JPS62275821A - Ventilator for automobile - Google Patents

Abstract

PURPOSE:To perform the driving of a ventilating fan and the charging of a car-mounted battery in a proper manner as well as to aim at the effective utilization of a solar battery, by controlling an operating state of the ventilating fan in making it correspond to temperature condition in a car, in case of a ventilator making the solar battery a power source. CONSTITUTION:When a driver turns an ignition switch to OFF, a switch 21 comes to ON, and when the driver alights from a car, a seat switch 22 is turned on. Therefore, output of a solar battery 2 is made feedable to a motor 10a of a ventilating fan 10 and a car-mounted battery 24. And, operation of the ventilating fan 10 is classified into four types of patterns according to each state of battery voltage to be detected by a voltage sensor 29 and cab inside temperature to be detected by a temperature sensor 18. At this time, when voltage of the car-mounted battery 24 is low, the charging is prior to others, while when it is not low, the ventilating fan 10 is rotated at low speed or high speed according to the cab inside temperature.

Description

[Detailed Description of the Invention] 3. Detailed Description of the Invention [Field of Industrial Application] The present invention is an air conditioner for an automobile that uses a solar cell as a power source, and the solar cell can also be used to charge an on-board battery. The present invention relates to an automotive air conditioner that controls the operation of a ventilation fan according to the purpose.

[Conventional technology]

The present inventors previously proposed in Japanese Patent Publication No. 59-51451 an air conditioner for an automobile for reducing the temperature inside the automobile and removing the odor generated inside the automobile. Since this air conditioner is operated while the car is stopped, it uses a solar battery arranged on the top surface of the car's roof as a power source. In addition, this air conditioner is equipped with a temperature detector so that, for example, the ventilation fan is activated only when the temperature inside the vehicle exceeds the set temperature. It is designed to drive the

[Problem that the invention seeks to solve]

Thereafter, the inventors conducted further tests and research on the air conditioner, and as a result, the following facts were discovered. In other words, the amount of ventilation air required to reduce the temperature inside the car to the target temperature within a predetermined period of time, and the odor inside the car, such as the odor generated from resin parts inside the car, or the odor generated from the evaporator or ventilation duct of the car air conditioner. It was found that there is a large difference between the amount of ventilation air required to remove In other words, to reduce the temperature inside the car to the target temperature, it is necessary to rotate the ventilation fan at high speed to increase the ventilation air volume, but on the other hand, to remove odors from inside the car, it is sufficient to rotate the ventilation fan at low speed. This means that there is no need to operate the ventilation fan at high speed when the temperature inside the vehicle is not very high, and on the other hand, it poses the problem that constantly operating the ventilation fan at high speed is wasteful.

On the other hand, vehicle electrical components such as automobiles are generally subject to power supply constraints that require low power consumption.
Increased efficiency is required. It is desirable that the electrical energy left over from the solar cells is stored in an on-vehicle battery to make more effective use of it.

Therefore, the present invention aims to effectively utilize the electrical energy of the solar cells by controlling the operating state of the ventilation fan in accordance with the temperature situation inside the car in an air conditioner that uses the solar cells installed in the car as a power source. In particular, the object of the present invention is to provide an air conditioner for an automobile that simultaneously drives a ventilation fan for odor removal and charges an on-board battery, and stores excess electrical energy from solar cells in the on-board battery. be.

[Means to solve problems]

The present invention has been made to achieve the above object, and the first invention includes fa) a solar cell installed on a car body and converting sunlight irradiated onto the car body into electrical energy; and (b) A blower device connected in series with this solar cell and driven by the electric energy of this solar cell to ventilate the inside and outside of the vehicle; (c1 an onboard battery connected in series to this blower device; a temperature sensor to detect; ([4) a first switch means connected in parallel to the blower; (r) a second switch means connected in parallel to the vehicle battery; control means for controlling the opening and closing of the first and second switch means in accordance with the input detection signal; When the temperature is lower than the first set temperature (T1), the first switch means is closed and the second switch means is opened, so that the temperature inside the vehicle is higher than the first set temperature (T1). Both the first switch means and the second switch means are opened when the temperature is within the range between the second set temperature (T2), and when the temperature inside the vehicle is higher than the second set temperature, the first switch means A technical measure is adopted in which the second switch means is configured to open and close the second switch means.

In addition, in the second invention, jB) a solar cell installed on the car body and converting sunlight and collars irradiated onto the car body into electrical energy; and (b) connected in series with this solar cell, the electricity of this solar cell is (c) An on-vehicle bar connected in series to the air blower, which is driven by energy and ventilates the inside and outside of the vehicle.

(dl) a temperature sensor that detects the temperature inside the vehicle; (e) a charge amount detection sensor that detects the state of charge of the in-vehicle battery; (fl) a first switch means connected in parallel to the blower; A second switch means (El) connected in parallel to the vehicle battery; (1) The control means switches the first switch means when the temperature inside the vehicle detected by the temperature sensor is lower than a preset first temperature (T). When the temperature inside the vehicle is within a range between the first set temperature (T1) and a second set temperature (T2) set higher than the first set temperature (T1), the second switch means is closed and the second switch means is opened. Both the first switch means and the second switch means are opened, and when the temperature inside the vehicle is higher than the second set temperature, the first switch means is opened and the second switch means is closed; When the amount of charge of the in-vehicle battery detected by the charge amount detection sensor is below a set value, the first switch means is closed regardless of the temperature inside the vehicle, and the second switch means is closed regardless of the temperature inside the vehicle.
A technical measure is adopted in which the switch means are configured to open.

[Action and effect of the invention]

According to the technical means of the first invention, the control means compares the first set temperature (T1) and the second set temperature (T2) with the temperature inside the car, and operates the blower when the temperature inside the car is lower than T1. Since there is no need to charge the vehicle's battery, the solar battery only charges the vehicle battery, and when the temperature inside the vehicle is between T and T2, the solar battery rotates the blower at low speed for odor removal, and at the same time charges the vehicle's battery. In addition, when the temperature inside the vehicle is higher than T2, the air blower is rotated at high speed by the solar battery in order to lower the temperature inside the vehicle.

In this way, the first invention eliminates wasted electrical energy consumption by operating the ventilation blower as needed, and also charges the excess electrical energy from the solar cells to the vehicle battery to effectively utilize energy. can be achieved. Moreover, since the ventilation blower is not driven at a higher speed than necessary, excellent effects such as not impairing the life of the drive motor can be obtained.

In addition to obtaining the above-mentioned effects, the second invention also detects the amount of charge of the in-vehicle battery, and when the amount of charge falls below that amount, the operation of the ventilation blower is stopped regardless of the temperature inside the vehicle. However, the on-vehicle battery can be charged preferentially by the output of the solar cell.

Therefore, in the second aspect of the invention, the output of the solar cell provided as a power source for ventilation during parking also has the excellent effect of preventing over-discharge of the vehicle battery.

〔Example〕

The present invention will be described in detail below using the drawings.

1 to 7 show a first embodiment, and FIG. 1 schematically shows the arrangement of elements constituting an air conditioner according to the present invention in an automobile, and FIG. An enlarged view of the ventilation system inside.

2 indicates a car body, and 2 is a solar cell provided on the upper surface of the roof 3 of the car body 1. The solar cell 2 is in the form of a panel with a wide area and is composed of a plurality of battery cells.

The location where the solar cell 2 is disposed on the vehicle body is not limited to the roof 3, but can be arbitrarily selected as long as it can receive the light vA5 from the sun 4.

Reference numeral 6 denotes a ventilation system of an automobile air conditioner, in which a ventilation passage 9 is formed between an outside air intake lower and a vehicle interior air outlet 8. Inside the ventilation passage 9, there are ventilation fans 10 each driven by a motor.
An air conditioning blower 11 and an air conditioning heat exchanger such as an evaporator 12 are also provided. When the ventilation fan 10 operates, air is blown as shown by the arrow. This is shown in detail in Figure 2. In FIG. 2, a dedicated ventilation fan 10 is installed near the outside air intake lower, and an inside air intake 13 is also formed in the ventilation passage 9 to take in the air inside the vehicle. Therefore, on the upstream side of the air conditioning blower 11, a switching damper 14 is provided to select between outside air and inside air.

15 is a motor for rotationally driving the air conditioning blower 11. Furthermore, a heating heater core 17 equipped with an air mix damper 16 for temperature control is disposed between the evaporator 12 that cools the blown air using the latent heat of vaporization of the refrigerant in the refrigeration cycle and the air outlet 8 into the vehicle interior. . This heater core 17 heats the blown air using the automobile engine cooling water as a heat source.

Further, in FIG. 1, reference numeral 18 denotes a temperature sensor disposed inside the vehicle interior, which is composed of a temperature sensing element such as a thermistor.
It detects the temperature inside.

The temperature sensor 18 can be installed at any location within the vehicle, and a separate temperature sensor may be installed in the rear trunk 20 for odor elimination.

FIG. 3 is a circuit diagram showing the electrical configuration of the air conditioner according to the present invention, and FIG. 4 shows a specific circuit of the electric controller.

In FIG. 3, the solar cell 2 has its negative terminal grounded, and a switch 21 interlocked with the ignition switch is connected between its positive terminal and the ground.
For example, a series circuit consisting of a seat switch 22 that detects whether the driver gets on or off the vehicle, the ventilation fan 10, a diode 23 that prevents reverse energization, and an on-vehicle battery 24 is connected. In this circuit, a normally closed switch (first switch means) 25, which is in a normally closed state and can short-circuit both terminals of the motor 10a of the ventilation fan 10 when closed, is connected in parallel to the ventilation fan 0, In addition, there is a normally open switch between the anode terminal of the diode 23 and the ground, which can short-circuit when it is closed.
A second switch means) 26 is connected. 1st switch 2
5 is closed, no voltage is applied to the motor 10a of the ventilation fan 10, and the ventilation fan 10 does not operate. Also,
When the second switch 26 is closed, the voltage of the solar cell 2 is not applied to the battery 24, and the battery 24 is not charged. In addition, a resistor 2 is connected in parallel to the battery 24.
7 and a Zener diode 28, and a voltage sensor 29 are connected. Zener diode 2
8 is for preventing excessive voltage from being applied to the battery 24. Further, the voltage sensor 29 is for detecting the voltage state of the battery 24.
It outputs a signal corresponding to the voltage value between the terminals of , and functions as a battery charge amount detection sensor. Reference numeral 30 denotes an electric controller to which detection signals from the temperature sensor 18 and voltage sensor 29 described above are input, and a control signal obtained as a result of signal processing is supplied to the switches 25 and 26. switch 2
5.26 opening/closing operation is performed by voltage sensor 29 and temperature sensor 18
Based on the output signal, the electric controller 30 performs control as shown in the table shown in FIG. 5, which will be described later. switch 25
．． For 26, a relay contact, a semiconductor switch, a reed switch, etc. is used.

As shown in FIG. 4, the electric controller 30 is composed of, for example, three comparators 31, 32, 33 and L AND gates . The voltage 1 set by the resistors R, , R2 is input to the inverting input terminal of the first comparator 31, and the output signal of the voltage sensor 29 is input to the non-inverting input terminal thereof. This first comparator 31 outputs an H level output when the voltage of the battery 24 is 71 or higher. A voltage corresponding to the first set temperature T, which is set by resistors R3 and R4, is input to the inverting input terminal of the second comparator 32, and a voltage corresponding to the first set temperature T, which is set by resistors R3 and R5, is input to the inverting input terminal of the third comparator 33. A voltage corresponding to the second set temperature T2 is input. In this case, the reset temperature T.

T2 has a relationship of T<T2. On the other hand, the output signal of the temperature sensor 18 is input to each non-inverting input terminal of the second and third comparators 32 and 33.

The second comparator 3.2 outputs an H level output when the vehicle interior temperature T exceeds T, and the third comparator 3.
3 outputs an H level output when the vehicle interior temperature T becomes T2 or higher. Each output signal of the first and second comparators 31 and 32 is inputted to the AND gate 34, and the output is given to the switch 25, and when the output of the AND gate 34 becomes H level, the normally closed switch 25 is opened. do. Third
The output of the comparator 33 is directly applied to the switch 26, and the normally open switch 26 is closed when the output of the third comparator 33 becomes H level. The electric controller 30, voltage sensor 29, temperature sensor 18,
The signal transmission/reception relationship with the switches 25 and 26 is shown by broken lines in FIG.

Next, the operation of the apparatus of this embodiment having the above configuration will be explained with reference to FIGS. 5 to 7. Here, Fig. 5 is a table showing the operation modes divided into four patterns, 1 to 2, and Fig. 6 is a table showing the V-T of each of the solar cells and the ventilation fan.
(voltage-current) characteristics, and FIG. 7 shows the relationship between the vehicle interior temperature (T) and the rotation speed (N) of the ventilation fan when the intensity of the sun's rays is constant.

