KR20220099649A - Serving robot for serving food providing sterilization function - Google Patents

Abstract

Disclosed is a serving robot for serving food. The disclosed serving robot may include: a plurality of trays on which food or trays with food are put; a tray accommodation unit providing an accommodation space in which the plurality of trays are accommodated; an ultraviolet ray sterilization member provided to sterilize the plurality of trays and the accommodation space using ultraviolet rays; a driving unit provided under the tray accommodation unit to allow the tray accommodation unit to move; and a display unit provided on the outside of the tray accommodation unit and displaying information related to food serving at least. The tray accommodation unit may include a supporting pillar unit. The plurality of trays may be installed on one side surface of the supporting pillar unit to be spaced from each other up and down. A first end part of the tray may be installed to be fixed to the supporting pillar unit. The ultraviolet ray sterilization member may include at least one between a first ultraviolet ray emitting module provided to be adjacent to the first end part of the tray and a second ultraviolet ray emitting module provided on the lower surface of the tray. The present invention can acquire an effect of facilitating preventive measures, sterilization, and related maintenance.

Description

Serving robot for serving food providing sterilization function

The present invention relates to a robot device, and more particularly, to a serving robot for serving food.

A robot is a machine or computer program that has a human-like appearance or function, and is a mechanical device that can automatically perform a complex series of tasks. Robots can be classified into various fields, such as industrial, medical, space, and submarine, depending on their application fields.

Recently, due to the development of autonomous driving technology, automatic control technology using sensors, communication technology, and the like, the functions of robots are expanding. For example, research is being conducted on how to use robots in stores such as restaurants and cafes. Such robots may include a cooking robot that directly cooks food or assists a chef in a cooking process, and a serving robot that replaces or assists the waiter. Serving robots can provide services such as handling customer order requests or delivering food or beverages to customers while driving within the store.

As robot-related technology develops and the demand for non-face-to-face services increases due to infectious diseases, etc., interest in serving robots that can serve food non-face-to-face is also increasing. However, the prevention and maintenance system for the serving robot is still incomplete.

An object of the present invention is to provide a serving robot that can effectively (smoothly/stable) perform a food serving function, and also can easily prevent/sterilize and maintain related thereto.

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.

According to embodiments of the present invention for achieving the above object, there is provided a serving robot for serving food, comprising: a plurality of trays on which food or trays containing food are placed; a tray accommodating part providing an accommodating space in which the plurality of trays are accommodated; an ultraviolet sterilization member provided to sterilize the plurality of trays and the accommodating space using ultraviolet rays; a traveling unit provided under the tray accommodating part and enabling movement of the tray accommodating part; and a display unit provided outside the tray accommodating part and configured to display at least information related to serving of food.

The tray receiving unit may include a supporting pillar, and the plurality of trays may be vertically spaced apart from each other on one side of the supporting pillar, and the first end of the tray is fixed to the supporting pillar to be installed. The ultraviolet sterilization member may include at least one of a first ultraviolet light emitting module provided adjacent to the first end of the tray and a second ultraviolet light emitting module provided on a lower surface of the tray.

The first UV light emitting module and the second UV light emitting module may be disposed perpendicular to each other.

A plurality of the second UV light emitting modules may be disposed to be spaced apart from each other on the lower surface of the tray.

The first UV light emitting module and the second UV light emitting module may have different central emission wavelengths.

The tray receiving portion includes a first sidewall portion having a support pillar portion, a second sidewall portion disposed opposite to the first sidewall portion and having a see-through window, and an upper side connecting the upper end of the first sidewall portion and the upper end of the second sidewall portion It may include a cover part. The plurality of trays may be disposed between the first sidewall part and the second sidewall part.

The serving robot may further include a drawer-type receiving member provided between the tray receiving unit and the traveling unit.

According to the embodiments of the present invention, it is possible to implement a serving robot that can effectively (smoothly/stable) perform a food serving function, and also facilitate prevention/sterilization and related maintenance. By using the serving robot according to the embodiment, it is possible to increase the stability and efficiency of food serving. In addition, if the serving robot for the embodiment is used, it is possible to obtain the effect of facilitating the prevention/sterilization and related maintenance.

