JPH0484918A - Vacuum cleaner - Google Patents

Abstract

PURPOSE:To prevent the motor-driven air blower from executing an over speed operation by constituting this cleaner so that when a large quantity of water is sucked, a float ascends and moves, and magnet of the float concerned approaches a protective switch and operates the protective switch. CONSTITUTION:When a liquid such as a large quantity of water, etc., is sucked, a float 38 ascends and moves, and a communicating port 36 is closed up. In this case, a magnet provided on the float 38 approaches a protective switch 43, the protective switch 43 is operated thereby and switched from a turn-on state to a turn-off state, a photo-triac 46 is turned off, feed to a motor-driven air blower 9 is stopped, and the motor-driven air blower 9 stops. When the motor-driven air blower 9 stops, a float 41 is lowered, thereby the protective switch 43 becomes a turn-on state but since the photo-triac 46 does not operate, the motor-driven air blower 9 does not rotate. In such a manner, when a large quantity of water is sucked, the float 41 is ascended and moved, the communicating port 36 is closed up, it is prevented that water is sucked into the motor- driven air blower 9, it is prevented that the motor-driven air blower 9 becomes an insulation failure, and also, the generation of rust is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a vacuum cleaner that collects dust using water stored in a water tank.

(b) Prior art As a technology prior to the present invention, for example, Utility Model Application No. 61-61
No. 948 and Japanese Utility Model Application Publication No. 61-79624 disclose a vacuum cleaner that can also suck in water and separates dust by blowing suction air containing dust onto water in a water tank. There is. However, if a large amount of water accumulates in the water tank in these vacuum cleaners, there is a risk that the water will be sucked into the electric blower, causing poor insulation or rusting of the electric blower. For example, JP-A-59-
As shown in Japanese Patent No. 192324, a vacuum cleaner that can also suck water is known to have a float to prevent the water from being sucked into the electric blower when a large amount of water is sucked in. When the float operates and blocks the suction port of the electric blower, the electric blower becomes overspeeded and rotates at high speed, which has disadvantages that adversely affect the electric blower, such as consumption of the power supply brush and insulation deterioration due to temperature rise. .

(C) Problems to be Solved by the Invention The present invention has been made to solve the above-mentioned drawbacks. The object of the present invention is to provide a vacuum cleaner that does not adversely affect an electric blower and prevents it from breaking down over a long period of time.

(d) Means for Solving the Problems In order to solve the above problems, the vacuum cleaner of the present invention houses an electric blower in the upper case of the main body and communicates with the electric blower in the lower case of the main body. A water tank equipped with a communication port and a suction port is removably housed, and suction air containing dust is blown onto the water stored in the water tank to separate dust, and a magnet is installed in the water tank. An attached float is provided to be movable up and down, and a protection switch is provided at a position facing the float on the bottom plate of the upper case of the main body, which is activated by proximity of the magnet, and when the protection switch is activated, power supply to the electric blower is stopped. It is characterized by the fact that

(e) Effect With the above configuration, when the electric blower is operated, the suction air containing dust and water enters the water tank and is blown against the water stored in the water tank, and the dust is sucked in by contact with the water. Separated from air and collected in water. Water is also stored in a water tank. When a large amount of water is sucked in, the float moves upward, and when the magnet of the float comes close to the protection switch, the protection switch is activated, thereby stopping power supply to the electric blower and stopping the electric blower.

(to) Example of implementation Hereinafter, the vacuum cleaner of the present invention will be explained based on the drawings.

Reference numeral 1 denotes a vacuum cleaner main body case of a vacuum cleaner, in which a removable main body upper case 2 and a main body lower case 3 are fixed with a clamp 4 and integrated. The main body upper case 2 has a double-walled structure of an outer case 5 and an inner case 6, and is provided with an upper cover 7 that is movable up and down at the upper part, and a bottom plate 8 which serves as a partition wall from the lower case 3 at the lower part. There is.

Reference numeral 9 denotes an electric blower equipped with a cooling fan 1O at the rear; 11 an air guide tube that covers the electric blower $9; The fan cover tube 13 is provided with an intake port 14 in the center thereof which communicates with the intake side of the fan section 9b. The electric blower 9 is elastically held by first and second annular packings 15 and 16 that airtightly seal the intake side and the exhaust side of the fan section 9b, and the fan section 9b and the motor section 9a, respectively. The air guide tube 11 is housed in the inner case 6 with the air intake port 14 facing downward from the bottom opening 17 of the bottom plate 8, with its lower part reinforced by an air guide support annular packing 18. be done. Further, the motor section 9 of the electric blower 9
The rear portion a is supported by the upper bottom surface of the outer case 5 via a motor support tube 19 that accommodates the cooling fan 10 and a motor support gasket 20.

At the top of the upper bottom surface of the outer case 5 is the motor support tube 1.
9, forming a cooling air flow population 21 that communicates with air flow 9.

Reference numeral 22 denotes a power cord winding part formed in an annular shape on the upper part of the upper cover 5, which is covered with the above-described vertically movable upper cover 5, and is used to wind and store the power cord 23.

Furthermore, 24 and 25 are an exhaust port and a cooling air exhaust port respectively provided in the outer case 5, and 26 is an integral particulate filter, and the suction air coming out from the exhaust side of the fan section 9b of the electric blower 9 is connected to the fan cover tube. The air enters between the air guide cylinder 11 and the inner case 6 through the exhaust port 27 of 13, passes through the fine dust filter unit 26, and is discharged through the exhaust port 24.

