JPS5974498A - Manufacture of heat exchanger - Google Patents

Abstract

PURPOSE:To enable to cope with combinations of blocks by using two kinds of side plates, namely, smaller side plates and larger side plates, by a method wherein smaller side plates are provided for each block, are fitted simultaneously with plate fins to constitute an L-shaped heat exchanger, and then the assembly is fixed by comining with a larger side plate. CONSTITUTION:Pipes are enlarged in diameter from the side of smaller side plates, and plate fins 16 as well as each of the smaller side plates 19a, 19b, 19c and other side plate 17 are fitted. Then, for example, an upper heat exchanger 23 and a lower heat exchanger 24 are combinedly provided in an L shape, the larger side plate 26 having through-holes 27 slightly larger than the pipe diameter of hairpins 15 and capable of being adjusted to the positions of the hairpins is engaged with the hairpins 15, and the assembly is fixed by using screw- passing holes 28 of the plate 26 and female screws 25 provided on the side of each of the smaller side plates. Accordingly, the number of kinds of the side plates is reduced, and the side plates are easily constructed even when the number or blocks is increased.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method of manufacturing a heat exchanger for an air-cooled heat pump type air conditioner or the like using a medium-sized or large-sized plate heat exchanger.

Conventional configurations and their problems Conventionally, in order to store the product compactly, the heat exchanger has often been constructed by bending it into an L-shape. This L-shaped heat exchanger is constructed as shown in Figs. Nari, go outside Arpin 1a
, an inner hair pin 1b, and an inner hair pin 1C. 2 is a side plate composed of one piece on one side, 3 is a plate fin, and 4 is a U portion of the hair bin 1. In this state, each of the hair pins 1a, 1b, and 1c is expanded using a tube expansion rod in the direction of the arrow in FIG. 1, and the plate fin 3 and side plate 2 are fitted into each one.

From the fitted state, bend it in the direction of arrow B in Figure 1, and
As shown in the figure, it is configured as an L-shaped heat exchanger. In FIG. 2, the L-shaped bare bin group is located in the outer block 5.
, the middle block 6, and the inner block end, and the other side plate is provided with an outer block side plate 6a, a middle block side plate 6a, and an inner block side plate 7a. In FIG. 3, protruding pieces 9, 10, 11, and 12 are provided on each side plate,
The outer block side plate 5a is attached to the middle block side plate 6a.
The inner block side plates 6a were fixed to the inner block side plates 7a by screws 13, respectively. FIG. 4 is a sectional view of the combination of these side plates.

Conventionally, it was constructed like this, but when the straight pipe shown in Fig. 1 is bent into the L shape shown in Fig. 2, one end of the side plate provided for each block is aligned with the - line. There is no uniformity, and a certain amount of irregularity occurs. Therefore, the side plates are an outer block side plate 5a, a middle block side plate 6a, and an inner block side plate 7.
This has the disadvantage that, for example, in the case of three blocks, three types of side plates must be manufactured.

Purpose of the Invention The present invention provides an L-shaped plate heat exchanger that, when the number of blocks is increased in medium-sized or large-sized cases, can be simplified by reducing the types of side plates and increasing the number of blocks. The purpose is to enable easy configuration of side plates.

Structure of the Invention When the number of blocks is increased, the present invention provides a small side plate having the same size as the plate fin of each block, and fixes the plate with the small side plate attached by expanding the tube. After combining each block, each block is fixed at the same time by having a hole diameter that is smaller than the pipe diameter that is a hair pin, and a fixing hole that is screwed to the small side plate. It consists of a large side plate.

DESCRIPTION OF THE EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. 5 and 6. Reference numeral 15 denotes hair pins made of steel pipes that are initially in a straight pipe state, and are configured in three rows, and the hair pins 15C are formed from outside into the hair pins 15a1 and into the hair pins 15b1. 16
1 is the plate fin inserted into the arvin to these, 1 is the side plate composed of one piece on one side, 18 is the U part of the hair pin 16, 19a, 19b, 19C is attached to the end on the other side It is a small side plate. In this state, from the direction of arrow A, the hair pin 15 is
A, 16b, and 16c are expanded to form plate fins 16, side plates 17, and small side plates 19a.

