JP4663552B2 - Electric vacuum cleaner - Google Patents

Description

  The present invention relates to a vacuum cleaner.

  General vacuum cleaners guide the dust-containing air sucked from the suction port to the vacuum cleaner body, collect the dust through the dust collection part in the vacuum cleaner body, and remove the air cleaned by the dust collection outside the vacuum cleaner body. It is the structure which exhausts. The dust collection unit is configured to capture and collect dust by filtration using a paper filter or the like, or to collect dust by collecting dust using a dust collection filter.

  In the case of using a dust collection filter, for example, as shown in Patent Document 1, there is one in which polytetrafluoroethylene is disposed in the uppermost stream and a breathable support member made of a non-woven fabric having high strength is provided on the back surface. Also, there is one in which a porous protective film having higher hardness than the porous film is provided on the upstream side of the polytetrafluoroethylene porous film.

  Further, as described in Patent Document 2, a polytetrafluoroethylene porous film is arranged in the most upstream, a support layer such as a nonwoven fabric is provided, and a polytetrafluoroethylene porous film is provided on the back surface thereof, Some use a filter part provided with a support layer such as a nonwoven fabric on the back.

JP 2005-278976 A JP 2005-246233 A

  In the above-mentioned patent document, a porous film of polytetrafluoroethylene is arranged upstream of the dust collection filter, and when the collected dust is discarded, the dust adhering to the dust collection filter is improved. However, when dust is collected and discarded repeatedly and the cleaner is used, fine fibrous dust or the like enters the filter portion. The fibrous dust that has entered the filter section cannot be removed sufficiently even if it is removed by hitting the filter, etc., so fine dust adheres to and mixes with the fiber dust that has entered the filter section. To go. In order to remove this dust, the user cleaned the filter part by rubbing the filter surface with a brush or the like or washing it with water. If the filter surface is rubbed with a brush or washed with water, the low-strength polytetrafluoroethylene porous film will be destroyed, so in Patent Document 1, it will be destroyed and fine dust will come out from the part. So there was a problem of being unsanitary.

  In order to solve this, as described in Patent Document 2, it has been proposed to protect the second porous film using two layers of polytetrafluoroethylene. When the dust collection performance is increased, the resistance to the flow of the porous membrane increases, and it is difficult to achieve high suction performance.

  An object of the present invention is to solve the above-mentioned problems, and to provide a vacuum cleaner that realizes and maintains a strong suction force and further facilitates maintenance of a dust collection filter.

In order to achieve the above object, a feature of the present invention is that a vacuum cleaner main body incorporating an electric blower, a dust collecting portion provided in the vacuum cleaner main body, and a vacuum hose connected to the vacuum cleaner main body. In the vacuum cleaner having a suction port and a filter part provided on the downstream side of the dust collection part for collecting dust, the filter part is provided with a porous film made of polytetrafluoroethylene in the first layer. , porous membrane from the upstream side composed of the polytetrafluoroethylene, nonwoven, charging filter, and a four-layer structure in which the order of the non-woven fabric, porous membrane flow resistance comprising a flow resistance of said charging filter from said polytetrafluoroethylene It is lower .

Further, the present invention is characterized by a vacuum cleaner main body incorporating an electric blower, a dust collecting portion provided in the vacuum cleaner main body, a suction port connected to the vacuum cleaner main body via a hose, in electric vacuum cleaner having a filter unit for dust collecting dust is provided downstream of the particulate collection portion, the filter unit, the porous film made of polytetrafluoroethylene first layer disposed, wherein from the upstream side It has a four-layer structure in which a porous film made of polytetrafluoroethylene, a non-woven fabric with higher strength than the porous film, a charging filter, and a non-woven fabric with higher strength than the porous film are arranged in this order. This is because the flow resistance of the porous membrane made of tetrafluoroethylene is made lower .

  Further, the present invention is characterized in that the dust collection performance of the charging filter is higher than the dust collection performance of the porous film made of the polytetrafluoroethylene.

Further, the present invention is characterized by a vacuum cleaner main body incorporating an electric blower, a dust collecting portion provided in the vacuum cleaner main body, a suction port connected to the vacuum cleaner main body via a hose, in electric vacuum cleaner having a filter unit for dust collecting dust is provided downstream of the particulate collection portion, a nonwoven fabric made of polytetrafluoroethylene first layer disposed, the filter unit, from said upstream polytetra A non-woven fabric made of fluoroethylene, a non-woven fabric, a charging filter, and a non-woven fabric are arranged in this order, and the flow resistance of the charging filter is made lower than the flow resistance of the non-woven fabric made of polytetrafluoroethylene .

