Double-frequency multi-heat-source microwave oven with self-cleaning function and control system and method

Abstract

The invention discloses a double-frequency multi-heat-source microwave oven with a self-cleaning function and a control system and method, and belongs to the technical field of microwave ovens. A radio frequency solid state source is installed on a microwave oven heating box, and radio frequency heating devices, radio frequency heating device wires and microwave heating devices are installed on the three sides of the microwave oven heating box respectively; a self-cleaning device placing frame is installed on one side of the microwave oven heating box, a self-cleaning device placing frame lifting door is installed on the self-cleaning device placing frame, and a low-temperature plasma purifying device is installed in the microwave oven heating box. The functions of automatic heating and opening and closing operation are achieved through linkage of a goods inlet automatic door, a goods outlet automatic door, a radio frequency heating device, a microwave heating device, a rotary disc motor, a goods push-out device, a rotary disc and a motor, and disinfection and killing operation is conducted through an ultraviolet disinfection and killing device and a low-temperature plasma purification device. And odor generated by the heated material is discharged through an odor discharge hole, so that the functions of automatic odor removal and disinfection are realized.

Description

Technical Field

[0001] The present invention relates to a dual - frequency multi - heat - source microwave oven with a self - cleaning function, and particularly to a dual - frequency multi - heat - source microwave oven with a self - cleaning function, a control system and a method, belonging to the technical field of microwave ovens. Background Art

[0002] With the acceleration of the pace of life, modern consumers' demand for the convenience and immediacy of food is increasing day by day. Most food retail cabinets on the market usually only provide refrigerated or room - temperature food. Consumers often need to heat it additionally after purchase, causing inconvenience.

[0003] Although a small number of food retail cabinets with heating functions can heat food, some require consumers to manually take it out and put it into the microwave oven. At the same time, most heating modules use one or two magnetron heat sources for heating, with a long heating time, poor heating uniformity, and some cold spots remaining in some foods after heating, resulting in some undercooked food after heating and a low degree of food quality restoration after heating. Therefore, it causes a poor shopping experience for consumers.

[0004] For example, a microwave oven heating device for a vending cabinet disclosed in the application number: 201711424928.2 includes a microwave oven body, a microwave oven door, and a delivery board control device. A microwave generator capable of emitting microwaves is provided at the upper end of the microwave oven body. A control motor for controlling the opening and closing of the microwave oven door is fixed at the bottom of the microwave oven body. A delivery board control device is installed on the side of the microwave oven body. The bottom of the microwave oven door is connected to the output end of the control motor. A lunch box placement board with an arc shape and a baffle at the end is provided on the inner wall of the microwave oven door. A flip - up delivery board is installed at the top of the microwave oven door. The delivery board control device is an electromagnet control device, which has the advantages of convenient taking of heated goods, good safety, high heating efficiency, and can be installed inside an automatic vending cabinet to automatically heat goods.

[0005] Based on retrieval and analysis, it is found that the existing technology still has deficiencies:

[0006] The frequent use of the heating device will cause bacteria to breed and food fume odor to remain in the device, which will further affect food safety. For this, it is necessary to arrange for manual cleaning of the heating device regularly, thus increasing the cost.

[0007] Therefore, based on the above deficiencies, it is necessary to develop a dual - frequency multi - heat - source microwave oven with a self - cleaning function, a control system and a method to improve the above deficiencies. Summary of the Invention

[0008] The main purpose of the present invention is to provide a dual - frequency multi - heat - source microwave oven with a self - cleaning function.

[0009] The object of the present invention can be achieved by adopting the following technical solutions:

[0010] A dual - frequency multi - heat - source microwave oven with self - cleaning function, comprising a microwave oven body support frame for installation and positioning. Inside the microwave oven body support frame, a microwave oven heating box is installed. A microwave oven cavity is provided inside the microwave oven heating box. A radio - frequency solid - state source is installed on the microwave oven heating box. Radio - frequency heating devices, radio - frequency heating device wires, and microwave heating devices are respectively installed on three sides of the microwave oven heating box;

[0011] On one side of the microwave oven heating box, a self - cleaning device placement rack is installed, and a lifting door of the self - cleaning device placement rack is installed on the self - cleaning device placement rack;

[0012] A low - temperature plasma purification device is installed inside the microwave oven heating box, and a self - cleaning device placement rack is installed on one side of the low - temperature plasma purification device;

[0013] An automatic door assembly is installed inside the microwave oven body support frame. A commodity pushing assembly is installed inside the microwave oven heating box on the microwave oven body support frame. A portrait collection and operation assembly is installed on the outer side of the microwave oven heating box. A steering assembly is installed inside the microwave oven heating box.

