JP2006130034A - Centrifugal dust collector and vacuum cleaner using the same - Google Patents

Abstract

[PROBLEMS] To increase the rotational direction component of a swirling flow by a fixed blade installed in a separation chamber even when the force of a pumping or suction device is strong and the axial component of the flow velocity of the swirling flow generated in the branch chamber is large. A centrifugal dust collector is provided.
A centrifugal dust collecting apparatus according to the present invention has a substantially cylindrical inner shape structure, a separation chamber 4 that centrifuges dust from an air flow containing dust in a swirl flow C, and dust in the separation chamber 4. A suction port 2 through which an air flow A including the air flows A flows in a tangential direction, a dust collection chamber 5 that collects dust separated in communication with the separation chamber 4, and a centrifugal dust collector 1 that collects the air flow D separated from the dust. It has an exhaust pipe 7 that discharges to the outside, and has a configuration in which fixed blades are installed in the separation chamber 4 to increase the rotational direction component f of the flow velocity g of the swirling flow B. As a result, the swirling flow B in the separation chamber has a smaller flow area when swirling between the fixed blades, so that the flow velocity of the swirling flow B is increased and the axial component of the swirling flow B is weakened. The rotation direction component is converted to be large.
[Selection] Figure 1

Description

  The present invention relates to a centrifugal dust collector that separates dust from an air flow containing dust by centrifugal force of a swirling flow and collects only dust.

  Conventionally, this type of centrifugal dust collector is widely used in air cycle systems and cyclone type vacuum cleaners (see, for example, Patent Documents 1 and 2).

  21 and 22 show a conventional centrifugal dust collector described in Patent Document 1. FIG. As shown in FIGS. 21 and 22, the centrifugal dust collecting device 35 has an air inlet 2 that sucks an air flow A containing dust and an inner cylindrical structure along the air inlet 2. The separation chamber 4 that centrifuges dust from the air flow by the swirl flow B generated by swirling the dust, the dust collection chamber 5 that collects the separated dust, and the separation chamber 4 that collects the air flow D separated from the dust. There is disclosed a centrifugal dust collecting device constituted by an exhaust pipe 7 for discharging from the inside through the exhaust port 6 to the outside of the centrifugal dust collecting device 35.

In Patent Document 2, an air flow that goes straight by a swirl flow generating blade disposed inside a connection pipe is converted into a swirl flow, and fine dust is collected through an opening by a centrifugal force action generated in the swirl flow. There is disclosed a centrifugal dust collector configured to be fed into a chamber and further separate fine dust from air by a swirling flow in the dust collecting chamber for fine dust.
JP 2000-317349 A JP-A-8-322768

  However, in the conventional configuration, the centrifugal dust collector does not have a configuration in which the swirl flow in the separation chamber for separating fine dust is made stronger, that is, the rotational direction component of the generated swirl flow. Therefore, when the force of the pumping or suction device is strong and the axial component of the swirling flow is large, sufficient centrifugal separation effect cannot be obtained, and dust flows out from the exhaust port through the exhaust pipe. Had problems.

  The present invention solves the above-described conventional problem, and even when the axial component of the flow velocity of the generated swirling flow is large, the rotational direction component of the swirling flow can be increased by the fixed blade installed in the separation chamber. An object is to provide a centrifugal dust collector.

  In order to solve the above-described conventional problems, the centrifugal dust collector of the present invention includes a separation chamber that has a substantially cylindrical inner structure and centrifuges dust from an air flow containing dust in a swirling flow, and the separation An air inlet for allowing an air flow containing dust to flow into the chamber in a tangential direction, a dust collection chamber for collecting the dust communicated and separated to the separation chamber, and the dust disposed at a substantially central portion of the separation chamber; Having an exhaust pipe for discharging the separated air flow from the separation chamber to the outside of the centrifugal dust collector, and having a configuration in which fixed blades for increasing the rotational direction component of the flow velocity of the swirling flow are installed in the separation chamber It is.

  As a result, the swirl flow generated in the separation chamber flows along the fixed wings, and when the flow between the fixed wings, the flow area of the swirl flow is reduced, and the flow velocity of the swirl flow is increased. It is converted so that the axial component of the swirl flow is weakened and the rotational component is increased.

