JP2001091187A - Heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heater core having enhanced performance in which the corrugated fins in the outermost row are not closed by the flange or packing of a side plate. SOLUTION: The core 4 of a heater core 1 comprises a stack of tubes 2 and corrugated fins 3 clamped by a pair of side plates 6. The side plate 6 has flanges 11 at the front and rear edges wherein the flange 11 at the front edge is located on the upstream side of the front edge of the core 4 and the flange 11 at the rear edge is located on the downstream side of the rear edge of the core 4. Both flanges 11 are directed toward the core 4 side and a packing 12 is applied to the front face of the flange 11 at the front edge and the rear face of the flange 11 at the rear edge. Since the corrugated fins 3 in the outermost row are not closed by the flange 11 or the packing 12, air flows smoothly and the performance of the heater core 1 is enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger in which a core formed by laminating a tube and a corrugated fin is sandwiched between a pair of side plates on both sides.

[0002]

2. Description of the Related Art As a heat exchanger in which both sides of a core are sandwiched between a pair of side plates, a technique disclosed in Japanese Patent Application Laid-Open No. 8-42989 is known. In the heat exchanger disclosed in this publication, as shown in FIG. 3, a front edge and a rear edge of a side plate J1 are formed by a tube J2 and a corrugated fin J.
3 coincides with the leading edge and the trailing edge of the core J4 formed by laminating the core 3 and the bending direction of the leading edge and the trailing edge of the side plate J1 are directed toward a different side from the core J4. .

[0003]

However, in the heat exchanger having the above structure, as shown in FIG.
The packing J5 for preventing air leakage is attached to the front edge and the rear edge of the
3 is closed by the packing J5, the air does not pass, and the heat exchange performance deteriorates. In order to solve this problem, if the height Hb of the flange J6 formed to be different from the core J4 provided on the front edge and the rear edge of the side plate J1 is increased, the stacking direction of the core J4 is increased. Dimensions become short, and the problem that heat exchange performance deteriorates occurs. Even if the flange J6 is bent toward the core J4 to increase the height Hb of the flange J6, the flange J6 blocks the outermost row of corrugated fins, preventing the passage of wind and deteriorating heat exchange performance. Failure occurs.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a heat exchanger in which the heat exchange performance is not deteriorated by packing or flanges of side plates.

[0005]

According to the present invention, the flange at the leading edge of the side plate is located upstream of the leading edge of the core, and the flange at the trailing edge of the side plate is located downstream of the trailing edge of the core. Even if the flange is bent to the core side and the height of the flange is increased, the problem that the flange blocks the outermost row of corrugated fins does not occur, and wind also passes through the outermost row of corrugated fins, deteriorating heat exchange performance. No problems occur. In addition, packing is arranged on the front surface of the front edge flange of the side plate and the rear surface of the rear edge flange, so that packing does not block the outermost row of corrugated fins. There is no problem that the heat exchange performance is deteriorated because the wind passes. In other words, the heat exchanger adopting claim 1 does not suffer from the problem that the heat exchange performance is deteriorated by the packing or the flange of the side plate.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which a heat exchanger of the present invention is applied to a heater core used in an air conditioner for a vehicle and another embodiment will be described. [Embodiment] FIG. 1 is a sectional view of a main part of a heater core, and FIG. 2 is a perspective view of the heater core. The heater core 1 is formed of a metal material such as brass or aluminum, and roughly divided into a core 4 in which tubes 2 and corrugated fins 3 are alternately laminated, and a pair of headers 5 joined to both ends of each tube 2. And a pair of side plates 6 connected to a pair of headers 5 with the core 4 sandwiched from both sides.

The tube 2 is a cooling water (hot water) flowing inside.
And a flat tube that performs heat exchange with air passing between the tubes 2, and has a fluid passage through which cooling water flows. The corrugated fins 3 are arranged between the tubes 2 and outside the outermost tubes 2, and improve the heat exchange rate between the cooling water flowing inside the tubes 2 and the air flowing between the tubes 2. It is. The corrugated fins 3 are provided by bending a strip-shaped ultra-thin plate material in a wave-like manner. Note that a large number of louvers are usually formed in the corrugated fin 3 in order to improve the heat exchange efficiency.

