WO2006068403A1

WO2006068403A1 - Cleaning robot having double suction device

Info

Publication number: WO2006068403A1
Application number: PCT/KR2005/004404
Authority: WO
Inventors: Kyung Chul Shin; Shin Kim; No Soo Lee; You Shin Kim; Jae Young Lee
Original assignee: Yujin Robotics Co., Ltd.
Priority date: 2004-12-22
Filing date: 2005-12-20
Publication date: 2006-06-29
Also published as: KR100588061B1

Abstract

The present invention relates to a cleaning robot having a double suction device, which is comprised of: a casing 110 formed with wheel type running wheels 111 configured to rotate and move at the lower both sides of the casing, the running wheels supported by a plurality of supporting wheels 112 provided at the lower portion of the casing, an infrared ray sensor 114 installed at the front of the casing in the radial direction for detecting the position of the obstacles, a bumper installed at the front thereof for mitigating the impact produced upon the contact with the obstacles, and an electric power supply portion 115 installed at the rear side thereof for supplying the electric power; a brush portion 120 formed with a brush 121 at the lower center of the casing 110 by means of a vibration shaft 122 moving upwardly and downwardly, one end of the brush 121 and a brush motor being connected by means of a coupling 123 so that the brush can rotate and vibrate upwardly and downwardly, and a plate type blade 125 installed at the rear of the rotating brush 121 to be positioned at a desired height from the ground to thereby collect the garbage dispersed from the brush 121 and guide to the upper portion of the casing; a dust collecting portion 130 formed with a housing 131 for receiving the garbage within the casing 110, the housing having a grip 132 for facilitating the taking out thereof at the upper portion thereof, suction flow paths for the garbage constructed doubly by a brush suction opening 134 formed at the lower portion of the housing 131 for sucking the garbage collected at the upper portion of the brush 121 and a dust collecting suction opening 135 formed at the rear of the brush 121 for vacuum sucking the garbage, the brush suction opening and the dust collecting suction opening being connected to one side of the housing 131 by means of a distributor 133 to thereby suck and collect the garbage within the housing 131, and a cleanable anti-fungal filter 137 connected to one side of the distributor 133 with installing a packing 138 at a connection portion for preventing the leakage of the air to thereby filter the collected garbage; and a suction device 140 having a suction opening 143 for vacuum sucking the garbage and formed with an anti- fungal filter 137 sealed by a packing 138 of the dust collecting portion 130 and a packing 144 for preventing the leakage of the air, and a fan 142 rotated by the driving of a suction motor 141 installed at the inside of the suction opening 143 for producing the vacuum suction force.

Description

CLEANING ROBOT HAVING DOUBLE SUCTION DEVICE

Technical Field

[1] The present invention relates to a cleaning robot having a double suction device, in particular to a cleaning robot having a double suction device, in which garbage is at first sucked through a brush suction opening formed at the upper portion of a brush, which is detachably constructed to rotate and vibrate upwardly and downwardly, and then it is secondarily sucked through a dust collecting suction opening formed at the rear of the brush by means of the vacuum suction force produced at the suction device, so that it is possible to increase the cleaning efficiency by performing the double suction by means of the brush suction opening and the dust collecting suction opening and to prevent the backward flow of the sucked garbage after the cleaning.

[2]

Background Art

[3] In general, a robot is called a mechanical man. First of all, it represents a human- shaped automatic doll which has a mechanical device installed and assembled therein, and acts as a human being in itself with regard to the hands and foots and the like. In this connection, the term 'robot' means 'work (robota)'in Czech.

[4] Such a robot is a high-priced device in which a complex algorithm is realized, and is greatly limited in its application range. Further, in various fields, it is possible to realize the robot only in theory, but it is impossible to technically realize the robot, so that it is not easy to use the technology of the robot in a house, but not in the industries, although it tends to mass produce the robots depending on the developing type of the technique.

[5] Accordingly, various types of cleaning robots are developed and put on the market recently, which are operated with various algorithms by incorporating the feasible sensing techniques into a cleaner.

[6] The method for cleaning the garbage using the cleaning robot can be largely divided into two types, such as a cleaning method using the brush, and a cleaning method using the suction force of the vacuum suction device.

[7] First, according to the cleaning method using the brush, the brush is rotated to suck the garbage such as dusts and solid impurities concentrated on the floor bottom into an inside dust collecting portion of the cleaning robot. In this regard, it is possible to easily clean the garbage closely adhered to the floor bottom or the large garbage having relatively big particle size by means of such cleaning robot.