  The centrifugal dust collecting device of the present invention centrifuges dust from the air flow by increasing the flow velocity of the swirling flow of the air containing the dust sucked from the air inlet and increasing the rotational direction component of the swirling flow. Performance can be improved.

  According to a first aspect of the present invention, there is provided a separation chamber having a substantially cylindrical inner shape structure for centrifuging dust in a swirling flow from an air flow containing dust, and an intake air for causing the air flow containing the dust to flow into the separation chamber in a tangential direction A dust collecting chamber for collecting the dust separated and communicated with the separation chamber; and a centrifugal dust collecting device arranged in a substantially central portion of the separation chamber for separating an air flow separated from the dust from the separation chamber. In the centrifugal dust collector having an exhaust pipe that discharges to the outside, a swirl flow generated in the separation chamber is configured by installing a fixed blade for increasing the rotational direction component of the flow velocity of the swirl flow in the separation chamber. Since the flow area is reduced when flowing between fixed blades, the flow velocity is increased, and at the same time, it flows along the fixed blades, weakening the axial component of the swirling flow and increasing the rotational component. Can be converted to

  In the second invention, in particular, by using the fixed blade of the first invention as a centrifugal dust collector having the shape of an axial flow blade, the axial direction component of the swirl flow is set to the inclination angle of the blade of the axial flow blade. Accordingly, the rotation direction component can be converted.

  The third invention is an axial flow blade in which the axial component of the swirling flow is fixed in multiple stages by using a centrifugal dust collecting device having an axial flow blade in which the fixed blades of the first invention are fixed in multiple stages. The rotational direction component of the swirling flow that can overcome the pressure of the pressure feeding or suction device can be obtained by increasing the number of conversions according to the combination of the blade inclination angle and the number of blades. .

  In the fourth aspect of the invention, in particular, the fixed wing of the first aspect of the invention is a centrifugal dust collector having the shape of a spiral wing, so that the flow path of the swirling flow flowing along the wing becomes long, and thereby the swirling flow Since the time for converting the axial component of the swirl flow into the rotation direction component becomes longer, the rotation direction component of the swirl flow that overcomes the pressure of the pressure feeding or suction device can be obtained. Further, the collision of the swirling flow with the blades can be reduced, and the dust can be collected in the dust collecting chamber without clogging the dust such as cellophane which is easily clogged in the vicinity of the blade portion entrance with the axial flow blade.

  According to a fifth aspect of the present invention, in particular, the fixed blade according to the second to fourth aspects of the present invention is a centrifugal dust collecting device using an axial flow blade or a spiral blade with a variable inclination angle. It is also possible to adjust the flow path area of the swirl flow flowing between the blades by adjusting the inclination angle of the swirl, so the time for increasing the flow velocity of the swirl flow and the axial component of the swirl flow as the rotation direction component The conversion time can be controlled, and the centrifugal force required for dust collection can be stably obtained.

  According to a sixth aspect of the present invention, there is provided a centrifugal dust collecting device having a configuration in which the fixed blade of any one of the first to fifth aspects of the invention is fixed between the intake port and the exhaust pipe inlet in the separation chamber. Since all the air including dust that has been sucked in flows while passing through between the fixed blades, the effect of improving the centrifugal force of the fixed blades described in the first to fifth inventions can be maximized.

  According to a seventh aspect of the present invention, in particular, the rotation of the swirling flow generated in the separation chamber is achieved by using a centrifugal dust collector in which the fixed wing of any one of the first to fifth aspects of the invention is fixed near the exhaust pipe inlet in the separation chamber. In the vicinity of the exhaust pipe inlet where the directional component decreases, the swirling flow flows between the fixed blades, and the effect of improving the centrifugal force of the fixed blades described in the first to fifth inventions is obtained, and the pressure of the pumping or suction device is overcome. The rotational direction component of the swirling flow can be obtained.

