JP2010082365A - Cleaner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cleaner which preventing discharge of carbon dust and dust, generated by a blower motor and attains simplification of maintenance. <P>SOLUTION: Disclosed is the cleaner constituted so that a suction passage 27 with suction port 27a is communicated with a blower case 30 via a dust collection chamber (dirty water tank) 28 and a blasting passage 29, and the dust collection chamber 28 is negative-pressured by a blower device 55 to suck and store dust etc. from the suction port 27 into the dust collection chamber 28 via the suction passage 27, and working air is cleaned by filters 62, 63 in the blower case 30 and discharged outside, wherein a motor housing chamber 33A to guide in outer air to cool a blower motor 59 is communicated with the blasting passage 29 by a cooling air duct 51. Carbon dust and dust, generated by the blower motor 59 are sucked into the blower case 30 with cooling air via the cooling air duct 51 and the blasting passage 29 and cleaned by the filters 62, 63. Thus the carbon dust and dust can be prevented from being discharged outside. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a cleaning device, and in particular, a suction channel provided with a suction port communicates with a blower case provided with a blower device via a dust collecting chamber, and dust is collected from the suction port via the suction channel by the blower device. The present invention relates to a cleaning device that sucks and accommodates in a dust chamber.

  Generally, the cleaning device is configured to accumulate dust sucked by a blower device from a suction port in a dust collection chamber. As this type of cleaning device, there is, for example, Patent Document 1. This cleaning device is provided with a blower case connected to a dust collection chamber having an opening of a suction port via a throttle cylinder, a blower fan that is rotationally driven by a blower motor in the blower case, and a coarse dust filter and A dust collecting case is disposed to swingably support the filter housing case on which the fine dust filters are superimposed, and a disposable bag-shaped filter, that is, a dust collecting bag is provided in the dust collecting chamber.

  With this configuration, the working air containing dust sucked from the suction port is guided to the dust collecting chamber and introduced into the dust collecting bag, and the dust is collected by the dust collecting bag, and the filter disposed in the dust collecting case. Coarse dust and fine dust that have passed through the dust bag while passing through the coarse dust filter and fine dust filter in the storage case are collected, and the working air passes through the motor and is discharged outside the machine. Is done.

  On the other hand, when cleaning a clean room where the cleanliness of air is controlled, such as a pharmaceutical company's dispensing area, hospital, semiconductor factory, etc., if a lot of fine dust is discharged from the cleaning device, the environment of the clean room will be deteriorated. There is a self-propelled cleaning device that minimizes the amount of dust discharged because it causes quality problems due to cross-contamination between drugs.

  As schematically shown in FIG. 9, this cleaning device is a cleaning liquid means for spraying a cleaning liquid from a cleaning liquid tank provided in a self-propelled cleaning device main body through a nozzle 101 to the floor surface, and a rotating brush for polishing the floor surface. 102 and the squeegee 103 are arranged in order from the front to the rear. Further, the squeegee 103 has a sewage tank 105 communicating with a suction channel 104 having a suction port 104a opened therein, and a blower case 108 communicating with the sewage tank 105 via an air flow channel 106. A blower device 109 including a fan 109a and a blower motor 109b is provided, and a prefilter 111 and a HEPA filter 112 capable of collecting particulate dust are interposed between the air flow path 106 and the blower device 109. The blower motor 109b accommodated in the blower case 108 is cooled by the cooling air introduced into the blower case 108 through the air inlet 110a that opens to the blower case 108 and discharged from the outlet 110b.

  The self-propelled cleaning device configured as described above sprays the cleaning liquid in the cleaning liquid tank from the nozzle 101 as the vehicle travels, polishes the floor surface with the rotating brush 102 that rotates in the presence of the cleaning liquid, and blowers The apparatus 109 applies a negative pressure to the inside of the sewage tank 105, and the cleaning liquid on the floor surface is sucked into the sewage tank 105 through the suction passage 104 together with air, that is, working air, and collected. The working air sucked from the sewage tank 105 by the blower device 109 and sucked into the blower case 108 and discharged to the outside from the discharge port 108a is collected with dust and the like by the prefilter 111, and further, a HEPA filter (High Efficiency Particulate Air). Filter) 112 collects particulate dust, and clean air with very little mixed dust is discharged from the outlet 108a.

