WO2022065695A1

WO2022065695A1 - Elevator button sterilization device

Info

Publication number: WO2022065695A1
Application number: PCT/KR2021/010958
Authority: WO
Inventors: 길민수
Original assignee: (주)내일엔
Priority date: 2020-09-28
Filing date: 2021-08-18
Publication date: 2022-03-31
Also published as: KR102320696B1; KR102215638B1

Abstract

An elevator button sterilization device according to the present invention comprises: a housing which is formed to be mountable to the wall surface over a button panel of an elevator and is open at the bottom thereof; and an ultraviolet irradiation unit which is installed in the housing and is provided to irradiate the button panel with ultraviolet rays through the open bottom, wherein the ultraviolet irradiation unit comprises: a substrate; an ultraviolet LED chip mounted to the bottom surface of the substrate; and a reflection part which reflects ultraviolet rays, emitted from the ultraviolet LED chip, toward the button panel.

Description

elevator button sterilizer

The present invention relates to an elevator button sterilization device, and more particularly, to an elevator button sterilization device using ultraviolet light.

A button panel for selection or input of the number of floors, open/close, etc. is installed in an elevator that is used by multiple people, and is usually made of mechanical push buttons or touch buttons. Since a large number of unspecified users operate the button panel by mainly touching the button surface with their fingers, there is a constant possibility of contamination by bacteria, viruses, harmful substances, etc.

To prevent this, an antibacterial film made of copper, etc., is sometimes attached to the button, but this is not sterilization, but only advances the virus's death time a little. It has not yet been proven whether there is any practical effect. In addition, there is a problem of cumbersome maintenance, such as periodic replacement of antibacterial films due to increased damage and contamination as they are used.

An object of the present invention is to provide an elevator button sterilizer capable of effectively sterilizing an elevator button using ultraviolet light.

In addition, the technical problem to be achieved by the present invention is to provide an elevator button sterilizer capable of irradiating ultraviolet light more uniformly to a required area and having a variable ultraviolet light irradiation area to be applied to button panels of various sizes. there is

In addition, the technical problem to be achieved by the present invention is to provide an elevator button sterilization device using ultraviolet light, which can maximize the sterilization effect without harming the human body.

The problems to be solved by the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

Elevator button sterilization device according to the present invention for solving the above technical problem is formed so as to be installed on the upper wall surface of the button panel of the elevator, the lower side of the open housing; and an ultraviolet irradiation unit installed in the housing and installed to irradiate ultraviolet light to the button panel through the open lower side, wherein the ultraviolet irradiation unit includes: a substrate; an ultraviolet LED chip mounted on the lower surface of the substrate; and a reflector for reflecting the ultraviolet light emitted from the ultraviolet LED chip toward the button panel.

The reflective unit may include a first reflective surface disposed on a lower front side of the UV LED chip and facing a lower rear side, and a cross-section of the first reflective surface may be parabolic.

The ultraviolet LED chip may be disposed at the focal point of the parabola.

The ultraviolet irradiation unit may be rotatably installed with respect to the housing.

The UV irradiation unit may further include a frame in which the substrate and the reflection unit are installed, a hinge groove formed long along the side and an open lower side is provided on the inner upper surface of the housing, and the hinge groove is provided on the upper surface of the frame A hinge protrusion formed long along the side in response to is provided, the hinge protrusion is inserted into the hinge groove so that the frame can rotate about the hinge protrusion as an axis, and the elevator button sterilizer is coupled to the hinge protrusion It may further include a rotation control handle to control the rotation of the ultraviolet irradiation unit.

The elevator button sterilizer further includes a side cover covering the open side of the housing, the side cover is provided with a through hole through which the rotation control handle passes, the rotation control handle passes through the through hole It is coupled to the hinge protrusion and may be exposed outside the side cover.

The reflection unit may include: a flat portion disposed under the UV LED chip and having a hole formed at a position corresponding to the UV LED chip; the first reflective surface extending from the front of the flat portion; and a second reflective surface extending from the rear of the planar part, disposed on the lower rear of the UV LED chip, facing the lower front, and formed to have a smaller width than the first reflective surface.

The UV LED chip may include a plurality of UVA LED chips arranged along the side, and UVA LED chips emitting UVA light and UVC LED chips emitting UVC light.

