JPS60179321A - Air conditioner for car - Google Patents

Abstract

PURPOSE:To prevent the partial inclination of the car-interior temperature due to the change of the solar radiation direction by arranging solar radiation sensors at several places in the car interior and controlling the air amount blown- out from each blowing-out port according to the output of each sensor. CONSTITUTION:Each value of the opening degree of wind distributing doors 32d and 33d, solar radiation amount 30l and 30r, set room-temperature 13, room temperature 14, outside air temperature 15, the opening degree of an air mix door 7d is input into a control circuit 34. The aimed blowing-out temperature T0 is determined in an aimed blowing-out temperature calculation part 18a, and the opening degree of the air mix door is set to a prescribed value X0 through an air mix door opening-degree calculation part 18b. Similarly, the opening degree of the wind distributing door is driving-controlled 40 and 41. When a difference is generated in the solar radiation amount 30l and 30r, a control circuit 34 transmits the control signal for the opening degree of the wind distributing door according to the difference, and drives the driving circuits 40 and 41, and the change to the wind amount corresponding to the solar radiation amount is performed. With such constitution, comfortableness can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an air conditioner for a vehicle in which the IAI of air blown out from an outlet is made variable in accordance with the amount of solar radiation in various parts of the vehicle.

[N9 Akira of the prior art] Conventionally, for example, Japanese Patent Publication No. 54-12691 proposes a vehicle air conditioner that obtains air whose temperature is adjusted according to the amount of solar radiation and air-conditions the interior of a vehicle.

However, according to the above-mentioned published patent, since the air whose temperature is adjusted by one solar radiation sensor is obtained, when a vehicle is running, the direction of sunlight irradiation is constantly changing, and the direction of sunlight is constantly changing. The air temperature will be uneven in areas where it is not hit. Therefore, depending on the specified location inside the vehicle,
It turns out that you can't get the air temperature you want.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide an air conditioner for a vehicle in which the temperature of air inside a vehicle is appropriately adjusted without being biased even if the direction of sunlight irradiation changes.

[Structure of the invention]

In order to achieve this object, the amount of air discharged from the air outlets provided in various parts of the vehicle interior is changed according to the amount of solar radiation in various parts of the vehicle interior.

[Explanation of Examples]

Embodiments of the present invention will be described below with reference to FIG. 1 and the subsequent drawings. FIG. 1 is a plan view of a vehicle showing an example of how a solar radiation sensor used in the vehicle air conditioner of the present invention is attached to the vehicle, and FIG. 2 is a plan view of the vehicle air conditioner of the present invention. Schematic configuration diagram showing an example of internal configuration, 3rd
The figure is a circuit diagram showing an example of a circuit used in the vehicle air conditioner shown in FIG. 2.

In the vehicle 30 shown in FIG. 1, solar radiation sensors 301 and 3Or are attached to the upper surfaces of the left and right door trims, respectively.The vehicle air conditioner 31 shown in FIG. From the air inlet 3 provided with the air intake door 2, a blower fan 4 serving as an air blowing means is connected.
After the air is once cooled by the evaporator 6, which together with the compressor 5 constitutes a cooling means, a portion of the air is heated by the heater core 8, which serves as a heating means, depending on the opening degree of the air mix door 7. death,
After mixing with the air that bypassed the heater core 8,
Air is emitted from air outlets 9, 10, and 11 provided at certain locations. Each air outlet 9°10.11 is a defroster duct 9a.

It communicates with the interior of the vehicle via the ventilation duct 10a and the heater tact lla, and is provided with a defroster door 9b, a vent door 10b, and a heater door 11, respectively.
The balloon location is selected depending on whether b is opened or closed.

In the case of this example, the ventilation tact 10a is branched into two systems on the driver's seat side and the passenger seat side, one in the center and one on the side, respectively, and communicated with the vehicle interior, and the heater duct 11a is on the driver's seat side and the passenger seat side. Each branch is connected to one point at the foot of the road.

