JPH08113115A - Defrosting and decing device for vehicle window glass - Google Patents

Abstract

PURPOSE: To provide a device for eliminating frost and ice stuck to vehicle window glass in a short time. CONSTITUTION: A defrosting and deicing device for a vehicle window glass comprising a liquid storing vessel 1 and a liquid transporting pipe 4 for linking together a liquid pressure feed pump 2 and a nozzle 3 for ejecting liquid to a vehicle window glass surface, is constituted in a manner that a portion of the liquid transporting pipe is placed in the exhaust pipe 11 of an internal combustion engine and used as a heat exchange part for heating liquid flowing through an external liquid transporting pipe by means of indirect heat exchange with an exhaust gas of the internal combustion engine.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a defrosting and deicing device for vehicle windshields, and more particularly to a defrosting and deicing device for vehicle windshields driven by an internal combustion engine such as an automobile.

[0002]

2. Description of the Related Art If a vehicle such as an automobile is left outdoors during the winter, frost and ice adhere to the windshield glass, and it is very difficult to remove it.

[0003] Normally, an automobile is provided with a heater for indoor heating, but it takes ten minutes or more for the interior of the vehicle to warm up and the frost and ice of the glass to thaw after the engine is started, in case of emergency. It's useless for. Also, depending on the vehicle, there is one that embeds a resistance wire for an electric heater in the windshield to remove water droplets attached to the windshield.
Since the heating capacity of the resistance wire is small, a large amount of heat is required to remove frost and ice. Also, embedding a resistance wire in the windshield is not preferable because it hinders the operator's visual field.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned drawbacks and to provide a device for removing frost and ice adhering to a vehicle windshield in a short time.

The present invention utilizes the heat of the exhaust gas of an internal combustion engine to melt frost or ice adhering to the windshield and remove it in a short time.

[0006]

To this end, there is provided a liquid transport pipe for connecting a liquid storage container, a liquid pressure pump, and a nozzle for jetting a liquid onto the surface of a window glass for a vehicle. Is partly installed in the exhaust pipe of the internal combustion engine to heat the liquid flowing in the liquid transport pipe by indirect heat exchange with the exhaust flowing in the exhaust pipe of the internal combustion engine.

The structure of the heat exchange section can take various forms, but it has a shape that obstructs the flow of exhaust gas in the exhaust pipe, or is deformed or corroded by the temperature of exhaust gas or corrosive gas. Such a material is not preferable.

From this point of view, the following can be listed as a recommended form. (1) Pass a straight pipe for liquid transportation in the exhaust pipe.
In this case, it is preferable that the liquid transport pipe is attached in close contact with the inner wall of the exhaust pipe, or a concave groove for accommodating the pipe is vertically provided on the inner surface of the exhaust pipe and the pipe is accommodated in this groove. (2) A liquid transportation pipe is spirally wound around the outer circumference of the exhaust pipe. In this case, it is preferable that a heat insulating material is further wound around the pipe to provide a heat retaining structure.

(3) A bypass passage is provided in the exhaust pipe, and a spiral liquid transport pipe is connected to the bypass passage. In this case, install a damper at the entrance of the bypass,
When the device is not in use, the damper is preferably configured to close the entrance of the bypass passage. It is not preferable to open the bypass passage at all times because the resistance of the exhaust gas is increased, the output of the engine is adversely affected, the deterioration of the liquid transport pipe is accelerated, and the life of the device is shortened.

When the apparatus is not used, it is necessary to drain water in the liquid transport pipe. Especially, when water is put in the liquid transport pipe when the vehicle is running,
The water is heated and boils, and hot water is ejected from the nozzle, which is dangerous. Therefore, it is preferable to provide a gas vent valve and a liquid vent valve in the middle of the liquid transportation pipe. In addition, these valves are three-way valves that are interlocked with the opening and closing of a liquid pressure pump. When the pump is on, the gas vent valve and the liquid vent valve are turned off, and when the pump is off, the gas vent valve is turned off. ,
Configure the drain valve to turn on.

It is preferable that the liquid jetting nozzle is constructed so that the liquid jetting direction of the nozzle can be arbitrarily selected. For that purpose, it is preferable to use a link mechanism so that the tip of the nozzle swings at a constant angle. Further, a step motor or the like may be used to rotate the switch by a constant angle in response to opening and closing of the switch.

