JP2003093298A - Vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the performance of an AC (alternate current)/DC (direct current) vacuum cleaner which is operated by means of both AC and DC and to provide an AC/DC vacuum cleaner having an extremely excellent usability. SOLUTION: The vacuum cleaner includes a motor-driven blower with a motor portion 29 driven by a driving circuit 22, a commercial power source portion 8 including a converting means 26 for converting the commercial power into DC, a DC power source portion 9 formed at a secondary battery 125, and a switching means 25 for switching the power source supplied to the driving circuit 22 to the commercial power source portion 8 or the DC power source portion 9, which provides a usable AC/DC vacuum cleaner having an excellent suction power both in the AC means and in the DC means.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric blower mainly used for an electric vacuum cleaner, and in particular, an electric vacuum cleaner which can be used in both an AC type and a rechargeable type and has high performance. To improve usability.

[0002]

2. Description of the Related Art In recent years, as a vacuum cleaner, an AC / DC vacuum cleaner that can be used both as an AC type that operates with a commercial power source and a rechargeable type that operates with a charged battery has been introduced on the market.

A conventional dual-purpose electric vacuum cleaner is shown in FIGS.
Will be explained.

As shown in FIG. 8, the vacuum cleaner 101 is
A hose 105 having an intake passage (not shown) for sucking dust is detachably connected to a cleaner body 102 (hereinafter referred to as a body), and the operation of the electric vacuum cleaner 101 is connected to the other end of the hose 105. A tip pipe 116 is provided that forms an operating portion 115 for controlling. Also, the tip pipe 1
An extension pipe 106 having an intake passage (not shown) for sucking dust is connected to 16, and a suction tool 107 for sucking dust is connected to the extension pipe 106. The suction tool 107 and the extension pipe 1 are connected to each other.
06 and the intake passage of the hose 105 are configured to communicate with each other.

The main body 102 communicates with the intake passage,
Dust collection chamber 104 for collecting dust sucked from the suction tool 107
Is formed, and the dust collecting chamber 104 is provided behind the dust collecting chamber 104.
An electric blower 103 that communicates with the suction port 119 so as to face the dust collection chamber 104 and emits suction air; a commercial power supply unit 108 that includes a cord 123 that includes a plug 124 that is connected from a commercial power supply; DC power supply unit 1 composed of a secondary battery 125 such as a battery or a nickel hydrogen battery
09 is provided. A circuit unit 122 that controls the power supply to the electric blower 103 is arranged near the electric blower 103.

Next, the electric blower 103 will be described with reference to FIG.

As shown in FIG. 9, the electric blower 103 comprises a motor section 129 and a fan section 128. The motor unit 129 is a commutator motor generally called a universal motor, and has an armature core 1 provided with an armature winding 139.
38 and commutator 142 are provided on the shaft 137, the rotor 145 is connected to the load side bracket 135 and the anti-load side bearing 136 via the load side bracket 133.
And the anti-load side bracket 134 is rotatably provided. Further, the load side bracket 133 and the anti-load side bracket 134 are combined to form a housing of the motor unit 129, and the stator 146 in which the field winding 141 is provided on the field core 140.
And a holder 144 having a carbon brush 143 provided therein are fixed to the anti-load side bracket 134.

The fan section 128 includes an impeller 131 provided on a shaft 137 of a motor section 129 and an impeller 1.
An air guide 132, which is arranged on the outer peripheral portion of 31 and forms an air passage for guiding the airflow flowing out of the impeller 131 to the inside of the motor portion 129 while gradually recovering the pressure, and a casing 130 so as to cover these, are provided. The load side bracket 133 of the portion 129 is integrally attached and configured.

To explain the operation of the above configuration, first, in the case of AC operation, when the plug 124 of the cord 123 of the electric vacuum cleaner 101 is inserted into an outlet of a commercial power source and operated, the circuit section 122 recognizes that AC power is being supplied. Then, the power supply path to the electric blower 103 is controlled, and the electric blower 103 is operated by the AC power supplied from the commercial power supply. When the electric blower 103 operates, the impeller 131 rotates and a suction force is generated, and dirty air including dust and the like is sucked from the suction tool 107 and the suction tool 10
7, the extension tube 106, the hose 105, the main body 102
After removing dust and the like in the dust collecting chamber 104, the air is guided to the electric blower 103.

