CN101309624B - electric vacuum cleaner - Google Patents

Abstract

The invention provides an electric dust collector which can ensure high suction power and is not easy to reduce suction force even though dust is sucked. The dust collecting box for introducing air containing dust sucked by the electric blower is cylindrical, and has a suction port for introducing air containing dust from a tangential direction and a dust storage part located at the other end of the suction port, and a dust removing filter in the dust collecting box is arranged in an air duct communicating the dust collecting box and the electric blower. Thus, the dust is continuously rotated in the dust box by the swirling air flow in the dust box, and even if the dust is attached to the dust removing filter, the dust can be peeled off from the dust removing filter, and an air intake path can be always ensured.

Description

electric vacuum cleaner

technical field

The present invention relates to an electric vacuum cleaner using a reusable dust box.

Background technique

All the time, as this electric vacuum cleaner, known following structure: promptly produce special-purpose cyclone airflow in dust box, utilize the airflow after the suction and separate dust with centrifugal force, thereby dust is accumulated in dust box (for example, refer to patent Document 1: Japanese Patent Application Laid-Open No. 2000-342492).

But, in above-mentioned existing structure, although produce cyclone air-flow in dust box, utilize the air-flow after the suction and separate dust with centrifugal force, thereby dust is piled up in dust box, but most are due to being guaranteed higher suction power However, it becomes a mechanism that cannot sufficiently centrifuge dust. Therefore, if dust is accumulated in the dust box, the accumulated dust itself acts as a filter, so fine dust is also attached to the accumulation of coarse dust, which constitutes ventilation resistance, and there is a problem that the suction force drops sharply. In addition, in order to generate whirlwind airflow, it is necessary to increase the curved suction path, and because swirling airflow also occurs during suction, the pressure loss in the path from suction to exhaust in the dust box increases, and the suction power becomes lower. The problem.

Contents of the invention

The present invention solves the above-mentioned problems of the prior art, and provides an electric vacuum cleaner which can secure a high suction power and which does not easily lower the suction power even if dust is sucked.

In order to solve the problems of the prior art, the electric vacuum cleaner of the present invention is provided with: an electric blower, a dust separation part that is arranged on the upstream side of the electric blower and introduces the air of the dust sucked by the electric blower, and stores the dust separated by the dust separation part. The dust storage part of the dust; the dust separation part is provided with a swirling air flow passage that flows the air containing the dust introduced from the suction port as a swirling air flow, and is equipped with a dust removal filter that forms at least a part of the swirling air flow passage. The outer periphery of the dust filter acts as a space for the suction of the electric blower.

According to this invention, when the air containing dust flows into the dust separation part, a swirling airflow is generated in the dust separation part. Here, the inflowing dust containing swirling components also rotates in the cylindrical hollow part of the dust removal filter, and coarse dust such as cotton dust or hair descends while rotating in the cylindrical hollow part of the dust removal filter, and is introduced into the dust. storage department.

In addition, in the cylindrical hollow part of the dust removal filter, even if dust adheres to the inner surface, it is peeled off by the swirling air flow, so dust does not accumulate in the dust removal filter, and air permeability can be ensured. That is, even if dust is sucked, it is ensured that the dust is deposited in the dust storage part, and the suction path from the suction port to the electric blower extends around the dust filter. Accordingly, it is possible to obtain an electric vacuum cleaner that does not cause a decrease in the air volume, has excellent air volume maintenance performance, and does not require maintenance for a long period of time.

In addition, the electric vacuum cleaner of the present invention does not need to repeatedly and sharply bend or expand and contract the airflow in the air passage from the suction port to the electric blower to separate dust from the air passage, so a high suction power can be ensured for a long time.

Therefore, the present invention can provide an electric vacuum cleaner of the type that ensures high suction power, does not easily decrease suction power even if dust is sucked, and does not require maintenance for a long period of time.

Description of drawings

FIG. 1 is an overall view of an electric vacuum cleaner according to Embodiment 1 of the present invention.

Fig. 2 is a cross-sectional view showing the structure of the main body of the electric vacuum cleaner.

Fig. 3A is a front sectional view of the dust collecting box of the electric dust washer.

Fig. 3B is a side sectional view of the dust box.

Fig. 3C is a cross-sectional view along line A-A of Fig. 3B.

Fig. 3D is a B-B sectional view of Fig. 3B.

Fig. 4 is a sectional view of main parts of a second dust filter of the electric vacuum cleaner.

Fig. 5A is a plan sectional view showing the flow of air in the vicinity of the suction port of the dust box of the electric dust washer.

Fig. 5B is a plan sectional view showing the flow of air in the vicinity of the dust filter of the dust box.

Fig. 5C is a longitudinal sectional view showing the vertical air flow of the dust box.

6 is a graph showing the relationship between the amount of house dust collected and the change in the suction air volume of the electric vacuum cleaner and a comparative example.

Fig. 7 is a perspective view of another dust box of the electric vacuum cleaner.

Fig. 8A is a side sectional view of another dust box of the electric vacuum cleaner.

Fig. 8B is a cross-sectional view along line B-B of Fig. 8A.

Fig. 9A is a front sectional view of another dust box of the electric vacuum cleaner.

Fig. 9B is a cross-sectional view along line B-B of Fig. 9A.

Fig. 10 is a cross-sectional view showing the structure of a main part of an electric vacuum cleaner according to Embodiment 2 of the present invention.

Fig. 11A is a front sectional view of the dust collecting box of the electric dust washer.

Fig. 11B is a side sectional view of the dust box.

Fig. 11C is a sectional view along A-A of Fig. 11B.

Fig. 11D is a B-B sectional view of Fig. 11B.

Fig. 12A is a plan sectional view showing the flow of air in the vicinity of the suction port of the dust box of the electric dust washer.

Fig. 12B is a plan sectional view showing the flow of air in the vicinity of the dust filter of the dust box.

Fig. 12C is a longitudinal sectional view showing the vertical air flow of the dust box.

FIG. 13 is a graph showing the relationship between the electric vacuum cleaner and the household dust collection amount and the change in the intake air volume in Embodiment 1. FIG.

14 is a sectional view of main parts showing the configuration of a drive gear of the electric vacuum cleaner according to Embodiment 3 of the present invention.

15 is a graph showing the relationship between the electric vacuum cleaner and the household dust collection amount and the change in the intake air volume in the second embodiment.

Fig. 16A is a side sectional view of a dust box according to Embodiment 4 of the present invention.

Fig. 16B is a B-B sectional view of Fig. 16A.

Fig. 17 is a sectional view of main parts showing the operation of the first dust removing mechanism of the electric vacuum cleaner.

Fig. 18 is a perspective view of a dust box provided with a first dust removing mechanism of another embodiment of the electric vacuum cleaner.

Fig. 19A is a side sectional view of a dust box according to Embodiment 5 of the present invention.

Fig. 19B is a B-B sectional view of Fig. 19A.

Fig. 20 is a sectional view of main parts showing the operation of the second dust removing mechanism of the electric vacuum cleaner.

21 is a graph showing the relationship between the electric vacuum cleaner and the household dust collection amount and the change in the intake air volume in the second embodiment.

Fig. 22 is a side sectional view of a dust collecting box of an electric vacuum cleaner according to Embodiment 6 of the present invention.

Fig. 23 is a sectional view of main parts showing the operation of the third dust removing mechanism of the electric vacuum cleaner.

Fig. 24 is a perspective view of a dust box provided with a third dust removing mechanism of another embodiment of the electric vacuum cleaner.

25 is a perspective view of a dust collecting box of an electric vacuum cleaner according to Embodiment 7 of the present invention.

Fig. 26 is a sectional view of main parts showing the operation of the fourth dust removing mechanism of the electric vacuum cleaner.

27 is a graph showing the relationship between the electric vacuum cleaner and the household dust collection amount and the change in the intake air volume in the second embodiment.

Fig. 28 is a perspective view of a dust collecting box of an electric vacuum cleaner according to Embodiment 8 of the present invention.

Fig. 29A is a side sectional view showing a state in which dust is accumulated in the dust collecting box of the electric vacuum cleaner.

Fig. 29B is a side cross-sectional view showing a state in which the dust box is opened to discharge dust.

30 is a perspective view of a dust collecting box of an electric vacuum cleaner according to Embodiment 9 of the present invention.

Fig. 31A is a side sectional view showing a state in which dust is accumulated in the dust collecting box of the electric vacuum cleaner.

Fig. 31B is a side cross-sectional view showing a state in which the dust box is opened to discharge dust.

Fig. 32A is a side sectional view of the dust box according to Embodiment 10 of the present invention.

Fig. 32B is a B-B sectional view of Fig. 32A.

Fig. 33 is a perspective view of the dust collecting box of the electric vacuum cleaner.

Symbol Description

1-vacuum cleaner main body; 5-dust box; 6-suction port; 21-electric blower; 22a-upper box;

22b-box central part; 23-dust separation part; 24-dust storage part; 27-dust filter;

27a-the first dust removal filter; 27b-the second dust removal filter; 28-the third dust removal filter;

29a-first air duct (main air duct); 29b-second air duct (secondary air duct); 31-open and close cover;

33-space part; 41-pleated filter; 42-recess; 43-sealing part; 51-fine dust;

52-coarse dust; 161-the first dust removal mechanism; 191-the second dust removal mechanism;

221-the third dust removal mechanism; 251-cylindrical basket (the fourth dust removal mechanism);

324 - Fourth dust filter.