The elevator button sterilizer may further include a control unit for individually controlling on/off of the UVA LED chip and the UVC LED chip according to the presence or absence of occupants in the elevator.

When the occupant is detected, the control unit turns the UVA LED chip on for a first predetermined time and then turns it off, and when the occupant is detected and the detection is resolved, the UVC LED chip turns on for a second predetermined time However, if the occupant is detected while the UV C LED chip is on, the UV C LED chip may be turned off.

The second predetermined time may be shorter than the first predetermined time.

The elevator button sterilizer may further include a occupant detection sensor for detecting the presence or absence of occupants in the elevator.

The occupant detection sensor may be an infrared sensor or an ultrasonic sensor.

The control unit may detect the presence or absence of occupants in the elevator from the system for controlling the elevator.

According to the present invention described above, it is possible to provide an elevator button sterilizer that can effectively sterilize the elevator button using ultraviolet light.

In addition, according to the present invention, it is possible to provide an elevator button sterilizer capable of irradiating ultraviolet light to a required area more uniformly and having a variable ultraviolet light irradiation area to be applied to button panels of various sizes.

In addition, according to the present invention, it is possible to provide an elevator button sterilization device using ultraviolet light, which can maximize the sterilization effect without harming the human body.

Effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the following description.

1 shows an example of an elevator button sterilization device according to an embodiment of the present invention is installed.

Figure 2 is an exploded view of the elevator button sterilization apparatus in accordance with an embodiment of the present invention viewed from the front upper side.

3 is an exploded view of the elevator button sterilization apparatus viewed from the rear upper side according to an embodiment of the present invention.

Figure 4 is a side view of the elevator button sterilization device according to an embodiment of the present invention in a state in which the side cover 120 is removed.

5 is an exploded view of the ultraviolet irradiation unit 200 viewed from the rear lower side.

6 shows the cross-sectional shape of the first reflective surface 243, the arrangement of the ultraviolet LED chip 230, and the path of the ultraviolet light.

7 shows a state in which the ultraviolet irradiation unit 200 rotates with respect to the housing 110 .

8 shows a state in which the rotation of the ultraviolet irradiation unit 200 is adjusted so that it can be applied to a button panel having a relatively long vertical length.

9 shows a state in which the rotation of the ultraviolet irradiation unit 200 is adjusted so that it can be applied to a button panel having a relatively short vertical length.

10 is a functional block diagram of an elevator button sterilization apparatus according to an embodiment of the present invention.

11 is a flowchart illustrating the operation of the control unit 300, the UVA LED chip 230A and the UVC LED chip 230C of the elevator button sterilization device according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In the following description and the accompanying drawings, substantially identical components are denoted by the same reference numerals, respectively, and thus redundant descriptions will be omitted. Also, in the description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the gist of the present invention, a detailed description thereof will be omitted.

1 shows an example of an elevator button sterilization device according to an embodiment of the present invention is installed. The elevator button sterilizer (S) is installed on the upper wall surface of the button panel (B) of the elevator, and is configured to irradiate the ultraviolet light toward the button panel (B). Since it is known that ultraviolet light has a sterilizing effect, the button panel B is sterilized by the elevator button sterilization device S irradiating the button panel B with ultraviolet rays for a certain period of time.

2 and 3 are an elevator button sterilizing device according to an embodiment of the present invention, FIG. 2 is an exploded view of the elevator button sterilizing device viewed from the front upper side, and FIG. 3 is an exploded view of the elevator button sterilizing device viewed from the rear upper side am. The elevator button sterilization apparatus according to this embodiment may include a housing 110 ,

side covers

120 and 130 , an ultraviolet irradiation unit 200 , and the like. 4 is a side view of the elevator button sterilizer with the side cover 120 removed, and FIG. 5 is an exploded view of the ultraviolet irradiation unit 200 viewed from the rear lower side.

The housing 110 is formed so as to be installed on the upper wall surface of the button panel (B) of the elevator, both sides and the lower side may be in an open shape. The housing 110 may be formed long along the side to correspond to the width of the button panel (B). A double-sided tape 116 (or a magnet) or a wall hanging part 117 may be provided on the rear side of the housing 110 to be installed on the wall.

