JP2003054250A - Vehicular cooling fan control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular cooling fan control device capable of properly controlling a cooling fan in response to the operational condition of an air conditioner by properly grasping the operational condition without providing a coolant pressure detector and the like in the air conditioner. SOLUTION: A load value operating means to operate an air conditioning load value Tao based on an outside temperature Ta, a room temperature Tr, a quantity of solar radiation Ts, and a set temperature Tset is provided, and the cooling fan 12 is controlled based on the air conditioning load value Tao, the cooling water temperature Tw of an engine 2, and the vehicle speed V of a vehicle.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle cooling fan control device for controlling a cooling fan capable of cooling a radiator for engine cooling water and a condenser of an air conditioner.

[0002]

2. Description of the Related Art Generally, in a vehicle equipped with an air conditioner, a cooling fan (electric motor fan) is installed to cool a radiator for cooling engine cooling water installed in an engine room and a condenser of the air conditioner. It is arranged.

A large amount of electric current is required for the operation of this cooling fan, and if the cooling fan continues to rotate at a high speed, it is not preferable not only in terms of power consumption but also in terms of noise countermeasures.
Therefore, for example, as described in Japanese Patent Laid-Open No. 2000-274243, a refrigerant pressure detector is provided to detect the discharge pressure of the compressor, and the vehicle speed as the vehicle operating state and the discharge as the operating state of the air conditioner are detected. The applicant of the present invention discloses that the rotation speed of the cooling fan is controlled in accordance with the pressure to save the power consumption of the auxiliary machinery and reduce the noise of the cooling fan.

[0004]

However, in the vehicle cooling fan control device, since the refrigerant pressure detector is provided to detect the discharge pressure as the operating condition of the air conditioner, the device becomes complicated, and the device becomes complicated. There is a problem that the reliability of the device decreases and the manufacturing cost of the device increases. Further, since the refrigerant pressure detector is installed in the engine room of the vehicle, the layout of the wiring and the like in the engine room is limited, and the degree of freedom in designing in the engine room is significantly reduced.

The present invention has been made in view of the above circumstances, and an object of the present invention is to accurately grasp the operating state of an air conditioner without providing a refrigerant pressure detector of the air conditioner and the like. It is an object of the present invention to provide a vehicle cooling fan control device capable of appropriately controlling a cooling fan according to the operating state of.

[0006]

In order to achieve the above object, in the invention according to claim 1, a vehicle operating state detecting means for detecting an operating state of the vehicle and an air conditioning operating state for detecting an operating state of an in-vehicle air conditioner are provided. A detection unit, a radiator for cooling the engine cooling water, and a cooling fan capable of cooling the condenser of the air conditioner based on a preset rotation condition corresponding to the vehicle operating state and the operating state of the air conditioner. In a vehicle cooling fan control device including a fan control unit that variably controls the number of revolutions, the vehicle operation state detection unit detects the engine cooling water temperature and the vehicle speed of the vehicle as the vehicle operation state. The air-conditioning operation state detection means is configured to detect the outside air temperature and the indoor temperature in the vehicle, the amount of solar radiation in the vehicle, and the air-conditioning operation provided in the vehicle. Setting a temperature set by part, the it is one that detects a working state of the air conditioner,
An air conditioning load value as the operating state of the air conditioner is calculated based on the outside air temperature, the indoor temperature, the amount of solar radiation, and the set temperature set by the air conditioning operation unit provided in the vehicle. The fan control means controls the cooling fan based on the air conditioning load value calculated by the load value calculation means, the engine cooling water temperature, and the vehicle speed. It is characterized by

According to the first aspect of the invention, the air conditioning load value is calculated from the outside air temperature, the room temperature, the amount of solar radiation, and the set temperature. The rotation speed of the cooling fan is controlled by grasping the state. Further, since the rotation speed of the cooling fan is controlled based on the air conditioning load value, the cooling water temperature, and the vehicle speed, the minimum necessary optimum cooling fan corresponding to the vehicle operating state and the air conditioner operating state is provided. Is realized.

Therefore, it is possible to appropriately control the cooling fan according to the operating state of the air conditioner without providing a refrigerant pressure detector or the like in the air conditioner. Further, it is possible to reduce the power consumption of the auxiliary machinery, reduce noise and vibration due to the cooling fan, and improve the reliability and durability of the cooling fan.

According to a second aspect of the present invention, in the vehicle cooling fan control device according to the first aspect, the air conditioning operating state detecting means detects the engine intake air temperature as an operating state of the air conditioning system. The fan control means controls the cooling fan based on the engine intake air temperature, the air conditioning load value calculated by the load value calculation means, the engine cooling water temperature, and the vehicle speed. And

According to the second aspect of the present invention, in addition to the operation of the first aspect, the rotation speed of the cooling fan is controlled based on the engine intake air temperature as well. The minimum required optimum cooling fan operation is realized.

Therefore, the rotation speed of the cooling fan can be controlled more closely according to the operating condition of the engine, the power consumption of the auxiliary machinery and the noise and vibration of the cooling fan can be reduced, and the cooling fan can be further operated. It is possible to improve reliability and durability.

According to a third aspect of the present invention, in the vehicle cooling fan control device according to the second aspect, a total load value calculation for calculating a total air conditioning load value based on the engine intake air temperature and the air conditioning load value is performed. The fan control means controls the cooling fan based on the total air conditioning load value calculated by the total load value calculation means, the engine cooling water temperature, and the vehicle speed. And

According to the third aspect of the present invention, in addition to the function of the second aspect, the total air conditioning load value is calculated from the engine intake air temperature and the air conditioning load value. The rotation speed of the cooling fan is controlled by grasping the operating state of the air conditioner. Also, since the cooling fan speed is controlled based on the total air conditioning load value, the engine cooling water temperature, and the vehicle speed, the minimum required air conditioning load value is added based on the engine operating condition. The optimum cooling fan operation is achieved.

Therefore, the rotational speed of the cooling fan can be efficiently controlled in consideration of the operating condition of the engine by the limited parameters such as the total air conditioning load value, the engine cooling water temperature, the vehicle speed, etc. It is possible to improve the reliability and durability of the cooling fan by reducing the power consumption of auxiliary machinery and reducing noise and vibration due to the cooling fan.