1A and 1B are diagrams illustrating a serving robot according to an embodiment of the present invention.
2 is a view for explaining an ultraviolet sterilization member that can be applied to a serving robot according to an embodiment of the present invention and a photographed image corresponding thereto.
3 is a plan view for explaining the configuration and arrangement of an ultraviolet sterilization member that can be applied to a serving robot according to an embodiment of the present invention.
4 is a plan view for explaining the configuration and arrangement of a UV sterilizing member that can be applied to a serving robot according to another embodiment of the present invention.
5 is a plan view for explaining the configuration and arrangement of a UV sterilizing member that can be applied to a serving robot according to another embodiment of the present invention.
6A and 6B are diagrams illustrating a serving robot according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Examples of the present invention to be described below are provided to more clearly explain the present invention to those of ordinary skill in the art, and the scope of the present invention is not limited by the following examples, The embodiment may be modified in many different forms.

The terminology used herein is used to describe specific embodiments, not to limit the present invention. As used herein, terms in the singular form may include the plural form unless the context clearly dictates otherwise. Also, as used herein, the terms "comprise" and/or "comprising" refer and does not exclude the presence or addition of one or more other shapes, steps, numbers, actions, members, elements, and/or groups thereof. In addition, as used herein, the term “connection” not only means that certain members are directly connected, but also includes indirectly connected members with other members interposed therebetween.

In addition, when a member is said to be located "on" another member in the present specification, this includes not only a case in which a member is in contact with another member but also a case in which another member is present between the two members. As used herein, the term “and/or” includes any one and any combination of one or more of the listed items. In addition, as used herein, terms such as "about", "substantially", etc. are used in the meaning of the range or close to the numerical value or degree, in consideration of inherent manufacturing and material tolerances, and to help the understanding of the present application The exact or absolute figures provided for this purpose are used to prevent the infringer from using the mentioned disclosure unfairly.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The size or thickness of the regions or parts shown in the accompanying drawings may be slightly exaggerated for clarity and convenience of description. Like reference numerals refer to like elements throughout the detailed description.

1A and 1B are diagrams illustrating a serving robot 100 according to an embodiment of the present invention. 1A and 1B are diagrams illustrating the shape of the serving robot 100 in different directions.

1A and 1B , the serving robot 100 according to an embodiment of the present invention includes a plurality of trays 10 on which food or a tray containing food is placed, and an accommodation space in which the plurality of trays 10 are accommodated. It may include a tray receiving unit 20 to provide. Here, the food may include anything that a person eats or drinks. The plurality of trays 10 may be disposed to be spaced apart from each other in the vertical direction. Here, a case in which three trays 10 are used is shown, but the number of trays 10 may vary. The plurality of trays 10 may be installed to be fixed in the tray receiving unit 20 . The tray accommodating part 20 may be referred to as a 'tray accommodating unit' or a 'tray accommodating body part'.

The serving robot 100 may include a traveling unit 30 provided under the tray receiving unit 20 to enable movement of the tray receiving unit 20 . The traveling unit 30 may be moved by driving a wheel member (not shown) at a lower portion in contact with the floor (ground). In relation to movement/driving of the driving unit 30 , an autonomous driving technology or an automatic control technology using a sensor may be applied. Since these techniques are well known, a detailed description thereof will be omitted.

In addition, the serving robot 100 may include a display unit 40 provided on the outside of the tray receiving unit (20). For example, the display unit 40 may be disposed on one side of the upper portion of the tray receiving unit 20 . The display unit 40 may be a device for displaying at least information related to food serving. For example, the display unit 40 may display a table number (or order number) and food order information of a predetermined customer. In addition, the display unit 40 may provide an interface through which a customer or a clerk (store employee) can input information related to an order or service. However, the function and role of the display unit 40 is not limited to the above-mentioned bar, and may be variously changed.

The tray receiving part 20, as shown in FIG. 1b, may include a support pillar part 21, and a plurality of trays 10 are vertically disposed on one side (inner surface) of the support pillar part 21 . They can be installed spaced apart from each other. A plurality of grooves G10 may be provided at regular intervals in the support pillar 21 , and a plurality of trays 10 may be installed to correspond to some of the grooves G10 among the plurality of grooves G10 . have. A portion of the first end of the tray 10 may be inserted into the corresponding groove (G10). In this way, the first end of the tray 10 may be fixed to the support pillar 21 and installed.