The air mix door 7 is driven to open and close by a diaphragm actuator 7a that utilizes air pressure, and includes a solenoid valve 7b for supplying negative pressure and a solenoid valve 7b for supplying atmospheric pressure! ! A valve 7e is connected in parallel to the actuator 7a. air mix door 7
The opening degree is detected by an air mix door opening sensor 7d consisting of a potentiometer, and is supplied to a control circuit 34 shown in FIG.

Furthermore, ventilation duct 10a and heater duct)
Inside the lla, there are ventilation doors 32 and 33, respectively. Actuator 32 that drives the ventilation door 32, 33
a and 33a are both electromagnetic valves 32b for supplying negative pressure.
, 33b and solenoid valves 32c, 33c for atmospheric pressure supply are connected in parallel, and the opening degree of each ventilation door 32, 33 is determined by a ventilation door opening sensor 32d, which is a potentiometer.
33d is detected by υ.

These ventilation door opening sensors 32d, 33d and the above-mentioned solar radiation sensors 30J, 30rta are both connected to the control circuit 34.

The control circuit 34 includes a room temperature setter 13. as shown in FIG. 3, which sets the room temperature. Room temperature sensor 14 for detecting room temperature. An outside air temperature sensor 15° that can detect the outside air temperature is connected to the air mix door opening sensor 7d mentioned above, etc., and the target air blowing temperature is determined according to the set room temperature 'i'' PTC and the output from each sensor. It is configured to include an arithmetic circuit 35 that performs arithmetic operations.

That is, the output from the room temperature setting device 13 and each sensor is converted into a digital signal by the AD converter 42, and then supplied to the target air temperature calculation section 18a in the calculation circuit 35, and is calculated using the calculation formula shown below, for example. According to target air temperature 'i'
, is calculated.

'I゛0=ATPTC-B7IQ -(, ('I's-
'l'INc)+1J(TPTCTINC)-to θ However, T'pTc is the set room temperature, 'i4 is the outside temperature,'
1′
Average output from 30r, θ is air mix door opening degree,
Coefficient A.

B, C, and IJ are constants determined for each vehicle.

(7) The target air outlet temperature calculating section 18a calculates the target air outlet temperature Tau, the near mix door opening degree H
'li part 18b K supply sale, F) + constant function formula Xo
=f('ra)''-), the target air mix door opening degree Xo is calculated.This target air mix door opening degree Xo
O is compared with the actual air mix door opening degree X sent from the Al) converter 17 in a comparator 19. The difference signal between the opening degree XO and Valve"/b, 7c K supply element'i1.

In this example, since the opening degree is Xo > x, I operate the solenoid valve 7C for atmospheric pressure supply 1, and the air mix door 7
operates on the temperature increasing side. Also, on the contrary, the opening degree is
<X, the solenoid valve 7b for negative pressure supply operates, and the air mix door 7 operates to the temperature lowering side. This opening/closing control of the air mix door 7 is continued until the opening relationship of Xo=x is obtained.

Further, in the calculation circuit 35, a ventilation door opening degree calculation section 35a is provided.
are provided, and for each ventilation door 32.33, a comparator 36, a7, a DA converter 38.39° door drive circuit 40.41 is connected to the ventilation door opening calculation section 35a. The ventilation door opening calculation section 35a is connected to the AD converter 4.
Based on the amount of solar radiation from the solar radiation sensors 301, 30r connected to
+ Calculate XHOk.

On the other hand, the actual opening degrees Xv and XH detected by the ventilation door opening sensors 32d and 33d are calculated by the eight-way converter 42.
After passing through, the comparators 36 and 37 compare the respective target door opening degrees Xvor and XHO. Then, according to the comparison results in the comparators 36 and 37, the opening difference XVO-
Install the ventilation door 32 so that Xv, XH6-XH becomes zero.
．． 33 controls are performed once.

