JPS639671A - Gasoline cooling device for vehicle - Google Patents

Abstract

PURPOSE:To suppress production of gasoline vapor, by driving a motor fan with the electromotive force of solar cells and producing wind for cooling the refrigerant in a heat pipe then utilizing said refrigerant for discharging the heat in a gasoline tank to the outside. CONSTITUTION:When a vehicle is parked under high outer air temperature and the temperature in a gasoline tank 10 is increased, refrigerant in a heat pipe 3 arranged in said tank 10 evaporates and ascents to a wind path 1 side. At this time, solar cells 21 receive sunrays to produce power which is fed through a constant voltage control section 73 to a motor 23 for a motor fan 2. Said motor 22 is rotated when an on-signal is provided from a motor fan control section 72 for receiving the output from a tank temperature sensor 6 so as to take the cooling air into the wind path 1. The refrigerant vapor is cooled and liquidized by said cooling air and the liquidized refrigerant moved with self-weight to the tank 10 side so as to take away the heat from the inside of the tank 10.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a gasoline cooling device that suppresses a rise in temperature of gasoline in a gasoline tank when a vehicle is parked under high outside temperatures.

(Prior Art) Conventionally, gasoline tanks of vehicles have been equipped with devices to prevent gasoline vapor generated when gasoline becomes hot from being released into the atmosphere. A fuel vapor gas suppression device is known as described on page B-49 of "Introduction to F31 Series Cars" (published by Nissan Motor Co., Ltd. on February 2, 1986).

This fuel vapor gas suppression device is called a canister and is filled with activated carbon.The activated carbon adsorbs gasoline vapor from the gasoline tank and prevents the gasoline vapor from being released into the atmosphere.

(Problems to be Solved by the Invention) However, in such conventional fuel vapor gas suppression devices, activated carbon adsorbs gasoline vapor to prevent the gasoline vapor from being released into the atmosphere. However, because it did not suppress the generation of gasoline vapor,
There is a problem in that it is not possible to prevent wasteful loss of gasoline due to the generation of gasoline vapor (which can reach up to seven days if the vehicle is parked under high temperatures in the summer).

Furthermore, when gasoline vapor is generated in excess of the adsorption capacity of activated carbon, the gasoline vapor is directly released into the atmosphere, causing air pollution.

Incidentally, a vehicle cooling system using solar cells as a power source (see Japanese Patent Laid-Open No. 61-6017) has been known, but this is a vehicle cooling system that forcibly exhausts hot air from inside the vehicle to the outside of the vehicle using an electric fan. However, it does not suppress the generation of gasoline vapor.

Furthermore, an automobile cooling device (see Japanese Unexamined Patent Publication No. 60-252024) is known that uses a heat pipe, but this is also intended for cooling the inside of a car.

(Means for Solving the Problems) The present invention has been made for the purpose of solving the above-mentioned problems, and in order to achieve this purpose, in the present invention, a , an air duct having an air exhaust port to the outside of the vehicle; a motor fan provided in the middle of the air duct and driven by an electromotive force from a solar cell provided at a position irradiated with sunlight; and one end of which is connected to the gasoline. The heat pipe is disposed inside the tank, the other end of which is located above the one end is disposed in the air passage, and the heat pipe has a refrigerant sealed therein.

(Function) Therefore, in the vehicle gasoline cooling device of the present invention, when the inside of the gasoline tank becomes high temperature when the vehicle is parked or stopped under high outside temperature, the refrigerant in the heat pipe inside the gasoline tank is heated by heat exchange. It evaporates and becomes refrigerant vapor, which moves upward toward the air duct.

On the other hand, under this high outside temperature, the motor fan is driven by the electromotive force from the solar cells that receive the sunlight, and air that becomes cooling air is taken into the ventilation path.

This cooling air cools the refrigerant vapor and turns it into liquid refrigerant, which moves downward toward the gasoline tank by its own weight and returns to the inside of the gasoline tank.Then, the cooling air that has been warmed by absorbing the heat of the refrigerant vapor is released from the exhaust outlet. is discharged outside the vehicle.

After that, the refrigerant in the heat pipe undergoes repeated cooling circulation.
The gasoline in the gasoline tank is cooled by the cooling circulation of the refrigerant.