The side covers 120 and 130 cover the open both sides of the housing 110, respectively.

Piece grooves

111 and 112 are provided on the side surface of the housing 110, and through-

holes

121 and 122 corresponding to the

piece grooves

111 and 112 are formed in the side cover 120, the fastening piece 131, The side covers 120 and 130 may be coupled to the housing 110 as the 132 passes through the through

holes

121 and 122 and is fastened to the

piece grooves

111 and 112 .

The ultraviolet irradiation unit 200 is installed in the housing 110 , and is installed to irradiate ultraviolet light to the button panel B through the open lower side of the housing 110 . The ultraviolet irradiation unit 200 may include a frame 210 , a substrate 220 , an ultraviolet LED chip 230 , and a reflector 240 .

The substrate 220 , the LED chip 230 , and the reflector 240 are installed on the frame 210 . The frame 210 is formed to surround the substrate 220 , the LED chip 230 , and the reflector 240 from above. The substrate 220 is installed on the upper and lower surface of the frame 210 . Both ends of the reflector 240 are fixed to each other by being caught in the

locking grooves

215 and 217 of the frame 210 .

The substrate 220 is formed long along the side, and the UV LED chips 230 are mounted on the lower surface of the substrate 220 so that a plurality of them are arranged along the side. The UV LED chip 230 may include an UVA LED chip 230A emitting UVA light and an UVC LED chip 230C emitting UVC light. One or more UVA LED chips 230A and one or more UVC LED chips 230C may be alternately arranged. Ultraviolet A light has a wavelength of 320 to 400 nm, and while it is harmless to the human body, it has a weak sterilization power, so it should be irradiated for a relatively long time. Ultraviolet C light is ultraviolet light having a wavelength of 100 to 280 nm, and 99% of sterilization is possible in about 1 minute, but it is harmful to the human body, so it is preferable not to expose it to the human body. In an embodiment of the present invention, the UVA light and UVC light are used together to maximize the sterilization effect so as not to harm the human body, which will be described later.

The reflector 240 reflects the ultraviolet light emitted from the ultraviolet LED chip 230 toward the button panel B (ie, toward the lower rear side). The reflective part 240 may include a planar part 241 , a first reflective surface 243 , and a second reflective surface 245 .

The flat part 241 is disposed under the UV LED chip 230 , and a hole 242 is provided at a position corresponding to the UV LED chip 230 to allow the UV light emitted from the UV LED chip 230 to pass therethrough. is formed

The first reflective surface 243 is formed to extend from the front of the flat portion 241 to the front lower side. The first reflective surface 243 is disposed on the front lower side of the ultraviolet LED chip 230 and faces the lower rear side, thereby reflecting the ultraviolet light emitted from the ultraviolet LED chip 230 toward the button panel B.

The second reflective surface 245 is formed to extend downwardly from the rear of the flat portion 241 . The second reflective surface 245 is disposed on the lower rear side of the ultraviolet LED chip 230 and faces the lower front side, so that the ultraviolet light emitted from the ultraviolet LED chip 230 is reflected toward the button panel (B). The contribution of the second reflective surface 245 to the UV light irradiation to the button panel B is less than that of the first reflective surface 243 , and the second reflective surface 245 is smaller than the first reflective surface 243 . It may be formed in a width, and the second reflective surface 245 may not be provided according to an embodiment.

Usually, the emission angle of the ultraviolet LED chip is about 120 degrees. Therefore, simply by arranging the LED chip toward the area to be irradiated, light is irradiated even to an unnecessary portion, thereby reducing the sterilization efficiency. Accordingly, in the embodiment of the present invention, the sterilization efficiency can be increased by guiding the ultraviolet light to a region requiring the ultraviolet light using the first reflective surface 243 (and, optionally, the second reflective surface 245 ).

