Heat exchange sheet and heat exchanger

Abstract

The utility model belongs to the technical field of heat exchange equipment, and particularly discloses a heat exchange sheet and a heat exchanger, the heat exchange sheet comprises a sheet-shaped body, the sheet-shaped body is provided with a pipe flanging hole and a first flanging hole, and the first flanging hole is located at the downstream of the pipe flanging hole along the flowing direction of smoke; wherein the pipe flanging hole is used for being connected with a heat exchange pipe in a sleeved mode, and a plurality of grooves are formed in the end portion of the flanging of the first flanging hole. According to the heat exchange piece, the grooves in the turnup ends of the first turnup holes can destroy the laminar flow structure of smoke, so that the contact area of different laminar flows of the smoke and the piece-shaped body is increased, the turnup of the first turnup holes can increase the contact area of the heat exchange piece and the smoke, the heat exchange efficiency of the heat exchange piece and the smoke is effectively improved, and the heat exchange efficiency of the heat exchange piece and the smoke is improved. And the heating efficiency of the liquid in the heat exchange tube is further improved. In addition, the contact area between the smoke and the heat exchange sheets and the heat exchange tubes is larger under disturbance of the first flanging holes, the heat exchange effect is better, and the temperature rising efficiency of liquid in the heat exchange tubes is higher.

Description

Technical Field

[0001] This utility model relates to the field of heat exchange equipment technology, and in particular to a heat exchange plate and a heat exchanger. Background Technology

[0002] A gas water heater, also known as a gas water boiler, is a gas appliance that uses gas as fuel and heats water by transferring heat to cold water flowing through a heat exchanger. A gas water heater mainly consists of a valve assembly, a main burner, a pilot burner, a heat exchanger, and safety devices.

[0003] A heat exchanger typically includes heat exchange tubes and multiple heat exchange fins fitted onto the heat exchange tubes. High-temperature flue gas passes between the heat exchange fins and exchanges heat with the heat exchange tubes and fins. The heat exchange tubes absorb the heat from the high-temperature flue gas and transfer it to the liquid inside the heat exchange tubes. The heat exchange fins absorb the heat from the high-temperature flue gas and transfer it to the heat exchange tubes, which then transfer it to the liquid inside the heat exchange tubes, thereby achieving the purpose of heating the liquid inside the heat exchange tubes.

[0004] In related technologies, high-temperature flue gas usually flows through heat exchange fins in a laminar flow state. The heat exchange efficiency between the heat exchange fins and the flue gas is generally low, which affects the heating efficiency of the liquid inside the heat exchange tube. Utility Model Content

[0005] One of the technical problems solved by this utility model is to provide a heat exchange plate that can effectively solve the problem of low heat exchange efficiency between the heat exchange plate and the flue gas.

[0006] The second technical problem solved by this utility model is to provide a heat exchanger that can effectively solve the problem of low liquid heating efficiency in heat exchange tubes.

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

[0008] A heat exchange plate includes a plate-shaped body, the plate-shaped body having a tube flange hole and a first flange hole, the first flange hole being located downstream of the tube flange hole along the flow direction of flue gas; wherein, the tube flange hole is used to fit a heat exchange tube, and the flanged end of the first flange hole has multiple grooves.

[0009] Compared with the prior art, the heat exchange plate of this invention has the following advantages: When flue gas flows through the plate-shaped body, the flue gas bypasses the flanged hole and acts on the first flanged hole. The groove at the flanged end of the first flanged hole can disrupt the laminar flow structure of the flue gas, thereby increasing the contact area between different laminar flows of the flue gas and the plate-shaped body. Furthermore, the flange of the first flanged hole can increase the contact area between the heat exchange plate and the flue gas, effectively improving the heat exchange efficiency between the heat exchange plate and the flue gas. In addition, under the disturbance of the first flanged hole, the contact area between the flue gas and the heat exchange plate and heat exchange tube is larger, resulting in a better heat exchange effect and higher liquid heating efficiency within the heat exchange tube.

