CN219693932U

CN219693932U - Microchannel radiator

Info

Publication number: CN219693932U
Application number: CN202222347903.XU
Authority: CN
Inventors: 朱晓国; 周赛军; 黄洪波; 王云飞
Original assignee: Zhejiang Xinjinchen Machinery Co ltd
Current assignee: Zhejiang Xinjinchen Machinery Co ltd
Priority date: 2022-09-01
Filing date: 2022-09-01
Publication date: 2023-09-15
Anticipated expiration: 2032-09-01

Abstract

The utility model relates to a radiator, in particular to a microchannel radiator, which solves the problems that liquid and gas are easy to generate due to the grooves between flat tubes in a collecting pipe, and the liquid and gas are difficult to flow fully and influence the heat radiation performance in a working state. The microchannel radiator comprises a flat tube, a collecting tube and an inlet and outlet tube, wherein the flat tube is inserted in the collecting tube in parallel, the inlet and outlet tube is fixedly connected to the middle position of the collecting tube, and a cutting groove is arranged at the end part of the flat tube. The utility model reduces the area of the groove, reduces accumulated liquid and accumulated air which are not easy to flow fully, and improves the heat dissipation performance.

Description

Microchannel radiator

Technical Field

The present utility model relates to heat sinks, and more particularly, to a microchannel heat sink.

Background

In the field of the current heat exchangers, the parallel flow microchannel heat radiator is widely applied in terms of the advantages of high heat exchange coefficient, high cost performance and the like, most of the prior art adopts the technology that a microchannel flat tube is inserted into a collecting tube, an inlet tube and an outlet tube are communicated with the collecting tube, so that a refrigerant flows from the inlet tube to the collecting tube and then flows into the flat tube, the microchannel flows into the collecting tube at the flat tube, finally flows into an outlet tube from the collecting tube, and a radiating fin possibly is arranged outside the flat tube to help radiating.

The utility model of publication number CN203231587U discloses a microchannel parallel flow heat exchanger, which is provided with a leeward side and a windward side, and comprises two collecting pipes, a plurality of flat pipes connected between the collecting pipes and spaced in parallel with each other, and a plurality of fins connected on the flat pipes and spaced in parallel with each other, wherein the collecting pipes are vertically arranged, the flat pipes are horizontally arranged, the fins are vertically arranged, each fin is provided with a plurality of slots on the windward side, and the flat pipes are correspondingly inserted into the slots. The cross section of each flat tube is wedge-shaped, the thickness of each flat tube gradually decreases from the windward side to the leeward side, and the slots of the fins are adapted to the cross section of the flat tube.

The flat pipe inserting part in the prior art is a flat notch, the refrigerant liquid can be in a gas-liquid two-phase state in the upper collecting pipe and the lower collecting pipe, the refrigerant liquid can be accumulated at the groove between the two flat pipes, and when in an evaporation working condition, the partial area can be accumulated, the refrigerant liquid cannot flow fully, and the heat exchange performance is affected.

Disclosure of Invention

The present utility model has been made in view of the above problems occurring in the prior art, and an object of the present utility model is to provide a microchannel heat sink.

The aim of the utility model can be achieved by the following technical scheme: the microchannel radiator comprises a flat tube, a collecting tube and an inlet and outlet tube, wherein the flat tube is inserted in the collecting tube in parallel, the inlet and outlet tube is fixedly connected to the middle position of the collecting tube, and a cutting groove is formed in the end part of the flat tube of the microchannel.

In the foregoing micro-channel radiator, the shape of the slot includes a semi-ellipse, and the purpose of the slots of different shapes is to reduce the area between the flat tubes in the collecting pipe, which is easy to accumulate liquid and air, and of course, the different shapes must be provided that the firm brazing can be performed here.

In the above-mentioned microchannel radiator, a plurality of flat tube grooves are equidistantly and are arranged in line on the collecting pipe, each flat tube groove comprises a notch and an inner flanging, and the inner flanging is an integral part of the collecting pipe and is positioned inside the collecting pipe.

In the microchannel radiator, the flat tubes are inserted into the notch and inserted into the collecting pipe, the two sides of the edge of each flat tube are provided with solid side plates, the two ends of each side plate are fixedly connected to the outer sides of the collecting pipe, and the side plates can provide protection for the flat tubes inside and have a structural supporting function.

In the above-mentioned microchannel heat sink, the lowest position of the notch is higher than the inner flange, so that a good position is reserved for subsequent welding.