[0014] Preferably, the automatic door assembly includes an incoming goods automatic door, a driving part, a piston rod, a connecting slider, and a sliding groove;

[0015] A sliding groove is provided on the microwave oven body support frame. A connecting slider is slidably installed inside the sliding groove. An incoming goods automatic door is installed on the outer side of the connecting slider. A driving part is installed on one side of the microwave oven body support frame. A piston rod is installed at the output end of the driving part, and a connecting slider is installed at the output end of the piston rod.

[0016] Preferably, the commodity pushing assembly includes a commodity pushing device, a push - plate fixing frame, and a push - plate. A commodity pushing device is installed inside the microwave oven heating box. The commodity pushing device is composed of a push - plate fixing frame and a push - plate. A push - plate is installed on the push - plate fixing frame.

[0017] Preferably, the portrait collection and operation assembly includes a data collection part and an operation panel. An operation panel is installed on the outer side of the incoming goods automatic door, and a data collection part is installed above the operation panel.

[0018] Preferably, the steering assembly includes a turntable motor and a turntable. The turntable is installed at the bottom inside the microwave oven heating box. The turntable motor is installed at the bottom of the microwave oven heating box, and the turntable motor is foldably connected to the turntable.

[0019] Preferably, the data acquisition component is electrically connected to the operation panel, the ultraviolet disinfection device, the low-temperature plasma purification device, and the driving component. An odor discharge hole is provided on one side of the radio frequency heating device on the microwave heating box. The microwave heating device has a two-group structure. A motor is installed on one side of the microwave oven body support frame at the bottom of the microwave heating box, and the motor is connected to the lifting of the shipping automatic door in a driving manner.

[0020] Preferably, the commodity pushing device, the turntable, the ultraviolet disinfection device, and the low-temperature plasma purification device are placed inside the microwave heating box. The microwave heating device, the self-cleaning device placement rack, and the self-cleaning device placement rack lifting door are connected to the microwave heating box. An output automatic door is provided on one side of the microwave oven body support frame, and anti-flow grooves are distributed around the inner circle of the output automatic door.

[0021] Preferably, the dual-frequency multi-heat-source microwave oven control system includes starting the microwave oven, automatically opening and closing the microwave oven, temperature control, heating treatment, and disinfection and odor removal treatment.

[0022] Preferably, starting the microwave oven consists of a portrait acquisition system and an operating system;

[0023] After the portrait acquisition system acquires the portrait, it transmits it to the opening and closing control device. After opening, the heating material is put in and then closed again.

[0024] A dual-frequency multi-heat-source microwave oven with a self-cleaning function further includes a method. The microwave oven method includes the following steps:

[0025] Step 1: On the basis of the original data acquisition component, a millimeter-wave radar, an infrared thermal imaging sensor, and a laser ranging module are introduced to construct a multi-sensor fusion system. The millimeter-wave radar can accurately detect the speed and acceleration of the transmission trolley. The infrared thermal imaging sensor assists in identifying lunch boxes at different temperatures. The laser ranging module is used to measure the precise distance between the goods and the inside of the cavity. A deep learning model is deployed to perform real-time analysis on the collected portrait, trolley, and goods images. Portrait feature recognition is achieved through a convolutional neural network (CNN) to judge the user's identity and behavior intention; Object detection algorithms (such as the YOLO series) are used to identify the types and packaging status of lunch boxes, providing a basis for setting subsequent heating parameters. At the same time, the system can be trained through historical data to continuously optimize the recognition accuracy;