The support pillar 21 may be disposed vertically (or substantially vertically) from one end of the upper surface of the traveling unit 30 . A first extension part 22 extending to one side of the support pillar part 21 and a second extension part 23 extending to the other side of the support pillar part 21 may be further provided. The first and second extensions 22 and 23 may be extended enough to accommodate the tray 10 therein, and the outer circumferential surface of one side of the tray receiving unit 20 together with the support pillar 21 is formed. can be achieved It can be said that the support pillar 21 and the first and second extension portions 22 and 23 extending to both sides thereof respectively constitute the first sidewall portion 25 of the tray receiving portion 20 .

The tray receiving part 20 is a second side wall part 27 disposed to face the first side wall part 25 and an upper side connecting the upper end of the first side wall part 25 and the upper end of the second side wall part 27 . A cover part 29 may be further included. At least a portion of the upper cover part 29 may form an integral structure with the first sidewall part 25 and/or the second sidewall part 27 . The plurality of trays 10 may be disposed between the first sidewall part 25 and the second sidewall part 27 . The second sidewall part 27 may serve to cover the other end (ie, the second end) side of the plurality of trays 10 , and the upper cover part 29 is the upper surface side of the plurality of trays 10 . may play a role in covering A see-through window W1 may be provided on the second side wall portion 27 . The see-through window W1 may have a structure that is somewhat expanded toward the upper cover part 29 . A customer or a clerk can easily check the inside of the tray receiving unit 20 through the see-through window (W1).

According to the embodiment of the present invention, the tray receiving unit 20 may include a first side wall portion 25, a second side wall portion 27, and an upper cover portion 29, in this case, the serving robot 100 ), food can be transported more stably while effectively protecting the food from contamination of the external environment. In the absence of the second side wall part 27 or the upper cover part 29 , since the exposed surface of the food is widened, the possibility of contamination or falling of the food may increase. In addition, in the embodiment of the present invention, the space (hereinafter, the first space) between the first side wall portion 25 and the second side wall portion 27 in the first lateral direction of the tray 10 may be generally open, A space (hereinafter, referred to as a second space) between the first side wall part 25 and the second side wall part 27 in the second lateral direction of the tray 10 may be generally open, and food enters and exits through these open spaces. This can be done easily (efficiently). It is possible to effectively protect food by using the two side wall parts 25 and 27 and the upper cover part 29 while securing/maintaining an open space to a certain extent in consideration of the efficiency of food entry and exit. However, depending on the case, an openable and openable window or door may be installed in the first space or the second space. In this case, the food protection function can be further strengthened.

In addition, the serving robot 100 according to the embodiment of the present invention includes a 'ultraviolet sterilization member' configured to sterilize the plurality of trays 10 and the space in which they are accommodated (ie, the accommodating space) using ultraviolet (UV) rays. may include The ultraviolet sterilization member will be described in more detail below with reference to FIGS. 2 to 5 .

2 is a view for explaining the ultraviolet sterilization member 50 that can be applied to the serving robot according to an embodiment of the present invention and a photographed image corresponding thereto. FIG. 2 shows a part of the serving robot 100 described with reference to FIGS. 1A and 1B separated.

Referring to FIG. 2 , the serving robot according to an embodiment of the present invention may include an ultraviolet sterilization member 50 . The ultraviolet sterilization member 50 is a lower surface of the first ultraviolet light emitting module 51 and the tray 10 provided adjacent to the first end of the tray 10 (that is, the end fixed to the support pillar 21). It may include at least one of the second ultraviolet light emitting module 52 provided in the . The first UV light emitting module 51 may be disposed adjacent to the end of the upper surface of the tray 10 (ie, the first end) or the end. The first ultraviolet light emitting module 51 may serve to intensively sterilize viruses or bacteria that may occur at the first end of the tray 10 , and also sterilize the entire area of the upper surface of the tray 10 . can also be done. In the case of the second ultraviolet light emitting module 52 , it is possible to perform sterilization on the lower surface of the tray 10 on which it is installed and the upper surface of the other tray 10 disposed below it. A first ultraviolet light emitting module 51 and a second ultraviolet light emitting module 52 may be provided on each of the trays 10 . When the first ultraviolet light emitting module 51 and the second ultraviolet light emitting module 52 are used together, the prevention and sterilization effect can be improved. Both the first ultraviolet light emitting module 51 and the second ultraviolet light emitting module 52 may be a kind of UV LED (ultraviolet light emitting diode).