Further, the present invention is characterized by a vacuum cleaner main body incorporating an electric blower, a dust collecting portion provided in the vacuum cleaner main body, a suction port connected to the vacuum cleaner main body via a hose, in electric vacuum cleaner having a filter unit for dust collecting dust is provided downstream of the particulate collection portion, a nonwoven fabric made of polytetrafluoroethylene first layer disposed, the filter unit, from said upstream polytetra nonwoven fabric made of tetrafluoroethylene, said polytetrafluoroethylene higher strength than nonwoven fabric made of ethylene nonwoven, charging filter, said a polytetrafluoroethylene four-layer structure configured in order of higher strength than nonwoven nonwoven fabric made of the flow of the charging filter The resistance is lower than the flow resistance of the non-woven fabric made of polytetrafluoroethylene .

  In addition, a feature of the present invention is that the dust collection performance of the charging filter is higher than the dust collection performance of the nonwoven fabric made of polytetrafluoroethylene.

  In addition, a feature of the present invention is that the filter portion has a folded shape.

  According to the present invention, the first layer of the filter portion is composed of a porous film of polytetrafluoroethylene (PTFE), the second layer is composed of a non-woven fabric, and the third layer is composed of a charge filter in which the non-woven fabric is charged. And since it comprised with the filter of the at least 4 layer structure which comprises a 4th layer with a nonwoven fabric, since dust collection performance is high and flow resistance is small, the suction power of a cleaner can be made high. In the present invention, since the charging filter is provided in the third layer in particular, the dust collection performance is high and the flow resistance can be reduced.

  In addition, because it has good dust separation, it can maintain high suction force for a long time, and filter resistance can be easily reduced by rubbing the filter with a brush or removing water adhering to the clogged filter by washing with water. Since it can be made smaller, it has the effect of being easy to maintain.

  Furthermore, the effect that the fall of the dust collection capability when rubbing with a brush can be suppressed by making the dust collection capability of the third layer higher than the first layer is obtained. Further, by making the flow resistance of the third layer smaller than that of the first layer, an effect that the flow resistance can be lowered even if the dust collecting ability is high is obtained.

  As described above, it is possible to realize an easy-to-maintain vacuum cleaner that is not easily clogged, easily maintains the suction force, and has a high suction performance.

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

  Embodiments of the present invention will be described with reference to the following drawings. FIG. 1 is an external perspective view of a vacuum cleaner showing an embodiment of the present invention. FIG. 2 is a perspective view showing a state in which the upper cover of the cleaner body is opened. FIG. 3 is a horizontal plan view with the upper lid and the upper case removed. FIG. 4 is a schematic diagram showing the flow of air in the cleaner body. FIG. 5 is a cross-sectional view of the dust collecting portion. FIG. 6 is a cross-sectional view of the dust collecting portion. FIG. 7 is a view of the dust collecting portion as viewed from the back. FIG. 8 is a schematic diagram showing a cross section of the filter.

  As shown in FIG. 1, the electric vacuum cleaner in this embodiment includes a vacuum cleaner body 1, a hose 2, a hand operating part 3, a telescopic extension tube 4, and a suction mouth 5. A hose 2 is used for connection, and a suction port 5 is connected to the hand operating section 3 via an expansion / contraction extension tube 4 for use.

  The vacuum cleaner body 1 incorporates an electric blower (described later), and sucks in dust from the intake flow by sucking in from the suction port 5 by the suction force of the electric blower. Then, the vacuum cleaner main body 1 is sucked through the hand operating section 3 and the hose 2, and dust is collected (collected) by a cyclone separation type dust collecting section (described later), and then exhausted outside the apparatus.

  2 and 3, the vacuum cleaner main body 1 includes a cyclone separating cylinder 104 between a lower case 101 and an upper lid 102, a dust collecting case 105 integrated with the cyclone separating cylinder 104, and a mesh filter 106. A dust collecting unit in which the filter frame 140 and the filter frame 163 with the folded filter 112 are integrally attached is detachably mounted. Between the lower case 101 and the upper case 150, the filter case 113, the electric blower 107, and the cord reel 110.

  As shown in FIG. 4, the vacuum cleaner main body 1 flows dust-containing air from the inlet pipe 115 into the cyclone separation cylinder 104 via the hose 2 and swirls upward from the lower side to turn the dust by centrifugal action. And the dust is conveyed to the dust collecting case 105 through the upper communication port 117, and the exhaust from the cyclone separation cylinder 104 passes through the inner cylinder 131 to the exhaust port 120 provided at the lower part of the cyclone separation cylinder 104. Is done. Part of the air flows into the dust collecting case 105 and is captured by the mesh filter 106. The exhaust from the dust collecting case 105 is sucked into the electric blower 107 through the frustration filter 112 from the dust collecting case exhaust port 144 located behind the mesh filter 106. At this time, the exhaust from the cyclone separation cylinder 104 is sucked into the electric blower 107 through the folding filter 112 together with the exhaust of the dust collecting case 105 from the communication passage 145 through the cyclone outlet 146. The exhaust from the electric blower 107 passes through the filter 108, partly through an exhaust passage (not shown), partly flows through the cord reel 110, cools them, and then is discharged outside the apparatus. .

