CN218723446U

CN218723446U - Fin structure and heat exchanger thereof

Info

Publication number: CN218723446U
Application number: CN202222312278.5U
Authority: CN
Inventors: 王冠军
Original assignee: Zhejiang Dunan Thermal Technology Co Ltd
Current assignee: Zhejiang Dunan Thermal Technology Co Ltd
Priority date: 2022-08-30
Filing date: 2022-08-30
Publication date: 2023-03-24
Anticipated expiration: 2032-08-30
Also published as: WO2024046273A1

Abstract

The utility model relates to a heat exchanger field especially relates to fin structure and heat exchanger thereof. A fin structure is applied to a micro-channel heat exchanger, and is provided with a flat tube groove, a flat tube penetrates through the flat tube groove, and the flat tube is used for medium flowing so as to be matched with the fin structure to absorb or release heat of air; the fin structure includes a plurality of slope sections, and is a plurality of the slope section all follows the one end of fin structure extends to the other end, and is a plurality of the slope section is end to end connection in proper order, constitutes the wave form, the both sides dorsad of slope section all have the inclined plane. The heat exchanger has the advantages that the flow path of air on the surface of the fin structure is lengthened, the contact time of the air and the surface of the fin structure is prolonged, the contact area of the air and the fin structure is increased, the retention time of the air on the surface of the fin structure is prolonged, and the heat exchange efficiency is improved; in addition, because the inclined section extends from one end of the fin structure to the other end, drainage can be smoother, and moisture is prevented from staying or even condensing on the fins.

Description

Fin structure and heat exchanger thereof

Technical Field

The utility model relates to a heat exchanger field especially relates to fin structure and heat exchanger thereof.

Background

Heat exchangers are generally used in refrigeration systems to absorb or release heat from air by a medium flowing therethrough, thereby performing a cooling or heating function.

Current finned heat exchanger includes heat exchange tube and fin usually, and the fin is pegged graft with the heat exchange tube and is cooperated for the area of contact of increase heat exchanger and air promotes heat exchange efficiency, but ordinary fin structure heat exchange efficiency is not high, and when moisture in the air stayed on the fin, the drainage effect of fin was also not good enough.

SUMMERY OF THE UTILITY MODEL

Based on this, the utility model discloses to above-mentioned technical problem, provide a fin structure, technical scheme is as follows:

a fin structure is applied to a micro-channel heat exchanger and is provided with a flat tube slot, the flat tube slot penetrates through one side of the fin structure to form an opening, a flat tube penetrates through the flat tube slot, and a medium flows through the flat tube so as to absorb or release heat of air by matching with the fin structure;

the fin structure includes a plurality of slope sections, and is a plurality of the slope section all follows the one end of fin structure extends to the other end, and is a plurality of the slope section connects gradually in order to form wavy shape, the both sides face of slope section dorsad be for the inclined plane that open-ended orientation slope set up.

Due to the arrangement, the air can flow through the wavy fin structure, so that the flow path of the air on the surface of the fin structure is lengthened under the condition that the total width is unchanged, the contact time of the air and the surface of the fin structure is prolonged, and the contact area of the air and the fin structure is increased, so that the heat exchange efficiency is improved; in addition, because the inclined section extends from one end of the fin structure to the other end, drainage can be smoother, and moisture is prevented from staying or even condensing on the fins.

In one embodiment, the inclined surfaces are angled from 5 ° to 20 ° from the orientation of the opening.

By the arrangement, the inclination of the inclined plane can be in a reasonable value, and if the inclination angle is smaller than 5 degrees, the heat exchange efficiency of the fin structure is not greatly improved; if inclination is greater than 20, then too high to the power requirement of outside component of blowing, power loss is also too big, and inclination is too big simultaneously, has the risk of deformation when flat pipe and fin assemble.

In one embodiment, the inclined surfaces are all at the same angle to the direction in which the opening faces.

So set up, the shaping of fin structure is more convenient, has reduced technology cost to in-process of assembly, fin structure's uniformity is better.

