JPH11187990A - Electric vacuum cleaner - Google Patents

Abstract

(57) [Problem] To provide an electric vacuum cleaner capable of sufficiently exhibiting the advantages of a circulation type electric vacuum cleaner. SOLUTION: A cleaner main body 21 provided with a dust collection chamber 22 and an electric blower 23 for making the dust collection chamber 22 a negative pressure, a suction port body having a suction chamber having a suction opening on the bottom surface, and dust collection A suction pipe communicating the chamber 22 with the suction chamber; and an exhaust pipe communicating the exhaust side of the electric blower 23 with the suction chamber. The electric blower 23 causes air in the suction chamber to pass through the suction pipe to the dust collection chamber. 22 is a vacuum cleaner for circulating air by sucking air into the suction chamber through the exhaust pipe and cooling the electric blower 23 with a cooling air inlet 26 and a cooling chamber 27. , A duct 233, a cooling exhaust chamber 29, and a cooling exhaust port 28, and a cooling fan for cooling the motor of the electric blower 23.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suction port of a circulation type vacuum cleaner for returning air exhausted by an electric blower to a suction port.

[0002]

2. Description of the Related Art A circulating vacuum cleaner known in the prior art sucks dust and air from a suction opening into a dust collecting chamber of a cleaner body, and the air sucked into the dust collecting chamber is sucked into the cleaner body. The air is circulated by returning from the exhaust chamber to the suction port body.

[0003] This circulation type vacuum cleaner has the advantages that the suction chamber of the suction port body can be almost at atmospheric pressure because exhaust gas is not exhausted to the outside, and the suction port body can be moved smoothly. Have.

[0004]

However, in such a vacuum cleaner, a motor of an electric blower for making the dust collecting chamber a negative pressure uses a part of the exhaust air exhausted from the exhaust chamber. In the case of cooling, the exhaust air used for cooling must be exhausted to the outside. For this reason, the suction chamber of the suction port body has a negative pressure, and there is a problem that the above advantages are impaired. Further, if the dust collecting filter attached to the exhaust chamber is clogged, the amount of exhaust air is reduced, so that there is a problem that the motor cannot be cooled sufficiently.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to achieve the advantages of a circulating vacuum cleaner, and to keep the dust collection filter clogged. An object of the present invention is to provide a vacuum cleaner capable of sufficiently cooling a motor.

[0006]

In order to achieve the above object, the present invention is directed to a cleaner body provided with a dust collecting chamber, an electric blower for making the dust collecting chamber a negative pressure, and a suction port on a bottom surface. A suction port formed with a suction chamber having an opening, a suction pipe communicating the dust collection chamber with the suction chamber, and an exhaust pipe communicating the exhaust side of the electric blower with the suction chamber; A vacuum cleaner for circulating air by sucking air in a suction chamber into a dust collection chamber via the suction pipe by a blower and returning the sucked air to the suction chamber via the exhaust pipe. It is characterized in that a dedicated cooling air path for cooling the motor of the blower is provided, and a cooling fan for flowing cooling air is provided in the cooling air path.

The invention according to claim 2 is characterized in that the cooling fan is arranged on the opposite side of the motor from the fan of the electric blower.

According to a third aspect of the present invention, the cooling fan is provided on a drive shaft of the motor.

According to a fourth aspect of the present invention, a cooling air inlet and a cooling air outlet of the cooling air passage are provided in a cleaner body case, and the cooling air inlet is provided on a lower side and a cooling exhaust port is provided on an upper side. I do.

The invention of claim 5 is characterized in that the cooling exhaust port faces downward.

According to a sixth aspect of the present invention, the cooling air inlet and the cooling air outlet are provided on different surfaces of the main body case.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a vacuum cleaner according to the present invention will be described with reference to the drawings.

1 to 3, reference numeral 20 denotes an upright type vacuum cleaner having a cleaner body 21 and a suction port 30.

