An intelligent early warning and control system for fire-prone kitchen stoves in restaurants

Abstract

The present invention relates to an intelligent early warning and control system for a stove in the back kitchen of a restaurant, comprising an online monitoring / monitoring alarm device for a stove in the back kitchen, a transmission network and an online early warning and supervision platform; the online monitoring / monitoring alarm device for a stove in the back kitchen comprises a stove in the back kitchen alarm host and a stove in the back kitchen alarm module connected thereto, a multi-functional online temperature detector, a multi-technical stove in the back kitchen detector, a stove temperature display, a high-definition network camera, a voice alarm speaker, and an emergency linkage module. The present invention can accurately detect the cooking state of various stoves in the back kitchen of a restaurant online, the dynamics of the stove in the back kitchen, and the real-time temperature in the stove pot, and has the functions of timeout pre-alarm for the stove in the back kitchen, pre-alarm for the stove oil temperature being too high, video linkage alarm, and emergency linkage to cut off the gas source and power supply of the stove in the back kitchen, and can effectively prevent and automatically control the occurrence of safety accidents caused by the stove in the back kitchen of a restaurant from the source.

Description

Technical Field

[0001] The present invention belongs to the technical field of intelligent early warning, prevention and control and online supervision of fire safety hazards, and specifically relates to an online intelligent early warning and prevention system for fire in a restaurant kitchen stove based on the Internet of Things, the Internet and the mobile Internet. Background Art

[0002] With the rapid economic development and urbanization process in my country, the living standards and consumption capacity of urban and rural residents have been continuously improved, and the catering industry in my country has also developed rapidly. According to statistics, there are more than 5 million catering service outlets in China, and the national catering revenue exceeded 4 trillion yuan in 2018. Most of these catering service outlets are located in commercial areas, residential areas and other relatively prosperous places or places with large traffic, and most of the catering kitchens involve cooking with open fire. While providing people with delicious food, it is necessary to do a good job in fire safety prevention in the kitchen to prevent problems before they happen.

[0003] China's food culture has a long history and is profound and extensive. Chinese food has a variety of cooking methods such as frying, stir-frying, cooking, deep-frying, braising, stir-frying, and grilling. Most of them require oil and heat processing. Kitchen cooking equipment includes various gas (natural gas, artificial gas) stoves, electric heating (electromagnetic, electric heating) stoves and charcoal (charcoal, coal) stoves, etc. Most of these commercial stoves do not have automatic temperature control devices. During the cooking process, they should be well cared for and the fire should be kept alive and turned off when leaving.

[0004] In some catering establishments, due to the weak safety awareness and carelessness of some chefs, it is common for some kitchens to leave the stove area while ingredients are being heated. If the stove is left unattended for a long time, it can easily lead to kitchen fires caused by spontaneous combustion of excessive oil temperature or overflow of boiling oil, or fire safety accidents such as gas leaks and electrical fires caused by burning the pot dry or accidental flameout. This has become a major fire safety hazard in various catering service establishments.

[0005] There is usually a lot of grease accumulated in the exhaust hood of a restaurant kitchen. If the flame from a stove fire is drawn into the oil fume duct, it is likely to cause the oil fume duct to catch fire. The exhaust duct has many bends and the fire is generally not easy to extinguish, and the fire spreads very quickly. If the fire in the kitchen stove is not discovered in time or the remedial method is inappropriate, it is likely to cause a kitchen fire or even a serious major fire accident.

[0006] Large-scale catering service venues with a relatively concentrated catering industry, such as large commercial plazas, shopping malls, airports, stations, schools, and hospitals, have large building volumes, complex architectural characteristics, and large flow of people and population density. They are key fire-fighting units. If a fire occurs in a catering kitchen and causes a major fire, the consequences will be disastrous.

[0007] Currently, the existing automatic fire-fighting facilities in buildings are unable to extinguish fires in restaurant kitchen stoves. The existing commercial kitchen automatic fire-extinguishing devices on the market can extinguish stove fires under certain conditions, but most of these devices are mechanical linkage fire-extinguishing devices. If there is too much oil accumulation in the linkage valve, the linkage fails, the air pressure or fire extinguishing agent is insufficient, it is difficult for them to play a role at the critical moment.

[0008] Fire prevention is more important than fire fighting. Therefore, it is particularly important to innovatively invent an intelligent early warning and control system for unmanned kitchen stoves in the back of the restaurant. This system can proactively prevent and control the risk of kitchen fires caused by unmanned kitchen stoves in the back of the restaurant from the source, move the fire prevention threshold forward, comprehensively improve the kitchen safety factor level, and provide an advanced and efficient online supervision and management technical means for the safety management departments of various catering service management units, comprehensively improving the overall fire safety management level and comprehensive fire prevention and control capabilities of the units. Summary of the invention

[0009] In order to effectively and creatively solve the potential safety hazard problem of fire in the kitchen of a restaurant being kept away from people, and to provide an advanced and efficient online supervision technology means for each catering service management unit, the present invention provides an online intelligent early warning and control system for fire in the kitchen of a restaurant being kept away from people based on the Internet of Things, the Internet, and the mobile Internet. The system adopts advanced hot-fire cooking intelligent detection technology, array infrared online temperature measurement technology, human body induction intelligent sensing technology, video linkage alarm technology, system integration and intelligent control technology, logical intelligent calculation and analysis technology, and anti-interference processing technology, and combines advanced information technologies such as the Internet of Things, the Internet, and the mobile Internet. It can automatically and accurately detect the hot-fire cooking status of the catering kitchen stove, the dynamics of the hot-fire leaving the stove, and the real-time temperature in the stove pot online. It can use the Internet or mobile Internet to transmit various monitoring / surveillance data and alarm information from the front end to the online early warning and supervision platform. It has the functions of hot-fire leaving the stove timeout pre-alarm and stove oil temperature too high pre-alarm, on-site voice sound and light pre-alarm and PC client and mobile phone client alarm means, and has an emergency linkage control function. It can emergency cut off the gas source and power supply of the hot-fire cooking equipment when the on-site early warning warning is invalid. It can effectively prevent and automatically control the safety hazards of hot-fire leaving the stove in the catering kitchen from the source, effectively avoid the risk of safety liability accidents caused by the hot-fire leaving the stove and even the unit fire, and ensure the normal, orderly, safe, stable operation and sustainable development of catering service units.

[0010] The present invention is realized by the following technical scheme: a smart early warning and prevention system for the fire in the kitchen of a restaurant, including an online monitoring / supervision alarm device for the fire in the kitchen, a transmission network and an online early warning and supervision platform;

[0011] The online monitoring / monitoring alarm device for kitchen stoves with open flames or no one is present includes a kitchen stove alarm host and a fire monitoring module connected thereto, a multi-function online temperature detector, a multi-technology open flame or no one is present detector, a stove temperature display, a high-definition network camera, a voice alarm speaker, and an emergency linkage module; the kitchen stove alarm host transmits various monitoring / monitoring data and alarm information to an online early warning monitoring platform via a transmission network; it can automatically and accurately detect online the open flame cooking status, open flame or no one is present dynamics, and the real-time temperature in the stove pot of various catering back kitchen stoves, and has the functions of stove open flame or no one is present timeout pre-alarm, stove oil temperature too high pre-alarm, and emergency linkage to cut off the gas source and power supply of the open flame cooking equipment;

[0012] The transmission network supports Internet\4G network transmission methods, and can use Ethernet, local area network and 4G full network to transmit various monitoring / supervision data and alarm information to the online early warning and supervision platform; the 4G full network supports the three major operators of China Unicom, China Mobile and China Telecom.