As mentioned above, the electromotive force generated by the solar cell is used as a power source to drive the motor fan, and the air is used to cool and circulate the refrigerant in the heat pipe while discharging the heat inside the gasoline tank to the outside of the vehicle. This makes it possible to suppress the temperature rise of the gasoline in the gasoline tank and suppress the generation of gasoline vapor, especially when the vehicle is parked or stopped under high outside temperatures.

(Example) Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

In describing this embodiment, an automobile gasoline cooling device will be taken as an example.

First, the structure of the first embodiment shown in FIGS. 1 to 3 will be explained.

The gasoline cooling device A of the first embodiment includes an air passage 1, a motor fan 2, heat pipes 3, 3, a vehicle interior temperature sensor 4,
It includes a vehicle outdoor temperature sensor 5, a gasoline tank temperature sensor 6, and a control unit 7.

The air blow path 1 is arranged at the outer periphery of a gasoline tank 10 disposed at the rear of the vehicle body 100. It has an air intake port 12, an outdoor air intake port 14 opened in the wheel house 13, and an exhaust port 15 opened at the lower part of the rear part of the vehicle body facing the outside of the vehicle. Vehicle interior air and vehicle exterior intake port 1
An inside/outside air switching door 16 is provided at a position where the outside air is mixed with the air taken in from outside the vehicle.

The inside/outside air switching door 16 is a door that switches the introduction of air inside the vehicle and outside the vehicle, and is operated by power such as engine negative pressure. The indoor air intake port 12 is communicated with the exhaust port 15, and the exhaust port 15 and the vehicle exterior air intake port 14 are communicated with each other in the fully open state shown by the imaginary line in the figure.

The motor fan 2 is located in the middle of the air passage 1,
The motor fan 2 is disposed between the inside/outside air switching door 16 and the exhaust port 15, and is driven by a solar cell 21 installed at the rear of the vehicle body, which is the position where the sun's rays are irradiated. It is rotationally driven by an electric motor 22.

The heat pipe 3 has a rear end connected to the gasoline tank 1.
0, and the front end portion is located between the motor fan 2 and the air exhaust port 15, and is arranged in the air passage 1,
It is provided at an angle so that the front end is located above the rear end, and a refrigerant 31 is sealed inside.

The heat pipe 3 is used to cool the inside of the gasoline tank 10 using a refrigerant 31, and cooling fins 32 and 32 are provided at both front and rear ends to enhance the cooling effect.

Note that the heat pipe 3 has characteristics as shown in FIG.

The vehicle interior temperature sensor 4 is a sensor that detects the temperature inside the vehicle interior and outputs a vehicle interior temperature signal (Sl) according to the temperature.

The vehicle exterior temperature sensor 5 is a sensor that detects the temperature outside the vehicle interior and outputs a vehicle exterior temperature signal (Sl) according to the temperature.

The gasoline tank temperature sensor 6 is connected to the gasoline tank 1.
Detects the temperature within 0 and generates a tank internal temperature signal (
This is a sensor that outputs S3).

The control unit 7 includes a door control section 71, a motor fan control section 72, and a constant voltage control section 73.

The door control section 71 receives an inside temperature signal (Sl) and an outside temperature signal (Sl) and outputs a switching control signal (C1) for controlling the inside/outside air switching door 16.

Note that this door control unit 71 has a one-car signal (Sl) (Sl)
The temperature inside the vehicle is compared with the temperature outside the vehicle, and when (Sl)≧(Sl) (when the temperature inside the vehicle is higher than the temperature outside the vehicle), the switching control signal (C1) is used to switch between the inside and outside air. The door 16 is fully opened, and (s+)<(s2
) (when the temperature inside the vehicle is lower than the temperature outside the vehicle), the inside/outside air switching door 16 is fully closed by the switching control signal (c+).

The motor fan control unit 72 inputs the tank internal temperature signal (S3) from the gasoline tank temperature sensor 6 and outputs a drive control signal (C2) for controlling the drive of the electric motor 22 of the motor fan 2 to ON@OFF. It is something.

