CN205279842U

CN205279842U - Novel shutter finned heat exchanger

Info

Publication number: CN205279842U
Application number: CN201521119871.1U
Authority: CN
Inventors: 周俊杰; 牛玲; 绳冉冉
Original assignee: Zhengzhou University
Current assignee: Zhengzhou University
Priority date: 2015-12-30
Filing date: 2015-12-30
Publication date: 2016-06-01
Anticipated expiration: 2025-12-30

Abstract

The utility model is suitable for a heat exchanger field provides a novel shutter finned heat exchanger, and this shutter finned heat exchanger is including slope substrate, shutter wing, transition substrate and porous flat pipe, the shutter wing divides into groups to install on the slope substrate, connect through the transition substrate between every two sets of shutter wing, every two sets of slope substrate is " the positive eight characters " and installs between upper and lower two porous flat pipes. The utility model discloses in get into the fin when regional along the slope substrate when the air, the shutter wing has changed the flow direction of air, the concurrent interruption thermal boundary layer of air on the slope substrate continuation form because the shutter wing has the vortex effect, the thickness of thermal boundary layer on the shutter wing significantly reduces to reach enhanced heat transfer's effect, and because the existence of slope substrate, when increasing the vortex, greatly reduced the pressure drop of air side to the resistance loss that has reduced the air side when improving the heat transfer effect has been reached.

Description

A kind of Novel shutter fin heat exchanger

Technical field

This utility model belongs to field of heat exchangers, particularly relates to a kind of Novel shutter fin heat exchanger.

Background technology

Fin-type heat exchanger of louver widely uses in air conditioning for automobiles as the new topic of compact heat exchanger. The form of compact heat exchanger generally has fin-tube type, plate-fin and corrugated tube type. The heat exchanger that flat tube and corrugated tube type fin combine, has good augmentation of heat transfer effect, and its thermal resistance is primarily present in air side, thus the effective ways improving its heat exchange efficiency are the thermal resistances reducing air side. In succession developing for these various high-efficiency fins, wherein the effect of louvered fin is wherein one of best.

Existing fin-type heat exchanger of louver patent is usually on the basis of flat substrate, offers several groups of fins with certain louver angle. Air flows in fin, changes the flow direction of air on the one hand, interrupts the growth of thermal boundary layer on the other hand, thus realizing the purpose of augmentation of heat transfer. But these patented technologies are in whole air velocity, substrate major part is all the flat substrate vertical with flat tube, and these with the flat substrate of louvered fin while augmentation of heat transfer, its air drag also sharply increases.

Owing to people are more and more higher to the requirement of environmental quality, and automobile industry is one of ten big power consumption industries, and therefore current heat exchanger for vehicle proposes requirement compact, efficient. Require on the one hand to reduce air-side blockage, increase heat transfer property; On the other hand, meet again and reduce cost, reduce the requirement of volume. The heat exchanger that exploitation is highly efficient is needed for this.

Utility model content

The purpose of this utility model is in that to provide a kind of Novel shutter fin heat exchanger, it is intended to solve the existing problem that louvered fin heat exchange efficiency is low, air-side blockage is big.

This utility model is achieved in that a kind of Novel shutter fin heat exchanger, and this fin-type heat exchanger of louver includes: tilt substrate, shutter wing, transition substrate, porous flat pipe; The packet of described shutter wing is arranged on inclination substrate; Connected by transition substrate between every two groups of shutter wings; Every two groups of inclination substrates are arranged between upper and lower two porous flat pipes in " positive eight words "; Often group inclination substrate is identical with the angle of porous flat pipe; Described shutter wing is in a certain angle with inclination substrate, and the cross section parallelogram of shutter wing; Louvered fin includes portion and leeward portion windward; The shutter wing in described portion windward is identical with the angle tilting substrate with the shutter wing in the angle tilting substrate and leeward portion, windows in opposite direction.

The two ends, side of described shutter wing coordinate fixing connection with tilting substrate, are inclined by substrate and are divided into upper and lower two parts; The part of the shutter wing being positioned at described inclination substrate upper surface is upper part, and the part of the shutter wing being positioned at described inclination substrate lower surface is lower part; Described upper part shutter wing and lower part shutter wing are symmetrical arranged with the centrage of the cross section of shutter wing.

Being positioned at described inclination substrate the starting position of shutter wing is set and end position place only arranges lower part shutter wing.