In a state in which the plurality of trays 10 are fixed in the tray receiving unit 20 and installed, the plurality of trays 10 and the space in which they are accommodated are easily disinfected and sterilized by using the UV sterilization member 50 . can do. The quarantine/sterilization operation using the ultraviolet sterilization member 50 may be performed manually or automatically. In the case of the automatic method, by setting the operating time of the ultraviolet sterilization member 50, etc., the quarantine/sterilization operation may be automatically performed according to the time period when the store (restaurant) is not operated (eg, night time period). In this case, since the prevention/sterilization operation can be easily carried out regularly and automatically, it is possible to obtain the effect of convenient maintenance and management (maintenance) of the cleanliness of the serving robot. In addition, according to the distance between the surrounding people and the serving robot 40, it is possible to perform a continuous sterilization function even during business hours. This will be described in more detail below with reference to the accompanying drawings.

Reference numeral 15, which is not described in FIG. 2, denotes a support for supporting the lower portion of the tray 10. As shown in FIG. The support 15 may be provided to support the central portion of the lower surface of the tray 10 , and may be disposed perpendicular to the support pillar 21 . The support 15 may be fastened (coupled) to the lower surface of the tray 10 , and one end of the support 15 may be in contact with or fixed to the support pillar 21 to be supported by the support pillar 21 . . By using the support 15, the tray 10 can be installed more firmly.

3 is a plan view for explaining the configuration and arrangement of a UV sterilizing member that can be applied to a serving robot according to an embodiment of the present invention.

Referring to FIG. 3 , according to an embodiment of the present invention, the UV sterilization member of the serving robot is a first UV light emitting module 51 and tray 10 disposed adjacent to the first end on the upper surface side of the tray 10 . may include a second ultraviolet light emitting module 52a disposed on a lower surface of the . The first UV light emitting module 51 may have a rod shape extending in the width direction (ie, the Y-axis direction) of the tray 10 . The second UV light emitting module 52a may have a rod shape extending in the longitudinal direction (ie, the X-axis direction) of the tray 10 . The second UV light emitting module 52a may be disposed to substantially cross the central portion of the tray 10 in the width direction. In this case, the second UV light emitting module 52a may be disposed to correspond to the central portion of the support 15 . The first UV light emitting module 51 and the second UV light emitting module 52a may be disposed perpendicularly (or substantially perpendicularly) to each other.

4 is a plan view for explaining the configuration and arrangement of a UV sterilizing member that can be applied to a serving robot according to another embodiment of the present invention.

Referring to FIG. 4 , according to an embodiment of the present invention, the UV sterilization member of the serving robot is a first UV light emitting module 51 and tray 10 disposed adjacent to the first end on the upper surface side of the tray 10 . It may include a plurality of second ultraviolet light emitting modules (52b, 52c) disposed on the lower surface. A plurality of second ultraviolet light emitting modules (52b, 52c) may be arranged side by side spaced apart from each other on the lower surface of the tray (10). For example, a plurality of (two) second UV light emitting modules 52b and 52c may be disposed on one side and the other side of the support 15 , respectively. The plurality of second UV light emitting modules 52b and 52c may be disposed perpendicularly (or substantially perpendicular to) with respect to the first UV light emitting module 51 .

According to another embodiment of the present invention, the second ultraviolet light emitting module 52a of FIG. 3 may be further added to the structure of FIG. 4 . An example is shown in FIG. 5 . In FIG. 5 , the plurality of second UV light emitting modules 52a , 52b and 52c may include the second UV light emitting module 52a described with reference to FIG. 3 and the second UV light emitting modules 52b and 52c described with reference to FIG. 4 . .

The configuration and arrangement of the ultraviolet sterilization member described with reference to FIGS. 3 to 5 are exemplary, and may be variously changed. For example, a plurality of first UV light emitting modules may be provided, and the number and arrangement of the second UV light emitting modules may be variously changed. In addition, the first UV light emitting module and the second UV light emitting module may have the same central emission wavelength, but may have different central emission wavelengths in some cases. When the first ultraviolet light emitting module and the second ultraviolet light emitting module have different central emission wavelengths, a wider wavelength range or a plurality of wavelength bands may be used, which may be advantageous in improving the prevention and sterilization effect.

According to an embodiment, the central emission wavelength of the second UV light emitting modules 52c and 52b having a high human exposure possibility is determined to be a longer wavelength than the central emission wavelength of the second UV light emitting module 52a having a relatively low human exposure possibility. can This is to reduce the harm to the human body because the harm to the human body is high in the case of a wavelength having a short central emission wavelength.

