KR20000066590A - Manifold for heat exchanger of airconditioner and method thereof - Google Patents

Abstract

PURPOSE: A method of producing a manifold for a plate heat exchanger of an air conditioner is provided to obtain a manifold without junction by extending an aluminium pipe excellent in an elongation ratio with pressing or mandrill. CONSTITUTION: Two aluminium pipes(A) excellent in an elongation ratio are prepared to be molded to inflow pipes by formation of connecting units(A1) and bending portions(A2) respectively. Each end of the pipes(A) is put on a press die and then pressurized by a punch to form both plane press units. A couple of through holes(21) are punched lengthwise on both plane portions of each press unit. Plural cutting grooves are formed between the through holes(21). Partitions are inserted into the cutting grooves and finish panels are put into the inner diameter of each pipe(A) forcibly. Finally, the partitions and the finish panels are soldered to be fixed.

Description

Manifold for laminated heat exchanger of air conditioner and its manufacturing method {Manifold for heat exchanger of airconditioner and method

The present invention relates to a manifold for a laminated heat exchanger of an air conditioner and a method of manufacturing the same, and more particularly, to form a manifold using an aluminum pipe having good elongation, and to form the manifold and the inlet and outlet pipes integrally. There is a characteristic.

In general, an air conditioner's stacked heat exchanger is configured to stack a plurality of tubes in a plurality of layers to allow a refrigerant to flow therebetween, and to increase a heat exchange effect by interposing a fin between them.

In the stacked heat exchanger 1, the manifold 2 is used to connect the inlet pipe 11 and the outlet pipe 12 of the refrigerant, and the conventional manifold is as shown in FIG. 1 or 2. Consists of.

That is, in the case of Figure 1, but intervening between the tube and the tube, three-dimensional press-molded clad aluminum plate, and then bonded to form a pair of these facing each other to form a bag-shaped, but the hole (21) on both sides ), And the pipe connecting portion 22 is formed on one side.

However, such a manifold (2) is a structure in which not only excessive press mold production cost but also waste material left after cutting the material is generated, and waste of material is inevitable, and the two plates are joined by brazing. Because of the manufacturing process, there is a weak point that the joint is weak.

In addition, in the case of Figure 2 is connected between the tube or the outside of the tube, but should be manufactured by a forging or impact processing method, because the production is difficult, not only the productivity is greatly reduced but also disadvantageous in price.

In particular, in the case of Fig. 1 or 2, after assembling the heat exchanger, the inlet pipe 11 and the outlet pipe 12 to be inserted into the pipe connection 22 to be welded separately, so productivity and hermetic reliability were low.

Therefore, the present invention has been made in view of the conventional problems as described above to solve the problem, the main object of the invention is to produce a manifold, but the manifold without the joint by expanding the aluminum pipe with excellent elongation by press work or mandrel On the other hand, the manifold is to be integrated with the inlet and outlet pipes to improve productivity and airtight reliability.

A characteristic configuration for this purpose is to press one end of a good elongation aluminum inlet pipe (or outlet pipe) to have a width wider than its diameter to form a flat crimp, and then a pair of longitudinally arranged on both planes of the flat crimp. Perforations of each of the holes, the partition plate is inserted between the holes in the longitudinal direction, and the end plate is inserted into the end so that the interior can be sealed, the characteristic means for manufacturing this is a good elongation aluminum Select the ash pipe to form the connecting means of the tip, and the bent portion of the end to form the inlet pipe (or outlet pipe), the end of the pipe after the preparation step on the pressing die and press the punch 1st process of forming a flat crimping part, and both flat parts of the flat crimping part formed by the 1st process Punch a pair of through holes arranged in the longitudinal direction, insert the partition plate prepared in advance into the cut groove formed by the second process, the second step of forming a cut groove between the through hole and the through hole, and the end plate as the end diameter A third step of pushing the product into the form of interference fit; It is intended to be manufactured through a fourth step of soldering and fixing the partition plate and the finishing plate inserted through the third step.

1 is a configuration diagram of a manifold for a conventional stacked heat exchanger

2 is a configuration diagram of another manifold for a conventional stacked heat exchanger

3 is a block diagram of a manifold according to the present invention

4 is a schematic diagram of an inlet and an outlet pipe having a manifold of the present invention;

5 is a process chart showing a manufacturing process of the present invention

Figure 6 is another embodiment according to the manufacturing process of the present invention

<Description of the code | symbol about the principal part of drawing>

1 Stacked Heat Exchanger 2 Manifold

11: inlet pipe 12: outlet pipe

21: through hole 23: flat crimp

24: partition plate 25: incision groove

26: finishing plate

Hereinafter, a configuration and a manufacturing method according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Figure 3 shows a manifold (2) according to the present invention, Figure 4 is an illustration of the inlet pipe and outlet pipe integrally formed with the manifold (2) of the present invention.