[0013] The online early warning supervision platform includes a system server and a PC client and a mobile client. The PC client supports terminal devices such as desktop computers, notebooks, and iPads. The mobile client has two forms: a mobile APP and a WeChat public platform. The safety management department of the catering service management unit can use the PC client or the mobile client to supervise and handle the fire alarms of the stoves in the back kitchens of each networked catering unit and conduct online supervision and management. The safety person in charge of each catering unit can use the mobile client to receive and handle the fire alarms of the stoves in the back kitchens of the unit and make timely rectifications.

[0014] The kitchen stove fire and absence alarm host is installed on one side of the kitchen distribution box or other appropriate locations, and its power input terminal is connected to the AC220V main power supply in the distribution box. It includes a mainboard, a network module, an audible and visual alarm, a transformer, a battery and a mainframe body, wherein the mainboard has an RJ45 network port, a 4G full network module interface, a video intercom interface, a TF card slot, an AC power input port, a battery DC power input port, a DC power output terminal, an RS485 signal acquisition terminal, a siren / light output, a voice alarm output terminal and an emergency linkage output terminal; it can be connected to Ethernet / LAN and 4G wireless network, and can be connected to a fire monitoring module, a multi-function online temperature detector, a multi-technology fire and absence detector, a stove temperature display, a high-definition network camera, a video Terminal equipment such as intercom panel, voice alarm speaker, sound and light alarm, 4G full network access module and emergency linkage module; the network module includes an IP network switch and a 4G full network access module, the input port of the IP network switch is connected to an external Ethernet or LAN network device, and the output port is connected to the RJ45 network port of the kitchen stove fire alarm host, the 4G full network access module is inserted into the 4G full network access module interface of the kitchen stove fire alarm host, the antenna is installed on one side above the kitchen stove fire alarm host, and a special IoT card or China Unicom, China Mobile, Telecom traffic card; the TF card is installed in the TF card slot and can store video surveillance data for more than 1 month; the sound and light alarm is composed of an LED strobe light and a speaker, wherein the strobe light is installed on one side above the housing of the kitchen and stove fire alarm host, and its signal input end is connected to the alarm light output end of the kitchen and stove fire alarm host, and can warn with a warning light when an alarm occurs; the speaker is installed inside the kitchen and stove fire alarm host, and its signal input end is connected to the alarm signal output port of the kitchen and stove fire alarm host, and can warn with a special alarm sound when an alarm occurs; the transformer adopts 220V The 18V control transformer has its power input connected to the AC220V main power supply in the kitchen power distribution box, and its output connected to the AC power input port of the alarm host; the battery adopts a lead-acid maintenance-free battery, and its input is connected in series with the input power of the kitchen stove fire alarm host, and its output is connected to the battery DC power input of the kitchen stove fire alarm host, which can work continuously for more than 10 hours in the event of a power outage; the host box is made of high-quality steel plate stamping, and the box has locks, heat dissipation holes, working status signal LED indicators and alarm reset buttons. The kitchen stove fire alarm host has various monitoring / monitoring data acquisition, automatic analysis and processing, intelligent control, data storage and communication transmission functions, and can transmit various monitoring / monitoring data and alarm information to the online early warning monitoring platform through Ethernet\LAN\4G network, and supports breakpoint continuation, remote maintenance, fault detection, anti-disassembly alarm, power failure and network failure alarm and other functions.

[0015] The fire monitoring module is installed in the power distribution box of the hot cooking equipment in the back kitchen of the restaurant. Its power input terminal is connected to the DC power output terminal of the hot fire alarm host of the dining kitchen stove, its signal input terminal is connected to the neutral line and a live line of the main power switch of the cooking equipment (such as the blast gas stove, electromagnetic (heat) cooking equipment), and its signal output terminal is connected to the RS485 signal acquisition terminal of the hot fire alarm host of the dining kitchen stove. The hot fire monitoring module can automatically judge and intelligently identify the hot fire / off status of various blast gas stoves and electromagnetic (heat) cooking equipment by detecting the change of the working current (voltage) of the hot fire cooking equipment, and transmit the detection signal to the hot fire alarm host of the dining kitchen stove through the RS485 signal line.

[0016] The multifunctional online temperature detector is installed at an appropriate position on the ceiling or wall in front of the fire stove area in the back kitchen of the restaurant. Its power input terminal is connected to the DC power output terminal of the kitchen fire alarm host, and its signal output terminal is connected to the RS485 signal acquisition terminal of the kitchen fire alarm host. The multifunctional online temperature detector can intelligently judge and accurately identify the fire / fire status of various direct-fired gas stoves and charcoal stoves by measuring the temperature map changes in the stove area online, and can automatically and accurately measure the real-time temperature in the stove pot online, and transmit the fire detection signal and temperature monitoring data to the kitchen fire alarm host through the RS485 data line.

[0017] The multi-technique fire-prone and person-free intelligent detector is installed at an appropriate position on the ceiling or wall in front of the stove area in the restaurant kitchen fire operation room, and its power input end is connected in series with the power line of the multi-function temperature online detector, and its signal output end is connected in series with the signal output end of the multi-function temperature online detector and connected to the RS485 signal acquisition end of the restaurant kitchen stove fire-prone and person-free alarm host. The multi-technique fire-prone and person-free intelligent detector works synchronously with the multi-function temperature online detector, and can automatically detect and accurately determine whether there is an operator in the stove area during fire cooking in the restaurant kitchen, and transmit the human body detection signal to the restaurant kitchen stove fire-prone and person-free alarm host through the RS485 data line.

[0018] The stove temperature display is installed at a location convenient for monitoring on one side of the stove area in the hot-fire operation room of the restaurant kitchen, and its power input end is connected in series with the power line of the multifunctional online temperature detector, and its signal input end is connected with the signal output end of the multifunctional online temperature detector. The stove temperature display can display the highest real-time temperature of the monitored hot-fire stove area online.

[0019] The high-definition network camera is installed in the kitchen fire operation room to facilitate monitoring of the fire stove area. The power socket of its power adapter is connected to the AC220 power socket built into the kitchen stove fire alarm host, or connected to the AC220V main power supply in the kitchen distribution box, and the network port is connected to the IP network module output port built into the kitchen stove fire alarm host through a Category 5e network cable. The high-definition network camera can transmit video monitoring data to the online early warning supervision platform through Ethernet or local area network, and can automatically send a video linkage alarm to the online early warning supervision platform when the kitchen stove fire time or stove oil temperature reaches the alarm threshold set by the system after catering, and supports pre-alarm recording and alarm playback functions.