  The lower case 101 includes a traveling wheel 208 and a guide wheel (not shown) for causing the cleaner body 1 to travel on the floor, and the cyclone separating cylinder 104 and the dust collecting case 105 are detachably mounted vertically. Further, the mesh filter 106 and the folding filter 112 are installed side by side.

  The upper lid 102 is attached to the upper rear portion of the upper case 150 so as to be able to rotate. When the upper lid 102 is closed, the inlet tube 115 and the hose connection port portion 116 of the cyclone separation cylinder 104 abut against each other in an airtight state. And the filter frame 140 and the filter frame 163 are in contact with each other in an airtight state, and the filter case 163 is in contact with the filter case 113 in which a protective filter (not shown) is accommodated. Energize as follows. Although the axial direction of the cyclone separating cylinder 104 is oriented in the vertical direction, it may be inclined in the oblique direction instead of the vertical direction.

  When the upper lid 102 is opened upward, the cyclone separation cylinder 104, the dust collecting case 105, the filter frame 140, and the filter frame 163 are slightly lifted from the lower case 101. In this state, the cyclone separation cylinder 104, the dust collection case 105, the filter frame 140, and the filter frame 163 can be separated and taken out by holding the handle 123 at the top of the dust collection case 105, and the filter frame 140 is removed from the dust collection case 105. By simultaneously opening the filter frame 163, the dust in the dust collecting case 105 is discarded.

  Next, with reference to FIG. 3, arrangement | positioning inside the vacuum cleaner main body 1 is demonstrated. FIG. 3 is a plan view with the upper case 150 and the upper lid 102 removed. The hose connection port 116 is located at the center in the width direction of the main body 1 when viewed from above, the center axis of the cyclone separation cylinder 104 is shifted from the center in the width direction, and air flows in the substantially tangential direction of the cyclone separation cylinder 104. The inlet pipe 115 and the hose connection port 116 are arranged in a straight line. The dust collection case 105 is installed on the opposite side of the width direction from the center axis of the cyclone separation cylinder 104. Similarly, the electric blower 107 is installed on the opposite side of the center axis of the cyclone separation cylinder 104 in the width direction, and a folding filter 112 is provided on the front surface thereof. The cord reel 110 is installed beside the electric blower 107, and the central axis of the cyclone separating cylinder 104 is installed in the same direction in the width direction.

  By arranging in this way, the length of the main body can be shortened, and a small size and light weight can be achieved. Further, since it is not necessary to provide a bend or the like at the inlet portion of the cyclone separation cylinder 104, an effect of reducing loss can be obtained.

  Here, the direction in which the dust centrifuged in the cyclone separation cylinder 104 flows out of the cyclone separation cylinder 104 through the communication port 117 is a turning direction in the cyclone separation cylinder 104 and a tangential direction of the cyclone separation cylinder 104. . Therefore, in the present embodiment, the mesh filter 106 that opens and closes both the communication port 117 of the cyclone separation cylinder 104 and the upper opening 118 of the dust collection case 105 that communicates with the communication port 117. It can arrange | position in the front surface side (hose connection port part 116 side) of the vacuum cleaner main body 1 furthest from. Here, the dust centrifuged in the cyclone separation cylinder 104 is accumulated from the vicinity of the mesh filter 106 that opens and closes, and the communication port 117 of the cyclone separation cylinder 104 and the upper opening 118 of the dust collecting case 105 that communicates with the communication port 117. Since the particles are sequentially deposited to the side, it is difficult for the dust to block the communication port 117 and the upper opening 118 until the dust collecting case 105 is filled with dust. That is, the volume of the dust collecting case 105 can be effectively used.

  Here, the details of the dust collecting unit including the cyclone separating cylinder 104, the dust collecting case 105, the mesh filter 106, the folding filter 112, and the like will be described with reference to FIGS.

  The outer cylinder 135 of the cyclone separation cylinder 104 is provided with an inlet pipe 115 as an air intake port below the center of the cyclone separation cylinder 104 in the central axial direction, and the cyclone separation cylinder 104 having a substantially cylindrical shape. It is installed so that air can enter in the direction of tangential line. A communication port 117 is provided above the center of the cyclone separation cylinder 104 to allow air to flow into the dust collecting case 105 together with dust. An inner cylinder 131 is provided at the lower part of the cyclone separation cylinder 104 and is connected to the lower exhaust port 120. Here, if the inner cylinder cap 152 is attached to the inner cylinder 131 with a screw or the like, an elastic seal member 153 is attached between the exhaust port 120 and the communication passage 145, and the outer cylinder 135 and the inner cylinder 131 are attached via the elastic seal member 151. Easy to be airtight.

