Kitchen oil temperature online monitoring and fire prevention method, system and device

Abstract

The invention relates to the technical field of kitchen safety control, in particular to a kitchen oil temperature online monitoring and fire prevention method. The method comprises the following steps of: monitoring the state of a person, meeting or manually starting oil temperature monitoring when the person leaves the field and the time delay is met, comparing according to the oil temperature, performing constant-on prompt of a corresponding color lamp when the person is at a process temperature, performing sound-light alarm when the person exceeds an overheat threshold, cutting off energy, and resetting. Based on the provided method, the invention further provides a kitchen oil temperature online monitoring and fire prevention system which comprises a human body induction module, an oil temperature monitoring module, a control module, an alarm module, an energy control module, a man-machine interaction module and a wireless communication module. In addition, the invention further provides a kitchen oil temperature online monitoring and fire prevention device. According to the invention, frying process standardization is realized, and full-scene safety control of non-interference operation of personnel on the scene, automatic monitoring of personnel leaving the scene and active energy failure of oil temperature overrun is realized at the same time.

Description

Technical Field

[0001] This invention relates to the field of kitchen safety control technology, specifically to a method, system, and device for online monitoring of kitchen oil temperature and fire prevention. Background Technology

[0002] In food processing or cooking, controlling the heating temperature of cooking oil is crucial for ensuring cooking safety. When the oil temperature is too low, the cooking effect of the ingredients will be greatly reduced, failing to achieve the desired color and taste. Conversely, if the oil temperature is too high, it will not only negatively impact the quality of the final product and accelerate the aging process of the cooking oil, but more seriously, it may cause a fire in the oil pan. Especially when operators leave the stove temporarily, an unattended hot oil pan can easily escalate into a fire, causing property damage and even personal injury.

[0003] Currently, in most practical scenarios, operators mainly rely on visual inspection and experience to judge oil temperature, or use handheld thermometers for temporary measurements. However, this method has significant limitations, failing to achieve "automatic monitoring in unattended situations," resulting in blind spots when operators leave, making it difficult to eliminate safety hazards. Some methods use fixed temperature sensors, which, because the sensors are constantly above the stove or directly submerged in the oil, severely interfere with normal manual operations such as stirring and flipping, greatly reducing the convenience and smoothness of cooking, and significantly diminishing their practicality. Other methods use infrared temperature measurement, which cleverly avoids the influence of sensor installation on operation, but in environments with heavy oil fumes, the infrared sensor signal is strongly interfered with and attenuated, resulting in large errors in the measured temperature data, making it difficult to meet the needs of accurate monitoring. Summary of the Invention

[0004] In view of this, the present invention aims to solve the technical problems of existing food processing or kitchen oil temperature monitoring devices being unable to adaptively avoid manual operation, lack of monitoring in unattended states, and delayed fire prevention response. It aims to achieve standardization of frying processes while realizing full-scenario safety control that allows personnel to operate without interference, automatically monitor when personnel leave the site, and actively shut off power when oil temperature exceeds the limit.

[0005] To achieve the aforementioned objectives, the first aspect of this invention provides a method for online monitoring of kitchen oil temperature and fire prevention, comprising:

[0006] S1. Collect the status signals of personnel in the stove operation area;

[0007] S2. Determine if personnel are present: If it is determined that personnel have left the site and the preset delay condition is met, or if it is determined that personnel are present and a manual command to monitor oil temperature is issued, then proceed to step S3.

[0008] S3, drive the temperature sensor down to the monitoring position and collect real-time oil temperature data;

[0009] S4. Compare the real-time oil temperature data with the preset process temperature range and overheating temperature threshold.

[0010] S5. If the oil temperature is within a certain process temperature range, control the corresponding color alarm light to stay on to indicate the current process status.

[0011] S6. If the oil temperature exceeds the overheating threshold, the alarm will be activated and the red alarm light will flash. At the same time, the energy supply to the gas and electric heating equipment will be cut off.