[0026] Step 2: Pressure sensors and light curtain sensing devices are installed on the inbound automatic door and the outbound automatic door. When an obstacle is detected during the closing process of the automatic door, it will immediately stop and open in the reverse direction to avoid pinching people or damaging goods. In addition, flexible buffer materials are used at the edges of the automatic doors to further improve safety performance. The transfer cart is equipped with an independent control system and a wireless communication module, which can receive instructions from the central controller, plan the optimal driving path, and ensure the stable operation of the cart in a complex environment through a combination of inertial navigation and visual positioning. When multiple transfer tasks exist simultaneously, the system performs intelligent scheduling based on task priorities and the position of the cart to improve work efficiency;

[0027] Step 3: The radio frequency heating device and the microwave heating device support multi-band adjustment. According to the material, capacity, and food type of the lunch box, the power ratio and emission time of radio frequency and microwave are automatically adjusted. For example, for lunch boxes with metal packaging, the radio frequency power is automatically reduced to avoid arcing. For foods with a high moisture content, the microwave heating time is increased to ensure uniform heating. Multiple high-precision temperature sensors are installed inside the microwave cavity to collect temperature data on the surface and inside of the lunch box in real time, transmit the temperature data to the central controller, compare it with the preset heating curve, and dynamically adjust the heating power and time;

[0028] Step 4: The push plate of the product ejection device is made of elastic material and is equipped with a pressure sensor. During the process of pushing the lunch box, the thrust force is automatically adjusted according to the weight and resistance of the lunch box to prevent damage or spilling of the lunch box due to excessive thrust. At the same time, the movement speed of the push plate can be adjusted according to the congestion situation at the meal outlet to ensure smooth meal delivery;

[0029] A face recognition and fingerprint recognition module is set at the meal outlet. Users need to undergo identity verification when picking up meals to ensure the accurate delivery of meals. An infrared sensing device is installed inside the meal outlet. When it detects that the lunch box has been taken away, it automatically triggers a cleaning program to disinfect and wipe the surface of the meal outlet to maintain a hygienic environment;

[0030] Step 5: The lifting door of the placement rack of the self-cleaning device adopts a sealed design to prevent gas leakage during the disinfection process. The ultraviolet disinfection device is equipped with a rotatable ultraviolet lamp tube to expand the irradiation range and ensure that there are no dead corners in the cavity during disinfection. The low-temperature plasma purification device is added with an activated carbon filter layer to effectively adsorb odors and harmful gases and improve the purification effect. According to the usage frequency and time interval, the system automatically formulates a disinfection plan. For example, the disinfection frequency is increased during peak hours, and deep disinfection is carried out during non-business hours. At the same time, the ozone concentration and air quality inside the cavity are monitored in real time during the disinfection process. When the safety standard is reached, the disinfection is automatically stopped and the ventilation fan inside the odor discharge hole is turned on for ventilation to ensure user safety;

[0031] Steps: Build a central control system based on the Internet of Things (IoT) to achieve unified management and coordinated control of components such as data acquisition components, operation panels, automatic doors, heating devices, product ejection devices, and self-cleaning devices. Through the cloud computing platform, real-time analysis of equipment operation data is carried out to predict equipment failures and give early warnings, reducing maintenance costs. The operation panel is upgraded to a touch-type high-definition display screen, supporting voice interaction functions for convenient user operation. At the same time, management personnel can remotely monitor the equipment operation status, view sales data, adjust heating parameters, and issue disinfection tasks through the mobile phone APP or the Web end.

[0032] The beneficial technical effects of the present invention:

[0033] A dual-frequency multi-heat-source microwave oven with a self-cleaning function provided by the present invention realizes the functions of automatic heating and opening / closing operations through the inlet automatic door, outlet automatic door, radio frequency heating device, microwave heating device, turntable motor, product ejection device, turntable, and motor linkage. Disinfection operations are carried out through the ultraviolet disinfection device and the low-temperature plasma purification device, and the odor generated by the heated material is discharged through the odor discharge hole to realize the functions of automatic odor purification and disinfection. Description of the Drawings

[0034] Figure 1 It is a schematic perspective view of the overall device structure of a preferred embodiment of a dual-frequency multi-heat-source microwave oven with a self-cleaning function, a control system, and a method according to the present invention;