On the other hand, when the plug 124 of the cord 123 is not inserted into the outlet of the commercial power source, the circuit section 122 identifies the state where the AC power is not supplied,
The electric power supply path to the electric blower 103 is controlled, and the electric blower 103 is operated by the DC electric power supplied from the DC power supply unit 108.

[0011]

However, in the conventional vacuum cleaner 101 for both AC and DC, which has the above-mentioned structure, it is composed of the electric blower 103 of the universal motor which operates in both AC and DC and is supplied with AC power. In either case, the electric blower 103 is operated regardless of the type of voltage supplied. Since the types of supplied voltages are different, in order to operate at either voltage, the motor unit 129 of the electric blower 103 is generally set with characteristics and specifications in accordance with a voltage of 100 V AC. At this time, when the AC blower is used at 100 V, the input / output of the electric blower 103 can satisfy the set characteristics, but when the same electric blower 103 is operated at the DC, the AC and the voltage of the commercial power source are used. Is different (commercial power supply is AC100V, but DC power supply using a secondary battery is generally set in the range of DC10 to 30V in most cases), so compared with the case of using commercial power supply. Thus, the characteristics such as the input / output of the electric blower 103 become very small. In other words, when used with a DC power supply, the suction performance of the vacuum cleaner is low.

SUMMARY OF THE INVENTION The present invention is intended to solve the above-mentioned problems of the prior art, and aims to improve the performance of an AC / DC electric vacuum cleaner that operates both in AC and DC, and is extremely easy to use. The purpose is to provide a vacuum cleaner for both direct and direct use.

[0013]

In order to achieve the above-mentioned object, the present invention provides an electric blower having a motor unit that emits suction air and is driven by a drive circuit, and a suction device that communicates with the electric blower and sucks dust. And a commercial power supply unit having a conversion means for converting the commercial power supply to direct current, and a direct current power supply unit formed of a secondary battery, wherein the power supplied to the drive circuit is the commercial power supply unit or the direct current power supply unit. An electric vacuum cleaner having a switching means for switching to either of the two, and even in both specifications of the direct contact, it is possible to realize an electric vacuum cleaner for both the direct contact and the direct contact with high suction power, and to provide the vacuum cleaner with high usability for both the direct contact and the direct contact. You can

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION The invention according to claim 1 of the present invention is
An electric blower that has a motor unit that emits suction air and is driven by a drive circuit, a suction tool that communicates with the electric blower to suck dust, and a commercial power supply unit that includes a conversion unit that converts a commercial power supply into a direct current, and 2 An electric vacuum cleaner provided with a direct current power supply part formed of a secondary battery and provided with a switching means for switching the power supplied to the drive circuit to either the commercial power supply part or the direct current power supply part, in both alternating and direct specifications. Also, it is possible to realize an electric vacuum cleaner for both direct and direct use having a high suction force, and it is possible to provide an electric vacuum cleaner for both direct and direct use having high usability.

According to a second aspect of the present invention, in the above-mentioned first aspect of the invention, a voltage converting means is provided in the commercial power source section, and the voltage of the commercial power source is stepped down and then converted to direct current. As a result, it is possible to provide an electric vacuum cleaner that can achieve the same high suction performance with both AC and DC, has high performance in both direct and direct use, and has high usability.

The invention according to claim 3 of the present invention is the invention according to any one of claims 1 and 2,
By setting the voltage of the secondary battery in the range of 10V to 30V, the number of 2 o'clock batteries for direct current can be set in a balanced manner with respect to suction performance, size, mass, and usage time. It is possible to provide a vacuum cleaner which can be used, has a high suction performance, has sufficient continuous usability, and has a high usability in which the size and mass are well balanced.

According to a fourth aspect of the present invention, in the above-mentioned first aspect of the invention, the DC power source section is provided with a step-up means for stepping up the voltage of the secondary battery. Suction performance can be realized, high performance for both direct and direct use,
It is also possible to provide an electric vacuum cleaner with high usability.

According to a fifth aspect of the present invention, in the invention according to any one of the second to sixth aspects, the switching means is interlocked with the voltage detecting means for detecting the voltage of the commercial power source section. Since it operates, and automatically switches between commercial power supply and DC power supply, it is possible to provide an electric vacuum cleaner that can be used for both direct and direct use.

According to a sixth aspect of the present invention, in the invention according to any one of the first to fifth aspects, the motor section is an inverter motor section driven by an inverter drive circuit. An efficient and highly reliable inverter motor can realize an AC / DC direct-cleaning vacuum cleaner, and can provide an AC / DC-directive vacuum cleaner having high usability.

