JPH0637028U - Defogger and defroster that use engine residual heat - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent fog and freezing of the windshield to maintain good visibility. [Composition] Warm air that uses the remaining heat of the engine to warm the windshield from the outside.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is intended to prevent fog and freezing of the windshield of a car and maintain a good visibility during driving.

[0002]

[Prior art]

 A conventional car defogger acts only on the interior side.

Conventional vehicles use air conditioners to remove fog.

In a conventional vehicle, the warm air that has passed through the engine room is used as waste heat.

[0005]

[Problems to be solved by the device]

 Condensation of moisture in the air on the cold glass reduces visibility.

In the case of running in the rain, heat of vaporization is taken when the water droplets evaporate, so that the water drops further and clouding occurs.

[0007] During the rainy season, the use of warm defogger makes the room hot.

During the rainy season, using an air conditioner makes it cold and consumes a lot of gasoline.

Auto air conditioners are expensive.

Under conditions of snowfall in an extremely cold area such as ski drive, once melted snow is frozen again on the wiper, resulting in poor wiping.

[0011]

[Means for Solving the Problems] Hot air that uses the residual heat of the engine is also blown to the outside of the windshield.

[0012]

[Action]

 As the temperature of the windshield rises and it does not fog and does not freeze, you can maintain a good view.

[0013]

【Example】

There are combinations of natural air (without using a dedicated blower fan), forced air, with or without a dedicated radiator, and with or without a duct for treating warm air.

First, the simplest case of only natural air supply will be described. As shown in Fig. 1, the air heated from the radiator through the engine room is blown onto the windshield through the opening in the bonnet.

If this is combined with a forced fan, it will function even when the vehicle is stopped or the radiator fan is stopped.

If this is combined with a duct, concentrated air can be partially blown.

Consideration will be given to measures against odor in the engine room. To do so, as shown in Fig. 2, an intake duct and an exhaust duct can be attached to a dedicated radiator and external air can be blown by a forced fan.

In this case, it is necessary to take measures against engine overcooling.

For example, the radiator is shifted to the upper rear part, and the air passage is switched between the normal time and the defogger time. .

[0021]

[Effect of device]

 The windshield warms up, the inside of the room does not fog, and the wiper does not freeze, maintaining good visibility.

Energy is saved without using an air conditioner.

It is effective utilization of waste heat.

During traveling, some effect can be expected on the rear window and side windows due to the flow of air.

The heating efficiency is increased. It is especially effective for open car type vehicles.

The inside of the room is heated as a foot so that the head heat can be maintained and the drowsiness can be prevented to contribute to safe driving.

[0027]

[Brief description of drawings]

FIG. 1 is an operation diagram of a hot air defogger that uses residual heat in an engine room and a flow of hot air.

FIG. 2 is a warm air defogger using a dedicated radiator and fan.

[Explanation of symbols]

 A engine B dedicated radiator and fan C intake duct D exhaust duct

Claims (1)

[Scope of utility model registration request] 1. A defogger and a defroster for blowing warm air utilizing the residual heat of an engine to the outside of a windshield.