[0012] S7: Receive reset command, stop alarm and restore power supply.

[0013] Furthermore, the personnel status signal mentioned in step S1 is collected by an infrared sensor, a microwave sensor, or an ultrasonic sensor, with the sensing range covering the stove operation area, the sensing horizontal angle range being 120° to 150°, and the sensing distance being 0.5 to 3 meters.

[0014] Furthermore, the temperature sensor mentioned in step S3 is controlled by the lifting drive unit. The lifting drive unit adopts a stepper motor with a lead screw transmission mechanism or an electric cylinder structure. The lifting stroke is 0 to 100 cm. The monitoring position is when the probe is immersed 1 to 10 cm below the oil surface. The temperature sensor adopts a platinum resistance PT100 or a thermocouple sensor. The measurement range is -20℃ to 400℃, and the accuracy is ±0.5℃.

[0015] Furthermore, the process temperature range in step S4 includes at least: a low-temperature cooking range of 100°C to 120°C, a frying range of 160°C to 180°C, and a high-temperature frying range of 180°C to 190°C; the overheating temperature threshold is set between 200°C and 240°C.

[0016] Furthermore, the alarm module in step S6 includes a multi-color LED alarm light and an audible and visual alarm, wherein the sound pressure level of the audible and visual alarm is not less than 85 decibels.

[0017] A second aspect of the present invention provides a kitchen oil temperature online monitoring and fire prevention system, comprising:

[0018] The human body sensing module is used to collect the status signals of personnel in the stove operation area;

[0019] The oil temperature monitoring module includes a temperature sensor and a lifting drive unit, which is used to drive the temperature sensor down to the monitoring position and collect real-time oil temperature data when it is determined that the personnel have left the site and the preset delay condition is met.

[0020] The control module compares the real-time oil temperature data with the preset process temperature range and overheating temperature threshold, and outputs control commands based on the comparison results.

[0021] The alarm module is used to keep the corresponding color alarm light on when the oil temperature is within a certain process temperature range to indicate the current process status, and to trigger an alarm when the oil temperature exceeds the overheating temperature threshold.

[0022] The energy control module, including a gas control unit and a power control unit, is used to simultaneously cut off the energy supply to the gas and electric heating equipment when the oil temperature exceeds the overheating temperature threshold.

[0023] The human-computer interaction module is used for parameter setting and status display;

[0024] The wireless communication module is used for remote control and alarm information transmission.

[0025] Furthermore, the preset logic of the control module is as follows:

[0026] When the signal from the human body sensor module is "personnel departure signal" and the preset delay condition is met, or when the signal from the wireless communication module is "manual descent", a descent command is output to the lifting drive unit. The lifting drive unit drives the temperature sensor to descend into the stove, and then returns the temperature signal from the temperature sensor to the control module. The control module compares the real-time oil temperature data with the preset process temperature range and the overheating temperature threshold, and outputs control commands to the alarm module and the energy control module based on the comparison results. If the oil temperature is within a certain process temperature range, the corresponding color indicator light will remain on to indicate the current process status. If the oil temperature exceeds the overheating temperature threshold, the alarm module will be activated and the energy supply to the gas and electric heating equipment will be cut off simultaneously.

[0027] When the human body sensor receives a signal indicating "personnel presence" or the wireless communication module receives a signal indicating "manual rise", the control module drives the temperature sensor to the raised position.

[0028] A third aspect of the present invention provides a kitchen oil temperature online monitoring and fire prevention device, comprising:

[0029] The system includes a human body sensor, a temperature sensor, a lifting drive unit, a control box, an alarm light, a temperature controller, a mobile base, an audible and visual alarm, a wireless remote control, and an energy control unit. The lifting drive unit includes an electric cylinder and a sensor bracket. The control box has a built-in PLC controller and a remote signal transmitter. The energy control unit includes an electromagnetic gas valve and an AC contactor.

