JPS61295155A - Snow melting device for vehicle - Google Patents

Abstract

PURPOSE:To continuously and effectively melt accumulated snow, by disposing feed pipes between a heat-exchanger for obtaining the exhaust heat from an engine and a section where snow is to be accumulated. CONSTITUTION:In a snow melting device, a heat-exchanger 30 for collecting exhaust heat and a heat radiating section 40 are connected with each other by means of a supply side feed pipe 51 and a return side feed pipe 52, the feed pipe 51 being disposed therein with a control valve 53. Further, when the temperature of a windshield glass pane 14 becomes low, a temperature sensor 41 is turned on to actuate a feed pump 54. Further, a water is circulated so that heat obtained from an exhaust pipe 11 by the heat-exchanger 30 is radiated through the heat radiating section 40 to prevent snow from being accumulated, or to melt accumulated snow.

Description

DETAILED DESCRIPTION OF THE INVENTION ``Industrial Application Field'' The present invention relates to a snow melting device for a vehicle that uses heat to melt snow accumulated at important points on a vehicle.

"Prior art" As a conventional snow melting device for vehicles, for example,
There is the one disclosed in Japanese Patent No. 71660, or the one shown in FIG.

In other words, the former uses the hot air around the engine as a heat source by guiding it to key points through ducts, and the latter uses
A heating device, which is usually installed in a car, connects the engine l and a heater core 2 installed in the passenger compartment with fluid pipes 3 and 4, circulates engine cooling water, and radiates heat from the heater core 2. It utilizes the heat of fluid pipe 3.
．． 4, a branch pipe 5.6 is connected to the branch pipe 5.6, and a control valve 7 is interposed in the middle of the path of the branch pipe 5.6, and a heat dissipation section 9 near the window 8 removes the snow accumulated on the window 8 by the heat of the cooling water. It is made to melt.

``Problems to be solved by the invention'' However, with such conventional snow melting devices for vehicles,
The former method, which uses the hot air around the engine, simply collects the hot air around the engine, which is not efficient at collecting heat, and it tends to cool down before the heat is transported to the place where it is needed.
There is a possibility that sufficient snow melting effect may not be obtained.

In addition, in the latter case, which uses the engine's cooling water, the heat that should be dissipated by the heater core 2 is used for snow melting, so it is not possible to sufficiently heat the passenger compartment during severe cold weather.
There was a problem that livability could be impaired.

The present invention has been made by focusing on these conventional problems, and provides a snow melting device for vehicles that solves the above problems by melting snow using engine exhaust heat, which was originally discarded. is intended to provide.

``Means for Solving the Problems'' The gist of the present invention for achieving the above object is to provide a snow melting device for a vehicle that uses heat to melt snow accumulated at important points on the vehicle. A heat exchanger is provided to obtain exhaust heat, and a heat exchange fluid transfer pipe is arranged to form a circulation system between the heat exchanger and a heat radiating section provided at the snow accumulation site, and the engine exhaust heat is A snow melting device for a vehicle is characterized in that it melts accumulated snow.

``Function'' The heat that is effectively collected in the heat exchanger and transferred to the heat exchange fluid is carried to the heat radiating section through the transfer pipe, and is radiated in the heat radiating section installed in the area where snow melting is required. The heat exchange fluid, which has melted the snow and has become relatively low temperature, returns to the heat exchanger through the transfer pipe that forms the circulation path, is heated to a high temperature again, and is circulated through the heat radiation section.

It continuously and effectively melts accumulated snow.

"Example" Hereinafter, one embodiment of the present invention will be described based on the drawings.

1 to 3 show an embodiment of the present invention.

As shown in FIG. 1, the exhaust pipe 11 of the engine 10 includes:
An exhaust purification device 12 containing a catalyst for purifying exhaust gas and a muffler 13 are interposed.

The snow melting device 20 includes a heat exchanger 30 that collects exhaust heat and a heat radiation section 40 that are connected to a transfer pipe 51 on the supply side and a transfer pipe 52 on the return side.
A control valve 53 is interposed in the transfer pipe 51, and a feed pump 54, a liquid tank 55, and a liquid tank 55 are connected to the transfer pipe 52.
A drain valve 56 is interposed, and a circulation system is formed as a whole.

