Heat source tower with high heat exchange efficiency

Abstract

The utility model discloses a heat source tower with high heat exchange efficiency, which belongs to the technical field of heat source towers and comprises a tower body, a liquid collecting box, a liquid receiving component, a heat exchange component and a spraying component are arranged in the tower body, an air inlet and an air outlet barrel are arranged on the tower body, a fan is arranged in the air outlet barrel, and the liquid receiving component comprises a liquid receiving disc and a liquid receiving barrel. A first branch pipe and a second branch pipe are arranged on the side wall of the liquid receiving cylinder, a third branch pipe is connected to the second branch pipe, and the heat exchange assembly comprises a heat exchange coil pipe, a first fin set and a second fin set, and the first fin set and the second fin set are connected with the outer wall of the heat exchange coil pipe. The heat exchange efficiency of the heat exchange assembly is improved, and frosting in winter is reduced; upward air flow is converted into rotational flow, the contact time of the air flow and fins of the heat exchange assembly is prolonged, the heat exchange efficiency is improved, most of the fins of the heat exchange assembly can participate in heat exchange work, defrosting can be conducted on the first fin set in a targeted mode, and the defrosting efficiency is improved; and the cooling efficiency of the heat exchange medium in summer is improved.

Description

Technical Field

[0001] This utility model belongs to the field of heat source tower technology, specifically relating to a heat source tower with high heat exchange efficiency. Background Technology

[0002] A heat source tower is a tower-type heat exchange device mainly used to extract or release heat energy from the air. In winter, the heat source tower uses a heat exchange medium with a freezing point below zero to extract low-grade heat energy from air with relatively high humidity in a low-temperature environment. In summer, the heat source tower is used as a cooling tower, using the air to dissipate heat from the high-temperature heat exchange medium and release the heat into the atmosphere. Chinese patent CN 101281001 B discloses a closed-loop heat source tower, which uses the coils of a heat exchanger connected to an external heat exchange medium to achieve heating in winter and cooling in summer. However, the heat exchange efficiency of this type of heat exchanger is not high, and if the fin arrangement density of the heat exchanger is increased, frost easily forms on the fins in winter. Utility Model Content

[0003] The technical problem solved by this utility model is to provide a heat source tower with high heat exchange efficiency to improve the heat exchange efficiency between air and heat exchange medium.

[0004] Technical solution: To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0005] A heat source tower with high heat exchange efficiency includes a tower body. The tower body is provided with a liquid collection tank, a liquid receiving assembly communicating with the liquid collection tank, a heat exchange assembly disposed above the liquid receiving assembly, and a spray assembly for spraying liquid onto the heat exchange assembly. The tower body is provided with an air inlet and an air outlet. A fan is provided in the air outlet. The liquid receiving assembly includes a liquid receiving tray located below the heat exchange assembly and a liquid receiving cylinder communicating with the liquid receiving tray. The side wall of the liquid receiving cylinder is provided with a first branch pipe and a second branch pipe located above the first branch pipe. A third branch pipe communicating with the liquid collection tank is connected to the second branch pipe. The heat exchange assembly includes a heat exchange coil and a first fin assembly and a second fin assembly connected to the outer wall of the heat exchange coil.

[0006] Furthermore, the tower body is equipped with a swirl plate, which is located above the air inlet.

[0007] Furthermore, the swirl plate includes a central blind plate, an inner ring, an outer ring, a first blade disposed between the blind plate and the inner ring, and a second blade disposed between the inner ring and the outer ring.

[0008] Furthermore, the spray assembly includes a circulation pump, a spray pipe connected to the circulation pump, and a first nozzle disposed on the spray pipe.

[0009] Furthermore, the swirl plate is provided with a second nozzle connected to the circulating pump, and the second nozzle faces the heat exchange assembly.

[0010] Furthermore, the spray pipe penetrates the tower body, one end of the spray pipe is connected to the circulating pump, and the other end of the spray pipe is equipped with a first switch valve.

[0011] Furthermore, the second fin group is located above the first fin group, and the fin arrangement density of the first fin group is less than that of the second fin group.

[0012] Furthermore, a demister is provided inside the tower, and the demister is located above the spray pipe.

[0013] Furthermore, the first branch pipe is equipped with a drain valve, the second branch pipe is equipped with a second switch valve, and the third branch pipe is equipped with a third switch valve.

[0014] Furthermore, the heat exchange coil is provided with a first interface tube and a second interface tube.

