Patent Publication Number: US-9840400-B2

Title: Sterilization and cleaning system of escalator

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application claims the priority benefit of Taiwan application serial no. 104105292, filed on Feb. 16, 2015. The entirety of the above-mentioned patent application is hereby incorporated by reference herein and made a part of this specification. 
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The invention relates to a sterilization and cleaning system, and particularly relates to a sterilization and cleaning system of an escalator. 
     2. Description of Related Art 
     Escalators are commonly used in shopping malls, hypermarkets, department stores, and other public areas to take the users to different floors. Generally speaking, the users usually hold the handrail of the escalator or lean against the handrail of the escalator with their arms, so as to prevent themselves from falling down when taking the escalator. After being used for a certain period of time, the handrail of the escalator may become dirty, and there may be genus on the handrails. Thus, when the users hold or lean against the handrail of the escalator with their hands or arms, users&#39; hands or anus may carry the dirt and germs. Conventionally, the handrail of the escalator is cleaned manually, and is normally cleaned and sterilized when there are fewer people in the public areas or when the public areas are closed. Thus, the effect of cleaning and sterilization is not preferable. 
     Thus, how to develop a system that automatically and regularly sterilizes and cleans the handrail of the escalator becomes an issue to work on. In the meantime, since there are many people in the public areas, how to incorporate the concept of the Internet of Things into the sterilization and cleaning system, so as to control the sterilization and cleaning system, calculate and control the traffic of people, or transmit and broadcast messages in the form of video, text, or image in addition to automatically cleaning and sterilizing the handrail of the escalator, thereby creating a more significant business effect, has become an issue for future development. 
     SUMMARY OF THE INVENTION 
     The invention provides a sterilization and cleaning system of an escalator not only capable of automatically sterilizing and cleaning a handrail of an escalator, but also capable of controlling the sterilization and cleaning system, calculating and controlling the traffic of people, or transmitting or displaying information in the form of video, text, or image through a cloud server. 
     The invention provides a sterilization and cleaning system of an escalator, including a first body, a counting wheel, a controller, a second body, and a cloud server. The first body includes a first tank and a first atomizer. The first tank stores a first sterilization and cleaning liquid. The first atomizer is connected to the first tank and adapted to atomize the first sterilization and cleaning liquid in the first tank and spray the atomized first sterilization and cleaning liquid to a handrail of the escalator. The counting wheel is pivoted on the first body and abuts against the handrail, so as to synchronously rotate as the handrail operates. The controller is electrically coupled to the first atomizer. The second body is disposed side by side with the first body and includes a projector, a sensor, and a wireless transmission module. The projector is electrically coupled to the controller. The sensor is electrically coupled to the controller and faces a passage of the escalator to sense a person passing through the passage. The wireless transmission module is electrically coupled to the controller and the sensor. The cloud server is adapted to communicate with the wireless transmission module. 
     According to an embodiment of the invention, the first tank has an opening and a bottom opposite to the opening. The first atomizer includes an atomizing nozzle and an absorber connected to the atomizing nozzle. The atomizing nozzle is disposed at the opening and electrically coupled to the controller. The absorber extends from the opening toward the bottom to provide the first sterilization and cleaning liquid to the atomizing nozzle. 
     According to an embodiment of the invention, the first body further includes a level monitor. The level monitor is electrically coupled to the controller to monitor a liquid level of the first sterilization and cleaning liquid in the first tank. 
     According to an embodiment of the invention, when the level monitor detects that the liquid level is lower than a predetermined value, the controller stops the first atomizer from atomizing the first sterilization and cleaning liquid and sends a warning signal to the cloud server. 
     According to an embodiment of the invention, the counting wheel includes a shaft rod, a wheel, and a counter. The shaft rod is pivoted on the first body. The wheel is sleeved on the shaft rod and abuts against the handrail, so as to synchronously rotate as the handrail operates. The counter is electrically coupled to the controller. In addition, the counter is disposed corresponding to the wheel to calculate an operation distance of the handrail. 
     According to an embodiment of the invention, the counter is adapted to transmit the operation distance of the handrail to the controller, such that the controller controls a period that the first atomizer atomizes the first sterilization and cleaning liquid and sprays the atomized first sterilization and cleaning liquid to the handrail of the escalator based on the operation distance. 
     According to an embodiment of the invention, the sensor is adapted to transmit the number of the person passing through the passage to the controller, such that the controller controls a period that the first atomizer atomizes the first sterilization and cleaning liquid and sprays the atomized first sterilization and cleaning liquid to the handrail of the escalator based on the number of the person passing through the passage. 
     According to an embodiment of the invention, the sensor is adapted to transmit the number of the person passing through the passage to the cloud server through the wireless transmission module. 
     According to an embodiment of the invention, the sensor is adapted to notify the cloud server through the wireless transmission module when sensing that the person passes through the passage, such that the cloud server pushes a message to a mobile device of the person passing through the passage through the wireless transmission module. 