  Further, in Patent Document 2, the blower case is partitioned into a blower fan chamber in which a blower fan is disposed and a sealed blower motor chamber in which a blower motor is disposed. There has been proposed a blower case of a cleaning device that accumulates dust generated by wear or the like in a blower motor chamber to prevent discharge to the outside.

JP-A-10-234630 JP 2008-154634 A

  According to Patent Document 1, dust collected from the suction port is collected in a dust collection bag in the dust collection chamber and further collected while passing through the coarse dust filter and the fine dust filter in the filter housing case. After the coarse dust and fine dust that have passed through the bag are collected, the working air passes through the inside of the motor and is discharged to the outside.

  However, since the working air in which dust is collected by the coarse dust filter and fine dust filter passes through the motor and is discharged to the outside of the machine, it is generated due to wear of rotating parts inside the motor by driving the motor. There is a concern that the dust to be discharged to the outside together with the working air.

  On the other hand, according to the cleaning device shown in FIG. 9, the working air sucked into the blower case 108 by the blower device 109 collects dust and the like by the prefilter 111, and further collects particulate dust by the HEPA filter 112. The working air thus discharged is discharged from the discharge port 108a.

  However, since the blower motor 109b accommodated in the blower case 108 is cooled by the cooling air introduced into the blower case 108 from the air inlet 110a that opens to the blower case 108 and discharged from the outlet 110b, the drive of the blower motor 109b is driven. There is a concern that the brush dust generated by the above, that is, the carbon dust or the dust generated due to the wear of the rotating part inside the motor or the like is discharged to the outside together with the cooling air from the air outlet 110b.

  Further, according to Patent Document 2, carbon dust generated by driving the blower motor and dust generated due to wear of the rotating part or the like accumulate in the blower motor chamber, thereby preventing discharge of carbon dust and dust to the outside. However, there is a concern about the influence on the blower motor due to carbon dust or the like accumulated in the blower motor chamber, and maintenance is required to remove the carbon dust and dust accumulated in the blower motor chamber.

  Accordingly, an object of the present invention made in view of such a point is to provide a cleaning device that can prevent discharge of carbon dust and dust generated by a blower motor and can simplify maintenance.

  The invention of the cleaning device according to claim 1, which achieves the above object, includes a suction passage having a suction port communicated with a blower case via a dust collection chamber and a ventilation passage continuing to the dust collection chamber, A blower device equipped with a blower fan disposed in the blower case and a blower motor that rotationally drives the blower fan sucks the working air into the blower case to negatively pressure the dust collection chamber, and dust is sucked from the suction port. In the cleaning device that sucks and accommodates the dust in the dust collection chamber through the passage and cleans the working air with a filter disposed in the blower case and discharges it outside, the blower device includes a blower motor housing that houses a blower motor, The present invention is characterized in that outside air is introduced into the blower motor housing to cool the blower motor, and the cooling air that has cooled the blower motor is sucked into the blowing passage.

  According to the present invention, the outside air is introduced into the blower motor housing of the blower device to cool it, and the cooling air that has cooled the blower motor is sucked into the blower flow path so that the carbon dust generated by the blower motor drive and the wear of the rotating part are absorbed. The dust generated by the air can be sucked into the blower case together with the cooling air through the air flow path and cleaned by the filter, and the dust, carbon dust and the like can be prevented from being discharged to the outside.

  In addition, carbon dust generated by driving the blower motor and dust generated by wear of the rotating part do not accumulate in the blower motor and the blower motor housing, and the maintenance work can be simplified.

  According to a second aspect of the present invention, there is provided a blower fan disposed in the blower case and a blower motor for rotationally driving the blower fan, wherein the suction flow path having the suction port communicates with the blower case via the dust collection chamber. The blower device is equipped to suck the working air into the blower case to create a negative pressure in the dust collecting chamber, so that dust is sucked into the dust collecting chamber from the suction port through the suction passage, and the working air is put into the blower case. In the cleaning device for cleaning with a disposed filter and discharging to the outside, the blower device includes a blower motor housing that houses a blower motor, introduces outside air into the blower motor housing, cools the blower motor, Cooling air that has cooled the blower motor is sucked into the blower case upstream of the filter.

