A tubular heat exchanger

Abstract

The utility model discloses a tubular heat exchanger, including the first water collecting box and second water collecting box of left -right symmetry, is equipped with two rows of tubular heat exchange pipe between two water collecting boxes. The first water collecting box is equipped with the water inlet pipe connecting mouth and convex envelope no.

Description

Technical Field

[0001] This utility model relates to a tubular heat exchanger with a compact structure and high heat exchange efficiency, belonging to the field of heat exchanger technology. Background Technology

[0002] Existing tubular heat exchangers typically employ three or more rows of circular tubes or flat / elliptical tubes, but these generally suffer from drawbacks such as large size, high material consumption, low space utilization, and high manufacturing costs. For example, the prior art with application number 202020275797.7 uses a three-row heat exchange tube structure, which achieves a certain heat exchange effect, but it is difficult to meet the compact design requirements in space-constrained applications. Furthermore, the traditional design of the heat-absorbing fins also suffers from insufficient utilization of the heat exchange area and high airflow resistance, hindering further improvements in overall heat exchange efficiency. Utility Model Content

[0003] The purpose of this invention is to provide a tubular heat exchanger that, through structural optimization, reduces the overall size and saves material costs while ensuring heat exchange efficiency.

[0004] The technical solution of this utility model is as follows: A tubular heat exchanger includes a first water collection box and a second water collection box symmetrically arranged on both sides, with two rows of tubular heat exchange tubes arranged between the first water collection box and the second water collection box. The first water collection box has an inlet pipe connection port and several protrusions on its outer side. The inlet pipe connection port is used to connect the inlet pipe. The first water collection box has several through holes on its inner side. Each through hole corresponds to the protrusion on the outer side of the first water collection box and the inlet pipe connection port. The protrusions are used to connect two corresponding inner through holes to form a passage. The second water collection box has a water outlet pipe connection port and a second protrusion on its outer side. The water outlet pipe connection port is used to connect the water outlet pipe. The second water collection box has several through holes on its inner side. Each through hole corresponds to the second protrusion on the outer side of the second water collection box and the water outlet pipe connection port. The second protrusion is used to connect two corresponding inner through holes to form a passage. Through hole one and through hole two are connected by a circular heat exchange tube; through hole one, through hole two, and the tubular heat exchange tube are all interconnected; Several heat-absorbing fins are fitted onto two rows of tube heat exchangers, and the heat-absorbing fins cover all the heat exchangers.

[0005] Preferably, six sets of the above-mentioned circular tube heat exchange tubes are arranged in each row.

[0006] Preferably, the heat-absorbing fins are integral, with several circular through holes symmetrically opened in the upper and lower rows, the number of which is the same as the number of circular heat exchange tubes. The through holes are used for the heat-absorbing fins to fit into the circular heat exchange tubes.

[0007] Preferably, the heat-absorbing fins are provided with flanges on both the left and right sides to reduce flue gas leakage and effectively increase the heat exchange effect.

[0008] Preferably, the top of the heat-absorbing fins is provided with a second flange; the through hole is provided with a third flange, which fits more closely to the outer wall of the heat exchange tube and increases the heat exchange effect; the second flange and the third flange on the through hole are coaxial.

[0009] Preferably, a plurality of slots are provided between the upper and lower rows of through holes three of the heat-absorbing fins, an arc-shaped flange four is provided at the top of the slot, and a heat dissipation channel is formed between the flange four and the flange three of the through hole three diagonally above, and two arc-shaped flanges five are provided on both sides of the bottom of the slot, and a heat dissipation channel is formed between the flange five and the flange three of the through hole three diagonally below.

[0010] After the water enters the circular heat exchange tubes through the inlet pipe, it flows in series in the bottom row. Finally, after flowing to the top row, it first flows in parallel through two circular heat exchange tubes, then flows in series through a single tube, and finally flows out of the heat exchanger through the outlet pipe.

[0011] The beneficial effects achieved by this utility model are: 1. By adopting a two-row heat exchange tube structure, the heat exchange area is increased in a limited space, improving space utilization, making the overall structure more compact, and reducing the amount of materials used; 2. The structure of the heat-absorbing fins fits more closely to the outer wall of the heat exchange tube, increasing the heat exchange effect; 3. The sides of the heat-absorbing fins are integrally flanged to reduce flue gas leakage and effectively increase heat exchange efficiency; 4. After the water flows through the inlet pipe into the circular tube heat exchanger, it first flows through the bottom row and then to the top row, which can reduce the generation of condensate. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the planar structure of the present invention; Figure 2 for Figure 1 A schematic diagram showing the removal of some heat dissipation fins; Figure 3 This is a schematic diagram of the first water collection box of this utility model. Figure 1 ; Figure 4 for Figure 3 Schematic diagram of through hole one; Figure 5 This is a schematic diagram of the second water collection box of this utility model. Figure 2 ; Figure 6 for Figure 5 Schematic diagram of the second through hole; Figure 7 This is a planar schematic diagram of the heat-absorbing fins; Figure 8 This is a three-dimensional schematic diagram of the heat-absorbing fins. Detailed Implementation

[0013] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0014] like Figures 1 to 6 As shown, the tubular heat exchanger of this utility model includes a first water collection box 1 and a second water collection box 2, which are connected by two rows of circular heat exchange tubes 3. The first water collection box 1 has an inlet pipe connection port 11 and multiple protrusions 12 on its outer side, and through holes 13 on its inner side. The protrusions 12 connect two corresponding through holes 13. The second water collection box 2 has an outlet pipe connection port 21 and a protrusion 22 on its outer side, and through holes 23 on its inner side. The protrusions 22 connect two corresponding through holes 23.

