JP5077372B2 - Electric vacuum cleaner - Google Patents

Description

  The present invention relates to a vacuum cleaner, and more particularly to the structure of a cyclonic vacuum cleaner.

  In conventional cyclone vacuum cleaners, coarse dust and medium-sized dust larger than that are sucked in the cyclone swivel part, separated from the air current, collected in the dust case, and collected in the swivel part. The fine dust that passed without being collected was collected by the dust collecting filter on the downstream side. For this reason, there is a problem that the filter is clogged by repeated use, and the suction air volume gradually decreases each time the use is repeated, and the suction performance is deteriorated.

  In order to solve these problems, vacuum cleaners equipped with a cyclone swirl technology that separates airflow and dust with high performance have appeared. This vacuum cleaner is hardly responsible for collecting fine dust with the dust collection filter and only needs to collect a small amount of dust, so it is very unlikely that pressure loss will increase due to dust accumulation in the dust collection filter. It has become. For this reason, even if it operates for a long period of time, it has the characteristic that suction | attraction suction force does not fall easily (for example, refer patent document 1).

Special table 2007-508934 gazette (FIG. 2)

  The above-mentioned Patent Document 1 includes a wall having a large number of through holes forming an outlet from the separation chamber for the purpose of reducing the risk that the outlet (a large number of through holes) of the cyclone swivel portion is blocked. A separation device with a shroud has been proposed in which the shroud further comprises a lip extending from the wall into the separation chamber, the lip having a plurality of holes therethrough. . However, since the airflow swirling in the separation chamber is a turbulent flow, a wind speed distribution is generated, and in a place where the swirling wind speed is slow, there is a high probability that the through hole (opening) will be clogged with dust. There was a trend. In addition, a large amount of sucked dirt and dust is accompanied by a large amount of cotton dust that is relatively light in weight and swirls predominantly by the movement of the airflow and that has a dust size larger than the through hole. Although there is some effect of reducing dirt and dust, it is difficult to avoid the risk that the through hole is blocked. Therefore, the electric vacuum cleaner of Patent Document 1 cannot be an effective solution to the above problem.

  The present invention has been made to solve the above-described problems, and a vacuum cleaner capable of reducing the risk that the opening of the outlet portion of the cyclone portion of the cyclone type vacuum cleaner is blocked. The purpose is to provide.

An electric vacuum cleaner according to the present invention includes an electric blower that generates a suction force, a suction port body that sucks dust-containing air from the outside by a suction force to the electric blower, and between the suction port body and the electric blower. A cyclone portion that is arranged and includes an inlet, a swirl chamber, and an outlet, and that swirls the intake air flowing in from the inlet by the swirl chamber and separates dust and then exhausts the intake air from the outlet; and the swirl chamber An opening formed in the longitudinal axis direction of the first and second and a collecting portion that is provided adjacent to the opening and collects the dust separated in the swirl chamber, and the outlet portion separates the dust. And a plurality of openings for discharging the intake air after being rotated, and supported rotatably at the upper part of the swirl chamber so as to be orthogonal to the longitudinal axis direction of the swirl chamber, It rotates at high speed.
An electric vacuum cleaner according to the present invention includes an electric blower that generates a suction force, a suction port body that sucks dust-containing air from the outside by a suction force to the electric blower, and between the suction port body and the electric blower. A cyclone portion that is arranged and includes an inlet, a swirl chamber, and an outlet, and that swirls the intake air flowing in from the inlet by the swirl chamber and separates dust and then exhausts the intake air from the outlet; and the swirl chamber An opening formed in the longitudinal axis direction, a collecting part that is provided adjacent to the opening and collects dust separated in the swirl chamber, and an air passage located downstream of the outlet part A dust sensor provided in the interior of the swirl chamber, wherein the outlet portion includes a plurality of openings for discharging the intake air after the dust has been separated and is rotatably supported. It rotates at a higher speed.

