Heat exchange fins and heat exchange device

Abstract

The application relates to a heat exchange fin and a heat exchange device. The heat exchange fin comprises a base plate, at least three rows of heat exchange pipe mounting hole groups arranged along a first direction, each heat exchange pipe mounting hole group comprising at least two heat exchange pipe mounting holes spaced apart on the base plate along a second direction, and a plurality of flow disturbing members arranged on one side of the base plate and extending along the thickness direction of the base plate; a first flow disturbing member is arranged on one side of at least one heat exchange pipe mounting hole in the Nth row of heat exchange pipe mounting hole groups along the second direction and between two adjacent heat exchange pipe mounting holes in the (N-1)th row of heat exchange pipe mounting hole groups and the (N+1)th row of heat exchange pipe mounting hole groups. The flue gas can flow at least partially around at least three heat exchange pipe mounting holes in the three rows of heat exchange pipe mounting hole groups, so that the flue gas can exchange heat with the at least three heat exchange pipes, and the heat exchange effect is better.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat exchange, in particular to a heat exchange fin and a heat exchange device. BACKGROUND

[0002] The existing gas water heater generally adopts a finned heat exchanger for heat exchange. The finned heat exchanger is provided with a plurality of heat exchange pipe mounting holes for mounting heat exchange pipes on the fins. The flue gas passes through the fins and exchanges heat with the heat exchange pipes in the heat exchange pipe mounting holes. The flue gas can easily pass through the area between two adjacent heat exchange pipes, resulting in a short contact time of the flue gas with the heat exchange fins, thereby reducing the heat exchange efficiency of the heat exchange fins. SUMMARY

[0003] Therefore, it is necessary to provide a heat exchange fin and a heat exchange device to solve the problem of short contact time of flue gas with heat exchange fins.

[0004] According to one aspect of the present application, a heat exchange fin is provided, comprising:

[0005] a substrate, which is divided into an air inlet end and an air outlet end according to the flow direction of the pre-installed air flow;

[0006] at least three rows of heat exchange pipe mounting hole groups arranged along a first direction, each of the heat exchange pipe mounting hole groups comprising at least two heat exchange pipe mounting holes spaced apart along a second direction on the substrate; adjacent two heat exchange pipe mounting holes in adjacent two rows of the heat exchange pipe mounting hole groups are arranged in a staggered manner in the second direction, the heat exchange pipe mounting holes are elliptical and the long axis thereof is parallel to the first direction; and

[0007] a plurality of flow disturbing members extending along the thickness direction of the substrate are arranged on one side of the substrate; the flow disturbing members comprise a first flow disturbing member, the first flow disturbing member is located on one side of at least one heat exchange pipe mounting hole in the Nth row of heat exchange pipe mounting hole groups along the second direction and between adjacent two heat exchange pipe mounting holes in the (N-1)th row of heat exchange pipe mounting hole groups and the (N+1)th row of heat exchange pipe mounting hole groups, in the first direction, the end with a larger width of the first flow disturbing member is located upstream of the end with a smaller width, and the (N+1)th row of heat exchange pipe mounting hole groups is located downstream of the Nth row of heat exchange pipe mounting hole groups;

[0008] wherein the first flow disturbing member comprises a first flow disturbing portion, the first flow disturbing portion has a first flow disturbing segment and a second flow disturbing segment arranged in sequence along the first direction, and a flow disturbing connecting segment coupled between the first flow disturbing segment and the second flow disturbing segment; compared with the first flow disturbing segment and the second flow disturbing segment, the flow disturbing connecting segment has the smallest distance to the long axis of the adjacent heat exchange pipe mounting hole;

[0009] The spoiler further comprises a second spoiler arranged between two adjacent heat exchange pipe mounting holes in the N+1th row of heat exchange pipe mounting holes;

[0010] The first direction is a direction from the air inlet end to the air outlet end, and the second direction is perpendicular to the first direction and parallel to the substrate;

[0011] N is a positive integer greater than or equal to 2.

[0012] In one embodiment, the first spoiler is pear-shaped, and a middle portion of the first spoiler forms a pear-shaped channel, and two sides of the pear-shaped channel are respectively flanged to form the first spoiler portion;

[0013] The pear-shaped channel has a first opening and a second opening arranged opposite to each other along the first direction.

[0014] In one embodiment, in the first direction, the first opening is located upstream of the second opening, and the size of the first opening is greater than the size of the second opening.

[0015] In one embodiment, the size of the second opening is not greater than one fourth of the minor axis size of the heat exchange pipe mounting hole.

[0016] In one embodiment, the spoiler connecting section has a first position point closer to the adjacent heat exchange pipe mounting hole along the second direction.

[0017] A virtual extension line extending from the first position point to the adjacent heat exchange pipe mounting hole along the second direction is defined as a first virtual extension line.

[0018] A virtual extension line extending through the center of the heat exchange pipe mounting hole along the second direction is defined as a second virtual extension line.

[0019] The distance between the first virtual extension line and the second virtual extension line along the first direction is not greater than a preset distance value.

[0020] In one embodiment, the second spoiler is arranged at the air outlet end of the substrate.

[0021] The second spoiler has an upstream face facing the airflow, and a guide face connected to the upstream face, so that the airflow flowing to the air outlet end at least partially contacts the upstream face and flows out of the air outlet end of the substrate by the guidance of the guide face.

[0022] In one embodiment, the second spoiler is a U-shaped flange, and the substrate is provided with an air hole located on the upstream side of the U-shaped flange; and / or

[0023] The second spoiler is a V-shaped flange.

[0024] In one embodiment, the spoiler further comprises an elliptical spoiler.

[0025] The heat exchange tube mounting hole group in the odd-numbered row comprises M heat exchange tube mounting holes, and the heat exchange tube mounting hole group in the even-numbered row comprises M-1 heat exchange tube mounting holes.

