JP2002038945A - Radiator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radiator capable of saving space by integrating a reservoir and the radiator. SOLUTION: The radiator 1 is of a horizontal flow type and is integrally provided with radiator tanks 2A and 2B, a heat radiating core 3 and the reservoir 8. An upper part of the radiator tank 2A and the reservoir 8 are connected via a shielding plate 9 with a formed hole 10 for air stay prevention. The reservoir 8 is provided on an upper side of the heat radiating core 3 and is disposed at the rear side of an upper rail where a radiator upper tank of a conventional vertical flow type radiator is disposed. As a result, space efficiency within an engine room can be improved. Since air stayed on the upper part of the radiator tank 2A is passed through the reservoir 8 via the hole 10 provided on the shielding plate 9, the radiator with excellent gas-liquid separating performance can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a radiator used for an engine cooling system of a vehicle or the like.

[0002]

2. Description of the Related Art In an engine cooling system of a vehicle, a radiator, which is a heat exchanger for cooling water, is disposed at a front portion of the vehicle where the traveling wind easily enters. Is located separately.

[0003]

However, since the radiator and the reserve tank are separate parts and are separately provided, a space for piping for connecting the two is required. Furthermore, a bracket and the like for fixing the reserve tank in the engine room were also required. for that reason,
This will increase costs, reduce space efficiency,
There was a problem that the number of assembly steps increased. In addition, a hose is generally used for the piping. For example, in the case of a pressurized reserve tank system, the reserve tank and the hose need to be pressure-resistant types, which increases costs.

An object of the present invention is to provide a radiator that can save space by integrating a reserve tank and a radiator.

[0005]

An embodiment of the present invention will be described with reference to FIGS. 1, 3 and 5. FIG. (1) Explained in association with FIG. 1 and FIG. 3, the invention of claim 1 is applied to a radiator 1 provided in an engine room of a vehicle and disposed behind a blow opening 36 of the engine room. A radiator core 3 disposed behind the blower opening 36; and an upstream radiator tank 2A integrally provided on one side of the radiator core 3 and through which cooling water flows from the engine.
And a downstream radiator tank 2 </ b> B integrally provided on the other side of the heat radiating core 3 and allowing the cooling water to flow out to the engine, and an engine room upper framework 30 provided above the ventilation opening 36.
The above-mentioned object is achieved by providing the upstream radiator tank 2A, the downstream radiator tank 2B, and the reserve tank 8 provided integrally with at least one of the heat radiation cores 3 provided behind the radiator tank 2A. (2) According to a second aspect of the present invention, in the radiator 1 according to the first aspect, the upper portion of the upstream-side radiator tank 2A and the reserve tank 8 are interposed via a shielding plate 9 in which an air retention preventing hole 10 is formed. It is a concatenation. (3) According to a third aspect of the present invention, in the radiator 1 according to the second aspect, the air stagnation preventing hole 10 is provided in a portion of the shielding plate 9 opposite to the heat radiation core 3. (4) Explaining in connection with FIG. 5, the invention according to claim 4 is the radiator according to any one of claims 1 to 3, wherein the bypass connecting portion 50 to which the coolant bypass path 51 is connected is provided. This is provided in the upstream radiator tank 2A.

[0006]

According to the present invention, the reserve tank is provided integrally with the radiator, and the reserve tank is disposed behind the upper frame of the engine room in which the conventional radiator upper tank is provided. With this arrangement, the storage space in the engine room can be reduced as compared with a conventional radiator having a separate reserve tank. Further, a bracket for fixing the reserve tank in the engine room and a hose for connecting the reserve tank and the radiator, which are conventionally required, are not required, so that cost can be reduced. According to the second aspect of the present invention, the air staying in the upper part of the upstream radiator tank escapes to the reserve tank through the air stay preventing hole provided in the shielding plate. Can be achieved.
According to the third aspect of the present invention, it is possible to mix air due to the inclination of the vehicle and to prevent accumulation of air during initial water injection. According to the invention of claim 4, gas-liquid separation can be achieved even when the thermostat in the cooling water circuit is closed at a low water temperature. In addition, air bleeding when replacing cooling water,
Since the operation can be performed even when the thermostat is closed, the air bleeding operation time can be reduced.

