Intelligent fume exhaust system for commercial stores

Abstract

This invention relates to F24C15 / 20, specifically to an intelligent kitchen exhaust system for shops. It includes an exhaust control switch, a main controller, a data collector, a shop temperature sensor, an electric regulating valve, an electric regulating valve for the fan, a fan unit, and a power supply. The intelligent kitchen exhaust system provided by this invention can intelligently allocate the supply and exhaust air volume in real time, continuously optimize power consumption to achieve the lowest possible energy output, offering high flexibility and energy efficiency. It ensures long-term reliable and stable operation, ultimately achieving a truly intelligent energy-saving solution that meets the diverse needs of different business formats, helps operators achieve precise data control, easy management, and improves management efficiency.

Description

Technical Field

[0001] This invention relates to F24C15 / 20, and more specifically to an intelligent exhaust system for shops. Background Technology

[0002] In recent years, with the rapid development of my country's social economy, the service industry has accounted for an increasingly larger share of the economy. Among them, the catering industry has become an important sector in commercial complexes. Compared with other commercial sectors, catering requires more and more complex electromechanical systems. Therefore, the purification and emission of cooking fumes has become an important part of electromechanical design, especially in commercial areas where the variability and uncertainty of leasing places higher demands on the design of fume extraction systems.

[0003] Patent CN202011135816.7 provides an intelligent control system and method for exhausting cooking fumes. The system obtained through temperature sensors, unprocessed devices, etc. is practical, reliable, and easy to use, but it is only suitable for household exhaust and not for commercial areas where multiple shops use it at the same time.

[0004] Patent CN201710439820.4 provides a low-cost fume control system and method for commercial kitchens. Based on the number of fume hoods open, it automatically adjusts the exhaust volume of the exhaust fan and the make-up air volume of the make-up air fan, achieving interlocked frequency conversion control of the exhaust fan and make-up air fan, significantly reducing costs and achieving excellent energy-saving and environmental protection effects. However, when multiple shops use it simultaneously, the fume hoods open and close frequently, failing to effectively exhaust fumes according to actual conditions, indicating a low level of intelligence.

[0005] Commercial areas have high environmental requirements. Poor quality exhaust systems will result in fumes and odors on the floors, lowering the commercial level and having adverse effects on the surrounding environment and human health. Summary of the Invention

[0006] To address the aforementioned technical problems, the first aspect of this invention provides an intelligent kitchen exhaust system for shops, comprising an exhaust control switch, a main controller, a data collector, a shop temperature sensor, a shop electric regulating valve, a fan electric regulating valve, a fan unit, and a power supply.

[0007] The exhaust control switch is used to control the opening and closing of the shop's exhaust system.

[0008] Preferably, the exhaust control switch includes a shop current sensor and / or a shop exhaust control switch.

[0009] Preferably, the fume exhaust control switch includes a BA control module.

[0010] Preferably, the number of exhaust fume control switches is 1 ≤ exhaust fume control switches ≤ 30.

[0011] Preferably, the number of shop current sensors is 1 ≤ shop current sensors ≤ 30.

[0012] Preferably, the number of shop exhaust control switches is 1 ≤ Shop exhaust control switches ≤ 30.

[0013] Preferably, the total number of shop current sensors and shop exhaust fume control switches is 2 ≤ 30.

[0014] The shop temperature sensor is used to collect shop temperature data and transmit it to the main control unit. The data from the shop temperature sensor is used to determine whether the shop is in operation or just in normal ventilation mode.

[0015] Preferably, the shop temperature sensor includes a BA control module.

[0016] Preferably, the number of shop temperature sensors is 1 ≤ Shop temperature sensors ≤ 30.

[0017] The main control unit is used to receive, store, and calculate various data, and control the operation of the entire fume extraction system.

[0018] Preferably, the main controller has a built-in core chip or BA control module.

[0019] Preferably, the main control unit is a touch screen type, which reduces the difficulty and complexity of operation and improves the usability of the fume extraction system.

