JPH06211034A - Cooling device for vehicle - Google Patents

Abstract

PURPOSE:To provide a vehicular cooling device of such constitution as to prevent the blow-back of hot air in an engine room to a specific place in an idling stop state or the like. CONSTITUTION:A cooling device for a vehicle has a radiator 1 for radiating the heat of vehicle engine cooling water; an air-conditioning condenser 3 having the radiating face larger than that of the radiator 1 and installed with the radiating face partially overlapped with the radiating face of the radiator 1; a first cooling fan 5 for cooling both radiating faces of the radiator 1 and condenser 1 installed in the overlapped state; a second cooling fan 7 for cooling only the radiating face of the condenser 3; and a vehicle speed detecting means 9. The cooling device is further provided with a water temperature detecting means 11 for detecting the temperature of engine cooling water, and a control means 13 for controlling the first and second cooling fans 5, 7 according to the detected information of the vehicle speed detecting means 9 and water temperature detecting means 11. In the case of the vehicle speed detecting means 9 detecting the vehicle speed to be the specified value or lower and the water temperature detecting means 11 detecting the cooling water temperature to be the specified value or higher, the second cooling fan 7 is put in action.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle cooling device for cooling the heat radiating surfaces of a radiator for radiating heat of engine cooling water and a condenser for air conditioning.

[0002]

2. Description of the Related Art An engine may be mounted horizontally in an engine room of a vehicle. Since the engine room can be downsized by mounting the engine horizontally, it is often used in front-wheel drive vehicles and relatively small vehicles.

In recent years, most vehicles are equipped with an air conditioner, and as shown in FIG. 9, a condenser 101, which is a radiator for an air conditioner, is a radiator, which is a radiator for engine cooling water. Bumper 1 on 103
It is arranged inside 05 and in front of the engine 107. Then, a controller (not shown) relates to information on vehicle speed V [Km / hour] which is the speed of the vehicle, on / off information of an automatic air conditioner switch (hereinafter referred to as A / C), and water temperature T [° C.] of cooling water of the engine 107. Information has been entered, and the radiator fan 109 is
And controlling the operation of the condenser fan 111.

For example, as shown in FIG. 8, the vehicle speed V is 20
When A / C is on at less than [Km / hour], the radiator fan 109 and the condenser fan 111 are turned on regardless of the value of the water temperature T. In addition, the vehicle speed V is 20 [Km /
If the A / C is off at less than [hour], the water temperature T is 100.
When the temperature is lower than [° C], the radiator fan 109 and the condenser fan 111 are turned off, and when the water temperature T is 100 [° C] or higher, the radiator fan 109 is turned on and the condenser fan 111 is turned off.

FIG. 9 shows that when the A / C is on, the radiator fan 109 and the condenser fan 111 are both on.
The figure shows a case where the heat radiating surfaces of the radiator 103 and the capacitor 101 are forcibly cooled.

[0006]

However, as is clear from FIG. 8, when the vehicle speed V is less than 20 [Km / hour], the A / C ratio is reduced.
When turned off, the condenser fan 111 remains off even if the value of the water temperature T is 100 [° C.] or higher. In this way, when the radiator fan 109 is turned on and the condenser fan 111 is turned off so that only one fan rotates, as shown in FIGS.
The engine 10 with the hot air HB passing through it installed horizontally
7 is bounced off and blown back from the gap between the headlamp 113a and the engine hood. As a result, the headlamp 1
The hot air HB hits the radiator grill part 115 near 13a, and the temperature of that part rises.

As a countermeasure for this, the radiator 103
It is possible to lower the absolute level of the coolant temperature T of the engine cooling water by increasing the heat dissipation surface of the radiator 103 to improve the heat dissipation ability of the radiator 103, but there is a problem that the cost is increased.

As another measure, the headlamp 11
It is possible to install an insulator in the gap between 3a and the engine hood to prevent the hot air HB from being blown back to the radiator grille portion 115, but this has not been a fundamental solution.

The present invention has been made in view of the above problems, and prevents the hot air from being blown back to a specific place in the engine room in an idling stopped state or a low speed running state without increasing the cost. An object of the present invention is to provide a cooling device for a vehicle.

