JPS59140119A - Air conditioner for automobile - Google Patents

Abstract

PURPOSE:In an air conditioner interlocked with an air cleaner as operated responsive to an air pollution sensor, to improve durability of a ventilator by interlocking the ventilator connected to the sensor with at least one of a blower motor for the air conditioner and a fan motor for the air cleaner. CONSTITUTION:A smoke sensor 20 for an automobile is constituted of a sensing signal generating section 1 including a light emitting element 3 and a light collecting element 4 and a sensing signal processing circuit section 6, and is located at a central portion of a ceiling near a room lamp. Further, a drive motor 24 for an air suction fan is located in the vicinity of the smoke sensor 20. When a key switch 41 is closed to close a switch 40a of a relay 40 under such condition that a selector switch 33a is in a solid line position where an operation switch 33 of a blower drive motor 32 for an air conditioner is not operated, the motor 24 is energized. On the other hand, when the operation switch 33 is operated to select a dotted line position of the selector switch 33a, the motor 24 is deenergized to allow air flow by the blower of the air conditioner to be induced to the smoke sensor 20.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vehicle air conditioner that is linked to an air purifier that responds to an air pollution sensor.

Recently, air purifiers have been often installed in vehicle interiors to purify the air inside the vehicle (particularly to remove cigarette smoke). Many devices have been devised in which the operation is automatically controlled in response to a detection signal from a sensor that detects air pollution.

However, the state of the air flow inside the vehicle cabin differs greatly between when the air conditioner is operating and when it is not operating, so the detection sensitivity of the air pollution sensor is greatly affected by this, and the detection sensitivity of the air pollution sensor is The detection sensitivity is also greatly influenced by the installation location. Therefore, in order to obtain appropriate detection sensitivity, we selected the most appropriate installation location for the air pollution sensor, and at the same time installed an air suction fan to guide the air around the air pollution sensor to the sensor's detection signal generator. It is conceivable that by providing the air contaminant sensor with such a configuration, a desired sensor detection sensitivity can be obtained regardless of whether the air conditioner is in operation or not. However, due to the size and shape of the sensor and the limited installation space, the drive motor for the air suction fan described above has to be small, so sufficient durability cannot be guaranteed. Iu
A problem with dynamic motors is that it is difficult to operate them continuously. The present invention has been made with the intention of eliminating such inconveniences.

Accordingly, the present invention provides a sensor that has a ventilation device and that detects the level of pollution in the air in the cabin of a vehicle and generates a detection signal, and an air purifier that has an intake/exhaust fan that operates in response to the detection signal of the sensor. In order to further shorten the operation time of the ventilation device of the sensor, the ventilation device, the motor for driving the blower of the air conditioning heating and cooling device, and the air blower are provided. It is an object of the present invention to provide a vehicle air conditioner including an electric circuit that controls in conjunction with at least one of the drive motors of the intake and exhaust fans of a purifier.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the configuration, operation, and effects of the vehicle air conditioner according to the embodiments of the present invention shown in the accompanying drawings will be explained.

First, a smoke sensor for a vehicle used in an embodiment of the present invention will be explained with reference to FIGS. 1, 2, and 6. The vehicle smoke sensor illustrated in those figures is designated generally by the reference numeral 20. It is further divided into a photoelectric conversion type detection signal generation section 1 and a detection signal processing circuit section 6. FIG. 1 and FIG. 2 respectively show a detection signal generating section 1.
The diagram shows an example of the internal configuration of the . The detection signal generating section 1 includes a light emitting element 3 and a light receiving element 4, which are placed in a case 2 in front of a small window, and 5 indicates smoke particles of an object to be detected. . Detection signal generator 1 in Fig. 1
is a light-shielding type, and when the smoke particles 5 block the straight light traveling from the light-emitting element 3 toward the light-receiving element 4, the electric signal generated in the light-receiving element 4 decreases. Furthermore, the detection signal generating section 1 shown in FIG.
However, when reflected by the smoke particles 5, incident light is generated, and the electric signal generated at the light receiving element 4 increases.

Note that block 6 in FIGS. 1 and 2 represents a detection signal processing circuit section.Next, block 6 in FIGS.
Referring to FIG. 6 showing an example of the circuit configuration, the detection signal voltage VS outputted by the light receiving element 4 of the detection signal generating section 1 is sent to the detection signal processing circuit section 6, It is applied to the negative input terminal of comparator 9 in 6.

Comparator 9's power QIM has resistors 10 and 11.
A comparison setting voltage Vc determined by is applied. The detection signal voltage Vs is compared with the comparison setting voltage Vc by a comparator 9, and the output terminal of the comparator 9 receives a comparison output signal So.
occurs. The switches 14 and 15 are closed depending on the usage state of the smoking implement, and connect the resistor 13 in parallel with the resistor 11 to decrease the value of the comparison setting voltage Ve, and set the comparator 9 to the smaller detection signal voltage Vs. This is to respond to the situation.

