JP4313812B2 - Electric vacuum cleaner - Google Patents

Description

  The present invention relates to a vacuum cleaner that can clean exhaust from an electric blower.

2. Description of the Related Art In recent years, various techniques for purifying air discharged from a vacuum cleaner to the outside have been adopted due to an increase in health consciousness. For example, there has been proposed a vacuum cleaner in which a filter unit is provided at an outlet of exhaust discharged from an electric blower mounted on the vacuum cleaner and an electric dust collector is provided between the electric blower and the filter unit ( Patent Document 1).
JP-A-4-341228 (FIG. 2)

  However, electrostatic dust collection has poor dust collection efficiency, and it is necessary to provide a large number of discharge electrodes in order to increase the dust collection efficiency. Moreover, as described in Patent Document 1, a combination of an electrostatic precipitator and a filter unit is not sufficient in dust collection efficiency, and further improvement in dust collection efficiency has been desired.

  This invention solves the said conventional problem, and makes it a subject to provide the vacuum cleaner which can aim at the further improvement of dust collection efficiency.

  The present invention includes an electric blower, a HEPA filter that allows exhaust from the electric blower to pass through, a discharge electrode that generates charges that adsorb dust contained in the exhaust from the electric blower, and an exhaust outlet of the electric blower. And an inner case that constitutes a closed space that closes between the HEPA filter and the HEPA filter, and the discharge electrode is disposed in the closed space.

  According to the present invention, the dust collection efficiency is further improved by combining the electrostatic dust collection by the discharge electrode and the HEPA filter, and further, the dust collection efficiency by the electrostatic dust collection is further improved by providing the discharge electrode in the closed space. It will be even higher.

  ADVANTAGE OF THE INVENTION According to this invention, the vacuum cleaner which can aim at the further improvement of dust collection efficiency can be provided now.

  FIG. 1 is an external perspective view showing the electric vacuum cleaner of the present embodiment, where (a) is viewed from an oblique front, (b) is viewed from an oblique rear, and FIG. 2 is an electric vacuum cleaner of the present embodiment. FIG. 3 is a perspective view showing the inner case and other main parts, FIG. 4 is a partial cross-sectional view taken along line AA in FIG. 1A, and FIG. 5 is a cross-sectional view taken along line BB in FIG. FIG. 6 is a perspective view showing the inside of the inner case, FIG. 7 is a cross-sectional view of the HEPA filter, and FIG. 8 is an external perspective view when the back cover is removed. Note that the vacuum cleaner 1 of the present embodiment is of a paper pack type.

  As shown in FIGS. 1 (a) and 1 (b), the vacuum cleaner 1 of the present embodiment has a case main body 2, the rear wheels 3 and 3 on both sides of the rear portion of the case main body 2, and the hose at the front end portion. Hose connection part 4 for connecting the power source, handle 5 and power cord take-up button 6 on the upper side, side outlets 7 and 7 on both sides, outlet 8 on the rear side (see FIG. 1 (b)), etc. It is configured. A front wheel 9 is provided on the bottom surface of the case body 2 (see FIG. 5).

  The case main body 2 constitutes the appearance of the lower half of the vacuum cleaner 1, the upper case 2b constituting the appearance of the rear part of the upper half, and the appearance of the front part of the upper half and is opened and closed An openable / closable cover 2c, an upper surface cover 2d that is attached to the surface of the upper case 2b to form an upper surface, and a back cover 2e that is attached to the surface of the upper case 2b to form an outer surface of the rear surface 2e ( 1 (b)). As shown in FIG. 8, a discharge port 2b1 formed of a plurality of holes penetrating in the vertical direction is formed on the back surface of the upper case 2b, and an upward direction is formed inward (front) of the discharge port 2b1. And wall part 2b2 extended in the width direction is formed. FIG. 8 shows a state where the back cover 2e is removed and the back surface of the upper case 2b is exposed.

