WO2020062722A1

WO2020062722A1 - Fin and heat exchanger having same

Info

Publication number: WO2020062722A1
Application number: PCT/CN2019/071954
Authority: WO
Inventors: 朱守朝; 张有林; 薛震; 吴迎文
Original assignee: 珠海格力电器股份有限公司
Priority date: 2018-09-30
Filing date: 2019-01-16
Publication date: 2020-04-02
Also published as: CN109186306A

Abstract

A fin and a heat exchanger having same. The fin has a windward side (1) and an opposite leeward side (2), the fin is provided with one or more flat tube grooves (3), the flat tube grooves (3) are used for mounting flat tubes, the flat tube grooves (3) extend from the windward side (1) toward the leeward side (2), the flat tube grooves (3) divide the fin into a plurality of fin units (5), each of the fin units (5) is provided with one or more flow guiding structures, the flow guiding structures are used for guiding a gas flowed in one side of the fin through the fin to flow to the other side of the fin. The present invention is able to extend the flow path of gas flow, improve the heat exchange efficiency of a heat exchanger, and ensure the heat exchange uniformity of a gas.

Description

Fin and heat exchanger with same

Technical field

The invention relates to the technical field of heat exchange, in particular to a fin and a heat exchanger having the same.

Background technique

The micro-channel heat exchanger is a new type of high-efficiency heat exchanger, which has the advantages of high heat transfer efficiency, small size, light weight, and low charge. The fins of the traditional single-cooled micro-channel heat exchanger are Wavy shape, then brazed between the two flat tubes above and below.

At present, there is a slot-type fin in the industry, which is used for cold and warm micro-channel heat exchangers. The circulating airflow and flat tubes exchange heat. The airflow path affects the heat exchange efficiency of the heat exchanger. The existing fin structure causes the airflow and The efficiency of flat tube heat exchange is low, and the airflow heat exchange is insufficient.

Summary of the Invention

An object of the present invention is to provide a fin and a heat exchanger having the same, which can extend the flow path of the air flow, improve the heat exchange efficiency of the heat exchanger, and ensure the uniformity of gas heat exchange.

The embodiments of the present invention are implemented as follows:

A fin has an upwind side and an opposite downwind side. The fin is provided with one or more flat tube grooves, and the flat tube grooves are used to install flat tubes. The upwind side extends toward the downwind side;

The flat tube groove divides the fin into a plurality of fin units, and each of the fin units is provided with one or more flow guiding structures that guide the gas flowing through one side of the fins Circulate through the fins to the other side of the fins.

Preferably, the fins are further provided with positioning support pieces for stacking the fins to form a sheet pitch;

The height of the flow guide structure protruding from the fin is H1, the height of the positioning support piece protruding from the fin is H, and the H1 is greater than or equal to one-third H and less than or equal to one-third Second, the positioning support sheet is used to determine the distance between the fins when they are stacked to prevent the diversion structure from affecting the assembly of the fins.

Preferably, the above-mentioned flow guiding structure is a window opening cut out by the fin unit, and the air inlet of the window opening faces the windward side.

Further, the airflow flows from the upwind side to the downwind side. The opening window is approximately rectangular and is cut and bent relative to the fins. The opening window changes a part of the gas flow path from the surface of the fins. The opening window faces the leeward side. One edge is a bent edge, and the two sides adjacent to the opening window and the bending edge are connected to the fins. The side of the opening window facing the upwind side forms an air inlet with the fins, and the air flows from the opening of the opening window. The air inlet enters through the fins and flows to the other side of the fins.

Preferably, the window opening sheet includes an upper opening sheet and a lower opening sheet, and the fin includes an upper surface and a lower surface;

The upper opening window is cut to face the upper surface side of the fin, and the lower opening window is cut to face the lower surface side of the fin.

Preferably, each of the fin units is provided with a plurality of guide structures arranged along the extending direction of the flat tube groove;

The opening interval between the upper opening window and its adjacent lower opening window facing to the windward side is L3, and the opening length of the upper opening window in the extending direction of the flat tube groove is L2;

The L3 is less than or equal to L2.

Preferably, an opening interval between the upper opening window and an adjacent lower opening window facing the leeward side is L1, and a window opening length of the lower opening window in the extending direction of the flat tube groove is L4;

L1 or L3 is less than or equal to L4 or L2.

Preferably, an included angle between the upper opening window sheet and the fin facing the windward side is A, and the included angle A is 20 ° or more and 45 ° or less.

