JP4425899B2 - Vacuum cleaner - Google Patents

Description

  The present invention relates to a vacuum cleaner.

  Conventionally, the vacuum cleaner has a cyclone method and a filter method, and both of them suck the dust simultaneously with the air, accumulate the dust in the dust collecting portion of the cleaner body, and discard the accumulated dust.

  However, dust having a particle size of 10 micrometers or less (hereinafter referred to as fine dust) is difficult to be affected by centrifugal force due to its small mass. Therefore, in the cyclone system that sucks dust up to the dust cup and swirls at high speed and separates the dust by centrifugal force, in the case of dust of several microns, the mass of the dust is so light that it is centrifuged from the state dispersed in the air flow. There was a problem that separation could not be performed. Even with a well-developed centrifugation, it was difficult to collect fine dust having a particle size of 4 micrometers or less.

  Therefore, in the cyclone type vacuum cleaner, in order to further collect fine dust, another filter such as a HEPA filter (High Efficiency Particulate Air Filter) is required downstream of the dust collector.

  On the other hand, even with normal vacuum cleaners, dust collection filters made of paper packs or cloth can collect fine dust by making the filter eyes finer. Wind suction is weakened. Therefore, it has been difficult to suck large garbage. For this reason, in order to capture fine dust, it is necessary to provide multiple finer filters downstream of the dust collection filter, or to provide another expensive filter such as a HEPA filter. .

  As a technique of a vacuum cleaner that captures fine dust that could not be collected by such a dust collector, as disclosed in JP-A-4-341228 (Patent Document 1), provided on the downstream side of the electric blower, An electric vacuum cleaner having an electric dust collector that electrically collects fine dust, dust, and the like is described.

  Japanese Patent Laying-Open No. 2005-324094 (Patent Document 2) describes a particle aggregator that collects fine particles with a conductive material to which a voltage is applied after the fine particles are charged using corona discharge. . This is because the particles collected on the surface of the conductive material agglomerate, and when a certain size is reached, the aggregated particles are separated from the conductive material by the air stream and exhausted. It is a vessel.

Japanese Patent No. 2517877 (Patent Document 3) describes that particles are charged by frictional contact charging. This publication describes a method for producing a fine particle composite in which fine particles are charged with positive static electricity on one side and negative static electricity on the other, and then mixed and electrically coupled together. Are listed.
JP-A-4-341228 JP 2005-324094 A Japanese Patent No. 2517877

  However, when multiple filters are provided in the air passage of the vacuum cleaner to collect fine dust, the suction force is reduced, so that it is difficult to strongly suck large dust and dust with large mass.

  In the particle aggregator described in Japanese Patent Application Laid-Open No. 2005-324094 (Patent Document 2), corona discharge is used to charge particles, and therefore a high voltage portion is provided in the flow path. In such a case, if an object corresponding to the flow path diameter, particularly a thread-like object, is caught on the high voltage portion, there is a risk of fire or the like due to an electrode short circuit.

  In addition, in the method for producing a fine particle composite described in Japanese Patent No. 2517877 (Patent Document 3), using two tubes, fine particles passing through one tube are positively charged, and fine particles passing through the other tube are After charging with negative static electricity, they merge.

  In order to provide two flow paths in this way, it is necessary to branch one intake port halfway or use two intake ports. However, if one intake port is branched halfway, particulates are likely to be deposited at the branch point. If this is avoided by using two suction ports, the distance between the respective suction ports must be increased, and the occupied area increases and the structure becomes complicated.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a vacuum cleaner having a simple structure and capable of charging and agglomerating dust without reducing the suction flow rate.

A vacuum cleaner according to the present invention includes a suction port body having an intake port, an electric blower that generates intake air, a main body having an electric blower inside, and an intake pipe that communicates between the suction port body and the main body. And a charging pipe having a first charging portion that positively charges dust contained in the intake air and a second charging portion that negatively charges dust contained in the intake air, and the intake pipe is connected to the suction port body A first intake pipe, a second intake pipe in which a part of the first intake pipe is inserted inside and connected to the first intake pipe on the downstream side of the first intake pipe with respect to the intake air; A first connection pipe connected to the second intake pipe on the downstream side of the two intake pipes; a third intake pipe connected to the first connection pipe on the downstream side of the first connection pipe with respect to the intake air; A second connection pipe for connecting the third intake pipe and the main body downstream of the third intake pipe with respect to the intake air; The first intake pipe has rigidity and a relatively small diameter, the second intake pipe has rigidity and a relatively large diameter, and the first connection pipe has rigidity and a relatively large diameter. Including a handle for the user to hold, the third intake pipe is flexible and has a relatively large diameter, and the second connection pipe is rigid and has a relatively large diameter In the vacuum cleaner, the charging pipe is disposed inside the first connecting pipe or the second connecting pipe , and a downstream end or an upstream end of the charging pipe is a third intake pipe. that has been inserted into.

  The longer the length of the charging tube in the intake direction, the higher the dust aggregation effect. On the other hand, when the vacuum cleaner is provided with a charging tube, the charging tube must be arranged at a position where the intake air passes, but depending on the arrangement position, the length of the charging tube may be limited, The operability is reduced.

  Therefore, by arranging the charging tube inside the first connecting tube or the second connecting tube, the dust can be charged and aggregated with a simple structure without reducing the suction flow rate. A vacuum cleaner can be provided.