[0020] The voice alarm speaker is installed at the entrance of the hot work operation room in the catering kitchen or other appropriate locations, and its signal input end is connected to the voice alarm output end of the kitchen stove hot work and no-person alarm host. The voice alarm speaker can automatically issue a voice alarm to warn the chef to return to the operating position in time or reduce the heat to cool down when the hot work and no-person alarm time of the catering kitchen stove or the stove oil temperature reaches the warning and alarm threshold set by the system.

[0021] The emergency linkage module includes an intermediate relay and a shunt release; wherein the intermediate relay is installed in a position convenient for wiring in the distribution box of the kitchen hot-fire cooking equipment, the power input end of the intermediate relay is connected to the emergency linkage output end of the dining kitchen stove hot-fire leave alarm host, and its control signal output end is connected to the output end of the shunt release and connected to the positive and negative poles of the gas solenoid valve; the shunt release is installed on one side of the guide rail of the main power switch circuit breaker of the hot-fire cooking equipment in the distribution box of the catering kitchen, and its power input end is connected in series with the zero line and a live line of the main power switch of the hot-fire cooking equipment. The emergency linkage module can automatically cut off the gas source and power supply of the hot-fire cooking equipment in an emergency when the hot-fire leave time of the dining kitchen stove reaches the alarm threshold or the stove oil temperature reaches the alarm threshold and the alarm is invalid, so as to prevent the hot-fire stove from being left unattended for a long time or the stove oil temperature is too high, thereby causing kitchen safety production or stove fire accidents.

[0022] The system server includes a WEB application server, a database server, a streaming media server, an alarm receiving server, a video forwarding server, and an alarm forwarding server. Its basic configuration and technical parameters can be selected according to the number of terminal users of the connected networked monitoring catering units, and can be expanded and expanded as needed. The system server can be a rack server or a cloud server.

[0023] The PC client is installed in the fire control room or safety management office of the catering service management unit, and has the functions of online monitoring, video surveillance, alarm handling, data query, statistical analysis, assessment management, system management, user management, equipment management, etc. When the PC alarm client automatically alarms, a special alarm sound can be used to warn and an alarm window can be automatically popped up, which can display the name, location, operation room, alarm time, alarm content, on-site monitoring video, safety person in charge and contact number of the alarm catering unit kitchen, etc., so that the on-duty personnel of the catering service venue management department can receive the alarm in time and assign patrol personnel to supervise and handle it.

[0024] The mobile client has two forms, mobile APP and WeChat public platform, which can be installed and added to the mobile terminals of the safety management personnel of the catering service management unit and the safety person in charge of each catering unit. The mobile APP has the functions of online monitoring, video monitoring, alarm push, video intercom, data query, statistical analysis and assessment management. The mobile APP can push real-time alarm information to the safety person in charge of the catering unit. When the alarm is triggered, a special alarm sound can be used to warn and an alarm window can be automatically popped up. The name, location, operation room, alarm time, alarm content, on-site monitoring video and other information of the alarm catering kitchen can be displayed, so that the safety person in charge of the catering unit can receive the alarm and check the disposal in time. The WeChat public platform has functional modules such as alarm push, disposal feedback and information announcement. It can push real-time alarm information to the safety person in charge of the catering unit. The safety person in charge of the catering unit can feedback the alarm disposal and rectification situation to the catering service safety management department online. The catering service management department can publish various fire safety management regulations, notification information and catering unit violation disposal (penalty) announcements online about the catering kitchen through the WeChat public platform.

[0025] The system can establish a remote grid-based supervision platform through the Internet, which is convenient for large commercial real estate groups to conduct unified online centralized supervision of safety hazards of fire and absence in the back kitchens of catering shops in their commercial plazas and shopping centers, or for large catering chain groups to conduct unified online centralized supervision of safety hazards of fire and absence in the back kitchens of their catering outlets. Different management roles and permissions can be set according to different users, and multi-level supervision grids can be set to conduct online supervision and management according to the localized and grid-based supervision mechanism.

[0026] The system supports multiple standard communication protocols and can be seamlessly connected to the internal security, fire protection or OA systems of users such as large commercial real estate groups or catering chain groups. It can customize the development of related system functions and support SDK secondary development.

[0027] The system can be applied to large catering service places with relatively concentrated catering, such as large commercial plazas, shopping centers, airports, stations, schools, hospitals, government agencies, factories, etc., and can also be applied to various social catering in other places.

[0028] The present invention has the following beneficial effects: through the advanced and efficient online monitoring / monitoring, automatic pre-alarm and emergency linkage control and other technical means of the system, it can actively prevent and avoid the safety production or fire liability accidents such as oil pan fire, dry pot, accidental flameout, gas leakage, electrical fire, etc. caused by the kitchen fire, and comprehensively improve the kitchen safety factor level. Through the advanced online early warning supervision platform of this system, it can provide a high-efficiency supervision technical means for the safety management departments of various large-scale catering service management units and the safety persons in charge of each catering unit, and comprehensively improve the technical level of fire safety hidden danger supervision of the unit. Through the application of this system, it can effectively solve the shortcomings of the existing catering kitchen internal fire protection and security system without automatic detection, early warning and prevention and control of stove fire, effectively prevent and automatically control the fire safety hidden danger of the kitchen stove fire from the source, and comprehensively improve the fire safety concept and prevention awareness of the catering kitchen fire operator, comprehensively improve the overall fire safety management level and fire comprehensive prevention and control capabilities of the catering service management unit, and effectively guarantee the normal, orderly, safe and stable operation and sustainable development of the catering service unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 It is a schematic diagram of the system composition of the intelligent early warning and control system for the fire-prone and unattended cooking stove in the catering kitchen of the present invention;

[0031] Figure 2 This is a schematic diagram of the system principle of Embodiment 1 of the intelligent early warning and control system for a stove in a restaurant kitchen that is not occupied when it is on;

[0032] Figure 3 This is a schematic diagram of the system principle of Embodiment 2 of the intelligent early warning and control system for a stove in a restaurant kitchen that is not occupied when a fire is started;

[0033] Figure 4 This is a diagram of the equipment installation and wiring method of the intelligent early warning and control system for the fire-prone and unattended cooking stove in the catering kitchen of the present invention;

[0034] Figure 5 This is a diagram of the fire cooking monitoring method of the intelligent early warning and control system for the fire-prone and unattended cooking range in the catering kitchen of the present invention;

[0035] Figure 6 This is a diagram of the fire-prone and unmanned monitoring mode of the intelligent early warning and control system for the kitchen stove in the catering industry of the present invention;

[0036] Figure 7 This is a diagram of the stove oil temperature monitoring method of the smart early warning and control system for the restaurant kitchen stove with fire and no one is around in the kitchen;

[0037] Figure 8 This is a diagram of a method for early warning of a fire and a person leaving the stove in a catering kitchen according to the present invention;

[0038] Fig. 9 This is a diagram of the stove oil temperature pre-alarm method of the smart early warning and control system for the kitchen stove with fire and no one in the catering kitchen of the present invention;

[0039] Fig.10 A diagram of a video linkage alarm method of the intelligent early warning and control system for a fire-prone kitchen stove in a restaurant in the present invention;

[0040] Fig.11 This is a diagram of the emergency linkage control method of the intelligent early warning and control system for the fire-prone kitchen stove in the catering kitchen of the present invention;

[0041] Fig.12 This is a schematic diagram of the alarm receiving and handling process of the intelligent early warning and control system for fire in the kitchen of a restaurant when no one is around. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention. The structural, methodological or functional changes made by those of ordinary skill in the art based on these embodiments shall be included in the protection scope of the present invention.