Inside the cleaner body 21, a dust collecting chamber 22, an electric blower 23 for making the dust collecting chamber 22 a negative pressure, an exhaust chamber 24 from which air is exhausted from the electric blower 23, and an outside air intake. A cooling chamber 27 having a cooling intake port 26 and a cooling exhaust chamber 29 having a cooling exhaust port 28 for exhausting outside air are provided. A dust collection filter 25 is attached to the dust collection chamber 22.

The dust collecting chamber 22, the exhaust chamber 24, the cooling chamber 27, and the cooling and exhaust chamber 29 are defined by partition walls 22A, 24A, 27A, 29A.
Are respectively formed. The cooling air inlet 26 of the cooling chamber 27 is provided at a lower portion of the main body case 121 of the cleaner main body 21, and the cooling air outlet 28 of the cooling exhaust chamber 29 is provided.
Is provided in the main body case 121 above the cooling air inlet 26. The cooling exhaust port 28 is directed downward, and the cooling air exhausted from the cooling exhaust port 28 is exhausted downward.

As shown in FIG. 4, the electric blower 23 includes a motor 201 mounted in a motor case 200,
A centrifugal fan 210 attached to one end of a drive shaft 202 of the motor 201.
Are covered by a fan case 211. Centrifugal fan 21
The air sucked from the opening 212 of the fan case 211 due to 0 is introduced into an annular air passage 221 formed by an annular air passage wall 220 provided on the outer periphery of the motor case 200. The air introduced into the annular air passage 221 is exhausted by an exhaust hole 222 provided in the annular air passage wall 220.
Is exhausted to the exhaust chamber 24 in the main body 21.

The other end of the drive shaft 202 of the motor 201 has a cooling fan 23 for sending cooling air into the motor case 200.
0 is attached, and the cooling fan 230 is placed in the hole 232 of the cover 231 attached to the lower part (in FIG. 4) of the motor case 200. This hole 232 communicates with the cooling chamber 27 in the main body 21. A duct 233 is attached to a hole 200 </ b> A provided in the motor case 200, and the duct 233 is connected to the cooling / exhausting chamber 29 in the main body 21.
The cooling air sent into the inside of the cooling air chamber 00 is exhausted to the cooling exhaust chamber 29 through the duct 233. The air sucked by the centrifugal fan 210 and the cooling air sent into the motor case 200 are separated by the partition plate 240 so as not to enter each other.

A cooling air passage is formed by the cooling air inlet 26, the cooling chamber 27, the hole 232 of the cover 231, the inside of the motor case 200, the duct 233, the cooling exhaust chamber 29, and the cooling exhaust port 28. Reference numeral 205 denotes a stator coil of the motor 201, and reference numeral 206 denotes a rotor coil of the motor 201.

As shown in FIG. 2, the suction port body 30 has a suction port main body 31, and a suction chamber 34 having a suction opening 33 in a bottom surface 32 is formed at the front side of the suction port main body 31. A rotary cleaning body 35 is rotatably provided in the suction chamber 34. A turbine chamber 36 is defined by a partition wall 46 on the right side behind the suction chamber 34, and a turbine 37 is rotatably provided in the turbine chamber 36.
The rotating shaft 38 of the turbine 37 and the rotating shaft 3 of the rotating cleaning body 35
An endless belt 40 is wound around 9, and the rotary cleaning body 35 rotates as the turbine 37 rotates.

A connecting pipe 41 is provided behind the suction chamber 34.
Are connected rotatably in the up-down direction (in FIG. 1), the connection pipe 41 is composed of a suction connection pipe 42 and an exhaust connection pipe 43, and the suction connection pipe 42 and the suction chamber 34 are connected to the suction port main body. It communicates via a suction air passage 44 formed in 35. Further, the exhaust connection pipe 43 and the turbine chamber 36 communicate with each other via an exhaust air passage 45 formed in the suction port main body 35. The suction connection pipe 42 communicates with the dust collection chamber 22 via the suction pipe 61, and the exhaust connection pipe 43 communicates with the exhaust chamber 2 via the exhaust pipe 62.
It is in communication with 4.

A hole 48 is provided in a partition wall 46 of the turbine chamber 36 and a partition wall 47 that partitions the suction chamber 34, and the hole 48 connects the turbine chamber 36 and the suction chamber 34.