  According to the vacuum cleaner of the present invention, the outlet part of the cyclone part rotates at a higher speed than the swirling airflow in the swirl chamber, so that the opening part (a number of through holes or other shapes) of the outlet part is blocked. Risk of reducing the intake air volume and maintaining a high turning separation performance for a long period of time.

It is a figure which shows the whole structure of the vacuum cleaner which concerns on Embodiment 1 of this invention. It is a schematic diagram of the characteristic part of the cleaner body of FIG. It is the schematic of the other example of the exit part of FIG. It is the schematic for demonstrating the relationship between the rotation direction of the turning chamber of FIG. 2, and an exit part. It is a graph which shows the relationship between the rotation speed of the exit part of FIG. 4, and the center particle diameter of the particle | grains which can pass an exit part. It is a schematic diagram of the characteristic part of the vacuum cleaner main body of the vacuum cleaner which concerns on Embodiment 2 of this invention. It is a schematic diagram of the characteristic part of the vacuum cleaner main body of the vacuum cleaner which concerns on Embodiment 3 of this invention.

Embodiment 1 FIG.
Embodiment 1 of the present invention will be described below with reference to the drawings.
FIG. 1 is a diagram showing an overall configuration of the electric vacuum cleaner according to Embodiment 1 of the present invention.
As shown in FIG. 1, the vacuum cleaner 10 includes a suction port body 1, a suction pipe 2, a connection pipe 3, a hose 4, and a cyclone-type vacuum cleaner body 5.
The suction port body 1 sucks dust and dust-containing air on the floor surface. One end of a straight cylindrical suction pipe 2 is connected to the outlet side of the suction port body 1. A handle 2a is provided at the other end of the suction pipe 2, and one end of the connection pipe 3 that is slightly bent in the middle is connected. One end of a flexible bellows-like hose 4 is connected to the other end of the connection pipe 3. Furthermore, the vacuum cleaner main body 5 is connected to the other end of the hose 4. The suction port body 1, the suction pipe 2, the connection pipe 3, and the hose 4 constitute a part of a flow path for allowing dust and dust-containing air to flow into the cleaner body 5 from the outside.

FIG. 2 is a schematic view of a characteristic portion of the cleaner body 5 of the electric vacuum cleaner of FIG.
As shown in FIG. 2, the cleaner body 5 includes a dust collection chamber 100. The dust collection chamber 100 houses a cyclone unit (swivel unit) 101 and a collection unit 107. The cyclone unit 101 includes an inflow port 102, a swirl chamber 103, and an exit unit 104. The intake air containing dust flowing in from the inflow port 102 is swirled by the swirl chamber 103, and the intake air is separated after the dust is separated. Exhaust from the outlet 104. The swirl chamber 103 has, for example, a conical shape and has a function of separating the air from dust and dirt by swirling the intake air as described above. The structure of the inflow port 102, the swirl chamber 103, and the outlet portion 104 is optimally designed so that the swirling airflow in the swirl chamber 103 is, for example, 5,000 to 6,000 rpm at a wind speed of 20 to 30 m / s. In addition, medium-sized dust and fine dust that are smaller than that can be separated from air with high efficiency.

  The outlet portion 104 has a plurality of openings 104 a in a part of its wall surface, has a structure capable of rotating the shaft, and is provided to protrude into the swirl chamber 103. The outlet 104 is connected to the rotary motor 105 via a bearing and a coupling (both not shown), and can be rotated at a high speed of several tens of thousands to several hundred thousand rpm. As described above, the swirling airflow in the swirling chamber 103 is 5,000 to 6,000 rpm at a wind speed of 20 to 30 m / s, but the outlet 104 rotates at a higher speed. The air separated from the dust in the swirl chamber 103 is sucked from the opening 104a of the outlet 104 to the electric blower (not shown) side through a fine dust filter (not shown).