Detailed ways

The electric vacuum cleaner of the present invention is provided with: an electric blower, a dust separation unit that is installed on the upstream side of the electric blower and introduces air containing dust sucked by the electric blower, and a dust storage unit that stores the dust separated by the dust separation unit. ; The dust separation part is provided with a swirling air flow channel that will contain the air of the dust introduced from the suction port as a swirling air flow, and is equipped with a dust filter that forms at least a part of the swirl air flow channel, and is provided with a suction of the electric blower. Force acts on the outer peripheral space of the dust filter.

According to the present invention, when air containing dust flows into the dust separation unit, a swirling airflow is generated in the dust separation unit. Here, the inflowing dust containing swirling components also rotates in the cylindrical hollow part of the dust removal filter, and coarse dust such as cotton dust or hair descends while rotating in the cylindrical hollow part of the dust removal filter, and is introduced into the dust storage. department.

In addition, in the hollow part of the cylinder in the dust removal filter, the swirling air flow removes dust even if it adheres to the inner surface, so dust does not accumulate in the dust removal filter, and air permeability can be ensured. That is, even if dust is sucked, it is ensured that the dust is deposited in the dust storage part, and the suction path from the suction port to the electric blower extends around the dust filter. Accordingly, it is possible to obtain an electric vacuum cleaner that does not cause a decrease in the air volume, has excellent air volume maintenance performance, and does not require maintenance for a long period of time.

In addition, the electric vacuum cleaner of the present invention separates dust from the air passage without repeatedly sharply bending or expanding and contracting the airflow in the air passage from the suction port to the electric blower, so that a high suction power can be ensured for a long time.

In addition, the present invention is particularly an electric vacuum cleaner in which a dust filter is provided over the entire circumference of the swirling air duct.

According to this invention, since the suction path from the suction port to the electric blower is ensured throughout the entire circumference of the dust filter, it can be realized as an electric vacuum cleaner that does not further reduce the air volume, has excellent air volume maintenance performance, and does not require maintenance for a long time. .

Moreover, this invention is especially the electric vacuum cleaner which provided the dust storage part under the dust filter.

According to this invention, coarse dust such as cotton dust and hair descends while rotating in the cylindrical hollow part in the dust filter, and can be more efficiently introduced into the dust storage part.

In addition, the present invention is particularly an electric vacuum cleaner in which the swirling air passage is substantially cylindrical, and the suction port is configured in a direction tangential to the substantially cylindrical cylinder of the swirling air passage.

According to such an invention, when the air containing dust flows into the dust separation part, since it flows in from the tangential direction thereof, the swirling airflow can be generated more powerfully in the dust separation part.

In addition, the present invention is particularly an electric vacuum cleaner in which the suction force of the electric blower acts on the main air duct on the outer periphery of the dust filter in the space provided on the outer periphery of the dust filter.

According to this invention, the suction path from the suction port to the electric blower can be ensured more effectively throughout the surroundings of the dust removal filter, the air volume will not be further reduced, the air volume maintenance performance is excellent, and the electric blower fan does not require maintenance for a long time. Vacuum cleaner.

In addition, the present invention is particularly an electric vacuum cleaner provided with a sub-air duct in which the suction force of the electric blower acts on the dust storage section.

According to this invention, since the cylindrical hollow part in the dust removal filter descends while rotating, and the coarse dust introduced into the dust storage part is attracted by the auxiliary air duct, it is more reliably captured and accumulated in the dust storage part. Ministry. Furthermore, it is possible to provide an electric vacuum cleaner capable of preventing re-attachment to the dust filter due to dust being rolled up during operation, suppressing a decrease in air volume, and having excellent air volume maintenance performance.

In addition, the present invention is particularly an electric vacuum cleaner in which the auxiliary air duct communicates with the outside of the dust removal filter from the dust storage part through the dust removal filter.

According to this invention, since the cylindrical hollow part in the dust removal filter falls while rotating, and the coarse dust introduced into the dust storage part is sucked through the auxiliary air duct, and filtered by the dust removal filter, it can be further improved. Reliably captured and accumulated in the dust storage department. In addition, it can be made into an electric vacuum cleaner that can reliably capture and accumulate dust in the dust storage part, ensure air volume maintenance performance, and require no maintenance for a long time.

In addition, the present invention is especially an electric vacuum cleaner provided with a third dust removal filter on the secondary air duct.

According to this invention, since the cylindrical hollow part in the dust removal filter descends while rotating, and the coarse dust introduced into the dust storage part is attracted to the direction of the third dust removal filter through the secondary air duct and filtered, Therefore, it can be more reliably captured and accumulated in the dust storage part. In addition, the fine dust that has passed through the third dust removal filter is also filtered by the dust removal filter, and is removed in the middle of reaching the air duct on the side of the electric blower.

Therefore, the coarse dust and the fine dust are more reliably separated, the coarse dust is reliably captured and accumulated in the dust storage part, and the air volume maintenance performance is ensured, so that the electric vacuum cleaner does not require maintenance for a long time.

In addition, the present invention, in particular, the dust filter at least includes: a first dust filter that captures coarse dust on the upstream side relative to the suction air flow; and a second dust filter that captures fine dust on the downstream side on the outer periphery of the first dust filter electric vacuum cleaner.

According to this invention, coarse dust such as cotton dust, hair, and food scraps can be removed by the first dust removal filter on the upstream side, and fine dust such as sand can be removed by the second dust removal filter on the downstream side. Therefore, especially the cotton dust which tends to become the resistance of the air passage can be captured on the upstream side, and can be rotated in the dust box, and the reduction of the suction force can be further effectively prevented.

In addition, the present invention is particularly an electric vacuum cleaner provided with a sub-air duct in which the suction force of the electric blower acts on the dust storage section.

According to this invention, since the cylindrical hollow part in the dust removal filter is rotated and descends, and the coarse dust introduced into the dust storage part is attracted by the secondary air duct and filtered by the dust removal filter, it is more reliable. are captured and deposited in the dust depository. Therefore, it is possible to obtain an electric vacuum cleaner in which dust is reliably captured and accumulated in the dust storage portion, air volume maintenance performance is ensured, and maintenance is not required for a long period of time. In addition, it is possible to provide an electric vacuum cleaner capable of preventing re-adhesion to the dust filter due to dust being rolled up during operation, suppressing a decrease in air volume, and having excellent air volume maintenance performance.

In addition, the present invention is particularly an electric vacuum cleaner having a main air duct and an auxiliary air duct, that is, the main air duct is from the swirling air flow duct to the outer periphery of the dust separation part via the first dust removal filter and the second dust removal filter, The auxiliary air passage is from the dust storage part to the outer periphery of the dust separation part via the third dust removal filter and the second dust removal filter.

According to this invention, coarse dust such as cotton dust and hair descends while rotating in the cylindrical hollow part in the first dust removal filter, and is introduced into the dust storage part. It is filtered in the direction attracted to the third dust filter, so it is more reliably captured and accumulated in the dust storage part. The fine dust that has passed through the third dust removal filter flows in from the lower end of the second dust removal filter, is filtered by the second dust removal filter, and is removed through the air duct leading to the electric blower side.

Thereby, coarse dust and fine dust are more reliably separated, and coarse dust is reliably captured and accumulated in the dust storage part. Therefore, it is possible to make an electric vacuum cleaner that can further ensure air volume maintenance performance and require no maintenance for a long period of time.

In addition, the present invention is especially an electric vacuum cleaner in which the third dust filter traps coarse dust.

According to this invention, when the coarse dust introduced into the dust storage part is attracted to the end of the second dust filter by the third dust filter, the coarse dust such as cotton dust and hair is not allowed to pass through the third dust filter. Through, coarse dust and fine dust are separated. Therefore, coarse dust such as cotton dust and hair, which become a large air passage resistance, can be reliably captured in the dust storage portion, and a reduction in the air volume can be prevented more effectively.

In addition, the present invention is particularly an electric vacuum cleaner in which the first dust removal filter includes at least any one of punched metal, metal mesh, and resin mesh.

According to this invention, even when fibrous dust such as cotton dust among the dust flowing into the cylindrical dust collecting box rotates in the dust collecting box, compared with the mesh-shaped dust removing filter, The surface is smooth without fine bumps, so the fibrous dust is not easily entangled, and it is easy to carry out continuous rotation in the dust box, and can be captured and accumulated in the dust storage part.

Moreover, in this invention, especially, the 2nd dust removal filter is a cylindrical shape, and the electric vacuum cleaner which made the pleat-shaped member circular.

According to this invention, the area of the filter can be increased by making it into a pleated shape, the ventilation resistance can be reduced, and high suction efficiency can be maintained and ensured for a long time.

In addition, the present invention is particularly an electric vacuum cleaner in which the inner surface of the pleat-shaped member is approximately U-shaped and has a roundness in the cylindrical outer peripheral portion of the second dust removal filter.

According to this invention, fine dust is less likely to adhere to and accumulate in the second dust removal filter due to the rounded concave portion, and once adhered fine dust is easily peeled off and removed, further preventing air volume reduction.