     According to an embodiment of the invention, after the wireless transmission module establishes connection with a mobile device of the person passing through the passage, the cloud server is adapted to push a message to the mobile device of the person passing through the passage through the wireless transmission module. 
     According to an embodiment of the invention, the cloud server is adapted to transmit digital information to the wireless transmission module and the digital information is transmitted to the controller by the wireless transmission module, such that the controller controls projection of the projector based on the digital information. 
     According to an embodiment of the invention, a transmission of the wireless transmission module includes infrared transmission, radio transmission, bluetooth transmission, or wireless fidelity transmission. 
     According to an embodiment of the invention, the sterilization and cleaning system of the escalator further includes a power supply module. The power supply module is detachably disposed between the first body and the second body and adapted to provide power to the first body, the controller, and the second body. 
     According to an embodiment of the invention, the sterilization and cleaning system of the escalator further includes a display module disposed side by side with the first body and the second body. The display module includes a frame body and a display. The frame body has a base, a top plate opposite to the base, and a sliding track between the base and the top plate. The display is slidably disposed in the sliding track, and electrically coupled to the controller. The cloud server is adapted to transmit digital information to the wireless transmission module and the digital information is transmitted to the controller by the wireless transmission module, such that the controller controls an image displayed on the display based on the digital information. 
     According to an embodiment of the invention, the display module further includes a second atomizer. The second atomizer is disposed in a chamber of the top plate and electrically coupled to the controller. The frame body further includes a second tank located at the base and storing a second sterilization and cleaning liquid and a pipe connecting the chamber and the second tank. In addition, the pipe is connected to the second atomizer and adapted to provide the second sterilization and cleaning liquid to the second atomizer, such that the atomized second sterilization and cleaning liquid is sprayed to an external environment via a plurality of openings connected with the chamber after the second atomizer atomizes the second sterilization and cleaning liquid. 
     According to an embodiment of the invention, the counter is adapted to transmit the operation distance of the handrail to the controller, such that the controller controls a period that the second atomizer atomizes the second sterilization and cleaning liquid and sprays the atomized second sterilization and cleaning liquid to the external environment via the openings based on the operation distance. 
     According to an embodiment of the invention, the sensor is adapted to transmit the number of the person passing through the passage to the controller, such that the controller controls a period that the second atomizer atomizes the second sterilization and cleaning liquid and sprays the atomized second sterilization and cleaning liquid to the external environment via the openings based on the number of the person passing through the passage. 
     According to an embodiment of the invention, the display module further includes at least one solar energy panel disposed at the top plate of the frame body. 
     According to an embodiment of the invention, the sterilization and cleaning system of the escalator further includes a display module disposed side by side with the first body and the second body. The display module includes a frame body, a base, and a display. The frame body is inserted into or pivoted to the base. The frame body has a top part opposite to the base. The display, having a pivot part, and the display is pivoted to the top part by using the pivot part for rotating with respect to the frame body. The display is electrically coupled to the controller, and the cloud server is adapted to transmit digital information to the wireless transmission module and the digital information is transmitted to the controller by the wireless transmission module, such that the controller controls an image displayed on the display based on the digital information. 
     According to an embodiment of the invention, the first body, the counting wheel, and the second body are embedded in a transport base of the escalator. 
     According to an embodiment of the invention, the controller is embedded in a transport base of the escalator. 
     Based on above, the embodiments of the invention provide the sterilization and cleaning system of the escalator including the first body, the counting wheel, the controller, the second body, and the cloud server. The cloud server is adapted to communicate with the wireless transmission module in the second body for two-way data transmission. More specifically, the first atomizer is disposed in the first body, and the controller controls the first atomizer to atomize the first sterilization and cleaning liquid in the first tank, such that the atomized first sterilization and cleaning liquid is sprayed to the handrail of the escalator, thereby automatically sterilizing and cleaning the handrail of the escalator. Furthermore, the cloud server is adapted to transmit digital information to the wireless transmission module, and the digital information is transmitted to the controller by the wireless transmission module, so that the controller may control the projection of the projector of the second body based on the digital information. For example, the projector may project relevant advertisement information or public information in the form of video, image, or text, for example, to the ground near the entrance or the exit of the passage of the escalator or to a wall, a ceiling, a projection billboard correspondingly disposed for people to view. 
     Moreover, the sensor also transmits the number of the person passing through the passage to the cloud server through the wireless transmission module for controlling and calculating the traffic of people. When the sensor senses that the person passes through the passage of the escalator, the sensor may notify the cloud server through the wireless transmission module, such that the cloud server may push a message to a portable system (e.g., a smartphone or a tablet computer) of the person passing through the passage through the wireless transmission module for the person to view. For example, the message may be advertisement information or public information, and the control and calculation of the traffic of people may serve as an evaluation on an effect of the advertisement or propaganda. 
     In order to make the aforementioned and other features and advantages of the invention comprehensible, several exemplary embodiments accompanied with figures are described in detail below. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The accompanying drawings are included to provide further understanding, and are incorporated in and constitute a part of this specification. The drawings illustrate exemplary embodiments and, together with the description, serve to explain the principles of the disclosure. 
