JP2010125193A - Stick-type cleaner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stick-type cleaner which is small and light, has a high sucking capacity, and does not have a bulge. <P>SOLUTION: A floor brush 10 is attached to the top of a cylindrical case 1. A dust collecting room 20, an electrical blower 30 and a driving circuit room 40 are located in the case 1 in this order from its top. Two or more exhaust outlets 41 are placed on the rear end side of the case 1 where the driving circuit room 40 is located. The electrical blower 30 comprises a two-stage axial fan 31 and a brushless DC motor 32. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a stick type cleaner equipped with an electric blower in which a two-stage axial fan suitable for miniaturization and weight reduction and a brushless DC motor with high energy saving performance are mounted.

Conventionally, a canister type cleaner is the mainstream. The canister type cleaner is equipped with an electric blower and is generally composed of a centrifugal fan and a DC motor.
The centrifugal fan has a large fan diameter in order to obtain a large air volume from the feature of blowing in the centrifugal direction. In addition, the DC motor requires a commutator (or brush) and is not suitable for miniaturization because of space. Although it is housed in the cleaner body due to the features of the centrifugal fan and the DC motor described above, the body size is large and heavy.
There are also stick-type cleaners that are smaller and lighter than such canister types.
Such a conventional stick type cleaner is equipped with an electric blower composed of an axial fan and a brushless DC motor. The electric blower part is thicker than the diameter of the stick part, and an inverter that drives the brushless DC motor. The circuit has a bulging shape due to the fact that the circuit is arranged outside the stick portion. For this reason, the operation labor is large and the usability is a problem (see Patent Document 1).
In addition, a stick type cleaner that does not swell, such as an electric blower, has been proposed. Since the weight is a load on the operator, the operation labor is large and the usability is a problem (see Patent Document 2).

JP 2003-204902 A (page 4, FIG. 2) JP 2003-204903 A (first page, FIG. 1)

  The present invention has been made to solve such a conventional problem, and an object of the present invention is to obtain a stick-type cleaner that is small, light, and easy to use without causing the stick shape to swell.

  The stick type cleaner according to the present invention has a floor brush attached to the tip of a cylindrical case, and is arranged in the case from the tip side in the order of a dust collection chamber, an electric blower, and a drive circuit chamber. A plurality of exhaust ports are provided on the rear end side of the case, and the electric blower is constituted by an axial fan and a brushless DC motor.

  The stick type cleaner according to the present invention has a floor brush attached to the tip of a cylindrical case, and is arranged in the case from the tip side in the order of a dust collection chamber, an electric blower, and a drive circuit chamber. A plurality of exhaust ports are provided on the rear end side of the case, and the electric blower is composed of an axial fan and a brushless DC motor, so that the stick shape does not swell and can be reduced in size and weight, and is easy to use. This has the effect of reducing the operation effort.

Embodiment 1 FIG.
1 is a block diagram showing a stick type cleaner according to Embodiment 1 of the present invention, FIG. 2 is a block diagram showing an electric blower of the stick type cleaner, and FIG. 3 is an arrangement of an electric blower and a drive circuit in the stick type cleaner. FIG. 4 is a block diagram of the drive circuit of the stick type cleaner.
As shown in FIG. 1, a floor nozzle 10 is rotatably attached to the tip of a cylindrical case 1. Inside the case l, the dust collection chamber 20, the electric blower 30, and the drive circuit chamber 40 are arranged in this order from the front end side, and all are in communication. A handle is rotatably attached to the rear end of the case 1.
In the dust collection chamber 20, dust is collected by a paper filter or a cyclone method. The drive circuit chamber 40 has a plurality of exhaust ports 1a formed in the case 1, and exhausts air to the outside of the cleaner through an exhaust filter 50 provided in the exhaust port 1a.

As shown in FIG. 2, the electric blower 30 includes a two-stage axial fan 31 and a brushless DC motor 32 using a permanent magnet. The brushless DC motor 32 includes a rotor 32a and a stator 32b.
Since the axial flow fan can be used to flow the wind in the axial direction, the fan diameter can be smaller than that of the centrifugal fan. Further, by using the two-stage axial fan 31, it is possible to further reduce the diameter even under the same air flow condition.
The brushless DC motor 32 using a permanent magnet is more suitable for miniaturization than a DC motor and has good driving efficiency, so that energy saving can be achieved.
As described above, since the electric blower 30 has a configuration suitable for downsizing, for example, an inner dimension of about 50 mm of the cylindrical case 1 can be realized.
This 50 mm is almost the same diameter as a general cleaner handle and is a convenient diameter.

