Heat exchange sheet, heat exchanger and gas water heater

Abstract

The utility model belongs to the technical field of water heaters, and particularly discloses a heat exchange sheet, a heat exchanger and a gas water heater. A plurality of through mounting pipe holes are formed in the heat exchange sheet body at intervals, the heat exchange sheet body is provided with an inflow end and an outflow end, and a first flanging hole is formed between the two mounting pipe holes in the outermost side; the first flow guide turnups obliquely extend in the direction close to the outflow end from the first ends to the second ends in the direction towards the center of the heat exchange piece body, the first ends are located on the downstream portions of the installation pipe holes, the second ends are located on the downstream portions of the adjacent first turnup holes, and overflowing channels are formed between the outmost installation pipe holes and the first turnup holes. A first flow guide channel is arranged between the first flow guide flange and the mounting pipe hole, a second flow guide channel is arranged between the first flow guide flange and the first flange hole, the flow passing channel is communicated with the first flow guide channel and the second flow guide channel, and the outlet width of the first flow guide channel is larger than that of the second flow guide channel. The heat exchange fin can improve the heat exchange efficiency, and meanwhile the temperature of the two ends of the heat exchange fin in the length direction is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of water heaters, in particular to a heat exchange plate, a heat exchanger and a gas water heater. Background Art

[0002] The heat exchanger, also known as the heat exchanger, is a key component of a gas water heater that transfers the high-temperature flue gas from combustion to the flowing water for heat exchange to achieve the heating of the water temperature. A common water heater heat exchanger includes a number of stacked heat exchange plates, and the heat exchange plates are provided with heat exchange holes for the heat exchange tubes to pass through.

[0003] In order to pursue higher heat exchange efficiency, existing heat exchangers usually need to arrange various forms of turbulent structures around each heat exchange hole to increase the residence time of the flue gas, which causes the temperature at both ends of the heat exchanger in the length direction to be too high, and eventually the temperature of the water heater shell is too high to scald the user. The usual measure to solve this problem is to reduce the turbulent structure near the two ends of the heat exchanger in the length direction, but this will make the flue gas flow rate at both ends of the heat exchanger in the length direction faster, causing the high-temperature flue gas to lose quickly, reducing the overall heat exchange efficiency of the heat exchanger. Utility Model Content

[0004] The first technical problem solved by the utility model is to provide a heat exchange plate, which can improve the heat exchange efficiency and reduce the temperature at both ends of the heat exchange plate in the length direction.

[0005] The second technical problem solved by the present invention is to provide a heat exchanger which can improve the heat exchange efficiency and reduce the temperature at both ends of the heat exchange plate in the length direction.

[0006] The third technical problem solved by the utility model is to provide a gas water heater, which can improve the heat exchange efficiency and reduce the temperature at both ends of the heat exchange plate in the length direction.

[0007] The first technical problem mentioned above is solved by the following technical solution:

[0008] A heat exchange plate is provided, comprising:

[0009] A heat exchanger body, wherein the heat exchanger body is provided with a plurality of through-going mounting tube holes at intervals along a first direction, wherein the mounting tube holes are used to pass heat exchange tubes, and along a second direction, the heat exchanger body has an inflow end and an outflow end, and a first flange hole is provided between the two outermost mounting tube holes; the second direction is a flue gas flow direction, and the first direction is parallel to the heat exchanger body and perpendicular to the second direction;

[0010] A first guide flange, the first guide flange is arranged on the heat exchange plate body, the first guide flange extends obliquely from the first end to the second end along the direction toward the center of the heat exchange plate body toward the outflow end, the first end is located downstream of the outermost mounting tube hole and the second end is located downstream of the adjacent first flange hole, a flow passage for smoke to pass through is formed between the outermost mounting tube hole and the adjacent first flange hole, a first guide channel is formed between the first guide flange and the mounting tube hole, a second guide channel is formed between the first guide flange and the first flange hole, the flow passage is connected with the first guide channel and the second guide channel, and the outlet width of the first guide channel is greater than the outlet width of the second guide channel.

