JPH04279129A - Electric vacuum cleaner - Google Patents

Abstract

PURPOSE:To keep a fixed cleaning condition always regardless of the moving speed of a suction port for floor by a method wherein the moving speed of a suction port for floor is detected, and at the same time, the using condition of the suction port for floor is determined by the output of the suction port sensor which detects time required for one reciprocating movement in the longitudinal direction, to control the input to an electric blower. CONSTITUTION:An electric blower control device 45 is constituted of a blower driving unit 43 and a blower control triac 44, and a brush motor control unit 46 performs input control for a brush driving motor 19, based on signals from a microcomputer 40. Pulse waves which are outputted from sction port sensors 37, 38 are inputted to the microcomputer 40, and the moving speed of a suction port for floor in the longitudinal direction and one reciprocating movement time are operated. When the electric vacuum cleaner is set at a manual control position by operating a motion notch setting unit 41, signals in response to the control position are inputted to the micro-computer 40, and the blower driving unit 43 and blower control triac 44 are controlled based on the signals, and power in response to each manual control position is inputted to an elctric blower 7.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum cleaner that automatically controls input to an electric blower depending on usage conditions.

0002

2. Description of the Related Art A conventional vacuum cleaner that detects the pressure inside a dust collection chamber using a pressure detection device and controls the input to an electric blower based on the detected value is disclosed in, for example, Japanese Patent Laid-Open No. 75623/1983.

However, in such conventional technology, the input to the electric blower is simply controlled by detecting the pressure in the intake passage, and it is not possible to optimally control the input according to the floor surface. . In other words, on wooden floors such as wood floors, the suction port tends to stick to the floor surface, and once it sticks, the pressure in the air intake path decreases, and as a result, the input of the electric blower increases, causing the suction port to draw even more to the floor surface. There was a drawback that it started to arrive.

[0004] Also, a vacuum cleaner that detects changes in the current of a rotary brush drive motor of a floor suction port and automatically controls the input of an electric blower based on the detected output is disclosed in, for example, Japanese Patent Laid-Open No. 64-52430. It is shown in the official gazette.

However, during normal cleaning, changes in the current of the rotary brush drive motor are extremely small, and especially when the average current is taken, there is almost no change. Therefore, in the conventional technology described above, the input of the electric blower is simply controlled in proportion to the current of the rotating brush drive motor, so it is difficult to adjust the texture according to the type of floor surface and usage conditions. Fine input control of the electric blower was not possible.

[0006]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned drawbacks by detecting the state of movement of the floor suction port so as to provide the optimum input according to the user's state of use of the vacuum cleaner. The purpose of this invention is to obtain a vacuum cleaner that controls the input of an electric blower based on the detected value.

[0007]

[Means for Solving the Problems] The present invention provides a vacuum cleaner body having an electric blower and a dust collection chamber, a floor suction port, a movement speed of the floor suction port in the front and back direction, and a a suction port sensor that detects the time required for one reciprocating movement of the suction port in the front-back direction; a calculation device that calculates the output value of the suction port sensor; and a calculation device that calculates the output value of the suction port sensor; The present invention is characterized by being provided with an electric blower control device that controls input.

The present invention also provides a vacuum cleaner body having an electric blower and a dust collection chamber, a floor suction port, a roller protruding from the bottom of the floor suction port and rotatably supported, and the roller. A suction port sensor that detects the rotation of the
and an electric blower control device that controls input to the electric blower based on the calculation results of the calculation device. It is characterized by

[0009]

[Operation] According to claim 1, the operating state of the floor suction port is determined by the output of the suction port sensor that detects the moving speed of the floor suction port and detects the time required for one reciprocating movement in the front and back direction. The electric blower input is controlled by determining the

[0010] According to the second aspect of the present invention, the moving state of the floor suction port is detected by a roller protruding from the bottom surface of the floor suction port and rotatably supported, and the detected value is calculated. determines the usage status of the vacuum cleaner and controls the input of the electric blower.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings.