According to a seventh aspect of the present invention, there is provided an electric blower having an inverter motor section comprising a first stator winding for a commercial power source section and a second stator winding for a DC power source section, and 1 has a first drive circuit for driving one stator winding and a second drive circuit for driving the second stator winding, and is provided with control means for controlling the drive circuit. However, the same high suction performance can be realized, and it is possible to provide an electric vacuum cleaner that is both for direct and direct use and has high performance and high usability.

The invention according to claim 8 of the present invention is operated by an electric blower provided with a commutator motor section operating on the same shaft by a commercial power source, and an inverter motor section at a position facing the commutator motor section. It is an electric vacuum cleaner for both direct and direct use, and can achieve the same high suction performance with AC or DC,
It is possible to provide an electric vacuum cleaner that can be used both for direct and direct use and has high performance and high usability.

[0022]

(Embodiment 1) Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. The same components as those in the conventional example are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIG. 1, the vacuum cleaner 101 is
A hose 105 is detachably connected to the cleaner body 102, and a tip pipe 116 forming an operation portion 115 is provided at the other end of the hose 105. The extension pipe 106 is attached to the tip pipe 116, and the suction tool 107 is attached to the extension pipe 106.
Are connected and configured.

A dust collecting chamber 104 is formed in the main body 102 so as to communicate with the hose 105, and a suction port 119 is arranged behind the dust collecting chamber 104 so as to face the dust collecting chamber 104 side. The electric blower 3 driven by the inverter drive circuit 22 is provided. In the present embodiment, the inverter drive circuit 22 is installed inside the electric blower 3.

Electric power is supplied to the inverter drive circuit 22 of the electric blower 3 through a switching means 25 as shown in FIG. 2, and the switching means 25 is provided with a cord 123 having a plug 124 connected to a commercial power source. And a commercial power supply unit 8 configured by a conversion means 26 for converting AC of the commercial power supply to DC, and supplying the DC power converted from the commercial power supply,
The secondary battery 125, such as a nickel-cadmium battery or a nickel-hydrogen battery, is configured to be electrically connected to the DC power supply unit 9 that supplies the DC power from the secondary battery 125. Further, the switching unit 22 detects the state of the commercial power supply unit 8, and the voltage detection unit (not shown) determines whether the plug 124 is inserted into the outlet of the commercial power supply and the commercial power is supplied, and the inverter drive is performed. The power supplied to the circuit 22 is switched to either the commercial power supply unit 8 or the DC power supply unit 9.

The operation of the above configuration is as follows.

First, in the AC operation, when the plug 124 of the cord 123 of the electric vacuum cleaner 101 is inserted into the outlet of the commercial power source and operated, the switching means 25 recognizes that the AC power is being supplied, and the commercial power source unit 8 converts the AC power. The supply power path is switched to a path through which the electric power converted into DC through the means 26 is supplied to the electric blower 3, and the electric blower 3 is operated by the DC electric power supplied from the commercial power supply unit 8.
When the electric blower 3 operates, the impeller 131 rotates and a suction force is generated, and dirty air including dust and the like is sucked from the suction tool 107, and passes through the suction tool 107, the extension pipe 106, and the hose 105, and then the main body. After removing dust and the like in the dust collecting chamber 104 of 102, the dust is guided to the electric blower 3.

On the other hand, when the plug 124 of the cord 123 is not inserted into the outlet of the commercial power source, the switching means 25 recognizes that the AC power is not supplied,
The supply power path is switched to the path supplied from the DC power supply unit 9 to the electric blower 3, and the electric blower 3 is operated by the DC power supplied from the secondary battery 125.

Thus, unlike the conventional commutator motor, it is possible to realize an electric vacuum cleaner for both direct and direct use with an inverter-driven motor that has high performance and does not wear the carbon brush.

Further, as shown in FIG. 3, in the commercial power supply section 8, a voltage converting (step-down) means 27 for stepping down the voltage of the commercial power supply such as a transformer is provided between the plug 124 and the converting means 26. Set up. At this time, the voltage conversion means 2
7 is a setting for setting the DC voltage value output from the commercial power supply unit 8 to a level close to the DC voltage output from the DC power supply unit 9, and lowers the voltage of the commercial power supply. Although the DC power supply unit 9 is configured by connecting a plurality of secondary batteries 125 in series, the output voltage of the DC power supply unit 9 is 10 V or more in consideration of weight and size from the viewpoint of mounting on the main body 102. 30V
If the range is set to the following range, the weight, size, suction performance, and usage time of the main body will be well balanced.

