JPS625084B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to an air conditioner for an automobile, which includes air conditioning units at the front and rear of the vehicle. Conventional automotive air conditioning systems have air conditioning units at the front and rear of the vehicle, and by operating a mode selection lever on the instrument panel, the mode of the front and rear air conditioning units can be set to control the air conditioning of the vehicle interior. I was doing it. In this type of device, the front and rear air conditioning units are operated in roughly the same mode, but by operating the mode selection lever,
When the defroster mode is selected, the front air conditioning unit is operated to correspond to the defroster mode, but the rear air conditioning unit normally does not operate at all. Using a defroster is necessary for the vehicle to run, but
For this reason, there is a drawback that a heater is not used, which impairs the sense of comfort for the occupants. (Refer to Japanese Utility Model Publication No. 49-15083) In view of this point, the present invention operates the defroster in the front air conditioning unit when the defroster mode is selected with the mode selection lever, while the rear air conditioning unit, which previously did not operate, operates the defroster in the front air conditioning unit. The unit operates a heater to defog the front window glass and heat the interior of the vehicle at the same time. The present invention will be explained below with reference to FIGS. 1 to 4. In Fig. 1, 1 is the car body, 2 is the air conditioning unit installed below the instrument panel 3, 4 is the rear air conditioning unit installed below the rear parcel shelf, and 5 is the front side of the instrument panel 3. A mode selection device is provided. FIG. 2 shows details of the front air conditioning unit 2 and the rear air conditioning unit 4. 6 is the duct of the front air conditioning unit 2, 7, 8
are each an outside air intake opening at one end of the duct,
An inside air intake port, 9 an inside/outside air switching door that switches between inside and outside air intakes, 10 a blower that takes inside and outside air into the duct 6, 11 a motor that drives the blower 10,
12 is an evaporator that cools the air taken into the duct 6; 13 is a heater core that heats the air taken into the duct 6; 14 is an air mixture chamber provided at the other end of the duct 6; and 15 is an air mixer that is taken into the duct 6. The air passing through the heater core 13 and the air passing through the heater core 13,
An air mix door that appropriately distributes this air to bypass air and mixes these airs in the air mix chamber 14; 16 is a ventilator side opening that opens in a part of the air mix chamber 14;
1 is a ventilator duct whose base is connected to the opening 16; 18 is a ventilator outlet opening on the front surface of the instrument 3; 19 is a ventilator door that opens and closes the opening 16; 20 is a lever pivoted on the rotating shaft of the ventilator door 19; is a vacuum actuator that drives the ventilator door 19;
2 is a rod that connects the lever 20 and the actuator 21; 23 is a solenoid valve that switches the supply of negative pressure or atmospheric pressure to the actuator 21; 24 is a pipe that connects the actuator 21 and the solenoid valve 23;
5 is a pipe connecting the solenoid valve 23 and the vacuum tank (described later), 26 is a wiring that supplies power to the solenoid coil (described later) of the solenoid valve 23, and 27 is a heater side that opens into a part of the air mixture chamber 14. An opening, 28 is a heater door that opens and closes the opening 27, 29
3 is a lever pivotally supported on the rotating shaft of the heater door 28;
0 is a vacuum actuator that drives the heater door 28, and 31 is a lever 29 and actuator 3.
0 is connected to the rod, 32 is the actuator 30
A solenoid valve that switches the supply of negative pressure or atmospheric pressure to
33 is a pipe that connects the actuator 30 and the solenoid valve 32, 34 is a pipe that connects the solenoid valve 32 and the vacuum tank, 35 is a wiring that supplies power to the solenoid coil (described later) of the solenoid valve 32, and 36 is an air mixer. 37 is a defroster duct whose base is connected to the opening 36; 38 is a windshield; 39 is a defroster nozzle provided at the tip of the defroster duct 37; It is open along the upper surface of the instrument panel 3. 40 is a defroster door that opens and closes the opening 36;
Reference numeral 1 denotes a lever pivotally supported on the rotation shaft of the defroster door 40, 42 a vacuum actuator that drives the defroster door 40, 43 a rod that connects the lever 41 and the actuator 42, and 44 a negative or large pressure applied to the actuator 42. A solenoid valve 45 is an actuator 42 and a solenoid valve 4 for switching the supply of air pressure.