[8] However, in the above cleaning method using the brush, there occurs a problem in that garbage such as minute dusts is floated around by means of the brush and stays in the air to thereby make the air more muddy by spreading the dust particles placed on the floor bottom into the air.

[9] Also, the cleaning method using the suction force of the vacuum suction device is configured such that a cleaning is performed by vacuum sucking the air in the desired area range. In this regard, it is possible to clean the minute dusts in the desired area range quickly and accurately by sucking the dusts formed on the floor bottom while moving in various patterns.

[10] However, in such a cleaning method using the suction force of the vacuum suction device, in which garbage is removed by sucking the air at the vacuum state, there is caused a problem in that it is impossible to perform a clear cleaning because the garbage closely adhered to the floor bottom or to a carpet or heavy garbage having a large size cannot be sucked.

[11] Nowadays, there is disclosed a structure of sucking garbage having a large particle and garbage closely adhered to floor bottom by means of the brush and the vacuum suction device after installing the brush for taking away the garbage and vacuum suction device for sucking it at the same time. However, there is caused a problem that production cost is increased because suction force of high output is required for absorbing the wide floor surface with the brush, and contamination is produced by the downward outflow of the dusts concentrated at the suction side of the brush, when the operation of the device is stopped to thereby extinct the suction force.

Disclosure of Invention

Technical Problem

[12] The present invention has been made to solve the above-mentioned problems occurring in the conventional art, and it is a primary object of the present invention to provide a cleaning robot having a double suction device, which is constructed such that a brush is formed at the lower portion of the cleaning robot for removing the garbage while rotating toward the center thereof, the robot being moved by means of the rotation of running wheels while detecting obstacles by means of an infrared ray sensor, and a dust collecting opening is formed at a rear portion of the brush, and further the dust collecting opening and a suction opening of the brush formed above the brush are connected to a suction device for vacuum sucking the garbage, so that the garbage produced by the brush and the garbage sucked through the dust collecting suction opening can be doubly sucked by means of the brush and the dust collecting suction opening, and then collected at the inside of a housing for the dust collecting portion provided with an anti-fungal filter by the vacuum suction force produced from the suction device, to thereby make it possible to minimize the production cost and maximize the cleaning effect by accomplishing the double cleaning effect by means of one suction device.

[13] Another object of the present invention is to minimize the surrounding pollution due to the arrangement of the brush to realize a clear finish cleaning to thereby increase the cleaning efficiency, by being constructing such that the brush for removing the garbage with rotation by the operation of a brush-motor can be stopped first, if the cleaning robot stops its work of cleaning, so that garbage produced due to the stopping of the brush can be removed doubly through the brush suction opening formed above the brush and the dust collecting suction opening formed at the rear of the robot.

[14] Still another object of the present invention is to increase the cleaning efficiency by sucking the garbage on the ground with enhanced suction force and producing friction with the ground, which is accomplished by being constructed such that a suction skirt formed with flow paths is made of soft material which does not obstruct the moving of the robot in spite of its contact with the ground, the flow paths projecting toward a suction side of the dust collecting suction opening connected with the suction device for vacuum sucking the garbage by the rotation of a fan, to thereby double the suction force by producing a convection flow of an air sucked through the projecting flow paths formed at the suction skirt.

[15] Still another object of the present invention is to increase the dust collecting efficiency of the brush with simple structure and minimize the disperse of the garbage due to the rotation of the brush to thereby reduce the air pollution in the cleaning area by installing a dust collecting blade for collecting the garbage dispersed by the brush and guiding the garbage toward the suction opening of the brush at a lower portion of the cleaning robot, the dust collecting blade being spaced apart from the ground by a desired interval toward the rear portion of the brush rotated by the operation of the brush-motor and receiving the garbage therein.

[16] Still another object of the present invention is to improve the cleaning degree in the cleaning area by removing the dirties formed during the rotation of the brush, by pro- jectively forming a sweeping device at the lower portion of the cleaning robot above the brush, which is rotated by the operation of the brush motor and receives the garbage, for shaking off the dirties toward the suction opening of the brush.