[0020] Preferably, the main control unit includes a temperature model database for various cuisines.

[0021] More preferably, the main control unit includes a database of temperature models for various cuisines, a self-learning module, a shop operation module, a virtual setting module, an air volume module, an air pressure module, a power consumption module, and a reminder module.

[0022] The temperature model database for various cuisines includes models for Beijing cuisine, Shanghai cuisine, Sichuan cuisine, Hunan cuisine, Cantonese cuisine, Shandong cuisine, Western cuisine, Japanese and Korean cuisine, and more. During debugging, parameters are input and set, and the system analyzes and calculates the data along with the temperature sensor. If the temperature is expected to rise continuously, the exhaust volume requirement is increased based on the nature of the restaurant. If the temperature remains unchanged or slightly decreases, it is determined that the restaurant is not yet in use, and the exhaust volume requirement is appropriately reduced. This allows for more precise control of the exhaust volume of the fume extraction system, further improving energy efficiency and environmental protection.

[0023] The self-learning module can automatically adjust the ventilation volume of shops based on usage rate. After a period of operation, the self-learning module can appropriately increase the required ventilation volume for frequently used or high-usage shops, automatically slightly increase the ventilation volume for high-usage shops, and slightly decrease the ventilation volume for low-usage shops, thereby improving energy efficiency.

[0024] The shop operation module allows for the setting of basic parameters for merchants based on their size. It can limit the shop's original airflow and, based on different cuisines, retrieve a basic temperature difference coefficient from the database to differentiate dynamic airflow levels caused by different cuisines, further improving energy efficiency. Simultaneously, all data collected during system operation can be used for data analysis and calculation for restaurant management, simulating restaurant operational data and even the consumption preferences and habits of mall customers to ensure more effective management by the operator.

[0025] The virtual settings module is used to configure the status of shops, switching between and differentiating between the non-operational period, the renovation period, and the operational period. After the commercial complex opens, the ventilation volume may vary due to differences in the order in which shops open and the timing of renovations. The virtual settings module will directly disconnect shops that are not yet in operation, saving energy and ensuring that the commercial complex maintains stable low-energy operation during the first year of instability. This optimizes overall energy consumption without affecting the user experience.

[0026] The airflow module is used to set the maximum airflow limit and calculate and control the airflow for each main and secondary duct. When an airflow valve is not fully open, it is preferable to increase the airflow of the valve currently in use. When the airflow of the valve currently in use reaches its maximum, the airflow from unused airflow valves is adjusted to the airflow of the valve currently in use to improve the user experience. Simultaneously, the setting of the maximum airflow limit ensures that the increased airflow will not affect the lifespan of the ductwork.

[0027] The wind pressure module is used to calculate the wind pressure of the fan unit and the wind pressure in the duct, monitor changes in the internal current of the system, judge the system's operating status, and ensure customer experience. By adjusting the wind pressure curve to compensate for discrepancies based on the airflow measurement per Hz of the frequency conversion, it ensures that each Hz adjustment fully meets the user's expected airflow experience in terms of efficiency. The corresponding current changes are also recorded and compared with the original value to monitor changes, judge the system's operating status, and analyze and provide hardware maintenance information for the exhaust equipment to the user. This allows for the prediction of potential equipment failures before damage occurs, facilitating maintenance and repair by the operator.

[0028] Preferably, the wind pressure module includes a curve calculation module, a static wind pressure module, and a dynamic wind pressure module.

[0029] The curve calculation module is used to record the corresponding current changes and compare them with the original values ​​to obtain the effective value of the short-circuit current periodic component at any time after the short circuit occurs. It monitors whether the fan unit and air conditioning fan are used normally. If an abnormal change in current occurs, the reminder module will remind the operator.

[0030] The static wind pressure module is used to monitor and calculate the wind pressure required to overcome pipeline resistance.

[0031] The dynamic wind pressure module is used to monitor and calculate the wind pressure when driving the oil fume exhaust pipe.