         FIG. 1  is a schematic view illustrating a sterilization and cleaning system of an escalator according an embodiment of the invention. 
         FIG. 2  is a schematic cross-sectional view of a first body shown in  FIG. 1  along a cross-sectional line A-A. 
         FIG. 3  is a schematic view illustrating the sterilization and cleaning system of the escalator of  FIG. 1  being mounted in an escalator. 
         FIG. 4  is a schematic view illustrating connections of the sterilization and cleaning system of the escalator of  FIG. 1 . 
         FIGS. 5A and 5B  are schematic views illustrating a sterilization and cleaning system of an escalator according another embodiment of the invention. 
         FIG. 5C  is a schematic view illustrating connections of the sterilization and cleaning system of the escalator of  FIG. 5A . 
         FIGS. 6A and 6B  are schematic views illustrating a sterilization and cleaning system of an escalator according another embodiment of the invention. 
         FIG. 6C  is a schematic view illustrating connections of the sterilization and cleaning system of the escalator of  FIG. 6A . 
         FIG. 7  is a schematic view illustrating a sterilization and cleaning system of an escalator according another embodiment of the invention. 
     
    
    
     DESCRIPTION OF THE EMBODIMENTS 
     Reference will now be made in detail to the embodiments of the disclosure, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers are used in the drawings and the description to refer to the same or like parts. 
       FIG. 1  is a schematic view illustrating a sterilization and cleaning system of an escalator according an embodiment of the invention.  FIG. 2  is a schematic cross-sectional view of a first body shown in  FIG. 1  along a cross-sectional line A-A.  FIG. 3  is a schematic view illustrating the sterilization and cleaning system of the escalator of  FIG. 1  being mounted in an escalator.  FIG. 4  is a schematic view illustrating connections of the sterilization and cleaning system of the escalator of  FIG. 1 . Referring to  FIGS. 1 to 4 , in this embodiment, a sterilization and cleaning system  100  of an escalator includes a first body  110 , a counting wheel  120 , a controller  130 , a second body  140 , and a cloud server  150 . The first body  110 , the counting wheel  120 , the controller  130 , and the second body  140  form a main apparatus  101 , for example. The main apparatus  101  is adapted to be installed at an entrance  12  or an exit (not shown) of a passage  11  of an escalator  10 , and is disposed at a lower end of the escalator  10 , for example. However, the invention is not limited thereto. In another embodiment, the main apparatus  101  formed by the first body  110 , the counting wheel  120 , the controller  130 , and the second body  140  may also be embedded in a transport base  13  of the escalator  10 . In yet another embodiment, only the first body  110 , the counting wheel  120 , and the second body  140  are embedded in the transport base  13  of the escalator  10 , and the controller  130  may be externally disposed at the transport base  13 , for example. 
     The first body  110  is mainly adapted for cleaning and sterilization, and includes a case  111 , a first tank  112 , and a first atomizer  113 . The case  111  has an opening  111   a . The first tank  112  is located in the case  111 . In addition, the opening  111   a  is aligned with an opening  112   a  of the first tank  112 , and the first tank  112  stores a first sterilization and cleaning liquid L 1 . The first atomizer  113  is connected to the first tank  112 . In addition, the first atomizer  113  may include an atomizing nozzle  113   a  and an absorber  113   b  connected to the atomizing nozzle  113   a . The atomizing nozzle  113   a  is an ultrasonic atomizing nozzle, for example, and the absorber  113   b  is an absorbing sponge, for example. Specifically, the atomizing nozzle  113   a  is disposed at the openings  111   a  and  112   a , and electrically coupled to the controller  130 . Besides, the absorber  113   b  extends from the opening  112   a  toward a bottom  112   b  of the first tank  112 , so as to provide the first sterilization and cleaning liquid L 1  to the atomizing nozzle  113   a . In addition, the opening  112   a  and the bottom  112   b  are opposite to each other. The controller  130  is adapted to provide a control signal to the atomizing nozzle  113   a , such that the atomizing nozzle  113   a  starts atomizing the first sterilization and cleaning liquid L 1  provided by the absorber  113   b  and spraying the atomized first sterilization and cleaning liquid L 1  to a handrail  14  of the escalator  10 . In other words, the atomizing nozzle  113   a  is disposed corresponding to the handrail  14  of the escalator  10 , so as to effectively perform a sterilization and cleaning operation. 
     In another embodiment, the first atomizer  113  may also be formed by only an ultrasonic nozzle. Under this circumstance, the ultrasonic nozzle may directly contact the first sterilization and cleaning liquid L 1 . Thus, the first sterilization and cleaning liquid L 1  may still be atomized to be sprayed to the handrail  14  without using the absorber  113   b  to provide the first sterilization and cleaning liquid L 1 . In addition, to verify whether the first atomizer  113  functions normally (i.e., atomizing the first sterilization and cleaning liquid L 1  and spraying the atomized first sterilization and cleaning liquid L 1  to the handrail  14 ), a humidity sensor may be optionally disposed near the atomizing nozzle  113   a . The humidity sensor is located between the atomizing nozzle  113   a  and the handrail  14 , for example, to sense a humidity state around the atomizing nozzle  113   a.    
