JPS6015485B2 - automotive ventilation system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a ventilation system for an automobile for preventing the inside of a vehicle interior or trunk of an automobile parked for a long time under the scorching sun from being exposed to high temperatures.

However, when a car is parked outdoors in the hot summer sun for a long time, the interior of the car and the trunk can reach high temperatures of over 60 qo in some cases due to the broad rays of the sun's rays.
In the passenger compartment, this has the disadvantage that it causes great discomfort to the occupants when boarding the vehicle, and that it also slows down the cooling effect of the air conditioner. Another disadvantage is that the resin products and painted surfaces inside the vehicle become hot and emit a bad odor. Furthermore, in the case of a trunk room, there are disadvantages such as if the items placed inside the storage room are living things such as food or drinks, they may change in quality or rot under high temperature conditions.

For this reason, it has been proposed to prevent the temperature inside the car from rising by installing a blower powered by the on-board storage battery to exchange air inside and outside the car while the car is parked. With this configuration, when the vehicle is parked for a long time (for example, over many days), the storage battery may become over-discharged, making it difficult to restart the engine. Therefore, as a countermeasure to this problem, it has been proposed to operate a time switch in series between the storage battery and the blower to automatically stop the operation of the blower after a certain period of time determined by the time switch. Adjusting the blower drive time means that the blower will be driven regardless of the state of charge of the storage battery, which has the disadvantage that over-discharging of the storage battery cannot be reliably avoided, and the time switch also allows you to set the restart time of the blower in advance. This has the disadvantage that if you board the train when the time switch is not activated, you may feel uncomfortable due to the high temperature inside the vehicle. The present invention has been made in view of the above points, and an object of the present invention is to provide a ventilation system for an automobile that can eliminate discomfort when re-boarding the vehicle without causing the inability to restart the engine due to the main storage battery.

In a first aspect of the present invention, in order to achieve the above object, in an automobile ventilation system, air inside the vehicle and outside the vehicle are exchanged with an auxiliary storage battery that is charged together with the main storage battery by a charging generator when the engine is operating. a ventilation means, a temperature detection means for detecting the temperature inside the car, a parking detection means for detecting the parking state of the car, and a temperature detection means controlled by the temperature detection means and the parking detection means, when the car is in the parked state and inside the car. and a control means for supplying power from the auxiliary storage battery to the air blowing means to operate the air blowing means when the temperature of the air blowing means is equal to or higher than a predetermined temperature.

To explain the effect of the above technical means, when the temperature inside the car rises to a predetermined temperature while the car is parked, the ventilation blowing means can be automatically activated using the auxiliary storage battery as a power source, thereby increasing the ventilation inside the car. It can be carried out.

Therefore, the temperature inside the vehicle can be maintained at a relatively low temperature by providing ventilation during parking without discharging the main storage battery.
In the second aspect of the present invention, in order to achieve the above-mentioned object, in an automobile ventilation system, an auxiliary storage battery that is charged together with the main storage battery by a charging generator when the engine is operated, and air exchange between the inside and outside of the car. temperature detection means for detecting the temperature inside the vehicle; parking detection means for detecting the parking state of the vehicle; charge amount detection means for detecting the charge amount of the auxiliary storage battery; is controlled by a detection means and the stored power amount detection means, when the vehicle is in a parked state and the temperature inside the vehicle and the amount of charge of the auxiliary storage battery are both equal to or higher than a predetermined value;
A technical means is adopted that includes a control means for supplying power from the auxiliary storage battery to the blowing means to operate the blowing means.

According to the above-mentioned technical means, in addition to exhibiting the same effect as the first invention, in the event that the charge amount of the auxiliary storage battery drops to a predetermined value, the function of the charge amount detection means allows the auxiliary storage battery to be transferred to the blowing means. Cut off the power supply to prevent over-discharging of the auxiliary storage battery.

The present invention will be described below with reference to embodiments shown in the drawings.

Figures 1 to 4 show one embodiment of the present invention.
In the figure, 1 is a passenger compartment of an automobile, and 2 is a floor of this passenger compartment 1. 3 is a rear seat installed on the floor 2, 4 is the roof of the passenger compartment 1, 5 is a side window of the passenger compartment 1, and 6 is a rear window. 7 is a trunk room formed behind the rear seat 3, 8 is a trunk lid that opens and closes this trunk room 7, 9 is a fuel tank installed in the trunk room 7, and 10 is a parking ventilation provided at the bottom of the rear window 6. passage, 11 is this passage 1
This is a ventilation fan installed inside the room, and is driven by a small-capacity micromotor 12.