According to a fourth aspect of the present invention, vehicle operating state detecting means for detecting the operating state of the vehicle, air conditioning operating state detecting means for detecting the operating state of the vehicle-mounted air conditioner, the vehicle operating state and the air conditioner are detected. And a fan control means for variably controlling the number of rotations of a cooling fan capable of cooling the radiator for cooling the engine cooling water and the condenser of the air conditioner, based on a preset rotation condition corresponding to the operating state. In the vehicle cooling fan control device, the vehicle operating state detecting means detects the engine cooling water temperature and the vehicle speed of the vehicle as the vehicle operating state, and the air conditioning operating state detecting means, Detecting the outside air temperature in the vehicle as an operating state of the air conditioner, wherein the fan control means includes the outside air temperature and the engine cooling water. A degree, a vehicle speed, and controls the cooling fan on the basis of.

According to the fourth aspect of the present invention, the outside air temperature is detected by the air-conditioning operation state detecting means. Therefore, the rotation speed of the cooling fan is controlled by grasping the operation state of the air conditioner based on the outside air temperature. It Further, since the rotation speed of the cooling fan is controlled based on the outside air temperature, the engine cooling water temperature, and the vehicle speed, the minimum necessary optimum cooling fan corresponding to the vehicle operating state and the air conditioner operating state is provided. Is realized.

Therefore, it is possible to appropriately control the cooling fan according to the operating state of the air conditioner without providing a refrigerant pressure detector or the like in the air conditioner. Further, it is possible to reduce the power consumption of the auxiliary machinery, reduce noise and vibration due to the cooling fan, and improve the reliability and durability of the cooling fan.

According to a fifth aspect of the present invention, in the vehicle cooling fan control device according to the fourth aspect, the air conditioning operating state detecting means detects an engine intake air temperature as an operating state of the air conditioning system. The fan control means may control the cooling fan based on the engine intake air temperature, the outside air temperature, the engine cooling water temperature, and the vehicle speed.

According to the invention of claim 5, in addition to the operation of claim 4, the rotation speed of the cooling fan is controlled on the basis of the engine intake air temperature as well, so that the engine operating condition is further improved. The minimum required optimum cooling fan operation is realized.

Therefore, the rotation speed of the cooling fan can be controlled more closely according to the operating condition of the engine, and the power consumption of the auxiliary machinery and the noise and vibration due to the cooling fan can be reduced, and the cooling fan can be further operated. It is possible to improve reliability and durability.

According to the invention of claim 6, in addition to the operation of claim 5, the total air conditioning load value is calculated from the engine intake air temperature and the outside air temperature. The rotation speed of the cooling fan is controlled by grasping the operating state of the device. Also, since the cooling fan speed is controlled based on the total air conditioning load value, the engine cooling water temperature, and the vehicle speed, the minimum required air conditioning load value is added based on the engine operating condition. The optimum cooling fan operation is achieved.

Therefore, the limited number of parameters such as the total air conditioning load value, the engine cooling water temperature, the vehicle speed, etc. can be used to efficiently control the rotation speed of the cooling fan in consideration of the operating condition of the engine. It is possible to improve the reliability and durability of the cooling fan by reducing the power consumption of auxiliary machinery and reducing noise and vibration due to the cooling fan.

According to a seventh aspect of the invention, vehicle operating state detecting means for detecting the operating state of the vehicle, air conditioning operating state detecting means for detecting the operating state of the vehicle-mounted air conditioner, and the vehicle operating state and the air conditioner And a fan control means for variably controlling the number of rotations of a cooling fan capable of cooling the radiator for cooling the engine cooling water and the condenser of the air conditioner, based on a preset rotation condition corresponding to the operating state. In the vehicle cooling fan control device, the vehicle operating state detecting means detects the engine cooling water temperature and the vehicle speed of the vehicle as the vehicle operating state, and the air conditioner operating state detecting means. For detecting an engine intake air temperature of the vehicle as an operating state of the air conditioner, wherein the fan control means is configured to detect the engine intake air temperature and And engine coolant temperature, and the vehicle speed, and controls the cooling fan on the basis of.

According to the seventh aspect of the present invention, since the engine intake air temperature is detected by the air conditioning operation state detecting means, the operating state of the air conditioner is grasped by the engine intake air temperature to determine the rotation speed of the cooling fan. Controlled. Further, since the cooling fan speed is controlled based on the engine intake air temperature, the engine cooling water temperature, and the vehicle speed,
The minimum required optimum operation of the cooling fan corresponding to the vehicle operating state and the air conditioner operating state is realized.

Therefore, it is possible to appropriately control the cooling fan according to the operating state of the air conditioner without providing a refrigerant pressure detector or the like in the air conditioner. Further, it is possible to reduce the power consumption of the auxiliary machinery, reduce noise and vibration due to the cooling fan, and improve the reliability and durability of the cooling fan.

[0026]

1 to 5 show a first embodiment of the present invention. FIG. 1 is a schematic explanatory view showing the arrangement of an air conditioner in an engine room of a vehicle, and FIG. 2 is an air conditioner. FIG. 3 is a schematic block diagram of a vehicle cooling fan control device.

As shown in FIGS. 1 and 2, in the engine room of the vehicle 1, a compressor 3 driven by the engine 2 to compress the refrigerant, a condenser 4 for exchanging heat between the outside air and the refrigerant, and a refrigerant gas. A receiver 5 that performs liquid separation, an expansion valve 6 that adiabatically expands the refrigerant, and an evaporator 7 that performs heat exchange between the air blown into the vehicle interior and the refrigerant are provided. Here, the compressor 3,
The condenser 4, the receiver 5, the expansion valve 6, and the evaporator 7 are connected in this order by a refrigerant pipe 8 to form a refrigeration cycle of the air conditioner 9.

Cooling water for cooling is circulated in the engine 2, and heat is exchanged between the outside air and the cooling water by the radiator 10. As shown in FIG. 1, the radiator 10 is located behind the front grill in the engine room.
It is installed in parallel with the capacitor 4. In the vicinity of the radiator 10, a radiator fan 11 that cools the radiator 10 by ventilation and a cooling fan 12 that cools the condenser 4 and the radiator 10 by ventilation are provided. That is, by the cooling air from the radiator fan 11, the cooling air from the cooling fan 12, the traveling air flowing from the front grill,
When the ventilation volume of the radiator 10 increases, the heat exchange efficiency of the radiator 10 improves.