[0007] In the section of the means for solving the above-mentioned problems, which explains the configuration of the present invention, the drawings of the embodiments of the present invention are used to make the present invention easy to understand. However, the present invention is not limited to the embodiment.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a view showing an embodiment of a radiator according to the present invention, in which (a) is a perspective view,
(B) is a longitudinal sectional view of the radiator as viewed from the front of the vehicle. The radiator 1 is a radiator of a horizontal flow type, and the radiator 1 includes an upstream radiator tank 2A, a core 3 and a downstream radiator tank 2B from the right side in FIG.
It is arranged in the order of. The core portion 3 is provided with a plurality of cooling water tubes 4 that communicate the radiator tank portion 2A and the radiator tank portion 2B, and radiation fins 5 are provided between the cooling water tubes 4.

The radiator tank sections 2A and 2B are provided with hose connection sections 6 and 7, respectively, and the hose connection sections 6 and 7 are respectively connected to a cooling section jacket (not shown) of the engine by radiator hoses (not shown). ing.
As shown in FIG. 1B, a reserve tank portion 8 is formed integrally with the upper portion of the core portion 3, and a right end portion of the reserve tank portion 8 in communication with an upper end portion of the radiator tank portion 2B communicates therewith. I have. On the other hand, a shielding plate 9 is provided between the left end of the reserve tank 8 and the radiator tank 2A, and the radiator tank 2A and the reserve tank are provided near the left end of the shielding plate 9 (on the side of the radiator). A minute hole 10 communicating with the portion 8 is formed. Reserve tank 8
A cooling water inlet 11 is provided on the upper surface of the cooling water inlet 11, and a pressure cap 12 is attached to the cooling water inlet 11. 14 to 17 are bosses used when mounting the radiator 1 on a vehicle.

Next, the flow of cooling water in the radiator 1 will be described. The cooling water heated for cooling the engine is guided from the engine to the radiator 1 via a radiator hose (not shown), and flows into the radiator tank 2A from the hose connection 6. Radiator tank 2
The cooling water flowing into A flows through each cooling tube 4 as shown in FIG.
Flows from the left side to the right side, and flows into the radiator tank portion 2B. Cooling air flows through the core 3 from the front to the rear of the vehicle.
The temperature drops while flowing through. Radiator tank 2
The cooling water flowing from A into the radiator tank section 2B is supplied to a cooling jacket of the engine via a radiator hose from a hose connection section 7 provided at a lower portion of the radiator tank section 2B.

During the circulation of the cooling water, the gas in the engine cooling block and the air accumulated in the cooling system at the time of initial water injection flow into the radiator tank 2A together with the cooling water. These gases temporarily accumulate in the upper portion of the radiator tank portion 2A, but escape from the holes 10 formed in the shielding plate 9 into the reserve tank portion 8, thereby preventing the gas from remaining in the radiator tank portion 2A. can do. Reference numeral 13 in FIG. 1 indicates a liquid level of the cooling water. When the cooling water in the cooling system decreases, the water level decreases, and the cooling water in the reserve tank 8 is supplied to the radiator tank 2B.

The liquid level 13 of the cooling water in the reserve tank 8 is inclined right and left depending on the posture of the vehicle. However, since the minute hole 10 of the shield plate 9 is provided at the left end of the shield plate 9, the coolant hole 13 in the radiator tank 2A The cooling water is unlikely to flow into the reserve tank portion 8, and it is difficult for air to enter the radiator tank 2A or to stay in the air.