[0030] The movable base is located at the bottom of the device, and a bracket is fixedly connected to the upper part of the movable base. The upper end of the bracket is connected to the bottom of the control box. The upper part of the control box is equipped with a human body sensor and an alarm light, and the side of the control box is equipped with a temperature controller. The movable base is fixedly connected to the lower end of the electric cylinder bracket, the electric cylinder is fixedly connected to the electric cylinder bracket, the lower end of the sensor bracket is connected to the upper end of the electric cylinder, and the other end of the sensor bracket is connected to a temperature sensor so that the temperature sensor is perpendicular to the ground. The electric cylinder bracket is parallel to the bracket. The audible and visual alarm is located in the kitchen and the public area outside the kitchen. The audible and visual alarm is equipped with a remote signal receiver. The electromagnetic gas valve is installed on the gas pipeline, and the AC contactor is connected in series in the circuit of the electric heating equipment.

[0031] The human body sensor, temperature sensor, electric cylinder, alarm light and temperature controller all establish a communication connection with the PLC controller. The wireless remote control establishes a wireless communication connection with the PLC controller. The audible and visual alarm, electromagnetic gas valve and AC contactor all establish a wireless communication connection with the remote signal receiver. The remote signal transmitter and remote signal receiver establish a wireless communication connection.

[0032] Furthermore, the control box is also equipped with an automatic indicator light and a remote control indicator light to display the current mode.

[0033] Furthermore, the temperature controller includes a display screen and buttons. The buttons are used to set the personnel departure delay time, the process temperature range, and the overheating temperature threshold. The display screen shows the real-time oil temperature and the set parameters.

[0034] The beneficial effects of this invention are:

[0035] This invention uses human body sensing to automatically coordinate the raising and lowering of sensors, actively avoiding them during operation and automatically monitoring them after personnel leave, effectively resolving the conflict between monitoring and operation. The system adopts high-precision immersion / proximity temperature measurement technology, controlling the oil temperature measurement error within 0.5℃, significantly improving monitoring accuracy. When the oil temperature exceeds the set threshold, the system simultaneously triggers an audible and visual alarm and cuts off the power supply, achieving a leap from passive reminders to proactive fire prevention.

[0036] This invention integrates human body sensing, multi-mode monitoring, process prompts and energy control into one unit. All key parameters can be flexibly set, and it can be used in home kitchens, restaurant kitchens and factory monitoring scenarios, adapting to different cooking scenarios.

[0037] The device supports dual power supply modes: 220V AC mains power and battery power. A full charge allows for continuous operation for over 24 hours, facilitating flexible movement between workstations. Through precise temperature control, the device effectively reduces oil fume emissions and carcinogen formation while saving energy and reducing consumption, offering multiple benefits including energy conservation, emission reduction, and food safety assurance. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 This is a flowchart of the method of the present invention;

[0040] Figure 2 This is a schematic diagram of the device structure of the present invention. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] like Figure 1 As shown, in order to achieve the above-mentioned objectives, the first aspect of this invention provides a method for online monitoring of kitchen oil temperature and fire prevention, the method comprising the following steps:

[0043] S1. Collect the status signals of personnel in the stove operation area.

[0044] A human body sensor is installed at a predetermined height in front of the stove operating area to detect whether anyone is operating the stove. The human body sensor can be an infrared sensor, a microwave sensor, or an ultrasonic sensor. The sensing range covers the stove operating area, the horizontal sensing angle range is 120° to 150°, and the sensing distance is 0.5 to 3 meters.

[0045] The installation height can be adjusted according to the scenario. For example, in a home kitchen, it can be set at about 1.3m from the countertop, while in a restaurant kitchen, it can be raised or lowered appropriately to accommodate multi-burner stoves.