  An opening portion 106 is formed in the longitudinal axis direction of the swirl chamber 103, and a collection portion 107 is formed so as to face the opening portion 106. The swirl chamber 103 and the opening 106 are optimally designed so that a part of the airflow in the swirl chamber 103 flows inside the collection unit 107, but the wind speed is weaker than 1 m / sec. For this reason, the dust accumulated in the collection unit 107 does not flow back to the swirl chamber 103 again through the opening 106 provided in the longitudinal axis direction of the swirl chamber 103.

Here, an outline of the operation of the cyclone unit 101 will be described.
When the cyclone unit 101 takes in the dust-containing air from the inlet 102 through the intake air passage, the dust-containing air flows in a horizontal direction along the side wall of the swirl chamber 103 and becomes a swirl airflow, and a forced vortex near the center axis. While forming the region and the quasi-free vortex region on the outer peripheral side, it flows downward due to its path structure and gravity. Dust travels below the swirl chamber 103 on the swirling flow that descends. As a result, the waste is sent into the collection unit 107 through the opening 106, where it is deposited and compressed. The air from which the dust has been removed rises along the central axis of the swirl chamber 103 and is discharged from the outlet portion 104.

  As described above, the dust-containing air taken in from the inlet 102 follows the spiral trajectory as indicated by reference numeral 110 and is discharged from the outlet 104. And the air discharged | emitted from the exit part 104 is discharged | emitted from the cleaner body 5 via a fine dust filter (not shown), an electric blower (not shown), etc.

  In the first embodiment, the outlet portion 104 rotates at a higher speed than the swirling airflow in the swirl chamber 103, and it is possible to eliminate dust adhesion at the opening portion 104a of the outlet portion 104 that causes a reduction in the intake air volume. Thus, the opening 104a can be prevented from being blocked. For this reason, there is no reduction in the suction air volume, and high turning separation performance can be obtained. The reason will be described in detail below.

  The biggest cause of dust adhesion is that a large wind speed distribution is generated because the airflow in the swirl chamber 103 is turbulent, and the dust adheres to the opening 104a particularly in a place where the swirl wind speed is slow. Cotton dust, which is abundant in household waste, tends to block the opening 104a most easily. Since cotton dust is lightweight and swivels predominantly by the movement of the air current, it tends to adhere to the opening 104a without being swung and separated. Further, when dust such as cotton dust adheres, it grows from the starting point and becomes coarse, and therefore the frequency of blockage increases.

  For the problem of dust adhering to and blocking the opening 104a, the most effective measure is to eliminate the air velocity distribution of the airflow in the swirl chamber 103. According to the first embodiment, the outlet 104 Since the relative speed difference between the opening 104a and the swirling dust can be increased by rotating at a higher speed than the swirling airflow, the wind speed distribution of the swirling airflow can be canceled.

  Further, since the outlet 104 rotates at high speed, even if dust comes into contact with the outlet 104, it can be bounced off by a physical impact. Normally, the dust contained in the swirling airflow is charged with a large amount of static electricity, but the surface of the outlet portion 104 also tends to be charged with friction due to friction caused by the swirling airflow, so that dust is very likely to adhere to the outlet portion 104. However, it can give an impact force that exceeds the electrostatic attraction force.

  Therefore, for the problem of dust adhering to the opening 104a and closing it, it is also an effective measure to jump off the dust to be attached by physical impact. According to the first embodiment, The above problem is effectively suppressed by rotating the outlet portion 104 at a high speed.

Next, the cyclone unit 101 will be described in more detail.
First, the shape of the outlet portion 104 will be described.
The exit portion 104 shown in FIG. 2 has a substantially cylindrical shape, but is not limited thereto, and may have a substantially cylindrical shape as a part of the structure, and further has a substantially conical shape or a substantially conical shape. A part of the structure may be used. In addition, as the opening 104a, a slit-shaped opening pattern is provided in the example of FIG. 2, but the opening pattern is not limited to this.

