JP2008154634A - Blower case structure of cleaning apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a blower case structure of a cleaning apparatus capable of preventing the discharge of brush dust and dirt generated by a blower motor from the blower case. <P>SOLUTION: In the blower case structure, the inside of a blower case main body 81 is sectioned into a blower chamber I wherein an entrance part 35a and a discharge port 34a are provided and a blower fan is disposed and a tightly sealed blower motor chamber II where the blower motor 40B is disposed through a space with the blower case main body 81 by a partition wall 86. Heat generated by the drive of the blower motor 40B is radiated through the blower case main body 81 and also cooled by operation air passing through the blower chamber I through the partition wall 86. Carbon dust generated by the drive of the blower motor 40B and the dirt generated by the wear of a rotary part or the like are stored inside the blower motor chamber II, and discharge to the inside of the blower chamber I where the operation air flows or the outside is prevented. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a blower case structure of a cleaning device, and in particular, an intake passage having a suction port communicates with the blower case through a dust collection chamber, and the dust collection chamber is loaded by the blower device disposed in the blower case. The present invention relates to a blower case structure of a cleaning device that compresses and sucks dust from a suction port into a dust collecting chamber through a suction passage.

  Generally, the vacuum cleaner is configured to accumulate dust sucked by a blower fan from a suction port in a dust collection chamber. As this type of vacuum cleaner, there is, for example, Patent Document 1. This vacuum cleaner has a blower case connected to a dust collection chamber with an opening through a throttle cylinder, and a blower fan that is driven to rotate using a blower motor in the blower case. A dust collection case is disposed to swingably support a filter housing case in which a filter for fine dust and a filter for fine dust are overlapped, and a disposable bag-like filter, that is, a dust collection bag is provided in the dust collection 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 disposed in the dust collecting case. While passing through the coarse dust filter and fine dust filter in the filter housing case, the coarse and fine dust that has passed through the dust bag is collected, and then the working air passes inside the motor to the outside. Discharged.

  On the other hand, cleaning of clean rooms with controlled air cleanliness such as pharmaceutical company dispensing areas, hospitals, semiconductor factories, etc., discharges a lot of particulate dust from the cleaning device, which deteriorates the environment and causes cross-contamination between drugs. There is a self-propelled cleaning device that reduces the amount of dust discharged as much as possible because it causes quality troubles. As schematically shown in FIG. 9, this cleaning device is a cleaning liquid means for spraying a cleaning liquid on a floor surface from a cleaning liquid tank provided with a self-propelled cleaning device main body via a nozzle 101, and a rotating brush for polishing the floor surface. 102 and a squeegee 103 are arranged in order from the front to the rear. Further, a sewage tank 105 and a blower case 108 communicated with each other through a suction passage 104 having an intake port 104a opened in front of the squeegee 103, and a blower device 109 provided with a blower fan 109a and a blower motor 109b is provided in the blower case 108. A prefilter 131 and a HEPA filter 132 capable of collecting particulate dust are interposed between the sewage tank 105 and the blower case 108. 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 A negative pressure is applied to the inside of the sewage tank 105 by the apparatus 109, and the cleaning liquid on the floor surface is sucked into the sewage tank 105 through the sewage 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 released to the outside from the discharge port 108a is collected with dust and the like by the pre-filter 131, and further, fine particles are collected by the HEPA filter 132. Dust is collected, and clean air with very little dust is released from the outlet 108a.

JP-A-10-234630

  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 out of the machine.

  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 dust and the like to be discharged out of the apparatus together with the working air.

  On the other hand, according to the cleaning device shown in FIG. 9, the working air sucked by the blower device 109 and sucked into the blower case 108 collects dust and the like by the prefilter 131, and further dust particles by the HEPA filter 132. Is collected 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 brush dust generated due to the above, dust generated due to wear of the rotating part inside the motor, and the like are discharged to the outside together with the cooling air from the air outlet 110b.

