CN108692589B - Cross dendritic reinforced heat exchange fin heat exchanger - Google Patents
Cross dendritic reinforced heat exchange fin heat exchanger Download PDFInfo
- Publication number
- CN108692589B CN108692589B CN201810387287.6A CN201810387287A CN108692589B CN 108692589 B CN108692589 B CN 108692589B CN 201810387287 A CN201810387287 A CN 201810387287A CN 108692589 B CN108692589 B CN 108692589B
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- China
- Prior art keywords
- heat exchange
- deflection
- fins
- branch
- fin
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- Expired - Fee Related
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- 230000030279 gene silencing Effects 0.000 claims description 9
- 230000009467 reduction Effects 0.000 claims description 5
- 238000003491 array Methods 0.000 claims description 2
- 239000012530 fluid Substances 0.000 description 14
- 230000000694 effects Effects 0.000 description 5
- 230000007547 defect Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000001743 silencing effect Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
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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
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- 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
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside 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
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/22—Arrangements for directing heat-exchange media into successive compartments, e.g. arrangements of guide plates
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Geometry (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a cross dendritic reinforced heat exchange fin heat exchanger, which comprises a plurality of heat exchange fins arranged in parallel, wherein each heat exchange fin is divided into a plurality of sections, from the second section of the heat exchange fin, the windward end of each section is provided with a deflection branch deflected to one side of the heat exchange fin, and the deflection directions of the deflection branches on two adjacent sections are opposite; the structure of each heat exchange fin is the same, and the top end of the deflection branch is positioned at the central line position of two adjacent heat exchange fins.
Description
Technical Field
The invention belongs to the field of air conditioning equipment, and particularly relates to a cross dendritic reinforced heat exchange fin heat exchanger.
Background
The finned tube heat exchanger is an important part in an air conditioning system, and the good heat exchange and pressure drop characteristics of the finned tube heat exchanger are very important for maintaining the quality of the system. The existing fins meet the heat exchange requirement of air and wall surfaces only by reducing the fin spacing and increasing the number of the fins, and the structure is heavy.
Aiming at the defects of the straight plate type fins, the invention provides a branch type perforated fin heat exchanger which is formed by perforating a plurality of crossed fins according to a certain rule. The heat exchanger can quickly transfer air in a central area (farthest from a heat exchange surface) of a flow field to the heat exchange surface, increase the heat exchange temperature difference, improve the heat exchange strength, improve the thermal comfort and reduce the size of equipment. Meanwhile, the fins are provided with holes to form silencing cavities, so that the fan and airflow noise of the heat exchanger can be reduced to a certain extent, and the double effects of heat exchange enhancement and noise reduction are achieved.
The effect of the convection heat transfer of the fins of the air supply device is the most important index for evaluating the quality of the fins, and the fins on the market are mostly straight plates at present, so that the defects of large occupied space and poor heat exchange effect exist. The occupied space is large, so that the equipment cost is increased, the material is wasted, and meanwhile, the indoor environment is not beautiful enough; poor heat exchange results in insufficient thermal comfort and energy waste for the human body.
The most widely used on the market at present is a straight plate type fin. However, the straight plate type fin has the following disadvantages:
(1) the existing fins meet the heat exchange requirement of air and a wall surface only by reducing the fin spacing and increasing the number of the fins, and the fins are heavy in structure, large in metal material consumption and high in cost.
(2) The fin heat exchange only considers the heat exchange requirement, and the requirements for noise elimination and noise reduction are not considered enough, so that the fin heat exchanger is high in noise and not good in comfort.
Aiming at the defects of straight plate type fins, the invention provides a cross dendritic reinforced heat exchange and silencing fin heat exchanger, which has the noise reduction function while remarkably improving the convection heat exchange performance of the fins and reducing the equipment manufacturing cost.
Disclosure of Invention
In order to solve the problems, the invention provides a cross dendritic reinforced heat exchange fin heat exchanger.