In addition, the on/off of the first ultraviolet light emitting module 51 and the second ultraviolet light emitting module 52a , 52b , and 52c and the respective central emission wavelengths may be dynamically controlled. According to one embodiment, when food is present in the tray 10 or when it is detected that a person exists within a threshold distance from the serving robot 100 (by an provided camera, vision sensor, etc.), the first UV light emitting module ( 51) and the second UV light emitting modules 52a, 52b, and 52c may be controlled to maintain an off state. In addition, when it is sensed that a person is present within a distance greater than the threshold distance, the first UV light emitting module 51 and the second UV light emitting modules 52a, 52b, and 52c emit central light corresponding to the wavelength of the UV-B region. It may be preset to emit ultraviolet light having a wavelength. This may be to reduce the possibility of generating harmful effects on food or the human body through ultraviolet rays. In addition, the first UV light emitting module 51 and the second UV light emitting module 52a, 52b, 52c may be preset to emit UV-C corresponding to UV-C when business is closed or break time, Preferably, ultraviolet light corresponding to a wavelength of 253.7 nm may be emitted.

The first ultraviolet light emitting module 51 and the second ultraviolet light emitting module 52a, 52b, 52c emit ultraviolet light according to the distance from the person when it is determined that the surrounding person is at a greater distance than the threshold distance during business hours. The central emission wavelength can be adjusted. More specifically, as the distance from the surrounding people increases, the length of the central emission wavelength of the first UV light emitting module 51 and the second UV light emitting module 52a, 52b, 52c decreases, and the intensity of the emitted UV light increases. Conversely, as the distance from the person increases, the length of the central emission wavelength increases and the intensity of the emitted ultraviolet rays decreases.

More specifically, according to the distance between the surrounding person and the serving robot 40, the central emission wavelength and the intensity of the UV light of the first UV light emitting module 51 and the second UV light emitting module 52a, 52b, 52c are different from the surrounding people and serving It may be determined by a function calculated based on the first variable corresponding to the distance of the robot 40 and the second variable corresponding to the relative speed of the surrounding people and the serving robot 40 . For example, even with the same first variable, when the distance between the surrounding person and the serving robot 40 increases faster, the center of the first ultraviolet light emitting module 51 and the second ultraviolet light emitting module 52a, 52b, 52c The emission wavelength may be set to a shorter wavelength, and the intensity of the emitted ultraviolet light may be set to a larger value. The central emission wavelength and the intensity of the emitted ultraviolet light can be dynamically changed based on the distance and relative speed of the serving robot 40 with the surrounding people. Through this, the serving robot 40 can provide the effect of increasing the sterilization effect and reducing the harmfulness to the human body at the same time.

The first ultraviolet light emitting module 51 and the second ultraviolet light emitting module 52a, 52b, 52c may have a central emission wavelength adjusted according to the position of the serving robot 40 according to an embodiment. More specifically, when the serving robot 40 is located in a pit with a high degree of pollution, in the vicinity of a toilet, etc., the central emission wavelength of the emitted ultraviolet rays may be preset to have a relatively short wavelength compared to other positions, and the emitted ultraviolet rays The strength of may be set more strongly. When a person is present around the serving robot 40, the first UV light emitting module 51 and the second UV light emitting module 52a, 52b, 52c are off even though the serving robot 40 is located in the recess. It will be readily understood by those of ordinary skill in the art.

When a plurality of people exist around the serving robot 40 according to the embodiment, it is determined based on the distance between each person and the serving robot 40 and the relative speed between each person and the serving robot 40 . The central emission wavelength and intensity of the emitted UV light of the first UV light emitting module 51 and the second UV light emitting module 52a, 52b, and 52c may be determined based on the target. For example, based on the distance between each person and the serving robot 40 and the relative speed between each person and the serving robot 40, the target that will most quickly reach the threshold distance described above may be determined, The central emission wavelength and intensity of the emitted UV light of the first UV light emitting module 51 and the second UV light emitting module 52a, 52b, and 52c may be determined based on the target. The method of determining the central emission wavelength and the intensity of the emitted ultraviolet light of the first ultraviolet light emitting module 51 and the second ultraviolet light emitting module 52a, 52b, and 52c with respect to the target may be the same as the method described above.

