CN112484538A - Air cooler - Google Patents

Air cooler Download PDF

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Publication number
CN112484538A
CN112484538A CN202011505290.7A CN202011505290A CN112484538A CN 112484538 A CN112484538 A CN 112484538A CN 202011505290 A CN202011505290 A CN 202011505290A CN 112484538 A CN112484538 A CN 112484538A
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CN
China
Prior art keywords
tube
heat exchange
cavity
air
outer tube
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Pending
Application number
CN202011505290.7A
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Chinese (zh)
Inventor
李召
王春香
陆伟成
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Hangzhou Esquel Electrical Manufacturing Co ltd
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Hangzhou Esquel Electrical Manufacturing Co ltd
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Priority to CN202011505290.7A priority Critical patent/CN112484538A/en
Publication of CN112484538A publication Critical patent/CN112484538A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
    • F28D7/1607—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation with particular pattern of flow of the heat exchange media, e.g. change of flow direction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/40—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only inside the tubular element
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
    • F28F13/12—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by creating turbulence, e.g. by stirring, by increasing the force of circulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/04—Arrangements for sealing elements into header boxes or end plates
    • F28F9/06—Arrangements for sealing elements into header boxes or end plates by dismountable joints
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/24—Arrangements for promoting turbulent flow of heat-exchange media, e.g. by plates

Abstract

The application discloses air cooler, including cooling barrel and cooling body. The cooling mechanism comprises a first mounting plate, a second mounting plate and an inner fin heat exchange tube, the first mounting plate and the second mounting plate are mounted in a cooling cylinder body, a cavity in the cooling cylinder body is sequentially divided into a first cavity, a second cavity and a third cavity, the cooling cylinder body is provided with a water inlet and a water outlet which are communicated with the second cavity, two ends of the inner fin heat exchange tube are respectively mounted on the first mounting plate and the second mounting plate, the inner fin heat exchange tube comprises an outer tube and an inner fin tube embedded in the outer tube, the outer tube is a pipeline with a circular cross section, the inner fin tube is a pipeline with a corrugated cross section, a first fluid channel communicated with the first cavity and the third cavity is formed in the inner cavity of the inner fin tube, and a second fluid channel communicated with the second cavity is formed between the inner fin. The air cooler provided by the invention can reduce the fluid resistance, reduce the pressure drop of compressed air, reduce the flow dead zone and increase the heat exchange effect.