The compressor 3 includes a rotatable pulley 3a to which the driving force of the engine 2 is transmitted via a belt, and a clutch 3 capable of transmitting the rotational force of the pulley 3a to the refrigerant compression section.
b. That is, when the engine 2 is driven, the pulley 3a is steadily rotating, the refrigerant is compressed by the compressor 3 when the clutch 3b is in the power-engaged state, and the compressor 3 when the clutch 3b is in the power-disengaged state. The compression of the refrigerant due to stops.

The condenser 4 is arranged immediately before the radiator 10 and exchanges heat between the outside air and the refrigerant. That is, when the amount of ventilation of the condenser 4 is increased by the cooling air from the cooling fan 12, the traveling air flowing from the front grill, etc., the heat exchange efficiency of the condenser 4 is improved.

The evaporator 7 is installed inside a cooling unit 13 provided inside the vehicle 1. That is, the air that has undergone heat exchange in the cooling unit 13 is blown into the vehicle interior to adjust the air inside the vehicle interior. Here, the cooling unit 13 includes a blower unit that adjusts the amount of air blown into the vehicle interior,
An inside / outside air shutter section that switches the air blown into the vehicle compartment between the inside air circulation and the outside air, a temperature control shutter section that adjusts the amount of air ventilated to the evaporator 7, and a motor shutter that switches the ventilation port when the air is blown into the vehicle compartment. The blower section and each shutter section are connected to the vehicle cooling fan control device 14, respectively.

The radiator fan 11 is connected to the vehicle cooling fan control device 14 so that the number of revolutions is controlled according to the load state of the engine 2. Further, the cooling fan 12 is connected to the vehicle cooling fan control device 14, and the rotation speed is controlled according to the load states of the engine 2 and the air conditioner 9.

As shown in FIG. 2, the vehicle cooling fan control device 14 includes an interface section 14a as a vehicle operating state detecting means and an air conditioning operating state detecting means.
The interface portion 14a is connected to the clutch 3b of the compressor 3, the radiator fan 11 and the cooling fan 12, and the cooling water temperature T of the engine 2 is connected to the interface portion 14a.
A water temperature sensor 15 for detecting w, an intake air temperature sensor 16 for detecting an intake air temperature Ti of the engine 2, a vehicle speed sensor 17 for detecting a vehicle speed V of the vehicle 1, and an outside air sensor 18 for detecting an outside air temperature Ta of the vehicle 1. The inside air sensor 19 for detecting the indoor temperature Tr of the vehicle 1, the insolation sensor 20 for detecting the insolation amount Ts of the vehicle 1, the air conditioner switch 21 provided on the instrument panel of the vehicle 1, and set by the driver or the like. It is connected to the air conditioning operating unit 22 for setting the temperature Tset. Here, the cooling water temperature T
The w and the vehicle speed V indicate the operating state of the vehicle 1, and the outside air temperature Ta, the indoor temperature Tr, the solar radiation amount Ts, and the set temperature Tse.
t indicates the operating state of the air conditioner 9. Further, the vehicle cooling fan control device 14 has a fan control means, a calculation section 14b as a load value calculation means, and a storage section 14c, and the storage section 14c has a load value calculation program 14d.
The air conditioning load value Tao, the fan control table X1,
The fan control program 14e is stored.

The load value calculation program 14d is a program for calculating the air conditioning load value Tao based on the outside air temperature Ta, the indoor temperature Tr, the amount of solar radiation Ts, and the set temperature Tset. Specifically, Tao = A × Ta + B × Tr + C × T
The air conditioning load value Tao is obtained from the equation s + D × Tset + E. Here, A, B, C, D, and E are constants preset according to the vehicle type and the like. In the present embodiment, the air conditioning load value Tao is a required blowout temperature at the ventilation port in the vehicle compartment, and is a value indicating the air conditioning load in the vehicle 1. That is, as shown in FIG. 3, the air conditioning load on the vehicle 1 increases when the air conditioning load value Tao increases, and the air conditioning load on the vehicle 1 decreases when the air conditioning load value Tao decreases. In the present embodiment, the air-conditioning load value Tao is calculated to determine the selection of ventilation ports for blowing air into the vehicle compartment, the amount of air blown, and the like so that the air conditioning in the vehicle compartment is automatically performed. It has become.

As shown in FIG. 5, the fan control table X
1 is the vehicle speed V of the vehicle 1 and the cooling water temperature Tw of the engine 2.
And the intake air temperature Ti of the engine 2 and the ON of the clutch 3b
OFF, that is, whether or not the compressor 3 is driven, and the air conditioning load value Tao, which are created in advance by the respective parameters. In the present embodiment, the cooling fans 12 are in the OFF state, which is the stopped state,
The fan control table X1 is controlled so as to be in the LO state which is a low rotation state and the HI state which is a high rotation state, and the control state of the cooling fan 12 is assigned to the fan control table X1 corresponding to the value of each parameter. That is, the rotation condition of the cooling fan 12 is preset corresponding to the operating state of the vehicle 1 and the operating state of the air conditioner 9.

As shown in FIG. 5, the vehicle speed V is 0.
-19 (km / h) as the first vehicle speed condition V1, 20-69
(Km / h) as the second vehicle speed condition V2, 70 to 104 (km
/ H) is the third vehicle speed condition V3, 105- (km / h) is the fourth vehicle speed condition V4, and is divided into four conditions.
Further, the vehicle speed conditions V1, V2, V3 and V4 are set to the clutch 3
It is divided into two conditions depending on ON / OFF of b.
Furthermore, when the clutch 3b is in the ON state, it is divided into two conditions: a low load value condition Tao1 where the air conditioning load value Tao is small and a high load value condition Tao0 where the air conditioning load value Tao is large. That is, the total of 12 conditions are divided according to the vehicle speed V, ON / OFF of the clutch 3b, and air conditioning load value Tao. In the present embodiment, as shown in FIG. 4, when the air conditioning load value Tao exceeds the set value corresponding to the high load value condition, the high load value condition Tao0 is set, and the set value corresponding to the low load value condition is set. When it is less than, the low load value condition Tao1 is set.

