JP4283290B2 - Electric vacuum cleaner - Google Patents

Description

  The present invention relates to a vacuum cleaner provided with dust removing means for a pleated filter.

In this type of vacuum cleaner, due to the suction negative pressure generated by the electric blower, the air sucked into the suction air passage passes through the main dust separation / collection means and the pleated filter in this order and flows to the suction opening of the electric blower. In addition, by hitting the downstream side of the pleat filter with a hitting member or the like interlocking with the cord reel, the fine dust adhering to the upstream surface of the pleat filter is knocked down and collected in the lower fine dust collecting chamber. What is made to gather is known (for example, refer patent document 1).
JP 2004-216209 A

  However, conventionally, there has been a problem that fine dust collected in the fine dust collecting chamber adheres to the pleated filter during the next operation of the electric blower.

  In order to solve this, at the time of dust removal of the pleated filter, air is not sucked into the main dust separating / collecting means from the suction port body, and air is prevented from flowing to the electric blower through the pleated filter. It is considered that outside air is sucked into the upstream side of the pleated filter as cleaning air, and fine dust struck from the pleated filter is returned to the main dust separating / collecting means by the flow of the cleaning air sucked in.

  In this case, in order to form the flow of the cleaning air, it is necessary to provide a bypass air path from the main dust separation / collection means to the suction opening of the electric blower. Moreover, it is necessary to provide a bypass filter in the bypass air passage.

  However, when the bypass filter is clogged, the flow of cleaning air does not occur, so it is necessary to know whether or not the bypass filter is clogged.

  Then, this invention aims at providing the vacuum cleaner which can know easily whether the bypass filter is clogged.

  In order to achieve this object, the vacuum cleaner of the present invention is attached to the pleat filter, a suction main air passage through which air passes through the main dust separating / collecting means and the pleat filter in this order and flows to the suction opening of the electric blower. The dust removal means for dropping the fine dust, the fine dust return air path for returning the fine dust removed by the dust removal means to the main dust separation / collection means together with the air, and the air disposed in parallel with the suction main air path. A bypass air passage that flows from the main dust separation / collection means to the suction opening via a bypass filter and a cleaning air introduction air passage that introduces air as cleaning air immediately upstream of the pleated filter are provided.

  In addition, the vacuum cleaner includes a first on-off valve that opens and closes a suction air passage to the main dust separation and collection means, a second on-off valve that opens and closes the fine dust return air passage, and the main dust A third on-off valve that opens and closes a suction air path between the separating / collecting means and the pleat filter; a fourth on-off valve that opens and closes a suction flow air path between the pleat filter and the suction opening; A fifth on-off valve for opening and closing the bypass air passage; and a sixth on-off valve for opening and closing the washing air introduction air passage.

  In addition, at the time of cleaning, the suction air passages are opened by the first, third, and fourth on-off valves, respectively, and the fine dust return air passage, the bypass air passage, and the second, fifth, and sixth on-off valves, and While the cleaning air introduction air passages are closed, the suction air passages are closed by the first, third, and fourth on-off valves and the second, fifth, and sixth on-off valves at the time of dust removal of the pleated filter. The fine dust return air passage, the bypass air passage, and the cleaning air introduction air passage are each opened.

  Further, clogging detection means for detecting a clogged state of the bypass filter and inputting a detection signal to the control means before starting dust removal of the pleated filter is provided, and the control means is supplied from the clogging detection means. When the detection signal exceeds a predetermined value, a notification to that effect is given through the notification means.

  According to this configuration, it is possible to easily know whether or not the bypass filter is clogged.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  The vacuum cleaner 10 shown in FIG. 1 has a vacuum cleaner main body 11 and a dust collecting hose 12 having one end detachably connected to a connection port 11A of the vacuum cleaner main body 11 and a hand operation tube 13 provided at the other end. And an extension pipe 14 that is detachably connected to the hand operation pipe 13 and a suction port body 15 that is detachably connected to the distal end portion of the extension pipe 14. The operation section 13A is provided on the hand operation tube 13, and the operation section 13A is provided with a switch 13a for stopping the driving of the electric blower 24, a strength switch 13b for setting the power of the electric blower 24, and the like. .

  The suction port body 15 is formed with a suction chamber (not shown) in which a suction opening (dust suction port) (not shown) for sucking dust is formed on the bottom surface, and the suction chamber includes an extension pipe 14 and a dust collecting hose. 12 and the connection port 11A communicate with the suction connection port 57A of the dust collection unit 50 (see FIG. 10) provided in the cleaner body 11.

  The cleaner body 11 includes a main body case 20, a dust collection unit 50 (see FIG. 2) mounted in the main body case 20, and an electric blower 24.

  As shown in FIGS. 2 to 4, a dust collection unit chamber 22 having an upper opening 22 </ b> A is formed on the front side of the main body case 20, and a lid case 500 (see FIG. 1) can be opened and closed at the upper portion of the main body case 20. It is attached. The lid case 500 covers the entire upper portion of the main body case 20 together with the dust collection unit chamber (storage chamber) 22. The main body case 20 is not sealed by the lid case 500.

  In the dust collection unit chamber 22, a pop-up mechanism 1000 (see FIG. 7) for popping up a dust collection container 410 (FIG. 11) described later is provided.

  Further, as shown in FIG. 1, a pair of legs 501 extending obliquely downward is formed at the lower part of both side parts of the lid case 500, and the lower part 501A of the legs 501 is a cylindrical axle 17 ( 5 (see FIG. 5), and the rear wheel 16 attached to the cylindrical axle 17 is covered. As shown in FIG. 5, a torsion coil spring 18 is mounted in the cylindrical axle 17, one end of the torsion coil spring 18 is fixed to the cylindrical axle 17, and the other end 18A of the torsion coil spring 18 is a leg 501 (see FIG. 1). The torsion coil spring 18 urges the lid case 500 clockwise about the cylindrical axle 17 in FIG.

  Actually, a rotating body 900 (see FIG. 2) is rotatably mounted on the cylindrical axle 17, and the other end 18A of the torsion coil spring 18 is locked to the protrusion 902 (see FIG. 14) of the arm portion 901 of the rotating body 900. The arm portion 901 is locked in the leg portion 501 of the lid case 500, and the lid case 500 is urged clockwise.

  Then, the lid case 500 is rotated clockwise about the cylindrical axle 17 so that the lid case 500 is opened as indicated by the chain line in FIG.

  As shown in FIGS. 6 and 7, a substantially inverted L-shaped engaging member 510 is provided on the front side of the lid case 500.

  A cylindrical connection air passage portion (connection air passage) 25 (see FIG. 27) having a front opening 25B (see FIG. 14) is formed on the front side (left side in FIG. 1) of the electric blower 24 of the main body case 20. The connection air passage portion 25 communicates with the suction opening 24 </ b> A of the electric blower 24.