Description

Air cooler
Technical Field
The invention relates to the technical field of air treatment equipment, in particular to an air cooler.
Background
The heat exchanger is an energy-saving device for transferring heat between materials between two or more fluids with different temperatures, and is used for transferring heat from the fluid with higher temperature to the fluid with lower temperature to make the temperature of the fluid reach the index specified by the process so as to meet the requirements of process conditions, and is also one of main devices for improving the utilization rate of energy. The air cooler is a heat exchanger that cools high-temperature air using low-temperature water. What traditional air cooler adopted is outer fin heat exchanger, the fin side is shell side is walked to the air, low temperature water walks the heat exchange tube inboard and is the tube side, intraductal low temperature water carries out the heat transfer through pipe wall and fin and the high temperature air of outside of tubes, and in addition for increasing heat exchange efficiency, the baffling board can be add usually to the shell side, so that increase the heat exchange efficiency of shell side air, but can lead to the increase of the pressure drop of compressed air in the shell side, the flow dead zone is many, the poor scheduling problem of heat exchange efficiency.
Disclosure of Invention
The invention provides an air cooler aiming at the problems, which can reduce the fluid resistance, reduce the pressure drop of compressed air, reduce the flow dead zone and increase the heat exchange effect.
The technical scheme adopted by the invention is as follows: the invention provides an air cooler which comprises a cooling cylinder and a cooling mechanism. The cooling cylinder body is provided with a cavity, an air inlet and an air outlet, and the air inlet and the air outlet are communicated with the cavity. The cooling mechanism comprises a first mounting plate, a second mounting plate and one or more inner fin heat exchange tubes, the first mounting plate and the second mounting plate are mutually installed in the cooling cylinder at intervals, the air inlet and the air outlet are sequentially separated into a first chamber, a second chamber and a third chamber which are mutually independent by the cavity, the position of the cooling cylinder corresponding to the second chamber is provided with a water inlet and a water outlet, the two ends of all the inner fin heat exchange tubes are respectively installed on the first mounting plate and the second mounting plate, the inner fin heat exchange tubes comprise outer tubes and inner fin tubes embedded in the outer tubes, the outer tubes are circular tubes with cross sections, the inner fin tubes are tubes with cross sections in corrugated shapes, and the inner fin tubes are hollow to form a first fluid channel, and a second fluid channel is formed between the inner finned tube and the outer tube, the first fluid channel is communicated with the first chamber and the third chamber, and the second fluid channel is communicated with the second chamber.
In an embodiment of the invention, the inner finned tube includes peaks and valleys, the peaks protrude toward the outer tube and abut against the inner wall of the outer tube, and the valleys protrude toward the inside of the inner finned tube. The wave crests and the wave troughs are arc-shaped or flat-plate-shaped.
In an embodiment of the present invention, the width d of the trough3Greater than the width d of the wave crest4。
In an embodiment of the present invention, a distance d between the peak and the trough5Is the radius r of the inner finned tube10.6-0.8 times of the total weight of the powder. The number of the wave crests and the wave troughs is equal and is 14-18.
In an embodiment of the invention, the number of the inner fin heat exchange tubes is multiple, all the inner fin tubes are parallel to each other, and the cross sections formed by all the inner fin tubes are regular polygons.
In an embodiment of the invention, the distance d between the centers of two adjacent inner-fin heat exchange tubes1Is the diameter d of the inner fin heat exchange tube21.3 to 1.4 times of the total weight of the composition.
In an embodiment of the present invention, the water outlet is close to the air inlet, and the water inlet is close to the air outlet.
In an embodiment of the present invention, a fan is disposed at the air inlet in the cooling cylinder.
In an embodiment of the present invention, one or more baffles are disposed on the inner wall of the cooling cylinder at a position corresponding to the second chamber.
In an embodiment of the present invention, the inner finned tube is expanded to the outer tube.
The invention has the beneficial effects that: according to the air cooler provided by the invention, when compressed air is cooled, high-temperature air enters the first cavity from the air inlet, low-temperature water enters the second cavity from the water inlet, the first fluid channel in the inner fin tube is communicated with the first cavity, the high-temperature air in the first cavity enters the first fluid channel (namely the tube side of the inner fin heat exchange tube), the second fluid channel formed between the outer tube and the inner fin tube is communicated with the second cavity, the low-temperature water enters the second fluid channel (namely the shell side of the inner fin heat exchange tube), the whole cooling mechanism is immersed in low-temperature water without dead angles, the high-temperature air in the tube side is contacted with the low-temperature water in the shell side, and the heat exchange between the high-temperature air and the low-temperature water can be realized. In addition, the cross section of interior finned tube is the ripple shape, can increase the area of contact of interior finned tube for high-temperature air fully contacts with low temperature water, can realize high-temperature air's cooling effectively, need not set up the baffling board on the inner wall of interior finned tube in addition, can avoid the increase of pressure drop of compressed air in the tube side, the many scheduling problems of flow blind spot.
