JPH0449506Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a heat exchanger used in a car cooler condenser, radiator, etc.

Conventional Technologies and Problems For example, as a heat exchanger used in a condenser for a car cooler, a plurality of flat tubes are arranged in parallel, corrugated fins are arranged between adjacent tubes, and both ends of each tube are formed into a hollow cylindrical shape. A so-called multi-flow type heat exchanger that is connected in communication with a header is known.

By the way, when installing a heat exchanger having such tubes and corrugated fins on a vehicle body, etc.
Generally, a bracket 100 as shown in FIG.
is used. That is, this bracket has at least one pair (two pairs in the figure) of clamping pieces 101 having a U-shaped cross section, and these clamping pieces are disposed opposite to each other on both sides of the tube in the width direction while straddling the tube 102. , insert a bolt or screw contact fastening member from one side of the clamping piece 101 to the other side so as to penetrate the fin intervening gap 104 from the bolt hole 103 of the clamping piece 101 and tighten it, and then tighten the tube with the clamping piece 101. It is fastened and fixed in a state where it is held from both sides. In addition, in FIG. 6, 105 is a corrugated fin,
106 is a header, and 107 is a side plate.

However, when attaching the bracket 100 as described above, the corrugated fins 105 are interposed between adjacent tubes, and the fin pitch is set to be quite small in order to improve heat exchange efficiency. In this case, the corrugated fin was an obstacle to the insertion of ports and screws. For this purpose, as shown in FIG. 7, the bracket 100 is temporarily set at the mounting position, and the drill 108 is inserted through the bolt hole 103 to make an insertion hole in the corrugated fin 105, and then the fastening member is inserted. Ta.

However, this makes the process of attaching the bracket complicated and inefficient. Furthermore, when drilling holes, the tube may be damaged or the paint may peel off, leading to a decline in quality and corrosion, which leads to a deterioration in corrosion resistance.

The purpose of this invention is to provide a heat exchanger that can solve these problems, simplify the bracket mounting process, and prevent damage to the tubes, peeling of the paint, and deterioration of corrosion resistance resulting therefrom.

Means for Solving the Problems In order to achieve the above object, this invention is to remove in advance the corrugated fins at the site where the fastening member is to be inserted.

That is, this invention will be explained with reference to the reference numerals in the drawings.
The main body mounting brackets 12 and 19 are attached to the heat exchanger main body A, which is equipped with a corrugated fin 2 and a corrugated fin 2 disposed between adjacent tubes, and these brackets straddle the tube 1 in the width direction of the tube. At least one pair of clamping pieces 12a, 12b, 12c, 19a, 19b, 1 arranged oppositely on both sides of
9c is fastened and fixed by fastening members 17 and 21 inserted through the fin intervening gap 22 between the tubes, in which the fastening member 1
The gist of the heat exchanger is that spaces 18a, 18b, and 18c without corrugated fins are formed in advance at the insertion sites 7 and 21.

Here, as a preferable example of the manner in which the space is formed, if the clamping pieces of the bracket are located relatively at the ends of the heat exchanger body, the fin pitches at the fin ends may be locally filled during setting. There are cases where a space is secured by Also,
When the clamping piece of the bracket is located at the center of the heat exchanger body, a portion of the fins may be stretched flat along the tube surface at the corresponding location.

Function When attaching the brackets 12, 19 to the heat exchanger body A, the fastening members 17, 21 hold the brackets 12, 19 between the clamping pieces 1
2a... are inserted through the fin intervening gap 22 from one side to the other side, and then tightened. Space portions 18a, 18b18c are formed in advance at the portions of the fin intervening gap 22 where the fastening members 17, 21 are to be inserted.
, there is no need to use a drill to make holes for the fins.

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

In FIGS. 1 and 2, A is a heat exchanger main body, which includes a plurality of aluminum tubes 1 arranged vertically in a horizontal state, and a fin intervening gap between the adjacent tubes 1, 1. It has an aluminum corrugated fin 2 arranged at 22. The tube 1 is constructed of a flat extruded aluminum material. This tube 1 may be of a porous type, so-called a 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, and is joined to the tube by brazing. The corrugated fins 2 preferably have louvers cut and raised. Reference numerals 3 and 4 indicate aluminum side plates, which are arranged outside the upper and lower outermost corrugated fins 2 and are fixed by brazing.

Reference numerals 5 and 6 designate a pair of left and right hollow headers, each of which is formed from a single aluminum pipe with a circular cross section. As shown in FIG. 4, each hollow header 5, 6 is provided with a tube insertion hole 7, and both ends of each tube are inserted into the hole 7 and are firmly connected by brazing. There is. For such brazing, the headers 5 and 6 are formed from electric resistance welded tubes made of brazing sheets whose outer surfaces are coated with a brazing metal layer, and the corrugated fins 2 are formed from brazing sheets, and each tube 1, corrugated fin 2, and side It is extremely desirable to integrally join the plates 3, 4 and the headers 5, 6 by bulk brazing in a vacuum heating furnace or the like, since productivity can be improved. Note that 8 is a refrigerant inlet pipe, 9 is a refrigerant outlet pipe, and 10 and 11 are partition plates provided on both the left and right headers. During this period, the refrigerant flows through the tubes 1, 9, and flows out from the refrigerant outlet pipe 9.
Heat exchange is performed with the air flowing through the air circulation gap including the corrugated fins 2 formed between the corrugated fins 1 and 2, and the air is condensed.

