JP2548376Y2 - 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 radiator and, more particularly, to a heat exchanger capable of reducing the discharge of a coolant to the outside.

[0002]

2. Description of the Related Art Generally, a radiator such as that disclosed in Japanese Utility Model Laid-Open No. 2-92493 is disposed in an agricultural machine such as a car or a cultivator.

FIG. 4 shows a radiator of this type. In the figure, reference numeral 11 denotes a core for performing heat exchange, and the cores 11 are arranged at predetermined intervals in the vertical direction. A large number of tubes 17 and fins 19 are alternately arranged between a pair of seat plates 13 and 15.

The upper seat plate 13 has an inlet pipe 2
An upper tank 23 with an opening 1 is arranged, and a lower tank 27 with an outlet pipe 25 opened in the lower seat plate 15.

[0005] As shown in FIG.
A resin upper tank 23 is caulked and fixed via an O-ring 29. A cap 33 is disposed on a filler neck 31 formed on the upper surface of the upper tank 23, and an outlet pipe 3 is provided on a side face of the filler neck 31.
5 is open.

A cylindrical baffle 37 is formed at a position below the filler neck 31 of the upper tank 23. In the heat exchanger configured as described above, the high-temperature coolant (for example, LLC) flowing from the inlet pipe 21 into the upper tank 23 descends through the tube 17, is cooled in the core 11, and is cooled by the lower tank 2.
After flowing into 7, it flows out from outlet pipe 25.

In the above-described heat exchanger, since the cylindrical baffle portion 37 is arranged below the filler neck 31 of the upper tank 23, air bubbles accumulate in the baffle portion 37, and the heat is not provided in the reserve tank. In the exchanger, it is possible to reduce the discharge of the cooling liquid to the outside.

That is, in a normal automobile or the like, generally,
Although a reserve tank for temporarily storing the coolant expanded due to the rise in temperature is arranged outside the heat exchanger, for example, in a heat exchanger in which the reserve tank is not arranged as in a heat exchanger for agricultural equipment, When the cooling liquid thermally expands and the volume increases, the pressure in the upper tank 23 increases, the pressure valve 39 of the cap 33 is opened, and the cooling liquid is discharged from the outlet pipe 35 of the filler neck 31 to the outside. In the heat exchanger, since air bubbles accumulate in the baffle 37, when the pressure in the upper tank 23 becomes high, the air bubbles are discharged to the outside instead of the coolant, and the discharge of the coolant to the outside is effective. It becomes possible to reduce to.

[0009]

However, in such a conventional heat exchanger, the notch 40 for allowing the coolant to flow into the baffle 37 is simply formed in the baffle 37. There is a possibility that bubbles accumulated in the baffle portion 37 may flow out again due to the flow of the coolant, and when the flow of the coolant increases, the pressure acting on the cap 33 increases, and the pressure release valve of the cap 33 malfunctions due to malfunction. There is a problem that there is a risk of opening.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to provide a heat exchanger that can reliably collect bubbles in a baffle portion and prevent erroneous operation of a cap. And

[0011]

According to the heat exchanger of the present invention, a cap is arranged on the filler neck of the upper tank having an inlet pipe opened on one side and a filler neck formed on the upper surface. In a heat exchanger formed by projecting a cylindrical baffle part downward at a position below the filler neck, an outer cylindrical part is formed surrounding the baffle part, and the outer cylindrical part is formed. An outer notch is formed at a position on the inlet pipe side, and an inner notch is formed at a position opposite to the outer notch in the baffle portion.

[0012]

In the heat exchanger according to the present invention, the coolant flowing into the upper tank from the inlet pipe flows into the space between the outer cylindrical portion and the baffle portion from the outer cutout portion of the outer cylindrical portion, and the baffle Gas-liquid separation is performed while reaching the inner notch of the section, and the gas-liquid separated bubbles are accumulated in the baffle through the inner notch.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention; 1 and 2 show details of the upper tank of FIG. 3, and FIG. 3 shows an embodiment of the heat exchanger of the present invention.

In FIG. 3, reference numeral 41 designates a core portion for performing heat exchange. The core portion 41 is provided between a pair of seat plates 43 and 45 arranged at predetermined intervals in the vertical direction. The tubes 47 and the fins 49 are arranged alternately.

The upper seat plate 43 has an inlet pipe 5
An upper tank 53 with an opening 1 is arranged, and a lower tank 57 with an outlet pipe 55 opened in the lower seat plate 45.

On the upper seat plate 43, as shown in FIG.
A resin upper tank 53 is caulked and fixed via an O-ring 59. A cap 61 is disposed on the filler neck 55 formed on the upper surface of the upper tank 53.