  According to the present invention, the outside air is introduced into the blower motor housing of the blower device to cool it, and the cooling air that has cooled the blower motor is sucked into the blower flow path so that the carbon dust generated by the blower motor drive and the wear of the rotating part are absorbed. It is possible to prevent the dust generated by the air from being sucked into the blower case together with the cooling air and cleaned by the filter, and the dust, carbon dust and the like can be prevented from being discharged to the outside.

  In addition, carbon dust generated by driving the blower motor and dust generated by wear of the rotating part do not accumulate in the blower motor and the blower motor housing, and the maintenance work can be simplified.

  According to a third aspect of the present invention, there is provided a blower disposed in the blower case, wherein an intake passage having a suction port communicates with the blower case via a dust collection chamber and a ventilation passage continuing to the dust collection chamber. The blower device having a fan and a blower motor that rotationally drives the blower fan sucks the working air into the blower case and negatively pressures the dust collection chamber, and the dust is collected from the suction port through the suction passage. In the cleaning device that sucks and accommodates in the chamber and cleans the working air with a filter arranged in the blower case and discharges it to the outside, the blower motor is formed by partitioning the blower case and introducing the outside air to the blower motor A blower motor chamber that cools the blower motor, and a cooling air duct that communicates the blower motor chamber with the air flow passage to suck the cooling air that has cooled the blower motor into the air flow passage. Characterized in that was.

  According to the present invention, dust and carbon dust can be obtained with a simple configuration in which the motor housing chamber in which the blower motor of the blower apparatus is housed and the air flow passage are communicated by the cooling air duct and the cooling air that has cooled the blower motor is sucked into the air flow passage. Etc. can be prevented from being discharged to the outside. In addition, carbon dust generated by driving the blower motor and dust generated by wear of the rotating part are carried out of the blower motor housing together with the cooling air, and do not accumulate in the blower motor housing or the motor housing chamber. Use can be ensured, and maintenance work can be simplified.

    According to a fourth aspect of the present invention, in the cleaning apparatus according to any one of the first to third aspects, the filter includes a plurality of filters including a HEPA filter.

  According to the present invention, since the HEPA filter capable of collecting particulate dust is provided, fine dust, carbon dust, and the like are reliably collected, and fine dust, carbon dust, and the like are discharged to the outside. It can be surely prevented.

  According to the present invention, the blower motor of the blower device is cooled by introducing outside air, and the cooling air that has cooled the blower motor is sucked into the air flow path, thereby generating carbon dust generated by driving the blower motor and wear of the rotating part. The dust to be sucked together with the cooling air is sucked into the blower case through the air flow path and is cleaned by the filter, and the dust, carbon dust and the like can be prevented from being discharged to the outside.

  Hereinafter, an embodiment of a cleaning device according to the present invention will be described with reference to FIGS. 1 to 8, taking a self-propelled cleaning device as an example.

  1 is a front view of the self-propelled cleaning device 1, FIG. 2 is a side view of the self-propelled cleaning device 1, FIG. 3 is a bottom view of the self-propelled cleaning device 1, and FIG. It is a perspective view which shows roughly arrangement | positioning of an internal structure.

  The self-propelled cleaning device 1 includes a traveling device 10 that travels on a floor surface to be cleaned while detecting and avoiding an obstacle or the like in a cleaning range, and a cleaning device 20 that cleans the floor surface.

  The traveling device 10 is provided at the lower part of the main body 2 and, as shown in FIGS. 1 to 4, a pair of traveling driving wheels 11 provided on the left and right of the center position in the front-rear direction, and the front and rear, respectively. A front caster 12 and a rear caster 13 that are swingable in accordance with the traveling of the cleaning device 1 are provided. The left and right drive wheels 11 are connected to a drive motor 14 via a speed reducer as shown in FIG. The traveling steering of the self-propelled cleaning device 1 is performed by the difference in the number of rotations of the left and right drive wheels 11, and the direction change is performed by rotating the left and right drive wheels 11 in the opposite directions. In addition, an obstacle sensor 15 that detects an obstacle in the forward direction and the left-right direction is provided at a front position of the front caster 12, and an obstacle sensor 16 that detects an obstacle on the side of the vehicle body is provided at a rear position of the rear caster 13. Provide.

