Air-cooled heat exchanger
By designing a three-pass heat exchange structure with counter-current air flow and high-temperature water in an air-cooled heat exchanger, the problem of low heat exchange efficiency in existing air-cooled heat exchangers is solved, achieving efficient heat exchange and shortening heat exchange time.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- KAIFENG XINLI BOILER EQUIPMENT CO LTD
- Filing Date
- 2025-05-27
- Publication Date
- 2026-04-24
AI Technical Summary
Existing air-cooled heat exchangers have low heat exchange efficiency, resulting in long heat exchange times.
Design an air-cooled heat exchanger where air is discharged from the outlet of the air collection box and evenly washes the heat exchange structure. High-temperature water and air flow in opposite directions to exchange heat. A three-pass heat exchange method is adopted, and the high-temperature water and air are fully contacted through three water-cooled sections.
It improves heat exchange efficiency, reduces heat exchange time, and promotes heat exchange effect.
Smart Images
Figure CN224163058U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of heat exchanger technology, specifically to an air-cooled heat exchanger. Background Technology
[0002] An air cooler is a device that uses ambient air as the cooling medium, flowing horizontally across the outside of finned tubes to cool or condense the high-temperature process fluid inside the tubes. It is also known as an "air-cooled heat exchanger." Existing air-cooled heat exchangers have low heat exchange efficiency, resulting in long heat exchange times. Therefore, there is an urgent need for an air-cooled heat exchanger to solve these problems. Utility Model Content
[0003] To address the technical problem of low heat exchange efficiency and long heat exchange time in existing air-cooled heat exchangers, this invention provides an air-cooled heat exchanger in which air is discharged from the outlet of the air collection box and evenly washes the heat exchange structure. The high-temperature water in the heat exchange structure is continuously and evenly washed by the air to achieve heat exchange with the air. The air flows in the opposite direction (upward) to exchange heat with the high-temperature water in the heat exchange structure, which promotes heat exchange, results in high heat exchange efficiency, and effectively reduces heat exchange time.
[0004] This utility model provides an air-cooled heat exchanger, including a frame, an air guide assembly, and a water circulation assembly. The air guide assembly includes an air collection box and a fan. The air collection box is fixedly mounted on the frame, and the fan is fixedly mounted outside the air collection box. The air outlet of the fan is fixedly connected to and communicates with the air inlet of the air collection box. The water circulation assembly includes a support frame, an inlet water tank, an outlet water tank, and a heat exchange structure. The support frame is fixedly mounted on the frame and located above the air collection box. The inlet water tank, outlet water tank, and heat exchange structure are fixedly mounted on the support frame. The two ends of the heat exchange structure are fixedly connected to and communicate with the inlet water tank and the outlet water tank, respectively. The heat exchange structure is located above the air outlet of the air collection box.
[0005] Furthermore, the heat exchange structure includes three water-cooled sections, which are sequentially arranged on the support frame along its height and all located above the air outlet of the gas collection box. Each water-cooled section includes at least one row of heat exchange pipes arranged in the same row. These heat exchange pipes are fixedly mounted on the support frame, and both ends of each heat exchange pipe are fixedly connected to and communicate with the inlet and outlet water tanks, respectively. High-temperature water flows sequentially through the three water-cooled sections, while air is discharged from the air outlet of the gas collection box and evenly washes over the three water-cooled sections. The three water-cooled sections achieve a three-pass heat exchange of high-temperature water. This three-pass heat exchange method facilitates sufficient contact between air and high-temperature water, thereby improving heat exchange efficiency.
[0006] Furthermore, the support frame is provided with three sets of fixing parts in sequence along its height direction. Each fixing part includes multiple fixing members that are equally spaced along the length direction of the support frame. Each water-cooling part includes two rows of heat exchange pipes, and the two rows of heat exchange pipes are fixed to multiple fixing members of one fixing part. Each fixing member includes three corrugated plates that are equally spaced along the height direction of the support frame. Each corrugated plate extends along the width direction of the support frame, and a portion of each heat exchange pipe is fixedly disposed between two adjacent corrugated plates.
