JPH0128746Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to an ultra-low dust vacuum cleaner used in hospitals, pharmaceutical companies, food companies, factories, and clean rooms.

[Conventional technology]

Normal vacuum cleaners mainly consider airtightness on the intake side, but in vacuum cleaners for ultra-low exhaust dust, a high-density exhaust filter (Hepa filter) is installed on the exhaust side to reduce the amount of exhaust dust from 0.3 to 0.0. It is designed to capture 99.95 to 99.99% of micrometer dust. Therefore, by perfecting the airtightness on the exhaust side, all the exhaust air passes through the high-density exhaust filter, thereby ensuring the above-mentioned high collection rate.

Therefore, conventional vacuum cleaners of this type include those that have a high-density exhaust filter airtightly fixed to the upper end of the exhaust pipe placed around the electric blower, and those that do not use an exhaust pipe. A high-density exhaust filter is airtightly fixed to the main body case above the electric blower.

[Problem that the invention attempts to solve]

Because of this configuration, in either type, the size of the high-density exhaust filter alone increases the size of the vacuum cleaner as a whole, resulting in poor stability.

Furthermore, in the former type, the exhaust air passes through the exhaust stack and then passes through the high-density exhaust filter to be exhausted to the outside, while in the latter type, the exhaust air is directly exhausted from the high-density exhaust filter. Since the exhaust air is exhausted to the outside, all types of exhaust air make a lot of noise.

Particularly when this vacuum cleaner is used in a place where silence is required, such as a hospital, a major problem is how to reduce the noise accompanying this exhaust air.

[Means for solving problems]

This idea consists of placing an exhaust pipe with an exhaust hole on the exhaust side and a lid on the top end around the electric blower, and a high-density exhaust filter with the top end covered with a top lid. A first silencing space is formed from the first gap by the lid body and the upper lid of the exhaust pipe, and around the high-density exhaust filter, A safety guide cylinder is disposed, and a second exhaust hole that communicates with an externally opened exhaust hole is provided between the inner wall of the safety guide cylinder and the outer wall of the high-density exhaust filter facing the inner wall.
By forming a sound-deadening space and covering the area around the safety guide cylinder with the main body case, the shape of the vacuum cleaner is made smaller. By passing the exhaust air through two sound-deadening spaces, the exhaust air is reduced in size. This is to reduce the accompanying noise.

[Effect]

The exhaust air from the electric blower is exhausted from the exhaust hole of the exhaust stack to the first gap constituting the first silencing space, where the noise energy is first consumed and the noise is reduced. Next, the exhaust air passes through a high-density exhaust filter to remove fine dust, and then is exhausted into a second gap, which is a second sound-deadening space, where the noise energy is consumed again and the noise of the exhaust air is reduced. is reduced and exhausted to the outside through the exhaust hole that opens to the outside.

〔Example〕

An embodiment of this invention will be described in detail based on FIGS. 1 to 4.

In Figures 1 and 2, 1 is an electric blower, 2
3 is a support plate of the electric blower 1, and a recess 4 for supporting the fan portion 2 is provided in the center. A ventilation hole 5 on the intake side is provided at the bottom of the recess 4.

Reference numeral 6 denotes a support member, which is made of natural rubber, synthetic rubber, or non-breathable foam and is formed into a cylindrical shape with a substantially L-shaped cross section, and is disposed between the fan portion 2 and the recess 4 of the support plate 3. It also serves as a sealing material, and a flange 7 having a shape along the edge of the recess 4 is integrally extended at the upper end.

8 is an exhaust pipe, which is arranged around the exhaust side of the electric blower 1, and has a lid 9 welded to its upper end;
The lower end is welded to the mounting plate 10. Exhaust pipe 8
A large number of exhaust holes 8a through which exhaust air from the electric blower 1 passes are provided on the side surface of the electric blower 1. A vibration isolator 11 that supports the electric blower 1 is provided on the inside back surface of the lid 9 of the exhaust pipe 8, and a vibration isolator 11 that supports the electric blower 1 is provided on the outside surface. A pillar 12 is erected.

The mounting plate 10 is for fixing and attaching the exhaust pipe 8 and the safety guide pipe 13 to the support plate 3, respectively.
0 and are welded, and this mounting plate 10 is screwed to the support plate 3 with screws 14.

The safety guide tube 13 is provided concentrically around the outer periphery of the exhaust tube 8 with a space in which the high-density exhaust filter 17 is inserted.
As shown in the figure, it consists of a bottom part 13a, which is a part of the mounting plate 10, and a cylindrical part 13b, and a guide part for guiding the high-density exhaust filter 17 is provided on the inner wall of the lower end of the cylindrical part 13b. 13d protrudes toward the center, and the outer wall of the lower end of the guide portion 13d is welded to the end of the mounting plate 10 (part of which constitutes the bottom portion 13a). The safety guide tube 13 is integrated with the exhaust tube 8 via the bumper 15, and the upper end of the cylindrical portion 13b is fixed to the main body case 16 via the bumper 15. A large number of exhaust holes 13c through which exhaust air passes are provided in the cylindrical portion 13b.