Next, a case will be described in which the vehicle air conditioner according to the present invention is applied to the cabin of an automobile as shown in FIG. 4, as an example. FIG. 4 schematically shows the state in which each part of the vehicle air conditioner of the present invention is arranged in the vehicle interior of a vehicle, and the state of air flow in the vehicle interior when the vehicle air conditioner operates. It is shown in In FIG. 4, smoke sensor 20
is installed in the center of the ceiling near a room lamp (not shown). 25 is a rear tray with an air outlet 25a and an air inlet 2.
5b, the main body of which is installed in the luggage compartment. When the air conditioning system of the air conditioner of the present invention is operating, the instrument panel 3
Since the blown air is sent from the front air outlet 31 installed at 0 in the direction shown by arrow A, the air near the ceiling also flows, so there is no need for air suction to the smoke sensor 20. However, when the heating and cooling system of the air conditioner is not operating, the air inside the vehicle hardly flows, so it takes several tens of seconds for smoking smoke to reach the sensor 20.
It is necessary to actively suck the surrounding air into the smoke sensor 20.

FIG. 5 shows an enlarged view of the smoke sensor 20 installed in the center of the ceiling of the passenger compartment as shown in FIG. 1- shows the state of air flow when the air suction fan and drive motor 24 are energized at the same time. In the figure, 1 is the second
The figure shows an example of the reflective detection signal generating section 1, in which air sucked by an air suction fan flows through the reflective detection signal generating section 1 so as to obtain the desired smoke sensor detection sensitivity. Indicates the state of

Thus, when the smoke sensor 20 detects dirt in the air and outputs a detection signal of an appropriate magnitude, the air purifier 25 starts operating in response to the air purifier 25, and the air purifier 25 starts operating, and the air purifier 25 starts to operate, and the air purifier 25 starts to operate, and the air purifier 25 starts to operate, and the air purifier 25 starts to operate, and the air purifier 25 starts to operate, and the air purifier 25 starts to operate, and the air purifier 25 starts to operate, and the air purifier 25 starts to operate, and the air purifier 25 starts operating in response to the air contamination. The received air will flow as shown at B in Figure 4.

Next, a description will be given below of the structure and operation of the apparatus of the present invention, which are intended to shorten the operating time of the ventilation device of the vehicle smoke sensor 20.

First, in order to achieve the above object, a sixth embodiment will be described in which the operation of the ventilation device of the smoke sensor 20 and the operation of the blower drive motor of the air conditioning heating and cooling device are electrically linked and controlled.
Explain the diagram.

FIG. 6 shows a control circuit provided as part of the vehicle's electrical circuit to achieve the above purpose, in which 41
shows a key switch of the vehicle, and when the key switch 41 is closed, the electromagnetic switch 40a of the relay 40 is energized, its contacts make a short circuit between the contacts, and power supply voltage is supplied to the power supply side terminal of the changeover switch 33a.

When the operation switch 33 of the blower drive motor of the cooling/heating device of the air conditioner shown by 32 is not operated and its movable contact is in the position shown, the movable contact arm of the changeover switch 33a interlocked with the movable contact is at the position indicated by the solid line in the figure, so the air suction fan drive motor 24 of the smoke sensor 20 is activated by the power supply voltage supplied via the electromagnetic switch 40a.
The smoke sensor 20 is energized, sucks air around the smoke sensor 20, and causes it to flow through the detection signal generating section 1 as shown in FIG.

On the other hand, when the activation switch 33 is operated, the movable contact arm of the changeover switch 33a interlocked with it is switched to the position indicated by the dotted line in FIG. 6 before its movable contact reaches the initial activation position, so that no smoke The air suction fan drive morph 24 of the sensor 20 is deenergized, and then the activation switch 33 is activated.
The movable contact remains in the stopped state until it is operated again to return the movable contact to the stopped position. The above operating switch 33
As a device for interlocking the switch and the changeover switch 33a, there is provided not only a mechanical interlocking device but also a switch that closes at a predetermined position before the activation position of the movable contact when the actuation switch 33 is operated. The entire configuration may be configured by switching between the power supply circuit for the air suction fan and drive motor 24 and the power supply circuit for the blower drive motor 32 of the air conditioning system using an electromagnetic changeover switch that is reduced by the power supply voltage applied through the switch. . In this way, a detection signal is generated by driving the blower of the air conditioning heating and cooling device.
When the air flow that gives the desired detection sensitivity to the part 1 is obtained, the air suction fan drive motor 24 of the smoke sensor 20 is always kept in a stopped state to maintain its durability. Further, according to the configuration of the above-described embodiment, whenever a passenger is in the vehicle and closes the key switch 41, the air around the smoke sensor 20 is absorbed by the detection signal generating section 1.
Therefore, the desired sensitivity of the smoke sensor 20 can be ensured regardless of whether the air conditioner is activated or not.

