CN1989891B - Vacuum cleaner - Google Patents

Abstract

An electric vacuum cleaner that realizes a small and easy-to-operate cyclone-type dust collecting unit. The vacuum cleaner is equipped with: a cyclone separation cylinder that separates dust from the dust-laden air and is axially oriented to the vertical direction, an inlet portion that is arranged at the bottom of the cyclone separation cylinder to allow the dust-laden air to flow in, and is placed on the side of the cyclone separation cylinder. The dust collection box of the cyclone separation cylinder is provided with a communication port reaching the dust collection box on the upper part of the cyclone separation cylinder. The separation cylinder rotates inside, and a guide plate is provided inside the cyclone separation cylinder to allow the swirling flow of the dust-laden air flowing in from the inlet to flow from bottom to top.

Description

electric vacuum cleaner

This application is a divisional application of the invention patent application whose applicant is "Hitachi Household Electric Appliance Company", the application date is "January 29, 2004", the application number is "200410002414.4", and the invention name is "Electric Vacuum Cleaner".

technical field

The invention relates to an electric vacuum cleaner.

Background technique

A general electric vacuum cleaner introduces the dust-laden air sucked by the suction port into the vacuum cleaner body, removes dust through the dust collecting part in the vacuum cleaner body, and then discharges the clean air after dust removal to the outside of the vacuum cleaner body. The dust collection part is generally filtered by filter paper to capture dust for dust removal, or through centrifugal separation of cyclone separation cylinder to capture dust for dust removal.

An electric vacuum cleaner equipped with a cyclone type dust collecting unit is described in Patent Document 1. The dust collecting part of this vacuum cleaner is constructed to capture and remove dust by centrifugal separation of one cyclone separation cylinder.

In addition, as a cyclone-separation type dust collecting unit in an electric vacuum cleaner, the dust separation device described in Patent Document 2 proposes a double structure of a cyclone separation cylinder having an outer separation cylinder and an inner separation cylinder, and the outer separation cylinder is used to centrifugally separate coarse particles. Dust is dedusted, and the inner separation drum is used to centrifugally separate the fine dust for dedusting.

For electric vacuum cleaners used in general households, miniaturization and ease of operation are very important. Therefore, it is necessary to reduce the size of the dust collection unit and simplify the operation of discarding the captured dust.

The dust collection section that captures dust with a single cyclone collects both coarse dust and fine dust, so when the captured dust is discarded, the fine dust is likely to scatter, making the dust disposal operation very troublesome. In addition, in order to improve the performance of capturing dust (dust collection=dust removal), the cyclone separation cylinder is lengthened and the size of the equipment is increased.

The cyclone-type dust separator (dust collection unit) with double inner and outer separation cylinders is difficult to be compact and easy to operate because it has an integrated structure of the outer separation cylinder and the inner separation cylinder. In general household use, the operation frequency of capturing a large amount of coarse dust and discarding the coarse dust is very high, but the dust collection part with the structure of the inner and outer double separation cylinders cannot remove only the outer separation cylinder that has captured the coarse dust , only scrapping these coarse dust operations.

[Patent Document 1]

Japanese Patent Laid-Open No. 2001-29288

[Patent Document 2]

Japanese Patent Application Publication No. 10-511880

Contents of the invention

One object of the present invention is to propose an electric vacuum cleaner equipped with a small and easy-to-operate cyclone-type dust collecting unit.

Another object of the present invention is to propose an electric vacuum cleaner including a small cyclone-type dust collecting unit having high dust capturing (dust collecting) performance.

Still another object of the present invention is to propose an electric vacuum cleaner provided with a cyclone-type dust collecting unit capable of ensuring that the captured fine dust does not scatter.

The present invention relates to an electric vacuum cleaner, equipped with: a cyclone separating cylinder that separates dust from dust-laden air and that is axially oriented in a vertical direction; The dust collection box on the side of the cyclone separation cylinder is provided with a communication port reaching the dust collection box on the upper part of the cyclone separation cylinder, and it is characterized in that, from the entrance of the cyclone separation cylinder, The dust-laden air in the cylinder rotates in the cyclone separation cylinder. Inside the cyclone separation cylinder, a guide plate is provided to make the swirling flow of the dust-laden air flowing in from the inlet part flow from bottom to top. The lower part of the cyclone separation cylinder is provided with an inner cylinder, and the inner cylinder has a filter screen on the side of the cylinder part, and the exhaust gas from the cyclone separation cylinder flows in through the filter screen, and the guide plate is formed by a partition wall. The partition wall is wound helically around the cylindrical portion of the inner cylinder.

In addition, in the above-mentioned first technical means, the spiral partition wall is provided on the upper side of the communication port reaching the inlet of the cyclone separation cylinder.

Furthermore, in the first technical means described above, the separation chamber is formed in a cylindrical shape, and the inlet portion is provided so that air flows in a tangential direction of the separation chamber.

Furthermore, in the first technical means described above, the inlet portion is arranged at a lower position in the middle of the length of the separation chamber in the direction of the central axis.

In the present invention, a cyclone separation cylinder generating upward swirling airflow and a dust collection box with a filter inside the side are arranged, and installed on the vacuum cleaner body to realize a small and easy-to-operate cyclone-type dust collection part.

Since the partition wall of the inner cylinder rises upwards in a spiral shape, even a vacuum cleaner with a low air volume operation, the dust will be strongly lifted up in the cyclone separation cylinder, so that the dust can be transported to the dust box.

Furthermore, it is possible to reduce losses due to disturbance, mixing, and the like of the air flow flowing from the inlet pipe into the cyclone separation drum.

