JPS647773B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an improvement in a water-absorbing vacuum cleaner that uses an electric blower to absorb dirty water that has been washed from a floor surface.

[Conventional technology and its issues] Conventionally, in water-absorbing vacuum cleaners, in order to prevent water from entering the motor side of an electric blower, the motor and blower are separated by a partition member, and the motor is forcedly air-cooled. structure has been adopted. (Example: Tokukai Akira
(Refer to Publication No. 55-166135 and Publication No. 177351 of 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 attached to the main body of the vacuum cleaner. Since it is formed from wall members provided, its structure is complicated and productivity is poor.

In addition, the isolation between the electric motor and the blower is achieved by fitting rubber into the joining part of both elements, and fixing the partition wall part in contact with this rubber.
Provides seals between elements and supports electric blowers.

On the other hand, when assembling an electric blower to the vacuum cleaner body, the rubber is first fitted onto the electric blower, and after confirming this condition, the bulkhead member is inserted from above the vacuum cleaner body so that it matches the rubber, so it is difficult to assemble. Because they have poor performance and are made of different materials, the cost increases due to the increased number of parts.

Furthermore, since the electric motor had a structure in which the lead wires were fixed to the inner surface of the main body case or to a support member provided separately, there were problems such as inefficient wiring work.

An object of the present invention is to provide a water-absorbing vacuum cleaner that is easy to assemble by simplifying the air intake and discharge flow paths for cooling the motor of an electric blower and by integrating the cooling and vibration-proof structure of the electric blower. It is.

[Means to solve the problem]

In order to achieve the above object, the present invention includes a main body case housing an electric blower, a water absorption tank detachably connected to the main body case, a float support frame attached to the main body case and having a float support tube, and a water absorption tank. A water-absorbing vacuum cleaner consisting of a float that slides in a float support cylinder according to the level of sewage stored in a tank and blocks the intake side of the electric blower when a predetermined water level is reached, and the body case includes a blower. An exhaust chamber is provided, and the exhaust chamber is equipped with an electric motor of the blower and a valve device for switching water intake and drainage operation, and an opening is formed in the upper surface of the main body case facing the electric motor, and the electric motor is provided with cooling air on the side of the opening. A fan for taking in the air is provided, a motor exhaust port for discharging the cooled air is provided on the blower side, and a motor cover is provided that isolates the motor intake port from the exhaust chamber and forms an exhaust passage for guiding the cooled air to the outside. A support part is arranged around the electric blower and supports the blower in a vibration-proof manner on one side of the motor cover.
An outer cylindrical part that is fitted into the opening of the main body case is provided on the other side, a cylindrical part that forms an intake port for guiding outside air to the fan is provided inside the outer cylindrical part, and a cylindrical part is provided between the two cylindrical parts. At least two partition walls are provided, an exhaust port communicating with the exhaust passage is formed in a portion surrounded by the partition walls and the cylinders, and a top cover covering the exhaust port is fixed to the main body case. It is characterized by:

[Effect]

When the motor cover is assembled to the electric motor, a space is formed that forms an exhaust flow path that communicates with the exhaust port of the electric motor, and the inner and outer cylinders and partition walls form a space on the intake side that takes in air for cooling the electric motor, and a The exhaust side that exhausts air to the outside is isolated. In this way, simply by attaching the motor cover to the electric motor, a flow path for forced air cooling of the electric motor is formed, so there is no need for a special configuration for forced air cooling on the vacuum cleaner body, and the structure can be easily done.

In addition, since the motor cover and the anti-vibration support part are integrally molded with rubber, the seal between the two parts is ensured.Moreover, the motor cover can be fitted onto the electric blower before the electric blower is assembled into the vacuum cleaner main body case.
Since wiring work can be carried out in this state, it becomes easier to check the mounting state of the motor cover, and the efficiency of assembly work is improved.

〔Example〕

Examples of the present invention will be described below.

The main body of the vacuum cleaner consists of a main body case 1 and a water absorption tank 2, as shown in FIGS. 1 and 2. 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 an intake/outlet port 5 at its side.

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

A current converting device 10 is provided inside the water absorption tank 2 facing the intake/discharge port 5 . This current transformation device 1
0 mainly consists of a rubber current variable plate 11 and a current variable plate support 1
It is composed of 2.

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.

At the time of water absorption, the current variable plate 11 is bent to the position shown by the broken line in FIG. 1 due to water pressure and wind pressure, so 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 13 of the current variable plate support 12 shown by solid lines in FIG. 1 to close the window 14. For this reason,
The water in the water absorption tank 2 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 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. 3 and 4, 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. 6, 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 path A and the exhaust path 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 flexure 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 downward by the partition wall 87.
is formed.

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 packing 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 section 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. The air is diffused in the blower exhaust chamber 70A, passes from the connecting pipe 63 through the blower communication valve 61, and then enters the main body case exhaust chamber 71.
After being diffused and released into the interior, it is further released to the outside of the main body case 1 through the exhaust port 74.

When the water level in the water suction tank 2 reaches a predetermined value, the float 100 floats to the position indicated by the broken line 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 high-pressure airflow then passes through the filter 94 and the like and is discharged into the water absorption tank 2. The water in the water absorption tank 2 is
Because it is pushed downward by the high-pressure air current, the current transformer 1
0 rises upward from the lower opening, and is drained to the outside via the suction/drainage port 5.

〔Effect of the invention〕

As described above, according to the present invention, by arranging the motor cover around the electric motor, a flow path adjacent to and communicating with the intake port and the exhaust port is formed, so that the cooling device can be configured with a minimum number of parts. Moreover, since no special members are required on the main body side, the structure is simplified and productivity is improved.

In addition, since the motor cover and anti-vibration support part are integrally molded from rubber, the sealing performance between the two parts is increased, and it is also easier to check the installation status of the electric blower and the wiring of the electric motor before assembling it to the main body case. , assembly work efficiency is improved.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view of a water absorption type vacuum cleaner showing an embodiment of the present invention, Fig. 2 is a perspective view of the water absorption type vacuum cleaner, and Fig. 3 is a partial longitudinal 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. A main body case that houses an electric blower, a water absorption tank that is detachably connected to the main body case, a float support frame that is attached to the main body case and has a float support tube, and a water absorption tank that corresponds to the water level of sewage stored in the water absorption tank. A water-absorbing vacuum cleaner comprising a float that slides in a float support cylinder and blocks the intake side of the electric blower when a predetermined water level is reached. An opening is formed in the upper surface of the main body case facing the electric motor of the blower, and the electric motor is provided with a fan on the opening side to take in cooling air, and a motor exhaust port on the blower side for discharging the cooled air. A motor cover that isolates the exhaust port from the exhaust chamber and forms an exhaust passage for guiding cooled air to the outside is disposed around the electric blower, and a support part that supports the blower in a vibration-proof manner on one side of the motor cover. of,
An outer cylindrical part that is fitted into the opening of the main body case is provided on the other side, a cylindrical part that forms an intake port for guiding outside air to the fan is provided inside the outer cylindrical part, and a cylindrical part is provided between the two cylindrical parts. At least two partition walls are provided, an exhaust port communicating with the exhaust passage is formed in a portion surrounded by the partition walls and the cylinders, and a top cover covering the exhaust port is fixed to the main body case. A water-absorbing vacuum cleaner featuring