In addition, it will be possible to maximize the sterilization performance by irradiating the ultraviolet light to the area to be irradiated (ie, the area of the button panel B) as uniformly as possible. In the embodiment of the present invention, to this end, the cross section of the first reflective surface 243 (and, optionally, the second reflective surface 245) is formed in a parabola, and the ultraviolet LED chip 230 is disposed at the focal point of the parabola. do. Light from the focal point of the parabola travels parallel to the axis of the parabola no matter where it is reflected. 6 shows the cross-sectional shape of the first reflective surface 243, the arrangement of the ultraviolet LED chip 230, and the path of the ultraviolet light. As shown, if the axis of the parabola forming the first reflective surface 243 is directed toward the rear lower side (ie, toward the button panel B), and the ultraviolet LED chip 230 is placed at the focal point of the parabola, All of the ultraviolet light reflected from the first reflective surface 243 is irradiated to the button panel B in the same direction. Therefore, the UV light emitted from the UV LED chip 230 can be uniformly irradiated over all areas of the button panel (B), and the UV light irradiated to areas other than the button panel (B) can be minimized, thereby sterilizing efficiency. and maximizing performance.

On the other hand, the size (especially the vertical length) of the button panel (B) for each elevator is various. However, assuming a specific light path as shown in FIG. 6 , UV light may be irradiated to the button panel B of a certain vertical length as much as the corresponding area, but if the vertical length is smaller than that, UV light is transmitted to the button panel B ) may be irradiated to an area outside the range, and if the vertical length is greater than that, ultraviolet light may not be properly irradiated to some areas of the button panel (B). Accordingly, in the embodiment of the present invention, the ultraviolet irradiation unit 200 is rotatably installed with respect to the housing 110 so that the ultraviolet light can be irradiated over the corresponding area to the button panel B of various sizes.

To this end, a hinge groove 113 that is formed long along the side and has an open lower side is provided on the inner upper surface of the housing 110 , and the upper surface of the frame 210 corresponds to the hinge groove 113 and is formed long along the side. A hinge protrusion 213 is provided. The hinge protrusion 213 of the frame 210 is inserted into the hinge groove 113 of the housing 110 so that the frame 210 can rotate about the hinge protrusion 213 as an axis, so that the UV irradiation unit 200 is installed in the housing. It becomes rotatable with respect to (110).

A rotation control handle 133 coupled to the hinge protrusion 213 to adjust the rotation of the ultraviolet irradiation unit 200 may be provided so that the user can adjust the rotation of the ultraviolet irradiation unit 200 . At this time, the side cover 120 is provided with a through hole 123 through which the rotation control handle 133 passes, and the rotation control handle 133 passes through the through hole 123 of the side cover 120 to pass through the hinge protrusion 213 . ) while being coupled to the side cover 120 may be exposed outside. The user can adjust the rotation of the ultraviolet irradiation unit 200 by turning the rotation control handle (133).

7 shows a state in which the ultraviolet irradiation unit 200 rotates with respect to the housing 110 . As shown, the ultraviolet irradiation unit 200 is rotatable about the hinge protrusion 213 as an axis, and through this, the direction in which the first reflective surface 243 faces may be changed.

8 shows a state in which the rotation of the ultraviolet irradiation unit 200 is adjusted so that it can be applied to a button panel having a relatively long vertical length. In the rotation state as shown, ultraviolet light may be irradiated over the corresponding area of the button panel B1 having a relatively long vertical length.

9 shows a state in which the rotation of the ultraviolet irradiation unit 200 is adjusted so that it can be applied to a button panel having a relatively short vertical length. In comparison with FIG. 8, by slightly rotating the ultraviolet irradiation unit 200 clockwise in the state of FIG. 8, the optical path of the ultraviolet light is changed, so that the vertical length is relatively short in the corresponding area of the button panel B2. Ultraviolet light may be irradiated over.

The elevator button sterilizer may further include an occupant detection sensor 115 , a control unit 300 and a battery 310 in addition to the UVA LED chip 230A and the UVC LED chip 230C described above. The controller 300 may be implemented as a microprocessor and mounted on the substrate 220 .

The occupant detection sensor 115 detects the presence of occupants in the elevator. The occupant detection sensor 115 may be installed in a hole 114 provided in front of the housing 110 . The occupant detection sensor 115 may be an infrared sensor or an ultrasonic sensor. The infrared sensor can detect whether there is a person in front or in the vicinity by emitting infrared rays and detecting the reflected light. The ultrasonic sensor may detect whether there is a person in front or around by emitting an ultrasonic wave and detecting the reflected wave.

The battery 310 supplies power to the controller 300 , the UVA LED chip 230A, the UVC LED chip 230C, and the occupant detection sensor 115 . Depending on the embodiment, the battery 310 may not be provided separately and may use power provided by the elevator.