  As shown in FIG. 2, in the vacuum cleaner 1, the inner case 10 and the cord reel 20 are accommodated side by side in the width direction at the rear part in the case body 2. A dust collection chamber 11 (see FIG. 6) is provided at the front of the case body 2, and a replaceable paper pack P (see FIG. 6) is mounted in the dust collection chamber 11. ing. The cord reel 20 is configured by being supported by the case body 2 so that the reel portion 21 has a rotation axis in the width direction, and a power cord 22 having a predetermined length is wound around the reel portion 21.

  As shown in FIG. 3, the inner case 10 is formed in a substantially square box shape with synthetic resin or the like, and an electric blower 30 to be described later is accommodated in the inner case 10, and a HEPA (High Efficiency Particulate Air) filter 40 is attached. It has become.

  As shown in FIG. 4, the electric blower 30 includes a fan 32 and an electric motor 33 housed in a metal motor case 31, and the output shaft 33a of the electric motor 33 provided on the rear side with the fan 32 facing forward. It is configured to be connected to. The motor case 31 includes a large-diameter portion 31a (see FIG. 5) in which a portion in which the fan 32 is accommodated is formed in a disk shape, and a small-diameter portion 31b in which the portion in which the electric motor 33 is accommodated is smaller than the large-diameter portion 31a. (See FIG. 5). Further, the electric blower 30 is provided with exhaust outlets 34 and 34 (see FIG. 5) for discharging the sucked air at the rear upper part and lower part in the drawing. The exhaust outlet 34 is not limited to two places, and may be provided at one place or at three or more places.

  The inner case 10 accommodates the electric blower 30 and has a main body part 10a whose front and upper surfaces are open, a front end outer peripheral part 10b that is formed of an elastic member and engages with the large diameter part 31a, and a large diameter part 31a. And a front surface portion 10c covering the front surface. A suction port 10d for sucking the exhaust gas that has passed through the dust collection chamber 11 (see FIG. 6) is formed at the center of the front surface portion 10c.

  Further, as shown in FIG. 5, the inner case 10 has side surfaces 10a1, 10a2 and a bottom surface 10a3 in the width direction (left-right direction) of the main body 10a formed flat, and the left end, the right end, and the front end outer peripheral portion 10b. It is formed so as to be located inside the lower end. Further, the side surface 10a1 and the bottom surface 10a3 are curved and the side surface 10a2 and the bottom surface 10a3 are respectively curved so as to follow the front end outer peripheral portion 10b. 5 shows a state where the fan 32 and the electric motor 33 are removed from the electric blower 30.

  In the inner case 10, as shown in FIG. 4, the large-diameter portion 31a of the motor case 31 is elastically supported so as to be fitted to the inner surface of the front end outer peripheral portion 10b, and the rear portion of the small-diameter portion 31b is interposed via the elastic member 36. The main body 10a is elastically supported. As described above, the airtightness between the inner case 10 and the electric blower 30 at the front portion of the inner case 10 is maintained by fitting the large diameter portion 31a of the motor case 31 with the front end outer peripheral portion 10b. A filter 37 is provided in the inner case 10 so as to surround the periphery of the electric motor 33.

  Further, as shown in FIG. 3, a pair of arms 10 t and 10 t extending rearward are integrally formed on both sides in the width direction of the back surface 10 a 4 of the inner case 10, and these arms 10 t and 10 t are formed on the case body 2. It is fixed by screwing (see FIG. 2).

  As shown in FIG. 6, a rectangular opening 10f is formed in the upper part of the inner case 10 (main body 10a), and a HEPA filter 40 is provided so as to cover the entire opening 10f. ing. In addition, the HEPA filter 40 shown in FIG. 6 has shown the state removed and turned over.

  As shown in FIG. 7, the HEPA filter 40 has a layer 41 coated with an antibacterial agent on the innermost layer (upstream side), a layer 42 made of a negatively charged non-woven fabric on the intermediate layer, and a strength on the outermost layer (downstream side). A three-layer structure of a layer 43 made of aggregate for giving is formed by being folded into a pleat shape. The laminated structure of the HEPA filter 40 is not limited to the embodiment of FIG.

