CN210345963U - Micro-channel heat exchanger - Google Patents

Abstract

The utility model discloses a microchannel heat exchanger. The device comprises a microchannel flat pipe group, a collecting pipe I, a collecting pipe II, a fin group, an upper side plate, a lower side plate, a horizontal side plate, a left side plate and a right side plate, wherein two ends of the microchannel flat pipe group are respectively communicated with the collecting pipe I and the collecting pipe II; two ends of the upper side plate in the length direction are respectively provided with a notch, and the length direction of the notch is vertical to the length direction of the upper side plate; the depth direction of the notch is the thickness direction of the upper plate; the back of the notch is provided with a convex rib positioned in the concave structure of the upper edge plate; the upper edge plate and the lower edge plate have the same structure. The design of the notch reduces the tensile stress of the product in furnace-passing welding, and the design of the convex rib prevents the solder on the collecting pipe from flowing into the cavities of the upper edge plate and the lower edge plate in the furnace-passing welding process.

Description

Micro-channel heat exchanger

Technical Field

The utility model relates to a microchannel heat exchanger, it has special sideboard structure.

Background

The traditional air-conditioning heat exchanger always adopts a finned tube structure, the technology of the traditional air-conditioning heat exchanger is relatively mature, but along with the continuous improvement of the requirements of the traditional air-conditioning on compactness, high efficiency and low cost, the finned tube heat exchanger is more and more difficult to meet the requirements, and meanwhile, the traditional finned tube heat exchanger also has the defects of lower heat exchange efficiency, large volume, easy leakage of refrigerant and the like generally, so that a microchannel heat exchanger with better performance is suitable for air-conditioning equipment, and the characteristics of compact structure, high heat exchange efficiency and the like have breakthrough significance for the development of the air-conditioning equipment.

In prior art, microchannel heat exchanger generally is including adopting multiple structural style, and the heat exchange tube generally adopts the flat pipe that has many microchannels, is provided with heat transfer fin between the flat pipe, and the flat pipe passes through the welded mode to be fixed on the pressure manifold. Wherein, the upper and lower sides of the flat pipe group are provided with an upper and a lower side plates. The micro-channel heat exchanger on the market at present mainly faces to household air-conditioning equipment and refrigeration equipment in the industrial field, the upper and lower side plates are flat plates with certain bending at two ends, the upper and lower side plates are connected with the collecting pipe and the fins by welding, and solder on the collecting pipe flows along the upper and lower side plates when the side plates are welded in a furnace; and tensile stress exists in the edge plates after furnace-passing welding, so that the installation and the use of the subsequent microchannel heat exchanger are influenced.

Disclosure of Invention

The utility model aims at perfecting the defects of the prior art and providing a micro-channel heat exchanger.

A micro-channel heat exchanger comprises a flat tube group, a fin group, a first collecting tube, a second collecting tube, an upper edge plate, a lower edge plate, a first adapter, a second adapter, a first external tube, a second external tube and an end cover group; the two ends of the flat pipe group are respectively communicated with the first collecting pipe and the second collecting pipe, the fin group is brazed between every two micro-channel flat pipes in the flat pipe group, the upper side plate and the lower side plate are arranged on the upper side and the lower side of the flat pipe group, the first adapter seat and the second adapter seat are respectively welded on the first collecting pipe and the second collecting pipe, the first external connecting pipe and the second external connecting pipe are respectively welded in the first adapter seat and the second adapter seat, and the end cover groups are respectively fixed on the upper end face and the lower end face of the first collecting pipe and the second; the upper side plate is of a groove-shaped structure consisting of a horizontal side plate and a left side plate and a right side plate which are connected to the horizontal side plate; two ends of the upper side plate in the length direction are respectively provided with a notch, and the length direction of the notch is vertical to the length direction of the upper side plate; the depth direction of the notch is the thickness direction of the upper plate; the back of the notch is provided with a convex rib positioned in the concave structure of the upper edge plate; the upper edge plate and the lower edge plate have the same structure; when the upper side plate and the lower side plate are installed on the micro-channel heat exchanger, the horizontal side plate faces the flat tube group, and the left side plate and the right side plate face outwards.

Preferably, the notch is formed in the thickness direction of the upper side plate or the lower side plate from the surface of the horizontal side plate; the depth of the notch is larger than the thickness of the horizontal side plate and smaller than the width of the left side plate and the right side plate.

Preferably, the width of the upper edge plate and the width of the lower edge plate are greater than or equal to the width of the flat pipe group.

