JP3040337B2 - Vacuum cleaner suction device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suction device for a vacuum cleaner.

[0002]

2. Description of the Related Art FIGS.
This will be described with reference to FIG.

In FIG. 4, reference numeral 101 denotes a floor nozzle pipe,
102 is a suction tool main body, 103 is a pipe cover, 10
5 is a ring cover, and 104 is an arm for rotatably connecting the suction tool main body 102 to the floor nozzle pipe.
A rotating brush that is rotated by an air turbine is disposed in the suction tool main body 102, and the rotating brush is protected by a brush cover 102a. In addition, a display element 106 is provided on the suction tool main body 102, and when the display element 106 is turned on, it is notified that dust is equal to or more than a predetermined amount.

The pipe cover 103 and the floor nozzle pipe 10
1 and 2, a power supply battery 107, a printed circuit board 108, a light receiving element 109a,
A pressure switch 110 is provided. Further, a light emitting element 109b is arranged in a lower space of the ring cover 105. The light-receiving element 109a and the light-emitting element 109b disposed so as to face the floor nozzle pipe 101 up and down constitute a photoelectric dust detection sensor 109.
1 to detect dust contained in the intake air flow. The suction device of the conventional example is designed so as to be suitable for cleaning a general cleaning surface such as carpet, wooden floor, and folding, and the sensor sensitivity of the dust detection sensor 109 is suitable for detecting dust sucked from the carpet. It is set as follows.

The pressure switch 110 is connected to the floor nozzle pipe 1
When an intake air flow is present in 01, the air flow is detected and the current of the power supply battery 107 is supplied to the dust detection sensor 109, the printed circuit board 108, the display element 106, and the like. In addition,
111 is a power supply battery 107 in the floor nozzle pipe 101.
And a connection cord for electrically connecting the printed circuit board 108 and the display element 106 of the suction tool main body 102.

[0006]

However, in such a conventional configuration, since a battery is used as a power source, it is necessary to replace the battery with the end of its service life. Along with this, there has been a problem that the luminance of the display element also decreases, making it difficult to see. Also, a connection cord was required, and there was a problem in workability.

Further, since both the light receiving element and the light emitting element constituting the dust detection sensor are exposed to the airflow containing a large amount of dust, these elements, especially the light receiving surface of the light receiving element become dirty, and the sensitivity of dust detection is low. There was a problem of lowering.

Further, in the conventional configuration, since the sensor sensitivity of the dust detection sensor is set for carpet dust, a display element for displaying the presence or absence of dust when cleaning a futon or the like containing a large amount of fine dust. Sometimes did not light. Conversely, when the sensor sensitivity is increased so as to be suitable for cleaning futons and the like, the amount of dust, type, particle size, and the like on a general cleaning surface such as carpet, wooden floor, and folding are various. Therefore, there is a problem that a display element for displaying the presence or absence of dust or the amount of dust remains on and does not turn off.

[0009] Vacuum cleaners provided with the above-mentioned dust detection sensor are limited to so-called high-grade and middle-class vacuum cleaners. In some cases, it is not possible to add a vacuum sensor to existing vacuum cleaners even if one wants to use a dust detection sensor.On the other hand, it is not possible to replace the vacuum cleaner just because one with a dust detection sensor is required. Economy.

An object of the present invention is to solve the above problems.

[0011]

According to a first aspect of the present invention, a floor nozzle pipe communicating with a vacuum cleaner, a dust detection sensor, a display element for displaying the presence or absence of dust, and a dust detection device are provided. An electronic circuit that receives a signal from a sensor to control the display element; a wind generator that has a windmill that rotates by wind power and supplies a power supply voltage to the electronic circuit; an intake hole that takes in outside air; and the floor nozzle An exhaust port communicating with an intake passage in a pipe is provided, the wind turbine is disposed in the communication passage between the intake hole and the exhaust port, and the dust detection sensor is located on the downstream side of the intake passage and substantially flush with the exhaust port. And the suction flow from the exhaust port flows to the dust detection sensor side.

According to a second aspect of the present invention, in order to achieve the above object, in the first aspect, a bent portion is provided on a part of the floor nozzle pipe on the suction tool main body side, and a wind force is provided above the bent portion on the downstream side of the intake passage. It is characterized by having a generator.

According to a third aspect of the present invention, in order to achieve the above object, in the first or second aspect, the sensitivity of the dust detection sensor is set so as to be suitable for detecting fine dust having a particle diameter of 70 μm or less. It is characterized by.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to the drawings.