[0026] The elliptical spoiler is located on both sides of the heat exchange tube mounting hole group in the even-numbered row.

[0027] Two ends of the elliptical spoiler along the first direction are provided with oppositely arranged third openings.

[0028] In one embodiment, two ends of the substrate along the second direction are provided with heat dissipation protrusions extending along the thickness direction of the substrate; the heat dissipation protrusions comprise a first part corresponding to the heat exchange tube mounting hole near the end of the substrate in the heat exchange tube mounting hole group in the odd-numbered row, and a second part corresponding to the elliptical spoiler.

[0029] The second part is recessed inwardly in the second direction compared to the first part.

[0030] According to another aspect of the present application, a heat exchange device is provided, comprising:

[0031] A heat exchange fin group comprising a plurality of heat exchange fins arranged side by side; and

[0032] A heat exchange tube group comprising a plurality of heat exchange tubes, the heat exchange tubes passing through the corresponding heat exchange tube mounting holes of each heat exchange fin, so that the heat exchange tubes are connected to the heat exchange fins.

[0033] The high-temperature flue gas passes through the base plate from bottom to top, passes through the heat exchange tube of at least one heat exchange tube mounting hole in the N-1th row of heat exchange tube mounting hole groups, then passes through the first turbulence member and the heat exchange tube mounting hole in the Nth row of heat exchange tube mounting hole groups, and then passes through the heat exchange tube of at least one heat exchange tube mounting hole in the N+1th row of heat exchange tube mounting hole groups, so that the flue gas can flow around at least three heat exchange tube mounting holes in the three rows of heat exchange tube mounting hole groups, and the flue gas can exchange heat with at least three heat exchange tubes, so that the heat exchange effect is better. Because the end of the first turbulence member with a larger width is located upstream of the end with a smaller width, the flue gas shrinks along the airflow direction towards the N+1th row of heat exchange tube mounting hole groups, which is more conducive to making the airflow close to the pipe wall of the heat exchange tube in the heat exchange tube mounting hole in the Nth row of heat exchange tube mounting hole groups, and the heat exchange effect is better. In addition, the distance from the turbulence connecting section to the long axis of the adjacent heat exchange tube mounting hole is the smallest, which can make the flow rate of the flue gas entering the turbulence member and the adjacent heat exchange tube mounting hole first increase and then decrease, quickly guide the flue gas to the turbulence connecting section and the adjacent heat exchange tube mounting hole and stay for a period of time, so that the flue gas has sufficient time to exchange heat with the heat exchange tube in the heat exchange tube mounting hole in the Nth row of heat exchange tube mounting hole groups, and the heat exchange efficiency of the heat exchanger can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 A perspective view of the heat exchange fin in an embodiment of the present application is shown.

[0035] Figure 2 A front view of Figure 1 is shown.

[0036] Figure 3 A structural view of the heat exchange fin in another embodiment of the present application is shown.

[0037] Figure 4 A structural view of the heat exchanger in an embodiment of the present application is shown.

[0038] Figure 5 A structural view of the heat exchange tube in an embodiment of the present application is shown.

[0039] In the figure: 10, heat exchanger; 110, heat exchange fin; 111, base plate; 1111, air inlet end; 1112, air outlet end; 112, heat exchange tube mounting hole; 1121, hole flange; 113, first turbulence member; 1130, first turbulence part; 1131, first turbulence section; 1132, second turbulence section; 1133, turbulence connecting section; 1134, pear-shaped channel; 1135, first opening; 1136, second opening; 114, elliptical turbulence member; 1140, second turbulence part; 1141, third opening; 1151, first flow guide channel; 116, heat dissipation protruding member; 1161, first part; 1162, second part; 1163, first extension section; 1164, second extension section; 1165, smoke inlet end flow guide channel; 1166, smoke outlet end flow guide channel; 117, second turbulence member; 1171, first flow guide outlet channel; 1172, second flow guide outlet channel; 1173, flow encountering surface; 1174, flow guiding surface; 118, air vent; 1191, first virtual extension line; 1192, second virtual extension line; 121, water inlet pipe; 122, water outlet pipe; 131, first water collecting box; 132, second water collecting box; 141, first conduit box; 142, second conduit box; 151, first frame; 152, second frame; 161, first gland; 162, second gland; 170, heat exchange tube group; 171, heat exchange tube; 1711, turbulence fin. DETAILED DESCRIPTION

[0040] In order to make the above objectives, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are described in detail below. In the following description, a large number of specific details are set forth in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, therefore the present application is not limited by the specific embodiments disclosed below.

[0041] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation of the present application.

[0042] In addition, the terms "first", "second", etc. are used herein only to describe different instances, and are not used to denote or imply relative importance or a number of indications of the technical features indicated. Thus, the technical features defined with "first", "second", etc. can explicitly or implicitly include at least one of the technical features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0043] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0044] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0045] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there can be a middle element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and are not the only implementation.

[0046] Figure 1 A perspective view of the heat exchange fin in an embodiment of the present application is shown, Figure 2 A front view of Figure 1 is shown.

[0047] Referring to Figure 1 and Figure 2 , an embodiment of the present application provides a heat exchange fin 110, which includes a substrate 111, at least three rows of heat exchange pipe mounting hole groups arranged in a first direction, and a plurality of flow disturbing members.

[0048] Each heat exchange pipe mounting hole group comprises at least two heat exchange pipe mounting holes 112 spaced apart along the second direction on the base plate 111. One heat exchange pipe 171 can be mounted on each heat exchange pipe mounting hole 112, so that the heat exchange pipe 171 is connected to the heat exchange fin 110 by penetrating the corresponding heat exchange pipe mounting hole 112. Specifically, in the embodiment shown in Figure 2 The base plate 111 is divided into an air inlet end 1111 and an air outlet end 1112 according to the flow direction of the pre-installed air flow. The first direction is from the air inlet end 1111 to the air outlet end 1112. The second direction is perpendicular to the first direction and parallel to the base plate 111. That is, the first direction is the up-down direction, and the second direction is the left-right direction.

