JPH10262874A - Vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To implement a highly reliable operation without worrying about obstructing the vent of a safety valve by a dust collecting bag, by providing an airway downward of the bottom plane of a dust collecting chamber of a vacuum cleaner, installing a safety valve in the airway with an air introduction aperture facing to the outside air and closing a part of the opening of the airway. SOLUTION: When a power source is turned on, an electric ventilator 12 is driven, the inside of a dust collecting chamber 3 forms a vacuum, and the dust on the floor, etc., is sucked from a suction inlet 8 and collected within a dust collecting bag 9. When a suction amount from the suction inlet 8 is lowered to a specified value, the air introduction inlet of a safety valve 25 is released, the outside air from a pipe holder insertion aperture 14 is introduced inside the dust collecting chamber 3 by way of the safety valve 25, a safety valve exhaust chamber 24, a vent 21 and an electric air blowing chamber 17, and the electric ventilator 12 is protected by lowering the extent of vacuum insider the dust collecting chamber 3. In this instance, because of utilization of a pipe holder insertion groove 13 installed downward of the dust collecting chamber 3 and installation of a safety valve chamber 20 by partitioning with the dust collecting chamber 3 and the bottom plate 16, the electric ventilator 12 can be protected through constantly reliable operation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum cleaner, and more particularly, to a safety valve for the vacuum cleaner.

[0002]

2. Description of the Related Art FIG. 10 is a side view of an example of a conventional vacuum cleaner with a partial cross section, and FIG. 11 is an enlarged view of a main part thereof. In the drawing, reference numeral 1 denotes a cleaner main body, and 2 denotes an upper cover provided on an upper front portion of the cleaner main body 1. The upper cover 2 is provided with a safety valve chamber 4 which projects into the dust collection chamber 3 and communicates with the outside air. A safety valve 6 is attached to the opening 5 provided at the bottom of the chamber 4 on the dust collection chamber 3 side.

As shown in FIG. 11, for example, as shown in FIG. 11, a valve 6c and a spring 6d are accommodated in a bottomed cylindrical safety valve frame 6a having a plurality of vents 6b, and an upper opening of the safety valve frame 6a is provided. Has an air inlet 6
A valve lid 6e having f is attached. And
When the air pressure (outside air) in the safety valve chamber 4 and the air pressure in the dust collection chamber 4 have a fixed relationship, the valve 6c is urged upward by the spring 6d to close the air introduction port 6f, and the dust collection chamber is closed. 4
When the internal air pressure decreases, the valve 6c descends to open the air introduction port 6f, and the air (outside air) in the safety valve chamber 4 is introduced into the dust collection chamber 4 through the ventilation port 6b.

[0004] 7 is a case, 8 is a suction port for inserting a pipe holder with a brush connected to the front end provided on the front surface, 9 is a dust collecting bag detachably mounted in the dust collecting chamber 3, and 10 is a cleaning bag Rear wheels 11 provided on both sides of the machine body 1 are front wheels provided on the lower surface of the front part. Although not shown, an electric blower is built in a rear portion of the cleaner body 1 and an exhaust port is provided on a rear surface.

In the above-described vacuum cleaner, a hose of a suction tool having a brush connected to a tip end is connected to a suction port 8.
, Turn on the power and clean the floor with brushes. As a result, the interior of the dust collection chamber 3 is evacuated, and dust on the floor or the like is sucked from the brush and sent into the dust collection bag 9. When the dust gradually accumulates in the dust collecting bag 9 and the amount of air flowing into the electric blower decreases, the number of rotations of the electric blower and the degree of vacuum in the dust collection chamber 3 increase. Failures such as sticking may occur.

In order to prevent this, when the degree of vacuum in the dust collecting chamber 3 rises and the pressure drops, the valve 6c of the safety valve 6 opens, and outside air is introduced into the dust collecting chamber 3 to lower the degree of vacuum. The load on the electric blower is reduced to protect it.

[0007]

In the above-described conventional vacuum cleaner, since the safety valve 6 protrudes into the dust collecting chamber 3, the dust collecting bag 9 is connected to the safety valve 6 as shown in FIG. Even if the ventilation port 6b is blocked and the degree of vacuum in the dust collection chamber 3 increases, the valve 6c does not operate, and outside air may not be introduced into the dust collection chamber 3.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and there is no danger that the dust collection bag will block the ventilation opening of the safety valve, and the safety valve can always operate normally to protect the electric blower. The purpose is to obtain a highly reliable vacuum cleaner.