[0010]

As shown in FIG. 1, the means provided by the present invention for attaining the above-mentioned object includes a radiator 1 for radiating heat of engine cooling water of a vehicle, and a radiator surface of the radiator 1. A first air-conditioning capacitor 3 having a wide heat dissipation surface, a part of which is placed on the heat dissipation surface of the radiator 1 to cool the heat dissipation surfaces of both the radiator 1 and the capacitor 3 placed on top of each other. Cooling fan 5 of
A second cooling fan 7 for cooling only the heat radiation surface of the condenser 3 and a vehicle speed detecting means 9 for detecting the speed of the vehicle.
And a water temperature detecting means 11 for detecting the temperature of the engine cooling water, and a control means for controlling the first and second cooling fans 5, 7 according to the detection information of the vehicle speed detecting means 9 and the water temperature detecting means 11. When the vehicle speed detecting means 9 detects that the vehicle speed is lower than a predetermined speed and the water temperature detecting means 11 detects a temperature higher than a predetermined speed, the control means 13 is adapted to operate the second cooling fan 7.

[0011]

According to the present invention, the radiator 1 for radiating the heat of the engine cooling water of the vehicle and the heat radiating surface of the air-conditioning condenser 3 are partially overlapped with each other, and both the heat radiating surfaces are cooled. A first cooling fan 5 for cooling the condenser 3 and a second cooling fan 7 for cooling only the heat radiation surface of the capacitor 3 are provided. Further, the control means 13 is the vehicle speed detection means 9
And the first and second cooling fans 5 and 7 according to the detection information of the water temperature detecting means 11, and the vehicle speed detecting means 9 detects that the speed is lower than a predetermined speed, and the water temperature detecting means. When it is detected that the temperature of 11 is equal to or higher than the predetermined temperature, the second cooling fan 7 is operated.

For this reason, it is possible to prevent the hot air from the engine room from being blown back to a specific location when the vehicle is idling or is running at a low speed.

Further, since it is possible to prevent the hot air from being blown back to a specific place without using special parts, it is possible to suppress an increase in cost.

[0014]

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

First, the configuration will be described with reference to FIGS.

As shown in FIG. 3, a water-cooled engine 17 is horizontally installed in the engine room of the vehicle 15. A radiator 19 that radiates the heat of the cooling water of the engine 17 and a condenser 21 for air conditioning are arranged in front of the engine 17 and inside the bumper 23.
The capacitor 21 has a heat dissipation surface wider than the heat dissipation surface of the radiator 19, and a part of the heat dissipation surface is placed so as to overlap the heat dissipation surface of the radiator 19. A radiator fan 25 is arranged at a position facing both heat radiation surfaces of the radiator 19 and the capacitor 21 which are overlapped with each other. This radiator fan 2
5 is turned on when the temperature of the cooling water of the engine 17 rises above the set temperature.

The radiator fan 25 and the condenser fan 27 are driven by a radiator fan motor 25a and a condenser fan motor 27a, respectively.

The radiator fan 25 is a first cooling fan, and is driven by a radiator fan motor 25a when the radiator fan 25 is on. Then, the radiator fan 25 sucks in the air in front, so that the heat radiating surfaces of both the radiator 19 and the condenser 21 are forcibly cooled by the flow of the air.

A condenser fan 27 is arranged at a position facing the heat radiation surface of the condenser 21. The condenser fan 27 is a second cooling fan, and is driven by the condenser fan motor 27a when the condenser fan 27 is on. Then, when the condenser fan 27 sucks in the air in the front direction, only the heat radiation surface of the condenser 21 is forcibly cooled by the flow of the air.

As shown in FIG. 2, a controller 31 is provided at an appropriate position such as a console box of the vehicle 15. An auto air conditioner switch (not shown) is provided on the front panel or the like. Further, the water temperature detecting means for detecting the temperature of the cooling water of the engine 17 and the vehicle 1
An appropriate sensor such as a vehicle speed detecting means for detecting the speed of No. 5 is provided. An A / C signal which is ON / OFF information of the auto air conditioner switch, a water temperature signal from the water temperature detecting means, and a vehicle speed signal from the vehicle speed detecting means are input to the input terminal of the controller 31. The output terminal of the controller 31 is connected to the coils 35c and 37c of the relays 35 and 37,
The contacts 35a and 37a of the relays 35 and 37 are connected to the radiator fan 25 and the condenser fan 27.