[0007] Furthermore, the water inlet tank is provided with a first partition plate that divides the interior of the water inlet tank into a first water inlet area and a second water inlet area; the water outlet tank is provided with a second partition plate that divides the interior of the water outlet tank into a first water outlet area and a second water outlet area; both ends of the multiple heat exchange pipes of the upper water cooling section are respectively connected to the first water inlet area and the first water outlet area; both ends of the multiple heat exchange pipes of the middle water cooling section are respectively connected to the first water outlet area and the second water inlet area; and both ends of the multiple heat exchange pipes of the lower water cooling section are respectively connected to the second water inlet area and the second water outlet area.
[0008] Furthermore, the inlet and outlet water tanks are arc-shaped. An inlet pipe is located at the top of the inlet tank, and an outlet pipe is located at the bottom of the outlet tank. Both the inlet and outlet tanks have multiple inspection ports, each with removable sealing plates. High-temperature water from outside enters the inlet tank through the inlet pipe, while cooled water is discharged to the outside of the outlet tank through the outlet pipe. The arc-shaped design of the inlet and outlet tanks, along with the sealing plates, facilitates regular maintenance of both tanks.
[0009] Furthermore, each of the sealing plates is elliptical, each of the sealing plates is located inside the inspection port and its end is sealed, and each of the sealing plates is fixedly provided with a screw, the end of the screw passing through the inspection port to the outside of the inspection port and being fixedly connected to the fixing plate by a nut, the fixing plate being located outside the inspection port and in contact with it.
[0010] Furthermore, both the fan and the air collection box have two air inlets, and the air outlets of the two fans are respectively connected to the air inlets of the two air collection boxes. The purpose of setting two fans is to ensure the air volume of the air collection box and to ensure that the air collection box can discharge air evenly.
[0011] Compared with the prior art, the present invention has the following beneficial effects:
[0012] This utility model discloses an air-cooled heat exchanger. When the fan is activated, it draws outside air into the air collection box. The air is then discharged from the air collection box's outlet, uniformly washing the heat exchange structure. High-temperature water from outside enters the inlet tank. Specifically, the high-temperature water enters the first inlet zone and then flows through multiple heat exchange pipes in the upper water-cooling section to the first outlet zone—this is the first pass heat exchange. After heat exchange in the first outlet zone, the high-temperature water flows through multiple heat exchange pipes in the middle water-cooling section to the second inlet zone—this is the second pass heat exchange. Finally, the high-temperature water in the second inlet zone flows through multiple heat exchange pipes in the lower water-cooling section to the second outlet zone—this is the third pass heat exchange. The high-temperature water in the heat exchange structure achieves heat exchange with the air through continuous and uniform washing by the air (high-temperature water and air exchange heat), resulting in high heat exchange efficiency. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the structure of an air-cooled heat exchanger according to this utility model;
[0014] Figure 2 This is a side sectional view of the air-cooled heat exchanger of this utility model;
[0015] Figure 3 This is a utility model Figure 2 Enlarged structural diagram of A in the middle;
[0016] Figure 4 This is a side sectional view of the sealing plate of this utility model;
[0017] Figure 5 This is a structural schematic diagram of the fixing plate of this utility model;
[0018] The numbers in the attached diagram are:
[0019] 1. Frame; 2. Air collection box; 3. Fan; 4. Support frame; 41. Corrugated plate; 5. Water inlet tank; 51. First partition plate; 52. Water inlet pipe; 6. Water outlet tank; 61. Second partition plate; 62. Water outlet pipe; 7. Heat exchange pipe; 8. Inspection port; 9. Sealing plate; 91. Screw; 92. Fixing plate. Detailed Implementation
[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.
[0021] like Figures 1-5As shown, an air-cooled heat exchanger includes a frame 1, an air guide assembly, and a water circulation assembly. The air guide assembly includes an air collection box 2 and a fan 3. The air collection box 2 is fixedly mounted on the frame 1, and the fan 3 is fixedly mounted outside the air collection box 2. The air outlet of the fan 3 is fixedly connected to and communicates with the air inlet of the air collection box 2. The water circulation assembly includes a support frame 4, an inlet water tank 5, an outlet water tank 6, and a heat exchange structure. The support frame 4 is fixedly mounted on the frame 1 and located above the air collection box 2. The inlet water tank 5, the outlet water tank 6, and the heat exchange structure are fixedly mounted on the support frame 4. The support frame 4 supports and fixes the inlet water tank 5, the outlet water tank 6, and the heat exchange structure. The two ends of the heat exchange structure are fixedly connected to and communicate with the inlet water tank 5 and the outlet water tank 6, respectively. The heat exchange structure is located above the air outlet of the air collection box 2.