  FIG. 3 is a schematic diagram for explaining another example of the structure of the outlet portion 104 of the cyclone unit 101. 3 has a substantially cylindrical upper portion and a substantially conical lower portion. The opening 104b forms a dot-shaped opening pattern 301, and the same effect as in the case of FIG. 2 can be obtained.

  The slit shape of the opening 104a of the outlet 104 in FIG. 2 and the opening pattern 301 of the dot-shaped opening 104a in FIG. 3 are both dependent on the operating parameter conditions such as the suction air volume and wind speed of the electric blower and the rotation speed of the rotary motor 105. The opening area may be optimally adjusted according to the specifications of the vacuum cleaner main body 5 of the vacuum cleaner 10 so as to suppress the pressure loss and not adversely affect the performance.

Next, the rotation operation of the cyclone unit 101 will be described with reference to FIGS. 4 and 5.
FIG. 4 is a schematic diagram for explaining the relationship between the rotation direction of the swirl chamber 103 and the outlet portion 104, and is a cross-sectional view of the cyclone portion 101. In the figure, 401 is a wall that partitions the space of the swirl chamber 103. This wall 401 is continuous with the inflow port 102 in which the dust-containing air sucked from the outside enters the swirl chamber 103, and when the dust-containing air sucked in from the outside enters the swirl chamber 103 through the inflow port 102, Wind flows as indicated by reference numeral 402. The wind flow at the outlet 104 of the cyclone 101 is in the same rotational direction as the wind flow 402 in the swirl chamber 103 as indicated by the arrow trajectory 403, but is not limited thereto, and is opposite to the wind flow 402. Direction may be used. As with the opening pattern 301, the rotation direction is controlled so that pressure loss is suppressed and performance is not adversely affected by operating parameter conditions such as the suction air volume and speed of the electric blower and the rotation speed of the rotary motor 105. What is necessary is just to adjust optimally with the specification of the cleaner body 5 of the machine 10.

FIG. 5 is a graph showing the relationship between the number of rotations of the outlet 104 in FIG. 4 and the central particle diameter of particles that can pass through the outlet 104. In this data, talc four kinds powder (JIS conformity) was inhaled using the exit part 104 which has the opening pattern which arrange | positioned the slit shape of width 5mm at equal pitch in the suction air volume 1.5m < ³ > / min by an electric blower. This is a result of measuring the median particle diameter (μm) of the powder passing through the outlet 104. As is clear from the graph, it can be seen that the median particle diameter (μm) of the powder passing through the outlet portion 104 decreases as the rotational speed of the outlet portion 104 increases. If such characteristics are used, the pressure loss of the rotational speed of the outlet portion 104 is also reduced depending on the operating parameter conditions such as the suction air volume and speed of the electric blower and the rotational speed of the rotary motor 105, similarly to the opening pattern and rotation direction. What is necessary is just to adjust optimally with the specification of the vacuum cleaner main body 5 of a vacuum cleaner so that it may suppress and it will not have a bad influence on performance.

  As described above, according to the first embodiment, the outlet 104 is rotating at a higher speed than the swirling airflow in the swirl chamber 103, and the dust in the openings 104a and 104b of the outlet 104 is the cause of the reduction in the intake air volume. Adhesion can be eliminated, and obstruction of the openings 104a and 104b can be avoided, and the openings (many through holes) 104a and 104b of the outlet 104 of the cyclone 101 of the cyclonic vacuum cleaner. The risk of being blocked can be reduced, the intake air volume is not reduced, and high turning separation performance can be obtained.

Embodiment 2. FIG.
FIG. 6 is a schematic diagram of the characteristic portion of the cleaner body 5 of the electric vacuum cleaner according to Embodiment 2 of the present invention. In addition, the same code | symbol is attached | subjected to FIG. 2 or the equivalent part.
In the second embodiment, the outlet portion 104 of the cyclone unit 101 has an opening 104a in a part of the wall surface and has a structure capable of rotating the shaft, as in the first embodiment of FIG. The rotating shaft is arranged on the upper part of the swirl chamber 103 so that the rotation axis is in a direction orthogonal to the longitudinal axis direction of the swirl chamber 103. The outlet 104 is connected to the rotary motor 105 via a bearing and a coupling (both not shown), and can be rotated at a high speed of several tens of thousands to several hundred thousand rpm. Also in the second embodiment, the air separated from the dust in the swirl chamber 103 is sucked from the opening 104a to the electric blower (not shown) side.

