Efficient and energy-saving type oil fume port microenvironment humidity adjusting system

Abstract

The invention relates to the technical field of oil fume purification, and discloses an efficient and energy-saving oil fume port microenvironment humidifying system which comprises a flue gas treatment pipeline, a variable-frequency induced draft fan and an intelligent control system, an air inlet of the flue gas treatment pipeline is fixedly connected and communicated with a main flue of a kitchen, and the variable-frequency induced draft fan is installed on the flue gas treatment pipeline; a front coarse purification mechanism, a deep fine treatment deodorization mechanism and an intelligent spraying and humidifying mechanism are sequentially mounted on the flue gas treatment pipeline in the airflow direction; the intelligent spraying and humidifying mechanism comprises a pressurized water supply assembly and an annular spraying and atomizing assembly, the pressurized water supply assembly is used for supplying water into the annular spraying and atomizing assembly, and the annular spraying and atomizing assembly is mounted at the exhaust port of the flue gas treatment pipeline. The functions of efficient purification of cooking fume, intelligent adjustment of exhaust temperature and humidity, peculiar smell removal and the like are deeply integrated, efficient purification of cooking fume is achieved, the temperature, humidity and visual impression are actively regulated and controlled, and energy consumption of the system is reduced.

Description

Technical Field

[0001] This invention relates to the field of oil fume purification technology, and in particular to a high-efficiency and energy-saving oil fume outlet microenvironment humidity control system. Background Technology

[0002] Restaurant fume emissions are a persistent and stubborn pollution problem in urban mixed zones, and a focal point of NIMBY (Not In My Backyard) conflicts. The emissions are complex, containing particulate matter, volatile organic compounds (VOCs), odor substances, and high-temperature, high-humidity exhaust gases. Currently, a series of technical approaches have been developed for the treatment of restaurant fumes, but all have certain limitations. Mechanical purification technology is low-cost but almost ineffective against submicron-sized fine particulate matter and gaseous VOCs; filters are prone to clogging, maintenance costs are high, and it lacks cooling and humidity control functions. Electrostatic deposition technology has high purification efficiency but poses safety hazards and secondary pollution, is sensitive to operating conditions, is complex to maintain, and has limited functionality. Wet scrubbing technology has some cooling effect, but consumes a lot of water, has high wastewater treatment costs, low energy efficiency, poor environmental adaptability, and insufficient purification depth. While combined and end-of-pipe treatment technologies can compensate for the shortcomings of single technologies, they are complex systems, require large areas, are costly, and fail to systematically address the control of the thermal and wet physical parameters of the emitted gases.

[0003] Existing technologies all focus on "meeting emission standards" as their core objective, neglecting the negative impact on the microenvironment surrounding cooking fume emission outlets. The high temperature of cooking exhaust gases easily forms localized "heat islands," exacerbating the urban heat island effect; the high moisture content of the exhaust gases makes them prone to condensation upon cooling, forming plumes that affect the city's aesthetics and may trigger complaints; the exhaust gases contain a large amount of energy, which current technologies do not recover and may consume even more energy in emissions; and purification and ventilation systems often operate independently, resulting in high energy consumption.

[0004] Therefore, a high-efficiency and energy-saving microenvironment humidity control system for kitchen exhaust vents is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a high-efficiency and energy-saving microenvironment humidity control system for kitchen exhaust vents, aiming to solve or improve at least one of the above-mentioned technical problems.

[0006] To achieve the above objectives, the present invention provides the following solution: The present invention provides a high-efficiency and energy-saving kitchen exhaust vent microenvironment humidity control system, including a flue gas treatment duct, a variable frequency exhaust fan and an intelligent control system. The air inlet of the flue gas treatment duct is fixedly connected to and communicates with the main exhaust duct of the kitchen. The variable frequency exhaust fan is installed on the flue gas treatment duct. A pre-treatment coarse purification mechanism, a deep fine treatment deodorization mechanism and an intelligent spray humidity control mechanism are sequentially installed on the flue gas treatment duct along the airflow direction. The intelligent spray humidification mechanism includes a pressurized water supply component and an annular spray atomizing component. The pressurized water supply component is used to supply water to the annular spray atomizing component, and the annular spray atomizing component is installed at the exhaust port of the flue gas treatment pipeline. The pre-treatment coarse purification mechanism, the deep fine treatment deodorization mechanism, the variable frequency induced draft fan, and the pressurized water supply component are all electrically connected to the intelligent control system.

[0007] According to the present invention, a high-efficiency and energy-saving microenvironment humidity control system for kitchen exhaust vents includes an annular spray atomizing component comprising: A ring-shaped liquid supply pipe is installed at the exhaust port of the flue gas treatment pipeline; the ring-shaped liquid supply pipe is electrically connected to the intelligent control system. A plurality of small spray heads are provided, and the small spray heads are arranged at equal intervals around the exhaust port of the flue gas treatment pipe via an angle adjustment component on the annular liquid supply pipe.