6A and 6B are diagrams illustrating a serving robot 100A according to another embodiment of the present invention. 6A and 6B are diagrams showing the shape of the serving robot 100A viewed from different directions.

6A and 6B , the serving robot 100A according to an embodiment of the present invention includes a plurality of trays 10 and a tray receiving part 20A that provides an accommodating space in which the plurality of trays 10 are accommodated. may include In addition, the serving robot 100A may include a traveling unit 30 provided under the tray receiving unit 20A to enable movement of the tray receiving unit 20A, and on the outside of the tray receiving unit 20A. It may include the provided display unit 40 . The tray 10 , the tray receiving unit 20A, the traveling unit 30 , and the display unit 40 may be the same as or similar to those described with reference to FIGS. 1A and 1B . In addition, the serving robot 100A may include an 'ultraviolet sterilization member' as described with reference to FIGS. 2 to 5 .

In addition, the serving robot 100A according to the present embodiment may further include a drawer-type receiving member 60 provided between the tray receiving unit 20A and the traveling unit 30 . 6A shows a state in which the drawer-type accommodating member 60 is closed, and FIG. 6B shows a state in which the drawer-type accommodating member 60 is open. The drawer-type storage member 60 may be usefully used to store and provide various items related to food serving.

According to the embodiments of the present invention described above, it is possible to implement a serving robot that can effectively (smoothly/stable) perform a food serving function while also easily performing prevention/sterilization and related maintenance. By using the serving robot according to the embodiment, it is possible to increase the stability and efficiency of food serving. In addition, if the serving robot for the embodiment is used, it is possible to obtain the effect of facilitating the prevention/sterilization and related maintenance.

In the present specification, preferred embodiments of the present invention have been disclosed, and although specific terms are used, these are only used in a general sense to easily describe the technical content of the present invention and help the understanding of the present invention, and to limit the scope of the present invention. It is not meant to be limiting. It will be apparent to those of ordinary skill in the art to which the present invention pertains that other modifications based on the technical spirit of the present invention can be implemented in addition to the embodiments disclosed herein. For example, those of ordinary skill in the art will know that the serving robot according to the embodiments described with reference to FIGS. 1A to 6B can be variously modified. Therefore, the scope of the invention should not be determined by the described embodiments, but should be determined by the technical idea described in the claims.

* Explanation of symbols for the main parts of the drawing *
10: tray 15: support
20, 20A: tray accommodating part 21: support pillar part
22: first extension 23: second extension
25: first side wall portion 27: second side wall portion
29: upper cover part 30: traveling unit
40: display unit 50: ultraviolet sterilization member
51: first ultraviolet light emitting module 52, 52a-52c: second ultraviolet light emitting module
60: drawer-type storage member 100, 100A: serving robot
G10: Home W1: Sight window

Claims (7)

A serving robot for serving food, comprising:
a plurality of trays on which food or trays containing food are placed;
a tray accommodating part providing an accommodating space in which the plurality of trays are accommodated;
an ultraviolet sterilization member provided to sterilize the plurality of trays and the accommodating space using ultraviolet rays;
a traveling unit provided under the tray receiving unit and enabling movement of the tray receiving unit; and
A serving robot including; a display unit provided on the outside of the tray receiving unit and configured to display at least information related to serving of food. The method of claim 1,
The tray receiving unit includes a support pillar, and the plurality of trays are vertically spaced apart from each other and installed on one side of the supporting pillar.
The first end of the tray is fixed to the support pillar and installed,
The ultraviolet sterilization member is a serving robot comprising at least one of a first ultraviolet light emitting module provided adjacent to the first end of the tray and a second ultraviolet light emitting module provided on a lower surface of the tray. 3. The method of claim 2,
The first UV light emitting module and the second UV light emitting module are disposed perpendicular to each other. 3. The method of claim 2,
A serving robot in which a plurality of the second UV light emitting modules are spaced apart from each other on the lower surface of the tray. 3. The method of claim 2,
The first UV light emitting module and the second UV light emitting module have different central emission wavelengths. 3. The method of claim 2,
The first UV light emitting module and the second UV light emitting module maintain an off state when a person is located within a threshold distance from the serving robot, a serving robot. The method of claim 1,
The first UV light emitting module and the second UV light emitting module are the serving robot, the central light emitting wavelength is adjusted based on the distance between the serving robot and surrounding people.

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