[17] Still another object of the present invention is to increase the cleaning efficiency of the cleaning robot by producing the cleaning effect while striking fiber materials such as those of a carpet by means of the upward and downward vibration rotation of the brush, which is rotated by a brush motor having a vibration shaft vibrating upwardly and downwardly at the center thereof, and coupled to a lower portion of the cleaning robot, and is operated for receiving the garbage, and to increase the general usage of the cleaning robot by detachably forming the brush to thereby make it easy to replace the brush adapted for the usage depending on the position and place.

[18] Still another object of the present invention is to minimize the cleaning exclusion area produced outside of the rotation radius of the cleaning robot, which is operated to perform cleaning with rotation movement, to thereby increase the cleaning efficiency, by forming an assistant brush for collecting the garbage toward the brush and being rotated by an assistant motor, at the front side of the brush positioned at the lower portion of the cleaning robot.

[19] Also, still another object of the present invention is to create clean circumstances of the inside of a room by spraying an anti-fungal material to an anti-fungal filter formed at a dust collecting portion consisting of a brush and a dust collecting suction opening for filtering the garbage to suppress the increase of the harmful bacteria and make it possible to perform replacement and water cleaning to thereby maintain the cleanliness of the inside of the room easily.

[20] Still another object of the present invention is to install a suction device, which is operated to vacuum suck the garbage by the suction force produced from the rotation of a fan driven by a suction motor, at a dust collecting portion consisting of a brush and a dust collecting suction opening for filtering and receiving the garbage with an antifungal filter, so that it is possible to increase the durability of the cleaning robot and minimize the breakdown to thereby reduce the maintaining and repair costs by connecting an engagement portion between the dust collecting portion and the suction device with a sealing packing to prevent the leakage of the garbage, which is produced by the application of a strong suction pressure at the above engagement portion, to thereby prevent the inside of the cleaning robot from being contaminated. Technical Solution

[21] To solve such objects of the present invention, there is provided a cleaning robot having a double suction device comprising a casing formed with wheel type running wheels configured to rotate and move at the lower both sides of the casing, the running wheels supported by a plurality of supporting wheels provided at the lower portion of the casing, an infrared ray sensor installed at the front of the casing in the radial direction for detecting the position of the obstacles, a bumper installed at the front thereof for mitigating the impact produced upon the contact with the obstacles, and a electric power supply portion installed at the rear side thereof for supplying the electric power; a brush portion formed with a brush at the lower center of the casing by means of a vibration shaft moving upwardly and downwardly, one end of the brush and a brush motor being connected by means of a coupling so that the brush can rotate and vibrate upwardly and downwardly, and a plate type blade installed at the rear of the rotating brush to be positioned at a desired height from the ground to thereby collect the garbage dispersed from the brush and guide to the upper portion of the casing; a dust collecting portion formed with a housing for receiving the garbage within the casing, the housing having a grip for facilitating the taking out thereof at the upper portion thereof, suction flow paths for the garbage constructed doubly by a brush suction opening formed at the lower portion of the housing for sucking the garbage collected at the upper portion of the brush and a dust collecting suction opening formed at the rear of the brush for vacuum sucking the garbage, the brush suction opening and the dust collecting suction opening being connected to one side of the housing by means of a distributor to thereby suck and collect the garbage within the housing, and a cleanable anti-fungal filter connected to one side of the distributor with installing a packing at a connection portion for preventing the leakage of the air to thereby filter the collected garbage; and a suction device having a suction opening for vacuum sucking the garbage and formed with an anti- fungal filter sealed by the packing of the dust collecting portion and the packing for preventing the leakage of the air, and a fan rotated by the driving of a suction motor installed at the inside of the suction opening for producing the vacuum suction force.

[22] Further, according to the cleaning robot having a double suction device of the present invention, the brush portion is formed with a sweeping device at the upper portion for removing the garbage collected in the rotating brush, and the sweeping device is formed to project toward the brush suction opening of the dust collecting portion connected to the rotating brush for collecting the garbage to extend into the inside of the brush.

[23] Also, according to the present invention, the dust collecting portion is formed with a suction skirt having a plurality of projecting flow paths formed at the end of the dust collecting suction opening connected to the suction device by the distributor at the rear side of the brush portion for sucking the garbage in the ground, and the suction skirt is formed of a soft material so that it cannot interfere with the moving of the cleaning robot when it contacts with the ground, and make it possible to suck the garbage on the ground with enhanced suction force by increasing the suction force doubly while producing the convection flow of the vacuum sucked air by means of the projecting flow paths formed at the suction skirt.

