CN102735090A - Heat exchange fin for air-conditioning heat exchanger - Google Patents

Abstract

The invention discloses a heat exchanging fin for an air conditioner heat exchanger. The heat exchanging fin is composed of several heat exchanging units, wherein each heat exchanging unit contains a louver structure and a collar located between adjacent louver structures. The above-mentioned collar is used in conjunction with the pipeline for transferring the refrigerant of the air conditioner. A plurality of oblique louvers are arranged on the heat exchange fins of the present invention, and the presence of the louvers can destroy the boundary layer of the air flow on the fins, enhance the turbulence effect of the air flow, and thereby strengthen the heat exchange of the fins. A rectangular gap is arranged in the middle of the louvers near the edge, and the gap does not separate all the windows. In addition to ensuring the mechanical strength of the fins, the invention can effectively improve the heat exchange efficiency of the fins.

Description

A heat exchange fin for an air conditioner heat exchanger

technical field

The invention relates to the technical field of air conditioners in electrical equipment, in particular to a heat exchanging fin for an air conditioner small-diameter tube-fin heat exchanger.

Background technique

In order to save energy and materials, the design of heat exchangers is becoming more and more miniaturized. A better way to realize the miniaturization of the heat exchanger is to use the internally threaded pipe with a smaller diameter to replace the internally threaded pipe with a diameter of 7 mm and above commonly used in existing air conditioners. However, as the outer diameter of the pipe changes from large to small, the flow resistance inside the pipe increases and the contact area decreases, so that the heat transfer performance of the heat exchanger decreases.

In order to improve energy efficiency, measures such as increasing the heat exchange area of the heat exchanger and increasing the air volume are generally adopted, but these measures will greatly increase the manufacturing cost of the air conditioner. In the research of tube-fin heat exchanger, it is found that the heat transfer performance of the heat exchanger mainly depends on the thermal resistance of the heat transfer fins in contact with the air, and the heat transfer resistance of the air side accounts for about 60% of the thermal resistance of the entire heat exchanger. Therefore, it becomes very meaningful to strengthen the heat transfer on the air side and focus on strengthening the heat transfer of the fins around the tubes of the tube-fin heat exchanger.

In the prior art, the heat exchange fins used for pipe diameters of 5mm or even smaller can hardly change the flow direction of the air, and the air usually flows perpendicular to the fins. When the pipe diameter is directly converted from 7mm to 5mm pipe diameter or smaller without re-development and design of the fins used, the heat transfer performance of the heat exchanger often fails to meet the requirements.

Contents of the invention

In order to improve the turbulence effect of air flow, reduce the thermal resistance of the air side, and improve the performance of the heat exchanger, the technical problem to be solved by the present invention is to provide a heat exchange fin for an air conditioner heat exchanger with a small diameter of 5mm.

In order to solve the above technical problems, the technical solution adopted by the present invention is: the heat exchange fins are composed of several heat exchange units, wherein each heat exchange unit contains a louver structure and a collar located between adjacent louver structures, and the collar It is used in conjunction with the pipeline for transferring the refrigerant of the air conditioner. The fin material is aluminum foil, and the thickness T of the aluminum foil is 0.09-0.105mm.

Preferably, the louver structure includes a downturned half louver, an upturned half louver and several full louvers, and the louver structure is symmetrically distributed along the line connecting the center points of the two collars.

Preferably, the downturned half louvers, the upturned half louvers, and the full louvers are left and right symmetrical about the vertical line of the midpoint of the line connecting the center points of two adjacent collars, and there is a certain gap between adjacent windows , forming an air passage, and the width W2 of the gap is 1.0-1.5 mm.

Preferably, a rectangular notch is provided in the middle of the louver near the edge, and the notch cuts the louver into two sections, and the notch does not cut off all the louvers. The gaps are symmetrically distributed up and down along the line connecting the centers of two adjacent collars, and symmetrically distributed left and right along a vertical line midpoint between the center points of two adjacent collars.