[0015] The two ends of the circular heat exchange tube 3 are inserted into through holes 13 and 23 respectively to form fluid channels. Multiple heat-absorbing fins 4 are sleeved on the two rows of heat exchange tubes 3.

[0016] like Figure 7-8 As shown, the heat-absorbing fins 4 are integral, with several circular through holes 3 41 symmetrically opened in the upper and lower rows. The number of holes 3 41 is the same as the number of circular heat exchange tubes 3. The through holes 3 41 are used for the heat-absorbing fins to be inserted into the circular heat exchange tubes 3.

[0017] The heat-absorbing fins 4 are provided with flanges 42 on both the left and right sides to reduce flue gas leakage and effectively increase the heat exchange effect.

[0018] The heat-absorbing fin 4 is provided with a second flange 43 at the top; the through hole 41 is provided with a third flange 44, which fits more closely to the outer wall of the heat exchange tube and increases the heat exchange effect; the second flange 43 and the third flange 44 on the through hole 41 are coaxial.

[0019] Several slots 45 are provided between the upper and lower rows of through holes 41 of the heat-absorbing fins 4. An arc-shaped flange 46 is provided at the top of the slot 45. The flange 46 and the flange 44 of the through hole 41 above it form a heat dissipation channel. Two arc-shaped flanges 47 are provided on both sides of the bottom of the slot 45. The flange 47 and the flange 44 of the through hole 41 below it form a heat dissipation channel.

[0020] During operation, the fluid enters through the inlet pipe of the first water collection box, passes through the first through hole of the first water collection box, the round heat exchange tube, and the second through hole of the second water collection box in sequence, and reaches the second bulge of the second water collection box. The second bulge connects to the second through hole of the bottom layer, and the fluid flows back to the first water collection box. The water flows in this manner until it reaches the first heat exchange tube I at the outermost edge of the first water collection box. Then the water flows to the upper layer and enters tubes II and III in parallel. After flowing to the other side, the fluid finally mixes and flows into a heat exchange tube IV.

[0021] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it; any modifications, substitutions and variations made by those skilled in the art to the above embodiments within the scope of the utility model are all within the protection scope of this utility model.

Claims

1. A tubular heat exchanger, characterized in that, It includes a first water collection box and a second water collection box that are symmetrically arranged on both sides, with two rows of tubular heat exchange tubes installed between the first water collection box and the second water collection box. The first water collection box has an inlet pipe connection port and several protrusions on its outer side. The inlet pipe connection port is used to connect the inlet pipe. The first water collection box has several through holes on its inner side. Each through hole corresponds to the protrusion on the outer side of the first water collection box and the inlet pipe connection port. The protrusions are used to connect two corresponding inner through holes to form a passage. The second water collection box has a water outlet pipe connection port and a second protrusion on its outer side. The water outlet pipe connection port is used to connect the water outlet pipe. The second water collection box has several through holes on its inner side. Each through hole corresponds to the second protrusion on the outer side of the second water collection box and the water outlet pipe connection port. The second protrusion is used to connect two corresponding inner through holes to form a passage. Through hole one and through hole two are connected by a circular heat exchange tube; through hole one, through hole two, and the tubular heat exchange tube are all interconnected; Several heat-absorbing fins are fitted onto two rows of tube heat exchangers, and the heat-absorbing fins cover all the heat exchangers.

2. A tubular heat exchanger according to claim 1, characterized in that, The circular tube heat exchanger tubes are arranged in six groups per row.

3. A tubular heat exchanger according to claim 1, characterized in that, The heat-absorbing fins are integral, with several circular through holes symmetrically opened in the upper and lower rows. The number of through holes is the same as the number of circular heat exchange tubes. The through holes are used for the heat-absorbing fins to fit into the circular heat exchange tubes.

4. A tubular heat exchanger according to claim 3, characterized in that, The heat-absorbing fins are provided with flanges on both the left and right sides to reduce flue gas leakage and effectively increase the heat exchange effect.

5. A tubular heat exchanger according to claim 3, characterized in that, The heat-absorbing fins are provided with a second flange at the top; the through hole is provided with a third flange, which fits more closely to the outer wall of the heat exchange tube and increases the heat exchange effect; the second flange and the third flange on the through hole are coaxial.

6. A tubular heat exchanger according to claim 3, characterized in that, Several slots are provided between the upper and lower rows of through holes three of the heat-absorbing fins. An arc-shaped flange four is provided at the top of the slot. The flange four and the flange three of the through hole three diagonally above form a heat dissipation channel. Two arc-shaped flanges five are provided on both sides of the bottom of the slot. The flange five and the flange three of the through hole three diagonally below form a heat dissipation channel.

7. A tubular heat exchanger according to claim 1, characterized in that, After the water enters the circular heat exchange tubes through the inlet pipe, it flows in series in the bottom row. Finally, after flowing to the top row, it first flows in parallel through two circular heat exchange tubes, then flows in series through a single tube, and finally flows out of the heat exchanger through the outlet pipe.

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