TW201446210A - Cyclone separation device and electric cleaner using the same - Google Patents

Abstract

To provide a cyclone separation device that efficiently separates dust, with dust-containing air swirling in a swirl chamber, and reduces flow noise that occurs when separating relatively bulky dust, and an electric cleaner loaded with the cyclone separation device. An inlet port 212 from which dust-containing air from an external air course flows in, a swirl chamber 218 that is formed into a substantially cylindrical shape, causes the dust-containing air that flows therein from the inlet port 212 to swirl to separate air and dust, a dust collection chamber 235 outside the side wall, which stores the dust separated from the dust-containing air via a side wall opening portion 213 that opens to a side wall 211a of an upper cylindrical portion 211 of the swirl chamber 218, and an exhaust port 244 from which the air separated from the dust-containing air in the swirl chamber is discharged, and the side wall opening portion 213 is provided with a rib 220 that suppresses wind noise of air flow that passes through the side wall opening portion 213.

Description

Cyclone separation device and electric vacuum cleaner using the cyclone separation device

The present invention relates to a cyclone separation device and an electric vacuum cleaner using the cyclone separation device, and more particularly to a reduction in noise of the cyclone separation device.

In a general cyclone separation device, dusty air flowing to the cyclone separation device is separated into dust and clean air by centrifugal force in a rotating chamber. The separated dust is collected in the dust collecting chamber, and the clean air is discharged from the cyclone after passing through the discharge pipe. At this time, since the wind speed of the whirling airflow in the rotating chamber or the discharge pipe is large, noise due to the swirling airflow becomes a problem. In order to reduce this noise, a technique for suppressing spoilage in a rotating chamber (including a communicating air passage that communicates with a dust collecting chamber) or in a discharge pipe is disclosed.

For example, Patent Document 1 discloses a noise reduction rib that protrudes from the inner wall of the discharge pipe toward the center and includes a curved portion and a straight portion. Further, Patent Document 2 discloses a cyclone separating device that is provided with a vibration preventing rib on a discharge pipe to reduce vibration noise caused by vibration of the dust-containing air rotating in the rotating chamber. Further, Patent Document 3 discloses an electric vacuum cleaner in which a serration is provided in a communication port from the whirling chamber to the dust collecting chamber.

[Prior patent documents] [Patent Literature]

[Patent Document 1] JP-A-2006-55622

[Patent Document 2] JP-A-2011-212172

[Patent Document 3] Patent No. 4331656

However, the conventional techniques disclosed in Patent Document 1 and Patent Document 2 include a dust moving path from the whirling chamber to the dust collecting chamber or a zero-order opening provided for separating relatively large dust in the dust-containing air. The cyclone separation device does not sufficiently measure the airflow noise generated from the dust moving passage or the zero-order opening.

Further, Patent Document 3 discloses that the serrations are provided in the communication port from the whirling chamber to the dust collecting chamber. However, since they are installed in the middle of the air path of the dust-containing air, they are caused by seizure or pressure loss of hair or dust. The countermeasures such as the increase in noise are not sufficient.

In addition, the cyclone separating device having the 0th opening portion for separating the relatively large dust from the dust-containing air rotating in the rotating chamber has a gas flow having a peak at a specific frequency component when the dust-containing air passes through the 0-time opening portion. The subject of noise.

The present invention has been made to solve the above problems, and an object of the invention is to provide a cyclone separation device and an electric vacuum cleaner using the cyclone separation device, which is capable of reducing a large separation body by dusty air rotating in a rotating chamber. The airflow noise generated when the dust is at the 0th opening, and the jam or pressure loss of the dust at the 0th opening is suppressed.

The cyclone separating device of the present invention comprises: an inflow port into which dusty air from an external air path flows; and a whirling chamber formed in a substantially cylindrical shape to rotate the dusty air flowing in from the inflow port to separate the air and The dust collecting chamber of the side wall is provided with dust separated from the dust-containing air through the opening of the side wall of the side wall of the cylindrical portion of the rotating chamber; and the discharge port is discharged from the dust-containing air from the rotating chamber Separated air; a rib that suppresses wind noise of the airflow passing through the opening of the side wall is provided in the side wall opening.

According to the cyclone separating apparatus and the electric vacuum cleaner using the cyclone separating apparatus of the present invention, by adopting the above configuration, wind noise of the airflow passing through the side wall opening portion can be suppressed.