A vacuum cleaner according to the present invention includes a suction port body having an intake port, an electric blower that generates intake air, a main body having an electric blower inside, and an intake pipe that communicates between the suction port body and the main body. And a charging pipe having a first charging portion that positively charges dust contained in the intake air and a second charging portion that negatively charges dust contained in the intake air, and the intake pipe is connected to the suction port body A first intake pipe, a second intake pipe in which a part of the first intake pipe is inserted inside and connected to the first intake pipe on the downstream side of the first intake pipe with respect to the intake air; A first connection pipe connected to the second intake pipe on the downstream side of the two intake pipes; a third intake pipe connected to the first connection pipe on the downstream side of the first connection pipe with respect to the intake air; A second connection pipe for connecting the third intake pipe and the main body downstream of the third intake pipe with respect to the intake air; The first intake pipe has rigidity and a relatively small diameter, the second intake pipe has rigidity and a relatively large diameter, and the first connection pipe has rigidity and a relatively large diameter. Including a handle for the user to hold, the third intake pipe is flexible and has a relatively large diameter, and the second connection pipe is rigid and has a relatively large diameter In the vacuum cleaner, the charged pipe is disposed inside the first connection pipe or the second connection pipe, and the third intake pipe is partially inserted into the first connection pipe to be the first connection pipe. The charging pipe is disposed at least partially inside the third intake pipe and disposed inside the first connection pipe, and the downstream end of the charging pipe located on the downstream side of the intake air is than the downstream end of the first connecting pipe located downstream of the intake, it positioned upstream of the intake.

  By doing so, even if the flexible third intake pipe is bent, the degree of bending is limited by the rigid first connection pipe, and the charged pipe inserted into the third intake pipe Such stress is greatly relieved. Therefore, it is possible to increase the inner diameter of the charging tube so that the pressure loss in the charging tube does not increase, or to make the charging tube have a double structure.

  Moreover, since the downstream end of the charging tube is encased in the third intake pipe so as to have a highly airtight structure, the components constituting the charging tube need not be ultrasonically welded or screwed. Even air does not leak. For this reason, the profit rate can be improved by shortening the manufacturing time of the charging tube, improving the manufacturing efficiency, and reducing the manufacturing cost.

A vacuum cleaner according to the present invention includes a suction port body having an intake port, an electric blower that generates intake air, a main body having an electric blower inside, and an intake pipe that communicates between the suction port body and the main body. And a charging pipe having a first charging portion that positively charges dust contained in the intake air and a second charging portion that negatively charges dust contained in the intake air, and the intake pipe is connected to the suction port body A first intake pipe, a second intake pipe in which a part of the first intake pipe is inserted inside and connected to the first intake pipe on the downstream side of the first intake pipe with respect to the intake air; A first connection pipe connected to the second intake pipe on the downstream side of the two intake pipes; a third intake pipe connected to the first connection pipe on the downstream side of the first connection pipe with respect to the intake air; A second connection pipe for connecting the third intake pipe and the main body downstream of the third intake pipe with respect to the intake air; The first intake pipe has rigidity and a relatively small diameter, the second intake pipe has rigidity and a relatively large diameter, and the first connection pipe has rigidity and a relatively large diameter. Including a handle for the user to hold, the third intake pipe is flexible and has a relatively large diameter, and the second connection pipe is rigid and has a relatively large diameter In the vacuum cleaner, the charging tube is disposed inside the first connecting tube or the second connecting tube, and the charging tube is rotatable around the axis about the direction in which the intake air flows. that have been held.

  When the charging tube is held so that the positions of the first or second connecting tube and the charging tube are fixed to each other so that the charging tube does not rotate inside the first or second connecting tube, cleaning is performed. The torsional force works during handling, making it difficult for the user to work.

  Thus, by doing this, the operability of the electric vacuum cleaner is improved and the user can operate without being stressed, so that the cleaning time, power consumption, and the like can be increased. Moreover, since the force caused by the rotation of the flexible third intake pipe is less likely to be applied to the charging pipe, the charging pipe can be prevented from being deformed or damaged, and a safe and long-life vacuum cleaner can be achieved. can do.

  As described above, according to the present invention, it is possible to provide a vacuum cleaner that has a simple structure and can charge and agglomerate dust without reducing the suction flow rate.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIGS. 1 to 4 are diagrams for explaining that dust is charged and aggregated by the charging portion of the charging tube according to the embodiment of the present invention.

  FIG. 1 is a diagram for explaining the configuration of first and second charging portions of a charging tube as one embodiment of the present invention.

  As shown in FIG. 1, the first charging unit 10 and the second charging unit 11 have a half pipe shape in which a cylindrical tube is divided into two in the axial direction. The first charging unit 10 is made of a material that positively charges dust. The material of the second charging unit 11 is made of a material that easily charges dust negatively. This half-pipe shape can be appropriately deformed depending on the charging performance and the function of the components.

  FIG. 2 is a diagram for explaining the assembly of the first and second charging portions of the charging tube as one embodiment of the present invention.

  As shown in FIG. 2, when the first charging unit 10 and the second charging unit 11 shown in FIG. 1 are combined, they can be combined with the charging tube 12 shown in FIG. Is possible. A plane perpendicular to the one joining surface 13 and the other joining surface 14 of the first charging unit 10 and the second charging unit 11 in which the charging tube 12 is formed is defined as an AA ′ cross section.

  FIG. 3 is a cross-sectional view of the charging tube shown in FIG. 2 as seen from the direction of the line AA ′.

  FIG. 3 illustrates a model in which fine dust is charged according to the present invention. Hereinafter, the charged state of dust will be described with reference to FIG.