Here, to explain using an example during cooling, if the driver's seat side and the passenger seat side have the same amount of solar radiation, the ventilation door 32.3
3 are both in the neutral position, and both the driver and assistant receive the same amount of air conditioning.

On the other hand, [7] For example, if the solar radiation on the driver's seat side is stronger than the solar radiation on the passenger seat side, and the cooling effect for the driver is weakened, the left and right 1" The opening degree of the ventilation doors 32, 33 is controlled according to the difference in position, and the amount of air blown toward the driver's seat side is increased.

Conversely, if the solar radiation to the passenger seat side is stronger than the solar radiation to the driver seat side, the amount of air blown to the passenger seat side is determined to be large. Therefore, both the driver and the assistant receive an appropriate amount of air blown out in response to changes in air conditioning conditions due to differences in solar radiation.

Further, although the operation of the air distribution doors 32 and 33 is reversed from the above explanation, it goes without saying that the air flow is controlled in accordance with the difference in the amount of solar radiation even during heating.

In addition, in the above embodiment, the pentillation tact 10a
Although ventilation doors 32 and 33 were provided for each of the heater tact lla and the heater tact lla, a single ventilation door was used for both takt (10a).

It is also possible to control the air volume of air 11a. 4th degree 5th
The figures are schematic configuration diagrams showing main parts of other embodiments of the vehicle air conditioner according to the present invention, viewed from different sides.

In the figure, the ventilation door 43 is installed immediately after the heater core 8, and since the ventilation door 43 is continuously formed with a guide wall 44 so as to divide the air flow path into two, the ventilation tact The air volume of both the heater tact 10a and the heater tact lla can be controlled by a single air distribution door 43.

〔Effect of the invention〕

As explained above, the present invention is advantageous in that both the driver's seat and the passenger's seat are related to the solar radiation direction, for example, when heating, the amount of air blown on the solar radiation side is reduced, and when cooling, the amount of air blown on the solar radiation side is increased. Therefore, it is possible to correct the air conditioning conditions due to differences in solar radiation, and this has excellent effects such as providing comfortable living conditions regardless of the passenger position within the vehicle interior.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a vehicle showing an example of how a solar radiation sensor used in the vehicle air conditioner of the present invention is attached to the vehicle, and FIG. 2 is an internal configuration of the vehicle air conditioner of the present invention. FIG. 3 is a schematic configuration diagram showing one embodiment of the invention, FIG. 3 is a circuit diagram showing an example of a circuit used in the vehicle air conditioner shown in FIG. 2, and FIGS. It is a schematic block diagram which shows the principal part of another Example of an air conditioner seen from a different side. 4... Floor fan, 5... Compressor, 6...
Evahorake, 8... Heater core, 9, 10.11.
Air outlet, 307 + 3Or... solar radiation sensor, 3
1... Vehicle air conditioner, 32, 33.43...
Air distribution door, 34...control circuit.

Claims (3)

[Claims] (1) A blowing means for sending temperature-controlled air into the outside and inside the room; a plurality of outlets for blowing the air sent from the blowing means to various locations within the vehicle interior; and detecting the amount of solar radiation at various locations within the vehicle interior. An air conditioner for a vehicle, comprising: a plurality of solar radiation sensors; and a control means for changing the amount of air sent to each of the plurality of air outlets according to the outputs of the plurality of solar radiation sensors. (2) The control means includes a ventilation door that changes the amount of air sent to each of the plurality of air outlets, and an operation that calculates the opening degree of the ventilation door based on outputs from the plurality of solar radiation sensors. An air conditioner for a vehicle according to claim 1, characterized in that it comprises means. (3) The ventilation door changes the ratio of air sent to the air outlets L+ provided on the left and right sides of the vehicle;
3. The air conditioner for a vehicle according to claim 2, characterized in that the air conditioner is configured to change the proportion of air sent to the air vents provided at the top and bottom of the vehicle.