Reference numeral 1 designates a vacuum cleaner body according to the present invention, in which a dust collection chamber 3 with a top opening that can be opened and closed by a lid 2 is provided at the front, and the dust collection chamber 3 is communicated with the dust collection chamber 3 through a vent 4 at the rear. At the same time, each of them is provided with a blower storage chamber 6 having an exhaust port 5 bored in the rear wall.

Reference numeral 7 denotes an electric blower housed in the blower storage chamber 6, and its intake port 7a is communicated with the dust collection chamber 3 in a confidential manner. Reference numeral 8 designates a box-shaped filter having air permeability and shape-retaining properties that is removably housed in the dust collection chamber 3, and 9 is a paper bag filter that is removably housed in the box-shaped filter 8. Further, 10 is an intake filter, and 11 is an exhaust filter.

Further, reference numeral 12 denotes a suction port provided on the lid 2 and rotatably connects the suction hose 13, and includes a suction port 14, a hose connecting cylinder 15 that rotatably holds the suction hose 13, and a suction port 12 that rotatably connects the suction hose 13. - a sliding shutter plate 16 located above the suction connection cylinder 15 to open and close the suction port 14;

17 is a floor suction port with a rotating brush 18 inside.
and a brush drive motor 19 that drives the rotating brush 18, and is connected to the vacuum cleaner main body 1 through an extension pipe 20 and a suction hose 13 to a suction port 14. 21
is an operating section disposed on a hand-held portion 22 provided at the tip of the suction hose 13, and is provided with a sliding operating section 23.

Reference numeral 24 denotes a function display section disposed at the center of the upper surface of the vacuum cleaner main body 1. The function display section 24 has a structure in which a display panel board 25 is illuminated with backlighting from a light emitting diode. The structure is such that its functions are highlighted when the light emitting diodes are turned on. The function display section 24 includes a dust amount display section 26 as shown in FIG.
, a power control display section 27 , and a fuzzy control display section 28 .

The dust amount display section 26 has three light emitting diodes (D1), (D2), and (D3) that light up to display the amount of dust in the paper bag filter 9. The fuzzy control display section 28 is lit by a light emitting diode (D4) to indicate that the electric blower 7 is under fuzzy control, and is turned off when it is under manual control. The power control display section 27 displays the suction force of the electric blower 7, that is, the input control state, and has four light emitting diodes (D5), (D6), (D7), (D
8) 4-stage notch display corresponding to (weak), (medium), (
(strong) and (high power).

Reference numeral 29 denotes the blower storage chamber 6 of the vacuum cleaner main body 1.
The control board storage section is formed in the upper part, and the upper surface is covered with the display panel board 25, and the control circuit elements 30...
, the light emitting diodes (D1) to (D8), and the reflecting plate 3
1 is disposed. 33 is a triac for controlling the blower, and a heat sink 34 is disposed in the air intake side 7a space.

35 shown in FIGS. 7 to 9 is the floor suction port 1.
A roller that protrudes from the bottom of 7 and is rotatably supported.
A light reflecting surface 36 is provided. 37 and 38 are reflective surfaces 3
6 is a pair of suction port sensors installed opposite to the reflecting surface 36 by rotation of the roller 35.
It detects the reflected light and outputs a pulse wave. 3
9 is a substrate on which suction port sensors 37 and 38 are mounted.

Next, a description will be given based on the circuit diagram shown in FIG. 40 is a microcomputer (hereinafter referred to as a microcomputer)
The microcomputer consists of an arithmetic processing section, an input/output section, a storage section, etc.

The operation notch setting section 41 is operated by the sliding operation section 23 and includes a slide volume (not shown) for controlling the input to the electric blower 7. The slide volume changes the input to the electric blower 7 by changing the signal voltage input to the microcomputer 40 depending on the position of the slider, and there are three settings: stop position "off", fuzzy control position "fuzzy", manual control. Corresponding signal voltages are input to the microcomputer 40 depending on the position "weak to high power".

