JPH0517389U - Heat exchanger - Google Patents

Abstract

(57) [Abstract] [Purpose] The inlet / outlet pipe can be fixed to the side plate side without the need for a separate member such as a clamp member, and the tube may be damaged or deformed at the time of fixing to fix the heat exchange medium. It is an object of the present invention to provide a heat exchanger having excellent productivity, which does not cause leakage of hydrogen or increase in pressure loss. [Structure] As the side plates (9) (9) arranged outside the outermost fin (2), those having an outwardly projecting wall portion (9a) in a part of the longitudinal direction thereof are used. Then, a hole (9b) is bored in the protruding wall (9a). Then, the other end (7b) of the heat exchange medium inlet / outlet pipe (7) whose one end (7a) is communicatively connected to the headers (3) and (4) is fitted into the hole (9b) and the projection is made. Fix it to the wall (9a).

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a heat exchanger used in, for example, a condenser for a car cooler, an evaporator, a radiator, or the like.

[0002]

[Prior Art]

 As a heat exchanger used in a condenser for a car cooler, for example, as shown in FIG. 6, a plurality of flat tubes (11) and corrugated fins (12) are stacked alternately and each tube is stacked. A so-called header type having a heat exchanger body (A) in which a pair of cylindrical hollow headers (13) and (14) are connected to both ends of (11) is widely used.

In this type of heat exchanger body (A), a heat exchange medium inlet pipe (16) and a heat exchange medium outlet pipe (17) are connected to the headers (13) and (14), respectively. Depending on the mounting side of the exchanger body (A), the inlet / outlet pipes (16) (17) are extended to extend along the side plates (19) arranged outside the outermost fins (12). It may be required to fix it in this way. In such a case, in the conventional heat exchanger, as shown in FIG. 6, the tip end portion (17b) of the outlet pipe (17) extended along the side plate (19) is fixed to the clamp member (20). It was used and fixed.

As this type of clamp member (20), for example, as shown in FIGS. 7 (a) and 7 (b), a pair of opposing holding wall portions (20a) and (20b) and a connecting end that connects both lower ends thereof are connected. The one having a wall portion (20c) and a hanging wall portion (20d) extending downward from one side edge thereof was used.

Therefore, the clamp member (20) is fitted with the pair of holding wall portions (20a, 20b) from the lower side of the side plate (19) to the heat exchanger main body (A) so as to hold the holding member. The fastening members (22) such as screws are inserted through the hole portions (21) (21) formed in the wall portions (20a) (20b) and fastened to the heat exchanger main body (A) to be clamped and fixed. To be done. Then, the tip portion (17b) of the outlet pipe (17) was inserted into and fixed to the hole portion (23) formed in the hanging wall portion (20d) of the clamp member (20).

[0006]

[Problems to be solved by the device]

 However, in the case of fixing the inlet / outlet pipe using this type of clamp member, the number of parts and the assembling process increase, which in turn lowers the productivity. Further, in the above clamp member, the fastening member must be penetrated through the heat exchanger body, but during this penetration work, the fastening member may come into contact with the tube and the tube may be damaged, resulting in leakage of the heat exchange medium. Not only that, when the sandwiching wall portion is fastened, the wall portion presses both side surfaces of the tube, so that the tube is deformed to reduce the heat exchange medium circulation area and increase the heat exchange medium circulation pressure loss. I had one. Further, since the sandwiching wall portion is arranged so as to close a part of the air circulation surface of the heat exchanger main body, the heat exchange efficiency may be slightly lowered.

The present invention has been made to solve the above-mentioned problems, and the inlet / outlet pipe can be fixed to the side plate side without the need for a separate member such as a clamp member. It is an object of the present invention to provide a heat exchanger having excellent productivity, which does not cause damage or deformation of the heat exchange medium to increase leakage of the heat exchange medium or pressure loss.

[0008]

[Means for Solving the Problems]

 Therefore, in this invention, an outwardly projecting wall is provided in a part of the side plate in the longitudinal direction, and a hole is formed in the wall so that the tip of the inlet / outlet pipe is inserted into the hole. It is designed to be fitted and fixed.

That is, according to the present invention, a plurality of flat tubes and fins are stacked alternately, a pair of hollow headers are connected to both ends of the tubes, and a side plate is provided outside the outermost fin. In the heat exchanger in which the outer plate wall is integrally provided on a part of the side plate in the longitudinal direction, and the wall part is provided with a hole, the header is formed. A heat exchanger characterized in that a heat exchange medium inlet / outlet pipe having one end communicated with the other end is fixed to the protruding wall with the other end fitted in the hole. is there.

The outward projecting wall portion may be formed by fixing a band plate material as a separate member to the side plate by spot welding or the like, or may be formed by bending the side plate to project outward. It may be formed by. In the latter case, the folded back opposing wall portions may be formed in a double-walled shape in which they are in close contact with each other, or the opposing wall portions may be spaced apart to form a U-shape in side view. It may be formed in

It is possible to easily insert the end portion of the heat exchange medium inlet / outlet pipe into the hole portion of the outward protruding wall portion, and yet to be firmly fixed in the inserted state so that vibration noise is not generated. For the purpose, the outward protruding wall is set to be inclined with respect to the side plate, and the hole formed in the wall is slightly larger than the end cross section of the heat exchange medium inlet / outlet pipe to be inserted into the hole. It is preferable to set to.

