JPH1178544A - Cooling system for electric vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a radiator and a condenser to be arranged laterally, and thus reduce the liquid temperature of the radiator without causing an increase in the number of part items and the man-hours for assembly operation. SOLUTION: A condenser 12 is arranged between the extension parts 2A, 3A of the upper tank 2 and the lower tank 3 of a radiator 1, and the radiator 1 is integrally laterally assembled to the condenser 12. Thus, the radiator 1 can be constantly and directly ventilated by the outside air to realize the reduction in liquid temperature, and since the radiator 1 and the condenser 12 can be composed as one cooling unit, the increase in the number of mounting parts items and the man-hours for assembly operation does not occur.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a cooling device for an electric vehicle.

[0002]

2. Description of the Related Art In an electric vehicle, a radiator is required to cool various electric and electronic parts such as a driving motor mounted in a motor room, similarly to a vehicle equipped with an engine. It has a layout similar to that of a car, that is, an arrangement in which a condenser of an air conditioner is mounted on the front side of a motor room and a radiator is mounted on the rear side of the condenser.

[0003]

Since the allowable temperature of electric and electronic components mounted in the motor room is lower than that of the engine, the temperature of the radiator must be lower than the temperature of the radiator of the engine-equipped vehicle. is there.

However, in the above-described tandem layout of the condenser and the radiator, warm air that has passed through the condenser passes through the radiator. Therefore, it is necessary to increase the capacity of the radiator in order to lower the liquid temperature.

[0005] Further, in an electric vehicle, the charging port of the battery is often set in a front grill or the like, and when the condenser and the radiator are arranged in tandem as described above, there is a space for installing a charging function component behind the front grill. If the capacity of the radiator is increased as described above for the purpose of lowering the liquid temperature of the radiator as described above, the space is further narrowed, and the layout of the charging function components on the back of the front grill becomes difficult. Would.

On the other hand, while the engine is mounted, for example, FIG.
As shown in the figure, a condenser 24 which is connected to the evaporator 20, the compressor 21, the liquid tank 23 and the like by piping at the front side of the engine rooms E and R to form a refrigeration cycle.
A radiator 25 is disposed on the side of the
And the radiator 25 are arranged in rows in the vehicle width direction. Therefore, it is conceivable to apply the structure of this row arrangement to an electric vehicle as it is. The arrangement structure originally requires a large number of brackets and support parts for mounting each of the condenser 24 and the radiator 25 to a vehicle-side member such as a radiator core support panel (not shown). The number of work steps is increased, which is disadvantageous in cost.

Accordingly, the present invention provides a cooling device for an electric vehicle that enables a horizontal arrangement of a radiator and a condenser without increasing the number of parts and the number of assembling operations, thereby realizing a reduction in the temperature of the radiator. Is what you do.

[0008]

According to the first aspect of the present invention, the upper tank and the lower tank of the radiator provided on the front side of the motor room are each provided with an extending portion extending in one direction. The condenser of the air conditioner is arranged between these extending portions, and the radiator and the condenser are integrally assembled in a row.

According to a second aspect of the present invention, in the capacitor according to the first aspect, the extension portions of the upper tank and the lower tank of the radiator are provided via header pipes vertically arranged on both sides of the capacitor core. It is characterized by being connected to.

According to the third aspect of the present invention,
The upper tank has an extended portion formed with a reservoir portion bulging upward.

[0011]

According to the first aspect of the present invention, the condenser of the air conditioner is disposed between the extending portions of the upper tank and the lower tank of the radiator, and the radiator and the condenser are integrally assembled in a row. Therefore, the cooling efficiency of the radiator can be increased, and the liquid temperature can be reduced.

In addition, since the radiator and the condenser are integrally assembled in a horizontal row to constitute one cooling unit, the number of mounting parts for mounting the cooling unit on the front side of the motor room and the number of working steps are increased. It can be obtained cost-effectively without any.

Further, since the radiator has an extended portion formed in each of the upper tank and the lower tank, the required capacity of the radiator can be secured without difficulty in structure and layout.

According to the invention described in claim 2, according to claim 1,
In addition to the effects of the invention, the capacitors are connected to the radiator upper tank and the lower tank extension parts via header pipes arranged vertically on both sides of the capacitor core. Is connected in the cross direction of the frame members of the upper and lower tanks and the pair of header pipes, so that the rigidity of the cooling unit can be significantly increased without using a reinforcing member.

Further, the side plate of the radiator only needs to be provided on one side opposite to the side on which the condenser is arranged, and as described above, the rigidity of the cooling unit is high, so that the side plate can be made thinner and cost is reduced. And weight advantages.

According to the third aspect of the present invention, in addition to the effects of the first and second aspects of the present invention, an upwardly swelling reservoir portion is formed in the extension of the radiator upper tank. Since the reservoir tank itself is provided with a function as a reservoir tank, a separately provided reservoir tank can be reduced in size, or the reservoir tank itself can be eliminated.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings.

1 and 2, reference numeral 1 denotes a motor room M.
A radiator disposed on the front side of the R; an upper tank 2 having a radiator cap 5 and a lower tank 3
And a radiator core 4 provided between the upper and lower tanks 2 and 3.