[0046] S2. Determine if there are personnel present. If it is determined that the personnel have left and the preset delay condition is met, or if it is determined that the personnel are present and a manual command to monitor the oil temperature is issued, then proceed to step S3.

[0047] The preset delay condition is the duration for which no human activity is detected continuously. This preset duration can be set within the range of 10 seconds to 5 minutes. For example, it can be set to 30 seconds for a home kitchen and 1 minute for a restaurant kitchen to prevent false alarms caused by short-term absence.

[0048] S3. Drive the temperature sensor down to the monitoring position and collect real-time oil temperature data.

[0049] The temperature sensor can be a platinum resistance thermometer (PT100) or a thermocouple sensor, with a measurement range of -20℃ to 400℃ and an accuracy of ±0.5℃. The preferred monitoring position is to immerse the probe 1 to 10 cm below the oil surface, which can be adjusted according to the depth of the cookware to achieve accurate temperature measurement.

[0050] The temperature sensor is controlled by a lifting drive unit, which can be a stepper motor with a lead screw transmission mechanism or an electric cylinder structure. The lifting stroke is 0 to 100 cm, and the monitoring position is when the probe is immersed 1 to 10 cm below the oil surface.

[0051] S4. Compare the real-time oil temperature data with the preset process temperature range and overheating temperature threshold.

[0052] For example, the process temperature range is: low temperature cooking: 100℃~120℃; frying: 160℃~180℃; high temperature frying: 180℃~190℃; the overheating temperature threshold can be set between 200℃~240℃, with a default value of 220℃.

[0053] It should be noted that the above process temperature range and overheating temperature threshold are only one example, and specific configurations can be customized according to different food processes.

[0054] S5. If the oil temperature is within a certain process temperature range, control the corresponding color alarm light to stay on to indicate the current process status.

[0055] The alarm lights indicate the current oil temperature and corresponding process status as follows: green light for 100℃~120℃; yellow light for 160℃~180℃; and blue light for 180℃~190℃.

[0056] It should be noted that the indicator lights corresponding to the above process temperature range are only one example, and the specific configuration can be customized according to different food processes.

[0057] S6. If the oil temperature exceeds the overheating threshold, the alarm will be activated and the energy supply to the gas and electric heating equipment will be cut off simultaneously.

[0058] The alarm is an audible and visual alarm with a sound pressure level of no less than 85 decibels to alert operators.

[0059] S7: Receive reset command, stop alarm and restore power supply.

[0060] In the alarm and power cut-off states, a reset command must be manually entered to deactivate the alarm and restore power supply.

[0061] A second aspect of the present invention provides a kitchen oil temperature online monitoring and fire prevention system, the system comprising:

[0062] The human body sensing module is located directly in front of the stove, and its sensing range covers the stove operation area. It is used to collect the status signals of people in the stove operation area to determine whether there are people present.

[0063] The oil temperature monitoring module includes a temperature sensor and a lifting drive unit, which is used to lower the sensor to the monitoring position and collect real-time oil temperature data when it is determined that personnel have left the site; the lifting drive unit is connected to the temperature sensor, so that the temperature sensor moves linearly in the vertical direction.

[0064] The control module receives input signals from the human body sensing module and the oil temperature monitoring module, and outputs control commands according to preset logic; it compares the real-time oil temperature data with the preset process temperature range and overheating temperature threshold, and outputs control commands based on the comparison results.

[0065] The alarm module is used to provide a prompt when the oil temperature is within the process temperature range and to trigger an alarm when the oil temperature exceeds the overheating threshold, until a reset command is manually entered.

[0066] The energy control module, including a gas control unit and a power control unit, is used to cut off the energy supply to the gas and electric heating equipment when the oil temperature exceeds the limit.

[0067] The human-machine interface module is used for parameter setting and status display. Parameter setting is achieved by manually inputting the values ​​of personnel departure delay, process temperature range, and overheating temperature threshold through the human-machine interface module. The status display allows users to view the real-time oil temperature and preset parameters.