Description of drawings

Fig. 1 shows a perspective view of the appearance of an electric vacuum cleaner according to an embodiment of the present invention

Fig. 2 The perspective view of the vacuum cleaner body of the electric vacuum cleaner shown in Fig. 1

Fig. 3 shows the perspective view of the upper cover of the vacuum cleaner body of the vacuum cleaner shown in Fig. 1 in an open state

Fig. 4 shows the perspective view of the state of opening the dust collector body of the vacuum cleaner shown in Fig. 1 and removing the dust box

Fig. 5 shows the perspective view of the state of opening the dust collector body of the vacuum cleaner shown in Fig. 1 and removing the dust box and the cyclone separation cylinder

Figure 6 shows a top view of the state where the upper case and upper cover of the vacuum cleaner body are removed

Figure 7 shows a schematic diagram of air flow

The appearance perspective view of the cyclone separation cylinder 104 of Fig. 8

The appearance perspective view of the dust box 105 of Fig. 9

Figure 10 shows a cross-sectional view of the A-A section of Figure 6

Fig. 11 is a sectional view including the inlet pipe part of the cyclone separation drum 104

Fig. 12 is a sectional view including the communication port 117 of the cyclone separation drum 104 and the dust collection box 105

Figure 13 is a side view of the dust box 105 viewed from the exhaust side

The perspective view of the inner cylinder 131 in Fig. 14

Fig. 15 The perspective view of the appearance when the cyclone separation cylinder 104 and the dust collection box 105 are integrated

Fig. 16 shows a perspective view of the appearance of an upright electric vacuum cleaner according to an embodiment of the present invention

The side view of the electric vacuum cleaner shown in Fig. 17 and Fig. 16

Fig. 18 is a longitudinal sectional view of the dust collection part 460 in which the cyclone separation cylinder 404 and the dust collection box 405 are integrated

FIG. 19 is a view of the dust collecting part 460 viewed from the back side of the vacuum cleaner body 301

Fig. 20 is a cross-sectional view taken along the line B-B of Fig. 19 .

Detailed ways

A first embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a perspective view showing the appearance of an electric vacuum cleaner according to an embodiment of the present invention. Fig. 2 is a perspective view of the vacuum cleaner body. Fig. 3 is a perspective view showing a state in which an upper cover of the vacuum cleaner body is opened. Fig. 4 is a perspective view showing a state in which the dust box of the vacuum cleaner main body is removed. Fig. 5 is a perspective view of a state where the dust box and the cyclone separator of the main body of the vacuum cleaner are removed. Fig. 6 is a horizontal top view with the upper cover and the upper case removed. Fig. 7 is a schematic view showing the air flow in the main body of the vacuum cleaner.

The electric vacuum cleaner in this embodiment, as shown in FIG. 1 , includes a vacuum cleaner body 1 , a hose 2 , a manual operation tube 3 , a telescopic connecting tube 4 and a suction port 5 . The vacuum cleaner body 1 is connected with the manual operation pipe 3 with a hose 2, and the suction port 5 is connected with the manual operation pipe 3 through a telescopic connection pipe 4 for use.

The vacuum cleaner body 1 has a built-in electric blower (described later), whereby the suction of the electric blower is sucked from the suction port 5, and the dust is sucked in by the generated suction flow, and the dust is sucked by the telescopic connecting pipe 4, the manual operation pipe 3 and the hose 2. The inhaled dust-laden air is sucked into the vacuum cleaner body 1, and is discharged out of the machine after being dedusted (dust-collected) by a cyclone-type dust-collecting part (described later).

As shown in Figures 2 to 6, the vacuum cleaner body 1 installs the cyclone separation cylinder 104 and the dust collection box 105 between the lower case 101 and the upper cover 102, which can be loaded and disassembled, and a second auxiliary device is built between the lower case 101 and the upper case 150. filter 112 and electric blower 107 and cord reel 110 .

The vacuum cleaner body 1 flows the dusty air from the inlet pipe 115 into the cyclone separation cylinder 104 through the hose 2 as shown in Figure 7 and makes it rotate, and the dust is separated under the action of centrifugal separation, and the dust passes through the upper communication port. 117 is transported to the dust collecting box 105, and the exhaust gas from the cyclone separation cylinder 104 is discharged to the exhaust port 120 provided at the bottom of the cyclone separation cylinder 104 through the inner cylinder 131. In addition, a part of the air flows into the dust box 105 and dust is captured by the first auxiliary filter 106 . The exhaust gas from the dust box 105 is sucked by the electric blower 107 through the second auxiliary filter 112 through the cyclone outlet 146 behind the first auxiliary filter 106 . At this time, the exhaust gas from the cyclone separation cylinder 104 also passes through the connecting passage 145 from the exhaust port 120 , flows out from the outlet 146 of the cyclone part, and is sucked by the electric blower 107 together with the exhaust gas from the dust box 105 . The exhaust gas from the electric blower 107 passes through the filter 108, partly passes through the exhaust flow path (not shown), and partly flows into the electric wire reel 110 to cool them, and then is discharged outside the machine.

The lower case 101 is equipped with moving wheels 208 and guide wheels (not shown) that make the vacuum cleaner body 1 move on the ground. The cyclone separation cylinder 104 and the dust collection box 105 are vertically installed side by side, which can be independently loaded and unloaded. Second auxiliary filter 102.

The upper cover 102 is installed on the upper rear part of the upper case 150 and can be rotated. In the closed state, the inlet pipe 115 of the cyclone separation cylinder 104 and the hose connection port 116 are in contact with each other in an airtight state to separate the cyclone. The communication port 117 of the cylinder 104 abuts against the upper opening 118 of the dust collection box 105 in an airtight state, and enables the exhaust port 120 at the bottom of the cyclone separation cylinder 104 to connect with the connection passage 145 provided at the bottom of the dust collection box 105 in an airtight manner. The airtight contact between the outlet port 146 of the cyclone part and the filter box 113 that accommodates the second auxiliary filter 112 is made. The axial direction of the cyclone separation cylinder 104 is oriented in the vertical direction, but it does not matter if it is inclined in a direction other than the vertical direction.

Hold the handle 123 on the top of the dust collection box 105 to take out the dust collection box 105, and by opening the first auxiliary filter 106 in the dust collection box 105, the dust in the dust collection box 105 can be discarded.

And, when the inside of the cyclone separation drum 104 is dirty, the upper handle 125 can be grasped, lifted from the lower case 101, and the cyclone separation drum 104 can be disassembled for cleaning.

Here, the inner surface of the cyclone separation drum 104 and the inner surface of the dust collection box 105 are treated with a clean UV hardening type coating. Therefore, when the dust flows into the above-mentioned cyclone separation drum 104 and flows into the above-mentioned dust collection box 105 after being centrifuged, when the dust collides with the inner surface of the cyclone separation drum 104 and the inner surface of the dust collection box, and rubs , the surface is difficult to be damaged and dirt is not easy to adhere to, and at the same time, the wear resistance and pollution resistance are improved. Therefore, when the outer cylinder 135 and the dust box 105 of the cyclone separation cylinder 104 are made of a transparent plastic material, it is possible to visually confirm the accumulation of dust.

And, by forming the cyclone separation cylinder 104 and the dust collection box 105 with an antistatic tree indicator agent, or coating the surface with an antistatic agent, the dust is difficult to adhere to the above-mentioned cyclone separation cylinder 104 and the dust collection box 105, and the cleaning time can be reduced. frequency.

