JPH0628624B2 - Wet and dry type vacuum cleaner - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to an improvement of a wet-and-dry type vacuum cleaner capable of sucking water and dry dust together.

[Background of the Invention]

The conventional wet-and-dry type vacuum cleaners are roughly classified into the following two types.

The first is to selectively use wet and dry by attaching and detaching the filter.

That is, the filter is removed when it is wet and the filter is attached when it is dry.

The characteristic of this method is that it can satisfy both wet and dry performances, but on the other hand, the filter must be attached and removed each time wet and dry are used, which makes cleaning very cumbersome and difficult for customers. It was an opportunity.

The second type can be used for both wet and dry without replacing the filter, and its construction is shown in FIG.

That is, the main filter 41 is located inside the container 42, and the container 42 is covered by the outer container 43.

Then, there is an opening at the center of the bottom surface of the outer container 43, and the float 44 is located at the bottom.

Of the dust sucked into the tank B from the suction port on the right side of the drawing, relatively heavy dust such as sand particles and water collide with the vertically-arranged water blocking piece, and the water is stored at the bottom of the tank B.

In addition, fine dust and air are sucked in from the bottom hole of the outer container 43, pass through the space formed between the outer container 43 and the container 42 as shown by the arrow in the figure, and reach the upper opening of the container 42. The dust reaches the inside of the container 42 and is filtered by the main filter 41.

In the figure, 45 and 40 are coarse filters, which sequentially filter dust before reaching the main filter.

Further, the float 44 is in the mesh container 48, and the tank B
In response to the water level inside, the bottom hole of the outer container 43 is opened and closed.

Reference numeral 47 denotes a negative pressure sensing and warning device provided in the upper case A, which communicates with the inside of the main filter 41 by a pipe 46.

When the bottom hole of the outer container 43 is closed by the above-described float 44, the inside of the outer container 43 becomes a negative pressure by the action of the suction fan F. Therefore, the negative pressure is sensed through the pipe 46, and the tank B is sensed by a buzzer or the like. Notify that the inside is full.

As described above, according to the vacuum cleaner shown in FIG. 1, since the sucked water does not reach the main filter 41, it can be used for both wet and dry without replacement of the filter. It also has such drawbacks.

(1) The suction airflow that has entered the tank B passes through the bypass formed between the outer container 43 and the container 42, and
From the upper opening of the container to the inside of the container 42,
Since the air flow path is complicated, the flow path resistance increases and the suction force decreases, and the opening of the container 42 communicating with the main filter 41 is provided close to the suction fan F. The main filter 41 facing a part of the filter 41, that is, the opening of the container 42 having a fast suction airflow.
Partially, the dust locally adheres to it, causing immediate clogging,
The suction force on the suction hose side is reduced in a relatively short time, and as a result, there is the trouble of having to frequently replace the main filter 41 per unit time.

(2) Since the main filter 41 and the side of the water storage tank B are always in communication with each other, if the vacuum cleaner is stored in a state where water is stored in the tank B, the water evaporated especially in the tank B in the summer Shifts to the main filter 41 side to moisten the main filter 41, increase the ventilation resistance of the main filter when the cleaner is operated next time, and cause the problem described in (1) above.
That is, not only the problem that the suction force on the suction hose side is reduced in a relatively short time is further increased, but also a part of moisture enters the fan drive motor which is an electric device.

In addition, although it is not a wet-and-dry type vacuum cleaner, in JP-A-55-166135 entitled Water Absorption Vacuum Cleaner, the side surface of the dust collecting filter is made of fine mesh material, and the bottom surface is relatively It is made of coarse material, and the intake port of the dust collection box is provided on the side surface of the dust collection filter, so that the water that has passed through the dust collection filter and accumulated on the exhaust side of the filter is relatively visible. There is disclosed a technique of dropping the rough bottom surface of the container into the dust collecting box.

However, according to this configuration, dust from the intake port hits the side surface of the filter with fine meshes, so that the side surface of the fine meshes is immediately clogged, and this also causes the suction hose side of the suction hose side in a relatively short time. The suction force is reduced, and the problem caused by the reduction of the suction force on the suction hose side has already been described in the description of the vacuum cleaner shown in FIG.