Another example for achieving the above purpose is the fourth example.
In the figure, if the smoke sensor 20 is installed at an appropriate position where its detection signal generating unit 1 comes into contact with the air flow sent by the air supply/exhaust fan of the air purifier 25 in operation, the above-mentioned results can be achieved. According to the control circuit shown in FIG. 6 in the embodiment, when the air purifier 25 is not operating, the smoke sensor 20 energizes its own air suction fan drive motor 24 to generate the detection signal generator 1. When the smoke sensor 20 detects a predetermined level of dirt in the air inside the vehicle, the air purifier 25 starts operating in response, and at the same time, the air suction fan drive motor 24 is deenergized. It is easy to assemble a control circuit that works. Furthermore, by combining the above control circuit with the control circuit shown in FIG. In one case, it is also possible to assemble a control circuit that serves to de-energize the air suction fan drive motor 24 of the smoke sensor 20.

In the embodiments described above, a configuration is shown in which a motor-driven air suction fan is used as a means for sucking surrounding air into the smoke sensor 20. It is also possible to use an electric wind generating device that generates a charged air flow by utilizing the ion wind phenomenon generated on the surface of a high-voltage electrostatically charged body.

Furthermore, without using the unique ventilation device provided as an accessory device of the smoke sensor 20 as described above, when the air conditioner is not operating, only the blower drive motor 32 of the air conditioning heating and cooling device can be operated in the breeze mode. It is also possible to change the B configuration of the air conditioner so as to set the front air outlet 31 to the defrost mode.

According to the vehicle air conditioner of the present invention described above, it is possible to solve the problem of insufficient durability of the motor for driving the air suction fan for ventilation of the air pollution sensor inside the vehicle cabin, which was considered to be an inconvenience in the conventional technology. , and operation of the vehicle's air conditioning system;
An excellent effect is obtained in that the desired detection sensitivity of the sensor can be obtained regardless of whether it is inactive or not.

[Brief explanation of drawings]

FIG. 1 is a partial cross-sectional view showing an example of the internal configuration of a light-shielding detection signal generating section of a vehicle smoke sensor used in a vehicle air conditioner according to an embodiment of the present invention. FIG. 2 is a partial cross-sectional view showing an example of the internal structure of a reflected light detection signal generating section of a vehicle smoke sensor that is used for the same purpose as the vehicle smoke sensor shown in FIG. FIG. 6 is an electric circuit diagram showing an example of the circuit configuration of the detection signal processing circuit section of the vehicle smoke sensor shown in FIGS. 1 and 2. FIG. FIG. 4 is a schematic explanatory diagram showing the arrangement of each part of a vehicle air conditioner according to an embodiment of the present invention applied to a vehicle interior, as an example, and the state of air flow within the vehicle interior. . FIG. 5 is an enlarged partial sectional view showing the smoke sensor 20 in FIG. 4, the air suction fan drive motor 24 for the sensor, and the state of air flow caused by the operation thereof. FIG. 6 shows a vehicle air conditioning system according to an embodiment of the present invention.
To shorten the operation time of the smoke sensor 20 ventilation device?
1 is an electric circuit diagram showing a circuit configuration for controlling 1ilJ. (Explanation of symbols) 1...Detection signal generation unit of vehicle smoke sensor, 6...Detection signal processing circuit of vehicle smoke sensor, 20... ...Vehicle smoke sensor, 24.
...... Motor for driving the air suction fan of the sub-ambient smoke sensor, 25... Air purifier, 25a... Air purifier outlet , 25b
...... Air purifier suction port, 30...
...Instrument panel, 31...
...Front outlet of air conditioner, 32...
. . . Motor for operating the blower 1117 of the air conditioning heating and cooling system, 33 . . . Operation switch for the air blower 1ffl operation motor 32, 33a . . . Movable 1 concubine for the operation switch 33 40......Relay, 40a......Electromagnetic switch of relay 40,
41・・・・・・・・・Vehicle key switch. Agent Asa I. 4 people

Claims (1)

[Scope of Claims] (lj) An air conditioner for a vehicle, which includes a sensor that has a ventilation device, detects the degree of dirt in the air in the cabin of a vehicle, and generates a detection signal, and has an intake/exhaust fan, and that sensor an air purifier that operates in response to a detection signal of the sensor; and a blower drive motor for an air conditioning heating and cooling system; A device for a vehicle that includes an electric circuit for interlocking control to stop the operation of at least one of a blower drive motor of an air conditioning heating and cooling system and a drive motor of an intake/exhaust fan of the air purifier when the motor is in operation. (2) The vehicle air conditioner according to claim 1, wherein the ventilation device includes a motor-driven air suction fan, an electromagnetic-driven vibration fan, and an electromagnetic-driven vibration fan disposed near the detection signal generating section of the sensor. A vehicle air conditioner including any one of a plate and an electric wind generator. (3) The vehicle air conditioner according to claim 1, wherein the ventilation device A vehicle air conditioner including a motor-driven blower of the air conditioning heating and cooling device configured to perform a defrost mode breeze blowing operation during operation.