  As shown in FIG. 14, a rotatable lattice member 600 is provided in the front opening 25B of the connection air passage portion 25, and the lattice member 600 is rotated by a motor M1 (see FIG. 37).

  As shown in FIG. 27, a suction pipe 27 communicating with the suction opening 24 </ b> A of the electric blower 24 is provided in the connection air passage section 25, and an opening (suction air path) is provided at the tip of the suction pipe 27. A fourth on-off valve 28 for opening and closing 27A is provided. The opening / closing operation of the fourth opening / closing valve 28 is performed by a motor M2 (see FIG. 37).

  As shown in FIG. 14, the lattice member 600 is provided with a plurality of protrusions 601 that engage with valleys of a pleat filter (second dust separating means) 104 (see FIG. 13) described later. The pleated filter body 100, which will be described later, is rotated. By rotating the pleated filter body 100, dust removing means 2100 of a dust removing mechanism 2000 (see FIG. 31) described later removes fine dust attached to the pleated filter 104.

  A clamp 700 that locks the closed lid case 500 is provided on the connection port 11 </ b> A of the main body case 20.

  As shown in FIGS. 7 and 8, the clamp 700 has an operation portion 701 whose upper surface is formed in a curved surface, and the rear surface 701A of the operation portion 701 is provided on both sides at the rear (right side in FIGS. 6 and 7). The support plate portions 702 and 702 projecting to) are formed, and shaft portions 703 and 703 are formed on the outer surface of the support plate portion.

  The shaft portions 703 and 703 are rotatably held by bearing portions 27 and 27 provided in the main body case 20 as shown in FIG. The clamp 700 is urged clockwise around a shaft portion 703 in FIG. 7 by a spring (not shown). The clamp 700 is prevented from rotating clockwise from the position shown in FIG. 7 by a regulating member (not shown).

  When the operation portion 701 is pushed downward from above, the clamp 700 rotates counterclockwise around the shaft portions 703 and 703 from the position shown in FIG. 7 against the biasing force of a spring (not shown). It is like that.

  A front wall portion 704 extending downward is formed at the front end of the operation portion 701, and a pressing portion 705 extending rearward is formed below the front wall portion 704. A support portion 706 extending upward is formed at the rear portion of the pressing portion 705, and a locking claw 707 is formed above the support portion 706.

  As shown in FIGS. 6 and 7, the latching claw 707 is engaged with the tip 511 of the engaging member 510 of the lid case 500 to lock the lid case 500 to the main body case 20.

  When the clamp 700 is rotated clockwise, as shown in FIG. 9, the locking claw 707 of the clamp 700 is disengaged from the distal end portion 511 of the engaging member 510 of the lid case 500, and the lock of the lid case 500 is released. The

  As shown in FIG. 10, the dust collection unit 50 includes a dust separation unit 400 and a dust collection container 410 that is detachably attached to the dust separation unit 400.

  The dust separation unit 400 includes a dust separation unit (first dust separation unit) 52 and a filter unit 80 integrated with the dust separation unit 52. The dust separating unit 52 and the dust collecting container 410 constitute main dust separating / collecting means.

  As shown in FIGS. 10 and 12, the dust separator 52 includes a separation chamber portion (upstream air passage) 54 formed in a cylindrical shape by the outer peripheral wall 53, and the axis of the separation chamber portion 54 in the separation chamber portion 54. A substantially conical dust separating means 55 provided along the suction side, a suction air passage portion (guide air passage) 56 provided outside the right side wall 54A of the separation chamber portion 54, and a suction connection port (dust as a suction air passage). And a guide air passage body 57 that guides air from the suction inlet 57 </ b> A to the separation chamber portion 54. The suction connection port 57A communicates with the connection port 11A of the cleaner body 11 when the dust separation unit 400 is mounted in the dust collection unit chamber 22 of the cleaner body 11. The suction air passage portion 56 is provided below the guide air passage body 57.

  As shown in FIG. 12, an introduction opening 53 </ b> A for introducing dust separated from air into the dust collecting container 410 is formed in the upper portion of the outer peripheral wall 53 of the separation chamber portion 54. Further, as shown in FIG. 23, a return opening 53D is formed on the lower side of the outer peripheral wall 53 forming an arc surface. The return opening 53D is provided with a second on-off valve K2 that can be opened and closed. As shown in FIGS. 24 and 25, one end of a return air duct 2510 is connected to the return opening 53D. The return air passage tube 2510 forms a return air passage (fine dust return air passage) 2511 (see FIGS. 21 and 22).

  A shaft portion KJ1 is formed at one end of the second on-off valve K2, and as shown in FIG. 24, the shaft portion KJ1 is pivotally supported upstream of the separation chamber portion 54, and the other end of the second on-off valve K2 is It is located downstream of the separation chamber 54. As shown in FIG. 25, the second on-off valve K2 is opened by rotating counterclockwise about the shaft portion KJ1.

  The second on-off valve K2 is closed by air introduced into the separation chamber 54 from a connection opening 54Aa, which will be described later, and opened by air returned from the return air duct 2510 into the separation chamber 54. ing.

  As shown in FIG. 23, a connection opening 54Aa communicating with the separation chamber portion 54 is formed in the guide air passage body 57, and the first opening / closing valve K1 is provided in the connection opening 54Aa so as to be openable and closable. When the first on-off valve K1 is switched to the solid line position, the connection opening 54Aa is closed, and when the first opening / closing valve K1 is switched to the chain line position, the connection opening 54Aa is opened. The air introduced from the guide air passage body 57 into the separation chamber portion 54 through the connection opening 54Aa is rotated counterclockwise in FIG.

  Further, a circular opening 154A (see FIG. 10) and a fan-shaped opening 154B (see FIGS. 12 and 24) are formed in the right side wall 54A of the separation chamber portion 54, and a dust separating means 55 is attached to the opening 154A. A net filter NF2 (see FIG. 24) is attached to the opening 154B.

  The dust separating means 55 includes a plurality of frames 55a and a net filter NF1 attached around the frame 55a. The suction air passage portion 56 communicates with the inside of the separation chamber portion 54 through the opening 154A (see FIG. 10) of the right side wall 54A and the net filter NF1 (see FIG. 12), and the net of the opening 154B of the right side wall 54A. The separation chamber 54 communicates with the filter NF2 (not shown).

  As shown in FIG. 12, an opening 56D is formed at the bottom of the suction air passage portion 56, and a filter (pleat filter) PF is attached to the opening 56D as a bypass filter. Further, one end of a bypass air passage tube 2501 that forms a bypass air passage 2500 (see FIG. 21) is connected to the opening 56D as shown in FIG.