     The counting wheel  120  is pivoted on the case  111  of the first body  110 , and abuts against the handrail  14 , so as to synchronously rotate as the handrail  14  operates. More specifically, the counting wheel  120  includes a shaft rod  121 , a wheel  122 , and a counter  123 . One end of the shaft rod  121  is pivoted on the case  111  of the first body  110 , and the other end of the shaft rod  121  is pivoted on a pivot base  114 . The wheel  122  is sleeved on the shaft rod  121  (or the shaft rod  121  passes through the wheel  122 ) and abuts against the handrail  14 . Thus, when the handrail  14  operates, the wheel  122  may synchronously rotate with the handrail  14  through the shaft rod  121 . The counter  123  is an optoelectronic sensor, for example, and electrically coupled to the controller  130 . In addition, the counter  123  is disposed corresponding to the wheel  122 , and a sensor tab  122   b  is attached to a spoke  122   a  of the wheel  122 . In other words, the counter  123  calculates the number of turns that the wheel  122  rotates based on the number that the spoke  122   a  where the sensor tab  122   b  is attached passes, so as to derive an operation distance of the handrail. 
     The calculator  123  is adapted to transmit the operation distance of the handrail  14  to the controller  130 , such that the controller  130  may control a period that the first atomizer  113  to atomize the first sterilization and cleaning liquid L 1  and spray the atomized first sterilization and cleaning liquid L 1  to the handrail  14  of the escalator  10  based on the operation distance. In other words, spraying of the atomized first sterilization and cleaning liquid L 1  is not continuous without interruption. Instead, after each spraying (lasting several minutes, for example), the controller  130  may transmit a stop signal to the first atomizer  113 , such that the first atomizer  113  may temporarily stop atomizing the first sterilization and cleaning liquid L 1 . Then, after the first atomizer  113  stops spraying the atomized first sterilization and cleaning liquid L 1  and the operation distance calculated by the counter  123  reaches a predetermined value, the controller  130  may send a start signal to the first atomizer  113 , such that the first atomizer  113  may perform the operation of atomizing the first sterilization and cleaning liquid L 1  and spraying the atomized first sterilization and cleaning liquid L 1  to the handrail  14  of the escalator  10  again. In other embodiments, the calculator  123  may also include a control unit electrically coupled to the first atomizer  113 . Under such circumstance, the counter  123  may control the period that the first atomizer  113  atomizes the first sterilization and cleaning liquid L 1  based on the operation distance of the handrail  14  by using the control unit. 
     The second body  140  and the first body  110  are disposed side by side, and the controller  130  is disposed between the second body  140  and the first body  110 , for example. In this embodiment, the second body  140  includes a case  141 , a projector  142 , a sensor  143 , and a wireless transmission module  144 . In addition, the projector  142 , the sensor  143 , and the wireless transmission module  144  are disposed in the case  141 . The projector  142  and the sensor  143  are electrically coupled to the controller  130 , and the wireless transmission module  144  is electrically coupled to the controller  130  and the sensor  143 . Also, the cloud server  150  is adapted to communicate with the wireless transmission module  144  for two-way data transmission. 
     More specifically, the cloud server  150  is adapted to transmit digital information to the wireless transmission module  144 , and the digital information is transmitted to the controller  130  by the wireless transmission module  144 , such that the controller  130  may control projection of the projector  142  based on the digital information. For example, the projector  142  may project relevant advertisement information or public information in the foam of video, image, or text, for example, to a ground near the entrance  12  or the exit (not shown) of the passage  11  of the escalator  10  for a person  20  passing through the passage  11  of the escalator  10  to view. However, the invention is not limited thereto. In another embodiment, the projector  142  may also project the relevant advertisement information or public information to a wall, a ceiling, a projection billboard correspondingly disposed, or other suitable positions in the environment. In yet another embodiment, the projector  142  may be a naked-eye three-dimensional projector to project the relevant advertisement information or public information in a space in the form of video, image, or text, for example. Moreover, the invention is not limited to an embodiment where the projector  142  is disposed in the case  141 . It is also possible to implement by externally disposing the projector  142  at the second body  140 . 
     Moreover, the sensor  143  may be an infrared sensor, a laser sensor, or other suitable optoelectronic sensors, for example. The sensor  143  faces the passage  11  of the escalator  10  to sense the person  20  passing through the passage  11 . For example, the sensor  143  is adapted to transmit the number of the person  20  passing through the passage  11  to the controller  130 , such that the controller  130  may control the period that the first atomizer  113  atomizes the first sterilization and cleaning liquid L 1  and sprays the atomized first sterilization and cleaning liquid L 1  to the handrail  14  of the escalator  10  based on the number of the person  20  passing through the passage  11 . In other words, spraying of the atomized first sterilization and cleaning liquid L 1  is not continuous without interruption. Instead, after each spraying (lasting several minutes, for example), the controller  130  may transmit a stop signal to the first atomizer  113 , such that the first atomizer  113  may temporarily stop atomizing the first sterilization and cleaning liquid L 1 . Then, after spraying of the atomized first sterilization and cleaning liquid L 1  is stopped, and the sensor  143  senses that the number of the person  20  passing through the passage  11  reaches the predetermined value, the controller  130  may send a start signal to the first atomizer  113 , such that the first atomizer  113  may perform the operation of atomizing the first sterilization and cleaning liquid L 1  and spraying the first atomized sterilization and cleaning liquid L 1  to the handrail  14  of the escalator  10  again. 