[0043] Embodiment 1

[0044] like Figure 1As shown, the restaurant kitchen stove fire away smart early warning and prevention system includes online monitoring / monitoring alarm equipment for restaurant kitchen stoves, transmission network and online early warning supervision platform; wherein the online monitoring / monitoring alarm equipment for restaurant kitchen stoves is installed in the restaurant kitchen fire operation room that needs to be monitored online, mainly including fire monitoring module, multi-function temperature online detector, multi-technology fire away detector, stove temperature display, high-definition network camera, voice alarm speaker, emergency linkage module and restaurant kitchen stove fire away alarm host and other equipment, the transmission network supports Internet\4G network transmission mode; the online early warning supervision platform includes system server and PC client, mobile client (APP\WeChat). The system server can be deployed in the IT room of the system supplier or large group users such as large commercial real estate group, property management group, catering service management group, etc. The PC client can be installed in the fire control room or safety management office of the catering service management unit, and the mobile client can be installed and added to the mobile phone of the safety manager of the catering service management unit and the safety person in charge of each catering unit.

[0045] The principle of the intelligent early warning and control system for fire-prone and unattended stoves in the restaurant kitchen includes two types: blast gas stoves, electromagnetic (heat) stoves and direct-fired gas stoves and charcoal stoves.

[0046] like Figure 2 As shown, when the cooking equipment is a blast gas stove or an electromagnetic (heat) stove, the system principle of the blast gas stove or electromagnetic (heat) stove's fire-prone absence pre-alarm and automatic prevention and control is as follows: when the chef turns on the stove power supply of the blast gas stove or electromagnetic (heat) stove to cook with fire, the fire monitoring module of the system monitors the fire status of the stove by detecting the working current (voltage) of the stove blower or electromagnetic heating plate and electric heating tube, and the multi-technology fire-prone absence detector and the multi-functional temperature online detector automatically enter the online monitoring state. When the stove is left unattended for 60 seconds (adjustable) or the stove oil temperature reaches 220℃ (adjustable), the chef will be warned by voice, sound and light warning to return to the operating position in time to take care of it or reduce the fire to cool it down; if the chef returns to the operating position in time before the platform alarm threshold is reached, the warning will be automatically lifted; if the chef has not returned to the operating position within 30 seconds (adjustable) of the warning time or before the stove oil temperature reaches 260℃ (adjustable), the on-site voice, sound and light warning will automatically turn into an alarm; at the same time as the stove is left unattended for a timeout alarm or the stove oil temperature is too high for 10 seconds (adjustable), the system can automatically send an alarm to the PC client of the fire control room (or safety management office) of the catering service management unit and the mobile client of the safety person in charge of the catering unit through the Internet\4G network, and automatically connect the emergency linkage to cut off the gas and power supply of the stove to prevent the stove from being left unattended for a timeout or the stove oil temperature is too high, causing the risk of kitchen production safety or fire accidents.

[0047] The intelligent early warning and control system for the fire-prone stove in the restaurant kitchen is mainly used to prevent the safety hazard of the stove being operated when the stove is not operated. When there is someone operating or supervising the operation area of ​​the fire-prone stove, the system will not trigger an alarm.

[0048] When the chef turns off all the stoves that are monitored / surveilled in the stove area, the smart early warning and prevention system for stoves in the back kitchen of the catering restaurant automatically enters the standby state.

[0049] The smart early warning and control system for the fire-prone stove in the catering kitchen can automatically monitor online 24 hours a day. This operation mode can not only prevent the safety hazard of the kitchen being open during normal business hours, but also effectively prevent the safety hazard of fire caused by forgetting to turn off the fire after get off work. If the system detects that the stove is in a fire state after closing, it can automatically send an alarm to the PC client of the fire control room (or safety management office) of the catering service management unit and the mobile client of the person in charge of the catering unit's safety.

[0050] like Figure 4As shown in the figure, the equipment installation and wiring diagram of the intelligent early warning and control system for the fire-prone stove in the back kitchen of the catering unit: the online monitoring / surveillance alarm equipment for the fire-prone stove in the back kitchen of the catering unit is installed in the back kitchen operation room involving fire and oil-related hot processing, wherein the fire-prone stove alarm host is installed on one side of the fire-prone cooking equipment distribution box in the kitchen or other appropriate positions, and the AC220V permanent power supply is taken from the kitchen cooking equipment distribution cabinet, and automatic online monitoring / surveillance is carried out 24 hours a day; the high-definition network camera is installed in a position convenient for monitoring the kitchen fire stove operation area, and its power adapter is connected to the power supply It is connected in series with the input power supply of the kitchen and stove fire and occupancy alarm host; the multi-technology fire and occupancy detector is installed at an appropriate position on the ceiling or wall in front of the fire-operated stove, and its detector input power supply is connected to the DC12V power output terminal of the kitchen and stove fire and occupancy alarm host, and its signal output terminal is connected to the RS485 signal acquisition terminal of the kitchen and stove fire and occupancy alarm host; the multi-function stove temperature online detector is installed at an appropriate position on the ceiling or wall in front of the fire-operated stove, and its input power supply and signal output terminal are connected in series with the multi-technology fire and occupancy detector; the stove temperature display is installed It is installed at a position convenient for monitoring on one side of the kitchen stove where hot fire is operated, and its input power supply and signal output end are connected in series with the multifunctional online temperature detector; the voice alarm speaker is installed at the entrance of the operation room or other appropriate positions in the kitchen, and its signal input end is connected to the alarm output port 1 of the kitchen stove hot fire and absence alarm host; the hot fire monitoring module is installed in a position convenient for installation and wiring in the distribution box of the kitchen hot fire cooking equipment, and its input power supply and signal output end are connected in series with the multifunctional hot fire and absence detector, and the signal input end is connected to the neutral line and a live line of the main power switch of the hot fire cooking equipment in the distribution box; The intermediate relay of the emergency linkage module is installed in the distribution box of the kitchen hot-fire cooking equipment at a position convenient for installation and wiring. Its input end is connected to the emergency linkage output end of the dining and kitchen stove hot-fire absence alarm host, and the output end is connected to the positive and negative plates of the kitchen gas electric valve, and is connected to the input end of the shunt release; the shunt release of the emergency linkage module is installed on the guide rail side of the main power switch circuit breaker of the hot-fire cooking equipment in the kitchen distribution box, and its input power is connected in series with the neutral line and a live line of the main power switch circuit breaker of the hot-fire cooking equipment, and the input end is connected to the output end of the intermediate relay of the emergency linkage module.

