JPS6136206Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a vacuum cleaner that forms a reduced-pressure dust suction space above a floor surface and sucks dust on the floor surface together with air.

When cleaning with such an air suction type vacuum cleaner, relatively large pieces of paper or vinyl that have fallen on the floor may get sucked into the air suction port and become stuck, or the curtains may be closed. During cleaning, it often happens that the curtain fabric is similarly attracted to the suction port and the suction port cannot be moved smoothly.

If such an inconvenient situation occurs, manually turn off the power to the vacuum cleaner to release the paper from adhering to vinyl pieces or curtains, and then turn the power back on manually to start cleaning again. However, there is a technology that can eliminate this trouble to some extent.
Conventionally, the following are known.

In other words, a pressure sensor is installed in the dust suction space inside the suction port body, and when this sensor detects a negative pressure below a certain value (meaning that paper etc. is attracted to the suction port), is configured so that the power to the vacuum cleaner is automatically turned off.

However, with such a conventional structure, although the manual operation required is reduced when paper or the like is attracted, the original function of cleaning by air suction is also interrupted because the power is automatically cut off. It has the disadvantage of being unsuitable for suctioning dust on paper surfaces, cleaning curtains, etc.

The present invention was developed in view of the above circumstances, and its purpose is to prevent paper, vinyl, curtain fabric, etc. from adsorbing to the suction port during cleaning.
It is an object of the present invention to make it possible to release such a state automatically and without interrupting the cleaning function.

In order to achieve the above object, the vacuum cleaner according to the present invention has a suction port attached to the tip of an intake pipe communicating with the vacuum cleaner body to form a dust suction space above the floor surface. A nozzle for injecting pressurized air toward the surface is provided, and a pressure sensor is provided in the dust suction space or a space communicating therewith to detect when the pressure in the dust suction space has decreased below a certain value. The present invention is characterized in that a blower for the injection nozzle is automatically operated based on the detection result.

According to this characteristic structure, instead of using a passive means of releasing the suction of paper etc. by stopping the air suction action originally necessary for cleaning, as in the past, While the air suction effect of the vacuum cleaner continues as it is, it also uses an active method of automatically ejecting pressurized air, so the original cleaning function is not interrupted at all and the suction state of paper etc. is maintained. can be automatically and effectively released, and therefore, even for objects that are prone to adsorption phenomena such as curtains,
Additionally, dust scattered on the paper surface can now be cleaned smoothly and reliably.

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

The vacuum cleaner can be a floor type or a handy type, or the main suction tube drawn from the vacuum cleaner body fixedly installed at an appropriate location is piped into the wall or under the floor of each room, and the vacuum cleaner is installed separately in each room. There is a so-called central type device that is used by connecting a dust suction terminal unit consisting of a flexible suction pipe and a suction port body attached to the tip of the flexible suction pipe to a provided connection port. The present invention will be described here by taking a floor-type vacuum cleaner as an example, although it can also be implemented in other types of vacuum cleaners.

In Fig. 1, numeral 1 denotes a vacuum cleaner body which can be moved in any direction by means of pivotally fixed wheels 2 and caster wheels 3, and has a known structure for dust collection mainly using suction means such as filters and suction pumps. It has a built-in device.

Reference numeral 4 denotes a flexible cylinder equipped with an operation switch 5 on the tip side, and the electric circuit built in the cylinder 4 and the vacuum cleaner main body 1 are connected to the suction port of the vacuum cleaner main body 1.
The electric circuit on the side is also connected, so that the dust collection and stop of dust collection of the dust collector of the vacuum cleaner main body 1 can be remotely controlled at hand.

Reference numeral 6 denotes a telescopic suction cylinder which also serves as a handle, and the suction cylinder 6 and the cylinder 4 constitute the above-mentioned intake pipe. Reference numeral 7 denotes a suction port body detachably attached to the tip of the suction cylinder 6.

As shown in FIG. 2, the suction port main body 7 has a suitably high height with an open bottom surface between the suction port a communicating with the dust collector and the floor surface F to be cleaned such as a tatami mat or carpet. The dust suction space S is formed in the suction port main body 7.
Nozzle 8 for injecting pressurized air onto the floor surface F inside
is provided. The air jet direction by the nozzle 8 is
It is desirable to direct the opening toward the periphery of the suction port body 7 as much as possible to make it easier to separate the bottom opening (suction port) of the suction port body 7 from paper, vinyl, etc. that has been adsorbed there. In the embodiment, the nozzle 8 is continuous (or intermittent) along the periphery of the space S.
It is formed into a slit shape. Further, a blower 11 consisting of a motor 9 and a fan 10 is attached to the upper part of the suction port main body 7, and is configured to suck external air from the suction port 12, pressurize it, and supply it to the nozzle 8. . Reference numeral 13 denotes a power cord for the blower 11, and a connecting portion 14 between the flexible tube 4 and the suction tube 6 described above is provided with an outlet 16 that corresponds to a plug 15 attached to the tip of the cord 13. Further, a normally open switch 17 is provided in the middle of the cord 13.

A pressure sensor 18 is provided in the dust suction space S of the suction port body 7, and detects when the pressure in the space S has decreased below a certain value.
The air blower 11 is operated by automatically turning on and off the switch 17 based on the detection result of the pressure sensor 18.

Therefore, during cleaning, materials with poor ventilation such as curtains, paper, or vinyl may be exposed to the suction port body 7.
If it gets stuck to the suction port and won't let go,
When the pressure in the dust suction space S becomes a negative pressure below a certain value, the pressure sensor 18 detects this and automatically operates the blower 11, so that pressurized air is injected from the nozzle 8. This makes it possible to forcibly remove the suction object such as the curtain or paper from the suction port main body 7 without stopping the original suction action, while continuing to move the suction port main body 7. Cleaning can be done without any trouble.

Note that the blower 11 is attached to the vacuum cleaner main body 1 side, and the vacuum cleaner main body 1 and the suction port main body 7 are connected by two pipes or two.
It is also possible to configure and implement a structure in which they are connected for communication using heavy pipes. Further, the pressure sensor 18 may be installed in a space communicating with the dust suction space S, that is, in a dust suction flow path downstream of the dust suction space S. Further, it is desirable to prevent excess air from flowing into the dust suction space S through the blower 11 during normal dust suction operation when the blower 11 is stopped. This problem can be solved simply by appropriately selecting the type and structure of the blower 11.
An electromagnetic on-off valve may be provided in the air flow path from 9 to the nozzle 8, and the valve may be opened and closed in conjunction with the start and stop of the blower 11.

[Brief explanation of the drawing]

The drawings illustrate an embodiment of the vacuum cleaner according to the present invention, and FIG. 1 is an overall view with main parts cut away, and FIG. 2 is a longitudinal sectional front view of the main parts. 1...Vacuum cleaner body, 7...Suction port body, 8...
Nozzle, 11...Blower, 18...Pressure sensor, S...Dust suction space.

Claims (1)

[Claims for Utility Model Registration] Pressurized air is ejected toward the floor within the space in the suction port, which is attached to the tip of the intake pipe communicating with the vacuum cleaner body and forms a dust suction space above the floor. A pressure sensor is provided in the dust suction space or a space communicating therewith for detecting that the pressure in the dust suction space has decreased below a certain value, and based on the detection result of the pressure sensor, the A vacuum cleaner characterized in that a blower for a spray nozzle is configured to automatically operate. The vacuum cleaner according to claim 1, wherein the blower is attached to the suction port body. The vacuum cleaner according to claim 1 or 2, wherein the injection nozzle is provided along the periphery of the dust suction space.