[Object of the Invention]

An object of the present invention is to provide a vacuum cleaner that can be used for both wet and dry, as in the conventional example shown in FIG. PROBLEM TO BE SOLVED: To provide an improved wet-and-dry type vacuum cleaner capable of eliminating the trouble of frequently changing the dry dust collecting filter in, and extending the life of the fan driving motor. It is in.

[Outline of Invention]

The above-mentioned purpose is for the fan 4 (which is
For the reference numerals, refer to those shown in the drawings. The same applies hereinafter), and a tank 1 in which the upper case 1 is placed and fixed and which stores water and dust sucked by the suction airflow.
3, the upper part of an elastic rubber damper 39 is attached to the lower part 27 of the suction guide 25 provided in the tank 13, and the lower end of the rubber damper 39 is suspended to near the lower surface of the tank 13. In a wet and dry type vacuum cleaner, provided in the tank 13,
Maintains airtightness with the suction side of the fan 4 and has an opening 20 at the bottom.
A filter 16 is provided in the inner tank 14 having the above, and a float 23 that operates in response to a change in the water level in the tank 13 to open and close the opening 20 is provided below the opening 20. In addition to providing a net filter 36 which is coarser than the filter 16 around the float 23, the bottom opening 20 of the inner tank 14
This is achieved by opening the opening 20 on the filter 16 side by the suction air flow, and attaching a check valve 21 that closes the opening 20 in other cases.

Example of Invention

The present invention will be described based on the embodiment of FIGS. 2 and 3.

FIG. 2 is a vertical sectional view of a wet and dry type vacuum cleaner according to the present invention, and FIG. 3 is a perspective view showing a part of FIG. 2 in an exploded manner.

In FIG. 2, an electric blower 2 is built in an upper case 1, a cooling fan 3 is provided above the electric blower 2, and a main fan 4 for generating a suction airflow is provided below the electric blower 2.

The electric blower 2 is covered with a rubber motor cover 5.

A case cover 6 forming an air intake of the cooling fan 3 and a handle 7 are attached to the upper surface of the upper case 1.

The electric blower 2 uses the lower packing portion 8 of the motor cover 5, the tightening plate 9, and the screw 10 to exhaust the exhaust cover 11
The exhaust cover 11 is fixed to the motor support plate 1
It is fixed at 2.

An inner tank 14 having an opening 20 on the bottom surface is supported in the tank 13 via a packing 15, and the packing 15 keeps the motor support plate 12 and the tank 13 airtight.

A cloth filter 16 is provided in the inner tank 14, and the cloth filter 16 is attached to a packing 17 for keeping the inner tank 14 and the motor support plate 12 airtight. To maintain the shape of the.

The expander 19 prevents the cloth filter 16 from contracting due to the suction of the electric blower 2.

A check valve 21 made of rubber is formed in the opening 20 on the bottom surface of the inner tank 14 by opening the opening 20 toward the cloth filter 16 side by suction air flow, and otherwise closing the opening 20.
Is attached.

Further, a float cage 22 is screwed and fixed below the inner tank 14.

The opening 2 of the inner tank 14 at the center of the float cage 22
A recess for supporting the float 23 is formed at a position facing 0, and an opening 24 is provided on the bottom surface of the recess.

A net filter 36 is attached below the inner tank 14 so as to cover the float cage 22.

The suction guide 25 is attached to a position facing the suction port 26, and diverts water and dust sucked through a hose (not shown) downward.

39 is a rubber damper. That is, the tank 13
The upper part of the rubber damper 39 having elasticity is attached to the lower part of the suction guide 25 provided in the above, and the lower end of this rubber damper 39 is hung vertically to the vicinity of the lower surface of the tank 13. The water sucked into the water is transformed downward by the suction guide 25, but since the damper 39 is not made of a rigid body but made of elastic rubber, it effectively absorbs the impact due to the water flow collision and scatters water droplets. In addition to suppressing the above, the lower end of the rubber damper 39 is suspended up to near the lower surface of the tank 13, so that the rise of water on the bottom surface of the tank 13 is suppressed, and as a result, the water surface inside the tank 13 is not wavy. The kick can be effectively suppressed.

28 is a caster, 29 is a clamp, and the clamp 29 locks the upper case 1 and the tank 13.

Reference numeral 37 is a pipe that connects the space inside the cloth filter 16 and the negative pressure sensing and warning device 38.

