JPH06278446A - Air-conditioning control device for vehicle - Google Patents

Abstract

PURPOSE:To prevent the increase of temperature in a vehicle room to a value higher than a set temperature during high speed running in a heating state and to prevent the occurrence of excessive heating by decreasing an amount of air discharged through a discharge port when a car speed detected by a car speed sensor exceeds a given car speed for a given time. CONSTITUTION:An air-conditioning control device for a vehicle comprises an internal air temperature set part 24 to set the indoor temperature of a vehicle; an internal air temperature sensor 26 to detect the indoor temperature of a vehicle/and a car speed sensor 25 to detect a car speed. During heating of a vehicle, a controller 17 causes the decrease of an amount of air blown off through a blow-off port when a vehicle indoor temperature detected by the internal air temperature sensor 16 is below a set temperature set by the internal air temperature set part 24, a state wherein outside air is introduced through an outside air input port to the interior of a vehicle is produced, and a car speed detected by the car speed sensor 25 exceeds a given car speed for a given time. This constitution prevents the increase of a vehicle indoor temperature to a value higher than a set temperature even when the amount of air introduced in a vehicle room during high speed running.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicular air conditioning control device, and more particularly to a vehicular air conditioning control device suitable for accurate temperature control when the vehicle is traveling at high speed.

[0002]

2. Description of the Related Art Conventionally, in a vehicle air conditioner (automatic air conditioner) mounted on a vehicle, a vehicle interior temperature (inside air temperature), a vehicle outside temperature (outside air temperature), and a vehicle output from various sensors mounted on the vehicle. Based on information such as engine cooling water temperature, evaporator temperature, and set temperature in the vehicle compartment, the controller determines the air volume of the blower fan for blowing air and the temperature of the air blown from the air outlet in the vehicle interior (or the temperature of the blown air). It controls the opening of the air mix damper).

[0003]

However, when a vehicle equipped with a conventional vehicle air-conditioning system is driven at high speed with the outside air introduced into the vehicle compartment, the engine coolant temperature (Fig. The temperature of the air blown from the air outlet (Fig. 5).
Phenomenon in which the temperature inside the vehicle (the temperature indicated by the curve K3 in FIG. 5) rises when the blowing air circulates inside the vehicle as a result of the increase in the temperature indicated by the curve K2 in FIG. Was occurring. That is, since the amount of air introduced into the vehicle interior increases due to the influence of the traveling wind accompanying the high-speed traveling of the vehicle, the same phenomenon as when the amount of air blown from the air outlet increases is generated, and the temperature inside the vehicle rises. There was a problem that the degree became large. In this case, particularly when heating the vehicle interior, there is a problem that the vehicle interior is overheated to a temperature higher than the set heating temperature.

Further, in the conventional vehicle air conditioner, the response of the inside air temperature sensor (thermistor) for detecting the temperature inside the vehicle (inside air temperature) is slow, and the volume of the object of air conditioning in the vehicle interior is large, so that the vehicle enters the high speed running state. When a certain amount of time has passed since the transition, the inside air temperature sensor outputs a detection signal (see FIG. 5).
The temperature detected by the inside air temperature sensor (shown by the curve K4) is output to the controller. For this reason, the controller determines whether the vehicle interior temperature has risen too much above the set temperature (time t in FIG. 5), that is, the rise in the cooling water temperature and the effect of traveling wind (increase in air volume due to introduction of outside air). When the temperature inside the vehicle becomes considerably higher than the temperature at the beginning, the temperature inside the vehicle is lowered by lowering the temperature of the blowing air (the temperature indicated by the curve K5 in FIG. 5). As a result, the decrease control of the vehicle interior temperature is not performed until the vehicle interior temperature becomes considerably higher than the set temperature,
There is a problem that it gives an uncomfortable feeling to the vehicle occupants.