[0051] Specifically, the kitchen stove fire and absence alarm host is wall-mounted, and one is installed in the back kitchen of each catering unit; the high-definition network camera mainly monitors the fire operation area, and can be installed on the ceiling or wall (the wall-mounted type requires the installation of a monitoring bracket). The specific number of installations should depend on the size of the kitchen space and the number of operation rooms, and there should be no monitoring blind spots; the multi-technology fire and absence detector mainly monitors the fire operation area, and can be installed on the ceiling or wall (a bracket with adjustable height and angle needs to be installed), 2 to 3.5 meters away from the stove, and the installation height is 2 to 2.5 meters from the ground. The detection angle is adjusted to ∠45° to 60°, and one is installed every 7 to 8 meters of the stove operation area, and there should be no detection blind spots; the multi-function stove temperature online detector mainly The monitoring area is the area of ​​the hot fire stove. It can be installed on the ceiling or on the wall (a bracket with adjustable height and angle needs to be installed). It is 1 to 2.5 meters away from the stove and the installation height is 2 to 2.5 meters from the ground. The detection angle is adjusted to ∠50° to 70°. One is installed every 3 to 5 meters of the stove area, and there must be no detection blind spots. The stove temperature display is wall-mounted, with one installed in each hot fire stove area unit; the hot fire monitoring module is wall-mounted, with one installed in each hot fire operation room; the intermediate relay of the emergency linkage module is wall-mounted, with one installed on the main power switch of the cooking equipment in each hot fire operation room; the shunt release of the emergency linkage module is installed on a rail, with one installed on the main power switch of the cooking equipment in each hot fire operation room.

[0052] like Figure 5 As shown, the fire cooking monitoring method of the intelligent early warning and control system for the restaurant kitchen stove includes two types: blast gas stove, electromagnetic (heat) stove and direct-fired gas stove and charcoal stove. The fire monitoring method of the blast gas stove and electric (heat) stove is as follows: when the chef turns on or off the stove power of the blast gas stove or electric stove magnetic (heat) cooking equipment, the fire cooking monitoring module of the system can automatically judge and accurately identify the fire / fire off state of the stove according to the working current (voltage) change of the cooking equipment, and transmit the detection signal to the fire alarm host of the dining kitchen stove through the RS485 signal line.

[0053] If the blast gas stove, electromagnetic (heat) stove, direct-burning gas stove and charcoal stove are in the same operating stove area, the system can make intelligent logical judgments and accurately identify the fire-on / fire-off status of various stoves. Within the stove area monitored by the multi-functional temperature online detector, as long as any type of stove is in the fire, the system can automatically detect and identify it as the fire-on state. After all the fire-on stoves are turned off, the system automatically determines that they are in the fire-off state.

[0054] The system adopts advanced equipment current (voltage) detection and current (voltage) signal automatic conversion and processing technology. It can intelligently judge and accurately identify the fire-on / fire-off status of various blast-type gas stoves and electromagnetic (heat) cooking equipment by detecting the working current (voltage) of the stove blower or electromagnetic heating plate and electric heating tube. It has fast response speed and accurate judgment, and is not affected by the high temperature of the open flame of the blast-type gas stove and the residual heat of the furnace after the stove is turned off. It is suitable for online automatic monitoring of the fire-on / fire-off status of various blast-type gas Chinese cooking stoves, large pot stoves, low soup stoves and various commercial electromagnetic (heat) Chinese cooking stoves, large pot stoves, low soup stoves and various electric fryers, electric griddles, electric ovens and other cooking equipment in the back kitchen.

[0055] The system adopts advanced array infrared online temperature measurement technology and logical intelligent calculation technology. It can intelligently judge and accurately identify the fire-on / fire-off status of various direct-fired gas stoves and charcoal stoves by online measuring the temperature map changes in the stove area. It has fast recognition speed and accurate judgment, and is not disturbed and affected by environmental factors such as temperature and humidity, oil smoke, steam, and electromagnetic in the back kitchen. It is suitable for online automatic monitoring of the fire-on / fire-off status of various Chinese and Western direct-fired cooking stoves, clay pot stoves, low soup stoves, cooking stoves, barbecue stoves and various charcoal stoves.

[0056] The multifunctional online temperature detector has the functions of intelligent fire detection and online detection of stove temperature of direct-fired gas stoves and charcoal stoves. Within the same stove monitoring area, when the blast gas stove or electromagnetic (heat) cooking equipment is turned on, the multifunctional online temperature detector will enter the stove temperature online monitoring program. When the blast gas stove or electromagnetic (heat) cooking equipment is turned off, the multifunctional online temperature detector will automatically enter the direct-fired gas stove and charcoal stove fire detection and stove temperature synchronous monitoring program.

[0057] like Figure 6 As shown, the fire-active occupant monitoring method of the intelligent early warning and control system for restaurant back kitchen stoves is as follows: when the fire monitoring module or the multi-functional stove temperature detector detects the fire cooking signal in the monitoring stove area, the multi-technology fire-active occupant detector can automatically detect and intelligently determine whether there is an operator in the fire operation area, and transmit the human body detection signal to the restaurant kitchen stove fire-active occupant alarm host through the RS485 data line.

[0058] The multi-technology fire and person detector adopts internationally leading human body sensing intelligent sensing technology, intelligent logic analysis technology and anti-interference processing technology, and adopts high-performance multi-infrared sensors and ultra-wide spectrum radar wave detectors (integrated design). It can automatically and accurately detect online whether there is a chef operating or tending the stove area when cooking in the back kitchen. It has a wide detection range (detection angle can reach ∠160°, radius can reach 4 to 5m), high sensitivity (can detect small movements of human limbs), stable performance, reliable and durable, and is not interfered with or affected by environmental factors such as kitchen temperature and humidity, light source, heat source, oil smoke, steam, noise, electromagnetism, moving objects, air convection, etc.

[0059] The fire monitoring module, the multi-functional stove temperature detector and the multi-technology fire and occupancy detector are simultaneously online automatic detection, and transmit the monitoring data to the kitchen stove fire and occupancy alarm host through the RS485 signal line. The kitchen stove fire and occupancy alarm host can monitor whether there is a fire and occupancy in the stove operation area based on intelligent analysis and processing of the monitoring data and logical judgment.

[0060] The smart early warning and prevention system for fire-prone stoves in the back kitchen of a restaurant is mainly used to prevent the safety hazard of people leaving the fire-prone stove operation area in the back kitchen of a restaurant. The main detection area of ​​the multi-technology fire-prone detector is the stove fire-prone operation area, not the entire fire-prone operation room. This method can prevent kitchen fire accidents caused by unattended fire stoves when there are people in the fire-prone operation room but no one in the fire-prone operation area of ​​the stove (such accidents have occurred in many kitchens of catering units and are common).

[0061] like Figure 7 As shown, the stove oil temperature monitoring method of the smart early warning and control system for restaurant back kitchen stoves with open flames and away from people is: the multifunctional temperature online detector can automatically detect the temperature infrared spectrum of the open flame stove range online, automatically measure and calculate the real-time temperature of each temperature measuring point in the open flame stove range, and transmit the temperature monitoring data to the restaurant kitchen stove open flame and away from people alarm host through the RS485 data line.