The futon-specific suction device shown in FIG. 1 includes a floor nozzle pipe 1 and a suction device main body 2 mounted and fixed to the tip of the floor nozzle pipe 1. Plastic suction unit 2
The nozzles project from both sides in a direction perpendicular to the axis of the floor nozzle pipe 1, and a nozzle forming plate 21 is mounted and fixed to the lower surface opening. The central part of the nozzle forming plate 21 is the suction port 2
The rotary brushes 23 are provided on both sides of the suction port 22. These rotating brushes 23, 2
Numeral 3 is for preventing the suction port 22 from clinging to the surface of the futon P during cleaning.

The floor nozzle pipe 1 is a cylindrical pipe whose tip 11 is bent, and is made of plastic.
The base end 12 of the floor nozzle pipe 1 is detachably attached to a main body-side dust collection pipe of a vacuum cleaner, a connection pipe of a hand-held vacuum cleaner, and the like.

A flat portion 13 is formed on the upper surface of the floor nozzle pipe 1, and a pipe cover 3 is attached by screws 4 so as to cover the flat portion 13. A wind power generator 5, a printed circuit board 6, a display element 7, and a light receiving element 8a are arranged in a space formed between the plastic pipe cover 3 and the flat portion 13. A plastic ring cover 9 surrounding the periphery of the floor nozzle pipe 1 is attached to the pipe cover 3, and a light emitting element 8 b is arranged in a space below the ring cover 9.

The wind power generator 5 includes a power generator body 5a, a wind turbine 5
b, an air flow adjusting valve 5c, and is seated on a wind power generator mounting seat 13a on the flat portion 13. The wind power generator 5 is fixed at the wind power generator mounting portion 3a of the pipe cover 3. The pipe cover 3 is provided with an intake hole 3b for taking in outside air for rotating the wind turbine 5b, and an air flow port 5d is also provided on the side of the wind power generator 5. Further, the flat portion 13 is provided with an exhaust port 13b for guiding the air having rotated the windmill 5b to the main intake passage T.

At the time of cleaning, a suction force acts on the floor nozzle pipe 1, and the air Q sucked together with dust from the suction port 22 is sucked into the main body of the vacuum cleaner through the main suction passage T. You. At this time, at the same time, the air taken in from the intake hole 3b flows into the wind power generator 5 from the air circulation port 5d, generates power by rotating the wind turbine 5b, and passes through the exhaust port 13b to become the suction flow S. And flows out to the main intake passage T. Reference numeral 10 denotes a filter for preventing intrusion of dust from the intake hole 3b.

The light receiving element 8a and the light emitting element 8b are arranged at opposing positions with the main intake passage T interposed therebetween, and constitute a photoelectric dust detection sensor 8. The light receiving element 8a is provided near the substantially same surface side of the exhaust port 13b and downstream of the main intake passage T as clearly shown in FIG. The light receiving element 8a and the light emitting element 8b are
c and 8d to prevent damage due to dust. The flat portion 13 has an opening 13c for transmitting light to the light receiving element 8a, and the floor nozzle pipe 1 has an opening 14 for transmitting light to the light emitting element 8b.

Since the light receiving element 8a is provided at the above-mentioned position, the clean outside air entering through the air inlet 3b becomes the suction flow S and strokes the surface of the transparent holder 8c.
Since it is sucked into the vacuum cleaner, dust can be prevented from adhering to the surface of the transparent holder 8c. In this embodiment, the light receiving element 8a is connected to the exhaust port 13b.
However, the same effect can be obtained by disposing the light emitting element 8b side near the exhaust port 13b.

The display element 7 is illuminated based on the detection of the dust detection sensor 8 when the amount of dust in the air flowing through the main intake passage T is equal to or more than a predetermined amount. The portion corresponding to the display element 7 of the pipe cover 3 is a transparent window 3c so that this lighting can be known from the outside.

The printed circuit board 6 constitutes an electronic circuit for dust detection together with the wind power generator 5, the dust detection sensor 8, and the display element 7. FIG. 2 shows a block diagram thereof. According to this electronic circuit, when the fine dust on the futon P is sucked by the vacuum cleaner, the light receiving element 8a is changed according to the amount of the dust.
When the amount of received light changes, the output voltage of the light receiving element 8a also changes in accordance with the amount of received light. The amplifier 6a on the printed circuit board 6 amplifies only the amount of change (AC component) of the light receiving element 8a, and displays the presence or absence of dust on the display element 7 with a voltage corresponding to the amplitude of the AC component.

The printed circuit board 6 is seated on a board mounting seat 13 d on the flat portion 13 and is fixed by a board mounting portion 3 d of the pipe cover 3.

The ring cover 9 is assembled to the floor nozzle pipe 1 and the pipe cover 3.

