JP2000045769A - Radiator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radiator of simple structure by which water can rapidly be injected without remaining air inside and the water can be drained rapidly and completely. SOLUTION: An inlet tank 14 connectable to one end of a radiator core 12 and comprising a fluid inlet 14b on its upper end, has the approximately triangular cross section of which the lower end side is expanded toward the connection side of the radiator core 12 from an upper end side. An outlet tank 16 connectable to the other end of the radiator core 12, having a fluid outlet 16b on its lower end and having a radiator cap 24 on its upper end has the approximately triangular cross section of which the upper end side is expanded toward the connection side of the radiator core 12 from the lower end side. The radiator core 12 is supported by the inlet tank 14 and the outlet tank 16 in such manner that the radiator core 12 on the outlet tank side 16 is higher than that on the inlet tank 14 side, and the air in a water tube 18 of the radiator core 12 is guided to the radiator cap 24.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radiator, and more particularly to an improvement in a radiator capable of reliably and easily injecting and discharging a fluid in a radiator of a type in which a fluid flows in a left-right direction.

[0002]

2. Description of the Related Art Conventionally, a cooling system for an automobile engine is mainly of a water-cooling type, in which water is circulated and cooled in a water jacket on an outer peripheral surface of a cylinder. The water heated by the cooling is guided to a radiator, cooled by a running wind or a cooling fan, and then returned to the water jacket to be used for cooling.

[0003] The radiator is composed of a plurality of thin water tubes in order to secure a wide heat radiation area, and efficiently cools guided water. Generally, radiators include a type in which water flows in the left-right direction (hereinafter, referred to as a cross-flow radiator) and a type in which water flows in the vertical direction (hereinafter, referred to as a vertical-flow radiator).

The cross-flow radiator generally has a long water tube disposed in the left-right direction, and the water tube itself is thin, so that the resistance in the water tube is large and it is difficult to flow. Therefore, for example, in Japanese Utility Model Laid-Open No. 4-10282, the resistance of water in the tank is reduced by making the cross-sectional shape of the tank to which the water tube is connected substantially triangular, and the water from the water jacket to the inlet tank is reduced. Inflow of
In addition, the water can smoothly flow out of the outlet tank via the water tube.

[0005]

However, when a circulating fluid (water) is injected into a conventional cross-flow radiator having a plurality of long and thin water tubes in the left-right direction, the inside of the water tube or the water tube and the inlet tank are not filled. In addition, air (bubbles) may remain in a connection portion with the outlet tank, a water jacket connected to the inlet tank or the outlet tank, or the like. Normally, the remaining air moves to a water inlet or an air discharging portion arranged at the highest position of the radiator and is discharged to the outside.However, as described above, in the case of a long and thin water tube extending substantially horizontally in the left-right direction. It was difficult to completely remove the air. If air remains, the temperature of that part locally rises and there is a risk of damage to members at that part, and sufficient air circulation is inhibited by air,
There is a problem that the radiator does not function properly.

Also, when water is injected into the radiator, since air remains, it is necessary to inject water while applying vibration or applying vibration, which causes a problem that the working time is long and complicated.

Further, when draining water for replacing the water of the radiator at the time of maintenance, it is difficult to completely remove the water from the long and thin water tube, and there is a problem that the working time is prolonged.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and has as its object to provide a simple water injection system capable of performing quick water injection without leaving air therein, and performing quick and complete drainage. It is to provide a radiator having a configuration.

[0009]

According to a first aspect of the present invention, there is provided a radiator for cooling by flowing a fluid in the left-right direction, wherein a plurality of water tubes in which the fluid flows are arranged in the left-right direction. A radiator core having a substantially rectangular outer shape, and a tank having a fluid inlet at an upper end connectable to one end of the radiator core,
An inlet tank having a substantially triangular cross-sectional shape in which the lower end of the tank expands from the upper end toward the connection side of the radiator core; and an air discharge outlet having a fluid outlet at the lower end which can be connected to the other end of the radiator core. And an outlet tank having a substantially inverted triangular cross section in which the upper end side of the tank is wider than the lower end side toward the connection side of the radiator core, and the inlet tank and the outlet tank, The radiator core is supported so that the outlet tank side is higher than the inlet tank side.

According to this configuration, it is possible to arrange the radiator core, which is normally arranged horizontally, with the outlet tank side higher. As a result, by arranging the water tube obliquely, the air remaining in the radiator can be easily led to the air discharge portion at the upper end of the outlet tank, and the air can be discharged outside the radiator.

