CN209978438U

CN209978438U - Coil pipe micro-channel evaporator

Info

Publication number: CN209978438U
Application number: CN201920774622.8U
Authority: CN
Inventors: 吕海龙; 虞永亮; 王德胜; 张鑫源; 边怡顶; 郭铭; 赵延洋; 赵海涛; 郦锦韬; 方辉; 包锡江
Original assignee: ZHEJIANG SUNCO HEAT EXCHANGE SYSTEM CO Ltd
Current assignee: ZHEJIANG SUNCO HEAT EXCHANGE SYSTEM CO Ltd
Priority date: 2019-05-28
Filing date: 2019-05-28
Publication date: 2020-01-21
Anticipated expiration: 2029-05-28

Abstract

The utility model discloses a coiled pipe microchannel evaporator. The two ends of each flat pipe are communicated with a first collecting pipe and a second collecting pipe respectively, the fins are brazed between the two adjacent flat pipes, the upper side plate and the lower side plate are arranged on the upper outer side and the lower outer side of the fins and are attached to the two collecting pipes, the first end cover and the second end cover are welded to the rear end portions of the first collecting pipe and the second collecting pipe respectively, the first external connecting pipe is welded to the first collecting pipe, and the second external connecting pipe is welded to the second collecting pipe. The utility model is suitable for a microchannel product structure provides a new thinking for the microchannel evaporator.

Description

Coil pipe micro-channel evaporator

Technical Field

The utility model relates to a coiled pipe microchannel evaporator, which is applicable to evaporators in heat exchangers.

Background

The micro-channel parallel flow evaporator has small volume, light weight and compact structure. The refrigerators flow in parallel channels, and it is widely believed that the imbalance of flow distribution in each channel is a main factor affecting the performance of the evaporator. Pacio et al studied parallel flow evaporators using numerical methods, and believe that imbalanced flow distribution can seriously affect the heat exchange performance of the evaporators.

The distribution of gas-liquid two phases (especially liquid phase) in the parallel flow evaporator among the flat tubes has a great influence on the heat transfer performance, and the heat transfer performance is obviously reduced if the gas-liquid distribution among the flat tubes is uneven. The branched pipe liquid flow distribution condition of the parallel flow evaporator of 6 different forms is studied in experiments under different gas-liquid flow rates, and the flow pattern is mainly annular flow in the experiments. It was found that the distribution of the liquid flow rate in each branch pipe cannot be improved by increasing the pipe diameter for both the vertical downward flow and the vertical upward flow, and the position of the gas-liquid inlet in the main pipe has a large influence on the uniformity of the flow rate distribution.

Disclosure of Invention

The utility model aims at perfecting the defects of the prior art and providing a coiled pipe micro-channel evaporator.

A coiled pipe microchannel evaporator comprises a coiled flat pipe, fins, an upper edge plate, a lower edge plate, a first collecting pipe, a second collecting pipe, a first end cover, a second end cover, a first external connecting pipe and a second external connecting pipe;

the snakelike flat tube consists of a bent tube section and a plurality of straight tube sections which are arranged in parallel; the bent pipe section is positioned at one side of two adjacent straight pipe sections and is communicated with the two adjacent straight pipe sections; openings at two ends of the snakelike flat pipe are positioned on the same side, the openings at the two ends are respectively communicated with the first collecting pipe and the second collecting pipe, and fins are arranged between adjacent straight pipe sections of the snakelike flat pipe;

the upper side plate and the lower side plate are arranged outside the upper boundary and the lower boundary of the snake-shaped flat tube, and fins are arranged between the upper side plate and the straight tube section at the top of the snake-shaped flat tube; fins are arranged between the lower side plate and the straight pipe section at the lowest part of the snakelike flat pipe; one end of the upper side plate is welded on the first collecting pipe, and one end of the lower side plate is welded on the second collecting pipe;

the first end cover and the second end cover are respectively welded on the end surfaces of the first collecting pipe and the second collecting pipe, the first external connecting pipe is coaxially communicated with the first collecting pipe, and the second external connecting pipe is coaxially communicated with the second collecting pipe;

end necking is arranged at openings at two ends of the snakelike flat tube; flat pipe grooves for connecting the end parts of the flat pipes with necking are formed in the pipe walls of the first collecting pipe and the second collecting pipe; the slotting direction of the flat tube groove is parallel to the axial direction of the first collecting tube and the second collecting tube.

Furthermore, the width dimension of the fin is 1-10mm smaller than that of the flat tube.

Furthermore, there is the R face to bend upper edge plate and lower edge plate and collector pipe welded one end, the diameter of buckling equals the external diameter of collector pipe, with collector pipe one and collector pipe two locking after the assembly.

Furthermore, the length of the flat tube groove is smaller than the width of the flat tube.

Use the utility model discloses, it is external with external pipe two adoption copper pipes, make things convenient for the customer to install and use, the product uses single flat pipe, but make its flow average distribution, improve heat exchange efficiency, adopt full aluminum material lightweight design, the weight of evaporimeter has been alleviateed, material cost is reduced, the thickness of evaporimeter has been reduced in the use of flat pipe simultaneously, this product simple structure, processing is convenient, not high to workman's technical level, production and management cost to the enterprise has had better control.

Drawings

FIG. 1 is a schematic view of a coiled tube microchannel evaporator according to the present invention;

FIG. 2 is a left side view of FIG. 1;

FIG. 3 is a schematic view of a manifold of a serpentine microchannel evaporator of the present invention;

fig. 4 is a schematic diagram of the upper plate and the lower plate of the serpentine tube microchannel evaporator according to the present invention.

