JPH0260325B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dust collector for a vacuum cleaner, and is intended to prevent deterioration of suction performance due to early clogging of a primary filter that captures coarse dust.

In recent years, there has been a strong demand for vacuum cleaners to be smaller and lighter.In the case of a vacuum cleaner in which the vacuum cleaner body and the dust container are removably connected, there is a need to reduce the size of the dust container. This was difficult due to the relationship with the filter device provided in the dust container. Among these, conventionally, as shown in Figure 1,
It has been considered to reduce the size of the entire dust container 102 by reducing the distance between the filter device 101 and the air intake port 103 of the dust container 102. In this case, a check valve 104 is provided at the intake port 103 for the purpose of preventing the sucked dust from flowing back out.
5, a spherical recess 106 is provided in the primary filter 105 facing the intake port 103 in order to prevent the intake port 103 from being completely opened even when the check valve 104 rotates. ,
The check valve 104 is configured to rotate without touching the primary filter 105, and the intake port 103 can be opened reliably.

In the above configuration, the flow of the sucked air is
As shown by the arrow in the figure, since the flow flows along the spherical recess 106 and not along the upper surface of the primary filter 105, the dust once captured by the primary filter 105 is not blown away by the suction flow, and from this This has the drawback that the primary filter 105 becomes clogged very quickly and the suction performance deteriorates. In order to eliminate the above-mentioned drawbacks, it is possible to increase the overarea of the primary filter 105, but as mentioned above, there is a limit to miniaturization.

The present invention eliminates the drawback of early clogging of the primary filter while promoting downsizing of the dust container.

In order to achieve the above object, the present invention provides a dust container having an inlet, a filter device including a primary filter and a secondary filter provided in the dust container, and a filter device provided in the inlet, with an upper fulcrum as a base point. It is equipped with a valve body that rotates to open and close the intake port,
The surface of the primary filter facing the intake port is set at a substantially right angle to the intake port, and includes an air-impermeable flat plate portion, and a surface above the flat plate portion that has a rotation diameter of the valve body. an impermeable spherical recess formed spaced apart from the fulcrum of the valve body with a spherical radius approximately equal to;
It consists of these flat plate parts and an air-permeable flat plate part around the spherical recess, and furthermore, the lower end of the spherical recess is set to be located above the lower end of the intake port.

According to the above configuration, since the primary filter has a spherical recess that provides relief for the rotation of the valve body, the primary filter can be brought closer to the intake port to make the dust container smaller and more compact. Since it hits the impermeable flat plate part and runs along the filtration surface, it blows away dust that tends to adhere to the filtration surface.

Examples thereof will be described below with reference to the accompanying drawings.

In FIGS. 2 to 5, 1 is a vacuum cleaner main body (hereinafter referred to as the main body) that includes an electric blower 2 and a cord winding device 3, and 4 is detachably connected to the main body 1 via a buckle 5. A front lid 7 having an air intake port 6 formed thereon is fixed to the front surface, and a check valve 8 is sandwiched between the air intake port 6 and the dust storage container 4. The check valve 8 is made of an elastic body such as rubber,
Also, it is composed of a substantially cylindrical frame 9 and a disc-shaped valve 10, and the frame 9 and the valve 10 are integrally connected at the upper part, and the valve 10 is rotatable, and normally closes the intake port 6 by its own weight. There is. Reference numeral 11 denotes a filter device that is detachably attached to the opening of the dust container 4, and includes a secondary filter 12 for capturing fine dust;
The net 1 is detachable from the filter and covers the secondary filter 12 as well as a net 1 for capturing coarse dust.
3, and a primary filter 14 having a filter. Reference numeral 15 denotes a spherical recess provided in the primary filter 14, which is recessed toward the secondary filter 12. Its spherical center is approximately the same as the center of rotation of the valve 10 of the check valve 8, and the rotation center of the valve 10 is The sphere radius is made larger than the dynamic radius so that the valve 10 does not touch when it rotates.