In addition, the present invention is especially an electric vacuum cleaner with a rotating dust filter.

According to such an invention, it is possible to prevent the somewhat uneven distribution of dust adhesion on the dust filter, to achieve uniformity of the amount of dust adhesion, and to effectively prevent reduction in air volume due to clogging of the filter mesh.

Moreover, this invention is especially the electric vacuum cleaner which has a rotating structure at least one of a 1st dust removal filter or a 2nd dust removal filter.

According to such an invention, it is possible to prevent the dust adhesion distribution of the first dust removal filter or the second dust removal filter from being somewhat uneven, to achieve uniformity of the amount of dust adhesion, and to further effectively prevent a decrease in the air volume.

Moreover, this invention is especially the electric vacuum cleaner which rotates interlockingly with a 1st dust removal filter and a 2nd dust removal filter.

According to this invention, the degree of inhomogeneity in the dust adhesion distribution of both the first dust removal filter and the second dust removal filter can be prevented, and the uniformity of the dust adhesion amount can be realized, and it can be realized more effectively with a simple structure. Prevents reduction in air volume due to clogged filter screens.

Moreover, this invention is especially the electric vacuum cleaner provided with the dust removal mechanism which removes the dust adhering to the dust removal filter.

According to such an invention, it is possible to remove fine dust such as sand and dust adhering to the dust removal filter, further prevent the mesh of the dust removal filter from being clogged, and further prevent a decrease in the air volume.

Moreover, this invention is especially the electric vacuum cleaner provided with the dust removal mechanism which contacts the rotating dust filter.

According to this invention, the dust adhering to the inner surface of the dust filter can be removed all around. In addition, it has a simple structure that can be rotated freely by hand, a rotation drive mechanism and a control mechanism, and a structure that can be rotated in conjunction with the operation or stop timing of the electric blower, etc., can more effectively ensure the air permeability of the dust filter, and can Prevent the air volume from decreasing.

In addition, the present invention is particularly an electric vacuum cleaner having a dust removal mechanism in contact with at least one of the rotating first dust removal filter and the second dust removal filter, and the dust removal mechanism vibrates the contacted dust removal filter. And remove the attached dust.

According to such an invention, since the dust adhered to and deposited on the inner periphery of the first dust removal filter or the second dust removal filter can be detached and peeled off more effectively, it is possible to further effectively prevent the decrease in the air volume.

In addition, the present invention is particularly an electric vacuum cleaner having a dust removal mechanism in contact with at least one of the first dust removal filter and the second dust removal filter, and the dust removal mechanism scrapes or wipes off the attached dust in contact with it. The dust on the dust filter is removed.

According to such an invention, it is possible to more effectively remove cotton dust, hairs, fibers, etc. that adhere to the inner surface of the first dust removal filter or the second dust removal filter and cause clogging or entanglement of the screen.

In addition, the present invention is particularly an electric vacuum cleaner in which the dust removal mechanism vibrates the dust adhering to the dust filter by moving while contacting the dust filter, or removes the dust by scraping or wiping.

According to such an invention, the dust adhering to the inner surface of the dust filter can be easily removed all around. In addition, it has a simple structure that can be rotated freely by hand, a rotation drive mechanism and a control mechanism, and a structure that can be rotated in conjunction with the operation or stop timing of the electric blower, etc., can more effectively ensure the air permeability of the dust filter. Prevents reduction in air volume.

Moreover, in this invention, especially the 3rd dust removal filter is the electric vacuum cleaner of the shape of the truncated cone which opened up and down and whose diameter of a lower part is larger than a diameter of an upper part.

According to such an invention, the fine dust peeled off and removed from the third dust filter falls reliably into the lower dust storage portion along the slope formed by the truncated conical generatrix. Thereby, dust can be prevented from adhering to the third dust removal filter again, and a decrease in air volume can be further prevented.

In addition, the present invention is particularly an electric vacuum cleaner in which the dust filter is in the shape of a truncated cone whose lower diameter is larger than the upper diameter.

According to this invention, even if the dust is sucked more than the amount of dust that can be stored in the dust storage part, the dust will clog the hollow of the cylinder of the dust filter. Since the lower part is larger than the upper part, it can be easily peeled off from the dust filter and removed. An electric vacuum cleaner with excellent dust removal performance and convenience.

In addition, the present invention is particularly an electric vacuum cleaner in which an opening is provided on a part of the third dust removal filter, a dust removal mechanism is provided near the opening, and a dust storage part is provided with a filter communicating with the opening. A dust chamber in which the dust removed by the dust removing mechanism is stored through the opening.

According to such an invention, it is possible to prevent re-attachment to the dust filter due to the dust being rolled up during operation, and it is possible to further suppress the decrease in the air volume and provide an electric vacuum cleaner with excellent air volume maintenance performance.

In addition, the present invention is particularly an electric vacuum cleaner in which a vent communicating with the dust storage portion is provided on the side wall of the dust chamber, and a fourth dust filter is provided in the vent.

According to this invention, the air passage from the dust storage part through the fourth dust filter to the dust chamber and then to the outer periphery of the dust filter can be ensured. Even if dust is attracted, the suction air volume is not easy to decrease, and a high suction power.

In addition, the present invention is particularly an electric vacuum cleaner that discharges dust by opening the bottom of the dust storage.

According to such an invention, it is possible to provide an electric vacuum cleaner in which the fine dust or coarse dust accumulated in the dust storage part falls due to gravity, the dust in the dust storage part can be easily discharged, and the dust throwing performance and convenience are excellent.

In addition, the present invention is particularly an electric vacuum cleaner in which at least one part of the dust separation unit or the dust storage unit is made of a transparent material.

According to this invention, it is possible to visually confirm the state of the rotation of the dust and the amount of dust collected, to judge when to throw the dust out of the dust box, and to detect abnormalities in the dust collection unit early.

Moreover, this invention is especially the electric vacuum cleaner in which at least a part of a dust filter is formed from a transparent material.

According to such an invention, since the state of the dust content can be visually confirmed, even if an object other than dust is sucked by mistake during cleaning work, it can be easily found.

If the structure of the electric vacuum cleaner of the present invention is more specifically described, it is provided with: a suction tool for sucking dust on surfaces to be cleaned such as the floor; an electric blower for sucking air containing dust from the above-mentioned suction tool; An electric vacuum cleaner main body; a dust separation unit that introduces air containing dust sucked by the electric blower and separates the dust from the air; and a dust storage unit that stores the dust separated by the dust separation unit. The dust separation unit is configured to have: a suction port for introducing the air containing dust from the suction tool; a swirling air flow channel through which the air containing the dust introduced from the suction port flows as a swirling air flow; A part of the dust removal filter that separates dust and air covers the outer periphery of the dust removal filter, and the suction force of the electric blower acts from the outer peripheral side of the dust removal filter by using the main air duct connected to the suction side of the electric blower.

In order to generate the swirling air flow, the swirling air flow passage is made into a substantially cylindrical shape, preferably cylindrical, and a suction port for the swirling air flow is formed on the inner wall surface of the swirling air flow passage along the circumferential direction. That is, the suction direction of the suction port is a direction perpendicular to the axial direction of the cylindrical shape and a tangential direction of the cylindrical shape so as to flow along the circumferential direction of the inner wall surface. The so-called substantially cylindrical shape includes a polygonal shape such as an ellipse or an octagon in the cross-sectional shape of a plane perpendicular to the axial direction. What is important is that as long as the swirling airflow along the inner wall surface of the swirling airflow duct occurs in the circumferential direction The shape will do.

In addition, in order to generate swirling airflow in the swirling airflow duct, it is of course necessary to generate a negative pressure state by acting on the swirling airflow duct by the suction force of the electric blower. Thus, the top of the dust box is used to cover one end of the suction opening of the substantially cylindrical swirling airflow ventilation part, and the other end is airtightly connected to the dust storage part. The device part can act on the attraction of the electric blower.

As a more preferable manner, the secondary air duct acting as the suction force of the electric blower may be connected to the connecting portion between the swirling air duct and the dust storage part or the dust storage part itself. With this structure, not only the suction force of the dust removal filter part but also the suction force closer to the dust storage part can be obtained, and the dust passing through the dust removal filter can move to the dust storage part more easily.

Even if one end of the secondary air duct is connected to a part of the dust storage part, the other end is connected to the suction side of the electric blower or the other end is connected to a part of the main air duct already formed, the same effect can be obtained. It is preferable to install a third dust filter on one end side of the auxiliary air duct so that the dust accumulated in the dust storage part does not flow into the electric blower side. In particular, in order to make the suction force of the electric blower act on the side of the dust storage part through the secondary air duct, it is preferable that the third dust removal filter adopts a structure that the screen mesh is not easy to be clogged.

Therefore, by making the third dust removal filter a filter for collecting coarse dust, the mesh is less likely to be clogged and can withstand long-term use. On the other hand, since it is made into a coarse dust filter, fine dust may flow into the auxiliary air duct, so if it directly enters the suction side of the electric blower, the durability of the electric blower will decrease. Therefore, when the third dust filter is used as a coarse dust filter, it is necessary to install a fine dust filter upstream of the suction side of the electric blower.

