JPH04300516A - Output-regulating device for suction cleaner using vibration-detecting sensor - Google Patents

Abstract

PURPOSE: To automatically regulate appropriate suction force necessary for cleaning corresponding to the state of a suction surface and the kind of sucked waste refuse by adapting a vibration sensor to a vacuum cleaner. CONSTITUTION: In conventional technique using an optical sensor or an input sensor, there is the point at issue such that a sensing range is restricted and erroneous operation becomes frequent and the efficiency of a vacuum cleaner corresponding thereto is inferior but, in this invention constituted of an electromotive sensing part (A), a frequency separation part (B), a convertion part (C), a control part (D), a motor driving part (E) and an operation state disply part (F), sucked waste refuse is analyzed on the basis of vibration frequency obtained from various impurities and, corresponding to this, the amt. and kind of waste refuse and a suction state are judged to regulate the driving force of a motor.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] The present invention relates to an output control device for a vacuum cleaner using a vibration sensor, and in particular, the vibration sensor is applied to a vacuum cleaner to determine the state of the suction surface, the amount of dust being sucked in, etc. The present invention relates to an output adjustment device for a vacuum cleaner using a vibration sensing sensor that can automatically adjust the suction force necessary for cleaning depending on the amount and type of dirt.

0002

[Prior Art and its Problems] In adjusting the output of a vacuum cleaner in the prior art, a pressure sensor or an optical sensor is used to adjust the motor speed of the vacuum cleaner as appropriate depending on the area to be cleaned. It was constructed to have suction power.

[0003] That is, Japanese Patent Publication No. 1999-1
According to the content described in No. 35325, a light-emitting part that emits light into the flowing air passage and a light-receiving part that receives light from the light-emitting part and outputs a signal are opposite to each other. a dust detection circuit that detects the output of the light receiving section; a storage circuit that stores the amount of passing dust based on the output of the dust detection circuit; It has a comparator circuit that sends a signal to the phase control circuit, and uses a control method that increases the motor rotation speed in stages as the amount of passing dirt increases.

However, such an output adjustment device using an optical sensor is a device that consists of a light receiving section and a light emitting section, and detects the amount of dust flowing in through a flow path between them as a change in scattering of light. If the suction port is clogged, it is determined that there is no dirt and the output is increased, which causes problems such as overloading the motor and causing failure or shortening the life of the equipment. .

Conventionally, an output adjustment device using a pressure sensor, which has a different structure, measures the pressure inside the vacuum cleaner and adjusts the output. When measuring the amount of garbage in the garbage collection bag inside the bag, it is mistakenly assumed to be full of garbage, causing various problems such as malfunctions due to use. was there.

[0006]

OBJECTS OF THE INVENTION Therefore, the present invention has been made in consideration of the conventional problems, and is a method of embedding a pressure sensing device (PIEZO FILM) using a piezoelectric effect at an appropriate position in the suction pipe of a vacuum cleaner. We have developed a vacuum cleaner output adjustment device that uses a vibration detection sensor that detects the amount of dust, type of dust, suction state, etc. by vibrations caused by inflowing dust and various impurities, making it more convenient to use. is intended to provide.

[0007]

[Means for Solving the Problems] In order to achieve the object of the present invention, a PIEZO film (3) serving as a vibration sensing means is embedded at an appropriate position inside the suction pipe (2) of a general vacuum cleaner, and The above-mentioned PIEZ is assembled by a protective case (6) for storing it and a fixing bolt (5), etc.
A fixed protrusion (4) is installed on the inner wall of the suction pipe (2) so as to induce a vortex current in the air (or air containing foreign substances) sucked in at a certain position in front of the O film (3). ) is provided, and a vibration sensing section ( A), a frequency separation unit (B) that separates the frequency signal input from the vibration sensing unit (A) into frequency bands, and a digital signal that can represent the analog signal of the separated frequencies by a combination of binary codes. a signal converter (C) that converts the output signal into It is equipped with a motor drive section (E) that adjusts the speed, and an operation status display section (F) that displays a status signal according to the operation to the outside via a light emitting diode or a buzzer.

[0008]

[Operation] The present invention embeds a pressure sensing device using a piezoelectric effect in an appropriate position of a vacuum cleaner suction pipe, and compares the vibration frequency caused by inflowing dust and various impurities with the natural vibration frequency of the suction pipe. The suction power required for cleaning can be automatically adjusted according to the condition of the suction surface, the amount of dirt being sucked in, and the type of dirt by controlling the output of the motor.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. When the vacuum cleaner 1 is activated through a predetermined activation means, various types of dust are sucked in by the operation of the motor according to the activation, and as shown in FIG. The air containing dust and the like is sucked in by the fixed protrusion 4, causing a vortex current in the same direction as the arrow "P", which applies vibrations to the piezoelectric film 3, which is a vibration sensing means embedded in the inner wall of the suction pipe 2. For example, the vibration frequency obtained by dust and the vibration frequency unique to the suction pipe (2) are sensed and output to the frequency separation section B.

