JPS592643B2 - Automotive air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an air conditioner for an automobile that includes air conditioning units at the front and rear of the vehicle.

Conventional automotive air conditioners have air conditioning units at the front and rear of the vehicle, and the desired temperature settings for each air conditioning unit can be controlled using operation switches generally mounted on the instrument panel. There is.

However, in this type of air conditioning system, the temperature is adjusted by the front air conditioning unit, and the temperature distribution state in the vehicle interior is determined to be approximately one temperature state depending on the setting conditions of the front air conditioning unit, and each passenger It has been difficult to simultaneously satisfy differences in temperature requirements caused by differences among people.

In particular, when comparing the driver and the rear seat passengers, there is generally a difference in the amount of exercise they do while riding, so it is natural that there will be differences in the desired ambient temperature, as well as differences in gender, age, clothing, etc. Also, since there are differences in the temperature at which the most comfortable feeling can be obtained depending on the individual, it has been difficult to satisfy the different demands of individual passengers at the same time.

The present invention has been made in view of the above points, and is an automotive vehicle that allows the front and rear air conditioning units of the vehicle to be adjusted to the most comfortable temperatures for front and rear seat occupants, respectively, within a certain range using operation switches. The purpose is to provide air conditioning equipment.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a schematic side view of the interior of an automobile equipped with the device of the present invention.

A front air conditioning unit 2 arranged at the front of the vehicle 1 blows out cold air 6 or warm air 7 around the front seats 5 by operating a front operation switch 4 provided on an instrument panel 3. A rear air conditioning unit 8 arranged at the rear of the vehicle is operated by a front operation switch 4 and a rear operation switch 9 provided at the back of the front seat 5 to blow cold air 11 or hot air 12 around the rear seat 10. It's supposed to blow out.

That is, the front operation switch 4 changes the temperature of the air blown from the front and rear air conditioning units 2 and 8, and the rear operation switch 9 changes the temperature of the air blown from the rear air conditioning unit 8.

FIG. 2 shows a circuit diagram of an embodiment of the device of the present invention.

In the figure, 21a to 21d are four interlocking air conditioner play switches provided on the front operation switch 4, including a front mode contact Fa and a multimode contact M of the switch 21a.
a and separate mode contact Sa are connected to the power supply circuit 22, and front mode contact Fb, multimode contact Mb, and separate mode contact sb of switch 21b are temperature setters for setting the control temperature target value around the front seats. 23, and the multi-mode contact Mc and separate mode contact Sc of the switch 21c are connected to the power supply circuit 22, and the multi-mode contact Md of the switch 21a is connected to the front seat temperature setting device 23, and the separate mode contact S
d are connected to the output terminals of the control amplifiers 25 and 26 of the gate circuit 24, respectively.

Front mode contact Fc of switches 21c and 21d,
Fd is not connected to either.

In addition, this device is equipped with a mode setting device (not shown) for selecting the blowout mode of each air conditioning unit 2, 8, such as the cooler, heater, pie level, etc.

27 is a control amplifier for the front air conditioning unit 2 which is connected to the power supply circuit 22 via the switch 21a, and the front seat temperature setting voltage VTF from the temperature setting device 23 is introduced as the control temperature target value via the switch 21b. A signal from a front-seat room temperature sensor 28 installed around the front seat is guided thereto.

29 is a transducer that converts the electrical output signal of the control amplifier 27 into negative pressure, and 30 is a power servo that converts the negative pressure into mechanical force.

The power servo 30 is mechanically connected to the air mix door 31 of the front air conditioning unit 2 by a link or the like, and controls the degree of door opening according to an input signal.

The amount of variation in the power servo 30 is fed back to the control amplifier 27.

Reference numeral 32 designates a control amplifier for the rear air conditioning unit 8 which is connected to the power supply circuit 22 via the switch 21c except in the front mode, and which controls the temperature setting voltage VTF from the front seat temperature setting device 23 via the switch 21a as described later. Alternatively, the rear seat temperature setting voltage VTR from the rear seat temperature setting device 38 is guided as the control temperature target value, and the signal from the rear seat room temperature sensor 33 installed around the rear seat is also guided.

34 is a transducer, 35 is a power servo, and 36 is an air mix door, which are configured in the rear air conditioning unit 8 in the same manner as described above.

37 is a negative pressure link that supplies negative pressure to the transusers 29 and 34.