4, a pipe that connects the solenoid valve 44 and the vacuum tank, 47, a solenoid valve 44
This is the wiring that supplies power to the electromagnetic coil (described later). 48 is the duct of the rear air conditioning unit 4;
49 is an air intake port opened at one end of the duct 48;
50 is a blower that takes air into the duct 48;
1 is a motor that drives the blower 50; 52 is an evaporator that cools the air taken into the duct 48;
53 is a heater core that heats the air taken into the duct 48, 54 is an air mix chamber provided at the other end of the duct 48, and 55 is a heater core that connects the air taken into the duct 48 to the air passing through the heater core 53 and bypassing it. 56 is a ventilator side opening that opens in a part of the air mixture chamber 54; 57 is a ventilator duct whose base is connected to the opening 56; , 58
is a ventilator outlet that is located at the tip of the ventilator duct 57 and opens into the rear parcel shelf;
59 is a ventilator door that opens and closes the opening 56;
0 is a lever pivotally supported on the rotating shaft of the ventilator door 59, 61 is a vacuum actuator that drives the ventilator door 59, 62 is a rod that connects the lever 60 and the actuator 61, and 63 is a lever that applies negative or large pressure to the actuator 61. A solenoid valve that switches the supply of air pressure, 64 a pipe that connects the actuator 61 and the solenoid valve, 65 a pipe that connects the solenoid valve 63 and the vacuum tank, and 66 that powers the solenoid coil (described later) of the solenoid valve 63. 67 is a heater side opening opened in a part of the air mix chamber 54, 68 is a heater duct whose base is connected to the opening 67, 69 is a heater outlet opening into the room, and 70 is a heater door that opens and closes the opening 67. , 71 is a lever pivotally supported on the rotating shaft of the heater door 70, 72 is a vacuum actuator that drives the heater door 70, 72a is a rod that connects the lever 71 and the actuator 72, and 73 is a vacuum actuator that applies negative pressure or air pressure to the actuator 72. A solenoid valve 74 switches the supply of the actuator 72 and the solenoid valve 7.
3, 75 is a pipe that connects the solenoid valve 73 and the vacuum tank, and 76 is a wiring that supplies power to an electromagnetic coil (described later) of the solenoid valve 73. Next, in Figure 3, each of the above doors, 19, 28, 40,
A specific example of an electric circuit diagram for driving 59 and 70 is shown. In the figure, 77 is a power supply, 78 is a group of switches operated by mode selection operation of a mode lever (not shown), 79a is a ventilation switch, 79 is a cooler switch, 80 is a bi-level switch, 81 is a heater switch, 82 is a is the defroster switch. Each switch 79a, 79, 8
0, 81, and 82 are connected in parallel to the power supply 77. 8
3 is a first OR circuit whose input side is connected to a cooler switch 79 and a bilevel switch 80;
84 is a second OR circuit whose input side is connected to the bilevel switch 80 and the heater switch 81; 85;
86 is the third OR circuit whose input side is connected to the heater switch 81 and the defroster switch 82, 86 is the fourth OR circuit whose input side is connected to the cooler switch 79 and the bi-level switch 80, and 87 is the input side which is connected to the by-level switch 80. Level switch 80 and heater switch 81
5th OR circuit connected to 88, the input side is connected to 5th OR circuit.
This is a sixth OR circuit connected to the output side of the OR circuit and the defroster switch 82. 89 is an electromagnetic coil of the electromagnetic valve 23, 90 is an electromagnetic coil of the electromagnetic valve 32, 91 is an electromagnetic coil of the electromagnetic valve 44, 92 is an electromagnetic coil of the electromagnetic valve 63, and 93 is an electromagnetic coil of the electromagnetic valve 73. ,90,91,92,
93 is connected in parallel to the power supply 77. 94 is the first
A first switching circuit 95 is connected to the output side of the OR circuit and the electromagnetic coil 89, and a second switching circuit 95 is connected to the output side of the second OR circuit 84 and the electromagnetic coil 90.