Note that the guide portion 13d may also be provided on the outer wall of the lower end portion of the exhaust pipe 8, and in this case, similar effects can be obtained.

The main body case 16 protects the electric blower 1, the exhaust tube 8, the high-density exhaust filter 17, and the safety guide tube 13, which are arranged concentrically, and is fixed to the support plate 3 with screws 18. The lower part of the main case 16, that is, the main case 1
A lower exhaust port 19 is provided between the support plate 6 and the support plate 3 for exhausting exhaust air from below to the outside.

The high-density filter 17 is arranged so as to cover the entire circumference of the exhaust pipe 8, and its upper end is connected to the upper lid 17.
d, and is covered with an exhaust pipe 8 and a safety guide pipe 13.
As shown in FIG. 4, the center of the upper cover 17d is inserted into the space between
0, and an umbrella-shaped eave portion 17a is provided on the outer periphery. When the vacuum cleaner 26 is viewed from above, the eaves portion 17a covers the opening of the second gap 23 interposed between the bumper 15 and the high-density exhaust filter 17 as a circular groove. ,
This is to prevent the exhaust air from blowing upward to prevent the indoor air from being disturbed.

In this way, when the high-density exhaust filter 17 is placed in the space between the exhaust pipe 8 and the safety guide pipe 13, the concentric circle interposed between the inner wall of the high-density exhaust filter 17 and the outer wall of the exhaust pipe 8 A first muffling space is formed by the exhaust pipe 8, the lid body 9, and the upper lid 17d from the first gap 23a.

Furthermore, a concentric second gap 23 is formed between the inner wall of the safety guide tube 13 and the outer wall of the high-density exhaust filter 17 facing the inner wall, which communicates with the upper exhaust hole 12 and the lower exhaust hole 19. being second
A silencing space is created.

21 is a sealing material that seals the bottom 1 of the guide cylinder 13.
3a and the bottom 17c of the high-density exhaust filter 17, so that all the exhaust air from the exhaust pipe 8 passes through the high-density exhaust filter 17 and is exhausted to the outside from the exhaust hole 22. It is for the purpose of

The upper part of the main body case 16, that is, the eaves part 17a
An upper exhaust hole 22 that communicates with the second gap 23 and is used to exhaust exhaust air from the upper part of the main body case 16 to the outside is provided in the area covered with. Therefore, the exhaust air is exhausted from both the upper exhaust hole 22 and the lower exhaust hole 19, so that the internal pressure does not increase.

24 is a switch for turning on and off the electric blower 1, 25 is a dust meter, and the main body case 16
is attached to.

A clamp 27 attaches the main body case 16 to the dust collection side case 28 in a detachable manner. 29 is a filter that is removably installed in the dust collection side case 28 whose interior is a dust collection space, 30 is a suction port, 31 is a caster, and a hand handle 32
This makes it possible to move freely.

Reference numeral 33 denotes a front handle that facilitates attachment and detachment of the main body case 16 and the dust collection side case 28. 34 is a safety valve, and when the suction side of a hose or the like is sealed, a leak valve (not shown) is activated to allow outside air to flow in from here to prevent overload from being applied to the electric blower 1. .

Next, the operation will be explained.

First, as shown by arrow A, airflow containing dust is sucked into the dust collection space in the dust collection side case 28 from a hose (not shown) through the suction port 30, and normal dust is removed by the filter 29. removed.

Further, the exhaust air containing fine dust passes through the electric blower 1 and is exhausted into the exhaust stack 8, as shown by arrow B. The first gap 23 from the exhaust hole 8a
When the air is exhausted to point a, the air flows from the first concentric gap 23a interposed between the inner wall of the high-density exhaust filter 17 and the outer wall of the exhaust pipe 8 to between the lid body 9 of the exhaust pipe 8 and the upper lid 17d. The energy of the noise of the exhaust air is consumed in the first silencing space communicating with the first silencing space, and the noise is reduced.

Next, this noise-reduced exhaust air is transferred to the first
The exhaust air enters the high-density exhaust filter 17 from the silencing space, where fine dust is removed and becomes exhaust air with an ultra-low concentration of exhaust dust, forming a second silencing space as shown by arrows C and D. second gap 2
3, the energy of the noise of the exhaust air is consumed again and the noise is further reduced, and then the exhaust holes 22 at the top of the main body case 16 are exhausted.
The air is exhausted to the outside from the exhaust hole 19 at the bottom.