In one embodiment, the inclined surface close to the flat tube groove has an included angle with the orientation of the opening smaller than the included angle of the inclined surface far away from the flat tube groove with the orientation of the opening.

So set up, be favorable to fin structure and air heat transfer.

In one embodiment, the curvature of the connection between the inclined surfaces is continuous.

With the arrangement, the surface of the fin structure is smoother, dust accumulation is reduced, and liquid flows more smoothly.

In one embodiment the number of inclined segments is 3-5.

So set up, the increase of slope section quantity can make the crest and the trough quantity on fin structure surface denser, the flow path of air has also further been increased yet, the area of contact of fin structure and air and to factors such as the flow resistance of air have been improved, thereby fin structure's heat exchange efficiency has been improved, when fin structure's slope section is three, can reduce the power requirement to outside blast element, when fin structure's slope section is five, then can improve fin structure's heat exchange efficiency.

In one embodiment, the fin structure is formed into an undulating shape by a bending process.

So set up, the fin structure is through the shaping of buckling of material itself, need not to add the structure in addition, reduces the consumptive material, reduce cost.

In one embodiment, a protrusion is provided at the edge of the flat tube slot, and the protrusion extends in a direction perpendicular to the direction of the opening.

So set up, when making things convenient for a plurality of fin structures and flat tub of cooperation, the interval control between a plurality of adjacent fin structures also can guarantee the interval uniformity between a plurality of fins.

In one embodiment, the inner wall of the opening is provided with a guide section, and the guide section is connected with the inner wall of the flat tube groove.

So set up, can guide its direction when flat tub of assembly, be convenient for flat tub of insert in the flat tube seat.

The utility model also provides a heat exchanger, include as above fin structure.

Compared with the prior art, the utility model provides a fin structure passes through the design of ripple formula, and the air flows through the fin structure of wave shape can be under the unchangeable condition of total width, makes the air lengthen at the flow path on fin structure surface, prolongs the time of air and fin structure surface contact, increases the area of contact of air and fin structure, thereby improves heat exchange efficiency, and corrugated fin still can strengthen the resistance that air flow received, makes air velocity slow down, can improve the time that the air stayed on fin structure surface equally, promotes heat exchange efficiency; in addition, because the inclined section extends from one end of the fin structure to the other end, drainage can be smoother, and moisture is prevented from staying or even condensing on the fins.

Drawings

Fig. 1 is a schematic structural diagram of a fin structure provided by the present invention;

fig. 2 is a cross-sectional view of a fin structure provided by the present invention;

fig. 3 is the structural schematic diagram of the fin structure provided by the utility model with the first and second flanges.

The symbols in the figures represent the following:

100. a fin structure; 10. a flat pipe groove; 11. a guide section; 12. an opening; 20. an inclined section; 21. an inclined surface; 30. a protrusion; 40. a first flanging; 50. and a second flanging.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.

It will be understood that when an element is referred to as being "secured to" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used in the description of the present application are for illustrative purposes only and do not represent the only embodiments.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact via an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the description of the present application, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1-3, the present invention provides a fin structure 100, which is applied to a micro-channel heat exchanger and is inserted and matched with a heat exchange tube, so as to increase the contact area between the heat exchanger and air and improve the heat exchange efficiency.

A fin structure 100 is characterized in that a flat tube slot 10 is formed in the fin structure 100, the flat tube slot 10 penetrates through the side portion of the fin structure 100 to form an opening 12, a flat tube penetrates through the flat tube slot 10, the flat tube is inserted into the flat tube slot 10 from the opening 12, and a medium flows through the flat tube to absorb or release heat of air in cooperation with the fin structure 100;

fin structure 100 includes a plurality of slope sections 20, and a plurality of slope sections 20 all extend to the other end from fin structure 100's one end, and a plurality of slope sections 20 end to end in proper order constitute wavy shape, and the both sides face that the slope section is dorsad is the inclined plane that sets up for opening 12's orientation slope.