The invention is realized by the following technical scheme:
a cross-branch-shaped heat exchange fin heat exchanger with strengthened heat exchange fins comprises a plurality of heat exchange fins which are arranged in parallel, wherein the heat exchange fins are divided into a plurality of sections, from the second section of the heat exchange fins, the windward end of each section is provided with a deflection branch which deflects towards one side of each heat exchange fin, and the deflection directions of the deflection branches on two adjacent sections are opposite; the structure of each heat exchange fin is the same, and the top end of the deflection branch is positioned at the central line position of two adjacent heat exchange fins;
in a further improvement, the horizontal parts of the heat exchange fins are provided with silencing small hole arrays, and the small holes of two adjacent heat exchange fins are arranged in a staggered manner.
In a further improvement, the diameter of the small holes of the sound attenuation small hole array is 0.01 cm-0.05 cm, and the distance between the small holes is 1.0 cm-2.0 cm.
The further improvement is that the distance d between two adjacent heat exchange fins is 0.5-1.0 cm, the deflection angle theta of the deflection branch towards one side is 40-50 degrees, and the length h of the deflection section is d/(2sin theta).
Compared with the prior art, the invention has the following advantages:
1) the key point of the invention is that the exchange of the central layer air flow and the boundary layer air flow is realized through the cross deflection design of the fins, thereby maximizing the temperature difference and strengthening the heat exchange. The convection heat exchange quantity is in direct proportion to the temperature difference (the temperature difference between the fluid and the wall surface), and the heat exchange quantity can be increased by increasing the temperature difference, so that the heat exchange strength is improved. Generally, in the process of flow heat exchange, because the distance is small, the temperature of the fluid near the wall surface (boundary layer) is relatively close to the temperature of the wall surface, and the temperature of the fluid in the central area is relatively far away from the wall surface, and the difference between the temperature of the fluid in the central area and the temperature of the wall surface is relatively large, therefore, the exchange of the fluid in the central area and the fluid in the boundary layer is an important means for improving the heat convection effect. The cross branch fin structure provided by the invention is designed based on the principle. The fluid flows along the S-shaped track, the central layer airflow and the boundary layer airflow are repeatedly exchanged, the effect similar to poker card shuffling is realized, the heat exchange temperature difference between the fluid and the wall surface is increased, and the heat exchange strength is improved.
2) For the fin heat exchanger, the noise of a fan and air flow (the speed is less than 10m/s and is relatively low) is mainly low and medium frequency, and the noise of the low and medium frequency can be effectively eliminated by the silencing cavity. The invention provides that the small holes of the upper and lower adjacent fins are arranged in a staggered manner to form a silencing cavity. The non-deflection parts of the fins are provided with small holes, the upper and lower fins are heat exchange wall surfaces and are silencing cavities for flowing noise and fan noise, and the noise reduction and silencing effect is good.
Drawings
FIG. 1 is a schematic air flow diagram of example 1;
FIG. 2 is a schematic view of a small hole in example 1.
Detailed Description
In order to make the technical solutions of the present invention better understood and make the above features, objects, and advantages of the present invention comprehensible, the present invention is further explained with reference to examples, and it should be noted that all examples listed herein are only illustrative and are not meant to limit the scope of the present invention.
Example 1:
as shown in fig. 1, the cross-branch-shaped enhanced heat exchange fin heat exchanger includes a plurality of heat exchange fins arranged in parallel, each heat exchange fin is divided into a plurality of sections along the airflow flowing direction, and from the second section, the windward end of each section is deflected to the side face by a certain angle to form a deflection branch. The windward end of the latter section deflects to the other side for a certain angle, and the deflected branches of the front and rear sections of fins form a cross structure, and the specific structure is shown in fig. 1.
On the horizontal surface of each section of fin, an array of small holes is opened, and the specific structure is shown in fig. 2. In order to form a silencing cavity structure, the small holes of every two adjacent fins are arranged in a staggered mode, namely the small hole of the first fin is arranged on a node of the grid, and the small hole of the adjacent fin is arranged in the center of the grid.