  Further, as shown in FIG. 6, the HEPA filter 40 is disposed on the entire inner side of the frame body 10e formed of synthetic resin, so that the airtightness of the gap between the HEPA filter 40 and the frame body 10e is maintained. That is, it is attached via an adhesive or the like so that the exhaust from the electric blower 30 does not leak directly to the outside of the HEPA filter 40, in other words, is not discharged without passing through the HEPA filter 40. Further, four screw insertion holes 10e1 are formed on the outer surface of the frame body 10e, and the same number of screw holes 10f1 are formed on the outer surface of the main body portion 10a, and the frame is inserted through the screws 10g (see FIG. 4). The body 10e is detachably attached to the main body 10a.

  As shown in FIG. 4, a discharge electrode 50 is provided in the closed space S formed between the exhaust outlet 34 of the electric blower 30 and the HEPA filter 40.

  As shown in FIG. 6, the discharge electrode 50 is configured such that the brush-like electrode 51 and the plate-like electrode 52 are separated from each other by a predetermined distance. Further, the discharge electrode 50 is attached via a fixing portion 10 h provided in the inner case 10. The fixing portion 10h is formed in a substantially plate shape with a synthetic resin or the like, and is configured such that the discharge electrode 50 is located near the center of the opening 10f. In addition, the fixing portion 10 h is integrally formed with the fixing portion 10 h so that the shielding plate 10 h 1 is positioned below the discharge electrode 50 so that the exhaust does not directly hit the discharge electrode 50.

  Further, the discharge electrode 50 includes a cut-out groove formed in the opening edge portion of the main body portion 10a, with the brush-like electrode 51 connected to the lead wire 51a and the plate-like electrode 52 connected to the lead wire 52a, respectively. It is configured to extend to the outside of the inner case 10 through 10f2 and 10f2. Further, the main body 10a is provided with a seal member 38 along the inner peripheral edge of the opening 10f, and a seal member 39 is provided at a position overlapping the lead wires 51a and 52a of the edge 10e2 of the frame 10e. The airtightness at the connecting portion between the portion 10a and the frame body 10e is maintained, so that the exhaust from the electric blower 30 does not leak from the gap between the main body portion 10a and the frame body 10e or the cutout grooves 10f2 and 10f2. It has become.

  Thus, by providing the electric blower 30, the HEPA filter 40, and the discharge electrode 50 in the inner case 10, a space between the exhaust outlet 34 of the electric blower 30 and the HEPA filter 40 is closed by a part of the inner case 10. S (see FIG. 4), and all the exhaust from the exhaust outlet 34 is exhausted through the HEPA filter 40.

  As shown in FIG. 5, the vacuum cleaner 1 of the present embodiment has an exhaust passage Q1 formed between the left side surface 10a1 of the inner case 10 and the cord reel 20, and the right side surface 10a2 and the case body 2 An exhaust passage Q2 is formed between the bottom surface 10a3 and the case body 2, and an exhaust passage Q5 passing through the cord reel 20 is formed. As shown in FIG. An exhaust passage Q3 is formed between 10a4 and the case body 2.

  Further, as shown in FIG. 4, the HEPA filter 40 protrudes rearward from the electric blower 30, and as shown in FIG. 5, the HEPA filter 40 slightly protrudes toward the center in the width direction. As the HEPA filter 40 overhangs, the upper part of the inner case 10 (main body part 10a) has an inclined surface 10a5 (see FIG. 4) on the rear side with respect to the lower part. It is formed so as to have an inclined surface 10a6 (see FIG. 5) and a stepped portion 10a7 (see FIG. 5). By arranging the HEPA filter 40 so as to overhang in this way, the HEPA filter 40 can be increased in area, and the load on the electric motor 33 can be reduced. Note that the protruding direction of the HEPA filter 40 may be only rearward.

  Further, as shown in FIG. 5, the HEPA filter 40 is formed so as to incline downward from the center toward the right direction (side) in the figure. Similarly, the frame body 10e that supports the HEPA filter 40 is also formed so as to be inclined downward from the center toward the right side (side) in the figure.