[0035] Figure 2 It is a schematic side view of a preferred embodiment of a dual-frequency multi-heat-source microwave oven with a self-cleaning function, a control system, and a method according to the present invention;

[0036] Figure 3 It is a top view of a preferred embodiment of a dual-frequency multi-heat-source microwave oven with a self-cleaning function, a control system, and a method according to the present invention;

[0037] Figure 4 It is a side view of a preferred embodiment of a dual-frequency multi-heat-source microwave oven with a self-cleaning function, a control system, and a method according to the present invention;

[0038] Figure 5 It is a partial schematic view of a preferred embodiment of a dual-frequency multi-heat-source microwave oven with a self-cleaning function, a control system, and a method according to the present invention;

[0039] Figure 6 It is a schematic structural view of the microwave heating device of a preferred embodiment of a dual-frequency multi-heat-source microwave oven with a self-cleaning function, a control system, and a method according to the present invention;

[0040] Figure 7Schematic diagram of the turntable structure of a preferred embodiment of a dual-frequency multi-heat-source microwave oven with self-cleaning function, control system and method according to the present invention;

[0041] Figure 8 Schematic diagram of the structure of the radio frequency heating device of a preferred embodiment of a dual-frequency multi-heat-source microwave oven with self-cleaning function, control system and method according to the present invention;

[0042] Figure 9 Schematic diagram of the structure of the push plate fixing frame of a preferred embodiment of a dual-frequency multi-heat-source microwave oven with self-cleaning function, control system and method according to the present invention;

[0043] Figure 10 Side view of the microwave heating device of a preferred embodiment of a dual-frequency multi-heat-source microwave oven with self-cleaning function, control system and method according to the present invention;

[0044] Figure 11 Schematic diagram of the partial structure of a preferred embodiment of a dual-frequency multi-heat-source microwave oven with self-cleaning function, control system and method according to the present invention;

[0045] Figure 12 Schematic diagram of the system framework of a preferred embodiment of a dual-frequency multi-heat-source microwave oven with self-cleaning function, control system and method according to the present invention.

[0046] In the figure: 1. Microwave oven body support frame; 2. Microwave oven cavity; 3. Inlet automatic door; 4. Outlet automatic door; 5. Radio frequency heating device; 6. Microwave heating device; 7. Turntable motor; 8. Commodity pushing device; 9. Turntable; 10. Motor; 11. Ultraviolet disinfection device, 12. Low-temperature plasma purification device; 13. Self-cleaning device placement rack, 14. Self-cleaning device placement rack lifting door; 15. Radio frequency solid state source; 16. Driving member; 17. Piston rod; 18. Connecting slider; 19. Sliding groove; 20. Data acquisition member; 21. Operation panel; 22. Odor discharge hole; 23. Microwave oven heating box; 41. Choke groove; 51. Radio frequency heating device wire; 81. Push plate fixing frame; 82. Push plate. Detailed implementation manners

[0047] To make the technical solutions of the present invention clearer and more definite to those skilled in the art, the present invention will be further described in detail below with reference to the embodiments and the accompanying drawings, but the implementation manners of the present invention are not limited thereto.

[0048] The present invention is as Figures 1 to 6, a dual - frequency multi - heat - source microwave oven with self - cleaning function suitable for retail cabinets, mainly composed of an automatic inlet door 3, a microwave oven body support frame 1, a microwave oven cavity 2, an automatic outlet door 4, a radio - frequency heating device 5, a microwave heating device 6, a turntable motor 7, a commodity pushing device 8, a turntable 9, a motor 10, an ultraviolet disinfection device 11, a low - temperature plasma purification device 12, a self - cleaning device placement rack 13, a self - cleaning device placement rack lifting door 14, and a radio - frequency solid - state source 15;

[0049] The automatic inlet door 1 is arranged on the left side of the microwave oven body support frame and is driven by the motor 10 to move back and forth. The automatic outlet door 4 is arranged at the front end of the microwave oven body support frame 2 and is driven by the motor 10 to move up and down. The radio - frequency heating device 5 is arranged at the top outside the microwave oven cavity 2 and is used to heat food during use, accelerating the food thawing speed by using electromagnetic fields of different frequencies. The microwave heating device 6 is arranged at the rear end and the right side of the microwave oven cavity 2 and is used to heat food;