This micromotor 2 is fixed to the inner wall of the passage 10 by a mounting stay (not shown). One end of the ventilation passage 10 is a vehicle interior air intake port 13 that opens into the vehicle interior 1.
The other end constitutes a discharge port 14 that opens outside the vehicle interior. Reference numeral 15 denotes a bimetal switch which serves as a temperature detection means for detecting the temperature inside the vehicle, and is installed at the upper side of the rear part of the vehicle interior 1. This bimetal switch 15 closes when the temperature inside the vehicle rises to a predetermined temperature, for example, 40 oo or higher. When the temperature is below a predetermined temperature, it becomes open.

FIG. 2 shows a concrete structure of the bimetal switch 15 described above, and the bimetal switch 15 is housed in a case 16 having a large number of ventilation holes 16a. The bimetal switch 15 includes a bimetal piece 15a fixed to the mounting base 17 with screws, a movable contact 15b provided at the tip thereof, and a fixed contact 15c placed opposite the movable contact 15b. In FIG. 2, 18 is the main storage battery of the automobile, which serves as a power source for the electric load of the automobile, and is charged by an engine-driven charging generator 19 when the automobile engine is operating.

It is a manually operated switch located near the driver's seat.

21 is a parking state detection means, which is a normally closed contact 21.
a, consists of a normally open contact 21b and a coil 21c.

This coil 21c is energized from the automobile main storage battery 18 via the ignition switch 22 of the automobile engine, and when the ignition switch 22 is opened and the automobile engine is stopped, the electricity supply to the coil 21c is cut off. Then, the normally closed contact 21a returns from the open state to the open state, and the normally open contact 21b returns to the open state. Reference numeral 23 denotes an auxiliary storage battery exclusively for ventilation, which is provided to drive the ventilation fan 11 when the vehicle is parked, and is charged together with the referee battery 18 by the generator 19 when the engine is operating.

Reference numeral 24 denotes a charge amount detection device for this auxiliary storage battery 23, and an example of its specific configuration is as shown in FIG.

The detection device 24 shown in FIG. 3 attempts to detect the state of charge of the storage battery 23 by utilizing the fact that the terminal voltage of the auxiliary storage battery (lead storage battery) 23 decreases as the discharge time of the storage battery 23 passes, as shown in FIG. In FIG. 3, 25 is a voltage detection circuit, 26 and 27 are resistors for dividing the terminal voltage of the storage battery 23, and 28 is a non-inverting amplifier that amplifies the voltage at the connection point A between these two resistors 26 and 27. , 29 are comparators that compare the set voltage determined by the two resistors 30 and 31 and the Zener diode 32 with the output voltage of the non-inverting amplifier 28. 33 is a base resistor, 34 is a switching transistor, and 35 is a relay, which is composed of a normally open contact 35a and an IJ relay coil 35b.

The normally open contact 35a is inserted into the circuit between the bimetal switch 15 and the motor 12, as shown in FIG. In this embodiment, the ventilation fan motor 1 is connected to the auxiliary storage battery 23.
As shown in FIG. Although it is configured by the circuit connection itself in which the open contact 35a is connected in series, it is obvious to those skilled in the art that this control means can be modified in various ways based on well-known circuit design techniques.

Next, the operation of the apparatus of the present invention with the above configuration will be explained.

In FIG. 2, when the car is parked, the ignition switch 22 is open, so the normally closed contact 21a of the relay 21 is open, and if the charge amount of the auxiliary storage battery 23 is normal, the charge amount The normally open contact 35a of the detection device 24 is closed. Further, the hand switch 20' is normally closed. Therefore, when the interior temperature of the vehicle rises above a predetermined temperature due to outdoor parking under the hot summer sun and the bimetal switch 15 closes, the auxiliary storage battery 23 is transferred to the manual switch 20, the normally closed contact 21a, and the bimetal switch 1.
5. Electricity is supplied to the motor 12 via the charge amount detection device 24, and the ventilation fan 11 is operated. As a result, the air inside the vehicle compartment 1 passes through the passage 10 and is discharged from the exhaust port 14 to the outside of the vehicle, and at the same time, the relatively low-temperature outside air from outside the vehicle enters the outside air intake (not shown) of the instrument panel or the side. It is introduced into the vehicle interior 1 through the gap between the windows 5 and the like. As a result, the interior of the vehicle interior 1 is ventilated, and the interior of the vehicle interior 1 can be prevented from becoming as hot as a greenhouse. In addition, the auxiliary storage battery 2 may be used for a long time while the car is parked.
3 to the motor 12, there is a concern that the auxiliary storage battery 23 may be over-discharged. However, in the present invention, if the terminal voltage of the auxiliary storage battery 23 drops below the specified voltage, for example 12.3V in FIG. As a result, the voltage at point A also decreases and the comparator 29
Since the output of the transistor 34 becomes a "0" level and the transistor 34 is cut off, the current to the relay coil 35b is cut off, and the normally open contact 35a returns from the closed state to the open state.