[0010] In one embodiment, the flange of the first flange hole includes a plurality of spikes arranged around the first flange hole, and a groove is formed between two adjacent spikes.

[0011] In one embodiment, the sheet-like body has baffles on both sides along the direction perpendicular to the flue gas flow, and the sheet-like body has multiple guide flanges along the downstream edge along the flue gas flow direction. The multiple guide flanges are spaced apart along the direction perpendicular to the flue gas flow, and an air outlet is formed between two adjacent guide flanges. The air outlets correspond one-to-one with the pipe flange holes along the flue gas flow direction.

[0012] In one embodiment, the flow guide flange includes two first flanges and at least one second flange, the second flange being located between the two first flanges, and at least one first flange hole is provided between adjacent second flanges and the pipe flange hole along the flow direction of flue gas.

[0013] In one embodiment, the projection of at least one of the first flanged holes is located within the outlet along the flow direction of the flue gas.

[0014] In one embodiment, the sheet-like body is provided with two second flange holes that correspond one-to-one with the first flange. The second flange holes are located downstream of the pipe flange holes along the flue gas flow direction, and at least a portion of the projection of the second flange holes along the flue gas flow direction coincides with the first flange.

[0015] In one embodiment, the sheet-like body is provided with a plurality of tube flange holes at intervals along the direction perpendicular to the flue gas flow, and an elongated flange hole is provided between two adjacent tube flange holes, the elongated flange hole extending along the flue gas flow direction.

[0016] In one embodiment, the sheet-like body is provided with a flow guide portion, which is located upstream of the pipe flange hole along the flow direction of the flue gas, and the flow guide portion includes a plurality of flow guide protrusions spaced apart around the pipe flange hole.

[0017] In one embodiment, the diameter of the flow guide convex bulge is smaller than the diameter of the first flange hole.

[0018] The second technical problem mentioned above is solved by the following technical solution:

[0019] A heat exchanger includes a housing, heat exchange tubes, and a plurality of heat exchange plates as described above, wherein the plurality of heat exchange plates are disposed within the housing, and the heat exchange tubes pass through the tube flange holes of the heat exchange plates.

[0020] Compared with the prior art, the heat exchanger of this utility model has the following advantages: the first flanged hole of the heat exchange plate can increase the contact area between the different laminar flow of flue gas and the plate body, and the flange of the first flanged hole can increase the contact area between the heat exchange plate and the heat exchange tube and the flue gas, effectively improving the heat exchange efficiency between the heat exchange plate and the heat exchange tube and the flue gas, thereby improving the liquid heating efficiency in the heat exchange tube. Attached Figure Description

[0021] Figure 1 A schematic diagram of the heat exchanger plate provided by this utility model from one perspective;

[0022] Figure 2 This is a magnified schematic diagram of a portion of the heat exchange plate provided by this utility model at the second flange hole;

[0023] Figure 3 A simulation diagram of flue gas flow on the heat exchanger plate provided by this utility model;

[0024] Figure 4 Another structural schematic diagram of the heat exchanger provided by this utility model;

[0025] Figure 5 Provided by this utility model Figure 4 A magnified view of the local structure at point A in the middle.

[0026] Label Explanation:

[0027] 100. Sheet-shaped body; 110. Tube flange hole; 111. First outer flange; 112. Support edge; 113. Second outer flange; 120. First flange hole; 121. Groove; 122. Spike; 130. Baffle; 140. Flow guide flange; 1401. Air outlet; 1402. Gap; 141. First flange; 142. Second flange; 1421. Flanged part; 150. Recess; 160. Second flange hole; 170. Long strip flange hole; 180. Flow guide part; 181. Flow guide bulge. Detailed Implementation

[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0029] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0030] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0031] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0032] Reference Figures 1 to 3 As shown, this embodiment provides a heat exchange plate, which includes a plate-shaped body 100. The plate-shaped body 100 has a tube flange hole 110 and a first flange hole 120. The first flange hole 120 is located downstream of the tube flange hole 110 along the flue gas flow direction. The tube flange hole 110 is used to fit a heat exchange tube (not shown), and the flanged end of the first flange hole 120 has multiple grooves 121. In the figure, direction a can be the flue gas flow direction, which can also be the width direction of the plate-shaped body 100.