At this time, the upper exhaust hole 22 has a canopy part 17a.
is provided, so the exhaust air flows through the eaves part 17a.
The air will not be blocked and blown upward, and the indoor air will not be disturbed.

Next, disassembly and assembly of the vacuum cleaner 26 will be explained.

When disassembling and assembling the vacuum cleaner 26, screw 1
4 and screws 18 and pull out the exhaust pipe 8 and high-density exhaust filter 17 at once, the electric blower 1 will be exposed.

During assembly, the sealing material 21 is placed on the bottom 13a of the safety guide tube 13, the welded portion with the guide portion 13d is welded, and the screws 14 and 18 are screwed together.

Note that when inserting the high-density exhaust filter 17 between the safety guide tube 13 and the exhaust tube 8, the lower end of the high-density exhaust filter 17 is guided and inserted by the guide portion 13d of the safety guide tube 13, and the high-density exhaust filter 17 is inserted between the safety guide tube 13 and the exhaust tube 8. The bottom portion 17c of the exhaust filter 17 is in airtight contact with the bottom portion 13a of the safety guide cylinder 13 via the sealing material 21.

When the high-density exhaust filter 17 is inserted and fixed around the exhaust pipe 8, a first gap 23a is provided between the exhaust pipe 8 and the safety guide pipe 13, and a second gap 23 is provided between the high-density exhaust filter 17 and the safety guide pipe 13. Therefore, the high-density exhaust filter 17 can be easily attached and detached.

In addition, in order to fix the high-density exhaust filter 17, the exhaust pipe 8 is provided with the fixing pillar 12, so that the side surface of the mounting recess 17b provided on the top surface of the high-density exhaust filter 17 formed of an iron plate. Since the inclination angle can be made smaller, the thickness of the iron plate can be made thinner, and the fixing nut 2 can be made thinner.
0 installation work becomes easier.

[Effect of idea]

This idea consists of placing an exhaust pipe around the electric blower, which has an exhaust hole on the exhaust side and whose upper end is covered with a lid, and a high-density exhaust filter whose upper end is covered with an upper lid. are removably arranged around the exhaust stack with a first gap interposed therebetween, and from this first gap, a first silencing space is formed by the cover body and the upper cover of the exhaust stack, and then a high-density A safety guide cylinder is arranged around the exhaust filter, and a second gap communicating with the exhaust hole opened to the outside is formed between the inner wall of the safety guide cylinder and the outer wall of the high-density exhaust filter facing the inner wall. Since the safety guide cylinder is covered with the main body case, the exhaust air can pass through the two silencing spaces, reducing the noise caused by the exhaust air. It can be significantly reduced.

Furthermore, since a high-density exhaust filter is disposed around the exhaust pipe and the safety guide pipe is covered with the main body case, the overall shape of the vacuum cleaner can be reduced in size.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention: Fig. 1 is a sectional view, Fig. 2 is a sectional view of the main part, Fig. 3 is a perspective view showing the high-density exhaust filter 17 taken out, and Fig. 4 is a cross-sectional view. FIG. 2 is a perspective view of a high-density exhaust filter 17. DESCRIPTION OF SYMBOLS 1...Electric blower, 3...Support plate, 5...Vent hole, 8...Exhaust pipe, 9...Lid of exhaust pipe 8, 13
...Safety guide tube, 13c...Safety guide tube 13
Exhaust hole, 16...Main body case, 17...High density exhaust filter, 17d...Top cover of high density exhaust filter, 19...Lower exhaust hole, 22...Upper exhaust hole, 23a...First Gap, 23...second
Gap, 28...dust collection case, 29...filter.

Claims (1)

[Scope of claim for utility model registration] A dust collection case whose interior forms a dust collection space,
A vacuum cleaner equipped with a filter detachably disposed inside the dust collection case, an electric blower supported by a support plate and disposed in the main body case, and a high-density exhaust filter disposed on the exhaust side. An exhaust pipe having an exhaust hole on the exhaust side and whose upper end is covered with a lid is arranged around the electric blower in the main body, and the high-density exhaust filter whose upper end is covered with a lid, The exhaust pipe is detachably arranged with a first gap interposed around the exhaust pipe, and a first silencing space is formed from the first gap by the cover body of the exhaust pipe and the upper cover, and the high-density exhaust gas is removed from the exhaust pipe. A safety guide tube is disposed around the filter, and a second sound deadening space communicates with an exhaust hole opened to the outside between an inner wall of the safety guide tube and an outer wall of the high-density exhaust filter facing the inner wall. A vacuum cleaner, characterized in that the safety guide tube is surrounded by the main body case.