Stainless steel surface air cooler

Abstract

The utility model discloses a stainless steel surface air cooler which comprises a water inlet collecting pipe, a water outlet collecting pipe, a plurality of stainless steel fins, a plurality of stainless steel elbows, a plurality of stainless steel heat exchange pipes and a stainless steel frame. The multiple stainless steel fins are arranged in the stainless steel frame in a stacked mode. A plurality of rows of heat exchange holes are formed in each stainless steel fin, the stainless steel heat exchange pipes are inserted into the heat exchange holes, and every two adjacent stainless steel heat exchange pipes are communicated through one stainless steel elbow; and the water inlet collecting pipe and the water outlet collecting pipe are inserted into one end of the stainless steel frame. Slits are formed between the heat exchange holes formed in each row in the stainless steel fins. A plurality of downstream convex points are arranged between the first row of heat exchange holes and the second row of heat exchange holes in the stainless steel fins; the stainless steel surface air cooler aims to overcome the existing defects, the expected heat exchange effect is achieved, and the problem of condensate water is solved.

Description

Technical Field

[0001] This utility model relates to a stainless steel surface cooler. Background Technology

[0002] The existing cooling section of the oven uses a tube-fin type surface cooler with copper tubes and aluminum fins. Although copper tubes and aluminum fins have good thermal conductivity, the copper tubes will oxidize and corrode over long-term operation, which poses a certain risk to the clean production environment of pharmaceutical equipment.

[0003] Furthermore, existing surface coolers are structurally non-compact, especially lacking any airflow turbulence devices on the fins, which contributes to their limited heat exchange capacity. This limited heat exchange necessitates the introduction of cooling water at 7°C–12°C during bottle cooling, resulting in significant condensation beneath the surface cooler and on the outer surface of the cooling section. Some of this condensate flows directly into the production environment floor, compromising cleanliness. Therefore, a stainless steel surface cooler is proposed to address these issues. Utility Model Content

[0004] The purpose of this invention is to overcome the existing defects and provide a stainless steel surface cooler that achieves the expected heat exchange effect and solves the condensate problem.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a stainless steel surface cooler, comprising an inlet water collection pipe, an outlet water collection pipe, several stainless steel fins, several stainless steel elbows, several stainless steel heat exchange tubes, and a stainless steel frame.

[0006] Several stainless steel fins are stacked within the stainless steel frame; each stainless steel fin has multiple rows of heat exchange holes, and several stainless steel heat exchange tubes are inserted into the heat exchange holes. Each pair of adjacent stainless steel heat exchange tubes are connected by a stainless steel elbow to connect several stainless steel heat exchange tubes into a heat exchange pipeline.

[0007] The inlet water collection pipe and the outlet water collection pipe are inserted into one end of the stainless steel frame; the inlet water collection pipe is connected to one end of the heat exchange pipe, and the outlet water collection pipe is connected to the other end of the heat exchange pipe.

[0008] Preferably, there is a slit between each row of heat exchange holes on the stainless steel fins;

[0009] Multiple downstream protrusions are provided between the first row of heat exchange holes and the second row of heat exchange holes on the stainless steel fins.

[0010] A vortex generator is provided between each row of heat exchange holes on the stainless steel fins.

[0011] Multiple guide vanes are evenly spaced on one side wall of the stainless steel fin.

[0012] Preferably, both the inlet water collection pipe and the outlet water collection pipe have multiple outlet holes on their outer walls.

[0013] Preferably, the stainless steel fins, the stainless steel elbows, and the stainless steel heat exchange tubes are all made of 316L stainless steel.

[0014] Preferably, the inner wall of the stainless steel heat exchange tube is provided with multiple turbulence protrusions.

[0015] Preferably, the vortex generator is a triangular cone that gradually tapers from the tail to the head. Two triangular cones form a group, and the heads of the two triangular cones are connected close to each other on the stainless steel fin.

[0016] Preferably, the guide vane is semi-arc-shaped.

[0017] Compared with the prior art, the beneficial effects of this utility model are: This stainless steel surface cooler uses 316L stainless steel heat exchange tubes and fins to replace the original copper tubes and aluminum fins, thus solving the risk of easy oxidation and corrosion of copper heat exchange tubes.

[0018] By optimizing the spacing of the transverse and longitudinal holes on the fins, the heat transfer per unit volume of the heat exchanger is increased. Furthermore, by optimizing the spacing between fins and the fin thickness, the fin efficiency is improved. The fins are designed with slots, vortex generators, and downstream bumps to disrupt the boundary layer formed between the air and the fins, thereby enhancing the intensity of convective heat transfer. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0020] Figure 1 This is a schematic diagram of the stainless steel surface cooler of this utility model;

[0021] Figure 2 This is a detailed internal view of the stainless steel surface cooler of this utility model;

[0022] Figure 3 This is a cross-sectional view of the stainless steel surface cooler of this utility model;

[0023] Figure 4 This is a schematic diagram of the stainless steel fins of this utility model;

[0024] Figure 5 This is a detailed drawing of the vortex generator on the stainless steel fins of this utility model;

[0025] Figure 6 This is a detailed view of the slots on the stainless steel fins of this utility model;

[0026] Figure 7 This is a detailed view of the guide vane on the stainless steel fin of this utility model;

[0027] Figure 8 This is a detailed view of the upstream and downstream protrusions of the stainless steel fins of this utility model.