  The other end of the bypass air passage tube 2501 is connected to the suction tube 27 as shown in FIG. 27, and the suction air passage portion 56 and the suction tube 27 communicate with each other through the bypass air passage tube 2501. The bypass air duct 2501 is provided with a fifth on-off valve (solenoid valve) 2502.

   The suction air passage portion 56 communicates with a storage case (second dust separation case) 81 of the filter portion 80 to be described later, and via a connection opening 56A formed in the right side wall portion 156 (see FIG. 12). It communicates with a dust collection chamber 73 of a dust collection case portion 74 to be described later.

  As shown in FIGS. 11 and 12, the dust collecting container 410 has a communication case portion 72 in which a communication passage 71 extending in the left-right direction is formed in the upper portion, and a lower side from the right end portion (in FIG. 12) of the communication case portion 72. And a dust collection case 74 having a dust collection chamber 73 for collecting dust.

  As shown in FIG. 11, an opening 72 </ b> A that communicates with the communication path 71 (see FIG. 12), a hook 72 </ b> F, and a recess 73 are formed on the lower surface of the communication case portion 72. A rib 72 </ b> R extending in the vertical direction is formed in the recess 73. The opening 72A is connected to the introduction opening 53A of the dust separator 52 as shown in FIG.

  Further, a connection opening 75 is formed in the left side wall portion 74 </ b> A of the dust collection case portion 74, and a net filter NF <b> 3 is attached to the connection opening 75. A dust collection chamber 74B is formed as a dust collection portion between the recess 73 and the net filter NF3.

  The dust collection case 74 has a lid 74A that can be opened and closed. As shown in FIG. 11, a rib 74R extending downward is formed at the bottom of the lid 74A. The lid 74A is rotatable about the axis 74J, and is opened and closed by this rotation.

  When the dust collecting container 410 is attached to the dust separating unit 400, as shown in FIG. 12, the introduction opening 53A of the dust separating unit 52 is connected to the opening 72A of the dust collecting container 410, and the connection opening 75 of the dust collecting container 410 is connected. Is connected to the connection opening 56A of the suction air passage portion 56 of the dust separation unit 400.

 As shown in FIG. 13, the filter unit 80 includes a cylindrical storage case 81 whose rear surface is opened and a pleated filter body (secondary filter) 100 that is rotatably mounted in the storage case 81. ing. A dust separation portion 52 (see FIG. 10) is integrally formed on the front surface of the front wall portion 84 of the storage case 81.

  As shown in FIGS. 12 and 13, a connection opening 84 </ b> A is formed in the front wall portion 84 of the storage case 81, and the connection opening 84 </ b> A is connected to the suction air passage portion 56. The inside of the storage case 81 and the suction air passage portion 56 communicate with each other through the connection opening 84A.

  29, an outside air introduction port (cleaning air introduction air passage) 84F for introducing outside air into the storage case 81 is formed in the upper portion of the front wall portion 84, and the front surface of the front wall portion 84 is shown in FIG. As shown, a sixth on-off valve K6 that opens and closes the outside air inlet 84F is provided. The sixth on-off valve K6 is biased by the elastic member 86 in the direction of closing the outside air introduction port 84F.

  The sixth on-off valve K6 is provided with a contact piece 87 shown in FIG. 29, and this contact piece 87 projects into the storage case 81 from the outside air introduction port 84F. The contact piece 87 is formed with an inclined surface 87a that increases in the amount of protrusion into the storage case 81 as it goes to the right (in FIG. 29). When the abutting piece 87 is pressed against the urging force of the elastic member 86, the sixth on-off valve K6 is opened, and the outside air is introduced into the storage case 81 from the outside air introduction port 84F.

  As shown in FIG. 28, a bottom opening 82A is formed at the bottom of the peripheral wall portion 82 of the storage case 81, and the other end of the return air duct 2510 is connected to the bottom opening 82A. By this return air duct 2510, the inside of the storage case 81 on the upstream side of the pleated filter body 100, which will be described later, and the inside of the separation chamber 54 of the dust separator 52 are communicated (see FIG. 21).

  As shown in FIG. 13, the pleated filter body 100 includes a pleated filter 104 in which pleats are radially formed from a shaft portion 101 </ b> A provided at the center position of the storage case 81. The shaft portion 101A is rotatably mounted on a shaft 2001 (see FIG. 31) described later.

  When the dust collection unit 50 is mounted in the dust collection unit chamber 22 of the main body case 20, the rear opening 81 </ b> B of the storage case 81 is joined to the front opening 25 </ b> B (see FIG. 14) of the connection air passage portion 25 of the main body case 20. .

  As shown in FIG. 7, the pop-up mechanism 1000 includes a pair of pop-up means 1100, 1110 (see FIG. 3) for popping up the dust collecting container 410 (lifting the dust collecting container 410 upward by a spring), and the dust collecting container 410. Is provided with a lock means 1200 for fixing the dust separation unit 400 to the mounting position, and a release means 1300 for releasing the lock of the lock means 1200.

  The pop-up means 1100 is provided on the upper surface of the outer peripheral wall 53 of the dust separation unit 52 of the dust separation unit 400, extends upward, and has a rectangular cylindrical cross-section guide case 1101, and a spring disposed in the guide case 1101. 1102 (omitted in FIG. 3). The guide case 1101 is formed with a pair of slits 1103 (see FIG. 3) extending in the vertical direction.

  Similarly, the pop-up means 1110 includes a cylindrical guide case 1111 (see FIG. 3) provided in the dust collection unit chamber 22 and a spring 1112 disposed in the guide case 1111. The guide case 1111 has a pair of slits 1113 (see FIG. 3) extending in the vertical direction.

  When the dust collection container 410 is mounted on the dust separation unit 400, the ribs 72R and 74R (see FIG. 11) of the dust collection container 410 enter the slits 1103 and 1113 of the guide cases 1101 and 1111 and springs 1102 and 1112 (FIG. 7). ) Is compressed against the biasing force. The dust collecting container 410 is urged upward by the urging force of the springs 1102 and 1112.

  The locking means 1200 is provided on the upper portion of the guide air passage body 57 so as to be movable in the front-rear direction (left-right direction in FIG. 7) and extends in the front-rear direction, and guides the slide member 1201 in the front-rear direction. A covered guide cover 1202 (see FIG. 4) and a spring (not shown) for urging the slide member 1201 leftward (in FIG. 7) are provided.

  On the rear side of the slide member 1201, a cylindrical portion 1203 having a rectangular cross section protruding upward is formed, and the cylindrical portion 1203 protrudes from an opening 1202A (see FIG. 3) of the guide cover 1202. The length in the front-rear direction of the cylindrical portion 1203 is set to be shorter than the width in the front-rear direction of the opening 1202A, so that the movement of the slide member 1201 in the front-rear direction is not hindered.

