JPH04115257U - Heat exchanger - Google Patents

Abstract

(57) [Summary] [Purpose] To improve the space efficiency and heat exchange efficiency of a heat exchanger. [Structure] A plurality of generally U-shaped refrigerant passages 10 each having a generally U-shape formed by connecting two straight tubes to a straight pipe closed at both ends so as to communicate with each other are arranged so as to be approximately parallel to each other. Radiation fins 20 are provided between the refrigerant passages 10 or between each refrigerant passage 10 and on the outside of the refrigerant passage 10 at both ends, and one header pipe 30 and another header pipe 40 are provided at one opening and the other opening of each refrigerant passage 10, respectively. By arranging the parts 3 in communication with each other, the part 3 of one header pipe 30
The refrigerant supplied to 0A is supplied to each refrigerant passage 10 in parallel, cools it together with the radiation fins 20, and is discharged from the section 30B of the header pipe 30 via the other header pipe 40.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a heat exchanger used in car air conditioners and the like.

0002

[Conventional technology]

Figure 2 shows an example of a conventional heat exchanger of this type, which is formed in a serpentine shape. A radiation fin 2 is provided between each passage of the refrigerant passage 1, and both ends of the refrigerant passage 1 are Header pipes 3 and 4 are attached to the section (for example, Utility Model No. 62-6359). (See Publication No. 5). The refrigerant passage 1 is connected from either one of the header pipes 3 and 4 to the other. A depressurized refrigerant is supplied from an expansion valve or capillary tube (not shown) toward the be done. At this time, the refrigerant passage 1 and the radiation fins 2 are cooled by the latent heat of vaporization of the refrigerant. The air passing between the refrigerant passage 1 and the radiation fins 2 is cooled.

0003

[Problem that the idea aims to solve]

However, in the heat exchanger, the bent portion 1a of the refrigerant passage 1 is vertically or horizontally It is necessary for both, and the dead space increases accordingly, and the bent portion 1a The disadvantage is that condensed water tends to accumulate when placed one above the other, and this water scatters. there were. Furthermore, since there is a limit to reducing the radius of the bent portion 1a, the refrigerant It is also possible to improve the heat exchange efficiency by reducing the interval between the passages 1, that is, the width of the radiation fins 2. There was a limit. In addition, the heat exchange efficiency on the discharge side is lower than that on the refrigerant supply side, and the The disadvantage is that the temperature distribution of the air becomes uneven.

0004 In view of the above problems, this invention has excellent space efficiency and heat exchange efficiency, and distributes air unevenly. To provide a heat exchanger that can be cooled without any problems and has good drainage performance.

[0005]

[Means to solve the problem]

In this invention, in order to achieve the above-mentioned purpose, the side of a straight pipe with both ends closed. One end of each of two straight tubes is connected so that they communicate with each other. A U-shaped refrigerant passage is configured, and a plurality of said refrigerant passages are arranged from one opening to another opening. The planes passing through the axes up to are substantially parallel to each other, and each one opening and the other opening are Arranged so that each Radiation fins are provided between the refrigerant passages or between each refrigerant passage and on the outside of the refrigerant passage at both ends. Connect one opening and the other opening of each refrigerant passage on the first straight line and the other straight line, respectively. We propose a heat exchanger in which one header pipe and another header pipe are arranged.

[0006]

[Effect]

According to the present invention, the refrigerant supplied to one header pipe is is supplied to each refrigerant passage in parallel through the is discharged from the other header pipe through the opening.

[0007]

【Example】

FIG. 1 shows an embodiment of the heat exchanger of the present invention, in which 10 is a refrigerant passage; 0 is a heat radiation fin, and 30 and 40 are header pipes.

[0008] As shown in FIGS. 3(a) and 3(b), the refrigerant passage 10 connects both ends of a straight pipe 11, respectively. The pipe 11 is closed with a cap 12, and two flat linear chips are provided on the side surface of the pipe 11. One end of each of the tubes 13 and 14 is connected so as to communicate with each other, so that the whole is approximately U-shaped. It is composed of shapes. There are a plurality of refrigerant passages 10, one opening of which leads to the other. The planes passing through the axes up to the openings are approximately parallel to each other, and each opening and the other opening are parallel to each other. The mouth is arranged so that it is approximately located on one straight line and on another straight line that is approximately parallel to the one straight line. It is.