[0028] In the diagram: 1. Inlet water collection pipe; 2. Outlet water collection pipe; 3. Stainless steel fins; 4. Stainless steel elbow; 5. Stainless steel heat exchange tube; 6. Stainless steel frame; 7. Heat exchange hole; 8. Water outlet hole; 9. Slit; 10. Downstream protrusion; 11. Vortex generator; 12. Guide vane. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Please see Figure 1-8 A stainless steel surface cooler includes an inlet water collector pipe 1, an outlet water collector pipe 2, several stainless steel fins 3, several stainless steel elbows 4, several stainless steel heat exchange tubes 5, and a stainless steel frame 6. The stainless steel fins 3 are stacked within the stainless steel frame 6. Each stainless steel fin 3 has multiple rows of heat exchange holes 7, and the stainless steel heat exchange tubes 5 are inserted into these holes 7. Every two adjacent stainless steel heat exchange tubes 5 are connected by a stainless steel elbow 4 to form a heat exchange pipe. The inlet water collector pipe 1 and the outlet water collector pipe 2 are connected to one end of the stainless steel frame 6. The inlet water collector pipe 1 is connected to one end of the heat exchange pipe, and the outlet water collector pipe 2 is connected to the other end of the heat exchange pipe. This stainless steel surface cooler uses 316L stainless steel heat exchange tubes and fins instead of the original copper tubes and aluminum fins, thus solving the risk of oxidation and corrosion of copper heat exchange tubes.

[0031] Specifically, the diameter of the stainless steel heat exchange tube 5 is 18mm; the center-to-center spacing of each heat exchange hole 7 in the horizontal direction is 32mm; the center-to-center spacing of each heat exchange hole 7 in the vertical direction is 29mm; the thickness of the stainless steel fin 3 is 0.20mm; and the spacing between each stainless steel fin 3 is 1.8mm.

[0032] Specifically, the inlet water collection pipe 1 and the outlet water collection pipe 2 are inserted into one end of the stainless steel frame 6. Multiple water outlet holes 8 are opened on the outer wall of both the inlet water collection pipe 1 and the outlet water collection pipe 2.

[0033] Specifically, each row of heat exchange holes 7 on the stainless steel fins 3 has a slot 9 between them; this can effectively suppress the development of the fluid boundary layer on the fins, reduce the thermal resistance at the wall, enhance the turbulence of the fluid on the fins, enhance the convective heat transfer coefficient, and thus increase the heat transfer.

[0034] Specifically, multiple downstream protrusions 10 are provided between the first row of heat exchange holes 7 and the second row of heat exchange holes 7 on the stainless steel fins 3; a vortex generator 11 is provided between each row of heat exchange holes 7 on the stainless steel fins 3; the vortex generator 11 is a triangular cone that gradually tapers from the tail to the head, with two triangular cones forming a group, and the heads of the two triangular cones are close together and connected to the stainless steel fins 3. They are aligned with the incoming flow direction, which can cause the fluid to generate a pair of rotating vortices that move along the mainstream direction after flowing around it. This can greatly increase the turbulence of the fluid on the fins, increase the heat exchange between the fluid and the fins, and thus increase the heat transfer capacity.

[0035] Specifically, multiple guide vanes 12 are evenly spaced on one sidewall of the stainless steel fin 3. The guide vanes 12 are semi-circular. The guide vanes are designed to better guide the fluid to the fins not far from the heat exchange tube, thereby increasing the convective heat transfer coefficient at the edge. Several downstream protrusions 10 are also provided downstream of the incoming flow to increase the disturbance of the downstream fluid, disrupt the boundary layer formed between the downstream fluid and the fins, and enhance the convective heat transfer coefficient.

[0036] Specifically, the stainless steel fins 3, stainless steel elbows 4, and stainless steel heat exchange tubes 5 are all made of 316L stainless steel.

[0037] Specifically, the inner wall of the stainless steel heat exchange tube 5 is provided with multiple turbulence protrusions. These can effectively suppress the development of the fluid boundary layer inside the tube, increase the turbulence of the fluid inside the tube, increase the convective heat transfer between the fluid and the tube wall, reduce the heat transfer resistance, and thus increase the heat transfer capacity.