In this motor fan control section 72, the temperature inside the gasoline tank 10 is compared with a preset temperature by inputting the tank internal temperature signal (S3), and when the temperature inside the gasoline tank 10 is lower than the set temperature. When the voltage is high, the electric motor 22 is activated by the drive control signal (C3) as an ON signal.
is driven using the solar cell 21 as a power source, and when the power is low, the electric motor 22 is stopped by a drive control signal (C3) as an OFF signal.

The set temperature is set to a temperature that suppresses gasoline vapor.

The constant voltage control section 73 converts the electromotive force (2) generated by the solar cell 21 into a constant voltage VT and supplies it to the electric motor 22 to improve fan efficiency.

Next, the operation of the embodiment will be explained.

When the inside of the gasoline tank 10 becomes high temperature when the vehicle is parked or stopped under high outside temperature, the refrigerant 31. , and moves upward toward the ventilation path 1 side.

On the other hand, under this high outside temperature, the solar cell 21 receives sunlight and generates electricity, and the electromotive force () is converted into a constant voltage VT by the constant voltage control section 73 and supplied to the electric motor 22 of the motor fan 2. Since the temperature inside the gasoline tank 10 is high, this electric motor 22 is operated by the motor fan control unit 7.
The motor fan 2 is driven by inputting a drive control signal (C2) as an ON signal from the motor fan 2 .

Air, which becomes cooling air, is taken into the air passage 1 by driving the motor fan 2.

At this time, when the temperature inside the vehicle is lower than the temperature outside the vehicle, the inside/outside air switching door 16 is fully closed, the exhaust port 15 is communicated with the interior air intake port 12, and the cooling air inside the vehicle is taken in. In addition, when the temperature inside the vehicle is higher than the temperature outside the vehicle, the inside/outside air switching door 16 is fully opened and the exhaust port 15 is opened.
is communicated with the exterior air intake port 14 to take in cooling air from outside the vehicle.

This cooling air cools the refrigerant vapors 31a, 31a and turns them into liquid refrigerants, which moves downward to the gasoline tank 10 side due to its own weight and returns to the inside of the gasoline cooling device O, and then absorbs the heat of the refrigerant vapors 31a. The warmed cooling air is discharged from the exhaust port 15 to the outside of the vehicle.

Note that the refrigerant 31 in the heat pipe 3 is repeatedly cooled and circulated, and the cooling circulation of the refrigerant 31 causes the gas tank 1 to
When the inside of 0 is cooled down to a low temperature, the motor fan control unit 72 sends the drive control signal (C2) as an OFF signal.
is output, the electric motor 22 stops driving, and the rotational drive of the motor fan 2 is also stopped.

As a result, the cooling circulation of the refrigerant 31 is stopped, and the cooling inside the gasoline tank 10 by the heat pipe 3 is stopped.

Therefore, in the gasoline cooling device A of the embodiment, the motor fan 2 is driven using the electromotive force V generated by the solar cell as a power source, and the refrigerant 3 of the heat pipes 3, 3 is blown by the motor fan 2.
By releasing the heat in the gasoline tank 10 to the outside of the vehicle while cooling and circulating 1.31, the gasoline in the gasoline tank 10 can be cooled, especially when the vehicle is parked at high outside temperatures. , the generation of gasoline vapor can be suppressed.

In addition, by comparing the temperature inside the vehicle and the temperature outside the vehicle, air is taken into the air passage 1 from the side with a lower temperature, so the cooling efficiency of the heat pipe 3 can be increased, and the temperature inside the vehicle is improved. When a vehicle that has been cooled by an air conditioner is parked at a high outside temperature, the cooled interior air can be used as cooling air for the heat pipe 3 without wasting it.

Next, a second embodiment shown in FIG. 4 will be described.

In describing the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals in the drawings and their explanation will be omitted. Furthermore, descriptions of the same effects will be omitted.

In this embodiment, the air passage 200 is configured with a front air passage 210, a rear air passage 220, and a vehicle interior 230.
Reference numeral 10 is formed at the front of the vehicle body having an air intake port 211 outside the vehicle, and a rear air passage 220 is formed at the rear of the vehicle body having an air exhaust port 221 to the outside of the vehicle.
This is an example in which 0.220 is connected.

Note that the front end of the heat pipe 3 and the motor fan 2 are arranged in the rear air passage 220.