The header 5 is a substantially box-shaped tank joined to both ends of each tube 2 for distributing and collecting cooling water. The header 5 has a header plate into which each tube 2 is inserted, and a header tank combined with the header plate. Consists of An inlet pipe 7 for flowing cooling water into the header 5 is connected to one header 5, and the other header 5 is
An outlet pipe 8 through which the cooling water in the header 5 flows out.
Is connected.

As shown in FIG. 1, the side plate 6 is a press-formed product having a substantially U-shaped cross section except for both ends joined to the header 5, and has a reinforcing member in the center along the longitudinal direction of the tube 2. Are formed, and flanges 11 are also formed at both ends (the front edge and the rear edge of the side plate 6). The flange 11 is provided on the side plate 6
And the bending direction of the flange 11 is arranged toward the core 4 side. The height Ha of the flange 11 is set to be larger than the conventional height Hb (reference numeral, see FIG. 3) (Ha> Hb), and the height Ha of the flange 11 is, for example, 5 mm or more.

The front edge flange 11 is disposed upstream of the front edge of the core 4 in the air passage direction. Further, the rear edge flange 11 is disposed downstream of the rear edge of the core 4 in the air passage direction. The length A of the front edge of the front flange 11 and the front edge of the core 4 and the length B of the rear edge flange 11 and the rear edge of the core 4 are both set to 2 mm or more. The width Da is provided to be larger than the width Db of the core 4 (Da> Db).

A packing 12 for preventing air leakage is attached to the front surface of the front edge flange 11 and the rear surface of the rear edge flange 11, as shown in FIG. It is provided to prevent air from leaking from between a case (not shown) and the side plate 6.

As described above, in the heater core 1 in the present embodiment, the flange 11 at the front edge of the side plate 6 is disposed upstream of the front edge of the core 4 and the rear edge of the side plate 6 Since the flange 11 is disposed downstream of the trailing edge of the core 4, the front and rear edge flanges 11 are bent toward the core 4 and the height H of the flange 11 is increased.
Even if a is increased, the problem that the flanges 11 at the front edge and the rear edge close the corrugated fins 3 in the outermost row does not occur. Thereby, the wind also passes through the corrugated fins 3 in the outermost row in the core 4, and the air heating performance of the heater core 1 is improved.

The packing 12 comprises a front surface of the front edge flange 11 of the side plate 6 and a rear edge flange 11.
Since the packing 12 is disposed on the rear surface, the packing 12 does not block the outermost corrugated fins 3. This also allows the wind to pass through the corrugated fins 3 in the outermost row of the core 4 and improves the air heating performance. As described above, the heater core 1 in the present embodiment does not cause a problem that the outermost row of corrugated fins 3 is blocked by the packing 12 and the flange 11 of the side plate 6, and improves the air heating performance as compared with the related art. be able to.

[Other Embodiments] In the above-described embodiment, an example in which the present invention is applied to the heater core 1 of a vehicle air conditioner has been described. However, not only a refrigerant condenser and a refrigerant evaporator of a refrigeration cycle, but also a radiator and an oil The present invention is applicable to a heat exchanger such as a cooler or an intercooler that exchanges heat between a fluid passing through the tube 2 and air passing through the corrugated fins 3.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a heater core (embodiment).

FIG. 2 is a perspective view of a heater core (embodiment).

FIG. 3 is a sectional view of a main part of a heater core (conventional form).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heater core 2 Tube 3 Corrugated fin 4 Core 5 Header 6 Side plate 11 Flange 12 Packing

Claims (1)

[Claims] A core formed by laminating a plurality of tubes having a fluid passage formed therein and a plurality of corrugated fins formed in a meandering wave shape; A pair of side plates each having a flange formed on a front edge and a rear edge, a front surface of a front edge flange of the side plate, and a packing for preventing air leakage arranged on a rear surface of a rear edge flange, In a heat exchanger that performs heat exchange between a fluid passing through the tube and air passing through the corrugated fin, a flange at a front edge of the side plate is located upstream of a front edge of the core in an air passing direction. The flange of the rear edge of the side plate is disposed downstream of the rear edge of the core in the air passing direction, and the front edge of the side plate and Heat exchanger song direction of the flange, characterized in that provided toward the core side at the edges.