[0033] In this embodiment, when flue gas flows through the plate-shaped body 100, the flue gas bypasses the tube flange hole 110 and acts on the first flange hole 120. The groove 121 at the flange end of the first flange hole 120 can disrupt the laminar flow structure of the flue gas, thereby increasing the contact area between different laminar flows of the flue gas and the plate-shaped body 100. Furthermore, the flange of the first flange hole 120 can increase the contact area between the heat exchange plate and the flue gas, effectively improving the heat exchange efficiency between the heat exchange plate and the flue gas, and thus improving the liquid heating efficiency in the heat exchange tube. In addition, under the disturbance of the first flange hole 120, the contact area between the flue gas and the heat exchange plate and the heat exchange tube is larger, the heat exchange effect is better, and the liquid heating efficiency in the heat exchange tube is higher.

[0034] In one feasible implementation, the flange of the first flange hole 120 includes a plurality of spikes 122 arranged around the first flange hole 120, and a groove 121 is formed between two adjacent spikes 122. The arrangement of the spikes 122 can better disrupt the laminar flow structure of the flue gas, and the contact area between the different laminar flows of the flue gas and the plate body 100 is larger, resulting in higher heat exchange efficiency between the heat exchange plate and the flue gas.

[0035] For example, the flange of the first flange hole 120 includes two to eight spikes 122, such as three, four, five or six.

[0036] For example, the first flange hole 120 is provided in multiple ways, and the number of spikes 122 in all flange holes may be the same or different, which is not limited in this application.

[0037] In one feasible embodiment, the flanged end of the tube flange hole 110 is provided with a plurality of first outer flanges 111 that bend outward toward the tube flange hole 110 at intervals, which can increase the contact area between the flue gas and the heat exchange plate and effectively improve the heat exchange efficiency between the heat exchange plate and the heat exchange tube and the flue gas.

[0038] For example, the first outer flange 111 may be arranged parallel to the sheet-like body 100.

[0039] For example, the tube flange hole 110 is provided with at least one first outer flange 111 on each side along the direction perpendicular to the flue gas flow, for example, two flanges. The direction perpendicular to the flue gas flow can be the length direction of the sheet-like body 100.

[0040] In one feasible embodiment, the flanged end of the tube flange hole 110 extends to provide a support edge 112, and the end of the support edge 112 is provided with a second outer flange 113 that bends outward toward the tube flange hole 110. The second outer flange 113 of one of two adjacent heat exchange plates abuts against the plate-shaped body 100 of the other to form a support.

[0041] For example, the pipe flange hole 110 is provided with support edges 112 on both sides along the flow direction of flue gas, and the support edges 112 are provided with at least one second outward flange 113, for example, two are provided at intervals.

[0042] In this embodiment, reference is made to Figure 1 and Figure 4 As shown, the sheet-like body 100 has baffles 130 on both sides of its edge perpendicular to the direction of flue gas flow. The sheet-like body 100 has multiple guide flanges 140 on its downstream edge along the direction of flue gas flow. The multiple guide flanges 140 are spaced apart along the direction perpendicular to the direction of flue gas flow. An air outlet 1401 is formed between two adjacent guide flanges 140. The air outlet 1401 corresponds one-to-one with the pipe flange hole 110 along the direction of flue gas flow. In this embodiment, the baffle 130 guides the flow of flue gas, allowing it to flow stably from the upstream edge to the downstream edge of the plate-shaped body 100, and concentrating the flue gas towards the tube flange hole 110 to ensure good heat exchange efficiency between the heat exchange plates and heat exchange tubes and the flue gas. Furthermore, the guide flange 140 also guides the flow of flue gas, causing the flue gas downstream of the tube flange hole 110 to diffuse perpendicular to its own flow direction, effectively extending the heat exchange time between the flue gas and the heat exchange plates, and increasing the contact area between the flue gas and the plate-shaped body 100 and the heat exchange tubes, allowing more flue gas to exchange heat with the heat exchange tubes, further ensuring the heat exchange efficiency between the heat exchange plates and heat exchange tubes and the flue gas. In addition, the outlet 1401 corresponds one-to-one with the tube flange hole 110 along the flue gas flow direction, which reduces air resistance.

