JPH0558141A - Car air-conditioner - Google Patents

Abstract

PURPOSE:To prevent the thermal sense of a driver or assistant from being sacrificed in order to improve the thermal sense of a rear seat passenger or passengers in such a case that the car must run at a low speed because of traffic snarl to result in drop of the air-conditioner function. CONSTITUTION:An air-conditioning device for car concerned is equipped with a passenger sensor 1 to sense whether any passenger exists on the rear seats, a thermal load sensor 2 to sense the thermal load in position near a driver or assistant on the front seats, and a control device 3 which is fed with sensing signals from these sensors. When the passenger sensor 1 has sensed any person on the rear seats, when the specified car speed is not attained or the internal air introduction mode is in effect, and when the thermal load sensor 2 has sensed a thermal load value lying out of the specified range, the impression voltage of a blower 13 for sending the air-conditioning air to the blowout hole 4 furnished in the neighborhood of the driver or assistant is raised in conformity to the control signal given from the control device 3. The opening and closing of an air mix door 14 is corrected in the direction of decreasing the supply heat amount of the air temp. from the blowout hole 4 in an amount corresponding to the increment in the wind quantity resulting from raising of the impression voltage.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle air conditioner, and in particular, when an occupant is present in the rear seat, it is possible to perform conditioned air conditioning for both the front occupant and the rear occupant. The present invention relates to a vehicle air conditioner.

[0002]

2. Description of the Related Art Conventionally, as this type of vehicle air conditioner, for example, one shown in FIG. 5 is known (see Japanese Patent Laid-Open No. 59-143713). This is to detect the temperature inside the vehicle and the boarding rate to control the operation of the indoor fan, start and initialize in step 101,
Next, after detecting the temperature inside the vehicle and the boarding rate (step 102), a determination is made to determine the range of the boarding rate (step 103), and the operating set temperature of the indoor fan is determined based on this range (step 104). Next, it is determined whether or not the temperature inside the vehicle is equal to or higher than the set temperature (step 105), and when the temperature is equal to or higher than the set temperature, the indoor fan is operated (step 106), and after a certain time is counted by the timer (step 107), the step is performed. Returning to 102, the above routine is repeated. If the temperature inside the vehicle is equal to or lower than the set temperature in step 105, the operation of the indoor fan is kept stopped (step 108). Figure 6
Shows the operating / non-operating region of the indoor fan with respect to the vehicle interior temperature and the boarding rate in the air conditioner.

[0003]

By the way, since the blowing air of the air conditioner during cooling or heating is blown toward the chest and feet of the front seat occupant, it is generated between the front seat occupant and the rear seat occupant. The warm and cold sensations are generally different. Therefore, as described above, the entire vehicle compartment is subjected to one heat load, and the means for controlling the operation of the indoor fan by increasing the passenger compartment temperature due to the increase in the passenger ratio ignores the individual thermal sensation of front and rear passengers. Therefore, when trying to improve the thermal sensation of the passenger in the rear seat, there is a problem that the thermal sensation of the passenger in the front seat deteriorates.

Therefore, the technical problem to be solved by the present invention is to improve the thermal sensation of the rear-seat occupants within the range where the front-seat occupants do not feel uncomfortable.

[0005]

In order to solve the above technical problems, the present invention, as shown in FIG. 1, includes an occupant sensor 1 for detecting the presence or absence of an occupant in the rear seat, and a heat load in the vicinity of the occupant in the front seat. A heat load sensor 2 for detecting a passenger and a control device 3 to which detection signals from these sensors are input, and an occupant sensor 1 detects an occupant in the rear seat, and a predetermined vehicle speed has not been reached or internal air is introduced. When the heat load sensor 2 detects a heat load outside the predetermined range, the control signal from the control device 3 causes the air outlet 4 provided near the front seat occupant. While increasing the applied voltage of the blower 13 that sends the conditioned air, the opening and closing of the air mix door 14 is corrected in the direction of decreasing the heat supply amount of the air temperature from the air outlet 4 which increases the air volume by increasing the applied voltage. And means air conditioner for a vehicle.

[0006]

According to the above-mentioned means, when the air conditioner function is deteriorated due to a decrease in vehicle speed and the comfort of the rear seat occupant is particularly impaired, the air volume from the air outlet is increased to surround the rear seat occupant. By forming an air flow in the passenger compartment, comfort is improved, and the amount of heat supplied with an increase in air volume is reduced by adjusting the temperature of the blown air, so that the front seat occupant does not feel uncomfortable due to the introduction of induced wind.

[0007]

FIG. 2 shows an example of the construction of a vehicle air conditioner according to the present invention. Reference numeral 1 is an occupant sensor provided on a seat cushion of a rear seat 5, and 2 is an instrument panel 6. A heat load sensor 3 provided near the outlet 4 on the right end is a control device, and the passenger sensor 1
In addition to the detection signals from the heat load sensor 2, the room temperature detector 7, the outside air temperature detector 8, the solar radiation detector 9, the vehicle speed detector 1
0, signals from the room temperature setting device 11 and the position detector 12 of the air intake door are input. Further, a blower 1 for controlling the amount of air blown to the air outlet 4 from a control device 3 based on a signal from the above various detections.
3 and the air from the air outlet 4 are output to the drive device 15 of the air mix door 14.

