CN212431896U

CN212431896U - Dual-system micro-channel collecting pipe

Info

Publication number: CN212431896U
Application number: CN201921497957.6U
Authority: CN
Inventors: 赵永峰; 薛炎
Original assignee: Jiangsu Keling Precision Technology Co ltd
Current assignee: Jiangsu Keling Precision Technology Co ltd
Priority date: 2019-09-10
Filing date: 2019-09-10
Publication date: 2021-01-29
Anticipated expiration: 2029-09-10

Abstract

The utility model relates to the technical field of micro-channel heat exchangers, in particular to a double-system micro-channel header, which comprises a core body part, a first communication part and a second communication part, wherein the first communication part belongs to a first system, and the second communication part belongs to a second system; the flat tube interfaces comprise a first system flat tube interface and a second system flat tube interface, and the first system flat tube interface and the second system flat tube interface are communicated with the channel; one part of the channel is communicated with the first communicating part, and the other part of the channel is communicated with the second communicating part; the first communicating part and the second communicating part are respectively connected with a plurality of first connecting pipes and second connecting pipes. After the structure and the method are adopted, the utility model discloses for the microchannel collection flow tube that current crossing flat tube arranged, inside volume has been little, has further reduced the filling volume of refrigerant, about 30%, is favorable to the safety of environmental protection and system.

Description

Dual-system micro-channel collecting pipe

Technical Field

The utility model relates to a microchannel heat exchanger technical field, especially a dual system microchannel collector.

Background

The micro-channel heat exchanger adopts flat tubes, the hydraulic diameter of an internal channel is small, the boundary layer is small, the heat transfer coefficient in the tubes is high, the air advancing direction speed is uniform, the heat exchange coefficient of air on the fin side is high, and the welding mode is adopted without thermal resistance of expansion joint; due to the characteristics, the micro-channel heat exchanger is often used in occasions of improving energy efficiency, reducing weight, having a compact structure and reducing the filling amount of refrigerant, and is the development direction of the air side heat exchanger. The existing micro-channel heat exchanger comprises a collecting pipe, an inlet pipe, an outlet pipe and fins, wherein the collecting pipe is in a circular pipe shape, the diameter of the collecting pipe is 3-5 mm larger than the width of a flat pipe, the inner volume of the collecting pipe is large, in addition, the collecting pipe is separated by the inserted flat pipe by about half of circulation space, the flowing resistance of a refrigerant is increased, and the effective channel of the collecting pipe is reduced. In the product design, in order to improve partial energy efficiency of the product, double systems are adopted, and only one system is adopted during partial load; as a micro-channel heat exchanger, the heat exchanger is generally set to be of a left-right structure or a top-bottom structure, when the heat exchanger is used, half of the area of the heat exchanger fins is not used, and some products adopt a mode of arranging heat exchange flat pipes in a crossed mode, so that the difficulty is high and the cost is high.

Chinese utility model patent CN 208505067U discloses a convection double-system microchannel heat exchanger, which comprises four collecting pipes and a plurality of flat pipe groups; every flat tub of group all include a second flat pipe and two and laminate respectively the first flat pipe on the outer surface about the flat pipe of second, the both ends of first flat pipe communicate with pressure manifold three and pressure manifold four respectively, the one end of the flat pipe of second runs through pressure manifold three and communicates with flow manifold one, the flat tub of other end of second runs through pressure manifold four and communicates with pressure manifold two.

Disclosure of Invention

The utility model discloses the technical problem that needs to solve provides a two system microchannel collector that has effectively reduced the volume of filling of refrigerant and has improved load heat transfer coefficient.

In order to solve the technical problem, the utility model discloses a dual-system microchannel header, including core body portion, first intercommunication portion, second intercommunication portion, the first intercommunication portion belongs to the first system, the second intercommunication portion belongs to the second system; flat tube interfaces and channels are uniformly distributed on the core body part, the flat tube interfaces are used for butting flat tubes, wherein,

the flat pipe interface comprises a first system flat pipe interface and a second system flat pipe interface, and the first system flat pipe interface and the second system flat pipe interface are communicated with the channel;

one part of the channel is communicated with the first communicating part, and the other part of the channel is communicated with the second communicating part;

the first communicating part and the second communicating part are respectively connected with a plurality of first connecting pipes and second connecting pipes.