Advantageous Effects

[24] As described above, according to the cleaning robot having a double suction device of the present invention, a brush is formed at the lower portion of the cleaning robot for removing the garbage while rotating toward the center thereof, the robot being moved by means of the rotation of moving wheels while detecting obstacles by means of an infrared ray sensor, and a dust collecting opening is formed at a rear portion of the brush, and further the dust collecting opening and a suction opening of the brush formed above the brush are connected to a suction device for vacuum sucking the garbage, so that the garbage produced by the brush and the garbage sucked through the dust collecting suction opening can be doubly sucked by means of the brush and the dust collecting suction opening and concentrated at the inside of a housing for the dust collecting portion provided with an anti- fungal filter by the vacuum suction force produced from the suction device, to thereby make it possible to minimize the production cost and maximize the cleaning effect by accomplishing the double cleaning effect by means of one suction device.

[25] Also, according to the cleaning robot having a double suction device of the present invention, it is possible to minimize the surrounding pollution due to the arrangement of the brush to realize clear finish cleaning to thereby increase the cleaning efficiency, by constructing that the brush for removing the garbage with rotation by the operation of a brush-motor can be stopped above all, if the cleaning robot stops its work of cleaning, so that garbage produced from the stop of the brush can be removed doubly through the brush suction opening formed above the brush and the dust collecting suction opening formed at the rear of the robot.

[26] Further, according to the cleaning robot having a double suction device of the present invention, it is possible to increase the cleaning efficiency by sucking the garbage on the ground with enhanced suction force and producing friction with the ground, which is accomplished by constructing that a suction skirt formed with flow paths is made of soft material which does not obstruct the moving of the robot in spite of its contact with the ground, the flow paths projecting toward a suction side of the dust collecting suction opening connected with the suction device for vacuum sucking the garbage by the rotation of a fan, to thereby double the suction force by producing a convection flow of an air sucked through the projecting flow paths formed at the suction skirt.

[27] In addition, according to the cleaning robot having a double suction device, it is possible to increase the dust collecting efficiency of the brush with simple structure and minimize the disperse of the garbage due to the rotation of the brush to thereby reduce the air pollution in the cleaning area by installing a dust collecting blade at a lower portion of the cleaning robot for collecting the garbage dispersed by the brush and guiding the garbage toward the suction opening of the brush, the dust collecting blade being spaced apart from the ground by a desired interval toward the rear of the brush rotated by the operation of the brush-motor and receiving the garbage therein.

[28] Also, according to the cleaning robot having a double suction device of the present invention, it is possible to improve the cleanliness in the cleaning area by removing the dirties formed during the rotation of the brush, by projectively forming a sweeping device at the lower portion of the cleaning robot above the brush, which is rotated by the operation of the brush motor and receives the garbage, for shaking off the dirties toward the suction opening of the brush.

[29] Further, according to the present invention, it is possible to increase the cleaning efficiency of the cleaning robot by producing the cleaning effect while striking fiber materials such as those of a carpet by means of the upward and downward vibration rotation of the brush, which is rotated by a brush motor having a vibration shaft vibrating upwardly and downwardly at the center thereof, and coupled to a lower portion of the cleaning robot, and is operated for receiving the garbage, and to increase the general usage of the cleaning robot by forming the brush detachably to thereby make it easy to replace the brush adapted for the usage depending on the position and place.

[30] In addition, according to the present invention, it is possible to minimize the cleaning exclusion area produced outside of the rotation radius of the cleaning robot, which is operated to perform cleaning with rotation movement, to thereby increase the cleaning efficiency, by forming an assistant brush for collecting the garbage toward the brush and being rotated by an assistant motor, at the front side of the brush positioned at the lower portion of the cleaning robot.

[31] Further, according to the present invention, it is possible to create clean circumstances of the inside of a room by spraying an anti-fungal material to an antifungal filter formed at a dust collecting portion comprised of a brush and a dust collecting suction opening for filtering the garbage to suppress the increase of the harmful bacteria and make it possible to replace and perform water cleaning to thereby maintain the cleanliness of the inside of the room easily.