The inner cylinder 131 includes a cylinder part 134, a partition wall 132 spirally wound around the cylinder part 134, a guide wall 137 connecting the inlet pipe 115 and the cylinder part 134, and an outer wall 139 disposed on the outer peripheral side of the partition wall 132. In the cylindrical portion 134, a resin fiber mesh is integrally formed with the cylindrical portion 134 as a mesh filter 133 by insert molding. The opening of the inner cylinder 131 by the mesh filter 133 is not provided in the entire circumference of the cylindrical portion on the side surface of the inner cylinder 131, but the opening is not provided at about 90 degrees near the inlet pipe 115. For this reason, even if fine dust such as hair flows from the inlet pipe 115, it can be prevented from directly hitting the net filter 133, and can be prevented from getting stuck and entangled.

  The dust collection case 105 is provided with an upper opening 118 at a position facing the communication port 117 of the cyclone separation cylinder 104. A mesh filter 106 attached to the filter frame 140 is provided on the exhaust side of the dust collection case 105. The mesh filter 106 is made of a water-resistant plastic material, and in this case, in particular, a polyester plastic is used. Both sides of the filter frame 140 are open, and are provided so as to rotate about an opening / closing shaft 143 provided at the bottom. When the filter frame 140 is closed, the dust collection case 105 and the filter frame 140 are in an airtight state. Keeping in contact.

  A filter frame 163 is provided on the downstream side of the mesh filter 106. When the filter frame 140 and the filter frame 163 are closed, they are in contact with each other while maintaining an airtight state. The filter frame 163 has openings on both sides, and is provided so as to rotate about an opening / closing shaft 143 provided at the lower part of the filter frame 140. A lever 142 is provided on the upper portion of the filter frame 163, and the filter frame 140 and the filter frame 163 are locked to the dust collecting case 105 side so as to keep an airtight state.

  At the time of throwing away the trash, the cyclone separating cylinder 104 and the dust collecting case 105 are taken out of the cleaner body 1 by holding the upper handle 123, the lever 142 is pushed, the filter frame 140 and the filter frame 163 are opened together, and the dust collecting case The dust in 105 can be thrown away. At this time, the dust contained in the pocket 162 can be discarded together. In the present embodiment, the opening / closing axis is on the bottom, and the filter frame 140 and the filter frame 163 are opened from the upper part in the figure. Therefore, it is preferable to throw away the dust collecting case 105 sideways. Although a detailed structure is omitted, if the opening / closing shaft is provided in the upper part and the lever is provided in the lower part, it will be difficult to apply to the filter frame side when dust in the dust collecting case 105 and pocket 162 is discarded. good.

  Since the folded filter 112 is integrally formed by insert molding in the filter frame 163, the ABS of the acrylonitrile butadiene styrene (ABS) -based filter frame 163 is the fiber of the folded filter 112 around the folded filter 112. Since it penetrates between the holes and is fixed, the folded filter 112 does not come off from the filter frame 163, and no air leaks from the portion where the filter frame 163 and the folded filter 112 are connected. It is in a state. As described above, the frustration filter 112 itself is soft, but the filter frame 163 is not easily deformed. Therefore, even if the frustration filter 112 is subjected to force by the air flow in a state where dust is accumulated, it does not come off from the filter frame 163. It has become.

  The frustration filter 112 is formed in a fold-like shape in which peaks and valleys are repeated in a direction substantially parallel to the floor surface, and there are peaks and troughs formed at substantially the same height in the vertical direction. A reinforcing portion 166 having a short length of plastic and having a protruding amount from the peak of the folded filter 112 of about 2 mm is formed integrally with the folded filter 112 at the top of the peak on the side. The reinforcing portion 166 receives a force when the dust remover of the dust removing means hits, moves to the side of the folding filter 112, moves to return to the original when the dust removing element is detached, and the folding filter 112 vibrates. Since the reinforcing portion 166 is hard, it is possible to obtain an effect of preventing the folding filter 112 from being broken even if it is repeatedly used. Since the reinforcing portion 166 and the folded filter 112 are also made by insert molding, since the plastic material enters between the fibers and the holes of the folded filter 112, it is firmly fixed. Difficult to peel off from the frustration filter 112.

  A cross-sectional configuration of the folding filter 112 is shown in FIG. The folding filter 112 is composed of four layers. The first layer 301 is a porous film of polytetrafluoroethylene (PTFE) as viewed from the upstream side, and the second layer 302 is polyethylene (PE) and polyethylene terephthalate (PET). ), A third layer 303 is a charging filter charged with the nonwoven fabric, and a fourth layer 304 is a polyethylene terephthalate nonwoven fabric. The first layer and the second layer are attached by adhesion. Both the third layer and the fourth layer are attached by adhesion.

