JPS59109413A - Car air conditioner combined with smoke detector - Google Patents

Abstract

PURPOSE:To improve response, by a method wherein a smoke detector is positioned on a path running from the air outlet of a defroster to the rear of a car room through a car ceiling, and in response to a signal from an oscillator for responding to the use of a smoking device mounted to a car room, a defroster is adapted to be brought to a blow-off mode. CONSTITUTION:When a switch 20 for responding to the use of a cigarette lighter or a switch 21 for responding to drawing out of an ash tray is operated, the contact of a relay 22 is closed, a blast motor 8 is charged with a micro-current irrespective of operation of a manual switch 11 to cause an air conditioner to generate an air flow. With electromagnetic valves 16 and 18 energized, diaphragm actuators 17 and 19 are operated and dampers 9 and 10 are driven to bring a defroster into a blow off mode. Thus, smoke particles 23, in a car room flows as shown by an arrow mark, to the rear through the ceiling of a car room, and is concentrated on a smoke detector 1. This enables the smoke detector to be reliably actuated to operate an air cleaning device 5, resulting in improvement of the response of a device.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automotive air conditioner combined with a smoke detection device.

Providing a smoke detection device in an automobile cabin is advantageous in that the electric signal thereof can automatically operate an air purification device or a device for setting an air conditioner to an outside air intake mode for ventilation.

However, this smoke detection device has a problem in that its response ability changes depending on its mounting position. This is often caused by the state of the airflow within the vehicle interior or the position of the smoker.

The present invention focuses on the above problems and aims to solve them.

For this reason, the present invention arranges a smoke detection device in a path from the ceiling of the vehicle interior to the rear of the vehicle interior, and utilizes the air blowing characteristics of the air conditioner to provide high detection sensitivity in the air path where the smoke detection device is located. It is characterized by an active generation of airflow when required, i.e. during use of the smoking device.

Generally, an air conditioner for an automobile is equipped with an air outlet selection device and an air flow rate adjustment device, which are connected to an electric circuit that responds to an electric signal from a signal generator that generates an electric signal in response to the use of a smoking device. The above air flow can be generated by controlling the air flow.

In the present invention, the air flow for smoke detection is made to pass from the defroster outlet of the air conditioner through the ceiling of the vehicle interior, which has the effect of increasing detection sensitivity in accordance with the rising nature of cigarette smoke.

FIG. 1 shows an embodiment of the invention. In this figure, the smoke detection device 1 is placed close to the air purification device 2, but it can also be placed at its air inlet or at other locations within the vehicle interior. As the smoke detection device 1, a known photo-electric conversion type or chemical reaction type can be used. According to this embodiment, the signal generated by the smoke detection device 1 is amplified by the amplifier circuit 3, and when the smoke concentration exceeds a preset value, the relay 4 is closed and the blower motor of the air purification device 2 is activated. 5 is to be activated. Reference numeral 6 indicates the main suction valve of the air purifying device 2.

10 indicates an air conditioner placed in the front part of the vehicle compartment,
This air conditioner 10 includes a blower motor 8 and an outlet selection damper 9.
．． It has a publicly known configuration including 10. Air blower motor 8
is connected to an air flow rate regulator 15 that is a combination of a manual switch 11 and current limiting resistors 12, 13, and 14. Further, the damper 9 is movable between the solid line position and the broken line position by a diaphragm actuator 17 connected to a solenoid valve 16 for introducing air pressure. Similarly, the damper 10 is movable between the solid line position and the broken line position by a diaphragm actuator 19 connected to a solenoid valve 18 for introducing air pressure. These dampers can be selected from a defroster blowing mode (D), a heater blowing mode (H), and a vent blowing mode (V) by an electric circuit or a manual operation mechanism (not shown).

According to the invention, an electric switch 20 responsive to the operation of the cigarette lighter as a smoking implement and an electric switch 21 responsive to the ashtray drawer are provided, and these switches are connected in parallel to actuate the energizing coil of the solenoid valve 16.18. It is connected with. In addition, this switch 20.21 is connected to the air flow rate regulator 15.
It is also connected to the energizing coil of the control relay 22, which has contacts connected to one resistor 12 of the control relay 22.

In the above configuration, when at least one of the switches 20 and 21 is closed, the relay 22 is energized and closes its contacts, so that the blower motor 8 resists resistance even if the manual switch 11 is in the open position. 12.13.14
A small current is passed through the air conditioner 7 to generate an air flow. Further, when the solenoid valve 16.18 is energized, the diaphragm actuator 17.19 is activated to drive the damper 9 and 1O, thereby realizing the defroster blowing mode.

Therefore, the smoke particles 23 generated in the vehicle interior are moved toward the smoke detection device 1 along the air flow from the air conditioner 7 to the rear of the vehicle interior, as indicated by the arrow.

When smoke particles are detected in the detection device 1, the air purification device 5 is activated.

FIG. 2 illustrates a modification of the above embodiment in which the electric switch 20A 120B responsive to the cigarette lighter operates as a dual switch, and similarly the ashtray switch 21A,
21B also operates as a double switch, and among the switches, switch 2 with rAJ added to the code
The blower motor is operated at a small air volume by OA and 21A, and the electromagnetic valves 16 and 18 are operated by switches 21A and 21B, which are marked with the symbol rBJ.

As described above, the present invention generates an air flow in the path passing through the ceiling of the passenger compartment when smoking tools are used, so it is possible to increase the sensitivity of the smoke detection device placed in that path, and it also directs smoke toward the rear of the passenger compartment. It has an excellent effect of being able to heal.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram showing one embodiment of the present invention, and FIG. 2 is an explanatory diagram of a partial modification of the embodiment in FIG. 1...Smoke detection device, 7...Air conditioner, 8...Blower motor, 9.10...Outlet selection damper, 15...
・Blow volume regulator, 17.19...Diaphragm actuator, 2. 0121...Electric switch responsive to use of smoking implement, 22...Control relay. Representative Patent Attorney Takashi Okabe

Claims (1)

[Scope of Claims] A smoke detection device disposed in a path from a defroster outlet at the front of an automobile cabin to a rear part of the vehicle cabin through the ceiling of the cabin; an outlet selection device disposed in the front part of the vehicle cabin; a signal generator that generates an electrical signal in response to use of a smoking utensil provided in the passenger compartment; An air conditioner for an automobile combined with a smoke detection device, comprising: an electric circuit that controls an air outlet selection device and an air flow rate adjustment device to generate a defroster airflow of evening airflow from the air conditioner.