1‧‧‧Electric vacuum cleaner

2‧‧‧Sucking hose

3‧‧‧Connecting tube

4‧‧‧ suction tube

5‧‧‧Inhalation body

21‧‧‧Hose end

31‧‧‧Hands

32‧‧‧Operation switch

100‧‧‧ vacuum cleaner body

101‧‧‧Power cord

102‧‧‧Electric blower

103‧‧‧Hose connection

104‧‧‧ Cyclone separation device connection port

105‧‧‧ suction pipe

106‧‧‧ vacuum cleaner body connection port

107‧‧‧ Wheels

108‧‧‧ casters

109‧‧‧ Vacuum cleaner body handle

110‧‧‧ Cyclone Separator

111‧‧‧Handle accommodating department

200‧‧‧Cyclone separation device

201‧‧‧Cyclone separation device handle

210‧‧‧Rotary box

211‧‧‧ upper cylindrical part

211a‧‧‧ sidewall

211b‧‧‧Flange

212‧‧‧Inlet

213‧‧‧ Side wall opening

214‧‧‧ lower cylindrical part

214a‧‧‧Bottom opening

215‧‧‧Cone

215a‧‧‧ openings

218‧‧‧ rotating room

219‧‧‧Cone outside dust collecting chamber

220‧‧‧ rib

221‧‧‧ tip

222‧‧‧ nicks

223‧‧‧ rib

223a‧‧‧峰部

223b‧‧‧谷部

230‧‧‧dust collection box

231‧‧‧ outer wall

232‧‧‧ bottom

232a‧‧‧ wall section

233‧‧‧ upper end

234‧‧‧ Sealing members

235‧‧‧Side wall dust chamber

240‧‧‧Export box

241‧‧‧Draining tube

241a‧‧‧Cylinder

241b‧‧‧Cone

241c‧‧‧micropores

242‧‧‧ Cover

243‧‧‧Draining tube

244‧‧‧Export

Fig. 1 is a perspective view showing an electric vacuum cleaner according to a first embodiment of the present invention.

Fig. 2 is a perspective view showing the cleaner body of the electric vacuum cleaner according to the first embodiment of the present invention.

Fig. 3 is a top view showing the cleaner body of the electric vacuum cleaner according to the first embodiment of the present invention.

Fig. 4 is a cross-sectional view showing the cleaner body of Fig. 3 of the electric vacuum cleaner according to the first embodiment of the present invention.

Fig. 5 is a perspective view showing the cleaner body of the electric vacuum cleaner according to the first embodiment of the present invention (the state in which the cyclone separation device has been removed).

Fig. 6 is a top view showing a cyclone separation apparatus according to a first embodiment of the present invention.

Fig. 7 is a bottom view showing the cyclone separation apparatus according to the first embodiment of the present invention.

Fig. 8 is a cross-sectional view taken along line B-B of the cyclone separation apparatus of Fig. 6 according to the first embodiment of the present invention.

FIG. 9 is a view showing a configuration of a rib provided in a side wall opening portion of a main portion of the cyclone separating apparatus according to the first embodiment of the present invention (a state in which the dust collecting portion box has been removed).

Fig. 10 is a cross-sectional view along line C-C of the cyclone separation apparatus of Fig. 9 according to the first embodiment of the present invention.

Fig. 11 is a view showing a configuration of a rib provided in a side wall opening portion of a main portion of a cyclone separating apparatus according to a second embodiment of the present invention (a state in which the dust collecting portion box has been removed).

Fig. 12 is a view for explaining the effects of the cyclone separation device according to the first embodiment and the second embodiment of the present invention.

Fig. 13 is a view for explaining the effects of the cyclone separation device according to the first embodiment and the second embodiment of the present invention.

Fig. 14 is a view for explaining the effects of the cyclone separation device according to the first embodiment of the present invention.

Fig. 15 is a view for explaining the effects of the cyclone separation device according to the first embodiment of the present invention.

Fig. 16 is a view for explaining the effects of the cyclone separation device shown in the second embodiment of the present invention.

Fig. 17 is a view for explaining the effects of the cyclone separation device shown in the second embodiment of the present invention.

First embodiment

Fig. 1 is a perspective view showing the electric vacuum cleaner of the first embodiment. Fig. 2 is a perspective view showing the cleaner body of the electric vacuum cleaner according to the first embodiment of the present invention. Fig. 3 is a top view showing the cleaner body of the electric vacuum cleaner according to the first embodiment of the present invention. Fig. 4 is a cross-sectional view showing the cleaner body of Fig. 3 of the electric vacuum cleaner according to the first embodiment of the present invention. Fig. 5 is a perspective view showing the cleaner body of the electric vacuum cleaner according to the first embodiment of the present invention (the state in which the cyclone separation device has been removed). Fig. 6 is a top view showing a cyclone separation apparatus according to a first embodiment of the present invention. Fig. 7 is a bottom view showing the cyclone separation apparatus according to the first embodiment of the present invention. Fig. 8 is a cross-sectional view taken along line B-B of the cyclone separation apparatus of Fig. 6 according to the first embodiment of the present invention. FIG. 9 is a view showing a configuration of a rib provided in a side wall opening portion of a main portion of the cyclone separating apparatus according to the first embodiment of the present invention (a state in which the dust collecting portion box has been removed). Fig. 10 is a cross-sectional view along line C-C of the cyclone separation apparatus of Fig. 9 according to the first embodiment of the present invention. In addition, in the respective drawings, the same reference numerals are attached to the same parts. Fig. 12 is a view for explaining the effects of the cyclone separation device according to the first embodiment and the second embodiment of the present invention. Fig. 13 is a view for explaining the effects of the cyclone separation device according to the first embodiment and the second embodiment of the present invention. Fig. 14 is a view for explaining the effects of the cyclone separation device according to the first embodiment of the present invention. Fig. 15 is a view for explaining the effects of the cyclone separation device according to the first embodiment of the present invention.

