JPH08196481A - Upright type vacuum cleaner - Google Patents

Abstract

PURPOSE: To provide an upright type vacuum cleaner with improved safety, simplified wiring and improved assembly, by mounting and supporting a semiconductor element for controlling power to an electric blower between paths to communicate a permanent opening part constructed in a part of a communicating path of a by-pass indicator and a dust collecting part. CONSTITUTION: A by-pass indicator 44 is constructed by an outer air intake opening and a communicating path 46. The communicating path 46 is formed by a main body case 3 and a rear case to constitute a 90 deg. bent tube air tight path. An FLS element with a cooling fin 52 to control the power to an electric blower 12 in a communicating path 46 between a ventilation hole 42 and a by-pass indicator 44. Since cooling of the FLS element cannot be performed in the unperformable range of the by-pass indicator 44, an always opening permanent opening part is constructed on the back wall of the communicating path 46 in adjacency of the FLS element 51 to take in outer air through the permanent opening part to perform cooling, considering the suction work efficiency, the suction performance, leak noises, etc.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an upright type electric vacuum cleaner.

[0002]

2. Description of the Related Art As disclosed in Japanese Patent Publication No. 5-87245, a conventional vacuum cleaner has a semiconductor element mounted and supported on the intake side of the electric blower in order to enhance the cooling effect of the semiconductor element for control of the electric blower. The structure is the same as that of the upright electric vacuum cleaner.

[0003]

However, since it is supported in the suction passage as described above, the flow of the suction air flow is obstructed, and there are problems such as abnormal noise generation, assembling performance, and safety.
Also, due to the structure of the upright type electric vacuum cleaner, the electric blower is located below, and the upper part is designed to support the electrical components such as switches and power control boards in consideration of usability. When the semiconductor element is provided, the wiring process becomes more complicated, and the problem of assembling occurs. Further, when it is arranged on the intake side of the electric blower, it is a problem in terms of safety to install it near a fan that rotates at high speed. Therefore, by supporting the semiconductor element near the parts such as the switch above the main body where there is no rotating object, it is possible to improve the safety and simplify the wiring process, which contributes to the assembling property.

[0004]

[MEANS FOR SOLVING THE PROBLEMS] The bypass indicator operates when the semiconductor element is supported in a path communicating the bypass indicator and the dust collecting portion and the dust collecting portion is clogged for a certain amount or more. While being guided by the bypass indicator and cooling the semiconductor element in the path, the electric blower is cooled by the external airflow passing through the inside of the dust collecting portion and discharged from the exhaust hole. However, since the semiconductor element cannot be cooled in the region where the bypass indicator does not operate, the semiconductor element can be cooled with a configuration in which a constant opening is provided in a part of the outer wall of the communication path to constantly take in fresh air. Become.

[0005]

According to the present invention, the fresh air is constantly struck on the cooling fins of the semiconductor element through the permanent openings, so that the cooling effect is produced. In addition, due to the clogging of the dust collection part, the bypass indicator operates at a certain air volume, which not only serves as a guideline for waste disposal, but also outside air flows in from the bypass indicator.
A cooling action of the semiconductor element is also imparted through the introduction path.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

A suction case 4 having a rotary brush 2 for scraping up dust on the carpet in a suction chamber 9 is rotatably supported by a lower portion of the vacuum cleaner body 1 and has a length of a hair of the carpet. It has a suction port height adjusting knob 6 for adjusting according to the above.

The operation handle 1 is provided above the mouthpiece case 4.
There is a vacuum cleaner body 1 having 0 on the top. In the electric vacuum cleaner body 1, there is a cord reel unit 15 having a built-in electric blower 12 in the lower portion and a cord reel 18 for winding the power cord 16 in the center on the back surface of the dust collecting portions 14 and 17, There is an electric parts room 20 above the electric parts room 20.
A switch 22 and a power control board 24 are installed in the front panel 26, and a front cover 26 and a main body case 3 are detachable from the front surface.
Then, the rear surface is constituted by the rear case 5.

A belt 28 is wound around the rotary shaft 13 and the rotary brush 2 of the electric blower 12, and the electric blower 12
The rotating brush 2 is driven to rotate in accordance with the operation of. Further, the suction case 4 has a petal 30 for rotating and locking the electric vacuum cleaner body 1 in a tiltable manner, and the suction duct 3 for conveying the dust scraped up by the rotating brush 2 to the dust collecting portion 14 side.
2 is formed. In the electric vacuum cleaner body 1, a telescopic hose 34 that can be attached to the suction duct 32 is disposed from the rear of the dust collecting portion 14 introduction port 36, and the dust collecting portion 14 is provided with a paper bag 38 that catches dust. The holder 40 is detachably locked.