Preferably, an included angle between the lower opening window sheet and the fin facing the windward side is B, and the included angle B is 20 ° or more and 45 ° or less.

Preferably, each of the fin unit is provided with a plurality of window openings arranged along the extending direction of the flat tube groove, and the cut-ups of the window openings face the same side of the fins.

Preferably, the window opening length of the window opening sheet in the direction in which the flat tube groove extends is L5, and the opening distance between adjacent window opening sheets in the direction in which the flat tube groove extends is L6, and L6 is less than or equal to L5 .

Preferably, an included angle between the window opening sheet and the fin facing the windward side is C, and the included angle C is 20 ° or more and 45 ° or less.

A heat exchanger includes a flat tube and the aforementioned fins.

The beneficial effects of the embodiments of the present invention are:

By providing a flow guide structure on the fin unit, the flow guide structure changes a part of the gas circulation path from the surface of the fin, and the flow guide structure guides the air flow from one side of the fin through the fin to the other side of the fin, effectively extending The flow path of the air flow is improved, the heat exchange efficiency is improved, and the heat exchange uniformity of the heat exchanger is ensured.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to explain the technical solution of the embodiments of the present invention more clearly, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and therefore are not It should be regarded as a limitation on the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without paying creative work.

FIG. 1 is a schematic view of a three-dimensional structure of a fin according to Embodiment 1 of the present invention; FIG.

2 is a schematic cross-sectional structure diagram of a fin according to Embodiment 1 of the present invention;

3 is a schematic view of a fin guide structure according to Embodiment 1 of the present invention;

4 is a schematic diagram of a fin and a flat pipe installation structure according to Embodiment 1 of the present invention;

5 is a schematic view of a three-dimensional structure of a fin according to Embodiment 2 of the present invention;

6 is a schematic diagram of a gas circulation structure according to Embodiment 2 of the present invention;

FIG. 7 is a schematic diagram of a fin and a flat tube installation structure according to Embodiment 2 of the present invention.

Icons: 1. Upwind side; 2. Downwind side; 3. Flat tube groove; 4. Positioning support piece; 41. First support piece; 42; Second support piece; 5. Fin unit; 51. Opening window; 52, upper surface; 53, lower surface; 511, upper opening window; 512, lower opening window; 6, reinforcing protrusions; 7, reinforcing ribs; 8, flanging; 9, flat tube.

detailed description

In order to make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of the embodiments of the present invention, but not all the embodiments. The components of embodiments of the invention, generally described and illustrated in the figures herein, can be arranged and designed in a variety of different configurations.

Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be noted that similar reference numerals and letters indicate similar items in the following drawings, so once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.

In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the product of the invention is used, and is only for the convenience of describing the present invention and simplifying the description, and is not intended to indicate or imply The device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third" and the like are only used to distinguish descriptions, and cannot be understood to indicate or imply relative importance.

In addition, the terms "horizontal" and "vertical" do not mean that the component is required to be absolutely horizontal or drooping, but may be slightly inclined. For example, "horizontal" simply means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but it can be tilted slightly.

In the description of the present invention, it should also be noted that the terms "setup", "installation", "connected", and "connected" should be understood in a broad sense, for example, fixed connections, unless otherwise specified and limited. It can also be a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.

Example 1:

1-4, this embodiment provides a fin and a heat exchanger having the same. The fin has an upwind side 1 and an opposite downwind side 2. The fin is provided with one or more flat tube grooves 3. The pipe slot 3 is used to install the flat pipe 9. The flat pipe slot 3 extends from the upwind side 1 to the downwind side 2. The slot of the flat pipe slot 3 is located on the upwind side 1. The ribs 7 are provided on both sides of the slot. The flat pipe slot 3 Also provided with flanging 8.

The flat tube groove 3 divides the fins into a plurality of fin units 5, and each fin unit 5 is provided with one or more flow guiding structures. The flow guiding structures are the opening windows 51 cut out by the fin units 5 and opening windows. The air inlet of the fin 51 faces the upwind side 1, and the flow guiding structure guides the gas flowing on one side of the fins through the fins and flows to the other side of the fins, effectively extending the flow path of the airflow, improving the heat exchange efficiency and ensuring the heat. Heat exchange uniformity of the exchanger.

