JPS611994A - Manufacture of flat heat exchanger pipe - Google Patents

Abstract

PURPOSE:To contrive molding of plural number of pipes at the same time by making possible to handle them as if one flat heat exchange pipe, by a method wherein plural number of flat heat exchange pipes are molded connectedly by providing a connecting part which is able to separate each flat heat exchange pipe. CONSTITUTION:Plural number of hollow flat heat exchange pipes 10, of which inner parts are divided to plural number of passages 12 with partition walls, are molded connectedly providing connecting parts 13 which are possible to separate in the width direction. In this case, the width of the heat exchange pipe is set to the smallest width while using, and necessary numbers of the connected pipes may be molded connectedly according to the largest width. Necessary flat heat exchange pipes can be obtained by separating from connecting parts 13 to the necessary width according to the usage.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for manufacturing flat heat exchange tubes that can be used in various heat exchangers.

(Prior art) Figure 4 shows a heat exchanger using conventional flat heat exchange tubes, and
The figure shows the flat heat exchange tube.

Usually, the thickness T of the flat heat exchange tube 2 is approximately constant, whereas the width W varies depending on the installation space of the heat exchanger, the required amount of heat exchange, etc.

Note that 1 is a fin and 3 is a union.

(Problems to be Solved by the Invention) It is necessary to prepare molds for forming flat heat exchange tubes for each flat heat exchange tube having a different width W.

The weight of the strike is large, and the mold cost is also large.

In addition, for flat heat exchange tubes with a small width W, a method of simultaneously molding multiple tubes is adopted to increase productivity, but due to waviness and deformation of the flat heat exchange tubes immediately after molding, it is difficult to mold multiple tubes at the same time. There was a limit to the number of flat heat exchange tubes that could be molded at the same time in terms of cost balance, such as the flat heat exchange tubes becoming entangled with each other and the need for manpower to prevent this.

(Measures to solve the problem) In order to improve the setup when forming flat heat exchange tubes and to mold multiple tubes at the same time, and to increase productivity, we decided to make multiple flat heat exchange tubes with the minimum width in the width direction. By providing a connection part that can be separated and molding them together, it is possible to handle them as if they were a single flat heat exchange tube, allowing for simultaneous molding of multiple tubes. By using them without separation, it is possible to share the forming equipment for flat heat exchange tubes with a minimum width to a wide width.

(Example) Fig. 1 shows an example in which a plurality of hollow flat heat exchange tubes 10 whose interior is partitioned into a plurality of passages 12 by a partition wall 11 are connected by providing a connecting portion 13 that can be separated in the width direction. Shape. At this time, the width of the heat exchange tube 10 should be set to the minimum width during use, and the number of connected tubes should be formed to match the maximum width.Then, the width of the heat exchange tube 10 should be set to the maximum width. This makes it possible to obtain the required flat heat exchange tube.

Note that the connecting portion 13 may have any size and structure as long as it provides the minimum necessary strength required for connection and is separable.

In addition, in the example of two heat exchange tubes 10, an example was explained in which three water speeds were formed, but it is also possible to use four or more tubes.
There is no need to separate each book.

It can be separated into various numbers.

Figure 2 shows the state in which the flat heat exchange tubes 10 are connected.

An embodiment will be shown in which fins 14 are joined to the flat heat exchange tube lO and used as a condenser. In this case, the connecting portion 13 forms a condensate passage 15 and effectively functions to discharge the condensate.

Further, FIG. 3 shows a plan view of the flat heat exchange tube, showing the uncut portion 16 of the connecting portion 13. This uncut portion 16 is
The anti-corrosion coating formed on the surface of the heat exchange tube effectively protects the end surfaces of the flat tubes, which are particularly susceptible to damage due to external injuries.

Note that the uncut portion 16 may be completely removed depending on the purpose.

(Effects of the invention) As described above, by connecting and molding a plurality of flat heat exchange tubes by providing a connection part that can separate each flat heat exchange tube,
It is possible to improve the setup and productivity during molding, and the connection part improves the drainage of condensate, etc., and the uncut part of the connection part effectively protects the anticorrosion coating.

It is also possible to improve quality.

[Brief explanation of drawings]

FIGS. 1(a) and 1(b) show one embodiment of the present invention, in which (a) is a perspective view showing the state during molding;
2 is a partial perspective view showing an example of a heat exchanger using the flat heat exchange tube manufactured according to the present invention, and FIG. 3 is a perspective view showing the flat heat exchange tube separated from the connecting part. FIG. 4 is a front view of a heat exchanger using a conventional flat heat exchange tube, and FIG. 5 is a partial perspective view of the same flat heat exchange tube. 10: Flat heat exchange tube, 13: Connection part. cheers

Claims (1)

[Claims] A plurality of hollow flat heat exchange tubes are provided with a connecting part that can be separated in the width direction, and a plurality of them are connected and molded, and then the required flat heat exchange tubes are manufactured by separating them from the connecting part without separating them or into the necessary width according to the application. A method for manufacturing a flat heat exchange tube, characterized in that: