JPS5915688Y2 - auto ventilation system - Google Patents

Description

[Detailed description of the invention] The invention relates to an automatic ventilation system for automobiles, and in particular, when the outside air introduction passage is opened, the exhaust system installed at the rear of the passenger compartment
The present invention relates to a ventilation system that is operated in a synchronized manner to increase ventilation efficiency.

Conventional ventilation in automobiles was developed, for example, in
As disclosed in Publication No. 069 (3. Outside air is introduced into the passenger compartment from the outside air inlet at the front of the vehicle body by the wind pressure during driving or the action of the fan of the air conditioner, This is done by exhausting the dirty air through ventilation holes installed at the rear of the car body or through gaps between various parts of the car body.

However, in such a ventilation system, since the ventilation parts are dispersed, a sufficient airflow is not formed in the vehicle interior, and cigarette smoke and dust are diffused into the vehicle interior.

On the other hand, in order to improve this drawback, a forced ventilation fan is installed in the above-mentioned ventilation opening, which forms an airflow inside the vehicle interior and exhausts the air from the vehicle interior in a concentrated manner in one place. A number of forced ventilation systems have been proposed.

However, such forced ventilation devices are equipped with an independent operation switch to operate the device, which is troublesome as the switch must be operated each time to perform forced ventilation. Forced ventilation is operated unnecessarily even when the introduction passage is closed, resulting in overload of the fan motor and impairing its durability.

In addition, forced ventilation efficiency under such conditions is extremely poor.

The present invention has been developed in view of such conventional problems, and therefore, the purpose of the present invention is to make the fan motor of a forced ventilation system related to the opening/closing operation of the outside air introduction passage, and at the same time to make it related to the vehicle speed. To provide a new automatic ventilation system for an automobile, which allows easy forced ventilation operation and avoids unnecessary operation with poor ventilation efficiency.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic side view of an automobile 1 equipped with an automatic ventilation system of the present invention, with a portion thereof shown in transparent view.

In the figure, 2 is an outside air intake port provided at the front of the windshield 3, that is, at the front of the vehicle body, and a passage connected to this is used to introduce outside air into the vehicle interior or to recirculate the interior air. An intake selection door 4 is provided which can be opened and closed.

Reference numeral 5 denotes an air conditioner, which is provided with an intake fan (not shown), which forcibly sends outside air or cabin air into the cabin or forces it back into the cabin.

On the other hand, an exhaust device 6 is provided at the rear of the vehicle interior.

This exhaust device 6 is as shown in FIG.

That is, 7 is a duct through which the air inside the vehicle passes, and is provided inside a ventilation opening 9 opened in the shape of a window in the rear fender 8. A bracket 11 to which a fan motor 10 is attached is attached inside this duct 7. There is.

A fan 12 is attached to this fan motor 10,
When this rotates, it acts to exhaust the air inside the vehicle interior from the ventilation port 9 to the outside of the vehicle interior.

Reference numeral 13 denotes a one-way flap valve, which is attached to cover one side of the bracket 11, and when the air in the vehicle interior is exhausted, it opens depending on the wind pressure and allows the air to be discharged, It acts to prevent outside air from entering the vehicle interior.

FIG. 4 shows the basic type of the drive circuit for the fan motor 10. As shown in FIG.

In the figure, 14 is a battery power supply, 15 is an ignition switch, 16 is a drive switch for the fan motor 10, and 17 is a speed changeover switch for the fan motor 10.
These are connected in series to the fan motor 10.

Reference numeral 18 denotes a series resistor, which can be arbitrarily connected to the fan motor 10 by switching the switch 17, so that the speed of the fan motor 10 can be selected.

Further, the drive switch 16 of the fan motor 10 is
It is linked to an inside/outside air switching lever 20 whose tip is visible on an air conditioning operation panel 19 as shown in FIG.

This switching lever 20 is used to open and close the above-mentioned intake selection door 4, and when it is switched to the ventilator side, that is, the outside air introduction mode, the switch 16 is closed.

Note that 21 is a cooling return operation switch, 22 is a fan switch that adjusts the air volume by the fan on the ventilator side, 23 is a lever that selects the air outlet, and 24 is a temperature adjustment lever.

Next, the operation of the automatic ventilation system having such a configuration will be described.

First, when ventilating the vehicle interior with the ignition switch 15 closed, press the inside/outside air switching lever 2.
0 to the ventilator side to switch the intake selection door 4 to outside air introduction mode.

As a result, outside air is introduced into the vehicle interior by wind pressure or fan operation when the vehicle is running.

On the other hand, by operating the inside/outside air switching lever 20, the driving switch 16 of the fan motor 10 shown in FIG. 4 is simultaneously closed, and current flows from the power source 14 to the fan motor 10 to drive it.