Next, the internal configuration of the vacuum cleaner body 1 will be described with reference to FIG. 6 . FIG. 6 is a top view with the upper case 150 and the upper cover 102 removed. The hose connection port 116 is located at the center in the width direction of the main body 1 when viewed from above, and is disposed on the front of the main body 1 . The central axis of the cyclone 104 is shifted from the center in the width direction, and the inlet pipe 115 and the hose connection port 116 through which air flows into the cyclone 104 in a direction substantially tangential to the cyclone 104 are arranged in a straight line. In addition, the dust collecting box 105 is provided on the side opposite to the center axis of the cyclone separation cylinder 104 in the width direction. Similarly, the electric blower 107 is provided on the side opposite to the central axis of the cyclone separation cylinder 104 in the width direction, and the second auxiliary filter 112 is provided on the front surface thereof. The electric wire reel 110 is installed beside the electric blower 107, and is installed in the same direction as the central axis of the cyclone separation drum 104 in the width direction.

Through such an arrangement, the length of the main body can be shortened, and the size and weight can be achieved. Furthermore, since the inlet portion of the cyclone separation cylinder 104 does not need to be curved or the like, an effect of reducing loss can be obtained.

Here, the direction in which the dust centrifuged by the cyclone separation cylinder 104 flows out from the cyclone separation cylinder 104 through the communication port 117 is the rotation direction inside the cyclone separation cylinder 104 and is the tangential direction of the cyclone separation cylinder 104 . Therefore, in this embodiment, both the communication port 117 of the cyclone separation drum 104 and the upper opening 118 of the dust box 105 communicating with the communication port 117 can be arranged at the first opening and closing distance from the opening and closing of the dust box 105. 1 The front side of the cleaner main body 1 (the hose connection port 116 side) where the auxiliary filter 106 is farthest. Here, the dust centrifugally separated by the cyclone separation drum 104 begins to accumulate from the vicinity of the open and close first auxiliary filter 106, and then flows to the communication port 117 of the cyclone separation drum 104 and the upper part of the dust collection box 105 communicated with the communication port 117. The side of the opening 118 is accumulated, so that the dust hardly clogs the communication port 117 and the upper opening 118 until the dust box 105 is filled with dust. That is, the volume of the above-mentioned dust box 105 can be effectively used.

The cyclone separation cylinder 104 and the dust collection box 105 will be described in detail below with reference to FIGS. 8 to 14 . Fig. 8 is a perspective view of the appearance of the cyclone separation drum 104, Fig. 9 is a perspective view of the appearance of the dust collection box 105, Fig. 10 is a cross-sectional view of A-A of Fig. 6, and Fig. 11 is a cross-sectional view including the inlet pipe part of the cyclone separation drum 104, 12 is a sectional view including the communication port 117 of the cyclone separation cylinder 104 and the dust collection box 105, FIG. 13 is a side view of the dust collection box 105 from the exhaust side, and FIG.

On the outer cylinder 135 of the cyclone separation cylinder 104, the central lower part of the central axis direction length of the cyclone separation cylinder 104 is provided with the inlet pipe 115 as the air inlet of the outer cylinder 135, so that the air flows along the substantially cylindrical cyclone separation cylinder The substantially tangential direction of 104 is set so that it enters. A communication port 117 is provided at the central upper part of the cyclone separating cylinder 104 to allow air and dust to flow into the dust collecting box 105 . The lower part of the cyclone separation drum 104 is provided with an inner drum 131 which is connected to the exhaust port 120 at the lower part. The inner tube 131 is composed of a tube portion 134 , a partition wall 132 wound helically around the tube portion 134 , and a guide wall 137 connecting the inlet pipe 115 and the tube portion 134 . A resin fiber mesh is molded integrally with the cylindrical portion 134 as the filter mesh 133 . As shown in FIG. 10, the filter 133 may be formed in the cylindrical portion on the side, or may constitute the upper plane of the cylindrical portion and the cylindrical portion on the side. Here, the filter screen 133 is not provided all around the cylindrical part of the side of the inner tube 131, and the filter screen 133 and the opening are not provided at about 90 degrees near the inlet pipe 115. Therefore, even if fine dust such as hair flows in from the inlet pipe 115 , it will not directly contact the filter 133 , effectively preventing the phenomenon of puncturing and entanglement. At the same time, when the pointed dust such as needles flows in from the inlet pipe 115, since there is no direct contact with the filter 133, the filter 133 is prevented from being broken and the dust is not flowed out.

In addition, since the filter 133 receives a force toward the inside of the inner cylinder 131, it is preferable to provide ribs 136 of the inner cylinder on the inner diameter side of the filter. Here, if antistatic treatment is performed on the filter 133, the dust adhering to the filter 133 is easily detached, and cleaning is facilitated.

And, since the outer cylinder 135 of the cyclone separation cylinder 104 is provided with the inlet pipe 115 as the air inlet of the outer cylinder 135 at the central lower part of the central axis direction length of the cyclone separation cylinder 104, the hose communicating with the above-mentioned inlet pipe 115 The connection port 116 may be arranged at the center lower part of the length of the cyclone separation cylinder 104 in the direction of the central axis. Therefore, since the above-mentioned hose connection port 116 can be arranged at the lower part of the vacuum cleaner body 1, when the above-mentioned vacuum cleaner body 1 is pulled back through the above-mentioned hose 2 using the manual operation pipe 3, the above-mentioned vacuum cleaner body 1 is difficult to fall over. , can be pulled back stably.

Since the above-mentioned hose connection port 116 can be arranged on the lower side of the above-mentioned vacuum cleaner body 1, it is not necessary to arrange the above-mentioned hose connection port 116 on the upper cover 102. When the cartridge 104 is separated, the upper cover 102 can be easily opened and closed even in the state where the hose 2 is attached.

Here, the partition wall 132 of the inner cylinder 131 is raised upward in a spiral form from a winding start position 138 in order to raise the air flow in the cyclone drum 104 upward. Therefore, the dust that flows into the cyclone separation cylinder 104 from the inlet pipe 115 is rotated in the above-mentioned cyclone separation cylinder 104 while rising along the spiral partition wall 132, is centrifugally separated, and is transported through the communication port 117 and the upper opening 118. In the dust box 105. In this way, since the above-mentioned partition wall 132 is raised upward in a spiral shape, the dust is subjected to a strong effect of rising in the above-mentioned cyclone separator 104. The working vacuum cleaner can also transport dust to the dust box 105 . Here, since the axial direction of the cyclone separation cylinder 104 is not horizontal, when the above-mentioned low air volume, the dust with a large specificity flowing into the above-mentioned cyclone separation cylinder 104 cannot rotate and falls during the rotation, thereby avoiding multiple collisions with the cyclone The separation cylinder 104 can effectively prevent damage and damage of the cyclone separation cylinder 104 .