  In an eighth aspect of the present invention, in particular, a centrifugal dust collecting device having a configuration in which the fixed wing according to any one of the first to seventh aspects of the present invention is installed only on the separation chamber wall side, thereby turning around the separation chamber wall having a high flow velocity. With respect to the flow, the axial component of the swirl flow can be weakened and converted so as to increase the rotational component.

  According to a ninth aspect of the present invention, there is provided a separation chamber that has a substantially cylindrical inner shape structure and centrifugally separates dust from an air flow including dust, and an intake air that causes the air flow including dust to flow into the separation chamber in a tangential direction. A dust collecting chamber for collecting the dust separated and communicated with the separation chamber; and a centrifugal dust collecting device arranged in a substantially central portion of the separation chamber for separating an air flow separated from the dust from the separation chamber. In a centrifugal dust collector having an exhaust pipe that discharges to the outside, it is generated in the separation chamber by forming a concave and convex shape that increases the rotational direction component of the flow velocity of the swirl flow on the separation chamber wall. The swirl flow thus flows along the concave and convex inner wall surface, and the axial component of the swirl flow can be weakened and converted so as to increase the rotation direction component in the same manner as when the fixed blades are installed.

  In the tenth aspect of the invention, in particular, the centrifugal dust collector according to any one of the first to ninth aspects is provided in the main body of the electric vacuum cleaner, so that the suction force is independent of the suction force of the vacuum cleaner. It is possible to develop a cyclone type vacuum cleaner that is strong and has high dust collection performance.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a longitudinal sectional view of a centrifugal dust collector according to a first embodiment of the present invention, and FIG. 2 is a plan view thereof.

  1 and 2, the centrifugal dust collector 1 is disposed at the upper end of the centrifugal dust collector 1, and an air flow A including dust is caused to flow into the centrifugal dust collector 1 in a tangential direction so as to generate a swirl flow B. The generated inlet 2, the axial flow blade 3 a that increases the flow velocity of the swirl flow B and increases the rotation direction component of the swirl flow B, and the swirl flow whose rotation direction component is increased by the axial flow blade 3 a A substantially cylindrical separation chamber 4 for centrifuging dust from an air flow containing dust at C, a dust collection chamber 5 for collecting the separated dust, and a substantially central portion of the separation chamber 4 to separate the dust. The exhaust air flow D is formed from an exhaust pipe 7 for discharging the air flow D from the separation chamber 4 through the exhaust port 6 to the outside of the centrifugal dust collector 1. Here, the axial flow blade 3 a is provided between the intake port 2 and the exhaust pipe inlet 8 in the separation chamber 4.

  FIG. 3 is a schematic diagram showing the axial direction component and the rotational direction component of the flow velocity of the swirling flow.

  As shown in FIG. 3, the flow velocity a of the swirling flow E is divided into two components, an axial component b and a rotational component c.

  In particular, the rotational direction component c of the swirling flow E greatly affects the centrifugal separation performance.

  FIG. 4 is a perspective view of a main part of the axial flow blade fixed to the exhaust pipe in the separation chamber.

  FIG. 5 is a schematic view showing the inclination angle of the blades of the axial flow blade.

  In FIG. 5, the inclination angle d indicates the angle of the axial flow blade 3a with respect to the axial direction of the swirling flow.

  The operation and action of the centrifugal dust collector configured as described above will be described below.

  First, the air flow A containing dust sucked into the air inlet 2 flows along the inner wall surface of the substantially cylindrical separation chamber 4 along the air inlet 2 to generate a swirl flow B.

  FIG. 6 is a schematic diagram showing a swirling flow near the axial flow blade.

  In FIG. 6, the generated swirling flow B flows along the axial flow blade 3a installed in the separation chamber 4, and the axial component e of the flow velocity of the swirling flow B according to the inclination angle d of the blade of the axial flow blade 3a. Is weakened and converted into a rotation direction component f. Further, when the swirling flow B flows between the blades of the axial flow blades 3a, the flow path area is reduced, so that the flow velocity g of the swirling flow B is increased and the swirling flow C is generated. The swirling flow C generated in this manner is used to centrifuge the dust from the air flow including the dust and collect the dust in the dust collecting chamber 5. The separated clean air flow D passes through the exhaust pipe inlet 8 in the separation chamber 4, passes through the exhaust outlet 6, and is discharged out of the centrifugal dust collector 1.