The hole portion of the outwardly projecting wall portion is not limited to the one that penetrates the center portion in the width direction of the wall portion, but is cut out, for example, in a U shape from the side of the wall portion. It could be something like

The position of the outward projecting wall portion may be appropriately set according to the mounted side, such as the middle portion or the end portion of the side plate in the longitudinal direction.

[0014] When collectively brazing heat exchanger constituent members such as headers and tubes in a furnace, an end of the heat exchange medium inlet / outlet pipe can be brazed integrally with the outward protruding wall portion. As the protruding wall portion, a brazing sheet having a brazing material layer coated on at least one surface of the core material may be used.

[0015]

【Example】

 Hereinafter, a description will be given based on an embodiment in which the present invention is applied to a multi-flow type aluminum heat exchanger as a condenser used in a car air conditioner.

In this specification, the term aluminum is used to include its alloy.

In FIG. 1, (A) is a heat exchanger main body, and the main body (A) is a plurality of flat tubes (1) made of aluminum arranged vertically in a horizontal state and adjacent tubes (1). 1) Aluminum corrugated fins (2) arranged between (1) and outside the outermost tube (1), and a pair of left and right headers (3) (4) arranged on both sides of the tube (1). ) And.

The tube (1) is composed of a flat extruded mold material made of an aluminum material. As this tube (1), it is possible to use a porous type which is called a so-called harmonica tube having excellent pressure resistance and thermal conductivity, and an electric resistance welded tube or the like is used regardless of the extruded shape material. May be. In this case, for the same reason, it is preferable to provide a partition wall along the longitudinal direction inside the partition wall.

The corrugated fin (2) is formed by bending a band-shaped brazing sheet in which a brazing material layer is formed on both surfaces of an aluminum core material having a width substantially the same as that of the tube (1) in a meandering shape. It is joined to the tube (1) by attachment. The corrugated fins (2) are preferably cut and raised louvers (2a) in order to further improve the heat exchange efficiency.

The headers (3) and (4) are made of aluminum pipes having a circular cross section, and tube insertion holes (3a) and (4a) are vertically arranged at predetermined intervals. The tubes (1) are connected to the headers (3) and (4) so that the ends of the tubes (1) are inserted into the tube insertion holes (3a) and (4a) by a predetermined amount. . As the headers (3) and (4), a hollow extruded mold material having a circular cross section may be used, or a brazing sheet may be formed into a tubular shape and the corresponding edges are joined by brazing or electric resistance welding. You may use what was integrated.

Both headers (3) and (4) are closed at their ends by lids (5) and (5), respectively. As shown in FIGS. 5 (a) and (b), the lid body (5) has an end face wall (5a) and a rising wall (5b) formed on the periphery thereof, and the end face wall (5a) It has a male screw portion (5c) projecting outwardly, and a rising wall (5b) is integrally brazed to the headers (3) and (4) in an externally fitted state. A bracket (B) having an L-shape in side view is removably fastened and fixed to the screw portion (5c) by a nut (N) with one end thereof being inserted.

As shown in FIG. 1, a heat exchange medium inlet pipe (6) is connected to the outer upper part of the right header (4) in a laterally protruding manner, while the heat exchange medium inlet pipe (6) is connected to the lower outer part of the left header (3). The outlet pipe (7) is connected. A partition plate (8) for dividing the header (4) into upper and lower chambers is provided at a position about one third of the upper end of the right header (4), while the partition plate (8) is divided from the lower end of the left header (3) to 3 A partition plate (8) is also provided at about one-third of the places, and the total heat exchange medium passages constituted by the tube group are divided into upper and lower three-stage passage groups, and the heat exchange medium meanders in each passage group. Flowing out from the heat exchange medium outlet pipe (7), during which heat exchange is performed with the air flowing through the air flow gap including the corrugated fins (2) formed between the tubes (1), It is supposed to condense.

As shown in FIG. 3, the partition plates (8) and (8) are formed on the inner peripheral surface of the header (3) and have a small diameter portion (8a) that fits closely with the header and the header (3). ). The large-diameter portion (8b) fitted in the partition plate insertion slit (3b) formed in), and the tongue-like shape extending in the radial direction from the intermediate portion of the peripheral edge of the large-diameter portion (8b). It has a protrusion (8c). Then, the partition plate (8) is inserted into the slit (3b) from the small diameter portion (8a) side, and the outer peripheral edge of the small diameter portion (8a) is attached to the inner peripheral surface of the header and the large diameter portion. The peripheral edge portion of the portion (8b) is brazed and integrated with the header (3) with the peripheral edge portion fitted in the slit (3b).