The height H of the guide wall 137 is greater than the height L of the inlet pipe 115 . Therefore, it is difficult for the air flow flowing in from the inlet pipe 115 to interfere and mix with the air flow rotating in the cyclone separation cylinder 104, and it is possible to prevent the confusion caused by this, avoid rapid expansion during inflow, and reduce losses. Moreover, if the cross-sectional shape of the inlet pipe 115 adopts a substantially rectangular shape with four corners removed, when the air flow flows into the cyclone separation cylinder 104 from the inlet pipe 115, since the wall of the outer cylinder 135 and the partition wall 132 of the inner cylinder 131 can Therefore, compared with the case of the inlet pipe 115 having a circular cross section, the flow loss caused by the rapid expansion when flowing into the cyclone separation drum 104 can be reduced.

As described above, when the cross-sectional shape of the inlet pipe 115 is substantially rectangular, the cross-sectional shape of the connecting portion 2a of the hose 2 is gradually changed from the circular shape on the hose side to the substantially rectangular cross-sectional shape of the inlet pipe 115. The rectangular shape suppresses the loss caused by flow separation and the like, and allows the air flow to flow into the cyclone separation cylinder 104 .

The cyclone separation cylinder 104 is separable from each component forming the outer cylinder 135, the inner cylinder 131, and the exhaust port 120, and can be detachably embedded respectively, and each component is in contact with each other in an airtight state. In order to realize airtight contact, it is preferable to provide an elastic sealing member between the abutting parts. The cleaning of the cyclone separation cylinder 104 can be carried out by removing the respective components forming the outer cylinder 135 , the inner cylinder 131 and the exhaust port 120 .

The dust collecting box 105 is provided with an upper opening 118 at a position facing the communication port 117 of the cyclone separation cylinder 104, and both are in contact in an airtight state. The first auxiliary filter 106 attached to the filter frame 140 is provided on the exhaust side of the dust box 105 . Both sides of the filter frame 140 are open, and rotate around the shaft provided at the lower part. When the filter frame 140 is closed, the main box 141 of the dust box 105 and the filter frame 140 are in contact with each other in an airtight state. .

When cleaning up the rubbish, hold the handle 123 on the top of the dust box 105, lift the dust box 105, and press down the lever 142 that is integrated with the clamp part that clamps the filter frame 140, and then open the filter frame 140 to proceed. . The cleaning of the first auxiliary filter 106 can be performed by taking out the first auxiliary filter 106 from the filter frame 140 .

The first auxiliary filter 106 is preferably made of a sponge made of urethane with a foamable and cleanable material, or a cleanable non-woven fabric, or cleanable filter paper.

If antistatic treatment is performed on the first auxiliary filter 106 and the second auxiliary filter 112, the dust adhering to the first auxiliary filter 106 and the second auxiliary filter 112 can be easily peeled off and cleaned easily.

The lower part of the dust box 105 is integrally provided with a connection path 145 and a cyclone separation part outlet 146 . Therefore, although this dust box 105 is separated from the main box 141, the connection passage 145, and the cyclone outlet 146 at the bottom of the filter frame 140, the joints of both are in airtight contact. Furthermore, it is also in contact with the exhaust port 120 of the cyclone separation cylinder 104 in an airtight state.

The filter frame 140 is also airtightly in contact with the filter box 113 that accommodates the second auxiliary filter 112 provided in front of the electric blower 107 . In order to realize the abutment in an airtight state as described above, it is preferable to provide an elastic sealing material between the abutment portions.

When the electric blower 107 is activated, the vacuum cleaner body 1 constituted in this way sucks the dusty air from the inlet pipe 115 of the cyclone separation cylinder 104 into the cyclone separation cylinder 104 through its suction force, and rotates the dusty air in the cyclone separation cylinder 104. The dust is centrifugally separated, rises above the inside of the cyclone separation drum 104 , and is then transported to the side of the dust collecting box 105 . The dedusted air flows from the inner cylinder 131 of the cyclone separation cylinder 104 to the exhaust port 120 through the filter screen 133 . This filter screen 133 has the function of preventing dust such as fiber dust and paper from passing through.

The air coming out of the exhaust port 120 flows to the second auxiliary filter 112 through the connecting passage 145 and the outlet port 146 of the cyclone separation unit.

The dusty air coming out of the communication port 117 of the cyclone separation drum 104 flows into the dust box 105 through the upper opening 118 arranged on the top of the dust box 105, and the dust in the air is intercepted by the first auxiliary filter 106 and accumulated in the first auxiliary filter. in front of the filter 106. The air passing through the first auxiliary filter 106 flows toward the second auxiliary filter 112 side.

The dust removal performance of the first auxiliary filter 106 is determined by the ability of its filter material, and it is best to have the ability to separate dust to the μm level. However, if the dust removal capacity is too high, it is easy to clog prematurely, so it is best to make a decision based on the overall dust removal capacity.

Since almost all the dust entering the vacuum cleaner body 1 is accumulated in the dust box 105, the dust box 105 can be directly taken out from the vacuum cleaner body 1 for dust removal when cleaning up the garbage. It is best to clean up the rubbish when the dust box 105 is not completely full of dust. Therefore, as shown in FIG. 9 , the dust box 105 is provided with a garbage cleaning line 155 at a position opposite to the upper opening 118 , and the user can refer to this line to perform garbage cleaning operations. The garbage cleaning line 155 is neither horizontal nor vertical, because when garbage is accumulated in the dust box 105, the part close to the upper opening 118 is finally buried by dust, so a certain inclination is set according to the accumulation of dust.

In addition, since this embodiment divides the air flow of the vacuum cleaner body 1 into two routes as shown in FIG. compressed state. Since the more dust is accumulated, the pressure difference is greater, so it also has the characteristic that the more dust there is, the greater the compression amount will be. The dust in the dust box 105 accumulates in layers in front of the first auxiliary filter 106 and accumulates together with the fine dust. Therefore, since the dust is mixed among the fibrous dust, it is possible to obtain an effect that the dust is hard to fly when cleaning up the garbage.