On the other hand, the cooling air from the motor part 9a of the electric blower 9 reaches the motor part 9b from the gap 28 of the power cord wrapping part 22 through the cooling air flow 21, cools the motor part 9b, and then the air flows from the motor part 9b. The air passes through the inside of the guide tube 11, passes through the cooling air passage port 29 of the inner case 6, and is further discharged from the cooling air exhaust port 25.

30 is a suction hose connection tube, and a lower end opening 31 is formed in the bottom plate 8.

Reference numeral 32 denotes a cylindrical water tank that is removably housed in the lower case 3 of the main body, and includes a cylindrical lower container 34 with an opening at the top for storing water 33 as a dust collection filter, and a cylindrical lower container 34 which covers this upper opening and is removable. It consists of an upper lid 35 that is attached to the. The air intake port 14 is located in the center of the upper lid 35.
A communication port 36 is formed in the side portion to communicate with the lower end opening 31 in an airtight manner, and a suction port portion 37 is formed in the side portion to communicate with the lower end opening 31. The suction port 37 has a lateral outlet 37a that opens laterally in the circumferential direction of the water tank 32.

Reference numeral 38 denotes a cylindrical filter attached to the upper lid 35 so as to cover the communication port 36 and disposed within the water tank 32, which separates the suction air from dust and water 33 between the filter support frame 39. A filter membrane 40 is provided.

41 is a float disposed inside the cylindrical filter 38 so as to be movable up and down, and the float 41 is connected to the water tank 3.
When liquid such as water is sucked into the container 2, it moves upward and closes the communication port 36.

42 is a magnet attached to the upper part of the float 41.

43 is a protection switch consisting of a proximity switch such as a reed switch attached to the bottom plate 8 of the main body upper case 5 at a position opposite to the float 38;
is activated by the proximity of the magnet 42 and switches from an on state to an off state.

Moreover, FIG. 4 is a schematic electrical circuit diagram of the vacuum cleaner of the present invention,
In the figure, 9 is the electric blower, 42 is the magnet,
43 is the protection switch, 44 is a microcomputer processing device, 45 is a main body switch, and 46 is a phototriac.

Then, connect the suction hose (not shown) @3
0 and presses the main body switch 45, the phototriac 46 is activated, the electric blower 9 is driven, and suction air containing dust and water is sucked into the water tank 32. At this time, since the lateral outlet 37a of the suction port 37 opens laterally in the circumferential direction of the water tank 32, the suction air flows in a vortex and is blown onto the water 33, thereby causing the water 33 to also rotate in a vortex. At the same time, dust is separated from the suction air by contact with the water 33, and the dust is collected and stored in the water 33. The suction air from which dust has been separated passes through the cylindrical filter 38, is sucked into the electric blower 9 through the communication port 36 and the intake port 14, and is then discharged from the exhaust port 24. Further, water is stored in the water tank 32.

When a large amount of liquid such as water is sucked in, the float 38 moves upward and closes the communication port 36. At this time, float 38
The magnet 42 attached to the magnet 42 comes close to the protection switch 43, and the protection switch 43 is actuated and switched from the on state to the off state, the phototriac 46 is turned off, the power supply to the electric blower 9 is stopped, and the electric blower 9 is turned off. Stop.

When the electric blower 9 stops, the float 41 descends, thereby turning on the protection switch 43, but the electric blower 9 does not rotate because the 7 auto-try-attack 46 does not work.

When restarting the operation, the electric blower 9 is operated again by pressing the main body switch 45.

As a result, when a large amount of water is sucked in, the float 41
moves upward and blocks the communication port 36, causing water to flow into the electric blower 9.
This prevents the electric blower 9 from being sucked into the air, thereby preventing poor insulation of the electric blower 9, and also preventing the occurrence of rust. Furthermore, at this time, the electric blower 9 is stopped from being supplied with power and stops rotating.
Since there is no overspeed operation for a long period of time, the power supply brush is not wasted, there is no insulation deterioration due to temperature rise, and the electric blower 9 is not adversely affected.

Furthermore, when the float 41 operates and stops the rotation of the electric blower 9, the main body switch 45 must be suppressed again, so the cause of the rotation stop can be investigated, and
This prevents the electric blower 9 from being turned on and off repeatedly due to the vertical movement of the float 41.

(G) Effects of the Invention Since the present invention is constructed as described above, when a large amount of water is sucked in, the float closes the communication port and the water is not sucked into the electric blower. The magnet is close to the protection switch and activates the protection switch, which causes the electric blower to stop rotating, so it will not run at overspeed, and this will not affect the electric blower and will not break down over a long period of time. You can get a vacuum cleaner that can also suck up water.

[Brief explanation of drawings]

The drawings all relate to embodiments of the vacuum cleaner of the present invention, and FIG. 1 is a vertical front view, FIG. 2 is a vertical right side view of the main part, FIG. 3 is a perspective view, and FIG. 4 is a schematic electrical circuit diagram. be. 2... Main body upper case, 3... Main body lower case, 9...
- Electric blower, 32... Water tank, 36... Communication port, 41... Float, 42... Magnet, 43... Protection switch.

Claims (1)

[Claims] (1) In addition to storing the electric blower inside the upper case of the main unit,
A water tank having a communication port and a suction port communicating with the electric blower is removably housed in the lower case of the main body, and dust is separated by blowing suction air containing dust onto the water stored in the water tank. A float equipped with a magnet is provided in the water tank so as to be movable up and down, and a protection switch is provided at a position opposite to the float on the bottom plate of the upper case of the main body, which is activated by the proximity of the magnet, and the protection A vacuum cleaner characterized in that power supply to the electric blower is stopped by actuation of a switch.