In the position being positioned at described transition substrate and arranging shutter wing, part shutter wing is only set.

Described shutter wing and the angle tilting substrate are set to 26 �� ~ 30 ��.

Often organize described louvered fin to be made up of 5 ~ 8 shutter wings.

The level interval of two adjacent described shutter wings is 1.2 ~ 1.5mm.

The angle of each described inclination substrate and flat tube is 72 �� ~ 77 ��.

Compared with prior art, design described in the utility model is adopted, it is possible to reach techniques below effect:

When air is along when tilting substrate entrance fin area in this utility model, shutter wing changes the flow direction of air, interrupted air continuously forming at the thermal boundary layer tilted on substrate simultaneously, owing to shutter wing has flow-disturbing effect, greatly reduce thermal boundary layer thickness on shutter wing, in order to reach the effect of augmentation of heat transfer; And owing to tilting the existence of substrate, while increasing flow-disturbing, greatly reduce the pressure drop of air side, thus while having reached to improve heat transfer effect, reduce the drag losses of air side.

Accompanying drawing explanation

Fig. 1 is the structural upright schematic diagram of the Novel shutter fin heat exchanger that this utility model provides;

Fig. 2 is the left view of the Novel shutter fin heat exchanger that this utility model provides;

Fig. 3 is the schematic diagram of the Novel shutter fin that this utility model provides;

Fig. 4 is the structural representation of the single louvered fin of the Novel shutter fin that this utility model provides;

Fig. 5 is the Novel shutter fin heat exchanger heat transfer property comparison diagram with common louvered fin heat exchanger of this utility model offer;

Fig. 6 be the Novel shutter fin heat exchanger and the common louvered fin heat exchanger that provide of this utility model resistance performance comparison diagram;

In figure: 1, tilt substrate; 2, shutter wing; 3, transition substrate; 4, porous flat pipe.

Detailed description of the invention

In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, this utility model is further elaborated. Should be appreciated that specific embodiment described herein is only in order to explain this utility model, be not used to limit this utility model.

Fig. 1 illustrates the structural representation of the Novel shutter fin heat exchanger that this utility model embodiment provides. For the ease of illustrating, illustrate only the part relevant to this utility model embodiment.

A kind of Novel shutter fin heat exchanger, this fin-type heat exchanger of louver includes: tilt substrate 1, shutter wing 2, transition substrate 3, porous flat pipe 4; The packet of described shutter wing is arranged on inclination substrate 1; Connected by transition substrate 3 between every two groups of shutter wings 2; Every two groups of inclination substrates 1 are arranged between upper and lower two porous flat pipes 4 in " positive eight words "; It is identical with the angle of porous flat pipe 4 that described often group tilts substrate 1; Described shutter wing 2 is in a certain angle with inclination substrate 1, and the cross section parallelogram of shutter wing 2; Shutter wing 2 includes portion and leeward portion windward; The shutter wing 2 in described portion windward is identical with the angle tilting substrate 1 with the shutter wing 2 in the angle tilting substrate 1 and leeward portion, windows in opposite direction. The two ends, side of described shutter wing 2 coordinate fixing connection with tilting substrate 1, are inclined by substrate 1 and are divided into upper and lower two parts; The part of the shutter wing 2 being positioned at described inclination substrate 1 upper surface is upper part, and the part of the shutter wing 2 being positioned at described inclination substrate 1 lower surface is lower part; Described upper part shutter wing 2 is symmetrical arranged with the centrage of the cross section of shutter wing 2 with lower part shutter wing 2. Being positioned at described inclination substrate 1 starting position of shutter wing 2 is set and end position place only arranges lower part shutter wing 2. In the position being positioned at described transition substrate 3 and arranging shutter wing 2, part shutter wing 2 is only set. The side at the two ends of described shutter wing 2 forms open space with tilting substrate 1 so that heat exchange efficiency is higher.

As this utility model embodiment one preferred version, shutter wing 2 and the angle tilting substrate 1 may be configured as optimal angle 26o ~ 30o as shown in Figure 4.

As this utility model embodiment one preferred version, often group louvered fin is made up of 5 ~ 8 shutter wings 2.

As this utility model embodiment one preferred version, the spacing of two neighboring louver wings 2 may be designed as 1.2 ~ 1.5mm.

As this utility model embodiment one preferred version, the angle of each described inclination substrate 1 and porous flat pipe 4 is 72 �� ~ 77 ��.

Below in conjunction with drawings and the specific embodiments, application principle of the present utility model is further described.