96 is the third OR circuit 85
97 is a fourth switching circuit connected to the output side of the fourth OR circuit 86 and the electromagnetic coil 92; 98 is a fourth switching circuit connected to the output side of the fourth OR circuit 86 and the electromagnetic coil 92; This is a fifth switching circuit connected to the output side and the electromagnetic coil 93. In addition, ventilation switch 79a
is directly connected to the first switching circuit 94.
Reference numeral 101 is a switch for cutting off the heater circuit when the defroster is necessary but the heater is not needed, such as during the rainy season. FIG. 4 shows a detailed diagram of the drive system for the opening/closing door. Since each drive system has the same configuration, only the drive system for the ventilator door 19 of the front air conditioning unit 2 is shown as a representative. 99 is an atmosphere opening port of the solenoid valve 23. 100
is a vacuum tank, and although it is only connected to the solenoid valve 23 in the figure, it is connected to the other solenoid valves 32, 44, and 6.
Of course, it is also connected to 3 and 73. Next, the operation of the present invention will be explained. First, when the occupant operates the mode selection lever and sets it to the cooler mode position, the cooler switch 7
9 is turned on, and the signal current from the power supply 77 becomes the first
The current is input to the OR circuit 83 and further transmitted to the first switching circuit 94, and by the action of the switching circuit 94, current flows from the power supply 77 to the electromagnetic coil 89, the electromagnetic valve 23 is operated, and the vacuum tank 1
00 to the vacuum actuator 21 to drive the ventilator door 19 and open the ventilator side opening 16 of the front air conditioning unit 2. At the same time, the signal current is input to the fourth OR circuit 86 and further transmitted to the fourth switching circuit 7, and by the action of the switching circuit 97, the power supply 7
7 to the electromagnetic coil 92, the electromagnetic valve 63
operates, supplies negative pressure from the vacuum tank 100 to the vacuum actuator 61, drives the ventilator door 59, and closes the rear air conditioning unit 4.
Open the ventilator side opening 56. Since no current flows through the other electromagnetic coils 90, 91, 93, each door 28, 40, 70 is not driven, and the opening 27,
36 and 67 remain closed. In this way, the opening positions of the conditioned air outlets of the front and rear air conditioning units 2 and 4 corresponding to the cooler mode are determined, and the rest of the vehicle interior is cooled by known means. Next, when the mode selection lever is set to the bilevel position, the bilevel switch 80 is turned on.
The signal current from the power supply 77 is connected to the first OR circuit 83,
The second OR circuit 84, the fourth OR circuit 86, the fifth
Input to OR circuit. As before, the signal current output from the first OR circuit 83 is transmitted to the first switching circuit 94, and the operation of the switching circuit 94 causes current to flow through the electromagnetic coil 89 of the electromagnetic valve 23 to drive the drive system. Then, open the ventilator side opening 16 of the front air conditioning unit 2, and open the second OR.
The second switching circuit 95 is activated by the signal current output from the circuit 84, current flows through the electromagnetic coil 90 of the electromagnetic valve 32, the drive system is driven, and the heater side opening 27 of the front air conditioning unit 2 is opened. The fourth switching circuit 97 is activated by the signal current output from the fourth OR circuit 86, and current flows through the electromagnetic coil 92 of the electromagnetic valve 63, driving the drive system and opening the ventilator side opening of the rear air conditioning unit 4. 56 is opened, the signal current output from the fifth OR circuit 87 is input to the sixth OR circuit 88,
Furthermore, the fifth switching circuit 98 is actuated by the signal current output from the sixth OR circuit, and current flows through the electromagnetic coil 93 of the electromagnetic valve 73 to drive the drive system and open the heater side opening 67 of the rear air conditioning unit 4. open it. In this way, the opening positions of the conditioned air blowouts of the front and rear air conditioning units 2 and 4 corresponding to the bilevel mode are determined, and other known means are used to keep the occupants in the vehicle cabin cool and warm. Further, when the mode selection lever is set to the heater position, the heater switch 81 is turned on, and the signal current is input to the second OR circuit 84, the third OR circuit 85, and the fifth OR circuit 87. Second OR circuit 84
The second switching circuit 95 is activated by the signal current output from the solenoid valve 32, and the solenoid coil 9 of the solenoid valve 32 is activated.