[0005]

An object of the present invention is to improve the inconvenience of the above-mentioned conventional example, and particularly to control the air conditioning at an early stage so that the vehicle interior temperature does not become higher than the set temperature when the vehicle is running at a high speed with the vehicle interior heated. It is an object of the present invention to provide a vehicle air conditioning control device that prevents overheating of the vehicle interior by performing the above.

[0006]

The present invention according to claim 1 is mounted on a vehicle having a vehicle speed sensor for detecting a vehicle speed, an outside air inlet for introducing outside air, and an outlet for blowing out an air-conditioned airflow of a predetermined temperature. In the vehicle air-conditioning control device, the vehicle room temperature setting means for setting the room temperature of the vehicle, the vehicle room temperature sensor for detecting the room temperature of the vehicle, and the controller for air-conditioning control are provided. When the vehicle is heated, the vehicle interior temperature detected by the vehicle interior temperature sensor is lower than the set temperature set by the vehicle interior temperature setting means, and outside air is introduced into the vehicle from the outside air introduction port, Further, when it is determined that the vehicle speed detected by the vehicle speed sensor exceeds the predetermined vehicle speed for a predetermined time, the amount of air blown from the air outlet is reduced. It has a configuration having a function of. The present invention according to claim 2 is a vehicle speed sensor for detecting a vehicle speed,
A vehicle interior temperature setting unit that is installed in a vehicle having an outside air introduction port for introducing outside air and an air outlet that blows out an air-conditioned airflow of a predetermined temperature, and a vehicle interior temperature setting unit that detects the interior temperature of the vehicle In a vehicle air-conditioning control device including a vehicle interior temperature sensor for controlling and a controller for performing air-conditioning control, the controller is
The vehicle interior temperature detected by the vehicle interior temperature sensor is lower than the set temperature set by the vehicle interior temperature setting means, outside air is being introduced into the vehicle from the outside air introduction port, and detected by the vehicle speed sensor. When it is determined that the vehicle speed has exceeded the predetermined vehicle speed for a predetermined time, a function is provided to reduce the temperature of the air blown from the air outlet. The present invention according to claim 3 is provided in a vehicle having a vehicle speed sensor for detecting a vehicle speed, an outside air inlet for introducing outside air, and an air outlet for blowing out an air-conditioned airflow of a predetermined temperature, and sets an indoor temperature of the vehicle. In a vehicle air-conditioning control device comprising: a vehicle room temperature setting means for controlling the vehicle room temperature; a vehicle room temperature sensor for detecting the room temperature of the vehicle; and a controller for performing air conditioning control, the controller is configured to heat the vehicle when the vehicle is heated. The vehicle interior temperature detected by the interior temperature sensor is lower than the set temperature set by the vehicle interior temperature setting means, the outside air is introduced into the vehicle from the outside air introduction port, and the vehicle speed detected by the vehicle speed sensor is When it is determined that the vehicle speed exceeds the predetermined speed for a predetermined time, a function of reducing the amount of air blown out from the air outlet and the temperature of the air blown out It has a configuration that includes. This is intended to achieve the above-mentioned object.

[0007]