Regarding the fine dust filter, if the dust removal filter located in the main air passage is used as a fine dust filter, as a method of connecting the auxiliary air passage to the main air passage, the fine dust filter located in the dust removal filter can be listed. The secondary air duct is connected to the main air duct on the upstream side. With this connection, fine dust can be captured from the sub-air duct by the fine dust filter constituting the dust filter. In addition, this connection method eliminates the need for a separately prepared fine dust filter dedicated to the auxiliary air duct, and improves the maintainability of the fine dust filter.

In addition, in the above-mentioned specific vacuum cleaner, although the dust filter installed in the dust separation part has the effect of purifying itself by the swirling airflow, it cannot completely suppress the dust caused by dust due to the structure of suction from the outer periphery of the dust filter. The screen is clogged. For this reason, a dust removal mechanism for removing the dust that clogs the dust filter is provided, and the dust removal mechanism is activated when the vacuum cleaner starts to operate, when the operation ends, etc., to remove the dust that clogs the dust filter without causing the suction It can be used for a long time because the force and suction power are reduced.

The timing at which the dust removal mechanism (also referred to as dust removal mechanism) is activated is preferably set in such a way that, during cleaning in actual use, it is studied to what extent the screen clogging occurs in the dust removal filter, which is consistent with the desired The structure of the designed dust separation unit and the type and method of the dust filter used are set in accordance with each other. Specifically, the dust removal mechanism is activated for a certain period of time when the operation is started, the dust removal mechanism is activated for a certain period of time when the operation is completed, and the dust removal mechanism is activated for a certain period of time both when the operation is started and when the operation is completed. In order to operate the dust removal mechanism at such a timing, it is preferable to use a motor.

For example, the on-off control of the motor can be easily realized by using a microcomputer. As part of a series of operations of the control unit (generally realized by a microcomputer) that manages the overall operation control of the vacuum cleaner, the motor control of the dust removal mechanism can be easily incorporated.

In addition to using the above-mentioned electric motors for the control of the dust removal mechanism, it is also conceivable to utilize the electric wire winding mechanism contained in the electric vacuum cleaner. That is, when the user pulls out the power cord wound on the wire winding mechanism for starting operation, the wire winding part of the wire winding mechanism is rotated by its pulling force. mechanism, the dust removal mechanism is activated when the operation starts. In addition, generally, a coil spring is installed in the wire winding mechanism, and when the power cord is pulled out, the wire winding part of the wire winding mechanism rotates, and the built-in coil spring is wound up. In addition, in order to wind up the electric wire at the end of the operation, when the winding button of the electric wire winding mechanism is pressed (generally, it is arranged so that a part of the main body of the electric vacuum cleaner can be pressed), the electric wire is wound up by the force of the wound coil spring. Rotate in the direction of winding the power cord to wind the power cord. If the rotational force of the electric wire winding portion at this time is transmitted to the dust removal mechanism, the dust removal mechanism can be activated at the end of the operation.

In this way, the method of actuating the dust removal mechanism can be appropriately selected, but when the dust removal mechanism is actuated at least when the operation of the electric vacuum cleaner starts and ends, the sieve of the dust filter can be eliminated during each operation of cleaning. The net is blocked, and the initial suction and suction power performance can be maintained every time the sweeping operation is performed. And by adopting the above-mentioned dust removal mechanism in the structure that acts on the outer peripheral side of the dust filter by the suction force, that is, the structure that can suppress the screen clogging of the dust filter by its own purification action, the screen clogging will not occur for a long time. Occurrence, no maintenance can be required for a long time. In addition, the operation time of the dust removal mechanism can be shortened, which is equivalent to the operation time that the screen is not easily clogged. In the structure of the dust removal mechanism driven by a motor, even when the operation of the electric vacuum cleaner is started and the operation is ended, the operation time of the electric vacuum cleaner will be reduced. It does not take much effort for the user to transition to the cleaning action or tidy up after cleaning, and the convenience of use is good.

Embodiments of the present invention will be described below.

Embodiment 1

1 and 2 show an electric vacuum cleaner according to Embodiment 1 of the present invention.

As shown in FIG. 2 , the electric vacuum cleaner main body 1 is equipped with an electric blower 21 that generates suction airflow. In addition, wheels 3 and casters 4 are installed outside the electric vacuum cleaner main body 1 to move freely on the ground. Furthermore, on the upstream side of the electric blower 21, there is provided a dust collecting box 5 that can be freely attached to and detached from the main body 1 of the electric vacuum cleaner through a partition wall 26 having air permeability. Dusty air.

In addition, the dust collecting box 5 is composed of a plurality of hollow cylinders with different diameters connected into a multi-stage shape. In the first embodiment, it is a three-stage structure, and includes the box upper part 22a, the box central part 22b, and the dust collector in order from the upper stage. Storage section 24. The case upper part 22a and the case central part 22b are used as the dust separating part 23, and the case upper part 22a has a suction port 6 for introducing dust-containing air from a tangential direction.

The dust collecting box 5 is communicated with the dust storage part 24 of the accumulation dust of the lowermost stage from the suction port 6, and the air passage from the suction port 6 to the electric blower 21 utilizes the opening 25 and the electric motor that are arranged on the dust separating part 23 of the dust collecting box 5. The partition wall 26 of the cleaner 1 is formed in communication. In addition, the dust separation unit 23 is provided with a cylindrical dust filter 27 .

In addition, as shown in Figure 1, a suction hose 7 and an extension pipe 8 are sequentially connected to the suction port 6, and a paid west entry tool 9 is installed on the front end of the extension pipe 8. dust.

In Embodiment 1, the cylindrical dust filter 27 has a two-layer structure, that is, a cylindrical first dust filter 27a formed of a coarse dust filter on the upstream side and a cylindrical first dust filter 27a provided on the upstream side. The cylindrical second dust removal filter 27b is constituted by fine dust filters on the outer periphery on the downstream side of the first dust removal filter.

The ventilation parts of the first dust filter 27a and the second dust filter 27b are arranged in the middle of the main air duct 29a as the first air duct connecting the suction port 6 of the dust box 5 and the electric blower 21 .

Moreover, the main air duct 29a from the suction port 6 to the electric blower 21 is provided in the whole space circumference from the inside of the 1st dust removal filter 27a to the outer periphery of the 2nd dust removal filter 27b.

Next, the details of the dust box 5 and the cylindrical dust filter 27 will be described with reference to FIGS. 3A , 3B, 3C, and 3D.

As shown in FIG. 3A, the dust collecting box 5 is a shape in which vertical hollow cylinders are connected into three sections, and the suction port 6 is arranged at an eccentric position as shown in FIG. direction inflow. In Embodiment 1, although the dust collecting box 5 is made into a hollow cylinder, the cylinder is not limited to a perfect circle, and may also be a polygonal shape such as an ellipse, an octagon or a decagon, etc., as long as it is formed by suction. The airflow flowing in from the port 6 in the tangential direction can generate a swirling airflow along the inner surface of the dust box 5 . In addition, the cylindrical dust filter 27 is also the same, and the cylinder is not limited to a perfect circle, and it can also be a polygonal shape such as an ellipse, an octagon, or a decagon, etc., as long as it is produced along the inner surface of the above-mentioned dust box 5. The swirling airflow may be generated in the cylindrical hollow portion of the first dust removal filter 27a.

Therefore, the channel that forms the swirling airflow that occurs along the inner surface of the box upper part 22a of the dust separating part 23 and the swirling airflow that occurs in the cylindrical hollow part of the first dust removal filter 27a is used as a swirling airflow passage.

In addition, in order to make the swirling air flow that has occurred in the direction of the dust storage part 24, the arrangement of the suction port 6 on the box top 22a is such that the lower end of the suction port 6 is located at a lower position than the upper end of the opening 25 of the dust separation part 23. Configure as above. In this way, by making the arrangement position of the suction port 6 higher than the opening portion 25, the air introduced from the tangential direction of the box upper portion 22a through the suction port 6 will flow downward under the suction force of the opening portion 25 side, that is, the dust storage portion 24. direction of swirling airflow occurs. Coarse dust 52 , such as cotton dust, is rotated and descended by the wind pressure by the continuation of the swirling and descending swirling airflow, and is introduced into the dust storage unit 24 .

The bottom of dust collecting box 5 is provided with the dust storage part 24 that makes the dust accumulation of sucking, again, the bottom surface of dust collecting box 5 of dust storage part 24 side is used as opening and closing cover 31, and its structure is to open and close by hinge 32. Closing the cover 31 can discharge the dust in the dust storage part 24 .

In Embodiment 1, the dust box 5 is made of acrylic resin, but it is preferable to make at least a part of it a transparent material because the amount of dust inside can be easily visually confirmed from above or the like. As the transparent material, ABS, polypropylene, acrylic resin, etc. are readily available as materials, and are preferable because of good processability.

In addition, as shown in Figure 3B, a space portion 33 is formed on the inner wall between the suction port 6 of the cylindrical dust collecting box 5 and the dust storage portion 24, and the space portion 33 is provided through the dust collecting box 5 and the cylinder. On the outer circumference between the dust-removing filters 27, the inside of the dust box 5 and the suction port of the electric blower 21 are communicated through the space 33.