  Next, the cleaning device 20 will be described with reference to FIGS. 1 to 4 and FIG.

  The cleaning device 20 is rotated by a brush motor 24 behind the cleaning liquid spraying means 21 for spraying the cleaning liquid stored in the cleaning liquid tank 22 to the floor surface from the nozzle 23 arranged at the lower part of the self-propelled cleaning apparatus 1. Three rotary brushes 25 that are driven to polish the floor surface, and a squeegee portion 26 that sucks cleaning liquid containing dust on the floor surface together with the working air are sequentially arranged from the front to the rear. As shown in FIGS. 3 and 4, the squeegee portion 26 is provided with a rubber wiper portion 26 b in contact with the floor surface at the lower end of the squeegee main body 26 a that is curved in a substantially semicircular arc shape at the rear lower position of the self-propelled cleaning device 1. The suction passage 27 has a suction port 27a opened in front of the central portion of the wiper portion 26b.

  The suction flow path 27 is connected to a sewage tank 28 serving as a dust collection chamber, and a blower case 30 is continuously formed in the sewage tank 28 via a blower flow path 29. A blower fan housing 57 for accommodating a blower fan 58 formed in the blower case 30 with a relatively large diameter and a blower motor housing 56 for accommodating a blower motor 59 formed in a relatively small diameter for rotationally driving the blower fan 58 are unitized. The blower device 55 is accommodated. A cooling air introduction port 56a that cools the blower motor 59 through the cooling air flow path formed in the blower motor 59 is opened on the rear surface of the blower motor housing 56, and the cooling air that has cooled the blower motor 59 is discharged on the rear surface of the blower housing 57. A cooling air outlet 56b is opened. The blower motor 59 can be efficiently cooled by the cooling air flowing through the cooling air passage formed in the blower motor 59.

  A work air inlet 57a is opened at the front center of the blower housing 57, and a plurality of work air outlets 57b are opened on the outer periphery. Thus, the working air in the filter chamber 32 is sucked into the blower housing 57 from the working air inlet 57a by the blower fan 58 that is rotationally driven by the blower motor 59, and is sent out from the working air outlet 57b.

  A mist separator 61, a prefilter 62, and a HEPA filter 63 are arranged in this order from the upstream side to the downstream side in the blower case 30 between the blower passage 29 and the blower device 55. In addition, a cooling air duct 51 is provided that communicates between the motor housing chamber 33 </ b> A that accommodates the blower motor 59 and the air flow passage 29 to suck the cooling air that has cooled the blower motor 59 into the air flow passage 29.

  Next, a specific configuration of the blower case 30 will be described with reference to FIGS. 6 is a cross-sectional view taken along the line II of FIG. 4 showing an outline of the blower case 30, FIG. 7 is a plan view of the blower case 30, and FIG. 8 is a view taken in the direction of arrow II in FIG.

  The blower case 30 includes a filter chamber 32 extending in a rectangular hollow cross-sectional shape having an upper surface 32a, a lower surface 32b, and side surfaces 32c and 32d, and a rectangular shape having an upper surface 33a, a lower surface 33b, and side surfaces 33c and 33d and larger than the filter chamber 32. A blower chamber 33 extending in a cross-sectional shape has a case main body 31 continuously formed on the same axis through a partition wall 34 having a vent hole 34a at the center. A coupling flange 31a is bent at the ends of the upper surface 32a, the lower surface 32b, and the side surfaces 32c and 32d forming the open end of the filter chamber 32.

  A positioning member 32e that protrudes inward is provided in the middle of the filter chamber 32 of the case body 31 in the axial direction, and the filter chamber 32 is provided with a seal member 35 interposed in a coupling flange 31a that is bent at the open end of the filter chamber 32. A flange 36a formed by bending at one end edge of the pre-filter cover 36 having a rectangular hollow cross section that is continuous with the bolt is coupled with a bolt. A positioning member 36 c that protrudes inward is provided in the middle of the pre-filter cover 36 in the axial direction. A flange 36a bent at the other end edge of the pre-filter cover 36 is bolted to a flange 38a bent at one end edge of the mist separator cover 38 having a rectangular hollow cross section with a seal member 37 interposed therebetween. . Further, the flange 38b formed at the other end of the mist separator cover 38 is formed at the periphery of the end panel 40 having a peripheral surface that is connected to the air flow passage 29 at the center and expands in a tapered shape. The flange 40a is bolted with the seal member 39 interposed.