Further, as shown in FIG. 5, the cooling water temperature Tw
Regarding the first cooling water condition Tw1 and the second cooling water condition T
It is divided into three conditions of w2 and third cooling water condition Tw3. Here, when the cooling water temperature Tw rises and reaches 90 ° C., the condition changes from the first cooling water condition to the second cooling water condition, and when it reaches 96 ° C., the second cooling water condition changes to the third cooling water condition.
It is changing to cooling water conditions. When the cooling water temperature Tw drops to 90 ° C., the third cooling water condition is changed to the second cooling water condition, and when the cooling water temperature Tw reaches 87 ° C., the second cooling water condition is changed to the first cooling water condition. Is changing to. Then, the fan control table X1 has 36 conditions in total, which is a combination of the condition divided into 12 by the vehicle speed V, the clutch 3b and the air conditioning load value Tao, and the condition divided into 3 by the cooling water temperature Tw. Has been created. The OFF, LO, and HI states of the cooling fan 12 are assigned to the respective conditions of the fan control table X1.

Here, in the fan control table X1, when the vehicle speed V is high, the amount of ventilation of the condenser 4 increases and the heat exchange efficiency improves, so that the first vehicle speed condition V1, the second vehicle speed condition V2, and the third vehicle speed. Condition V3, fourth vehicle speed condition V4,
The control state of the cooling fan 12 is assigned so that the amount of air flow to the condenser 4 by the cooling fan 12 is reduced.

When the clutch 3b is in the ON state,
Since the load on the air conditioner 9 is increased, the clutch 3b becomes O
The control state of the cooling fan 12 is assigned such that the ventilation amount in the condenser 4 is increased as compared with the case of the FF state.

Further, when the air conditioning load value Tao is in the high load value condition Tao0, the load on the refrigeration cycle of the air conditioner 9 is increased, so that the ventilation amount in the condenser 4 is larger than in the low load value condition Tao1. The control state of the cooling fan 12 is assigned so that

Furthermore, when the cooling water temperature Tw is high, the load on the engine 2 is increasing. Therefore, the first cooling water condition Tw1, the second cooling water condition Tw2, and the third cooling water condition Tw3 are set in this order. The control state of the cooling fan 12 is allocated so that the ventilation amount in the radiator 10 increases.

The fan control program 14e is an air conditioning load value Ta obtained by executing the load value calculation program 14d.
It is a program for controlling the cooling fan 12 according to the fan control table X1 based on o, the cooling water temperature Tw, and the vehicle speed V.

The operation of the cooling fan control device 14 for a vehicle configured as described above when controlling the rotation speed of the cooling fan 12 will be described.

First, the load value calculation program 14d is executed to calculate the air conditioning load value Tao based on the outside air temperature Ta, the indoor temperature Tr, the amount of solar radiation Ts, and the set temperature Tset.
Then, the fan control program 14e is executed, and the rotation speed of the cooling fan 12 is controlled so that the cooling fan 12 is controlled in accordance with the air conditioning load value Tao, the cooling water temperature Tw, and the vehicle speed V in the fan control table X1. To control. That is, the rotation speed of the cooling fan 12 is determined by taking into consideration the operating state of the air conditioner 9 by the air conditioning load value Tao, the operating state of the engine 2 by the cooling water temperature Tw, and the ventilation state of the traveling wind of the condenser 4 and radiator 10 by the vehicle speed V. To control.

As described above, according to the vehicle cooling fan control device 14 of the present embodiment, the outside air temperature Ta and the indoor temperature T.
Since the air conditioning load value Tao is calculated from r, the amount of solar radiation Ts, and the set temperature Tset, and the rotation speed of the cooling fan 12 is controlled based on the air conditioning load value Tao, the air conditioning load value Tao is adjusted. The rotation speed of the cooling fan 12 is controlled by grasping the operating state of the cooling fan 9. Therefore, the cooling fan 12 can be appropriately controlled according to the operating state of the air conditioner 9 without providing a refrigerant pressure detector or the like in the cooling cycle.

Further, according to the vehicle cooling fan control device 14 of the present embodiment, the air conditioning load value Tao and the cooling water temperature T
Since the rotation speed of the cooling fan 12 is controlled on the basis of w, the vehicle speed V, and ON / OFF of the clutch 3b, the cooling fan 12 is operated in the operating state of the vehicle 1 and the air conditioner 9
The minimum required optimum operation of the cooling fan 12 corresponding to the operating state of is realized. Therefore, it is possible to reduce the power consumption of the auxiliary machines, reduce noise and vibration due to the cooling fan 12, and improve the reliability and durability of the cooling fan 12.

Although the fan control table X1 corresponding to the cooling fan 12 is shown in the above embodiment, a fan control table is also created for the radiator fan 11, and the radiator fan 11 and the cooling fan 12 are linked. You may make it control by. In this case, when the load of the engine 2 is large and the load of the air conditioner 9 is small, it is only necessary to operate the radiator fan 11, so that finer control of the rotation speed of each fan 11, 12 is realized. It

Further, in the above embodiment, the vehicle speed V has four conditions V1 to V4, the cooling water temperature Tw has three conditions Tw1 to Tw3, and the air conditioning load value Tao.
For high load value condition Tao0 and low load value condition Ta
ON / OF for the two conditions of o1 and the clutch 3b
Although the fan control table X1 is created from the two conditions of F, the number of each condition of the fan control table may be any number.

In the above embodiment, the stopped state (OFF), the low rotation state (LO), the high rotation state (HI).
In the above three states, the number of rotations of the cooling fan 12 is variably controlled. However, for example, a middle rotation state is set between a low rotation state and a high rotation state, or a stop state and a low rotation state are set. A finer control may be performed by setting an extremely low rotation state during the period.

In the above embodiment, the vehicle speed V,
Cooling water temperature Tw, air conditioning load value Tao, O of clutch 3b
Although the fan control table X1 created from N / OFF is shown, the condition of the intake air temperature Ti may be further added to the fan control table X1. In this case, engine 2
It is possible to operate the minimum required optimum cooling fan that is even better suited to the operating conditions of. Therefore, it is possible to further reduce the power consumption of the auxiliary machinery and reduce the noise and vibration due to the cooling fan, and further improve the reliability and durability of the cooling fan.

In the above embodiment, the operating condition of the air conditioner 9 is grasped by the air conditioning load value Tao, but the operating condition of the air conditioner 9 may be grasped by the outside air temperature Ta. For example, as shown in FIG. 6, three conditions are created according to the detected outside air temperature Ta, and the air conditioning load value Ta is set in the fan control table X1 described above.
The condition at the outside air temperature Ta may be added instead of the condition at o. As a result, the outside air temperature Ta around the vehicle 1
It is possible to control the cooling fan 12 according to the above. Therefore,
This also makes it possible to appropriately control the cooling fan 12 according to the operating state of the air conditioner 9 without providing a refrigerant pressure detector or the like in the cooling cycle. Further, it is possible to reduce the power consumption of the auxiliary machines, reduce noise and vibration due to the cooling fan 12, and improve the reliability and durability of the cooling fan 12.