  It is important for the axial flow blade 3a to appropriately select the number of blades and the inclination angle d according to the flow velocity g of the swirl flow B. When the blade inclination angle d is increased, the direction of the blade approaches perpendicular to the axial direction, so that the ratio of the axial component of the swirling flow B generated in the separation chamber 4 to the rotational direction component increases. Further, when the number of blades is increased, the turbulence of the swirl flow B flowing between the blades can be reduced, the flow path area can be reduced, and the effect of increasing the swirl flow B can be increased.

  As described above, in the present embodiment, by fixing the axial flow blade 3a in the separation chamber 4, the flow velocity g of the swirling flow B generated in the separation chamber 4 is increased, and the rotation of the swirling flow B is increased. By increasing the directional component and centrifuging the dust by the generated swirling flow C, sufficient centrifugal separation performance can be obtained even when the force of the pressure feeding or suction device is strong and the axial component of the swirling flow is large. be able to.

  In this embodiment, as shown in FIG. 7, by using the centrifugal dust collector 9 in which the axial flow blade 3a is fixed near the exhaust pipe inlet 8, the swirling flow 4 flows between the axial flow blades 3a. Thus, the centrifugal separation performance near the exhaust pipe inlet 8 where the rotational direction component f of the swirl flow B increases and the rotational direction component of the swirl flow B decreases can be improved.

(Embodiment 2)
The centrifugal dust collector in the second embodiment of the present invention is the same as that of the first embodiment of the present invention shown in FIGS. 1 and 2, and the axial flow blade 3a is provided with two stages of axial flow blades 3b. Except for the above, the same configuration is provided, and the same configuration is denoted by the same reference numeral and detailed description thereof is omitted.

  FIG. 8 shows a perspective view of a main part of the two-stage axial flow blade 3b fixed to the exhaust pipe 7 in the separation chamber 4 of the centrifugal dust collector in the second embodiment of the present invention.

  The operation and action of the centrifugal dust collector with the axial flow blade 3b fixed as described above will be described below.

  First, since the swirl flow B formed from the air flow A containing dust sucked into the air inlet 2 flows twice continuously between the axial flow blades 3b, the speed of the swirl flow B is increased and the axial direction is increased. The frequency | count of converting the component e into the rotation direction component f increases, and the improvement effect of the rotation direction component of the swirl | vortex flow B which flows through the axial flow blade 3b can be enlarged. Further, the rotational direction component of the swirling flow that can be converted into the rotational direction component at each stage according to the combination of the inclination angle and the number of blades of the axial flow blade 3b to be fixed, and can overcome the pressure of the pressure feeding or suction device can be obtained. it can.

  In this embodiment, the case where two stages of axial flow blades are installed has been described. However, the present invention is not limited to two stages, and it goes without saying that the same effect can be obtained when two or more stages are installed.

(Embodiment 3)
The centrifugal dust collector in the third embodiment of the present invention has the same configuration as that of the first embodiment of the present invention shown in FIG. 1 except that the axial flow blade 3a is a spiral blade 10a. The same components are denoted by the same reference numerals, and detailed description thereof is omitted.

  FIG. 9 is a perspective view showing a main part of a spiral blade fixed to the exhaust pipe in the separation chamber according to the third embodiment of the present invention.

  In FIG. 9, reference numeral 10a denotes a spiral wing of one round.

  FIG. 10 is a schematic diagram showing the inclination angle of the blades of the spiral wing. In FIG. 10, the inclination angle h indicates the angle of the spiral blade 10a with respect to the axial direction of the swirling flow.

  The operation and action of the centrifugal dust collector with the helical blade 10a fixed as described above will be described below.

  First, the swirl flow B formed from the air flow A containing dust sucked into the air inlet 2 flows along the spiral blade 10a, and the axial component e of the swirl flow B is the inclination angle of the spiral blade 10a. It is converted into a rotation direction component according to h. Since the flow path of the swirl flow that flows along the blade is longer than that of the axial flow blade, the time required to increase the flow velocity of the swirl flow B and convert the axial component e into the rotational component f is increased. The rotational direction component f of the flow B can be greatly increased. Further, in the spiral blade 10a, the swirl flow B becomes only a collision at the inlet of the spiral blade 10a, and the number of collisions can be reduced and a stable flow can be formed. Further, in the axial flow blade, dust such as cellophane that is easily clogged in the vicinity of the blade inlet can be collected in the dust collection chamber 5 without clogging.

