JPS584652B2 - Automotive steam and hot water cleaning machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION There are two types of car body cleaning machines: low-temperature, high-pressure hot water cleaning machines and high-temperature, low-pressure wet steam steam cleaning machines, each of which has its own features.

In other words, a hot water washer uses cold water at a heating device of approximately 85
After heating the water to below ℃, pressurize it with a pump and spray it from a hot water gun.It is suitable for cleaning mud stains, but because the temperature is relatively low, it is not suitable for cleaning oil stains. is not suitable.

On the other hand, a steam cleaning machine sprays wet steam at a temperature of about 95°C or higher from a steam gun to clean the car body.
High-temperature water of about 85° C. or higher causes xevitation and becomes difficult to suck in with a pump, so it is necessary to provide a pressure pump upstream of the heating device.

However, in order for a boiler to be exempted under the Boiler and Pressure Vessel Safety Regulations, the heating equipment must be
The pressure of the wet steam obtained from the steam cleaning machine is relatively low since it is not possible to apply a pressure higher than cm2.

Conventionally, in order to combine both types of washing machines into one device, for the reasons mentioned above, for example, even if a heating device was shared,
Since two sets of a float tank for water supply and a pump for pressure feeding are required, the device becomes large and complicated, and maintenance is troublesome.

The present invention relates to a washing machine that can perform both types of washing by simply adding some switching valves to a conventional washing machine, and will be specifically described below with reference to the accompanying drawings.

The drawings show how the cleaning machine of the present invention is used as a steam cleaning machine.

The cold water supplied from the water valve 1 is connected to a cold water hose 2,
Water is supplied to the float tank 5 via the first three-way switching valve 3 and the first water supply pipe 4, and the water level is kept constant.

The cold water in the float tank 5 is filtered by a filter 6, passed through a suction pipe 7, is pumped by a pump 8, passes through a first pressure feed pipe 9, a second three-way switching valve 10, and a second pressure feed pipe 11, and is then force-fed to a heating device 12. Ru.

A portion of the cold water pumped by the pump 8 is returned to the float tank 5 through a return pipe 15 that is branched from the first pressure pipe 9 and has a flow rate adjustment valve 13 and an on-off valve 14 in the middle, for reasons to be described later. .

The wet steam generated in the heating device 12 passes through the delivery pipe 16, the third three-way switching valve 17, the steam pipe 18, and the steam hose 19, and is injected from the steam gun 20.

Oh, 21 is a burner, 22 is operated by steam pressure,
An automatic pressure regulating valve 23 automatically controls fuel supply to the burner 21, and 23 is a pressure gauge.

When using the washing machine shown in the drawing as a hot water washing machine,
The three three-way switching valves 3, 10, and 17 are switched, and the on-off valve 14 is closed.

After that, when water is supplied from the water valve 1, the cold water flows through the cold water hose 2, the first three-way switching valve 3, and the second water supply pipe 24.
The water becomes hot water in the heating device 12, and then flows through the delivery pipe 16.
, the third three-way switching valve 17, and the hot water pipe 25, and is stored in the float tank 5 and maintained at a constant water level.

The hot water stored in the float tank 5 is passed through a filter 6
It passes through the suction pipe 7, is suctioned and pressurized by the pump 8 to become high pressure, and passes through the first pressure feed pipe 9, the second three-way switching valve 10, the hot water pipe 26, and the hot water hose 27.
It is sprayed from the hot water gun 28.

Note that 29 detects the temperature of hot water and automatically turns on burner 2.
1 is a mormostat for extinguishing or igniting the fire and keeping the temperature of hot water constant; 30 is a pressure gauge.

As mentioned above, since there is one pump 8, the discharge amount is constant, and since there is one heating device 12, the heat transfer area is constant.

Therefore, even if the amount of fuel supplied to the burner 21 is automatically limited, there is a limit to the change in the heating rate.

However, compared to turning a certain amount of cold water into hot water,
In order to turn this into wet steam, a very large amount of heat is required.

Also, when hot water turns into wet steam, the volume increases significantly.

Taking these points into consideration, when the cleaning machine of the present invention is used as a steam cleaning machine, a portion of the water discharged from the pump 8 is controlled by the flow rate adjustment valve 13 provided in the middle of the return pipe 15. The amount of water that is regulated and returned to the float tank 5 and then pressure-fed to the heating device 12 is adjusted so that it is sufficiently vaporized in the heating device 12 and the pressure inside the heating device 12 is maintained at an appropriate level.

As mentioned above, although the cleaning machine of the present invention is a small and simple device that is almost the same as a conventional single-purpose cleaning machine, it can be used for both hot water and steam cleaning, and the mechanism is Because it is simple, breakdowns are rare and maintenance is easy.

Note that the above-mentioned valves 3, 10, 17, and 14 can be either electromagnetic valves or manual valves, but it is better to use all electromagnetic valves and operate them by operating a single switch, since there will be no operational errors. This is preferable because it is also easy to operate.

[Brief explanation of drawings]

The drawing is a system diagram for explaining the operation of the washing machine of the present invention. 1... Water valve, 2... Cold water hose, 3... Three-way switching valve, 4... Water supply pipe, 5... Float tank , 6... Filter, 7... Suction pipe, 8... Pump, 9... Pressure feed pipe, 10... Three-way switching valve, 11... Pressure feed pipe, 12... Heating device, 13... Flow rate adjustment valve, 14...
... Opening/closing valve, 15... Return pipe, 16...
...Delivery pipe, 17...Three-way switching valve, 1
8...Steam pipe, 19...Steam hose,
20...Steam gun, 21...Burner,
22... Automatic pressure regulating valve, 23... Pressure gauge,
24... Water supply pipe, 25... Water supply pipe, 2
6...Hot water pipe, 27...Hot water hose,
28... Hot water gun, 29... Thermostat, 30... Pressure gauge.

Claims (1)

[Claims] 1 The cold water stored in the float tank 5 via the first three-way switching valve 3 is transferred to the second three-way switching valve 1 with the pump 8.
0 to the heating device 12, a part of the cold water is returned to the float tank 5 through the flow control valve 13 and the on/off valve 14, and the wet steam heated and vaporized in the heating device 12 is transferred to the third three-way The injection is made from the steam gun 20 via the switching valve 17, and the three three-way switching valves 3, 10, 17 are switched, and the opening/closing valve 1 is
4 is closed, cold water is supplied to the heating device 12 via the first three-way switching valve 3 and heated, and then the third three-way switching valve 17 is closed.
A steam and hot water washing machine for automobiles, characterized in that hot water stored in a float tank 5 is injected from a hot water gun 28 via a second three-way switching valve 10 by a pump 8.