In addition, the inner surface of the box upper part 22a of the dust collecting box 5 and the inner surface of the 1st dust removal filter 27a which comprises the inner side of the cylindrical dust removal filter 27 constitute one surface as a whole. That is, it is a state where there is no protrusion protruding from the inner surface of dust box 5 .

As shown in FIG. 3D , the cylindrical dust filter 27 has a cylindrical shape surrounding the inside of the cylindrical dust box 5 . The first dust removal filter 27a made of coarse dust filter located on the upstream side relative to the suction airflow removes relatively large dust such as cotton dust and hair from the dust in the suction airflow, and the first dust filter 27a located on the downstream side consists of a fine dust filter. The constituted second dust removal filter 27b removes dust such as sand dust, pollen, and mite droppings with a small particle diameter from the airflow.

Like this, by arranging multi-layer cylindrical dust filter 27 according to the size of the dust to be removed, the frequency of clogging of the dust filter screen can be reduced, and the continuous performance of air volume can be extended, but it can also be made into a single layer.

As the first dust removal filter 27a, it is preferable to use a metal screen, punched metal, resin screen, etc., a member with a relatively large aperture through which fine dust such as sand and dust can pass. It was made into the structure which minimized the fine protrusion on the inner surface of the 1st dust removal filter 27a by using the metal mesh whose air hole diameter is 250 micrometers.

On the other hand, as the second dust removal filter 27b, non-woven fabric, pulp, glass fiber, HEPA filter, etc. can be used, but by forming a non-woven fabric material, etc. that can efficiently remove finer particles into a pleated shape, The connected pleated parts are made into a round shape and arranged in a cylindrical shape, which can not only reduce the ventilation resistance, but also ensure the dust removal performance. In addition, if a filter coated with a porous material such as PTFE having good dust separation properties is used as the dust adhesion surface, it is more advantageous in that the mesh clogging of the second dust removal filter 27a can be suppressed.

FIG. 4 is an enlarged cross-sectional view of a part of the second dust filter 27 b shown in FIG. 3D .

In this embodiment, as shown in FIG. 3D and FIG. 4, in particular, a PTFE membrane with a vent hole diameter of about 0.5 microns is used, and a rigid sheet filter made of PET resin is made into a pleated pleated shape. filter 41, and connect both ends to form a cylindrical shape.

In addition, in the outer peripheral portion of the pleated filter 41, the concave portion 42 on the inner surface of the pleated member located on the upstream side of the suction air flow has a substantially U-shaped rounded corner with R=2 to 5 mm. In addition, the pleats of the pleated filter 41 which are close to the 1st dust removal filter 27a especially do not have a recessed part.

In addition, as the outside of the pleated filter 41 of the second dust filter 27b, a sealing portion 43 sealed with resin or sealant is provided only within a few millimeters of the upper end and the lower end, and the air flow is blocked from the upper and lower directions. sex.

The operation|movement of the electric vacuum cleaner of this Embodiment 1 comprised as mentioned above is demonstrated based on FIG. 5A, FIG. 5B, and FIG. 5C.

When starting to operate the electric blower 21, suction airflow takes place, and by suction tool 9, extension pipe 8, suction hose 7, the dust from the ground is sucked in the dust box 5 together with the air. At this time, the suction port 6 of the dust box 5 is eccentrically arranged in the tangential direction relative to the cylindrical section, so as shown in FIG. And converted into swirling airflow.

The swirling airflow generated in the box upper part 22 a of the dust box 5 descends while continuously rotating and reaches the vicinity of the cylindrical dust filter 27 . Here, the first dust removal filter 27a on the upstream side of the cylindrical dust removal filter 27 does not block the flow of the swirling airflow because there is no protrusion towards the inside of the dust collecting box 5. Furthermore, when the airflow continuously rotates, As shown in FIG. 5B , it passes through the first dust removal filter 27 a and the second dust removal filter 27 b in order, passes through the space portion 33 , and is sucked by the electric blower 21 .

Here, the dust sucked together with the suction airflow is introduced into the cylindrical dust removal filter 27 while rotating with the flow of the airflow, and the fine dust 51 such as sand and dust in the dust passes through the first dust removal filter 27a, and is passed through the outer side of the dust removal filter 27a. obtained by filtering through the second dust filter 27b.

In addition, the coarse dust 52, such as cotton dust, which is light in specific gravity and easily affected by wind pressure, is easily peeled off from the surface of the first dust removal filter 27a due to the whirling airflow, as shown in Fig. 5B and Fig. 27a to continue rotating in the hollow part of the cylinder. Due to this action, the first dust filter 27a performs a self-cleaning action by the air flow, so that the screen is not clogged, and the decrease in the suction force is suppressed.

In addition, when the amount of sucked dust increases, coarse dust 52 such as cotton dust descends while rotating in the first dust filter 27a, and is introduced into the dust storage portion 24.

As mentioned above, the coarse dust 52 such as cotton dust is rotated and descended by the wind pressure to be introduced into the dust storage part 24 by utilizing the whirling air flow, and the fine dust 51 such as sand and dust passes through the mesh of the first dust removal filter 27a, so In the 1st dust removal filter 27a, dust does not accumulate, and air permeability can be ensured.

That is, if the dust is sucked, the dust is reliably separated into fine dust 51 and coarse dust 52. The fine dust 51 is filtered by the second dust filter 27b, and the coarse dust 52 is captured in the dust storage portion 24. The suction path from the port 6 to the electric blower 21 runs through the periphery of the first and second dust removal filters, so that the decrease in air volume can be prevented.

In addition, the pleated concave portion 42 of the second dust removal filter 27b located on the upstream side of the suction air flow has rounded corners of approximately U-shaped 2R to 5R. By having rounded corners, fine dust is difficult to adhere to. In addition, the fine dust once accumulated is easy to peel off and remove, which can prevent the reduction of air volume caused by the clogging of the filter screen.

And, even when the amount of dust in the dust collecting box 5 increases, when the opening and closing cover 31 is opened, the dust can be smoothly discharged because there is no protrusion or the like inside the dust collecting box 5, and the dust collecting box 5 itself The maintenance is also very simple.

The evaluation test of the air volume maintenance performance was performed using the electric vacuum cleaner of Embodiment 1 mentioned above. The experimental method is to use a sieve to separate household dust into cotton dust and fine dust, mix 4g of cotton dust and 3g of fine dust, and absorb 7g each time to investigate the change of air volume. Fig. 6 shows the results. In addition, as a comparative experiment, a commercially available cyclone electric vacuum cleaner was used.

As shown in FIG. 6, in Embodiment 1, a high air volume is maintained from the initial stage. In addition, even if 80g is sucked, compared with maintaining more than 90% of the initial air volume, the structure of the comparative experiment is low from the initial air volume. In addition, The speed of air volume decrease is also fast, and in the state of sucking 60g, it is less than 80% of the initial air volume.

In addition, the suction power was measured, and it was found that Embodiment 1 was 100 W or more higher than that of the comparative experiment.

Thus, in the electric vacuum cleaner according to Embodiment 1, a high suction power can be ensured, and an electric vacuum cleaner in which suction power does not easily decrease even if dust is sucked can be provided.

In addition, in Embodiment 1, the second dust removal filter 27b is provided on the entire periphery of the first dust removal filter 27a, but as shown in the perspective view of FIG. 7 and the cross-sectional views of FIGS. It has been confirmed that the second dust filter 27b has the same effect even if it is arranged only on the suction side of the electric blower.

In addition, as shown in the dotted line in FIG. 9A and FIG. 9B , cutouts are made in the cylindrical dust filter 27 , and a viewing window 91 fitted with a transparent arc-shaped transparent material is provided in the cutouts. As a result, as shown in FIG. 9B , the longitudinal section of the dust accumulated in the dust box 5 can be visually confirmed, and it is easy to find when something other than the dust is mistakenly sucked during the cleaning operation.

Embodiment 2

Next, Embodiment 2 of the present invention will be described. Hereinafter, differences in configuration and operation from Embodiment 1 will be mainly described, and elements that are the same as those in Embodiment 1 will be assigned the same reference numerals, and descriptions of the configuration and operation will be omitted.

10 , 11A, 11B, 11C, and 11D are cross-sectional views showing the electric vacuum cleaner and dust collecting box 5 according to Embodiment 2. FIG.

As shown in Figures 10, 11A, 11B, 11C, and 11D, the difference from Embodiment 1 is that not only a cylindrical dust filter 27 is provided in the dust collecting box 5, but also a hollow disc-shaped third The dust removal filter 28 , the third dust removal filter 28 is provided below the cylindrical dust removal filter 27 .

This 3rd dust removal filter 28 is made of coarse dust filter, and the same as the first dust removal filter 21, is the metal screen cloth of 250 microns to make with vent hole diameter, and there is no gap between the inner end and the peripheral end of the first dust removal filter 27a The outer end covers the seal portion 43 on the outer periphery of the lower end side of the second dust filter 27 b in a gap-contact manner, and is arranged in contact with the seal portion 43 and the dust storage portion 24 of the dust box 5 without gaps.

And, make the air from the suction port 6 pass through the cylindrical hollow part and the dust storage part 24 of the first dust removal filter 27a, and flow to the second dust removal filter 28 at the lower end of the second dust removal filter 27b through the third dust removal filter 28. The third dust removal filter 28 is provided in the middle of the secondary air passage 29b which is the second air passage.

