JPH0116172B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an improvement in a vacuum cleaner that can absorb dirty water washed from a floor surface using an electric blower and drain this dirty water using an electric blower.

[Conventional technology and its problems]

Conventionally, forced suction and drainage type vacuum cleaners have adopted a structure in which the motor and the blower are separated by a partition member and the motor is forcedly air-cooled in order to prevent water from entering the motor side of the electric blower. . (example,
(Refer to Japanese Utility Model Publication No. 177351/1983) This type of electric blower cooling device has a long flow path for taking in and discharging air, and a part of the flow path is formed by a wall member provided on the vacuum cleaner body. The structure was complicated, resulting in poor productivity.

SUMMARY OF THE INVENTION An object of the present invention is to provide a vacuum cleaner equipped with a cooling device that simplifies the air intake/exhaust flow path for cooling the motor of an electric blower and improves ease of assembly.

[Means to solve the problem]

In order to achieve the above object, the present invention includes a water absorption tank for storing waste water, etc., a gas-liquid separation section that separates the waste water from air, and a vacuum cleaner main body case connected to the water absorption tank, which is installed in a vacuum cleaner main body case to suck out the waste water. A blower exhaust chamber is provided in the vacuum cleaner main body case, an electric motor of the blower is disposed in the exhaust chamber, and the electric motor is provided with a fan for forced air cooling and an exhaust port for discharging the cooled air. In the water absorption type vacuum cleaner, the motor cover is located in the exhaust chamber and forms a space around the electric motor that communicates with the exhaust port, and the motor cover is installed through a hole formed in the upper surface of the main body case. An outer cylindrical part protruding upward, an inner cylindrical part with which the outer surface of the electric motor contacts the inner side of the outer cylindrical part and which surrounds the fan, and a plurality of partition walls provided between the inner and outer cylindrical parts. , an exhaust port communicating with the inside of the outer cylindrical portion is formed between at least two partition wall portions, an intake port for introducing outside air into the inner cylindrical portion is provided, and a top cover covering the exhaust port and the intake port is attached to the upper surface of the main body case. A continuous partition wall is formed on the inner surface of the top cover and comes into contact with a partition wall that partitions the outer peripheral surface of the inner cylindrical part and the exhaust port, and between the partition wall and the top surface of the main body case, the motor cover's exhaust port and A separate flow path communicating with the intake port is formed.

[Effect]

When the motor cover is placed around the electric motor, the outer cylindrical part forms a space that forms an exhaust flow path that communicates with the motor's exhaust port, and the lower open end of the inner cylindrical part is in contact with the motor/housing, so the exhaust outlet ,
An exhaust flow path and an outside air introduction flow path that are separated to the outside are formed by a top cover that covers the intake port. In this way, simply by attaching the motor cover to the electric motor, a path for forced air cooling of the electric motor is created.
There is no need to provide a special configuration for forced air cooling on the vacuum cleaner body side, and the structure can be simplified.

〔Example〕

Examples of the present invention will be described below.

The main body of the water-absorbing vacuum cleaner consists of a main body case 1 and a water-absorbing tank 2, as shown in FIG. The main body case 1 is securely attached to the water absorption tank 2 by applying the clamp 3.

The water absorption tank 2 is provided with a caster 4 at its lower part and a hose connection stand 5 at its side.

The main case 1 has a small handle 6 and a large handle 7.
is installed.

A current converter 10 is provided inside the water absorption tank 2 facing the hose connection stand 5. This current changing device 10 mainly consists of a rubber current changing plate 11 and a current changing plate support 12.

The current changing plate support 12 extends to near the bottom of the water absorption tank 2, and a window 14 is formed in the front wall 13, and the lower side is open.