An upper bracket 12 is attached to the upper part of the heat exchanger body A for attaching the body to a vehicle body or the like. The upper bracket 12 has three pairs of clamping pieces 12a, 12b, and 12c with a common base and a U-shaped cross section at each position near the right end, center, and left end, and mounting plates 13, 13 at both ends of the upper surface. have. Each clamping piece is placed over the heat exchanger main body A from above so as to straddle the tube 1, and the bent engagement portion 14 provided at the tip of the clamping piece
(FIG. 5) are arranged opposite to each other in a state where they are engaged with the upper and lower ends of the tube 1. And one of the clamping pieces 12a, 12b, 12c facing each other across the tube.
from the bolt hole 15 of the other clamping piece 12a, 12
A bolt 17 as a fastening member is inserted through the fin intervening gap 22 and screwed into the screw hole 16 of b, 12c, thereby being fastened and fixed to the heat exchanger main body A. The corrugated fin 2' in the fin intervening gap into which the bolt 17 is inserted has a space 18 that allows the bolt to penetrate into the bolt insertion portion.
a, 18b, and 18c are formed in advance. That is, the space 18a at the right end is formed by locally filling the fin pitch at the end 2a of the corrugated fin 2' at the setting stage, as shown in FIG. Also, the space 18 on the left side
As shown in FIG. 4, the corrugated fin 2' is formed by extending a part of the corrugated fin 2' flat along the surface of the tube 1 at the corresponding portion. The central space 18b is also formed by extending a part of the corrugated fin into a flat shape, as shown in FIG. After forming each space, the heat exchanger main body A is brazed, and then the bracket 12 is attached. When installing the bracket, the presence of the space allows the bolt 17 to be inserted as it is,
No need to drill holes. In addition, in order to prevent damage to the tubes as much as possible due to contact with the outer surfaces of the upper and lower tubes due to misalignment of the clamping pieces during tightening, the bolts 17 are provided with screws 17a only at their tips, as shown in FIG. is cut and body part 1
7b has a smooth surface without threads. On the other hand, at the bottom of the heat exchanger main body A, there are also three pairs of clamping pieces 19a, 19b, 19c,
A lower bracket 19 having opposite legs 20, 20 with grommets 20a is also attached via bolts 21. This lower bracket 19
This bracket has exactly the same structure as the upper bracket 12 in that a space is formed in advance at the site where the bolt is to be inserted in the fin intervening gap, and that only the tip of the bolt is threaded. is omitted.

In the illustrated embodiment, the right end space 18a is formed by locally filling the fin pitch of the corrugated fin 2', but a short corrugated fin with the end cut off may also be used. However, by packing the fin pitches, the filled parts are brazed in contact with each other, which has the advantage of increasing the peripheral strength against the clamping pressure of the clamping pieces. Also, the spaces 18b, 18 near the center and left end
Although the fins c were formed by stretching a portion of the fin into a flat shape, they may also be formed by cutting the fin at a corresponding portion. However, in this case, the corrugated fin is divided into a plurality of parts, which is inconvenient in handling. Therefore, it is preferable to flatten a portion as in the embodiment.

Effects of the invention As described above, this invention is advantageous in that since a space in which no corrugated fin exists is previously formed in the area where the fastening member for mounting the bracket is scheduled to be inserted, it is difficult to provide a through-hole. There is no need to use a drill to make holes in the fins. Therefore, it is possible to improve work efficiency and production efficiency by simplifying the bracket attachment process, and it is also possible to prevent damage to the tube during drilling with a drill, peeling of the paint, and deterioration of corrosion resistance resulting therefrom.

[Brief explanation of the drawing]

Figures 1 to 5 show one embodiment of this invention. Figure 1 is a front view of the entire heat exchanger, Figure 2 is a side view of Figure 1, and Figure 3 is an upper bracket installation. FIG. 4 is a perspective view of the header, corrugated fin, and tube in a separated state; FIG. 5 is a sectional view taken along line V-V in FIG. 1; FIG. 6 and FIG. 7 shows the prior art, FIG. 6 is a front view showing a part of the heat exchanger before the bracket is set, and FIG. 7 is a front view showing a part of the heat exchanger after the bracket is set. A...Heat exchanger body, 1...Tube, 2,
2'... Corrugated fin, 12, 19... Bracket, 12a, 12b, 12c, 19a, 19
b, 19c... Holding piece, 17, 21... Bolt (fastening member), 18a, 18b, 18c... Space portion.

Claims (1)

[Scope of utility model registration request] A bracket for mounting the main body is attached to a heat exchanger body including tubes for refrigerant distribution arranged in parallel and corrugated fins arranged between adjacent tubes, and this bracket straddles the tubes. In the heat exchanger, at least one pair of clamping pieces arranged oppositely on both sides in the width direction of the tubes are fastened and fixed by a fastening member inserted through a fin intervening gap between the tubes, wherein the fastening member A heat exchanger characterized in that a space in which no corrugated fins are present is formed in advance at a planned insertion site.