[0008] According to the present invention, a high-efficiency and energy-saving microenvironment humidity control system for kitchen exhaust vents is provided, wherein an internal temperature and humidity sensor is installed on the inner wall of the exhaust port of the flue gas treatment pipe, and an ambient temperature and humidity sensor is installed on the outer wall of the exhaust port of the flue gas treatment pipe. Both the internal temperature and humidity sensor and the ambient temperature and humidity sensor are electrically connected to the intelligent control system.

[0009] According to the present invention, a high-efficiency and energy-saving microenvironment humidity control system for kitchen exhaust vents is provided, wherein the angle between the spray direction of the small spray head and the airflow direction of the flue gas treatment pipe is 30° to 45°; the atomized particle size of the small spray head is ≤50μm, and the distance between two adjacent small spray heads is 10cm to 15cm.

[0010] According to the present invention, a high-efficiency and energy-saving oil fume outlet microenvironment humidity control system is provided, wherein the pressurized water supply component includes a water supply pipeline and an air supply pipeline, both of which are connected to the annular liquid supply pipeline. One end of the water supply pipeline is connected to a clean water supply source via a water pump, and one end of the air supply pipeline is connected to a compressed air source. Both the water supply pipeline and the gas supply pipeline are equipped with solenoid valves and flow regulating valves, and the water pump, the solenoid valves, and the flow regulating valves are all electrically connected to the intelligent control system.

[0011] According to the present invention, a high-efficiency and energy-saving oil fume outlet microenvironment humidity control system is provided, wherein the intelligent spray humidity control mechanism further includes a protective shell, the protective shell is installed on the outer wall of the exhaust port of the flue gas treatment pipeline, and a sealed liquid collection structure is detachably connected to the bottom of the protective shell.

[0012] According to the present invention, a high-efficiency and energy-saving oil fume outlet microenvironment humidity control system is provided, wherein the deep fine treatment and deodorization mechanism includes a high-efficiency baffle demister and a composite purification module; both the high-efficiency baffle demister and the composite purification module are installed on the flue gas treatment duct, and the high-efficiency baffle demister is arranged close to the pre-coarse purification mechanism. The composite purification module is equipped with an activated carbon adsorption layer and a UV photocatalytic component, and an oil collection tank is detachably connected to the bottom of the composite purification module.

[0013] According to the present invention, a high-efficiency and energy-saving microenvironment humidity control system for kitchen exhaust vents includes a pre-treatment coarse purification mechanism comprising a purification unit. The purification unit is equipped with a pressure sensor electrically connected to the intelligent control system. The purification unit adopts a mechanical baffle separator or a low-ozone electrostatic module.

[0014] According to the present invention, a high-efficiency and energy-saving microenvironment humidity control system for kitchen exhaust vents is provided, wherein a pollutant concentration sensor is installed inside the exhaust gas treatment pipeline, and the pollutant concentration sensor is electrically connected to the intelligent control system.

[0015] The present invention discloses the following technical effects: This invention uses a pressurized water supply component to supply water to a ring-shaped spray atomizing component. The ring-shaped spray atomizing component atomizes the clean water, and the water mist mixes thoroughly with the high-temperature exhaust gas. Through evaporation and heat absorption, the flue gas temperature is rapidly reduced, while sensible and latent heat in the flue gas is consumed, preventing the formation of local heat islands. When the relative humidity of the flue gas or the ambient temperature is lower than a preset threshold, the intelligent control system adjusts and reduces the output power of the pressurized water supply component, thereby reducing the water spray volume of the ring-shaped spray atomizing component or stopping spraying. This prevents excessive humidification from causing condensation or icing at the exhaust port, or from mixing with the ambient air to form white plumes. The ultrafine water mist has a secondary washing effect on the small amount of soluble pollutants remaining in the exhaust gas. At the same time, humidity control keeps the flue gas state point away from the saturation line, eliminating visual pollution from white plumes at the source, improving the visual landscape, and preventing the generation of secondary pollutants such as ozone. The intelligent control system can automatically adjust the system's operating status, reducing energy consumption while ensuring that purification standards are met. This invention pre-treats the high-temperature, high-oil-concentration fumes emitted from the main exhaust duct of the kitchen using a pre-treatment coarse purification mechanism. This removes liquid oil droplets, oil mist droplets, and large particulate dust, thereby reducing the pollutant load on the subsequent deep-treatment deodorization mechanism and preventing it from being clogged by oil. This lays the foundation for the long-term stable operation of the system. The deep-treatment deodorization mechanism then receives the pre-purified fumes and performs deep purification and odor removal. It further separates the residual tiny oil mist droplets and condensed water droplets in the fumes, reducing pollutant entrainment and efficiently removing volatile organic compounds, residual odor molecules, and fine particulate matter. This ensures that the pollutant concentration in the fumes meets emission standards, achieving highly efficient fumes purification. This invention integrates functions such as efficient fume purification, intelligent temperature and humidity regulation of exhaust gas, and odor removal into one unit through the synergistic effect of a pre-treatment coarse purification mechanism, a deep fine treatment deodorization mechanism, an intelligent spray humidity regulation mechanism, and an intelligent control system. It fundamentally improves the air quality and physical environment near the fume emission outlet, achieves efficient purification of catering fumes, and actively regulates temperature, humidity, and visual appearance, thereby reducing system energy consumption. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of the present invention.