According to the present invention, in order to heat the inside of the vehicle by a vehicle occupant who is normally running the vehicle (low and medium speed running), the outside air is introduced into the inside of the vehicle from the outside air introduction port, and the temperature inside the vehicle is increased. After the vehicle interior temperature is set to a desired temperature by the setting means and the vehicle is allowed to travel for a predetermined time at a speed exceeding the predetermined vehicle speed, the controller causes the vehicle interior temperature detected by the vehicle interior temperature sensor to be the vehicle interior temperature. It is judged to be lower than the set temperature set by the indoor temperature setting means,
Since it is determined that the outside air is in the introduction state from the outside air introduction port and the vehicle speed detected by the vehicle speed sensor has exceeded the predetermined vehicle speed for a predetermined time, the amount of air blown from the air outlet is reduced. That is, during high-speed traveling in which the vehicle travels at a speed exceeding the predetermined vehicle speed for a predetermined time, the amount of air blown out from the air outlet is reduced, so that it is introduced into the vehicle interior due to the influence of the traveling wind accompanying the high-speed traveling of the vehicle. Even if the amount of air to be supplied increases, it is possible to prevent the temperature inside the vehicle interior from rising. Therefore, it is possible to prevent the conventional problem that the vehicle interior is overheated during heating, and the temperature inside the vehicle interior is also increased. It is possible to maintain an appropriate temperature (set temperature). Further, according to the present invention, when the temperature of the air blown from the air outlet is reduced, or when the amount of air blown from the air outlet and the temperature of the air blown are reduced, the vehicle travels at high speed in the same manner as above. Despite the increase in the amount of air introduced into the vehicle interior due to the influence of the traveling wind, it is possible to prevent the temperature inside the vehicle interior from rising, and thus the conventional vehicle interior is overheated during heating. In addition to being able to prevent the above, it is possible to maintain the vehicle interior temperature at an appropriate temperature (set temperature).

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment to which a vehicle air conditioning control device of the present invention is applied will be described below with reference to the drawings.

First, the structure of a vehicle equipped with the vehicle air-conditioning control device of this embodiment will be described with reference to FIG. 2. The instrument panel of the vehicle 1 has various operation switches such as an inside air temperature setting unit described later. An air conditioner (automatic air conditioner) equipped with a controller for air conditioning control is installed. An outside air introduction port 2 for introducing outside air from the outside of the vehicle is arranged in the hood near the front window glass of the vehicle 1, and inside air for introducing the inside air of the vehicle interior is introduced into the interior of the vehicle 1. An opening 3 is provided, and an inside / outside air door 4 for adjusting the introduced amount of outside air / inside air is provided in the vicinity of the outside air introduction port 2 and the inside air introduction port 3.

A blower fan 6 driven by a blower fan motor 5 is disposed downstream of the inside / outside air door 4, and the outside air introduced through the outside air inlet 3 or the inside air introduced through the inside air inlet 4 is evaporated. It is designed to be pumped to the side. An evaporator 7 is arranged on the downstream side of the blower fan 6 so that a refrigerant vapor compressed by a compressor described later is heat-exchanged with air supplied from the blower fan 6 to be vaporized. An air mix door 8 is provided on the downstream side of the evaporator 7 so that the air supplied from the evaporator 7 is divided into two directions.

A heater core 9 is provided near the air mix door 8 to heat a part of the air supplied from the evaporator 7. A vent door 10 and a blowout port 11 are provided on the downstream side of the air mix door 8, and the amount of air divided by the air mix door 8 is adjusted by the vent door 10 and blown out from the blowout port 11 to the vehicle interior 12. It is like this. A floor door 13 and a blowout port 14 are disposed on the downstream side of the heater core 9, and the amount of air heated by the heater core 9 is adjusted by the floor door 13 so that the air is blown out from the blowout port 14 into the vehicle interior 11. There is.

On the other hand, at a predetermined location outside the vehicle body of the vehicle 1,
An outside air temperature sensor 15 is provided, detects an outside air temperature outside the vehicle, and outputs an outside air temperature detection signal to an air conditioning control controller 17, which will be described later, which controls each part of the vehicle air conditioning control device. . Further, an inside air temperature sensor 16 is arranged at a predetermined location in the vehicle interior 10 of the vehicle 1, detects the inside air temperature of the vehicle interior 10, and outputs an inside air temperature detection signal to an air conditioning control controller 17 described later. It is like this.