Preferably, fin groups are arranged between the upper edge plate and the flat tube group and between the lower edge plate and the flat tube group

Preferably, the end parts of the two ends of the horizontal side plate are provided with arc-shaped notches matched with the outer surface of the collecting pipe.

Preferably, the upper edge plate and the lower edge plate are welded and then integrated with the first collecting pipe, the second collecting pipe and the fin group.

Preferably, the distance between the notch and the nearest one or two surfaces of the collecting pipe is less than 10 mm.

Preferably, the horizontal side plate, the left side plate and the right side plate are designed integrally.

Preferably, the left side plate and the right side plate are formed by bending the horizontal side plate to the same side.

Use the utility model discloses, the notch (protruding muscle) design of top board and lower sideboard has reduced the product and has crossed stove welded tensile stress, and simultaneously, the design of protruding muscle has blocked in the cavity of the solder inflow top board and lower sideboard on the pressure manifold when crossing stove welding (the solder shows the characteristic that appears along upper and lower sideboard recess shape structure flow when crossing stove welding, the product technology side administrative cost is reduced. The probability of welding the process fins on the product after passing through the furnace is reduced, the labor cost of later-stage product appearance treatment is reduced, and the attractiveness of the product is improved.

Drawings

FIG. 1 is a schematic view of a microchannel heat exchanger according to the present invention;

fig. 2 is a side view of the upper board of the present invention;

FIG. 3 is a partial view (notch) of the end of the upper board (lower board) of the present invention;

FIG. 4 is a partial schematic view (convex rib) of the end of the upper board (lower board) of the present invention;

fig. 5 is a schematic top view of the upper board of the present invention;

in the figure, a flat tube group 1, a fin group 2, a first collecting tube 3, a second collecting tube 4, an upper edge plate 5, a lower edge plate 6, a first adapter seat 7, a second adapter seat 8, a first external connecting tube 9, a second external connecting tube 10, an end cover group 11, a horizontal edge plate 51, a right side plate 52, a left side plate 53, a notch 54, a convex rib 55 and an arc-shaped notch 56.

Detailed Description

As shown in fig. 1 to 5, a microchannel heat exchanger includes a flat tube group 1, a fin group 2, a first collecting tube 3, a second collecting tube 4, an upper edge plate 5, a lower edge plate 6, a first adapter 7, a second adapter 8, a first external tube 9, a second external tube 10, and an end cover group 11; the two ends of a flat pipe group 1 are respectively communicated with a first collecting pipe 3 and a second collecting pipe 4, a fin group 2 is brazed between every two micro-channel flat pipes in the flat pipe group 1, an upper side plate 5 and a lower side plate 6 are arranged on the upper side and the lower side of the flat pipe group 1, a first adapter seat 7 and a second adapter seat 8 are respectively welded on the first collecting pipe 3 and the second collecting pipe 4, a first external connecting pipe 9 and a second external connecting pipe 10 are respectively welded in the first adapter seat 7 and the second adapter seat 8, and an end cover group 11 is respectively fixed on the upper end face and the lower end face of the first collecting pipe 3 and the second collecting pipe; the device is characterized in that the upper side plate 5 is a groove-shaped structure consisting of a horizontal side plate, a left side plate and a right side plate which are connected with the horizontal side plate; two ends of the upper edge plate 5 in the length direction are respectively provided with a notch, and the length direction of the notch is vertical to the length direction of the upper edge plate 5; the depth direction of the notch is the thickness direction of the upper edge plate 5; the back of the notch is provided with a convex rib positioned in the concave structure of the upper edge plate; the upper edge plate 5 and the lower edge plate 6 have the same structure; when the upper side plate 5 and the lower side plate 6 are installed on the micro-channel heat exchanger, the horizontal side plates of the upper side plate and the lower side plate are arranged towards the flat tube group, and the left side plate and the right side plate face outwards.

As shown in fig. 2 and 3, in an embodiment of the present invention, the opening of the notch is described by taking the upper edge plate 5 as an example, and the notch is opened from the surface of the horizontal edge plate to the thickness direction of the upper edge plate 5; the depth of the notch is larger than the thickness of the horizontal side plate and smaller than the width of the left side plate and the right side plate. The arrangement of the upper notch of the lower edge plate 6 is completely the same as that of the upper edge plate 5; in fact, the utility model discloses a lower bolster 6 and last curb plate 5 are the structure identical, are same part promptly, when only installing on the microchannel heat exchanger, both are symmetrical about the intermediate line of heat exchanger.

In a specific embodiment of the present invention, the width of the upper side plate 5 and the lower side plate 6 is greater than or equal to the width of the flat tube group 1.