  When an air flow is generated in the intake pipe due to the connection with the electric blower, fine dust 15A, fine dust 16A, and fine dust 17A of about several microns are transferred from the inlet 18 to the outlet 19 of the charging pipe 12 as dust. When the fine dust 15A is conveyed near the first charging unit 10 and comes into contact with the first charging unit 10, the fine dust 15A is positively charged by the frictional charging action. Further, when the fine dust 17A is conveyed near the second charging unit 11 and comes into contact with the second charging unit 11, the fine dust 17A is negatively charged by the frictional charging action. The fine dust 15A positively charged in this manner is mixed with the negatively charged fine dust 17A in the charging tube 12, and is attracted to each other by electrostatic force, thereby forming a dust lump 19A. By appropriately setting the shapes of the charging tube 12 and the charging unit to be long, the dust mass 19A comes into contact with the first charging unit 10 and the second charging unit 11 again and is further charged. In this way, the fine dust 15A, the fine dust 17A, and the dust lump 19A are repeatedly charged and adsorbed, so that the size of the dust lump 19A is further increased. In FIG. 3, the first charging unit 10 or the second charging unit 11 and fine dust are illustrated so as to perform one suction in one collision, but the length and diameter of the charging tube 12 should be set appropriately. Thus, a plurality of contacts can be performed. Further, by appropriately selecting the material, it is possible to select and set the charge amount when the fine dust 15A, fine dust 17A, the first charging unit 10 and the second charging unit 11 are in contact with each other.

  FIG. 4 is a diagram showing a model in another case where a dust mass is formed according to the present invention.

  As shown in FIG. 4, the fine dust 15B and the fine dust 17B that are in contact with the first charging unit 10 and the second charging unit 11 are adsorbed to each other by an air current or static electricity suction action as in FIG. As a result, a larger dust mass (cluster) 19B is formed by sucking the fine dust 16B that is floating or not charged or is slightly charged by air.

  The charging tube may be provided with a raised portion on the inner surface.

  FIG. 5 is an explanatory view of the structure of the charging tube of the present invention in the case where a bulge is provided on the inner surface as one embodiment of the present invention. Moreover, FIG. 6 is a figure explaining the detailed shape of the protruding part of FIG.

  The structure on the inner surface side of the charging tube will be described with reference to FIGS.

As shown in FIG. 5, a large number of raised portions 102 and raised portions 103 are formed as deflection portions from the inlet 18 to the outlet 19 of the charging tube 2 . The charging tube 2 has a tube length of 200 mm and an inner diameter of 40 mm. When air toward the downstream airflow from the upstream of the charging pipe 2, air flow and dust around the charging tube 2, a number of ridges 102, a direction by the ridge 103 in the circumferential direction according to the direction of the slope of the raised portion Heading downstream while being changed. The shape of the raised portion is a flat triangular pyramid shape. As shown in FIG. 6 , the entrance side is provided with two gentle slopes facing each other, and the exit side has a steeper angle than the slope on the entrance side. Is provided.

The raised portion 102 is selected from materials that can positively charge dust. The raised portion 103 is selected from materials capable of negatively charging dust. A raised portion 103 is formed next to the raised portion 102 in the inner circumferential direction of the charging tube 2. Further, the raised portions 102 and then the raised portions 103 are alternately arranged from the upstream side to the downstream side of the air flow of the charging tube 2. As described above, even if the air flow including dust is deflected in the circulation direction or sucked in the downstream direction, the air flow including dust is disposed so as to alternately approach the raised portions 102 and the raised portions 103.

FIG. 6 is an explanatory diagram of a schematic shape and a cross section of the raised portion 102 or the raised portion 103. The raised portion 102 has a triangular pyramid shape, and the surface of an isosceles triangle having a base length W 1 and a height L 1 is in contact with the inner surface of the charging tube 2. The raised portion 102 and the raised portion 103 have the same shape. The apex angle θ1 of the isosceles triangle that opens from the upstream side to the downstream side of the airflow was set to 35 °. The base length W1 was 5 mm, the height L1 was 9.5 mm, and the height L2 toward the inner surface of the charging tube 2 was 2.4 mm. Three sides of the triangular pyramid that do not form the isosceles triangle are rounded with a radius of about 1 mm.

When the thus formed charging tube is used in a vacuum cleaner, when the electric blower is driven, an air flow including dust flows from the inlet 18 to the outlet 19 of the charging tube 2. Since the dust sucked from the inlet 18 passes through the raised region 101 where the raised portions 102 and the raised portions 103 are alternately arranged together with the large dust, the fine dust is successively given a positive or negative charge. The principle of charge application by contact is the same as the charging principle of the first embodiment. Since the airflow deflected with a gentle inclination from the entrance side is deflected to the inner side more suddenly than the apexes of the raised portion 102 and the raised portion 103, a small airflow vortex is easily formed. Since the formation of the small vortex and the deflection of the air flow by the inclined surface are repeated alternately, the fine dust can efficiently charge positive and negative charges. Fine dust charged positively and negatively adsorbs each other. Even if fine dust charged positively and negatively becomes a cluster and is almost neutralized electrically, the cluster is further charged by coming into contact with the raised portion 102 or raised portion 103, so that the cluster grows greatly.

  In this way, fine dust clusters can be grown larger than the fine collection limit of 4 micrometers of a well-designed cyclone dust collector, and fine dust can be collected even after centrifugation in a cyclone system. Is possible. In addition, a dust collecting filter having a large eye can be employed in a filter type vacuum cleaner. When a fine filter is used, the time until the filter is clogged becomes longer and the service life becomes longer. Even when a HEPA filter is used, the life of the HEPA filter can be extended.