The air conditioner of this embodiment is ready to operate when the passenger gets out of the car. That is, when the driver turns off the ignition switch, the switch 21 turns on, and when the driver gets out of the car, the seat switch 22, which had been off until then, detects the presence of the driver and turns on. Become. By turning on this switch 21 and the sheet switch 22, the output of the solar cell 2 is turned on to the ventilation fan 1.
0 motor 10a and in-vehicle battery 24.

In the above circuit state, when the voltage (■) of the battery 24 is smaller than the set voltage (■), the output of the first comparator 31 is at the L level, so the normally closed switch 25 is closed regardless of the temperature inside the vehicle. On the other hand, the normally open switch 26 is kept open under the condition that the vehicle interior temperature is lower than Tt (pattern 1). Therefore, when the voltage ■ of the vehicle battery 24 is lower than the set value (V1), the ventilation fan IO is not driven, and charging of the battery 24 by the solar cell 2 is prioritized.

Next, when the voltage ■ of the battery 24 is higher than the set voltage ■1 and the temperature inside the vehicle is lower than T, the outputs of the first and second comparators 31 and 32 are at H level, respectively.
Since it is at L level, the output of AND gate 34 is kept at L level and switch 25 remains closed, while the output of comparator 33 is also at L level and switch 26 is kept open (pattern ■). Therefore, even if the voltage ■ of the battery 24 is higher than the set value 75, if the temperature inside the vehicle is not so high and is lower than T1, there is no need to operate the ventilation fan 10, so the ventilation fan 10 is not driven.
Only the battery 24 is charged.

Further, when the voltage ■ of the battery 24 is higher than ■3 and the vehicle interior temperature T is in the range of T<TNT2, the first
Since the outputs of the second comparators 31 and 32 both become H level, the output of the AND gate 34 becomes H level, the switch 25 is opened, and the switch 26 is also kept open (pattern 2). In this case,
For the purpose of eliminating odors in the vehicle interior, a ventilation fan 10 and a pantry 2 are connected in series with the output voltage of a solar cell 2.
4 is applied to the ventilation fan 10, and the ventilation fan 10 is driven at a small rotational speed N. At the same time, the battery 24 is also charged. As shown in FIG. 6, the solar cell 2 has the V-1 characteristic shown in A, whereas the motor 0a of the ventilation fan 10 connected in series with the battery 24 has the V-1 characteristic shown in B. have. Therefore, at the point determined as the intersection of characteristics A and B, ventilation fan 1
The zero operating point is determined. Note that as the battery 24 is charged, the voltage applied to the ventilation fan 10 becomes smaller.
The operating point will also shift from al to Zsa3. Further, when the sunlight becomes stronger and the output voltage of the solar cell 2 becomes higher, the voltage applied to the ventilation fan IO becomes larger and the rotation speed N1 becomes higher.

Next, when the voltage V of the battery 24 is equal to or higher than vI and the vehicle interior temperature is equal to or lower than T2, the comparator 3
All outputs of 1.32.33 become H level, switch 25 is opened and switch 26 is closed, so
Charging of the battery 24 is stopped, the full voltage of the solar cell 2 is applied to the ventilation fan IO, and the ventilation fan 10 rotates at a higher speed N2 (pattern ■). In this case, since the vehicle interior temperature has become higher than T2, battery 2
4 is stopped and the ventilation fan 10 is rotated at high speed to lower the temperature inside the vehicle.

In FIG. 6, C indicates the V-1 characteristic of the ventilation fan 10 when the battery 24 is short-circuited, and the operating point a4 of the ventilation fan 10 is the intersection of this characteristic C and the V-1 characteristic A of the solar cell 2. determined. This operating point a4 means the maximum output point.

As described above, the operation of the ventilation fan 10 is classified into patterns I to ■ depending on the state of the battery voltage ■ detected by the voltage sensor 29 and the vehicle interior temperature T detected by the temperature sensor 18. The ventilation fan 10 operates in any one of patterns I to ■ based on the control of the electric controller 30.

According to the above control, when the battery voltage is low, charging of the battery 24 is prioritized. When the battery voltage is not low, first 71 <'l'<T
2, the ventilation fan 10 removes odors at a low rotational speed N1. When T, <T, the ventilation fan 10 lowers the temperature inside the vehicle at a high rotation speed N2. This state is shown in FIG.