The control unit 300 individually controls on/off of the UVA LED chip 230A and the UVC LED chip 230C according to the presence or absence of an occupant in the elevator detected by the occupant detection sensor 115 . According to the embodiment, when the system for controlling the elevator detects the presence of occupants by itself, for example, using a sensor, CCTV, weight, etc., the control unit 300 can detect the presence of occupants from the system controlling the elevator. . In this case, the occupant detection sensor 115 may not be provided.

As described above, UVA light is harmless to the human body, but has a weak sterilization power, so it needs to be irradiated for a relatively long time. An embodiment of the present invention provides a method for maximizing the sterilization effect without harming the human body in consideration of the characteristics of the ultraviolet A light and the ultraviolet C light.

The controller 300 turns on the UVA LED chip 230A for a first predetermined time (eg, about 3 minutes) and then turns it off whenever a occupant is detected. Then, the UVA light is irradiated whenever a occupant is detected or continuously irradiated when a occupant is continuously generated, so that a sufficient sterilization effect can be obtained, and since it is harmless to the human body, it may be irradiated while the occupant is present. In addition, when the UVA LED chip 230A is turned on, the occupant can visually recognize that sterilization is being performed.

On the other hand, when the occupant is detected and the detection is canceled, the control unit 300 turns on the UV C LED chip 230C for a second predetermined time (eg, about 1 minute) shorter than the first predetermined time and then turns it off . If an occupant is detected, the occupant must have touched the button, so sterilization is necessary. Since UV C light is harmful to the human body, it is irradiated with UV C light when no occupant is present. . In addition, since the UV C light should be irradiated when there is no occupant, when the occupant is detected while the UV C light is being irradiated, that is, while the UV C LED chip 230C is on, the controller 300 controls the UV C LED chip ( 230C) to prevent the occupant from being exposed to UVC light.

When an occupant is detected (step 1110), the control unit 300 turns on the UVA LED chip 230A (step 1115), and when a first predetermined time elapses (step 1120), the controller 300 controls the UVA LED chip (230A) is turned off (step 1125).

When the occupant detection is resolved after step 1110 (step 1130) (that is, when there is no occupant in the elevator), the control unit 300 turns on the UV C LED chip 230C (step 1135). In this case, if the first predetermined time has not yet elapsed since step 1115, both the UVA LED chip 230A and the UVC LED chip 230C are in an on state. When a second predetermined time elapses after step 1135 (step 1140), the controller 300 turns off the UVC LED chip 230C (step 1145).

When the occupant is detected (step 1150) before the second predetermined time elapses after the UV C LED chip 230C is turned on through step 1135 (that is, while the UV C LED chip 230C is on), the control unit 300 ) turns off the UV C LED chip 230C (step 1155). And when the occupant detection is resolved (step 1160), the controller 300 turns on the UVC LED chip 230C again (step 1135).

Embodiments of the present invention may be represented by functional block configurations and various processing steps. These functional blocks may be implemented in any number of hardware and/or software configurations that perform specific functions. For example, an embodiment may be an integrated circuit configuration, such as memory, processing, logic, look-up table, etc., capable of executing various functions by means of the control of one or more microprocessors or other control devices. can be hired Similar to how components of the present invention may be implemented as software programming or software components, embodiments may include various algorithms implemented as data structures, processes, routines, or combinations of other programming constructs, including C, C++ , may be implemented in a programming or scripting language such as Java, assembler, or the like. Functional aspects may be implemented in an algorithm running on one or more processors. Also, embodiments may employ prior art for electronic configuration, signal processing, and/or data processing, and the like. Terms such as “mechanism”, “element”, “means” and “configuration” may be used broadly and are not limited to mechanical and physical configurations. The term may include the meaning of a series of routines of software in connection with a processor or the like.

The specific implementations described in the embodiment are only embodiments, and do not limit the scope of the embodiment in any way. For brevity of the specification, descriptions of conventional electronic components, control systems, software, and other functional aspects of the systems may be omitted. In addition, the connection or connection members of the lines between the components shown in the drawings illustratively represent functional connections and/or physical or circuit connections, and in an actual device, various functional connections, physical connections that are replaceable or additional may be referred to as connections, or circuit connections. In addition, unless there is a specific reference such as "essential", "importantly", etc., it may not be a necessary component for the application of the present invention.