In the above embodiment, the operating condition of the air conditioner 9 is grasped by the air conditioning load value Tao, but the operating condition of the air conditioner 9 may be grasped by the intake air temperature Ti. For example, as shown in FIG. 7, two conditions are created according to the detected intake air temperature Ti, and the air conditioning load value Ta is set in the fan control table X1 described above.
The condition for the intake air temperature Ti may be added instead of the condition for o. As a result, the cooling fan 12 can be controlled according to the operating state of the engine 2, that is, the amount of heat radiated from the engine 2 into the engine room. Therefore, also by this, it is possible to appropriately control the cooling fan 12 according to the operating state of the air conditioner 9 without providing a refrigerant pressure detector or the like in the cooling cycle. Further, it is possible to reduce the power consumption of the auxiliary machines, reduce noise and vibration due to the cooling fan 12, and improve the reliability and durability of the cooling fan 12.

Further, the intake air temperature Ti and the outside air temperature Ta
You may make it grasp | ascertain the operating state of the air conditioner 9 by both. In this case, the above-mentioned fan control table X1
Is not the condition at the air conditioning load value Tao, but the intake air temperature T
The conditions of both i and the outside air temperature Ta are added. As a result, the cooling fan 12 can be controlled according to the outside air temperature Ta around the vehicle 1 and the operating state of the engine 2.

8 and 9 show a second embodiment of the present invention, and FIG. 8 is a schematic block diagram of an air conditioner and a vehicle cooling fan controller. In the second embodiment, the configuration of the vehicle cooling fan control device is different from that of the first embodiment, and hereinafter, the same reference numerals as those in the first embodiment are used to describe the vehicle of the second embodiment. The cooling fan control device will be described.

As shown in FIG. 8, the vehicle cooling fan control device 114 is provided with an interface section 114a as vehicle operating state detecting means and air conditioning operating state detecting means. The interface section 114a includes a clutch 3b of the compressor 3, a radiator fan 11,
A water temperature sensor 15 that is connected to the cooling fan 12 and that detects the cooling water temperature Tw of the engine 2;
Intake air temperature sensor 16 for detecting the intake air temperature Ti of the
Vehicle speed sensor 17 for detecting a vehicle speed V of the vehicle 1, an outside air sensor 18 for detecting an outside air temperature Ta of the vehicle 1, an inside air sensor 19 for detecting an indoor temperature Tr of the vehicle 1, and a solar radiation sensor for detecting an insolation amount Ts of the vehicle 1. 20 and an air conditioner switch 21 provided on the instrument panel of the vehicle 1 and provided with an air conditioner switch 21 and connected to an air conditioner operation unit 22 for setting a set temperature Tset for a driver or the like. Further, the vehicle cooling fan control device 114 includes a calculation unit 11 as a fan control unit, a load value calculation unit, and a total load value calculation unit.
4b and the storage unit 114c, the storage unit 114c,
Load value calculation program 114d and air conditioning load value Tao
The total load value calculation program 114e, the total air conditioning load value Tfan, the fan control table X2, and the fan control program 114f are stored.

The load value calculation program 114d has an outside air temperature Ta, an indoor temperature Tr, an amount of solar radiation Ts, and a set temperature Tset.
Is a program for calculating the air conditioning load value Tao based on Since the load value calculation program 114d is the same as that of the first embodiment, it will not be described in detail here.

The total load value calculation program 114e is a program for calculating the total air conditioning load value Tfan based on the intake air temperature Ti and the air conditioning load value Tao. In particular,
The intake air temperature Ti is divided into two conditions, a high temperature intake condition Ti0 and a low temperature intake condition Ti1, and an air conditioning load value Tao is high load value condition Tao0 and low load value condition T.
It is divided into two conditions, ao1. In this embodiment, the intake air temperature Ti is the same as that of the modification of the first embodiment, and as shown in FIG. 7, when the intake air temperature Ti exceeds the set value corresponding to the high temperature intake air condition, the high temperature intake air condition Ti0 is set, and the low temperature intake air Ti becomes low. The low temperature intake condition Ti1 is set when the value falls below a set value corresponding to the intake condition. The air conditioning load value Tao is the same as in the first embodiment, and as shown in FIG.
When it exceeds the set value corresponding to the high load value condition, it becomes the high load value condition Tao0, and when it falls below the set value corresponding to the low load value condition, it becomes the low load value condition Tao1. Then, each condition is weighted by a numerical value, and the condition of the intake air temperature Ti and the condition of the air conditioning load value are added to obtain the total air conditioning load value Tfan.
For example, the high temperature intake condition Ti0 is "1" and the low temperature intake condition T is
If i1 is set to “2”, weighting is performed by setting the high load value condition Tao0 to “1” and the low load value condition Tao1 to “2”, (total air conditioning load value Tfan) = (intake air temperature T
i condition) + (condition of air conditioning load value Tao),
The total air conditioning load value Tfan is one of "2", "3", and "4". That is, the total air conditioning load value Tfan is
The low load condition Tfan2 is "2", the medium load condition Tfan3 is "3", and the high load condition Tf is "4".
It is divided into three conditions as an4.

As shown in FIG. 9, the fan control table X
2 is the vehicle speed V of the vehicle 1, the cooling water temperature Tw of the engine 2,
ON / OFF of the clutch 3b, total air conditioning load value Tfan
It is created in advance by each parameter of. In the present embodiment, the cooling fan 12 is controlled so as to be in the OFF state which is a stopped state, the LO state which is a low rotation state, and the HI state which is a high rotation state, and the fan control table X2 sets each parameter. The control state of the cooling fan 12 is assigned according to the value. That is, the rotation condition of the cooling fan 12 is preset corresponding to the operating state of the vehicle 1 and the operating state of the air conditioner 9.

The vehicle speed V is 0 to 19 (km / h)
Is the first vehicle speed condition V1, 20-69 (km / h) is the second vehicle speed condition V2, 70-104 (km / h) is the third vehicle speed condition V3, 105- (km / h) is the fourth vehicle speed condition V4. Are divided into four conditions. Furthermore, each vehicle speed condition V
1, V2, V3 and V4 are divided into two conditions depending on ON / OFF of the clutch 3b. Furthermore, when the clutch 3b is in the ON state, it is divided into three conditions by the total air conditioning load value Tfan. That is, the total of 16 conditions are divided by the vehicle speed V, ON / OFF of the clutch 3b, and the total air conditioning load value Tfan.