Note that FIG. 7 is drawn under the condition that the intensity of sunlight 5 is constant. However, in general, the output voltage of the solar cell 2 increases or decreases depending on the increase or decrease in its intensity, so the rotation speed N
11Nt changes automatically according to the amount of solar radiation without a special sensor.

FIG. 8 shows a second embodiment of the ventilation system according to the present invention, and is similar to FIG. 1, and the same elements in the figure are given the same reference numerals. In this second embodiment, a dedicated ventilation fan is not provided, and the air conditioning blower 11 also serves as a ventilation fan. Therefore, no special ventilation fan is required, and it is possible to improve wearability and reduce costs.

9 to 11 show a third embodiment of the present invention,
In this example, by providing two values V, V2, large and small, as set values for the detection value ■ of the voltage sensor 29, the battery This prevents overcharging of the battery. To explain concretely based on the diagram,
In this example, the electric controller 30 includes a fourth comparator in addition to the first to third comparators 31, 32, and 33 shown in FIG.
A comparator 35 is provided, and a voltage 2 set by resistors R7 and Ra is applied to the inverting input terminal of the fourth comparator 35, and the output of the fourth comparator 35 is
It is configured to be applied to the normally open switch 26 via the R gate 36.

According to such a configuration, the operation of the ventilation fan 10 and the charging current of the vehicle battery 24 are controlled according to the control patterns 1 to 3 shown in FIG. 11. The control patterns I to ■ are basically the same as the control patterns I to ■ in FIG. voltage is second
When the voltage rises to the set value 72 or more, the H level output of the fourth comparator 35 closes the normally open switch 26 via the OR game 136, stops charging the vehicle battery 24, and prevents overcharging of the vehicle battery 24. prevent.

FIG. 12 shows a fourth embodiment, in which the voltage sensor 2 described above is used as a sensor for detecting the amount of charge of the battery 24.
9 is replaced by a specific gravity sensor 290 that detects the specific gravity of the electrolyte in the Pafteri (lead-acid battery) 24.
A detection signal of 0 is input to the electric controller 30.

This specific gravity sensor 290 has a bar 7 as shown in FIG.
By utilizing the fact that the terminal voltage of the battery 24 and the specific gravity of the electrolyte tend to decrease with the passage of discharge time, the battery 2
4, and this specific gravity sensor is known from Japanese Unexamined Patent Publication No. 54-332 (Japanese Patent Publication No. 59-39328), which was previously proposed by the present inventors. The explanation of is omitted. Although the above-mentioned publication shows a switch type specific gravity sensor, it is obvious to those skilled in the art that a specific gravity sensor that changes the electrical resistance value continuously or stepwise can be constructed.

Note that in the illustrated embodiment described above, the switch 25.2
Although the operation control of No. 6 was performed by an electric controller 30 having a hardware configuration consisting of a combination of individual circuit elements, it can also be realized by software using a microcomputer. Further, the switches 25 and 26 are not limited to normally closed switches or normally open switches, but any switch means may be used as long as the above-mentioned opening/closing operations can be performed by control signals from a control means such as an electric controller. be able to.

As described above, the present invention can be implemented in a wide variety of ways.

[Brief explanation of the drawing]

FIG. 1 shows a first embodiment of the present invention, and is a schematic diagram showing the arrangement of the components of an air conditioner, FIG. 2 is an enlarged view of the ventilation system shown in FIG. 1, and FIG. Figure 1 is an electric circuit diagram of the air conditioner shown in the drawings, Figure 4 is a specific circuit diagram of the electric controller shown in Figure 3, Figure 5 is an embodiment diagram showing the control pattern of the first embodiment, and Figure 6 is a solar cell diagram. FIG. 7 is an explanatory diagram showing the relationship between the vehicle interior temperature and the rotation speed of the ventilation fan, FIG. 8 is a schematic diagram similar to FIG. 1 regarding the second embodiment, and FIG. The figure is an electrical circuit diagram showing the third embodiment;
The figures are a specific circuit diagram of the electric controller shown in FIG. 9, FIG. 11 is a mode diagram showing the control pattern of the third embodiment, and FIG.
FIG. 2 is an electric circuit diagram showing the fourth embodiment, and FIG. 13 is a discharge characteristic diagram of a lead-acid battery used as a battery. 1...Car body, 2...Solar cell, 5...Sunrays, ventilation fan (ventilation blower), 1
1... Air conditioning blower, 12... Evaporator, 18
...7 crystallinity sensor, 23...diode, 24...
- Vehicle battery, 25... first switch, 26...
- Second switch, 29... Voltage sensor (charge amount detection sensor), 30... Electric controller (control means),
290... Specific gravity sensor (charge amount detection sensor).