[0018] The components include: 1. Flue gas treatment duct; 2. Variable frequency induced draft fan; 3. Pre-filter coarse purification mechanism; 4. Deep fine treatment and deodorization mechanism; and 5. Intelligent spray humidity control mechanism. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Reference Figure 1 This invention provides a high-efficiency and energy-saving kitchen exhaust vent microenvironment humidity control system, including a flue gas treatment duct 1, a variable frequency exhaust fan 2, and an intelligent control system. The air inlet of the flue gas treatment duct 1 is fixedly connected to and communicates with the main exhaust duct of the kitchen. The variable frequency exhaust fan 2 is installed on the flue gas treatment duct 1. A pre-filter coarse purification mechanism 3, a deep fine treatment deodorization mechanism 4, and an intelligent spray humidity control mechanism 5 are installed sequentially along the airflow direction on the flue gas treatment duct 1. The intelligent spray humidification mechanism 5 includes a pressurized water supply component and an annular spray atomizing component. The pressurized water supply component is used to supply water to the annular spray atomizing component, which is installed at the exhaust port of the flue gas treatment pipeline 1. The pre-filter coarse purification unit 3, the deep fine treatment deodorization unit 4, the variable frequency induced draft fan 2, and the pressurized water supply components are all electrically connected to the intelligent control system; In this configuration, the present invention pressurizes the water supply to the annular spray atomizing component, which then atomizes the water. The water mist mixes thoroughly with the high-temperature exhaust gas, rapidly reducing the flue gas temperature through evaporative heat absorption, while simultaneously consuming the sensible and latent heat in the flue gas, thus preventing the formation of localized heat islands. When the relative humidity of the flue gas or the ambient temperature falls below a preset threshold, the intelligent control system adjusts and reduces the output power of the pressurized water supply component, thereby reducing the water spray volume of the annular spray atomizing component or stopping the spraying process. This prevents excessive humidification from causing condensation or icing at the exhaust port, or from mixing with ambient air to form white plumes. The ultrafine water mist has a secondary washing effect on the small amount of soluble pollutants remaining in the exhaust gas. At the same time, humidity control keeps the flue gas state point away from the saturation line, eliminating visual pollution from white plumes at the source, improving the visual landscape, and preventing the generation of secondary pollutants such as ozone. The intelligent control system can automatically adjust the system's operating status, reducing energy consumption while ensuring that purification standards are met. This invention pre-treats the high-temperature, high-oil-concentration fumes emitted from the main exhaust duct of the kitchen using a pre-treatment coarse purification mechanism 3. This removes liquid oil droplets, oil mist droplets, and large particulate dust, thereby reducing the pollutant load on the subsequent deep fine treatment and deodorization mechanism 4 and preventing it from being clogged by oil. This lays the foundation for the long-term stable operation of the system. The deep fine treatment and deodorization mechanism 4 receives the pre-purified fumes and performs deep purification and odor removal. It further separates the residual tiny oil mist droplets and condensed water droplets in the fumes, reducing pollutant entrainment and efficiently removing volatile organic compounds, residual odor molecules, and fine particulate matter. This ensures that the pollutant concentration in the fumes meets emission standards, achieving efficient purification of fumes. This invention integrates functions such as efficient oil fume purification, intelligent adjustment of exhaust temperature and humidity, and odor removal into one unit through the synergistic effect of the pre-treatment coarse purification mechanism 3, the deep fine treatment deodorization mechanism 4, the intelligent spray humidity adjustment mechanism 5, and the intelligent control system. It fundamentally improves the air quality and physical environment near the oil fume emission outlet, achieves efficient purification of catering oil fumes, and actively controls temperature, humidity, and visual appearance, thereby reducing system energy consumption.