[0009]

[Means for Solving the Problems]

(1) In the vacuum cleaner according to the present invention, a ventilation path is provided below the dust collection chamber of the vacuum cleaner body to communicate with the outside air and the electric blower chamber.
A safety valve is installed in this ventilation path.

(2) In the vacuum cleaner of (1),
An opening is provided on the lower surface below the bottom plate of the dust collection chamber, a ventilation path is provided to communicate with the outside air and the electric blower room, and a safety valve is installed in the ventilation path with the air introduction port facing the outside air, and the opening of the ventilation path is provided. Was partially closed.

(3) Further, the vacuum cleaner according to the present invention comprises:
An opening is provided on the lower surface below the bottom plate of the dust collection chamber, an air passage is provided to communicate with the outside air, and a through hole is provided in the bottom plate for communicating the air passage and the dust collection chamber. The protective frame having the ventilation hole was mounted so as to protrude from the ventilation path into the dust collection chamber, a safety valve was installed in the protection frame with the air introduction port facing downward, and a part of the opening of the ventilation path was closed.

(4) The air passage of the vacuum cleaner according to the above (1), (2) or (3) is constituted by using an insertion port of a pipe holder mounted on a suction tool.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. 1 is a side view of a vacuum cleaner according to Embodiment 1 of the present invention, a part of which is shown in cross section, FIG. 2 is a bottom view of a front side thereof, and FIG.
FIG. 2 is an enlarged view of a main part of FIG. 1. In addition, the same parts as those of the conventional vacuum cleaner described with reference to FIG.
Description is omitted.

Reference numeral 13 denotes an arc-shaped pipe holder insertion groove provided on the lower surface on the front side of the lower case 7 of the cleaner body 1 and having an open lower surface. Reference numeral 20 is provided in communication with the pipe holder insertion groove 13, and is separated from the dust collecting chamber 3 by the bottom plate 16,
A safety valve chamber having an opening 22 on the lower surface and forming a ventilation path,
A vent 21 is provided on the rear side of the electric blower 12.
Are communicated with the electric blower room 17 in which is accommodated. In the safety valve chamber 20, the air inlet 30 is directed from the opening 22 on the lower surface toward the pipe holder insertion groove 13 side, and the safety valve 25 is
Is inserted, and the opening 22 is connected to the pipe holder support 2.
By closing with 3, the pipe holder insertion port 14 is formed on the pipe holder insertion groove 13 side of the safety valve 25, and the safety valve exhaust chamber 24 is formed on the ventilation port 21 side.

FIG. 3 shows an example of the safety valve 25. Reference numeral 26 denotes a bottomed cylindrical safety valve frame having a plurality of ventilation holes 27, and a spring seat 28 is provided at the center of the bottom. 29
Is a lid having an air inlet 30 in the center, 31 is a valve for opening and closing the air inlet 30, and 32 is a coil spring interposed between the spring seat 28 and the valve 31. The coil spring 32 normally urges the valve 31 toward the lid 29 to close the air inlet 30, and the amount of air sucked from the inlet 8 is a predetermined amount (for example, 0.7 m).
^When the pressure falls to around ³ / min), the pressure in the dust collection chamber 3 and hence the pressure in the air exhaust chamber 24 decreases, so that the valve 31 is retracted by outside air and the air inlet 30 is opened. .

In the vacuum cleaner constructed as described above, one end of a hose 35 (see FIG. 5) to which a brush 37 and a pipe 36 constituting a suction tool are connected is connected to the cleaner main body 1.
And the power supply is turned on. As a result, the electric blower 12 is driven to make the interior of the dust collecting chamber 3 vacuum,
Dust on the floor or the like is sucked from the brush 37 and collected in the dust collection bag 9. When the dust gradually accumulates in the dust bag 9, the amount of air sucked by the electric blower 12 decreases, so that the electric blower 1
2 and the degree of vacuum in the dust collection chamber 3 increase.