A ventilation hole 42 is provided on the upper wall of the dust collecting portion 14, and the ventilation hole 42 communicates with a bypass indicator 44.
When the paper bag 38 in the dust collecting portion 14 catches dust more than a certain amount and becomes clogged and becomes a certain negative pressure or less, the piston of the bypass indicator 44 moves to take in the outside air, the communication passage 46, the ventilation hole 42. To the electric blower chamber 7 via the dust collecting portion 14 and prevent overheating due to insufficient cooling of the electric blower 12 when the air volume decreases. The bypass indicator 44 is composed of an outside air intake 48 and a communication passage 46, and the communication passage 46 is formed by the main body case 3 and the rear case 5 to form a 90-degree curved pipe airtight path. The bypass indicator 44 is airtightly mounted and supported. on the other hand,
An outside air intake 48 is provided in front of the bypass indicator 44.
The bypass indicator 44 operates when the dust collecting portion 14 is clogged as described above to prevent the electric blower 12 from overheating. Here, the FLS element 51 with the cooling fin 52 for controlling the electric power of the electric blower 12
Is provided in the communication passage 46 between the ventilation hole 42 and the bypass indicator 44, the cooling fins 52 of the FLS element 51 are cooled by the external airflow during the operation of the bypass indicator 44, and the FLS element 51 can be prevented from overheating. However, the inoperable region of the bypass indicator 44, that is, the dust collecting unit 1
Since the FLS element 51 cannot be cooled while the paper bag 38 in 4 is in a state of not collecting dust and before the operation of the bypass indicator 44, the rear wall 5 of the communication passage 46 near the FLS element 51 is
In consideration of suction work rate, suction performance, leak noise, etc., a permanent opening 56 that is always open is provided in 4, and outside air is constantly taken in through the opening 56 and cooled.

The area and size of the permanent opening 56 were examined in consideration of sound, suction power, etc., and as a result, the plurality of small holes 57 and the inverted mortar-shaped portion were separated when the outside air flow was taken in. It is difficult to do and can be made quiet. Further, since the permanent opening 56 is provided on the back wall 54 of the main body case 3, the permanent opening 56 is far from the user during operation of the upright type vacuum cleaner,
Furthermore, the structure is such that it is covered by the expansion and contraction hose 34 and the outside air flow sound is insulated. Regarding the suction power, the permanent opening 56
Of the small holes 57, that is, the number of small holes 57, and can be appropriately selected. The suction power is selected in consideration of the suction performance and the temperature rise value of the electric blower.

In the electric blower chamber 7, an intake duct 62 that connects the intake portion 58 of the electric blower 12 and the suction port 60 of the dust collecting portion 14 is provided, and an inlet of the dispersion exhaust chamber 64 is also provided. .

The dispersion exhaust chamber 64 is a sound deadening space provided so as to cover the dust collecting portion 14 from the rear, and the exhaust flow coming out from the electric blower chamber 12 located below is provided in the exhaust port 66 provided on the side surface of the main body case 3. The exhaust flow is widely dispersed by leading to, and the exhaust flow speed is reduced to muffle and discharge the exhaust. Further, in the dispersion exhaust chamber 64, the cord reel 18, which winds the power cord 16,
A cord reel button 68 is provided to prevent the temperature of the power cord 16 from rising, and an exhaust flow is made to flow therethrough to be cooled and discharged from the exhaust port 66 to the outside of the machine.

Next, the operating state of this embodiment constructed as described above will be explained.

In use, the plug 16a of the power cord 16 is pulled out from the cord reel 18, connected to the power source, and the petal 30 at the rear of the mouthpiece case 4 is stepped on to clean the vacuum cleaner body 1
Is tilted from above the mouthpiece case 4. Next, when the switch 22 is turned on, the electric blower 12 is operated and the electric blower 1
The rotary brush 2 is rotated via the belt 28 together with the suction airflow of 2.

Adjusting the suction port height according to the fur of the carpet 6
By rotating, the amount of protrusion of the front wheel 70 for height adjustment changes, so that it is possible to select and clean the height that suits the fluff of the carpet.