The cooling water temperature Tw is divided into three conditions: a first cooling water condition Tw1, a second cooling water condition Tw2, and a third cooling water condition Tw3. Cooling water temperature T
The condition of w is the same as that of the first embodiment, and therefore the description is omitted here. Then, the above-mentioned vehicle speed V,
The table is created under a total of 48 conditions, which is a combination of the condition divided into 16 by the clutch 3b and the total air conditioning load value Tfan and the condition divided into 3 by the cooling water temperature Tw. Cooling fan 1 for each condition of the table
The OFF, LO, and HI states of No. 2 are assigned.

Here, the fan control table X2 is the first
Similarly to the embodiment of the present invention, for the vehicle speed V, the amount of ventilation to the condenser 4 by the cooling fan 12 decreases in the order of the first vehicle speed condition V1, the second vehicle speed condition V2, the third vehicle speed condition V3, and the fourth vehicle speed condition V4. As described above, the control state of the cooling fan 12 is assigned. In addition, the clutch 3b is also the first
Similar to the embodiment described above, the control state of the cooling fan 12 is assigned so that the ventilation amount in the condenser 4 increases in the ON state than in the OFF state. further,
Regarding the total air conditioning load value Tfan, considering the load on the air conditioner 9, the low load condition Tfan2 and the medium load condition Tfan
3, the control state of the cooling fan 12 is assigned in order of the high load condition Tfan4 so that the ventilation amount in the condenser 4 increases. Furthermore, regarding the cooling water temperature Tw, the control state of the cooling fan 12 is allocated in order of the first cooling water condition Tw1, the second cooling water condition Tw2, and the third cooling water condition Tw3 so that the ventilation amount in the radiator 10 increases. ing.

The fan control program 114f is based on the total air conditioning load value Tfan obtained by executing the total load value calculation program 114e, the cooling water temperature Tw, and the vehicle speed V according to the fan control table X2. 12 is a program for controlling 12.

The operation of controlling the number of rotations of the cooling fan 12 in the vehicle cooling fan control device 114 configured as described above will be described.

First, the load value calculation program 114d is executed to calculate the air conditioning load value Tao based on the outside air temperature Ta, the indoor temperature Tr, the solar radiation amount Ts, and the set temperature Tset. Next, the total load value calculation program 114e is executed to calculate the total air conditioning load value Tfan based on the intake air temperature Ti and the air conditioning load value Tao. Then, the fan control program 114f is executed to execute the fan control table X2.
The cooling fan 1 corresponding to the calculated total air conditioning load value Tfan and the detected cooling water temperature Tw and vehicle speed V
The number of rotations of the cooling fan 12 is controlled so that the control state of 2 is obtained. That is, the cooling fan 12 rotates in consideration of the operating condition of the air conditioner 9 by the total air conditioning load value Tfan, the operating condition of the engine 2 by the cooling water temperature Tw, and the ventilation condition of the traveling wind of the condenser 4 and the radiator 10 by the vehicle speed V. Control the number.

As described above, according to the vehicle cooling fan control device 114 of the present embodiment, the total air conditioning load value Tfan is calculated from the intake air temperature Ti and the air conditioning load value Tao, and based on the total air conditioning load value Tfan. Since the rotation speed of the cooling fan 12 is controlled, the rotation speed of the cooling fan 12 is controlled by grasping the operating state of the air conditioner 9 from the total air conditioning load value Tfan. Therefore, the cooling fan 12 can be appropriately controlled according to the operating state of the air conditioner 9 without providing a refrigerant pressure detector or the like in the cooling cycle.

Further, according to the vehicle cooling fan control device 14 of the present embodiment, the cooling fan 12 is based on the total air conditioning load value Tfan, the cooling water temperature Tw, the vehicle speed V, and the ON / OFF of the clutch 3b. Since the number of revolutions is controlled, the minimum necessary optimum operation of the cooling fan 12 is realized based on the total air conditioning load value Tfan in which the operating state of the engine 2 is taken into consideration. Therefore, the total air conditioning load value T
With the limited parameters such as fan, cooling water temperature Tw, vehicle speed V, etc., the rotation speed of the cooling fan 12 can be efficiently controlled in consideration of the operating state of the engine 2, and the auxiliary machinery can be efficiently saved. It is possible to improve the reliability and durability of the cooling fan 12 by reducing power consumption and noise and vibration by the cooling fan 12.

In the above embodiment, the total air conditioning load value Tfan is calculated from the intake air temperature Ti and the air conditioning load value Tao, but the total air conditioning load value is calculated from the intake air temperature Ti and the outside air temperature Ta. You may do it.
In this case as well, since the total air conditioning load value is calculated using the intake air temperature, the total air conditioning load value takes into consideration the operating state of the engine.

In the above embodiment, the conditions of the intake air temperature Ti and the air conditioning load value Tao are weighted and the numerical values of the intake air temperature Ti and the air conditioning load value Tao are added. , The condition of the intake air temperature Ti and the numerical value of each condition of the air conditioning load value Tao may be multiplied,
The method of calculating the total air conditioning load value Tfam is not limited to the method of the above embodiment.

10 to 13 show the third embodiment of the present invention, and FIG. 10 is a schematic block diagram of an air conditioner and a vehicle cooling fan controller. In addition, in the third embodiment, the configuration of the vehicle cooling fan control device is different from that of the first embodiment, and hereinafter, the same reference numerals as those in the first embodiment will be used to describe the third embodiment. The vehicle cooling fan control device will be described.

As shown in FIG. 10, the vehicle cooling fan control device 214 includes an interface section 214a as a vehicle operating state detecting means and an air conditioning operating state detecting means. The interface section 214a includes the clutch 3b of the compressor 3 and the radiator fan 11
And the cooling fan 12, and the engine 2
Water temperature sensor 15 for detecting the cooling water temperature Tw of the engine, an intake air temperature sensor 16 for detecting the intake air temperature Ti of the engine 2, a vehicle speed sensor 17 for detecting the vehicle speed V of the vehicle 1, and an outside air temperature Ta of the vehicle 1. An outside air sensor 18, an inside air sensor 19 for detecting an indoor temperature Tr of the vehicle 1, an insolation sensor 20 for detecting an insolation amount Ts of the vehicle 1, an air conditioner switch 21 provided on an instrument panel of the vehicle 1, and driving It is connected to the air-conditioning operation unit 22 in which a person or the like sets the set temperature Tset. Further, the vehicle cooling fan control device 214 has a calculation unit 214b and a storage unit 214c as fan control means, and the storage unit 214c has a set outside air temperature Tas, a set cooling water temperature Tws, and a compressor control. Program 214d
And a fan control program 214e are stored.