  An opening 1204 is formed on the upper surface of the cylindrical portion 1203. When the dust collecting container 410 is attached to the dust separation unit 400, the hook 72F of the dust collecting container 410 enters the opening 1204 and its edge (fixing means) 1204a. The dust collecting container 410 is locked at the position (mounting position) shown in FIG. 7 by this engagement.

  The release means 1300 includes a slide member 1201 and a pressing portion 705 of the clamp 700 that moves the slide member 1201 to the right (in FIG. 7). Then, when the operation portion 701 is pushed from above and the clamp 700 is rotated as shown in FIG. 9, the pressing portion 705 of the clamp 700 is brought into contact with the distal end portion 1201a of the slide member 1201 against a biasing force of a spring (not shown). The slide member 1201 is moved to the right in contact. By this movement, the hook 72F of the dust collecting container 410 is released from the edge 1204a of the opening 1204 of the cylindrical portion 1203 of the slide member 1201, and the dust collecting container 410 is unlocked.

  As shown in FIGS. 31 and 32, the dust removal mechanism 2000 includes a shaft 2001 that is rotatably provided at the center of the storage case 81, an arm 2002 that is attached to the shaft 2001 and extends upward, And dust removing means 2100 provided on the upper part (tip part) of 2002. A third on-off valve K3 is integrally provided at the lower part of the arm 2002. The third on-off valve K3 rotates integrally with the arm 2002 and the shaft 2001 and is rotated to the position shown in FIG. The connection opening (suction air passage) 84A of the storage case 81 is closed.

  Further, when the arm 2002 and the third on-off valve K3 are rotated counterclockwise to the chain line position, the connection opening 84A of the storage case 81 is opened.

  When the arm 2002 is positioned at the position shown in FIG. 31, the shaft portion 2011 at the tip of the arm 2002 comes into contact with the inclined surface 87a of the contact piece 87 of the sixth on-off valve K6 as shown in FIG. The sixth on-off valve K6 is pressed against the urging force of the elastic member 86, and the sixth on-off valve K6 is opened as shown in FIG.

  As shown in FIGS. 32, 35, and 36, the dust removing means 2100 includes a shaft portion 2101 that is rotatably provided at the shaft center portion 2002A of the tip of the arm 2002, and a pair that protrudes outward from the shaft portion 2101. The support portion 2102, a roller 2103 rotatably provided at the distal end portion of the support portion 2102, and a protrusion 2104 that protrudes outward from the shaft portion 2101. The pair of support portions 2102 are disposed at a predetermined angle, and the protrusion 2104 is disposed on a line that bisects the predetermined angle and is opposite to the support portion 2102.

  As shown in FIG. 18, the roller 2103 contacts the bottom surface 84 Ma of the groove 84 </ b> M of the front wall portion 84 of the storage case 81, and the protrusion 2104 contacts the peak portion of the pleated filter 104. The groove 84M is formed in an arc shape as shown in FIGS. 29 and 31, and the rotation of the arm 2002 is restricted at both ends of the groove 84M. The arm 2002 is within the range of the groove 84M, that is, the solid line position shown in FIG. And can be rotated within the range of the chain line position.

  The protrusion 2104 can rotate in the left-right direction (in FIG. 35) about the shaft center 2002A together with the shaft portion 2101, and the protrusion 2104 is formed by the biasing force of the spring BN (see FIG. 18). It returns to the original position shown at 35.

  As the pleated filter 104 rotates, the protrusion 2104 that contacts the peak portion of the pleated filter 104 rotates about the shaft center 2002A together with the shaft portion 2101. When the pleat filter 104 is rotated by a predetermined angle, the protrusion 2104 moves over the peak portion of the pleat filter 104 and returns to the original position by the biasing force of the spring. At this time, the protrusion 2104 hits the peak of the next pleat filter 104, thereby vibrating the pleat filter 104 and dropping fine dust adhering to the pleat filter 104.

  As shown in FIG. 18, the shaft 2001 provided in the storage case 81 passes through the front wall portion 84 and protrudes forward, and an opening / closing mechanism 2200 for opening and closing the first opening / closing valve K1 is provided at the tip of the shaft 2001. The gear 2201 is provided.

  As shown in FIGS. 19 and 20, the opening / closing mechanism 2200 includes a rack 2202 meshed with the gear 2201, a slide plate 2203 having the rack 2202 and movable in the left-right direction, and one end of the slide plate 2203 (FIG. 19). And a support portion 2204 having a pin 2205 at the tip and an arm 2208 having a long hole 2206 with which the pin 2205 is engaged and extending from the shaft 2207 of the first on-off valve K1. is doing.

  A long hole 2203 A is formed in the slide plate 2203, and a shaft 2001 is inserted into the long hole 2203, and the shaft 2001 moves relative to the long hole 2203 to move the slide plate 2203 in the horizontal direction. It does not cause any trouble.

  Further, the pin 2205 engaged with the long hole 2206 of the arm 2208 is relatively movable along the long hole 2206. Therefore, the arm 2208 rotates together with the shaft 2207 when the slide plate 2203 moves in the left-right direction, and the first on-off valve K1 is opened by the rotation of the shaft 2207.

  For example, when the slide plate 2203 is located at the position shown in FIGS. 19 and 20, the first on-off valve K1 closes the connection opening 54Aa of the guide air passage body 57 as shown in FIG. At this time, the sixth on-off valve K6 is opened as shown in FIG. 33, and the third on-off valve K3 closes the connection opening 84A of the storage case 81 as shown in FIG.

  When the slide plate 2203 moves to the right from the position shown in FIGS. 19 and 20, the first on-off valve K1 moves to the chain line position shown in FIG. 23, the connection opening 54Aa is opened, and the sixth on-off valve K6 is 19 and 20, the third on-off valve K3 moves to the position indicated by the chain line in FIG. 31 to open the connection opening 84A of the storage case 81.

  FIG. 37 is a block diagram showing the configuration of the control system of the vacuum cleaner. In FIG. 37, reference numeral 200 denotes a control device (control means) that controls the motors M1 and M2 and the electromagnetic valve 2502 based on the operation of the operation unit 13A. The control device 200 includes a dust collection amount detection sensor SA that detects the amount of dust collected in the dust collection chamber 73B (see FIG. 12) in the dust collection container 410 and outputs a dust collection amount detection signal. It is connected. The control device 200 is connected to a clogging detection means SB that detects the clogging amount of the filter PF that is a bypass filter from the suction airflow of the electric blower 24 when the pleated filter 100 is dusted and outputs a detection signal. Yes.

  As the dust collection amount detection sensor SA, a photoelectric sensor including a light emitting element and a light receiving element can be used. For example, when the dust collection case 74 of the dust collection container 410 is formed from a transparent resin, and the dust collection container 410 is mounted at a predetermined position in the dust collection unit chamber 22 provided in the cleaner body 11. The light emitting element and the light receiving element can be mounted in the dust collecting unit chamber 22 so that the light emitting element and the light receiving element of the photoelectric sensor are positioned between the upper part of the dust collecting case 74.