Due to the arrangement, the air flowing through the wavy fin structure 100 can be longer in flow path on the surface of the fin structure 100 under the condition that the total width is unchanged, the contact time of the air and the surface of the fin structure 100 is prolonged, and the contact area of the air and the fin structure 100 is increased, so that the heat exchange efficiency is improved, the corrugated fin can also enhance the resistance force on the air flow, the air flow speed is reduced, the retention time of the air on the surface of the fin structure 100 can be prolonged, and the heat exchange efficiency is improved; in addition, since the inclined section 20 extends from one end to the other end of the fin structure 100, drainage is smoother, preventing moisture from staying or even condensing on the fins.

It will be understood that, referring to fig. 1, the direction in which the openings 12 face is the direction in which the openings 12 face away from the bottom of the flat tube channel 10.

Specifically, the included angle α between the inclined surfaces 21 and the direction in which the opening 12 faces is 5 ° to 20 °, for example, 5 °, 8 °, 12 °, 13 °, 15 °, 18 ° or 20 °, so as to enable the inclination of the inclined surfaces 21 to be a reasonable value, and if the inclined angle is smaller than 5 °, the fin structure 100 does not greatly improve the heat exchange efficiency; if inclination is greater than 20 °, then the power requirement to the external blowing component is too high, and power loss is also too big, and inclination is too big simultaneously, has the risk of deformation when flat pipe assembles with fin structure 100.

It should be understood that the included angle refers to the smallest positive angle formed between the inclined surface 21 and the flat tube groove 10, and in the present embodiment, the included angle α is represented as an acute angle.

Further, the plurality of inclined surfaces 21 are all at the same angle to the direction in which the opening 12 faces. So set up, fin structure 100's shaping is more convenient, has reduced technology cost to the in-process of assembly, a plurality of fin structure 100's uniformity is better.

Preferably, the inclined surfaces 21 each have an angle α of 8 ° with the direction in which the opening 12 faces. At this inclination the ratio of the heat exchange efficiency and the power requirement to the external blowing element is optimal.

In an embodiment, the included angle between the inclined surface 21 close to the flat tube groove 10 and the orientation of the opening 12 is smaller than the included angle between the inclined surface 21 far from the flat tube groove 10 and the orientation of the opening 12, so as to improve the heat exchange efficiency of the fin structure 100 with air, specifically, in this embodiment, the side of the inclined surface 21 close to the flat tube groove 10 is the windward side, the side far from the flat tube groove 10 is the leeward side, and moisture in air is easy to condense at the leeward side far from the flat tube groove 10, and flows and drops along the inclined surface 21 on the leeward side, so as to facilitate water drainage.

The curvature of the connection between the inclined surfaces 21 is continuous. So set up, fin structure 100 surface is more smooth, reduces the dust accumulation, makes the flow of liquid more smooth.

The curvature continuity means that the inclined surfaces 21 are connected by a smooth transition section, and the connection between the inclined surfaces 21 has no discontinuous drop.

The fin structure 100 includes three, four or five inclined sections 20. The increase of the number of the inclined sections 20 can make the number of wave crests and wave troughs on the surface of the fin structure 100 more dense, and further increases the flow path of air, improves the contact area of the fin structure 100 and the air, the flow resistance to the air and other factors, thereby improving the heat exchange efficiency of the fin structure 100, when the inclined sections 20 of the fin structure 100 are three, the power requirement on an external blowing element can be reduced, and when the inclined sections 20 of the fin structure 100 are five, the heat exchange efficiency of the fin structure 100 can be improved.

The fin structure 100 is formed in a wave shape by a bending process. So set up, the shaping is buckled through material itself to fin structure 100, need not to add the structure in addition, reduces the consumptive material, reduce cost.

Of course, it is understood that the fin structure 100 can be formed into the wave shape by other processes, such as a stamping process.

Referring to fig. 3, the inner wall of the flat pipe slot 10 is formed with flanges including a first flange 40 and a second flange 50, the second flange 50 surrounds the edge of the flat pipe slot 10, and the first flange 40 is disposed on the second flange 50 to enhance the strength of the flanges. Second turn-ups 50 and flat tub butt can increase the area of contact between fin structure 100 and the flat tub to improve the steadiness that both are connected, the interval between a plurality of fin structure 100 of second turn-ups 50 ability effective control heat exchanger simultaneously, the equipment of the heat exchanger of being convenient for.