  The discharge electrode 50 is connected to a high voltage generator 60 provided outside the inner case 10 as shown in FIGS. More specifically, as shown in FIG. 2, the high voltage generator 60 is provided between the back surface 10a4 of the inner case 10 (see FIG. 4) and the case body 2, and between the arm portion 10t and the arm portion 10t. Located between. Although not shown, the high voltage generator 60 is fixed to the case body 2 with screws.

  Moreover, the vacuum cleaner 1 of the present embodiment is configured by separately including the control board 70 and the motor control board 80.

  The control board 70 is a main board. For example, the control board 70 is controlled so as to generate a high voltage at the discharge electrode 50 during use, and is controlled so that various lamps such as a garbage disposal lamp are turned on when necessary. Further, as shown in FIG. 3, the control board 70 is vertically placed along the back surface 10 a 4 of the main body 10 a of the inner case 10, and is surrounded by the arm 10 t, the arm 10 t, and the high voltage generator 60. It is arranged so that it is located in the space.

  The motor control board 80 is a board that controls the rotation of the electric motor 33, and is mounted with a bidirectional semiconductor element (also referred to as a triac). More specifically, a bidirectional semiconductor element is used to change the phase angle of alternating current (phase control), change the current flowing to the motor 33, and control the rotation of the motor 33. The motor control board 80 is disposed horizontally along the bottom surface 10a3 of the inner case 10 (see FIGS. 4 and 5). Incidentally, a bidirectional semiconductor element is an element that becomes very hot during operation.

Next, the operation and effect of the vacuum cleaner 1 of the present embodiment will be described with reference mainly to FIGS. 4 and 5. In FIGS. 4 and 5, the flow of exhaust gas is indicated by a thick black solid line.
As shown in FIG. 4, when the motor 33 is driven by the control of the control board 70 and the motor control board 80 to rotate the fan 32, it passes through the dust collection chamber 11 from the suction port 10 d formed on the front surface of the inner case 10. Exhausted air is sucked in. The sucked exhaust gas flows rearward around the fan 32, passes through a gap between the motor case 31 and the electric motor 33, and is discharged from the exhaust outlets 34 and 34.

  The exhaust discharged from the exhaust outlet 34 is partly removed by the filter 37 and further passed through the HEPA filter 40 to further remove the dust. Further, since dust contained in the exhaust gas is originally positively charged, if the discharge electrode 50 is set to a high voltage state via the high voltage generator 60 under the control of the control board 70, the discharge electrode 50 is negatively charged. The positively charged dust and the positively charged dust are combined with the negative charge to form a larger positively charged dust, which is collected by the HEPA filter 40. Is done. That is, dust particles are formed by adsorbing dust particles to each other via negative charges by the discharge electrode 50, and dust collection efficiency can be increased. Thus, the dust collection efficiency in the HEPA filter 40 is improved by creating a lump of dust.

  Furthermore, as described above, since the negatively charged layer 42 is provided in the HEPA filter 40, positively charged dust is easily adsorbed to the HEPA filter 40, and dust collection efficiency is further enhanced. Furthermore, the space between the exhaust outlet 34 of the electric blower 30 and the HEPA filter 40 is a closed space S by the inner case 10, and all the exhaust discharged from the exhaust outlet 34 passes through the HEPA filter 40. As a result, the dust collection efficiency can be further increased. Furthermore, by providing the discharge electrode 50 in the closed space S, the charge and the dust are efficiently combined and the adsorption rate between the dusts is increased, so that it becomes easy to form a lump of dust, and the dust collection efficiency is further increased. It becomes possible. As described above, not only the combination of the HEPA filter 40 and the discharge electrode 50 but also the combination with the closed space S can further increase the dust collection efficiency.