  Further, as the clogging detection means SB, a current detection circuit for detecting the suction air volume of the electric blower 24 by detecting the current of the electric blower 24 can be used, or the suction negative pressure of the electric blower 24 is detected. Therefore, it is possible to use an air volume detecting means for detecting the intake air volume of the electric blower 24. A cylinder-type dust clogging detection means can be used as the air volume detection means. In other words, the cylinder-type dust clogging detection means has a piston energized by a coil spring in the cylinder, and the piston has a leak air passage communicating with the atmosphere directly upstream of the suction opening 24A provided in the electric blower 24. In addition to the formation, a slide type variable resistor for detecting the movement amount of the piston may be provided. In this case, the intake air volume of the electric blower 24 can be detected from the output change of the slide type variable resistor.

  And it can be judged that the amount of clogging of filter PF which is a bypass filter is progressing as the amount of suction air of electric blower 24 decreases. Therefore, when the detection signal from the clogging detection means SB exceeds a predetermined value, that is, when the clogging detection means SB is a current detection circuit of the electric blower 24, the current value detected by the current detection circuit is When the predetermined value or more is reached, it can be determined that clogging of the filter PF which is a bypass filter has progressed considerably. Alternatively, when the clogging detection means SB is a cylinder-type dust clogging detection means, the clogging of the filter PF that is a bypass filter is considerably advanced when the output change of the slide type variable resistor exceeds a predetermined value. Can be judged.

  In these cases, even when dust is removed from the pleat filter 100, the sixth on-off valve K6 opens and the outside air is introduced as clean air from the outside air inlet 84F directly upstream of the pleat filter 100. Since almost no air flows into the bypass air passage 2500 due to clogging, fine dust dropped from the pleated filter 100 by the dust means 2100 passes through the return air path 2511 to the dust separation means 55 and the dust collecting chamber 73B side. It will not flow.

  As a result, when the clogging of the filter PF that is a bypass filter has progressed considerably, there is no point in introducing the outside air as cleaning air from the outside air inlet 84F directly upstream of the pleat filter 100 when the pleat filter 100 is dedusted. It is necessary to notify that fact.

  Therefore, when the notification unit SP such as a speaker is connected to the control device 200 and the clogging of the filter PF that is a bypass filter has progressed considerably, the control device 200 controls the pleated filter 100 before starting dust removal. “Filter PF is clogged. Clean filter PF.” Or “Filter PF is clogged. Replace filter PF with sound by a notification means SP such as a speaker connected to apparatus 200. Please let me know "and other messages. Moreover, in this case, the control device 200 is set so that the dust removal means 2100 does not remove the dust from the pleat filter 100 by not driving the motor M1 even at the dust removal start timing.

  When the dust collection amount in the dust collection chamber 73B exceeds a predetermined amount, fine dust dropped from the pleat filter 100 by the dust removing means 2100 during the dust removal of the pleat filter 100 is returned to the return air passage 2511 by the cleaning air. Even if it flows to the dust separating means 55 side through the dust separating means 55, it does not flow to the dust collecting chamber 73B side, but passes through the dust separating means 55 and flows to the filter PF side, causing clogging of the filter PF. It is better not to remove dust from the pleated filter 100. In this case, it is better not to detect clogging of the filter PF or remove dust from the pleated filter 100.

Therefore, the control device 200 detects clogging when the dust collection amount detection sensor SA detects that the dust collection amount in the dust collection chamber 73B exceeds a predetermined value before starting the dust removal of the pleated filter 100. It is set not to detect clogging by means SB. In addition, in this case, the control device 200 notifies a message such as “Please discard the dust in the dust collecting chamber” by the notification means SP such as a speaker before starting the dust removal of the pleated filter 100 and starts the dust removal. Even if it is timing, it is set so that the dust removal means 2100 does not remove dust from the pleat filter 100 by not driving the motor M1.
[Operation]
Next, operation | movement of the vacuum cleaner comprised as mentioned above is demonstrated.

  First, as shown in FIG. 2, the dust collection unit 50 is mounted in the dust collection unit chamber 22 of the cleaner body 11, and the dust collection hose 12 is connected to the connection port 11 </ b> A of the cleaner body 11 as shown in FIG. 1. At the same time, the suction port body 15 is connected to the hand operation tube 13 via the extension tube 14.

  At this time, as shown in FIG. 21, the first on-off valve K1, the third on-off valve K3, and the fourth on-off valve 28 are opened, and the second on-off valve K2, the fifth on-off valve 2502, and the sixth on-off valve. K6 is closed.

  That is, the slide plate 2203 is moved rightward from the position shown in FIGS. 19 and 20, the first on-off valve K1 is moved to the chain line position shown in FIG. 23, the connection opening 54Aa is opened, and the sixth on-off valve K6 is closed as shown in FIGS. 19 and 20, and the third on-off valve K3 is moved to the position indicated by the chain line in FIG. 31 to open the connection opening 84A of the storage case 81.

  When the switch 13b of the operation unit 13A of the hand operation tube 13 is operated, the electric blower 24 is driven. By driving the electric blower 24, air is sucked from the suction opening 24 </ b> A of the electric blower 24, a negative pressure acts in the storage case 81 of the dust collection unit 50 through a connection air passage portion (not shown), and suction air It acts on the inside of the dust collection case 74 and the separation chamber portion 54 of the dust separation portion 52 via the passage portion 56. Then, the negative pressure acts on the dust collecting hose 12, the extension pipe 14 and the suction port body 15 via the guide air passage body 57, and dust is sucked together with air from the suction port body 15.

  The sucked dust and air are sucked into the suction connection port 57A of the dust collecting unit 50 through the extension pipe 14 and the dust collecting hose 12. The dust and air sucked into the suction connection port 57A are introduced into the separation chamber portion 54 of the dust separation portion 52 through the guide air passage body 57, and rotate counterclockwise in FIG. I will do it. Even if the second on-off valve K2 is opened by this air flow, it is forcibly closed.

  Then, the dust and air are separated by inertia by this rotation, and the air passes through the net filter NF1 (see FIG. 12) of the dust separating means 55 and the net filter NF2 (see FIG. 24) of the opening 154B, and further, the suction air passage section 56. Then, the air is sucked into the storage case 81 of the filter unit 80.

  On the other hand, the separated dust is introduced together with a part of air into the communication case portion 72 of the dust collecting container 410 from the introduction opening 53A of the separation chamber portion 54 by inertial force. The introduced dust and air are sucked into the dust collection chamber portion 73 through the communication passage 71 of the communication case portion 72, and the dust is collected in the dust collection chamber portion 73.

  The air sucked into the dust collection chamber portion 73 is sucked into the suction air passage portion 56 through the net filter NF3 and further sucked into the storage case 81 of the filter portion 80.