  Here, the charge filter is a dielectric filter in which each filter fiber is charged and permanently polarized, and is added with a dust collection mechanism by electrostatic force obtained by charging. High dust collection efficiency can be obtained with low pressure loss compared to filters. In particular, in this embodiment, a nonwoven fabric made by a melt blow manufacturing method in which melted superfine fibers of a thermoplastic resin are extruded and spun and blown by an air flow and self-adhered in a sheet shape is used. Polypropylene is used as the dielectric, the fiber diameter is several μm, and the size of the gap between the fibers is also several μm. This type of charging filter increases dust collection performance when the amount of fibers used, so-called basis weight, is increased, but it also tends to increase the pressure loss when air passes through it. Since the electrostatic force can be increased, the dust collection performance can be improved without increasing the pressure loss of the flow.

On the other hand, the non-woven fabric used for the second layer and the fourth layer has a fiber diameter of several tens of μm and a large fiber diameter. Therefore, the first layer and the third layer are significantly higher in strength, Since the gap between the fibers is as wide as several tens of μm, the dust collection performance of fine dust is remarkably low, and the pressure loss when air passes is small.

  On the other hand, a porous film of polytetrafluoroethylene having a pore diameter of 0.1 to 10 μm or less is used. Polytetrafluoroethylene has a very high slipperiness. For example, dust that has reached this porosity easily escapes from the porous holes, and therefore has a property that dust is easily peeled off when the porous film vibrates. Further, when the hole diameter is increased, the dust collection performance is lowered, but the flow resistance can be reduced. However, since dust is mechanically collected, the flow resistance tends to increase with the same flow resistance as compared with the charge filter.

  In this embodiment, taking advantage of the above characteristics, the dust collection performance of dust such as powder is configured to increase in the order of the fourth layer 304, the second layer 302, the first layer 301, and the third layer 303. In addition, the flow resistance when air passes through the filter increases in the order of the fourth layer 304, the second layer 302, the third layer 303, and the first layer 301 (the charge filter of the third layer). The flow resistance is lower than the flow resistance of the porous film made of polytetrafluoroethylene in the first layer).

  By configuring in this way, it is possible to improve the dust releasability of the folding filter 112, and also the dust collection performance is high, and the porous film of polytetrafluoroethylene used for the first layer is frictional due to the characteristics of the resin. Since the resistance is very small and the frictional resistance with the dust collected by the first layer is small, the dust releasability is very good. Moreover, the flow resistance when the whole air flows can be reduced. Accordingly, dust is easily peeled when the frustration filter 112 is vibrated, so that clogging of the filter is suppressed and a high suction force can be maintained for a long time.

  Furthermore, by forming the fourth layer 304 and the second layer 302 to be smaller than the thicknesses of the first layer and the third layer, the entire thickness can be reduced while maintaining the strength. When the first layer and the third layer are thickened, the strength increases. However, since the strength of the second layer and the fourth layer is large, the overall strength is not significantly affected.

  In addition, the reinforcement part 166 is not provided over all mountain parts, but is provided only in the vicinity of the part which the dust removal spring 170 of the dust removal apparatus 164 contacts. Thereby, the vibration to the folding filter 112 provided by the dust removal spring 170 is easily transmitted to the entire folding filter 112, so that the dust removal performance can be improved. Further, even if the reinforcing portion 166 is extended to one end of the peak portion, for example, in this embodiment, the dust removal performance may be slightly reduced. Moreover, since the plastic reinforcement part 166 is provided in the peak part of the mountain downstream of the folding filter 112, the fall of the effective area of a filter can be suppressed and the increase in flow resistance can be prevented. Furthermore, since the filter side does not escape when the frustration filter 112 is rubbed by using a brush (not shown) when cleaning the frustration filter 112, the cleanability can be improved.

In addition, rubbing the folding filter 112 with a brush in this way may damage the porous film of the polytetrafluoroethylene having low strength of the material itself, but the dust collecting performance of the first layer 301 is reduced due to the damage. In addition, since the dust collection performance of the charging filter of the third layer 303 is set high, an effect of suppressing a decrease in the dust collection performance of the entire folding filter 112 can be obtained. In particular, if the dust collection performance of the charging filter is increased, even if the porous film of polytetrafluoroethylene is partially broken, the state of high dust collection performance can be maintained. Further, the folding filter 112 can be washed with the cyclone separating cylinder 104 and the dust collecting case 105 with water. At this time, the amount of moisture reaching the charge filter layer is also reduced by the layers on the both sides of the charge filter (the first layer 301, the second layer 302, and the fourth layer 304). The effect that the fall of can be suppressed is also acquired.