Hereinafter, description will be made using Figs. 1 to 10 and Figs. 12 to 15.

The vacuum cleaner 1 shown in the first embodiment is a suction hose 2 to which the cleaner body 100 and the hose end portion 21 are connected to the cleaner body 100, and a connecting pipe 3 whose one end is connected to the other end of the suction hose 2, and one end thereof. A suction pipe 4 connected to the other end of the connecting pipe 3 and a suction port body 5 connected to the other end of the suction pipe 4.

Hereinafter, in the cleaner body 100, the direction in which the suction hose 2 is connected is defined as the front, the opposite direction is defined as the rear, and the front and rear directions are defined, and the right and left directions are defined as right and left, respectively, toward the front.

The suction hose 2 is composed of a member having a flexible bellows shape.

The connecting pipe 3 is constituted by a cylindrical member bent on the way, and is provided with a handle 31 for gripping the person to hold the operation. An operation switch 32 for controlling an operation such as driving start, stop, and output adjustment of the electric blower 102 to be described later is provided in the handle 31.

The suction port body 5 is for sucking dust (dust) on the cleaning surface together with the air from the opening formed downward, and has a rotating brush (not shown) for scraping dust such as a floor surface or a carpet of the surface to be cleaned. .

Further, a wire (not shown) is disposed inside the suction hose 2, the connection pipe 3, the suction pipe 4, and the suction port body 5, and transmits a control signal from the operation switch 32 or electric power from the cleaner body 100 to the cleaner body. 100 or a rotating brush of the suction port body 5.

(vacuum cleaner body)

In the vacuum cleaner body 100, built-in borrowing from a commercial power source via a power cord The electric power supplied from 101 generates an electric blower 102 that attracts wind (see Fig. 4). In this way, the electric blower 102 is detachably attached to the cleaner body 100 from the cyclone separator 200 that separates the dust and the clean air from the air that is sucked by the dust on the surface to be cleaned (see FIGS. 2 and 5). . As will be described later, when the cyclone separator 200 is attached to the cleaner body 100, the suction nozzle body 5, the suction pipe 4, the connection pipe 3, and the suction hose 2 are formed, according to the cleaner body 100, the cyclone separation device 200, and the cleaner body 100. The sequence is connected to attract dusty air, and after separating the dust and clean air, the clean air is discharged to the air path outside the vacuum cleaner body.

At the front portion of the cleaner body 100, a hose connection port 103 connected to the hose end portion 21 of the suction hose 2 is formed.

In addition, a cyclone separating device accommodating portion 110 that is formed in a substantially concave shape and that accommodates the cyclone separator 200 obliquely toward the front and lower sides is formed on the upper surface of the cleaner body 100, and a cyclone separating device is formed substantially at the center of the bottom surface of the cyclone separating device accommodating portion 110. The handle accommodating portion 111 of the handle portion 201 (see Fig. 5).

The cyclone separation device connection port 104 is formed on the right side of the rear portion of the cleaner body 100, and the cyclone separator 200 is connected to an inflow port 212 (described later) through which the dust-containing air flows. Further, an intake pipe 105 that connects the hose connection port 103 and the cyclone separating device connection port 104 is formed inside the right side of the cyclone separating device housing portion 110 (indicated by a broken line in FIG. 5).

The cleaner body connecting port 106 is formed at a substantially center on the left and right of the rear portion of the cleaner body 100 so as to be adjacent to the cyclone separating port 104, and the clean air from which the dust has been separated flows out from the cyclone separating device 200. The outlet 244 (described later) is connected. The cleaner body connecting port 106 communicates with an exhaust port (not shown) that discharges clean air to the outside of the cleaner body 100 via the electric blower 102, and the cleaner body connecting port 106, the electric blower 102, and the exhaust port form an exhaust air path. (not shown).