Set outside air temperature Tas and set cooling water temperature T
ws is a preset value, the set outside air temperature Tas is used in the fan control program 214e, and the set cooling water temperature Tws is used in the compressor control program 214d.

The compressor control program 214d is
It is a program for controlling the compressor 3, and is executed by the arithmetic unit 214a. In the present embodiment, the compressor control program 214d is configured to operate / stop the compressor 3 based on the ON / OFF state of the air conditioner switch 21 and the cooling water temperature Tw. Here, the operation / stop of the compressor 3 is controlled by setting the clutch 3b in the power connection state or the power disconnection state.

The fan control program 214e is a program for controlling the cooling fan 12, and the arithmetic unit 2
14a. In this embodiment, the operating state of the compressor 3 and the air conditioner switch 21 are turned on.
-The cooling fan 1 is based on OFF and the outside air temperature Ta.
It is designed to start and stop 2 Here, the fan control program 214e has three states of OFF, LO, and HI as in the first and second embodiments.
2 is controlled.

FIG. 11 shows the compressor control program 21.
4d is a flowchart showing the operation of the vehicle cooling fan control device 214 when executing the 4d and the fan control program 214e. The operation of the vehicle cooling fan control device 214 will be described below with reference to FIG.

First, it is determined whether or not the cooling fan 12 is operating in the LO state (step S1). If the cooling fan 12 is not operating in the LO state, as in the first and second embodiments,
The cooling fan 12 is controlled based on ON / OFF of the compressor 3 (step S2).

In step S1, the cooling fan 12 is set to LO.
When operating in the state, it is determined whether the outside air temperature Ta is higher than the set outside air temperature Tas (step S
3). When the outside air temperature Ta is higher than the set outside air temperature Tas in step S3, the cooling fan 12 is controlled based on the ON / OFF state of the air conditioner switch 21 (step S4). In step S3, when the outside air temperature Ta is equal to or lower than the set outside air temperature Tas, the process proceeds to step S2, and the cooling fan 12 is controlled based on ON / OFF of the compressor 3.

FIG. 13 is a timing chart of the compressor 3 and the cooling fan 12. Hereinafter, the control states of the compressor 3 and the cooling fan 12 when the above-described compressor control program 214d and fan control program 214e are executed will be described in detail with reference to FIG.

When the outside air temperature Ta is equal to or lower than the set outside air temperature Tas, the cooling fan 12 is controlled in the same manner as in the first and second embodiments according to the tables shown in FIGS.

The outside air temperature Ta is the set outside air temperature Tas.
When the cooling fan 12 is in the LO state, the control is performed based on ON / OFF of the air conditioner switch 21. For example, as shown in FIG. 12, the “clutch” in the fan control table of FIG.
/ C SW) ”, the cooling fan 12 is controlled according to the fan control table X3. Here, in the fan control table X3, the "clutch" in the control table of FIG. 9 is not "air conditioner switch (A / C SW)" in FIG.
Of course, it may be that Thereby, as shown in FIG. 13, the cooling fan 12 is controlled regardless of the operating state of the compressor 3, and the cooling fan 12 is controlled.
Hunting does not occur. The mechanism of occurrence of this hunting will be described later. The cooling fan 12 is L
When it is not in the O state, the cooling fan 12 is controlled in the same manner as in the first and second embodiments according to the tables as shown in FIGS.

Here, the air conditioner switch 21 is turned on and off.
A mechanism of occurrence of hunting in the cooling fan 12 when the control is not performed based on the FF will be described. For example, when the anti-freezing device for the air conditioner is activated and the compressor 3 is turned off, the cooling fan 12 is turned off from the LO state. Then, since the outside air temperature Ta is high, the cooling water temperature Tw rises, passes through the LO state of the cooling fan 12 in a short time, and the cooling fan 1
2 is controlled in the HI state. Here, when the cooling fan 12 is controlled in the HI state, the cooling water temperature Tw sharply drops, and the cooling fan 12 shifts to the LO state. Hunting of the cooling fan 12 occurs by repeating the transition from the LO state to the HI state and from the HI state to the LO state.

That is, when the cooling fan 12 is controlled in accordance with the fan control table X3 as shown in FIG. 12, even if the above-mentioned antifreezing device is activated and the compressor 3 is turned off, the LO of the cooling fan 12 is changed. The state is maintained, and hunting of the cooling fan 12 is suppressed.

As described above, according to the vehicle cooling fan control device 214 of this embodiment, when the outside air temperature Ta is higher than the set outside air temperature Tas and the cooling fan 12 is in the LO state, regardless of the operating state of the compressor 3. Since the cooling fan 12 is controlled, hunting of the cooling fan 12 is suppressed. Therefore, the load applied to the mounting portion of the cooling fan 12 is reduced, and the reliability of the cooling fan 12 is improved.
The durability can be improved, and the power consumption of the auxiliary machinery and the noise and vibration due to the cooling fan 12 can be reduced.

In the above embodiment, the control table X3 for controlling based on the ON / OFF of the air conditioner switch 21 is not limited to that shown in FIG. 12, and other specific detailed structures and the like. It is needless to say that the above can be changed appropriately.

[0084]

As described above in detail, according to the vehicle cooling fan control device of the present invention, the operating state of the air conditioner can be accurately grasped without providing the refrigerant pressure detector or the like in the air conditioner, and the air conditioner can be operated. It is possible to appropriately control the cooling fan according to the operating state of.

[Brief description of drawings]

FIG. 1 shows a first embodiment of the present invention, and is a schematic explanatory view showing an arrangement of air conditioners in an engine room of a vehicle.

FIG. 2 is a schematic configuration block diagram of an air conditioner and a vehicle cooling fan control device.

FIG. 3 is a graph showing a relationship between an air conditioning load value and an air conditioning load.

FIG. 4 is an explanatory diagram for dividing an air conditioning load value into a high load value condition and a low load value condition.