Preferably, the odd-numbered part of the passage communicates with the first communication portion, and the even-numbered part communicates with the second communication portion.

Preferably, the first communicating part and the second communicating part are the same in structure and comprise end plates and arc plates, the end plates and the arc plates are welded to form communicating channels with semicircular sections, and through holes communicated with the communicating channels are formed in the end plates.

Preferably, a partition plate for dividing the flow path is arranged in the middle of the first communication part and/or the second communication part.

Preferably, the cross-sectional area of the channel is 1.5-3.5 times of that of the flat pipe connector.

Preferably, the cross-sectional area of the channel is 2 times of that of the flat pipe joint.

Preferably, the channel is circular or rectangular in cross-section.

Preferably, the cross-section of the channel is rectangular.

After the structure of the oil-gas separator is adopted, the utility model discloses for the microchannel collecting tube that current crossing flat tube arranged, inside volume has been little, has further reduced the volume of filling of refrigerant, about 30%, is favorable to the safety of environmental protection and system. By adopting the design, the cost is reduced, and the heat exchange coefficient of partial load is further improved.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Fig. 1 is a schematic structural view of a dual system microchannel header of the present invention.

Fig. 2 is a side view of the core body of the present invention.

Fig. 3 is a schematic structural diagram of the first communicating portion of the present invention.

Fig. 4 is a schematic view of the novel mandrel body processing profile of the present invention.

Fig. 5 is a side view of the first communicating portion of the present invention.

Fig. 6 is a schematic structural view of the second communicating portion of the present invention.

Fig. 7 is a side view of a second communication portion of the present invention.

In the figure: 1 is core portion, 2 is first UNICOM's portion, 3 is second UNICOM's portion, 4 is first takeover, 5 is that the second is taken over, 1A is the extruded article, 11 is flat pipe connector, 12 is the passageway, 11A is flat pipe connector of first system, 11B is flat pipe connector of second system, 21 is first baffle, 22A is first through-hole, 32A is the second through-hole, 22 is first end plate, 23 is first circular arc board, 31 is the second baffle, 32 is the second end plate, 33 is the second circular arc board.

Detailed Description

As shown in fig. 1 and 2, a dual system microchannel header of the present invention comprises a core portion 1, a first communicating portion 2, and a second communicating portion 3, wherein the first communicating portion 2 belongs to a first system, and the second communicating portion 3 belongs to a second system; the flat tube connector and the channel 12 are uniformly distributed on the core part 1, and the flat tube connector is used for butting a flat tube. One part of the channel 12 communicates with the first communication part 3 and the other part communicates with the second communication part 3; in the present embodiment, the odd-numbered passages of the passages 12 communicate with the first communicating portion 2, and the even-numbered passages communicate with the second communicating portion 3.

As shown in fig. 1, the first communicating portion 2 is disposed on the left side of the core portion 1, the second communicating portion 3 is disposed on the right side of the core portion 1, the first communicating portion 2 and the second communicating portion 3 are respectively connected with a plurality of first connecting pipes 4 and second connecting pipes 5, and in this embodiment, the number of the first connecting pipes 4 and the second connecting pipes 5 is plural.

As shown in fig. 4, core portion 1 is formed by extrusion 1A flat pipe interface that punches a hole, flat pipe interface includes first system flat pipe interface 11A and second system flat pipe interface 11B, extrusion 1A has included passageway 12, and first system flat pipe interface 11A and second system flat pipe interface 11B communicate with each other with passageway 12. The cross-sectional area of the channel 12 is 1.5 to 3.5 times, preferably 2.5 times in the present embodiment, the area of the flat tube connector 11. The cross-section of the channel 12 in this embodiment is circular, but may be rectangular, and if the cross-section is rectangular, a rectangular shape is preferred.