  In this mist separator cover 38, a mist separator 61 having a rectangular cross section and extending in the axial direction and having a gas-liquid separation function is arranged with the peripheral edge of the inlet side end face thereof in contact with the seal member 39. A gap between the peripheral edge of the inlet side end face and the mist separator cover 38 is hermetically sealed by a seal member 39.

  A prefilter 62 is housed and disposed in the prefilter cover 36 in a state where the peripheral edge of the inlet side end surface abuts against the seal member 37 and the peripheral edge of the outlet side end surface contacts the positioning member 36c. A gap between the peripheral edge of the side end surface and the prefilter cover 36 is hermetically sealed by a seal member 37.

  In the filter chamber 32, the HEPA filter 63 having a rectangular cross section capable of collecting particulate dust and extending in the axial direction has a peripheral edge of the inlet side end surface thereof in contact with the sealing material 35, and a peripheral edge of the outlet side end surface is the filter. It is stored and arranged in contact with a positioning member 32e provided in the chamber 32. A gap between the peripheral edge of the inlet side end face of the HEPA filter 63 and the filter chamber 32 is hermetically sealed by the seal member 35.

  On the other hand, a partition wall 41 is provided on the inner peripheral surface of the blower chamber 33 of the case body 31 so as to face the partition wall 34 with a space therebetween. The partition wall 41 is formed with an opening 41 a having a slightly larger diameter than the blower motor housing 56 of the blower device 55. The blower housing 55 of the blower device 55 abuts the outer peripheral edge of the front surface of the blower housing 57 on the partition wall 34, and the blower motor housing 56 passes through the opening 41a so that it is annular between the rear peripheral edge of the blower housing 57 and the peripheral edge of the opening 41a of the partition wall 41. The blower device 55 is attached to the partition wall 41 by bolting via the seal member 42 and the retainer 43, and the space between the rear outer peripheral edge of the blower housing 57 and the opening 41a is hermetically sealed.

  The inner peripheral edge of the end partition wall 46 having an opening 46a is bolted to the outer peripheral edge of the rear surface of the blower motor housing 56 with an annular sealing material 45 interposed therebetween. Further, the outer peripheral edge of the end partition wall 46 is coupled to the rear end of the blower chamber 33. Furthermore, a flange 48b formed on the peripheral edge of the end panel 48 having an outer air introduction port 48a having a tapered peripheral surface is overlapped with the outer peripheral edge 46b of the end partition wall 46 and bolted.

  As a result, a motor housing chamber 33A that is hermetically partitioned by the partition wall 41 and the end partition wall 46 is formed in the blower chamber 33, and the blower housing housing chamber that is continuous with the filter chamber 31 between the partition wall 34 and the partition wall 41 is formed. 33B is formed.

  A cooling air inlet 56 a that opens to the rear surface of the blower motor housing 56 is opened to the outside through the opening 46 a of the end partition wall 46 and the outside air inlet 48 a of the end panel 48. Further, a cooling air outlet 56b opened on the rear surface of the blower housing 57 is opened to the motor housing chamber 33A.

  The cooling air outlet 33e that opens to the upper surface 33a forming the motor housing chamber 33A formed in the blower case 30 and the vicinity of the downstream end of the air flow passage 29 are communicated with each other via the cooling air duct 51. At the connection portion between the air flow passage 29 and the cooling air duct 51, the air flow passage 29 and the cooling air duct have an acute angle with respect to the axial direction of the air flow passage 29, for example, an intersection angle of 30 °. 51 communicates. A cylindrical discharge port 52 communicating with the outside is formed on the side surface 33c forming the blower housing accommodating chamber 33B.