  The air sucked into the storage case 81 passes through the pleated filter 104 of the pleated filter body 100 and is sucked into the suction pipe 27 (see FIG. 21) in the connection air passage portion 25 of the cleaner body 11, and further the electric blower 24. Is sucked into the suction opening 24A.

  Air sucked into the suction opening 24A of the electric blower 24 passes through the electric blower 24 and is exhausted from the exhaust port 20H (see FIG. 21) of the cleaner body 11 shown in FIG.

  When the dust collected in the dust collecting container 410 is discarded after the cleaning is completed, the operation unit 701 of the clamp 700 is pressed from above. By this pressing, the clamp 700 rotates counterclockwise around the shaft portion 703 from the position shown in FIG. 7 against the biasing force of a spring (not shown).

  When the clamp 700 is rotated counterclockwise, the locking claw 707 of the clamp 700 is disengaged from the distal end portion 511 of the engaging member 510 of the lid case 500 as shown in FIG. Is done. When this lock is released, the lid case 500 is opened by the torsion coil spring 18 (see FIG. 5) as shown by a chain line in FIG.

  On the other hand, when the clamp 700 is rotated as shown in FIG. 9, the pressing portion 705 of the clamp 700 moves the slide member 1201 to the right, and this movement causes the hook 72 </ b> F of the dust collecting container 410 to move to the opening 1204 of the slide member 1201. The dust container 410 is released from the edge 1204a and unlocked. Then, the ribs 72R and 74R of the dust collecting container 410 are pushed upward by the urging force of the springs 1102 and 1112 of the guide cases 1101 and 1111 as shown in FIG. That is, the dust collecting container 410 is popped up by the urging force of the springs 1102 and 1112 as shown in FIG.

  By the way, when there is a gap between the pressing portion 705 of the clamp 700 and the tip portion 1201a of the slide member 1201, when the operation portion 701 of the clamp 700 is pressed, the pop-up of the dust collecting case 410 is opened after the lid case 500 is opened. Done.

Thus, simply pressing the operation part 701 of the clamp 700 opens the lid case 500 and pops up the dust collecting container 410, so that it is easy to remove the dust collecting container 410 from the cleaner body 11. Become.
(Dust removal and air cleaning of pleated filter 100)
Further, the control device 200 enters the dust removal start mode of the pleat filter 100 when the switch 13a of the operation unit 13A of the hand control tube 13 is operated, but before the dust removal starts, the dust collection amount detection sensor SA collects the dust. Based on the dust amount detection signal, it is determined whether or not the dust collection amount in the dust collection chamber 73B has reached a predetermined value or more. That is, when dust is collected to the upper part in the dust collection chamber 73B, the photoelectric sensor as the dust collection amount detection sensor SA detects the dust in the dust collection chamber 73B and outputs a dust collection amount detection signal. The dust collection amount detection signal is input to the control device 200. The control device 200 determines whether or not the dust collection amount in the dust collection chamber 73B is full based on whether or not a dust collection amount detection signal is input from the photoelectric sensor that is the dust collection amount detection sensor SA. .

  Then, when there is no dust collection amount detection signal from the photoelectric sensor which is the dust collection amount detection sensor SA, the control device 200 determines that the dust collection amount in the dust collection chamber 73B is not full. Next, the control device 200 determines whether or not the detection signal from the clogging detection means SB exceeds a predetermined value. That is, when the clogging detection means SB is a current detection circuit of the electric blower 24, it is determined whether or not the current value detected by the current detection circuit is equal to or greater than a predetermined value. In the case of the type dust detection means, it is determined whether or not the output change of the slide type variable resistor exceeds a predetermined value.

  And the control apparatus 200 starts the dust removal operation | movement of the pleat filter 100, when the detection signal from the clogging detection means SB does not exceed predetermined value.

  That is, when the detection signal from the clogging detection means SB does not exceed a predetermined value, the control device 200 controls the motor M2 to close the fourth on-off valve 28 as shown in FIG. The fifth on-off valve 2502 is opened. Then, the lattice member 600 is rotated by the motor M1 (see FIG. 37).

  The rotation of the lattice member 600 causes the pleated filter body 100 to rotate, and the projection 2104 of the arm 2002 of the dust removing mechanism 2000 abuts against the peak portion of the pleated filter 104, whereby the arm 2002 and the shaft 2001 are moved from the chain line position in FIG. It rotates with the pleated filter body 100 around.

  When the arm 2002 is rotated to the position shown in FIG. 31, the end of the groove 84M restricts the rotation of the arm 2002 and the shaft 2001, and only the pleat filter body 100 rotates.

  When the arm 2002 rotates to the position shown in FIG. 31, the third on-off valve K3 closes the connection opening 84A of the storage case 81. Further, the shaft portion 2011 of the arm 2002 presses the contact piece 87 of the sixth on-off valve K6 to open the sixth on-off valve K6. That is, as shown in FIG. 33, the outside air inlet 84F of the storage case 81 is opened.

  On the other hand, when the shaft 2001 is rotated together with the arm 2002, the gear 2201 of the opening / closing mechanism 2200 is rotated, and the slide plate 2203 is moved to the left by the rotation of the gear 2201, and FIGS. Move to the position shown in. By the movement of the slide plate 2203, as shown in FIG. 23, the first on-off valve K1 moves from the chain line position to the solid line position, and the connection opening 54Aa of the guide air passage body 57 is closed.

  In this way, as shown in FIG. 22, the first and second on-off valves K1, K3 are closed, and the sixth on-off valve K6 is opened.

  The electric blower 24 is driven with a predetermined power (for example, approximately half the power during normal cleaning), and the lid case 500 is sealed to the main body case 20 by opening the sixth on-off valve K6. Accordingly, the outside air is introduced from the outside air introduction port 84F of the storage case 81 as shown in FIG.

  On the other hand, as the rotation of the arm 2002 stops, the projection 2104 of the arm 2002 moves over the peak portion of the pleat filter 104 along with the rotation of the pleat filter 104, and the projection 2104 of the arm 2002 moves over the peak portion of the pleat filter 104 each time it gets over. The fine dust adhering to the pleated filter 104 is dropped by hitting.

  The fine dust dropped from the pleated filter 104 is returned to the separation chamber portion 54 of the dust separation portion 52 through the return air passage 2511 by the outside air introduced from the outside air introduction port 84F.

  Further, since the outside air introduced from the outside air introduction port 84F hits the pleated filter 104, the pleated filter 104 is washed with air.

  Since the second on-off valve K2 is opened by the outside air passing through the return air passage 2511 as shown in FIG. 25, fine dust dropped from the pleated filter 104 can be surely returned to the separation chamber portion 54 of the dust separation portion 52. it can.