  Therefore, the objective of this invention made in view of this point is to provide the blower case structure of the cleaning apparatus which can prevent discharge | emission of the brush dust and dust which generate | occur | produce with a blower motor.

  In the invention of the blower case structure of the cleaning device according to claim 1, which achieves the above object, an intake passage having a suction port communicates with the blower case via a dust collecting chamber and is disposed in the blower case. A blower device having a blower fan and a blower motor that rotationally drives the blower fan draws working air into the blower case from the inlet communicating with the dust collecting chamber and discharges the air from the discharge port to negative pressure in the dust collecting chamber. In a blower case structure of a cleaning device that sucks and accommodates dust from the suction port into the dust collecting chamber through the suction passage, an inlet portion and a discharge port through which the working air is introduced and discharged in a hollow outer peripheral wall A blower chamber in which the blower fan is disposed, and a sealed blower motor chamber in which the blower motor is disposed through a space between the outer peripheral wall. And butterflies.

  According to the present invention, an air flow that flows and diffuses along the outer peripheral wall of the blower motor chamber is generated by driving the blower motor disposed in the blower motor chamber formed by dividing the hollow outer peripheral wall. The generated heat is dissipated through the outer peripheral wall and cooled by the working air passing through the blower chamber through the partition wall.

  On the other hand, the blower motor chamber is hermetically sealed by an outer peripheral wall and a partition wall, and the blower motor is accommodated in the blower motor chamber. , It is possible to prevent the working air from being discharged into the blower chamber or the outside where it flows.

  According to a second aspect of the present invention, in the blower case structure of the cleaning device of the first aspect, the outer peripheral wall is provided with the inlet portion and the discharge port and has an open end, and is opposed to the open end of the blower cover. A bottomed cylindrical motor cover having an opening end that is connected, and an outer peripheral portion is coupled between the opening end of the blower case and the opening end of the motor cover to form the blower chamber in cooperation with the blower cover. And a partition that forms a blower motor chamber in cooperation with the motor cover.

  According to the present invention, the blower chamber and the partition wall form a blower chamber, the blower motor chamber sealed by the partition wall and the motor cover is formed, and the heat generated by the drive of the blower motor disposed in the blower motor chamber passes through the motor cover. It is radiated and cooled by the working air passing through the blower chamber through the partition wall.

  On the other hand, the blower motor chamber is sealed by a motor cover and a partition, and carbon dust generated by driving the blower motor and dust generated by wear of rotating parts are accumulated in the blower motor chamber and discharged to the blower chamber and the outside where the working air flows. Can be prevented.

  According to a third aspect of the present invention, in the blower case structure of the cleaning device according to the second aspect, the partition wall has an opening that communicates the blower chamber and the blower motor chamber, and the blower device includes a blower fan. A blower fan housing to be accommodated and the blower motor having a smaller diameter than the blower housing and connected to the blower fan housing, wherein the blower device passes through the opening, and the blower housing is attached to the opening through a seal member And the opening is closed.

  According to the present invention, the blower device can be arranged with a simple configuration in which the opening is provided in the partition wall and the blower fan housing of the blower device is attached and supported via the seal member.

  According to a fourth aspect of the present invention, in the blower case structure of the cleaning device according to the first aspect, the outer peripheral wall includes a hollow blower case main body having the inlet portion and the discharge port and having an open end, and the open end. It has a cover for closing, and is provided with a partition wall whose outer peripheral portion is coupled to the inner peripheral surface of the blower case main body and divides the blower case main body into the blower chamber and the blower motor chamber.

  According to the present invention, the blower chamber and the blower motor chamber are formed with a simple configuration in which the opening end of the blower case main body provided with the partition wall is closed with the cover, and the blower motor disposed in the blower motor chamber is driven along the blower case main body. Then, an air flow that flows and diffuses in the blower motor chamber is generated, and heat generated by the blower motor is radiated through the blower case body and the cover and is cooled by working air passing through the blower chamber through the partition wall.