The filler neck 5 of the upper tank 53
5, a cylindrical baffle 63 is formed integrally with the upper tank 53. In this embodiment, the outer cylindrical portion 65 is formed integrally with the upper tank 53 so as to surround the baffle portion 63.

The projecting length of the outer cylindrical portion 65 is shorter than the projecting length of the baffle portion 63 by a length L. An outer notch 67 is formed at a position of the outer tubular portion 65 on the inlet pipe 51 side, while an inner notch 69 is formed at a position of the baffle 63 opposite to the outer notch 67. ing.

The notch length from the tip of the inner notch 69 is longer than the notch length from the tip of the outer notch 67 by a length H. In the above-described heat exchanger, the high-temperature coolant flowing into the upper tank 53 from the inlet pipe 51 descends through the tube 47,
After being cooled in the core portion 41 and flowing into the lower tank 57, it flows out of the outlet pipe 55.

In the heat exchanger configured as described above, the outer tubular portion 65 is formed so as to surround the baffle portion 63, and the outer tubular portion 65 is located at a position on the inlet pipe 51 side. Forming an outer notch 67,
On the other hand, since the inner notch 69 is formed at a position opposite to the outer notch 67 in the baffle 63, air bubbles can be reliably stored in the baffle 63,
Erroneous operation of the cap 61 can be prevented.

That is, in the above-described heat exchanger, the coolant flowing into the upper tank 53 from the inlet pipe 51 flows from the outer notch 67 of the outer tubular portion 65 to the space between the outer tubular portion 65 and the baffle portion 63. , And gas-liquid separated while reaching the inner notch 69 of the baffle 63,
The gas bubbles separated from the gas are stored in the baffle portion 63 through the inner notch 69, so that the air bubbles can be reliably stored in the baffle portion 63.

The coolant flowing from the inlet pipe 51 into the upper tank 53 is directly supplied to the baffle 63
As a result, the pressure acting on the cap 61 does not become extremely large even when the flow of the cooling liquid becomes faster, and malfunction of the cap 61 can be prevented.

Further, in the above-described heat exchanger, the projecting length of the outer tubular portion 65 is shorter than the projecting length of the baffle portion 63 by the length L, so that the coolant directly collides with the lower portion of the baffle portion 63. The gas bubbles separated by the collision move to the space between the baffle portion 63 and the outer cylindrical portion 65, so that the air bubbles can be more reliably stored in the baffle portion 63.

Further, since the notch length from the tip of the inner notch 69 is longer than the notch length from the tip of the outer notch 67 by the length H, the length of the baffle 63 and the outer cylindrical portion 65 can be reduced. Air bubbles can be once stored in the space between them, and air bubbles can be more reliably stored in the baffle portion 63.

In the embodiment described above, an example in which the present invention is applied to a heat exchanger including the upper tank 53 and the lower tank 57 has been described. However, the present invention is not limited to such an embodiment. For example, the present invention can be applied to a heat exchanger such as a condenser type water cooling device in which the lower tank 57 is not disposed.

[0026]

As described above, according to the present invention, an outer cylindrical portion is formed surrounding the baffle portion, and an outer notch portion is formed at a position on the outer cylindrical portion on the inlet pipe side. On the other hand, since the inner notch was formed at a position opposite to the outer notch in the baffle part,
There is an advantage that air bubbles can be reliably stored in the baffle portion and malfunction of the cap can be prevented.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing details of a tank shown in FIG.

FIG. 2 is an end view taken along line II-II of FIG.

FIG. 3 is a front view showing one embodiment of the heat exchanger of the present invention.

FIG. 4 is a front view showing a conventional heat exchanger.

FIG. 5 is a cross-sectional view showing details of the tank shown in FIG. 4;

[Explanation of symbols]

 Reference Signs List 51 inlet pipe 53 upper tank 55 filler neck 61 cap 63 baffle part 65 outer cylindrical part 67 outer notch part 69 inner notch part

Claims (1)

(57) [Scope of request for utility model registration] 1. A cap (61) is arranged on the filler neck (55) of an upper tank (53) having an inlet pipe (51) opened on one side and a filler neck (55) formed on an upper surface thereof. (53) In a heat exchanger having a cylindrical baffle portion (63) projecting downward at a position below the filler neck (55) on the inner surface, an outer portion surrounding the baffle portion (63) is provided. Tubular part (6
5), and an outer cutout (67) is formed in the outer tubular portion (65) at a position on the inlet pipe (51) side, while the baffle portion (6) is formed.
A heat exchanger, wherein an inner cutout (69) is formed at a position opposite to the outer cutout (67) in 3).