Next, a frequency separation section B separates the signals according to various vibration frequencies, and then a conversion section C converts the separated analog signals into encoded digital signals.
If the signal is output to the control section D via the control section D, the input signal will be analyzed by the control section D. In other words, the motor drive section E and the operation state display section F are caused to output an operation instruction corresponding to this.

On the other hand, the vibration signal outputted through the vibration sensing section A is determined by the vibration frequency obtained from the natural vibration frequency of the suction pipe 2, dust, various impurities, and the like. In other words, if the natural vibration frequency of the suction pipe 2 and the output vibration signal are the same, or if the natural vibration frequency of the suction pipe 2 is continuously output much higher than the vibration frequency obtained by dust and various impurities, the suction port The controller D detects that the suction port is clogged and the amount of air sucked in to vibrate the piezoelectric film 3 is almost gone, and the control unit D determines that the suction port is in operation with the suction port clogged, and displays this via the operation status display unit F. Sends an output signal to inform the outside world.

[0012] Also, the vibration signal of the electric sensing part A is transmitted to the suction pipe 2.
When both signals of the natural vibration frequency and the vibration frequency obtained from dust and various impurities are output, it is possible to detect the general cleaning state and also detect the impurity species (for example, Since the magnitude of the vibration frequency changes according to the amount of dirt, candy scraps, or general garbage), in the process of receiving the vibration signal input from the frequency separation section B and separating it into each frequency band, the impurity species are separated and grasped. When the signal of the grasped contents is inputted to the control part D through each part, the control part sends an instruction signal to the motor drive part E to maintain the appropriate cleaning state according to the signal, and starts rotating the motor. Since the power is increased or decreased, the power adjustment can be controlled according to the cleaning range.

[0013]

[Effects of the Invention] As explained above, the PIEZO film 3, which is the vibration sensing means, detects the vibration frequency in the suction pipe, analyzes this, determines the state of the area to be cleaned, and selects a motor suitable for this. Since the driving force of the vacuum cleaner is adjusted, the cleaning capacity of the vacuum cleaner can be doubled.

[Brief explanation of drawings]

FIG. 1 is a block configuration diagram of the present invention.

FIG. 2 is a sectional view of a sensing section to which the present invention is applied.

[Explanation of symbols]

1 Vacuum cleaner 2 Suction pipe 3 Vibration sensing section (piezoelectric film) 4 Fixed protrusion 5 Fixing bolt 6. Protective case A Vibration sensing part B Frequency separation section C Conversion section D Control section E Motor drive section F　Operating status display section

Claims (2)

[Claims] Claim 1: A vacuum cleaner output adjustment device using a vibration detection sensor, comprising: a suction pipe (2) of a vacuum cleaner (1);
) Vibration sensing unit (A) that detects vibrations based on the amount of dust sucked into the interior and outputs a signal proportional to the vibrations.
, a frequency separation unit (B) that separates the frequency signal input from the vibration sensing unit (A) into frequency bands, and converts the analog signal of the separated frequency into a digital signal that can be represented by a combination of binary codes. A converter (C) that performs the conversion, a control unit (D) that analyzes the output signal of the converter (C) and instructs the operation according to the situation, and controls the rotational speed of the motor based on the signal from the control unit (D). A vibration sensing sensor characterized in that it is equipped with a motor drive section (E) for adjusting the motion, and an operation status display section (F) for displaying a status signal according to the operation to the outside via a light emitting diode and a bazaar. The output adjustment device of the vacuum cleaner used. 2. In the vacuum sensing part (A), a piezoelectric film (3) serving as a vibration sensing means is buried at an appropriate position inside the suction pipe (2) of the vacuum cleaner, and a protective case (6) for storing the piezoelectric film (3) is embedded in the suction pipe (2) of the vacuum cleaner. ) and fixing bolts (5), etc., on the inner wall of the suction pipe (2) so as to induce a vortex current in the air sucked into a certain position in front of where the piezoelectric film (3) is embedded. The output adjustment device for a vacuum cleaner using a vibration detection sensor according to claim 1, characterized in that the fixing protrusion (4) is provided.