As shown in Figure 1, this utility model designs according to field coordination principle, when air enters fin area along inclination substrate 1, shutter wing 2 changes the flow direction of air, has interrupted air continuously forming at the thermal boundary layer tilted on substrate 1, owing to shutter wing 2 has flow-disturbing effect simultaneously, greatly reduce boundary region thickness on shutter wing 2, to reach the effect of augmentation of heat transfer, simultaneously because tilt the existence of substrate, while ensureing heat transfer effect, substantially reduce the pressure drop of air side.

In this utility model embodiment, fin used, often group has 5 ~ 8 shutter wings 2 to form. The spacing of two neighboring louver wings 2 is set to 1.2 ~ 1.5mm. Commutate between every two groups of shutter wings 2 position inclination substrate 1. Often the length between group shutter wing 2 is 1.8 ~ 3mm. The height of shutter wing 2 is designed as 0.7 ~ 1.5mm. Shutter wing 2 and the angle tilting substrate are designed as 26o ~ 30o.

Adopt numerical simulation technology, respectively the present embodiment and plain fin heat exchanger have been carried out the calculating of heat transfer and resistance, it is concluded that Fig. 5 is the present embodiment and the heat transfer property comparison diagram of common louvered fin heat exchanger, as seen from the figure, under different wind speed, relative to common louvered fin heat exchanger, the heat transfer property of the present embodiment improves 10% ~ 30%.

Fig. 6 is the present embodiment and the resistance performance comparison diagram of common louvered fin heat exchanger, figure draw, under different wind speed, relative to common louvered fin heat exchanger, the resistance of the present embodiment reduces 11.1% ~ 42.3%.

By above-mentioned analysis it can be seen that relative to existing common louvered fin heat exchanger, this fin-type heat exchanger of louver, while ensureing to improve heat transfer efficiency, greatly reduces the drag losses of air side, more energy-conservation, therefore can reduce cost.

The foregoing is only preferred embodiment of the present utility model; not in order to limit this utility model; all any amendment, equivalent replacement and improvement etc. made within spirit of the present utility model and principle, should be included within protection domain of the present utility model.

Claims

1. a Novel shutter fin heat exchanger, it is characterised in that this fin-type heat exchanger of louver includes: tilt substrate, shutter wing, transition substrate, porous flat pipe; The packet of described shutter wing is arranged on inclination substrate; Connected by transition substrate between every two groups of shutter wings; Every two groups of inclination substrates are arranged between upper and lower two porous flat pipes in " positive eight words "; Often group inclination substrate is identical with the angle of porous flat pipe; Described shutter wing is in a certain angle with inclination substrate, and the cross section parallelogram of shutter wing; Louvered fin includes portion and leeward portion windward; The shutter wing in described portion windward is identical with the angle tilting substrate with the shutter wing in the angle tilting substrate and leeward portion, windows in opposite direction.

2. fin-type heat exchanger of louver as claimed in claim 1, it is characterised in that: the two ends, side of described shutter wing coordinate fixing connection with tilting substrate, are inclined by substrate and are divided into upper and lower two parts; The part of the shutter wing being positioned at described inclination substrate upper surface is upper part, and the part of the shutter wing being positioned at described inclination substrate lower surface is lower part; Described upper part shutter wing and lower part shutter wing are symmetrical arranged with the centrage of the cross section of shutter wing.

3. fin-type heat exchanger of louver as claimed in claim 1, it is characterised in that: being positioned at described inclination substrate the starting position of shutter wing is set and end position place only arranges lower part shutter wing.

4. fin-type heat exchanger of louver as claimed in claim 2, it is characterised in that: in the position being positioned at described transition substrate and arranging shutter wing, part shutter wing is only set.

5. fin-type heat exchanger of louver as claimed in claim 1, it is characterised in that: described shutter wing and the angle tilting substrate may be configured as optimal angle 26o ~ 30o.

6. fin-type heat exchanger of louver as claimed in claim 1, it is characterised in that: often organizing described louvered fin has 5 ~ 7 described shutter wing compositions.

7. fin-type heat exchanger of louver as claimed in claim 1, it is characterised in that: the level interval of two adjacent described shutter wings is 1.2 ~ 1.5mm.

8. fin-type heat exchanger of louver as claimed in claim 1, it is characterised in that: the angle of each described inclination substrate and porous flat pipe is 72 �� ~ 77 ��.