  As described above, in this embodiment, the swirl flow generated in the separation chamber 4 by fixing the spiral blade 10 a for increasing the rotational direction component f of the flow velocity g of the swirl flow B in the separation chamber 4. By centrifuging the dust by the swirling flow C generated by increasing the flow velocity g of B and increasing the rotational direction component f of the swirling flow B, the force of the pressure feeding or suction device is strong, Even when the axial component e is large, sufficient centrifugal separation performance can be obtained.

  In this embodiment, the case where one round spiral blade is installed has been described. However, as shown in FIG. 11, in the case of two round spiral blades 10b fixed to the exhaust pipe in the separation chamber or two or more round spiral blades. However, the same effect can be obtained.

(Embodiment 4)
The centrifugal dust collector in the fourth embodiment of the present invention is the same as that of the first embodiment of the present invention shown in FIG. 1, and the axial flow blade 3a is an axial flow blade or spiral blade having a variable inclination angle. Other than the above, the components have the same configuration, and the same components are denoted by the same reference numerals and detailed description thereof is omitted.

  The operation and action of the centrifugal dust collecting apparatus having the variable tilt angle axial flow blade or the spiral blade fixed as described above will be described below.

  First, the swirl flow B formed from the air flow A containing dust sucked into the air inlet 2 flows along the axial flow blade or the spiral blade having a variable inclination angle, and the axial component e of the swirl flow B Is converted into a rotation direction component f according to the inclination angle of the axial flow blade or spiral blade with variable inclination angle.

  There are two methods for adjusting the tilt angle of the axial flow blade or the spiral blade having a variable tilt angle and a method for switching automatically. When switching manually, the flow velocity of the air flow A including dust sucked from the intake port 2 is measured using a heat flow rate sensor attached near the intake port 2, and the inclination angle is set according to the measured flow velocity. Switch with the manual knob.

  In addition, when an extension pipe is attached to the exhaust port 6 of the centrifugal dust collector and the air flow A containing dust is sucked into the centrifugal dust collector from the intake port 2 using the suction device, the operation mode of the suction device is used. The operator can adjust the tilt angle of the axial flow blade or the spiral blade with a manual knob according to the three levels (for example, strong, medium and weak), and stabilize the necessary centrifugal force according to the strength of the suction force. The performance of centrifuging dust from an air flow can be improved.

  In addition, if the control system can automatically adjust the tilt angle of the axial flow blade or spiral blade by operating the operation mode button of the hand control unit, the centrifugal dust collector can be remotely operated, In addition to the above effects, usability is also improved.

  On the other hand, in the case of fully automatic control, the flow velocity of the swirl flow necessary for centrifuging the target dust from the air flow in advance is measured using a thermal flow velocity sensor or LDV, and sucked from the intake port 2. Based on the correlation between the inclination angle of the axial flow blade or the spiral blade and the flow velocity of the swirl flow C with respect to the flow velocity of the air flow A containing dust, the inclination angle is automatically controlled according to the flow velocity of the air flow A containing dust.

  As described above, in the present embodiment, in order to increase the rotational direction component f of the flow velocity of the swirling flow B in the separation chamber 4, either the axial flow blade or the spiral blade having a variable inclination angle is fixed, so In addition, the inclination angle is adjusted according to the capacity of the suction device and the flow passage area of the swirling flow flowing between the blades can be adjusted, so that the flow velocity g of the swirling flow B is increased and the swirling flow B The time for converting the axial component e to the rotational component f can be controlled, and the centrifugal force required to centrifuge the dust from the air flow C can be stably obtained.