[0022] The working process of the air-cooled heat exchanger: High-temperature water from the outside enters the inlet tank 5. The high-temperature water in the inlet tank 5 exchanges heat through the heat exchange structure and the outlet tank 6, becoming cooled water at a certain temperature. The cooled water is finally discharged through the outlet tank 6. The fan 3 starts, drawing outside air into the air collection box 2. The air is then discharged from the outlet of the air collection box 2 and evenly washes the heat exchange structure. The high-temperature water in the heat exchange structure is continuously and evenly washed by the air, achieving heat exchange with the air (high-temperature water and air exchange heat), ultimately cooling the high-temperature water to a certain temperature to meet the demand. In this embodiment, the air flows in the opposite direction (upward) to exchange heat with the high-temperature water in the heat exchange structure, which better promotes heat exchange.
[0023] In this embodiment of the air-cooled heat exchanger, air is discharged from the air outlet of the air collection box 2 and evenly washes the heat exchange structure. The high-temperature water in the heat exchange structure is continuously and evenly washed by the air to achieve heat exchange with the air. The air flows in the opposite direction (upward) to exchange heat with the high-temperature water in the heat exchange structure, which promotes heat exchange, has high heat exchange efficiency, and effectively reduces heat exchange time.
[0024] In one possible implementation, the heat exchange structure includes three water-cooled sections, which are sequentially arranged on the support frame 4 along its height and all located above the air outlet of the air collection box 2. Each water-cooled section includes at least one row of heat exchange pipes 7 arranged in the same row. The heat exchange pipes 7 are fixedly mounted on the support frame 4, and both ends of the heat exchange pipes 7 are fixedly connected to and communicate with the inlet water tank 5 and the outlet water tank 6, respectively. High-temperature water flows sequentially through the three water-cooled sections, and air is discharged from the air outlet of the air collection box 2 and evenly washes the three water-cooled sections. The three water-cooled sections achieve three-pass heat exchange of the high-temperature water. The three-pass heat exchange method is conducive to sufficient contact between air and high-temperature water, thereby improving heat exchange efficiency. Specifically, air is discharged from the air outlet of the air collection box 2 and evenly washes the multiple rows of heat exchange pipes 7. The multiple rows of heat exchange pipes 7 ultimately achieve three-pass heat exchange, and the resistance of the high-temperature water along the pipes is neither too large nor too small, ensuring an appropriate residence time of the high-temperature water in the heat exchange pipes 7 and fully guaranteeing heat exchange.
[0025] Preferably, the heat exchange pipe 7 uses a spiral finned tube, which is beneficial for heat exchange, enhances the heat exchange effect, and thus reduces heat exchange costs. The pipe body of the heat exchange pipe 7 itself is made of aluminum, which is beneficial for corrosion resistance, especially when equipped with air-cooled heat exchangers in coastal areas, as it can delay the corrosion of seawater components in the air; the fins of the heat exchange pipe 7 are made of aluminum alloy.
[0026] In one possible implementation, the support frame 4 is provided with three sets of fixing parts in sequence along its height direction. Each fixing part includes multiple fixing members that are equally spaced along the length direction of the support frame 4. In this embodiment, there are four fixing members. Each water-cooling part includes two rows of heat exchange pipes 7 and the two rows of heat exchange pipes 7 are fixed on multiple (four) fixing members of one fixing part. Each fixing member includes three corrugated plates 41 that are equally spaced along the height direction of the support frame 4. Each corrugated plate 41 extends along the width direction of the support frame 4. A portion of each heat exchange pipe 7 is fixedly disposed between two adjacent corrugated plates 41.
[0027] Taking the two rows of heat exchange pipes 7 located in the upper water-cooled section as an example, the two rows of heat exchange pipes 7 are fixed to the support frame 4 by four fasteners of a fixing part. That is, the four fasteners fix the four positions of the heat exchange pipes 7 and ultimately ensure that the heat exchange pipes 7 remain stable. Part of each row of heat exchange pipes 7 is clamped between two adjacent corrugated plates 41 of a fixing part (three corrugated plates 41 fix the two rows of heat exchange pipes 7). The two adjacent corrugated plates 41 fix the heat exchange pipes 7 as a whole, ensuring that the heat exchange pipes 7 remain stable.