  The vacuum cleaner of the present invention includes a charging tube having the first and second charging portions described above. Below, the embodiment of the vacuum cleaner of this invention is described.

(First embodiment)
FIG. 7 is a diagram showing the entire vacuum cleaner of the present invention as the first embodiment of the present invention, and FIG. 8 is an explanatory diagram of the configuration of the main body of the vacuum cleaner of the present invention.

  As shown in FIG. 7 and FIG. 8, in the vacuum cleaner 500, the suction port 501 as a suction port body includes an extended tube narrow side 511 as a first intake tube, an extended tube wide side 512 as a second intake tube, and a handle 503a. As a first connection pipe, a connection pipe 503 and a bendable suction hose 504 are sequentially connected as a third intake pipe, and a second connection pipe is connected as a main body to the cleaner body 506 via a connection portion 505. ing. The vacuum cleaner main body 506 includes an electric blower 567, a dust collection unit 561, a dust collection case 563, a HEPA filter 570, a cord reel (not shown), a control circuit (not shown) that controls energization of the electric blower 567, and the like. Contained.

  7 and 8, the flow of air containing dust is indicated by arrows. When the electric blower 567 is driven, air is sucked from the suction port 501, and the air containing dust passes through the extension tube narrow side 511, the extension tube thick side 512, the connection tube 503, the suction hose 504, and the connecting portion 505, and the vacuum cleaner. It is conveyed to the main body 506. The dust sucked into the cleaner body 506 passes through the dust collection unit 561, the electric blower 567, and the HEPA filter 570 and is discharged from the exhaust unit 571. In this way, the large-sized dust among the dust sucked from the suction port 501 is accumulated in the dust collecting portion 561. In addition, the air that has been cleaned by collecting dust passes through the inside of the electric motor 569 in order to cool the electric blower 567 and is exhausted out of the cleaner body 506. In addition, the side surface of the cleaner body 506 is provided with wheels 507 that are rotatably provided and support the cleaner body 506 on the floor surface 508 so as to be movable.

  The outer diameter of the extension tube narrow side 511 and the inner diameter of the extension tube thick side 512 are substantially equal, and the extension tube narrow side 511 is slid into the extension tube thick side 512 to expand and contract the entire length of the extension tube. Therefore, the user can perform cleaning in a state suitable for each person.

  As described above, if the inner surface of the charging tube is provided with a protrusion for stirring the air flow by generating turbulent flow, the dust aggregation performance of the charging tube of the present invention is improved. The longer the length of the pipe in the intake direction, the better the dust aggregation performance. Therefore, from the viewpoint of the dust agglomeration effect, it is preferable to design the vacuum cleaner 500 so as to arrange as long a charged tube as possible, and a charged tube having a length of at least about 15 to 20 cm is required. On the other hand, the charging tube must be disposed at a position where the intake air passes in the vacuum cleaner 500. However, depending on the position where the charging tube is disposed, the length of the charging tube is limited or the operability of the vacuum cleaner 500 is reduced. There are things to do. As the position where the charging tube can be arranged, the inside of any one of the extension tube narrow side 511, the extension tube thick side 512, the connection tube 503, and the connecting portion 505 can be considered.

  Accordingly, the present inventor arranges a charging tube having a first charging unit that positively charges dust contained in the intake air and a second charging unit that negatively charges dust contained in the intake air in the vacuum cleaner 500. The location was examined as follows.

(1) Examination of pressure loss (suction work rate) In vacuum cleaners, the suction work rate expressed by the product of the suction flow rate and the degree of vacuum is an important index directly related to the cleaning performance. The path pressure loss must be reduced. For that purpose, the inner diameter of each pipe through which the intake air passes should be large and uniform. In any of the extension tube narrow side 511, the extension tube thick side 512, the connection tube 503, and the connecting portion 505, the portion where the charging tube is disposed is formed in the wall of the charging tube and the inside of the charging tube. The raised ridge causes pressure loss. However, the extended tube narrow side 511 is a portion where the inner diameter of the tube is smaller than other portions and the pressure loss is inherently high. If a charged tube is arranged inside the extended tube narrow side 511, the pressure loss further increases. Therefore, it is not appropriate to arrange a charging tube inside the extended tube narrow side 511.

(2) Examination of impact resistance When cleaning with the vacuum cleaner 500, depending on the usage situation, each part of the vacuum cleaner 500 may come into contact with furniture or the like, and a large impact may be applied to the contacted part. . If such an impact is applied to the place where the charging tube is disposed, the strength of the charging tube may be reduced, or the position of the charging tube may be shifted, which may reduce the dust aggregation effect. Therefore, the position where the charging tube is disposed must be a position where the impact stress is small.

  Judging from the state of use of the vacuum cleaner 500, the connection pipe 503 is provided with a handle 503a that is directly held by the user, so that an impact is hardly applied. On the other hand, since the connection part 505 is connected from the handle 503a via the connection pipe 503 and the suction hose 504, the acting force is not easily transmitted, and the contact frequency with the furniture or the like is high. However, even if the connecting portion 505 is in contact with furniture because the user's acting force is difficult to be transmitted, the applied impact stress is small. On the other hand, the extension tube narrow side 511 and the extension tube thick side 512 not only have a high contact frequency with the furniture etc., but also the user's force is directly applied, so the impact stress when contacting the furniture etc. is also large. In particular, the extension tube narrow side 511 has a high contact frequency with furniture and the like because the distance from the user's hand is long, and the tube diameter is small, so that the strength is originally low.

  Accordingly, when the positions where the charging tubes can be arranged are arranged in descending order of impact resistance, the order of the connecting tube 503> the connecting portion 505> the extended tube thick side 512> the extended tube thin side 511 is obtained.

