JPH04335996A - Heat exchanger - Google Patents

Abstract

PURPOSE:To provide a heat exchanger in which the number of assembling steps is reduced by reducing the number of components. CONSTITUTION:Header pipes 51, 52 provided vertically in parallel with one another, and a cooling tube 53 connected at both ends to the pipes 51, 52, are provided. The pipes 51, 52 and the tube 53 are partitioned by to first and second passages A, B by central partition walls 511, 521, 531. A refrigerant inlet 55, a refrigerant outlet 56 are respectively provided at the ends of the passages A, B, and then a coupling tube 57 is connected to the rear end. The passages A, B are connected in series with one another by the pipe 57.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a parallel flow heat exchanger used in an air conditioner.

0002

2. Description of the Related Art A conventional parallel flow heat exchanger used in an air conditioner will be explained with reference to the drawings. FIG. 8 is an external perspective view of the heat exchanger, FIG. 9 is a side view thereof, and FIG. 10 is a developed plan view showing the refrigerant flow path.

The heat exchanger 1 consists of a first heat exchanger 10 and a second heat exchanger 20, which are arranged one after the other perpendicular to the ventilation direction shown by the arrow in FIG. 1st
The heat exchanger 10 includes a lower header pipe 11, an upper header pipe 12, a cooling pipe 13, and fins 14. The lower header pipe 11 and the upper header pipe 12 are arranged in parallel and are connected to each other by side members (not shown) provided on both left and right sides.

[0004] The lower header pipe 11 is open at one end,
The other end is closed, and a partition plate 111 is provided at a predetermined position between the open end and the closed end. In contrast to the lower header pipe 11, the upper header pipe 12 has one end closed and the other end open, and a partition plate 121 is provided at a predetermined position between both ends.

The cooling pipes 13 communicate orthogonally with the header pipes 11 and 12, and are arranged in large numbers at predetermined intervals over substantially the entire length of the header pipes 11 and 12 in the axial direction. The cooling pipes 13 are flattened in the direction in which they are arranged, and corrugated fins 14 are arranged between each cooling pipe 13. The second heat exchanger 20 has approximately the same structure as the first heat exchanger 10, with a lower header pipe 21 and an upper header pipe 22.
, a cooling pipe 23, and fins (not shown). Two partition plates 21 are installed at predetermined positions between both ends of the lower header pipe 21.
1 , 212 , and two partition plates 221 , 222 are provided at predetermined positions between both ends of the upper header pipe 22 . The open end of the lower header pipe 11 and the open end of the upper header pipe 22 are communicated by a connecting pipe 30.

When the refrigerant is used for cooling, the solid line R in FIG.
As shown in , it flows from the lower header pipe 21 of the second heat exchanger 20, and
2, 222 lower and upper header pipes 21,
It flows through the cooling pipe 23 while meandering through the connecting pipe 3.
0 and flows into the first heat exchanger 10. Then, it flows out from the upper header pipe 12 in the same manner as described above. Also, during heating, as shown by the broken line H, the upper header pipe 12
It flows in from the lower header pipe 21 and flows out from the lower header pipe 21.

[0007]

[Problems to be Solved by the Invention] However, in the conventional heat exchanger 1, the first heat exchanger 10 and the second heat exchanger 20, which are separate bodies, are connected by a connecting pipe 30 and integrated. There is. Therefore, the number of parts increases, and assembly requires a large number of man-hours. The present invention was devised in view of the above circumstances, and an object of the present invention is to provide a heat exchanger that reduces the number of parts and the number of assembly steps.

[0008]

[Means for Solving the Problems] A heat exchanger according to the present invention includes a header pipe provided vertically in parallel, and a large number of cooling pipes connected at both ends to the header pipe and arranged in parallel in the axial direction of the header pipe. The header pipe is divided into a first flow path and a second flow path by a central partition wall, and a refrigerant inlet is provided at the tip of the first flow path, and a refrigerant inlet is provided at the tip of the first flow path, and a
A refrigerant outlet is provided at the tip of the flow path, and a connecting pipe communicating the first and second flow paths is connected to the rear ends of the first and second flow paths, and the cooling The pipe is characterized in that a central partition wall separates first and second passages that communicate with the first and second passages of the header pipe.

[0009]

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings. Figure 1 is an external perspective view of a heat exchanger, Figure 2 is a plan development view of a header pipe with both ends cut away, and Figure 3 is an X-
Side cross-sectional view of the header pipe in the X-ray position, Figure 4
is a side sectional view of the header pipe taken along the Y-Y line in FIG. 2, FIG. 5 is a side sectional view of the header pipe taken along the Z-Z line in FIG. 2, and FIG. 7 is a partially sectional side view illustrating the connection between the header pipe and the cooling pipe.

The heat exchanger 50 according to the present invention is different from the conventional first heat exchanger 50.
The heat exchanger 10 and the second heat exchanger 20 are integrated, and include a lower header pipe 51, an upper header pipe 52, a cooling pipe 53, and fins 54. As shown in FIG. 1, the lower header pipe 51 and the upper header pipe 52 are arranged vertically in parallel, and are connected to each other by side members (not shown) provided on both left and right sides. The lower header pipe 51 is one pipe that is divided into two by a central partition wall 511 into a first flow path A and a second flow path B.
, B are both closed. A partition plate 512A is installed at a predetermined position between both ends of each channel A and B.
512B are provided respectively.

Similar to the lower header pipe 51, the upper header pipe 52 is a single pipe divided into a first flow path A and a second flow path B by a central partition wall 521. Both ends of the first and second channels A and B are open. and the first flow path A
A refrigerant inlet 55 is provided at the tip of the second channel B, and a refrigerant outlet 56 is provided at the tip of the second flow path B. Also the first
A connecting pipe 57 is provided at the rear end of the second flow path A and B.
are connected, thereby connecting the first and second channels A
, B are connected in series.