[0032] The power consumption module can provide detailed statistics on each merchant's power consumption, including usage rate, duration, and monthly power consumption. It can also record detailed power consumption data and duration over a year. This comprehensive statistical analysis of the entire exhaust system down to each merchant's specific power consumption percentage and duration allows users to easily track usage and power consumption for each merchant, enhancing the accuracy of parameter settings for the main control unit and enabling operators to better manage their businesses.

[0033] The reminder module can provide reminders for equipment malfunctions, cleaning, and maintenance, such as fans and ducts.

[0034] Preferably, the main control unit has at least four different methods for collecting merchant data.

[0035] The electric regulating valve for the fan is used to control the opening and closing of the valve.

[0036] Preferably, the electric regulating valve for the fan includes a BA control module.

[0037] Preferably, the electric regulating valve for the fan is an on / off type. On / off type electric regulating valves for fans close quickly, have good sealing performance, prevent the generation of oil fumes and odors within the building, and improve environmental protection standards.

[0038] Preferably, the number of the electric regulating valves for the fan is 1 to 3.

[0039] The electric regulating valve for the shop is used to control the valve opening degree of the air valve (linear or angular stroke when opening).

[0040] Preferably, the electric regulating valve for shops includes a BA control module.

[0041] Preferably, the electric regulating valve for the shop is an analog type. The analog type electric regulating valve can control the valve opening via a main controller based on the required smoke and air volume, thus compensating for the shortcomings of the electric regulating valve for the fan and further improving energy efficiency.

[0042] Preferably, the number of electric regulating valves for shops is 1 to 30.

[0043] The fan unit is used for the purification and emission of oil fumes, preventing the generation of oil fumes and odors in the building, which would lower the commercial level and have an adverse impact on the surrounding environment and human health.

[0044] Preferably, the fan unit includes an exhaust fan and an oil fume purifier.

[0045] Preferably, the number of wind turbine units is 1 to 3.

[0046] Preferably, the number of exhaust fans is 1 to 3.

[0047] Preferably, the number of the fume purifiers is 1 to 3.

[0048] More preferably, the number of exhaust fans equals the number of fume purifiers.

[0049] Preferably, the fume extraction system further includes a network connection port.

[0050] The network connection port is used to upload wireless data network data to the main control unit to meet the needs of background data integration and feedback.

[0051] More preferably, the fume extraction system also includes a frequency converter.

[0052] The frequency converter is used to adjust the fan power to ensure that the fan frequency can be adjusted in a timely manner when the exhaust volume of the fume extraction system changes due to changes in the amount of fume extracted in the shop or malfunctions of the fume extraction system, thereby improving energy efficiency.

[0053] Preferably, the fume extraction system is equipped with an on / off switch, an off switch, and an emergency switch. The on / off switch is used to turn on the fume extraction system, the off switch is used to turn off the fume extraction system, and the emergency switch is used to activate the remaining devices in case any one device fails when multiple fans are connected in parallel. This improves the ease of use of the fume extraction system and ensures that the entire fume extraction system can be used normally in the event of a malfunction.

[0054] Preferably, the power supply cable for the electric valve of the exhaust system is BVVB 2.5*3.

[0055] like Figure 9 As shown, the preferred distribution method for the fan units and smoke shafts is centralized. In contrast, traditional rooftop smoke shafts have dispersed fan arrangements, with a maximum horizontal radius of approximately 15 meters for exhaust duct coverage and a maximum exhaust volume typically of 40,000 m³ / h. 3Each exhaust shaft can only handle a maximum load of about 5 shops per hour, making it impossible to adjust for end-user demand and limiting system flexibility. Centralized distributed exhaust shafts cover a maximum horizontal radius of approximately 30 meters, with a maximum exhaust volume typically of 150,000 m³ / h. 3 / h, each shaft can handle a maximum load of about 30 shops, and together with electric regulating valves for shops and other air volume valves, the terminal demand can be adjusted at any time, allowing for flexible application of the system.