In the radiator 1 of this embodiment shown in FIG. 1, the radiator tanks 2A and 2B, the core 3 and the reserve tank 8 are made of an aluminum alloy, and brazing is used for joining them. FIG. 2 shows the reserve tank part 8 and the radiator tank parts 2A, 2
It is a figure explaining joining with B. The reserve tank 8 includes a tank body 20 and a lid 21. The lid 21 has an inlet 11, and holes 22 a and 22 are formed at both bottom ends of the tank body 20.
b are formed respectively. If the reserve tank portion 8 is mounted so that the upper portions of the radiator tank portions 2A, 2B are inserted into the holes 22a, 22b, the radiator tank portions 2A, 2B and the bottom of the tank body 20 are joined by brazing. .

Next, the reserve tank 8 and the radiator tank sections 2A and 2B are integrated by brazing the lid 21 to the tank body 20. When the cover 21 is brazed to the tank body 20, the bosses 24 a and 24 b formed on the tank body 20 are
a and 23b for positioning.

FIG. 3 is a diagram for explaining the mounting of the radiator 1 on a vehicle. The radiator 1 is attached to an upper rail 30 and a first cross 31, which are frame members at the front of the engine room. First, the mount rubber 34 is mounted on each of the bosses 14 to 17 provided on the upper surface of the reserve tank 8 and the lower portions of the radiator tanks 2A and 2B. Next, the radiator 1 is placed on the bracket 32 so that the boss of the mount rubber 34 attached to the bosses 16 and 17 is inserted into the hole of the bracket 32 provided on the first cloth 31. The bracket 32 on the radiator tank 2A side is not shown.

When the radiator 1 is mounted on the bracket 32, the boss of the mount rubber 34 attached to the bosses 41, 15 is inserted into the hole of the bracket 33.
The bracket 33 is attached to a stud bolt 37 provided on the upper rail 30. These brackets 33
Is fixed to the upper surface of the upper rail 30 by a nut 38. As described above, the radiator 1 includes the bracket 32,
33 is provided behind the upper rail 30 and the first cross 31. Then, connect the hoses 6,7
Is connected to a radiator hose 35.

FIG. 4A is a side view of a radiator 1 mounted on a vehicle, and FIG. 4B is a conventional radiator 4.
0 is a side view. In FIG. 4, the mounting rubber 34 and the brackets 32, 33 used for mounting the radiator are shown.
Is not shown. In the conventional radiator 40, the core 41
A radiator upper tank 42 and a radiator lower tank 43 are provided vertically. The radiator upper tank 42 and the radiator lower tank 43 correspond to the radiator tanks 2A and 2A of the present embodiment.
Radiator upper tank 4
The cooling water flows in the order of 2 → core 41 → radiator lower tank 43.

In the radiator 40, the core 4 serving as a heat radiating portion
1 is attached to the upper rail 30 and the first cloth 31 so as to be disposed behind the opening 36.
At this time, the radiator upper tank 42 is disposed behind the upper rail 30, and the radiator lower tank 43 is disposed behind the first cross 31. The radiator upper tank 42 is connected via a hose 44 to a separately provided reserve tank 45. This reserve tank 45 is fixed in the engine room by a bracket 46.

On the other hand, in the radiator 1 of the present embodiment,
Since the reserve tank section 8 is provided integrally above the core section 3, the reserve tank section 8 is disposed in the space behind the upper rail where the conventional radiator upper tank 42 is disposed. As a result, the space occupied by the conventional reserve tank 45 and the hose 44 is almost unnecessary, and the space can be saved. In addition, the bracket 46 which fixed the reserve tank 45 was used.
Further, since the hose 44 connecting the reserve tank 45 and the radiator 40 can be omitted, the cost can be reduced. In addition, since the reserve tank 8 is provided in the space behind the upper rail where the wind from the front of the vehicle does not easily hit, a reduction in the effective area of the core portion 3 can be suppressed.