The fins are also provided with positioning support pieces 4 for stacking the fins to form a sheet pitch. The positioning support pieces 4 include a first support piece 41 and a second support piece 42. Each fin unit 5 is provided near the upwind side 1 with a first The supporting piece 41 is provided with a second supporting piece 42 near the leeward side 2 and the reinforcing protrusions 6 are spaced apart from the second supporting piece 42. The fins are provided with a wave-shaped bend near the leeward side 2 and the wave-shaped bend is used for drainage dew.

The height of the diversion structure protruding from the fin is H1, and the height of the positioning support piece 4 is H from the fin. H1 is greater than or equal to one-third H and less than or equal to two-thirds H. The positioning support piece 4 is used for Determine the distance between the fins during stacking to prevent the diversion structure from affecting the assembly of the fins.

The airflow flows from the upwind side 1 to the downwind side 2. The opening window 51 is approximately rectangular and is cut and bent relative to the fins. The opening window 51 changes a part of the gas flow path from the surface of the fins, and the opening window 51 faces downwind. One side of side 2 is a bent edge. Two sides adjacent to the opening window 51 and the bending edge are connected to the fins. The side of the opening window 51 facing the upwind side 1 forms an air inlet with the fins, and the airflow After entering from the air inlet, it passes through the fins and flows to the other side of the fins.

As shown in FIG. 1 and FIG. 3, each fin unit 5 is provided with a plurality of guide structures arranged along the extending direction of the flat tube groove 3; the window opening 51 includes an upper opening window 511 and a lower opening window 512. The sheet includes an upper surface 52 and a lower surface 53. The upper opening window 511 is cut to the side of the upper surface 52 of the fin, and the lower opening window 512 is cut to the side of the lower surface 53 of the fin; the upper opening window 511 and the The opening interval between the adjacent lower opening windows 512 facing the windward side 1 is L3, and the opening length of the upper opening window 511 in the extending direction of the flat tube groove 3 is L2, and L3 is less than or equal to L2;

The opening interval between the upper opening window 511 and the adjacent lower opening window 512 facing the leeward side 2 is L1, and the opening length of the lower opening window 512 in the direction of the flat tube groove 3 extension is L4, L1 Or L3 is less than or equal to L4 or L2; the angle between the upper opening window 511 and the fins facing the windward side 1 is A, the included angle A is greater than or equal to 20 ° and less than or equal to 45 °, and the lower opening window 512 and the fins are facing the windward side 1 The included angle is B, and the included angle B is greater than or equal to 20 ° and less than or equal to 45 °; the airflow passes through the upper surface 52 and the lower surface 53 of the fin unit 5 and flows in an S shape toward the leeward side 2, and the fin's own wind resistance decreases. The air flow on the upper surface 52 and the small surface of the fin is improved, the flow path of the air flow is extended, the heat exchange path of the air flow is relatively extended, and the heat exchange capacity of the fin is improved.

With reference to Fig. 4 and Figs. 1-3, a heat exchanger, a flat tube 9 is snapped into a flat tube groove 3, the heat exchanger includes a plurality of fins and a plurality of flat tubes 9, with the upper surface 52 of the fins facing For the forward direction, each fin is sequentially lined up to form a fin group. A plurality of the flat tubes 9 are respectively inserted into the flat tube grooves 3 of the fin group. The upper opening windows 511 and The opening length, cut-up height, cut-off angle, and distance between each other of the lower opening window 512 allow the airflow flowing from the upper surface 52 and the lower surface 53 of the fins to repeatedly flow between the upper opening window 511 and the lower opening window 512. Interspersed between them, it is “S” -shaped forward flow to the downwind side 2, which promotes the air flow exchange between the upper surface 52 and the lower surface 53 of the fins, extends the heat exchange path of the air flow, improves the heat exchange performance of the heat exchanger, and increases the heat exchanger. Uniformity of heat transfer.

Example 2:

Based on the structure and principle of Embodiment 1, in conjunction with Figures 5-7, this embodiment provides a fin and a heat exchanger having the same. The fin has an upwind side 1 and an opposite downwind side 2. The fins are provided with One or more flat tube slots 3, flat tube slots 3 are used to install flat tubes 9, flat tube slots 3 extend from the upwind side 1 to the downwind side 2, and the slot of the flat tube slot 3 is located on the upwind side 1, on both sides of the slot A reinforcing rib 7 is provided, and the flat tube groove 3 is also provided with a flanging 8.