[0056] The second aspect of the present invention provides an intelligent kitchen exhaust system for shops, which is applied in the field of kitchen exhaust technology.

[0057] A smart exhaust system for shops, such as Figure 2 As shown, when the shop begins operation, the exhaust control switch is turned on. Data from the shop is then collected by the data collector and the shop temperature sensor and transmitted to the main control unit. The main control unit performs comprehensive calculations and analysis, and based on the calculation results, opens the airflow valve via the electric regulating valve. The opening degree of the airflow valve is controlled by the shop's electric regulating valve, and the frequency of the fan is adjusted by the frequency converter, causing the fan unit to start working. The fan unit first extracts the oil fumes through the exhaust fan, then the fumes are purified by the oil fume purifier, and finally extracted and discharged by the exhaust fan.

[0058] Beneficial effects:

[0059] This invention employs chip management technology to collect diverse data from sensors and data acquisition devices in each shop. A main controller integrates and controls the frequency converter, fan, and adjustable airflow valve, ensuring the kitchen maintains a slight negative pressure balance. Based on user needs and usage habits, the system controls and sets the exhaust volume and airflow variations for each shop's kitchen, maintaining a balance of airflow and pressure throughout the ventilation system. This achieves real-time intelligent allocation of supply and exhaust air volume, optimizing energy consumption to achieve the lowest possible energy output, ultimately realizing a truly intelligent energy-saving solution.

[0060] This invention features comprehensive reminder functions and robust emergency backup measures for equipment failures. It can remind users to clean and maintain the entire system based on the actual usage of the equipment, ensuring long-term reliable and stable operation of the system.

[0061] Due to the unique nature of commercial complexes, tenants are constantly changing, especially during the leasing phase, where significant changes are often observed. Intelligent fume extraction systems can optimize the original design airflow based on actual usage and can be implemented in phases, perfectly addressing the changes that occur at different stages of design and leasing. After operation, adjustments can be made more flexibly, allowing for greater flexibility in both initial shop planning and subsequent operational adjustments to meet the evolving needs of different business formats.

[0062] This invention can accurately track the electricity usage of each shop, providing verifiable data for shop leasing and equipment management. This helps operators achieve precise data control, easy management, and improved operational efficiency. The open system can also be expanded to include an air conditioning control system. Furthermore, the multi-fan control offers high flexibility, high efficiency, and energy savings, reducing energy consumption by over 50%. It provides shopping malls with a more intuitive analysis of the overall catering business, helping users better manage their malls. Attached image description:

[0063] Figure 1 -Architectural diagram of intelligent kitchen exhaust system for commercial complex;

[0064] Figure 2 - Schematic diagram of the intelligent fume extraction system in a commercial complex;

[0065] Figure 3 -Schematic diagram of the main control unit of the intelligent fume extraction system in a commercial complex;

[0066] Figure 4 -Schematic diagram of the intelligent fume extraction system in a commercial complex when it is first used in a shop;

[0067] Figure 5 -Schematic diagram of the intelligent fume extraction system in the commercial complex when used in the second shop;

[0068] Figure 6 -Schematic diagram of the intelligent fume extraction system in the commercial complex when all shops are in use;

[0069] Figure 7 -Schematic diagram of a single fan malfunctioning in an intelligent exhaust system for commercial complexes;

[0070] Figure 8 -Schematic diagram of the intelligent exhaust system for commercial complexes during store adjustments;

[0071] Figure 9 - Schematic diagram of exhaust fume well and fan unit layout;

[0072] Figure 10 - Schematic diagram of the usable area of ​​the existing shaft;

[0073] Figure 11 - A schematic diagram showing the usable area of ​​the well shaft of the intelligent exhaust system in a commercial complex;

[0074] Figure 12 - Schematic diagram of the cost test for existing pipeline materials;