[0050] The commodity pushing device 8 is arranged at the rear end inside the microwave oven cavity 3. The commodity pushing device 8 is used to push the heated food out of the automatic outlet door 4 during use. The commodity pushing device 8 cooperates with the automatic outlet door 4. After the food is heated, the automatic outlet door 4 rises, and then the commodity pushing device 8 pushes the food out. In the present invention, the commodity pushing device 8 includes a push plate 82 and a push - plate fixing frame 81;

[0051] The turntable 9 is arranged at the bottom inside the microwave oven cavity 2. Food enters the microwave oven cavity 2 through the automatic inlet door 3, stops on the turntable 9, and then starts to be heated. The turntable 9 starts to rotate under the control of the turntable motor 7. Through the rotation of the turntable, the structures of both the automatic inlet door 3 and the automatic outlet door 4 adopt the choke groove 41 structure to reduce microwave leakage. Refer to Figure 2 , the radio - frequency solid - state emission source 15 is connected to the radio - frequency heating device through a wire 51, and the radio - frequency band is introduced into the microwave oven through the radio - frequency heating device 5;

[0052] When the automatic retail cabinet is transported to the automatic inlet door 3 by a transmission cart, the automatic inlet door 3 automatically opens. The transmission cart pushes the meal box into the microwave oven cavity. When the meal box is at the center of the turntable 9, the pushing stops, the transmission cart withdraws, and the automatic inlet door 3 closes. The radio - frequency heating device 5 and the microwave heating device 6 emit radio - frequency and microwave to the microwave oven cavity 2 to heat the meal box. The turntable 9 starts to rotate together with the meal box. When the heating is completed, the automatic outlet door 4 descends, and the commodity pushing device 8 drives the push plate 82 to push forward through a servo motor, pushing the meal box out. After the meal box is pushed out, it can slide to the meal outlet of the automatic retail cabinet. When the microwave oven stops heating, through intelligent recognition, the radio - frequency heating device 5 and the microwave heating device 6 stop working;

[0053] When the automatic door for incoming goods and the 3 - structure and the automatic door for outgoing goods 4 are closed, the lifting door 14 of the self - cleaning device placement rack rises, and the ultraviolet disinfection device 11 and the low - temperature plasma purification device 12 start to work at intervals. The whole process is controlled by a dual - frequency multi - heat - source microwave oven system, which includes starting the microwave oven, automatically opening and closing the microwave oven, temperature control, heating treatment, and disinfection and odor removal treatment. Starting the microwave oven consists of a portrait acquisition system and an operating system. After the portrait acquisition system acquires the portrait, it transmits it to the opening and closing control device. After opening, the heating material is put in and then closed again to achieve systematic operation. Refer to Figure 12 。

[0054] The above - mentioned are only further embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the scope disclosed by the present invention, according to the technical solution and its concept of the present invention, makes equivalent substitutions or changes, all belong to the protection scope of the present invention.

Claims

1. A dual-frequency multi-heat source microwave oven with self-cleaning function, characterized in that: The invention comprises a microwave oven body support frame (1) for installation and position limiting, a microwave oven heating box (23) is installed on the inner side of the microwave oven body support frame (1), a microwave oven cavity (2) is provided in the microwave oven heating box (23), a radio frequency solid-state source (15) is installed on the microwave oven heating box (23), and a radio frequency heating device (5), a radio frequency heating device wire (51) and a microwave heating device (6) are installed on three sides of the microwave oven heating box (23) respectively; A self-cleaning device placement rack (13) is installed on one side of the microwave oven heating box (23), and a self-cleaning device placement rack lifting door (14) is installed on the self-cleaning device placement rack (13); A low-temperature plasma purification device (12) is installed in the microwave oven heating box (23), and a self-cleaning device placement rack (13) is installed on one side of the low-temperature plasma purification device (12); An automatic door assembly is installed inside the microwave oven body support frame (1), a commodity pushing assembly is installed inside the microwave oven heating box (23) on the microwave oven body support frame (1), a portrait collecting and operating assembly is installed outside the microwave oven heating box (23), and a steering assembly is installed inside the microwave oven heating box (23).