(3) Examination of dust agglomeration function (product life) How much the extension tube consisting of the extension tube narrow side 511 and the extension tube thick side 512 is extended and contracted depends on the user and the purpose of cleaning. There is a case where it is used in a short contracted state, that is, in a state where the extension tube narrow side 511 is accommodated in the extension tube thick side 512 at the maximum. At this time, since the extended tube narrow side 511 is slid and accommodated inside the extended tube thick side 512, most of the inner wall surface of the extended tube wide side 512 is not in contact with dust. Therefore, even if a charging tube is arranged on the thick side 512 of the extension tube, when the extension tube is shortened and used, dust hardly touches the inner wall of the charging tube and is not contact-charged. It cannot be increased.

  Further, in order to maintain the airtightness of the suction path, the outer diameter of the extension tube narrow side 511 and the inner diameter of the extension tube thicker side 512 are equal, and in order to further improve the airtightness, packing is provided at the downstream end of the extension tube narrow side 511. May be provided. In such a configuration, the outer wall surface of the extension tube thin side 511 and the inner wall surface (or packing) of the extension tube thick side 512 frequently rub against each other. Therefore, if the charging tube is arranged inside the extended tube thick side 512, the charging tube is damaged. Further, in the case where the charging tube is provided with a protrusion for generating turbulent flow on the inner surface and stirring the air flow, when such a charging tube is disposed on the extended tube thick side 512, the extended tube thick side 512 is formed into a thin extension tube. Since the side 511 cannot be accommodated inside, the expansion / contraction function is not performed. Therefore, if the charging tube is arranged on the extended tube thick side 512, the effect of dust aggregation may not be obtained, and the charging tube may be damaged.

(4) Examination of operability and handling characteristics A change in the external dimensions when a charging tube having a length of about 15 to 20 cm is arranged does not occur when the charging tube is arranged on the extension tube thin side 511 and the extension tube thick side 512. However, when arranged in the connecting pipe 503 or the connecting portion 505, a change appears in the external dimensions.

  Both the connecting pipe 503 including the handle 503 a and the connecting portion 505 connected to the cleaner body 506 are also connected to the suction hose 504. The user holds the handle 503a to operate the extension tube, and the cleaner body 506 moves to match the movement of the user. In order not to hinder the user's operation and movement, the suction hose 504 is formed to be bendable. For this reason, it is not preferable that a highly rigid member is included between the handle 503a and the cleaner body 506.

  When a charging tube that requires a certain length is disposed inside the connecting tube 503 or the connecting portion 505, the connecting tube 503 or the connecting portion 505 must also be lengthened according to the length of the charging tube. In particular, the fact that the charging tube is arranged in the connecting portion 505 and the length of the connecting portion 505 is equal to the increase in the length of the vacuum cleaner body 506. Decreases. For this reason, problems such as an increase in user stress, cleaning time, and accompanying increase in power consumption may occur. On the other hand, when the charging tube is arranged in the connecting tube 503, the length of the connecting tube 503 increases, and the flexible portion of the suction hose 504 moves from the hand to the downstream side. This reduces the operability.

  The results of the above examination are shown in Table 1. In Table 1, regarding the realization of the effect of each item, ◎ is described for a very preferable position when a charged tube is arranged, ◯ for a preferable position, Δ for a slightly unfavorable position, and × for an unsuitable position. Has been.

  Judging from all the items of pressure loss (working rate of suction), impact resistance, dust agglomeration function (product life), operability, and handling from Table 1, the charged tube is placed in the connecting tube 503. It is most preferable that it is arranged at the connecting portion 505.

  Therefore, in the first embodiment of the present invention, the charging tube is disposed inside the connecting tube 503.

  FIG. 9 is a view showing the entire charging tube according to the first embodiment of the present invention.

  As shown in FIG. 9, the charging tube 200 includes a first charging unit 201, a second charging unit 202, and an outer frame 203. FIG. 9 shows a state where the second charging unit 202 is fitted into the outer frame 203 and the first charging unit 201 is not yet fitted into the outer frame 203.

  The first charging unit 201 and the second charging unit 202 have a half pipe shape in which a cylindrical tube is divided into two in the axial direction. The outer frame 203 is formed of a cylindrical tube having an inner diameter larger than the outer diameter of the cylindrical tube formed by combining the two half pipes of the first charging unit 201 and the second charging unit 202. The first charging unit 201 is made of polypropylene, and can charge the dust sufficiently positively. The second charging unit 202 is made of polyamide and can sufficiently negatively charge the dust. The outer frame 203 is formed of an ABS resin that is excellent in workability and the like.

  A groove 203 b is formed in the outer frame 203 as a fitting portion arranged along the circumferential direction of the outer frame 203. The first charging unit 201 has protrusions (protrusions or collars) 201a and protrusions (protrusions) 201b on the end surface perpendicular to the axial direction of the half pipe, and the second charging unit 202 has an axis of the half pipe. A protrusion (convex portion or collar portion) 202a is formed on an end surface perpendicular to the direction. Further, a groove 203c for fitting the connecting tube 503 of the electric vacuum cleaner 500 and the charging tube 200 is formed on the outer periphery of the outer frame 203.