As shown in fig. 3 and 5, the first communicating portion 2 includes a first end plate 22 and a first arc plate 23, the first end plate 22 and the first arc plate 23 are welded to form a communicating channel with a semicircular cross section, and the first end plate 22 is provided with a first through hole 22A communicated with the communicating channel. As shown in fig. 6 and 7, the second communicating portion 3 includes a second end plate 32 and a second circular arc plate 33, the second end plate 32 and the second circular arc plate 33 are welded to form a communicating channel with a semicircular cross section, and a second through hole 32A communicated with the communicating channel is formed in the second end plate 32. For dividing the flow path, a partition plate for dividing the flow path is arranged in the middle of the first communication part 2 and/or the second communication part 3, a first partition plate 21 is arranged on the first communication part 2, and a second partition plate 31 is arranged on the second communication part 3.

The utility model relates to a use method of a double-system micro-channel header, which comprises that a first system refrigerant flows among a first connecting pipe 4, a first communication part 2, a channel 12 and a first system and exchanges heat; the second system refrigerant flows and exchanges heat between the second nipple 5, the second communication part 3, the passage 12, and the second system. The two heat exchange modes are as follows:

the first implementation mode comprises the following steps:

a first system refrigerant flows in from a first connecting pipe 4 and enters a first communication part 2, flows in a communication channel of the first communication part 2, enters a channel 12 through a first through hole 22A, enters a corresponding first system flat pipe interface 11A, enters a first system heat exchange flat pipe, and exchanges heat; the second system refrigerant flows in from the second connecting pipe 5 and enters the second communicating part 3, flows in a communicating channel of the second communicating part 3, enters the channel 12 through the through hole 33A, enters the corresponding second system flat pipe interface 11B, enters the second system heat exchange flat pipe, and exchanges heat.

The second embodiment:

the first system refrigerant flows out of the flat pipe, passes through a first system flat pipe connector 11A, enters the channel 12, passes through a first through hole 22A, enters the first communicating part 2 together, and flows out of the first connecting pipe 4; the second system refrigerant flows out of the flat pipe, passes through the second system flat pipe connector 11B, enters the channel 12, passes through the second through hole 32A, enters the second communicating part 3 together, and flows out of the second connecting pipe 5.

Although specific embodiments of the present invention have been described above, it will be appreciated by those skilled in the art that these are merely examples and that many changes and modifications may be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims.

Claims

1. A dual system microchannel header, comprising: the device comprises a core part (1), a first communication part (2) and a second communication part (3), wherein the first communication part (2) belongs to a first system, and the second communication part (3) belongs to a second system; flat pipe interfaces (11) and channels (12) which are uniformly distributed on the core part (1), wherein the flat pipe interfaces (11) are used for butting flat pipes,

the flat pipe interface (11) comprises a first system flat pipe interface (11A) and a second system flat pipe interface (11B), and the first system flat pipe interface (11A) and the second system flat pipe interface (11B) are communicated with the channel (12);

one part of the channel (12) is communicated with the first communicating part (2), and the other part is communicated with the second communicating part (3);

the first communicating part (2) and the second communicating part (3) are respectively connected with a plurality of first connecting pipes (4) and second connecting pipes (5).

2. A dual system microchannel header as set forth in claim 1 wherein: the odd-numbered part of the channel (12) communicates with the first communication part (2) and the even-numbered part communicates with the second communication part (3).

3. A dual system microchannel header as set forth in claim 1 wherein: first UNICOM portion (2) and second UNICOM portion (3) structure are the same, including end plate and circular arc board, end plate and circular arc board welding form the cross-section and be the communicating passageway of semicircular UNICOM, it has the communicating through-hole with the passageway of UNICOM to open on the end plate.

4. A dual system microchannel header as set forth in claim 1 wherein: and a partition plate for dividing the flow is arranged in the middle of the first communication part (2) and/or the second communication part (3).

5. A dual system microchannel header as set forth in claim 1 wherein: the cross-sectional area of the channel (12) is 1.5-3.5 times of that of the flat pipe connector (11).

6. A dual system microchannel header as set forth in claim 5 wherein: the cross-sectional area of the channel (12) is 2 times of that of the flat pipe connector (11).

7. A dual system microchannel header as set forth in claim 1 wherein: the cross section of the channel (12) is circular or rectangular.

8. A dual system microchannel header as set forth in claim 1 wherein: the cross section of the channel (12) is rectangular.