[0011] Compared with the background technology, the heat exchanger of the utility model has the following beneficial effects: when the smoke passes through the heat exchanger, it flows from the inlet end to the outlet end, the first flange hole is located between the two outermost mounting tube holes, and is used to disturb the smoke flowing through, and a flow passage for the smoke to pass through is formed between the first flange hole and the outermost mounting tube hole, and the flow passage is connected with the first guide channel and the second guide channel on the lower side of the first guide flange, so that when the smoke passes through the flow passage, due to the inclined guide effect of the first guide flange, most of the smoke is guided from the second guide channel to the second end, so that most of the smoke is brought closer to and gathered in the middle of the heat exchanger body, A small portion of the flue gas will be guided from the first guide channel to the first end. Since the outlet width of the first guide channel is greater than the outlet width of the second guide channel, most of the flue gas flowing to the second guide channel will stay longer, extending the residence time of the flue gas at the second end, thereby improving the heat exchange efficiency of the flue gas in the middle of the heat exchanger fin; the small portion of the flue gas flowing to the first guide channel can pass through the first end more smoothly, thereby reducing the temperature at both ends of the heat exchanger fin in the length direction, and at the same time will not form a large temperature difference with the middle area to cause uneven cold and heat and affect the life of the heat exchanger, thereby achieving a balance between improving the heat exchange efficiency and reducing the temperature at both ends of the heat exchanger fin in the length direction.

[0012] In one embodiment, the first guide flange has an inclination angle of 5° to 20° relative to the first direction; and / or,

[0013] The top edge of the first flow guiding flange is parallel to the heat exchange plate body.

[0014] In one of the embodiments, a spoiler convex hull is provided at the intersection of the flow passage, the first flow guiding passage and the second flow guiding passage.

[0015] In one embodiment, the distance between the center of the spoiler convex hull and the outlet of the first guide channel in the first direction is L1, and the distance between the center of the spoiler convex hull and the outlet of the second guide channel in the first direction is L2, and L1<L2.

[0016] In one embodiment, a heat exchange flange is provided around the edge of the mounting tube hole, a positioning edge turned outward away from the center of the mounting tube hole is provided on the top of the heat exchange flange, and a terminal end of the positioning edge is inclined away from the heat exchange plate body;

[0017] And / or, a heat exchange flange is arranged around the edge of the mounting tube hole, and a spoiler edge turned outward away from the center of the mounting tube hole is arranged on the top of the heat exchange flange.

[0018] In one embodiment, a plurality of positioning edges and a plurality of spoiler edges are staggeredly arranged on the top of the heat exchange flange along the circumferential direction;

[0019] And / or, the spoiler edge is parallel to the heat exchange plate body, and the distance between the spoiler edge and the heat exchange plate body is d1, the distance between the end of the positioning edge and the heat exchange plate body is d2, and d2-d1=0.5mm~1mm.

[0020] In one embodiment, the inflow end of the heat exchanger body is provided with a second guide flange, the second guide flange is located upstream of the first flange hole, and the second guide flange is used to guide the smoke to flow toward the mounting tube holes on both adjacent sides; and / or,

[0021] The mounting tube holes are provided with a positive even number, the first surface of the heat exchange fin body is provided with a first V-shaped guide edge, the tip of the first V-shaped guide edge faces the inflow end of the heat exchange fin body, the first V-shaped guide edge is located in the middle of the heat exchange fin body and between two adjacent mounting tube holes; and / or,

[0022] The first guide flange is arranged downstream of the two outermost mounting pipe holes, and the second V-shaped guide edge is arranged downstream of the remaining mounting pipe holes. The tip of the second V-shaped guide edge is provided with a guide notch, and the guide notch is opposite to the center of the mounting pipe hole in the second direction.

[0023] In one embodiment, the heat exchanger body has a first contour line set at the inlet end and a second contour line set at the outlet end, and the first contour line and the second contour line at least partially match each other, so that the first contour line of one heat exchanger can partially fit with the second contour line of another heat exchanger arranged side by side along the second direction.