Then, the suction air volume from the suction port 8 is
For example, when the pressure drops to about 0.7 m ³ / min, the air inlet 30 of the safety valve 25 is opened, and the outside air from the pipe holder insertion port 14 is discharged to the air inlet 30, the vent 27 of the safety valve 25, and the safety valve exhaust chamber. The air blower 12 is introduced into the dust collecting chamber 3 through the ventilation port 21 and the electric blower chamber 17, and the degree of vacuum in the dust collecting chamber 3 is reduced to protect the electric blower 12. When the cleaning is completed, the cleaner body 1 is turned over, and a substantially L-shaped pipe holder 38 attached to the pipe 36 is inserted into the pipe holder insertion port 14 as shown in FIG. Store in state.

In this embodiment constructed as described above, the pipe holder insertion groove 13 provided below the dust collection chamber 3 is provided.
And the safety valve chamber 20 is provided by being divided by the dust collection chamber 3 and the bottom plate 16, so that the ventilation port 27 of the safety valve 25 does not have to be blocked by the dust collection bag 9 and always operates reliably. The electric blower 12 can be protected. When the cleaner body 1 is stored upside down, the pipe holder insertion port 14
Is closed by the pipe holder 38 so that the safety valve chamber 2
No dust or the like intrudes into the valve 0, and the safety valve 25 always operates normally during use.

Second Embodiment FIG. 6 is a side view of a second embodiment of the present invention, partly in section, and FIG. 7 is an enlarged view of a main part thereof. The same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. Reference numeral 40 denotes a protection frame for the safety valve 25, which has a flange 42 at a lower portion as shown in FIG.
A main body 41 having a substantially cylindrical shape provided with the main body 3;
And a plurality of ribs 44 provided on the peripheral wall between the ventilation holes 43. The partition 16 is provided with a through hole 16a into which the main body 41 of the protection frame 40 can be fitted.
A plurality of slits 16b are provided corresponding to the ribs 44.

In the present embodiment as described above, in order to mount the safety valve 25 on the lower surface of the cleaner main body 1, first, the protection frame 40 is attached to the opening 22 of the pipe holder insertion groove 13.
The ribs 44 are respectively inserted into the slits 16b provided in the partition 16 and pushed up. Thereby, the protection frame 40 is attached to the partition 16 in a state of protruding into the dust collection chamber 3. Next, the safety valve 25 is pressed into the main body 41 of the protection frame 40 from the opening 22 with the air inlet 30 facing downward, and is held at that position. Finally, the pipe holder support 23 is attached to the opening 22 and the opening 22 is closed. At this time, a ventilation path 20a is formed between the safety valve 25 and the pipe holder support.

The operation of the present embodiment configured as described above is almost the same as that of the first embodiment. When the degree of vacuum in the dust collection chamber 3 increases, the air inlet 30 of the safety valve 25 is opened. The outside air from the pipe holder insertion groove 13 is
a, the air blower 1 is introduced into the electric blower chamber 17 through the air inlet 30, the vent 27, and the vent hole 43, and the degree of vacuum is reduced.
Protect 2 When the cleaning is completed, the cleaner body 1 is turned over, and the pipe holder 38 is inserted into the pipe holder insertion port 14 and stored as shown in FIG.

In this embodiment, substantially the same effects as those of the first embodiment can be obtained. However, by installing the safety valve 25 with the air inlet 30 facing downward, the degree of adhesion between the valve 31 and the lid 29 can be improved. Is improved, and air leakage between the two is reduced, and loss of the suction force of the cleaner body 1 can be prevented. Also, if the pipe holder insertion port 1
Even if dust enters from the position 4, the dust does not accumulate on the safety valve 25, so that occurrence of operation failure can be prevented.

[0023]

【The invention's effect】

(1) In the vacuum cleaner according to the present invention, a ventilation path is provided below the dust collection chamber of the cleaner body to communicate with the outside air and the electric blower, and a safety valve is installed in the ventilation path. There is no danger that the bag will be closed by the bag, and it will always operate reliably to protect the electric blower, and a highly reliable vacuum cleaner can be obtained.

(2) In the vacuum cleaner of (1),
An opening is provided on the lower surface below the bottom plate of the dust collection chamber, a ventilation path is provided to communicate with the outside air and the electric blower room, and a safety valve is installed in the ventilation path with the air introduction port facing the outside air, and the opening of the ventilation path is provided. Is closed, the same effect as the above (1) can be obtained.

