JPH0131153Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of an automatic cleaning device for cleaning the exterior of a building.

First, a conventional automatic cleaning device will be explained with reference to FIGS. 1 and 2.

In the figure, 1 consists of a flexible rubber plate 2, a side seal 3 that seals both ends, a nozzle 4 that spouts cleaning liquid supplied from a cleaning liquid tank, etc., forming a box-shaped space and applying it to the surface to be cleaned. This is a well-known cleaning head that moves close to the cleaning surface and cleans the cleaning surface. Reference numeral 5 denotes a water receiver for temporarily storing cleaning water that remains and leaks into the cleaning head 1 without being collected. The cleaning head 1 is pressed against the cleaning surface by a back-and-forth moving mechanism (not shown), and in this state, the cleaning water stored in the cleaning liquid tank 6 passes through the filter 7, pump 8, switching valve 9, and throttle valve 10. The cleaning head 1 descends while being sprayed onto the surface to be cleaned from the nozzle 4 to perform cleaning. During this cleaning operation, the inside of the cleaning liquid tank 6 and the inside of the cleaning head 1 connected by piping are brought to negative pressure by the vacuum blower 11. The cleaning liquid spouted into the cleaning head 1 and dirty water mixed with dirt removed by cleaning are collected into the cleaning liquid tank 6. In addition, cleaning head 1 that could not be collected
The dirty water leaks from the gap between the rubber plate 2 and the side seal 3, collects in the water receiver 5 provided at the end, and is collected in the cleaning liquid tank 6 by the vacuum blower 11 or by gravity, just like in the cleaning head 1. be done. However, when the dirty water in the water receiver 5 disappears, the water receiver 5
Atmospheric air enters from the piping of the cleaning liquid tank 6,
The degree of vacuum in the cleaning liquid tank 6 was lowered, making it difficult to collect dirty water in the cleaning head 1, which could impair the cleaning effect.

This invention solves the above-mentioned drawbacks and aims to provide an automatic cleaning device that does not dissipate waste water and provides a good cleaning effect.

An embodiment of this invention will be explained below with reference to FIG. In the figure, the same reference numerals as in FIGS. 1 and 2 indicate the same parts, 12 is a pipe connecting each water receiver 5 and the washing water tank 6, and 13 is a pipe corresponding to each water receiver 5. This is a solenoid valve arranged in the conduit 12.

That is, while the cleaning head 1 is cleaning the surface to be cleaned, the solenoid valve 13 is closed to prevent air from flowing in from the water receiver 5, increasing the negative pressure inside the cleaning head 1 and improving the collection of waste water. A good cleaning effect can be obtained. After cleaning is completed, the cleaning head 1 is pressed against the surface to be cleaned, the jetting of the cleaning liquid is stopped, the electromagnetic valve 13 is opened, and the dirty water in the water receiver 5 is collected into the cleaning liquid tank 6 by the vacuum blower 11. Therefore, dripping of dirty water due to vibration of the cleaning head 1 etc. can be prevented. This eliminates problems caused by the dissipation of waste water and provides a good cleaning effect. In addition, only one of the two solenoid valves 13 is opened to collect the waste water from the corresponding one of the water receivers 5,
Thereafter, by closing this electromagnetic valve 13 and opening the other electromagnetic valve 13 to recover the wastewater from the other water receiver 5, the wastewater can be recovered more completely.

As explained above, this invention provides a solenoid valve between the water receiver and the cleaning liquid tank, closes the solenoid valve during the cleaning operation of the cleaning head, increases the negative pressure inside the cleaning head, and obtains a good cleaning effect. After the cleaning operation, the solenoid valve is opened, and the dirty water leaking from the cleaning head and collected in the water receiver is collected into the cleaning liquid tank. This eliminates troubles caused by the dissipation of waste water, and provides an automatic cleaning device that provides a good cleaning effect.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the main parts of a cleaning head showing a conventional automatic cleaning device, Fig. 2 is a cleaning liquid circuit diagram shown in Fig. 1, and Fig. 3 is a cleaning liquid circuit diagram showing an embodiment of the automatic cleaning device according to this invention. be. DESCRIPTION OF SYMBOLS 1...Cleaning head, 5...Water receiver, 6...Cleaning liquid tank, 12...Pipe line, 13...Solenoid valve In addition, the same parts or equivalent parts in the drawings are indicated by the same reference numerals.

Claims (1)

[Scope of utility model registration request] A cleaning head that moves in contact with the surface to be cleaned and performs a cleaning operation by supplying the cleaning liquid supplied from the cleaning liquid tank to the cleaning surface, and a cleaning head that sucks the cleaning liquid in the cleaning head after cleaning and transfers it to the cleaning liquid tank. A vacuum blower is provided at the bottom of the cleaning head to collect the cleaning liquid leaking from the cleaning head, and the collected cleaning liquid is transferred to the cleaning liquid tank via a pipe line connected to the cleaning liquid tank. In an automatic cleaning device having a water receptacle that is open to the atmosphere for collection, the water receptacle is installed in the pipe line interposed between the water receptacle and the cleaning liquid tank, and the pipe is connected during the cleaning operation of the cleaning head. An automatic cleaning device characterized by comprising a solenoid valve that closes the conduit and operates to open the conduit after the cleaning operation.