[0024] The above second technical problem is solved by the following technical solution:

[0025] A heat exchanger is provided, comprising the above-mentioned heat exchange fins, wherein a plurality of the heat exchange fins are arranged at intervals, and the heat exchanger further comprises heat exchange tubes, which are sequentially passed through the mounting tube holes of the plurality of the heat exchange fins.

[0026] Compared with the background technology, the heat exchanger described in the utility model has the following beneficial effects: the heat exchanger is connected with the first guide channel and the second guide channel on the lower side of the first guide flange through the above-mentioned heat exchange plate, and the flow channel formed between the first flange hole and the outermost mounting tube hole is connected. After the flue gas passes through the flow channel, under the inclined guiding action of the first guide flange, most of the flue gas is brought closer and gathered to the middle of the heat exchange plate body through the second guide channel, and a small part of the flue gas is guided from the first guide channel to the first end. Moreover, most of the flue gas flowing to the second guide channel has a longer residence time, and the small part of the flue gas flowing to the first guide channel passes through the first end more smoothly, so that the temperature of the heat exchange plate at both ends in the length direction is reduced, and at the same time, a large temperature difference will not be formed with the middle area, and uneven cold and heat will occur to affect the life of the heat exchanger. The temperature uniformity of the heat exchange plate is good, and the heat exchange efficiency of the heat exchanger is improved.

[0027] The third technical problem mentioned above is solved by the following technical solution:

[0028] Provided is a gas water heater, comprising the above-mentioned heat exchanger.

[0029] Compared with the background technology, the gas water heater described in the utility model has the following beneficial effects: the gas water heater guides most of the flue gas to the middle of the heat exchanger body through the above-mentioned heat exchanger, gathers and prolongs the residence time of the flue gas at the second end, and at the same time guides a small part of the flue gas to pass through the first end more smoothly, thereby improving the heat exchange efficiency of the heat exchanger and reducing the temperature at both ends of the length direction of the heat exchanger, so that the gas water heater can achieve the effect of improving the heat exchange efficiency and reducing the surface shell temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic diagram of the structure of the heat exchange plate provided in an embodiment of the utility model;

[0031] Figure 2 A top view of the structure of the heat exchange plate provided in the embodiment of the utility model;

[0032] Figure 3 A structural cross-sectional view of a heat exchanger provided in an embodiment of the utility model;

[0033] Figure 4 for Figure 3 A partial enlarged schematic diagram of part A;

[0034] Figure 5 A schematic diagram of the processing technology of multiple heat exchange plates provided in an embodiment of the utility model.

[0035] Description of labels:

[0036] 1. Heat exchanger body; 10. First surface; 11. Mounting tube hole; 12. First flange hole; 13. Flow passage; 14. Flow spoiler convex hull; 15. Heat exchange flange; 151. Positioning edge; 152. Flow spoiler edge; 16. Second flow guide flange; 17. First V-shaped flow guide edge; 18. Second V-shaped flow guide edge; 181. Flow guide notch; 19. Second flange hole;

[0037] 2. first flow guiding flange; 21. first flow guiding channel; 22. second flow guiding channel; 23. top edge;

[0038] 101, inflow end; 102, outflow end; 103, first contour line; 104, second contour line. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0040] In the description of the present application, it should be understood that the terms "upper", "lower", "vertical", "horizontal", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0041] The terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0042] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0043] like Figure 1 As shown, the embodiment of the utility model first provides a heat exchange plate, which includes a heat exchange plate body 1 and a first guide flange 2. Along the flow direction of the smoke, the heat exchange plate body 1 has an inlet end 101 and an outlet end 102. The smoke enters the heat exchange plate body 1 from the inlet end 101, flows on the heat exchange plate body 1, and finally flows out from the outlet end 102. The heat exchange plate body 1 is provided with a plurality of through-going mounting tube holes 11, and the mounting tube holes 11 are used to pass heat exchange tubes (not shown in the figure). Fluid flows in the heat exchange tube, and the fluid with a lower temperature enters from one end of the heat exchange tube and flows out from the other end of the heat exchange tube after heat exchange and temperature rise. Therefore, on the heat exchange plate body 1, the temperature of the heat exchange tube at the water outlet end is higher. For ease of explanation, in this application, the direction parallel to the heat exchange plate body 1 and perpendicular to the smoke flow direction is defined as the first direction, and the smoke flow direction is defined as the second direction.