[32] Also, according to the present invention, a suction device operating to vacuum suck the garbage by the suction force produced from the rotation of a fan driven by a suction motor is installed at a dust collecting portion comprised of a brush and a dust collecting suction opening for filtering and receiving the garbage with an anti-fungal filter, so that it is possible to increase the durability of the cleaning robot and minimize the breakdown to thereby reduce the maintaining and repair costs by connecting an engagement portion between the dust collecting portion and the suction device with a sealing packing to prevent the leakage of the garbage, which is produced by the application of a strong suction pressure at the above engagement portion, to thereby protect the inside of the cleaning robot from being contaminated. Brief Description of the Drawings

[33] FIG. 1 is a bottom perspective view of a cleaning robot having a double suction device according to the present invention;

[34] FIG. 2 is a cross-sectional view of a cleaning robot having a double suction device of the present invention;

[35] FIG. 3 is a partially cut enlarged cross-sectional view of a cleaning robot having a double suction device of the present invention;

[36] FIG. 4 is an exploded perspective view showing an a brush exploded from a cleaning robot having a double suction device of the present invention;

[37] FIG. 5 is an exploded perspective view of a dust collecting portion exploded from a cleaning robot having a double suction device of the present invention;

[38] FIG. 6 is a perspective view showing a dust collecting portion in a cleaning robot having a double suction device of the present invention;

[39] FIG.7 is a perspective view showing a state of an anti-fungal filter exploded from a dust collecting portion in a cleaning robot having a double suction device of the present invention;

[40] FIG. 8 is a perspective view showing an exploded state of a suction device in a cleaning robot having a double suction device of the present invention;

[41] FIG. 9 is a perspective view showing an exploded state of a dust collecting portion in a cleaning robot having a double suction device of the present invention. Best Mode for Carrying Out the Invention

[42] Hereinafter, the preferred embodiments of the present invention will be explained with reference to the appended drawings below.

[43] FIG. 1 is a bottom perspective view of a cleaning robot having a double suction device according to the present invention, FIG. 2 is a cross-sectional view of a cleaning robot having a double suction device of the present invention, FIG. 3 is a partially cut enlarged cross-sectional view of a cleaning robot having a double suction device of the present invention, FIG. 4 is an exploded perspective view showing an a brush exploded from a cleaning robot having a double suction device of the present invention, FIG. 5 is an exploded perspective view of a dust collecting portion exploded from a cleaning robot having a double suction device of the present invention, FIG. 6 is a perspective view showing a dust collecting portion in a cleaning robot having a double suction device of the present invention, FIG.7 is a perspective view showing a state of an antifungal filter exploded from a dust collecting portion in a cleaning robot having a double suction device of the present invention, FIG. 8 is a perspective view showing an exploded state of a suction device in a cleaning robot having a double suction device of the present invention, and FIG. 9 is a perspective view showing an exploded state of a dust collecting portion in a cleaning robot having a double suction device of the present invention. [44] As shown in FIG. 1 to FIG. 9, the cleaning robot having the double suction device of the present invention is comprised of a casing 110 moved by a running wheels 111, a brush portion 120 installed at the lower portion of the casing 110 for collecting the garbage, a dust collecting portion 130 comprised of a brush suction opening 134 formed at the upper portion of the brush portion 120 for collecting the garbage within a housing 131 installed in the casing 110 and a dust collecting suction opening 135 formed at the rear of a brush 121, the brush suction opening 134 and the dust collecting suction opening 135 being connected by a distributor 133, so that the garbage can be sucked and collected through the two suction openings 134, 135, and a suction device 140 installed at one side of the dust collecting portion 130 for supplying the vacuum suction force to the brush suction opening 134 and the dust collecting suction opening 135.

[45] In this instance, the casing 110 is constructed that the wheel type running wheels

111 are installed to rotate and move along the lower both sides of the casing, the running wheels being supported by a plurality of supporting wheels 112 provided at the lower portion of the casing, an infrared ray sensor 114 is installed at the front surface of the casing in the radial direction for detecting the position of the obstacles, a bumper is installed at the front side thereof for mitigating the impact produced upon the contact with the obstacles, and am electric power supply portion 115 is installed at the rear side thereof for supplying the electric power.

[46] The brush portion 120 is formed with a brush 121 at the lower center of the casing

110 by means of a vibration shaft 122 moving upwardly and downwardly, one end of the brush 121 and a brush motor being connected by means of a coupling 123 so that the brush can rotate and vibrate upwardly and downwardly, and a plate type blade 125 is installed at the rear of the rotating brush 121 to be positioned at a desired height from the ground to thereby collect the garbage dispersed from the brush 121 and guide to the upper portion of the casing.

