JP2549894Y2 - Heating equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating device for heating an automatic drain valve of an air dryer and a washer liquid in a washer tank.

[0002]

2. Description of the Related Art In order to clean a front window glass of an automobile and secure a view, it has been practiced to spray a washer liquid onto a glass surface and wipe the glass surface with a wiper.

[0003] In the case of a truck, the washer tank for storing the above-mentioned washer liquid is disposed in a place where the traveling wind is applied, such as directly below the floor of the passenger seat in the passenger compartment.
If the outside air temperature drops extremely, the washer liquid may freeze.

In order to prevent the freezing, the antifreeze may be mixed with the washer liquid. However, in a summer or the like when there is no fear of freezing, the antifreeze must be replaced with a washer liquid containing no antifreeze. In addition, the maintenance is complicated and the operation cost is high.

Therefore, in order to solve such a problem, a heater is conventionally built in a washer tank in advance.
Thus, when the outside air temperature decreases and the dedicated thermostat is turned on, the heater generates heat, thereby heating the washer liquid and preventing freezing.

[0006]

However, in the above-mentioned conventional means, not only a heater but also a dedicated thermostat is required, so that maintenance is complicated and cost is increased.

The present invention has been made in view of the above-described embodiment, and has as its object to provide a heating apparatus that does not require the use of a dedicated thermostat for heating a washer liquid.

[0008]

According to a first aspect of the present invention, a sensor is turned on when a temperature of a sensing portion falls below a predetermined temperature.
A thermostat provided on the upstream side in the energization direction and the thermostat;
Turn on the auto drain valve when the stat is turned on.
To heat the thermostat on the downstream side in the energization direction.
Provided with a heater, and the thermostat
How to energize the thermostat so that it is in series with the heater
Air dryer with battery connected on the upstream side
Between the thermostat and the heater.
It is obtained by connecting a heater built in the tank, and the second invention is On when the sensing unit is equal to or lower than a predetermined temperature
A thermostat provided on the upstream side
When the thermostat is turned on, turn on the power and
Energizing direction of the thermostat so as to heat the valve
A heater provided on the downstream side, and the thermos
Thermostat so that it is in series with the tut and heater
Air dryer with a battery connected upstream of the
A relay is provided between the thermostat and the heater.
Connect the coil of
Side, the heater built in the washer tank is connected
A contact that turns on when the coil of the relay is energized
Are connected .

[0009]

According to the first invention, when the thermostat is turned on, the heater of the air dryer generates heat and the auto drain valve is turned on.
Is heated, the washer tank heater generates heat, and
In the second invention, when the thermostat is turned on, the heater of the air dryer generates heat and the washer fluid is heated.
With Todorenbarubu is heated, the coil becomes the contact is energized on, washer fluid is Ru is heated by heat generation heater washer tank by current from the contacts.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows an embodiment of the heating device of the present invention.

In FIG. 1, reference numeral 1 denotes a battery, and 2 denotes an air dryer. The air dryer 2 includes a thermostat 4 and a heater 5 connected in series to the battery 1 by a wiring 3 in order to prevent the auto drain valve from freezing. Have. A key switch 20 and a fuse 21 are connected in series in the middle of the wiring 3.

Reference numeral 6 denotes a wiring connected to the wiring 3 between the thermostat 4 and the heater 5. The wiring 6 is connected to a heater 8 built in the washer tank 7, and heats the washer liquid 9 in the washer tank 7. It is possible to do.

The thermostat 4 is turned on when the temperature of the sensing section becomes lower than a predetermined temperature. Therefore, when the key switch 20 is turned on, the electric current from the battery 1 is supplied from the wiring 3 to the heater 5 of the air dryer 2, and the heater 5 generates heat, thereby heating the auto drain valve and preventing freezing.

At the same time, the current is supplied from the wiring 6 to the heater 8 of the washer tank 7, and the heater 8 generates heat, thereby heating the washer liquid 9 and preventing the washer liquid 9 from freezing. When the thermostat 4 is turned off, the heaters 5 and 8 stop.

As described above, since the thermostat 4 of the air dryer 2 can be used also as the heater 8 of the washer tank 7, maintenance is easy and the cost is low.

FIG. 2 shows another embodiment of the heating device of the present invention.

In the figure, reference numeral 11 denotes a relay,
The coil 12 is connected between the thermostat 4 of the wiring 3 and the heater 5 via the wiring 14 and connected to the minus side of the battery 1 via the wiring 15. Is connected to the wiring 3 on the upstream side of the thermostat 4 in the direction of conduction D with respect to the thermostat 4, and is connected via the wiring 17 to the heater 8 built in the washer tank 7. 18 is the ground,
In the figure, the same components as those shown in FIG. 1 are denoted by the same reference numerals.

When the temperature of the sensing portion of the thermostat 4 becomes lower than a predetermined temperature while the key switch 20 is turned on, and the thermostat 4 is turned on, power is supplied from the wiring 3 to the heater 5 via the thermostat 4, and the heater 5 generates heat. The auto drain valve is heated. Further, the current from the battery 1 is supplied to the coil 12 of the relay 11 from the wiring 3, the thermostat 4, and the wiring 14, and the coil 12 is excited, so that the contact 13 is turned on. Therefore, the current from the battery 1 flows from the wiring 3 to the wiring 16, the contact 13, and the wiring 17.
To the heater 8 from the wiring 17
Generates heat, and the washer liquid 9 is heated.

When the thermostat 4 is turned off, the heat generation of the heater 5 is stopped, the coil 12 is demagnetized, and the contact 13 is separated, so that the heat generation of the heater 8 is also stopped.

It should be noted that the present invention is not limited to the above-described embodiment, and it is needless to say that various changes can be made without departing from the gist of the present invention.

[0022]

According to the heating device of the present invention, claims 1 and 2
In any of the two, the heater for heating the washer liquid can be controlled by using the thermostat for the air dryer, so that a special thermostat is not required, and the excellent effect that the maintenance is simple and the operating cost is inexpensive is achieved. I can play.

[Brief description of the drawings]

FIG. 1 is a control circuit diagram of an embodiment of the heating device of the present invention.

FIG. 2 is a control circuit diagram of another embodiment of the heating device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Battery 2 Air dryer 4 Thermostat 5 Heater 7 Washer tank 8 Heater 11 Relay 12 Coil 13 Contact 14 Wiring

Claims (2)

(57) [Scope of request for utility model registration] 1. When the temperature of a sensing portion becomes lower than a predetermined temperature, the sensor is turned on.
Thermostat provided on the upstream side in the energizing direction so that
And when the thermostat is turned on,
How to energize the thermostat to heat the ren valve
And a heater provided on the downstream side of the
Thermostat so that it is in series with the stat and heater.
Air dry with a battery connected upstream of the
(C) between the thermostat and the heater,
A heating device characterized by connecting a heater built in a washer tank . 2. The sensor is turned on when the temperature of the sensing unit becomes lower than a predetermined temperature.
Thermostat provided on the upstream side in the energizing direction so that
And when the thermostat is turned on,
How to energize the thermostat to heat the ren valve
And a heater provided on the downstream side of the
Thermostat so that it is in series with the stat and heater.
Air dryer with a battery connected upstream of the
The relay between the thermostat and the heater.
Connected in the direction of energization of the thermostat.
A heater built in the washer tank is connected to the flow side.
Connected when the relay coil is energized.
A heating device characterized by connecting points .