[0068] The wireless communication module is used for remote control and alarm information transmission.

[0069] The preset logic of the control module is as follows:

[0070] When the signal from the human body sensor module is "personnel departure signal" or the signal from the wireless communication module is "manual descent", a descent command is output to the lifting drive unit. The lifting drive unit drives the temperature sensor to descend into the stove and then returns the temperature signal from the temperature sensor to the control module. The control module compares the real-time oil temperature data with the preset process temperature range and the overheating temperature threshold, and outputs control commands to the alarm module and the energy control module based on the comparison results. If the oil temperature is within a certain process temperature range, the corresponding color indicator light will remain on to indicate the current process status. If the oil temperature exceeds the overheating temperature threshold, the alarm module will be activated and the energy supply to the gas and electric heating equipment will be cut off simultaneously.

[0071] When the human body sensor receives a signal indicating "personnel presence" or the wireless communication module receives a signal indicating "manual rise", the control module drives the temperature sensor to the raised position.

[0072] like Figure 2 As shown, the third aspect of the present invention provides a kitchen oil temperature online monitoring and fire prevention device, which includes: a human body sensor 1, a temperature sensor 2, a lifting drive unit 3, a control box 4, an alarm light 5, a temperature controller 6, a mobile base 7, an audible and visual alarm 8, a wireless remote control and an energy control unit; the lifting drive unit 3 includes an electric cylinder 32, a sensor bracket 31 and an electric cylinder bracket 33, the control box 4 has a built-in PLC controller and a remote signal transmitter, and the energy control unit includes an electromagnetic gas valve and an AC contactor.

[0073] The movable base 7 is located at the bottom of the device. A bracket 9 is fixedly connected to the upper part of the movable base 7. The upper end of the bracket 9 is connected to the bottom of the control box 4. The upper part of the control box 4 is equipped with a human body sensor 1 and an alarm light 5. The side of the control box 4 is equipped with a temperature controller 6. The movable base 7 is fixedly connected to the lower end of the electric cylinder bracket 33. The electric cylinder 32 is fixedly connected to the electric cylinder bracket 33. The lower end of the sensor bracket 31 is connected to the upper end of the electric cylinder 32. The other end of the sensor bracket 31 is connected to the temperature sensor 2 so that the temperature sensor 2 is perpendicular to the ground. The electric cylinder bracket 33 is parallel to the bracket 9.

[0074] The audible and visual alarm 8 is installed in the kitchen and the public area outside the kitchen. The audible and visual alarm 8 is equipped with a remote signal receiver. The electromagnetic gas valve is installed on the gas pipeline. The AC contactor is connected in series in the circuit of the electric heating equipment.

[0075] When the oil temperature exceeds the overheating threshold, the red alarm light 5 flashes, the remote signal transmitter outputs a signal to the remote signal receiver, and the remote signal receiver then sends instructions to the audible and visual alarm 8, the electromagnetic gas valve, and the AC contactor, thereby activating the audible and visual alarm 8 to alert the operator, supplying power to the electromagnetic gas valve to close the gas pipeline, and de-energizing the AC contactor coil to cut off the power supply to the electric heating equipment.

[0076] Human body sensor 1, temperature sensor 2, electric cylinder 32, alarm light 5 and temperature controller 6 all establish communication connection with PLC controller. Wireless remote control establishes wireless communication connection with PLC controller. Audible and visual alarm 8, electromagnetic gas valve and AC contactor all establish wireless communication connection with remote signal receiver. Remote signal transmitter and remote signal receiver establish wireless communication connection.

[0077] The control box 4 is also equipped with indicator lights 10 for displaying the current mode, including automatic indicator light 101 and remote control indicator light 102. When in automatic monitoring mode, automatic indicator light 101 is always on, and when in manual monitoring mode, remote control indicator light 102 is always on.