[0075] Figure 13 - Schematic diagram of material cost test for intelligent exhaust system ductwork in commercial complex;

[0076] Figure 14- A schematic diagram of a shaft case in Xiaolan Harbour City, Zhongshan;

[0077] Figure 15 - A bar chart showing the smoke exhaust flow of each shop in Zhongshan Xiaolan Harbour City;

[0078] Figure 16 -A bar chart of air volume per time period in the Zhongshan Xiaolan Harbour City case study;

[0079] Figure 17 - A 3D pie chart showing the percentage of exhaust smoke flow in each shop at Zhongshan Xiaolan Harbour City;

[0080] Figure 18 - Line graphs showing the electricity load of the traditional solution and the solution of this invention in the Zhongshan Xiaolan Harbour City case study;

[0081] Figure 19 - Investment comparison table between the traditional system and this system of Xiaolan Harbour City Commercial Center.

[0082] in, Figure 1 The components are: 1. Main controller, 2. Shop temperature sensor, 3. Shop electric regulating valve, 4. Fan electric regulating valve, 5. Network connection port, 6. Variable frequency controller, 7. Exhaust fan, 8. Fume purifier, 9. Shop current sensor, 10. Shop exhaust control switch, 11. Equipment power supply. Detailed Implementation

[0083] Example

[0084] A smart exhaust system for shops, such as Figure 1-3 As shown, the equipment includes an exhaust fume control switch, a main control unit, a data acquisition unit, a shop temperature sensor, a shop electric regulating valve, a fan electric regulating valve, a fan unit, and a power supply.

[0085] The exhaust fume control switch includes a shop current sensor and a shop exhaust fume control switch. The exhaust fume control switch includes a BA control module. The number of exhaust fume control switches is 30. The number of shop current sensors is 15. The number of shop exhaust fume control switches is 15.

[0086] The shop temperature sensor includes a BA control module. There are 30 shop temperature sensors in total.

[0087] The main control unit has a built-in core chip or BA control module. It is a touchscreen main control unit. The main control unit includes a database of temperature models for various cuisines, a self-learning module, a store operation module, a virtual settings module, an airflow module, an air pressure module, a power consumption module, and a reminder module. The air pressure module includes a curve calculation module, a static air pressure module, and a dynamic air pressure module. The main control unit has four different methods for collecting merchant data.

[0088] The electric regulating valve for the fan includes a BA control module. The electric regulating valve for the fan is an on / off type. There are three electric regulating valves for the fan.

[0089] The electric regulating valve for the shop includes a BA control module. The electric regulating valve for the shop is an analog type. There are 30 electric regulating valves in total.

[0090] The fan unit includes an exhaust fan and an oil fume purifier. There are 3 fan units. There are 3 exhaust fans. There are 3 oil fume purifiers.

[0091] The fume extraction system also includes a network connection port and a frequency converter.

[0092] The exhaust system is equipped with an on / off switch, an off switch, and an emergency switch.

[0093] The power cord for the electric valve of the exhaust system is BVVB 2.5*3.

[0094] The fan units and flue gas wells are distributed in a centralized manner.

[0095] Specifically:

[0096] like Figure 4 As shown, when the first shop starts using the system, the exhaust control switch is turned on. The shop's temperature sensor collects data from the shop and transmits it to the main control unit. The main control unit performs comprehensive calculations and analysis, and based on the results, opens the airflow valve via the electric regulating valve for the fan. The opening of the airflow valve is controlled by the electric regulating valve for each shop, and the frequency of the fan is adjusted by the frequency converter. The first fan unit then begins operation. The fan unit first extracts the fumes through the exhaust fan, then the fumes are purified by the fume purifier, and finally, the fumes are extracted and discharged by the exhaust fan.

[0097] like Figure 5 As shown, when the second shop starts to use, the exhaust control switch is turned on. Then, the data of the fan unit is collected by the data collector and the shop temperature sensor and transmitted to the main control unit. The opening angle of the air volume valve is calculated through comprehensive calculation. The opening angle of the air volume valve is controlled by the electric regulating valve of the shop. The frequency converter controls the frequency of the fan unit and other methods to adjust the operating efficiency of the entire system. The first fan unit starts to work.