In this way, the first dust removal filter 27a, the second dust removal filter 27b and the third dust removal filter 28 are arranged in the main air passage 29a or the auxiliary air passage 29b communicating with the suction port 6 of the dust box 5 and the electric blower 21 .

The operation|movement of the vacuum cleaner comprised as mentioned above is demonstrated based on FIG. 12A, 12B, and 12C.

When starting to operate the electric blower 21, suction airflow occurs, and the dust from the ground is sucked in the dust box 5 by the suction tool 9, the extension pipe 8, and the suction hose 7. At this time, since the suction port 6 of the dust collecting box 5 is eccentrically arranged in the tangential direction relative to the cylindrical section, as shown in FIG. And converted into swirling airflow.

The swirling airflow generated in the box upper part 22 a of the dust box 5 descends while continuously rotating and reaches the vicinity of the cylindrical dust filter 27 . Here, the first dust removal filter 27a on the upstream side of the cylindrical dust removal filter 27 does not block the flow of the swirling airflow because there is no protrusion towards the inside of the dust collecting box 5. Furthermore, when the airflow continuously rotates, As shown in FIG. 12B , it passes through the first dust removal filter 27 a and the second dust removal filter 27 b in order, passes through the space portion 33 , and is sucked by the electric blower 21 .

Here, the dust sucked together with the suction airflow is introduced into the cylindrical dust removal filter 27 while rotating with the flow of the airflow, and the fine dust 51 such as sand and dust in the dust passes through the first dust removal filter 27a, and is passed through the outer side of the dust removal filter 27a. obtained by filtering through the second dust filter 27b.

In addition, coarse dust 52, such as cotton dust, which is light in specific gravity and easily affected by wind pressure, is easily peeled off from the surface of the first dust removal filter 27a due to the whirling airflow, and as shown in Fig. 12B and Fig. 27a to continue rotating in the hollow part of the cylinder. Due to this action, the first dust filter 27a performs a self-cleaning action by the air flow, so that the screen is not clogged, and the decrease in the suction force is suppressed.

In addition, when the amount of sucked dust increases, coarse dust 52 such as cotton dust descends while rotating in the first dust filter 27a, and is introduced into the dust storage portion 24.

The coarse dust 52 that is introduced into the dust storage part 24 is attracted to the direction of the pleat-shaped recess 42 at the end of the second dust removal filter 27b by the third dust removal filter 28 disposed on the dust storage part 24 top, so it is reliable. While being captured and accumulated in the dust storage part 24, the coarse dust 52 can be compressed to reduce the volume.

In addition, if there is no secondary air duct 29B, when the upstream side suction path of the dust box 5 is blocked, most of the dust in the dust storage portion 24 will fly and will adhere to the inner surface of the first dust filter 27a again. By connecting the secondary air duct 29B with the main air duct 29a through the dust storage part 24, when the upstream air intake path is blocked, the secondary air duct 29B constitutes a diversion channel, which prevents the above-mentioned dust from flying.

At this time, in the first dust removal filter 27a, the coarse dust 52 such as cotton dust is subjected to the wind pressure and rotates down by the swirling airflow, and the fine dust 51 such as sand and dust passes through the first dust removal filter 27a. Mesh holes, so dust does not accumulate and ensure breathability.

In addition, the third dust removal filter 28 is made of a metal mesh, and since the inner end is in contact with the peripheral end of the first dust removal filter without any gap, the outer end is in contact with the sealing portion provided on the outer periphery of the lower end side of the second dust removal filter 27b. 43 are arranged in contact with each other seamlessly, so the fine dust 51 mixed in the coarse dust 52 in the dust storage portion 24 passes through the third dust filter 28 and is filtered by the second dust filter 27b.

That is, if the dust is sucked, the dust is reliably separated into fine dust 51 and coarse dust 52, and the fine dust 51 is filtered by the second dust filter 27b, and the coarse dust 52 is reliably captured in the dust storage portion 24. The suction path from the suction port 6 to the electric blower 21 can be ensured to pass through the periphery of the first and second dust removal filters, so that the air volume can be prevented from decreasing.

In Embodiment 2, the same evaluation test of air volume maintenance performance as in Embodiment 1 was carried out.

As a result, as shown in FIG. 13 , it can be seen that Embodiment 2 is superior to Embodiment 1 in air volume maintenance performance.

In this way, not only in Embodiment 1, but also by arranging the third dust filter 28 in the dust box 5, since the coarse dust is reliably captured and accumulated in the dust storage part 24, it can be further prevented from reducing the air volume and is useful. electric vacuum cleaner.

Furthermore, in Embodiment 3, although the second dust removal filter 27b and the third dust removal filter 28 are provided on the entire periphery of the first dust removal filter 27a, similar to Embodiment 1, even if not the entire periphery, It was also confirmed that the structure (not shown) in which the second dust removal filter 27b and the third dust removal filter 28 are arranged only on the suction side of the electric blower has the same effect.

Embodiment 3

Next, Embodiment 3 of the present invention will be described. Hereinafter, differences in configuration and operation from Embodiments 1 and 2 will be mainly described, and the same elements will be assigned the same reference numerals, and descriptions of the configuration and operation will be omitted.

FIG. 14 is a cross-sectional view of a part of cylindrical dust filter 27 seen from above. About other structures, it is the same as Embodiment 2.

As shown in FIG. 14 , a drive gear 141 is provided on the sealing portion 43 of the upper outer periphery of the second dust filter 27 b constituting the cylindrical dust filter 27 , and the other drive gear 142 fitted with the drive gear 141 , and the rotating motor 143 that drives the drive gear 142 to rotate, the second dust removal filter 27b and the first dust removal filter 27b rotate integrally.

Again, in this way, both the first dust removal filter 27a and the second dust removal filter 27b both can be made to rotate, and only the second dust removal filter 27b can be made to rotate, or the first dust removal filter 27b can be made to rotate. The dust removal filter 27a is equipped with the said drive gear 141, and is the structure which rotates only the 1st dust removal filter by the drive gear 142 and the rotation motor 143 similarly to the above.

The first dust removal filter 27a and the second dust removal filter 27b are rotated by the drive of the rotary motor 143, so that the amount of dust attached can be prevented from being biased to one side according to the positions of the first dust removal filter 27a and the second dust removal filter 27b. The non-uniform state, that is, the state in which much dust adheres to the vicinity of the partition wall 26 where the attractive force of the electric blower 2 acts strongly. In addition, the amount of dust attached to the first dust removal filter 27a and the second dust removal filter 27b can be made uniform, and a reduction in the air volume due to clogging of the filter screen can be further prevented.

The evaluation test of the air volume maintenance performance was performed using the electric vacuum cleaner of this Embodiment 3 mentioned above. The experimental method is to use a sieve to separate household dust into cotton dust and fine dust in the same way, mix 4g of cotton dust and 3g of fine dust, attract 7g each time, and investigate the change of air volume. Fig. 15 shows the results.

As shown in FIG. 15 , it can be seen from the third embodiment that the air volume maintenance performance is superior to that of the second embodiment.

In this manner, the electric vacuum cleaner according to Embodiment 3 can provide a vacuum cleaner that ensures a high suction power and that does not easily reduce the suction air volume even when dust is sucked.

Furthermore, in Embodiment 3, the second dust removal filter 27b and the third dust removal filter 28 are also arranged on the entire circumference of the first dust removal filter 27a, but the second dust removal filter 27b, the third dust removal filter 28 It has been confirmed that the filter is arranged only on the suction side of the electric blower (not shown) to have the same effect.

Embodiment 4

Next, Embodiment 4 of the present invention will be described. Hereinafter, differences in configuration and operation from Embodiments 1 to 3 will be mainly described, and the same elements will be given the same reference numerals, and descriptions of the configuration and operation will be omitted.

16A, 16B, and 17 are cross-sectional views showing dust box 5 and its main parts of the electric vacuum cleaner according to the fourth embodiment. In FIGS. 16A and 16B , the first dust removing mechanism 161 is fixed to at least one of the upper part or the lower part of the dust box 5 .

Here, as shown in FIG. 17, the 1st dust removal mechanism 161 is made into the shape of a scraper with both ends sharpened, and presses against the inner periphery of the 1st dust removal filter 27a, and contacts it.

At this time, as described in Embodiment 3, the driving gear 141 on the second dust removal filter 27b is rotated by the rotating motor 143 and the driving gear 142, and the second dust removal filter 27b and the first dust removal filter are rotated. When both of 17a rotate integrally, the first dust removal mechanism 161 slides while pressing the inner surface of the first dust removal filter 27a. Thus, cleaning the inner surface of the first dust removal filter 27a can remove dust such as cotton dust or fibers attached or entangled on the inner surface of the first dust removal filter 27a, can ensure the air permeability of the first dust removal filter 27a, and can Prevent the air volume from decreasing.

Furthermore, in Embodiment 4, the first dust filter 27a is set to rotate once every 5 seconds, and the motor is turned on immediately after the electric blower 21 stops using a control mechanism not shown. The power switch of 143 is turned on and off for 5 seconds, so that both the second dust removal filter 27b and the first dust removal filter 27a are integrally rotated.