  Furthermore, since the fibers are joined to each other in the charge filter, even if a large force is applied to the charge filter occasionally when rubbed with water or with a brush, even if the thin fibers are partially broken, the break is partially broken. Therefore, the filter does not have a large hole and the dust collection performance is almost maintained.

  Further, the filter frame 163 is provided with arc-shaped guides 165 at two screws at both ends thereof, and a dust removing device 164 is rotatably screwed to a fulcrum 167 at the upper part of the filter frame 163, and its lower end The portion is sandwiched between the guides 165. Dust is removed by moving the dust remover in the left-right direction with the hand-held part at the approximate center of the dust remover 164.

A dust removing spring 170 is attached to the dust removing device 164, and by moving the dust removing device 164 left and right, the lower portion of the dust removing spring 170 in the drawing sequentially collides with the reinforcing portion 166 of the folding filter 112, and the dust removing spring 170. It is deformed in the rotation direction around the axis of the shaft, and rides on the reinforcing part 166 of the frustrated filter 112, passes over the reinforcing part 166 and collides with the next mountain, thereby giving vibration to the frustrated filter 112. The dust adhering to the folding filter 112 is peeled off by vibration, passes through the peaks of the folding filter 112, the dust falls downward, and is a pocket below the dust collecting case 105 and below the communication passage 145. 162 falls and accumulates dust here. The lower part of the folding filter 112 is upstream and downstream of the airtight frame 172 by a filter frame 163 and is separated by a frame, and further upstream from the airtight frame 172 in a mountain shape. A protrusion is provided, and this is integrally formed with the lower end portion of the folding filter 112. Therefore, the lower end of the folded filter 112 is open downward, so that the dust that has peeled off from the filter surface reaches the lower part through this gap.

  In addition, the lower end part of the folding filter 112 is installed so that it may become above the lower end part of the filter frame 140, and it is easy to transfer refuse to the pocket 162 side. When throwing away the dust, hold the handle 123 above the dust collection case 105, lift the dust collection case 105, push the lever 142 downward, open the filter frame 140 and the filter frame 163, and remove the dust in the dust collection case 105. Dust in the pocket 162 can be thrown away. At this time, the dust remover 164 is moved to remove dust from the folding filter 112 and put into the lower pocket 162 before throwing away the dust. In addition, the dust removal operation may be performed after throwing away the dust. In this case, the dust that has fallen on the pocket inlet side is caused by the vortex of the secondary flow formed at the pocket 162 inlet by the airflow flowing through the cyclone outlet 146. While being conveyed to the back of the pocket 162, it is possible to prevent the dust from rising. Since the dust has a mass, the dust is moved away from the vortex by the inertia, and the dust is accumulated from the back.

  Also, during actual cleaning, when the cleaner is moved before and after cleaning, an impact is applied to the cleaner body 1 and dust is peeled off from the frustrated filter 112, but this has fallen to the lower side. Sometimes, as described above, it is conveyed to the pocket 162 at the time of the next cleaning or the like. Therefore, even if the dust remover 164 is not attached, the provision of the pocket 162 can suppress the re-scattering of the dust peeled off from the filter surface, so that the effect of providing the pocket 162 can be obtained. The pocket 162 is below the communication passage 145. However, by providing a depth in a direction away from the folded filter 112, the amount of dust can be accommodated without increasing the height dimension. Can be increased.

The mesh filter 106 can be cleaned by taking out the brush stopped on the lower surface of the dust collecting case 105 and rubbing the surface or washing it with water. The folding filter 112 can be cleaned by rubbing the filter surface with the filter frame 140 and the filter frame 163 opened. Moreover, it can carry out by rubbing the surface of the folding filter 112 using a brush, including the dust collection case 105, washing with water.

  In addition, if the filter frame 140 and the filter frame 163 can be rotated around the same opening / closing shaft 143 and each cannot be removed individually, the filter frame 140 and the filter frame 163 may be lost. No.

  Further, when the antistatic treatment is applied to the mesh filter 106, dust attached to the mesh filter 106 is easily separated and cleaning can be easily performed. Furthermore, when water-repellent treatment is performed, drying becomes faster when washed with water.

  The partition wall between the communication passage 145 and the pocket 162 is not airtight with the filter frame 140. This is to make it easier for dust that has been peeled off from the folding filter 112 during dust removal to be stored in the pocket.

  The filter frame 163 has an airtight frame 172 integrated on the outer peripheral side thereof, and is in contact with a filter case 113 that houses the folding filter 112 provided in front of the electric blower 107 while maintaining airtightness. The airtight frame 172 is provided so that the upper side of the dust collecting case 105 is tilted so that the upper side of the dust collecting case 105 is collapsed to the electric blower 107 side instead of the vertical direction when the dust collecting case 105 is housed in the cleaner body 1. When the case 105 is pushed into the main body of the cleaner, the airtightness is easily removed. Furthermore, since the sealing material made of an elastic body is attached before and after the airtight frame 172 of the filter frame 163 so as to be airtight with the filter 140, an effect that the number of seal members can be reduced is also obtained. It is done.