As a result, power supply to the motor 12 of the ventilation fan 11 is cut off, and over-discharge of the auxiliary storage battery 23 is completely prevented. In spring, autumn, and winter, the temperature inside the vehicle does not rise to a predetermined temperature even when the vehicle is parked outdoors, and the bimetal switch 15 is in an open state, so power is not supplied to the motor 12, thereby preventing unnecessary operation of the motor 12.

On the other hand, when the engine is running, the ignition switch 2
2 is opened and the relay coil 21c is energized, so
The normally closed contact 21a of the relay 21 opens and the normally open contact 21b closes.

As a result, the main referee battery 18 is charged by the generator 19, and at the same time, the auxiliary storage battery 23 is also charged through the normally open contact 21b. The present invention is not limited to the above-mentioned embodiments, but can be implemented in a wide range of modifications, and the modifications are enumerated as follows.

'11 The vehicle interior 1 and the trunk room 7 may be moved to ventilate the vehicle interior 1 and the trunk room 7 at the same time.

In this case, a fan 11 for ventilation may be provided in the trunk compartment 7. Also, bimetal switch 1
5 may also be provided in the trunk room 7. (2) As the temperature detection means, temperature switches other than the bimetal switch 15 and semiconductor temperature sensing elements can of course be used.

{31 The battery charge amount detection device 24 may be constituted by a device for detecting a change in the specific gravity of the battery electrolyte as shown in FIG. [41 The means for detecting the parking state of the automobile is the relay 21 which is linked to the ignition switch 22.
In addition, if it is a device related to the operation of the engine 4, such as an engine oil pressure switch or an engine tachometer. It may be linked to any device.

As explained in detail above, according to the first aspect of the present invention,
When parking under the hot summer sun, etc., inside the vehicle's cabin 1,
The inside of the trunk room 7 can be effectively ventilated and kept at a relatively low temperature, thereby preventing the deterioration of living things stored in the passenger compartment 1 and the trunk room 7.
It has excellent effects in that it can prevent rotting, and also eliminate discomfort caused by hot air when passengers board the vehicle after parking, slow start-up of the cooling effect of the air conditioner, and generation of bad odors.

Moreover, since the first invention is equipped with a dedicated auxiliary storage battery 23 as a power source for the ventilation fan 11, separately from the main storage battery 18 that acts as a power source for the electric load of the automobile such as a starter for starting the engine. Even if the auxiliary storage battery 23 should be over-discharged due to the ventilation operation, there is no problem in restarting the automobile engine.

Furthermore, in the second invention, in addition to the configuration of the first invention, a charge amount detection device 24 that operates the ventilation fan 11 only when the charge amount of the auxiliary storage battery 23 is equal to or higher than a predetermined value is provided. This has the effect of reliably preventing over-released fins.

[Brief explanation of drawings]

FIG. 1 is a collar-style sectional view of the rear part of an automobile showing an embodiment of the present invention, FIG. 2 is an electric circuit diagram of the present invention, and FIG. 3 is an electric circuit diagram of a charge amount detection device used in the present invention. FIG. 4 is a discharge characteristic diagram of the auxiliary storage battery in the present invention. 11, 12... Ventilation fan and motor serving as air blowing means, 15... Bimetal switch serving as temperature detection means, 18... Main storage battery, 19...
...Charging generator, 23...Auxiliary storage battery, 24
...Charge amount detection device. Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Scope of Claims] 1. An auxiliary storage battery that is charged together with the main storage battery by a charging generator when the engine is operating, a blower means that exchanges air between the inside and outside of the car, and a temperature detection means that detects the temperature inside the car. , a parking detecting means for detecting the parking state of the automobile, the temperature detecting means and the parking detecting means, and when the automobile is in the parked state and the temperature inside the vehicle is equal to or higher than a predetermined temperature; A ventilation system for an automobile, comprising: a control means for supplying power from an auxiliary storage battery to the blowing means to operate the blowing means. 2. An auxiliary storage battery that is charged together with the main storage battery by a charging generator when the engine is operating, a blower means that exchanges air inside and outside the vehicle, a temperature detection means that detects the temperature inside the vehicle, and a temperature detection means that detects the parking state of the vehicle. The vehicle is controlled by a parking detecting means for detecting, a charging amount detecting means for detecting the charging amount of the auxiliary storage battery, the temperature detecting means, the parking detecting means, and the stored electricity amount detecting means. hand,
and control means for supplying power from the auxiliary storage battery to the air blowing means to operate the air blowing means when the temperature inside the vehicle and the amount of charge of the auxiliary storage battery are both above predetermined values. ventilation system.