In addition, although only one 1st dust removal mechanism 161 is provided here, it is still effective to make it a plurality.

In addition, although the shape of the first dust removing mechanism 161 is made into a scraper shape here, if the shape is changed to a brush shape, a velvet shape, etc. according to the type of deposits, an effect unique to the shape can be obtained.

Furthermore, here, as shown in FIG. 16A, as the first dust removal mechanism 161, although the rod-shaped member is installed on the upper part of the dust box 5 in the vertical direction, as shown in FIG. The inner circumference of the first dust filter 27a is installed in an angled helical shape, and when the first dust filter 27a is rotated, the cutting effect is increased, and the entangled hair or lint can be cut and cleaned at the same time. , to further improve the effect.

Embodiment 5

Next, Embodiment 5 of the present invention will be described. Hereinafter, differences in configuration and operation from Embodiments 1 to 4 will be mainly described, and the same reference numerals will be assigned to the same elements, and descriptions of the configuration and operation will be omitted.

19A and 19B are cross-sectional views showing an electric vacuum cleaner according to Embodiment 5. FIG.

19A is a longitudinal sectional view of dust collecting box 5 of the electric vacuum cleaner according to Embodiment 5. FIG. In FIG. 19A, the second dust removing mechanism 191 is provided outside the second dust removing filter 27b. In addition, as shown in FIG. 20 , which is an enlarged view of its main part, the second dust removal mechanism 191 is equipped with a beating part 201 which bends a metal foil to form a spring.

The driving gear 141 is connected to the second dust removal filter 27b, the first dust removal filter 27a is installed in an interlocking manner with the second dust removal filter 27b, and the driving gear 141 is rotated by the rotating motor 143 and the driving gear 142, so that the first The dust removal filter 27a and the 2nd dust removal filter 27b rotate.

As shown in Fig. 19B and Fig. 20, if the first dust removal filter 27a and the second dust removal filter 27b rotate, the beating part 201 that is arranged on the second dust removal mechanism 191 will apply to the second dust removal filter 27b from the outside. The second dust removal filter 27b can be cleaned by knocking down the fine dust 51 adhered and accumulated inside the pleated filter 41 which made the second dust removal filter 27b into a substantially U-shape. Moreover, the whole periphery of the 2nd dust removal filter 27b can be cleaned by continuing rotation.

In addition, here, make a structure as follows: that is, the second dust filter 27b is set to rotate once in 5 seconds, and the power switch of the motor 143 is turned on immediately after the electric blower 21 stops by using a control mechanism not shown. For 5 seconds, the second dust removal filter 27b and the first dust removal filter 27a are linked to rotate together.

Therefore, cleaning of the second dust filter 27b can be performed for 5 seconds after the electric blower 21 stops, and the dust adhering to the entire periphery of the second dust filter 27b can be dropped.

In Embodiment 5, the same evaluation test of air volume maintenance performance as in Embodiment 1 was performed. As a result, as shown in FIG. 21 , it can be seen that Embodiment 5 is superior to Embodiment 2 in air volume maintenance performance.

In this way, by rotating the first dust removal filter 27a and the second dust removal filter 27b, the dust adhering to the second dust removal filter 27b is removed and cleaned using the second dust removal mechanism 191 . Thereby, it is possible to further prevent the air volume from decreasing.

In addition, here, as the second dust removal mechanism, although the beating part 201 uses a bent metal foil to make a spring-like member, it may be an elastic body such as a plate-shaped member or rubber.

Embodiment 6

Next, Embodiment 6 of the present invention will be described. Hereinafter, differences in configuration and operation from Embodiments 1 to 5 will be mainly described, and the same reference numerals will be assigned to the same elements, and descriptions of the configuration and operation will be omitted.

Fig. 22 is a perspective view showing dust collecting box 5 of an electric vacuum cleaner according to Embodiment 6 of the present invention.

In FIG. 22, the third dust removal mechanism 221 is fixed to the box upper part 22a of the dust collecting box 5, and the box upper part 22a is configured to rotate while maintaining airtightness with the box central part 22b.

Here, as shown in FIG. 23 , the third dust removal mechanism 221 is shaped like a scraper with both ends sharpened, and presses against the first dust filter 27 a to contact it.

At this time, if the box upper part 22a is rotated, since the third dust removal mechanism 221 slides while pushing the inner surface of the first dust removal filter 27a, the inner surface of the first dust removal filter 27a can be cleaned, and the adhesion and winding can be removed. Dust such as surface dust and fibers on the inner surface of the first dust removal filter 27a ensures the air permeability of the first dust removal filter 27a and prevents the air volume from decreasing.

In addition, although one third dust removal mechanism 221 is shown here, it is still effective to make it a plurality.

In addition, although the shape of the third dust removing mechanism 221 is made into a scraper shape here, if the shape is changed into a brush shape, a velvet shape, etc. according to the type of deposits, an effect unique to the shape can be obtained.

Furthermore, here, although the third dust removal mechanism 221 is installed in the vertical direction, as shown in FIG. Cutting effect, it can cut tangled hair and thread while cleaning, further improving the effect.

In addition, as the means to rotate the third dust removal mechanism 221 fixed on the box upper part 22a, for example, it can be manually rotated in any direction by simplifying the structure, or it can be made with a not shown The rotation drive mechanism and the control mechanism rotate the third dust removal mechanism 221 in conjunction with the timing of the operation or stop of the electric blower 21 .

Embodiment 7

Next, Embodiment 7 of the present invention will be described. Hereinafter, differences in configuration and operation from Embodiments 1 to 6 will be mainly described, and the same reference numerals will be assigned to the same elements, and descriptions of the configuration and operation will be omitted.

25 is a perspective view showing dust collecting box 5 of an electric vacuum cleaner according to Embodiment 7 of the present invention, and FIG. 26 is a main part sectional view showing a fourth dust removing mechanism (cylindrical basket 251 ) of the electric vacuum cleaner.

FIG. 25 shows that a cylindrical basket 251 as a fourth dust removal mechanism is provided in the space 33 outside the second dust filter 27b. In Embodiment 7, as shown in FIG. 25 , a cylindrical basket 251 is configured such that upper and lower circumferential rotating gears 252 are connected by a plurality of connection parts 253 , and a beating part 254 is attached to the connection parts 253 . As shown in FIG. 26 , the beating part 254 is formed by bending a metal foil into a spring shape, and then mounted on the connection part 253 .

Then, the cylindrical basket 251 is rotated by rotating the circumferential rotating gear 252 with the driving gear 256 mounted on the motor 255, and the outer periphery of the second dust filter 27b is vibrated or hit by the beating part 254.

If the cylindrical basket 251 as the fourth dust removal mechanism rotates, the knocking part 254 vibrates or strikes the outer periphery of the second dust filter 27b, so that it adheres and accumulates in the pleat-shaped inside of the second dust filter 27b, especially The fine dust 51 in the concave portion 42 falls to clean the second dust filter 27b. Moreover, by continuing rotation, the whole circumference of the 2nd dust removal filter 27b can be cleaned.

Here, the cylindrical basket 251 is set to rotate once in 5 seconds, and the power switch of the motor 255 is turned on for 5 seconds immediately after the electric blower 21 stops using a control mechanism not shown. clock, the rotating basket 251 as the fourth dust removal mechanism is rotated once to clean the entire circumference of the second dust removal filter 27b.

In Embodiment 7, an evaluation test of air volume maintenance performance was performed in the same manner as the other embodiments.

As a result, as shown in FIG. 27 , it can be seen that Embodiment 7 is superior to Embodiment 2 in air volume maintenance performance.

In this way, by rotating the cylindrical basket 251 as the fourth dust removal means, the dust adhering to the second dust removal filter 27b can be removed and cleaned, so that the air volume can be further prevented from being lowered.

In addition, here, as the beating part 254, a structure in which a metal foil is bent to form a spring is used, but it may be a plate-shaped member or an elastic body such as rubber.

In addition, here, although only the cylindrical basket 251 as the fourth dust removal mechanism is rotated by a control mechanism not shown, the third dust removal mechanism 221 of Embodiment 6 may be rotated similarly by this control mechanism. Rotate, you can also make them rotate at the same time or staggered time rotation.

Embodiment 8

Next, Embodiment 8 of the present invention will be described. Hereinafter, differences in configuration and operation from Embodiments 1 to 7 will be mainly described, and the same reference numerals will be assigned to the same elements, and descriptions of the configuration and operation will be omitted.

28 is a perspective view showing dust collecting box 5 of an electric vacuum cleaner according to Embodiment 8 of the present invention, FIG. 29A is a side sectional view showing a dust accumulation state seen from the lateral direction, and FIG. 29B is a state showing a state in which the opening and closing cover 31 is opened. side sectional view.

As shown in FIG. 28 , in Embodiment 8, the third dust filter 28 is formed into a generally truncated cone shape open up and down, and the upper diameter of the truncated cone is in contact with the diameter of the lower end of the first dust filter 27a. In addition, the diameter of the lower portion of the truncated cone is smaller than the inner diameter of the bottom of the dust storage portion 24 , so that the lower portion of the truncated cone is in contact with the bottom of the dust storage portion 24 without gaps. Other structures are the same as those in Embodiment 1 of the present invention. In addition, at this time, the third dust filter 28 is made of a metal mesh having a vent hole diameter of 250 micrometers as in the first embodiment.