[0098] like Figure 6 As shown, when all shops start using the equipment, based on the data collected by the temperature sensors and collectors and the precise calculation and analysis by the main control unit, all three typhoon fan units are started and operated to their optimal state according to actual needs.

[0099] like Figure 7As shown, if one of the fans in the system fails, the system, through the coordinated efforts of the main control unit's air pressure module and other components, will immediately detect the fault via current monitoring and switch the other two fans into emergency mode, rapidly increasing airflow. This ensures the basic exhaust needs of all businesses are met and buys valuable time for maintenance by the operator. Simultaneously, multiple regulating valves and sensors can also be switched in an emergency to prevent the entire exhaust system from becoming unusable due to damage to one exhaust system component.

[0100] When the business format changes within a commercial complex, such as Figure 8 As shown, when the original #1 and #2 restaurants are replaced with department stores, and the department store on the left is converted into a restaurant, as long as the demand is within the total capacity, it can be directly reallocated and adjusted through the system. This is achieved by setting the original #1 and #2 airflow valves to be closed via the main control unit, while adding new #4 and #5 airflow valves. Parameters can then be adjusted in the virtual settings module and store operation module of the main control unit. This reduces redundant investment during operation and enhances overall flexibility.

[0101] Performance testing

[0102] 1. Test of usable area of ​​the shaft:

[0103] like Figure 10-11 As shown: Existing usable area of ​​the pipeline: 0.8 x 0.8 x 4 = 2.56 = ㎡; Usable area of ​​the pipeline after system improvement: 0.8 x 3.8 = 3.04㎡; Actual increase in usable area: 3.04 – 2.56 = 0.48㎡.

[0104] 2. Material cost test (taking a two-meter duct as an example):

[0105] like Figure 12-13 As shown: Original piping material usage area: (0.8 x 4 x 2) x 4 = 25.6 m²; Improved piping material usage area: (3.6 x 2 + 0.8 x 2) x 2 = 17.6 m²; Direct savings in piping material usage area: 25.6 - 17.6 = 8 m² 2 .

[0106] 3. Energy Saving Analysis: The Zhongshan Xiaolan Harbour City project covers an area of ​​23,861 square meters. The planned design consists of a 180-meter-high, 38-story hotel and office building, an 80,000-square-meter, 7-story shopping mall, and a three-level underground parking garage, with a total construction area of ​​200,000 square meters. The project utilizes the intelligent fume extraction system described in this invention to provide intelligent control and energy-saving services for its restaurants and supermarkets. The project has 26 various restaurants and one large supermarket, with a total fume extraction volume of 860,000 m³ / h. 3 / h. Now, we will use a 120,000 m3 / h well system in Xiaolan Harbour City, Zhongshan as a case study.

[0107] like Figure 14 As shown: Because the shops are distributed across different floors, and there is only one exhaust duct in this area, it is difficult to separate the shops independently. Therefore, the solution in the example is adopted, placing the shops on each floor near this area into this exhaust duct, and installing 3 sets of exhaust fans at the top.

[0108] Table 1 Smoke Exhaust Flow Rate of Each Shop

[0109] Floor merchants Catering type Q Shop #1 on the first floor Western fast food <![CDATA[10000m 3 / h]]> Shop #2 on the 3rd floor Coffee and light meals <![CDATA[10000m 3 / h]]> Shop #3 on the 3rd floor Chinese food <![CDATA[27000m 3 / h]]> Shop #4 on the 3rd floor Japanese food <![CDATA[5500m 3 / h]]> Shop #5 on the 4th floor hot pot <![CDATA[36000m 3 / h <!-- 6 -->]]> Shop #6 on the 4th floor Specialty Chinese food <![CDATA[27000m 3 / h]]> Shop #7 on the 4th floor Specialty snacks <![CDATA[6000m 3 / h]]> total <![CDATA[121500m 3 / h]]>

[0110] As shown in Table 1, Figure 15 , Figure 16 As shown, it exceeds 40,000m 3 The restaurant operates for over 16 hours a day, with an air volume of 20,000 cubic meters per second exceeding 20 hours, and there's also a 24-hour Western fast-food chain. Hot pot restaurants typically operate for even longer than Chinese restaurants. If designed using traditional methods, the need for fume extraction would generally involve at least 18 hours of operation.