In order to achieve the above object, the second invention is characterized in that, in the first invention, a connecting portion of the water tube protruding from the inlet tank and the outlet tank is also inclined along the water tube. And

According to this configuration, it is possible to easily prevent the air from remaining due to the inclination of the connecting portion of the water tube.

In order to achieve the above object, a third invention is characterized in that, in the first or second invention, a drain cock is provided at a lower end side of the inlet tank.

According to this structure, since the drain cock is located at the lowest position of the radiator core, the fluid inside the radiator core can be easily collected at the lower end of the inlet tank, and the fluid can be easily discharged to the outside of the radiator. Can be.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention (hereinafter referred to as embodiments) will be described below with reference to the drawings.

FIG. 1 is a schematic explanatory diagram for explaining the configuration of a radiator 10 according to the present embodiment. This radiator 10 is a so-called cross-flow radiator in which a cooling fluid, for example, water flows in the left-right direction.
The radiator 10 is provided with a radiator core 12 that actually cools the circulating water by the wind of a vehicle or the like equipped with the radiator 10 or the wind of a cooling fan, and an inlet tank 14 and an outlet tank that support the radiator core 12 from both sides. 16.

The radiator core 12 has a plurality of water tubes 18 formed by rolling a thin plate material into a cylindrical shape or a flat cylindrical shape in the left-right direction, similarly to a conventional horizontally placed radiator core. The core plate 2
0a, 20b support. Each water tube 18
As shown in FIG. 2, the water tube 18 is inserted into the opening 20c of the core plate 20a and fixed by a joining means such as brazing, and then connected to the core tube 20a (20b). The part is spread like a trumpet. In this manner, the flow of water to the elongated water tube 18 can be smoothly performed by widening the distal end portion. The radiator core 12
Is a frame 12 supporting the core plates 20a and 20b.
a maintains a substantially square shape. As shown in FIG. 2, corrugated corrugated fins 22 are joined to the outer wall surface of each water tube 18 by brazing or the like.
The heat radiation effect is improved by increasing the surface area of each water tube 18.

The present embodiment is characterized in that the radiator core 12 having a substantially square shape is provided with an inlet tank 14 having a substantially triangular cross section and an outlet tank 16 having a substantially inverted triangular cross section. The outlet tank 16 is supported to be higher than the outlet tank 16.

As shown in FIG. 1, the inlet tank 14
Has a substantially triangular cross section in which the lower end of the connection side of the radiator core 12 is wider than the upper end. That is, FIG.
In the inlet tank 14, the radiator core 1
It has a slanted outer wall surface 14a that is slanted rightward and upward on two sides. The inlet tank 14 has a fluid inlet 14b at the upper end. The fluid inlet 14b is connected to a hose that passes heated water that has passed through the water jacket on the engine side to the inlet tank 14.

On the other hand, the outlet tank 16 connected to the other side of the radiator core 12 has a substantially inverted triangular cross section in which the upper end is wider than the lower end of the connection side of the radiator core 12. That is, in FIG. 1, the outlet tank 16 has a slanted outer wall surface 16 a that is slanted downward and leftward on the radiator core 12 side. The outlet tank 16 has a fluid outlet 16b at the lower end. A hose for supplying cooled water to the water jacket on the engine side is connected to the fluid outlet 16b.

Accordingly, the inclined outer wall surface 14a of the inlet tank 14 and the inclined outer wall surface 16a of the outlet tank 16
Is connected to the radiator core 12, the radiator core 12 can be supported such that the outlet tank 16 side is higher than the inlet tank 14 side, and the entire radiator core 12 can be fixed at a predetermined angle (for example, 2 °).
５5 °) with respect to the horizontal plane. In the present embodiment, the inclined outer wall surface 14 a of the inlet tank 14 and the inclined outer wall surface 16
a is the inlet tank 14 and the outlet tank 1
6, the core plate 20a,
The inlet tank 14 and the outlet tank 1 which are substantially sealed (connected to the water jacket on the engine side) by covering the opening with 20b.
6 are formed.

As described above, by tilting the water tube 18 so that the outlet tank 16 side is higher than the inlet tank 14 side, the water tube 1 is tilted.
The air remaining in 8 can be easily guided to the upper end of outlet tank 16 by its own buoyancy. As shown in FIG. 2, when the pipe-shaped water tube 18 and the plate-shaped core plates 20a and 20b are joined by brazing or the like, a protruding connection portion indicated by reference symbol A is always formed. Since the connecting portion is also inclined obliquely, even if air remains between the connecting portion and the core plate 20a (20b), the amount can be reduced.