  On the other hand, the blower motor chamber is sealed by the blower case main body, the cover and the partition, and carbon dust generated by driving the blower motor and dust generated by wear of the rotating part etc. accumulate in the blower motor chamber formed by the blower case main body, the cover and the partition. As a result, it is possible to prevent the working air from being discharged into the blower chamber where it flows or outside.

  According to a fifth aspect of the present invention, in the blower case structure of the cleaning device according to the fourth aspect, the partition has an opening that communicates the blower chamber and the blower motor chamber, and the blower device includes the blower fan. A blower fan housing to be accommodated, and a blower motor having a smaller diameter than the housing and connected to the blower fan housing, wherein the blower device passes through the opening, and the blower housing is attached to the opening via a seal member In addition, the opening is closed.

  According to the present invention, the blower device can be disposed with a simple configuration in which the opening is provided in the partition wall and the blower fan housing of the blower device is attached and supported via the seal member, and the seal member is previously attached to the blower device. In this state, the blower device can be easily disposed by inserting it from the open end of the blower case body and attaching the seal member to the partition wall.

  According to the present invention, heat generated by driving a blower motor disposed in a sealed blower motor chamber is radiated through the outer peripheral wall and is cooled by working air passing through the blower chamber through the partition wall. On the other hand, it is possible to prevent carbon dust generated by driving the blower motor and dust generated due to wear of the rotating part from being accumulated in the blower motor chamber and discharged to the blower chamber and the outside where the working air flows.

  Hereinafter, an embodiment of a blower case structure of a cleaning device of the present invention will be described by taking a self-propelled cleaning device as an example.

(First embodiment)
A first embodiment will be described with reference to FIGS. 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 controls a traveling device 10 that travels on the floor surface to be cleaned while detecting and avoiding obstacles in the cleaning range, a cleaning device 20 that cleans the floor surface, and the like. A control device 80 is provided.

  The traveling device 10 is provided at the lower part of the self-propelled cleaning device 1, and is provided respectively on the front and rear driving wheels 11 provided on the left and right of the center position in the front-rear direction as shown in FIGS. A front caster 12 and a rear caster 13 are provided that can swing according to the traveling of the self-propelled cleaning device 1. As shown in FIG. 3, the left and right drive wheels 11 are connected to a drive motor 14 via a speed reducer. The traveling steering of the self-propelled cleaning device 1 is performed by the difference in the rotational speeds 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 from the front caster 12, and an obstacle sensor 16 that detects an obstacle on the side of the vehicle body at a rear position of the rear caster 13. Is provided.

  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 rotating 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 working air are arranged in order from the front to the rear. As shown in FIGS. 3 and 4, the squeegee portion 26 is provided with a rubber wiper portion 28 in contact with the floor surface at the lower end of the squeegee main body 27 curved in a substantially semicircular arc shape at the rear lower position of the self-propelled cleaning device 1. In addition, a suction passage 29 in which a suction port 29a is opened is provided in front of the central portion of the wiper portion 28.

  The suction passage 29 is connected to a sewage tank 30 serving as a dust collecting chamber, and a blower case 32 serving as an outer peripheral wall is continuously formed in the sewage tank 30 via an air suction passage 31 and formed in the blower case 32 with a relatively large diameter. A blower device 40 in which a blower housing 40A that accommodates the blower fan and a blower motor 40B that has a relatively small diameter and rotationally drives the blower fan is unitized is accommodated. Between the air suction passage 31 connected to the sewage tank 30 and the blower case 32, the prefilter 71 extending in the axial direction with a rectangular cross section and the rectangular shape extending in the axial direction can collect particulate dust. A HEPA filter 72 is interposed. Further, as in the present embodiment, in the case of a watering type cleaning device, a mist separator (not shown) may be provided in the previous stage of the pre-filter 71.