The negative pressure sensing and warning device 38 opens a valve when the inside of the cloth filter 16 becomes a certain negative pressure or less and sends air into the cloth filter 16, and at the same time, a sound is generated by the air flow. This is because when the float 23 operates or when the cloth filter 16 is clogged, an air flow is supplied to prevent overheating due to idling of the main fan 4, and an alarm sound is emitted to operate the float 23 to the user. Notifies that the cloth filter 16 is clogged.

30 is a gap provided in the peripheral portion of the exhaust cover 11, 31
Is an exhaust port provided in the housing of the main fan 4, 32 is a motor housing, 33 is an opening of the motor housing 32, 34 is an opening of the motor cover 5, and 35 is a gap between the upper case 1 and the exhaust cover 11. Is.

FIG. 3 shows the cloth filter 16, the inner tank 14, the float cage 22, the float 23, and the net filter 3 described above.
6 is an exploded perspective view of FIG.

The operation of the wet and dry type vacuum cleaner shown in the above embodiment will be described.

When using this vacuum cleaner as a wet cleaner and sucking in water, the water handled from a separate suction port (not shown)
Suction port 26 through a hose not shown together with the air flow
Then, the suction guide 25 diverts the current downward and collects it at the bottom of the tank 15.

Then, the water surface in the tank 13 gradually rises, and finally the float 13 is pushed up, and the opening 20 on the bottom surface of the inner tank 14
Is closed to eliminate the negative pressure in the tank 13 and stop water absorption.

At this time, even if the water surface in the tank 13 becomes wavy due to the movement of the vacuum cleaner, the cloth filter 16 is removed by the inner tank 14.
Due to the fact that the check valve 21 is covered and the check valve 21 is present, no water droplets adhere to the cloth filter 16 and
The effect unique to the present invention due to the provision of will be described later.

Therefore, there is no obstacle due to a significant increase in ventilation resistance caused by the cloth filter 16 getting wet with water, and the dry dust collecting performance using the cloth filter 16 described later can be sufficiently ensured.

The operation when the vacuum cleaner is used as a dry cleaner will be described.

Among the dust sucked into the vacuum cleaner, relatively heavy dust such as sand particles is accumulated in the tank 13, and fine dust is carried into the inner tank 14 together with the air flow, and the cloth filter 1
It is filtered by 6 and stored in the inner tank 14. The check valve 21 prevents the fine dust from falling onto the float 23, and the effect unique to the present invention due to the provision of the check valve 21 has been described above. As described further below.

The net filter 36 filters coarse dust so that dust does not get caught around the float 23 and malfunction occurs.

In this way, even when both the water and the dry dust are sucked into one vacuum cleaner, the cloth filter 16 does not get wet, so that the dust collecting property is good, and the net filter 36 is provided around the float 23. The net filter 36 prevents relatively large dust from entering the net filter 36 in which the float 23 is present, so that the float 23 can be kept reliable in response to fluctuations in the water level in the tank 13. Works.

The air flow filtered by the cloth filter 16 and sucked by the main fan 4 is exhausted into the exhaust cover 11 through the exhaust port 13, and is discharged into the atmosphere through the gap 30 provided in the peripheral portion of the exhaust cover 11. It

The cooling airflow of the electric blower 2 is sucked through the gap between the case cover 6 and the upper case 1, passes through the cooling fan 3, and is discharged into the motor cover 5 through the opening 33 of the motor housing 32. 5 is discharged into the upper case 1 through the opening 34, and is discharged into the atmosphere through the gap 35 between the upper case 1 and the exhaust cover 11.

As shown in the illustrated embodiment, the float 23 that responds to changes in the water level in the tank 13 is connected to the net filter 36.
If the inside of the float cage 22 is moved up and down, even if dust is attached to the net filter 36, it does not adversely affect the vertical movement of the float 23.

On the other hand, when the mesh container 48 also serves as the float cage as in the conventional example shown in FIG. 1, if dust adheres to the mesh container 48 and disturbs the vertical movement of the float 44, the tank It is conceivable that the negative pressure sensing / alarm device 47 will not operate even if the inside of B is full of water.

〔The invention's effect〕

As described above, according to the present invention, the following effects can be obtained.