[0111] like Figure 17 As shown, in addition to different operating hours, the exhaust fume requirements of each business also vary greatly. Analyzing based on the total daily operating volume, hot pot restaurants have the highest exhaust fume requirements, followed by Chinese restaurants. However, if analyzed based on the needs of individual businesses, Japanese cuisine and specialty snacks have the lowest exhaust fume requirements.

[0112] Table 2. Electricity load of traditional scheme and the present invention scheme at different times.

[0113]

[0114] As shown in Table 2 and Figure 18 As shown, according to the traditional solution, the total air volume is over 120,000 cubic meters per second, and the three 18.5 kW exhaust fans consume 55.5 kWh per hour. Only by independently exhausting the 24-hour McDonald's (requiring an additional exhaust shaft), and considering the restaurant's operating hours, it would need to operate for at least 20 hours per day, consuming approximately 1100 kWh. With the intelligent solution, the power load is reduced to no more than 7 hours per day, significantly decreasing for the majority of the time. The total energy consumption is generally below 550 kWh, achieving an energy saving rate of approximately 45% to 50%.

[0115] 4. Economic Analysis: Taking Xiaolan Harbor Commercial Center as an example: an 80,000 square meter mall with an oil fume emission of 460,000 cubic meters. 3 For example, / h.

[0116] Annual electricity cost calculation model:

[0117] 1. The amount of cooking fumes is calculated at 460,000 m³. 3 / h, total power of the exhaust fan is 220kW, and the fresh air volume is calculated at 70%;

[0118] 2. Optimized management through an intelligent fume extraction system, resulting in an average energy consumption reduction of 45% during use;

[0119] 3. The negative pressure airflow of the air conditioner in public areas decreases, calculated as a 45% reduction;

[0120] 4. The exhaust fan is calculated based on 12 hours of operation per day, and the air conditioner is calculated based on 180 days per year;

[0121] 5. The average cost per kilowatt-hour is calculated at 0.7 yuan.

[0122] Energy saving for wind turbines: The energy consumption of wind turbines is reduced to (90kW)*12h*365 days = 390,000 kWh.

[0123] Air conditioning energy saving: Reduced negative pressure airflow in air conditioners (62000m³ / h) 3 / h)*Volume ratio difference (1.293)*Refrigeration efficiency (35%)*Enthalpy difference (12) / 3600*12h*180 days = 200,000 degrees.

[0124] Total energy savings for the year: 200,000 + 390,000 = 590,000 kWh.

[0125] Total electricity savings for the year: 590,000 * 0.7 = 413,000 yuan.

[0126] like Figure 19 As shown: The traditional system requires an additional one-time investment of 395,000 yuan compared to the new system (the fume extraction system of this invention). It saves approximately 413,000 yuan in electricity costs annually, and the cost is recovered in 11.5 months.