The edge of the flat pipe groove 10 is provided with a protrusion 30, the protrusion 30 is arranged on the first flanging 40, and the protrusion 30 extends towards the direction perpendicular to the direction towards the opening 12. So set up, when making things convenient for a plurality of fin structures 100 and flat tub of cooperation, the interval control between a plurality of adjacent fin structures 100 also can guarantee the interval uniformity between a plurality of fin structures 100.

The surface of the protrusion 30 facing the adjacent fin structure 100 is flat, and can better fit with the side surface of the adjacent fin structure 100.

The plurality of projections 30 may be provided, and the projections 30 of the adjacent fin structures 100 may abut against each other or may be arranged in a staggered manner, thereby adjusting the pitch between the adjacent fin structures 100.

The notch department of flat tub of groove 10 is equipped with guide section 11, and guide section 11 and flat tub of groove 10's inner wall connection can guide its direction when flat tub of assembly, and the flat pipe of being convenient for inserts in flat tub of groove 10.

In one embodiment, the guiding section 11 is a bevel formed by chamfering, and in other embodiments, the guiding section 11 may also be a cambered surface formed by rounding.

The utility model also provides a heat exchanger, include as above fin structure 100.

Compared with the prior art, the utility model provides a fin structure 100 passes through the design of ripple formula, the air flows through the fin structure 100 of wave shape can be under the unchangeable condition of total width, make the air lengthen at the flow path on fin structure 100 surface, the time of extension air and the surface contact of fin structure 100, the area of contact of increase air and fin structure 100, thereby improve heat exchange efficiency, the corrugated fin can also strengthen the resistance that the air flow received, make air flow rate slow down, can improve the time that the air stops on fin structure 100 surface equally, promote heat exchange efficiency; in addition, since the inclined section 20 extends from one end to the other end of the fin structure 100, drainage is smoother, preventing moisture from staying or even condensing on the fins.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A fin structure is applied to a micro-channel heat exchanger, the fin structure is provided with a flat tube slot (10), the flat tube slot (10) penetrates through one side of the fin structure to form an opening (12), a flat tube penetrates through the flat tube slot (10), and a medium flows through the flat tube to absorb or release heat of air by matching with the fin structure;

the fin structure is characterized by comprising a plurality of inclined sections (20), wherein the inclined sections (20) extend from one end to the other end of the fin structure, the inclined sections (20) are sequentially connected to form a wavy shape, and two opposite side surfaces of each inclined section (20) back to each other are inclined surfaces (21) which are obliquely arranged relative to the direction of the opening (12).

2. Fin structure according to claim 1, characterized in that the angle a between the inclined surfaces (21) and the orientation of the opening (12) is 5-20 °.

3. The fin structure according to claim 1, wherein a plurality of the inclined surfaces (21) are all at the same angle to a direction in which the opening (12) faces.

4. The fin structure according to claim 1, wherein the inclined surface (21) near the flat tube groove (10) has a smaller angle with the orientation of the opening (12) than the inclined surface (21) away from the flat tube groove (10).

5. The fin structure according to claim 1, wherein a connection curvature between the inclined surfaces (21) is continuous.

6. Fin structure according to claim 1, characterized in that the number of inclined segments (20) is 3-5.

7. The fin structure according to claim 1, wherein the fin structure is formed into an undulating shape by a bending process.

8. Fin structure according to claim 1, characterized in that at the edge of the flat tube slot (10) a protrusion (30) is provided, which protrusion (30) extends in a direction perpendicular to the orientation of the opening (12).

9. The fin structure according to claim 1, wherein the inner wall at the opening (12) is provided with a guide section (11), and the guide section (11) is connected with the inner wall of the flat tube groove (10).

10. A heat exchanger, characterized by comprising a fin structure according to any one of claims 1 to 9.