[0028] Preferably, multiple corrugated grooves are evenly arranged on the corrugated plate 41, and the heat exchange pipe 7 is clamped in the corresponding corrugated grooves of two adjacent corrugated plates 41 and kept fixed.
[0029] Preferably, the width of the corrugated plate 41 is much smaller than the length of the heat exchange pipe 7, so that the corrugated plate 41 will not affect the heat exchange of the heat exchange pipe 7.
[0030] In one possible implementation, the water inlet tank 5 is provided with a first partition plate 51, which divides the interior of the water inlet tank 5 into a first water inlet area and a second water inlet area. The water outlet tank 6 is provided with a second partition plate 61, which divides the interior of the water outlet tank 6 into a first water outlet area and a second water outlet area. The two ends of the plurality of heat exchange pipes 7 in the upper water cooling section are respectively connected to the first water inlet area and the first water outlet area. The two ends of the plurality of heat exchange pipes 7 in the middle water cooling section are respectively connected to the first water outlet area and the second water inlet area. The two ends of the plurality of heat exchange pipes 7 in the lower water cooling section are respectively connected to the second water inlet area and the second water outlet area. High-temperature water from the outside enters the first inlet water zone, and then flows through multiple heat exchange pipes 7 (arranged in two rows) in the upper water-cooled section to the first outlet water zone; this is the first pass heat exchange. After heat exchange in the first outlet water zone, the high-temperature water flows through multiple heat exchange pipes 7 (arranged in two rows) in the middle water-cooled section to the second inlet water zone; this is the second pass heat exchange. Finally, the high-temperature water flows through multiple heat exchange pipes 7 (arranged in two rows) in the lower water-cooled section to the second outlet water zone; this is the third pass heat exchange. Air is discharged from the outlet of the air collection box 2 and evenly washes the multiple heat exchange pipes 7 (a total of six rows) in the three water-cooled sections, greatly improving heat exchange efficiency.
[0031] In one possible implementation, the inlet tank 5 and outlet tank 6 are arc-shaped. An inlet pipe 52 is located at the top of the inlet tank 5, and an outlet pipe 62 is located at the bottom of the outlet tank 6. Both the inlet tank 5 and outlet tank 6 have multiple inspection ports 8, and each inspection port 8 is detachably fitted with multiple sealing plates 9, which can be opened or closed. High-temperature water from outside enters the inlet tank 5 through the inlet pipe 52, and cold water cooled to a certain temperature is discharged to the outside of the outlet tank 6 through the outlet pipe 62. The arc-shaped design of the inlet tank 5 and outlet tank 6, along with the inspection pipes and sealing plates 9, facilitates regular maintenance of the inlet tank 5 and outlet tank 6.
[0032] Preferably, valves are installed on the inlet pipe 52 and the outlet pipe 62, and the inlet and outlet of water are realized by opening and closing the valves.
[0033] In one possible implementation, each sealing plate 9 is elliptical and located inside the inspection port 8, sealing its end. A screw 91 is fixedly mounted on each sealing plate 9, with its end passing through the inspection port 8 to the outside and being fixedly connected to a fixing plate 92 via a nut. The fixing plate 92 is located outside and in contact with the inspection port 8, and is U-shaped. Two screws 91 and fixing plates 92 are provided. Preferably, the outer diameter of the sealing plate 9 is larger than the inner diameter of the inspection port 8, allowing the sealing plate 9 to seal the end of the inspection port 8. Loosening the nut and removing the fixing plate 92, and tilting the screw 91, allows the sealing plate 9 to be removed from inside the inspection port 8, enabling inspection of the inlet tank 5 and outlet tank 6. Conversely, tilt the screw 91 and the sealing plate 9 so that the sealing plate 9 passes through the inspection port 8 and is located inside the inspection port 8. Fix the fixing plate 92 to the outside of the inspection port 8 by the screw 91 and the nut, so that the sealing plate 9 seals the end inside the inspection port 8.
[0034] Preferably, the sealing plate 9 is provided with a groove, and the end of the inspection port 8 is engaged in the groove, thus sealing the end of the inspection port 8. Furthermore, a sealing ring is provided in the groove, which contacts the inspection port 8 to prevent water leakage from the inspection port 8.
[0035] In one possible implementation, both the fan 3 and the air collection box 2 have two air inlets, and the air outlets of the two fans 3 are respectively connected to the air inlets of the two air collection boxes 2. The purpose of setting two fans 3 is to ensure the air volume of the air collection box 2 and to ensure that the air collection box 2 can discharge air evenly.