So far, the present invention has been looked at with respect to preferred embodiments thereof. Those of ordinary skill in the art to which the present invention pertains will understand that the present invention can be implemented in a modified form without departing from the essential characteristics of the present invention. Therefore, the disclosed embodiments are to be considered in an illustrative rather than a restrictive sense. The scope of the present invention is indicated in the claims rather than the foregoing description, and all differences within the scope equivalent thereto should be construed as being included in the present invention.

Claims

An elevator button sterilizer comprising:

The housing is formed to be installed on the upper wall of the button panel of the elevator, the lower side is open; and

and an ultraviolet irradiation unit installed in the housing and installed to irradiate ultraviolet light to the button panel through the open lower side,

The ultraviolet irradiation unit,

Board;

an ultraviolet LED chip mounted on the lower surface of the substrate; and

Elevator button sterilization device, characterized in that it comprises a reflector for reflecting the ultraviolet light emitted from the ultraviolet LED chip toward the button panel.
According to claim 1,

The reflective unit is disposed on the lower front of the UV LED chip and includes a first reflective surface facing the lower rear, and the cross-section of the first reflective surface is a parabola.
3. The method of claim 2,

The UV LED chip is an elevator button sterilizer, characterized in that it is disposed at the focal point of the parabola.
3. The method of claim 2,

The ultraviolet irradiation unit is an elevator button sterilizer, characterized in that it is rotatably installed with respect to the housing.
5. The method of claim 4,

The ultraviolet irradiation unit,

Further comprising a frame in which the substrate and the reflector are installed,

A hinge groove formed long along the side and having an open lower side is provided on the inner upper surface of the housing,

A hinge protrusion is provided on the upper surface of the frame to correspond to the hinge groove and formed long along the side,

The hinge protrusion is inserted into the hinge groove so that the frame is rotatable about the hinge protrusion as an axis,

Elevator button sterilization device, characterized in that it further comprises a rotation control handle coupled to the hinge projection to control the rotation of the ultraviolet irradiation unit.
6. The method of claim 5,

Further comprising a side cover covering the open side of the housing,

The side cover is provided with a through hole through which the rotation control handle passes,

The rotation control handle passes through the through hole and is coupled to the hinge protrusion and is exposed outside the side cover.
3. The method of claim 2,

the reflector,

a flat portion disposed under the UV LED chip and having a hole formed at a position corresponding to the UV LED chip;

the first reflective surface extending from the front of the flat portion; and

Elevator button sterilization device, characterized in that it is formed extending from the rear of the flat portion, disposed on the lower rear side of the UV LED chip and facing the lower front, and comprising a second reflective surface formed with a smaller width than the first reflective surface.
According to claim 1,

The ultraviolet LED chip is an elevator button sterilizer, characterized in that it comprises a plurality of arranged along the side, an ultraviolet A LED chip for emitting ultraviolet A light and an ultraviolet C LED chip for emitting ultraviolet C light.
9. The method of claim 8,

Elevator button sterilization device, characterized in that it further comprises a control unit for individually controlling the on-off of the UVA LED chip and the UVC LED chip according to the presence or absence of occupants in the elevator.
10. The method of claim 9,

When the occupant is detected, the control unit turns the UVA LED chip on for a first predetermined time and then turns it off. When the occupant is detected and the detection is resolved, the control unit turns on the UVC LED chip for a second predetermined time. Elevator button sterilization device, characterized in that the UV C LED chip is turned off when a occupant is detected while the UV C LED chip is on.
11. The method of claim 10,

Elevator button sterilizer, characterized in that the second predetermined time is shorter than the first predetermined time.
10. The method of claim 9,

Elevator button sterilization device, characterized in that it further comprises a occupant detection sensor for detecting the presence of occupants in the elevator.
13. The method of claim 12,

The elevator button sterilization device, characterized in that the occupant detection sensor is an infrared sensor or an ultrasonic sensor.
10. The method of claim 9,

The control unit is an elevator button sterilizer, characterized in that for detecting the presence or absence of occupants in the elevator from the system for controlling the elevator.