[0049] The two adjacent heat exchange pipe mounting holes 112 in the two adjacent rows of heat exchange pipe mounting hole groups are arranged in the second direction. When a plurality of heat exchange pipes 171 are correspondingly mounted on the plurality of heat exchange pipe mounting holes 112, the plurality of heat exchange pipes 171 are all mounted on the heat exchange fin 110, and the arrangement of the plurality of heat exchange pipes 171 is more compact. The heat exchange pipe mounting hole 112 is in the shape of an ellipse, and the long axis of the heat exchange pipe mounting hole 112 is substantially parallel to the first direction, which is beneficial to the flow of the air flow from bottom to top along the pipe wall of the heat exchange pipe 171 on the heat exchange pipe mounting hole 112.

[0050] Optionally, the base plate 111 is provided with a plurality of hole flanges 1121 extending along the thickness direction of the base plate 111. Each hole flange 1121 is arranged around the heat exchange pipe mounting hole 112, which facilitates the mounting of the corresponding heat exchange pipe 171 on the heat exchange pipe mounting hole 112.

[0051] Optionally, the hole spacing between the two adjacent heat exchange pipe mounting holes 112 is less than the long radius of the elliptical hole, and correspondingly, the pipe spacing between the two adjacent heat exchange pipes 171 is also less than the long radius of the elliptical hole, so that the overall structure of the heat exchange fin 110 is more compact, and the arrangement of the plurality of heat exchange pipes 171 is more compact.

[0052] Please refer to Figure 1 and Figure 2 Optionally, the base plate 111 is provided with a plurality of flow disturbing members extending along the thickness direction of the base plate 111. The flow disturbing member comprises a first flow disturbing member 113. The first flow disturbing member 113 is located on one side of at least one heat exchange pipe mounting hole 112 in the Nth row of heat exchange pipe mounting hole groups along the second direction, and is located between the two adjacent heat exchange pipe mounting holes 112 in the N-1th row of heat exchange pipe mounting hole groups and the N+1th row of heat exchange pipe mounting hole groups. It can be understood that the three heat exchange pipe mounting holes 112 (which are respectively located in three rows of heat exchange pipe mounting hole groups) are arranged around the first flow disturbing member 113.

[0053] The N+1th row of heat exchange pipe mounting hole groups is located downstream of the Nth row of heat exchange pipe mounting hole groups. The first turbulence member 113 and the heat exchange pipe 171 pipe wall on the heat exchange pipe mounting hole 112 of the Nth row of heat exchange pipe mounting hole groups define a first flow guide channel 1151 that guides the airflow to flow towards the air outlet end 1112. The first turbulence member 113 has a wider end upstream of a narrower end, so that the flue gas flowing into the first flow guide channel 1151 shrinks along the airflow direction towards the N+1th row of heat exchange pipe mounting hole groups, which is more conducive to making the airflow close to the pipe wall of the heat exchange pipe 171 on the heat exchange pipe mounting hole 112 of the Nth row of heat exchange pipe mounting hole groups, and the heat exchange effect is better. For the heat exchange pipe 171 at the N+1th row of heat exchange pipe mounting hole groups, there is also more opportunity to contact more airflow, and the heat exchange effect is better.

[0054] The first turbulence member 113 includes a first turbulence portion 1130, and the first flow guide channel 1151 is formed between the first turbulence portion 1130 and the heat exchange pipe 171 pipe wall on the heat exchange pipe mounting hole 112 adjacent in the second direction. When the heat exchange fin 110 is in use, the first heat exchange fluid passing through the heat exchange fin 110 exchanges heat with the second heat exchange fluid passing through the heat exchange pipe 171. Specifically, the first heat exchange fluid is high-temperature flue gas, and the second heat exchange fluid is cold water. The high-temperature flue gas passes through the substrate 111 from bottom to top, passes through the heat exchange pipe 171 at at least one heat exchange pipe mounting hole 112 in the N-1th row of heat exchange pipe mounting hole groups, passes through the first flow guide channel 1151 between the first turbulence member 113 and a heat exchange pipe mounting hole 112 in the Nth row of heat exchange pipe mounting hole groups, and then passes through at least one heat exchange pipe mounting hole 112 in the N+1th row of heat exchange pipe mounting hole groups. This allows the flue gas to flow at least partially around at least three heat exchange pipe mounting holes 112 in the three rows of heat exchange pipe mounting hole groups, so that the flue gas exchanges heat with at least three heat exchange pipes 171, and the heat exchange effect is better.

[0055] Wherein N is a positive integer greater than or equal to 2, and N can be 2, 3, 4, etc.

[0056] Specifically, as shown in the embodiments of Figure 1 and Figure 2 N is equal to 2, and the three rows of heat exchange pipe mounting hole groups are counted from bottom to top. The high-temperature flue gas passes through the substrate 111 from bottom to top, passes through the heat exchange pipe 171 at at least one heat exchange pipe mounting hole 112 in the 1st row of heat exchange pipe mounting hole groups, passes through the first flow guide channel 1151 between the first turbulence member 113 and a heat exchange pipe mounting hole 112 in the 2nd row of heat exchange pipe mounting hole groups, and then passes through at least one heat exchange pipe mounting hole 112 in the 3rd row of heat exchange pipe mounting hole groups. This allows the flue gas to flow at least partially around at least three heat exchange pipe mounting holes 112 in the three rows of heat exchange pipe mounting hole groups, so that the flue gas exchanges heat with at least three heat exchange pipes 171, and the heat exchange effect is better.