[0044] Multiple installation tube holes 11 are arranged at intervals along the first direction, and the heat exchange tubes in the multiple installation tube holes 11 are located in the same horizontal plane. Therefore, when the flue gas enters the heat exchange plate body 1 from the inlet end 101, it will contact all the heat exchange tubes at the same time, ensuring the uniformity of the distribution of the flue gas on the heat exchange plate body 1. The overall temperature rise of the heat exchange plate body 1 is uniform, avoiding the uneven temperature of the heat exchange plate body 1 superimposed on the heat exchange tube at the water outlet end with a higher temperature. As shown in the attached figure, the heat exchange plate has a total of 4 installation tube holes 11, and the number of installation tube holes 11 is only for illustration; in other embodiments, the heat exchange plate can be provided with other numbers of installation tube holes 11.

[0045] When the flue gas passes through the heat exchange plate, it will flow from the inlet end 101 to the outlet end 102. The first flange hole 12 is located between the two outermost mounting tube holes 11, which is used to disturb the flue gas flowing through. A flow passage 13 for the flue gas to pass through is formed between the first flange hole 12 and the outermost mounting tube hole 11, and the flow passage 13 is connected to the first guide channel 21 and the second guide channel 22 at the lower side of the first guide flange 2. In this way, when the flue gas passes through the flow passage 13, due to the inclined guide effect of the first guide flange 2, most of the flue gas is guided from the second guide channel 22 to the second end, so that most of the flue gas is close to and gathered in the middle of the heat exchange plate body 1, and a small part of the flue gas is discharged. It will be guided from the first guide channel 21 to the first end. Since the outlet width of the first guide channel 21 is greater than the outlet width of the second guide channel 22, most of the flue gas flowing to the second guide channel 22 will stay longer, extending the residence time of the flue gas at the second end, thereby improving the heat exchange efficiency of the flue gas in the middle of the heat exchanger plate; a small portion of the flue gas flowing to the first guide channel 21 can pass through the first end more smoothly, thereby reducing the temperature at both ends of the heat exchanger plate in the length direction, and at the same time will not form a large temperature difference with the middle area to cause uneven cold and heat and affect the life of the heat exchanger, thereby achieving a balance between improving the heat exchange efficiency and reducing the temperature at both ends of the heat exchanger plate in the length direction.

[0046] like Figure 2 As shown, the first guide flange 2 extends from the first end to the second end along the direction toward the center of the heat exchanger body 1 toward the outflow end 102, guiding the smoke to concentrate in the middle of the heat exchanger body 1, thereby improving the uniformity of smoke distribution. Moreover, the outlet width of the first guide channel 21 is greater than the outlet width of the second guide channel 22, as shown in FIG. Figure 2 As shown in the figure, H1 is the outlet width of the first guide channel 21, that is, the minimum distance between one end of the first guide flange 2 and the edge of the mounting tube hole 11; H2 is the outlet width of the second guide channel 22, that is, the minimum distance between the other end of the first guide flange 2 and the first flange hole 12. In this way, the smoke exhaust resistance at the outlet of the first guide channel 21 is small, and the flow rate of the smoke in the first guide channel 21 is fast, which improves the heat exchange efficiency; the smoke exhaust resistance at the outlet of the second guide channel 22 is slightly larger, which can reduce the flow rate of the smoke, so that the smoke can fully exchange heat in the middle of the heat exchange plate body 1, and further improve the uniformity of the smoke distribution on the heat exchange plate body 1.

[0047] Specifically, relative to the first direction, the inclination angle of the first flow guide flange 2 is 5° to 20°. Figure 2 As shown in , the angle α is the inclination angle of the first guide flange 2. The inclination angle within this range enables the first guide flange 2 to effectively guide the smoke while reducing the resistance to the smoke.