[0062] The multifunctional online temperature detector adopts the internationally leading array-type infrared online temperature measurement technology, infrared attenuation automatic correction technology and logical intelligent calculation technology, and uses imported temperature sensor probes and intelligent chips. It can automatically measure the temperature infrared spectrum of the hot stove online. It has a large detection range (X-axis detection angle can reach ∠100°), a wide temperature measurement range (-40℃~500℃), many temperature measurement points (192), high detection accuracy (accuracy ±5℃), fast response speed (0.5s), stable performance, reliable and durable, and is not interfered and affected by kitchen stove fumes and electromagnetic waves from induction cookers.

[0063] The kitchen stove fire alarm host can automatically and accurately calculate the average temperature and maximum temperature of the fire stove range according to the temperature monitoring data of the multi-functional temperature online detector, and display the temperature on the stove temperature display through the RS485 data line.

[0064] like Figure 8 As shown, the pre-alarm method of the fire-prone stove-away intelligent early warning and control system for the restaurant back kitchen: the system is provided with the delayed warning of the fire-prone stove-away and the overtime alarm function of the fire-prone stove-away. When the system detects that the fire-prone stove-away is 60 seconds (adjustable), it can automatically issue an on-site voice, sound and light warning to alert the chef to return to the fire operation post in time to operate or take care of it. If the chef returns to the fire operation post in time within the warning time, the warning will be automatically lifted; when the on-site warning is 30 seconds (adjustable), that is, the chef has not returned to the operation post when the fire-prone stove-away reaches 90 seconds (adjustable), the system will automatically convert the voice, sound and light warning into an alarm, and automatically send an alarm to the PC client of the fire control room (or safety management office) of the catering service management unit and the mobile client of the safety person in charge of the catering unit through the Internet\4G network.

[0065] The reason why the intelligent early warning and control system for fire-starting and unattended stoves in the catering kitchen is set with a delayed warning time is mainly due to the consideration that during the actual cooking process, the chef may briefly leave the workbench to get ingredients, seasonings, etc. The delayed warning time is set to 60 seconds (adjustable). Without affecting the normal operation of the chef, the chef can be warned in time to return to the operating post in time, thereby achieving the purpose of safety control.

[0066] If the chef returns to the hot work operation position in time within the on-site warning time, the warning can be automatically lifted and no alarm will be sent to the online warning supervision platform. This method does not affect the normal cooking and processing operations of the chef, and can reserve some time for the chef to leave and return to his post, which can reasonably reduce the frequency of alarms to the warning supervision platform and the workload of the safety management personnel in receiving and handling alarms.

[0067] When the PC client of the fire control room (or safety management office) of the catering service management unit and the mobile client of the catering unit safety manager sound an alarm, a special alarm sound can be used first and an alarm page can be popped up automatically, which can display the name, location, operation room, alarm time, alarm content, on-site video, safety manager and contact number of the alarming catering unit, etc., so as to facilitate the front-line safety supervisors of the affiliated units to receive the alarm and check it in time and supervise and deal with it in time.

[0068] Specifically, the delayed warning time of the stove fire and absence of personnel in the system can be set on the multifunctional fire and absence of personnel detector through a handheld remote control. If the monitored fire area is an area involving oil operations such as frying, stir-frying, cooking, and deep-frying, the on-site delayed warning time should generally not be less than 60 seconds, nor more than 120 seconds. If the monitored fire area is an area with a long cooking time such as steaming, boiling, and stewing (such as a steaming and cooking area), the on-site delayed warning time can be appropriately set to be longer, but generally should not exceed 20 minutes. If the time is too short, the on-site alarm rate will be higher, and if the time is too long, it may lose a certain safety protection effect.

[0069] Specifically, the time for the stove fire and no-personnel timeout alarm of the system can be set and adjusted by connecting the stove fire and no-personnel alarm host with a laptop computer. The time from warning to alarm should generally not be less than 30 seconds, nor should it be more than 60 seconds. If the time is too short, the platform alarm rate will be high, and if the time is too long, it may lose a certain safety protection function.

[0070] like Fig. 9 As shown, the stove oil temperature pre-alarm method of the catering kitchen stove fire-promoting intelligent early warning and control system: the catering kitchen stove fire-promoting intelligent early warning and control system is equipped with high oil temperature warning and excessive oil temperature alarm functions. When the system detects that the maximum temperature of the stove reaches 200℃ (adjustable) or above after no one is in the stove fire operation area, it can automatically issue a voice sound and light warning on the spot to warn the chef to return to the operation post in time to reduce the fire and cool down. If the chef returns to the operation post in time before the platform alarm, the warning will be automatically lifted; when the maximum temperature of the stove reaches 260℃ (adjustable) or above, the system will automatically convert the voice sound and light warning into an alarm. After 10 seconds of the on-site alarm, if the chef has not returned to the operation post, the system will automatically send an alarm to the PC client of the fire control room (or safety management office) of the catering service management unit and the mobile client of the person in charge of safety of the catering unit through the Internet\4G network.

[0071] The boiling point of commonly used cooking oil is generally around 180°C, and the ignition point is generally around 340°C. Taking into full consideration the chef's normal cooking needs and safety control requirements, the system sets the stove oil temperature high warning threshold to 220°C (adjustable), and the stove oil temperature ultra-high alarm threshold to 260°C (adjustable). This will not affect the chef's normal cooking operations, but can also promptly warn the chef to reduce the heat and cool down in time, thereby achieving the purpose of safety control.

[0072] When the maximum temperature of the stove reaches 260℃ (adjustable) or above when there is no one in the stove fire operation area, an on-site voice, sound and light alarm is triggered, and a 10-second (adjustable) delay is set to alarm to the online early warning and supervision platform and automatically cut off the gas and power supply of the stove. This is to prevent the chef from leaving the stove and immediately alarming and cutting off the gas and power supply when the temperature is too high, affecting normal operation, and to give the chef some time to return to the operating post and adjust the firepower.

[0073] If the chef returns to the hot work position in time before reaching the platform alarm threshold, the warning can be automatically lifted and no alarm will be sent to the online warning supervision platform. This method does not affect the normal cooking and processing operations of the chef, and can give the chef some time to adjust the firepower after leaving the post and returning to the post, which can reasonably reduce the alarm frequency to the warning supervision platform and the workload of the safety management personnel in receiving and handling the alarms.

[0074] When the PC client of the fire control room (or safety management office) of the catering service management unit and the mobile client of the catering unit safety manager sound an alarm, a special alarm sound can be used first and an alarm page can be popped up automatically, which can display the name, location, operation room, alarm time, alarm content, alarm temperature, on-site video, safety manager and contact number of the alarming catering unit, so as to facilitate the front-line safety supervisors of the affiliated units to receive the alarm and check it in time and supervise and deal with it in time.

[0075] Specifically, the temperature warning threshold and alarm threshold of the stove with fire and no one away and the delay time of alarming to the platform of the system can be set by connecting the kitchen stove with fire and no one away alarm host computer using a laptop computer. Generally, the warning threshold should not be lower than 220℃, nor higher than 240℃, the on-site alarm threshold should not be lower than 260℃, nor higher than 280℃, the delay time of alarming to the platform and cutting off the gas and power supply of the stove should not be lower than 5 seconds, nor higher than 10 seconds. If the warning threshold is set too low, the on-site alarm rate will be high. If the alarm threshold is set too high or the delay time of alarming to the platform and cutting off the gas and power supply of the stove is too long, certain safety protection functions may be lost.