[47] Here, the brush portion 120 is preferably formed with a sweeping device 126 at the upper portion for removing the garbage collected in the rotating brush 121, the sweeping device formed projectively toward the brush suction opening 134 of the dust collecting portion 130 connected to the rotating brush 121 for collecting the garbage to extend into the inside of the brush 121.

[48] The dust collecting portion 130 is formed with a housing 131 having a grip 132 for facilitating the taking out of it at the upper portion for receiving the garbage within the casing 110. In this regard, suction passages for the garbage are constructed doubly by the brush suction opening 134 formed at the lower portion of the housing 131 for sucking the garbage collected at the upper portion of the brush 121 and the dust collecting suction opening 135 formed at the rear portion of the brush 121 for vacuum sucking the garbage, so that they can be connected to one side of the housing 131 by means of a distributor 133 to thereby suck and collect the garbage within the housing 131. Also, a cleanable anti-fungal filter 137 is connected to one side of the distributor 133 with installing a packing 138 at a connection portion for preventing the leakage of the garbage to thereby filter the collected garbage.

[49] Here, the dust collecting portion 130 is preferably comprised of a suction skirt 136 having a plurality of projecting flow paths 136a formed at the end of the dust collecting suction opening 135 connected to the suction device 140 by the distributor

133 at the rear side of the brush portion 120 for sucking the garbage in the ground, the suction skirt 136 being formed of a soft material so that it cannot interfere with the moving of the cleaning robot when it contacts with the ground. Accordingly, it is possible to suck the garbage on the ground with enhanced suction force by increasing the suction force doubly while producing the convection flow of the vacuum sucked air by means of the projecting flow paths 136a formed at the suction skirt 136.

[50] The suction device 140 is comprised of the anti-fungal filter 137 sealed by the packing 138 of the dust collecting portion 130 and a packing 144 for preventing the leakage of the garbage to thereby form a suction opening 143 for vacuum sucking the garbage, and a fan 142 rotated by the driving of a suction motor 141 is installed at the inside of the suction opening 143 for producing the vacuum suction force.

[51] Hereinafter, the operation of the cleaning robot having the double suction device as constructed above will be explained below.

[52] At first, when the electric power is supplied from the electric power supply portion

115, the brush motor 124 of the brush portion 120 is rotated to vibrate upwardly and downwardly and rotate the brush 121 coupled to the brush motor by means of the coupling 123 through the rotation of the vibration shaft 122. In this instance, at the dust collecting portion 130 having the grip 132 for collecting the garbage, the suction device 140 for producing the vacuum suction force at the suction opening 143 by driving the suction motor 141 to thereby rotate the fan 142 is coupled to the anti-fungal filter 137 of the dust collecting portion 130 to filter and vacuum suck the garbage.

[53] In this instance, the packings 138, 144 are installed at the inside of the anti-fungal filter 137 of the dust collecting portion 130 and suction opening 143 of the suction device 140 to thereby minimize the leakage of the sucked air by means of the strong suction force. As described above, when the vacuum suction force of the suction device 140 is produced with the rotation of the brush 121, the brush suction opening

134 formed at the upper portion of the brush 121 for sucking the collected garbage and the dust collecting suction opening 135 formed at the rear of the brush 121 for sucking the garbage by means of the vacuum suction force are connected by the distributor 133 of the dust collecting portion 130 to thereby combine the brush suction opening 134 and the dust collecting suction opening 135 received into one suction flow path to suck the garbage by means of the vacuum suction force of the dust collecting portion 130 and the suction device 140.

[54] In this instance, the suction skirt 136 having a plurality of projecting flow paths

136a extending to the end of the dust collecting suction opening 135 is formed of a soft material which does not interfere with the moving of the cleaning robot when it contacts with the ground, so that the projecting flow paths 136a formed at the suction skirt 136 can produce a convection flow of the sucked air to thereby double the suction force and suck the garbage on the ground with enhanced suction force and with producing friction with the ground.

[55] Further, as the brush portion 120 is formed with a sweeping device 126 projecting toward the brush suction opening 134 of the dust collecting portion 130 and connected to the rotating brush 121 for collecting the garbage to extend into the inside of the brush 121 so that it can remove the garbage collected in the rotating brush 121 clearly.

[56] As described above, the garbage collected by the rotation of the brush portion 120 is sucked through the brush suction opening 134, and also the garbage is sucked doubly through the dust collecting suction opening 135 by means of the suction force doubled by the suction skirt 136 formed at the rear of the brush 121. In this instance, the cleaning robot is moved along a predetermined path while being supported from the ground by the supporting wheels 112 driven by the running wheels 111 installed at the casing 110.