[0038] Specifically, experimental calculations showed that the air temperature entering the surface cooler was 50℃ and the volumetric flow rate was 0.87 m³ / s. 3 Under the boundary condition of / s, the diameter of the stainless steel heat exchange tube 5 is 18mm; at this time, the heat exchange capacity per unit volume of the surface cooler is 284.5kw / m³. 3 The head resistance is 91.9 Pa. The center-to-center spacing of each of the seven transverse heat exchange holes is 32 mm; at this point, the heat exchange capacity per unit volume of the surface cooler is 285.1 kW / m³. 3 The head resistance is 99.9 Pa. The vertical spacing between the seven heat exchange holes is 29 mm; at this point, the heat exchange capacity per unit volume of the surface cooler is 285.5 kW / m³. 3 The head resistance is 96.3 Pa. The thickness of stainless steel fin 3 is 0.20 mm; at this time, the heat exchange capacity per unit volume of the surface cooler is 286.2 kW / m³. 3The head resistance is 98.3 Pa. The spacing between each stainless steel fin is 1.8 mm. At this point, the heat transfer per unit volume of the surface cooler is 286.7 kW / m³. 3 The head resistance is 99.4 Pa. These are all optimal conditions.

[0039] Specifically, 6m 3 / h, 18°C ​​cooling water enters from the inlet water collection pipe 1 and flows into the stainless steel heat exchange tube 5 through multiple outlet holes 8; thus cooling the hot air blown from the stainless steel fin assembly from 45°C to 23°C.

[0040] This stainless steel surface cooler uses 316L stainless steel heat exchange tubes and fins instead of the original copper tubes and aluminum fins, thus eliminating the risk of oxidation and corrosion of copper heat exchange tubes.

[0041] By optimizing the spacing of the transverse and longitudinal holes on the fins, the heat transfer per unit volume of the heat exchanger was increased. Furthermore, optimizing the spacing between fins and the fin thickness improved fin efficiency. The fins were designed with slots, vortex generators, and bumps to disrupt the boundary layer between the air and the fins, enhancing convective heat transfer. Additionally, guide vanes were designed on the fins to allow fluid to flow more effectively to the fins surrounding the heat exchange tubes, improving fin efficiency. Increasing the outer diameter of the heat exchange tubes from 15.88 mm to 18 mm increased the heat exchange area and fin efficiency, achieving the desired heat transfer effect and resolving the condensate problem.

[0042] This stainless steel surface cooler uses 316L stainless steel heat exchange tubes and fins instead of the original copper tubes and aluminum fins, solving the risk of oxidation and corrosion of copper heat exchange tubes. While not changing the original oven cooling section structure, it increases the heat exchange per unit volume of the surface cooler, making it easier to lower the temperature to the customer's required temperature; it also solves the problem of condensate generation.

[0043] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A stainless steel surface condenser characterized by, It includes an inlet water collection pipe (1), an outlet water collection pipe (2), several stainless steel fins (3), several stainless steel elbows (4), several stainless steel heat exchange tubes (5), and a stainless steel frame (6). Several stainless steel fins (3) are stacked in the stainless steel frame (6); each stainless steel fin (3) has multiple rows of heat exchange holes (7), and several stainless steel heat exchange tubes (5) are inserted in the heat exchange holes (7). Each pair of adjacent stainless steel heat exchange tubes (5) are connected by a stainless steel elbow (4) to connect several stainless steel heat exchange tubes (5) into a heat exchange pipe. The inlet water collection pipe (1) and the outlet water collection pipe (2) are inserted into one end of the stainless steel frame (6); the inlet water collection pipe (1) is connected to one end of the heat exchange pipe, and the outlet water collection pipe (2) is connected to the other end of the heat exchange pipe.

2. The stainless steel surface condenser according to claim 1, characterized in that, The stainless steel fins (3) are provided with slits (9) between each row of heat exchange holes (7); Multiple downstream protrusions (10) are provided between the first row of heat exchange holes (7) and the second row of heat exchange holes (7) on the stainless steel fins (3); A vortex generator (11) is provided between each row of heat exchange holes (7) on the stainless steel fins (3); Multiple guide vanes (12) are evenly spaced on one end sidewall of the stainless steel fin (3).

3. The stainless steel surface condenser according to claim 1, wherein Multiple water outlet holes (8) are provided on the outer walls of both the inlet water collection pipe (1) and the outlet water collection pipe (2).

4. The stainless steel surface condenser according to claim 1, wherein The stainless steel fins (3), the stainless steel elbows (4), and the stainless steel heat exchange tubes (5) are all made of 316L stainless steel.

5. The stainless steel surface condenser according to claim 1, wherein The inner wall of the stainless steel heat exchange tube (5) is provided with multiple turbulence protrusions.

6. The stainless steel surface condenser according to claim 2, wherein The vortex generator (11) is a triangular cone that gradually shrinks from the tail to the head. Two triangular cones form a group, and the heads of the two triangular cones are connected close to each other on the stainless steel fin (3).

7. The stainless steel surface condenser according to claim 2, wherein The guide vane (12) is semi-arc-shaped.

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