As shown in the figure, the manifold 2 of the present invention is formed by pressing one end of the pipe to have a width wider than its diameter to form a flat crimp 23, and then longitudinally in both planes of the flat crimp 23. Perforated a pair of through-holes 21 listed as, respectively, between the through-holes 21 listed in the longitudinal direction inserted and fixed partition plate 24, the end is inserted into the closing plate 26 can be sealed inside. It would be.

At this time, the partition plate 24 is formed on the narrow side of the flat crimping section 23 to form a cutting groove 25 according to its thickness and width, and inserted into the interior through the cutting groove, then brazing or welding, etc. The closing plate 26 is formed in the same dimension as the inner diameter of the end of the flat crimping portion 23, but formed so that the edge (26a), it is pushed in the state of interference fit from the outside It is to be fixed by soldering.

Manifold of the present invention configured as described above can be used to connect to the middle or outer side of the ordinary tube laminated as shown in Figure 1 or 2, which is similar to the conventional connection method, but by pressing one pipe Not only is the airtightness good, but it also eliminates the process of connecting the manifold to the inlet pipe (or outlet pipe), making it easier to manufacture the heat exchanger and lowering the manufacturing cost.

On the other hand, the method of manufacturing the manifold of the present invention is completed through the preparation step and the first step to the third step as shown in Figs.

That is, a preliminary step of selecting an aluminum pipe A having good elongation, forming a connecting means A1 at the tip, such as a screw portion, and a middle bent portion A2, and forming the inlet pipe (or outlet pipe), and Both the first and second planar crimps formed by the first and second steps are formed by placing the end of the pipe A, which has been prepared, on the crimping die D, and pressing the punch P to form the planar crimp 23. Drilling a pair of through holes arranged in the longitudinal direction in the plane portion, inserting the partition plate prepared in advance into the cut groove formed by the second step, the second step of forming a cut groove between the through hole and the through hole, the end inner diameter Is manufactured in the order of the third step of pushing the closing plate in the form of interference fit, and the fourth step of soldering and fixing the partition plate 24 and the closing plate 26.

In this case, the first process may be formed by inserting the expansion mandrel (M) into the end of the pipe to form a flat crimping portion 23, the same product can be obtained even if the subsequent steps are performed in the same process. have.

Since the manifold of the present invention as described in detail above is made by crimping one pipe, it is not only airtight but also the process of connecting the manifold to the inlet pipe (or outlet pipe) is omitted. It is easy and also the good thing to manufacture through the above process is that the mold is relatively simple, the mold manufacturing cost is low, and the manufacturing process is simple, not only does it greatly improve the productivity, but also because it is not made by cutting the plate material There is a lot of advantages, such as no waste, and improved confidentiality.

Claims (5)

One end of the aluminum material inlet pipe (or outlet pipe) having a good elongation is pressed to have a width wider than its diameter to form a flat crimp section 23, and then the two flat faces of the flat crimp section 23 are arranged in the longitudinal direction. A pair of through holes 21 are drilled respectively, and partition partitions 24 are inserted and fixed between these holes 21 arranged in the longitudinal direction, and a closing plate 26 is inserted at the ends to seal the inside thereof. Air conditioner manifold for laminated heat exchanger characterized in that. The method of claim 1, The partition plate 24 is formed on the narrow side of the flat crimping section 23, the incision groove 25 according to its thickness and width, and then inserted from the outside, and fixed by brazing (or welding) Air conditioner manifold for stacked heat exchangers. The method of claim 1, The finishing plate 26 is formed in the same dimension as the inner diameter of the end of the flat pressing portion 23, and formed so that the edge 26a, and then pushed in the state of interference fit from the outside, by brazing (or welding) The air conditioner manifold for stacked heat exchangers, characterized in that fixed. A preliminary step of selecting an aluminum elongation pipe (A) having good elongation to form a connecting means (A1) at the tip and a bent portion (A2) at the distal end to form an inlet pipe (or an outlet pipe); A first step of placing the end of the pipe subjected to the above preparation process on the pressing die (D) and pressing it with a punch (P) to form a flat pressing portion (23); A second step of drilling a pair of through holes 21 arranged in the longitudinal direction on both planar portions of the flat pressing portion 23 formed by the first step, and forming a cutout groove 25 between the through holes and the through holes; A third step of inserting the partition plate 24 prepared in advance into the cutout groove 25 formed by the second step, and pushing the finish plate 26 in the form of an interference fit as the end inner diameter; A fourth step of fixing the partition plate 24 and the closing plate 26 fitted through the third step by brazing (or welding); Method of manufacturing a manifold for an air conditioner stacked heat exchanger, characterized in that the manufacturing through. The method of claim 4, wherein The first step is a method for manufacturing an air conditioner stacked heat exchange manifold, characterized in that the expansion pipe mandrel (M) is inserted into the end of the pipe to form a flat pressing portion (23).