As can be seen from the flow path of the airflow, the airflow flows forwards along the S shape under the rectification action of the cross deflection branches along the horizontal flow direction. The exchange positions of fluid in the central area of the flow field (the central positions of two adjacent fins) and fluid near the wall surfaces of the fins on each section of fins are that when the fluid in the central area of the second section of fins flows to the area of the third section of fins, the fluid is close to the wall surfaces of the third section of fins, and the fluid near the wall surfaces of the second section of fins is extruded to the central area in the area of the third section of fins, and the process is repeated until the fluid flows out of the fin heat exchanger.
The distance d between the heat exchange fins is 0.5-1.0 cm, the deflection angle theta is 40-50 degrees, the length h of the deflection section is d/(2sin theta), and the end points of the deflection fins are ensured to be positioned on the central line. The diameter of the small holes is 0.01 cm-0.05 cm, and the distance between the small holes is 1.0 cm-2.0 cm, so that a silencing cavity is formed.
Claims (2)
1. A cross-branch-shaped heat exchange fin heat exchanger is characterized in that the heat exchange fins are divided into a plurality of sections, from the second section of the heat exchange fins, the windward end of each section is provided with a deflection branch deflected to one side of the heat exchange fins, and the deflection directions of the deflection branches on the two adjacent sections are opposite; the structure of each heat exchange fin is the same, and the top end of the deflection branch is positioned at the central line position of two adjacent heat exchange fins;
the horizontal parts of the heat exchange fins are provided with small silencing hole arrays, and the small holes of two adjacent heat exchange fins are arranged in a staggered manner; the diameter of the small holes of the noise reduction small hole array is 0.01 cm-0.05 cm, and the distance between the small holes is 1.0 cm-2.0 cm.
2. The cross-branch-shaped reinforced heat exchange fin heat exchanger as claimed in claim 1, wherein the distance d between two adjacent heat exchange fins is 0.5-1.0 cm, the deflection angle theta of the deflection branch to one side is 40-50 degrees, and the length h of the deflection section is d/(2sin theta).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810387287.6A CN108692589B (en) | 2018-04-26 | 2018-04-26 | Cross dendritic reinforced heat exchange fin heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810387287.6A CN108692589B (en) | 2018-04-26 | 2018-04-26 | Cross dendritic reinforced heat exchange fin heat exchanger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108692589A CN108692589A (en) | 2018-10-23 |
| CN108692589B true CN108692589B (en) | 2020-05-19 |
Family
ID=63845791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810387287.6A Expired - Fee Related CN108692589B (en) | 2018-04-26 | 2018-04-26 | Cross dendritic reinforced heat exchange fin heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108692589B (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09159313A (en) * | 1995-12-08 | 1997-06-20 | Fujitsu General Ltd | Heat exchanger |
| JP4876660B2 (en) * | 2006-03-24 | 2012-02-15 | パナソニック株式会社 | Finned heat exchanger and air conditioner |
| CN203980991U (en) * | 2014-07-28 | 2014-12-03 | 北京市燃气集团有限责任公司 | A kind of plate-fin heat exchanger punching corrugated fin structure |
| CN104807362A (en) * | 2015-04-22 | 2015-07-29 | 哈尔滨工程大学 | Efficient plate fin type heat radiator fin |
| CN106052462B (en) * | 2016-06-24 | 2018-04-20 | 西安科技大学 | A kind of mine air cooler corrugated fin heat exchange structure and its design method |
| CN206291341U (en) * | 2016-12-09 | 2017-06-30 | 美的集团武汉制冷设备有限公司 | Heat exchanger for air-conditioner indoor machine and indoor apparatus of air conditioner |
| CN206572736U (en) * | 2017-02-10 | 2017-10-20 | 珠海格力电器股份有限公司 | Fin-tube heat exchanger and the air conditioner with it |
-
2018
- 2018-04-26 CN CN201810387287.6A patent/CN108692589B/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN108692589A (en) | 2018-10-23 |
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Granted publication date: 20200519 |