Drawings
FIG. 1 is a schematic structural view of an air cooler according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of an air cooler of an embodiment of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 2 at A;
fig. 4 is a cross-sectional view of an internally finned heat exchange tube according to one embodiment of the present invention.
The figures are numbered: 1. cooling the cylinder; 2. a cooling mechanism; 3. a fan; 11. a cavity; 12. an air inlet; 13. an air outlet; 14. a water inlet; 15. a water outlet; 16. a flow guide surface; 17. a baffle plate; 21. a first mounting plate; 22. a second mounting plate; 23. an inner fin heat exchange tube; 231. an outer tube; 232. an inner finned tube; 233. a first fluid channel; 234. a second fluid passage; 232a, wave crest; 232b, wave trough; 111. a first chamber; 112. a second chamber; 113. a third chamber; d1The distance between the centers of two adjacent inner fin heat exchange tubes is equal to the distance between the centers of two adjacent inner fin heat exchange tubes; d2The diameter of the heat exchange tube with the inner fins; d3Is the width of the trough; d4Is the width of the peak; d5Is the wave peak andthe distance between the troughs; r is1The radius of the inner finned tube; the arrows indicate the direction of air flow.
Detailed Description
The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the invention are shown.
Referring to fig. 1-4, the present invention provides an air cooler, which includes a cooling cylinder 1 and a cooling mechanism 2. The cooling cylinder 1 has a cavity 11, an air inlet 12, and an air outlet 13, and both the air inlet 12 and the air outlet 13 are communicated with the cavity 11. The cooling mechanism 2 comprises a first mounting plate 21, a second mounting plate 22 and one or more inner fin heat exchange tubes 23, wherein the first mounting plate 21 and the second mounting plate 22 are mounted in the cooling cylinder 1 at intervals, the cavity 11 between the air inlet 12 and the air outlet 13 is sequentially divided into a first chamber 111, a second chamber 112 and a third chamber 113 which are independent of each other, a water inlet 14 and a water outlet 15 are arranged at the position of the cooling cylinder 1 corresponding to the second chamber 112, both ends of all the inner fin heat exchange tubes 23 are respectively mounted on the first mounting plate 21 and the second mounting plate 22, the inner fin heat exchange tubes 23 comprise an outer tube 231 and inner fin tubes 232 embedded in the outer tube 231, the outer tube 231 is a tube with a circular cross section, the inner fin tubes 232 are tubes with a corrugated cross section, a first fluid channel 233 is formed in the inner fin tubes 232 in a hollow manner, and a second fluid channel 234 is formed between the inner fin tubes 232 and the outer tube 231, the first fluid passage 233 communicates with the first chamber 111 and the third chamber 113, and the second fluid passage 234 communicates with the second chamber 112.
When the compressed air is cooled, high-temperature air enters the first chamber 111 from the air inlet 12, low-temperature water enters the second chamber 112 from the water inlet 14, the first fluid channel 233 in the inner finned tube 232 is communicated with the first chamber 111, the high-temperature air in the first chamber 111 enters the first fluid channel 233 (namely, the tube side of the inner finned heat exchange tube 23), the second fluid channel 234 formed between the outer tube 231 and the inner finned tube 232 is communicated with the second chamber 112, and the low-temperature water enters the second fluid channel 234 (namely, the shell side of the inner finned heat exchange tube 23). In addition, the cross section of interior finned tube 232 is the ripple shape, can increase the area of contact of interior finned tube 232 for high-temperature air fully contacts with low temperature water, can realize high-temperature air's cooling effectively, need not set up baffling board 17 on the inner wall of interior finned tube 232 in addition, can avoid the increase of pressure drop of compressed air in the tube side, the many scheduling problems of flow blind spot.
Wherein, the outer pipe 231 is provided with water passing holes, so that the low-temperature water in the second chamber 112 can enter the second fluid channel 234, and the low-temperature water in the second chamber 112 and the second fluid channel 234 can flow and exchange in time. The inner finned tube 232 penetrates through the first mounting plate 21 and the second mounting plate 22, so that the first cavity, the first fluid channel 233 and the third cavity form a communicated structure.
The inner fin tube 232 includes a peak 232a and a valley 232b, the peak 232a is protruded toward the outer tube 231 and abuts against the inner wall of the outer tube 231, and the valley 232b is protruded toward the inside of the inner fin tube 232. The peaks 232a and valleys 232b are circular arc-shaped or flat plate-shaped.