  Moreover, in the vacuum cleaner 1 of this embodiment, as shown in FIG. 4, the exhaust gas that has passed through the HEPA filter 40 passes through the exhaust flow path Q3 formed between the back surface 10a4 of the inner case 10 and the case body 2. It passes through the exhaust passage Q4 formed between the bottom surface 10a3 and the case body 2. A part of the exhaust gas passing through the exhaust passage Q3 is discharged from the discharge port 8 formed in the back cover 2e through a discharge port 2b1 (see FIG. 8) formed in the upper case 2b.

  Further, as shown in FIG. 5, the exhaust gas that has passed through the HEPA filter 40 passes through an exhaust gas channel Q1 formed between the side surface 10a1 of the inner case 10 and the cord reel 20, and is exhausted in the cord reel 20. It is discharged from the discharge port 7 on the left side of the figure through Q5. The exhaust gas that has passed through the HEPA filter 40 sequentially passes through an exhaust channel Q2, an exhaust channel Q4, and an exhaust channel Q5 formed between the side surface 10a2 of the inner case 10 and the case body 2. A part of the exhaust gas passing through the exhaust flow path Q2 is exhausted from the exhaust port 7 on the right side of the figure.

  As described above, the exhaust gas that has passed through the HEPA filter 40 passes through the bottom surface 10a3 from the side surface (side surface 10a1, 10a2, back surface 10a4) of the inner case 10 and then exhausts to the outside through the cord reel 20. Since the flow paths Q1 to Q5 are formed, exhaust can be circulated uniformly in the rear part in the case main body 2, and efficient cooling becomes possible.

  Further, since the motor control board 80 is arranged on the bottom surface 10a3 of the inner case 10, not only the warmed exhaust gas passing through the control board 70 arranged in the exhaust flow path Q3 but also the warming gas passing through the exhaust flow paths Q1 and Q2. The motor control board 80 can be cooled also by the exhaust which is not performed. Therefore, the cooling efficiency of the motor control board 80 can be increased. Further, since the motor control board 80 is cooled by the exhaust passing through the three exhaust passages Q1, Q2, and Q3, the cooling efficiency is improved. Further, since the motor control board 80 including the bidirectional semiconductor element that is a high-temperature heating element is formed separately from the main control board 70 and disposed on the bottom surface 10a3 away from the control board 70, motor control is performed. The high-temperature exhaust heated by the substrate 80 does not flow back to the exhaust flow path Q3, and the cooling efficiency of the control substrate 70 is improved.

  In the present embodiment, the control board 70 and the motor control are arranged without adding cooling means separately by arranging the control board 70 in the exhaust flow path Q3 and the motor control board 80 in the exhaust flow path Q4. The substrate 80 can be cooled.

  By the way, in order to make the appearance look compact, it is required that the upper surface of the case body 2 is formed into an egg shape, that is, curved downward from the center in the width direction to the side. Therefore, in the vacuum cleaner 1 of the present embodiment, as shown in FIG. 5, the HEPA filter 40 is formed so as to be inclined downward from the center in the width direction toward the side (right side in the drawing). Since the flow passage cross-sectional area of the exhaust gas formed between the HEPA filter 40 and the case body 2 can be made uniform from one end to the other end in the width direction (left-right direction), It is possible to prevent the performance (performance of sucking garbage) from being impaired.

  Moreover, in the vacuum cleaner 1 of this embodiment, since the discharge electrode 50 is attached to the inner case 10, the attachment stability of the discharge electrode 50 can be improved.

  Moreover, in the vacuum cleaner 1 of this embodiment, the control board 70 is arrange | positioned along the side surface (back surface 10a4) of the inner case 10, and the motor control board | substrate 80 is arrange | positioned along the bottom face 10a3 of the inner case 10. Thus, the space can be used effectively.

  Moreover, in the vacuum cleaner 1 of this embodiment, since the high voltage generator 60 was arrange | positioned on the outer side of the inner case 10, the temperature rise of the high voltage generator 60 can be prevented and safety can be ensured. it can.

  Moreover, in the vacuum cleaner 1 of this embodiment, since the HEPA filter 40 has a negatively charged layer, it is possible to increase the collection rate of positively charged dust contained in the exhaust, and to collect the exhaust. Dust efficiency can be increased.