39 is a sensitivity 1-detection circuit which adds and subtracts the front seat temperature setting voltage VTF from the front seat temperature setting device 23, which is one input, and the converted voltage Va of the temperature variable range ΔT from the DC power supply 45, respectively. An adder 40, a subtracter 41, a comparator 42.43 that compares these outputs with the rear seat temperature setting voltage VTR from the rear seat temperature setter 38, which is another input, and the output of the comparator 42.43. Derive the logical product of A, N
It consists of a D gate 44.

In the gate circuit 24, the input terminal of the control amplifier 25 is connected to the output terminal of the temperature setting device 23, and the input terminal of the control amplifier 26 is connected to the output terminal of the temperature setting device 38, respectively.

Further, the output terminal of the AND gate 44 of the separate detection circuit 39 is connected to the control terminal of the control amplifier 25 via an inverter 46, and the output terminal of the AND gate 44 is directly connected to the control terminal of the control amplifier 26. .

Next, the operation of the apparatus of the above embodiment will be explained.

After setting the air conditioning units 2 and 8 to the same blowout mode, when the air conditioner play switches 21a to 21d are set to the front mode, the front mode contact Fa=Fd is connected, and the control amplifier 27 supplies power from the power supply circuit 22. The temperature setting voltage Vrp, which is the control temperature target value converted into the voltage from the temperature setting device 23, the signal from the front seat room temperature sensor 28, and the feedback signal from the power servo 30 are used to control the temperature setting voltage Vrp.

As a result, the control amplifier 27 operates the power servo 30 and controls the opening degree of the air mix door 31 so that the air blown from the front air conditioning unit 2 reaches the target temperature around the front seat.

In other words, in the front mode, the front air conditioning unit 2
Only by increasing the front seat temperature setting voltage VTF to the control temperature target value, temperature control is performed mainly around the front seat.

When the air conditioner play switches 21a to 21d are switched to the multimode mode, the multimode contacts Ma to Md are connected, and the control amplifier 27 and the control amplifier 32 are both supplied with power from the power supply circuit 22 and enter the operating state, and the temperature setting device 23 The temperature setting voltage VTF is derived.

The control amplifier 27 is controlled by the voltage VTF, the signal from the front seat room temperature sensor 28, and the feedback signal from the power servo 30 in the same way as above, and the transducer 2
The power servo 30 is operated via 9.

The control amplifier 32 similarly controls the voltage VTF and the rear room temperature sensor 3.
3 and a feedback signal from the power servo 35, and operates the power servo 35 via the transducer 34.

Power servos 30° and 35 are connected to front air conditioning unit 2 respectively.
, the opening degrees of the air mix doors 31 and 36 are controlled so that the air blown from the rear air conditioning unit 8 reaches the target temperature around the front seats and around the rear seats.

In other words, in multi mode, the front and rear air conditioning units 2
, 8, temperature control is performed in the front and rear seats using the temperature setting voltage VTF as the control temperature target value.

Next, when the air conditioner play switches 21a to 21d are switched to separate mode, separate mode contact 5a=S
d is connected, and the control amplifier 27 operates with the power supply circuit 22 and temperature setting device 23 connected in the same manner as described above, and performs temperature control so that the temperature of the air blown from the front air conditioning unit 8 becomes TF. 32 is connected to the power supply circuit 22 and to the output terminals of amplifiers 25 and 26 of the gate circuit 24.

In separate mode, the rear seat temperature setting voltage VTR
is relative to the front seat temperature setting voltage V'rF, the separate detection circuit 39 uses the signal from the adder 40° and the subtracter 41, and the comparator 42.
a, VTR, ≧VTF Va is performed, and when these conditions are satisfied, the outputs ``1'' from the comparators 42 and 43 are both guided to the AND gate 44, and the AND gate 44 is connected to the control amplifier 26. The output +41 ?+ is sent to the control terminal of and impark 46.

, the comparators 42 and 43 respectively
+V a , VTR, ≧■TF-■a is compared, and since one of these conditions is not satisfied, the outputs from comparators 42 and 43 are +111+, respectively.
.

u On or °0" l+ 111 is AND gate 44
, AND gate 44 sends the control terminal of control amplifier 26 and inverter 46 output 11011.

When the rear seat temperature setting voltage VTR is under the condition of equation (1), a signal of 1'' is applied from the AND gate 44 of the separate detection circuit 39 to the control terminal of the control amplifier 26 of the gate circuit 24, and the control amplifier A signal of 0'' is applied to the control terminal 25 through an inverter 46.

Therefore, only the control amplifier 26 is in the operating state, and the temperature setting voltage VTR from the temperature setting circuit 38 is applied to the control amplifier 26.
It is applied to the separate mode contact Sd of the air conditioner play switch 21d through the air conditioner play switch 21d.