  In the first to fourth embodiments, the case where the fixed blade is fixed to the exhaust pipe 7 has been described. However, the fixing blade is not limited to this fixing method, and may be fixed to the inner wall of the separation chamber 4. As long as the blades can be fixed, and the fixed blade is provided in at least one of the exhaust pipe 7 and the inner wall of the separation chamber 4, the same effect as described above can be obtained.

(Embodiment 5)
The centrifugal dust collector in the fifth embodiment of the present invention includes a third embodiment of the present invention shown in FIG. 1 and a spiral blade 10c in which the spiral blade 10a is fixed only on the separation chamber wall side. Except for the above, the same configuration is provided, and the same configuration is denoted by the same reference numeral and detailed description thereof is omitted.

  FIG. 12: shows the perspective view of the principal part cross section of the centrifugal dust collector in the 5th Embodiment of this invention. In FIG. 12, only the spiral blade 10c, the exhaust pipe 7, the separation chamber 4, and the dust collection chamber 5 are illustrated.

  The operation and action of the centrifugal dust collector having the spiral blade 10c as described above will be described below.

  First, the flow velocity a of the swirl flow B formed from the air flow A containing dust sucked into the intake port 2 is the highest in the outer peripheral portion, that is, in the vicinity of the inner wall of the separation chamber 4 from the center in the separation chamber 4. By fixing the blade 10c only on the inner wall side of the separation chamber 4, it is possible to weaken the axial component of the swirling flow near the inner wall of the separation chamber 4 where the flow velocity is high, and to convert the rotational component further.

(Embodiment 6)
13 and 14 are longitudinal sectional views of a centrifugal dust collecting apparatus according to the sixth embodiment of the present invention.

  The centrifugal dust collector in the sixth embodiment of the present invention is the same as that of the first embodiment of the present invention shown in FIG. 1 except that a stepped wall structure is provided in the separation chamber, and the fixed wing is removed. Except for the configuration, the configuration is the same, and the same configuration is denoted by the same reference numeral and detailed description thereof is omitted.

  13 and 14, the centrifugal dust collector 11 is arranged at the upper end of the centrifugal dust collector 11, and an air flow A containing dust is caused to flow into the centrifugal dust collector 11 in a tangential direction so as to generate a swirl flow B. The stepped inner wall structure 12 having a stepwise decreasing diameter toward the direction of the descending axis component of the swirling flow is generated and the rotational direction component f of the swirling flow B is increased by the stepped inner wall structure 12. The separation chamber 13 that centrifuges the dust from the air flow including dust in the swirling flow C, the dust collection chamber 5 that collects the separated dust, and the separation chamber 4 that is disposed substantially at the center of the separation chamber 4 is separated from the dust. The exhaust pipe 7 discharges the air flow D from the separation chamber 13 to the outside of the centrifugal dust collector 11 through the exhaust port 6.

  The operation and action of the centrifugal dust collector 11 having the separation chamber 13 as described above will be described below.

  First, the air flow A containing dust sucked into the air inlet 2 flows along the inner wall surface of the substantially cylindrical separation chamber 13 along the air inlet 2 to generate a swirl flow B. The generated swirl flow B flows along the stepped inner wall structure 12 whose diameter decreases stepwise toward the direction of the descending axis component of the swirl flow, and the axial component e of the flow velocity of the swirl flow B is weakened and the rotation direction. The swirl flow C is generated by being converted into the component f. The swirling flow C generated in this manner is used to centrifuge the dust from the air flow including the dust and collect the separated dust in the dust collecting chamber 5. The separated clean air flow D passes through the exhaust pipe inlet 8 in the separation chamber 13, passes through the exhaust outlet 6, and is discharged out of the centrifugal dust collector 11.

  As described above, in the present embodiment, by providing the stepped inner wall structure 12 in the separation chamber 13, only the swirling flow near the inner wall of the separation chamber 13 having a high flow velocity as in the fifth embodiment can be obtained. The centrifugal force can be improved by weakening and converting to a rotational direction component f. Moreover, since no fixed wing is required, the structure of the centrifugal dust collector can be simplified and the weight can be reduced.

  In this embodiment, the centrifugal dust collector having a stepped stepped inner wall structure is installed in the separation chamber, but even when the stepped stepped inner wall structure has a spiral groove structure. Similar effects can be obtained.