[0015] Beneficial effects: Compared with the prior art, the present invention has the following advantages:

[0016] 1. By setting up a first fin group and a second fin group, the fin arrangement density of the second fin group is increased, which improves the heat exchange efficiency of the heat exchange component. The fin arrangement density of the first fin group is smaller, which reduces frost formation in winter.

[0017] 2. A swirl plate is installed below the heat exchange component to transform the upward airflow into a swirling flow, increasing the contact time between the airflow and the fins of the heat exchange component, improving the heat exchange efficiency, and increasing the contact area between the airflow and the fins, so that most of the fins of the heat exchange component can participate in the heat exchange work. The swirl plate can also remove mist droplets from the upward airflow.

[0018] 3. Set a first nozzle and a second nozzle. The first nozzle is set above the second fin group to defrost the second fin group. The second nozzle is set on the swirl plate facing the first fin group to defrost the first fin group and improve defrosting efficiency.

[0019] 4. The spray pipe runs through the tower body. In summer, the external heat exchange medium can be sprayed into the tower through the first nozzle to exchange heat with the upward airflow in a countercurrent manner, thereby improving the cooling efficiency of the heat exchange medium in summer. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the heat source tower according to an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the liquid-receiving component structure in the embodiment;

[0022] Figure 3 This is a schematic diagram of the heat exchange component structure in the embodiment;

[0023] Figure 4 This is a schematic diagram of the spray assembly structure in the embodiment;

[0024] Figure 5 This is a top view of the swirl plate structure in the embodiment. Detailed Implementation

[0025] The present invention will be further illustrated below with reference to specific embodiments. The embodiments are implemented on the premise of the technical solution of the present invention. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0026] like Figure 1 As shown, a heat source tower with high heat exchange efficiency includes a tower body 1, which is generally rectangular. Inside the tower body 1 are a liquid collection tank 2, a liquid receiving assembly 3, a heat exchange assembly 4, a spray assembly 5, a fan 6, a swirl plate 7, and a demister 8. The liquid collection tank 2 is located at the bottom of the tower body 1. The liquid receiving assembly 3 is located above the liquid collection tank 2 and communicates with it. The swirl plate 7 is located above the liquid receiving assembly 3. The heat exchange assembly 4 is located above the swirl plate 7. The demister 8 is located on the heat exchange assembly 4. The spray assembly 5 is used to spray liquid onto the heat exchange assembly 4. The side wall of the tower body 1 is provided with an air inlet 11, which is located above the liquid receiving assembly 3 and below the swirl plate 7. The air inlet 11 is provided with multiple horizontally arranged blades to form louvers. External air enters the tower body 1 through the air inlet 11. The top of the tower body 1 is provided with an air outlet duct 12, and the fan 6 is installed in the air outlet duct 12. The fan 6 exhausts air outward, thereby creating suction at the air inlet 11 to draw external air into the tower body 1.

[0027] like Figure 1 and Figure 4 As shown, the liquid collection tank 2 stores a solution. The spray assembly 5 includes a circulation pump 51, a spray pipe 52, and a first nozzle 53. The circulation pump 51 is located above the liquid collection tank 2. The inlet end of the circulation pump 51 is connected to the liquid collection tank 2 through a suction pipe, thereby pumping the solution out of the liquid collection tank 2. One end of the spray pipe 52 is connected to the circulation pump 51 through a first intermediate pipe 56, and the other end of the spray pipe 52 passes through the tower body 1. The part of the spray pipe 52 located inside the tower body 1 is provided with multiple first nozzles 53. The first nozzles 53 face the heat exchange assembly 4. When the circulation pump 51 is working, it pumps the solution to the first nozzles 53 and sprays it out. The end of the spray pipe 52 connected to the first intermediate pipe 56 is provided with an eleventh switch valve 58, and the other end of the spray pipe 52 is provided with a first switch valve 55. Both the eleventh switch valve 58 and the first switch valve 55 are located outside the tower body 1.

[0028] like Figure 1 and Figure 3As shown, the heat exchange assembly 4 includes a heat exchange coil 41, a first fin group 42, and a second fin group 43. The heat exchange coil 41 is provided with a first interface pipe 411 and a second interface pipe 412. Both the first interface pipe 411 and the second interface pipe 412 are located outside the tower body 1 for connecting to external pipelines, such as the heat exchanger pipelines of a heat pump. The middle section of the heat exchange coil 41 forms multiple bends in the tower body 1. The first fin group 42 and the second fin group 43 are both connected to the outer wall of the heat exchange coil 41. The two-fin group 43 can increase the heat exchange area of ​​the heat exchange coil 41. The second fin group 43 is located above the first fin group 42. The fin arrangement density of the first fin group 42 is less than that of the second fin group 43. In this embodiment, the fin spacing in the first fin group 42 is 8mm and the fin spacing in the second fin group 43 is 4mm. During operation, under the action of the fan 6, the airflow passes through the first fin group 42 and the second fin group 43 from bottom to top, thereby exchanging heat with the medium in the heat exchange coil 41.