Further, the dust collection side surface of the primary filter 14 is flat, and the lower end of the spherical recess 15 facing the intake port 6 is set to be located above the lower end of the intake port 6. In addition, a portion of the surface of the primary filter 14 corresponding to the spherical recess 15 and the air intake port 6 is made impermeable.

In the above configuration, when the vacuum cleaner is operated, the suction flow causes the check valve 8 to
The valve 10 rotates and becomes approximately horizontal, fully opening the intake port 6. At this time, the valve 10 and the spherical recess 15 of the primary filter 4 do not touch because the spherical radius is larger than the turning radius of the valve 10. When the operation is stopped, the valve 10 returns by its own weight and the air intake port 6 will be occluded.

Next, the sucked suction flow enters from the intake port 6,
Although the airflow collides with the primary filter 14, the airflow that collides with the spherical recess 15 does not flow along the net 13 surface of the primary filter 14 because it follows the spherical recess 15 as shown by arrow a. However, since the lower end of the spherical recess 15 facing the intake port 6 of the primary filter 14 is located above the lower end of the intake port 6, the dust collecting side of the primary filter 14 facing the intake port 6 has a flat surface. The colliding airflow flows downward and toward the sides as shown by arrow b, along the surface of the net 13, and the airflow blows away the coarse dust that has been captured by the net 13. It is. This prevents the net 13 of the primary filter 14 from becoming clogged early, and as shown in the graph of FIG. The amount of dust A that is collected until suction performance deteriorates is about twice that of conventional B. In other words, net 1 of the primary filter 14
The time it takes for No. 3 to become clogged is approximately doubled, and early deterioration of suction performance can be prevented. Note that the primary filter net used in the above comparison was 80 mesh, and the total area of the net was set to 20 cm ² .

In addition, since a part of the surface of the net 13 corresponding to the spherical recess 15 and the air intake port 6 is impermeable, even if a heavy object is sucked in, the net 13 will not be damaged. 1
Since the flow flows along three sides, the blowing effect is further enhanced.

As described above, the present invention provides a primary filter with a spherical recess for escaping the rotation of a check valve, in which the net surface facing the intake port is flat, and the spherical recess is provided above the lower end of the intake port. By locating the lower end of the recess and making a part of the net surface corresponding to the spherical recess and the intake port impermeable,
The suction flow has the effect of blowing off dust from the net surface, and prevents deterioration of suction performance due to early clogging of the primary filter. Further, according to the present invention, even if the amount of suction air is reduced, the dust blowing effect can be effectively exhibited. That is, at this time, the opening degree of the valve body becomes small, and most of the suction air is directed toward the flat portion below the recess and along the net surface. Therefore, in this case as well, there is almost no dust adhering to the net surface.

[Brief explanation of the drawing]

Figure 1 is a partially cutaway sectional view of a conventional vacuum cleaner.
Fig. 2 is a partially cutaway sectional view of a vacuum cleaner showing an embodiment of the present invention, Fig. 3 is a partially cutaway sectional view of the vacuum cleaner in operation, and Fig. 4 is air volume vs. suction dust. A characteristic diagram showing the relationship between quantities, FIG. 5 is a perspective view of the primary filter. 4...dust collection container, 6...intake port, 10...valve,
11... Filter device, 12... Secondary filter, 14... Primary filter, 15... Spherical recess.

Claims (1)

[Claims] 1. A dust container having an intake port, a filter device consisting of a primary filter and a secondary filter provided on the dust container, and a filter device provided at the intake port that rotates about an upper fulcrum to open the intake port. The surface of the primary filter facing the intake port is set substantially perpendicular to the intake port, and includes an impermeable flat plate portion and a valve body located above the flat plate portion. It consists of an impermeable spherical recess formed at a distance from the fulcrum of the valve element with a spherical radius approximately equal to the rotation diameter of the valve element, and an air permeable flat plate area around these flat plate parts and the spherical recess, and further A dust collector for a vacuum cleaner in which the lower end of the front balloon-shaped recess is located above the lower end of the air intake port.