[0078] The temperature controller 6 includes a display screen and buttons. The buttons are used to set the personnel departure delay time, process temperature range, and overheating temperature threshold. The display screen shows the real-time oil temperature and set parameters.

[0079] The operating procedure for this device is as follows:

[0080] Manual detection mode: After the operator sets the parameters on the temperature controller 6, press the manual descent button on the wireless remote control, and the temperature sensor 2 will descend to the monitoring position. The display screen will show the real-time oil temperature. Then press the manual revise button on the wireless remote control, and the temperature sensor 2 will rise back to the raised position.

[0081] Automatic monitoring mode: After the operator sets the parameters on the temperature controller 6, if the personnel leave the site for more than the preset personnel departure delay time, the temperature sensor 2 drops to the monitoring position, and the alarm light 5 corresponding to the current oil temperature in the process temperature range remains on. When the oil temperature exceeds the overheating temperature threshold, the red alarm light 5 flashes, the audible and visual alarm 8 is activated, and the energy supply to the gas and electric heating equipment is disconnected until the operator enters the reset button on the temperature controller 6 to restore the energy supply.

[0082] The above are merely embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A method for online monitoring of kitchen oil temperature and fire prevention, characterized in that, include: S1. Collect the status signals of personnel in the stove operation area; S2. Determine if personnel are present: If it is determined that personnel have left the site and the preset delay condition is met, or if it is determined that personnel are present and a manual command to monitor oil temperature is issued, then proceed to step S3. S3, drive the temperature sensor down to the monitoring position and collect real-time oil temperature data; S4. Compare the real-time oil temperature data with the preset process temperature range and overheating temperature threshold. S5. If the oil temperature is within a certain process temperature range, control the corresponding color alarm light to stay on to indicate the current process status. S6. If the oil temperature exceeds the overheating temperature threshold, the alarm will be activated and the red alarm light will flash. At the same time, the energy supply to the gas and electric heating equipment will be cut off. S7: Receive reset command, stop alarm and restore power supply.

2. The method for online monitoring of kitchen oil temperature and fire prevention according to claim 1, characterized in that, The personnel status signal mentioned in step S1 is collected by an infrared sensor, a microwave sensor or an ultrasonic sensor. The sensing range covers the stove operation area, the horizontal sensing angle range is 120° to 150°, and the sensing distance is 0.5 to 3 meters.

3. The method for online monitoring of kitchen oil temperature and fire prevention according to claim 1, characterized in that, The temperature sensor mentioned in step S3 is controlled by the lifting drive unit. The lifting drive unit adopts a stepper motor with a lead screw transmission mechanism or an electric cylinder structure. The lifting stroke is 0 to 100 cm. The monitoring position is when the probe is immersed 1 to 10 cm below the oil surface. The temperature sensor adopts a platinum resistance PT100 or a thermocouple sensor. The measurement range is -20℃ to 400℃, and the accuracy is ±0.5℃.

4. The method for online monitoring of kitchen oil temperature and fire prevention according to claim 1, characterized in that, The process temperature range in step S4 includes at least the following: low-temperature cooking range of 100°C to 120°C, frying range of 160°C to 180°C, and high-temperature frying range of 180°C to 190°C; the overheating temperature threshold is set between 200°C and 240°C.

5. The method for online monitoring of kitchen oil temperature and fire prevention according to claim 1, characterized in that, The alarm module in step S6 includes a multi-color LED alarm light and an audible and visual alarm, wherein the sound pressure level of the audible and visual alarm is not less than 85 decibels.