In the microchannel radiator, the inlet and outlet pipes are communicated with the collecting pipe through the connecting block, and the refrigerant flows into the collecting pipe from the inlet pipe through the connecting block, flows through the flat pipe in the middle, and flows out from the collecting pipe to the collecting pipe through the connecting block.

In the microchannel radiator, the two ends of the collecting pipe are provided with end covers in a sealing manner.

In the microchannel radiator, after the components are assembled, the components are welded into a whole by adopting a brazing process, and the part to be brazed comprises the flat pipe and the collecting pipe, and the flat pipe is inserted into the collecting pipe, so that the flat pipe end part in the interior can be brazed and welded with the collecting pipe, and the protruding length of the flat pipe end is required not to be too short to be welded firmly.

In the microchannel radiator, the fins are arranged between the adjacent flat tubes, and can play a supporting role on the flat tubes, and meanwhile, the microchannel radiator also has the effect of helping heat dissipation.

In the above-mentioned microchannel radiator, a plurality of microchannels are provided in parallel in the flat tube, and openings at two ends of the microchannels are respectively located at two ends of the flat tube.

Compared with the prior art, the part of the flat pipe inserted into the collecting pipe of the micro-channel radiator is changed from a flat notch to a notch comprising a semi-ellipse shape and the like, and the area easy to accumulate liquid is greatly reduced, the accumulated liquid and the accumulated gas which are not easy to flow fully are reduced, and the heat dissipation performance is improved on the premise of ensuring that the welding is firm.

Drawings

FIG. 1 is an overall schematic of a microchannel heat sink of the present utility model;

FIG. 2 is a schematic view of a flat tube cloud slot of a microchannel heat sink of the present utility model inserted into the manifold interior;

FIG. 3 is a schematic view of a flat tube semicircular slot of a microchannel heat sink of the present utility model inserted into the manifold interior;

FIG. 4 is a schematic view of a flat tube semi-elliptical slot of a microchannel heat sink of the present utility model inserted into the manifold;

FIG. 5 is a schematic view of a flat tube of a microchannel heat sink of the present utility model;

FIG. 6 is a top plan view of a flat tube of the microchannel heat sink of the present utility model;

FIG. 7 is an overall right side view of the microchannel heat sink of the present utility model;

FIG. 8 is a cross-sectional view taken at A-A in FIG. 5;

fig. 9 is a schematic diagram of a header of a microchannel heat sink of the utility model.

In the figure: 1. an inlet and outlet pipe; 2. collecting pipes; 21. a flat tube groove; 211. a notch; 212. an inner flanging; 22. an end cap; 3. a connecting block; 4. a flat tube; 41. grooving; 42. a microchannel; 5. a side plate; 6. and (3) a fin.

Detailed Description

The following are specific embodiments of the present utility model and the technical solutions of the present utility model will be further described with reference to the accompanying drawings, but the present utility model is not limited to these embodiments.

1-9, this microchannel radiator, including flat pipe 4, collecting pipe 2, import and export pipe 1, flat pipe 4 both ends are pegged graft on collecting pipe 2, collecting pipe 2 intermediate position fixedly connected with import and export pipe 1, flat pipe 4 tip is equipped with grooving 41, grooving 41 shape includes half ellipse, equidistant and in line are equipped with a plurality of flat pipe grooves 21 on the collecting pipe 2, flat pipe groove 21 includes notch 211 and inward flange 212, inward flange 212 is a part of integrative on collecting pipe 2, and be located collecting pipe 2 inside, the lowest position of grooving 41 is higher than inward flange 212 flat pipe 4 and pegs graft in notch 211 department and insert collecting pipe 2 inside, flat pipe 4 both sides at extreme edge are provided with solid sideboard 5, sideboard 5 both ends fixed connection is in collecting pipe 2 outside.