     It should be noted that the operation that the first atomizer  113  atomizes the first sterilization and cleaning liquid may be accomplished by sending a control signal from the cloud server to the controller  130  for the controller  130  to control the first atomizer  113  based on the control signal. Alternatively, the cloud server may directly send a control signal to control the first atomizer  113  without using the controller  130 . 
     Meanwhile, the sensor  143  also transmits the number of the person  20  passing through the passage  11  to the cloud server  150  through the wireless transmission module  144  for controlling and calculating the traffic of people. Also, when the sensor  143  senses that the person  20  passes through the passage  11 , the sensor  143  may notify the cloud server  150  through the wireless transmission module  144 , such that the cloud server  150  may push a message through the wireless transmission module  144  to a mobile device  30  (e.g., a smartphone or a tablet computer) of the person  20  passing through the passage  11  for the person  20  to view. For example, the message may be advertisement information or public information, and the control and calculation of the traffic of people may serve as an evaluation on an effect of the advertisement or propaganda. In general, the transmission of the wireless transmission module  144  may include infrared transmission, radio transmission, bluetooth (e.g., low-power bluetooth) transmission, or wireless fidelity (Wi-Fi) transmission. Alternatively, a wireless mobile communication unit (e.g., a GSM, GPRS, 3G, or 4G system) may be used for communication and transmission. It should be understood that the invention does not intend to impose a limitation in this regard. 
     In another embodiment, a wireless transmission module (not shown) of the mobile device  30  of the person  20  passing through the passage  11  is adapted to establish connection with the wireless transmission module  144  within a predetermined distance. After the wireless transmission module (not shown) of the mobile device  30  is matched and connected with the wireless transmission module  144 , the cloud server  150  may push a message to the mobile device  30 . Here, the message may be pushed through the following mechanisms. First, a network app may be installed in the mobile device  30 , and after the wireless transmission module (not shown) of the mobile device  30  is matched and connected to the wireless transmission module  144 , the network app may send a request signal to the wireless transmission module  144 . When receiving the request signal, the wireless transmission module  144  may return physical location digital information to the network app. Then, the network app may connect with the cloud server  150  and transmit corresponding digital contents to the network app to be displayed based on the physical location digital information. Second, a network app may be installed in the mobile device  30 , and after the wireless transmission module (not shown) of the mobile device  30  is matched and connected to the wireless transmission module  144 , the wireless transmission module  144  may send a request signal to the cloud server  150 . When receiving the request signal, the cloud server  150  may send connection location information to the mobile device  30 . Then, the network app may send another request signal to the cloud server  150 , such that the cloud server  150  may transmit digital contents to the mobile device  30  to be displayed based on the connection location information. 
     It should be noted that even though the wireless transmission module  144  is disposed in the second body  140  is this embodiment as an example, the invention is not limited thereto. For example, the wireless transmission module may also be disposed in the first body  110  so as to communicate with the cloud server  150 . 
     In this embodiment, the first body  110  further includes a level monitor  115  located in the first tank  112  and, for example, at a position relatively closer to a side where the opening  112   a  is located. In other words, the level monitor  115  is relatively away from a side where the bottom  112   b  is located. The level monitor  115  is electrically coupled to the controller  130  to monitor a liquid level of the first sterilization and cleaning liquid L 1  in the first tank  112 . When the level monitor  115  detects that the liquid level is lower than a predetermined level, the controller  130  may send a stop signal to the first atomizer  113 , so as to stop the first atomizer  113  from atomizing the first sterilization and cleaning liquid L 1 , and simultaneously send a warning signal to the cloud server  150  through the wireless transmission module  144 , so as to automatically or manually refill the first sterilization and cleaning liquid L 1 . For example, when a storage of the first sterilization and cleaning liquid L 1  in the first tank  112  is not enough, the first sterilization and cleaning liquid L 1  may be supplemented through an external opening (not shown) of the first tank  112 . Alternatively, the first tank  112  with an insufficient storage of the first sterilization and cleaning liquid L 1  is removed and replaced with a tank storing a certain amount of the sterilization and cleaning liquid for subsequent use. The invention does not intend to impose a limitation in this regard. 