[Fig. 5] Vehicle speed, cooling water temperature, clutch of compressor,
It is a part of the fan control table created according to each condition of the air conditioning load value.

FIG. 6 shows a modified example of the first embodiment of the present invention and is an explanatory diagram when the outside air temperature is divided into a high temperature outside air condition, a medium temperature outside air condition, and a low temperature outside air condition.

FIG. 7 shows a modified example of the first embodiment of the present invention and is an explanatory diagram when the intake air temperature is divided into a high temperature intake condition and a low temperature intake condition.

FIG. 8 shows a second embodiment of the present invention and is a schematic block diagram of an air conditioner and a vehicle cooling fan control device.

[Fig. 9] Vehicle speed, cooling water temperature, compressor clutch,
It is a part of the fan control table created under each condition of the total air conditioning load value.

FIG. 10 illustrates a third embodiment of the present invention and is a schematic configuration block diagram of an air conditioner and a vehicle cooling fan control device.

FIG. 11 is a flowchart showing the operation of the vehicle cooling fan control device when the compressor control program and the fan control program are executed.

FIG. 12 is a part of a fan control table created under each condition of vehicle speed, cooling water temperature, air conditioner switch, and total air conditioning load value.

FIG. 13 is a timing chart of a compressor and a cooling fan.

[Explanation of symbols]

1 vehicle 2 engine 4 capacitors 9 Air conditioner 10 radiator 11 radiator fan 12 Cooling fan 14 Vehicle cooling fan controller 14a Interface part 14b Operation unit 14c storage unit 14d Load value calculation program 14e Fan control program 114 Vehicle cooling fan control device 114a interface section 114b operation unit 114c storage unit 114d Load value calculation program 114e Total load value calculation program 114f fan control program 214 Vehicle cooling fan control device 214a interface unit 214b Operation unit 214c storage unit 214d Compressor control program 214e Fan control program Ta outside air temperature Tao air conditioning load value Tfan Total air conditioning load value Ti intake air temperature Tr room temperature Tset set temperature V vehicle speed X1 fan control table X2 fan control table X3 fan control table

Front page continuation (51) Int.Cl. ⁷ Identification code FI theme code (reference) B60K 11/04 B60K 11/04 K L F01P 7/04 F01P 7/04 J K N

Claims (7)

[Claims] 1. Corresponding to a vehicle operating state detecting means for detecting an operating state of a vehicle, an air conditioning operating state detecting means for detecting an operating state of an in-vehicle air conditioner, the vehicle operating state and the operating state of the air conditioner. Cooling fan control device including a radiator for cooling engine cooling water and a fan control means for variably controlling the rotation speed of a cooling fan capable of cooling a condenser of the air conditioner based on a preset rotation condition. In the above, the vehicle operating state detecting means is for detecting the engine cooling water temperature and the vehicle speed of the vehicle as the vehicle operating state, and the air conditioning operating state detecting means is an outside air temperature in the vehicle and Indoor temperature, the amount of solar radiation in the vehicle, the set temperature set by the air conditioning operation unit provided in the vehicle,
Which is detected as the operating state of the air conditioner, based on the outside air temperature, the indoor temperature, the solar radiation amount, and the set temperature set by the air conditioning operation unit provided in the vehicle, And a load value calculating means for calculating an air conditioning load value as an operating state of the air conditioner, wherein the fan control means has the air conditioning load value calculated by the load value calculating means and the engine cooling water temperature. When,
A cooling fan control device for a vehicle, which controls the cooling fan based on the vehicle speed. 2. The air conditioning operating state detecting means detects an engine intake air temperature as an operating state of the air conditioner, and the fan control means calculates the engine intake air temperature and the load value calculating means. The vehicle cooling fan control device according to claim 1, wherein the cooling fan is controlled based on the air conditioning load value, the engine cooling water temperature, and the vehicle speed that have been set. 3. A total load value calculation means for calculating a total air conditioning load value based on the engine intake air temperature and the air conditioning load value, wherein the fan control means is calculated by the total load value calculation means. The vehicle cooling fan control device according to claim 2, wherein the cooling fan is controlled based on the comprehensive air conditioning load value, the engine cooling water temperature, and the vehicle speed. 4. A vehicle operating state detecting means for detecting an operating state of a vehicle, an air conditioning operating state detecting means for detecting an operating state of an in-vehicle air conditioner, and a vehicle operating state and an operating state of the air conditioner. Cooling fan control device including a radiator for cooling engine cooling water and a fan control means for variably controlling the rotation speed of a cooling fan capable of cooling a condenser of the air conditioner based on a preset rotation condition. In the above, the vehicle operating state detecting means is for detecting the engine cooling water temperature and the vehicle speed of the vehicle as the vehicle operating state, and the air conditioning operating state detecting means determines the outside air temperature in the vehicle. What is detected as the operating state of the air conditioner, wherein the fan control means controls the outside air temperature, the engine cooling water temperature, and the vehicle speed. A cooling fan control device for a vehicle, which controls the cooling fan based on the above. 5. The air conditioning operating state detecting means detects an engine intake air temperature as an operating state of the air conditioner, and the fan control means includes the engine intake air temperature, the outside air temperature, and the engine. Cooling water temperature, the vehicle speed,
The vehicle cooling fan control device according to claim 4, wherein the cooling fan is controlled based on the above. 6. A total load value calculating means for calculating a total air conditioning load value based on the engine intake air temperature and the outside air temperature, wherein the fan control means is calculated by the total load value calculating means. 6. The vehicle cooling fan control device according to claim 5, wherein the cooling fan is controlled based on the total air conditioning load value, the engine cooling water temperature, and the vehicle speed. 7. A vehicle operating state detecting means for detecting an operating state of a vehicle, an air conditioning operating state detecting means for detecting an operating state of an in-vehicle air conditioner, the vehicle operating state and the operating state of the air conditioner. Cooling fan control device including a radiator for cooling engine cooling water and a fan control means for variably controlling the rotation speed of a cooling fan capable of cooling a condenser of the air conditioner based on a preset rotation condition. In the above, the vehicle operating state detecting means is for detecting the engine cooling water temperature and the vehicle speed of the vehicle as the vehicle operating state, and the air conditioner operating state detecting means is the engine of the vehicle. An intake air temperature is detected as an operating state of the air conditioner, wherein the fan control means controls the engine intake air temperature and the engine cooling water temperature. A cooling fan control device for a vehicle, which controls the cooling fan based on the vehicle speed.