[0057] The first turbulence portion 1130 has a first turbulence section 1131 and a second turbulence section 1132 arranged in sequence along the first direction, and a turbulence connecting section 1133 coupled between the first turbulence section 1131 and the second turbulence section 1132. Compared with the first turbulence section 1131 and the second turbulence section 1132, the turbulence connecting section 1133 is closest to the adjacent heat exchange pipe mounting hole 112 along the long axis, and specifically, as shown in the embodiment Figure 2 In the embodiment shown, the turbulence connecting section 1133 is closer to the adjacent heat exchange pipe mounting hole 112 in the Nth row of heat exchange pipe mounting hole groups in the left-right direction. It can be understood that the first flow guide channel 1151 includes a first converging channel and a first diverging channel connected in sequence from bottom to top, so that the flow rate of flue gas entering between the first turbulence member 113 and the adjacent heat exchange pipe mounting hole 112 first increases and then decreases, which can quickly guide the flue gas into the first flow guide channel 1151 and make it stay in the first flow guide channel 1151 for a sufficient time to exchange heat with the heat exchange pipe 171 at the heat exchange pipe mounting hole 112 in the Nth row of heat exchange pipe mounting hole groups. The structure of the first flow guide channel 1151 can also guide the flue gas to sequentially pass through at least three heat exchange pipe mounting holes 112 in at least three rows of heat exchange pipe mounting hole groups and exchange heat with the heat exchange pipes 171 at the three heat exchange pipe mounting holes 112, respectively, thereby improving the heat exchange efficiency of the heat exchanger 10.

[0058] The turbulence member further includes a second turbulence member 117 arranged between two adjacent heat exchange pipe mounting holes 112 in the N+1th row of heat exchange pipe mounting hole groups. The second turbulence member 117 cooperates with the first turbulence member 113 to guide the airflow to flow at least partially around the heat exchange pipe mounting holes 112 in the N+1th row of heat exchange pipe mounting hole groups, so that the flue gas can exchange heat with the heat exchange pipes 171 at the heat exchange pipe mounting holes 112 in the N+1th row of heat exchange pipe mounting hole groups, thereby improving the heat exchange effect.

[0059] In some embodiments, the first turbulence member 113 is pear-shaped. The first turbulence member 113 of the pear-shaped structure has a bending transition between the first turbulence section 1131 and the second turbulence section 1132, and the first turbulence section 1131 is closer to the air inlet end 1111 of the heat exchange fin 110 than the second turbulence section 1132 in the first direction, and specifically, as shown in the embodiment Figure 1 and Figure 2 In the embodiment shown, the first turbulence section 1131 is closer to the lower end of the heat exchange fin 110 than the second turbulence section 1132 in the up-down direction. The connecting section between the first turbulence section 1131 and the turbulence connecting section 1133 is directed towards the adjacent heat exchange pipe mounting hole 112, so as to better guide the flue gas, make the flue gas flow to the adjacent heat exchange pipe mounting hole 112, and exchange heat with the heat exchange pipe 171 on the heat exchange pipe mounting hole 112 for a long time in the first diverging channel, which is more conducive to improving the heat exchange efficiency of the heat exchanger 10.

[0060] Further, the middle part of the first turbulence member 113 forms a pear-shaped passage 1134, the pear-shaped passage 1134 has a first opening 1135 and a second opening 1136 oppositely arranged along the first direction, and each of the two sides of the pear-shaped passage 1134 is flanged to form a first turbulence part 1130. The flue gas contacting the first turbulence member 113 can be divided into two parts due to the arrangement of the first opening 1135 and the second opening 1136. One part of the flue gas can pass through the first opening 1135 and the second opening 1136 in sequence, and the other part of the flue gas can flow upward along the first flow guide passage 1151. This can avoid the stagnation point of the flue gas at the first turbulence member 113 during the flow to the outlet end 1112, which can cause resistance loss at the stagnation point in the heat transfer theory, and can slow down the flow speed and be not conducive to heat exchange. In this way, the heat exchange effect of the flue gas can be improved to a certain extent.

[0061] Specifically, as shown in the embodiment, Figure 2 It can be understood that, in the embodiment, the first turbulence section 1131 and the second turbulence section 1132 are closer to the central axis of the corresponding pear-shaped passage 1134 in the left-right direction than the turbulence connecting section 1133. The pear-shaped passage 1134 can sequentially include a second expanding passage and a second converging passage which are in communication from bottom to top. The flue gas entering the pear-shaped passage 1134 first enters the second expanding passage to reduce the flow speed, which can help to prolong the residence time of the flue gas, improve the heat exchange time of the flue gas and the heat exchange fins 110, and further improve the heat exchange efficiency of the heat exchange fins 110. Then, the flue gas enters the second converging passage to increase the flow speed, which can help to quickly leave the pear-shaped passage 1134 and avoid forming a stagnation point in the pear-shaped passage 1134 (in the heat transfer theory, a stagnation point can cause resistance loss to slow down the flow speed and be not conducive to heat exchange). This is also conducive to the heat exchange between the flue gas and the heat exchange tube 171 at the heat exchange tube mounting hole 112 in the N+1th row of heat exchange tube mounting hole groups through the second opening 1136 of the pear-shaped passage 1134, and further improves the heat exchange effect of the heat exchange fins 110.

