JPH01301436A - Hot water ejector of washer nozzle - Google Patents

Abstract

PURPOSE:To remove sticking ice without using a special heat-exchanger using hot water which is drained after cooling an engine by placing a change-over valve in each of a window washer liquid supply pipe and an engine cooling water pipe and laying a hot water bypass pipe connecting these valves to each other. CONSTITUTION:A change-over valve 6 is mounted in the middle of a line of both cooling water circulation pipes 3 and 4 which connects an engine 1 to a radiator 2. Another change-over valve 13 is mounted in a pipe connecting a washer tank 8 to a washer pump 10. A hot water bypassing pipe 7 connects the change-over valves 6 and 13 to each other. The change-over valves 6 and 13 are changed and hot water after it cools the engine 1 is ejected against a front window 12 via a washer pump 10 and a washer nozzle 11. Pieces of ice and frost stuck to the surface of the window 12 may be removed without the need for mounting a special heat-exchanger using the existing equipment.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a hot water injection device for a washer nozzle.

[Prior Art] When a car is left outdoors in the winter, frost and ice build up on the windshield. Until now, this frost and ice had been melted by scraping it off with a scraper or by idling the car until the air inside the car was warmed by heating the car.

However, these methods were time-consuming, and if you were in a hurry, you would have to start the car before the boxes and ice had been sufficiently removed, which was dangerous.

Therefore, in recent years, various hot water injection devices that heat and spray water in a washer tank have been proposed in order to quickly remove frost and ice.
There are those shown in Japanese Patent Application Laid-open No. 8451 and Japanese Patent Application Laid-Open No. 62-268759.

[Problems to be Solved by the Invention] However, each of the above devices heats water from the washer tank with engine exhaust gas, so extra equipment such as a heat exchanger is required. However, there are problems such as an increase in the size of the device and an increase in price.

In view of the above-mentioned circumstances, the present invention has been made with the object of providing a small and inexpensive hot water injection device for a washer nozzle.

[Means for Solving the Problems] The first invention connects a hot water bypass pipe via a switching valve to a pipe that supplies hot water after cooling an engine, and supplies washer fluid to a washer nozzle. The hot water bypass pipe is connected to the hot water bypass pipe through a switching valve different from the switching valve.
In addition to the structure of the invention, a temperature detector is provided in the pipe that supplies hot water after cooling the engine, and if the hot water detected by the temperature detector is outside the predetermined temperature range, the temperature of each switching valve is In the third invention, in addition to the first or second invention, a computer is provided which gives a switching command to at least one of the switching valves so that hot water is not injected from the washer nozzle. A make-up water tank is installed to replenish water, a liquid level detector is attached to the make-up water tank to detect the liquid level, and if the liquid level detected by the liquid level detector is below a predetermined height, each switching valve A computer may be provided to issue a switching command to at least one of the switching valves so that hot water is not injected from the washer nozzle.

[Function] When melting frost or ice, hot water after cooling the engine is sent from the hot water bypass pipe to the pipe that supplies washer fluid to the washer nozzle, and from the pipe It is sprayed through the washer nozzle. In addition, if the temperature of hot water after cooling the engine is detected and the temperature is outside a predetermined temperature range, at least one of the switching valves can be switched so that hot water is not sprayed from the washer nozzle, and the fluid in the make-up water tank is When the surface is detected and the liquid level is below a predetermined level, at least one of the switching valves can be switched so that hot water is not sprayed from the washer nozzle.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of the present invention.

A pipe line 3 for circulating cooling water connects the engine l and the radiator 2.
．． 4, and a make-up water tank 5 for replenishing water to the radiator 2 is also connected, and a hot water bypass pipe 7 is connected to a switching valve 6 connected in the middle of the pipe 4.

Pipe line 9 for passing washer water to washer tank 8
and a washer pump IO is installed in the conduit 9 so that the washer water can be sprayed from the washer nozzle 11 onto the windshield 12 by the pump IO,
Pipe line 9 between washer tank 8 and washer pump 10
A switching valve 13 is installed in the middle of the pipe, and the pipe line 7 is connected to the switching valve 13.

A temperature detector 14 is connected to the portion of the pipe 4 between the thermostat 22 and the engine 1, and a liquid level detector 15 is connected to the makeup water tank 5, and the temperature signal detected by the temperature detector 14 and the liquid level detector 15 are connected to each other. The liquid level signals of the make-up water detected by the controllers are configured to be respectively provided to the computer 16, and the computer 16 is configured to be able to provide command signals to the switching valves 6 and 13.