Width d of trough 232b3Greater than width d of peak 232a4. The gaps between every two wave crests 232a are small, a small amount of high-temperature air can be contained, the gaps in every wave trough 232b are large, a large amount of low-temperature water can be contained, and the low-temperature water can effectively realize heat exchange with the high-temperature air.
Distance d between wave crest 232a and wave trough 232b5Is the radius r of the inner finned tube 23210.6-0.8 times of the total weight of the powder. The structural strength of the inner finned tube 232 can be ensured, and the heat exchange area of the inner finned tube 232 can be relatively large.
The number of the wave crests 232a and the wave troughs 232b is equal, and the number of the wave crests 232a and the wave troughs 232b is 14-18. The number of the wave crests 232a is less than 14, the number of the wave crests 232a is too small, the heat exchange area of the inner finned tube 232 is small, and the heat exchange efficiency is influenced; if the number of the peaks 232a is larger than 18, the number of the peaks 232a is too large, which results in small gaps in the valleys 232b and affects the heat exchange effect.
The number of the inner fin heat exchange tubes 23 is plural, all the inner fin tubes 232 are parallel to each other, and the cross section formed by all the inner fin tubes 232 is a regular polygon. Specifically, the arrangement of the inner fin heat exchange tubes 23 in the cooling mechanism 2 is a regular polygonal structure (the cross section formed by all the inner fin tubes 232 is a regular polygon) such as a regular triangular arrangement, a regular quadrangle, a regular pentagon, a regular hexagon, and the like. Each side edge of the cooling mechanism 2 can be spaced from the inner wall of the cooling cylinder 1 by a proper distance, so that the first chamber 111 can be filled with enough low-temperature water for cooling, and the heat exchange uniformity of the inner fin heat exchange tubes 23 at all positions of the cooling mechanism 2 is ensured.
The center distance d between two adjacent inner fin heat exchange tubes 231Diameter d of inner finned heat exchange tube 2321.3 to 1.4 times of the total weight of the composition. When d is1/d2When the heat exchange efficiency is less than 1.3, the distance between two adjacent inner fin heat exchange tubes 23 is too small (the inner fin heat exchange tubes 23 are arranged too densely), so that the space is saved, but the heat exchange effect is poor; when d is1/d2When the heat exchange efficiency is larger than 1.4, the distance between two adjacent inner fin heat exchange tubes 23 is too large (the inner fin heat exchange tubes 23 are arranged too sparsely), so that the heat exchange effect is ensured, but the occupied space is large; when d is1/d2When the heat exchange area is larger than 1.3 and smaller than 1.4, the distance between every two adjacent inner fin heat exchange tubes 23 is appropriate, the heat exchange effect can be guaranteed, and the occupied space is relatively reasonable.
The water outlet 15 is close to the air inlet 12, the water inlet 14 is close to the air outlet 13, that is, the flow directions of the high-temperature air and the low-temperature water are different (that is, the water flows reversely), the low-temperature water at the water inlet 14 is not subjected to heat exchange, the temperature of the low-temperature water is lower than that of the water at the water outlet 15, and after the air at the air outlet 13 is subjected to heat exchange, the temperature of the air is lower than that of the high-temperature. The same cooling mechanism 2 has the same flow direction (i.e., parallel flow) with respect to the high-temperature air and the low-temperature water, and the heat exchange area required for the reverse flow is small.
In addition, water inlet 14 is located the downside of cooling barrel 1, and delivery port 15 is located the upside of cooling barrel 1, and water can only follow delivery port 15 and flow out after the second cavity is full of, and it is stable to go out water, and enables low temperature hydroenergy and can be full of the second cavity, guarantees that hydroenergy in the second cavity can enter into the shell side of interior fin heat exchange tube 23 and fully contact with high temperature air.
The fan 3 is arranged at the air inlet 12 in the cooling cylinder 1. The fan 3 can uniformly distribute the compressed air in the first chamber 111 to make the air not concentrated, thereby reducing the flow dead zone and uniformly distributing the air flow in the first fluid channel 233 of each inner fin heat exchange tube 23. The fan 3 has 24 blades, each blade is inclined in the same direction, and the inclination angle of each blade is 35 °, and the air blowing effect of the fan 3 is excellent. But not limited thereto, the number of blades of the fan 3 may also be adjusted according to the size of the cooling cylinder, and the embodiment of the present invention is not particularly limited thereto.
Flow guide surfaces 16 are arranged at the air inlet 12 and the air outlet 13 in the cooling cylinder body 1. The flow guide surface 16 at the air inlet 12 can guide the entering compressed air into the inner finned tube 232 of the cooling mechanism 2; the flow guide surface 16 at the air outlet 13 can guide the cooled compressed air to the air outlet 13 for discharge. The flow guide surface 16 can be an arc flow guide surface 16, and the air inlet 12 and the cooling cylinder 1 and the air outlet 13 and the cooling cylinder 1 are in smooth transition.