Since the air volume passing through the exhaust port 120 of the cyclone separator 104 is smaller than that of air not passing through the dust box 105, the resistance of the cyclone separator 104 can be reduced. Therefore, it has the characteristic that the suction power of a vacuum cleaner can be improved.

In addition, the dusty air in the cyclone separation cylinder 104 flows into the cyclone separation cylinder 104 from the inlet pipe 115 of the cyclone separation cylinder 104, and the dust is centrifugally separated by the rotation in the cyclone separation cylinder 104, and rises to the cyclone separation cylinder 104. The upper part of the separation cylinder 104 is then transported to the dust box 105 side. At this time, since there is an air flow discharged from the first auxiliary filter 106 through the dust box 105, the dust centrifuged in the cyclone separation drum 104 can easily flow into the dust collection box 105 from the cyclone separation drum 104. On the one hand, since the dust can be separated at the moment it flows into the dust collecting box 105 side, the dust collection efficiency can be improved.

And, because the dust that is transported to the above-mentioned dust box 105 side after being centrifuged in the above-mentioned cyclone separation cylinder 104 is difficult to flow back to the above-mentioned cyclone separation cylinder 104, so the dust transported to the above-mentioned dust collection box 105 side will not be redistributed. Scattering can improve the efficiency of dust collection.

And, when dust adheres to the filter screen 133 of the inner cylinder 131, the volume of the air discharged from the exhaust port 120 after being dedusted by the cyclone separation cylinder 104 decreases, so the air passing through the first auxiliary filter 106 is The air volume of the dust box exhaust port 144 of the exhaust port of the dust box 105 increases. Therefore, the dust adhering to the filter 133 of the inner cylinder 131 can be transported to the dust box 105 .

And, the cross-sectional area ratio of the dust box exhaust port 144, which is the exhaust port for discharging the gas from the dust box 105 that passes through the first auxiliary filter 106, discharges the dust-removed air from the cyclone separation drum 104. The exhaust port 120 has a large cross-sectional area. Therefore, the cross-sectional area of the first auxiliary filter 106 can be increased, and the flow velocity of the air passing through the first auxiliary filter 106 can be reduced. Therefore, dust blowing from the first auxiliary filter 106 can be reduced. Furthermore, since the pressure loss when air passes through the said 1st auxiliary filter 106 can be reduced, it has the characteristic that the vacuum cleaner suction power can be further improved.

Here, by making the downstream side end 119 of the communication port 117 of the cyclone separation cylinder 104 circular, or affixing it with a smoother (low friction coefficient) material, it is possible to prevent dust from getting stuck at the downstream side end 119 . In addition, when the upper side of the downstream side end portion 119 is inclined toward the first exhaust port 144 side of the exhaust port of the dust box 105 (when the opening of the communication port 117 expands upward), Even if the downstream side end 119 of the communication port 117 is stuck with dust, the dust will move to the upper side of the above-mentioned downstream side end 119, and the air flow from the cyclone separation drum 104 to the dust collection box 105 will be removed by the dust during the movement. It can be easily peeled off from the downstream end 119 of the communicating port 117 .

As the amount of dust accumulated in the dust collecting box 105 increases continuously, the resistance encountered when passing through the dust collecting box 105 also gradually increases, so the flow rate in the dust collecting box will decrease accordingly. Therefore, when there is a lot of dust that is likely to generate an odor, the amount of air passing through the dust box is reduced, and the effect that the odor is hardly diffused to the outside of the cleaner can be obtained.

Moreover, even when the connection passage 145 and the cyclone part outlet 146 become dirty, it can clean easily with the dust box 105 taken out.

And, since the inlet pipe 115 and the inner tube 131 of the cyclone separator 104 are located at the bottom, so the communication 117 of the cyclone separation drum 104 and the upper opening 118 of the dust box 105 can be set at the top, because the dust entering the dust box 105 is Since it falls due to gravity, it can be prevented from overflowing to the cyclone separation cylinder 104 .

And, since the upper opening 118 of the dust collecting box 105 is arranged in front of the above-mentioned dust collecting box 105, when the vacuum cleaner body 1 stands up for storage, since the upper opening 118 of the dust collecting box 105 is arranged in the front of the above-mentioned dust collecting box 105 Therefore, the dust entering the dust box 105 can be prevented from overflowing to the cyclone separation cylinder 104 .

Since the dust box 105 is arranged on the side of the cyclone separation cylinder 104, the length of the cyclone separation cylinder 104 can be lengthened without raising the height of the vacuum cleaner body 1, so it has the feature of improving the garbage separation ability by swirling flow.

Under the situation that electric blower 107 stops, can block inlet pipe 115, in order to make above-mentioned inlet pipe 115 and above-mentioned cyclone separation drum 104 communicate under the situation of above-mentioned electric blower 107 operation, can be provided with to above-mentioned cyclone separation drum near inlet pipe 115 A valve that rotates on the side of the guide wall 137 of the inner cylinder 131 disposed in the inner cylinder 104 . In this case, when the operation of the electric blower 107 is stopped and the cyclone separation drum 104 is taken out, it is possible to prevent dust from overflowing.

As shown in Figure 15, it is also possible to set the cyclone separation cylinder 104 and the dust collection box 105 into one. Between the boxes 105, the exhaust port 120 and the connecting passage 145 are integrally formed to maintain complete airtightness, so it is possible to suppress the increase in loss caused by leakage, etc., and not only can further improve the dust collection power, but also can suppress Dust leaks and spills.

Although the connection passage 120, the connection passage 145, and the connection port 146 can also be formed by other members that are in contact with the lower case 101, they cannot be easily cleaned when the connection passage is contaminated, but the total number of parts that maintain airtightness can be reduced. . Furthermore, since the direction to maintain airtightness can be set to the up-down direction, it is characterized in that it is easy to maintain airtightness.

Although the above narration is the situation that the cyclone separation drum 104 is used as a separation chamber for separating dust from dusty air, the above-mentioned separation chamber is not limited to the cyclone separation drum 104. The upper part of the separation chamber is provided with a communication port connected to the dust collection box located on the side of the separation chamber, and the inside of the separation chamber is provided with a guide plate that forms an airflow that transports air and dust from bottom to top. Such an electric vacuum cleaner , the hose connection port communicating with the inlet portion may also be disposed at the center lower portion in the height direction of the separation chamber. Therefore, since the hose connection port is disposed at the lower part of the cleaner body, when the cleaner body is pulled back through the hose using a manual operation tube, the cleaner body is difficult to overturn and can be pulled back stably.