[0012]

[Function] When the pump is turned on after the engine is started, the water in the liquid storage container reaches the heat exchanger through the on-off valve and the three-way valve by the liquid transport pipe, is heated by the exhaust heat, and becomes hot water. Then, after passing through the three-way valve, it is jetted from the nozzle to the wind glass surface.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. (Embodiment 1) FIG. 1 shows an embodiment in which a straight pipe for liquid transportation is passed through an exhaust pipe. In the drawing, 1 is a liquid storage container, 2 is a liquid pressure pump, 3 is a liquid jet nozzle, 4 is a liquid transport pipe, 5 is a heat exchange part, and an exhaust pipe 11 connected to a manifold 10 of an engine is provided. A straight liquid transport pipe 4 is passed through. Moreover, in order to reduce the exhaust resistance, the exhaust pipe 1
It is preferable that the liquid transport pipe is embedded in the vertical groove 13 formed by making a part of the outer peripheral surface 1 uneven. Three-way valves 6 and 7 are provided in the middle of the liquid transport pipe 4, and when defrosting and deicing the wind glass, the liquid transport pipe 4 connects the three-way valves 6 and 7 to the communication side of the liquid transport pipe 4. It is rotated. Further, when defrosting and deicing are stopped, the liquid transport pipe 4 is rotated to the closing side, and the liquid drain valve 6 ′ of the three-way valve 6 and the gas vent valve 7 ′ of the three-way valve 7 are opened to transport the liquid. It is designed to discharge the liquid and air in the pipe. The control of the three-way valves 6 and 7 may be performed manually, but it is preferable that the three-way valves 6 and 7 can be electrically opened / closed in conjunction with opening / closing of the pump 2. In addition, 12 is a muffler.

In order to operate the defrosting / deicing device, after the engine is started, the three-way valves 6 and 7 are communicated with the liquid transport pipe 4, and the liquid vent valve 6'and the gas vent valve 7'are connected. Pivot to close. After that, when the pump 2 is turned on, the water in the liquid storage container 1 reaches the heat exchanger 5 through the three-way valve 6 and the liquid transport pipe 4, and the inside of the exhaust pipe 11 connected to the engine manifold 10. Is heated by the exhaust heat from the exhaust gas of the three-way valve 7
And is sprayed from the nozzle 3 onto the wind glass surface.

In order to stop the defrosting / deicing device, first, the pump 2 is switched off to stop the liquid supply. Next, the liquid transport pipe 4 is closed by the three-way valves 6 and 7, and the liquid release valve 6 ′ and the gas release valve 7 ′ are rotated so as to be opened. As a result, the liquid transport pipe 4 is emptied, and the overheated water or gas is prevented from being ejected from the nozzle 3.

(Embodiment 2) FIG. 2 shows an embodiment in which a liquid transfer pipe is spirally wound on the outside of the exhaust pipe 11 to form the heat exchange section 5, and other structures are provided. Is almost the same as in the first embodiment. Reference numeral 16 is a heat insulating layer provided to apply a heat insulating material from above the liquid transport pipe of the heat exchange section 5 to increase the heat exchange rate.

(Embodiment 3) FIG. 3 shows a case in which the exhaust pipe 11 is branched to provide a bypass pipe 13, and a spiral liquid transport pipe 4 is provided in the bypass pipe 13 to form the heat exchange section 5. FIG.

Dampers 14 and 15 are provided at the inlet and outlet of the bypass pipe 13, respectively. Damper 1
4, 15 are switched simultaneously by a switching device 24 which is driven by closing the switch 18. The three-way valves 6 and 7 provided on the liquid transport pipe 4 are closed by the electromagnetic mechanisms 21 and 22 driven by closing the switch 19 so that the liquid transport pipe 4 is connected to the communicating side when degassing and draining liquid. Is rotated to the side. The open / close valve 8 is a switch 19
It is opened by the electromagnetic mechanism 23 driven by closing. In addition, 9 is a rocking device for rocking the nozzle 3, 17 is a motor for the rocking device, and 20 is a power supply.

FIGS. 4, 5 and 6 are for explaining the details of the heat exchanging portion. The heat exchanging portion 5 is constructed as a unit and is detachable from the bypass pipe 13. That is, the spiral pipe 36 forming the heat exchange section 5 is housed in the cylindrical straight pipe 35 having the flanges 40 and 42 at the top and bottom. The flanges 40 and 42 on both ends of the straight pipe 35 are joined to the flanges 41 and 43 provided on the cut surface of the bypass pipe 13 facing the straight pipe 35, and the bolt holes 44, 44 provided on these flanges are joined.
Pass the bolt through and tighten with the nut. In addition,
Reference numeral 39 is a stopper for the spiral pipe 36.

Connection nuts 37, 37 each having a thread groove inside are fixed to the start end and the end of the spiral pipe 36, respectively. For connection with the external liquid transport pipe 4, joint pipes 38, 38 having screw grooves at both ends are used. In addition, 39 is a shake prevention pin of the spiral pipe.

The levers 30 and 31 are fixed to the rotary shafts of the dampers 14 and 15, respectively, and are connected by a connecting rod 32, so that the dampers 14 and 15 are rotated in opposite directions.

FIGS. 7 and 8 show a rocking device for rocking the nozzle 3. Reference numeral 50 denotes a short rod, which is fixed to a rotary shaft 57 of the motor 17 fixed to the back surface of the base 56. Reference numeral 52 is a swinging rod that is rotatably fixed to the base 56 and has a nozzle 3 at the tip thereof.
Is fixed to the rotary shaft 59 provided at the rear end of the connecting rod 5.
One end of 1 is rotatably attached to the shaft, and the other end of the connecting rod 51 is
A rotary shaft 58 provided on the short rod 50 is rotatably attached to the rotary shaft 58. The tip of the nozzle 3 is flattened so that the liquid is discharged in a wide range.

