JPH04193131A - Vacuum cleaner - Google Patents

Abstract

PURPOSE:To improve the air permeability of an exhaust filter by constituting the exhaust filter with a multi-layer filter, providing a core material between layer filters forming the multi-layer filter, and forming many holes communicating the upstream side and the downstream side on the core material. CONSTITUTION:An electrostatic filter 31, a core material 32, a nonwoven fabric filter 33 and an electrostatic filter 34 made of a nonwoven fabric with different METUSUKE (weight of cloth per a specified area) are stacked from the left to constitute a multi-layer filter 22. A porous body 36 is held on a frame body 35 to form the core material 32, and many holes 36a communicating the upstream side and the downstream side are formed into a honeycomb shape on the porous body 36. The frame body 35 and the porous body 36 are made of hard paper such as cardboard, for example. The core material 32 prevents the adherence of the electrostatic filter 31 and he nonwoven fabric 33, the air passing the electrostatic filter 31 is rectified by the porous body 36 of the core material 32 and flows to the nonwoven fabric 33, air permeability is improved, and clogging hardly occurs.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention captures fine dust between an electric blower housed in a vacuum cleaner body and an exhaust port provided at the rear of the vacuum cleaner body. This invention relates to a vacuum cleaner equipped with an exhaust filter that collects air.

[Prior Art] Conventionally, as such a vacuum cleaner, one shown in FIG. 9 is known.

In Fig. 9, 1 is a vacuum cleaner main body, and a dust collection chamber 3 equipped with a dust collection filter 2 is formed inside this main body 1, and the dust collection chamber 3 is set to negative pressure inside the main body 1. electric blower 4
is provided.

When the electric blower 4 operates, the air in the dust collection chamber 3 is sucked and the dust collection chamber 3 becomes a negative pressure, and due to the negative pressure, dust is sucked from a suction tool (not shown) and collected in the dust collection filter 2. go.

The air sucked in by the electric blower 4 is exhausted from an exhaust port 6 provided at the rear of the main body 1 as shown by the arrow.

By the way, there is a problem that the fine dust sucked in by the suction tool (not shown) passes through the dust collection filter 2 and is scattered from the exhaust port 6, so the fine dust that has passed through the dust collection filter 2 is collected. In order to do this, a sub-filter 5 is installed between the dust filter 2 and the electric blower 4, and an exhaust filter 7 is installed between the electric blower 4 and an exhaust port 6 provided at the rear of the main body 1.

As shown in FIG. 10, the exhaust filter 7 is constructed by folding a filter medium 7a made of glass fiber or the like into an accordion shape and attaching it to a frame (not shown) made of resin.

The exhaust filter constructed in this manner has the disadvantage that it becomes expensive because it requires bending of the filter material into an accordion shape. Also,
Since it is difficult to cut a filter medium folded into an accordion shape into an arbitrary shape, there are many problems such as a low degree of freedom in design.

Therefore, multilayer filters that do not require bending and can be cut into any shape have been proposed.

Such a multilayer filter is constructed by stacking several nonwoven fabric filters with different basis weights on top of an electrostatic filter.

[Problems to be Solved by the Invention] However, in such a multilayer filter, since several nonwoven fabric filters are stacked, the nonwoven fabric filters come into close contact with each other, which tends to cause turbulence and poor breathability. . As a result, there was a problem that clogging was likely to occur and the service life was shortened. In addition, if the air permeability is poor, there are also problems such as a decrease in suction power for dust.

This invention has been made in view of the above problems, and an object thereof is to provide a vacuum cleaner that can improve the ventilation of the exhaust filter.

[Means for Solving the Problems] In order to achieve the above object, the present invention prevents fine dust from flowing between an electric blower housed in a vacuum cleaner body and an exhaust port provided in the vacuum cleaner body. A vacuum cleaner equipped with an exhaust filter for collecting exhaust gas.

The exhaust filter is composed of a multilayer filter, a core material is provided between the layer filters forming one layer of the multilayer filter, and the core material has a large number of holes communicating with the upstream side and the downstream side. It is characterized by the fact that it has been formed.

Moreover, the multilayer filter is sandwiched between two core materials having a predetermined thickness, and a large number of holes communicating between the upstream side and the downstream side are formed in the core materials.

[Operation] According to this invention, a core material is provided between the layer filters forming one layer of the multilayer filter, and a large number of holes are formed in this core material, communicating the upstream side and the downstream side. Therefore, the core material prevents the layer filters from coming into close contact with each other, and rectifies the air passing through the multilayer filter to improve ventilation.

Further, according to the present invention, the multilayer filter is sandwiched between two core materials, and a large number of holes communicating between the upstream side and the downstream side are formed in the core materials. rectifies the flow and improves ventilation. Also,
Since the core material holds the multilayer filter, the construction of the exhaust filter can be simplified.

[Example 7] Hereinafter, an example of a vacuum cleaner according to the present invention will be described based on the drawings.

In Fig. 1, 11 is the vacuum cleaner main body, and this main body 1
A dust collection chamber 13 in which a dust collection filter 12 is provided is formed inside the dust collection chamber 1 . Furthermore, an electric blower 14 that makes the dust collection chamber 13 have a negative pressure is provided inside the main body 11. A sub-filter 15 is provided between the dust collection filter 13 and the electric blower 14, and a sub-filter 15 is provided between the electric blower 14 and the rear of the main body 11. An exhaust filter 20 for collecting fine dust is provided between the exhaust port 16 and the exhaust port 16 . 19 is a sealing member.