A plurality of partition plates 522A and 523 are provided at predetermined positions between both ends of the first and second flow paths A and B.
A, 522B, and 523B are provided, respectively. As shown in FIG. 2, the lower header pipe 51 has a metal plate 51A having a predetermined width and a predetermined length, and a plurality of openings 513 for attaching cooling pipes, notches 514 for attaching cooling pipes, and notches 515 and 516 for attaching partition plates. are provided at predetermined intervals in the longitudinal direction of the metal plate 51A.

[0013] The lower header pipe 51 is connected to the metal plate 51A.
It is manufactured by bending by rolling or the like so that the cross section in side view has a θ-shape. In other words, the left end L
The left end portion is bent so as to be located on the center line C of the openings 513 in the arrangement direction, thereby forming the central partition wall 511 and the first channel A. Further, the right end portion is bent to form a second flow path B. Left end L, right end R
are welded to the abutting portions of the metal plate 51A. Next, as shown in FIG. 4, the partition plate 512A is cut into a notch 515.
The partition plate 512B is fitted into the notch 516 as shown in FIG. 5, and the lower header pipe 51 is completed. The upper header pipe 52 is also manufactured in the same manner as the lower header pipe 51.

The cooling pipes 53 are made up of a large number of pipes, and as shown in FIG. It is divided. First and second flow paths A and B
is further subdivided by a plurality of partition walls to increase heat exchange efficiency. Furthermore, each cooling pipe 53
A corrugated fin 54 is arranged between them.

The cooling pipe 53 is fitted into the opening 513 of the lower header pipe 51 such that the central partition wall 531 matches the central partition wall 511 of the header pipe. Then, the lower end of the cooling pipe 53 is fitted into the notch 514 until it abuts on the notch surface 514A, and the abutting portion is welded and fixed. The method of fixing to the upper header pipe 52 is also the same. As a result, the lower header pipe 51 and the upper header pipe 52
The first and second channels A and B of the cooling pipe 53 are communicated separately.

When the refrigerant is used for cooling, the solid line H in FIG.
As shown in FIG.
While meandering along the first flow path A of the cooling pipe 53,
It flows through the flow path A. Then, through the connecting pipe 57,
U-turn and enter the second flow path B of the upper header pipe 52
and flows into the second flow path B of both header pipes 51 and 52.
The refrigerant flows through the second flow path B of the cooling pipe 53 while meandering through the refrigerant outlet 56 and flows out from the refrigerant outlet 56 . Note that the partition plate 512
A, 512B, 522A, 523A, 522B, 523
B are arranged so as not to overlap in the ventilation direction. Each of the partition plates is connected to the first and second flow paths A and B.
In the case where the partition plate mounting notch of the header pipe is provided at the same position, the notch for attaching the partition plate of the header pipe may be set to a corresponding position and shape. Further, in this embodiment, the header plate is formed by roll processing, but it is needless to say that the header plate is not limited to this and may be formed by extrusion molding and notch cutting.

[0017]

[Effects of the Invention] As explained above, the heat exchanger according to the present invention is configured such that the refrigerant flow paths of the upper header pipe, the lower header pipe, and the cooling pipe are divided into two, and each flow path is connected in series. has been done. Therefore, the first and second
Since there is no need to provide a heat exchanger, the number of parts and the number of man-hours required for assembly can be halved, resulting in significant cost reductions.

[Brief explanation of drawings]

FIG. 1 is a drawing according to the present invention, which is an external perspective view of a heat exchanger.

FIG. 2 is a drawing according to the present invention, which is a developed plan view of a header pipe with both ends cut away.

3 is a drawing according to the present invention, and is a side sectional view of the header pipe taken along the line XX in FIG. 2. FIG.

4 is a drawing according to the present invention, and is a side sectional view of the header pipe taken along line Y-Y in FIG. 2. FIG.

5 is a drawing according to the present invention, which is a side sectional view of the header pipe taken along line Z-Z in FIG. 2; FIG.

FIG. 6 is a drawing according to the present invention, which is a side sectional view of a cooling pipe.

FIG. 7 is a drawing according to the present invention, and is a partially sectional side view illustrating a connection between a header pipe and a cooling pipe.

FIG. 8 is a drawing related to the prior art, which is an external perspective view of a heat exchanger.

FIG. 9 is a drawing related to the prior art, which is a side view of FIG. 8;

FIG. 10 is a drawing related to the prior art, and is a developed plan view showing a refrigerant flow path.

[Explanation of symbols]

50 Heat exchanger 51 Lower header pipe 511 Central partition wall 512A, 512B Partition plate 52 Upper header pipe 521 Central partition wall 522A, 522B Partition plate 53 Cooling pipe 531 Central partition wall 54 Fin 55 Refrigerant inlet 56 Refrigerant outlet 57 Connecting pipe A First flow path B Second flow path

Claims (1)

[Claims] 1. A header pipe provided vertically in parallel, and a large number of cooling pipes connected at both ends to the header pipe and arranged in parallel in the axial direction of the header pipe, the header pipe having a central partition. A wall separates the first flow path and the second flow path.
A refrigerant inlet is provided at the end of the first flow path, a refrigerant outlet is provided at the end of the second flow path, and a refrigerant outlet is provided at the rear end of the first and second flow paths. is the first
and a connecting pipe that communicates with the first and second flow paths of the header pipe, and the cooling pipe has a central partition wall that connects the first and second flow paths that communicate with the first and second flow paths of the header pipe. A heat exchanger characterized by being partitioned.