JPS6215365B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention is an automotive ventilation system for preventing the interior of a vehicle parked under the scorching sun from being exposed to high temperatures.

[Conventional technology]

Conventionally, when a car is parked outdoors in the hot summer sun for a long time, the inside of the car and the trunk can reach high temperatures of over 60 degrees Celsius due to radiation from the sun. This has the drawback of causing great discomfort and slowing 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.

In addition, if the electric fan motor of a normal ventilation system is operated by the car battery when parking, there is a drawback that if the car is parked for a long time, the car battery will over discharge and the engine will not be able to start. .

[Purpose of the invention]

The present invention has been made in view of the above points, and is equipped with a ventilation blower for exchanging air inside and outside the car in an automobile, and is configured to drive this blower with the electric energy of a solar cell obtained from sunlight. The purpose of the present invention is to provide a ventilation system for an automobile that can ventilate the inside of the car and maintain the temperature inside the car at a relatively low temperature close to the outside temperature without using the on-board battery when the car is parked in the hot summer sun. shall be.

Another object of the present invention is that when the temperature inside the car is low and there is no need to ventilate the inside of the car, by charging the car battery with the electrical energy of the solar cell, the car battery will not over-discharge due to natural discharge. The goal is to prevent this from happening.

[Example] The present invention will be described below with reference to the drawings. In FIGS. 1 and 2, the automobile 1 is
A door 2 and a rear window 3 are attached to the vehicle body. The rear window 3 is provided with a window frame 5 or a rainwater frame. Three sun visors 6 are attached to this window frame 5 or rainwater frame. This sun visor 6 can be easily attached using a fastener 7, and a solar cell 8 is installed in the center.

The automobile 1 is further provided with a ventilation system 10 for ventilating the interior of the vehicle compartment 1a. This ventilation system 10 is provided at the rear side of the vehicle 1, is equipped with an exhaust port 11 for discharging the air inside the vehicle compartment 1a to the outside of the vehicle, and is powered by a solar cell 8. Electric motor 12 with low power
and a ventilation fan 13 which is driven by the electric motor 12 and discharges the air inside the vehicle to the outside of the vehicle.

Next, the specific structure of the solar cell mounting portion in the present invention will be explained with reference to FIG. The sun visor 6 is constructed by pressing a metal plate such as stainless steel or iron plate, and a rectangular recess 6a is formed in the center of the sun visor 6, and a solar cell 8 is housed in the recess 6a. has been done.

Each solar cell 8 is fixed to a printed circuit board 14 made of Bakelite, glass epoxy, etc., and connected in series or in parallel. The printed circuit board 14 is installed in the recess 6a via an electrically insulating vinyl sheet 15, and the front side of the solar cells is covered with a transparent acrylic resin via a spacer 16 so as not to come into contact with each solar cell 8. A plate 17 is provided for protection. Note that the printed circuit board 14, the spacer 16, and the acrylic resin plate 17 are each fixed with an adhesive, and then fixed to the sun visor 6 with an adhesive to be fixed.

The solar cell 8 is connected to an electric circuit of the vehicle, which will be described later, via a lead wire 18, and the sun visor 6 is attached to the window frame 5 with two fasteners 7.

Next, the electric circuit of the present invention will be explained with reference to FIG. 4. 19 is a manual switch installed near the driver's seat of a car, 20 is an ignition switch of the car engine, and 21 is linked to this ignition switch 20. This relay consists of a normally closed contact 21a and a coil 21b. The ignition switch 20 and relay 21 constitute parking detection means for detecting the parking state of the automobile. Reference numeral 22 denotes a bimetal switch constituting temperature detection means and electric circuit switching means, which is installed, for example, in the vehicle interior 1a, and closes to the contact 22a side when the vehicle interior temperature is below a predetermined temperature, and closes the contact when the temperature is above a predetermined temperature. The switch is switched to the 22b side and closed. 23 is a diode for preventing backflow, and 24 is an on-board battery, which supplies power to various on-board devices.

Next, to explain the operation in the above configuration, when the temperature inside the vehicle cabin 1a is lower than a predetermined temperature, for example, 40° C. in winter, etc., the bimetal switch 22 is closed to the contact 22a side, and the vehicle When the vehicle is parked, the ignition switch 20 is off and the normally closed contact 21a of the relay 21 is closed. Therefore, if the manual switch 19 is closed, the current generated by the electrical energy of the solar cell 8 flows through the diode 23 to the vehicle battery 24 and charges the vehicle battery 24 while the vehicle is parked outdoors.
At this time, if a solar cell 8 with an effective output of about 3 watts is used, and the effective sunshine hours per day are 8 hours,
3watt×8hr=24Watt・hr, terminal voltage is 12V
When charging the in-vehicle battery 24, 24watt
hr÷12V=2A・hr. Therefore, if it is parked outdoors for a week, 7×2A・hr=14A・hr
This means that a sufficient amount of charge can be obtained, considering that the battery capacity of a typical car is approximately 40A/hr.