[0043] It is worth mentioning that if the distance between adjacent tube flange holes 110 and baffles 130 is too large, it will affect the heat exchange efficiency between the heat exchange fins and tubes and the flue gas; if it is too small, it will cause significant flow resistance. Optionally, such as Figure 4 As shown, the distance S1 between adjacent pipe flange holes 110 and flanges 130 can be 2mm-2.5mm.

[0044] In one feasible embodiment, the flow guide flange 140 includes two first flanges 141 and at least one second flange 142. The second flange 142 is located between the two first flanges 141. At least one first flange hole 120 is provided between adjacent second flanges 142 and tube flange holes 110 along the flow direction of flue gas. The second flanges 142 and the first flange holes 120 cooperate to squeeze more flue gas into the tube flange holes 110, thereby improving the heat exchange efficiency between the heat exchange plates and heat exchange tubes and the flue gas.

[0045] For example, one to six, such as two, three or four, are spaced apart between adjacent second flanges 142 and pipe flange holes 110 along the flue gas flow direction.

[0046] For example, such as Figure 4As shown, the distance S2 between adjacent first flange hole 120 and second flange 142 can be greater than or equal to 1.5mm to prevent excessive resistance to flue gas flow between them.

[0047] In some embodiments, a gap 1402 is formed between the first flange 141 and the stop edge 130 to facilitate the bending and forming of the first flange 141 and the stop edge 130. For example, as... Figure 5 As shown, the distance S3 of the gap 1402 between the first flange 141 and the baffle 130 can be less than or equal to 0.5 mm. In some embodiments, the first flange 141 and the baffle 130 abut against each other, that is, no gap is formed between them, to prevent the flue gas from flowing out between the first flange 141 and the baffle 130, so that the flue gas flows toward the outlet 1401, further prolonging the heat exchange time between the flue gas and the heat exchange plate, and increasing the heat exchange efficiency between the heat exchange plate and the flue gas.

[0048] In one feasible embodiment, the sheet-like body 100 is provided with at least one recess 150, and the second flange 142 is correspondingly provided at each recess 150. In some embodiments, the second flange 142 includes two flange portions 1421 arranged at an included angle, and at least one first flange hole 120 is provided between adjacent flange portions 1421 and the pipe flange hole 110 along the flow direction of the flue gas, which can squeeze more flue gas into the pipe flange hole 110 and reduce air resistance, guiding the flue gas to flow towards the outlet 1401. Exemplarily, the second flange 142 can be configured as a V-shape. Of course, the second flange 142 can also be configured as a U-shape, arc shape or other shapes, which are not limited in this application.

[0049] In one feasible implementation, along the flow direction of the flue gas, the projection of at least one first flanged hole 120 is located within the outlet 1401. This, combined with the first flanged hole 120 between the second flange 142 and the pipe flanged hole 110, better guides the flow of flue gas toward the outlet 1401. Exemplarily, the first flanged holes 120 between two adjacent second flanges 142 are arranged in a V-shape.

[0050] In one feasible implementation, at least a portion of the projection of the first flange 120, which is at the largest distance from the tube flange hole 110, along the direction perpendicular to the flue gas flow coincides with the second flange 142, so as to ensure that the heat exchange plate has a compact structure and can better guide the flow of flue gas toward the outlet 1401.