During water absorption, the current plate 11 is moved by water pressure and wind pressure.
Since it bends to open the window 14 and curves into a concave mirror shape between the ribs to be described later, there is no reduction in the water flow slowing effect and bubble breaking effect. During drainage, the current variable plate 11 is joined to the front wall portion 13 of the current variable plate support 12 to close the window 14. For this reason, water absorption tank 2
The water inside is drained through the lower opening of the current plate support 12.

The electric blower 20 is attached inside the main body case 1 and mainly includes an electric motor 21 and a blower 22.

This electric blower 20 is supported by a blower support plate 24 attached to a plurality of support arms 23 provided on the main body case 1.

The flange portion 25 of the blower 22 is supported by a motor support base 27 via a vibration-proof rubber portion 26, and the lower portion of the blower 22 is supported by a blower support plate 24 via a vibration-proof rubber portion 28. As shown in FIG. 5, the stop plate 29 has a plurality of holes 29a formed therein, and protrusions 26a protruding from the anti-vibration rubber portion 26 are fitted into these holes 29a to prevent rotation. . Then, attach the stop plate 29 to the motor support stand 2 with the screw 29b.
7, the vibration isolating rubber portion 26 is held down from above.

The electric motor 21 is surrounded by a motor cover 30 as shown in FIG. The motor cover 30 is made of rubber. In this embodiment, the motor cover is formed integrally with the vibration-proof rubber portion 26.

As shown in FIGS. 2 and 3, the upper part of the motor cover 30 has an outer cylindrical part 31 and an inner cylindrical part 32.
and four partition walls 33A, 33B, 3 that connect the two.
3C and 33D are provided. These are also integrally formed of the same material as the motor cover 30.

An intake port 34 is provided in the inner cylindrical portion 32 . An exhaust port 35 is provided in a portion surrounded by the partition walls 33A, 33D, the outer cylindrical portion 31, and the inner cylindrical portion 32.

A hole 8 formed in the center of the main body case 1 is fitted into the outer periphery of the outer cylindrical portion 31 .

The upper part of the motor cover 30 is covered with an upper lid 40, as shown in FIG.

As shown in FIG. 5, this upper lid 40 has an outer circumferential eave portion 41, a C-shaped inner wall portion 42, and partition walls 43A, 43B, 43C, and 43D that connect the two, and a motor cover on the inner wall portion 42. The inner cylindrical portion 32 of 30 is fitted and attached. Motor cover 4
The partition wall 33A on the 0 side is the partition wall 43C of the upper lid 40.
, the partition wall 33B is connected to the partition wall 43D, and the partition wall 33B is connected to the partition wall 43D.
D is joined to the partition wall 43D, respectively. As a result, as shown in FIG. 6, an intake passage (a), an exhaust passage (b), a switch storage chamber (c), and a power cord attachment chamber (d) are partitioned.

The eaves portions 54 of the upper cover 40 corresponding to the intake passage A and the exhaust passage B are closed so as not to come into contact with the upper surface of the main body case 1. Therefore, the intake passage A and the exhaust passage B are communicated with the outside.

On the contrary, the eaves portion 41 corresponding to the switch storage chamber C and the power cord attachment chamber D is joined to the main body case 1. Therefore, the switch storage chamber C and the power cord installation chamber D are separated from the outside, so even if water builds up on the top of the main body case 1, water will not flow into both chambers C and D, making it electrically safe. It is.

A drainage plate 44 is provided on the outer circumferential side of the outer cylindrical portion 31 at a distance from the intake passage A and the exhaust passage B.

The motor 21 is cooled by ventilation as shown in FIGS. 3 and 7. That is, the air flowing through the intake path A is sucked into the electric motor 21 by the fan 50, and after cooling, flows out from the motor exhaust port 51 into the space 52, and is further discharged to the outside from the exhaust port 35 through the exhaust path B. . The electric motor 21 is cooled in this manner, and since the intake passage A, exhaust passage B, etc. are well partitioned as described above, there is no mixed flow of intake air and exhaust air, and efficient cooling can be achieved.