A cleaner body handle 109 that is erected from above on both sides is provided in the cleaner body 100. Further, at the rear portion, the power cord reel that houses the power cord 101 is stored. Further, one of the pair of rotating shafts 107 is disposed on the bottom surface of the rear portion. Further, the caster 108 freely rotating the shaft is disposed on the front bottom surface.

(Cyclone separation device)

As shown in FIGS. 6 to 8, the cyclone separation device 200 is formed into a substantially cylindrical shape as a whole, and has a substantially cylindrical rotating portion box 210 and a dust collecting box surrounding the rotating portion box 210. 230 and a discharge unit case 240 connected to the upper portion of the rotating unit case 210.

In the rotating unit case 210, as shown later, the inflow port 212, the whirling chamber 218, the side wall opening portion 213, and the rib 220, which are referred to in the scope of the patent application, are formed.

The dust collecting box 230 is formed as a side wall outer dust collecting chamber 235 as referred to in the scope of the patent application as will be described later.

In the discharge unit case 240, as will be described later, the discharge port 244 is referred to in the scope of the patent application.

The rotating unit case 210 is open at the upper end, and has a substantially cylindrical upper cylindrical portion 211 at the upper portion, a conical portion 215 formed to be connected to the lower end of the upper cylindrical portion 211, and an outer side surrounding the conical portion 215. Lower cylindrical portion 214.

In the upper portion of the side wall 211a of the upper cylindrical portion 211, the formation is from It is an inflow port 212 of dusty air of the suction duct 105 of the external air passage. The side wall opening portion 213 is formed at a lower portion of the side wall 211a of the upper cylindrical portion 211. A rib 220 to be described later is formed in the side wall opening portion 213. Further, a lower cylindrical portion 214 is formed which is connected to the upper cylindrical portion 211, has a cylindrical shape on the outer side of the conical portion 215, and has a lower end opening portion 214a at the lower end portion. Further, on the outer circumference of the upper cylindrical portion 211, a flange portion 211b that plugs the upper end portion 233 of the dust collecting portion box 230 to be described later is formed.

The opening portion 215a is formed at the lower end of the conical portion 215 and is located above the lower end opening portion 214a of the lower cylindrical portion 214.

Inside the upper cylindrical portion 211 and the conical portion 215, a whirling chamber 218 is formed which rotates the dust-containing air flowing in from the inflow port 212 to separate the air from the dust.

Further, a conical outer dust collecting chamber 219 is formed by a space surrounded by the lower cylindrical portion 214, the bottom portion 232 of the dust collecting portion box 230 to be described later, and the outer side of the conical portion 215.

As will be described later, the discharge unit case 240 is connected to the upper end of the rotary unit case 210.

The dust collecting box 230 is a substantially cylindrical outer wall 231 and has a bottomed bottom case, and the upper end portion 233 is open. The upper end portion 233 is covered by a flange portion 211b formed on the outer circumference of the cylindrical portion 211 above the rotating portion tank 210. The bottom portion 232 is provided with a cylindrical partition wall portion 232a so as to be fitted to the inner peripheral wall of the lower end opening portion 214a of the lower cylindrical portion 214 of the rotary unit case 210. Further, a sealing member 234 such as a gasket is provided between the lower end edge of the lower end opening portion 214a and the bottom portion 232.

Also formed on the inner side of the outer wall 231 and below the rotating portion box 210 The space between the outer portions of the cylindrical portion 214 forms a side wall outer dust collecting chamber 235, and the dust having a relatively heavy weight passing through the side wall opening portion 213 among the dusty air rotating in the rotating chamber 218 is accumulated in the side wall outer dust collecting chamber 235. The lower part.

Further, in the outer wall 231, a cyclone separating device handle portion 201 is formed, and the rotating portion box 210 is used to convey the dust separating device 200 when the dust accumulated at the bottom of the dust collecting portion box 230 of the cyclone separating device 200 is discarded. Cyclone separation device handle portion 201.

The dust collecting box 230 is formed of a resin having high transparency so that the user can confirm the accumulation of dust. At this time, the user may feel uncomfortable because of the visibility of the dust. As an improvement, the dust collecting box 230 can be formed of a transparent resin, and a plating layer deposited by a half mirror can be formed on the outer side.

The discharge unit case 240 is composed of a discharge pipe 241 and a lid portion 242.

The discharge pipe 241 is composed of a cylindrical portion 241a coaxial with the central axis of the upper cylindrical portion 211 of the rotating portion tank 210 and a conical portion 241b connected to the lower portion of the cylindrical portion 241a, and is located below the cylindrical portion 241a. A plurality of fine holes 241c are drilled in the conical surface of the conical portion 241b.

The inside of the lid portion 242 is open to communicate with the upper end of the discharge pipe 241, and a discharge pipe 243 is formed in a direction in which the center axis of the discharge pipe 241 is bent. The other end of the inside of the cover portion 242, that is, the discharge end of the discharge pipe 243, forms a discharge port 244. The discharge port 244 is connected to the cleaner body connection port 106 of the cleaner body 100.