(1) The suction airflow that has entered the tank 13 passes through the check valve 21 and reaches the inside of the inner tank 14 almost straight, and at this time, the bottom opening 20 of the inner tank 14 is shown in FIG. Compared to the conventional vacuum cleaner, it faces the fan 4 at a position far from the fan 4.

Therefore, like the conventional wet-and-dry type vacuum cleaner shown in FIG. 1, the suction airflow entering the tank B passes through the bypass formed between the outer container 43 and the container 42, and the The air flow path is complicated, such as reaching the inside of the container 42 from the upper opening, and the flow path resistance is increased to reduce the suction force.
Since the opening of the container 42 that communicates with the suction fan F is provided in the vicinity of the suction fan F, a part of the suction filter 41, that is, a part of the main filter 41 that opposes the opening of the container 42 where the suction airflow is fast is provided. Only locally, dust is locally adhered and immediately clogged, and the suction force on the suction hose side is reduced in a relatively short time. As a result, the main filter 41 is frequently replaced per unit time. You can eliminate the hassle of having to do it.

(2) The check valve 21 is used for the tank 1 when the vacuum cleaner is stopped.
The 3 side and the inner tank 14 side are separated as independent rooms.

Therefore, another problem of the conventional wet-and-dry type vacuum cleaner shown in FIG.
1 and the side of the water storage tank B are always in communication with each other, so if the vacuum cleaner is stored in a state in which water is stored in the tank B, the water evaporated in the tank B in the summer is the side of the main filter 41. The main filter 41 is moistened by shifting to (4) to increase the ventilation resistance of the main filter when the cleaner is operated next time, and the problem described in (1) above, that is, the suction hose side in a relatively short time Not only can the problem of reduced suction power be further increased, but also the problem that part of the moisture enters the fan drive motor, which is an electric device, can be eliminated.

In short, according to the present invention, in the vacuum cleaner that can be used for both wet and dry, as in the conventional example shown in FIG. 1, the suction force on the suction hose side decreases in a relatively short time, To obtain an improved wet and dry type vacuum cleaner that eliminates the problem of having to frequently replace the dry dust collection filter per unit time and extends the life of the fan drive motor. be able to.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a vertical sectional view showing a concrete example of a conventionally proposed wet-and-dry type vacuum cleaner, and FIG. 2 is an embodiment of a wet-and-dry type vacuum cleaner according to the present invention. FIG. 3 is a perspective view showing a disassembled part of FIG. 1 ... Upper case, 2 ... Electric blower, 4 ... Main fan,
5 …… Motor cover, 6 …… Case cover, 11 ……
Exhaust cover, 12 ... Motor support plate, 13 ... Tank, 14 ... Inner tank, 16 ... Cloth filter, 20 ...
… Aperture, 21 …… Check valve, 22 …… Float cage,
23 …… Float, 36 …… Net filter 39 ……
Rubber damper.

Front page continuation (72) Inventor Masayuki Takagi 1-1-1, Taga-cho, Hitachi City, Ibaraki Hitachi Ltd. Taga factory (56) References JP-A-53-132174 (JP, A) JP-A-55 -166135 (JP, A)

Claims (2)

[Claims] 1. An upper case (1) having a built-in fan (4) for generating a suction airflow, a tank (on which the upper case (1) is mounted and fixed, and which collects water and dust sucked by the suction airflow. 13) and a tank (13)
The upper part of the elastic rubber damper (39) is attached to the lower part (27) of the suction guide (25) provided in
A wet and dry type vacuum cleaner having a structure in which the lower end of this rubber damper (39) is hung down to near the lower surface of the tank (13). The wet and dry type vacuum cleaner is provided inside the tank (13) and is airtight with the suction side of the fan (4). A filter (16) is provided inside the inner tank (14) having an opening (20) at the bottom, and the filter (16) is provided below the opening (20) in response to a change in water level in the tank (13). In addition to providing a float (23) that opens and closes the opening (20) by operating as a whole, and a net filter (36) that is coarser than the filter (16) around the float (23), the inner tank ( A check valve (21) that opens the opening (20) to the filter (16) side by suction airflow in the bottom opening (20) of 14) and closes the opening (20) otherwise. Wet and dry vacuum cleaner, characterized in that the installed. 2. A float (23) according to claim 1, which responds to a change in water level in the tank (13).
The wet and dry type vacuum cleaner in which the float cage (22) is provided inside the net filter (36) and is supported in the float cage (22).