JP2601367Y2 - Heat exchanger - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger such as a condenser used in an air conditioner for a vehicle.

[0002]

2. Description of the Related Art Conventionally, as a heat exchanger such as a condenser used in a vehicle air conditioner, there is one shown in FIGS. In this heat exchanger, a pair of headers 1 (1a, 1b), which are cylindrical members, are arranged side by side at a predetermined interval (see FIG. 7), and cut-out holes 2 are formed on the opposite wall surfaces at predetermined intervals in the longitudinal direction.
Are drilled. On the other hand, the flat tubes 3 and the fins 4 are alternately laminated, and both ends of each flat tube 3 are inserted into the cutout holes 2 and brazed. As shown in FIG. 6, a plurality of insertion holes 6 are formed in the outer peripheral surface of the header 1 by being cut out over a range of a semicircular portion. A partition plate 5 (5a, 5b, ...) is inserted into each insertion hole 6,
The internal space of the header 1 is divided by the partition plate 5.

In the heat exchanger, the heat transfer medium flowing into the upper portion of the header 1a is prevented from flowing downward by the partition plate 5a, and communicates with the internal space formed above the partition plate 5a. Flows into the first group 3a of each of the flat tubes 3 to be formed. Thereafter, the heat transfer medium flows into the header 1b on the opposite side, and is prevented from flowing downward by the partition plate 5b, and is formed below the first group 3a of the flat tubes 3 and above the partition plate 5b. Of each flat tube 3 communicating with the internal space
It flows into the group 3b. Hereinafter, similarly, the heat transfer medium flows while meandering in the header 1 and the flat tube 3.

[0004]

However, in the heat exchanger having the conventional structure, the partition plate 5 and the inner wall of the header 1 are perpendicular to each other, and when the heat transfer medium collides with the partition plate 5, a turbulent flow is generated. Since the flow resistance is increased due to the state, the fluid does not flow smoothly into the flat tube 2. In addition, the same can be said because the heat transfer medium flowing out of the flat tube 2 into the header 1 also collides with the inner wall of the header 1 and becomes turbulent. As a result, the pressure loss of the heat transfer medium increases and the flow velocity decreases, so that heat exchange between the heat transfer medium and the air passing outside the flat tube 3 cannot be performed efficiently. SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a heat exchanger capable of smoothly flowing a heat transfer medium between a tubular member and a flat tube to enhance thermal efficiency.

According to the present invention, in order to achieve the above object, notches are formed at predetermined intervals in a longitudinal direction in a pair of cylindrical members arranged side by side at predetermined intervals, while flat tubes and fins are alternately laminated. In the heat exchanger, both ends of each flat tube are inserted into the cutout holes of the tubular member and brazed, and the internal space of the tubular member is divided longitudinally by a partition plate. An insertion hole is formed in the cylindrical member, and the internal space of the cylindrical member is divided in the longitudinal direction by inserting the partition plate through the insertion hole. The flow direction changing wall surfaces facing the respective internal spaces are formed in a curved shape along the flow direction of the heat transfer medium between the tubular member and the flat tube near the partition plate.

[0006]

According to the above construction, when the heat transfer medium flows from the cylindrical member to the flat tube or from the flat tube to the cylindrical member, the flow direction is changed without difficulty by the flow direction changing wall surface. Flows smoothly without turbulence.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a part of a condenser which is a heat exchanger of a vehicle air conditioner. This capacitor is the same as the conventional example except for the shape of the partition plate 10 and the header 1 in the vicinity thereof, and the corresponding parts are denoted by the same reference numerals. That is, the edge of the insertion hole 11 formed in the outer wall surface of the header 1 is press-formed inward, so that the flow direction changing wall surface 12 is formed on the inner surface thereof as shown in FIG. Have been. This flow direction changing wall surface 12
Has a smooth curved surface shape so that the heat transfer medium flowing from above the header 1 smoothly flows into the flat tube 2 and the heat transfer medium flows out from the flat tube 2 into the header 1 smoothly. Further, the partition plate 10 which is inserted into the insertion hole and brazed is obtained by cutting a part of a circular plate-like body, and an arc portion abuts on an inner peripheral surface of the header 1 to divide the internal space, The cut portion fits into the insertion hole and closes it.