For example, water is sealed in the path of the circulation system as a heat exchange fluid. A liquid level detection sensor 57 is installed in the liquid tank 55.
is provided, and the heat radiation section 40 is provided with a temperature detection sensor 41.

The heat exchanger 30 is formed by winding a heat exchange pipe 31 around the exhaust pipe 11 which has become highly heated immediately after the exhaust gas purification device 12.

As shown in FIG. 2, the heat dissipation section 40 is disposed along the bottom of the windshield glass 14, which is the part of the automobile where snow is most likely to accumulate and which affects driving visibility.

As shown in FIG. 3, the feed pump 54, liquid level detection sensor 57, and temperature detection sensor 41 of the snow melting device 20 are connected in series to the power source 22 via the operation switch 21.

Next, the action will be explained.

While the vehicle is running in the cold season, the circulation system of the snow melting device 20 is filled with water, the liquid level detection sensor 57 is turned on, and the temperature detection sensor 41 constantly monitors the temperature of the water in the system. are doing. When it snows, the driver leaves the operation switch 21 on, and the temperature of the windshield glass 14 is high.
If the temperature is such that there is no risk of snow accumulating, the temperature inside the snow melting device 20 is also relatively high, so the temperature detection sensor 41 remains off and the feed pump 54 does not operate.
Since water is not circulated, the exhaust heat from the exhaust pipe 11 is transferred to the heat dissipation section 40.
It is not transported to the ground and does not have a snow melting effect.

When the windshield glass 14 becomes cold and there is a risk of snow accumulating, the temperature detection sensor 41 is turned on, the voltage of the power supply 22 is applied to the feed pump 54, the feed pump 54 is activated, and water is circulated. The heat obtained from the exhaust pipe 11 in the heat exchanger 30 is transferred to the transfer pipe 51. The heat is transferred through the control valve 53 to the heat radiating section 40, and the heat is radiated by the heat radiating section 40 to prevent the accumulation of snow or melt the accumulated snow.

The internal pressure of the heat exchange fluid in the system of the snow melting device 20 is controlled by a control valve 53 to prevent the internal pressure from increasing dangerously due to water in the system rising. When there is a shortage of water in the system, the liquid level detection sensor 57 is turned off, so the feed pump 54 does not operate and does not malfunction. During the summer when the snow melting device 20 is not used, the water in the system is drained from the drain valve 56.

In the embodiment described in "-", a heat exchanger in which the heat exchange tube 31 is wound around the exhaust pipe 11 is shown, but a general heat exchanger structure such as a fin tube type may be used. Furthermore, the heat exchange fluid is not limited to water, and other appropriate media can be used.

"Effects of the Invention" According to the snow melting device for a vehicle according to the present invention, since the exhaust heat, which was originally discarded, is effectively used to melt snow, snow melting is reliably carried out, and snow accumulation is reduced. The visibility will not be obstructed, various mechanisms will not interfere with the snow and malfunction, and the heating system will not be adversely affected.

[Brief explanation of the drawing]

1 to 3 show one embodiment of the present invention, and the first
2 is a perspective view of the front of an automobile, FIG. 3 is a control circuit diagram, and FIG. 4 is a conceptual layout of a conventional snow melting device. 10...Engine 11...Exhaust pipe 12...
・Exhaust purification device 20...Snow melting device 30...Heat exchanger Fig. 2 Fig. 3 Fig. 4

Claims (1)

[Claims] A snow melting device for a vehicle that uses heat to melt snow that has accumulated at important points on the vehicle is equipped with a heat exchanger that obtains exhaust heat from the engine, and a heat exchanger that connects the heat exchanger with a heat dissipation section that is provided at the snow accumulation site. A snow melting device for a vehicle, characterized in that a heat exchange fluid transfer pipe is arranged to form a circulation system between the two, and accumulated snow is melted by engine exhaust heat.