  The above uses a dust collection mechanism by the action of centrifugal force inside the cyclone separation cylinder 105, but there is no cyclone separation cylinder, and the dust collection case 104 forms a wide space in which a mesh filter 106 and a folding filter are provided. Since the function of the frustration filter 112 does not change even with a simple configuration with 112 attached, the same effect can be obtained.

  Furthermore, although the dust remover 164 is moved by hand, the dust remover 164 may be moved when the user pulls the cord or may be driven by a motor. In addition, the filter frame 163 can be removed from the dust collecting case 105, and the frustration filter 112 is vibrated by hitting it against a hard floor surface. Therefore, even if there is no dust removal mechanism, a similar effect can be expected when there is a dust removal mechanism.

  When the four layers of the folding filter 112 are joined, heat may be applied to weld the respective layers.

  Another embodiment will be described with reference to FIG. Since other configurations are the same as those of the first embodiment, only the unique ones will be described here.

  A cross-sectional configuration of the folding filter 112 is shown in FIG. The folding filter 112 is composed of four layers. When viewed from the upstream side, the first layer 301 is a polytetrafluoroethylene nonwoven fabric, the second layer 302 is a nonwoven fabric in which polyethylene and polyethylene terephthalate are mixed, and the third layer 303 Is a charging filter charged with a nonwoven fabric, and the fourth layer 304 is a polyethylene terephthalate nonwoven fabric. The first layer and the second layer are attached by adhesion. Both the third layer and the fourth layer are attached by adhesion.

  Here, the charge filter is a dielectric filter in which each filter fiber is charged and permanently polarized, and is added with a dust collection mechanism by electrostatic force obtained by charging. High dust collection efficiency can be obtained with low pressure loss compared to filters. In particular, in this embodiment, a nonwoven fabric made by a melt blow manufacturing method in which melted superfine fibers of a thermoplastic resin are extruded and spun and blown by an air flow and self-adhered in a sheet shape is used. Polypropylene is used as the dielectric, the fiber diameter is several μm, and the size of the gap between the fibers is also several μm. This type of charging filter increases dust collection performance when the amount of fibers used, so-called basis weight, is increased, but it also tends to increase the pressure loss when air passes through it. Since it can increase the electrostatic force, it has the feature that the dust collection performance can be improved without increasing the pressure loss of the flow.

On the other hand, the non-woven fabric used for the second layer and the fourth layer has a fiber diameter of several tens of μm and a large fiber diameter, so the strength is significantly higher than the first layer and the third layer. Since the space between them is as wide as several tens of μm, the dust collection performance of fine dust is remarkably low, and the pressure loss when air passes is small.

  On the other hand, the polytetrafluoroethylene non-woven fabric of the first layer 301 has a fiber diameter of 0.1 to 10 μm or less, and the pore size is also about 0.1 to 10 μm. It is made by a melt blow manufacturing method in which ultra-fine fibers are extruded and spun, blown by an air current, and self-adhered into a sheet. Polytetrafluoroethylene is very slippery. For example, dust that has reached the nonwoven fabric is easily removed from the holes of the nonwoven fabric, and therefore has a property that the dust is easily peeled off when the nonwoven fabric vibrates. Further, if the hole diameter is increased or the amount of fibers is decreased, the dust collecting performance is lowered, but the flow resistance can be reduced. However, since dust is mechanically collected, the flow resistance tends to increase with the same flow resistance as compared with the charge filter.

  In this embodiment, taking advantage of the above characteristics, the dust collection performance of dust such as powder is configured to increase in the order of the fourth layer 304, the second layer 302, the first layer 301, and the third layer 303. In addition, the flow resistance when air passes through the filter is set to increase in the order of the fourth layer 304, the second layer 302, the third layer 303, and the first layer 301. By configuring in this way, it is possible to improve the dust releasability of the folding filter 112, and also the dust collection performance is high. The polytetrafluoroethylene nonwoven fabric used for the first layer has a frictional resistance due to the characteristics of the resin. Since it is very small and the frictional resistance with the dust collected by the first layer is small, the dust releasability is very good. Moreover, the flow resistance when the whole air flows can be reduced. Accordingly, dust is easily peeled when the frustration filter 112 is vibrated, so that clogging of the filter is suppressed and a high suction force can be maintained for a long time.