The controller 31, which is a control means, has a built-in microcomputer or the like, and executes various arithmetic processes according to the detection information of the vehicle speed detection means and the water temperature detection means to control the relays 35 and 37. , And controls the operations of the radiator fan 25 and the condenser fan 27.

Based on the input water temperature signal, the controller 31 determines that the engine cooling water temperature is higher than a predetermined value, for example, 100.
When it is determined that the temperature is equal to or higher than [° C.] and that the speed is less than or equal to a predetermined value, for example, less than 20 [Km / hour] based on the vehicle speed signal, the condenser fan 27 is operated via the relay 37. To operate.

Next, the operation will be described.

First, the control processing relating to the main routine of the controller 31 will be described with reference to FIG.

In step S1, the A / C signal which is the on / off information of the automatic air conditioner switch is read. Subsequently, in step S3, information relating to the water temperature T [° C.] of the cooling water of the engine 17 is read. In step S5, information relating to the vehicle speed V [Km / hour] which is the speed of the vehicle 15 is read. Step S
In 7, the control process for starting or stopping the radiator fan 25 is executed. In step S9, control processing for starting or stopping the condenser fan 27 is executed.

Next, the control process for starting and stopping the radiator fan 25 in step S7 will be described in detail with reference to FIGS. 5 and 7.

In step S11, the vehicle speed V of the vehicle 15 is 8
It is determined whether the vehicle speed V is 0 [Km / hour] or more, and if the vehicle speed V is 80 [Km / hour] or more, the process proceeds to step S13. In step S13, it is determined whether or not the water temperature T of the cooling water is less than 97 [° C]. If it is determined that the water temperature T is less than 97 [° C], the process proceeds to step S15 and the radiator fan 25 is turned off. .

In step S11, the vehicle speed V is 80 [Km /
If it is determined that it is less than [hour], the process proceeds to step S17. In step S17, it is determined whether the A / C is on. If it is determined that the A / C is on, the process proceeds to step S23 regardless of the value of the water temperature T, and the radiator fan 25 is turned on.

If it is determined in step S17 that the A / C is off, the process proceeds to step S19. Step S19
Then, the vehicle speed V is 20 [Km / hour] or more and 80 [Km
/ Hour], the vehicle speed V is 2
When it is determined that it is 0 [Km / hour] or more and less than 80 [Km / hour], the process proceeds to the above-described step S13, and the value of the cooling water temperature T is determined.

When it is determined that the vehicle speed V is less than 20 [Km / hour], steps S11 to S are performed.
It progresses to step S21 via 17-step S19.
In step S21, it is determined whether the water temperature T of the cooling water is less than 100 [° C], and the water temperature T is 100 [° C].
If it is determined that it is less than this, the process proceeds to step S15, and the radiator fan 25 is turned off. Also, step S2
When it is determined in 1 that the water temperature T of the cooling water is 100 [° C.] or higher, the process proceeds to step S23, and the radiator fan 25 is turned on.

Next, the control process for starting and stopping the condenser fan 27 in step S9 will be described in detail with reference to FIGS. 6 and 7.

In step S25, it is determined whether the A / C is on. If it is determined that the A / C is on, the process proceeds to step S27 regardless of the value of the water temperature T to turn on the condenser fan 27. . A in step S25
If it is determined that / C is off, the process proceeds to step S29.

In step S29, the vehicle speed V is 20 [Km /
The vehicle speed V is 20
When it is determined that it is equal to or more than [Km / hour], the process proceeds to step S33 regardless of the value of the water temperature T, and the condenser fan 27 is turned off. That is, the vehicle speed V is 20 [Km / hour].
When the vehicle is in the medium to high speed running state and the auto air conditioner switch is off, the condenser fan 27 is turned off. At this time, when the value of the water temperature T is equal to or lower than the predetermined set temperature, the above-described subroutine (step S11 to step S13 to step S15) shown in FIG. 5 or (step S11 to step S17 to step S19).
-The radiator fan 25 is turned off by step S13-step S15).