  The prefilter 71 includes a block-shaped filter body 71A having a rectangular annular outer peripheral surface 71a, an inlet-side end surface 71d and an outlet-side end surface 71e as shown in FIG. The outer peripheral edge portion of the surface 71a, the inlet side end surface 71d and the outer peripheral edge portion of the outlet side end surface 71e are hermetically covered with a covering material 71B made of, for example, an aluminum alloy and a resin coating. Similarly, the HEPA filter 72 has a block-shaped filter body 72B having a rectangular annular outer peripheral surface 72a, an inlet-side end surface 72d, and an outlet-side end surface 72e. The outer peripheral surface 72a, the outer peripheral portion of the inlet-side end surface 72d, and The outer peripheral edge portion of the outlet side end face 72e is airtightly covered with a covering material 72B made of, for example, an aluminum alloy and a resin coating.

  The blower case 32 is formed in a hollow shape by a blower cover 33 and a motor cover 45 as shown in FIG. The blower cover 33 has a rectangular hollow cross-sectional shape and extends in the axial direction in a box shape. The cover body 34 is formed with a discharge port 34a, and an inlet portion 35a is formed in one end surface portion 35 of the cover body 34 in a rectangular tube shape. An outlet side filter holding portion 36 continuously formed on the cover body 34, and a connecting flange portion 39 extending along the opening end of the cover body 34 and bent outward so as to have a mounting hole 39a. have.

  The outlet side filter holding part 36 is formed of a flange-like connecting flange part 37 formed outwardly along an edge of a cylindrical inlet part 35 a formed on the end face part 35, and a rectangular cylinder from the connecting flange part 37. A filter edge outer periphery holding portion 38a is formed which has an outer periphery holding portion 38 that protrudes in the shape of an outer periphery and the outlet side edge portion 72c of the outer peripheral surface 72a of the HEPA filter 72 is fitted to the inner peripheral surface of the outer periphery holding portion 38. In addition, a filter end surface abutting portion 37 a is formed that is hermetically abutted along the entire outer peripheral edge portion of the outlet side end surface 72 e of the HEPA filter 72 along the inner periphery of the end surface of the connecting flange portion 37. A mounting hole 37 b extending in the axial direction is formed in the end edge of the coupling flange portion 37. A blower device attachment portion 35 b that holds the blower device 40 is formed on the end surface portion 35.

  The partition wall 41 is formed with an opening 41a having a slightly larger diameter than the blower housing 40A of the blower device 40 and can be overlapped with a connecting flange portion 37 formed on the blower cover 33 at the outer peripheral portion, and corresponds to the mounting hole 37b. A mounting hole 41b is formed. The motor cover 45 is a bottomed cylindrical shape having a cylindrical outer peripheral surface 46 and a bottom portion 47 that cover a space 49 allowing the flow and diffusion of cooling air between the motor cover 45 and the blower motor 40B. It has a connecting flange 48 which is opposed to the connecting flange 39 and has a mounting hole 48a.

  On the other hand, the blower motor 40B is penetrated through the opening 41a, and the blower device 40 is bolted between the outer peripheral edge of the rear surface of the blower housing 40A and the peripheral edge of the opening 41a of the partition wall 41 with an annular seal member 50 interposed therebetween. 41 and a hermetic seal between the rear outer peripheral edge of the blower housing 40A and the opening 41a.

  Then, the connecting flange 39 of the blower cover 33 and the connecting flange 48 of the motor cover 45 are fastened by bolts 51a and nuts 51b with the outer periphery of the partition wall 41 interposed.

  As a result, the blower case 33 is formed by the blower cover 33 and the motor cover 45 and the inside of the blower case 32 is partitioned by the partition wall 41 and the seal member 50, and a passage for working air is formed continuously from the inlet 35a to the discharge port 34a. A blower motor chamber II sealed by the motor cover 45 and the partition wall 41 is formed.

  On the other hand, an air flow that flows and diffuses along the inner peripheral surface of the motor cover 45 is generated by driving the blower motor 40B disposed in the blower motor chamber II, and the heat generated by the blower motor 40B passes through the motor cover 45. It is radiated and cooled by working air passing through the blower chamber I through the partition wall 41 and the blower housing 40A. Further, the blower motor chamber II is airtightly separated from the blower chamber I by the partition wall 41, and the blower motor 40B is housed in the blower motor chamber II maintained in a sealed state. Therefore, carbon dust generated by driving the blower motor 40B and Dust generated due to wear or the like of the rotating part is accumulated in the blower motor chamber II formed by the motor case 45 and is not discharged outside.