2. A dual-frequency multi-heat source microwave oven with self-cleaning function according to claim 1, characterized in that: The automatic door assembly comprises an automatic door for receiving goods (3), a driving member (16), a piston rod (17), a connecting slide block (18) and a sliding groove (19); A microwave oven body support frame (1) is provided with a sliding groove (19), a connecting slide block (18) is slidably mounted in the sliding groove (19), an automatic door (3) for receiving goods is mounted outside the connecting slide block (18), a driving member (16) is mounted on one side of the microwave oven body support frame (1), a piston rod (17) is mounted on the output end of the driving member (16), and a connecting slide block (18) is mounted on the output end of the piston rod (17).

3. A dual-frequency multi-heat source microwave oven with self-cleaning function according to claim 2, characterized in that: The commodity pushing component comprises a commodity pushing device (8), a pushing plate fixing frame (81) and a pushing plate (82). The commodity pushing device (8) is installed inside a microwave oven heating box (23). The commodity pushing device (8) is composed of a pushing plate fixing frame (81) and a pushing plate (82). The pushing plate fixing frame (81) is installed with the pushing plate (82).

4. A dual-frequency multi-heat source microwave oven with self-cleaning function according to claim 3, characterized in that: The portrait collection and operation component comprises a data collection component (20) and an operation panel (21). The operation panel (21) is installed on the outer side of the automatic goods receiving door (3), and the data collection component (20) is installed above the operation panel (21).

5. A dual-frequency multi-heat source microwave oven with self-cleaning function according to claim 4, characterized in that: The steering assembly comprises a turntable motor (7) and a turntable (9); the turntable (9) is installed at the bottom of the microwave oven heating box (23); the turntable motor (7) is installed at the bottom of the microwave oven heating box (23); and the turntable motor (7) is foldably connected to the turntable (9).

6. A dual-frequency multi-heat source microwave oven with self-cleaning function according to claim 5, characterized in that: The data acquisition component (20) is electrically connected to the operation panel (21), the ultraviolet disinfection device (11), the low-temperature plasma purification device (12) and the driving component (16); one side of the radio frequency heating device (5) on the microwave oven heating box (23) is provided with an odor discharge hole (22); the microwave heating device (6) is a two-group structure; one side of the microwave oven body support frame (1) at the bottom of the microwave oven heating box (23) is provided with a motor (10); and the motor (10) is connected to the lifting drive of the automatic delivery door (4).

7. A dual-frequency multi-heat source microwave oven with self-cleaning function according to claim 6, characterized in that: The commodity ejection device (8), the turntable (9), the ultraviolet disinfection device (11) and the low-temperature plasma purification device (12) are placed in a microwave oven heating box (23); the microwave heating device (6), the self-cleaning device placement rack (13) and the self-cleaning device placement rack lifting door (14) are connected to the microwave oven heating box (23); an automatic delivery door (4) is provided on one side of the microwave oven body support frame (1); and anti-flow grooves (41) are distributed around the inner circle of the automatic delivery door (4).

8. A dual-frequency multi-heat source microwave oven control system with self-cleaning function, based on a dual-frequency multi-heat source microwave oven with self-cleaning function as claimed in any one of claims 1 to 8, characterized in that: The dual-frequency multi-heat source microwave oven control system includes starting the microwave oven, automatically opening and closing the microwave oven, temperature control, heating treatment and disinfection and deodorization treatment.

9. A dual-frequency multi-heat source microwave oven control system with self-cleaning function according to claim 8, characterized in that: Starting the microwave oven consists of a portrait acquisition system and an operating system; The portrait acquisition system acquires the portrait and transmits it to the opening and closing control device (3), which opens (3), puts the heating material in, and then closes again.