As the fan 12 rotates, the air inside the vehicle is discharged to the outside of the vehicle through the ventilation port 9.

In this way, the ventilation operation can be arbitrarily and automatically performed only by operating the inside/outside air switching lever 20.

Incidentally, selection of the displacement amount by the fan 12 is performed using the switch 17.
This can be done arbitrarily by switching.

On the other hand, the inside/outside air switching lever 20 is set to inside air circulation (RFC).
When set to the mode, the switch 16 is also opened at the same time, so that the drive of the fan motor 10 is automatically stopped.

By the way, in such an automatic ventilation system, even if the speed of the automobile increases sufficiently and sufficient ventilation is performed by natural ventilation, the fan motor 10 is driven needlessly and the electric power is consumed. This causes wasteful consumption and shortens the life of the fan motor 10.

Therefore, as shown in FIG. 5, a switch 26 is connected to the circuit for driving the fan motor 10, which opens when the needle of the speedometer 25 indicates a speed higher than a predetermined value.

This way, when natural ventilation is sufficient, the fan motor Q
You can stop unnecessary driving.

In this case, the switch 25 depending on the speed detection
The control is determined according to the characteristic diagram shown in FIG.

This figure shows the ventilation amount with respect to the vehicle speed, and the natural ventilation amount Gr is linearly proportional.

When the car runs, the air pressure at the air intake port 2 increases and the pressure at the ventilation port 9 decreases, so that outside air is efficiently introduced into and exhausted from the vehicle interior, and the natural exhaust amount is proportional to the vehicle speed.

Further, Gf indicates the amount of forced ventilation caused by forced exhaust due to the operation of the fan motor 10.

This allows ventilation even when the vehicle is stopped.

The ventilation level caused by the fan motor 10 is set to be higher than the target ventilation volume Gt, but as the vehicle speed increases, the pressure in the two air intake ports increases, the pressure in the ventilation part decreases, and the exhaust volume gradually increases. .

However, when the vehicle speed exceeds the predetermined value Vo, the ventilation efficiency does not improve significantly compared to when the vehicle speed is low.

Therefore, if the ventilation is switched from forced ventilation to natural ventilation at the speed ①0, inefficient operation of the fan motor can be prevented.

That is, when the switch 26 is opened at this speed Vo, the fan motor 10 is stopped and the ventilation can be automatically switched to natural ventilation.

Further, FIG. 7 shows a switch 26 connected in series with the resistor 18, which is opened and closed according to the speedometer 25.

According to this, by switching the switch 17, the fan motor 1
When driving the 0 at low speed, forced ventilation and natural ventilation are automatically performed according to the vehicle speed, and switch 1 is turned on.
7 to the high-speed operation side of the fan motor 10, rapid ventilation can be performed regardless of the vehicle speed.

As explained above, according to the present invention, a ventilation system for an automobile is configured to drive a fan motor attached near the ventilation opening of the automobile to exhaust the air inside the cabin to the outside of the vehicle through the ventilation opening. The above-mentioned fan motor drive switch is connected to the inside/outside air switching lever so as to be closed when outside air is taken in, and a switch that opens and closes depending on the vehicle speed is inserted in the fan drive circuit. Forced ventilation can be performed easily and efficiently, and the fan motor can be prevented from being driven pointlessly with the outside air inlet port closed, so that the durability of the fan motor is not impaired.

In addition, at low speeds, the fan motor is driven to ensure ventilation, and at the same time, at medium and high speeds 6, unnecessary drive of the fan motor is stopped in areas where there is sufficient natural ventilation. Durability can be improved.

Moreover, the structure for obtaining such effects is extremely simple and inexpensive, and is highly practical.

Further, by adjusting the speed changeover switch 17 of the fan motor 10, the displacement and efficiency can be arbitrarily selected.

[Brief explanation of drawings]

Fig. 1 is a partially transparent side view of an automobile equipped with an automatic ventilation system according to the present invention, and Fig. 2 is a view taken along line A-A in Fig. 1, also showing the structure near the ventilation opening. Cross section, 3rd
The figure is a front view of the air conditioning control panel, Figure 4 is a circuit diagram of the automatic ventilation system, Figure 5 is a circuit diagram showing another embodiment of the automatic ventilation system, and Figure 6 is a diagram of natural ventilation and forced ventilation depending on vehicle speed. FIG. 7 is a circuit diagram showing another embodiment of the automatic ventilation system.

Claims (1)

[Scope of utility model registration request] Drives a fan motor installed near the car's ventilation opening,
In the case where the air inside the vehicle is discharged to the outside of the vehicle through the ventilation opening, the drive switch for the fan motor is connected to the inside/outside air switching lever so as to be closed when outside air is introduced, and the fan is driven. An automatic ventilation system for automobiles characterized by inserting a switch in the circuit that opens and closes depending on the vehicle speed.