According to the above configuration, the DC power supply unit 9 mounted on the main body 102 is limited in terms of weight and size, and a DC voltage obtained by rectifying and smoothing a commercial power supply is about 1%.
Only a low voltage can be output with respect to 40 V, and a large voltage difference occurs between the output voltages of both. However, the commercial power supply unit 8
Since the DC voltage output from the commercial power supply unit 8 is made equal to the DC voltage output from the DC power supply unit 9, the drive circuit 2 of the inverter motor unit 29 is provided.
The power supplied to 2 can supply the same DC voltage value when it is output from the commercial power supply unit 8 and when it is output from the DC power supply unit 9, and the same specifications of the inverter motor unit 29 are provided. Thus, the characteristics when operating with the commercial power source are the same as when operating with the secondary battery 125, and the desired performance can be achieved when using either power source.

Further, as shown in FIG. 4, a booster for boosting and outputting the DC voltage from the secondary battery 125 into the DC power supply unit 9 so as to approach a DC voltage value of about 140 V obtained by rectifying and smoothing the commercial power supply. Means 33 are provided. In this case as well, similar to the above effect, the DC voltage value output from the commercial power supply unit 8 and the DC voltage value output from the DC power supply unit 9 approach each other,
With the same specifications of the inverter motor unit 29, the characteristics when operating with a commercial power source and the characteristics when operating with a secondary battery 125 are the same, and the desired performance can be achieved when using either power source. Further, in the present embodiment, the motor unit 29 has been described as an inverter motor, but the motor unit 2
Even if 9 is the same universal motor as the conventional example, the suction performance can be improved. However, when the motor unit 129 is a universal motor, in principle, the commutator 142 and the pair of carbon brushes 143 are mechanically contacted with each other to supply power to the rotating armature winding 139, so that the motor unit 129 is used as an alternating current. In this case, the difference in the amount of wear of the pair of carbon brushes 143 is likely to occur between the case of using the direct current and the situation of using the direct current, which is disadvantageous in the life of the electric blower 103. Is an inverter motor, the life of the electric blower 3 can be extended.

(Second Embodiment) A second embodiment of the present invention will be described below. The same components as those of the conventional example are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIGS. 5 and 6, in the electric blower 3 having the inverter motor unit 29, the inverter motor unit 29 has the shaft 137 provided with one rotor core 13 having a plurality of magnets. On the outer peripheral side of the rotor core 13, the longitudinal direction of the rotor core 13 is roughly divided into two via an air gap, and the first stator 41
And a second stator 51, two sets of stators are provided. For the first stator 41, the conversion means 2 from the commercial power source is used.
The electric power converted into direct current by the first drive circuit 43
A first stator winding 42, which is supplied via The second stator 51 is provided with second stator windings 52 to which the DC power output from the secondary battery 125 is supplied via the second drive circuit 53.
Further, a control means 55 for controlling both the inverter drive circuits of the first drive circuit 43 and the second drive circuit 53 is provided.

The operation of the above configuration is as follows.

When the electric vacuum cleaner 101 is operated by the commercial power source, the control means 55 drives the first stator winding 42 through the first drive circuit 43 to drive the inverter motor section 2
9 is operated. When operating the electric vacuum cleaner without using the commercial power source, the control means 55 causes the second drive circuit 5 to operate.
The second stator winding 52 is driven through 3 to operate the inverter motor unit 29.

The control means 55 detects the AC voltage applied to the commercial power source section 8 and automatically starts the first drive circuit 4.
Even if 3 is operated, there is no particular limitation on the switching means, such as when the user arbitrarily selects which power source to use.

As described above, since the stator winding of the inverter motor unit 29 is provided according to the type of each power source, it is possible to match the characteristics of the electric blower 3 according to the type of power source, and the commercial power source. The characteristics when driven by the secondary battery 125 are the same as the characteristics when driven by the secondary battery 125, and the desired performance can be achieved regardless of which power source is used.

