The heat exchange fins according to any one of claims 5 to 10, wherein, The plate body is provided with a third through hole, the third through hole being opposite to the second groove, and the plate body further includes: The third smoke baffle is connected to the plate body and is arranged in a ring shape along the circumference of the third through hole.

12. The heat exchange fins according to any one of claims 1 to 11, wherein, The plate has a third edge extending from the second hole group toward the first hole group, and the plate further includes: A fourth smoke baffle is connected to the plate body and is arranged along the third edge.

13. A water heater, wherein, include: A heat exchanger comprising heat exchange fins as claimed in any one of claims 1 to 12.

14. The water heater according to claim 13, wherein, The heat exchange fins are multiple, and the multiple heat exchange fins are stacked. The heat exchanger also includes: The heat exchange tubes are multiple, and the multiple heat exchange tubes are respectively inserted into the first group of holes and the second group of holes; End plates, the number of which is at least two, the at least two end plates are sleeved on the plurality of heat exchange tubes and located on both sides of the plurality of heat exchange fins; A cover is provided on the ends of two adjacent heat exchange tubes among the plurality of heat exchange tubes and is connected to the end plate. The cover and the end plate form a flow guide cavity, through which the two adjacent heat exchange tubes are connected.

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