In addition, the rear seat temperature setting voltage VTR, is expressed by the above formula (2) or (
3) Under the condition of formula, the control amplifier 26 of the gate circuit 24 from the AND gate 44 of the separate detection circuit 39
A signal of 0'' is applied to the control terminal of the control amplifier 25, and a signal of 1'' is applied to the control terminal of the control amplifier 25 through the inverter 46.

Therefore, only the control amplifier 25 is put into operation, and the temperature setting voltage VTF from the temperature setting device 23 is applied to the separate mode contact Sd of the air conditioner spray switch 21d through the control amplifier 25.

When the rear seat temperature setting voltage VTR is applied to the separate mode contact Sd, this setting voltage VTR is guided to the control amplifier 32 as the control temperature target value, and the control amplifier 32
Signals from TR and rear seat room temperature sensor 33 and power servo 3
5, the power servo 35 is operated via the transducer 34, and the power servo 35 controls the door opening degree of the air mix door 36 so that the temperature of the air blown from the rear air conditioning unit 8 becomes TR. do.

Further, when a set voltage VTF is applied to the separate mode contact Sd, this set voltage VTF is led to the control amplifier 32 as a control temperature target value, and the control amplifier 32 is controlled simultaneously in the multi mode.

In other words, in the separate mode, when the rear seat temperature setting voltage VTR is under the condition of equation (1) above, that is, the temperature difference between the rear seat temperature setting voltage VTR and the front seat temperature setting voltage VTF is ±Va. When selected within the range, the front air conditioning unit 2 controls the temperature around the front seats using the set voltage V'l'F as the control temperature target value, and the rear air conditioning unit 8 controls the area around the rear seats at the set voltage VTR. The temperature is controlled as the control temperature target value.

In addition, when the rear seat temperature setting voltage VTR is under the condition of formula (2) above, that is, when the rear seat temperature setting voltage VTR is selected to be a value that is more than a temperature difference from the front seat temperature setting voltage VTF. As in multimode,
The temperatures around the front seats and rear seats are controlled by the respective air conditioning units 2 and 8 using the front seat temperature setting voltage TF as a control target value.

As described above, according to the device of the present invention, the temperature of the air blown out from the air conditioning units installed at the front and rear of the vehicle can be set by the front seat occupant, and the rear seat passenger can also set the temperature in the front seat. The temperature of the air blown from the rear air conditioning unit can be adjusted within a certain range, allowing both front seat passengers and rear seat passengers to choose the most comfortable conditions. have

[Brief explanation of drawings]

FIG. 1 is a schematic side view of the interior of an automobile equipped with the device of the present invention, and FIG. 2 is a circuit configuration diagram of an embodiment of the device of the present invention. 2...Front air conditioning unit, 4...
Front operation switch, 8...Rear air conditioning unit, 21a-21d...Air conditioner play switch, 22...Power circuit, 23.38...
・Temperature setting device, 24...Gate circuit, 25-2
6...Control amplifier, 27°32...Control amplifier, 28.33...Room temperature sensor, 29.
34...Transducer, 30,35...
...Power servo, 31, 36...Air mix door, 37...Negative pressure tank, 39...
...Separate detection circuit, 40...Adder, 4
1...Subtractor, 42°43...Comparator, 44...AND gate, 46...Inverter.

Claims (1)

[Scope of Claims] 1. It has a front air conditioning unit, a rear air conditioning unit, a front seat temperature setting device, and a rear seat temperature setting means, and at least the front seat temperature setting device is connected to the front air conditioning unit. Equipped with an operation switch for switching between a mode in which the temperature of the outlet air is controlled and a mode in which the rear seat temperature setting means is connected to the rear air conditioning unit and the outlet air temperature is controlled independently of the front air conditioning unit. An air conditioner for automobiles characterized by: 2. It has a front air conditioning unit, a rear air conditioning unit, a front seat temperature setting device, and a rear seat temperature setting means, and at least the front seat temperature setting device is connected to the front air conditioning unit to control the temperature of the air blown out. and a mode in which the rear seat temperature setting means is connected to the rear air conditioning unit and the temperature of the outlet air is controlled independently of the front air conditioning unit. teeth,
When the target temperature difference between the rear seat temperature setter, front seat temperature setter and rear seat temperature setter is within a predetermined range, the target value of the rear seat temperature setter is output, and when it is outside the predetermined range, the front seat temperature is output. An air conditioner for an automobile, comprising: a control circuit that outputs a target value of a setting device.