  The attachment structure of the pre-filter 71 and the HEPA filter 72 will be described with reference to FIG.

  The inlet side filter holding part 52 formed in the air suction passage 31 connected to the sewage tank 30, the intermediate filter holding member 55 disposed between the prefilter 71 and the HEPA filter 72, and the blower case 32 are formed. The outlet side filter holding part 36 is provided.

  The inlet-side filter holding portion 52 is formed to protrude in a rectangular cylindrical shape from a flange-like connection flange portion 53 that is bent outward along the edge of the expanded air suction passage 31 and the connection flange portion 53. A filter edge outer periphery holding portion 54a is formed on the inner peripheral surface of the outer periphery holding portion 54, and the inlet edge portion 71b of the outer peripheral surface 71a of the prefilter 71 is fitted to the inner peripheral surface of the outer periphery holding portion 54. A filter end surface holding portion 53a is formed that is hermetically in contact with the entire outer periphery of the inlet side end surface 72d of the prefilter 71 along the inner periphery of the end surface of the portion 53. An attachment hole 53b extending in the axial direction is formed in the vicinity of the outer peripheral edge of the connecting flange portion 53.

  The intermediate filter holding member 55 includes a front filter holding portion 57 and a rear filter holding portion 60 that are connected by a hollow communication portion 56. The front filter holding portion 57 has a flange-like connecting flange portion 58 bent outward along the edge of the communication portion 56 and an outer peripheral holding portion 59 that is formed to protrude from the connecting flange portion 58 into a rectangular cylindrical shape. A filter edge outer periphery holding portion 59a is formed on the inner peripheral surface of the outer peripheral holding portion 59, and the outlet end edge portion 71c of the outer peripheral surface 71a of the prefilter 71 is fitted to the inner peripheral surface of the connecting flange portion 58. A filter end surface holding portion 58a is formed along the periphery of the outer peripheral edge portion of the outlet side end surface 71d of the prefilter 71 in an airtight manner. An attachment hole 58b extending in the axial direction is formed in the vicinity of the outer peripheral edge of the connecting flange portion 58.

  Similarly, the rear filter holding part 60 is formed in a rectangular tube shape from the flange-like connecting flange part 61 and the connecting flange part 61 that are bent outward along the edge of the communication part 56, and the outer peripheral holding part. 62 is formed on the inner peripheral surface of the outer peripheral holding portion 62, and the filter edge outer peripheral holding portion 62 a into which the inlet side edge portion 72 b of the outer peripheral surface 72 a of the HEPA filter 72 is fitted. A filter end surface holding portion 61a is formed along the inner periphery of the end surface in a hermetic contact with the entire outer peripheral edge portion of the inlet side end surface 72d of the HEPA filter 72. A mounting hole 61 b extending in the axial direction is formed in the vicinity of the outer peripheral edge of the connecting flange portion 61. Further, the intermediate filter holding member 55 is provided with a mounting bolt for fixing the intermediate filter holding member 55 to the frame or the like of the traveling device, but the illustration and description are omitted for the sake of simplicity.

  The inlet side edge 71b of the outer peripheral surface 71a of the prefilter 71 is fitted into the filter edge outer peripheral holding portion 54a formed on the inner peripheral surface of the outer peripheral holding portion 54 of the inlet side filter holding portion 52 thus configured. While the outer peripheral edge portion of the side end surface 71d is brought into contact with the filter end surface holding portion 53a, the outer periphery of the filter edge formed on the inner peripheral surface of the outer peripheral holding portion 59 of the front filter holding portion 57 formed on the intermediate filter holding member 55 The holding portion 59a is fitted to the outlet side edge portion 61c of the outer peripheral surface 71a of the prefilter 71, and the filter end surface holding portion 58a is brought into contact with the outer peripheral edge portion of the outlet side end surface 71d.