Reference numeral 55 denotes a pair of rollers provided on the front side of the suction port main body 31, and reference numeral 56 denotes a pair of rear wheels provided on the rear part of the suction port main body 31.

Next, the operation of the vacuum cleaner according to the above embodiment will be described.

When the centrifugal fan 210 is rotated by driving the motor 201 of the electric blower 23, the fan case 21
The air in the dust collection chamber 22 is sucked in from the first opening 212, and the pressure in the dust collection chamber 22 becomes negative. Due to this negative pressure, the suction port body 31
Dust is sucked together with air from the suction chamber 34, and the dust and air are sucked into the dust collection chamber 22 of the main body 21 through the suction air passage 44, the suction connection pipe 42, and the suction pipe 61.

On the other hand, the air in the dust collection chamber 22 exhausted by the drive of the electric blower 23 is exhausted to the exhaust chamber 24, and the air exhausted to the exhaust chamber 24 is exhausted from the suction port main body 31 through the exhaust pipe 62. The air is exhausted to the connection pipe 43. The air exhausted to the exhaust connection pipe 43 is exhausted to the turbine chamber 36 via the exhaust air passage 45, and the air exhausted to the turbine chamber 36 is sucked into the suction chamber 34 through the holes 48 of the partition walls 46 and 47. Will be done. Then, the turbine 37 rotates by the air exhausted to the turbine chamber 36, and the rotation of the turbine 37 rotates the rotary cleaning body 35 to rotate the floor surface Y.
Up the dust. The dust and air are sucked into the dust collection chamber 22 in the same manner as described above, and the air is exhausted from the dust collection chamber 22 to the exhaust chamber 24 and circulates.

On the other hand, when the cooling fan 230 is rotated by the drive of the motor 201, outside air is sucked from the cooling air inlet 26 and introduced into the cooling chamber 27. Then, the outside air introduced into the cooling chamber 27 is sent into the motor case 200 through the hole 232 of the cover 231, and the stator coil 205 and the rotor coil 206 of the motor 201 are cooled. The outside air that has cooled the motor 201 is exhausted through the duct 233 to the cooling and exhausting chamber 29,
Is discharged downward from the cooling exhaust port 28 to the outside of the main body 21.

The cooling exhaust port 28 is connected to the cooling intake port 2.
Since it is provided above 6, the dust on the floor surface Y can be prevented from being scattered by the outside air exhausted from the cooling exhaust port 28. In addition, since the cooling air exhausted from the cooling exhaust port 28 is exhausted downward, it is possible to prevent the exhaust from hitting the person performing the cleaning.

A dedicated cooling air path is provided separately from an exhaust air path for exhausting air from the exhaust chamber 24 to the suction port body 30, and outside air is introduced by a cooling fan 230 to cool the motor 201 by the external air. Therefore, the outside air for cooling the motor 201 is supplied to the motor case 200.
The suction chamber 34 of the suction port body 30 does not become negative pressure even if it is fed into the inside. For this reason, the advantage of a circulation type vacuum cleaner can be fully exhibited. Further, regardless of the clogging of the dust collection filter 25, the outside air is sucked in by the cooling fan 230 and the motor 201 is cooled, so that the motor 201 can always be sufficiently cooled.

The cooling fan 230 is a centrifugal fan 21.
Since the dust collection filter 25 is clogged and the rotation speed of the centrifugal fan 210 increases, the rotation speed of the cooling fan 230 increases. The heat generating portion that generates heat by high-speed rotation is further cooled by the cooling fan 230.

In a wet and dry vacuum cleaner, a dedicated cooling air path is provided to cool the motor. However, since a dust collection filter or the like is provided downstream of the electric blower, the dust collection filter is provided. Even if clogging occurs, the above effect cannot be obtained because the rotation speed of the motor does not increase.

The cooling fan 230 is connected to the motor 201
Motor 2 on the opposite side to the centrifugal fan 210
01 can be cooled.