The air inlet 12 and the air outlet 13 are disposed opposite to each other right and left on a horizontal axis or up and down on a vertical axis; all of the internally finned heat exchange tubes 23 are parallel to the axis between the inlet 12 and outlet 13 ports. The compressed air enters and exits from the air inlet 12 and the air outlet 13 which are opposite to each other, and the compressed air linearly advances in the cooling mechanism 2, so that no pressure drop is generated, no flow dead zone exists, the air flow is short, and the treatment efficiency is high.
One or more baffles 17 are provided on the inner wall of the cooling cylinder 1 at positions corresponding to the second chamber 112. The baffle plate 17 on the inner wall of the cooling cylinder 1 has a blocking effect on low-temperature water, and the heat exchange efficiency of the low-temperature water is improved.
The inner finned tube 232 is expanded with the outer tube 231. When the inner finned tube 232 is not inserted into the outer tube 231, the outer diameter of the inner finned tube 232 is slightly smaller than the inner diameter of the outer tube 231, so that the inner finned tube 232 can be smoothly inserted into the outer tube 231. During expansion joint, the pipe expander is inserted into the wave crests 232a of the inner finned tubes 232, so that the wave crests 232a of the inner finned tubes 232 are subjected to plastic deformation until the pipe expander is completely attached to the inner wall of the outer tube 231, the inner wall of the outer tube 231 is simultaneously subjected to elastic deformation relative to the positions of the wave crests 232a of the inner finned tubes 232, and then the pipe expander is taken out. Because the wave crest 232a of the inner finned tube 232 is subjected to plastic deformation, the expanded pipe diameter cannot be reduced, the inner wall of the outer tube 231 is still in an elastic deformation state and is subjected to elastic recovery (restoration) to reduce the hole diameter, and a certain squeezing pressure is generated between the outer tube 231 and the inner finned tube 232 and is tightly attached together, so that the purposes of sealing, fastening and connecting are achieved. In addition, when cooling air, the temperature of high-temperature air inside the inner finned tube 232 is high, and the temperature of low-temperature water outside the inner finned tube 232 is low, so that the inner finned tube 232 can be stably and tightly expanded in the outer tube 231 according to the principle of expansion with heat and contraction with cold.
Specifically, the inner finned tube 232 can be an aluminum alloy tube, the aluminum alloy tube is good in heat conducting performance and ductility, the outer tube 231 can be a stainless steel tube, and structural strength is high.
After the inner finned tube 232 is expanded in the outer tube 231, the outer diameter of the inner finned tube 232 is slightly larger than the inner diameter of the outer tube 231, generally 0.1-0.3mm, so that the wave crest 232a of the inner finned tube 232 can tightly stretch and adhere to the inner wall of the outer tube 231. When the difference between the outer diameter of the inner finned tube 232 and the inner diameter of the outer tube 231 is less than 0.1mm, the expansion structure may have a problem of instability, and the inner finned tube 232 may be displaced from the outer tube 231; when the difference between the outer diameter of the inner finned tube 232 and the inner diameter of the outer tube 231 is less than 0.3mm, the crest 232a of the inner finned tube 232 is easily deformed, and the problem that the expansion joint structure fails due to the fact that the crest 232a exceeds the elastic deformation range of the inner wall of the outer tube 231 during expansion joint may occur.
Example 1
The air cooler comprises a cooling cylinder and a cooling mechanism. The cooling cylinder body is provided with a cavity, an air inlet and an air outlet, and the air inlet and the air outlet are communicated with the cavity. A fan is arranged at the air inlet in the cooling cylinder body. The cooling mechanism comprises a first mounting plate, a second mounting plate and one or more inner fin heat exchange tubes, the first mounting plate and the second mounting plate are mounted in the cooling cylinder body at intervals, and cavities between the air inlet and the air outlet are sequentially divided into a first cavity, a second cavity and a third cavity which are independent of each other. And a baffle plate is arranged on the inner wall of the cooling cylinder body at a position corresponding to the second chamber. The position of the cooling cylinder body corresponding to the second cavity is provided with a water inlet and a water outlet, the two ends of all the inner fin heat exchange tubes are respectively arranged on the first mounting plate and the second mounting plate, each inner fin heat exchange tube comprises an outer tube and an inner fin tube embedded in the outer tube, the outer tube is a pipeline with a circular cross section, and the inner fin tube is a pipeline with a corrugated cross section. The inner finned tube comprises wave crests and wave troughs, the wave crests are convex towards the direction of the outer tube and are abutted against the inner wall of the outer tube, and the wave troughs are convex towards the direction inside the inner finned tube. The inner finned tube is internally hollow to form a first fluid channel, a second fluid channel is formed between the inner finned tube and the outer tube, the first fluid channel is communicated with the first cavity and the third cavity, and the second fluid channel is communicated with the second cavity.