[0076] The intelligent early warning and control system for the stove in the catering kitchen can automatically perform time keeping on and monitor the oil temperature of the stove at the same time after the stove is left unattended. The warning or alarm will be issued first, whichever of the time when the stove was left unattended or the stove oil temperature reaches the warning or alarm threshold first. This pre-alarm method can effectively prevent the risk of the oil pan catching fire due to the stove oil pan temperature being too high before the delayed warning time when the kitchen stove is left unattended.

[0077] like Fig.10As shown, the video linkage alarm method of the smart early warning and control system for restaurant kitchen stoves on fire and away from staff: when the time when the stove is on fire and away from staff or the stove temperature reaches the alarm threshold, the system can automatically send a video linkage alarm to the online early warning and supervision platform through the Internet\4G network, and the fire control room (or safety management office) of the catering service management unit can view the on-site monitoring video of the alarm kitchen through the PC client, and the safety person in charge of the catering unit can view the on-site monitoring video of the alarm kitchen through the mobile client in time. While notifying relevant personnel to deal with it in time, the dynamic return of the chefs who have been away from their posts can be remotely and dynamically monitored, which greatly improves the remote monitoring capability of the scene of fire and away from staff in the restaurant kitchen and the alarm judgment and disposal timeliness.

[0078] The video surveillance is 24-hour online monitoring. The monitoring video can be automatically stored in the TF card built into the kitchen stove fire and absence alarm host, and can be retrieved and queried through the background of the online early warning supervision platform, which is convenient for illegal evidence collection and subsequent tracing.

[0079] The online early warning and supervision platform supports the platform's pre-alarm video pre-recording and alarm video playback functions, supports pre-recording 30 seconds of video before alarm, supports automatic alarm recording and alarm playback functions, and the pre-recorded alarm video and alarm playback can be queried and downloaded online to improve the efficiency of querying historical records of fire alarms in the restaurant kitchen and collecting evidence of violations.

[0080] The high-definition network camera of the system can also be used as a regular remote video monitoring tool. The safety management personnel of the catering service management unit can use the PC client or mobile client to patrol online the back kitchens of each networked catering unit to see if there are other violations such as violations of food safety or fire safety management regulations. The safety person in charge of the catering unit can use the mobile client to patrol online the back kitchen staff to see if there are any violations of food safety, fire safety management regulations and violations such as stealing.

[0081] like Fig.11 As shown, the emergency linkage control method of the smart early warning and prevention system for the stove in the back kitchen of a restaurant is as follows: when the timeout warning of the stove being lit and the person being left alone or the on-site alarm of the stove oil temperature being too high after the stove is lit and the person being left alone is invalid, the system can automatically cut off the gas and power supply of the hot cooking equipment through emergency linkage while sending an alarm to the online early warning and supervision platform, so as to proactively prevent the hot stove from being left unattended for a long time or the oil temperature of the stove from being too high, which may cause kitchen production safety or stove fire accidents.

[0082] Specifically, when the stove is on and the owner has left the stove unattended for a timeout, the gas and power supply to the hot cooking equipment can be immediately cut off as an emergency; when the stove is on and the owner has left the stove unattended and the oil temperature is too high, if the chef has not returned to the operating post to reduce the fire within 10 seconds of the on-site alarm, the gas and power supply to the hot cooking equipment will be automatically cut off as an emergency, and a 10-second delay will be added. This is to prevent the chef from leaving the stove and immediately alarming and cutting off the gas and power as the temperature is too high, affecting normal operation; and to give the chef some time to return to the operating post and adjust the fire.

[0083] Specifically, when the timeout warning of the stove being on and no one is around or the on-site alarm of the stove oil temperature being too high after the stove is on and no one is around is ineffective, the kitchen stove being on and no one is around alarm host can emergency cut off the power supply of the gas electric valve through the linked intermediate relay, and can emergency cut off the main power switch power supply of the hot cooking equipment through the shunt release linked to the intermediate relay.

[0084] like Fig.12 As shown, the alarm receiving and handling process of the smart early warning and control system for fire-prone stoves in the back kitchen of a catering company is as follows: after the on-duty personnel of the safety management department of the catering service management unit uses the PC client to receive the alarm information of the timeout of the fire-prone stove in the back kitchen of a catering company or the excessive oil temperature, they can immediately assign fire patrol personnel to the back kitchen of the alarming catering company to supervise and handle the matter. After the PC-side supervision platform collects evidence of violations and the fire patrol personnel conduct on-site supervision, if the alarm is true, the catering company that violates the regulations will be punished as a warning in accordance with the regulations of the catering service management unit. After the person in charge of safety of the catering company receives the alarm information of the timeout of the fire-prone stove or the excessive oil temperature in the back kitchen of the company using the mobile client, he can immediately instruct the kitchen staff to return to the stove in time to operate or take care of it, and warn or punish the illegal operator in accordance with the regulations of the company.

[0085] Specifically, the safety management department of the catering service management unit may be the fire control room or safety management office of the catering service venue; the safety person in charge of the catering unit may be the manager or chef of the catering unit.

[0086] The kitchen stove fire away alarm host is provided with an alarm reset button. When the kitchen fire away time or the stove temperature reaches the platform alarm threshold, the kitchen stove fire away alarm will emergency linkage cut off the gas source or power supply of the fire stove, and the voice sound and light alarm will continue to alarm. The off-duty chef or other kitchen staff needs to manually press the alarm reset button on the kitchen stove fire away alarm host for 3 to 4 seconds to cancel the alarm.

[0087] Furthermore, the online early warning and supervision platform can automatically monitor and record the time when the alarm is manually cleared in the catering kitchen and the maximum temperature of the stove when the alarm is cleared, so as to facilitate remote supervision and management and assessment management.

[0088] Furthermore, the kitchen stove fire and absence alarm host can also expand the visual intercom function, and an intercom panel can be installed at a convenient location in the monitored kitchen, and its signal input end is connected to the intercom panel port of the kitchen stove fire and absence alarm host. When the online early warning supervision platform alarms, the on-duty personnel of the safety management department of the catering service management unit can use the PC client or mobile client, and the catering unit safety manager can use the mobile client to speak to the alarm kitchen. After the chef who is off duty in the alarm kitchen returns to his post, he can use the intercom panel to call back and confirm, so that the relevant safety supervision personnel can warn and urge the alarm kitchen or confirm that the chef who is off duty has returned to the fire operation post.

[0089] Furthermore, the safety management department of the catering service management unit can notify the illegal catering units of their violations through the WeChat public platform of the system.