[0062] In some embodiments, the substrate 111 is provided with three rows of heat exchange tube mounting hole groups, and the pear-shaped passage 1134 is located between two adjacent heat exchange tube mounting holes 112 in two adjacent odd rows of heat exchange tube mounting hole groups. The flue gas flows from bottom to top, first passes through an odd row of heat exchange tube mounting hole groups, exchanges heat with the heat exchange tubes 171 on the heat exchange tube mounting holes 112 in the row of heat exchange tube mounting hole groups; enters the pear-shaped passage 1134 and stays in the pear-shaped passage 1134 for a period of time, and exchanges heat with the heat exchange tubes 171 on the heat exchange tube mounting holes 112 in the even row of heat exchange tube mounting hole groups; the flue gas is guided through the pear-shaped passage 1134, can quickly leave the pear-shaped passage 1134, and based on the structure of the pear-shaped passage 1134, can be sucked to the next odd row of heat exchange tube mounting hole groups under negative pressure, and exchanges heat with the heat exchange tubes 171 on the heat exchange tube mounting holes 112 in the next odd row of heat exchange tube mounting hole groups, which can ensure that the flue gas is fully heat exchanged and can improve the heat exchange efficiency of the heat exchanger 10.

[0063] Further, in the first direction, the first opening 1135 is located upstream of the second opening 1136, and the size of the first opening 1135 is larger than the size of the second opening 1136, that is, compared with the second opening 1136, the first opening 1135 is closer to the gas inlet end 1111 in the first direction, which can better gather the flue gas upstream of the first turbulence piece 113 towards the pear-shaped passage 1134, and is more conducive to gathering the flue gas near the pear-shaped passage 1134 at the heat exchange tube 171 and exchanging heat with the heat exchange tube 171, which can effectively improve the heat exchange effect of the heat exchange fin 110.

[0064] Further, the size of the second opening 1136 is not greater than one fourth of the short axis size of the heat exchange tube mounting hole 112. Specifically, in the embodiment shown in Figure 1 and Figure 2 The long axis of the elliptical hole is substantially parallel to the first direction, and the short axis of the elliptical hole is substantially parallel to the second direction, which is conducive to the flue gas gathered in the pear-shaped passage 1134 flowing towards the pipe wall of the downstream side heat exchange tube 171 without easily spreading everywhere, and better improving the heat exchange effect of the flue gas and the downstream side heat exchange tube 171.

[0065] Further, the turbulence connecting section 1133 has a first position point closer to the adjacent heat exchange tube mounting hole 112 in the second direction, please refer to Figure 2, the first virtual extension line 1191 is defined as a virtual extension line extending from the first position point along the second direction to the adjacent heat exchange pipe mounting hole 112, and the second virtual extension line 1192 is defined as a virtual extension line extending through the center of the heat exchange pipe mounting hole 112 along the second direction, wherein the distance between the first virtual extension line 1191 and the second virtual extension line 1192 along the first direction is not greater than a preset distance value. It can be understood that the first position point of the turbulence connection section 1133 substantially corresponds to the center connecting line of the adjacent two heat exchange pipe mounting holes 112, so that the flue gas gathered in the first guide flow channel 1151 can be better gathered at the upstream portion of the adjacent heat exchange pipe 171, and can flow along the upstream portion of the heat exchange pipe 171 to the downstream portion of the heat exchange pipe 171, so that the heat exchange effect is better.

[0066] Further, the second turbulence member 117 is arranged at the air outlet end 1112 of the base plate 111, please refer to Figure 2 , the second turbulence member 117 has a flow surface 1173 facing the airflow, and a guide surface 1174 connected to the flow surface 1173, so that the airflow flowing to the other side of the base plate 111 at least partially contacts the flow surface 1173, and flows out of the other side of the base plate 111 by means of the guide of the guide surface 1174, which can prolong the residence time of the airflow and further improve the heat exchange efficiency.

[0067] The second turbulence member 117 is arranged between the adjacent two heat exchange pipe mounting holes 112 in the group of heat exchange pipe mounting holes close to the air outlet end 1112. Among them, the second turbulence member 117 and one of the hole flanges 1121 of the adjacent two hole flanges 1121 define a first guide outlet channel 1171; the second turbulence member 117 and the other hole flange 1121 of the adjacent two hole flanges 1121 define a second guide outlet channel 1172. In the embodiment as shown in Figure 1 , the air outlet end 1112 of the base plate 111 is the upper end of the base plate 111. After the flue gas passes through the plurality of heat exchange pipes 171 for heat exchange, the flue gas can exit the heat exchange fin 110 from the air outlet end 1112 of the base plate 111. By arranging the second turbulence member 117, the flue gas can be further guided by the first guide outlet channel 1171 and the second guide outlet channel 1172, and then further heat exchanged with the heat exchange fin 110, which can also ensure that the flue gas is fully heat exchanged with the heat exchange pipes 171 near the first guide outlet channel 1171 and the second guide outlet channel 1172, and further improve the heat exchange effect.

[0068] In some embodiments, please refer to Figure 2The second flow disturbing member 117 is a U-shaped flange. The base plate 111 is provided with a ventilation hole 118 on the upstream side of the U-shaped flange to avoid the contact between the flue gas and the flow surface 1173 to form a stagnation point at the U-shaped flange. At the same time, the ventilation hole 118 also causes the flow between the adjacent two heat exchange fins 110 to improve the heat exchange effect of the plurality of heat exchange fins 110.

[0069] In other embodiments, please refer to Figure 3 The second flow disturbing member 117 is a V-shaped flange. The transition from the U-shaped flange to the V-shaped flange reduces the resistance loss of the flue gas and improves the heat exchange efficiency. The angle of the U-shaped flange and the V-shaped flange can be selected according to the actual situation.

[0070] Through simulation calculation, it is found that the heat exchange efficiency of the U-shaped flange is better than that of the V-shaped flange in the specific application process. This may be because the U-shaped flange has a flow surface 1173 that faces the fluid and tends to be flat, which can increase the heat exchange area between the fluid and the second flow disturbing member 117 and improve the heat exchange effect.