Preferably, the included angle R3 between the louvers and the horizontal plane is 22-26°, and the width L relative to the horizontal plane is 1.0-1.5 mm.

Preferably, from the edge of the fin from outside to inside, the length edge of the outer louver and the center line of the collar form a certain angle R2, and R2 is between 45° and 60°; the length of the inner louver extends to the center of the adjacent collar. The center of the circle, the radius R1 is a circular edge of 4-5mm, and the edge connecting the outer fin and the inner fin is a smooth curve.

Preferably, the notch extends y1 = 1-2.6 mm from the edge of the outer half-louver 101 inwardly, and the transverse width of the notch y2 = 1-3 mm.

Preferably, the collar includes a first flared ring, a second flared ring, a stepped annular transition structure and a collar hole; one end of the first flared ring is connected to the sleeve Ring hole, the other end is open. One end of the second trumpet-shaped ring is connected to the collar hole, and the other end is connected to the heat exchange fin through an annular transition structure.

Preferably, the height H2 of the collar hole is 1.2-1.7 mm, the transition radius R4 of the first flared ring is 0.3 mm, the transition radius R5 of the second flared ring is 0.2 mm, and the ring transition radius R4 is 0.3 mm. The inner diameter D2 of the structure is 6.8 mm, and the height H1 is 0.1-0.3 mm.

Preferably, the center-to-center distance Pt between the adjacent collars 200 is 16-19 mm, the collar flange height H is 1.3-2.0 mm, and the inner diameter D1 of the collar hole 202 is 5.2-5.3 mm.

Preferably, the width Pw of the heat exchange fins is 13.6-14.5 mm, and the number of louvers on one side of the collar axial line is 4-8.

Compared with the prior art, the present invention has the following beneficial effects:

1. The present invention arranges louvers on the fins around the tubes, and the horizontal width L of the louvers is 1.0-1.5mm, which can destroy the boundary layer of the airflow on the fins and strengthen the turbulence effect of the airflow, thereby strengthening the heat transfer of the fins .

2. There is a rectangular gap in the middle of the louver near the edge, which cuts the louver into two sections to ensure its mechanical strength.

3. The notch on the edge does not cut off all the louvers, so as to ensure that the notch will not weaken the disturbance to the airflow.

4. The ring transition radius of the second flared ring is reduced to 0.2mm to ensure that the contact area between the ring and the refrigerant transmission pipe increases by 5% to 8% when the height of the ring is constant, thereby increasing the The heat exchange area is increased, and the heat exchange performance of the heat exchanger is improved.

Description of drawings

Fig. 1 is a plan view of the structure of the heat transfer fins of the heat transfer fins used in the air conditioner heat exchanger of the present invention;

Fig. 2 is the structural distribution diagram of the louver structural unit of the heat exchange fin of the air conditioner heat exchanger of the present invention;

Fig. 3 is a composition diagram of the collar 200 of the heat exchange fin used in the air conditioner heat exchanger of the present invention;

Fig. 4 is A-A left view of Fig. 1;

Fig. 5 is a structural schematic diagram of multiple rows of heat exchanging fins for the heat exchanging fins used in the air conditioner heat exchanger of the present invention.

Detailed ways

The present invention will be further described in detail below in conjunction with the embodiments and accompanying drawings, but the embodiments of the invention are not limited thereto.

As shown in Figures 1, 2, 3 and 4, it is a new type of heat exchange fin for air conditioner heat exchanger. The heat exchange fin includes several heat exchange units, wherein each heat exchange unit contains a louver structure 100 and is located at the adjacent louver. The collar 200 between the structures, the collar 200 is used in conjunction with the pipeline for conveying the refrigerant of the air conditioner.