(ribs placed on the side opening)

The main portion of the present invention is formed in the side wall opening portion 213 The structure of the ribs 220.

As shown in Fig. 9, the side wall opening portion 213 is formed in a sector shape of substantially 1/4 circle, and the size of the upper cylindrical portion 211 in the tube axis direction is 45 mm, and the dimension in the circumferential direction is 30 mm. Further, the inner diameter of the upper cylindrical portion 211 is 80 mm. Further, the thickness of the upper cylindrical portion 211 is 1.8 mm.

As shown in FIGS. 9 and 10, the ribs 220 suppress wind noise of the airflow passing through the side wall opening portion 213. The material including the cylindrical portion 211 at the upper portion of the rib 220 is an ABS resin, but a thermoplastic resin such as a polypropylene resin may be used. The rib 220 is extended from the upstream side of the swirling airflow in the whirling chamber 218 in the tangential direction of the swirling airflow along the side wall 211a (the height in the tangential direction is 6 mm), and the tip end portion 221 becomes the free end. Here, the inner surface of the side wall 211a and the inner surface of the rib 220 are smoothly connected so that the center of curvature thereof is the same as the rotation axis of the upper cylindrical portion 211. The outer surface of the rib 220 is recessed toward the outer side of the upper cylindrical portion 211 than the outer surface of the side wall 211a. The thickness of the rib 220 is preferably 1 mm or less. In this manner, since the thickness of the rib 220 is made thin, the elasticity of the rib 220 becomes high, and the free end of the tip is easily elastically deformed.

Further, as shown in FIG. 9, the notch portion 222 may be provided at the upper end and the lower end of the rib 220. By providing the notch portions 222 at the upper and lower ends of the ribs 220 (each having a width of about 1 mm), the elasticity of the ribs 220 becomes higher, and the free ends of the tips are more elastically deformed.

As will be described later, by this elastic deformation, the regular vortex generated by the airflow passing through the side wall opening portion 213 is disturbed, and the noise level at a specific frequency can be lowered.

Next, the overall operation of the electric vacuum cleaner will be described.

When the power cord 101 built in the cleaner body 100 is connected to the socket, and the operation switch 32 is operated to drive the electric blower 102, the electric blower 102 generates suction air, and the dust-containing air including the dust on the surface to be cleaned passes through the suction port body 5, The suction pipe 4, the connection pipe 3, and the suction hose 2 are sucked into the cleaner body 100 from the hose connection port 103. Then, the dust-containing air is sucked into the cyclone separator 200 from the hose connection port 103 via the intake pipe 105 and from the cyclone separator connection port 104 via the inflow port 212.

The operation in the cyclone separation device 200 will be described later.

The clean air from which the dust has been separated in the cyclone separation device 200 is sucked into the cleaner body 100 from the cleaner body connection port 106 via the discharge port 244 of the cyclone separation device 200. The clean air sucked into the cleaner body 100 is discharged from the exhaust port to the outside of the cleaner body 100 via the electric blower 102.

Next, the operation in the cyclone separation apparatus 200 will be described.

The dust-laden air sucked in from the inflow port 212 is introduced into the whirling chamber 218, and forms a swirling airflow that rotates along the side wall 211a of the upper cylindrical portion 211 of the rotating portion tank 210 (refer to the arrow of the solid line in Fig. 10). ). This swirling airflow is formed in a free vortex region in which a forced vortex region having a large flow velocity near the central axis of the upper cylindrical portion 211 is formed, and a free vortex region having a small flow velocity on the outer side thereof gradually flows downward (the side of the conical portion 215).

The centrifugal force acts on the dust contained in the swirling airflow in the rotating chamber 218. For example, dust having a relatively large volume of fiber dust or hair (hereinafter referred to as "dust α") is pressed against the side wall 211a of the upper cylindrical portion 211 by the centrifugal force, and falls in the rotating chamber 218. . Dust α reaches the side wall The height of the mouth portion 213 is separated from the swirling airflow, passes through the side wall opening portion 213, and is sent to the side wall outer dust collecting chamber 235. The dust α entering the side wall outer dust collecting chamber 235 from the side wall opening portion 213 moves in the same direction as the rotation direction of the air current rotating in the rotating chamber 218, and falls into the side wall outer dust collecting chamber 235 to reach the side wall outer set. The lowermost portion of the dust chamber 235 is collected.

On the other hand, the dust that has not entered the side wall outer dust collecting chamber 235 from the side wall opening portion 213 is the airflow that rides on the whirling chamber 218, and is rotated downward in the rotating chamber 218 to face downward. A relatively small amount of dust (hereinafter referred to as "dust β") of sand dust or fine fiber dust is passed through the opening portion 215a, and then dropped to the outer portion of the cone portion 219 to be collected.

