JPH0435742Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a heat exchanger used in a car cooler condenser, etc., and particularly to a so-called header type heat exchanger.

Conventional technology and its problems Conventionally, a so-called header type heat exchanger has been used as a heat exchanger, in which a plurality of tubes and corrugated fins are stacked, and both ends of each tube are connected to a hollow header. It has been known.

In such a heat exchanger, the headers and tubes are generally connected by temporarily assembling the tubes by inserting both ends of the tubes into the headers through insertion holes drilled in the peripheral wall of each header, and then performing brazing, etc. It is done by applying.

However, in the conventional heat exchanger as described above, there was no means for positioning the insertion of the tube into the header, so it was difficult to set the insertion amount of the tube into the header during the assembly stage, and if the insertion amount was too small, On the other hand, if the tube is inserted too far into the header, the tube end surface and the inner circumferential surface of the header may come into contact with or be close to each other. There was a problem in that during brazing, there was a risk that the brazing material would become clogged and the opening of the tube would be blocked. For this reason, it takes a long time to insert the tube into the header, which is one of the reasons for hindering the improvement of the workability of assembling the heat exchanger and thus the productivity. Moreover, even if the tube is inserted into the header to the appropriate length and temporarily assembled, there is a risk that the tube may shift in the direction of falling out or entering the header after temporary assembly and before joining.
As a result, there is an unavoidable risk that the tube may fall off or become clogged with the brazing filler metal as described above.

This invention was made in view of these problems, and it is possible to automatically regulate the amount of tube insertion into the header during temporary assembly to an unambiguous and appropriate amount, and also to prevent insufficient or excessive insertion. The object of the present invention is to provide a heat exchanger that can avoid the dangers such as tubes falling out of the header or clogging of tubes due to brazing filler metal.

Means for Solving the Problems In order to achieve the above object, this invention forms a protruding abutting plate for inserting and positioning the tube inside the header until the tube comes into contact with this abutting plate. It is characterized by being inserted and joined.

That is, this invention provides a heat exchanger in which a plurality of tubes and corrugated fins are laminated in an alternating arrangement, and both ends of each tube are inserted and connected to a hollow header, in which a cross section of the internal hollow part of the tube is inserted into the header. An abutment plate is provided that protrudes in the direction of the tube to a midway position, and the tube has a part of its end surface abutted against the abutment plate, so that the insertion position into the header is restricted. The gist of this invention is a heat exchanger characterized by being bonded and fixed to a header.

Embodiment Next, the structure of this invention will be explained based on an embodiment in which it is applied to an aluminum heat exchanger for a condenser.

In FIGS. 1 to 5, reference numeral 1 indicates a plurality of tubes arranged vertically in a horizontal state, and reference numeral 2 indicates a corrugated fin interposed between adjacent tubes 1,1. The tube 1 is constructed of a flat extruded aluminum material. The internal refrigerant passage 3 of the tube 1 is formed by a partition wall 1a provided at the center in the width direction, and has two independent passage parts, front and rear. Note that the tube 1 may be of a porous type, such as a so-called harmonica tube. Furthermore, an electric resistance welded tube may be used instead of the extruded material. The corrugated fin 2 has approximately the same width as the tube 1,
It is joined to the tube by brazing. The corrugated fins 2 are also made of aluminum, and preferably have louvers cut and raised.

4 and 5 are a pair of headers arranged on the left and right. These headers are formed from aluminum hollow extrusions having a circular cross section. Tube insertion holes 6 are formed in each header 4, 5 at intervals along the length direction, and hollow portions 4a, 5a are formed at the tips of the headers at positions opposite to the insertion holes 6 on the inner surface of the header. Abutment plates 7, 8 for inserting and positioning the tube, which protrude almost to the center of the cross section, are integrally molded along the length direction of the headers 4, 5. Each tube 1 has its both ends connected to the insertion hole 6 through the headers 4 and 5.
As the refrigerant is inserted into the interior, the center partition wall 1a of the refrigerant passage is brought into contact with the tips of the abutment plates 7 and 8, so that the insertion position is regulated by brazing. header 4,
5 is firmly joined and connected.

Furthermore, a refrigerant inlet pipe 9 is provided at the upper end of the left header 4.
is connected to the right header 5, and an outlet pipe 10 is connected to the lower end of the right header 5. Further, the lower end of the left header 4 and the upper end of the right header 5 are closed by lid pieces 11 and 12, respectively. Furthermore, a partition plate 13 is provided approximately at the center of the left header 4 to divide the header into two upper and lower chambers, while a partition plate 14 is also provided below the center of the right header 5. from the refrigerant inlet pipe 9 to the left header 4.
The refrigerant flowing into the tubes flows in a meandering manner around the entire refrigerant passage constituted by the tube group and flows out from the refrigerant outlet pipe 10.
Heat is exchanged with the air flowing in the direction shown by arrow W through the air circulation gap including the corrugated fins 2 formed therebetween, and the air is condensed. In addition,
Reference numerals 15 and 16 shown in FIG. 2 are upper and lower side plates arranged outside the outermost corrugated fin.