  In the outlet portion 104 of the second embodiment, air is preferentially discharged from the opening 104a of the portion facing the space of the swirl chamber 103, and the effective opening area is narrowed. 2 passes through the opening 104a of the outlet 104 at a higher wind speed than the structure of FIG. 2 of the first embodiment.

  As described above, according to the second embodiment, by arranging the outlet portion 104 as shown in FIG. 6, the same effect as the structure described in the first embodiment can be obtained, and the cyclone type The risk that the opening 104a of the outlet portion 104 of the cyclone portion 101 of the vacuum cleaner is blocked can be reduced, and a high swirl separation performance can be obtained without a reduction in the intake air volume.

Embodiment 3 FIG.
FIG. 7 is a schematic diagram of a characteristic portion of the cleaner body 5 of the electric vacuum cleaner according to Embodiment 3 of the present invention. In addition, the same code | symbol is attached | subjected to FIG. 2 or the equivalent part.
In the third embodiment, a dust sensor 701 is arranged in an air passage located on the downstream side of the outlet portion 104. The dust sensor 701 is intended to detect dust particles contained in the air that has passed through the outlet portion 104.
The dust concentration of the dust-containing air may vary depending on the object to be cleaned and the environment. For example, when cleaning is performed such as sucking a large amount of fine powder, the concentration of fine dust may be extremely high. Conceivable. In such a case, the dust sensor 701 detects dust having a particle diameter of 1 μm or more with a numerical value exceeding a predetermined threshold concentration, and the control device 702 controls the number of rotations of the rotary motor 105 to control the outlet 104. Increase the number of revolutions. In this way, the rotational speed of the outlet 104 is controlled by monitoring the output of the dust sensor 701 so that the density of the passing dust is always below the threshold value. The dust sensor 701 can select any detection method, but preferably can detect a particle diameter of 1 μm or less.

  As described above, according to the third embodiment, the dust sensor 701 is arranged in the air passage located on the downstream side of the outlet portion 104, and the rotational speed of the outlet portion 104 is controlled by detecting the dust concentration. Therefore, it is possible to reduce the risk that the outlet part (many through holes) 104 of the cyclone part 101 of the cyclone type vacuum cleaner is blocked, and there is no reduction in the intake air volume, and high swirl separation performance can be obtained. it can.

Embodiment 4 FIG.
Next, the deodorizing function and the like of the cyclone unit 101 according to the first to third embodiments will be described as a fourth embodiment.
In this Embodiment 4, the surface of the exit part 104 of the cyclone part 101 has a deodorizing function, an antibacterial function, or both these functions.
Inside the swirl chamber 103, dust and dirt sucked in by cleaning are moved violently by the air flow, so that an odor is likely to be generated. Further, since it is not spatially shielded from the dust collection unit 107, odor generated from dust and dirt accumulated in the collection unit 107 may enter the swirl chamber 103. In the case of a conventional electric vacuum cleaner, these odors are discharged from the exhaust port to the outside of the machine, causing discomfort to the user and deteriorating indoor air quality.

  In this Embodiment 4, since the exit part 104 has a deodorizing function on the surface, when air passes, an odor can be adsorbed with high efficiency, and the adsorbed odor substance is decomposed and removed. Is done. The reason why high-performance removal is possible is that the exit portion 104 is turning at high speed, and the contact probability when the odorous substance passes is drastically increased, thereby achieving a high one-pass removal rate. Further, the problem that germs contained in dust adhere to the outlet portion 104 and deteriorate hygiene can be suppressed extremely effectively by imparting an antibacterial function to the surface of the outlet portion 104.