Wherein, the quantity of interior fin heat exchange tube is 1035, and 1035 interior fin heat exchange tube is arranged into regular hexagon, and two adjacent interior fin heat exchange tube's centre of a circle apart from d1Diameter d of heat exchange tube with inner fins21.3 times of the total weight of the powder. The material of interior finned tube is the aluminum alloy, and the material of outer tube is stainless steel, and interior finned tube expanded joint is in the outer tube, and the external diameter of interior finned tube is 21.2mm, and the internal diameter of outer tube is 21mm, and crest and trough are arc, and the width d of trough3Is the width d of the wave crest4Twice, the number of wave crests and wave troughs is 16, and the distance d between the wave crests and the wave troughs5Radius r of inner finned tube10.75 times of.
Example 2
This embodiment is different from embodiment 1 in that the number of peaks and valleys is 14.
Example 3
The present embodiment is different from embodiment 1 in that the number of peaks and valleys is 12.
Example 4
This embodiment is different from embodiment 1 in that the number of peaks and valleys is 18.
Example 5
This embodiment is different from embodiment 1 in that the number of peaks and valleys is 20.
TABLE 1 influence of different peak numbers on the heat exchange Effect
Figure BDA0002844727820000081
As can be seen from table 1, when the number of peaks is less than 14, the outlet air temperature is low, but the cooling amount of the compressed air per unit time is also low; when the number of wave crests is more than 18, the cooling amount of the compressed air per unit time is high, but the outlet air temperature is also high; when the number of the wave crests is more than 14 and less than 18, the outlet air temperature is low, and the cooling capacity of the compressed air in unit time can be ensured.
Example 6
The difference between the embodiment and the embodiment 1 is that the center distance d between two adjacent inner fin heat exchange tubes1Diameter d of heat exchange tube with inner fins21.2 times of the total weight of the powder.
Example 7
The difference between the embodiment and the embodiment 1 is that the center distance d between two adjacent inner fin heat exchange tubes1Diameter d of heat exchange tube with inner fins21.4 times of the total weight of the powder.
Example 8
The difference between the embodiment and the embodiment 1 is that the center distance d between two adjacent inner fin heat exchange tubes1Diameter d of heat exchange tube with inner fins21.5 times of the total weight of the powder.
TABLE 2 influence of the spacing of adjacent inner finned heat exchange tubes on the heat exchange effectiveness
Figure BDA0002844727820000091
As can be seen from Table 2, when d1/d2Less than 1.3, relatively more inner fin heat exchange tubes can be arranged in unit space, the cooling capacity of compressed air in unit time is higher, but the heat exchange effect is poor; when d is1/d2More than 1.4, relatively few inner fin heat exchange tubes can be arranged in unit space, the heat exchange effect is good, but the cooling capacity of compressed air in unit time is low; when d is1/d2When the cooling rate is more than 1.3 and less than 1.4, the heat exchange effect is good, and the cooling capacity of the compressed air in unit time can be ensured.
Example 9
The difference between this example and example 1 is that the inner finned tube in this example is made of 30408 stainless steel.
TABLE 3 influence of the material of the inner finned tube on the heat exchange effect
Figure BDA0002844727820000092
As can be seen from the third table, the inner finned tube made of stainless steel and aluminum has little influence on the heat exchange effect. However, aluminum is more ductile and more conducive to expansion between the inner and outer pipes.
Example 10
This embodiment is different from embodiment 1 in that the distance d between the peak and the valley5Radius r of inner finned tube10.6 times of the total weight of the powder.
Example 11
This embodiment is different from embodiment 1 in that the distance d between the peak and the valley5Radius r of inner finned tube10.8 times of the total weight of the powder.
Example 12
This embodiment is different from embodiment 1 in that the distance d between the peak and the valley5Radius r of inner finned tube10.5 times of the total weight of the powder.
Example 13
This embodiment is different from embodiment 1 in that the distance d between the peak and the valley5Radius r of inner finned tube10.9 times of.
TABLE 4 influence of the spacing of the peaks and troughs on the heat exchange effect
Figure BDA0002844727820000101
As can be seen from Table 4, the ratio of the distance between the crest and the trough to the radius of the inner finned tubed5/r1When the temperature is less than 0.6, the heat exchange effect is poor; and the ratio d of the distance between the wave crest and the wave trough to the radius of the inner finned tube5/r1When the heat exchange rate is more than 0.6, the heat exchange effect is better. However, in actual use, the distance between the wave crest and the wave trough is the ratio d of the radius of the inner finned tube5/r1When the number of turns is more than 0.8, the inner fin tube is easily damaged.
The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings can be directly or indirectly applied to other related technical fields and are included in the scope of the present invention.