Next, another embodiment of this invention will be described. In the embodiment shown below, the same components as those in the first embodiment described above are denoted by the same reference numerals, and the explanation thereof will be omitted. FIGS. 6 and 7 show a second embodiment of this invention, and in this embodiment,
A notch-like recess 20 is provided in the central partition wall 1a of the tube 1, which can fit into the abutment plates 7 and 8 of the headers 4 and 5.
is formed, the tube 1 has the recess 20 formed therein, and the tube 1 has the recess 20 formed in the abutment plates 7, 8.
The insertion position is regulated by being abutted against the tip of the holder so as to be in a fitted state. In this way, by forming the fitting and abutting structure between the recess 20 and the abutting plates 7 and 8, the header and the tube are temporarily fixed, and not only the displacement in the length direction of the tube 1 but also the header 4 is prevented. , 5 in the rotational direction can also be prevented, and a high quality heat exchanger with higher assembly accuracy can be obtained.

In the two embodiments described above, the insertion position of the tube 1 into the header is determined by abutment between the central partition wall 1a of the tube and one abutment plate. 8
As shown in the drawings and FIG. 9, two abutment plates 7 and 8 may be provided in parallel, and both ends of the tube in the width direction may be abutted against the abutment plates. Alternatively, although not shown, three or more abutment plates may be provided.

Effects of the invention As described above, this invention provides an abutting plate at a predetermined arrangement within the header, and a part of the end surface of the tube is brought into contact with the abutting plate. Since the insertion position is restricted, the following effects are achieved. In other words, when inserting the tubes into the header when assembling the heat exchanger, it is only necessary to insert the tubes until the end surfaces of the tubes hit the abutting plates, so each tube can be inserted into a unique and appropriate position. It will be done automatically.
As a result, the insertion work is simplified, the working time is shortened, and the productivity of the heat exchanger can be improved. Moreover, in the temporary assembly state after inserting each tube into the header, not only can the tube be pushed into the header incorrectly, but also by applying pressure in the tube compression direction between both headers. Also, it is possible to reliably prevent displacement in the direction of falling off from the header, and to join the tube and the header while ensuring a proper insertion state of the tube. Therefore, it is possible to prevent joint failures such as tubes falling off due to insufficient insertion into the header and clogging of tubes due to brazing filler metal due to over-insertion, resulting in a heat exchanger with good quality and stable performance. sell.

Furthermore, since the tube is fixed to the header while being abutted against the abutment plate, when a compressive external force is applied to the header in the direction of the tube, the abutment plate functions as a reinforcing material, causing a dent in the header. and damage can be prevented. Therefore, the strength of the header and the strength of the entire heat exchanger can be improved, and a heat exchanger with excellent durability can be obtained.

Furthermore, since the abutment plate is provided inside the header, there are no restrictions on the outer peripheral shape of the header or tube, allowing sufficient freedom in shape selection when designing the header or tube. , it is possible to manufacture a heat exchanger with an optimal shape according to the requirements.

Furthermore, when the heat exchanger is used particularly as a condenser, the liquefied refrigerant can be allowed to adhere to the abutment plate and flow down, suppressing the flow of liquid refrigerant into the tube and improving heat exchange performance due to liquid clogging. It also has the effect of preventing a decrease in .

[Brief explanation of the drawing]

Figures 1 to 5 show the first embodiment of this invention. Figure 1 is a sectional view of the main parts showing the state of connection between the header and the tube, and Figure 2 is a front view of the entire heat exchanger. , FIG. 3 is a plan view, FIG. 4 is a perspective view showing the header, tube, and corrugated fin in a separated state, and FIG.
A line sectional view, FIGS. 6 and 7 show a second embodiment of this invention, and a sectional view corresponding to FIG. 1 showing the joint state of the header and tube, and FIG. FIG. 8 is a perspective view corresponding to FIG. 4 showing the fins in a separated state, and FIG. 8 is a sectional view corresponding to FIG. FIG. 9 shows a fourth embodiment of this invention, and is a sectional view corresponding to FIG. 1 showing the state of connection between the header and the tube. 1...Tube, 2...Colgate Finn,
4, 5... Header, 7, 8... Butt plate.

Claims (1)

[Claims for Utility Model Registration] (1) A heat exchanger in which a plurality of tubes and corrugated fins are laminated in an alternating arrangement, and both ends of each tube are inserted into a hollow header and connected in communication with the header. An abutment plate is provided that protrudes in the direction of the tube up to a midway point in the cross section of the internal hollow part, while the tube has a part of its end surface abutted against the abutment plate, so that the tube can be inserted into the header at its insertion position. A heat exchanger characterized by being bonded and fixed to a header in a regulated state. (2) The heat exchanger according to claim 1, wherein a concave portion that fits into the abutment plate is formed at a portion of the tube end surface that abuts the abutment plate.