  An attachment hole 53b formed in the connection flange portion 53 of the inlet-side filter holding portion 52 fitted to both ends of the prefilter 71 and an attachment hole 58b formed in the connection flange portion 58 of the intermediate filter holding member 55. The inlet side filter holding member 52 and the intermediate filter holding part 55 are fastened by applying tension by the first fastening means by the mounting bolt 65a to be inserted and the nut 65b screwed to the mounting bolt 65a, and the inlet side filter holding member 52 The prefilter 71 is sandwiched and fixed between the intermediate filter holding portion 55. As a result, the prefilter 71 can be held in a stable state, and the filter end surface holding portion 53a of the inlet side filter holding portion 52 is in airtight contact with the entire outer peripheral edge portion of the inlet side end surface 71d of the prefilter 71. In addition, the filter end surface holding portion 60 of the front filter holding portion 57 can be maintained in an airtight contact with the entire outer peripheral edge portion of the outlet side end surface 71e of the prefilter 71.

  Similarly, the inlet side edge of the outer peripheral surface 72a of the HEPA filter 72 is formed on the inner peripheral surface of the outer peripheral holding portion 62 of the rear filter holding portion 60 formed on the intermediate filter holding member 55 and is formed on the filter edge outer peripheral holding portion 62a. 72b is inserted so that the outer peripheral edge portion of the inlet side end face 72d is brought into contact with the filter end face holding part 61a, while the inner peripheral face of the outer peripheral holding part 38 formed in the outlet side filter holding part 36 formed in the blower case 32. The filter edge outer periphery holding portion 38a formed on the outer peripheral surface 72a of the HEPA filter 72 is fitted to the outlet side edge portion 72c, and the filter end surface holding portion 37a is brought into contact with the outer peripheral edge portion of the outlet side end surface 72d. .

  The mounting hole 61b formed in the connecting flange portion 61 of the rear filter holding portion 60 of the intermediate filter holding member 55 fitted to both ends of the HEPA filter 72 and the outlet side filter holding portion 36 formed in the blower case 32. Tension is applied by the second fastening means by the mounting bolt 66a inserted into the mounting hole 37b drilled in the connecting flange portion 37 and the nut 66b screwed into the mounting bolt 66a, and the rear filter holding portion 60 and the outlet are provided. The side filter holding part 36 is fastened and the HEPA filter 72 is sandwiched and fixed between the rear filter holding part 60 and the outlet side filter holding part 36 of the intermediate filter holding member 55. Further, when attaching the pre-filter 71 and the HEPA filter 72, rubber packings (not shown) are provided on the outer periphery of the inlet-side end face and the outlet-side end face, and the inlet-side end face and the outlet-side end face are sandwiched and fixed by each filter holding portion.

  As a result, the HEPA filter 72 can be held in a stable state, and the filter end surface holding portion of the rear filter holding portion 60 is in airtight contact with the entire outer peripheral edge portion of the inlet side end surface 72d of the HEPA filter 72. In addition, the filter end surface holding portion of the outlet filter holding portion 36 can be maintained in an airtight contact with the entire outer peripheral edge portion of the outlet side end surface 72e of the HEPA filter 72.

  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. In addition, the inside of the sewage tank 30 is negatively pressured by the blower device 40 and the working air is sucked from the suction port 29a of the sewage suction passage 29 together with the cleaning liquid containing dust accumulated by the squeegee portion 26, and the cleaning liquid is sucked and stored in the sewage tank 30. And collect. The air sucked from the sewage tank 30 by the blower device 40 and sucked into the blower case 32 and discharged to the outside from the discharge port 34a is collected by the prefilter 71, and further dust and the like are collected by the HEPA filter 72. Is collected, and clean air with very few dusts is released from the discharge port 34a.