  When the first charging unit 201 is inserted into the outer frame 203, the protrusion 201a is fitted to the end surface 203a perpendicular to the axial direction of the outer frame 203, and the protrusion 201b is fitted to the groove 203b. It is attached inside. In addition, the second charging unit 202 is attached to the inner side of the outer frame 203 by inserting the second charging unit 202 into the outer frame 203 so that the protrusion 202 a fits into the end surface 203 a perpendicular to the axial direction of the outer frame 203. The second charging unit 202 is also provided with a projection corresponding to the projection 201b of the first charging unit 201. The outer frame 203 has a groove formed at a position facing the groove 203b shown in FIG. Mating. In this way, the charging ventilation member 200 is assembled.

In addition, although it was set as the structure which provided the protrusion 201b in both the 1st charging part 201 and the 2nd charging part 202, since the mechanical force of a rotation direction does not act directly on this part, the 1st charging part 201 and the 2nd A protrusion may be provided only on one of the charging units 202. Further, the first charging unit and the second charging unit may be held in the outer frame 203 by press-fitting without providing protrusions on either.

  FIG. 10 is a diagram showing a cross-section of the connecting tube in which the charging tube is arranged.

  As shown in FIG. 10, the charging tube 200 is inserted so that the downstream side is covered with one end on the upstream side of the suction hose 504, and is inserted into the connection tube 503 from the upstream end. Here, the downstream end of the charging tube 200 is held inside the connection tube 503 by a depth t from the downstream end of the connection tube 503. By doing so, even if the suction hose 504 is bent downward, the degree of bending is limited by the downstream end of the connection tube 503, and the stress applied to the charging tube 200 is greatly relieved. Therefore, it is possible to increase the inner diameter of the charging tube 200 or to make the charging tube 200 have a double structure so that the pressure loss in the charging tube 200 does not increase.

  In order to relieve the stress applied to the downstream end of the charging tube 200, it is only necessary to lengthen the depth t. Therefore, it is conceivable to lengthen the connecting tube 503. However, since the movable part behind the handle 503a is separated from the handle 503a, the operability of the electric vacuum cleaner 500 is reduced. As a result of operation with various prototypes, the present inventor, when the inner diameter of the connecting tube 503 is 58 mm, the outer diameter of the charging tube 200 is 46 mm, and the inner diameter of the charging tube 200 is 42 mm, the depth t is 19 mm. It has been found that the stress applied to the charging tube 200 can be sufficiently reduced. If the margin is reduced, the stress applied to the downstream end of the charging tube 200 is considerably relaxed even if the depth t is 12 mm.

  A groove 203c is formed along the outer periphery of the outer frame 203 of the charging tube 200, and the connection tube 503 includes a holder 513 for holding the charging tube 200 therein. The holder 513 is fixed inside the connection pipe 503. The holder 513 is formed with a protrusion (convex portion) 513a, and the protrusion 513a has a shape that fits into the groove 203c. Therefore, the charging tube 200 is connected to the suction hose 504 and is held so as not to come out of the connecting tube 503, and is rotatable in the circumferential direction.

  In addition, since the downstream end of the charging tube 200 is wrapped with the suction hose 504, the sealing performance is high, and the first charging unit 201, the second charging unit 202, and the outer frame 203 are not required to have a highly adhesive structure. Does not leak and does not require ultrasonic welding or screwing. For this reason, the profit rate can be improved by shortening the manufacturing time of the charging tube 200, improving the manufacturing efficiency, and reducing the manufacturing cost.

  When the electric blower 567 is driven, a suction airflow is generated by the fan 568, and air containing dust flows into the cleaner body 506 from the suction hose 504 and the connecting portion 505, and the connecting portion 562, the dust collecting filter 564, and the connecting portion. 565, the fan 568, the electric motor main body 569, the HEPA filter 570, and the exhaust port 571 are blown. At this time, dust contained in the intake air is charged and aggregated when passing through the charging tube 200 disposed inside the connection tube 503. Since air containing fine dust and dust mass is conveyed while being mixed while being conveyed, contact, suction and adsorption are performed, and the dust mass according to the present invention grows larger.

  Largely grown dust particles are larger than the size of the eyes of the dust collection filter 564, and are thus collected by the dust collection filter 564. If a plurality of charging parts are provided, or if a structure that can increase the contact between fine dust and the charging part is taken, the dust collection lump will be larger than the size of the eyes of the dust collection filter 564, so that the HEPA filter 570 is not required. Can do.

  Here, if the dust mass does not grow larger than the size of the eyes of the dust collection filter 564, it may pass through the filter 564. In such a case, a HEPA filter 570 may be provided for collection.

  Thus, the vacuum cleaner 500 includes a suction port 501 having an intake port, an electric blower 567 for generating intake air, a cleaner body 506 having the electric blower 567 inside, a suction port 501 and a cleaner body 506. A charging pipe 200 having a first charging unit 201 that positively charges dust contained in the intake air and a second charging unit 202 that negatively charges dust contained in the intake air. The intake pipe has an extension pipe narrow side 511 connected to the suction port 501, and a part of the extension pipe narrow side 511 is inserted into the extension pipe narrow side 511 on the downstream side of the extension pipe narrow side 511 with respect to the intake air. A connection pipe 503 connected to the extension pipe thick side 512 downstream of the extension pipe thick side 512 with respect to the intake air, and a connection pipe 503 connected downstream of the connection pipe 503 with respect to the intake air. Connect to tube 503 A suction hose 504, and a connecting portion 505 for connecting the suction hose 504 and the cleaner body 506 downstream of the suction hose 504 with respect to the intake air, and the extension tube narrow side 511 has rigidity. The extension pipe thick side 512 has rigidity and a relatively large diameter, and the connection pipe 503 has rigidity and a relatively large diameter, and a handle 503a for the user to hold. The suction hose 504 is flexible and has a relatively large diameter, and the connecting portion 505 is a vacuum cleaner 500 that is rigid and has a relatively large diameter. Arranged inside the tube 503.