[0029] like Figure 1 and Figure 5 As shown, the swirl plate 7 is located above the air inlet 11. The swirl plate 7 includes a central blind plate 71, an inner ring 72, an outer ring 73, a first blade 74, and a second blade 75. The swirl plate 7 is rectangular in shape and corresponds to the shape of the tower body 1. The central blind plate 71 is a circular plate. The first blade 74 is disposed between the blind plate 71 and the inner ring 72. Multiple first blades 74 are arranged in a ring array on the central blind plate 71. The outer ends of the first blades 74 are connected to the inner ring 72. The second blades 75 are disposed between the inner ring 72 and the outer ring 73. The second blades 75 are arranged in a ring array on the outer circumference of the inner ring 72. The outer ends of multiple second blades 75 are connected to the inner wall of the outer ring 73. When the air entering the air inlet 11 passes upward through the swirl plate 7, the upward airflow is converted into a swirling flow under the action of the two types of blades of the swirl plate 7, which increases the contact time with the fins of the heat exchange component 4. Furthermore, the rotating airflow can contact the fins of the heat exchange component 4 at all points in the tower body 1, preventing the airflow from only contacting some of the fins when it passes through the heat exchange component 4 quickly, thus increasing the contact area between the airflow and the fins. The swirl plate 7 is provided with a second nozzle 54 connected to the circulating pump 51. In this embodiment, multiple second nozzles 54 are arranged on the inner ring 72 and distributed in a ring array. The second nozzles 54 face upward toward the first fin group 42 of the heat exchange assembly 4. The inner ring 72 is made of a hollow water pipe. The inner ring 72 is connected to the first intermediate pipe 56 through the second intermediate pipe 57. The solution is sprayed from the second intermediate pipe 57 through the inner ring 72 at the second nozzle 54. The solution sprayed from the second nozzle 54 can defrost the lower end of the first fin group 42.

[0030] like Figure 1 and Figure 2As shown, the liquid receiving assembly 3 includes a liquid receiving tray 31, a liquid receiving cylinder 32, a first branch pipe 33, a second branch pipe 34, and a third branch pipe 35. The liquid receiving tray 31 is located below the swirl plate 7 and lower than the lower end of the air inlet 11. The solution sprayed from the first nozzle 53 falls onto the liquid receiving tray 31 after passing through the heat exchange assembly 4 and the swirl plate 7. The liquid receiving cylinder 32 is connected to the liquid receiving tray 31, and the solution on the liquid receiving tray 31 flows into the liquid receiving cylinder 32. The first branch pipe 33 is located on the side wall of the liquid receiving cylinder 32 and is close to the bottom. A drain valve 331 is provided on the first branch pipe 33, and the liquid can be discharged by opening the drain valve 331. The solution at the bottom of the receiving cylinder 32 has a high water content. The second branch pipe 34 is located on the side wall of the receiving cylinder 32 and is close to the top. The second branch pipe 34 is equipped with a second switch valve 342. By opening the second switch valve 342, the solution in the receiving cylinder 32 can be discharged to the outside. The second branch pipe 34 is connected to a third branch pipe 35 that communicates with the liquid collection tank 2. The lower end outlet of the third branch pipe 35 is located in the liquid collection tank 2. The third branch pipe 35 is equipped with a third switch valve 353. By opening the third switch valve 353, the solution in the receiving cylinder 32 can be discharged into the liquid collection tank 2, which facilitates the circulation of the solution.

[0031] like Figure 1 As shown, the demister 8 is located at the top of the tower body 1, above the spray pipe 52. The demister 8 adopts the existing baffle plate type demister to remove solution droplets in the upward airflow.

[0032] In this embodiment, when the heat source tower is used in winter, the heat exchange coil 41 is connected to an external pipeline. The medium of the external heat pump's heat exchanger enters the heat exchange coil 41 from the first interface pipe 411. For example, the heat exchange medium at -3℃ exchanges heat with the air entering through the air inlet 11. The air temperature is between 2℃ and 5℃. The medium absorbs heat from the air and, after heat exchange, its temperature rises to 0℃, flowing out from the second interface pipe 412 back into the external heat exchanger, thereby raising the temperature of the heat exchange medium. When defrosting is required for the first fin group 42 and the second fin group 43, the corresponding valve is opened, and the first nozzle 53 or the second nozzle 54 operates, spraying a solution to defrost the corresponding fins. Generally, the first fin group 42, located at the lower end, is more prone to frosting. The second nozzle 54 can target the defrosting, resulting in a better defrosting effect.