  Therefore, according to the blower case 32 configured as described above, the blower case 33 is formed by the blower cover 33 and the motor cover 45, and the inside of the blower case 32 is airtightly partitioned by the partition wall 41, the seal member 50, and the rear portion of the blower housing 40A. A passage for working air is formed continuously from 34a to the discharge port 34a, and a blower chamber I for containing a blower fan and a blower motor chamber II for sealing a blower motor 40B are formed. .

  As a result, an air flow that flows and diffuses along the motor cover 45 is generated by driving the blower motor 40B disposed in the blower motor chamber II, and the heat generated by the blower motor 40B is dissipated through the motor cover 45. Cooling is performed by working air passing through the blower chamber I through the partition wall 41 and the blower housing 40A.

  On the other hand, the blower motor chamber II is hermetically partitioned from the blower chamber I by the partition wall 41, and the blower motor 40B is accommodated in the blower motor chamber II maintained in a sealed state. Therefore, carbon dust generated by driving the blower motor 40B and Dust generated due to wear of the rotating portion is accumulated in the blower motor chamber II formed by the motor case 45, and can be prevented from being discharged into or outside the blower chamber I where the working air flows.

(Second Embodiment)
A second embodiment of the present invention will be described with reference to FIG. In FIG. 8, parts corresponding to those in FIGS. 1 to 7 are denoted by the same reference numerals, and detailed description thereof is omitted.

  FIG. 8 is a cross-sectional view of the blower case 80 corresponding to FIG. 7 of the first embodiment.

  The blower case 80 has a blower case main body 81 that is a box-shaped outer peripheral wall extending in the axial direction with a rectangular hollow cross-sectional shape. An outlet side filter holding portion 36 is formed, and a flange portion 84 that is bent inward along the other opening end 83 is formed. A cover 85 that hermetically closes the opening end 83 of the blower case main body 82 is attached to the flange portion 84 by a bolt 85a. A blower device attachment portion 34b is formed on the end surface portion 82.

  An outer peripheral portion of a partition wall 86 having an opening 86 a slightly larger in diameter than the blower housing 40 </ b> A of the blower device 40 is welded and joined in the axial central portion of the inner peripheral surface of the blower case body 81. The interior is divided into a blower chamber I, a floor chamber I, and a blower motor chamber II having an inlet 35a and a discharge port 34a.

  An annular seal member 50 is interposed between the outer peripheral edge of the rear surface of the blower device 40 in which the front surface of the blower housing 40A is in contact with the blower device mounting portion 34b and the peripheral edge portion 86b of the opening 86a of the partition wall 86, and is coupled by bolts 87a and 87b. The blower device 40 is attached in the blower case main body 81. As a result, the blower case main body 81 is hermetically partitioned into the blower chamber I and the blower motor chamber II by the partition wall 86, the seal member 50, and the rear portion of the blower housing 40A of the blower device 40. In addition, a space 89 that allows the flow and diffusion of cooling air is formed between the blower motor 40 </ b> B of the blower device 40 and the blower case body 81.

  The blower case 80 is assembled in advance by connecting the seal member 50 to the rear surface of the blower housing 40A of the blower device 40 with a bolt 87a, and connecting the blower device 40 to which the seal member 50 is attached to the open end 83 side of the blower case body 81. The blower housing 40A is inserted into the blower chamber I through the opening 86a of the partition wall 86 and the seal member 50 is brought into contact with the peripheral edge portion 86b of the opening 86a of the partition wall 86. Positioning is obtained, and the seal member 50 can be easily attached by being connected to the peripheral edge 86b of the opening 86a of the partition wall 86 by the bolt 87b. Thereafter, the opening end 83 of the blower case body 81 is hermetically closed by the cover 85.

  According to the blower case 80 configured in this manner, an air flow that flows and diffuses along the blower case body 81 is generated by driving the blower motor 40B disposed in the blower motor chamber II, and the heat generated by the blower motor 40B is generated. Is radiated through the blower case body 81 and the cover 85 and is cooled by the working air passing through the blower chamber I through the partition wall 86 and the blower housing 40A.