When water is injected into the cross-flow radiator 10 during maintenance or the like, the outlet tank 1
The operation is performed from the radiator cap 24 formed at the upper end of the nozzle 6, but since the water tube 18 is inclined, the air can be quickly removed. As a result, it is possible to smoothly perform the water injection, shorten the work time, and reliably remove the residual air.

The air discharged from the water tube 18 accumulates around the upper end (radiator cap 24) of the outlet tank 16 and then flows out of the fluid outlet 16
Although there is a possibility that the water will be caught in the water flow from b and be sucked into the water jacket side, since the volume at the upper end of the outlet tank 16 in which the air is stored is larger than the volume at the lower end, the flow rate of water at the upper end is reduced. It is possible to reduce the movement of the air,
Can be prevented from being sucked from. Further, the water tube 18 located at the lower stage near the fluid outlet 16b is most strongly affected by the suction of water from the fluid outlet 16b, but the volume on the lower end side of the inlet tank 14 is increased. The water flow resistance of the lower water tube 18 can be reduced, and the water can be smoothly circulated between the cross flow radiator 10 and the water jacket on the engine side without any load. By reducing the water flow resistance, the occurrence of cavitation can be suppressed, and damage to the constituent members can be reduced.

When a predetermined amount of air accumulates around the radiator cap 24, a sensor (not shown) detects the air and water is injected from a reservoir tank (not shown).
The accumulated air is discharged outside the radiator.

A drain cock 2 for draining water from the cross-flow radiator 10 at the time of maintenance or the like.
6 is desirably arranged at the lower end position of the inlet tank 14. Usually, it is difficult to discharge water in the horizontally arranged elongated water tube 18, but in the present embodiment, the radiator core 12 (water tube 18) is used.
Since the whole is tilted at a predetermined angle, it is possible to drain water from the water tube 18 by gravity without tilting or vibrating the entire cross-flow radiator 10 at the time of drainage, etc. And can be easily performed.

As shown in the present embodiment, the water tubes 18 disposed at right angles to the core plates 20a and 20b can be inclined by the shapes of the inlet tank 14 and the outlet tank 16, as in the prior art. Conventionally, the radiator core 12 of a horizontal type can be used to adapt to various types of radiators. That is, the adjustment of the one having a different inclination angle, the one having a different inclination direction (the arrangement of the fluid inflow / outlet ports 14b and 16b being reversed), and the like can be easily performed by the shapes of the inlet tank 14 and the outlet tank 16.

Further, in the inlet tank 14 and the outlet tank 16, the non-contact surface side of the radiator core 12 is formed substantially vertical, so that the silhouette of the radiator 10 including the radiator core 12 becomes substantially rectangular, and The radiator core 12 can be efficiently adhered to the formed rectangular cooling air intake, and can be supplied to the radiator core 12 efficiently.

[0029]

According to the present invention, the radiator core, which is normally arranged horizontally, is formed higher on the outlet tank side than on the inlet tank side by forming the inclined outer wall surface on the radiator core side of the inlet tank and the outlet tank. This makes it possible to arrange the water tube obliquely. As a result, the air remaining in the radiator is easily led to the air outlet at the upper end of the outlet tank,
The air can be easily discharged to the outside of the radiator.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram illustrating a configuration concept of a radiator according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram illustrating a water tube connecting portion of the radiator according to the embodiment of the present invention.

[Explanation of symbols]

10 radiator, 12 radiator core, 12a frame, 14 inlet tank, 14a, 16a inclined outer wall surface, 14b fluid inlet, 16 outlet tank, 16b fluid outlet, 18 water tube,
20a, 20b core plate, 24 radiator cap, 26 drain cock.

Claims (3)

[Claims] 1. A radiator for cooling by flowing a fluid in a left-right direction, comprising: a radiator core having a substantially rectangular outer shape in which a plurality of water tubes through which a fluid flows are arranged in a left-right direction; and a radiator core connectable to one end of the radiator core. An inlet tank having a fluid inlet at an upper end, wherein the lower end of the tank has a substantially triangular cross-sectional shape that extends from the upper end toward the connection side of the radiator core, and is connectable to the other end of the radiator core. A tank having a fluid outlet at a lower end and an air discharge portion at an upper end,
An outlet tank having a substantially inverted triangular cross section in which an upper end side of the tank is broader than a lower end side toward a connection side of the radiator core; and A radiator characterized by being supported so that the tank side is raised. 2. The radiator according to claim 1, wherein a connecting portion of the water tube protruding from the inlet tank and the outlet tank is also inclined along the water tube. 3. The radiator according to claim 1, wherein a drain cock is provided on a lower end side of the inlet tank.