Next, a second embodiment of the present invention will be described with reference to the drawings. Fig. 16 is a perspective view showing the appearance of an upright electric vacuum cleaner according to an embodiment of the present invention. Fig. 17 is a side view of the vacuum cleaner shown in Fig. 16 . Here, in order to explain the flow of air, a part is shown in section. Fig. 18 is a longitudinal sectional view of a dust collecting part 460 in which the cyclone separation cylinder 404 and the dust collecting box 405 are integrated. This figure is a vertical sectional view seen from the back side of the cleaner body 301 . FIG. 19 is a view of dust collecting unit 460 viewed from the back side of cleaner body 301 . Fig. 20 is a sectional view showing the B-B section in Fig. 19 .

A suction port 305 opening to the floor is mounted on the vacuum cleaner body 301 and can rotate within a predetermined angle range, and a rotating brush 306 facing the ground is arranged in the suction port 305 . The dust collector 460 is detachably attached to the cleaner body 301 . The dust collection part 460 includes a cyclone separation cylinder 404, a dust collection box 405 arranged beside the cyclone separation cylinder 404, and a filter frame 440 on the side of the dust collector body 301 of the dust collection part 460, and the filter frame 440 can rotate freely. . In order to drive the rotating brush 306 in the suction port 305 and the blower of the electric blower through the rotation of the rotating shaft of the electric blower (not shown in the figure), the electric blower is arranged above the above-mentioned suction port 305 and at the above-mentioned dust collecting part of the bottom of the vacuum cleaner body 301. 460 below. Through the suction force of this electric blower, the above-mentioned suction port 305 is used to suck air, and the dust mixed with the suction airflow is sucked in. The dust-laden air sucked is collected in the cyclone separation drum 404 through the telescopic connecting pipe 304 and the hose 302. In the dust box 405 on the side. In addition, a gripping portion 303 for the user to grip is provided on the upper part of the vacuum cleaner body 301 , and the vacuum cleaner can be moved forward and backward through the manipulation of the gripping portion 303 .

The vacuum cleaner body 301 flows the dusty air from the inlet pipe 415 into the cyclone separation cylinder 404 through the hose 302 and makes it rotate, and the dust is separated under the action of centrifugal separation, and the dust passes through the upper communication port 417 and the upper opening. 418 is transported in the dust box 405. Exhaust from the cyclone separation cylinder 404 passes through the inner cylinder 431 and is discharged into the connection passage 445 provided at the bottom of the dust collection box 405 through the exhaust port 420 provided at the bottom of the cyclone separation cylinder 404 . In addition, a part of the air flows into the dust box 405 and dust is captured by the first auxiliary filter 406 . The exhaust from the dust box 405 passes through the first auxiliary filter 406 , is discharged from the dust box exhaust port 444 , and is sucked by the electric blower through the second auxiliary filter 412 . At this time, the exhaust gas from the cyclone separation drum 404 also flows out of the cyclone part outlet 446 from the above-mentioned exhaust port 420 through the connecting passage 445, and is electrically driven by the second auxiliary filter 412 together with the exhaust gas from the dust box 405. Blower suction. The exhaust from the electric blower passes through the filter and is discharged outside the machine through the exhaust port 307 .

The inlet pipe 415 of the cyclone separation cylinder 404 and the hose connection port 416 are abutted in an airtight state, and the cyclone separation cylinder 404 and the inner cylinder 431 are abutted in an airtight state through an elastic body airtight gasket 451, and the cyclone separation cylinder The exhaust port 420 at the lower part of 404 and the connecting passage 445 are in contact with each other in an airtight state through the elastic body airtight gasket 452. The main bodies 301 are energized so as to be in contact with each other in an airtight state. The filter frame 440 is equipped with an elastic body airtight gasket 450 on the side of the dust box 405 and the connection passage 445 and on the side of the cleaner body 301 . Therefore, when attaching the dust collecting part 460 to the cleaner main body 301, the dust collecting part 460 and the cleaner main body 301 are energized and attached so as to abut against each other in an airtight state. Here, because the air in and out between the above-mentioned vacuum cleaner body 301 and the above-mentioned dust collecting part 460 is in the front and rear direction of the above-mentioned vacuum cleaner body 301, this airtight state can be brought into play by applying force in the front and rear direction of the vacuum cleaner body 301, which has the advantage of being easy to obtain. characteristics of airtightness. When the dust collecting part 460 is pressed into the vacuum cleaner body 301, the dust collecting part 460 is fixed on the vacuum cleaner body 301 by the latch 461 provided on the vacuum cleaner body 301, so as to realize an airtight state, and dust leakage and overflow can be suppressed.

In addition, the axial direction of the cyclone separation cylinder 404 is not vertical but inclined, so the axial length of the cyclone separation cylinder 404 can be lengthened without increasing the height direction of the vacuum cleaner 301 to improve the dust collection performance.

Hold the handle 423 , press the unloading switch 462 , and the cyclone separator 404 and the dust box 405 can be separated and taken out from the vacuum cleaner body 301 . A first auxiliary filter 406 and a filter frame 440 are provided on the exhaust side of the dust box 405 .

If a filter 406b such as a sponge having a large amount of dust collection is arranged in the filter box 406a on the upstream side of the first auxiliary filter 406, the dust emitted from the first auxiliary filter 406 can be prevented from being blown away. At this time, if the filter 406b is made of an ether-based material or the like and can be cleaned, it is convenient for handling. And if the upstream side of this filter 406b is provided with the filter screen 406c that is embedded and molded as one with the filter box 406a and through anti-static treatment, then when cleaning up the garbage, due to the increase of the dust coming out from the 1st auxiliary filter Detachable, so garbage is easy to peel off, which is ideal. In addition, if the first auxiliary filter 406 is provided with filters such as non-woven fabrics and filter nets, leakage of dust from the dust box 405 can be better prevented. The first auxiliary filter 406 formed of such a non-woven fabric is integrated with the filter frame 440 to facilitate handling.

If the second auxiliary filter 412 is made of pleated non-woven fabric or the like, the air passing area of the filter can be increased, so that the ventilation resistance can be reduced, and the suction power can be greatly increased. And because the flow velocity of the air passing through the filter is reduced, the efficiency of dust capture can be improved.

If the second auxiliary filter 412 is divided into the cyclone part outlet 446 side and the dust box exhaust port 444 side, and the height of the pleats of the filter on the cyclone part outlet 446 side is increased, the separation from the cyclone can be further reduced. The flow velocity when the exhaust gas from the cylinder 404 passes through the second auxiliary filter 412 can reduce the ventilation resistance and effectively capture the dust that cannot be separated and captured in the cyclone separation cylinder 404 .