(Embodiment 3) A third embodiment of the present invention will be described below. The same components as those of the conventional example are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIG. 7, in the electric blower 60 having the commutator motor section 59, the shaft 137 is provided with
In addition to the rotor 145 and the commutator 142 of the commutator motor, one rotor core 13 having a plurality of magnets 12 is provided, and the stator 61 is provided on the outer peripheral side of the rotor core 13 via an air gap. The parts 64 are formed on the same shaft 137. The stator 61 is provided with a stator winding 62 to which the DC power output from the secondary battery 125 is supplied via the inverter drive circuit 63.

The operation of the above configuration is as follows.

When the electric vacuum cleaner 101 is operated by a commercial power source, the AC power supplied through the plug 124 and the cord 123 is transmitted to the commutator motor section 59 of the electric blower 60, and the electric blower 60 operates. . When operating the electric vacuum cleaner without using a commercial power source, the DC power source unit 9
The DC power from drives the stator winding 62 via the inverter drive circuit 63 to operate the electric blower 60.

Thus, according to the type of each power source, the electric blower 60 is operated by the commutator motor unit 59 in the case of commercial power source, and the inverter motor unit in the case of operating by the secondary battery 125. Since 64 operates, it is possible to match the characteristics of the electric blower 3 according to the type of power source, and the characteristics when operating with a commercial power source and when operating with the secondary battery 125 become the same, The desired performance can be achieved with either power supply.

[0044]

INDUSTRIAL APPLICABILITY According to the present invention, it is possible to improve the performance of an AC / DC electric vacuum cleaner that operates with both AC and DC, and provide a very useful AC / DC electric vacuum cleaner.

[Brief description of drawings]

FIG. 1 is a sectional view of an electric vacuum cleaner showing a first embodiment of the present invention.

FIG. 2 is a block diagram showing the same configuration.

FIG. 3 is another block diagram showing the same configuration.

FIG. 4 is another block diagram showing the same configuration.

FIG. 5 is a block diagram showing a configuration of a second exemplary embodiment of the present invention.

FIG. 6 is a cross-sectional view of the main parts of the electric blower.

FIG. 7 is a sectional view of an essential part of an electric blower showing a third embodiment of the present invention.

FIG. 8 is a sectional view of a conventional vacuum cleaner.

FIG. 9 is a sectional view of an essential part of an electric blower built in the electric vacuum cleaner.

[Explanation of symbols]

3 electric blower 8 Commercial power supply 9 DC power supply 22 Inverter drive circuit 25 switching means 26 Conversion means 27 Voltage conversion means 29 Motor part 33 boosting means 42 First Stator Winding 43 First Drive Circuit 52 Second stator winding 53 Second drive circuit 55 Control means 59 Commutator motor part

Continued front page    (72) Inventor Tsuyoshi Tokuda             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. (72) Inventor Tsuyoshi Nishimura             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. (72) Inventor Kazuhisa Morishita             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. F-term (reference) 3B057 DA00 DA02

Claims (8)

[Claims] 1. A commercial machine comprising an electric blower having a motor unit for generating suction air and driven by a drive circuit, a suction device communicating with the electric blower for sucking dust, and a conversion unit for converting a commercial power source into a direct current. An electric vacuum cleaner comprising a power supply unit and a DC power supply unit formed of a secondary battery, and a switching means for switching the power supply to the drive circuit to either the commercial power supply unit or the DC power supply unit. 2. The electric vacuum cleaner according to claim 1, wherein the commercial power supply unit is provided with a voltage conversion means, and the voltage of the commercial power supply is stepped down and then converted into direct current. 3. The electric vacuum cleaner according to claim 1, wherein the voltage of the secondary battery is set in a range of 10 V or more and 30 V or less. 4. The vacuum cleaner according to claim 1, wherein the DC power supply unit is provided with a boosting means for boosting the voltage of the secondary battery. 5. The electric vacuum cleaner according to claim 2, wherein the switching unit operates in conjunction with a voltage detection unit that detects the voltage of the commercial power source unit. 6. The electric vacuum cleaner according to claim 1, wherein the motor unit is an inverter motor unit driven by an inverter drive circuit. 7. An electric blower having an inverter motor section composed of a first stator winding for a commercial power supply section and a second stator winding for a DC power supply section, and a first driving section for driving the first stator winding. An electric vacuum cleaner having a first drive circuit and a second drive circuit for driving the second stator winding, and comprising control means for controlling the drive circuit. 8. An electric vacuum cleaner for both direct and direct operation, which is operated by an electric blower having a commutator motor section operating on the same shaft by a commercial power source and an inverter motor section at a position facing the commutator motor section.