Furthermore, the reason why the intake passage A, exhaust passage B, etc. are partitioned with good airtightness as described above is that the upper cover 40 side is made of plastic, while the motor cover 3
This is because the 0 side is made of rubber. Top lid 4
Even if there is some dimensional variation in the joint between the 0 side and the motor cover 30 side, a good airtight fit can be obtained due to the bending of the rubber.

A valve device 60 for switching water absorption/drainage operation is installed in the main body case 1. Valve device 60
are the blower communication valve 61 and the outside air intake valve 62.
It is composed of.

The blower communication valve 61 is communicated with the blower exhaust chamber 70 via a connecting pipe 63.

On the other hand, the outside air intake valve 62 has an inlet portion 62A.
is provided so as to face the inside of the main body case exhaust chamber 71. The exhaust port 62B side of the outside air intake valve 62 penetrates through the blower support plate 24 and projects toward the water absorption tank 2 side.

The valve shafts of both valves are connected by a lever 64, and an operating rod 65 is fixed to this lever 64. The operating rod 65 is protruded outside the main body case,
A knob 66 is attached to the end. Both valves hold the knobs 66 and pull up the operating rod 65,
Alternatively, by pressing down, it can be switched to water absorption or drainage operation.

In addition, 72 is a switch, 73 is a power cord, 7
Reference numeral 4 denotes an exhaust port for discharging the exhaust gas discharged into the main body case exhaust chamber 75 to the outside.

At the bottom of the blower support plate 24, a float support frame 80 and an intake frame 81 are mainly provided.

The intake frame 81 is attached to the blower support plate 24 in alignment with the intake hole formed in the center of the blower support plate 24 . The float support frame 80 is arranged substantially concentrically so as to surround the intake frame 81 and is connected to the blower support plate 2.
It can be attached to 4.

A float support tube 86 is arranged concentrically inside a cylindrical portion 85 that constitutes the float support frame 80 . The cylindrical portion 85 is partitioned into an upper intake chamber 88 and a lower float protection portion 89 by a partition plate 87 that supports a float support tube 86 . Cylindrical part 8
A filter support portion 90 is provided on the upper outer periphery of the filter 5 . A plurality of ribs 91 are provided on the outer periphery of the cylindrical portion 85.
A plurality of slits 92 are formed below the partition plate 87.

An aluminum filter 93 is attached to the filter support part 80, and a polyurethane after-filter 94 is attached thereon. Here, the filter 93, the after filter 94
constitutes a gas-liquid separation section that separates wastewater and air.

The intake frame 81 is connected to the exhaust port 62B side of the outside air intake valve 62 via a hose 95.

The intake chamber 88 is communicated with the exhaust port side of the blower communication valve 61 via a hose 96.

A float 100 is fitted into the float support tube 86 so that it can move up and down.

A seal packing 110 is interposed at the joint between the main body case 1 and the water absorption tank 2. This seal backing 110 is composed of a base portion 111, a tank side tongue portion 112, and a main body case side tongue portion 113, and has an annular shape. A support structure that opens toward the inner circumference is formed in the base 111, and a corrugated body 114 having an inclined portion is inserted into this support groove and supported.

Next, we will discuss the operation.

(Water Suction Operation) When the electric blower 20 is operated with both valves 61 and 62 set to the water suction operation side, dirty water enters and accumulates in the water suction tank 2 along with air through the hose.

After being separated into gas and liquid in the water absorption tank, the air passes through the after filter 94 and enters the intake chamber 88 of the float support frame 80 . Intake frame 8 from here
1 and is sucked into the blower 22 through the lower opening of the blower, and enters the blower exhaust chamber 70 from the blower. Air is diffused in the blower exhaust chamber 70, passes through the blower communication valve 61 from the connecting pipe 63, is diffused and released into the main body case exhaust chamber 71, and is then further released to the outside of the main case 1 through the exhaust port 74. .