  The outside air and fine dust introduced into the separation chamber 54 rotate counterclockwise in FIG. 10, and by this rotation, fine dust and air are separated by inertia, and the separated fine dust is separated by inertia force. The dust is collected from the introduction opening 53 </ b> A of the chamber portion 54 to the dust chamber portion 73 via the communication case portion 72 of the dust collecting container 410.

  The air separated from the fine dust passes through the net filter NF1 (see FIG. 12) of the dust separating means 55 and the net filter NF2 (see FIG. 25) of the opening 154B, and is further sucked into the suction air passage section 56. . The outside air sucked into the suction air passage portion 56 is sucked into the suction pipe 27 through the filter PF and the bypass air passage 2500, and further sucked into the suction opening 24A of the electric blower 24 and exhausted from the exhaust port 20H of the cleaner body 11. It will be done.

  Thus, since the fine dust dropped from the pleat filter 104 is returned to the separation chamber 54 of the dust separation part 52, it is prevented from adhering to the pleat filter 104 again.

When the predetermined time has elapsed, the driving of the electric blower 24 is stopped and the lattice member 600 is reversely rotated by a predetermined angle. As shown in FIG. 21, the first on-off valve K1, the third on-off valve K3, and the fourth The on-off valve 28 is opened, and the second on-off valve K2, the fifth on-off valve 2502, and the sixth on-off valve K6 are closed. According to this embodiment, since the second on-off valve K2 is opened and closed by the air flow, the configuration can be simplified.
(Notification of clogging of filter PF)
As described above, the control device 200 enters the dust removal start mode of the pleat filter 100 when the switch 13a of the operation unit 13A of the hand operation tube 13 is operated. Based on the dust collection amount detection signal from SA, it is determined whether or not the dust collection amount in the dust collection chamber 73B has reached a predetermined value or more. That is, when dust is collected to the upper part in the dust collection chamber 73B, the photoelectric sensor as the dust collection amount detection sensor SA detects the dust in the dust collection chamber 73B and outputs a dust collection amount detection signal. The dust collection amount detection signal is input to the control device 200. The control device 200 determines whether or not the dust collection amount in the dust collection chamber 73B is full based on whether or not a dust collection amount detection signal is input from the photoelectric sensor that is the dust collection amount detection sensor SA. .
<When the amount of dust in the dust chamber 73B is full>
Then, when there is a dust collection amount detection signal from the photoelectric sensor that is the dust collection amount detection sensor SA, the control device 200 determines that the dust collection amount in the dust collection chamber 73B is full.

In this case, the control device 200 does not determine whether or not the detection signal from the clogging detection unit SB exceeds a predetermined value. In addition, in this case, the control device 200 notifies a message such as “Please discard the dust in the dust collecting chamber” by the notification means SP such as a speaker before starting the dust removal of the pleated filter 100 and starts the dust removal. Even at the timing, the dust removal unit 2100 does not remove the dust from the pleat filter 100 by not driving the motor M1.
<When the amount of dust in the dust chamber 73B is not full>
Further, when there is no dust collection amount detection signal from the photoelectric sensor that is the dust collection amount detection sensor SA, the control device 200 determines that the dust collection amount in the dust collection chamber 73B is not full. In this case, the control device 200 next determines whether or not the detection signal from the clogging detection means SB exceeds a predetermined value. That is, when the clogging detection means SB is a current detection circuit of the electric blower 24, it is determined whether or not the current value detected by the current detection circuit is equal to or greater than a predetermined value. In the case of the type dust detection means, it is determined whether or not the output change of the slide type variable resistor exceeds a predetermined value.

  When the clogging detection means SB is the current detection circuit of the electric blower 24, the control device 200 detects the filter PF that is a bypass filter when the current value detected by the current detection circuit is equal to or greater than a predetermined value. Judge clogging is progressing considerably. Further, when the clogging detection means SB is a cylinder-type dust clogging detection means, the control device 200 clogs the filter PF that is a bypass filter when the output change of the slide type variable resistor exceeds a predetermined value. Judging that is progressing considerably.

  Thus, when the clogging of the filter PF that is a bypass filter has progressed considerably, the control device 200 uses a voice by the notification means SP such as a speaker connected to the control device 200 before starting the dust removal of the pleated filter 100, Other messages such as “The filter PF is clogged. Clean the filter PF.” Or “The filter PF is clogged. Replace the filter PF.” In addition, in this case, the control device 200 prevents the dust removal unit 2100 from removing dust from the pleat filter 100 by not driving the motor M1 even at the timing of starting dust removal.

  As described above, in the electric vacuum cleaner according to the embodiment of the present invention, the air is transmitted through the main dust separating / collecting means (dust separating unit 52, dust collecting container 410, etc.) and the pleated filter 100 in this order. A suction main air passage (an air passage shown by arrows A1 to A3 in FIG. 21) that flows into the suction opening 24A of FIG. 24, dust removing means 2100 that drops fine dust adhering to the pleated filter 100, and dust removal by the dust removing means 2100 A fine dust return air passage (return air passage 2511) for returning the fine dust together with air to the main dust separation / collection means (dust separation portion 52, dust collection container 410, etc.) and the suction main air passage (FIG. 21). Air in the direction of arrows A1 to A3), and air is bypassed from the main dust separation / collection means (dust separation portion 52, dust collection container 410, etc.) to the suction opening 24A. A bypass air passage 2500 flows through the filter PF), and a cleaning air introducing air passage for introducing air as the cleaning air immediately upstream of the pleated filter 100 (the outside air introduction port 84F).

  In addition, the vacuum cleaner includes a first on-off valve K1 that opens and closes a suction air passage (suction connection port 57A) to the main dust separation / collection means (dust separation unit 52, dust collection container 410, etc.); A second on-off valve K2 for opening and closing the fine dust return air passage (return air passage 2511), the main dust separation / collection means (dust separation portion 52, dust collection container 410, etc.) and the pleat filter 100; A third on-off valve K3 that opens and closes the suction air passage (connection opening 84A), and a fourth on-off valve 28 that opens and closes the suction flow air passage (opening 27A) between the pleated filter 100 and the suction opening 24A. And a fifth on-off valve 2502 for opening and closing the bypass air passage 2500, and a sixth on-off valve K6 for opening and closing the washing air introduction air passage (outside air introduction port 84F).

  In addition, at the time of cleaning, the first, third, and fourth on-off valves (K1, K3, K4) open the suction air passages (suction connection port 57A, connection opening 84A, opening 27A), respectively, and the second The fine dust return air passage (return air passage 2511), the bypass air passage 2500, and the washing air introduction air passage (outside air introduction port 84F) are closed by the fifth and sixth on-off valves (K2, 2502, K6), respectively. When removing dust from the pleated filter 100, the first, third and fourth on-off valves (K1, K3, K4)) close the suction air passages (suction connection port 57A, connection opening 84A, opening 27A). In addition, the fine dust return air passage (return air passage 2511), the bypass air passage 2500, and the cleaning air introduction air passage (outside air introduction port 84F) are provided by the second, fifth, and sixth on-off valves (K2, 2502, K6). To open each one You have me.