19b and 19C are fitted respectively. The fitted state is bent into an L shape in the direction of arrow B in FIG. 5 to form an L-shaped heat exchanger. In FIG. 6, one side of the L-shaped heat exchanger, that is, the small side [plate 19a].

The one having 19b and 19G is shown, and since the heat exchange capacity increases as the size becomes medium or large, for example, a three-row structure is provided in upper and lower two stages. Also in the lower part of FIG. 6, small side plates 19a, 19b, and 19c are provided. In this state, an outer block 20, a middle block 21, and an inner block 22 are formed, respectively, and the same applies to the lower stage. Thus, the upper heat exchanger 23 and the upper heat exchanger 24 constitute one L-shaped heat exchanger.

Reference numeral 25 denotes a female threaded portion provided on each of the small side plates 19a, 19b, and 19c, and this female threaded portion 26 is provided above and below each small side plate.

26 is a large side plate, and this large side plate has a size that allows the upper heat exchanger 23 and the upper heat exchanger 24 to be combined at the same time.

27, the pipe diameter of each hair bin 15 is only 6-
/ Crably enlarged through holes 28 are each small side plate 19a.

Aligned with the female screws 25 provided on 19b and 19G,
This is a screw through hole through which a screw (not shown) passes.

In the above configuration, small side plates 19a, 19b, and 19c, which are approximately the same size as the plate fins 16, are attached to one side of each block constituted by the plate fins 16 attached to each hair bin 15. The tube is expanded from the side plate side, and the plate fin 16 and each small side plate 19a are formed.

19b, 19c, and the other side plate 17 are fitted. Next, the large side plate is bent into an L shape and is composed of the upper heat exchanger 23 and the upper heat exchanger 24, and has a through hole 27 slightly larger than the pipe diameter of the hair pin and aligned with the position of the hair pin 15. 26 to the hair pin 16, and screw through hole 2.
8, the female screws 25 on each small side plate side are used for fixation.

Effects of the Invention As described above, according to the method of the present invention, a small side plate is provided for each block, and this small side plate is also fitted at the same time as the plate fin, and the upper heat is transferred by the afterfire side plate configured as an L-shaped heat exchanger. Since the exchanger and upper heat exchanger are combined and fixed, even if the number of combinations of each block increases, it can be handled with two types of flllll plates: small side plates and large side plates. This has the advantage that it can be manufactured without being limited in the number of combinations since 111.

[Brief explanation of drawings]

Figures 1 to 4 are diagrams for explaining conventional examples. Figure 1 is a plan view of each block before it is bent into an L shape, and Figure 2 is a conventional example after it is bent into an L shape. FIG. 3 is a side view of the example, FIG. 4 is a cross-sectional view of the same, FIGS. 5 and 6 are explanatory views of an embodiment of the present invention, and FIG. A plan view of the heat exchanger before the pipes were expanded and bent into an L shape, No. 6
The figure is a perspective view showing an example of combination of one end with a small side plate attached. 16...Plate fins, 19a, 19b. 19c...Small side plate, 20, 21.22...Block, 25...Female screw, 26...Large side plate, 27...Through hole. Name of agent: Patent attorney Toshio Nakao and 1 other person 47
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Claims (1)

[Claims] A small side plate having the same size as the plate fin of each block is provided on one side of a plurality of blocks having hair pins and plate fins, and with this small side plate attached, the hair pins and plate fins are expanded and fixed to each block. After bending into an L shape, each block is fixed together with a large side plate having a hole diameter smaller than the pipe diameter and a screw through hole for fixing with a female screw provided on the small side plate. Method of manufacturing a heat exchanger.