[0048] Since the heat exchanger fins are parallel to each other and spaced apart when stacked, in order to reduce the overall occupied height of the heat exchanger fins and ensure a constant spacing between adjacent heat exchanger fins, the top edge 23 of the first flow guide flange 2 is parallel to the heat exchanger fin body 1. In order to improve the processing convenience of the first flow guide flange 2, the first flow guide flange 2 is formed by cutting a hole on the heat exchanger fin body 1 and bending the sheet metal. The shape of the first flow guide flange 2 can be a rectangle, a parallelogram, a trapezoid, etc., as long as the top edge 23 of the first flow guide flange 2 is parallel to the heat exchanger fin body 1.

[0049] In one embodiment, along the second direction, the projections of the first flange hole 12 and the mounting tube hole 11 in the first direction cover the projections of the first guide flange 2 in the first direction, that is, in the first direction, the length of the first guide flange 2 does not exceed the area of ​​the first flange hole 12 and the mounting tube hole 11, thereby avoiding the excessively long first guide flange 2 from forming a large resistance to the smoke.

[0050] In one embodiment, a spoiler convex hull 14 is provided at the intersection of the flow passage 13, the first flow guide passage 21, and the second flow guide passage 22. The spoiler convex hull 14 can change the boundary layer of the smoke and guide the smoke to flow to the first flow guide passage 21 and the second flow guide passage 22. At the same time, the spoiler convex hull 14 also increases the heat exchange area of ​​the heat exchange plate and improves the heat exchange efficiency of the heat exchange plate. Furthermore, in order to make the smoke more concentrated around the mounting tube hole 11, the distance between the center of the spoiler bulge 14 and the outlet of the first guide channel 21 in the first direction is L1, and the distance between the center of the spoiler bulge 14 and the outlet of the second guide channel 22 in the first direction is L2, L1<L2, that is, the distance between the center of the spoiler bulge 14 and the outlet of the first guide channel 21 is smaller than the distance between the center of the spoiler bulge 14 and the outlet of the second guide channel 22, and the spoiler bulge 14 is closer to the first end of the first guide flange 2, and the first end of the first guide flange 2 refers to the end of the first guide flange 2 away from the center of the heat exchanger body 1.

[0051] In one embodiment, a heat exchange flange 15 is provided around the edge of the installation tube hole 11. The heat exchange flange 15 can be mounted on the outside of the heat exchange tube to increase the heat exchange area of ​​the heat exchange tube and improve the stability of the installation of the heat exchange tube. A positioning edge 151 is provided on the top of the heat exchange flange 15, which is turned outward away from the center of the installation tube hole 11. Figure 4 As shown. The positioning edge 151 is used to ensure that the spacing between the heat exchanger plates is uniform when stacking, so as to avoid the unbalanced resistance between the heat exchanger plates and affect the normal discharge of flue gas. In the direction perpendicular to the heat exchanger plate body 1, the end of the positioning edge 151 is inclined away from the heat exchanger plate body 1, so the positioning edge 151 is stackable. When the positioning edge 151 is stacked to be parallel to the heat exchanger plate body 1, the spacing between the heat exchanger plates can be uniform.

[0052] In one embodiment, a heat exchange flange 15 is provided around the edge of the installation tube hole 11, and a spoiler edge 152 is provided on the top of the heat exchange flange 15, which is turned outward away from the center of the installation tube hole 11. Figure 4 The spoiler edge 152 can change the boundary layer of the flue gas around the heat exchange tube, reduce the flow velocity of the flue gas, thereby fully exchanging heat with the heat exchange tube and improving the heat exchange efficiency.

[0053] In one embodiment, if Figure 3 and Figure 4 As shown, the top of the heat exchange flange 15 is staggered with multiple positioning edges 151 and multiple spoiler edges 152 along the circumferential direction. The multiple positioning edges 151 are arranged at intervals around the center of the mounting pipe hole 11. The spoiler edge 152 extends along the circumference of the heat exchange flange 15, and the spoiler edge 152 is arranged between two adjacent positioning edges 151 to avoid mutual stress influence.

[0054] Furthermore, the spoiler edge 152 is parallel to the heat exchanger body 1, the distance between the end of the positioning edge 151 and the heat exchanger body 1 is d2, and the distance between the spoiler edge 152 and the heat exchanger body 1 is d1, d2-d1=0.5mm~1mm, that is, compared with the spoiler edge 152, the end of the positioning edge 151 is slightly farther from the heat exchanger body 1. The distance between the positioning edge 151 and the spoiler edge 152 is within this range, which can ensure the uniformity of the heat exchanger spacing when stacking, and does not affect the assembly of the heat exchanger. Optionally, the end size of the positioning edge 151 is slightly smaller, and the overall shape is trapezoidal, which is easy to stack.

[0055] In order to guide the flue gas to flow more concentratedly to the heat exchange tube, the inlet end 101 of the heat exchange plate body 1 is provided with a second guide flange 16, which is located upstream of the first flange hole 12, and is used to guide the flue gas to flow to the adjacent mounting tube holes 11 on both sides. Therefore, the second guide flange 16 not only increases the heat exchange area of ​​the heat exchange plate, but also guides the flue gas to concentrate at the mounting tube holes 11 on both sides of the first flange hole 12, thereby preventing the flue gas from directly passing through between two adjacent mounting tube holes 11.

[0056] In one embodiment, the heat exchanger body 1 is provided with a second flange hole 19. The second flange hole 19 is provided at the outflow end 102 of the heat exchanger body 1. The second flange hole 19 can be provided on both sides of the first flow guide flange 2 according to the spatial position to form a plurality of flow channels. Compared with the first flange hole 12, the second flange hole 19 is smaller in size, which is conducive to properly disturbing the flue gas flowing out of the first flow guide channel 21 and the second flow guide channel 22, thereby improving the balance of the flue gas arrangement.

[0057] In one embodiment, a first V-shaped flow guide edge 17 is disposed on the first surface 10 of the heat exchanger body 1, and the tip of the first V-shaped flow guide edge 17 faces the inflow end 101 of the heat exchanger body 1. When the number of the mounting holes 11 is a positive even number, the first V-shaped flow guide edge 17 is located in the middle of the heat exchanger body 1 and between two adjacent mounting holes 11, as shown in the attached figure. Figure 1 As shown, the heat exchange plate body 1 is provided with four installation tube holes 11, and the first V-shaped guide edge 17 is located between the two middle installation tube holes 11. The first V-shaped guide edge 17 guides the flue gas to concentrate on the heat exchange tubes on both sides to improve the heat exchange efficiency. Similarly, a second guide flange 16 can also be provided upstream of the first V-shaped guide edge 17.

[0058] It should be noted that, in some embodiments, when the number of mounting tube holes 11 is an odd number, the first V-shaped guide edge 17 may not be provided. Instead, the same effect of gathering the flue gas can be achieved by providing first flange holes 12 between adjacent mounting tube holes 11 to guide the flue gas to concentrate on the heat exchange tubes on both sides.

[0059] In one embodiment, a first flow guide flange 2 is provided downstream of the two outermost installation tube holes 11, and a second V-shaped flow guide edge 18 is provided downstream of the remaining installation tube holes 11, and a flow guide notch 181 is provided at the tip of the second V-shaped flow guide edge 18. A flow channel is formed between the second V-shaped flow guide edge 18 and the adjacent first V-shaped flow guide edge 17 or the adjacent second flange hole 19, so that the flue gas after heat exchange is discharged more concentratedly and evenly. The flow resistance at the flow guide notch 181 is small, which guides more flue gas to concentrate at the center of the back of the heat exchange tube, thereby improving the heat exchange efficiency.