Next, the configuration of the control system in the vehicle air conditioning control device of this embodiment will be described with reference to FIG. 1. An air conditioning control controller 1 for controlling each part of the vehicle air conditioning control device will be described.
7, a power source 18, an accelerator switch 19, an engine speed sensor 20, a cooling water temperature sensor 21, an outside air temperature sensor 1
5, an inside air temperature sensor 16, an evaporator temperature sensor 22, a solar radiation amount sensor 23, an inside air temperature setting unit 24, and a vehicle speed sensor 25 are connected to each other. Further, the air conditioning control controller 1
7, a blower fan motor 5, a compressor 26, an idle up solenoid 27, an inside / outside air door actuator 28, an inside / outside air door position sensor 29, an air mix door actuator 30, and an air mix door position sensor 31 are connected. ing.

The accelerator switch 19 detects the depression of the accelerator by the vehicle driver, and the engine speed sensor 20 detects the engine speed.
The cooling water temperature sensor 21 detects the cooling water temperature of the engine, the outside air temperature sensor 15 detects the outside air temperature, the inside air temperature sensor 16 detects the inside air temperature, and the evaporator temperature sensor 2
2 is adapted to detect the evaporator temperature.
The solar radiation sensor 23 detects the solar radiation outside the vehicle 1, and detects the vehicle speed sensor 25 and the vehicle speed of the vehicle 1. From the inside air temperature setting unit 24, the inside air temperature (vehicle interior temperature) is set by the vehicle occupant. Then, each detection signal and setting signal are output from the respective units to the air conditioning control controller 17.

The air conditioning controller 17 outputs control signals to the blower fan motor 5, the compressor 26, the idle up solenoid 27, the inside / outside air door actuator 28, and the air mix door actuator 30. In addition, the blower fan motor 5
Drives the blower fan 6 based on the control signal, and the compressor 24 compresses the refrigerant vapor based on the control signal. The idle up solenoid 27 is adapted to perform idle up based on a control signal.

The inside / outside air door actuator 28 drives the inside / outside air door 4 to be in the outside air introduction state or the inside air introduction state based on the control signal, and the air mix door actuator 30 is based on the control signal.
Is designed to drive. The inside / outside air door position sensor 29 detects at which position the inside / outside air door 4 is located, and the air mix door position sensor 31 detects at which position the air mix door 8 is located. It outputs to 17 respectively.

Next, an air-conditioning control operation diagram of the vehicle air-conditioning control device of the present embodiment configured as described above will be described with reference to FIGS. 3 and 4.

In FIG. 3, the air-conditioning controller 17 detects, by the inside air temperature sensor 16, the set temperature in the vehicle interior set by the inside temperature setting unit 24 of the air conditioner by the vehicle occupant to heat the inside of the vehicle interior 12. It is determined whether the temperature is equal to or higher than the vehicle interior temperature (inside air temperature) (step S1),
When it is determined that the set temperature is equal to or lower than the vehicle interior temperature, normal air conditioning control is performed to control the amount of air blown out from the air outlets 11 and 14 or the temperature of the air blown (step S2).

When it is determined in step S1 that the set temperature is equal to or lower than the vehicle interior temperature, the air conditioning controller 17 determines the temperature based on the detection signal output from the inside / outside air door position sensor 29, that is, the inside / outside air door. 4 is in the outside air introduction position, it is determined whether outside air is introduced from the outside air introduction port 2 (step S3). If it is determined that outside air is not introduced, normal control in step S2 is performed. I do.

If it is determined in step S3 that the outside air is introduced, the air conditioning controller 17 determines, based on the detection signal output from the vehicle speed sensor 25,
It is determined whether the vehicle speed is equal to or higher than a predetermined vehicle speed (for example, 60 km / h) (step S4), and the vehicle speed is equal to or higher than the predetermined vehicle speed (for example, 60 km).
Km / h), that is, when it is determined that the vehicle 1 is normally traveling, the normal control of step S2 is performed.