When the airflow rotating in the whirling chamber 218 reaches the lowermost portion of the whirling chamber 218, that is, the lower end of the conical portion 215, the advancing direction is changed upward, and rises along the central axis of the whirling chamber 218. Dust α and dust β are removed from the air forming the updraft. The airflow (clean air) from which the dust α and the dust β have been removed passes through the discharge pipe 241 and the discharge pipe 243, and is discharged from the discharge port 244 to the outside of the cyclone separator 200.

Next, the operation of the rib 220 of the airflow passing through the side wall opening portion 213 will be described. FIGS. 12 and 13 show an example of actual measured values of the frequency components of the noise level in the case where the side wall opening portion 213 has no rib 220. FIGS. 14 and 15 show an example of actual measured values of the frequency components of the noise level in the case where the ribs 220 are provided in the side wall opening portion 213. In either of the figures, the horizontal axis is the frequency and represents the range from 100 Hz to 10000 Hz. The vertical axis is the noise level (dB).

The measurement condition is that the power consumption of the electric blower 102 is 850W. Figure 12 is the bottom left and right center of the floor before passing through the cleaner body 100. The position of 1.5 m upward and the figure 13 are measured at a position 1.5 m to the left from the center left and right before passing through the cleaner body 100.

The average value of the noise level measured by the power meter is 65.5 dB in the case of Fig. 12 and 65.2 dB in the case of Fig. 13. Further, the case of Fig. 14 is 65.2 dB, and the case of Fig. 15 is 62.7 dB. In this way, it is known that by arranging the ribs 220, the average value of the noise level is lowered, and in particular, the average value of the noise level from the left and right center of the cleaner body 100 to the left position is significantly lowered.

Also, as a specific frequency, the noise level at 1000 Hz (the portion surrounded by an ellipse in the figure) is compared. The reason why the 1000 Hz is selected is that the side wall opening portion 213 is not formed in the side wall 211a of the upper cylindrical portion 211, the peak of noise does not occur at 1000 Hz, and the noise at a frequency of 1000 Hz is felt to be harsh, and the purpose is to reduce the noise at 1000 Hz. Level.

It is known that the noise level at 1000 Hz is reduced in Figures 14 and 15 relative to the noise level at 1000 Hz in Figures 12 and 13.

The function of the rib 220 will be described.

When the swirling airflow flows from the side wall opening portion 213 formed in the side wall 211a of the upper cylindrical portion 211 to the side wall outer dust collecting chamber 235, the upstream side of the swirling airflow from the side wall opening portion 213 is tangent according to the same principle as the flute sounding. Since the velocity of the airflow flowing in the direction is fixed, the Karman vortex in which the rotational direction is alternately changed is generated from the edge portion on the downstream side of the swirling airflow of the side wall opening portion 213, and the density of the air changes periodically. Therefore, wind noise having a large peak value at a specific frequency component is generated.

The rib 220 is disposed above the swirling airflow of the side wall opening portion 213 At the edge portion of the side, since the tip end portion 221 of the rib 220 becomes a free end, the free end slightly vibrates by the swirling air current. Since the thickness of the rib 220 is 1 mm or less, the elasticity is high. Therefore, the constant-speed airflow flowing in the tangential direction from the upstream side is disturbed by the ribs 220 and becomes irregular, and the wind noise does not have a peak at a specific frequency component.

Further, when the notch portion 222 is provided at the upper end and the lower end of the rib 220, the elasticity of the rib 220 becomes higher, and the free end of the tip is more elastically deformed. Therefore, the wind noise reduction effect at a specific frequency is higher.

Further, since the rib 220 is extended from the upstream side of the swirling airflow in the upper cylindrical portion 211 of the whirling chamber 218 in the tangential direction along the side wall 211a and the tip end portion 221 is formed as a free end, hair, dust, and the like are suppressed. It is stuck, and it also suppresses the noise caused by pressure loss.

According to the cyclone separating apparatus according to the first embodiment, the inflow port includes the inflow of dust-containing air from the external air passage, and the whirling chamber is formed in a substantially cylindrical shape so as to flow in from the inflow port. The dust air rotates to separate the air and the dust; the dust collecting chamber on the side wall stores the dust separated from the dust-containing air through the opening of the side wall of the side wall of the cylindrical portion of the rotating chamber; and the discharge port is discharged The air separated from the dusty air in the rotating chamber; since the rib that suppresses the wind noise of the airflow passing through the opening of the side wall is provided in the side wall opening portion, the free end of the rib is slightly vibrated by the swirling air flow, and is tangential from the upstream side The constant flow of the flow is disturbed by the ribs and becomes irregular, and the wind noise does not have a peak at a specific frequency component. Therefore, the wind noise of the airflow passing through the side wall opening portion can be suppressed, and a cyclone separating device having a small noise and an electric vacuum cleaner using the cyclone separating device can be obtained.