[0060] like Figure 5 As shown, in order to better adapt to the manufacturing and production of continuous molds, the heat exchanger body 1 has a first contour line 103 arranged at the inlet end 101 and a second contour line 104 arranged at the outlet end 102. The first contour line 103 and the second contour line 104 are at least partially consistent, so that the first contour line 103 of a heat exchanger can be partially aligned with the second contour line 104 of another heat exchanger arranged side by side along the second direction. Figure 5 As shown, it is a schematic diagram of the processing process of three heat exchanger plates being continuously processed through a mold. When the first contour line 103 and the second contour line 104 are partially coincident, the raw materials of two adjacent heat exchanger plates can be seamlessly connected, which not only increases the strength of the mold feeding, but also makes it less likely for the raw materials to be deformed unnecessarily, thus avoiding affecting the batch production of the mold. It can also simplify the cutting process of the heat exchanger plate body 1 and reduce the waste of raw materials. The shapes of the first contour line 103 and the second contour line 104 include but are not limited to arcs.

[0061] The utility model embodiment also provides a heat exchanger, which includes a plurality of heat exchange plates as described above, the plurality of heat exchange plates are arranged at intervals, and the heat exchanger also includes heat exchange tubes, which are sequentially passed through the mounting tube holes 11 of the plurality of heat exchange plates. The heat exchanger passes through the above-mentioned heat exchange plate, and the flow channel 13 formed between the first flange hole 12 and the outermost mounting tube hole 11 is connected to the first guide channel 21 and the second guide channel 22 on the lower side of the first guide flange 2. After the flue gas passes through the flow channel 13, under the inclined guide action of the first guide flange 2, most of the flue gas is brought closer and gathered to the middle of the heat exchange plate body 1 through the second guide channel 22, and a small part of the flue gas is guided from the first guide channel 21 to the first end. Moreover, most of the flue gas flowing to the second guide channel 22 has a longer residence time, and the small part of the flue gas flowing to the first guide channel 21 passes through the first end more smoothly, so that the temperature of the heat exchange plate at both ends in the length direction is reduced, and at the same time, a large temperature difference is not formed with the middle area, so as to avoid the situation where uneven cold and heat affect the life of the heat exchanger. The temperature uniformity of the heat exchange plate is good, and the heat exchange efficiency of the heat exchanger is improved.

[0062] Finally, the embodiment of the utility model provides a gas water heater, which includes the heat exchanger as described above, and the gas water heater also includes a water inlet pipe and a water outlet pipe, which are respectively connected to the two ends of the heat exchange pipe of the heat exchanger. The heat exchanger guides most of the flue gas to the middle of the heat exchange plate body 1 through the above-mentioned heat exchange plate, gathers and prolongs the retention time of the flue gas at the second end, and guides a small part of the flue gas to pass through the first end more smoothly, thereby improving the heat exchange efficiency of the heat exchanger, and reducing the temperature at both ends of the heat exchange plate in the length direction, so that the gas water heater can achieve the effect of improving the heat exchange efficiency and reducing the shell temperature.

[0063] In the specific contents of the above-mentioned specific implementation methods, the various technical features can be combined in any non-contradictory manner. In order to make the description concise, not all possible combinations of the above-mentioned technical features are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0064] The specific contents of the above specific implementations only express several implementations of the utility model, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A heat exchanger, characterized in that: include: A heat exchange fin body (1), wherein the heat exchange fin body (1) is provided with a plurality of through-going mounting tube holes (11) at intervals along a first direction, the mounting tube holes (11) being used to pass heat exchange tubes, and along a second direction, the heat exchange fin body (1) has an inflow end (101) and an outflow end (102), and a first flange hole (12) is provided between the two outermost mounting tube holes (11); the second direction is a flue gas flow direction, and the first direction is parallel to the heat exchange fin body (1) and perpendicular to the second direction; A first flow-guiding flange (2), the first flow-guiding flange (2) being arranged on the heat exchange fin body (1), the first flow-guiding flange (2) extending obliquely from a first end to a second end along a direction toward the center of the heat exchange fin body (1) toward the outflow end (102), the first end being located downstream of the outermost mounting pipe hole (11) and the second end being located downstream of an adjacent first flange hole (12), the outermost mounting pipe hole (11) and the adjacent first flange hole (12) A flow passage (13) for smoke to pass through is formed between the first flow guide flange (2) and the mounting pipe hole (11), a first flow guide channel (21) is formed between the first flow guide flange (2) and the first flange hole (12), a second flow guide channel (22) is formed between the first flow guide flange (2) and the first flange hole (12), the flow passage (13) is connected to the first flow guide channel (21) and the second flow guide channel (22), and the outlet width of the first flow guide channel (21) is greater than the outlet width of the second flow guide channel (22).