[0071] Specifically, as shown in the embodiment of Figure 2 , the flue gas exchanges heat with the heat exchange pipe 171 at the last row of heat exchange pipe installation hole groups, and then flows upward between the second flow disturbing member 117 and the adjacent hole flange 1121. This can ensure that the flue gas fully exchanges heat with the heat exchange pipe 171 at the hole flange 1121 and fully contacts the second flow disturbing member 117, effectively improving the heat exchange effect of the flue gas. Finally, the flue gas is guided to leave the heat exchange fin 110 through the first flow guiding outlet channel 1171 or the second flow guiding outlet channel 1172. Further, the first flow guiding outlet channel 1171 and the second flow guiding outlet channel 1172 are gradually converging channels. The outlets of the first flow guiding outlet channel 1171 and the second flow guiding outlet channel 1172 form a horn mouth. The flow rate of the flue gas increases at the horn mouth. The flow rate of the flue gas is proportional to the Reynolds coefficient, and the Reynolds coefficient is proportional to the Nusselt coefficient. That is, the Nusselt coefficient gradually increases, and the heat exchange effect is enhanced. In addition, the change in the flow rate of the flue gas also makes the flue gas closely adhere to the wall of the heat exchange pipe, increases the contact area between the flue gas and the heat exchange pipe 171, reduces the convection loss of heat, is beneficial to the heat absorption of the heat exchange pipe 171, and further improves the heat exchange efficiency.

[0072] Furthermore, the heat exchange tube mounting hole groups in odd-numbered rows include M heat exchange tube mounting holes 112, and the heat exchange tube mounting hole groups in even-numbered rows include M-1 heat exchange tube mounting holes 112, where M is a natural number greater than 2. The spoiler also includes elliptical spoilers 114, which are located on both sides of the heat exchange tube mounting hole groups in even-numbered rows. The elliptical spoiler 114 has an elliptical hollow portion formed in the middle, with flanges on both sides of the elliptical hollow portion along the second direction forming second spoiler portions 1140. Oppositely disposed third openings 1141 are defined at both ends of the elliptical spoiler 114 along the first direction. When the flue gas flows from the air inlet end 1111 toward the air outlet end 1112, it will contact the elliptical spoiler 114, which is beneficial for the flue gas to exchange heat in the heat exchange tube 171 at the heat exchange tube mounting hole 112 adjacent to the elliptical spoiler 114. The relatively arranged third opening 1141 can also avoid the flue gas from having a stagnation point at the elliptical spoiler 114 in the process of flowing toward the air outlet end 1112 due to the disturbance of the elliptical spoiler 114, and can also improve the heat exchange effect of the flue gas to a certain extent.

[0073] Please refer again Figure 1 and Figure 2 The first flow guiding channel 1151 is formed between the first flow spoiler 1130 and the adjacent heat exchange tube mounting hole 112 , and the first flow guiding channel 1151 is also formed between the second flow spoiler 1140 and the adjacent heat exchange tube mounting hole 112 .

[0074] Please refer again Figure 1 and Figure 2 The elliptical spoiler 114 is located in the same row as the even-numbered row of heat exchange tube mounting hole groups located between two adjacent odd-numbered row of heat exchange tube mounting hole groups. The elliptical spoiler 114 can be used to improve the heat exchange effect of the even-numbered row of heat exchange tube mounting hole groups, thereby avoiding the occurrence of local high temperature in the even-numbered row of heat exchange tube mounting hole groups due to the small number of heat exchange tube mounting holes 112 in the even-numbered row of heat exchange tube mounting hole groups.

[0075] Further, please refer again to Figure 1 and Figure 2 The first spoiler 113 and the elliptical spoiler 114 are located in the same row as the even-numbered rows of heat exchange tube mounting hole groups, which further avoids the occurrence of local high temperature phenomena at the even-numbered rows of heat exchange tube mounting hole groups. In addition, multiple spoilers are arranged to form a row of spoiler groups, which can contact with more high-temperature flue gas, further improving the heat exchange efficiency of the heat exchange fins 110; and the high-temperature flue gas between each spoiler and the adjacent hole flange 1121 can fully contact with the heat exchange tube 171 on the corresponding heat exchange tube mounting hole 112 for heat exchange, which can further improve the heat exchange efficiency of the heat exchanger 10.

[0076] In some embodiments, the number of groups of heat exchange tube mounting holes is three rows, the number of heat exchange tube mounting holes in the second row of groups of heat exchange tube mounting holes is less, and the first flow disturbing members 113 and the oval flow disturbing members 114 are located in the same row as the second row of groups of heat exchange tube mounting holes. Specifically, M is equal to 4, the second row of groups of heat exchange tube mounting holes includes three heat exchange tube mounting holes 112, and the first and third rows of groups of heat exchange tube mounting holes include four heat exchange tube mounting holes 112. Each first flow disturbing member 113 and each oval flow disturbing member 114 is located between two adjacent heat exchange tube mounting holes 112 in the first and third rows of groups of heat exchange tube mounting holes. Further, the base plate 111 is provided at both ends in the second direction with heat dissipation protruding members 116 extending in the thickness direction of the base plate 111; the heat dissipation protruding members 116 include a first portion 1161 corresponding to the heat exchange tube mounting holes 112 in the odd row of groups of heat exchange tube mounting holes close to the end of the base plate 111, and a second portion 1162 corresponding to the oval flow disturbing members 114, wherein the second portion 1162 is recessed inward in the second direction compared to the first portion 1161. The second portion 1162 can be recessed inward into the group of heat exchange tube mounting holes in the row where the oval flow disturbing member 114 is located, so that the flue gas entering between the heat dissipation protruding member 116 and the oval flow disturbing member 114 enters a converging area, which helps to increase the speed of this part of the flue gas and reduce the residence time of this part of the flue gas, which can further avoid local high temperature at the even row of groups of heat exchange tube mounting holes, save materials, and help to reduce the occupied area of the heat exchange fins 110, and is more conducive to the miniaturization of the heat exchanger 10.

[0077] Further, in the embodiment as shown in Figure 2 , the second portion 1162 is closer to the second row of groups of heat exchange tube mounting holes in the second direction compared to the first portion 1161.