Further, since the notch portion is provided at the upper end and the lower end of the rib, the elasticity of the rib becomes higher, and the free end of the tip is more elastically deformed. Therefore, the wind noise reduction effect at a specific frequency is higher.

Further, since the rib is extended from the upstream side of the swirling airflow of the upper cylindrical portion of the whirling chamber in the tangential direction of the side wall of the whirling chamber, and the tip end thereof is formed as a free end, it is possible to suppress the seizure of hair or dust, and the like. It also suppresses the noise caused by pressure loss.

Second embodiment

Fig. 11 is a view showing a configuration of a rib provided in a side wall opening portion of a main portion of a cyclone separating apparatus according to a second embodiment of the present invention (a state in which the dust collecting portion box 230 has been removed). Fig. 16 is a view for explaining the effects of the cyclone separation device shown in the second embodiment of the present invention. Fig. 17 is a view for explaining the effects of the cyclone separation device shown in the second embodiment of the present invention. In either of the figures, the horizontal axis is the frequency and represents the range from 100 Hz to 10000 Hz. The vertical axis is the noise level (dB).

The second embodiment is different in shape from the rib 220 provided in the side wall opening portion 213 of the first embodiment, and the other configuration is the same as that described in the first embodiment.

As shown in Fig. 11, the rib 223 provided in the side wall opening portion 213 has a zigzag shape in which the peak portion 223a and the valley portion 223b are alternately formed. The height from the bottom of the valley portion 223b to the tip end of the peak portion 223a is about 6 mm to 9 mm. In addition, this zigzag shape is called the Yamagata symbol in heraldic. As shown in Fig. 11, the rib 223 is formed by five peak portions 223a and six valley portions 223b. The valley portion at the upper end and the lower end of the rib 223 also has the notch portion 222 of the first embodiment.

Next, the operation of the rib 223 of the airflow passing through the side wall opening portion 213 will be described. FIGS. 16 and 17 show an example of actual measured values of the frequency components of the noise level in the case where the rib 223 is provided in the side wall opening portion 213. The measurement conditions are the same as those described in the first embodiment, and the power consumption of the electric blower 102 is 850 W. Fig. 16 is a view taken at a position 1.5 m above the floor surface of the right and left center before passing through the cleaner body 100, and Fig. 17 is a result measured at a position 1.5 m leftward from the left and right center before passing through the cleaner body 100. Here, it is also compared with the 12th and 13th views of the example of the measured value of the frequency component of the noise level in the case where the side wall opening part 213 has no rib 220.

As in the first embodiment, the average value of the noise level measured by the power meter is 65.5 dB in the case of the twelfth view of the side wall opening portion 213 without the rib 223, and is 65.2 dB in the case of Fig. 13. Further, the case of Fig. 16 is 64.4 dB, and the case of Fig. 17 is 61.2 dB. In this way, it is known that by arranging the ribs 223, the average value of the noise level is lowered, and in particular, the average value of the noise level from the front left and right center of the cleaner body 100 to the left position is significantly lowered.

Further, as in the first embodiment, the noise level at 1000 Hz (the portion surrounded by an ellipse in the figure) is compared as a specific frequency.

It is known that the noise level at 1000 Hz is reduced in Figures 16 and 17 relative to the noise level at 1000 Hz in Figures 12 and 13.

The action of the rib 223 will be described.

As described in the first embodiment, when the swirling airflow flows into the side wall outer dust collecting chamber 235 from the side wall opening portion 213 formed in the side wall 211a of the upper cylindrical portion 211, the swirling airflow from the side wall opening portion 213 is upstream. The velocity of the airflow flowing in the tangential direction of the side is fixed, so that the side opening portion 213 is The edge portion on the downstream side of the swirling airflow generates a Karman vortex in which the rotational direction is alternately changed, and the density of the air changes periodically. Therefore, wind noise having a large peak value at a specific frequency component is generated.

When the rib 223 having the zigzag shape of the peak portion 223a and the valley portion 223b is alternately provided at the end portion on the upstream side of the swirling airflow of the side wall opening portion 213, since the tip end portion (the peak portion 223a) of the rib 223 becomes the free end, The free end vibrates slightly by the swirling airflow. Further, by providing the notch portions 222 (each having a width of about 1 mm) at the upper end and the lower end of the rib 223, the elasticity of the rib 223 becomes higher, and the free end of the tip is more elastically deformed.