Claims

1. An intelligent exhaust system for commercial shops, characterized in that, Includes exhaust control switch, main control unit, data acquisition unit for fan unit, shop temperature sensor, shop electric regulating valve, fan electric regulating valve, fan unit, equipment power supply, and network connection port; When the shop starts to be used, turn on the exhaust control switch, and then collect the shop data through the data collector and shop temperature sensor and send it to the main control unit. After the main control unit performs comprehensive calculation and analysis, it opens the air volume valve through the electric regulating valve of the fan according to the calculation results. The opening degree of the air volume valve is controlled by the electric regulating valve of the shop and the frequency of the fan is adjusted by the frequency converter, and the fan unit starts to work. The main control unit includes a database of temperature models for various cuisines, a self-learning module, a shop operation module, a virtual setting module, an air volume module, an air pressure module, a power consumption module, and a reminder module; The temperature model database for various cuisines includes temperature database models for various cuisines. During debugging, parameters are input and set, and the data is analyzed and calculated together with the temperature sensor. If the temperature continues to rise, the ventilation volume requirement will be increased according to the nature of the restaurant. If the temperature does not change, it will be determined that the restaurant is not in use, and the ventilation volume requirement will be reduced appropriately. The self-learning module can automatically adjust the ventilation volume of the shops according to the usage rate. After a period of operation, the self-learning module will automatically increase the ventilation volume slightly for shops with high usage and decrease the ventilation volume slightly for shops with low usage. The shop operation module can set basic settings parameters for different merchants based on their size, limit the original air volume of the shop, and retrieve the basic temperature difference coefficient from the database based on different cuisines to distinguish the dynamic air volume differences caused by different cuisines of the merchants. The virtual settings module is used to set the status of the store, and to switch and distinguish between the non-operation period and the operation period. The virtual settings module will directly disconnect the store that is not in operation. The air volume module is used to set the maximum air volume limit, calculate and control the air volume of each main and secondary pipe, enhance the air volume of the air volume valve in use when the air volume valve is not fully open, and adjust the air volume of the unused air volume valve to the air volume valve in use to enhance the user experience when the air volume valve in use reaches its maximum. The wind pressure module is used to calculate the wind pressure of the fan unit and the wind pressure in the pipeline, monitor the changes in the internal current of the system, judge the operating status of the system, and adjust the wind pressure curve to compensate for the difference by calculating the air volume per Hz of frequency conversion. This ensures that every 1 Hz adjustment can fully meet the user's expected air volume experience in terms of efficiency. The corresponding current changes are also recorded and compared with the original value to monitor the changes, judge the operating status of the system, and analyze the hardware maintenance of the exhaust equipment and provide it to the user. Before the equipment is damaged, potential faults can be predicted to facilitate the operator's maintenance of the equipment. The wind pressure module includes a curve calculation module, a static wind pressure module, and a dynamic wind pressure module; The curve calculation module is used to record the corresponding current changes and compare them with the original values ​​to obtain the effective value of the short-circuit current periodic component at any time after the short circuit occurs. It monitors whether the fan unit and air conditioning fan are used normally. If an abnormal change in current occurs, the reminder module will remind the operator. The static wind pressure module is used to monitor and calculate the wind pressure when overcoming pipeline resistance; The dynamic wind pressure module is used to monitor and calculate the wind pressure when driving the oil fume exhaust pipe; The power module allows users to easily and completely track the usage rate and power consumption of each merchant, enhancing the accuracy of the main control unit's parameter settings for the entire ventilation system. The reminder module can provide reminders for equipment malfunctions, cleaning, and maintenance.

2. The intelligent exhaust system for shops according to claim 1, characterized in that, The exhaust fume control switch includes a shop current sensor and / or a shop exhaust fume control switch.

3. The intelligent exhaust system for shops according to claim 2, characterized in that, The main controller has a built-in core chip or BA control module.

4. The intelligent exhaust system for shops according to claim 3, characterized in that, The electric regulating valve for the fan is an on / off type.

5. The intelligent exhaust system for shops according to claim 4, characterized in that, The electric regulating valve for the shop is an analog type.

6. The intelligent exhaust system for shops according to claim 5, characterized in that, The fan unit includes an exhaust fan and an oil fume purifier.

7. The intelligent exhaust system for shops according to claim 6, characterized in that, The exhaust system also includes a frequency converter.

8. The application of the intelligent kitchen exhaust system for shops according to claim 7 in the field of kitchen exhaust technology.

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