0 flows, driving the drive system, opening the heater side opening 27 of the front air conditioning unit 2, and opening the third
The third switching circuit 96 is actuated by the signal current output from the OR circuit 85, current flows through the electromagnetic coil 91 of the electromagnetic valve 44, the drive system is driven, and the defroster side opening 36 of the front air conditioning unit 2 is opened. , the signal current output from the fifth OR circuit 87 is input to the sixth OR circuit 88, and the signal current output from the fifth OR circuit 87 is input to the sixth OR circuit 88.
The fifth switching circuit 98 is actuated by the signal current output from the circuit 88, and current flows through the electromagnetic coil 93 of the electromagnetic valve 73, driving the drive system and opening the heater side opening 67 of the rear air conditioning unit 4. In this way, the opening position of the conditioned air outlet of the front and rear air conditioning units 2, 4 corresponding to the heater mode is determined, and the other openings 27, 67 on the heater side of the front and rear air conditioning units 2, 4 are determined by known means.
A large amount of warm air is blown into the vehicle interior to heat the vehicle interior, and at the same time, a small amount of warm air flows out from the defroster side opening 36 to defog the windshield 38. Furthermore, when the mode selection lever is set to the defroster position, the defroster switch 82 is turned on, and the signal current is input to the third OR circuit 85 and the sixth OR circuit 88. The signal current output from the third OR circuit 85 causes the third switching circuit 96 to
is activated, current flows through the electromagnetic coil 91 of the electromagnetic valve 44, drives the drive system, and opens the defroster side opening 36 of the front air conditioning unit 2, while the sixth
The fifth switching circuit 98 is actuated by the signal current output from the OR circuit 88, and current flows through the electromagnetic coil 93 of the electromagnetic valve 73, driving the drive system and opening the heater side opening 67 of the rear air conditioning unit 4. In this way, the positions of the conditioning air outlet openings of the front and rear air conditioning units 2 and 4 corresponding to the defroster mode are determined, and a large amount of warm air flows out from the defroster side opening 36 of the front air conditioning unit 2, thereby preventing the windshield 38 from fogging. A large amount of warm air is blown into the vehicle interior from the heater side opening 67 of the rear air conditioning unit 4, heating the vehicle interior. When the other mode selection lever is set to the ventilation position, the ventilation switch 7
9a is turned on, current flows through the electromagnetic coil 89 of the electromagnetic valve 23, drives the drive system, and opens the ventilator side opening 16 of the front air conditioning unit 2. Otherwise, the vehicle interior is ventilated by known means. The above-mentioned mode selection positions and the opening/closing states of each door of the air conditioning unit are shown in the table below.

[Table] In the present invention, the operation of the front and rear air conditioning units is set as described above, so that when the air conditioning mode is selected, the front and rear air conditioning units perform air conditioning in the vehicle interior in the same mode, and also change the air conditioning mode. When the defroster mode is selected, the front air conditioning unit operates to defog the windshield, while the rear air conditioning unit heats the interior of the vehicle. This solves the problem of sometimes not being able to heat the passenger compartment.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of the automobile, Figure 2 is a system diagram of the front air conditioning unit and rear air conditioning unit, Figure 3 is the electric circuit that operates each opening/closing door of the front and rear air conditioning units, and Figure 4 is An example showing the drive system of each opening/closing door. 2... Front air conditioning unit, 4... Rear air conditioning unit, 79a... Ventilation switch, 79... Cooler switch, 80... Bi-level switch, 81... Heater switch, 82...
Defroster switch, 83, 84, 85, 86,
87, 88...OR circuit, 94, 95, 96, 9
7,98...Switching circuit, 89,90,9
1, 92, 93... Electromagnetic coil.

Claims (1)

[Claims] 1. A front air conditioning unit is provided at the front of the vehicle, and a rear air conditioning unit is provided at the rear, and the front and rear air conditioning units are linked to select a mode using a mode selection lever provided at the front of the vehicle. The air conditioning system for an automobile is characterized in that when a front air conditioning unit is operated to at least a defroster mode by a mode selection lever, a rear air conditioning unit is operated to a heater mode. Air conditioner. 2. A patent characterized in that when the front air conditioning unit is operated in cooler or bi-level heater mode using the mode selection lever, the rear air conditioning unit is operated in the same mode as the front air conditioning unit. An air conditioner for an automobile according to claim 1.