  The longer the length of the charging tube 200 in the intake direction, the higher the dust aggregation effect. On the other hand, when the vacuum cleaner 500 includes the charging tube 200, the charging tube 200 must be disposed at a position where the intake air passes, but depending on the disposed position, the length of the charging tube 200 is limited, The operability of the vacuum cleaner 500 may deteriorate.

  Thus, by providing the charging tube 200 inside the connecting tube 503, a vacuum cleaner 500 that has a simple structure and can charge and aggregate dust without reducing the suction flow rate. be able to.

  In the vacuum cleaner 500, the suction hose 504 is partially inserted into the connection pipe 503 and connected to the connection pipe 503, and the charging pipe 200 is at least partially inserted into the suction hose 504. Therefore, the downstream end of the charging tube 200 that is disposed inside the connection pipe 503 and is located on the downstream side of the intake air is located upstream of the downstream end of the connection pipe 503 that is located on the downstream side of the intake air.

  By doing so, even if the suction hose 504 having flexibility is bent, the bending degree is limited by the connecting tube 503 having rigidity, and the stress applied to the charging tube 200 inserted into the suction hose 504 is reduced. It is greatly eased. Therefore, it is possible to increase the inner diameter of the charging tube 200 or to make the charging tube 200 have a double structure so that the pressure loss in the charging tube 200 does not increase.

  Further, by doing so, the downstream end of the charging tube 200 is wrapped in the suction hose 504 so as to have a highly airtight structure. Therefore, ultrasonic welding or screwing is not performed on the components constituting the charging tube 200. Even air does not leak. For this reason, the profit rate can be improved by shortening the manufacturing time of the charging tube 200, improving the manufacturing efficiency, and reducing the manufacturing cost.

  Further, in the vacuum cleaner 500, the charging tube 200 is held so as to be rotatable around this axis with the direction of intake air flowing as an axis.

  If the charging tube 200 is held so that the positions of the connecting tube 503 and the charging tube 200 are fixed to each other so that the charging tube does not rotate inside the connecting tube 503, a torsional force acts during handling during cleaning, It is difficult for the user to work.

  Thus, by doing this, the operability of the vacuum cleaner 500 is improved, and the user can operate without being stressed, so that the cleaning time, power consumption, and the like can be increased. . In addition, since the force due to the rotation of the flexible suction hose 504 is less likely to be applied to the charging tube 200, the charging tube 200 can be prevented from being deformed or damaged. Can be achieved.

(Second Embodiment)
In the second embodiment of the present invention, although not shown, the charging tube 200 is inserted into one end of the suction hose 504 on the downstream side. Other configurations are the same as those of the vacuum cleaner 500 of the first embodiment.

  Thus, the vacuum cleaner 500 includes a suction port 501 having an intake port, an electric blower 567 for generating intake air, a cleaner body 506 having the electric blower 567 inside, a suction port 501 and a cleaner body 506. A charging pipe 200 having a first charging unit 201 that positively charges dust contained in the intake air and a second charging unit 202 that negatively charges dust contained in the intake air. The intake pipe has an extension pipe narrow side 511 connected to the suction port 501, and a part of the extension pipe narrow side 511 is inserted into the extension pipe narrow side 511 on the downstream side of the extension pipe narrow side 511 with respect to the intake air. A connection pipe 503 connected to the extension pipe thick side 512 downstream of the extension pipe thick side 512 with respect to the intake air, and a connection pipe 503 connected downstream of the connection pipe 503 with respect to the intake air. Connect to tube 503 A suction hose 504, and a connecting portion 505 for connecting the suction hose 504 and the cleaner body 506 downstream of the suction hose 504 with respect to the intake air, and the extension tube narrow side 511 has rigidity. The extension pipe thick side 512 has rigidity and a relatively large diameter, and the connection pipe 503 has rigidity and a relatively large diameter, and a handle 503a for the user to hold. The suction hose 504 is flexible and has a relatively large diameter, and the connecting portion 505 is a vacuum cleaner 500 that is rigid and has a relatively large diameter. Arranged inside the portion 505.

  The longer the length of the charging tube 200 in the intake direction, the higher the dust aggregation effect. On the other hand, when the vacuum cleaner 500 includes the charging tube 200, the charging tube 200 must be disposed at a position where the intake air passes, but depending on the disposed position, the length of the charging tube 200 is limited, The operability of the vacuum cleaner 500 may deteriorate.

  Thus, by providing the charging tube 200 inside the connecting portion 505, a vacuum cleaner 500 that has a simple structure and can charge and aggregate dust without reducing the suction flow rate. be able to.

  Further, in the electric vacuum cleaner 500, the charging tube 200 is held so as to be rotatable around this axis with the direction of intake air flowing as an axis.

  When the charging tube 200 is held so that the positions of the connecting portion 505 and the charging tube 200 are fixed to each other so that the charging tube does not rotate inside the connecting portion 505, a twisting force acts during handling during cleaning, It is difficult for the user to work.

  Thus, by doing this, the operability of the vacuum cleaner 500 is improved, and the user can operate without being stressed, so that the cleaning time, power consumption, and the like can be increased. . In addition, since the force due to the rotation of the flexible suction hose 504 is less likely to be applied to the charging tube 200, the charging tube 200 can be prevented from being deformed or damaged. Can be achieved.

  The embodiment disclosed above should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above embodiments but by the scope of claims, and includes all modifications and variations within the meaning and scope equivalent to the scope of claims.