Therefore, when the motor fan 2 is driven, the outside intake port 2
Air from outside the vehicle is taken in from the air outlet 11, and the air is sent to the front air passage 210 → the vehicle interior 230 → the rear air passage 220, and after cooling the heat pipe 3 in the rear air passage 220, it is sent to the outside of the vehicle from the air exhaust port 221. is discharged to.

Therefore, when the vehicle is parked or parked at a high outside temperature, it is possible to suppress the rise in temperature of gasoline in the gasoline tank 10 and the generation of gasoline vapor, and also to reduce the temperature of the vehicle interior 230 by replacing the air inside the vehicle. This prevents the temperature inside the vehicle from rising abnormally when the vehicle is parked or stopped under high temperatures.

Although the embodiments of the present invention have been described above in detail with reference to the drawings, the specific configuration is not limited to these embodiments, and the present invention may be modified without departing from the gist of the present invention. included.

For example, although two heat pipes are used in the embodiment, the number and shape of the heat pipes are not limited to those shown in the embodiment.

Further, one end portion of the heat pipe may be placed in gasoline liquid or gasoline vapor.

In addition, in the example, an example was shown in which the inside air and outside air are switched by the inside and outside air switching door, but when the car is parked, the inside and outside air is switched by temperature control as in the example, and when the car is running and the air conditioner is turned on, the inside air is switched between inside and outside air. In order to prevent a sudden drop in the cooling effect of the air conditioner, the opening degree of the door may be controlled as in an air mix door to mix the inside and outside air.

Further, gasoline temperature control and constant voltage control of the motor fan are not necessarily required.

(Effects of the Invention) As explained above, in the vehicle gasoline cooling device of the present invention, the motor fan is driven using the electromotive force generated by the solar cell as a power source, and the refrigerant in the heat pipe is cooled by the air flow. By circulating the heat inside the gasoline tank and releasing it to the outside of the vehicle to cool the inside of the gasoline tank, the temperature of the gasoline inside the gasoline tank can be reduced, especially when the vehicle is parked or parked under high outside temperatures. This has the effect of suppressing the generation of gasoline vapor due to rising.

Therefore, the above-mentioned effects can prevent wasteful loss of gasoline due to the generation of gasoline vapor, and can also prevent air pollution due to the release of gasoline vapor into the atmosphere.

In addition to the above-mentioned effects, in the first embodiment, the temperature inside the vehicle interior is compared with the temperature outside the vehicle interior, and air is introduced into the ventilation path from the lower temperature side. In addition, when a vehicle whose interior has been cooled by an air conditioner is parked at high outside temperatures, it is possible to cool the heat pipe without wasting the cooled interior air. Can be used as air.

In addition, in the second embodiment, since the cooling air of the heat pipe is taken in from outside the vehicle and exhausted to the outside of the vehicle through the interior of the vehicle, when the vehicle is parked under high outside temperatures, the gas tank It is possible to suppress the temperature rise of the gasoline inside the vehicle and suppress the generation of gasoline vapor, and it is also possible to suppress the temperature rise inside the vehicle interior by replacing the air in the vehicle interior.

[Brief explanation of drawings]

Fig. 1 is an overall view showing an automobile gasoline cooling device according to the first embodiment of the present invention, Fig. 2 is a sectional view showing the main parts of the device according to the first embodiment of the present invention, and Fig. 3 is an example of the characteristics of a heat pipe. FIG. 4 is an overall view showing a gasoline cooling device for an automobile according to a second embodiment of the present invention. 1...Blower channel 2...Motor fan 3...Heat pipe 10...Gasoline tank 15...Exhaust port 21...Solar cell 31...Refrigerant patent application Hito Nippon Radiator Co., Ltd. Copper/water/group heat pipe unit (mm
) Total length -300

Claims (1)

[Scope of Claims] 1) An air blower path disposed on the outer periphery of the gasoline tank and having an air exhaust port to the outside of the vehicle, and a solar cell installed in the middle of the air blower path at a position irradiated with sunlight. a motor fan driven using electric power as a power source, one end of which is disposed inside the gasoline tank, and
A gasoline cooling device for a vehicle, comprising: a heat pipe whose other end above the one end is disposed in the air passage, and in which a refrigerant is sealed.