In the above embodiment, the cooling exhaust port 28 and the cooling intake port 26 are provided on the rear surface 121A of the main body case 121. However, the cooling exhaust port 28 may be provided on the front surface 121A of the main body case 121, or Cooling exhaust port 28
The cooling air inlet 26 and the cooling air inlet 26 may be provided on different surfaces. In this way, the outside air exhausted from the cooling exhaust port 28 is prevented from being sucked again from the cooling intake port 26, and the cooling efficiency is improved.

[0033]

According to the first aspect of the present invention, a cooling air path dedicated to cooling the electric blower is provided, and a cooling fan for flowing cooling air is provided in the cooling air path, so that the motor is cooled. Even if the outside air is sent into the motor, the suction chamber of the suction port body does not become negative pressure, and therefore, the advantages of the circulation type vacuum cleaner can be sufficiently exhibited. Also,
Regardless of clogging of the dust collecting filter, the outside air is taken in by the cooling fan and the motor is cooled, so that the motor can always be sufficiently cooled.

According to the second aspect of the present invention, since the cooling fan is disposed on the side opposite to the fan of the electric blower with respect to the motor, the entire motor can be cooled.

According to the third aspect of the present invention, if the cooling fan is provided on the drive shaft of the motor, or if the dust collection filter is clogged and the rotation speed of the centrifugal fan increases,
The rotation speed of the cooling fan also increases, and the heat generating portion that generates heat by the high-speed rotation of the motor is further cooled by the cooling fan.

According to the fourth aspect of the invention, the cooling air inlet and the cooling air outlet of the cooling air passage are provided in the cleaner body case, and the cooling air inlet is provided on the lower side and the cooling air outlet is provided on the upper side. Therefore, it is possible to prevent the dust on the floor from being scattered by the outside air exhausted from the cooling exhaust port.

According to the fifth aspect of the present invention, since the cooling exhaust port is directed downward, the cooling air exhausted from the cooling exhaust port is exhausted downward. It is possible to prevent the person from hitting the exhaust.

According to the sixth aspect of the present invention, since the cooling air inlet and the cooling air outlet are provided on different surfaces of the main body case, the outside air exhausted from the cooling air outlet is drawn again from the cooling air inlet. And cooling efficiency is improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the appearance of a vacuum cleaner according to the present invention.

FIG. 2 is a sectional view showing a configuration of the electric vacuum cleaner shown in FIG.

FIG. 3 is a cross-sectional view conceptually showing the configuration of the vacuum cleaner main body of FIG.

FIG. 4 is a sectional view showing a configuration of the electric blower.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 Vacuum cleaner main body 22 Dust collection chamber 23 Electric blower 26 Cooling intake port 27 Cooling chamber 28 Cooling exhaust port 29 Cooling exhaust chamber 233 Duct

Claims (6)

[Claims] 1. A cleaner main body provided with a dust collection chamber and an electric blower for making the dust collection chamber a negative pressure, a suction port formed with a suction chamber having a suction opening on a bottom surface, and the dust collection chamber. A suction pipe communicating with a suction chamber; and an exhaust pipe communicating with an exhaust side of the electric blower and the suction chamber. The electric blower sucks air in the suction chamber into the dust collection chamber via the suction pipe. And
A vacuum cleaner for circulating the air by returning the sucked air to the suction chamber through the exhaust pipe, wherein a dedicated cooling air path for cooling the motor of the electric blower is provided, and the cooling air path is cooled. An electric vacuum cleaner comprising a cooling fan for flowing air. 2. The electric vacuum cleaner according to claim 1, wherein the cooling fan is disposed on a side of the electric fan opposite to a fan of the electric blower. 3. The vacuum cleaner according to claim 2, wherein said cooling fan is provided on a drive shaft of said motor. 4. A cooling air inlet and a cooling exhaust port of the cooling air passage are provided in a cleaner body case, and the cooling air inlet is provided on a lower side and a cooling exhaust port is provided on an upper side. Vacuum cleaner. 5. The vacuum cleaner according to claim 4, wherein said cooling exhaust port faces downward. 6. The vacuum cleaner according to claim 4, wherein the cooling air inlet and the cooling air outlet are provided on different surfaces of the main body case.