As shown in FIG. 3, the drive circuit chamber 40 is in communication with the electric blower 30, and exhaust from the electric blower 30 flows into the drive circuit chamber 40, so that the heating element on the drive circuit 41 in the drive circuit chamber 40. The effect of cooling is obtained.
This cooling effect eliminates the need for a heat radiating member such as a heat radiating plate or a heat sink in the drive circuit 41, thereby realizing cost reduction, weight reduction, and space saving.
Further, the drive circuit 41 is configured by an elongated electronic substrate so as to fit in a stick shape. For example, the drive circuit 41 is mounted on an electroplating substrate of about 200 mm long × 50 mm wide.

  As shown in FIG. 4, the drive circuit 41 includes a converter 110 connected to an AC power supply 90 via a reactor 100, an electrolytic capacitor 120 connected to the output side of the converter 110, and an input side connected to the electrolytic capacitor 120. The inverter 130, the brushless DC motor 32 connected to the output side of the inverter 130, the DC voltage converter 140 connected to the output side of the converter 110, and the drive voltage is supplied from the DC voltage converter 140. And a position sensor 160 for sending a detection signal for detecting the rotational position of the brushless DC motor 32 to the microcomputer 150.

The AC power supply 90 has an AC voltage of 100 V in a domestic household, but can also handle other AC voltages. Converter 110 forms a bridge circuit composed of a plurality of rectifier diodes.
The inverter 130 constitutes a bridge circuit including a plurality of switching elements and a plurality of freewheeling diodes. For example, a MOSFET or IGBT is used as the switching element.
The microcomputer 150 is generally composed of software, but can also be composed of hardware such as a logic circuit or an electronic circuit.

Next, the operation of the drive circuit 41 will be described with reference to FIG.
When the AC voltage of the AC power supply 90 is input to the converter 110 via the reactor 100 that suppresses the harmonic current and the like, the converter 110 converts the AC voltage and outputs an arbitrary DC voltage, and is smoothed by the electrolytic capacitor 120. The DC voltage thus inputted is inputted to the inverter 130 and also inputted to the DC voltage converter 140.
The DC voltage converter 140 converts the DC voltage into an arbitrary DC voltage and supplies it to the microcomputer 150 as a power supply voltage.
The microcomputer 150 obtains the position information of the brushless DC motor 32 from the position sensor 160, performs control calculation for high-speed driving, and inputs a control signal to the inverter 130.

  As a method for controlling the brushless DC motor 32, general vector control, V / F control, and the like can be given. With the above control, the brushless DC motor 32 can achieve a rotational speed of about 100,000 rpm, and high suction performance can be obtained even in a small electric blower.

Embodiment 2. FIG.
FIG. 5 is a block diagram of the drive circuit of the stick type cleaner according to the second embodiment of the present invention.
In the drive circuit 41 of the second embodiment, the same configurations as those of the drive circuit of the first embodiment are denoted by the same reference numerals, and the description of the duplicate configurations is omitted.
In the second embodiment, as shown in FIG. 5, the position sensor 160 is omitted from the drive circuit 41 (see FIG. 4) described in the first embodiment.
By omitting the position sensor 160, the sensor mounting space inside the motor can be omitted, so that a smaller brushless DC motor 32 can be realized.
In addition, there is an advantage of sensor cost reduction. In this case, high-speed driving of the brushless DC motor 32 can be realized by performing sensorless control that obtains position information from current and voltage flowing in the motor.

  Examples of utilization of the electric blower described in the first and second embodiments include general cleaners and jet towels.

The block diagram which shows the stick type cleaner of Embodiment 1 of this invention. The block diagram which shows the electric blower of the stick type cleaner. The layout of the electric blower and drive circuit in the same stick type cleaner. The block diagram of the power supply drive circuit of the stick type cleaner. The block diagram of the drive circuit of the stick type cleaner of Embodiment 2 of this invention.

Explanation of symbols

  1a exhaust port, 10 floor nozzle, 11 handle, 20 dust collection chamber, 30 electric blower, 31 two-stage axial fan, 32 brushless DC motor, 40 drive circuit chamber, 41 electric drive circuit, 50 exhaust filter, 90 AC power supply , 100 reactor, 110 converter, 120 electrolytic capacitor, 130 inverter, 140 DC voltage converter, 150 microcomputer, 160 position sensor.

Claims (5)

A floor brush is attached to the front end of the cylindrical case, and a dust collection chamber, an electric blower, and a drive circuit chamber are arranged in that order from the front end side. Provided an exhaust port,
The electric blower is composed of an axial fan and a brushless DC motor.   The stick type cleaner according to claim 1, wherein the axial fan is a multi-stage axial fan having two or more stages.   3. The stick type cleaner according to claim 1, wherein the brushless DC motor uses a permanent magnet.   The stick type cleaner according to any one of claims 1 to 3, wherein the brushless DC motor is controlled at high speed by an inverter of a driving circuit disposed in the driving circuit chamber.   The stick type cleaner according to claim 4, wherein the drive circuit includes a position sensor for detecting a rotational position of the brushless DC motor.

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