10. A control method for a dual-frequency multi-heat source microwave oven with a self-cleaning function, characterized in that: The microwave oven method comprises the following steps: Step 1: Based on the original data acquisition component (20), the millimeter wave radar, infrared thermal imaging sensor and laser ranging module are introduced to build a multi-sensor fusion system. The millimeter wave radar can accurately detect the speed and acceleration of the transmission trolley, the infrared thermal imaging sensor assists in identifying lunch boxes of different temperatures, and the laser ranging module is used to measure the precise distance between the goods and the inside of the cavity. The deep learning model is deployed to perform real-time analysis on the collected images of people, trolleys and goods. The convolutional neural network (CNN) is used to realize the recognition of human features and judge the user's identity and behavioral intentions; the target detection algorithm (such as the YOLO series) is used to identify the type and packaging status of the lunch box, providing a basis for the subsequent heating parameter setting. At the same time, the system can continuously optimize the recognition accuracy through historical data training; Step 2: Pressure sensors and light curtain sensing devices are installed on the incoming goods automatic door 3 and the outgoing goods automatic door 4. When an obstacle is detected during the closing process of the automatic door, it will stop immediately and open in the opposite direction to avoid pinching people or damaging goods. In addition, the edge of the automatic door uses flexible buffer materials to further improve safety performance. The transmission trolley is equipped with an independent control system and wireless communication module, which can receive instructions from the central controller and plan the optimal driving path. The combination of inertial navigation and visual positioning ensures that the trolley can run stably in complex environments. When multiple transmission tasks exist at the same time, the system performs intelligent scheduling according to task priority and trolley position to improve work efficiency; Step 3: The RF heating device 5 and the microwave heating device 6 support multi-band adjustment. According to the material, capacity and food type of the lunch box, the power ratio and emission time of the RF and microwave are automatically adjusted. For example, for metal-packaged lunch boxes, the RF power is automatically reduced to avoid ignition. For foods with high moisture content, the microwave heating time is increased to ensure uniform heating. Multiple high-precision temperature sensors are installed in the microwave oven cavity 2 to collect real-time surface and internal temperature data of the lunch box, transmit the temperature data to the central controller, compare it with the preset heating curve, and dynamically adjust the heating power and time; Step 4: The push plate 82 of the product ejection device 8 is made of elastic material and equipped with a pressure sensor. When pushing the lunch box, the thrust is automatically adjusted according to the weight and resistance of the lunch box to prevent the lunch box from being damaged or spilled due to excessive thrust. At the same time, the movement speed of the push plate can be adjusted according to the congestion of the meal outlet to ensure smooth meal delivery. The food outlet is equipped with face recognition and fingerprint recognition modules. Users need to authenticate their identity when picking up food to ensure accurate delivery of food. An infrared sensor is installed inside the food outlet. When it detects that the food box has been taken away, it automatically triggers the cleaning program to disinfect and wipe the surface of the food outlet to maintain a hygienic environment. Step 5: The lifting door 14 of the self-cleaning device placement rack adopts a sealed design to prevent gas leakage during the disinfection process. The ultraviolet disinfection device 11 is equipped with a rotatable ultraviolet lamp to expand the irradiation range and ensure that there is no dead corner inside the cavity. The low-temperature plasma purification device 12 adds an activated carbon filter layer to effectively absorb odor and harmful gases and improve the purification effect. According to the frequency of use and time interval, the system automatically formulates a disinfection plan. For example, the disinfection frequency is increased during peak hours and deep disinfection is performed during non-business hours. At the same time, the ozone concentration and air quality inside the cavity are monitored in real time during the disinfection process. When the safety standard is reached, the disinfection is automatically stopped and the ventilation fan in the odor discharge hole (22) is turned on for ventilation to ensure user safety; Step 5: Build a central control system based on the Internet of Things (IoT) to achieve unified management and coordinated control of various components such as data collection parts, operation panel 21, automatic doors, heating devices, product push devices 8 and self-cleaning devices. Through the cloud computing platform, the equipment operation data is analyzed in real time to predict equipment failures and issue early warnings to reduce maintenance costs. The operation panel (21) is upgraded to a touch-screen high-definition display screen that supports voice interaction functions to facilitate user operation. At the same time, managers can remotely monitor the equipment operation status, view sales data, adjust heating parameters, and issue disinfection tasks through mobile phone APP or Web terminals.

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