  Further, in addition to the above embodiment, the centrifugal dust collector 16 having a configuration in which the convex portion 15 on the ring is provided on the inner wall surface of the separation chamber 14 as shown in FIGS. 15 and 16, and the exhaust as shown in FIG. A centrifugal dust collector 19 having a configuration in which the pipe 17 is extended from the body of the separation chamber 18, a centrifugal dust collector 22 having a configuration in which the diameters of the separation chamber 20 and the dust collection chamber 21 are equal as shown in FIG. Is mentioned.

(Embodiment 7)
FIG. 19 is a schematic diagram showing the configuration of the upright type vacuum cleaner 23 according to the seventh embodiment of the present invention.

  In FIG. 19, the vacuum cleaner 23 has a suction fan motor 25 built in the vacuum cleaner body 24, and a main body inlet 28 for connecting a hose 27 equipped with a nozzle 26 on the suction side of the vacuum cleaner body 24 is formed. An air inlet 30 of the centrifugal dust collector 29 according to any one of claims 1 to 9 is connected to the main body air inlet 28, and an air outlet 31 is provided with a vent hole in the air blowing chamber 32 provided with the suction fan motor 25. It connects via the partition wall 33 which has.

  About the vacuum cleaner which has the above structures, the operation | movement and an effect | action are demonstrated below.

  First, the suction fan motor 25 is driven to bring the centrifugal dust collector 29 into a negative pressure state, and the air flow F including dust sucked by the nozzle 26 is sucked into the centrifugal dust collector 29 through the hose 27. The The dust is separated from the air flow by the centrifugal force of the swirling flow in the separation chamber, and only the dust is collected in the dust collection chamber. The separated air flow G is sucked into the suction fan motor 25 through the partition wall 33.

  In many cases, the suction force of the vacuum cleaner can be switched manually or discontinuously, and the operator selects the suction force of the vacuum cleaner by hand operation to perform cleaning. When the operator selects a mode with a strong suction force, the axial component of the swirling flow generated in the separation chamber is increased by the strong suction force of the suction fan motor 25 installed in the blower chamber 32. The rotational direction component of the swirling flow is increased and high dust collection performance can be obtained by the fixed blades installed in the separation chamber described in ˜6 or the inner structure having the irregular shape of the separation chamber.

  As described above, in the present embodiment, by installing the centrifugal dust collecting device 29 of the present invention in the electric vacuum cleaner main body 23, a cyclone type having a strong suction force and high dust collecting performance of the vacuum cleaner. A vacuum cleaner can be developed.

  In this embodiment, the case where the centrifugal dust collecting device is installed in the upright type vacuum cleaner has been described. However, the same effect can be obtained when the centrifugal dust collecting device is installed in the canister type vacuum cleaner 34 as shown in FIG. Is obtained.

  As described above, the centrifugal dust collector according to the present invention can increase the rotational direction component of the swirl flow even when the axial component of the flow velocity of the swirl flow is large. It can be applied to applications such as a centrifuge, a recycling centrifuge, and an air cycle system.

The longitudinal cross-sectional view of the centrifugal dust collector in 1st, 2nd, 3rd, 4th, 5th, 6th embodiment of this invention The top view of the centrifugal dust collector in the 1st, 2nd embodiment of this invention Schematic showing the directional component of the swirl | vortex flow of the centrifugal dust collector in the 1st Embodiment of this invention Perspective view of the main part of the axial flow blade of the centrifugal dust collector Schematic showing the inclination angle of the blade of the axial flow blade of the centrifugal dust collector Schematic representing the swirl flow near the axial flow blade of the centrifugal dust collector Vertical section of the centrifugal dust collector The perspective view of the principal part of the two-stage installation axial flow blade of the centrifugal dust collector in the second embodiment of the present invention The principal part perspective view of the spiral blade of the centrifugal dust collector in the 3rd Embodiment of this invention Schematic representing the inclination angle of the spiral blade of the centrifugal dust collector Perspective view of the main part of the spiral wing of two rounds fixed to the exhaust pipe in the separation chamber of the centrifugal dust collector The perspective view which showed the waist | hip | lumbar part cross section of the centrifugal dust collector in the 5th Embodiment of this invention The longitudinal cross-sectional view of the centrifugal dust collector in the 6th Embodiment of this invention Cross-sectional view of the centrifugal dust collector The longitudinal cross-sectional view of the centrifugal-force dust collector in other embodiment of this invention Cross-sectional view of the centrifugal dust collector Vertical section of the centrifugal dust collector Vertical section of the centrifugal dust collector The cross-sectional view of the upright type vacuum cleaner using the centrifugal dust collector in the seventh embodiment of the present invention Cross-sectional view of a canister-type vacuum cleaner using the centrifugal dust collector Vertical section of a conventional centrifugal dust collector Top view of the centrifugal dust collector