Reference numeral 24 represents the aforementioned function display section, and numeral 42 represents a display section driving section. And power control display section 27-4
The number of light emitting diodes (D5) to (D8) that are turned on changes according to the signal voltage of the operation notch setting section 41 to indicate the input control state. 43 is a blower drive unit, and 44 is a blower control triac. Then, the blower drive unit 43
and a blower control triac 44 constitute an electric blower control device 45. 46 is a brush motor control unit which controls the brush drive motor 19 based on the signal from the microcomputer 40.
Input control is performed. The aforementioned suction port sensor 37,
The pulse wave output from 38 is input to a microcomputer 40 to calculate the moving speed of the floor suction port 17 in the front-rear direction and the time required for one reciprocating movement.

A commercial power supply 47 is input to the microcomputer 40 via a power supply section 48. Reference numeral 49 denotes a zero-cross signal generator, which is input to the microcomputer 40 for controlling the blower control triac 44.

Next, the output waveforms of the suction port sensors 37 and 38 will be explained with reference to FIGS. 10 and 11. The waveforms shown in FIG. 10 are the voltage waveforms output from the suction port sensors 37 and 38 when the roller 35 is rotating,
Since the moving direction of the floor suction port 17 has changed from the pushing direction to the pulling direction at point A), the order of outputs from the suction port sensors 37 and 38 has changed at point (A). Also, in the figure (
Since the moving direction of the floor suction port 17 has changed from the pulling direction to the pushing direction at point B), the order of outputs from the suction port sensors 37 and 38 has changed at point (B). Here Ts
is the time during which the floor suction port 17 is moving in one direction. The waveform shown in FIG.
In this enlarged view of the output waveform, the time from the pulse of the suction port sensor 37 to the pulse of the suction port sensor 38 is T2, and the time from the pulse of the suction port sensor 38 to the pulse of the suction port sensor 37 is T1. It is counted by microcomputer 40.

Next, the processing within the microcomputer 40 of the outputs from the suction port sensors 37 and 38 will be explained with reference to the flowchart shown in FIG. Sliding operation section 2 of operation notch setting section 41
3 and set it to "Fuzzy", first read the counted T1 and T2, and if T1>T2, it is determined that the floor suction port is being pulled, count Ts, and then proceed to the next step. and then return to the main routine again. On the other hand, if T1>T2, it is determined that the floor suction port is being pushed, and the count of Ts is stopped.After performing fuzzy inference using T1 and Ts, the conduction angle of the triac is determined and the phase control of the electric blower is performed. do. After that, T
Substitute 0 for s, proceed to the next step, and return to this routine again.

Next, a method for deriving the lookup table shown in FIG. 13 necessary for fuzzy control will be explained. First, the production rules for fuzzy inference are shown below.

[0027]

[Table 1]

Inputs for the condition part in this case are T1, which is inversely proportional to the moving speed of the floor suction port by the user who cleans, and Ts, which is proportional to the time required for one round trip of the floor suction port. Further, the conclusion part is an input value of the electric blower 7 and corresponds to the conduction angle of the blower control triac 44.

Note that the condition part membership function is shown in FIG.
and Fig. 15, and the conclusion part membership function is shown in Fig. 16.
Shown below. Based on these membership functions, MAX-MI
Inference is made using the N-composition method, and confirmation is made using the centroid method (defuzzifier processing). Here, when T1, which is inversely proportional to the moving speed of the floor suction port 17, is t1, and Ts, which is proportional to the reciprocating time of the floor suction port 17, is ts, the inference is shown in FIG.
As shown in FIG. 23. FIG. 24 shows the result of calculating the logical sum of the inference results for each production rule and determining the final value. In this example, the center of gravity of the shaded area (logical sum) in FIG. 24 is taken,
This value is defined as the final value (the conduction angle of the blower control triac 44). Incidentally, the results of calculating the above fuzzy inference for all possible times T1 and Ts are displayed in the above-mentioned lookup table FIG. 13.