FIG. 3 is a flowchart showing the control means of the vehicle air conditioner. In this control means, the detected values from the above-mentioned sensors and detectors are input in step 201 after the start. Next, in step 202, it is determined whether or not there is a rear seat occupant, and when it is determined that there is a passenger, it is determined in step 203 whether or not the vehicle speed is below a preset vehicle speed, for example, 40 km / h or less.
And when it is 40 km / h or less, or 40 km / h
Even if the above is the case, when the air intake door is in the state of introducing the inside air (step 204), in the next step 205, it is judged whether or not the air conditioner is in the cooling state (step 205), and cooling is performed. In the state, it is determined whether or not the air temperature near the front seat is 40 ° C. or less based on the detection signal from the heat load sensor 2 (step 206). Then, if it is 40 ° C. or less, it is determined that even if the amount of air from the outlet 4 is increased, the warmth and cold feeling of the front seat occupant does not deteriorate due to the induced wind, and the voltage applied to the blower 13 is increased. Direction correction (step 2
07), a control signal is output to the drive device 15 of the air mix door 14 to make a correction to increase the temperature of air blown out from the air outlet 4 (step 208). By correcting the applied voltage of the blower 13 and the opening / closing of the air mix door 14 as described above, when the vehicle speed is reduced or the cooling effect is reduced by introducing the inside air for a long time, especially when the passenger in the rear seat feels discomfort. , By raising the blowing temperature for the front passengers, the discomfort caused by the induced wind caused by the increase in the air volume from the outlet 4 is eliminated, and for the rear passengers, the blowing air reaches the rear seats and the air around The comfort due to the formation of the flow can be improved.

On the other hand, in step 205, when the air conditioner is not in the cooling condition, it is judged that the air conditioner is in the heating condition, and based on the detection signal from the heat load sensor 2, the air temperature near the front seat becomes 20 ° C. or more. It is determined whether or not there is (step 209). And, if it is 20 ° C or higher, the outlet 4
It is judged that even if the amount of air from the front is increased, the warmth and coldness of the front seat occupants will not deteriorate due to the induced wind, and the blower 1
The applied voltage of No. 3 is corrected to be increased (step 210), and a control signal is output to the driving device 15 of the air mix door 14 to be corrected to decrease the temperature of air blown from the air outlet 4 (step 211). Therefore, in this case, by lowering the blowing temperature to the front seat occupant, the discomfort caused by the induced wind caused by the increase in the air volume from the outlet 4 is eliminated, and the blowing air to the rear seat occupant reaches the rear seat. It is possible to improve comfort by reaching and forming an air flow around. Note that steps 202, 204, 206,
If the result of the determination is negative at 209, the normal applied voltage is set to the blower 13 (step 212),
Further, a control signal is output to the drive device 15 of the air mix door 14 so that the temperature of the blown air is normal (step 213).

FIG. 4 shows a second embodiment of the present invention. When the air volume from the air outlet 4 is increased, the air temperature in the vicinity of the occupant which does not cause discomfort due to the induced wind is set to a set temperature. It is made to be discriminated by.
That is, in this embodiment, attention is paid to the fact that the inducing threshold temperature at which the passenger feels comfortable varies depending on the set temperature during cooling or heating, and the next step of step 305 is the attraction depending on the set temperature during cooling and heating. There are newly provided steps 306 and 307 for calculating the limit temperature and steps 308 and 309 for determining whether the calculated temperature is higher or lower than the heat load temperature near the front seat, respectively. Note that steps 301 to 305
Is the same as steps 201 to 205 in the above embodiment, and steps 310 to 315 are the same as steps 207 to 208 and steps 210 to 213 in the above embodiment. Therefore, in this embodiment, since the heat load temperature is changed according to the set temperature, finer grain control is possible, and the heat load temperature near the front seat is uniquely determined as compared with the first embodiment. Thus, the uncomfortable area due to the heat load condition can be reduced.

[0011]

As described above, according to the vehicle air conditioner of the present invention, even when the vehicle speed is lowered or the air conditioner function of the air conditioner is lowered due to the introduction of the inside air, the front seat occupant can be used. And it becomes possible to operate the air conditioner corresponding to different thermal sensations of the passengers in the rear seat and the passengers in the front seat without making the front passengers uncomfortable due to the introduction of induced wind
In addition, comfort can be improved by forming an air flow around the passenger in the rear seat.

[Brief description of drawings]

FIG. 1 is a block diagram showing a principle diagram of the present invention.

FIG. 2 is an explanatory diagram showing a configuration example of the present invention.

FIG. 3 is a flow chart of the control device showing the first embodiment of the present invention.

FIG. 4 is a flow chart of a control device showing a second embodiment of the present invention.

FIG. 5 is a flowchart showing a control means of a conventional vehicle air conditioner.

FIG. 6 is a diagram showing an on / off region of an indoor fan.

[Explanation of symbols]

 1 occupant sensor 2 heat load sensor 3 control device 4 outlet 13 blower 14 air mix door

Claims (1)

[Claims] 1. An occupant sensor for detecting the presence or absence of a rear seat occupant, and a heat load sensor for detecting a heat load in the vicinity of a front seat occupant.
With a control device to which the detection signals from these sensors are input, the occupant sensor detects the occupant in the rear seat, and has not reached a predetermined vehicle speed or introduced internal air, and the thermal load sensor is When a heat load out of a predetermined range is detected, the control signal from the control device increases the applied voltage of the blower that sends the conditioned air to the air outlet provided near the front seat occupant while increasing the applied voltage. An air conditioner for a vehicle, wherein opening and closing of an air mix door is corrected so as to reduce the amount of heat supplied to the air temperature from the outlet for increasing the amount of air by increasing the air flow.