In step S4, the air conditioning control controller 17 determines that the vehicle speed is a predetermined vehicle speed (for example, 60 km / meter).
h) Above, that is, when it is determined that the vehicle 1 is traveling at high speed, it is determined whether or not the vehicle 1 has continued to travel at high speed for a predetermined time (for example, 2 minutes) after starting high speed traveling in the outside air introduction state. If it is determined (step S5) and it is determined that high-speed traveling has continued for a predetermined time (for example, 2 minutes), the air-mix door actuator 30 and the like are drive-controlled to adjust the opening degree of the air-mix door 8. Outlet 11,
Control is performed to reduce the amount of blown air from 14 or the temperature of the blown air (step S6). The above is the flow of the air conditioning control of the present embodiment.

That is, when the vehicle 1 is switched from normal running to high speed running while heating the vehicle 1, the cooling water temperature of the engine (the temperature indicated by the curve K6 in FIG. 4) rises. As described above, when a predetermined time (for example, 2 minutes) elapses from the start of high-speed traveling (time t ′ in FIG. 4),
The temperature of the air blown from the air outlet in order to reduce the amount of airflow or the temperature of the airflow (the temperature indicated by the curve K7 in FIG. 4)
Can be maintained at the same temperature as during normal traveling, and thus the vehicle interior temperature (the temperature indicated by the curve K8 in FIG. 4) can also be maintained at the same temperature as during normal traveling. Figure 4
At time t ′, the temperature inside the vehicle rises only slightly, so that there is no problem of giving a vehicle occupant an uncomfortable feeling as in the conventional case.

As described above, according to the vehicle air conditioning control device of the present embodiment, when the vehicle 1 is heated at high speed continuously for a predetermined time while the vehicle 1 is being heated, the conventional air conditioning control is performed. Since the amount of blown air or the temperature of the blown wind is reduced at an early stage as compared with the above, even if the amount of air introduced into the vehicle interior increases due to the influence of the traveling wind accompanying the high speed running of the vehicle 1, It is possible to prevent the temperature from rising above the set temperature, and as a result, it is possible to prevent the problem that the vehicle interior is excessively heated as in the past, and to keep the vehicle interior temperature at the set temperature. You can

Further, in the vehicle air conditioning control device of this embodiment, the vehicle speed sensor 25 used to determine whether or not the vehicle is traveling at high speed is the existing vehicle speed sensor that is conventionally equipped in the vehicle. Therefore, it is not necessary to newly install the vehicle speed sensor, and the vehicle air conditioning control device can be provided at low cost.

In this embodiment, step S in FIG.
In 4 it is determined whether the vehicle speed is, for example, 60 km / h or higher, and in step S5 it is determined whether the high speed running of the vehicle has continued for 2 minutes, for example. It is also possible to set to the numerical value of.

[0026]

As described above, according to the vehicle air conditioning control device of the present invention, the following effects can be obtained. When the vehicle is heated, the temperature of the vehicle interior detected by the vehicle interior temperature sensor is lower than the set temperature set by the vehicle interior temperature setting means, and the outside air is introduced into the vehicle from the outside air introduction port. If it is determined that the detected vehicle speed exceeds the predetermined vehicle speed for a predetermined period of time, the vehicle travels at a speed exceeding the predetermined vehicle speed for a predetermined period in order to reduce the amount of air blown from the air outlet. When the vehicle is running, even if the amount of air introduced into the vehicle interior increases due to the effect of the traveling wind, it is possible to prevent the vehicle interior temperature from rising above the set temperature by reducing the amount of air blown from the air outlet. As a result, it is possible to prevent the problem that the vehicle interior is excessively heated as in the conventional case, and it is possible to maintain the vehicle interior temperature at the set temperature. Also, when the temperature of the air blown from the air outlet is reduced, or when the amount of air blown from the air outlet and the temperature of the air blown are reduced, the effect of traveling air accompanying high-speed traveling of the vehicle is the same as above. As a result, it is possible to prevent the temperature in the vehicle compartment from rising regardless of the increase in the amount of air introduced into the vehicle compartment. Therefore, it is possible to prevent the problem that the vehicle compartment is overheated during heating, and at the same time, the vehicle The indoor temperature can be maintained at the set temperature.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a control system in a vehicle air conditioning control device of the present embodiment to which the present invention is applied.