  Further, clogging detection means SB for detecting a clogged state of the bypass filter (filter PF) before starting dust removal of the pleat filter 100 and inputting a detection signal to the control means (control device 200) is provided. When the detection signal from the clogging detection means SB exceeds a predetermined value, the control means (control device 200) notifies the fact through the notification means.

  According to this configuration, it is possible to easily know whether or not the bypass filter is clogged.

  In the vacuum cleaner according to the embodiment of the present invention, the dust collection amount is detected by detecting the dust collection amount in the dust collection chamber of the main dust separation / collection means (dust separation unit 52, dust collection container 410, etc.). A dust collection amount sensor SA that outputs a signal is provided, and the control means (control device 200) determines whether or not the dust collection amount in the dust collection chamber is full from the dust collection amount detection signal. If the pleat filter is not full, the clogging detection means detects the clogged state of the bypass filter when the pleated filter is dedusted.

It is the perspective view which showed the external appearance of the electric vacuum cleaner which concerns on this invention. It is the perspective view which showed the external appearance of the cleaner body of FIG. 1 which removed the cover case. It is a top view of the cleaner body shown in FIG. It is the perspective view which expanded some vacuum cleaner main bodies of Drawing 2 which removed a dust collecting container. It is explanatory drawing which showed the torsion coil spring 18 with which the cylindrical axle of the cleaner body was mounted | worn. It is explanatory drawing which showed the engagement relationship of the latching claw of a clamp, and the engaging member of a cover case. It is explanatory drawing which showed the pop-up mechanism of a dust collecting container. It is the top view which showed the clamp. It is explanatory drawing which showed cancellation | release of the lock | rock of a lid case, and cancellation | release of the lock | rock of a dust collection case. It is the perspective view which showed the external appearance of the dust collection unit. It is the perspective view which showed the external appearance of the dust collecting container. It is the cross-sectional view which showed the structure of the dust collection unit. It is the perspective view which showed the external appearance of the dust separation part. It is a cross-sectional view of a cleaner body. It is explanatory drawing which showed the state by which the dust collecting container was popped up. It is a side view of the cleaner body for explaining opening of a lid case. It is explanatory drawing which showed the state by which the dust collecting container was popped up. It is explanatory drawing which showed the dust removing means and the front wall part of a storage case. It is the perspective view which showed the structure of the opening / closing mechanism. It is the perspective view which showed the opening / closing mechanism and the dust separation part. It is the conceptual diagram which showed the air path at the time of performing normal cleaning. It is the conceptual diagram which showed the air path at the time of performing air washing. It is the horizontal sectional view which showed the structure of the dust separation part of 1st Example. It is explanatory drawing which showed the dust separation part and the return air duct. It is the perspective view which showed the external appearance of the dust separation part of FIG. It is the longitudinal cross-sectional view which showed the structure of the vacuum cleaner main body. It is the perspective view which showed the storage case. It is the perspective view which showed the storage case shown in FIG. It is a rear view of the storage case shown in FIG. It is the perspective view which showed the external appearance of the dust collection unit. It is explanatory drawing which showed the arm with which the storage case was mounted | worn, and the 3rd on-off valve. It is the perspective view which showed the arm and the 3rd on-off valve. It is the perspective view which showed the external appearance of the dust collection unit which the 6th on-off valve opened. It is explanatory drawing which showed the 6th on-off valve and the external air inlet. It is the cross-sectional view which showed the structure of the dust removal means. FIG. 36 is a secondary sectional view of the dust removing means shown in FIG. 35. It is the block diagram which showed the structure of the control system.

Explanation of symbols

24 ... Electric blower 24A ... Suction opening 27A ... Opening (suction flow path)
28 ... Fourth open / close valve 52 ... Dust separator (part of main dust separator / collector)
57A ... Suction connection port (suction air passage)
84A ... Connection opening (suction air passage)
84F ... Outside air inlet (cleaning air inlet)
410 ... Dust collection container (part of main dust separation / collection means)
DESCRIPTION OF SYMBOLS 100 ... Pleat filter 200 ... Control apparatus (control means)
2100 ... dust removal means 2500 ... bypass air passage 2502 ... fifth on-off valve 2511 ... return air passage (fine dust return air passage)
K1 ... 1st on-off valve K2 ... 2nd on-off valve K3 ... 3rd on-off valve K6 ... 6th on-off valve PF ... Filter (bypass filter)
SA ... Dust collection sensor SB ... Clogging detection means SP ... Notification means

Claims (2)

Air is passed through the main dust separation / collection means and the pleated filter in this order, and the suction main air passage that flows to the suction opening of the electric blower; A fine dust return air passage that returns fine dust together with air to the main dust separation / collection means, and a bypass filter that is arranged in parallel with the suction main air passage so that air passes from the main dust separation / collection means to the suction opening. A bypass air passage that flows through the pleated filter, and a cleaning air introduction air passage that introduces air as cleaning air immediately upstream of the pleat filter,
A first on-off valve for opening / closing a suction air passage to the main dust separation / collection means; a second on-off valve for opening / closing the fine dust return air passage; the main dust separation / collection means; and the pleats A third on-off valve for opening and closing a suction air passage between the filter, a fourth on-off valve for opening and closing a suction flow air passage between the pleat filter and the suction opening, and opening and closing the bypass air passage. A fifth on-off valve and a sixth on-off valve for opening and closing the washing air introduction air passage;
At the time of cleaning, the suction air passages are opened by the first, third, and fourth on-off valves, and the fine dust return air passage, bypass air passage, and washing air are introduced by the second, fifth, and sixth on-off valves. While the air passages are respectively closed, when the pleated filter is dedusted, the suction air passages are closed by the first, third, and fourth on-off valves, and the fine passages are closed by the second, fifth, and sixth on-off valves. A vacuum cleaner that opens each of the dust return air passage, the bypass air passage, and the cleaning air introduction air passage;
Clogging detection means for detecting a clogged state of the bypass filter and inputting a detection signal to the control means before dust removal of the pleat filter is provided, and the control means detects a detection signal from the clogging detection means. A vacuum cleaner characterized in that when the value exceeds a predetermined value, the fact is notified through a notification means.   The vacuum cleaner according to claim 1, wherein a dust collection amount sensor for detecting a dust collection amount in a dust collection chamber of the main dust separation / collection means and outputting a dust collection amount detection signal is provided, The control means determines from the dust collection amount detection signal whether or not the dust collection amount of the dust collection chamber is full. A vacuum cleaner characterized by being detected by the clogging detection means.

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