In the figure, 17 is a changeover switch for hot water injection, I8 is a temperature indicator, 19 is a liquid level indicator, 20 is a switch that starts the prime mover 21 for driving the washer pump, and 22 is a pipe 4.
Thermostat 23 is a bypass pipe for the engine.

When frost or ice forms on the windshield 12, the cooling water circulates between the engine 1 and the bypass pipe 23 when the temperature on the engine exit side is low, and the cooling water circulates between the engine 1 and the radiator when the temperature on the engine exit side is high. It cycles between 2. Then,
When the coolant starts to circulate between the engine 1 and the radiator 2, the selector switch 17 is turned on and the switch 20 is turned on to drive the prime mover 21. For this reason, a command signal is given to the switching valve 6.13 from the computer 1B, and if the hot water temperature is within a predetermined range, the switching valve 6.1
3 is switched and the pipes 4, 7, and 9 are communicated, and the hot water after cooling the engine 1 passes through the pipe 4, the switching valve 6, the pipe 7, the switching valve 13, and the pipe 9, and then the washer pump 10. from the washer nozzle 11 to the windshield 1.
2 to melt frost and ice.

When hot water that has cooled the engine 1 is injected from the washer nozzle 11, the water in the make-up water tank 5 is injected into the radiator 2.
Since the fuel is supplied to the engine 1, there is no problem in cooling the engine 1.

Also, during hot water injection, the temperature of the hot water is detected by the temperature detector I4, and the temperature of the hot water is detected by the liquid level detector 15.
The liquid level is detected, and each detection signal is given to the computer 16. Therefore, if the temperature of the hot water in the pipe 4 after cooling the engine 1 falls outside the predetermined temperature range, or if the liquid level of the water in the make-up water tank 5 falls below a predetermined height, In this case, a command signal is given from the computer 16 to the switching valve 6 or 13 or both the switching valves 6 and 13, and the pipes 4 and 7 or the pipes 7 and 9 or both the pipes 4 and 7.7 and 9 are shut off. Then, injection of hot water from the washer nozzle 11 is stopped, and the water circulates between the engine 1 and the bypass pipe 22 or the radiator 2, thereby preventing the engine 1 from overheating.

Therefore, it is possible to ensure safety.

Furthermore, the temperature is displayed on the temperature display 18, and the liquid level is displayed on the liquid level display 19.
The driver can check the condition of the engine 1 and the level of the water in the make-up water tank 5 because they are displayed on the screen.

In addition, in the embodiment of the present invention, the case where hot water is sprayed onto the windshield has been explained,
It is also possible to inject it to a mirror, etc.; to prevent engine overheating, it is sufficient to have either a temperature detector or a liquid level detector; and other aspects that do not depart from the gist of the present invention. It goes without saying that various changes may be made within this document.

[Effects of the Invention] As explained above, according to the washer nozzle hot water injection device of the present invention, frost and ice can be melted with hot water after cooling the engine, so a special heat exchanger is not required. Therefore, various excellent effects can be achieved, such as the device becoming smaller and cheaper.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of an embodiment of the present invention. In the figure, 1 is the engine, 3.4 is the pipe, 5 is the makeup water tank,
6 is a switching valve, 7 is a pipe line, 8 is a washer tank, 9 is a pipe line,! ■ is the washer nozzle, 13 is the switching valve, 14.1
5 is a temperature detector, and 16 is a computer.

Claims (1)

[Claims] 1) A hot water bypass pipe is connected via a switching valve to a pipe that supplies hot water after cooling the engine, and a pipe that supplies washer fluid to the washer nozzle. A hot water injection device for a washer nozzle, characterized in that the hot water bypass pipe is connected via a switching valve different from the switching valve. 2) A temperature detector is installed in the pipe that supplies hot water after cooling the engine, and if the hot water detected by the temperature detector is outside the predetermined temperature range, at least one of the switching valves is 2. The washer nozzle hot water injection device according to claim 1, further comprising a computer that issues a switching command to the switching valve so that hot water is not injected from the washer nozzle. 3) Install a make-up water tank to replenish water in the pipe that supplies water to the engine, install a liquid level detector to detect the liquid level in the make-up water tank, and measure the liquid level detected by the liquid level detector. Claim 1) or 2, further comprising a computer that issues a switching command so that hot water is not injected from the washer nozzle to at least one of the switching valves when the height is below a predetermined height. ) The hot water injection device for the washer nozzle described in ).