Claims (10)

1. An air cooler, comprising:
the cooling cylinder is provided with a cavity, an air inlet and an air outlet, and the air inlet and the air outlet are communicated with the cavity;
cooling body, including first mounting panel, second mounting panel and one or more interior fin heat exchange tube, first mounting panel with install in the cooling cylinder with having the interval each other between the second mounting panel, and will the air inlet with between the gas outlet the cavity separates into mutually independent first cavity, second cavity and third cavity in proper order, the position that the cooling cylinder is corresponding to the second cavity is equipped with water inlet and delivery port, and all interior fin heat exchange tube both ends install respectively on the first mounting panel with on the second mounting panel, interior fin heat exchange tube includes the outer tube and inlays and locate interior fin tube in the outer tube, the outer tube is the pipeline that the cross section is circular, interior fin tube is the pipeline that the cross section is the corrugated shape, interior fin tube cavity forms first fluid passageway, and a second fluid channel is formed between the inner finned tube and the outer tube, the first fluid channel is communicated with the first chamber and the third chamber, and the second fluid channel is communicated with the second chamber.
2. The air cooler according to claim 1, wherein said inner finned tube includes crests and valleys, said crests projecting toward said outer tube and abutting against an inner wall of said outer tube, said valleys projecting toward an inside of said inner finned tube;
the wave crests and the wave troughs are arc-shaped or flat-plate-shaped.
3. The air cooler of claim 2, wherein said width d of said valleys3Greater than the width d of the wave crest4；
The number of the wave crests and the wave troughs is equal and is 14-18.
4. An air cooler according to claim 2 or 3, wherein the distance d between said peaks and said valleys5Is the radius r of the inner finned tube10.6-0.8 times of the total weight of the powder.
5. The air cooler according to claim 1, wherein the inner finned heat exchange tubes are plural in number, all the inner finned tubes are parallel to each other, and all the inner finned tubes are formed in a regular polygon shape in cross section.
6. An air cooler according to claim 5, wherein the distance d between the centers of two adjacent inner finned heat exchange tubes1Is the diameter d of the inner fin heat exchange tube21.3 to 1.4 times of the total weight of the composition.
7. The air cooler of claim 1, wherein said water outlet is proximate said air inlet and said water inlet is proximate said air outlet.
8. The air cooler according to claim 1, wherein a fan is provided at the air inlet in the cooling cylinder.
9. The air cooler of claim 1, wherein one or more baffles are provided on the inner wall of the cooling cylinder at a location corresponding to the second chamber.
10. The air cooler of claim 1, wherein the inner finned tube is expanded with the outer tube.
CN202011505290.7A 2020-12-18 2020-12-18 Air cooler Pending CN112484538A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011505290.7A CN112484538A (en) 2020-12-18 2020-12-18 Air cooler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011505290.7A CN112484538A (en) 2020-12-18 2020-12-18 Air cooler

Publications (1)

Publication Number Publication Date
CN112484538A true CN112484538A (en) 2021-03-12

Family

ID=74914704

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011505290.7A Pending CN112484538A (en) 2020-12-18 2020-12-18 Air cooler

Country Status (1)

Country Link
CN (1) CN112484538A (en)

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