  On the other hand, the blower motor chamber II is hermetically partitioned from the blower chamber I by the partition wall 86, the rear portion of the blower housing 40A and the seal 50, and the blower motor 40B is housed in the blower motor chamber II maintained in a sealed state. It is possible to prevent carbon dust generated by the driving of 40B and dust generated due to wear of the rotating part from being accumulated in the blower motor chamber II and discharged into the blower chamber I where the working air flows or outside.

  The present invention is not limited to the first embodiment and can be variously modified without departing from the spirit of the invention. For example, cooling fins or the like can be formed on the motor cover 45 in the first embodiment or the blower case main body 81 in the second embodiment to promote cooling of the blower motor 40B.

It is a front view of the self-propelled cleaning device provided with the blower case structure concerning a 1st embodiment of the present invention. It is a side view of a self-propelled cleaning device. It is a bottom view of a self-propelled cleaning device. It is a perspective view which shows roughly arrangement | positioning of the internal structure of a self-propelled cleaning apparatus. It is a figure which shows a cleaning apparatus typically. It is the A section enlarged view of FIG. It is the B section enlarged view of FIG. It is a figure which shows the blower case structure which concerns on 2nd Embodiment of this invention. It is a figure which shows the conventional cleaning apparatus typically.

Explanation of symbols

20 Cleaning device 29 Intake passage 29a Suction port 30 Sewage tank (dust collection chamber)
32 Blower case 33 Blower cover (outer wall)
34a Discharge port 35a Inlet portion 40 Blower device 40A Blower fan housing 40B Blower motor 41 Partition wall 41a Opening portion 45 Motor cover (outer peripheral wall)
50 Seal member 80 Blower case 81 Blower case body (outer peripheral wall)
85 Cover 86 Partition 83 Opening I Blower chamber II Blower motor chamber

Claims (5)

An air intake passage having a suction port communicates with the blower case via the dust collection chamber, and the dust collection chamber is provided with a blower fan disposed in the blower case and a blower motor that rotationally drives the blower fan. The suction air is sucked and stored in the dust collecting chamber from the suction port through the suction passage by sucking the working air into the blower case from the inlet communicating with the side and discharging the working air from the discharge port to negatively pressure the dust collecting chamber. In the blower case structure of the cleaning device
The blower motor is disposed between the outer peripheral wall and a blower chamber provided with an inlet portion and a discharge port through which the working air is introduced and discharged through a hollow outer peripheral wall and the blower fan is disposed. A blower case structure for a cleaning device, which is partitioned into a sealed blower motor chamber. The outer peripheral wall includes a blower cover having the inlet portion and the discharge port and having an open end, and a bottomed cylindrical motor cover having an open end facing the open end of the blower cover,
A partition wall having an outer peripheral portion coupled between the opening end of the blower case and the opening end of the motor cover to form the blower chamber in cooperation with the blower cover and to form the blower motor chamber in cooperation with the motor cover The blower case structure of the cleaning device according to claim 1, further comprising: The partition has an opening that communicates the blower chamber and the blower motor chamber,
The blower device includes a blower fan housing that houses a blower fan, and the blower motor that has a smaller diameter than the blower housing and is connected to the blower fan housing.
The blower case structure for a cleaning device according to claim 2, wherein the blower device passes through the opening, and the blower housing is attached to the opening via a seal member and closes the opening. . The outer peripheral wall has a hollow blower case body having an opening end provided with the inlet portion and the discharge port, and a cover for closing the opening end,
2. The cleaning device according to claim 1, further comprising a partition wall having an outer peripheral portion coupled to an inner peripheral surface of the blower case main body and dividing the blower case main body into the blower chamber and the blower motor chamber. Blower case structure. The partition has an opening communicating the blower chamber and the blower motor chamber,
The blower device includes the blower fan housing that houses the blower fan, and the blower motor that has a smaller diameter than the housing and is connected to the blower fan housing.
The blower case structure for a cleaning device according to claim 4, wherein the blower device passes through the opening, and the blower housing is attached to the opening via a seal member and closes the opening.

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