The hose connection port 416 is located at the center of the cleaner main body 301 in the width direction when viewed from above, and is disposed on the rear surface of the main body 301 . The central axis of the cyclone separation cylinder 104 is located at a position offset from the center of the cleaner body 301 in the width direction, and the inlet pipe 415 for allowing air to flow in a substantially tangential direction of the cyclone separation cylinder 404 is disposed at the end of the dust collection part 460 . That is, when the dust collecting unit 460 is attached to the cleaner body 301 , the dust-laden air flows into the inlet pipe 415 from the back side of the cleaner body 301 from the end side in the left-right direction. In addition, the dust box 405 is arranged on the side opposite to the cyclone drum 404 with respect to the central axis of the cleaner body 301 in the width direction, on the side of the cyclone drum 404 . In addition, the exhaust gas from the dust collecting unit 460 merges with the air passing through the first auxiliary filter 406 and the air flowing out from the cyclone unit outlet 446 to form a flow path communicating with the back side of the cleaner body. With this arrangement, the length of the main body can be shortened, achieving the purpose of small size and light weight.

If the cyclone separation drum 404 is arranged on the left side of the central axis of the left-right direction of the vacuum cleaner body 301 viewed from the front, the first auxiliary filter 406, the second auxiliary filter 412 and the inflow of the electric blower are arranged on the right side. On the side, since the air flow path from the second auxiliary filter 412 to the electric blower is shortened, the loss due to friction can be reduced. At this time, the timing belt for driving the rotating brush 306 arranged in the suction port 305 is preferably arranged on the left side of the cyclone drum 404 . In addition, the same effect can be obtained by symmetrically replacing the parts arranged on the right side with the parts arranged on the left side.

The direction in which the dust centrifuged by the cyclone separation cylinder 404 flows out from the cyclone separation cylinder 404 through the communication port 417 is the rotation direction in the cyclone separation cylinder 404 and is the tangential direction of the cyclone separation cylinder 404 . Therefore, in the present embodiment, both the communication port 417 of the cyclone separation cylinder 404 and the upper opening 418 of the dust collection box 405 communicating with the communication port 417 can be arranged in the first auxiliary filter that is opened and closed from the dust collection box 405. 406 is the farthest front side of the cleaner body 301 (the side opposite to the hose connection port 416). Among them, the dust centrifugally separated by the cyclone separation drum 404 starts to accumulate from the vicinity of the opened and closed first auxiliary filter 406, and then the dust is compressed from the communication port 417 of the cyclone separation drum 404 to the dust collection port that communicates with the communication port 417. The side of the upper opening 418 of the box 405 is piled up sequentially, so before the above-mentioned dust box 405 is filled with dust, the dust is difficult to block the above-mentioned communication port 417 and the above-mentioned upper opening 418, and more dust can be accumulated. That is, the capacity of the above-mentioned dust box 405 can be effectively utilized.

In addition, because the first auxiliary filter 406 is installed in the dust collecting part 460 near the back side of the cleaner body 301, the filtering area of the first auxiliary filter 406 can be made larger than the area of the lower part of the dust collecting part 460. Therefore, the ventilation resistance of the dust collecting part 460 can be reduced, and the loss can be reduced.

The ribs 456 and 457 are arranged in the dust box 405 to suppress the vortex generated in the dust box 405 . Therefore, it is possible to suppress the dust that has flowed into the dust box 405 from flowing into the cyclone tube 404 again. Since dust can be suppressed from re-scattering to the cyclone separation cylinder 404, dust collection efficiency can be improved. Furthermore, if the rib 457 is disposed on the bottom surface of the dust collecting box 405, the strength of the dust collecting box 405 can be improved. Therefore, the dust box 405 is hardly deformed, and the dust collected in the dust box 405 can be prevented from overflowing to the connecting passage 445 side.

This structure can accumulate more dust in the dust box 405, so the cycle of garbage cleaning can be extended. And because the fiber dust in the dust is mixed with fine dust such as earth and sand and is compressed, it has the feature that the fine dust is difficult to scatter when cleaning up garbage.

When the dust collecting part 460 is installed on the cleaner body 301, since the communication port 417 and the upper opening 418 of the dust box 405 can be arranged on the front side of the cleaner body 301, it can be shown at a position near the upper opening 418. Trash removal line 455. Therefore, the user can perform the garbage cleaning operation referring to the garbage cleaning line 455 on the front side of the cleaner body 301 arranged at an easily visible position. Because when dust is accumulated in the dust box 405, the part close to the upper opening 418 is finally buried by the dust, so the garbage cleaning line 455 is set with a certain inclination according to the accumulation of dust.

When cleaning up the garbage, hold the handle 423 of the dust collecting part 460 , press the unloading switch 462 , and separate and take out the dust collecting part 460 from the vacuum cleaner body 301 . Next, the filter frame 440 is opened and manipulated by pressing down the lever 442 integrated with the clamp portion holding the filter frame 440 , using the opening and closing shaft 443 of the filter frame 440 as a rotation axis. The cleaning of the first auxiliary filter 406 can be performed by washing the first auxiliary filter 406 . At this time, since the dust box 405 extends from the front side of the cleaner body 301 to the back side (the filter frame 440 side), it is easy to clean the dust accumulated in the dust box 405, and it is difficult for the dust to remain on the Inside the dust collecting box 405.

When the filters are clogged, the first auxiliary filter 406 is washed with water and dried naturally before use. In addition, the second auxiliary filter 412 is also taken out, washed with water, dried naturally, and then installed.

The inner cylinder 431 is removed from the outer cylinder 435 of the cyclone separation cylinder 404 to clean the filter screen 433 of the inner cylinder 431, and then the filter screen 433 is installed on the inner cylinder 431 after cleaning. In this way, when excessive dust is inhaled so that the dust box 405 will overflow, although dust is accumulated in the cyclone separation drum 404, as long as the above-mentioned inner cylinder 431 is unloaded from the outer cylinder 435 of the cyclone separation cylinder 404 The dust can be easily removed.