  As described above, according to the fourth embodiment, since the surface of the outlet portion 104 has a deodorizing function, the odor generated from the dust and dirt in the cyclone portion 101 and the collecting portion 107 of the cyclone type vacuum cleaner. Can be removed with high performance, and hygiene can be maintained by providing an antibacterial function.

  In the first to fourth embodiments described above, the description has focused on the features of the present invention. However, the present invention provides a dust case by opening a part of the peripheral wall of the swirl chamber 103, for example. In other words, the provision of the second cyclone portion on the downstream side of the outlet portion 104 is not excluded.

  DESCRIPTION OF SYMBOLS 1 Suction port body, 2 Suction pipe, 2a Handle, 3 Connection pipe, 4 Hose, 5 Vacuum cleaner main body, 10 Vacuum cleaner, 100 Dust collection chamber, 101 Cyclone part, 102 Inlet, 103 Swivel room, 104 Outlet part, 104a opening part, 105 rotation motor, 106 opening part, 107 collection part, 301 opening pattern, 401 wall, 701 dust sensor, 702 control device.

Claims (9)

An electric blower that generates a suction force;
A suction port body for sucking dust-containing air from the outside by suction force into the electric blower;
Arranged between the suction port body and the electric blower, provided with an inflow port, a swirl chamber, and an outlet portion, swirling the intake air flowing in from the inflow port by the swirl chamber, and separating the dust after the dust is separated A cyclone that exhausts from the outlet,
An opening formed in the longitudinal axis direction of the swirl chamber;
A collecting part provided adjacent to the opening and collecting dust separated in the swirl chamber;
The outlet portion is
A plurality of openings for discharging the intake air after the dust is separated;
An electric vacuum cleaner, which is rotatably supported on the upper part of the swirl chamber so as to be orthogonal to the longitudinal axis direction of the swirl chamber, and rotates at a higher speed than the swirl airflow of the swirl chamber. An electric blower that generates a suction force;
A suction port body for sucking dust-containing air from the outside by suction force into the electric blower;
Arranged between the suction port body and the electric blower, provided with an inflow port, a swirl chamber, and an outlet portion, swirling the intake air flowing in from the inflow port by the swirl chamber, and separating the dust after the dust is separated A cyclone that exhausts from the outlet,
An opening formed in the longitudinal axis direction of the swirl chamber;
A collecting part provided adjacent to the opening and collecting dust separated in the swirl chamber;
A dust sensor provided inside the air passage located downstream of the outlet portion;
With
The outlet portion is
A plurality of openings for discharging the intake air after the dust is separated;
A vacuum cleaner that is rotatably supported and rotates at a higher speed than the swirling airflow in the swirl chamber. The vacuum cleaner according to claim 2 , wherein the outlet portion is provided so as to protrude into the swirl chamber. 4. The electric vacuum cleaner according to claim 3 , wherein the outlet portion is disposed so as to extend substantially in parallel with a longitudinal axis direction of the swirl chamber. The outlet portion includes a protruding portion in which the opening is formed in a part of a side wall,
The vacuum cleaner according to claim 2, 3 or 4 , wherein the protruding portion has a substantially conical shape or a substantially conical shape as a part of the structure. The outlet portion includes a protruding portion in which the opening is formed in a part of a side wall,
The electric vacuum cleaner according to claim 2, 3 or 4 , wherein the protrusion has a substantially cylindrical shape or a substantially cylindrical shape as a part of the structure.   The vacuum cleaner according to any one of claims 1 to 6, wherein the opening of the outlet portion has a pattern shape arranged in a slit or dot shape. The vacuum cleaner according to any one of claims 1 to 7 , wherein the outlet portion includes a deodorizing means on a wall surface thereof. The vacuum cleaner according to any one of claims 1 to 8 , wherein the outlet portion includes antibacterial means on a wall surface thereof.

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