When the cleaning is carried out by the above method, the suction airflow containing a large amount of dust scraped up by the rotary brush 2 passes through the suction duct 32 and the expansion / contraction hose 34 and enters the paper bag 38 in the dust collecting portion 14. The dust is collected, only the air flow is filtered by the paper bag 38, enters the electric blower 12 from the suction port 60 through the intake duct 62, and cools the Ar coil and the St coil. The exhaust flow is between the electric blower chamber 7 and the dispersion exhaust chamber 64. The exhaust flow that has passed through the exhaust filter 72 provided in the above and is further filtered and discharged is discharged to the dispersion exhaust chamber 64, and this exhaust flow is dispersed and the contact pieces of the power cord 16 and the cord reel 18 (not shown). After cooling the contact points (not shown) of the reel support base 74 and the like, the air is discharged from the exhaust port 66 to the outside of the machine.

On the other hand, outside air flow enters from the permanent opening 56.
After cooling the cooling fins 52 of the LS element 51, the dust collecting unit 1
4 flows out to the ventilation hole 42 provided above, flows out from the suction port 60 to the intake duct 62 similarly to the exhaust flow, and is discharged to the outside of the machine from the exhaust port 66 through the same route as above.

[0019]

According to the present invention, the following effects can be obtained.

(1) Considering the operability of the switch and the assembling of the power control board, the electrical components can be concentrated and mounted in the electrical component room, and the FLS elements can be stored and supported nearby, so the wiring process is simple. To reduce noise interference and improve assemblability.

(2) Since the FLS element is arranged in the communication passage of the bypass indicator and the permanent opening is provided in one wall of the communication passage, the cooling fins of the FLS element are constantly cooled by the external air flow. , The reliability of the FLS element is improved by reducing the temperature rise of the FLS element.

(3) In the conventional structure in which the FLS element and the cooling fin are supported on the intake side of the electric blower, the built-in support is difficult and unstable. Although safety was a problem, the present invention has no rotating object in the vicinity, and even if it is misassembled, FLS
The element and the cooling fin have no obstacles and are excellent in safety.

(4) Since the permanent opening is provided on the back side of the main body and is composed of a plurality of small holes, and the cross-sectional shape of the small holes is an inverted mortar shape, separation of the outside airflow is suppressed and airflow noise can be reduced. , The noise can be reduced.

(5) By providing the permanent opening, when it is desired to improve the suction power in the future, the suction power can be improved by closing some of the plurality of small holes in the permanent opening. It can be handled easily and product design becomes easy.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a main part of an embodiment of the present invention.

FIG. 2 is a rear view of the embodiment of the present invention with a rear rear cover removed.

FIG. 3 is a rear view showing a state in which the telescopic hose of the embodiment of the present invention is removed from the suction case.

FIG. 4 is a sectional view showing a permanent opening small hole according to an embodiment of the present invention.

FIG. 5 is a rear view showing the retractable hose storage state of the embodiment of the present invention.

FIG. 6 is a right side view showing a partial cross section of one embodiment of the present invention.

FIG. 7 is a left side view showing a partial cross section of an embodiment of the present invention.

[Explanation of symbols]

1 ... Vacuum cleaner body, 4 ... Suction case, 9 ... Suction chamber,
10 ... Operation handle, 12 ... Electric blower, 14 ... Dust collection part, 34 ... Telescopic hose, 44 ... Bypass indicator.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasunori Odaka 1-1-1 Higashitaga-cho, Hitachi City, Ibaraki Prefecture Incorporated company Hitachi Ltd. Electric Appliances Division, Taga Headquarters (72) Inventor Yukiko Kato Higashitaga, Hitachi City, Ibaraki Prefecture 1-1-1 Machi Incorporated company Hitachi Ltd. Electric Appliances Division Taga Headquarters

Claims (3)

[Claims] 1. A cleaner body containing an electric blower in the lower part, a dust collecting part in the center, a bypass indicator communicating with the dust collecting part in the upper part, and a power control board, and a cleaner body provided above the cleaner body. An operation handle and a suction case connected to the lower part of the electric vacuum cleaner body in a tiltable manner are provided. A suction chamber is provided at a lower front portion of the suction case, and a telescopic hose communicating with the suction chamber is provided at the back of the dust collecting section. In an upright type electric vacuum cleaner configured to rotatably communicate with each other, a permanent opening is provided in a part of a communication passage of the bypass indicator, and the permanent opening and the dust collecting portion are communicated with each other. An upright type electric vacuum cleaner in which a semiconductor element for electric power control of an electric blower is mounted and supported. 2. The upright electric vacuum cleaner according to claim 1, wherein the permanent opening is formed by a plurality of small holes, and the permanent opening is provided on the rear surface side of the main body. 3. The upright electric vacuum cleaner according to claim 2, wherein the cross-sectional shape of the small holes is formed in an inverted mortar shape.