[57] Thus, when the cleaning robot 100 initiates its movement, obstacles are detected by the infrared ray sensor 114 installed at the front of the casing, and the cleaning robot 100 moves while buffering the impact and minimizing the breakage produced at the time of contact with the obstacles, and when it rotates at the time of running around a corner part or meeting the obstacles, cleaning of the area without the cleaning range of the brush 121 and the dust collecting suction opening 135 can be performed by the rotation of an assistant brush 127 installed at the front of the brush 121.

[58] As described above, if the cleaning has been completed, the brush portion 120 is stopped at first, and the dust collecting portion 130 and the suction device 140 are constructed to be stopped after the stop of the brush 121 to thereby suck the garbage discharged from the brush 121 and complete the cleaning. Industrial Applicability

[59] As described above, according to the cleaning robot having the double suction device of the present invention, it is possible to increase the cleaning efficiency.

[60] While the present invention has been described with reference to the preferred embodiments, the present invention is not limited by the embodiments. It is to be understood that those skilled in the art can change or modify the embodiments without departing from the scope and spirit of the present invention. However, such variations and modifications are all pertained to the scope of the present invention.

Claims

[1] A cleaning robot having a double suction device comprising: a casing 110 formed with wheel type running wheels 111 configured to rotate and move along the lower both sides of the casing, the running wheels supported by a plurality of supporting wheels 112 provided at the lower portion of the casing, an infrared ray sensor 114 installed at the front of the casing in the radial direction for detecting the position of the obstacles, a bumper installed at the front thereof for mitigating the impact produced upon the contact with the obstacles, and an electric power supply portion 115 installed at the rear side thereof for supplying the electric power; a brush portion 120 formed with a brush 121 at the lower center of the casing 110 by means of a vibration shaft 122 moving upwardly and downwardly, one end of the brush 121 and a brush motor being connected by means of a coupling 123 so that the brush can rotate and vibrate upwardly and downwardly, and a plate type blade 125 installed at the rear of the rotating brush 121 to be positioned at a desired height from the ground to thereby collect the garbage dispersed from the brush 121 and guide to the upper portion of the casing; a dust collecting portion 130 formed with a housing 131 for receiving the garbage within the casing 110, the housing having a grip 132 for facilitating the taking out thereof at the upper portion thereof, suction flow paths for the garbage constructed doubly by a brush suction opening 134 formed at the lower portion of the housing 131 for sucking the garbage collected at the upper portion of the brush 121 and a dust collecting suction opening 135 formed at the rear of the brush 121 for vacuum sucking the garbage, the brush suction opening and the dust collecting suction opening being connected to one side of the housing 131 by means of a distributor 133 to thereby suck and collect the garbage within the housing 131, and a cleanable anti- fungal filter 137 connected to one side of the distributor 133 with installing a packing 138 at a connection portion for preventing the leakage of the air to thereby filter the collected garbage; and a suction device 140 having a suction opening 143 for vacuum sucking the garbage and formed with an anti-fungal filter 137 sealed by a packing 138 of the dust collecting portion 130 and a packing 144 for preventing the leakage of the air, and a fan 142 rotated by the driving of a suction motor 141 installed at the inside of the suction opening 143 for producing the vacuum suction force.

[2] The cleaning robot having a double suction device according to claim 1, wherein the brush portion 120 is formed with a sweeping device 126 at the upper portion for removing the garbage collected in the rotating brush 121, and the sweeping device is formed to project toward the brush suction opening 134 of the dust collecting portion 130 connected to the rotating brush 121 for collecting the garbage to extend into the inside of the brush 121.

[3] The cleaning robot having a double suction device according to claim 1, wherein the dust collecting portion 130 is formed with a suction skirt 136 having a plurality of projecting flow paths 136a formed at the end of the dust collecting suction opening 135 connected to the suction device 140 by the distributor 133 at the rear side of the brush portion 120 for sucking the garbage in the ground, and the suction skirt 136 is formed of a soft material so that it cannot interfere with the moving of the cleaning robot when it contacts with the ground, and make it possible to suck the garbage on the ground with enhanced suction force by increasing the suction force doubly with producing the convection flow of the vacuum sucked air by means of the projecting flow paths 136a formed at the suction skirt 136.