FIG. 2 is a schematic diagram showing an internal configuration of a vehicle equipped with the vehicle air conditioning control device of the present embodiment.

FIG. 3 is a flowchart for explaining an air conditioning control operation in this embodiment.

FIG. 4 is a temperature characteristic diagram for explaining an air conditioning control operation in the present embodiment.

FIG. 5 is an explanatory diagram showing temperature states of respective portions during normal traveling and high-speed traveling of a vehicle equipped with a conventional vehicle air conditioner.

[Explanation of symbols]

 1 Vehicle 2 Outside Air Inlet 4 Inside / Outside Air Door 7 Evaporator 8 Air Mix Door 9 Heater Core 10 Vent Door 11, 14 Outlet 12 Floor Door 15 Outside Air Temperature Sensor 16 Inside Air Temperature Sensor as Vehicle Indoor Temperature Sensor 17 Air Conditioning Control Controller 24 as Controller Inside temperature setting unit as vehicle temperature setting means 25 Vehicle speed sensor

Claims (3)

[Claims] 1. A vehicle passenger compartment equipped with a vehicle speed sensor for detecting a vehicle speed, an outside air inlet for introducing outside air, and an outlet for blowing out an air-conditioned airflow of a predetermined temperature, and for setting an indoor temperature of the vehicle. In a vehicle air conditioning control device including a temperature setting means, a vehicle interior temperature sensor that detects an interior temperature of the vehicle, and a controller that performs air conditioning control, the controller controls the vehicle interior temperature sensor when the vehicle is heated. The vehicle interior temperature detected by the vehicle interior temperature is lower than the set temperature set by the vehicle interior temperature setting means, the outside air is introduced into the vehicle from the outside air inlet, and the vehicle speed detected by the vehicle speed sensor is maintained for a predetermined time. When it is determined that the vehicle speed exceeds a predetermined vehicle speed, a function of reducing the amount of air blown from the air outlet is provided. Vehicle air-conditioning control device. 2. A vehicle compartment equipped with a vehicle speed sensor for detecting a vehicle speed, an outside air inlet for introducing outside air, and an outlet for blowing out an air-conditioned airflow of a predetermined temperature, and for setting an indoor temperature of the vehicle. In a vehicle air conditioning control device including a temperature setting means, a vehicle interior temperature sensor that detects an interior temperature of the vehicle, and a controller that performs air conditioning control, the controller controls the vehicle interior temperature sensor when the vehicle is heated. The vehicle interior temperature detected by the vehicle interior temperature is lower than the set temperature set by the vehicle interior temperature setting means, the outside air is introduced into the vehicle from the outside air inlet, and the vehicle speed detected by the vehicle speed sensor is maintained for a predetermined time. When it is determined that the vehicle speed exceeds a predetermined speed, a function of reducing the temperature of the air blown from the air outlet is provided. The vehicle air conditioning control apparatus. 3. A vehicle passenger compartment equipped with a vehicle speed sensor for detecting a vehicle speed, an outside air inlet for introducing outside air, and an outlet for blowing out an air-conditioned airflow of a predetermined temperature, and for setting an indoor temperature of the vehicle. In a vehicle air conditioning control device including a temperature setting means, a vehicle interior temperature sensor that detects an interior temperature of the vehicle, and a controller that performs air conditioning control, the controller controls the vehicle interior temperature sensor when the vehicle is heated. The vehicle interior temperature detected by the vehicle interior temperature is lower than the set temperature set by the vehicle interior temperature setting means, the outside air is introduced into the vehicle from the outside air inlet, and the vehicle speed detected by the vehicle speed sensor is maintained for a predetermined time. When it is determined that the vehicle speed exceeds the predetermined vehicle speed, it has a function of reducing the amount of air blown out from the air outlet and the temperature of the air blown out. Vehicle air conditioning control device, characterized in that the.