[0051] In this embodiment, reference is made to Figure 1 and Figure 4As shown, the sheet-like body 100 may also be provided with two second flange holes 160 corresponding one-to-one with the first flange 141. The second flange holes 160 are located downstream of the tube flange holes 110 along the flue gas flow direction, and at least part of the projection of the second flange holes 160 along the flue gas flow direction coincides with the first flange 141. In this embodiment, the second flange holes 160 can increase the contact area between the heat exchange plate and the flue gas; and the second flange holes 160 can also prevent the flue gas from flowing out through the gap 1402 between the first flange 141 and the baffle plate, and can squeeze more flue gas into the tube flange holes 110.

[0052] For example, the diameter of the second flanged hole 160 is greater than or equal to the diameter of the first flanged hole 120.

[0053] In one feasible embodiment, the sheet-like body 100 is provided with a plurality of tube flange holes 110 spaced apart along the direction perpendicular to the flue gas flow, and an elongated flange hole 170 is provided between two adjacent tube flange holes 110. The elongated flange hole 170 extends along the flue gas flow direction. The elongated flange hole is used to divert the flue gas, causing the flue gas to be squeezed toward the tube flange hole 110, thereby improving the heat exchange effect between the flue gas and the heat exchange tube. Furthermore, the elongated flange hole 170 can further increase the contact area between the heat exchange plate and the heat exchange tube and the flue gas, thereby further improving the heat exchange efficiency between the heat exchange plate and the heat exchange tube and the flue gas.

[0054] For example, the elongated flange hole 170 includes, but is not limited to, a waist-shaped flange hole, a rectangular flange hole, or an elliptical flange hole.

[0055] Optionally, when the elongated flanged hole 170 is set as a waist-shaped flanged hole, the ratio between the length of the elongated flanged hole 170 and the diameter of the pipe flanged hole 110 can be greater than 7:10, so as to ensure the diversion and compression effect of the flue gas.

[0056] It is worth mentioning that if the distance between the elongated flanged hole 170 and the tube flanged hole 110 is too large, it will affect the heat exchange efficiency between the heat exchange tube and heat exchange fins and the flue gas; if it is too small, it will cause significant flow resistance. Optionally, such as Figure 4 As shown, the distance S4 between the elongated flanged hole 170 and the tube flanged hole 110 can be 3.5mm-4mm.

[0057] In this embodiment, reference is made to Figure 1 and Figure 4 As shown, the sheet-like body 100 may also be provided with a flow guide 180. The flow guide 180 is located upstream of the tube flange hole 110 along the flow direction of the flue gas. The flow guide 180 includes a plurality of flow guide protrusions 181 arranged at intervals around the tube flange hole 110, which can increase the heat exchange area of ​​the sheet-like body 100 and can disturb the flue gas, thereby improving the heat exchange efficiency between the sheet-like body 100 and the flue gas upstream of the tube flange hole 110.

[0058] It is worth mentioning that the flue gas temperature downstream of the pipe flange hole 110 is relatively high, and the size of the sheet body 100 along the flue gas flow direction should not be too large. If the size is too large, the sheet body 100 will be blackened and damaged in the downstream area of ​​the pipe flange hole 110. In order to prevent the sheet body 100 from being blackened and damaged downstream of the pipe flange hole 110, the diameter of the guide protrusion 181 provided upstream of the pipe flange hole 110 is smaller than the diameter of the first flange hole 120.

[0059] For example, the diameter of the first flanged hole 120 can be greater than or equal to 2.5 mm.

[0060] For example, the flow guide 180 includes three to six flow guide protrusions 181. Optionally, along the direction perpendicular to the flue gas flow, the flow guide 180 corresponding to the outermost tube flange hole 110 includes three flow guide protrusions, and the flow guide 180 corresponding to the remaining tube flange holes 110 includes four flow guide protrusions. The plate-shaped body 100 has better heat exchange efficiency with the flue gas upstream of the tube flange hole 110.