     Moreover, the sterilization and cleaning system  100  of the escalator further includes a power supply module  160  that provides power to the first body  110 , the controller  130 , and the second body  140 . For example, the power supply module  160  may be fixed between the first body  110  and the second body  140 , or may be detachably disposed between the first body  110  and the second body  140 . It should be noted that a position where the power supply module  160  is disposed may be adjusted based on the needs, and is not limited to the position between the first body  110  and the second body  140 . More specifically, a power source of the power supply module  160  may be the commercial power or a battery. Here, the commercial power may be supplied from power provided for the escalator  10  to operate, for example. However, the invention is not limited thereto. Also, the battery is a solar cell, for example. Therefore, the sterilization and cleaning system  100  of the escalator may have a solar energy panel (not shown) adapted to receive ambient light for photovoltaic conversion. However, the invention is not limited thereto. Moreover, based on the needs, the battery may also be a storage battery or a chargeable battery. 
     In another embodiment, to improve the safety of people in public areas, an emergency button may be optionally disposed on the first body  110 , the second body  140 , or other external components, such that when there is an emergency, people in the public areas may push the button to notify relevant authorities (e.g., the police station or fire bureau). 
     As shown in  FIG. 1 , a security lock  145  may be installed in the second body  140 , so as to lock the first body  110 , the second body  140 , and other external components. Here, the second body  140  and other external components are locked at a specific position to abut against a magnetic reed switch (not shown) or a micro switch (not shown), for example. Specifically, when the second body  140  and other external components are correctly configured at a locking position to abut against the magnetic reed switch (not shown) or the micro switch (not shown), the security lock  145  may function normally to lock the first body  110 , the second body  140 , and other external components. Alternatively, when the second body  140  and other external components do not abut against the magnetic reed switch (not shown) or the micro switch (not shown), the security lock  145  is unable to lock the first body  110 , the second body  140 , and other external components. 
     In general, the cloud server  150  of this embodiment is capable of monitoring operating states of the first body  110  and the second body  140 . The operating states here refer to the traffic of people, the number of times that the person  20  installs the network app, the number of times that the person  20  retrieves the network app, the storage of the first sterilization and cleaning liquid L 1 , a locking state of the security lock  145 , a power storage of the power supply module  160 , and relevant data sensed by the monitor or sensor. Furthermore, another machine body, such as an advertisement display module, may be optionally disposed in the sterilization and cleaning system  100  of the escalator, and the cloud server  150  may also be configured to monitor a display mode of the advertisement display module and exert display control over the advertisement display module. However, the invention is not limited thereto. 
     Other embodiments are provided in the following for further descriptions. It should be noted that the reference numerals and a part of the contents in the previous embodiment are used in the following embodiments, in which identical reference numerals indicate identical or similar components, and repeated description of the same technical contents is omitted. For a detailed description of the omitted parts, reference can be found in the previous embodiment, and no repeated description is contained in the following embodiments. 
       FIGS. 5A and 5B  are schematic views illustrating a sterilization and cleaning system of an escalator according another embodiment of the invention.  FIG. 5C  is a schematic view illustrating connections of the sterilization and cleaning system of the escalator of  FIG. 5A . Referring to  FIGS. 5A to 5C , a sterilization and cleaning system  100 A of an escalator is substantially similar to the sterilization and cleaning system  100  of the escalator of the previous embodiment, and a main difference therebetween is that the sterilization and cleaning system  100 A of the escalator further includes a display module  170  disposed side by side with the first body  110  and the second body  140 . More specifically, the display module  170  includes a frame body  171  and a display  177 . In addition, the frame body  171  has a base  172 , a top plate  173  opposite to the base  172 , and a sliding track  174  between the base  172  and the top plate  173 . The display  177  is slidably disposed in the sliding track  174 , such that the display  177  is able to move back and forth in a state shown in  FIGS. 5A and 5B . 
     The display  177  is electrically coupled to the controller  130 . In addition, the cloud server  150  is adapted to transmit digital information to the wireless transmission module  144 , and the digital information is transmitted to the controller  130  by the wireless transmission module  144 , such that the controller  130  may control an image displayed on the display  177  based on the digital information. For example, the display  177  may display relevant advertisement information or public information in the form of video, image, or text, for example, for the person  20  passing through the passage  11  of the escalator  10  to view. Here, the power required for the display module  170  to operate is provided by the power supply module  160 , for example. Alternatively, the display module  170  may have an independent power source. The invention does not intend to impose a limitation in this regard. 
     In another embodiment, the display module  177  may also be disposed on the frame body  171  through a positioning mechanism having six degrees of freedom of motions, for example, such that the display  177  may be optionally moved or rotated along X-axis, Y-axis, or Z-axis in a space with respect to the frame body  171 . Therefore, a display plane of the display  177  may face different directions. 
     It should be noted that even though the wireless transmission module  144  is disposed in the second body  140  in this embodiment as an example, the invention is not limited thereto. For example, wireless transmission modules may be respectively disposed in the first body  110  and the display module  170  to communicate with the cloud server  150 . 