Accordingly, the partition plate insertion slit (3b) is formed between the adjacent tube insertion hole portions (3a) (3a) of the header (3), and the partition plate (8) is formed in the slit (3b). 4) is inserted as described above, the tip of the protruding portion (8c) of the partition plate (8) is placed between the adjacent tubes (1) and (1) as shown in FIG. It is in a state of being in contact with the end portion of (2). Therefore, there is no inconvenience that the partition plate (8) slips off from the header (3) or shifts when the temporarily assembled heat exchanger component parts are carried into the furnace and brazed together. It is securely brazed and integrated in place in the header.

As shown in FIG. 1, a side plate (9) made of an aluminum strip plate material having substantially the same width as that of the corrugated fin (2) is arranged outside the outermost fin (2). The upper side plate (9) of the heat exchanger body (A) has only the left and right ends bent to the fin (2) side as in the conventional case, but the lower side plate (9) of the same. 9) is configured such that a part in the longitudinal direction is bent obliquely downward at a position closer to the right header (4) and has an outwardly projecting wall portion (9a). ) Has a hole (9b). The heat exchange medium outlet pipe (7) having one end (7a) communicated with the left header (3) is extended along the lower side plate (9) and the other end (7b). Is fixed to the protruding wall portion (9a) while being fitted in the hole portion (9b).

Since the outwardly projecting wall portion (9a) thus inserts and fixes the heat exchange medium outlet pipe (7), the insertion work can be performed easily, and the outlet can be maintained in the inserted state. It is desired that the tube (7) can be firmly fixed. Thus, in this embodiment, the outwardly projecting wall portion (9a) is provided with the hole portion (9b) having a diameter slightly larger than the end cross section of the outlet pipe (7), and the outlet pipe in the inserted state. The upper and lower ends of (7) are locked to the upper and lower ends of the hole (9b).

In the above embodiment, the outward projecting wall portion (9a) is formed by bending a part of the side plate (9), but of course, the side plate (9a) is formed. The outer protruding wall portion (9a) may be provided in the member 9) by spot-welding and fixing a separate member.

Further, not only when the heat exchange medium outlet pipe (7) is fixed to the lower side plate (9) side, the present invention uses the upper and lower side plates or the upper side plate only. It also includes the case of fixing the exchange medium inlet pipe, the outlet pipe, or both.

[0029]

[Effect of the device]

 As described above, in the heat exchanger according to the present invention, the outward protruding wall portion is integrally provided on a part of the side plate disposed outside the outermost fin in the longitudinal direction, and A hole is bored in the wall, while a heat exchange medium inlet / outlet pipe having one end connected to the header for communication is fixed to the protruding wall with the other end fitted in the hole. Therefore, when fixing the tip of the heat exchange medium inlet / outlet pipe to the side plate side, a separate member such as a clamp member may be unnecessary. Therefore, the number of parts can be reduced and productivity can be improved.

Moreover, since it is not necessary to insert a fastening member such as a screw into the heat exchanger body when fixing the inlet / outlet pipe, the tube may be damaged and the heat exchange medium may leak, or the tube may be damaged. Inconveniences such as deformation and increase in pressure loss can be avoided. Also, since the side plate is used for mounting, the air circulation gap of the heat exchanger body is not blocked unlike the conventional mounting bracket, so that heat exchange efficiency is not reduced. ..

[Brief description of drawings]

FIG. 1 (a) is a plan view of a heat exchanger according to the present invention, and FIG. 1 (b) is a side view thereof.

FIG. 2 is an enlarged sectional view taken along the line II-II in FIG.

FIG. 3 is a perspective view showing a header, a partition plate, and a tube in a separated state.

FIG. 4 is an enlarged vertical cross-sectional view of the heat exchanger near the partition plate.

FIG. 5 (a) is a front view showing the vicinity of the lower end of the right header, and FIG. 5 (b) is a front view showing the vicinity of the lower end of the right header partially shown in section with the mounting bracket removed. is there.

FIG. 6 is a front view of a conventional heat exchanger.

FIG. 7 (a) is an enlarged plan view of the vicinity of a tip fixing portion of a heat exchange medium outlet pipe of a conventional heat exchanger, and FIG. 7 (b) is an enlarged side view thereof.

[Explanation of symbols]

 1 ... Tube 2 ... Fins 3 and 4 ... Header 6 ... Heat exchange medium inlet tube 7 ... Heat exchange medium outlet tube 7a ... One end 7b ... The other end 9 ... Side plate 9a ... Outer protruding wall 9b ... Hole

Claims (1)

[Scope of utility model registration request] 1. A plurality of flat tubes (1) and fins (2) are laminated in an alternating arrangement, and a pair of hollow headers (3) (4) are communicatively connected to both ends of the tubes (1), and In a heat exchanger in which a side plate (9) is arranged outside the outermost fin (2), an outer protruding wall portion (9a) is integrally formed at a part of the side plate (9) in the longitudinal direction. And the wall (9
The heat exchange medium inlet / outlet pipe (7) having one end (7a) communicated with the header (3) is provided with the other end (7b) while the hole (9b) is provided in the a). A heat exchanger, wherein the heat exchanger is fixed to the protruding wall portion (9a) while being fitted in the (9b).