Further, be equipped with straight equidistant flat pipe 4 hole on this microchannel radiator's the pressure manifold 2, flat pipe 4 has been pegged graft in the flat pipe 4 hole, flat pipe 4 pegged graft to pressure manifold 2 is inside and have a part outstanding, flat pipe 4 peg graft and to be enough to accomplish the welding well in the outstanding part length of pressure manifold 2, the sideboard 5 that flat pipe 4 outer fringe both sides set up can play certain guard action to inside flat pipe 4, simultaneously also can strengthen the holistic intensity of structure, but simultaneously, can exist the recess between the inside flat pipe 4 of pressure manifold 2, the refrigerant liquid exists the gas-liquid two-phase state in upper and lower two pressure manifold 2, the recess department easily produces the difficult gas of flowing, the liquid refrigerant liquid of liquid, so flat pipe 4 is outstanding at pressure manifold 2 inside part inadvantaged, overlength only can be excessively increased easily the hydrops, the region of hydrops, influence the heat dispersion, in order to realize as far as possible, the region of hydrops, we have adopted the scheme that inserts the interior part of pressure manifold 2 to flat pipe 4 end and set up grooving 41, but produce the effect is more obvious, 41 can have various shapes, the grooving is half the elliptic shape, as far as possible, the area is enough can be reached to the welding region is small as far as possible.

In addition, the inlet and outlet pipes 1 are communicated with the collecting pipe 2 through connecting blocks 3, end covers 22 are arranged at two ends of the collecting pipe 2 in a sealing manner, all parts are welded into a whole through a brazing process after being assembled, a part to be brazed comprises a flat pipe 4 and the collecting pipe 2, fins 6 are arranged between adjacent flat pipes 4, a plurality of micro-channels 42 are arranged in the flat pipe 4 in parallel, and openings at two ends of the micro-channels 42 are respectively positioned at two ends of the flat pipe 4.

Specifically, on the connection position relation, two collecting pipes 2 are arranged in parallel, flat pipes 4 are inserted in the collecting pipes 2 in parallel at equal intervals, a connecting block 3 is further arranged on the collecting pipes 2, and an inlet pipe 1 is connected to the connecting block 3 to realize communication with the collecting pipes 2; fins 6 are further arranged between the adjacent flat tubes 4, and the fins 6 play a role in supporting and separating the flat tubes 4 on one hand and preventing the flat tubes 4 from being broken due to overlarge transverse stress on the other hand, and play a role in helping heat dissipation; in addition, end caps 22 are arranged at both ends of the collecting pipe 2 in a sealing manner; and the collecting pipe 2 and the flat pipe 4 are welded and fixed by adopting a brazing process, and the sealing is stable and firm.

The flow process of the refrigerating liquid comprises the following steps: the heat dissipation device flows in from an inlet pipe of the inlet and outlet pipe 1, flows to the collecting pipe 2 through the connecting block 3, the collecting pipe 2 is shunted to each flat pipe 4, the flat pipes 4 realize heat dissipation under the assistance of the fins 6, then flow into the other collecting pipe 2, and flows out from an outlet pipe of the inlet and outlet pipe 1 through the connecting block 3.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.

Claims

1. The utility model provides a microchannel radiator, includes flat pipe (4), collecting main (2), import and export pipe (1), flat pipe (4) parallel peg graft in on collecting main (2), collecting main (2) intermediate position fixedly connected with import and export pipe (1), its characterized in that, flat pipe (4) tip is equipped with grooving (41).

2. A microchannel heat sink according to claim 1, wherein the slot (41) shape comprises a semi-elliptical shape.

3. A microchannel heat sink according to claim 1, wherein the header (2) is provided with a plurality of flat tube grooves (21) equidistant and in line, the flat tube grooves (21) comprising notches (211) and inner rims (212), the inner rims (212) being an integral part of the header (2) and being located inside the header (2).

4. A microchannel heat sink according to claim 3, wherein the flat tube (4) is inserted into the header (2) at the slot (211), and solid side plates (5) are disposed on two sides of the edge of the flat tube (4), and two ends of the side plates (5) are fixedly connected to the outer side of the header (2).

5. A microchannel heat sink according to claim 4, wherein the lowest position of the slot (41) is higher than the inner turn (212).

6. A microchannel heat sink according to claim 5, wherein the inlet and outlet pipe (1) is in communication with the header (2) via a connection block (3).

7. A microchannel heat sink according to claim 1 or 2 or 3 or 4 or 5 or 6, characterized in that the header (2) is provided with end caps (22) at both ends in a sealing manner.

8. A microchannel heat sink according to claim 7, wherein the parts are assembled and welded together by a brazing process, the part to be brazed comprising the fixation between the flat tube (4) and the header (2).

9. A microchannel heat sink according to claim 8, wherein fins (6) are provided between adjacent ones of the flat tubes (4).

10. The microchannel heat sink according to claim 9, wherein a plurality of microchannels (42) are provided in parallel in the flat tube (4), and openings at both ends of the microchannels (42) are located at both ends of the flat tube (4).