The wind power generator 5, as shown in FIG.
It is provided obliquely above the bent portion R of the floor nozzle pipe 1, that is, above the downstream side of the main intake passage T. The dust detection sensor 8 is provided diagonally above the wind power generator 5, that is, downstream of the main intake passage T.

The suction device of the present embodiment is dedicated to a futon, and sucks fine dust such as a futon, a sheet, a blanket and the like. FIG. 3 is a graph showing the result of analyzing dust collected from the futon. As shown in FIG. 3, the fine dust component of the futon is composed of protein components such as human dandruff, dirt, and hair, and Mostly carbohydrate components such as cotton, sweets and fibers. The average of the particle size is about 20 to 70 μm. If the gain characteristic of the dust detection sensor 8 is low, fine dust cannot be detected, and if the gain characteristic is too high, the display element 7 may remain lit. In the present embodiment, the gain characteristic of the amplifier 6a is set in the range of 32 to 40 dB so that the sensor sensitivity of the dust detection sensor 8 is suitable for detecting fine dust having a particle diameter of 70 μm or less.

The present invention is not limited to those shown in the above embodiments, but can be applied to, for example, those for cleaning general cleaning surfaces such as carpets, wooden floors, and tatami.

[0029]

According to the first aspect of the present invention, voltage power can be supplied to the electronic circuit by the power generation of the wind power generator. Therefore, unlike the conventional example, the battery is not required, and the trouble of replacing the battery is not required. It is convenient. In addition, the luminance of the display element can always be kept in a favorable state, and a display that is easy to see can be obtained.

Also, relatively clean air that has passed through the wind power generator can be sent to the dust detection sensor downstream thereof, and the surface of the dust detection sensor can be cleaned, thereby maintaining the sensor sensitivity of the dust detection sensor. Can be.

According to the second aspect of the present invention, in addition to the effects of the first aspect, the wind generator is arranged above the downstream side of the bent portion of the floor nozzle pipe, so that the air flow sucked from the suction device main body is provided. Dust inside can be prevented from entering the wind power generator, and it is easy to receive the suction force from the cleaner body side, so that stable power generation is possible even with a low suction force.

According to the third invention of the present application, in addition to the effects of the first or second invention, the sensitivity of the dust detection sensor is 7
Since the setting is made so as to be suitable for detecting fine dust having a particle diameter of 0 μm or less, fine dust of an invisible futon can be properly detected and displayed, and the efficiency and usability of futon cleaning are improved. And as it can be used as a futon exclusive suction tool, it can be used for a vacuum cleaner already purchased,
Alternatively, it can be added as an optional equipment to a newly sold vacuum cleaner.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a block diagram showing the electronic circuit.

FIG. 3 is a graph showing a component ratio of dust generated from a futon.

FIG. 4 is an external perspective view showing a conventional example.

FIG. 5 is a longitudinal plan view thereof.

FIG. 6 is a cross-sectional plan view thereof.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Floor nozzle pipe 2 Suction tool main body 3 Pipe cover 3b Intake hole 5 Wind power generator 5b Windmill 6 Printed circuit board 7 Display element 8 Dust detection sensor 13 Flat part 13b Exhaust port T Intake path R Bent part

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Masahiro Ishikawa 1 Yasushi Electric Co., Ltd., Ishiharanogami 1 Kichijoin, Minami-ku, Kyoto, Kyoto (56) References -285082 (JP, A) Japanese Utility Model Showa 60-129257 (JP, U) Japanese Utility Model Showa 60-195660 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) A47L 9/28 A47L 9/02

Claims (3)

(57) [Claims] A floor nozzle pipe communicating with the vacuum cleaner, a dust detection sensor, a display element for displaying the presence or absence of dust, an electronic circuit for receiving the signal from the dust detection sensor and controlling the display element, A wind power generator having a windmill rotating by wind power and supplying a power supply voltage to the electronic circuit, an intake hole for taking in outside air, and an exhaust port communicating with an intake passage in the floor nozzle pipe; The wind turbine is disposed in a communication path communicating with the exhaust port, and the dust detection sensor is provided on the downstream side of the intake path and substantially near the same side of the exhaust port, and the suction flow from the exhaust port detects dust. A suction device for a vacuum cleaner, wherein the suction device is configured to flow to a sensor side. 2. The suction tool for a vacuum cleaner according to claim 1, wherein a bent portion is provided in a part of the floor nozzle pipe on the suction tool main body side, and a wind power generator is disposed above the bent portion on the downstream side of the intake passage. 3. The dust detection sensor has a sensor sensitivity of 70 μm.
The suction tool for a vacuum cleaner according to claim 1 or 2, wherein the suction tool is set to be suitable for detecting fine dust having the following particle diameter.