On the other hand, when the automobile 1 is parked under the hot sun such as in summer, the temperature inside the vehicle increases to a predetermined temperature or higher, and the bimetal switch 22 closes to the contact 22b side.
Therefore, electric power is supplied to the electric motor 12 by the electromotive force of the solar cell 8, and the fan 13 rotates. Therefore, outside air is introduced into the passenger compartment 1a through the opening A of the side window glass shown in FIG. is discharged to. In this way, the interior of the vehicle interior 1a is ventilated, and a rise in temperature within the vehicle interior is prevented even when the vehicle is parked outdoors in the summer. Here, when the sun's rays are strong, the temperature inside the vehicle increases to a high degree, but in such a case, the output of the solar cell 8 also increases, which increases the ventilation capacity, which is very convenient.

In the above-described embodiment, only the vehicle compartment 1a is ventilated.
Ventilation a and 1b may be performed at the same time.
In this case, the ventilation blower may be provided in the trunk compartment 1b, and the bimetal switch 22 may also be provided in the trunk compartment 1b.

Further, in the above embodiment, the bimetal switch 22 constitutes the temperature detection means and the electric circuit switching means, but a temperature sensing element such as a well-known thermistor is used as the temperature detection means, and as the electric circuit switching means. It goes without saying that a well-known switch circuit that performs a switch operation by determining the detection signal of the temperature sensing element may be used.

Further, the mounting location of the solar cell 8 is not limited to the sun visor 6, and various locations such as the sun visor above the side window glass, the trunk lid 1c (FIG. 1), etc. can be selected.

〔Effect of the invention〕

The present invention is as described above, and when the temperature inside the car is low and there is no need to ventilate the inside of the car, the on-board battery 24 can be automatically charged by the solar battery 8 when the car is parked outdoors, so it can be used for a long time. There is no need to increase the battery capacity in anticipation of parking for a long time, the on-vehicle battery 24 can be downsized, and the cost and weight of the on-vehicle battery 24 can be reduced, which is a great effect.

Further, when the temperature inside the car rises to a predetermined temperature or higher when the car is parked outdoors, this is detected by the temperature detection means and the electric circuit switching means is switched to operate, thereby disconnecting the solar cell 8 from the car battery 24. Since the ventilation fans 12 and 13 are shut off and connected to the ventilation fans 12 and 13, and the ventilation fans 12 and 13 are operated by the electrical energy of the solar cell 8, the ventilation inside the passenger compartment 1a and the trunk compartment 1b of the automobile is improved. As a result, it is possible to maintain the interior of these at a relatively low temperature, and as a result, it prevents deterioration and decomposition of living things such as food and drinks, discomfort for passengers due to hot air inside the vehicle, and furthermore, from resin products, adhesives, etc. It is highly effective in eliminating problems such as the generation of bad odors.

Moreover, since the ventilation blowers 12 and 13 are powered from the solar cell 8, there is no risk of over-discharge of the vehicle battery 24 even if the ventilation blower is operated while the vehicle is parked, and the solar cell 8 Since the output of the ventilation fan 12, 13 is directly applied to the ventilation blowers 12 and 13, the ventilation air volume can be increased accordingly as the sunlight becomes stronger, which is a great effect.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an automobile showing an embodiment of the present invention, FIG. 2 is a partial sectional view of the automobile showing the sun visor shown in FIG. 1, and FIG. FIG. 4 is a cross-sectional perspective view showing the visor, and FIG. 4 is an electric circuit diagram of an embodiment of the present invention. 1...car, 3...rear window, 6...sun visor,
8...Solar cell, 10...Ventilation device, 12, 13...Electric motor and fan forming a ventilation blower, 22...Bimetal switch forming temperature detection means, 24...Vehicle battery.

Claims (1)

[Scope of Claims] 1. (a) An automobile equipped with an on-board battery that supplies power to on-board equipment, (b) a solar cell installed on the body of the automobile and converting solar energy into electrical energy, and (c) (d) a temperature detection means for detecting the temperature inside the automobile; and (e) a ventilation blower installed to exchange air inside and outside the automobile; (e) a temperature detection means for detecting the temperature detected by the temperature detection means; When the detected temperature is below a predetermined temperature, the solar cell is connected to the on-vehicle battery and the on-vehicle battery is charged by the solar cell, and when the detected temperature is above a predetermined temperature, the solar cell is disconnected from the on-board battery and the ventilation is performed. 1. A ventilation system for an automobile, comprising an electric circuit switching means that is connected to a ventilation blower and operates the ventilation blower using a solar battery.