FIG. 5 is a diagram showing a case where the radiator 1 is provided with a bypass path. In the first example shown in FIG. 5A, the upper part of the radiator tank 2A and the reserve tank 8 are enlarged laterally, and the bypass connection 50 is provided in the enlarged part of the radiator tank 2A. A bypass hose 51 constituting a bypass path is connected to the bypass connection part 50.

FIG. 6 is a diagram for explaining a bypass circuit, and is a block diagram schematically showing a cooling water circuit. 52
Is a cooling jacket of the engine 55, 53 is a thermostat, and 54 is a bypass path. The thermostat 53 has a function of turning on / off in accordance with the temperature of the cooling water and switching the flow direction of the cooling water. When the cooling water temperature is low immediately after the start, the thermostat 53 is turned off, the bypass path 54 and the cooling jacket 52 communicate, and the radiator 1 and the cooling water jacket 52 do not communicate. As a result, the cooling water circulates as indicated by arrow A. On the other hand, when the engine is sufficiently warm and the coolant temperature is high, the thermostat 53
Is turned on, the radiator 1 and the cooling jacket 52 are in communication, and the bypass path 54 and the cooling jacket 52 are not in communication. As a result, the cooling water flows inside the radiator 1, and the engine is cooled.

For example, in the example shown in FIG.
In the situation A, the cooling water flowing from the hose connection 6 into the radiator tank 2A is
, And flows to the cooling jacket 52 via the bypass hose 51. FIGS. 5B and 5C are diagrams showing other examples of the bypass path. In FIG. 5B, a tank 56 is provided above the radiator tank 2A, and the hose 56 and the bypass 50 are provided in the tank 56. In the example of FIG. 5C, the bottomed cylindrical member 57 is joined to the side surface of the radiator tank 2A, and the cylindrical member 57
Was provided with a bypass connection part 50. The tubular member 57 also serves as the hose connection portion 6 described above, and cooling water from the engine flows from the tubular member 57 into the radiator tank portion 2A through the notches 58 and 59.

By providing such a bypass connection portion 50 in the radiator tank portion 2A, the gas in the cooling water flowing into the radiator tank portion 2A from the hose connection portion 6 flows into the bypass hose 51 from the bypass connection portion 50. Before the gas is separated from the gas, the gas flows into the reserve tank 8 through the minute holes 10 of the shielding plate 9. Therefore, gas-liquid separation can be performed even when the thermostat is turned off at a low water temperature.
For example, air bleeding at the time of cooling water exchange can be performed without waiting until the thermostat is turned on, and the air bleeding operation time can be reduced.

Further, in order to check the amount of cooling water in the reserve tank section 8, a viewing window as shown in FIG. 7 may be provided on the lid 21 of the reserve tank section 8. FIG.
In the example of (a), a circular hole 74 is formed in the lid 21, and a window member 71 made of a transparent resin that functions as a viewing window is inserted into the hole 74. A sealing material 73 is provided between the flange portion 71 b of the window member 71 and the lid 21, and the insertion portion 71
a is deformed by heat caulking or the like to cover the window material 71 with the cover 2.
Fix to 1.

In the example shown in FIG. 7B, a screw hole 75 is formed in the lid 21 and the transparent resin window member 7 is formed in the screw hole 75.
The window member 72 is fixed to the lid 21 by screwing the screw portion 72 a provided on the cover 2. In this case, since the inside of the tank is pressurized, the window member 72 is screwed from the inside of the tank. As in the case of FIG.
A seal member 73 is provided between the flange portion 71b and the lid 21.