[0078] In some embodiments, the heat dissipation protruding member 116 is a flange of trapezoidal structure.

[0079] Further, the heat dissipation protruding member 116 and the oval flow disturbing member 114 are located on the same side surface of the base plate 111. Please refer again to Figure 1, the number of the first part 1161 is two, two first parts 1161 are connected at two ends of the second part 1162 along the first direction respectively, two first parts 1161 extend along a section away from the second part 1162 along the first direction to form a first extension section 1163 and a second extension section 1164 respectively, the first extension section 1163 and the adjacent hole flange 1121 form a smoke inlet end flow guide channel 1165, the second extension section 1164 and the adjacent hole flange 1121 form a converging smoke outlet end flow guide channel 1166, the smoke from bottom to top can be guided by the smoke inlet end flow guide channel 1165, and then heat exchange with the heat exchange tube 171 near the first extension section 1163, the part of the smoke enters the smoke outlet end flow guide channel 1166, and then heat exchange with the heat exchange tube 171 near the second extension section 1164, and finally quickly leaves the smoke outlet end flow guide channel 1166, avoiding the smoke gathering between the heat dissipation protruding part 116 and the adjacent hole flange 1121 to form a stagnation point (in the heat transfer theory, the stagnation point will produce resistance loss to cause slow flow speed and be not conducive to heat exchange), and avoiding the situation not conducive to heat exchange due to the stagnation point.

[0080] Further, the overall layout of the heat exchange fin 110 is symmetrical with the axis, the structure is compact, the cross-sectional area is appropriate, and the heat exchange efficiency of the heat exchange fin 110 meets the national energy efficiency standard.

[0081] Figure 4 The structure of the heat exchanger in an embodiment of the application is shown.

[0082] Please refer to Figure 4 , the heat exchange device provided by the embodiment of the application comprises a heat exchange fin group and a heat exchange tube group 170. The heat exchange fin group comprises a plurality of heat exchange fins 110 arranged side by side. The heat exchange tube group 170 comprises a plurality of heat exchange tubes 171, the heat exchange tubes 171 pass through the corresponding heat exchange tube mounting holes 112 of each heat exchange fin 110, so that the heat exchange tubes 171 are connected to the heat exchange fins 110, and the heat exchange tubes 171 can be connected to the plurality of heat exchange fins 110 in sequence.

[0083] The heat exchange device can be the heat exchanger 10, or can be a gas water heater comprising the heat exchanger 10.

[0084] Further, please refer to Figure 5 , the heat exchange tube 171 is provided with a spoiler 1711.

[0085] Further, please refer to Figure 4The heat exchanger 10 further comprises an inlet water pipe 121 and an outlet water pipe 122 arranged at opposite sides of the heat exchange pipe group 170, the inlet water pipe 121 is connected to one heat exchange pipe 171 at the head end of the heat exchange pipe group 170, and the outlet water pipe 122 is connected to one heat exchange pipe 171 at the tail end of the heat exchange pipe group 170, cold water flows through the inlet water pipe 121 and a plurality of heat exchange pipes 171 connected in series in turn, and then flows out from the outlet water pipe 122, which can exchange heat with high-temperature flue gas passing through the heat exchange fin group, and the heat exchange effect is good, and the inlet water pipe 121 and the outlet water pipe 122 are distributed at the two sides of the heat exchange pipe group 170, which can ensure the balance of the overall structure of the heat exchanger 10.

[0086] Further, please refer to Figure 4 The heat exchanger 10 further comprises a first frame 151 and a second frame 152 arranged in parallel to the heat exchange pipe 171, and a first gland 161 and a second gland 162 arranged in perpendicular to the heat exchange pipe 171. Specifically, as shown in the embodiment Figure 4 Figure 4 The heat exchange pipe 171 is arranged in the left-right direction, the first frame 151 and the second frame 152 are arranged in the left-right direction, and the first gland 161 and the second gland 162 are arranged in the up-down direction. The first frame 151, the first gland 161, the second frame 152 and the second gland 162 form a containing cavity for partially containing the heat exchange pipe group 170, which helps to keep the heat exchange pipe group 170 clean. In addition, when the heat exchanger 10 is applied in a gas water heater, the top surface of the first gland 161 and the bottom surface of the second gland 162 can make the heat exchanger 10 flatly cooperate with other components of the gas water heater, such as a burner or a smoke collecting cover, which can better avoid the situation of smoke leakage of the gas water heater.

[0087] Further, the first frame 151 is provided with a first through hole for the heat exchange pipe 171 to pass through, which facilitates the heat exchange pipe 171 to be connected to other components such as the first conduit box 141, the first water collecting box 131 and the inlet water pipe 121.

[0088] The second frame 152 is provided with a second through hole for the heat exchange pipe 171 to pass through, which facilitates the heat exchange pipe 171 to be connected to other components such as the second conduit box 142, the second water collecting box 132 and the outlet water pipe 122.

[0089] The gas water heater comprises the heat exchanger 10 described above. The cold water in the heat exchange pipe 171 of the heat exchange pipe group 170 exchanges heat with high-temperature flue gas by means of the heat dissipation fin group, and the heat exchange efficiency is high.

[0090] Further, the first frame 151, the first gland 161, the second frame 152 and the second gland 162 are all made of stainless steel, which is conducive to improving the heat exchange efficiency of the heat exchanger 10.

[0091] Any combination of the technical features in the above-described embodiments can be made, and for the sake of brevity, not all possible combinations are described, however, as long as there is no conflict, any combination of the technical features should be considered within the scope of the present disclosure.