The rotating shaft 53 of the swing rod 52 is constructed as a hollow screw rod, and the swing rod 52 is attached to the base 5 via a washer 54.
6 is pivotally fixed to the shaft. The flexible rubber pipe 55 having the nozzle 3 at the tip is fixed along the swing rod 52, and is connected to the liquid transport pipe 4 through the hollow hole of the rotary shaft 53.

In order to operate the defrosting / deicing device, first, the engine is started and then the switch 18 is closed.
The damper 14, so that the flow path of the exhaust gas passes through the bypass pipe 13,
Switch 15 Next, the switch 19 is closed and the on-off valve 8 is turned on, and at the same time, the three-way valves 6 and 7 are in communication with the liquid transport pipe 4, and the liquid vent valve 6 ′ and the gas vent valve 7 ′ are closed. Rotate. After that, when the pump 2 is turned on, the water in the liquid storage container 1 passes through the on-off valve 8, the three-way valve 6 by the liquid transport pipe 4, and then the heat exchanger 5
And is heated by the exhaust heat from the exhaust gas of the engine,
It becomes hot water and is sprayed from the nozzle 3 to the wind glass surface through the three-way valve 7. In order to change the ejection direction of the nozzle 3, the motor 17 may be turned on and the rocking device 9 of the nozzle 3 may be driven.

In order to stop the defrosting / deicing device, first, the pump 2 is switched off to stop the liquid supply. Next, the switch 18 is opened, the switching device 24 is reversed, and the damper 14, so that the bypass pipe 13 is closed.
Rotate 15. The switch 9 is opened and the on-off valve 8 is closed, and at the same time, the liquid transfer pipe 4 is opened by the three-way valves 6 and 7.
Is closed, and the liquid vent valve 6'and the gas vent valve 7'are rotated so as to open. As a result, the inside of the liquid transport pipe 4 becomes empty, and it is possible to avoid the risk of overheated water or gas being jetted from the nozzle 3. Furthermore, the heat exchange unit 5
Is separated from the exhaust pipe 11, so that the spiral pipe 36 can be prevented from being overheated and damaged.

In each of these embodiments, the exhaust pipe or the bypass pipe attached to it is arranged vertically, but the exhaust pipe or the bypass pipe attached to it may be installed sideways depending on the vehicle type. . Further, although the heat exchange section provided in the bypass pipe is configured as a straight pipe, it may be configured as a meandering pipe.

[0027]

EFFECT OF THE INVENTION Defrosting of the vehicle windshield of the present invention,
Since the deicing device is provided with the heat exchange part that indirectly heats the liquid by the exhaust of the engine, hot water of about 80 ° C. can be obtained in about 30 seconds after starting the engine. Even if frost or ice forms on the wind glass due to the vehicle being left outdoors, if this hot water is sprayed from the nozzle onto the wind glass, the ice adhered to the glass can be dissolved and removed within one minute.

This device is not limited to the windshield,
Even rear glass and side glass can be easily handled by slightly changing the nozzle piping.

[Brief description of drawings]

FIG. 1 is a front view of a vehicle window glass defrosting and deicing device according to an embodiment of the present invention.

FIG. 2 is a front view of a vehicle window glass defrosting and deicing device according to another embodiment of the present invention.

FIG. 3 is a front view of a vehicle window glass defrosting and deicing device according to still another embodiment of the present invention.

FIG. 4 is a partially enlarged vertical cross-sectional view of the device of FIG.

5 is a partially enlarged cross-sectional view of the device of FIG.

6 is a partially enlarged cross-sectional view of the device of FIG.

FIG. 7 is a plan view of a nozzle rocking device.

FIG. 8 is a partially enlarged vertical sectional view of the device of FIG.

[Explanation of symbols]

 1 Liquid Storage Container 2 Liquid Pressure Pump 3 Liquid Jet Nozzle 4 Liquid Transport Pipe 5 Heat Exchange Section 6 Three-Way Valve 7 Three-Way Valve 8 Opening / Closing Device 9 Manifold 11 Exhaust Pipe 13 Bypass Pipe 14 Damper 15 Damper 16 Insulation Layer 17 motor

Claims (1)

[Claims] 1. A liquid transportation pipe for connecting a liquid storage container, a liquid pressure pump, and a nozzle for ejecting a liquid onto the surface of a window glass for a vehicle. A part of the liquid transportation pipe is connected to an internal combustion engine. Defrosting and defrosting a vehicle windshield, which is installed in an exhaust pipe and is used as a heat exchange part for heating a liquid flowing in the liquid transport pipe by indirect heat exchange with exhaust gas of an internal combustion engine. Ice equipment.