[0033] In this embodiment, when the heat source tower is used in summer, the heat exchange coil 41 is closed, the eleventh switch valve 58 is closed, the first switch valve 55 is open, and the spray pipe 52 is connected to the external heat exchanger. The external heat exchange medium enters the tower body 1 through the spray pipe 52 and the first nozzle 53. For example, the heat exchange medium at 42°C exchanges heat with the air entering through the air inlet 11. The air temperature is between 28°C and 35°C. The gas and liquid are fully mixed, and the air absorbs the heat from the heat exchange medium. After heat exchange, the temperature of the heat exchange medium decreases and flows out from the second branch pipe 34 back to the external heat exchanger, thereby achieving the cooling of the heat exchange medium.

[0034] When the concentration of the solution (antifreeze) in the heat source tower decreases, an antifreeze concentration device can be used to concentrate the antifreeze solution. For example, the publication number of the applicant's application is CN 113908570 A, entitled "A Concentration Device for Antifreeze in Heat Source Towers". This device is used to remove water from the antifreeze, increase the concentration of the antifreeze, and thus lower the freezing point of the antifreeze.

[0035] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A heat source tower with high heat exchange efficiency, characterized in that, The tower includes a tower body (1), which contains a liquid collection tank (2), a liquid receiving assembly (3) connected to the liquid collection tank (2), a heat exchange assembly (4) located above the liquid receiving assembly (3), and a spray assembly (5) for spraying liquid onto the heat exchange assembly (4). The tower body (1) has an air inlet (11) and an air outlet (12), and the air outlet (12) contains a fan (6). The liquid receiving assembly (3) includes a liquid receiving tray located below the heat exchange assembly (4). 31) and a receiving tube (32) connected to the receiving tray (31), the receiving tube (32) has a first branch pipe (33) on its side wall and a second branch pipe (34) located above the first branch pipe (33), the second branch pipe (34) is connected to a third branch pipe (35) connected to the collecting tank (2), the heat exchange assembly (4) includes a heat exchange coil (41) and a first fin group (42) and a second fin group (43) connected to the outer wall of the heat exchange coil (41).

2. The heat source tower with high heat exchange efficiency according to claim 1, characterized in that, The tower body (1) is provided with a swirl plate (7), which is located above the air inlet (11).

3. The heat source tower with high heat exchange efficiency according to claim 2, characterized in that, The swirl plate (7) includes a central blind plate (71), an inner ring (72), an outer ring (73), a first blade (74) disposed between the blind plate (71) and the inner ring (72), and a second blade (75) disposed between the inner ring (72) and the outer ring (73).

4. The heat source tower with high heat exchange efficiency according to claim 3, characterized in that, The spray assembly (5) includes a circulation pump (51), a spray pipe (52) connected to the circulation pump (51), and a first nozzle (53) disposed on the spray pipe (52).

5. The heat source tower with high heat exchange efficiency according to claim 4, characterized in that, The swirl plate (7) is provided with a second nozzle (54) connected to the circulating pump (51), and the second nozzle (54) faces the heat exchange assembly (4).

6. The heat source tower with high heat exchange efficiency according to claim 4, characterized in that, The spray pipe (52) penetrates the tower body (1), one end of the spray pipe (52) is connected to the circulating pump (51), and the other end of the spray pipe (52) is provided with a first switch valve (55).

7. The heat source tower with high heat exchange efficiency according to claim 1, characterized in that, The second fin group (43) is located above the first fin group (42), and the fin arrangement density of the first fin group (42) is less than that of the second fin group (43).

8. The heat source tower with high heat exchange efficiency according to claim 4, characterized in that, The tower body (1) is equipped with a demister (8), which is located above the spray pipe (52).

9. The heat source tower with high heat exchange efficiency according to claim 1, characterized in that, The first branch pipe (33) is provided with a drain valve (331), the second branch pipe (34) is provided with a second switch valve (342), and the third branch pipe (35) is provided with a third switch valve (353).

10. The heat source tower with high heat exchange efficiency according to claim 1, characterized in that, The heat exchange coil (41) is provided with a first interface tube (411) and a second interface tube (412).

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