The louver structure 100 includes a downturned half louver 101 , an upturned half louver 103 and several full louvers 102 , and the louver structure 100 is symmetrically distributed along the line connecting the center points of the two collars 200 . The width Pw of the heat exchange fins is 13.6-14.5 mm, the material of the fins is aluminum foil, and the thickness T of the aluminum foil is 0.09-0.105 mm. In this embodiment, Pw=14.5mm, T=0.1mm.

Turn down the half louver 101, turn up the half louver 103, and the full louver 102 is symmetrical to the vertical line of the middle point of the line connecting the center points of two adjacent collars, and there is a certain gap between the adjacent windows, forming In the air channel 300, the width W2 of the gap is 1.0-1.5 mm. In this embodiment, W2=1.3mm.

A rectangular gap 3 is provided in the middle of the louvers 101 and 102 near the edges, and the notch cuts the slats into two sections, and the notch does not cut off all the slats.

The gaps 3 are symmetrically distributed up and down along the line connecting the centers of two adjacent collars 200 , and symmetrically distributed left and right along the vertical line between the center points of the two adjacent collars.

The included angle R3 between the louvers 101, 102 and 103 and the horizontal plane is 22-26°, and the projected width L relative to the horizontal plane is 1.0-1.5 mm. In this embodiment, R3=25°, L=1.3mm.

From the edge of the fins from the outside to the inside, the length edge of the outer louver and the center line of the collar form a certain angle R2=45~60°; the length of the inner louver extends to the center of the adjacent collar, and the radius R1 is 4~ 5mm round edge, and the edge connecting the outer fin and the inner fin is a smooth curve. In this embodiment, R2=60°, R1=4.5mm.

The notch 3 extends inwardly from the edge of the outer half louver 101 by y1 = 1-2.6 mm, and the transverse width of the notch y2 = 1-3 mm. In this embodiment, y1=2.6mm, and y2=1.5mm.

The collar 200 includes a first flared ring 201, a second flared ring 203, a stepped annular transition structure 204 and a collar hole 202; one end of the first flared ring 201 is connected to the The collar hole 202 is open at the other end. One end of the second trumpet-shaped ring 203 is connected to the collar hole 202 , and the other end is connected to the heat exchange fin through the annular transition structure 204 .

The height H2 of the collar hole 202 is 1.2-1.7mm, the transition radius R4 of the first flared ring 201 is 0.3mm, the ring transition radius R5 of the second flared ring 203 is 0.2mm, and the ring transition structure The inner diameter D2 is 6.8 mm, and the height H1 is 0.1 to 0.3 mm. In this embodiment, H2=1.3mm, H1=0.2mm.

The center-to-center distance Pt between adjacent collars 200 is 16-19 mm, the collar flange height H is 1.3-2.0 mm, and the inner diameter D1 of the collar hole 202 is 5.2-5.3 mm. In this embodiment, H=1.7mm, Pt=17.4mm, and D1=5.2mm.

The number of louvers on one side of the axial line of the collar 200 is 4-8. Preferably, the number of windows in this embodiment is 5.

Example 2

This embodiment is the same as Embodiment 1 except for the following features: As shown in Figure 5, the heat exchange fins in Embodiment 1 are expanded to form double rows, three rows or more The row of heat exchange fins can also be combined with heat exchange fins of other structural forms to form a combined heat exchange fin.

The above embodiments are only preferred embodiments of the present invention, and are not intended to limit the implementation scope of the present invention. That is, all equivalent changes and modifications made according to the content of the present invention are covered by the protection scope of the claims of the present invention.