  Furthermore, by forming the fourth layer 304 and the second layer 302 to be smaller than the thicknesses of the first layer and the third layer, the entire thickness can be reduced while maintaining the strength. When the first layer and the third layer are thickened, the strength increases. However, since the strength of the second layer and the fourth layer is large, the overall strength is not significantly affected.

1 is an external perspective view of a vacuum cleaner according to an embodiment of the present invention. It is an external appearance perspective view of the cleaner body 1 in the state where the upper lid 102 is opened. It is the horizontal top view which removed the upper cover and upper case in the vacuum cleaner shown in FIG. It is a schematic diagram which shows the flow of air. It is sectional drawing of a dust collection part. It is a cross-sectional view of a dust collection part. It is the figure which looked at the dust collection part from the back. It is a schematic diagram showing the cross section of a filter.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Vacuum cleaner main body, 101 ... Lower case, 102 ... Upper lid, 104 ... Cyclone separation cylinder, 105 ... Dust collection case, 106 ... Mesh filter, 107 ... Electric blower, 112 ... Frustration filter, 115 ... Inlet pipe, 117 ... Communication port, 120 ... exhaust port, 131 ... inner cylinder, 140, 163
DESCRIPTION OF SYMBOLS ... Filter frame, 150 ... Upper case, 162 ... Pocket, 164 ... Dust removal device, 166 ... Reinforcement part, 301 ... 1st layer, 302 ... 2nd layer, 303 ... 3rd layer, 304 ... 4th layer.

Claims (8)

A vacuum cleaner main body incorporating an electric blower, a dust collecting portion provided in the vacuum cleaner main body, a suction port connected to the vacuum cleaner main body via a hose, and dust provided on the downstream side of the dust collecting portion. In a vacuum cleaner having a filter part for collecting dust,
The filter unit, the porous film made of polytetrafluoroethylene first layer arranged to porous film from an upstream side composed of the polytetrafluoroethylene, nonwoven, charging filter, a four-layer structure in which the order of the non-woven fabric ,
A vacuum cleaner characterized in that the flow resistance of the charging filter is lower than the flow resistance of the porous film made of polytetrafluoroethylene . A vacuum cleaner main body incorporating an electric blower, a dust collector provided in the vacuum cleaner main body, a suction port connected to the cleaner main body via a hose, and dust provided downstream of the dust collector. In a vacuum cleaner having a filter part for collecting dust,
The filter unit, the porous film made of polytetrafluoroethylene first layer arranged, comprising the polytetrafluoroethylene from the upstream side porous membrane, higher strength than the porous film nonwovens, charging filter, the A four-layer structure arranged in the order of a nonwoven fabric with higher strength than the porous membrane,
A vacuum cleaner characterized in that the flow resistance of the charging filter is lower than the flow resistance of the porous film made of polytetrafluoroethylene . In claim 1 or 2,
A vacuum cleaner characterized in that the dust collection performance of the charging filter is higher than the dust collection performance of the porous film made of polytetrafluoroethylene. A vacuum cleaner main body incorporating an electric blower, a dust collector provided in the vacuum cleaner main body, a suction port connected to the cleaner main body via a hose, and dust provided downstream of the dust collector. In a vacuum cleaner having a filter part for collecting dust,
The filter part has a four-layer structure in which a non-woven fabric made of polytetrafluoroethylene is arranged in the first layer, and the non-woven fabric made of polytetrafluoroethylene, a non-woven fabric, a charging filter, and a non-woven fabric are arranged in this order from the upstream side.
A vacuum cleaner characterized in that the flow resistance of the charging filter is lower than the flow resistance of the non-woven fabric made of polytetrafluoroethylene. A vacuum cleaner main body incorporating an electric blower, a dust collector provided in the vacuum cleaner main body, a suction port connected to the cleaner main body via a hose, and dust provided downstream of the dust collector. In a vacuum cleaner having a filter part for collecting dust,
The filter unit is a non-woven fabric made of polytetrafluoroethylene disposed in the first layer, the non-woven fabric made of polytetrafluoroethylene from the upstream side, the non-woven fabric made of polytetrafluoroethylene higher in strength than the non-woven fabric made of polytetrafluoroethylene, the charging filter, With a four-layer structure constructed in the order of a non-woven fabric that is stronger than a non-woven fabric made of polytetrafluoroethylene,
A vacuum cleaner characterized in that the flow resistance of the charging filter is lower than the flow resistance of the non-woven fabric made of polytetrafluoroethylene. In claim 4 or 5,
A vacuum cleaner characterized in that the dust collection performance of the charging filter is higher than the dust collection performance of the non-woven fabric made of polytetrafluoroethylene. In any one of Claims 1 thru | or 6,
An electric vacuum cleaner characterized in that the filter part has a frustrated shape. In any one of Claims 1 thru | or 7,
An electric vacuum cleaner provided with dust removing means for removing dust from the filter portion.

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