6. A kitchen oil temperature online monitoring and fire prevention system, characterized in that, include: The human body sensing module is used to collect the status signals of personnel in the stove operation area; The oil temperature monitoring module includes a temperature sensor and a lifting drive unit, which is used to drive the temperature sensor down to the monitoring position and collect real-time oil temperature data when it is determined that the personnel have left the site and the preset delay condition is met. The control module compares the real-time oil temperature data with the preset process temperature range and overheating temperature threshold, and outputs control commands based on the comparison results. The alarm module is used to keep the corresponding color alarm light on when the oil temperature is within a certain process temperature range to indicate the current process status, and to trigger an alarm when the oil temperature exceeds the overheating temperature threshold. The energy control module, including a gas control unit and a power control unit, is used to simultaneously cut off the energy supply to the gas and electric heating equipment when the oil temperature exceeds the overheating temperature threshold. The human-computer interaction module is used for parameter setting and status display; The wireless communication module is used for remote control and alarm information transmission.

7. The online kitchen oil temperature monitoring and fire prevention system according to claim 6, characterized in that, The preset logic of the control module is as follows: When the signal from the human body sensor module is "personnel leaving" and the preset delay condition is met, or when the signal from the wireless communication module is "manual descent," a descent command is output to the lifting drive unit. The lifting drive unit drives the temperature sensor to descend into the stove, and then returns the temperature signal from the temperature sensor to the control module. The control module compares the real-time oil temperature data with the preset process temperature range and the overheating temperature threshold, and outputs control commands to the alarm module and the energy control module based on the comparison results. If the oil temperature is within a certain process temperature range, the corresponding color indicator light will remain on to indicate the current process status. If the oil temperature exceeds the overheating temperature threshold, the alarm module will be activated and the energy supply to the gas and electric heating equipment will be cut off simultaneously. When the human body sensor receives a signal of "personnel presence" or the wireless communication module receives a signal of "manual rise", the control module drives the temperature sensor to the raised position.

8. A kitchen oil temperature online monitoring and fire prevention device, which integrates the kitchen oil temperature online monitoring and fire prevention system as described in claim 6, characterized in that, include: The system includes a human body sensor, a temperature sensor, a lifting drive unit, a control box, an alarm light, a temperature controller, a mobile base, an audible and visual alarm, a wireless remote control, and an energy control unit. The lifting drive unit includes an electric cylinder and a sensor bracket. The control box has a built-in PLC controller and a remote signal transmitter. The energy control unit includes an electromagnetic gas valve and an AC contactor. The movable base is located at the bottom of the device, and a bracket is fixedly connected to the upper part of the movable base. The upper end of the bracket is connected to the bottom of the control box. The upper part of the control box is equipped with a human body sensor and an alarm light, and the side of the control box is equipped with a temperature controller. The movable base is fixedly connected to the lower end of the electric cylinder bracket, the electric cylinder is fixedly connected to the electric cylinder bracket, the lower end of the sensor bracket is connected to the upper end of the electric cylinder, and the other end of the sensor bracket is connected to a temperature sensor so that the temperature sensor is perpendicular to the ground. The electric cylinder bracket is parallel to the bracket. The audible and visual alarm is located in the kitchen and the public area outside the kitchen. The audible and visual alarm is equipped with a remote signal receiver. The electromagnetic gas valve is installed on the gas pipeline, and the AC contactor is connected in series in the circuit of the electric heating equipment. The human body sensor, temperature sensor, electric cylinder, alarm light and temperature controller all establish a communication connection with the PLC controller. The wireless remote control establishes a wireless communication connection with the PLC controller. The audible and visual alarm, electromagnetic gas valve and AC contactor all establish a wireless communication connection with the remote signal receiver. The remote signal transmitter and remote signal receiver establish a wireless communication connection.

9. The online monitoring and fire prevention device for kitchen oil temperature according to claim 8, characterized in that, The control box is also equipped with an automatic indicator light and a remote control indicator light to display the current mode.

10. The online monitoring and fire prevention device for kitchen oil temperature according to claim 8, characterized in that, The temperature controller includes a display screen and buttons. The buttons are used to set the personnel departure delay time, process temperature range, and overheating temperature threshold. The display screen shows the real-time oil temperature and the set parameters.

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