Claims (15)

1. A heat exchange fin for an air-conditioning heat exchanger, characterized in that, the heat exchange fin is composed of several heat exchange units, wherein each of the heat exchange units contains a louver structure (100) and an adjacent louver structure The collar (200) between the collars (200) is used in cooperation with the pipeline for transferring the refrigerant of the air conditioner. 2. The heat exchanging fin for air conditioner heat exchanger according to claim 1, characterized in that: the louver structure (100) includes a downturned half louver (101), an upturned half louver (103) and several The whole louver (102), and the louver structure (100) is symmetrically distributed along the line connecting the center points of the two collars (200). 3. The heat exchange fin for air conditioner heat exchanger according to claim 1 or 2, characterized in that: the material of the fin is aluminum foil, and the thickness (T) of the aluminum foil is 0.09-0.105mm. 4. The heat exchanging fin for an air conditioner heat exchanger according to claim 2, characterized in that: the downturned half louvers (101), the upturned half louvers (103), and the full louvers (102) are The vertical line of the middle point of the connecting line adjacent to the center points of the two collars is symmetrical left and right, and there is a certain gap between adjacent louver pieces to form an air channel (300), and the width (W2) of the gap is 1.0-1.5 mm. 5. The heat exchanging fin for air conditioner heat exchanger according to claim 4, characterized in that: a rectangular gap (3) is provided in the middle of the louvers (101, 102) near the edge, and the notch cuts the louvers into two sections , and the gap does not cut off all the louvers. 6. The heat exchange fin for an air conditioner heat exchanger according to claim 5, characterized in that: the gaps (3) are symmetrically distributed up and down along the line connecting the centers of two adjacent collars (200), and The vertical line of the middle point of the line adjacent to the center points of the two loops is symmetrically distributed. 7. The heat exchange fins for air conditioner heat exchanger according to claim 2 or 4, characterized in that: the included angle (R3) between the louvers (101, 102, 103) and the horizontal plane is 22-26°, relatively The width (L) of the horizontal plane is 1.0 to 1.5 mm. 8. The heat exchange fin for air conditioner heat exchanger according to any one of claims 2, 4, 5 or 7, characterized in that: from the edge of the fin to the inside, the length edge of the outer louver is connected to the center of the collar The line forms a certain angle (R2), and the angle (R2) is 45~60°; the length of the inner louver extends to the circle edge with the center of the adjacent ring as the center, and the radius (R1) is 4~5mm, and the outer wing The line connecting the edge of the sheet and the inner fin is a smooth curve. 9. The heat exchange fin for air conditioner heat exchanger according to claim 5 or 6, characterized in that: the gap (3) extends inward from the edge of the outer half louver (101) (y1) = 1-2.6mm , and the transverse width (y2) of the notch=1-3mm. 10. The heat exchange fin for an air conditioner heat exchanger according to claim 1, characterized in that: the collar (200) comprises a first bell-shaped ring (201), a second bell-shaped ring (203) ), a stepped annular transition structure (204) and a collar hole (202); one end of the first trumpet-shaped ring (201) is connected to the collar hole (202), and the other end is an opening; the One end of the second trumpet-shaped ring (203) is connected to the collar hole (202), and the other end is connected to the heat exchange fin through an annular transition structure (204). 11. The heat exchanging fin for an air conditioner heat exchanger according to claim 10, characterized in that: the height (H2) of the collar hole (202) is 1.2-1.7mm, and the first trumpet-shaped ring (201 ) transition radius (R4) is 0.3mm, the circular ring transition radius (R5) of the second flared ring (203) is 0.2mm, the inner diameter (D2) of the annular transition structure is 6.8mm, and the height (H1) is 0.1 ~0.3mm. 12. The heat exchange fin for air conditioner heat exchanger according to any one of claims 1, 10 or 11, characterized in that: the center-to-center distance (Pt) between the adjacent collars (200) is 16-19mm , the collar flanging height (H) is 1.3-2.0 mm, and the inner diameter (D1) of the collar hole (202) is 5.2-5.3 mm. 13. The heat exchange fin for an air conditioner heat exchanger according to any one of claims 1-12, characterized in that the number of louvers on one side of the axial line of the collar (200) is 4-8. 14. The heat exchange fin for an air conditioner heat exchanger according to any one of claims 1-13, characterized in that the width (Pw) of the heat exchange fin is 13.6-14.5 mm. 15. A combined heat exchange fin, comprising several heat exchange fins according to any one of claims 1-14.

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