Further, when the swirling airflow passes through the rib 223, since the swirling airflow having the fast flow velocity in the whirling chamber 218 and the swirling airflow having the slow flow velocity in the side wall outer collecting chamber 235 are not mixed at once, respectively, at the connecting peaks Since the airflow on the line between the 223a and the valley portion 223b is gradually mixed, the development of the vortex which is a cause of noise is suppressed. As a result, noise can be further reduced.

Further, since the notch portion 222 is provided at the upper end and the lower end of the rib 223, the elasticity of the rib 223 becomes higher, and the free end of the tip is more elastically deformed. Therefore, the wind noise reduction effect at a specific frequency is higher.

Further, since the rib 223 is extended from the upstream side of the swirling airflow in the upper cylindrical portion 211 of the whirling chamber 218 in the tangential direction of the side wall 211a and the tip end portion (peak portion 223a) is formed as a free end, the hair or cotton is suppressed. The dust or the like is stuck, and the noise caused by the pressure loss is also suppressed.

In the second embodiment, the thickness of the rib 223 is set to be 1 mm or less as in the first embodiment, but it may be 1.8 mm which is the same thickness as the upper cylindrical portion 211. Although the rigidity at the tip end portion of the rib 223 is increased and vibrating It is reduced, but since the airflow is gradually mixed on the line connecting the peak portion 223a and the valley portion 223b, it has an effect of suppressing the development of the vortex which is a cause of noise.

According to the cyclone separating apparatus of the second embodiment, the inflow port includes the inflow of dust-containing air from the external air passage, and the whirling chamber is formed in a substantially cylindrical shape so as to flow in from the inflow port. The dust air rotates to separate the air and the dust; the dust collecting chamber on the side wall stores the dust separated from the dust-containing air through the opening of the side wall of the side wall of the cylindrical portion of the rotating chamber; and the discharge port is discharged The air separated from the dust-containing air in the rotating chamber; the rib that suppresses the wind noise of the airflow passing through the opening of the side wall is provided in the side wall opening portion, and the rib is alternately formed with the zigzag shape of the peak portion and the valley portion, so The swirling airflow, the free end of the rib slightly vibrates, and the constant-speed airflow flowing in the tangential direction from the upstream side is not only an effect of being disturbed when passing through the rib, but also on the line connecting the peak and the valley Since the airflow is gradually mixed, there is an effect of suppressing the development of the vortex which is a cause of noise. As a result, wind noise does not have a peak at a particular frequency component. Therefore, the wind noise of the airflow passing through the side wall opening portion can be suppressed, and a cyclone separating device having a small noise and an electric vacuum cleaner using the cyclone separating device can be obtained.

Further, since the notch portion is provided at the upper end and the lower end of the rib, the elasticity of the rib becomes higher, and the free end of the tip is more elastically deformed. Therefore, the wind noise reduction effect at a specific frequency is higher.

Further, since the rib is extended from the upstream side of the swirling airflow of the upper cylindrical portion of the whirling chamber in the tangential direction of the side wall of the whirling chamber, and the tip end thereof is formed as a free end, it is possible to suppress the seizure of hair or dust, and the like. Also suppress pressure loss The noise caused by the loss.

211‧‧‧ upper cylindrical part

211b‧‧‧Flange

213‧‧‧ Side wall opening

214‧‧‧ lower cylindrical part

214a‧‧‧Bottom opening

220‧‧‧ rib

221‧‧‧ tip

222‧‧‧ nicks

240‧‧‧Export box

242‧‧‧ Cover

Claims (6)

A cyclone separating device comprising: an inflow port into which dusty air from an external air path flows; and a whirling chamber formed in a substantially cylindrical shape to rotate the dusty air flowing in from the inflow port to separate air and Dust; the dust collecting chamber on the side wall stores dust separated from the dust-containing air through a side wall opening opened in a side wall of the cylindrical portion of the rotating chamber; and the discharge port is discharged from the rotating chamber The air separated by the dust air is characterized in that a rib that suppresses wind noise of the airflow passing through the opening of the side wall is provided in the side wall opening. The cyclone separating apparatus according to claim 1, wherein the rib is extended from a upstream side of the swirling airflow in the rotating chamber in a tangential direction of the side wall of the cylindrical portion, and a tip end thereof is formed as a free end. The cyclonic separating apparatus of claim 2, wherein the ribs are formed to alternately have a zigzag shape of a peak and a valley. The cyclone separation device according to any one of claims 1 to 3, wherein the notch portion is formed at an upper end and a lower end of the rib. The cyclone separation device according to any one of claims 1 to 3, wherein the rib has a thickness of 1 mm or less. An electric vacuum cleaner comprising: a cleaner body, an electric blower built in to generate a suction wind; and a cyclone separation device, as in any one of claims 1 to 3.