[0092] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the present application. It should be pointed out that, for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A heat exchange fin, characterized in that: include: The base plate (111) is divided into an air inlet end (1111) and an air outlet end (1112) according to the flow direction of the airflow at the pre-installed position; At least three rows of heat exchange tube mounting hole groups are arranged along a first direction, each of the heat exchange tube mounting hole groups comprises at least two heat exchange tube mounting holes (112) spaced apart and distributed on the substrate (111) along a second direction; two adjacent heat exchange tube mounting holes (112) in two adjacent rows of the heat exchange tube mounting hole groups are staggered in the second direction, and the heat exchange tube mounting holes (112) are elliptical and their long axes are parallel to the first direction; and A plurality of spoilers are provided on one side of the substrate (111) and extend along the thickness direction of the substrate (111); the spoilers include a first spoiler (113), the first spoiler (113) being located on one side of at least one heat exchange tube mounting hole (112) in the Nth row of heat exchange tube mounting hole groups along the second direction, and being located between two adjacent heat exchange tube mounting holes (112) in the N-1th row of heat exchange tube mounting hole groups and the N+1th row of heat exchange tube mounting hole groups; in the first direction, the end of the first spoiler (113) with a larger width is located upstream of the end with a smaller width, and the N+1th row of heat exchange tube mounting hole groups is located downstream of the Nth row of heat exchange tube mounting hole groups; N is a positive integer greater than or equal to 2; the first direction is a direction from the air inlet end (1111) to the air outlet end (1112), and the second direction is perpendicular to the first direction and is parallel to the substrate (111); The first spoiler (113) includes a first spoiler portion (1130), the first spoiler portion (1130) having a first spoiler section (1131) and a second spoiler section (1132) sequentially arranged along the first direction, and a spoiler connecting section (1133) coupled between the first spoiler section (1131) and the second spoiler section (1132); compared with the first spoiler section (1131) and the second spoiler section (1132), the distance between the spoiler connecting section (1133) and the long axis of the adjacent heat exchange tube mounting hole (112) is the smallest; the spoiler further includes a second spoiler (117) arranged between two adjacent heat exchange tube mounting holes (112) in the N+1th row of heat exchange tube mounting hole group; A first flow guiding channel (1151) is formed between the first flow spoiler (113) and the wall of the heat exchange tube (171) on the heat exchange tube mounting hole (112) adjacent to the first flow guiding channel in the second direction, the first flow guiding channel (1151) comprising a first gradually converging channel and a first gradually expanding channel connected in sequence from bottom to top; The first spoiler (113) is pear-shaped, a pear-shaped channel (1134) is formed in the middle of the first spoiler (113), and the pear-shaped channel (1134) has flanges on both sides along the second direction to form the first spoiler (1130); the pear-shaped channel (1134) includes, from bottom to top, a second gradually expanding channel and a second gradually converging channel that are interconnected; The pear-shaped channel (1134) has a first opening (1135) and a second opening (1136) arranged opposite to each other along the first direction; in the first direction, the first opening (1135) is located upstream of the second opening (1136), and the size of the first opening (1135) is larger than the size of the second opening (1136); the size of the second opening (1136) is not larger than one-quarter of the minor axis size of the heat exchange tube mounting hole (112).

2. The heat exchange fin according to claim 1, characterized in that: The flow-turbulating connecting section (1133) has a first position point that is closer to the adjacent heat exchange tube mounting hole (112) along the second direction; defining a virtual extension line extending from the first position point along the second direction to the adjacent heat exchange tube mounting hole (112) as a first virtual extension line (1191); defining a virtual extension line passing through the center of the heat exchange tube mounting hole (112) and extending along the second direction as a second virtual extension line (1192); The distance between the first virtual extension line (1191) and the second virtual extension line (1192) along the first direction is not greater than a preset distance value.

3. The heat exchange fin according to claim 1, characterized in that: The second spoiler (117) is arranged at the air outlet end (1112) of the substrate (111); The second spoiler (117) has a frontal surface (1173) facing the airflow, and a guide surface (1174) connected to the frontal surface (1173), so that the airflow flowing toward the air outlet (1112) at least partially contacts the frontal surface (1173) and flows out of the air outlet (1112) of the substrate (111) with the help of the guidance of the guide surface (1174).

4. The heat exchange fin according to claim 3, characterized in that: The second spoiler (117) is a U-shaped flange, and the base plate (111) is provided with a vent hole (118) located on the upstream side of the U-shaped flange; and / or The second spoiler (117) is a V-shaped flange.

5. The heat exchange fin according to claim 1, characterized in that: The spoiler also includes an elliptical spoiler (114); The heat exchange tube mounting hole group in odd-numbered rows includes M heat exchange tube mounting holes (112), and the heat exchange tube mounting hole group in even-numbered rows includes M-1 heat exchange tube mounting holes (112); The elliptical spoilers (114) are located on both sides of the heat exchange tube mounting hole groups in even-numbered rows; The elliptical spoiler (114) is provided with third openings (1141) arranged opposite to each other at both ends along the first direction.

6. The heat exchange fin according to claim 5, characterized in that: The substrate (111) is provided with heat dissipation protrusions (116) extending in the thickness direction of the substrate (111) at both ends along the second direction; the heat dissipation protrusions (116) include a first portion (1161) corresponding to the heat exchange tube mounting holes (112) in the odd-numbered rows of heat exchange tube mounting hole groups close to the end of the substrate (111), and a second portion (1162) corresponding to the elliptical spoiler (114); The second portion (1162) is recessed inwardly in the second direction compared to the first portion (1161).

7. A heat exchange device, characterized in that: include: A heat exchange fin group, comprising a plurality of heat exchange fins (110) according to any one of claims 1 to 6 arranged side by side; as well as The heat exchange tube group (170) comprises a plurality of heat exchange tubes (171), wherein the heat exchange tubes (171) pass through the corresponding heat exchange tube mounting holes (112) of each heat exchange fin (110), so that the heat exchange tubes (171) are connected to the heat exchange fins (110).

Images