Next, the sliding operation section 2 of the operation notch setting section 41
3 to set the manual control position to "low to high power", a signal corresponding to the control position is input to the microcomputer 40, and the blower drive unit 43 and blower control triac 44 are controlled based on the value. , electric power is input to the electric blower 7 according to each manual control position.

[0031]

Effects of the Invention According to the structure of claim 1, the suction port sensor
Since the state of sliding movement of the floor suction port on the floor surface is detected to determine the usage status of the vacuum cleaner user, input control of the electric blower can be performed in a way that suits the user. In other words, the electric blower is controlled based on the speed at which the floor suction port is moved and the time required for one round trip to determine how quickly and carefully the user cleans, and how strong the user is. To provide a vacuum cleaner that can always maintain a constant cleaning state even when a person uses a vacuum cleaner and does not waste power.

According to the second aspect of the present invention, the usage status of the user can be determined reliably by simply providing a suction port sensor that detects the rotation of the roller protruding from the bottom of the floor suction port, and an expensive pressure sensor is not required. The user can perform optimal input control of the electric blower without using it.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of a vacuum cleaner that is an embodiment of the present invention.

FIG. 2 is a sectional view of the vacuum cleaner.

FIG. 3 is a top view of the vacuum cleaner.

FIG. 4 is an overall side view of the vacuum cleaner.

FIG. 5 is a top view of the operation section of the vacuum cleaner.

FIG. 6 is a partial cross-sectional view of the floor suction port.

FIG. 7 is a side view of the floor suction port.

FIG. 8 is a bottom view of the floor suction port.

FIG. 9 is a cross-sectional view of the roller.

FIG. 10 shows the output waveform of the suction port sensor (optical sensor).

FIG. 11 is an enlarged view of the output waveform of the suction port sensor (optical sensor).

FIG. 12 is a flowchart showing an arithmetic processing method in a microcomputer.

FIG. 13: Lookup table.

FIG. 14: Membership function at time T1.

FIG. 15: Membership function of time Ts.

FIG. 16: Conclusion membership function.

FIG. 17 is an explanatory diagram schematically showing the process of fuzzy inference.

FIG. 18 is an explanatory diagram schematically showing the process of fuzzy inference.

FIG. 19 is an explanatory diagram schematically showing the process of fuzzy inference.

FIG. 20 is an explanatory diagram schematically showing the process of fuzzy inference.

FIG. 21 is an explanatory diagram schematically showing the process of fuzzy inference.

FIG. 22 is an explanatory diagram schematically showing the process of fuzzy inference.

FIG. 23 is an explanatory diagram schematically showing the process of fuzzy inference.

FIG. 24 is an explanatory diagram schematically showing the results of fuzzy inference.

[Explanation of symbols]

1 Vacuum cleaner body 3 Dust collection chamber 7 Electric blower 17 Floor suction port 35 Roller 37 Suction port sensor (optical sensor) 38 Suction port sensor (optical sensor) 40 Microcomputer (computing device) 45 Electric blower control device

Claims (2)

[Claims] [Claim 1] A vacuum cleaner body having an electric blower and a dust collection chamber, a floor suction port, a movement speed of the floor suction port in the front and rear direction, and a movement speed of the floor suction port in the front and rear direction. A suction port sensor that detects the time required for one reciprocating movement, a calculation device that calculates the output value of the suction port sensor, and an electric blower control device that controls the input of the electric blower based on the output of the calculation device. A vacuum cleaner characterized by being provided with. 2. A vacuum cleaner body having an electric blower and a dust collection chamber, a floor suction port, a roller protruding from the bottom of the floor suction port and rotatably supported, and the rotation of the roller being controlled. a suction port sensor for detection; a calculation device that calculates the moving speed and one round trip time of the floor suction port from the output value of the suction port sensor; A vacuum cleaner characterized by being provided with an electric blower control device that controls the input of the electric blower.