In the figure, a micro-channel flat tube 1, fins 2, an upper edge plate 3, a lower edge plate 4, a first collecting tube 5, a second collecting tube 6, a first end cover 7, a second end cover 8, a first external connecting tube 9 and a second external connecting tube 10.

Detailed Description

As shown in fig. 1-3, a serpentine tube microchannel evaporator comprises a serpentine flat tube 1, fins 2, an upper side plate 3, a lower side plate 4, a first collecting tube 5, a second collecting tube 6, a first end cover 7, a second end cover 8, a first external connection tube 9 and a second external connection tube 10;

the snakelike flat tube consists of a bent tube section and a plurality of straight tube sections which are arranged in parallel; the bent pipe section is positioned at one side of two adjacent straight pipe sections and is communicated with the two adjacent straight pipe sections; openings at two ends of the snakelike flat tubes are positioned on the same side, the openings at the two ends are respectively communicated with a first collecting pipe 5 and a second collecting pipe 6, and fins 2 are arranged between adjacent straight tube sections of the snakelike flat tubes;

the upper side plate 3 and the lower side plate 4 are arranged on the outer side of the upper boundary and the outer side of the lower boundary of the snake-shaped flat tube, and fins are arranged between the upper side plate and the uppermost straight tube section of the snake-shaped flat tube; fins are arranged between the lower side plate and the straight pipe section at the lowest part of the snakelike flat pipe; one end of the upper edge plate 5 is welded on the first bus pipe 3, and one end of the lower edge plate 6 is welded on the second bus pipe 4;

the first end cover 7 and the second end cover 8 are respectively welded on the end faces of the first collecting pipe 5 and the second collecting pipe 6, the first external connecting pipe 9 is coaxially communicated with the first collecting pipe 5, and the second external connecting pipe 10 is coaxially communicated with the second collecting pipe 6;

end necking is arranged at openings at two ends of the snakelike flat tube; flat pipe grooves for connecting end parts of the flat pipes are formed in the pipe walls of the first collecting pipe 5 and the second collecting pipe 6; the slotting direction of the flat tube grooves is parallel to the axial direction of the first collecting tube 5 and the second collecting tube 6.

In one embodiment of the present invention, the width of the fin 2 is smaller than the width of the flat tube 1 by 1-10 mm.

As shown in fig. 4, in an embodiment of the present invention, the upper and lower plates 3 and 4 have an R-face bend at one end welded to the manifold, the bending diameter is equal to the outer diameter of the manifold, and the manifold one 5 and the manifold two 6 are locked after assembly; so as to prevent the collecting pipe from falling off in the product circulation.

The utility model discloses an in one embodiment, the flat tub of groove of collector pipe one and collector pipe two be less than flat tub of width, through flat tub of tip throat, it is fixed with its degree of depth that inserts the collector pipe.

In a specific embodiment of the utility model, the whole coiled pipe microchannel evaporator only needs one coiled flat pipe; the snakelike flat pipe is made of aluminum. A single flat pipe is used in the product, so that the flow can be evenly distributed, the heat exchange efficiency is improved, the light weight design of all-aluminum materials is adopted, the weight of the evaporator is reduced, the material cost is reduced, and meanwhile, the thickness of the evaporator is reduced due to the use of the flat pipe.

Claims

1. A coiled pipe microchannel evaporator is characterized by comprising a coiled flat pipe (1), fins (2), an upper side plate (3), a lower side plate (4), a first collecting pipe (5), a second collecting pipe (6), a first end cover (7), a second end cover (8), a first external connecting pipe (9) and a second external connecting pipe (10);

the snakelike flat tube consists of a bent tube section and a plurality of straight tube sections which are arranged in parallel; the bent pipe section is positioned at one side of two adjacent straight pipe sections and is communicated with the two adjacent straight pipe sections; openings at two ends of the snakelike flat pipe are positioned on the same side, the openings at the two ends are respectively communicated with a first collecting pipe (5) and a second collecting pipe (6), and fins (2) are arranged between adjacent straight pipe sections of the snakelike flat pipe;

the upper side plate (3) and the lower side plate (4) are arranged outside the upper boundary and the lower boundary of the snake-shaped flat tube, and fins are arranged between the upper side plate and the uppermost straight tube section of the snake-shaped flat tube; fins are arranged between the lower side plate and the straight pipe section at the lowest part of the snakelike flat pipe; one end of the upper edge plate (3) is welded on the first collecting pipe (5), and one end of the lower edge plate (4) is welded on the second collecting pipe (6);

the end cover I (7) and the end cover II (8) are respectively welded on the end faces of the manifold I (5) and the manifold II (6), the external connecting pipe I (9) is coaxially communicated with the manifold I (5), and the external connecting pipe II (10) is coaxially communicated with the manifold II (6);

end necking is arranged at openings at two ends of the snakelike flat tube; flat tube grooves for connecting end parts of the snake-shaped flat tubes with necking are formed in the tube walls of the first collecting tube (5) and the second collecting tube (6); the slotting direction of the flat tube groove is parallel to the axial direction of the first collecting tube (5) and the second collecting tube (6).

2. A serpentine tube microchannel evaporator according to claim 1 wherein the width dimension of the fins (2) is 1-10mm less than the width dimension of the serpentine flat tubes (1).

3. A serpentine tube microchannel evaporator as set forth in claim 1 wherein the welded ends of the upper and lower plates (3, 4) and the manifold have R-faces bent to a diameter equal to the outer diameter of the manifold to lock the first (5) and second (6) manifolds after assembly.

4. A serpentine tube microchannel evaporator according to claim 1 wherein the length of the flat tube grooves is less than the width of the serpentine flat tubes (1).

5. A serpentine tube microchannel evaporator as set forth in claim 1 wherein said serpentine flat tubes are formed of aluminum.