2. The heat exchange plate according to claim 1, characterized in that: The inclination angle of the first guide flange (2) relative to the first direction is 5° to 20°; and / or, The top edge (23) of the first flow-guiding flange (2) is parallel to the heat exchange plate body (1).

3. The heat exchange plate according to claim 1, characterized in that: A spoiler convex hull (14) is provided at the intersection of the flow passage (13), the first flow guiding passage (21) and the second flow guiding passage (22).

4. The heat exchange plate according to claim 3, characterized in that: The distance between the center of the spoiler convex hull (14) and the outlet of the first guide channel (21) in the first direction is L1, and the distance between the center of the spoiler convex hull (14) and the outlet of the second guide channel (22) in the first direction is L2, and L1<L2.

5. The heat exchange plate according to claim 1, characterized in that: The edge of the mounting tube hole (11) is provided with a heat exchange flange (15), the top of the heat exchange flange (15) is provided with a positioning edge (151) turned outward away from the center of the mounting tube hole (11), and the end of the positioning edge (151) is inclined away from the heat exchange plate body (1); And / or, a heat exchange flange (15) is arranged around the edge of the mounting tube hole (11), and a spoiler edge (152) is arranged on the top of the heat exchange flange (15) and is turned outward away from the center of the mounting tube hole (11).

6. The heat exchange plate according to claim 5, characterized in that: The top of the heat exchange flange (15) is staggeredly provided with a plurality of positioning edges (151) and a plurality of spoiler edges (152) along the circumferential direction; And / or, the spoiler edge (152) is parallel to the heat exchange plate body (1), and the distance between the spoiler edge (152) and the heat exchange plate body (1) is d1, and the distance between the end of the positioning edge (151) and the heat exchange plate body (1) is d2, d2-d1=0.5mm~1mm.

7. The heat exchange plate according to any one of claims 1 to 6, characterized in that: The inflow end (101) of the heat exchange plate body (1) is provided with a second flow guiding flange (16), the second flow guiding flange (16) is located upstream of the first flange hole (12), and the second flow guiding flange (16) is used to guide the smoke to flow toward the mounting pipe holes (11) on two adjacent sides; and / or, The mounting tube holes (11) are provided with a positive even number, the first surface (10) of the heat exchange fin body (1) is provided with a first V-shaped flow guide edge (17), the tip of the first V-shaped flow guide edge (17) faces the inflow end (101) of the heat exchange fin body (1), and the first V-shaped flow guide edge (17) is located in the middle of the heat exchange fin body (1) and between two adjacent mounting tube holes (11); and / or, The first flow guide flange (2) is arranged downstream of the two outermost mounting tube holes (11), and the second V-shaped flow guide edge (18) is arranged downstream of the remaining mounting tube holes (11). The tip of the second V-shaped flow guide edge (18) is provided with a flow guide notch (181), and the flow guide notch (181) is directly opposite to the center of the mounting tube hole (11) in the second direction.

8. The heat exchange plate according to any one of claims 1 to 6, characterized in that: The heat exchange fin body (1) has a first contour line (103) arranged at the inlet end (101) and a second contour line (104) arranged at the outlet end (102), and the first contour line (103) and the second contour line (104) at least partially coincide with each other, so that the first contour line (103) of one heat exchange fin can partially coincide with the second contour line (104) of another heat exchange fin arranged side by side along the second direction.

9. A heat exchanger, characterized in that: The heat exchanger comprises a plurality of heat exchange plates as claimed in any one of claims 1 to 8, wherein the plurality of heat exchange plates are arranged at intervals, and the heat exchanger further comprises heat exchange tubes, which are sequentially passed through the mounting tube holes (11) of the plurality of heat exchange plates.

10. A gas water heater, characterized in that: Comprising the heat exchanger as claimed in claim 9.

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