[0036] The embodiments described above are merely preferred embodiments of this utility model and are only used to explain this utility model. They are not intended to limit the scope of implementation of this utility model. For those skilled in the art, other implementation methods can be easily made by substitution or modification based on the technical content disclosed in this specification. Therefore, all changes and improvements made to the principles and process conditions of this utility model should be included within the scope of the patent application of this utility model.
Claims
1. An air-cooled heat exchanger, comprising a frame (1), an air guide assembly, and a water circulation assembly, characterized in that, The air guiding assembly includes an air collection box (2) and a fan (3). The air collection box (2) is fixedly mounted on the frame (1). The fan (3) is fixedly mounted outside the air collection box (2). The air outlet of the fan (3) is fixedly connected to and communicates with the air inlet of the air collection box (2). The water circulation assembly includes a support frame (4), a water inlet tank (5), a water outlet tank (6), and a heat exchange structure. The support frame (4) is fixedly mounted on the frame (1) and located above the air collection box (2). The water inlet tank (5), the water outlet tank (6), and the heat exchange structure are fixedly mounted on the support frame (4). The two ends of the heat exchange structure are fixedly connected to and communicate with the water inlet tank (5) and the water outlet tank (6), respectively. The heat exchange structure is located above the air outlet of the air collection box (2).
2. The air-cooled heat exchanger according to claim 1, characterized in that, The heat exchange structure includes three water-cooled sections, which are arranged sequentially on the support frame (4) along the height direction and are all located above the air outlet of the gas collection box (2). Each water-cooled section includes at least one row of heat exchange pipes (7) arranged in the same row. The heat exchange pipes (7) are fixedly installed on the support frame (4), and both ends of the heat exchange pipes (7) are fixedly connected to and communicate with the inlet tank (5) and the outlet tank (6) respectively.
3. The air-cooled heat exchanger according to claim 2, characterized in that, The support frame (4) is provided with three sets of fixing parts in sequence along its height direction. Each fixing part includes multiple fixing members that are equally spaced along the length direction of the support frame (4). Each water-cooling part includes two rows of heat exchange pipes (7) and the two rows of heat exchange pipes (7) are fixed on multiple fixing members of a fixing part. Each fixing member includes three corrugated plates (41) that are equally spaced along the height direction of the support frame (4). Each corrugated plate (41) extends along the width direction of the support frame (4). A portion of each heat exchange pipe (7) is fixedly arranged between two adjacent corrugated plates (41).
4. The air-cooled heat exchanger according to claim 3, characterized in that, The water inlet tank (5) is provided with a first partition plate (51) inside, which divides the inside of the water inlet tank (5) into a first water inlet area and a second water inlet area. The water outlet tank (6) is provided with a second partition plate (61) inside, which divides the inside of the water outlet tank (6) into a first water outlet area and a second water outlet area. The two ends of the multiple heat exchange pipes (7) of the upper water cooling section are respectively connected to the first water inlet area and the first water outlet area. The two ends of the multiple heat exchange pipes (7) of the middle water cooling section are respectively connected to the first water outlet area and the second water inlet area. The two ends of the multiple heat exchange pipes (7) of the lower water cooling section are respectively connected to the second water inlet area and the second water outlet area.
5. The air-cooled heat exchanger according to claim 1, characterized in that, The inlet tank (5) and outlet tank (6) are arc-shaped. The top of the inlet tank (5) is provided with an inlet pipe (52), and the bottom of the outlet tank (6) is provided with an outlet pipe (62). Both the inlet tank (5) and the outlet tank (6) are provided with multiple inspection ports (8), and each inspection port (8) can be detachably provided with multiple sealing plates (9).
6. The air-cooled heat exchanger according to claim 5, characterized in that, Each of the sealing plates (9) is elliptical and is located inside the inspection port (8) and its end is sealed. Each of the sealing plates (9) is fixedly provided with a screw (91). The end of the screw (91) passes through the inspection port (8) to the outside of the inspection port (8) and is fixedly connected to the fixing plate (92) by a nut. The fixing plate (92) is located outside the inspection port (8) and in contact with it.
7. The air-cooled heat exchanger according to claim 1, characterized in that, The fan (3) and the air collection box (2) each have two air inlets, and the air outlets of the two fans (3) are respectively connected to the air inlets of the two air collection boxes (2).