In an embodiment of the present invention, the fin groups 2 are disposed between the upper side plate 5 and the flat tube group 1, and between the lower side plate 6 and the flat tube group 1

In an embodiment of the present invention, the ends of the horizontal side plates are provided with arc-shaped notches 56 matching with the outer surface of the collecting main. The arc-shaped notch is matched with the outer surface of the collecting pipe, so that the welding is convenient.

In a specific embodiment of the present invention, the upper edge plate 5 and the lower edge plate 6 are welded to form a whole with the first collecting pipe 3, the second collecting pipe 4 and the fin assembly 2. The notch design of upper plate and lower bolster has reduced the tensile stress that the stove welding was crossed to the product, the utility model discloses product performance after the welding is good.

In an embodiment of the present invention, the distance between the notch and the surface of the nearest header pipe 3 or header pipe two 4 is less than 10 mm. The notches should not be spaced too far from the manifold to block solder flow. And when the notch is located near the collecting pipe, the tensile stress eliminating effect is better.

Preferably, the horizontal side plate, the left side plate and the right side plate are designed integrally, for example, the horizontal side plate, the left side plate and the right side plate can be formed by stamping, molding and the like, and the groove-shaped structural side plate is a part commonly used in the industry and can also be purchased directly. As an alternative, the left side plate and the right side plate are formed by bending the horizontal side plates to the same side. The bending angle may be 30-90 deg..

Claims (9)

1. A micro-channel heat exchanger comprises a flat tube group (1), a fin group (2), a first collecting tube (3), a second collecting tube (4), an upper side plate (5), a lower side plate (6), a first adapter (7), a second adapter (8), a first external tube (9), a second external tube (10) and an end cover group (11); the two ends of a flat pipe group (1) are respectively communicated with a first collecting pipe (3) and a second collecting pipe (4), a fin group (2) is brazed between every two micro-channel flat pipes in the flat pipe group (1), an upper side plate (5) and a lower side plate (6) are arranged on the upper side and the lower side of the flat pipe group (1), a first adapter seat (7) and a second adapter seat (8) are respectively welded on the first collecting pipe (3) and the second collecting pipe (4), a first external pipe (9) and a second external pipe (10) are respectively welded in the first adapter seat (7) and the second adapter seat (8), and end cover groups (11) are respectively fixed on the upper end faces and the lower end faces of the first collecting pipe (3) and the second collecting pipe (4); the upper side plate (5) is a groove-shaped structure consisting of a horizontal side plate, a left side plate and a right side plate which are connected with the horizontal side plate; two ends of the upper edge plate (5) in the length direction are respectively provided with a notch, and the length direction of the notch is vertical to the length direction of the upper edge plate (5); the depth direction of the notch is the thickness direction of the upper edge plate (5); the back of the notch is provided with a convex rib positioned in the concave structure of the upper edge plate; the upper edge plate (5) and the lower edge plate (6) have the same structure; when upper sideboard (5) and lower sideboard (6) are installed on the microchannel heat exchanger, its horizontal sideboard sets up towards the flat nest of tubes, and left side board and right side board are outwards.

2. The microchannel heat exchanger as set forth in claim 1, wherein the notch is formed from the surface of the horizontal side plate in the thickness direction of the upper side plate (5) or the lower side plate (6); the depth of the notch is larger than the thickness of the horizontal side plate and smaller than the width of the left side plate and the right side plate.

3. The microchannel heat exchanger according to claim 1, wherein the width of the upper and lower side plates (5, 6) is equal to or greater than the width of the flat tube group (1).

4. A microchannel heat exchanger according to claim 1 wherein the fin groups (2) are provided between the upper edge plate (5) and the flat tube group (1) and between the lower edge plate (6) and the flat tube group (1).

5. The microchannel heat exchanger of claim 1, wherein the horizontal side plates have arcuate notches at opposite ends to match the outer surface of the manifold.

6. The micro-channel heat exchanger according to claim 4, wherein the upper edge plate (5) and the lower edge plate (6) are welded to be integrated with the first collecting pipe (3), the second collecting pipe (4) and the fin group (2).

7. The microchannel heat exchanger of claim 1 wherein the slot is less than 10mm from the surface of the nearest header (3) or header (4).

8. The microchannel heat exchanger of claim 1, wherein the horizontal side plate, the left side plate and the right side plate are of an integral design.

9. The microchannel heat exchanger of claim 8, wherein the left and right side plates are formed by bending horizontal side plates to the same side.

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