  With this configuration, the suction is performed by the operation of the blower device 55, the pressure in the filter chamber 32 of the blower case 30 is reduced, the inside of the sewage tank 28 is negatively pressured via the air flow passage 29, and the suction port 27 a of the suction passage 27. The working air sucked from the air is introduced into the filter chamber 32 of the blower case 30 through the suction flow passage 27, the sewage tank 28, and the air flow passage 29, and from the work air inlet 57a of the blower housing 56 of the blower device 55 into the blower housing 56. A working air flow path F is formed which is blown from the working air outlet 57b and discharged from the discharge port 52 to the outside.

  On the other hand, air in the cooling air duct 51 is sucked through the air flow passage 29 to negatively pressurize the motor housing chamber 33A of the blower case 30 and introduce cooling air into the blower motor housing 56 from the outside air inlet 48a of the end panel 48. After being introduced into the blower motor housing 56 through the port 56a and cooling the blower motor 59, it is introduced into the filter chamber 32 of the blower case 30 from the cooling air outlet port 56b through the motor housing chamber 33A and the cooling air duct 51 through the air flow passage 29. A cooling air flow path C is formed which is introduced into the blower housing 56 from the work air inlet 57a of the blower housing 56 of the blower device 55, blown from the work air outlet 57b and discharged to the outside through the discharge port 52.

  The self-propelled cleaning device 1 configured in this manner disperses the cleaning liquid in the cleaning liquid tank 22 from the nozzle 23 as the vehicle travels, and then polishes the floor surface with a rotating brush 25 that rotates in the presence of the cleaning liquid. Further, the inside of the sewage tank 28 is negatively pressurized by the blower device 55 to form the working air circulation path F, and the working air is sucked from the suction port 27a of the suction passage 27 together with the cleaning liquid containing dust accumulated by the squeegee portion 26. Then, the cleaning liquid is collected by sucking and storing the sewage containing dust in the sewage tank 28. Further, the working air from which the sewage and the like have been removed is sucked from the sewage tank 28 by the blower device 55 and sucked into the blower case 30, the water droplets are removed by the mist separator 61, dust and the like while passing through the prefilter 62. Is further collected, and particulate dust is collected by the HEPA filter 63, and clean air with very little mixed dust is introduced into the blower housing 56 from the work air inlet 57a of the blower housing 56 of the blower device 55, The air is blown from the work air outlet 57b and discharged from the discharge port 52 to the outside.

  In addition, air in the cooling air duct 51 is sucked through the air flow passage 29 and the motor housing chamber 33A of the blower case 30 is negatively pressurized to form the cooling air circulation path C, so that outside air is introduced into the end panel 48. The outside air is sucked from the port 48a, introduced into the blower motor housing 56 from the cooling air introduction port 56a of the blower motor housing 56, cools the blower motor 59, and led to the motor housing chamber 33A from each cooling air outlet 56b, and the motor housing chamber. In 33A, an air flow that flows along the outer periphery of the blower motor housing 56 is generated to cool the internal blower motor 59 through the blower motor housing 56, and from the cooling air duct 51 to the filter chamber 32 of the blower case 30 through the air flow passage 29. Introduced, mist separator 61, prefilter 62 and HEPA fibre The dust 63 and carbon dust generated by driving the blower motor 59 and the particulate dust generated by wear of the rotating part are collected, and clean air with very little mixed dust is collected by the blower 55 It is possible to prevent dust, carbon dust, and the like from being introduced into the blower housing 57 through the work air inlet 57a of the housing 57, blown from the work air outlet 57b, and discharged to the outside through the discharge port 52.

  Therefore, according to the present embodiment, the motor housing chamber 33 </ b> A of the blower case 30 that houses the blower motor housing 56 that houses the blower motor 59 of the blower device 55 and the air flow passage 29 communicate with each other through the cooling air duct 51. Dust, carbon dust and the like can be prevented from being discharged to the outside, and it is not necessary to greatly change the conventional blower case and the like, which can be easily applied to a conventional cleaning device and can reduce the manufacturing cost. Further, carbon dust generated by driving the blower motor 59 and dust generated by wear of the rotating part are carried out from the blower motor housing 56 together with the cooling air, and accumulated in the blower motor 59, the blower motor housing 56, the motor housing chamber 33A, and the like. Thus, stable use of the blower motor 59 over a long period of time can be ensured, and carbon dust or the like does not accumulate in the blower motor 59, the blower motor housing 56, the motor accommodating chamber 33A, etc., and the maintenance work can be simplified. It becomes possible.