[0009] The radiation fins 20 are installed between the respective refrigerant passages 10 and outside the refrigerant passages 10 at both ends. I'm being kicked. Further, side plates 51 and 5 are provided on the outside of the radiation fins 20 at both ends. 2 is installed.

0010 The header pipes 30 and 40 cover both ends of the straight pipes 31 and 41, respectively. The caps 32 and 42 close one part of each refrigerant passage 10, respectively. The opening and the other opening are arranged on one straight line and on the other straight line, and each one and other openings. Also, the header pipe 30 is located near the center. It is divided into two parts 30A and 30B by a partition plate 33, and each part 3 Pipes 53 and 54 are connected to 0A and 30B, respectively.

[0011] In the above configuration, the cooling is depressurized by an expansion valve or capillary tube (not shown). The medium is supplied to the section 30A of the header pipe 30 via the pipe 53 as shown in FIG. (a) and is supplied to the refrigerant passage 10 communicating with the portion 30A (b), and is released. It is cooled together with the heat fins 20. After that, the refrigerant remains through the header pipe 40. The refrigerant is supplied to the refrigerant passage 10 (c, d), and is cooled together with the radiation fins 20. Ru. Thereafter, the refrigerant passes through the section 30B of the header pipe 30 and passes through the pipe 54. The air is then sent to a compressor (not shown) (e).

0012 According to the embodiment, the refrigerant passage 10 has no bent parts, so there is no dead space. There is no risk of water accumulating. Also, there is a bent part between each refrigerant passage 10. Since the spacing can be set freely, the width of the radiation fins 20 can be reduced to improve heat exchange. Conversion efficiency can be improved. Moreover, the refrigerant is connected in parallel to each refrigerant passage 10. Since the air is supplied to the air, the temperature distribution of the air passing through it can be made almost uniform.

[0013] In addition, in the above embodiment, one header pipe has a pipe for supplying and discharging refrigerant. The two pipes were installed in order to concentrate the piping for the heat exchanger on one side. However, they may be attached to separate header pipes.

[0014]

[Effect of the idea]

As explained above, according to the present invention, the refrigerant passage has no bent parts, so there is no space. The water factor can be improved, and there is no risk of water accumulation and drainage is good. Also , there are no bent parts between each refrigerant passage, and the interval can be set freely, so the heat dissipation Heat exchange efficiency can be improved by reducing the width of the fin. In addition, each refrigerant passage Since refrigerant can be supplied in parallel to the air, the temperature distribution of the air passing through it is almost uniform There are advantages such as being able to

[Brief explanation of drawings]

[Fig. 1] A perspective view showing an embodiment of the heat exchanger of the present invention.

[Figure 2] A perspective view showing an example of a conventional heat exchanger

[Figure 3] Explanatory diagram showing the detailed configuration of the refrigerant passage

[Figure 4] Explanatory diagram showing the flow of refrigerant

[Explanation of symbols]

10... Refrigerant passage, 11... Pipe, 13, 14... Tube, 20... Radiation fin, 30, 40... Header pipe.

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[Procedural amendment]

[Submission date] April 24, 1992

[Procedural amendment 1]

[Name of document to be corrected] Drawing

[Correction target item name] Figure 1

[Correction method] Change

[Correction details]

[Figure 1]

[Procedural amendment 2]

[Name of document to be corrected] Drawing

[Correction target item name] Figure 4

[Correction method] Change

[Correction details]

[Figure 4]

Claims (1)

[Scope of utility model registration request] 1. One end of each of two straight tubes is connected to the side surface of a straight pipe with both ends closed so as to communicate with each other to form a refrigerant passage having an overall substantially U-shape, and the refrigerant passage is A plurality of apertures, the planes passing through the axis from one opening to the other opening are substantially parallel to each other, and each one opening and the other opening are on one straight line and on another straight line substantially parallel to the one straight line. radiating fins are provided between each refrigerant passage or between each refrigerant passage and on the outside of the refrigerant passage at both ends, and one opening of each refrigerant passage and the other are provided on the one straight line and the other straight line. A heat exchanger characterized in that one header pipe and another header pipe are arranged, each communicating with an opening of the heat exchanger.