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Centrifugal dust collector 2 Intake port 3a Axial flow blade 3b Axial flow blade (two stages)
4 Separation chamber 5 Dust collection chamber 6 Exhaust port 7 Exhaust pipe 8 Exhaust tube inlet 9 Centrifugal dust collector 10a Spiral blade (1 round)
10b Spiral wing (2 laps)
DESCRIPTION OF SYMBOLS 10c Spiral blade 11 Centrifugal dust collector 12 Stepped inner wall structure 13 Separation chamber 14 Separation chamber 15 Ring-shaped convex part 16 Centrifugal dust collector 17 Exhaust pipe 18 Separation chamber 19 Centrifugal dust collector 20 Separation chamber 21 Dust collection Chamber 22 Centrifugal dust collector 23 Vacuum cleaner (upright type)
24 Vacuum Cleaner Body 25 Suction Fan Motor 26 Nozzle 27 Hose 28 Main Body Inlet 29 Centrifugal Dust Collector 30 Inlet 31 Exhaust 32 Blower Chamber 33 Partition Wall 34 Electric Vacuum Cleaner (Canister Type)
35 Centrifugal force dust collector

Claims (10)

A separation chamber having a substantially cylindrical inner shape structure for centrifugally separating dust from an air flow containing dust, a suction port for causing the air flow containing dust to flow into the separation chamber in a tangential direction, and the separation chamber A dust collection chamber for collecting the dust separated and communicated with the exhaust, and an exhaust pipe disposed at a substantially central portion of the separation chamber for discharging an air flow separated from the dust from the separation chamber to the outside of the centrifugal dust collector A centrifugal dust collector having a configuration in which fixed blades for increasing the rotational direction component of the flow velocity of the swirling flow are installed in the separation chamber. The centrifugal dust collector according to claim 1, wherein the fixed blade has an axial flow blade shape. The centrifugal dust collector according to claim 1, wherein the fixed blade is an axial flow blade fixed in multiple stages. The centrifugal dust collector according to claim 1, wherein the fixed wing has a spiral wing shape. The centrifugal dust collector according to any one of claims 2 to 4, wherein the fixed blade is an axial flow blade or a spiral blade having a variable inclination angle. The centrifugal dust collector according to any one of claims 1 to 5, wherein the fixed blade is fixed at least between the air inlet and the exhaust pipe inlet in the separation chamber. The centrifugal dust collector according to any one of claims 1 to 5, wherein the fixed wing is fixed in the vicinity of the exhaust pipe inlet in the separation chamber. The centrifugal force dust collector according to any one of claims 1 to 7, wherein the fixed blade is fixed only to the separation chamber wall side. A separation chamber having a substantially cylindrical inner shape structure for centrifugally separating dust from an air flow containing dust, a suction port for causing the air flow containing dust to flow into the separation chamber in a tangential direction, and the separation chamber A dust collection chamber that collects the dust separated and communicated with the exhaust chamber, and an exhaust pipe that is disposed substantially at the center of the separation chamber and that discharges an air flow separated from the dust from the separation chamber to the outside of the centrifugal dust collector The centrifugal dust collector which has the uneven | corrugated shape which increases the rotation direction component of the flow velocity of a swirl | vortex flow in the said separation chamber wall in the centrifugal dust collector which has. The vacuum cleaner of the structure which has the centrifugal dust collector of any one of Claims 1-9 in the main body.

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