The upper tank 2 and the lower tank 3 are formed with extending portions 2A and 3A extending to one side, respectively.

An inlet 6 opening to the back is formed near the end of the extension 2A of the upper tank 2, while an outlet 7 opening to the back is formed near the end of the extension 3A of the lower tank 3. And these inlets 6,
A radiator pipe 8 is connected to each of the outlets 7.

In the present embodiment, a reservoir portion 9 bulging upward is formed in the extension 2A of the upper tank 2.

A condenser 12 of the air conditioner is disposed between the extending portions 2A, 3A of the upper tank 2 and the lower tank 3 adjacent to the radiator core 4, and the radiator 1 and the condenser 12 are integrated in a row. 1
One cooling unit.

The condenser 12 is constituted by arranging header pipes 14 and 15 on both sides of a condenser core 13 in a vertical direction. An inlet 16 and an outlet opening to the back are provided at the upper and lower ends of one of the header pipes 14. And a refrigerant pipe (not shown) connected to the inlet 16 and the outlet 17.

The condenser 12 has upper and lower ends of the pair of header pipes 14 and 15 butted to the upper tank 2 of the radiator 1 and the extending parts 2A and 3A of the lower tank 3 at right angles, and is welded or brazed. Are joined by the joining means.

In the drawing, reference numeral 10 denotes a reservoir cap provided on one side of the upper wall of the reservoir section 9, and reference numeral 11 denotes a side plate provided on the side of the radiator 1 opposite to the side where the capacitors are arranged.

According to the structure of the above embodiment, the condenser 12 of the air conditioner is connected to the upper tank 2 of the radiator 1.
Also, since the radiator 1 and the condenser 12 are integrally assembled in a row in a row between the extending portions 2A, 3A of the lower tank 3, the outside air can always be directly passed through the radiator core 4. The cooling efficiency of the radiator 1 can be increased, so that the radiator liquid temperature can be lowered to a low temperature suitable for cooling various electric and electronic components mounted in the motor rooms MR.

In addition, since the radiator 1 and the condenser 12 are integrally assembled in a row so as to constitute one cooling unit, when the motor room MR is mounted on the front side, the conventional radiator is used. Alternatively, similarly to the condenser, for example, the upper and lower sides of the cooling unit can be attached to the radiator core support panel (not shown), and the cost can be advantageously obtained because there is no increase in the number of attachment parts and work steps. it can.

Further, since the radiator 1 has the extended portions 2A and 3A formed in the upper tank 2 and the lower tank 3, respectively, the required capacity of the radiator 1 can be secured without difficulty in structure and layout.

In particular, in the present embodiment, a reservoir portion 9 bulging upward is formed in the extension 2A of the upper tank 2, and the upper tank 2 itself has a function as a reservoir tank. A dedicated reservoir tank can be dispensed with, or even if a reservoir tank is provided depending on the specification, the reservoir tank can be downsized and the mounting layout in the motor room M / R can be simplified. .

Further, the capacitor 12 is a capacitor core 1
3, header pipes 14, 1 arranged vertically on both sides
5, the upper and lower ends of the header pipes 14 and 15 are connected to the upper tank 2 and the extension parts 2A and 3 of the lower tank 3 respectively.
A, the radiator 1 and the condenser 12 are connected to the upper and lower tanks 2 and 3 at right angles to each other.
And the pair of header pipes 14 and 15 are connected in the cross direction of the frame members, so that the rigidity of the cooling unit can be significantly increased without using a dedicated reinforcing member.

Further, since the capacitor 12 is integrally mounted on one side of the radiator 1, the side plate 11 of the radiator 1 only needs to be provided on one side opposite to the side where the capacitors are arranged. As described above, the rigidity of the cooling unit is high, so that the side plate 11 can be made thinner, which can be advantageously obtained in terms of cost and weight.

In the illustrated example, the radiator core 4 has a width substantially equal to 1/3 of the capacitor core 13, but it is a matter of course that the radiator core 4 can be changed in any manner according to the specifications.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is an exemplary perspective view showing a vehicle-mounted state of the embodiment;

FIG. 3 is a perspective view showing a conventional arrangement structure example.

[Description of Signs] 1 Radiator 2 Upper tank 2A Extension 3 Lower tank 3A Extension 9 Reservoir 12 Capacitor 13 Capacitor core 14, 15 Header pipe

Claims (3)

[Claims] 1. A radiator upper tank and a lower tank provided at a front side of a motor room are provided with respective extending portions extending in one direction, and a condenser of an air conditioner is arranged between these extending portions. A cooling device for an electric vehicle, wherein a radiator and a condenser are integrally assembled in a row. 2. The electric device according to claim 1, wherein the capacitor is connected to each of the extended portions of the upper tank and the lower tank of the radiator via header pipes vertically arranged on both sides of the capacitor core. Automotive cooling system. 3. The cooling device for an electric vehicle according to claim 1, wherein a reservoir portion bulging upward is formed in an extension of the upper tank of the radiator.