[0061] This embodiment also provides a heat exchanger, which includes a shell, heat exchange tubes, and multiple heat exchange plates as described above. The multiple heat exchange plates are stacked inside the shell, and the heat exchange tubes pass through the tube flange holes 110 of the heat exchange plates. In this embodiment, the first flange hole 120 of the heat exchange plate can increase the contact area between the different laminar flows of flue gas and the plate-shaped body 100, and the flange of the first flange hole 120 can increase the contact area between the heat exchange plates and heat exchange tubes and the flue gas, effectively improving the heat exchange efficiency between the heat exchange plates and heat exchange tubes and the flue gas, thereby improving the liquid heating efficiency inside the heat exchange tubes.

[0062] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0063] The specific embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A heat exchange plate, characterized in that, The device includes a sheet-like body (100), which has a tube flange hole (110) and a first flange hole (120). The first flange hole (120) is located downstream of the tube flange hole (110) along the flow direction of the flue gas. The tube flange hole (110) is used to connect a heat exchange tube, and the flange end of the first flange hole (120) is provided with a plurality of grooves (121).

2. The heat exchange plate according to claim 1, characterized in that, The flange of the first flange hole (120) includes a plurality of spikes (122) arranged around the first flange hole (120), and a groove (121) is formed between two adjacent spikes (122).

3. The heat exchange plate according to claim 1, characterized in that, The sheet-like body (100) has baffles (130) on both sides of its edge perpendicular to the direction of flue gas flow. The sheet-like body (100) has multiple guide flanges (140) on its downstream edge along the direction of flue gas flow. The multiple guide flanges (140) are spaced apart along the direction perpendicular to the direction of flue gas flow. An air outlet (1401) is formed between two adjacent guide flanges (140). The air outlet (1401) corresponds one-to-one with the pipe flange hole (110) along the direction of flue gas flow.

4. The heat exchange plate according to claim 3, characterized in that, The flow guide flange (140) includes two first flanges (141) and at least one second flange (142). The second flange (142) is located between the two first flanges (141). At least one first flange hole (120) is provided between adjacent second flanges (142) and the pipe flange hole (110) along the flow direction of flue gas.

5. The heat exchange plate according to claim 4, characterized in that, Along the flow direction of the flue gas, the projection of at least one of the first flanged holes (120) is located within the outlet (1401).

6. The heat exchange plate according to claim 4, characterized in that, The sheet-like body (100) is provided with two second flange holes (160) that correspond one-to-one with the first flange (141). The second flange holes (160) are located downstream of the pipe flange hole (110) along the flow direction of the flue gas. At least part of the projection of the second flange holes (160) along the flow direction of the flue gas coincides with the first flange (141).

7. The heat exchange plate according to claim 1, characterized in that, The sheet-like body (100) is provided with a plurality of tube flange holes (110) spaced apart along the direction perpendicular to the flue gas flow, and an elongated flange hole (170) is provided between two adjacent tube flange holes (110), and the elongated flange hole (170) extends along the flue gas flow direction.

8. The heat exchange plate according to claim 1, characterized in that, The sheet-like body (100) is provided with a flow guide (180), which is located upstream of the pipe flange hole (110) along the flow direction of the flue gas. The flow guide (180) includes a plurality of flow guide protrusions (181) spaced around the pipe flange hole (110).

9. The heat exchange plate according to claim 8, characterized in that, The diameter of the flow guide convex bulge (181) is smaller than the diameter of the first flange hole (120).

10. A heat exchanger, characterized in that, It includes a housing, heat exchange tubes, and a plurality of heat exchange plates as described in any one of claims 1-9, wherein the plurality of heat exchange plates are stacked within the housing, and the heat exchange tubes pass through the tube flange holes (110) of the heat exchange plates.

Images