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Electric vacuum cleaner

A vacuum cleaner, electric technology, applied in the direction of vacuum cleaners, electric components, electrical components, etc., to achieve the effect of low price

Active Publication Date: 2010-06-02
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the above-mentioned problems existing in the prior art, and to provide a high-quality electric vacuum cleaner capable of detecting abnormal electric sparks with a low-cost and simple structure, and taking into account the occurrence of instantaneous voltage drop or In the case of instantaneous power failure, high-precision electric spark detection can be realized

Method used

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Experimental program
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Embodiment 1

[0031] first pass Figure 1 to Figure 4 The electric vacuum cleaner in the first embodiment of the present invention will be described. figure 2 It is an overall perspective view of the electric vacuum cleaner in this embodiment. exist figure 2 Among them, the rear portion of the vacuum cleaner body 21 is provided with an electric blower chamber 22, in which an electric blower 2 is arranged. The front portion of the vacuum cleaner body 21 is provided with a dust collection chamber 23 for catching dust. In addition, the front end of the vacuum cleaner body 21 is provided with a suction port 26, and a connecting pipe 25 provided on one end of the hose 24 is connected to the suction port 26 in a detachable manner. At the other end of the hose 24 there is a front end tube 28 which is gripped during vacuuming and also has a handle 27 . The handle 27 is provided with an operating part 9 for operating the vacuum cleaner body 21. 29 is a freely telescopic extension tube, and one...

Embodiment 2

[0040] Refer below Figure 7 The control process of the electric vacuum cleaner in the second embodiment of the present invention will be described. The overall structure of the electric vacuum cleaner in this embodiment is the same as that of Embodiment 1, and the structure of the control circuit only removes the voltage detection device 15 from Embodiment 1, so a detailed description thereof is omitted here.

[0041] During the electric fan 2 is driven, the signal control device 14 always outputs 1ms to the trigger pulse ( Figure 5 The output value of the current detection device 5 after the ▲ time t3=1ms) is monitored. If the output value of the above-mentioned current detection device 5 is less than 1V, the signal control device 14 judges as "half-wave loss", accumulates the number of times judged as "half-wave loss", and uses this accumulated value every second to detect abnormality. Judgment of electric sparks and control after abnormal electric sparks are confirmed. ...

Embodiment 3

[0046] Refer below Figure 8 The control procedure of the electric vacuum cleaner in the third embodiment of the present invention will be described. The overall structure of the electric vacuum cleaner in this embodiment is the same as that of Embodiment 1, and the structure of the control circuit only excludes the voltage detection device 15 from Embodiment 1, so a detailed description thereof is omitted here.

[0047] During the electric fan 2 is driven, the signal control device 14 always outputs 1ms to the trigger pulse ( Figure 5▲After time t3=1ms), the output value of the current detection device 5 is monitored. If the output value of the above-mentioned current detection device 5 is less than 1.3V, the signal control device 14 judges as "voltage drop", and counts up the number of times. In addition, when the output value of the above-mentioned current detection device 5 is less than 1V, it is judged as "half-wave loss", the number of judgments as "half-wave loss" is...

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Abstract

The invention provides an electric vacuum cleaner which has low cost and simple structure and could detect the abnormal electrical spark with high accuracy and prevent the error detection owing to instant voltage drop or power failure. The electric vacuum cleaner comprises: a current detector (5) for detecting AC flowing into an electric blower (2) and a voltage detector (15) for detecting the power supply voltage; when waveform of the AC flowing to the electric blower (2) has a cycle in an unelectrified state at least in the half-wave period and the power supply voltage is not beyond the prescribed value, the electric quantity of the electric blower (2) is reduced to the prescribed value or the electric blower is stopped to operate; and it determines that the current is flowing or not according to a half-wave loss detection so as to detect the abnormal electrical spark. The current detector installed in the electric vacuum cleaner brings a low cost structure.

Description

technical field [0001] The present invention relates to an electric vacuum cleaner using an electric blower composed of a fan and a reversing (commutator) motor. Background technique [0002] One of the problems in this type of electric vacuum cleaner can be said to be the occurrence of motor sparks at the contact surfaces of the commutator and carbon brushes. Especially for the motor installed inside the electric vacuum cleaner, due to the severe operating conditions, it is easy to generate electrical sparks of the motor, and once the electrical sparks are generated, the operating conditions will further deteriorate. As we all know, if the spark is large, the service life will be greatly reduced, and it will cause various problems such as vibration and malfunction. Although the motor itself has been improving as an anti-spark countermeasure, countermeasures in terms of control are still very necessary. Existing countermeasures of this type include the method of detecting ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A47L5/36A47L9/28H02K11/00H02P21/22H02P23/00H02P27/02
Inventor 中尾浩福嶋雅一
Owner PANASONIC CORP
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