As described above, when the vehicle is running, the radiator fan 25 may be turned on and the condenser fan 27 may be turned off to rotate only one fan. Passes through the condenser 21 from the front grille, so that there is no inconvenience that hot air in the engine room is blown back to a specific location.

In step S29, the vehicle speed V is 20 [K
m / hour], it is determined in step S3.
Go to 1. In step S31, the water temperature T is 100.
It is judged whether the temperature is higher than [℃], and the water temperature T is 1
When it is determined that the temperature is less than 00 [° C], step S
Proceeding to 33, the condenser fan 27 is turned off. Further, when it is determined in step S31 that the water temperature T is 100 [° C.] or higher, that is, the vehicle speed V is in the low speed running state of less than 20 [Km / hour] or in the idling state, and the water temperature T of the engine cooling water is If the temperature is 100 [° C.] or higher, the process proceeds to step S27 and the condenser fan 27 is turned on.

As described above, the vehicle speed V is 20 [Km / hour].
When the engine cooling water temperature T is 100 [° C.] or more when the vehicle is running at a low speed or idling at less than 100 ° C., both the radiator fan 25 and the condenser fan 27 are turned on regardless of whether the auto air conditioner switch is on or off. Therefore, it is possible to prevent the hot air in the engine room from being blown back to a specific place. As a result, the temperature of the corresponding component can be lowered as compared with the conventional example.

Further, since it is possible to prevent the hot air from being blown back to a specific place without using special parts, it is possible to suppress an increase in cost.

[0038]

As described above, according to the present invention, when the vehicle speed detecting means detects that the speed is lower than the predetermined speed and the water temperature detecting means detects that the temperature is higher than the predetermined temperature, Since the second cooling fan is configured to operate, there is an effect that it is possible to prevent the hot air in the engine room from being blown back to a specific location while suppressing an increase in cost.

[Brief description of drawings]

FIG. 1 is a diagram corresponding to a complaint.

FIG. 2 is a circuit block diagram of an embodiment according to the present invention.

FIG. 3 is a layout configuration diagram of an embodiment according to the present invention.

FIG. 4 is a flowchart showing a control process of a main routine of the controller according to the embodiment of the present invention.

FIG. 5 is a flowchart showing a subroutine relating to control of a radiator fan according to an embodiment of the present invention.

FIG. 6 is a flowchart showing a subroutine relating to control of a condenser fan according to an embodiment of the present invention.

FIG. 7 is an explanatory diagram showing various conditions relating to the operation of the radiator fan and the condenser fan of the embodiment according to the present invention.

FIG. 8 is an explanatory diagram showing various conditions relating to operations of a conventional radiator fan and condenser fan.

FIG. 9 is a layout configuration diagram of a conventional example.

FIG. 10 is a plan view showing an operation of a conventional example.

FIG. 11 is a front view showing the operation of the conventional example.

[Explanation of symbols]

 1 Radiator 3 Condenser 5 First Cooling Fan 7 Second Cooling Fan 9 Vehicle Speed Detection Means 11 Water Temperature Detection Means 13 Control Means

Claims (1)

[Claims] 1. A radiator for radiating heat of engine cooling water of a vehicle, and a heat radiating surface wider than a heat radiating surface of the radiator, a part of which is placed over the heat radiating surface of the radiator for air conditioning. A first cooling fan that cools the heat radiation surfaces of both the radiator and the capacitor that are placed in a stack, a second cooling fan that cools only the heat radiation surface of the capacitor, and a vehicle speed detector that detects the speed of the vehicle. Means, water temperature detection means for detecting the temperature of the engine cooling water, and control means for controlling the first and second cooling fans according to the detection information of the vehicle speed detection means and the water temperature detection means, When the vehicle speed detecting means detects that the speed is lower than or equal to a predetermined speed and the water temperature detecting means detects that the temperature is higher than or equal to the predetermined speed, the control means operates the second cooling fan. Vehicular cooling device is characterized in that so as to create.