FIG. 2 is a diagram illustrating the configuration of first and second charging portions of a charging tube as one embodiment of the present invention. FIG. 3 is a diagram illustrating assembly of first and second charging portions of a charging tube as one embodiment of the present invention. It is sectional drawing which looked at the charging tube shown in FIG. 2 from the direction of the AA 'line. It is a figure which shows the model in the other case where a dust lump is formed by this invention. FIG. 3 is an explanatory view of the structure of the charging tube of the present invention when a raised portion is provided on the inner surface as one embodiment of the present invention. It is a figure explaining the detailed shape of the protruding part of FIG. It is a figure showing the whole vacuum cleaner of the present invention as a 1st embodiment of the present invention. It is explanatory drawing of a structure of the main body of the vacuum cleaner of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the whole charging tube concerning 1st Embodiment of this invention. It is a figure which shows the cross section of the connection pipe | tube with which the charging tube is arrange | positioned.

Explanation of symbols

10: first charging unit, 11: second charging unit, 12: charging tube, 200: charging tube, 201: first charging unit, 202: second charging unit, 500: vacuum cleaner, 501: suction port, 503 : Connection pipe, 503a: Handle, 504: Suction hose, 505: Connection part, 506: Vacuum cleaner main body, 511: Extension pipe narrow side, 512: Extension pipe thick side, 567: Electric blower.

Claims (3)

A suction port body having an intake port;
An electric blower that generates intake air;
A main body having the electric blower inside;
An intake pipe communicating between the suction port body and the main body;
A charging tube having a first charging portion that positively charges dust contained in the intake air and a second charging portion that negatively charges dust contained in the intake air;
The intake pipe includes a first intake pipe connected to the intake port body, and a part of the first intake pipe is inserted into the first intake pipe on the downstream side of the first intake pipe with respect to the intake air. A second intake pipe connected to the pipe, a first connection pipe connected to the second intake pipe downstream of the second intake pipe with respect to the intake air, and the first connection pipe connected to the intake air A second intake pipe connected to the first connection pipe on the downstream side of the second intake pipe, and a second intake pipe for connecting the third intake pipe and the main body on the downstream side of the third intake pipe with respect to the intake air A connecting pipe,
The first intake pipe has rigidity and a relatively small diameter, the second intake pipe has rigidity and a relatively large diameter, and the first connection pipe has rigidity and a relative diameter. The third intake pipe is flexible and has a relatively large diameter, and the second connection pipe is rigid and has a relative diameter. A vacuum cleaner with a large diameter,
The charging pipe is disposed inside the first connecting pipe or the second connecting pipe , and a downstream end or an upstream end of the charging pipe is inserted into the third intake pipe that is, vacuum cleaner. A suction port body having an intake port;
An electric blower that generates intake air;
A main body having the electric blower inside;
An intake pipe communicating between the suction port body and the main body;
A charging tube having a first charging portion that positively charges dust contained in the intake air and a second charging portion that negatively charges dust contained in the intake air;
The intake pipe includes a first intake pipe connected to the intake port body, and a part of the first intake pipe is inserted into the first intake pipe on the downstream side of the first intake pipe with respect to the intake air. A second intake pipe connected to the pipe, a first connection pipe connected to the second intake pipe downstream of the second intake pipe with respect to the intake air, and the first connection pipe connected to the intake air A second intake pipe connected to the first connection pipe on the downstream side of the second intake pipe, and a second intake pipe for connecting the third intake pipe and the main body on the downstream side of the third intake pipe with respect to the intake air A connecting pipe,
The first intake pipe has rigidity and a relatively small diameter, the second intake pipe has rigidity and a relatively large diameter, and the first connection pipe has rigidity and a relative diameter. The third intake pipe is flexible and has a relatively large diameter, and the second connection pipe is rigid and has a relative diameter. A vacuum cleaner with a large diameter,
The charging tube is disposed inside the first connection tube or the second connection tube,
The third intake pipe is partially inserted into the first connection pipe and connected to the first connection pipe, and the charging pipe is at least partially inserted into the third intake pipe. The downstream end of the charging tube located inside the first connecting pipe and located downstream of the intake air is more influential than the downstream end of the first connecting pipe located downstream of the intake air. located on the upstream side, electric vacuum cleaner. A suction port body having an intake port;
An electric blower that generates intake air;
A main body having the electric blower inside;
An intake pipe communicating between the suction port body and the main body;
A charging tube having a first charging portion that positively charges dust contained in the intake air and a second charging portion that negatively charges dust contained in the intake air;
The intake pipe includes a first intake pipe connected to the intake port body, and a part of the first intake pipe is inserted into the first intake pipe on the downstream side of the first intake pipe with respect to the intake air. A second intake pipe connected to the pipe, a first connection pipe connected to the second intake pipe downstream of the second intake pipe with respect to the intake air, and the first connection pipe connected to the intake air A second intake pipe connected to the first connection pipe on the downstream side of the second intake pipe, and a second intake pipe for connecting the third intake pipe and the main body on the downstream side of the third intake pipe with respect to the intake air A connecting pipe,
The first intake pipe has rigidity and a relatively small diameter, the second intake pipe has rigidity and a relatively large diameter, and the first connection pipe has rigidity and a relative diameter. The third intake pipe is flexible and has a relatively large diameter, and the second connection pipe is rigid and has a relative diameter. A vacuum cleaner with a large diameter,
The charging tube is disposed inside the first connection tube or the second connection tube,
The charging tubes are held so as to be rotatable about this axis as an axis the direction of flow of the intake air, electric vacuum cleaners.

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