When the water level in the water absorption tank 2 reaches a predetermined value, the float 100 floats to the dotted line position in FIG.
1 is closed. This results in
The suction force in the water absorption tank 2 disappears, and water absorption stops.

(Drain Operation) When the electric blower 20 is operated with the valves 61 and 62 set to the drain operation side, outside air flows into the main body case exhaust chamber 71 through the exhaust port 74. and,
Outside air is sucked in from the intake port 62A of the outside air intake valve 62, passes through the hose 95, and flows into the intake frame 81. From here, the high-pressure airflow sucked into the blower 22 and pressurized enters the valve 61 and then into the hose 96.
The air flows into the intake chamber 88 through the air. This high-pressure air flow enters the float support tube 86 through an air guide port 86a formed on the intake chamber side of the float support tube 86. This high-pressure airflow pushes the float 100 up to the position indicated by the chain line in FIG. Prevent airflow from entering the blower. The air then passes through a high-pressure air stream, a filter 94, etc., and is discharged into the water absorption tank 2. The water in the water absorption tank 2 is pushed downward by the high-pressure air current, so the current transformation device 10
The water rises upward from the lower opening and is drained to the outside via the hose connection stand 5.

〔Effect of the invention〕

As described above, according to the present invention, a flow path communicating with the intake port and the exhaust port is formed by disposing the motor cover around the electric motor and covering the upper part of the motor cover with the top cover attached to the main body case. Therefore, the cooling device can be configured with a minimum number of parts, and since no special members are required on the main body side, the structure is simplified and productivity is improved.

[Brief explanation of drawings]

Fig. 1 is a vertical cross-sectional view of a water-absorbing vacuum cleaner showing an embodiment of the present invention, Fig. 2 is an exploded perspective view of a current converter, and Fig. 3 is a partial vertical cross-sectional view of the main body case including an electric blower. 4 is a perspective view of the motor cover, FIG. 5 is a perspective view showing the mounting structure of the motor cover, FIG. 6 is a perspective view of the top cover, and FIG. 7 is a perspective view of the upper part of the main body case. 1...Vacuum cleaner body case, 2...Water absorption tank,
10...Current transformation device, 20...Electric blower, 21...
...Electric motor, 22...Blower, 26...Vibration-proof rubber,
30...Motor cover, 34...Intake port, 35...
...Exhaust port, 40...Top lid, 50...Fan, 60
... Valve device, 80 ... Float support frame, 90
...After filter.

Claims (1)

[Claims] 1. The vacuum cleaner is equipped with a water absorption tank for storing sewage, etc., a gas-liquid separation unit that separates the sewage from air, and an electric blower that is installed in the vacuum cleaner body case connected to the water absorption tank and that sucks the sewage. An exhaust chamber of the blower is provided in the main body case, a motor of the blower is disposed in the exhaust chamber, a fan for forced air cooling and an exhaust port for discharging cooled air are provided in the motor, and the motor is located in the exhaust chamber. In a water-absorbing vacuum cleaner in which a motor cover is provided around an electric motor to form a space communicating with the exhaust port, the motor cover includes an outer cylindrical portion that protrudes upward from a hole formed on the upper surface of the main body case, and The outer surface of the electric motor contacts the inside of the cylindrical portion, and an inner cylindrical portion that surrounds the fan is provided, and between at least two partition walls of the plurality of partition walls provided between the inner and outer cylindrical portions. Forming an exhaust port leading to the inside of the outer cylindrical part,
An intake port for introducing outside air is provided in the inner cylindrical portion, and a top cover covering the exhaust port and the intake port is attached to the top surface of the main body case, and a partition wall is provided on the inner surface of the top cover to partition the outer peripheral surface of the inner cylindrical portion and the exhaust port. A water absorption type cleaner characterized in that a continuous partition is formed in contact with the main body case, and a separate flow path leading to the exhaust port and the intake port of the motor cover is formed between the partition wall and the top surface of the main body case. Machine.