Even if the third dust removal filter 28 is made into a roughly truncated conical shape open up and down, the flow of air is the same as in Embodiment 1. The fine dust 51 is filtered by the second dust removal filter, and the coarse dust 52 is captured and deposited on the dust. In the storage part 24.

Here, using the fourth dust removal mechanism or the like shown in Embodiment 7, the fine dust 51 peeled and fallen from the second dust removal filter is moved along the conical generatrix formed outside the third dust removal filter 28 as shown in FIG. 29A . The inclined surface falls reliably to the bottom surface of the dust storage part 24 . Thereby, the distance between the fine dust 51 that has fallen and the second dust removal filter 27b can be pulled away, the attraction to the fine dust 51 that has fallen can be reduced, and the fine dust 51 can be prevented from adhering to the second dust removal filter 27b again. And it can prevent the reduction of the air volume caused by the clogging of the filter screen.

And also have, by making the 3rd dedusting filter 28 the truncated cone shape as mentioned above, even if the coarse dust 52 is clogged in the inside of the 3rd dedusting filter 28, since the lower space is wider than the upper space, it is difficult to cause The pressure contact with the third dust removal filter 28 is caused by the diffusion of the coarse dust 52 or the like. In addition, as shown in Figure 29B, if the opening and closing cover 31 is opened through the hinge 32 arranged on the bottom surface of the dust storage part 24, the dust can be easily removed from the third dust removal filter 28 due to gravity, so it can be made dust-free. An electric vacuum cleaner with excellent dust throwing performance that can be discharged without being caught.

Embodiment 9

Next, Embodiment 9 of the present invention will be described. Hereinafter, differences in configuration and operation from Embodiments 1 to 8 will be described, and the same reference numerals will be assigned to the same elements, and descriptions of the configuration and operation will be omitted.

30 is a perspective view showing the dust collecting box 5 of the electric vacuum cleaner according to Embodiment 9 of the present invention, FIG. 31A is a side sectional view showing the dust accumulation state seen from the lateral direction, and FIG. Side cutaway view.

As shown in FIG. 30, in this Embodiment 9, the shape of the 1st dust removal filter 27a is made into the shape of a truncated cone whose lower diameter is larger than an upper diameter.

By making the shape of the first dust removal filter 27a into the above-mentioned truncated conical shape, as shown in FIG. 31A, it will attract more dust than the amount of dust that can be stored by the dust storage part 24, even if the coarse dust 52 blocks the first dust removal filter. In the filter 27a, since the lower space is wider than the upper space, it is difficult to cause pressure contact with the first dust filter 27a due to the diffusion of the coarse dust 52 or the like. In addition, as shown in Figure 31B, if the hinge 32 provided on the bottom surface of the dust storage part 24 is used to open the opening and closing cover 31, the dust can be easily removed from the first dust filter 27a due to gravity, so it can be made into a dust filter. An electric vacuum cleaner that discharges without getting stuck and has excellent dust throwing performance.

Embodiment 10

Next, Embodiment 10 of the present invention will be described. Hereinafter, differences in configuration and operation from Embodiments 1 to 9 will be mainly described, and the same reference numerals will be assigned to the same elements, and descriptions of the configuration and operation will be omitted.

32A, 32B, and 33 show the configuration of the tenth embodiment. An opening 321 is provided in a part of the third dust removal filter 28 . In addition, a dust chamber 322 for storing dust removed by the second dust removing mechanism 191 is provided below the opening 321 . The dust chamber 322 is defined in the dust storage unit 24 , and the dust removed by the second dust removal mechanism 191 is stored in the divided dust chamber 322 .

In addition, in order to reliably store the dust removed by the second dust removal mechanism 191 in the dust chamber 322 through the opening 321, the opening 321 is arranged directly below the second dust removal mechanism 191 as shown in FIGS. 32A, 32B, and 33. And the dust chamber 322 communicated with the opening 321 . In addition, by matching the shape of the opening 321 and the entrance of the dust chamber 322 , the dust falling into the opening 321 can be reliably stored in the dust chamber 322 .

Furthermore, by arranging the dust chamber 322 in the dust storage part 24, when the dust stored in the dust storage part 24 is thrown into the dustbin, the dust in the dust chamber 322 can also be thrown away at the same time.

In addition, the dust chamber 322 is provided with a vent 323 , and is provided with a fourth dust removal filter 324 blocking the vent 323 . The vent hole diameter of the fourth dust removal filter 324 is made of a metal mesh with a vent hole diameter of 250 microns the same as the third dust removal filter 28 .

Furthermore, the arrangement of the fourth dust removal filter 324 in the suction air passage is the same as that of the third dust removal filter 28, and it is arranged in the cylindrical hollow part where the air from the suction port 6 passes through the first dust removal filter 27a. , the dust storage part 24, and flow through the vent 323 of the dust chamber to the second air passage at the lower end of the second dust removal filter 27b, that is, the middle of the secondary air passage 29b.

Next, the operation of the tenth embodiment will be described.

The fine dust 51 removed by the second dust removal mechanism 191 is stored in the dust chamber 322 by falling into the opening 321 provided on the third dust removal filter 28 . By arranging the dust chamber 322 for storing the fine dust 51 in the dust storage part 24, the amount of re-rolling of the dust during cleaning can be further reduced, and it can be prevented from passing through the first air passage, that is, the main air passage 29a and the second air passage. That is, the air volume of the auxiliary air duct 29b decreases.

In addition, a ventilation hole 323 is provided in the dust chamber, and by closing the ventilation hole 323 with a fourth dust removal filter 324 of a metal mesh, the secondary air path 29b which is the second air path can be ensured. Thus, as described in Embodiment 2, when the dust is sucked, the coarse dust 51 is captured in the dust storage portion 24, so that the dust can be ensured to be distributed around the first dust removal filter 27a and the second dust removal filter 27b. The air duct can prevent the air volume from decreasing.

In addition, by separating the removed fine dust 51 from the coarse dust 52 and storing them in the divided dust chamber 322, it is possible to prevent the fine dust 51 from being reattached to the second dust filter 27b due to the rolling up of the fine dust 51 during cleaning. Therefore, it is possible to more effectively prevent the reduction of the air volume passing through the primary air passage 29a which is the first air passage and the secondary air passage 29b which is the second air passage.

Industrial availability

As described above, since the electric vacuum cleaner of the present invention can provide an electric vacuum cleaner that ensures a high suction power and does not easily reduce the suction force even if dust is sucked, maintenance such as cleaning the filter and discharging dust can be greatly reduced. It can be used not only for household electric vacuum cleaners, but also for various vacuum cleaners such as electric vacuum cleaners for business use.

Claims (9)

1. An electric vacuum cleaner, having: Generate an attractive electric blower (21); Dust separation part (23), this dust separation part (23) comprises: There is a suction port (6) for sucking dust-containing air through the above-mentioned electric blower (21), and the box upper part (22a) that makes the air sucked from the above-mentioned suction port (6) generate a swirling airflow, And the box central part (22b) with a certain space on the outer peripheral direction of the above-mentioned dust filter (27a) is provided with the hollow dust filter (27a) installed on the bottom of the above-mentioned box upper part (22a) inside. ; A dust storage part (24), the dust storage part (24) is in a state of being in communication with the above-mentioned dust separation part (23), arranged below the above-mentioned dust separation part (23), and stores dust separated by the above-mentioned dust separation part (23). the dust; It is characterized by: The air that is introduced from the suction port (6) and forms a swirling airflow in the upper part of the box (22a) passes through the dust removal filter (27a) while descending to the hollow part of the dust removal filter (27a) in the middle part (22b) of the box. The air from the filter (27a) passes through the space and reaches the electric blower (21). 2. The electric vacuum cleaner according to claim 1, characterized in that a second dust removal filter (27b) for capturing fine dust (51) is provided on the downstream side of the dust removal filter (27a). 3. The electric vacuum cleaner according to claim 1 or claim 2, characterized in that the above-mentioned dust filter (27a) contains at least any one of punched metal, metal mesh and resin mesh. 4. The electric vacuum cleaner according to claim 2, characterized in that the dust filter (27a) is in the shape of a truncated cone with a lower diameter larger than an upper diameter. 5. The electric vacuum cleaner according to claim 2, characterized in that, the second dust filter (27b) is formed by a pleated member made into a cylindrical shape (41), and is arranged on the (27a) of the above-mentioned dust filter. ) periphery. 6. The electric vacuum cleaner according to claim 5, characterized in that, on the outer peripheral portion of the cylindrical shape of the second dust removal filter (27b), the inner surface of the pleated member is substantially U-shaped (42) with a have rounded corners. the 7. The electric vacuum cleaner according to claim 1, characterized in that the dust storage part (24) discharges the dust by opening the bottom (31). 8. The electric vacuum cleaner according to claim 1, characterized in that at least a part of at least one of the dust separation part (23) or the dust storage part (24) is made of a transparent material. 9. The electric vacuum cleaner according to claim 1 or claim 8, characterized in that at least a part of the dust filter (27a) is formed of a transparent material.

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