As shown in FIG. 2, the exhaust filter 20 is composed of a filter holding frame 21 and a multilayer filter 22 held by the filter holding frame 21.The multilayer filter 22 includes, from the left, an electrostatic filter 31 made of nonwoven fabric; A core material 32, a nonwoven fabric filter 33, and an electrostatic filter 34 made of a nonwoven fabric having a basis weight different from that of the nonwoven fabric filter 33 are stacked on top of each other.

As shown in FIG. 3, the core material 32 has a frame 35 holding a porous body 36, and this porous body 36 has an upstream side (right side in FIG. 3) and a downstream side (third side). A large number of holes 36a are formed in a honeycomb shape, communicating with the left side in the figure. The frame body 35 and the porous body 36 are made of hard paper such as cardboard, for example.

Next, the operation of the vacuum cleaner configured as described above will be explained.

When the electric blower 14 operates, air in the dust collection chamber 13 is sucked through the sub-filter 15, thereby creating a negative pressure in the dust collection chamber 13. This negative pressure sucks dust from a suction tool (not shown) and collects it in the dust collection filter 12.

The air sucked by the electric blower 4 is discharged from the exhaust port 16 via the exhaust filter 20 as shown by the arrow.

By the way, the exhaust filter 20 is composed of a multilayer filter 22, and the core material 32 prevents the electrostatic filter 31 and the nonwoven fabric 33 from coming into close contact with each other. Since the flow is rectified by the body 36 and flows to the nonwoven fabric 33, air permeability is improved. Therefore, clogging is less likely to occur, and the exhaust filter 20
's life will be extended. Furthermore, since the air permeability of the exhaust filter 20 is improved, the number of layers of the multilayer filter 22 can be increased, and therefore the effect of collecting fine dust can be increased, and the suction power for dust can also be improved. be able to.

FIG. 4 shows a second embodiment, in which the core material 32 and each filter 31, 33, 34 are arranged alternately to further enhance the rectifying effect.

FIG. 5 shows a third embodiment, in which filters 31, 33, 34 (multilayer filter 4
0) is sandwiched, and the frame body 35 of the core material 32 also serves as a filter holding frame. Therefore, its structure becomes simple. Also in this embodiment, since the core material 32 is placed on both sides of the multilayer filter 40, the air is rectified on both sides, and the air permeability of the exhaust filter 400 is improved.

FIG. 6 shows an example of a method for assembling the multilayer filter 41.
2, a nonwoven fabric filter 33. The core material 32 and the non-woven filter 33 are stacked, the electrostatic filter 42 is bent in the direction of the arrow and stacked on the non-woven filter 33, and an adhesive 44 is applied in advance to the S area of the non-woven filter 33.
As shown in FIGS. 7 and 8, the electrostatic filter 42 is assembled by thermal fusion.

In the multilayer filter 41 assembled in this manner, only the portion A shown in FIGS. 7 and 8 is bonded with the adhesive 44, so that deterioration of air permeability due to the adhesive 44 is prevented.

[Effects] As described above, according to the present invention, the air permeability of the exhaust filter is improved, so the life of the exhaust filter can be extended. Furthermore, the effect of collecting fine dust can be improved, and the suction power for dust can also be improved.

Furthermore, since the multilayer filter is sandwiched and held between two core materials, the configuration of the exhaust filter can be simplified and ventilation can be improved.

[Brief explanation of the drawing]

Fig. 1 is a partial sectional view showing the vacuum cleaner main body according to the present invention, Fig. 2 is a sectional view showing the configuration of the exhaust filter, and Fig. 3 is a sectional view showing the structure of the exhaust filter.
The figure is a perspective view showing the structure of the core material, gJ4 figure and 5th figure.
The figure is a cross-sectional view showing the configuration of an exhaust filter of another embodiment. Figure 6 is a perspective view for explaining the method of assembling the multilayer filter. Figures 7 and 8 are cross-sections showing the cross section of the multilayer filter. Figure 9 is a side view showing the main body of a conventional vacuum cleaner, Figure 10 is a side view showing the main body of a conventional vacuum cleaner.
The figure is a perspective view showing a conventional exhaust filter. 11...Vacuum cleaner body 14...Electric blower 16...Exhaust port 20...Exhaust filter 22...Multilayer filter 31...Electrostatic filter 32...Core material 33...Nonwoven fabric Filter 34... Non-woven filter 36a... Hole Fig. 1/19 Fig. 2 Fig. 3 Fig. 4 Fig. 6 Fig. 7 Fig. 8 Fig. 9 Fig. 10 Song

Claims (2)

[Claims] (1) A vacuum cleaner that is provided with an exhaust filter that collects fine dust between an electric blower housed in the vacuum cleaner body and an exhaust port provided in the vacuum cleaner body, wherein the exhaust filter is composed of a multilayer filter, a core material is provided between the layer filters forming one layer of the multilayer filter, and a large number of holes are formed in the core material to communicate the upstream side and the downstream side. A vacuum cleaner featuring: (2) A vacuum cleaner that is provided with an exhaust filter that collects fine dust between an electric blower housed in the vacuum cleaner body and an exhaust port provided in the vacuum cleaner body, wherein the exhaust filter A vacuum cleaner comprising a multilayer filter, the multilayer filter being sandwiched between two core materials, and a large number of holes communicating between the upstream side and the downstream side formed in the core material.