It is an external appearance perspective view which shows the vacuum cleaner of this embodiment, (a) is when it sees from diagonally forward, (b) is when it sees from diagonally back. It is a perspective view which shows the internal structure of the vacuum cleaner of this embodiment. It is a perspective view which shows an inner case and other main parts. It is AA fragmentary sectional drawing of Fig.1 (a). It is BB sectional drawing of FIG.1 (b). It is a perspective view which shows the inside of an inner case. It is sectional drawing of a HEPA filter. It is an external appearance perspective view when a back cover is removed.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electric vacuum cleaner 10 Inner case 10a1, 10a2 Side surface 10a3 Bottom surface 10a4 Back surface 20 Cord reel 30 Electric blower 40 HEPA filter 50 Discharge electrode 60 High voltage generator 70 Control board 80 Motor control board S Closed space

Claims (12)

An electric blower,
An exhaust cleaning filter that allows exhaust from the electric blower to pass through;
A discharge electrode composed of a brush-like electrode and a plate-like electrode, which generates a charge for adsorbing dust contained in the exhaust from the electric blower;
And the inner case constituting a closed space for closing between the exhaust spout before notate filter of the electric blower,
A high voltage generator for generating a high voltage at the discharge electrode;
A fixing portion that is formed in the inner case and that disposes the discharge electrode in the closed space;
A shielding plate that is formed in the fixed portion so that the exhaust from the electric blower does not directly hit the discharge electrode;
Lead wires respectively connected to the brush-like electrode and the plate-like electrode;
A seal member provided along the inner peripheral edge of the opening formed in the main body of the inner case,
The lead wire is configured to extend to the outside of the inner case through a notch groove formed in an opening edge portion of the main body portion,
The seal member is provided at a position overlapping the lead wires at the edge of the frame,
The high-voltage generator is disposed outside the inner case, and is disposed between a back surface of the inner case and a case body . The inner case is
The electric blower is accommodated so that exhaust is introduced from the front,
Before notated filter is vacuum cleaner according to claim 1, characterized in that it is configured to be placed in an upward above the electric blower.   An electric blower,
  An exhaust cleaning filter that allows exhaust from the electric blower to pass through;
  A discharge electrode for generating a charge that adsorbs dust contained in the exhaust from the electric blower;
  An inner case that constitutes a closed space that closes between the exhaust outlet of the electric blower and the filter;
  While disposing the discharge electrode in the closed space,
  In the inner case, the electric blower is accommodated so that exhaust is introduced from the front, and the filter is configured to be arranged upwardly above the electric blower. Machine. Claim the exhaust having passed through the pre-notated filter is, after passing through the bottom surface from the side of the inner case, through the cord reel, wherein the exhaust passage is configured to be discharged to the outside The vacuum cleaner according to any one of claims 1 to 3 . The vacuum cleaner according to any one of claims 1 to 4, wherein a control board is disposed on a back surface of the inner case. Separately from the control board, comprising a motor control board for controlling the rotation of the electric blower,
6. The electric vacuum cleaner according to claim 5 , wherein the motor control board is disposed on a bottom surface of the inner case. The pre-notated filter, vacuum cleaner according to any one of claims 1 to 6, characterized by being configured so as to be inclined from the width direction center downward toward the side. Before notated filter is vacuum cleaner as claimed in any one of claims 7, characterized in that it is arranged to protrude at least rearwardly. The vacuum cleaner according to any one of claims 3 to 8 , wherein the discharge electrode is attached to the inner case. The high-voltage generator for generating a high voltage to the discharge electrode, the electric vacuum cleaner according to any one of claims 9 claim 3, characterized in that it is disposed outside of the inner case. Before notated filter, the electric vacuum cleaner according to any one of claims 1 to 10, characterized in that it has a layer formed by negatively charged.   The vacuum cleaner according to any one of claims 1 to 11, wherein the filter is a HEPA filter.

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