In the condenser, the heat transfer medium flowing into the header 1 flows along the flow direction changing wall surface 12 near the partition plate 10 and flows into the flat tube 2. The heat transfer medium flowing out of the flat tube 3 into the header 1 also flows along the flow direction changing wall surface 12 and flows out into the header 1. For this reason, the heat transfer medium does not become turbulent and does not easily receive flow resistance. Therefore, pressure loss is reduced, and the heat transfer medium flows smoothly while meandering through the header 1 and the flat tube 2, and flows through the fins 4 with air. Heat exchange is efficiently performed.

FIG. 3 shows a second embodiment. In this capacitor, the shape near the partition plate 14 is as follows. That is, the insertion hole 13 formed in the outer wall surface of the header 1 is formed in a substantially elliptical shape as shown in FIG. Then, the partition plate 1 inserted from the insertion hole 13
4 has a substantially triangular cross section. Thereby, a flow direction changing wall surface 15 similar to that of FIG. 1 is formed, and the heat transfer medium flows smoothly.

FIG. 5 shows a third embodiment. The insertion hole 16 formed in the outer wall surface of the header 1 is provided in the second embodiment.
As in the embodiment, as shown in FIG. On the other hand, the partition plate 1 inserted through the insertion hole 16
Numeral 7 has a substantially V-shaped cross section, and a flow direction changing wall surface 18 is formed on the inner space side of the header 1. This allows the heat transfer medium to flow smoothly by the flow direction changing wall surface 18 as in the case of FIG.

[0011]

As is apparent from the above description, according to the heat exchanger of the present invention, the heat transfer medium flowing between the flat tube and the cylindrical member smoothly flows in the flow direction by the flow direction changing wall surface. Will be changed. For this reason, the pressure loss of the heat transfer medium in the flat tube is reduced, and heat exchange between the heat transfer medium and the surrounding air is performed efficiently.

[Brief description of the drawings]

FIG. 1 is a partial sectional perspective view of a capacitor according to an embodiment.

FIG. 2 is a front sectional view of FIG.

FIG. 3 is a front sectional view of a capacitor according to a second embodiment.

FIG. 4 is a side view of the header of FIG. 3;

FIG. 5 is a front sectional view of a capacitor according to a third embodiment.

FIG. 6 is a partial cross-sectional perspective view of a capacitor according to a conventional example.

FIG. 7 is a front sectional view of FIG. 6;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Header (tubular member), 3 ... Flat tube, 4 ... Fin, 1
0, 14, 17 ... partition plate, 11, 13, 16 ... insertion hole,
12, 15, 18 ... Flow direction changing wall surfaces.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F28F 9/00-9/26 B60H 1/32

Claims (1)

(57) [Scope of request for utility model registration] 1. A pair of cylindrical members arranged side by side at a predetermined interval,
While notch holes are drilled at predetermined intervals in the longitudinal direction, flat tubes and fins are alternately laminated, and both ends of each flat tube are inserted into the notch holes of the tubular member and brazed, and In a heat exchanger in which an internal space of a cylindrical member is divided by a partition plate in a longitudinal direction, a pipe is formed by piercing an insertion hole in the cylindrical member and inserting the partition plate through the insertion hole. The internal space of the cylindrical member is divided in the longitudinal direction, the partition plate or the inner wall near the partition plate is formed, and the flow direction conversion wall surface facing each of the divided internal spaces is formed between the cylindrical member and the flat tube near the partition plate. A heat exchanger characterized in that the heat exchanger is formed in a curved shape along a flow direction of a heat transfer medium between the heat exchangers.