(3) In the vacuum cleaner according to the present invention, an air passage having an opening on the lower surface below the bottom plate of the dust collecting chamber of the cleaner body and communicating with the outside air is provided. A protection frame with a plurality of ventilation holes formed in the lower part of the through hole communicating with the dust chamber and having a plurality of ventilation holes in the peripheral wall is protruded from the ventilation path to the dust collection chamber, and a safety valve is installed in the protection frame with the air inlet opening downward. Since a part of the opening of the ventilation path is closed, the same effect as the above (1) can be obtained.

Also, since the safety valve is installed with the air inlet opening downward, the degree of sealing between the valve and the lid is improved, air leakage between the two is reduced, and loss of the suction force of the cleaner body is prevented. be able to. Also, even if dust enters from the outside air inlet during storage, it does not accumulate on the safety valve, so that the safety valve does not malfunction.

(4) In the vacuum cleaner of (1), (2) or (3), the ventilation path is formed by using the insertion hole of the pipe holder mounted on the suction tool, so that the structure is reduced. Not only is it simple, but when the vacuum cleaner body is inverted and stored, the pipe holder insertion port is closed by the pipe holder, so that dust etc. does not enter the ventilation path, and the safety valve during use is Always works properly.

[Brief description of the drawings]

FIG. 1 is a side view of a first embodiment of the present invention, a part of which is shown in cross section.

FIG. 2 is a bottom view of the front side of FIG.

FIG. 3 is an enlarged view of a main part of FIG. 1;

FIG. 4 is an enlarged view showing a state where a pipe holder is inserted into a pipe holder insertion port.

FIG. 5 is a perspective view showing a housed state of the electric vacuum cleaner according to the first embodiment.

FIG. 6 is a side view of the second embodiment partially shown in cross section.

FIG. 7 is an enlarged view of a main part of FIG. 6;

FIG. 8 is a perspective view of the protection frame of FIG. 7;

FIG. 9 is an enlarged view of a main part at the time of storage according to the second embodiment.

FIG. 10 is a side view of a conventional vacuum cleaner partially shown in section.

11 is an enlarged view of a main part of FIG.

[Explanation of symbols]

1 vacuum cleaner body, 3 dust collection chamber, 8 suction port, 9 dust collection bag, 12 electric blower, 13 pipe holder insertion groove, 1
4 Pipe holder insertion port, 16 bottom plate, 17 electric blower room, 20 safety valve room, 20a ventilation path, 21 ventilation port,
22 opening, 23 pipe holder support, 25 safety valve, 30 air inlet, 40 protection frame.

Claims (4)

[Claims] 1. A vacuum cleaner body having a dust collection chamber in which a dust bag is mounted and an electric blower chamber in which an electric blower is installed, a suction body provided in a front part and an exhaust port provided in a rear part, and the suction part A suction device that is detachably connected to the vacuum cleaner, wherein a ventilation path communicating with the outside air and the electric blower chamber is provided below the dust collection chamber of the cleaner body, and a safety valve is provided in the ventilation path. An electric vacuum cleaner characterized by the above. 2. A ventilation path having an opening on the lower surface below the bottom plate of the dust collection chamber and communicating with the outside air and the electric blower chamber is provided, and a safety valve is provided in the ventilation path with the air introduction port facing the outside air, The vacuum cleaner according to claim 1, wherein a part of an opening of the ventilation path is closed. 3. A cleaner body having a dust collecting chamber in which a dust collecting bag is mounted and an electric blower chamber in which an electric blower is installed, a cleaner main body provided with a suction port at a front portion and an exhaust port at a rear portion, and the suction port. A suction device which is detachably connected to the vacuum cleaner, wherein a ventilation path having an opening on the lower surface below the bottom plate of the dust collecting chamber of the cleaner body and communicating with the outside air is provided, and the bottom plate is ventilated. A protection frame having a through-hole communicating the path and the dust collection chamber and having a downward opening in the through-hole and having a plurality of ventilation holes in the peripheral wall is mounted so as to protrude from the ventilation path to the dust collection chamber, and the air introduction port is positioned downward. A safety valve is installed in the protection frame, and a part of an opening of the ventilation path is closed. 4. The vacuum cleaner according to claim 1, wherein the air passage is formed by using an insertion port of a pipe holder mounted on the suction tool.