     Moreover, the display module  170  further includes a second atomizer  178  disposed in a chamber  173   a  of the top plate  173  and electrically coupled to the controller  130 . The frame body  171  further includes a second tank  175  located in the base  172  and storing a second sterilization and cleaning liquid L 2  and a pipe  176  connecting the chamber  173   a  and the second tank  175 . The pipe  176  is connected to the second atomizer  178  and is adapted to provide the second sterilization and cleaning liquid L 2  to the second atomizer  178 . Also, after the second atomizer  178  atomizes the second sterilization and cleaning liquid L 2 , the atomized second sterilization and cleaning liquid L 2  is sprayed to the external environment via a plurality of openings  173   b  connected to the chamber  173   a . In another embodiment, the second atomizer  178  may also be disposed on the frame body  171  (at the top plate  173 , a back side of the sliding track  174 , or the base  172 , for example), and an opening may be provided on the frame body  171  as corresponding to the second atomizer  178 , such that the second sterilization and cleaning liquid L 2  atomized by the second atomizer  178  may be sprayed to the external environment through the opening. 
     Here, similar to the controlling of the first atomizer  113  of the previous embodiment, the counter  123  is adapted to transmit the operation distance of the handrail  14  to the controller  130 , such that the controller  130  may control a period that the second atomizer  178  atomizes the second sterilization and cleaning liquid L 2  and sprays the atomized second sterilization and cleaning liquid L 2  via the openings  173   b  based on the operation distance. In other words, spraying of the atomized second sterilization and cleaning liquid L 2  is not continuous without interruption. Instead, after each spraying (lasting several minutes, for example), the controller  130  may transmit a stop signal to the second atomizer  178 , such that the second atomizer  178  may temporarily stop atomizing the second sterilization and cleaning liquid L 2 . Then, after the second atomizer  178  stops spraying the atomized second sterilization and cleaning liquid L 2  and the operation distance calculated by the counter  123  reaches a predetermined value, the controller  130  may send a start signal to the second atomizer  178 , such that the second atomizer  178  may perform the operation of atomizing the second sterilization and cleaning liquid L 2  and spraying the atomized second sterilization and cleaning liquid L 2  to the external environment via the openings  173   b  again. 
     Moreover, the sensor  143  is adapted to transmit the number of the person  20  passing through the passage  11  to the controller  130 , such that the controller  130  may control the period that the second atomizer  178  atomizes the second sterilization and cleaning liquid L 2  to spray the atomized second sterilization and cleaning liquid L 2  to the external environment via the openings  173   b  based on the number of the person  20  passing through the passage  11 . In other words, spraying of the atomized second sterilization and cleaning liquid L 2  is not continuous without interruption. Instead, after each spraying (lasting several minutes, for example), the controller  130  may transmit a stop signal to the second atomizer  178 , such that the second atomizer  178  may temporarily stop atomizing the second sterilization and cleaning liquid L 2 . Then, after the second atomizer  178  stops spraying the atomized second sterilization and cleaning liquid L 2  and the number of the person  20  passing through the passage  11  reaches a predetermined value, the controller  130  may send a start signal to the second atomizer  178 , such that the second atomizer  178  may perform the operation of atomizing the second sterilization and cleaning liquid L 2  to spray the atomized second sterilization and cleaning liquid L 2  to the external environment via the openings  173   b  again. It should be noted that in the display module  170 , at least one solar energy panel  179  (a plurality of the solar energy panels  179  are shown in  FIGS. 5A and 5B  for an illustrative purpose) may be disposed on the top plate  173  of the frame body  171 , so as to receive the ambient light for photovoltaic conversion. In another embodiment, the solar energy panel  179  may also be disposed at the back side of the sliding track  174 , the base  172 , or other suitable positions, and the position where the solar energy panel  172  is disposed may be adjusted based on the needs. 
     In other embodiments, the display module  170  may further include a storage module (not shown). In addition, the digital information sent by the cloud server  150  may be stored in a storage module (not shown). The digital information stored in the storage module (not shown) may be retrieved by the controller  130  and displayed on the display  177  when the advertisement information or public information is to be displayed on the display  177 . Alternatively, an audio/video file, a video file, an image file, or a text file may be stored in the storage module (not shown) in advance in the storage module. The digital information stored in the storage module (not shown) may be retrieved by the controller  130  and displayed on the display  177  when the advertisement information or public information is to be displayed on the display  177 . 
     In another embodiment, to improve the safety of people in public areas, an emergency button may be optionally disposed on the first body  110 , the second body  140 , the display module  170 , or other external components, such that when there is an emergency, people in the public areas may push the button to notify relevant authorities (e.g., the police station or fire bureau). It should be noted that the emergency button may also be a virtual touch button displayed on the display  177  of the display module  170 . 
       FIGS. 6A and 6B  are schematic views illustrating a sterilization and cleaning system of an escalator according another embodiment of the invention.  FIG. 6C  is a schematic view illustrating connections of the sterilization and cleaning system of the escalator of  FIG. 6A . Referring to  FIGS. 6A to 6C , a sterilization and cleaning system  100 B of an escalator is substantially similar to the sterilization and cleaning system  100  of the escalator of the previous embodiment, and a main difference therebetween is that the sterilization and cleaning system  100 B of the escalator further includes a display module  180  disposed side by side with the first body  110  and the second body  140 . More specifically, the display module  180  includes a base  185 , a frame body  181 , and a display  182 . In addition, the frame body  181  is inserted into and connected to the base  185 , for example, and has a top part  181   a  opposite to the base  185 . The display  182  has a pivot part  182   a . The display  182  is pivoted to the top part  181   a  by using the pivot part  182   a , so as to rotate with respect to the frame body  181 , as shown in  FIGS. 6A and 6B . 