Claims (9)

[Claims] (1) (a) A solar cell that is installed on the car body and converts sunlight irradiating the car body into electrical energy; (b) A solar cell that is connected in series with this solar cell and is driven by the electrical energy of this solar cell. (c) an on-vehicle battery connected in series to the air blower; (d) a temperature sensor that detects the temperature inside the car; (e) an air blower connected in parallel to the air blower. (f) a second switch means connected in parallel to the in-vehicle battery; (g) a detection signal from the temperature sensor is input, and the first and second switches are connected in accordance with the detection signal; (h) This control means controls the first switch means when the temperature inside the vehicle detected by the temperature sensor is lower than a first set temperature (T_1) set in advance. is closed, and the second switch means is opened, and the temperature inside the vehicle is within a range between the first set temperature (T_1) and a second set temperature (T_2) set higher than the first set temperature (T_1). At times, both the first switch means and the second switch means are opened, and when the temperature inside the vehicle is higher than the second set temperature, the first switch means is opened and the second switch means is closed. Automotive ventilation system consisting of: (2) The ventilation system for an automobile according to claim 1, wherein the air blower is constituted by a fan dedicated to ventilation, which is provided in the ventilation system of the automotive air conditioner independently of an air conditioning blower. (3) The ventilation system for a vehicle according to claim 1, wherein the air conditioning blower itself provided in the ventilation system of the vehicle air conditioner also serves as the ventilation system. (4) (a) A solar cell that is installed on the car body and converts sunlight irradiating the car body into electrical energy; (b) A solar cell that is connected in series with this solar cell and is driven by the electrical energy of this solar cell. (c) a vehicle battery connected in series to the ventilation device; (d) a temperature sensor that detects the temperature inside the vehicle; (e) detects the state of charge of the vehicle battery. (f) a first switch means connected in parallel to the blower; (g) a second switch means connected in parallel to the vehicle battery; (h) the temperature sensor and the charger; a control means to which a detection signal of the quantity detection sensor is input and controls opening and closing of the first and second switch means according to both detection signals; When the vehicle interior temperature is lower than the first preset temperature (T_1), the first switch means is closed and the second switch means is opened, and the vehicle interior temperature is lower than the first preset temperature (T_1). ) and a second set temperature (T_2) set at a higher temperature, both the first switch means and the second switch means are opened, and the temperature inside the vehicle reaches the second set temperature. When the amount of charge of the in-vehicle battery detected by the amount of charge detection sensor is below the set value, the first switch means is opened and the second switch means is closed. the first switch means is closed, and the second switch means is closed.
A motor vehicle ventilation system configured to open a switch means. (5) The control means has a first set value (V_1) and a second set value (V_2) larger than the first set value (V_1) as set values for the charge amount of the vehicle-mounted battery, and is smaller than the first set value (V_1), the first switch means is closed and the second switch means is opened regardless of the temperature inside the vehicle, while the amount of charge of the vehicle battery is equal to the second set value. 5. The ventilation system for a motor vehicle according to claim 4, wherein the second switch means is configured to close regardless of the interior temperature of the vehicle when the temperature is higher than that of the vehicle interior. (6) The automobile according to claim 4 or 5, wherein the blower is constituted by a fan dedicated to ventilation that is provided in the ventilation system of an automobile air conditioner independently of an air conditioning blower. ventilation system. (7) The automotive ventilation system according to claim 4 or 5, wherein the air conditioning blower itself provided in the ventilation system of the automotive air conditioner also serves as the ventilation system. (8) The automobile ventilation system according to any one of claims 4 to 7, wherein the charge amount detection sensor is a voltage sensor that detects a voltage between terminals of a vehicle-mounted battery. (9) Claim 4, wherein the charge amount detection sensor is a specific gravity sensor that detects the specific gravity of the electrolyte of the in-vehicle battery.
The automotive ventilation system according to any one of items 7 to 7.