In the example shown in FIG. 7C, in addition to the window member 72, a liquid level checking means 77 is provided in the reserve tank 8 at a position facing the window member 72. The liquid level checking means 77 is a step having surfaces H and L having different heights, and can check the approximate position of the liquid surface depending on whether the surfaces H and L are above or below the liquid surface. The height of the surface H is higher than the surface L. For example, when both the surface H and the surface L are visible, the liquid level is lower than the surface L. In such a case, the cooling water is supplied. Replenish the reserve tank unit 8. When only the higher surface H is visible, it is determined that the cooling water is an appropriate amount. Furthermore, when both the surface H and the surface L cannot be seen, it can be determined that the amount of cooling water is larger than an appropriate amount. As described above, by providing the step 77 in the reserve tank section 8, the liquid level of the cooling water can be easily confirmed.

<< Modification >> A radiator 80 shown in FIG. 8 is a modification of the radiator 1 described above, and a reserve tank portion 81 is different. The radiator tank portion 81 of the radiator 80 includes a resin tank body 81a and an aluminum alloy bottom plate portion 81b. The tank main body 81 has a semi-cylindrical shape in consideration of pressure resistance, and is provided with a transparent resin window member 82 for checking the liquid level. The window member 82 is provided with scale lines indicating a high position and a low position of the liquid level.

Holes 83a, 83 formed in bottom plate portion 81b
The radiator tank portions 2A, 2B are inserted into the respective b, and the radiator tank portions 2A, 2B and the bottom plate portion 81b are joined by brazing. Thereafter, the tank body 81a and the bottom plate portion 81b are joined by caulking to be integrated. The radiator 80 shown in FIG.
Since the radiator 1 is provided integrally, the same effect as the radiator 1 can be obtained.

In the correspondence between the embodiment described above and the elements in the claims, the upper rail 30 constitutes the upper frame of the engine room, and the bypass hose 51 constitutes the coolant bypass path.

[Brief description of the drawings]

FIG. 1 is a view showing an embodiment of a radiator according to the present invention, wherein (a) is a perspective view and (b) is a longitudinal sectional view of the radiator 1 as viewed from the front of a vehicle.

FIG. 2 is a diagram illustrating joining of a reserve tank portion 8 to radiator tank portions 2A and 2B by brazing.

FIG. 3 is a diagram for explaining attachment of the radiator 1 to a vehicle.

4A and 4B are side views of a radiator attached to a vehicle, wherein FIG. 4A shows a case of a radiator 1 and FIG. 4B shows a case of a conventional radiator 40;

FIG. 5 is a view showing a bypass connection part, where (a) is a first connection part;
(B) shows a second example, and (c) shows a third example.

FIG. 6 is a block diagram illustrating a bypass circuit.

FIG. 7 is a diagram showing a means for checking the amount of cooling water,
(A) is a figure explaining the 1st example of a viewing window, (b) is a 2nd example of a viewing window, (c) is a figure explaining step 77.

FIG. 8 is a diagram showing a modification of the radiator shown in FIG.

[Explanation of symbols]

 1, 40, 80 radiator 2A, 2B radiator tank part 3 heat radiation core part 8, 81 reserve tank part 9 shielding plate 10 hole 30 upper rail 50 bypass connection part

Claims (4)

[Claims] 1. A radiator provided in an engine room of a vehicle and disposed behind a ventilation opening of the engine room, a radiator core disposed behind the ventilation opening, and one side of the radiation core. An upstream radiator tank that is provided integrally with the cooling water and flows in from the engine; a downstream radiator tank that is provided integrally with the other side of the heat radiation core and that discharges the cooling water to the engine; and A radiator, which is provided behind an upper frame provided in an engine room and includes a reserve tank integrally provided with at least one of the upstream radiator tank, the downstream radiator tank, and the heat radiation core. 2. The radiator according to claim 1, wherein an upper portion of the upstream radiator tank and the reserve tank are connected via a shield plate having a hole for preventing air from remaining. . 3. The radiator according to claim 2, wherein the air stagnation preventing hole is provided in a portion of the shielding plate opposite to the heat radiation core. 4. The radiator according to claim 1, wherein a bypass connection part to which a coolant bypass path is connected is provided in the upstream-side radiator tank.