[0090] Embodiment 2

[0091] like Figure 3 As shown, when the cooking equipment is a blast gas stove or an electromagnetic (heat) stove, the system principle of the pre-alarm and automatic prevention and control of the direct-fired gas stove and the charcoal stove is as follows: when the chef turns on the direct-fired gas stove or the charcoal stove for hot cooking, the system's multifunctional online temperature detector detects the hot state of the stove by intelligently analyzing the changes in the temperature map of the stove area, and the multi-technology hot and cold detector and the multifunctional online temperature detector automatically enter the online monitoring state. When the stove is left unattended for 60 seconds (adjustable) or the stove oil temperature reaches 200℃ (adjustable), the chef will be warned by voice, sound and light warning to return to the operating position in time to take care of it or reduce the fire to cool it down; if the chef returns to the operating position in time before the platform alarm threshold is reached, the warning will be automatically lifted; if the chef has not returned to the operating position within 30 seconds (adjustable) of the warning time or before the stove oil temperature reaches 260℃ (adjustable), the on-site voice, sound and light warning will automatically turn into an alarm; at the same time as the stove is left unattended for a timeout alarm or the stove oil temperature is too high for 10 seconds (adjustable), the system can automatically alarm the PC client of the fire control room (or safety management office) of the catering service management unit and the mobile client of the safety person in charge of the catering unit through the Internet\4G network, and automatically cut off the gas and power supply of the stove when it is in operation, so as to prevent the stove from being left unattended for a timeout or the stove oil temperature is too high, causing the danger of kitchen production safety or fire accidents. The fire monitoring method of the direct-fired gas stove and charcoal stove is as follows: when the chef ignites or turns off the direct-fired gas stove or charcoal stove, the multifunctional online temperature detector of the system can automatically judge and accurately identify the fire / fire-off state of the stove according to the temperature map change of the stove area, and transmit the detection signal to the kitchen stove fire alarm host through the RS485 data line. The other parts are the same as the first embodiment.

Claims

1. A smart early warning and control system for fire in the kitchen of a restaurant, characterized by: It includes online monitoring / monitoring alarm equipment for kitchen stoves with fire and absence of personnel, a transmission network and an online early warning supervision platform; the online monitoring / monitoring alarm equipment for kitchen stoves with fire and absence of personnel includes a kitchen stoves with fire and absence of personnel alarm host and a fire monitoring module connected thereto, a multi-functional online temperature detector, a multi-technical fire and absence of personnel detector, a stove temperature display, a high-definition network camera, a voice alarm speaker, and an emergency linkage module; the kitchen stoves with fire and absence of personnel alarm host transmits various monitoring / monitoring data and alarm information to the online early warning monitoring platform through the transmission network; The transmission network supports Internet\4G network transmission mode; the online early warning supervision platform includes a system server and a PC client and a mobile client; The hot-fire monitoring module detects the working current / voltage changes of hot-fire cooking equipment, automatically determines and intelligently identifies the hot-fire / off status of various blast-type gas stoves and electromagnetic / heat cooking equipment; The multifunctional online temperature detector can intelligently judge and identify the fire-on / fire-off status of various direct-fired gas stoves and charcoal stoves by measuring the temperature map changes of the stove area online, and measure the real-time temperature in the stove pot online; The multi-technology open-fire and open-person detector works synchronously with the multi-functional online temperature detector to automatically detect and determine whether there is an operator in the stove area when cooking in the back kitchen of a restaurant; The high-definition network camera is used to transmit video monitoring data to the online early warning supervision platform via Ethernet or local area network, and can automatically send a video linkage alarm to the online early warning supervision platform when the time when the kitchen stove is on or the oil temperature of the stove reaches the alarm threshold set by the system, and supports pre-alarm recording and alarm playback functions; The voice alarm speaker is used to automatically send out a voice alarm to warn the chef to return to the operating position in time or reduce the heat to cool down when the cooking stove is turned on and the cooking oil temperature reaches the warning and alarm threshold set by the system; The emergency linkage module automatically cuts off the gas and power supply of the cooking equipment when the time when the stove in the kitchen after dining reaches the alarm threshold or the oil temperature of the stove reaches the alarm threshold and the alarm is invalid.

2. The intelligent early warning and control system for fire in the kitchen of a restaurant according to claim 1 is characterized by: The kitchen and stove fire and absence alarm host comprises a mainboard, a network module, a battery and a mainboard housing, wherein the mainboard has an RJ45 network port, a 4G full network access module interface, an AC power input port, a battery DC power input port, a DC power output terminal, an RS485 signal acquisition terminal, a voice alarm output terminal and an emergency linkage output terminal; the network module comprises an IP network switch and a 4G full network access module, the input port of the IP network switch is connected to an external Ethernet or LAN network device, the output port is connected to the RJ45 network port of the kitchen and stove fire and absence alarm host, and the 4G full network access module is inserted into the 4G full network access module interface of the kitchen and stove fire and absence alarm host.

3. The intelligent early warning and control system for fire in the kitchen of a restaurant according to claim 2 is characterized by: The fire monitoring module has a power input end connected to the DC power output end of the kitchen stove fire and absence alarm host, a signal input end connected to the neutral wire and a live wire of the main power switch of the cooking equipment, and a signal output end connected to the RS485 signal acquisition end of the kitchen stove fire and absence alarm host.

4. The intelligent early warning and control system for fire in the kitchen of a restaurant according to claim 2 is characterized by: The multifunctional online temperature detector has a power input end connected to the DC power output end of the kitchen stove fire and occupancy alarm host, and a signal output end connected to the RS485 signal acquisition end of the kitchen stove fire and occupancy alarm host.

5. The intelligent early warning and control system for fire in the kitchen after catering according to claim 2 or 4 is characterized in that: The multi-technology fire and occupant detector has its power input end connected in series with the power line of the multi-functional online temperature detector, and its signal output end is connected in series with the signal output end of the multi-functional online temperature detector and connected to the RS485 signal acquisition end of the kitchen stove fire and occupant alarm host.

6. The intelligent early warning and control system for fire in the kitchen of a restaurant according to claim 4 is characterized by: The stove temperature display has a power input end connected in series with a power line of the multifunctional online temperature detector, and a signal input end connected with a signal output end of the multifunctional online temperature detector.

7. The intelligent early warning and control system for fire in the kitchen of a restaurant according to claim 2 is characterized by: The power socket of the power adapter of the high-definition network camera is connected to the AC220 power socket built into the kitchen and stove fire and absence alarm host, or is connected to the AC220V main power supply in the kitchen distribution box, and the network port is connected to the output port of the IP network module built into the kitchen and stove fire and absence alarm host via a Category 5e network cable.

8. The intelligent early warning and control system for fire in the kitchen of a restaurant according to claim 2 is characterized by: The signal input end of the voice alarm speaker is connected to the voice alarm output end of the kitchen stove fire and absence alarm host.

9. The intelligent early warning and control system for fire in the kitchen of a restaurant according to claim 1 is characterized by: The emergency linkage module includes an intermediate relay and a shunt release; wherein the power input end of the intermediate relay is connected to the emergency linkage output end of the kitchen stove fire and occupancy alarm host, and its control signal output end is connected to the output end of the shunt release and connected to the positive and negative poles of the gas solenoid valve; the shunt release is installed on one side of the guide rail of the main power switch circuit breaker of the hot fire cooking equipment in the catering kitchen distribution box, and its power input end is connected in series with the neutral line and a live line of the main power switch of the hot fire cooking equipment.

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