The flat tube groove 3 divides the fins into a plurality of fin units 5, and each fin unit 5 is provided with one or more flow guiding structures. The flow guiding structures are the opening windows 51 cut out by the fin units 5 and opening windows. The air inlet of the fin 51 faces the upwind side 1, and the flow guiding structure guides the gas flowing on one side of the fins through the fins and flows to the other side of the fins, effectively extending the flow path of the airflow, improving the heat exchange efficiency and ensuring the heat Heat exchange uniformity of the exchanger.

With reference to FIG. 6, with reference to FIG. 5 and FIG. 7, each fin unit 5 is provided with a plurality of opening windows 51 arranged along the extending direction of the flat tube groove 3, and the opening of the opening windows 51 faces the same side of the fins. The opening length of the opening window 51 in the extending direction of the flat tube groove 3 is L5, and the opening distance of the adjacent opening window 51 in the extending direction of the flat tube groove 3 is L6, L6 is less than or equal to L5, and the opening window 51 The angle between the fin and the windward side 1 is C, and the included angle C is greater than or equal to 20 ° and less than or equal to 45 °. When the window opening 51 is cut and located on the side of the upper surface 52 of the fin, part of the air flow flowing through the upper surface 52 The window 51 flows to the lower surface 53 of the fins. When the fins are stacked on the flat tube 9 in a forward direction, the upper surface 52 of each layer of fins flows to the lower surface 53 through the window 51 and extends. The heat exchange path of the air flow improves the heat exchange performance of the heat exchanger and increases the uniformity of heat exchange of the heat exchanger.

The above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

A fin, characterized in that the fin has an upwind side (1) and a downwind side (2), the upwind side (1) is opposite to the upwind side (1), and the fins are opened There are one or more flat tube grooves (3), the flat tube grooves (3) are used to install flat tubes, and the flat tube grooves (3) are from the upwind side (1) to the downwind side (2) extend;

The flat tube groove (3) divides the fin into a plurality of fin units (5), and each of the fin units (5) is provided with one or more flow guiding structures, and the flow guiding structures are used for A gas flowing on one side of the fin is guided to flow through the fin to the other side of the fin.
The fin according to claim 1, wherein the fin is further provided with a positioning support sheet (4) for stacking the fins to form a sheet pitch;

The height of the flow guiding structure protruding from the fin is H1, and the height of the positioning support piece (4) protruding from the fin is H, H / 3≤H1≤2H / 3.
The fin according to claim 1, wherein the flow guiding structure is a window opening (51) cut out by the fin unit (5), and an air inlet of the window opening (51) faces The upwind side (1).
The fin according to claim 3, wherein the opening window (51) comprises an upper opening window (511) and a lower opening window (512), and the fin includes an upper surface (52) and Lower surface (53);

The upper opening window (511) is cut to the side of the upper surface (52) of the fin, and the lower opening window (512) is cut to the side of the lower surface (53) of the fin.
The fin according to claim 4, wherein each of the fin units (5) is provided with a plurality of guide structures arranged along the extending direction of the flat tube groove (3);

An opening interval between the upper opening window (511) and the adjacent lower opening window (512) facing the windward side (1) side is L3, and the upper opening window (511) is at The length of the window in the extending direction of the flat tube groove (3) is L2;

L3≤L2.
The fin according to claim 5, characterized in that an opening interval between the upper opening window (511) and the adjacent lower opening window (512) facing the leeward side (2) side Is L1, and the opening length of the lower opening window (512) in the extending direction of the flat tube groove (3) is L4;

L1≤L4, or L1≤L2, or L3≤L4.
The fin according to claim 4, characterized in that the angle between the upper opening window (511) and the fin facing the upwind side (1) is A, and 20 ° ≤A≤45 °.
The fin according to claim 4, wherein an included angle between the lower opening window (512) and the fin facing the windward side (1) is B, and 20 ° ≤B≤45 °.
The fin according to claim 3, wherein each of the fin units (5) is provided with a plurality of opening windows (51) arranged along the extending direction of the flat tube groove (3), and The cut-up of the window opening (51) is located on the same side of the fin.
The fin according to claim 8, characterized in that the window opening length of the window opening piece (51) in the extending direction of the flat tube groove (3) is L5, and the adjacent window opening piece ( 51) The opening spacing in the direction in which the flat tube groove (3) extends is L6, and L6≤L5.
The fin according to claim 9, characterized in that the angle between the window opening (51) and the fin facing the upwind side (1) is C, and 20 ° ≤C≤45 °.
A heat exchanger, comprising a flat tube (9) and the fins according to any one of claims 1-11.