     Here, the display  182  is a dual side display, for example, and electrically coupled to the controller  130 . The cloud server  150  is adapted to transmit digital information to the wireless transmission module  144 , and the digital information is transmitted to the controller  130  by the wireless transmission module  144 , such that the controller  130  may control an image displayed on the display  182  based on the digital information. For example, in the state shown in  FIG. 6A , the display  182  only displays relevant advertisement information or public information in the form of video, image, or text, for example, only on a display plane  183  for the person  20  passing through the passage  11  of the escalator  10  to view. Also, in the state shown in  FIG. 6B , another display plane  184  opposite to the display  183  may also display relevant advertisement information or public information in the form of video, image, or text, for example. Under such circumstance, the display plane  184  of the display  182  faces the passage  11  of the escalator  10 , for example, and the display plane  183  faces a space other than the escalator  10 . Thus, the people  20  passing around the escalator  10  are all able to view the advertisement information or public information displayed on the display plane  183  or  184 . Here, the power required for the display module  180  to operate is provided by the power supply module  160 , for example. Alternatively, the display module  180  may have an independent power source. The invention does not intend to impose a limitation in this regard. 
     In another embodiment, the display module  182  may also be disposed on the frame body  181  through a positioning mechanism having six degrees of freedom of motions, for example, such that the display  182  is able to move or rotate along X-axis, Y-axis, or Z-axis in a space with respect to the frame body  171 . Therefore, the display planes of the display  182  may face different directions. 
     It should be noted that even though the wireless transmission module  144  is disposed in the second body  140  is this embodiment as an example, the invention is not limited thereto. For example, wireless transmission modules may be respectively disposed in the first body  110  and the display module  180  to communicate with the cloud server  150 . 
     In other embodiments, the display module  180  may further include a storage module (not shown). In addition, the digital information sent by the cloud server  150  may be stored in a storage module (not shown). The digital information stored in the storage module (not shown) may be retrieved by the controller  130  and displayed on the display  182  when the advertisement information or public information is to be displayed on the display  182 . Alternatively, an audio/video file, a video file, an image file, or a text file may be stored in the storage module (not shown) in advance in the storage module. The digital information stored in the storage module (not shown) may be retrieved by the controller  130  and displayed on the display  182  when the advertisement information or public information is to be displayed on the display  182 . 
       FIG. 7  is a schematic view illustrating a sterilization and cleaning system of an escalator according another embodiment of the invention. Referring to  FIG. 7 , a sterilization and cleaning system  100 C of an escalator is substantially similar to the sterilization and cleaning system  100 B of the escalator of the previous embodiment, and a main difference therebetween is that the frame body  181  of the display module  180  the sterilization and cleaning system  100 C of the escalator is adapted to rotate with respect to the base  185  by being pivoted to the base  185  through a pivot  186 , for example, such that the display  182  disposed on the frame body  181  may display an image toward different directions. 
     In view of the foregoing, the embodiments of the invention provide the sterilization and cleaning system of the escalator including the first body, the counting wheel, the controller, the second body, and the cloud server. The cloud server is adapted to communicate with the wireless transmission module in the second body for two-way data transmission. More specifically, the first atomizer is disposed in the first body, and the controller controls the first atomizer to atomize the first sterilization and cleaning liquid in the first tank, such that the atomized first sterilization and cleaning liquid is sprayed to the handrail of the escalator, thereby automatically sterilizing and cleaning the handrail of the escalator. Furthermore, the cloud server is adapted to transmit digital information to the wireless transmission module, and the digital information is transmitted to the controller by the wireless transmission module, so that the controller may control the projection of the projector of the second body based on the digital information. For example, the projector may project relevant advertisement information or public information in the form of video, image, or text, for example, to the ground near the entrance or the exit of the passage of the escalator or to a wall, a ceiling, a projection billboard correspondingly disposed for people to view. 
     Moreover, the sensor also transmits the number of the person passing through the passage to the cloud server through the wireless transmission module for controlling and calculating the traffic of people. When the sensor senses that the person passes through the passage of the escalator, the sensor may notify the cloud server through the wireless transmission module, such that the cloud server may push a message to the mobile device (e.g., a smartphone or a tablet computer) of the person passing through the passage through the wireless transmission module for the person to view. For example, the message may be advertisement information or public information, and the control and calculation of the traffic of people may serve as an evaluation on an effect of the advertisement or propaganda. 
     It will be apparent to those skilled in the art that various modifications and variations can be made to the structure of the disclosure without departing from the scope or spirit of the disclosure. In view of the foregoing, it is intended that the disclosure cover modifications and variations of the disclosure provided they fall within the scope of the following claims and their equivalents.