  Note that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the invention. For example, although the downstream end of the cooling air duct 51 is connected to the air flow passage 29 in the above embodiment, the cooling air cooled by the blower motor 59 can be sucked into the blower case 30 upstream of the prefilter 62. Specifically, it is connected to the end panel 40 and the like upstream of the mist separator 61.

  Moreover, although the said embodiment demonstrated the watering-type cleaning apparatus which sprays a cleaning liquid with the cleaning liquid spraying means 21 as an example, it is applicable also to the cleaning apparatus which does not spray a cleaning liquid. In this case, the mist separator 61 can be omitted.

It is a front view of the self-propelled cleaning device concerning one embodiment of the present invention. It is a side view of a self-propelled cleaning device same as the above. It is a bottom view of a self-propelled cleaning device same as the above. It is a perspective view which shows roughly arrangement | positioning of the internal structure of a self-propelled cleaning apparatus same as the above. It is a figure which shows typically the cleaning apparatus of a self-propelled cleaning apparatus same as the above. FIG. 5 is a cross-sectional view taken along the line II of FIG. 4 showing the outline of the blower case. It is a top view of a blower case same as the above. FIG. 7 is a view taken in the direction of arrow B in FIG. 6. It is a figure which shows the conventional cleaning apparatus typically.

Explanation of symbols

1 Self-propelled cleaning device (cleaning device)
DESCRIPTION OF SYMBOLS 10 Traveling device 20 Cleaning device 21 Cleaning liquid spraying means 22 Cleaning liquid tank 25 Rotating brush 26 Squeegee part 27 Suction passage 27a Suction port 28 Sewage tank (dust collection chamber)
29 Blower flow path 30 Blower case 31 Case body 33A Motor housing chamber 51 Cooling air duct 52 Discharge port 55 Blower device 56 Blower motor housing 57 Blower housing 58 Blower fan 59 Blower motor 61 Mist separator 62 Prefilter (filter)
63 HEPA filter (filter)
F Working air flow path C Cooling air flow path

Claims (4)

A suction passage having a suction port communicates with the blower case via a dust collection chamber and a blower passage continuous to the dust collection chamber, and rotationally drives the blower fan disposed in the blower case and the blower fan. A blower device equipped with a blower motor sucks the working air into the blower case to create a negative pressure in the dust collecting chamber and sucks and holds the dust into the dust collecting chamber from the suction port through the suction flow path, and the working air is blown into the blower case. In the cleaning device that cleans with the filter arranged inside and discharges to the outside,
The blower apparatus includes a blower motor housing that houses a blower motor, introduces outside air into the blower motor housing, cools the blower motor, and sucks cooling air that has cooled the blower motor into the air flow path. apparatus. A suction flow path having a suction port communicates with the blower case through a dust collecting chamber, and the blower device includes a blower fan disposed in the blower case and a blower motor that rotationally drives the blower fan. The working air is sucked in to create a negative pressure in the dust collecting chamber, and dust is sucked and stored in the dust collecting chamber through the suction passage through the suction passage, and the working air is cleaned by a filter disposed in the blower case. In the cleaning device that discharges to
The blower device includes a blower motor housing that houses a blower motor, introduces outside air into the blower motor housing, cools the blower motor, and sucks cooling air that has cooled the blower motor into the blower case upstream of the filter. A cleaning device characterized by. An air intake passage having a suction port communicates with the blower case via a dust collection chamber and a ventilation passage continuing to the dust collection chamber, and rotationally drives the blower fan disposed in the blower case and the blower fan. Working air is sucked into the blower case by a blower device equipped with a blower motor, the negative pressure in the dust collecting chamber is sucked and stored in the dust collecting chamber from the suction port through the suction passage, and inside the blower case. In the cleaning device that cleans the working air with the filter arranged in the
A motor housing chamber that is formed by partitioning the inside of the blower case and in which the blower motor is arranged and outside air is introduced to cool the blower motor;
A cleaning device comprising: a cooling air duct that communicates the motor housing chamber and the air flow path to suck the cooling air that has cooled the blower motor into the air flow path.   The cleaning device according to claim 1, wherein the filter includes a plurality of filters including a HEPA filter.

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