The inner cylinder 431 is composed of a partition wall 432 , a cylindrical portion 434 , and a guide wall 437 . A resin fiber mesh is molded integrally with the cylindrical portion 434 as the filter mesh 433 . The filter screen 433 can be formed on the cylindrical part of the side, can also be formed on the upper plane part of the cylindrical part, and can also be formed on the upper plane of the cylindrical part and the cylindrical part of the side at the same time. The filter 433 is not all provided on the entire circumference of the cylindrical portion of the inner tube 431 side, and the filter 433 and the opening are not provided at about 90 degrees near the inlet pipe 415 . Therefore, even if fine dust such as hair flows in from the inlet pipe 415 , it will not directly contact the filter 433 , effectively preventing the phenomenon of puncturing and entanglement.

Furthermore, since the filter 433 is pressed into the inner cylinder 431, it is preferable to provide ribs 436 of the inner cylinder on the inner diameter side of the filter. If antistatic treatment is performed on the filter net 433, the dust adhering to the filter net 433 is easily separated, thereby facilitating cleaning.

The partition wall 432 of the inner tube 431 is formed so that the air flow in the cyclone separation cylinder 404 rises upward in a spiral manner in the cyclone separation cylinder 404 . Therefore, the dust flowing into the cyclone separation cylinder 404 from the inlet pipe 415 is rotated in the above-mentioned cyclone separation cylinder 404 while rising along the spiral partition wall 432, is centrifugally separated, and is transported through the communication port 417 and the upper opening 418. to dust box 405. In this way, since the above-mentioned partition wall 432 is raised upward in a spiral shape, even if it is a vacuum cleaner that operates at a low air volume, the dust will be strongly lifted in the above-mentioned cyclone separator 404, so that the dust can be transported to The dust collecting box 505 can improve the separation performance of dust.

The height of the guide wall 437 is greater than that of the inlet pipe 415 . Therefore, the air flow flowing in from the inlet pipe 415 and the air flow rotating in the cyclone separation cylinder 404 are hardly disturbed and mixed. While preventing the confusion caused by this, it is possible to avoid rapid expansion during inflow and reduce losses. Moreover, if the cross-sectional shape of the inlet pipe 415 adopts a substantially rectangular shape with four corners removed, when the air flow flows into the cyclone separation cylinder 404 from the inlet pipe 415, it can flow in along the partition wall 432 of the outer cylinder 435 and the inner cylinder 431, and can Reduce the loss caused by the chaos of flow.

The inner surface of the cyclone separation drum 404 and the inner surface of the dust collection box 405 are treated with a clean UV hardening coating. Therefore, when the dust flows into the above-mentioned cyclone separation drum 404 and flows into the above-mentioned dust collection box 405 after being centrifuged, even if the dust collides with the inner surface of the cyclone separation drum 404 and the inner surface of the dust collection box, and rubs Under the environment, the surface is also difficult to be damaged and dirt is not easy to adhere to, and at the same time, the abrasion resistance and pollution resistance can be improved. Therefore, when the outer cylinder 435 of the cyclone separation cylinder 404 and the dust box 405 are made of a transparent plastic material, the accumulation of dust can be confirmed visually.

In addition, by forming the cyclone separation cylinder 404 and the dust collection box 405 with an antistatic tree indicator agent, or coating the surface with an antistatic agent, the dust is difficult to adhere to the above-mentioned cyclone separation cylinder 404 and the dust collection box 405, and the cost of cleaning can be reduced. frequency.

When the dust collecting part 460 is produced by integrally forming the cyclone separation cylinder 404 and the dust collection box 405, the above-mentioned cyclone separation cylinder 404 part slides the mold downward, and the above-mentioned dust collection box 405 makes the mold slide from the handle 423 along the rib 457. Just slide it sideways to the first auxiliary filter 406 side. In this case, a space 419 is generated under the communication port 417 . If the space 419 is a concave portion with an opening on the front side of the cleaner body 301, it will be oblate in appearance, which is not satisfactory. Moreover, this position is located near the handle 423, and when the above-mentioned handle 423 is held by hand, it will be difficult to hold it. Therefore, it is preferable that the space 419 below the communication port is configured as a space 419 having an opening on the lower side of the dust collecting part 460 .

The outer cylinder 435 of the cyclone separation cylinder 404 is provided with an inlet pipe 415 as its air inlet at the central lower part of the central axis direction length of the cyclone separation cylinder 404, so that the air is substantially tangential to the cylindrical cyclone separation cylinder 404. Enter the settings like this. Therefore, the hose connection port 416 can be provided under the cleaner body 301, the length of the hose 302 can be shortened, and the effect of reducing losses such as friction can be obtained.

A communication port 417 is provided at the central upper part of the cyclone separating cylinder 404 to allow dust to flow into the dust collecting box 405 together with the air. An inner cylinder 431 is provided at the lower part of the cyclone separation cylinder 404 and is connected to the exhaust port 420 at the lower part. Since the exhaust port 420 can be provided below the cyclone separation cylinder, the flow path to the electric blower can be shortened. Through such a configuration, the height of the vacuum cleaner body 301 can be reduced, which can achieve small size and light weight, and can also achieve the effect of reducing friction and other losses.

Claims (6)

1. An electric vacuum cleaner, equipped with: a cyclone separation cylinder that separates dust from dust-laden air and is axially oriented in a vertical direction; The dust collection box on the side of the cyclone separation cylinder is provided with a communication port reaching the dust collection box on the upper part of the cyclone separation cylinder, and it is characterized in that, The dust-laden air flowing into the cyclone separation cylinder from the inlet portion of the cyclone separation cylinder rotates in the cyclone separation cylinder, Inside the cyclone separation cylinder, a guide plate is provided to make the swirling flow of the dust-laden air flowing in from the inlet part flow from bottom to top, An inner cylinder is arranged at the bottom of the cyclone separation cylinder, and the inner cylinder has a filter screen on the side of the cylinder part, and the exhaust gas from the cyclone separation cylinder flows in through the filter screen, The guide plate is formed by a partition wall wound helically around the cylindrical portion of the inner cylinder. 2. The electric vacuum cleaner according to claim 1, further comprising a guide wall connecting the inlet portion and the cylindrical portion of the inner cylinder. 3. The electric vacuum cleaner according to claim 2, wherein the guide wall is higher in height than the inlet portion. 4. The electric vacuum cleaner according to claim 1, wherein the height of the uppermost part of the spiral partition wall is higher than the height of the inlet of the cyclone separation cylinder. 5 . The electric vacuum cleaner according to claim 1 , wherein the cyclone separation cylinder is formed in a cylindrical shape, and the inlet portion is arranged in a tangential direction of the cyclone separation cylinder. 6 . The electric vacuum cleaner according to claim 1 , wherein the inlet portion is disposed at a lower portion in the center of the central axial length of the cyclone separation cylinder. 7 .

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