[0022] Further optimization of the scheme, the annular spray atomizing component includes: A ring-shaped liquid supply pipe is installed at the exhaust port of flue gas treatment pipe 1; the ring-shaped liquid supply pipe is electrically connected to the intelligent control system. Several small spray heads are provided. The small spray heads are arranged at equal intervals around the exhaust port of the flue gas treatment pipeline 1 via an angle adjustment component on the annular liquid supply pipe. An annular liquid supply pipe is installed at the exhaust port of flue gas treatment duct 1, providing a stable liquid flow delivery channel for several small spray heads. It is electrically connected to the intelligent control system, enabling precise start and stop of the liquid supply in accordance with system commands. Several small spray heads are mounted on the annular liquid supply pipe via tilt adjustment components, arranged at equal intervals around the exhaust port. This circumferential spacing ensures that the water mist evenly covers the entire exhaust cross-section, guaranteeing full contact between the water mist and the high-temperature flue gas and preventing uneven local humidification. The tilt adjustment components can fine-tune the spray angle according to the flue gas flow state, achieving optimal mixing between the water mist and flue gas, improving evaporation heat absorption efficiency and plume elimination effect, while enhancing the secondary washing capability for residual soluble pollutants, ensuring the coordinated achievement of humidification, cooling, and secondary purification standards.

[0023] The scheme is further optimized by installing an internal temperature and humidity sensor on the inner wall of the exhaust port of the flue gas treatment pipe 1 and an ambient temperature and humidity sensor on the outer wall of the exhaust port of the flue gas treatment pipe 1. Both the internal temperature and humidity sensor and the ambient temperature and humidity sensor are electrically connected to the intelligent control system. An internal temperature and humidity sensor on the inner wall of the exhaust port of flue gas treatment duct 1 monitors the temperature and humidity parameters of the purified flue gas in real time, accurately capturing the state of the flue gas itself. An environmental temperature and humidity sensor on the outer wall of the exhaust port simultaneously collects temperature and humidity data from the external environment, providing dual-dimensional data support for the intelligent control system. Both are electrically connected to the intelligent control system. By comparing and analyzing the two sets of data, the system accurately judges the risk of white plumes forming after the flue gas is emitted and mixes with the ambient air. It then dynamically adjusts the operating status of the pressurized water supply components to avoid over-humidification leading to condensation or icing at the exhaust port, or insufficient humidification failing to eliminate plumes, thus achieving precise and intelligent temperature and humidity control.

[0024] Further optimization of the scheme: the angle between the spray direction of the small spray head and the airflow direction of the flue gas treatment duct 1 is 30° to 45°. This angle can not only avoid the water mist being directly dispersed by the airflow, resulting in insufficient contact, but also prolong the residence time of the water mist in the flue gas, thereby enhancing the evaporation heat absorption and pollutant washing effect.

[0025] The small spray nozzle has an atomization particle size of ≤50μm. The ultra-fine water mist with an atomization particle size of ≤50μm has a large specific surface area and a fast evaporation rate. It can quickly absorb the heat of the flue gas to achieve cooling, and at the same time, it can accurately capture the tiny pollutants remaining in the flue gas. The spacing between two adjacent small spray heads is 10cm to 15cm. Combined with the circumferential arrangement structure, a uniform water mist curtain can be formed at the exhaust port, ensuring no spray dead zones, balancing humidity control efficiency and water resource utilization, and avoiding localized untreated flue gas due to excessive spacing, or water waste due to insufficient spacing.

[0026] The scheme was further optimized. The pressurized water supply component includes a water supply pipeline and an air supply pipeline. Both the water supply pipeline and the air supply pipeline are connected to the ring-shaped liquid supply pipeline. One end of the water supply pipeline is connected to the clean water supply source through a water pump, and one end of the air supply pipeline is connected to the compressed air source. Solenoid valves and flow regulating valves are installed on both the water supply pipeline and the gas supply pipeline. The water pump, solenoid valves, and flow regulating valves are all electrically connected to the intelligent control system. The pressurized water supply component adopts a dual-path design with both water and air supply lines, both connected to a ring-shaped liquid supply pipe to form a gas-liquid mixed pressurization mode. The water supply line is connected to a clean water source via a water pump to provide water for the spray; the air supply line is connected to a compressed air source, using air pressure to assist in pressurization, resulting in better water mist atomization and more uniform particle size.

[0027] The solenoid valves and flow regulating valves on the water supply pipeline and the air supply pipeline, together with the water pump, are electrically connected to the intelligent control system. The system can adjust the flow and pressure of the water and air paths respectively according to the data of the temperature and humidity sensors and the pollutant concentration sensors, so as to achieve precise control of the water spray volume and atomized particle size. It can not only meet the humidity control needs under different working conditions, but also minimize the energy consumption of the water pump and compressed air source, thus achieving the goal of energy saving.

[0028] Further optimizing the scheme, the intelligent spray humidification mechanism 5 also includes a protective shell, which is installed on the outer wall of the exhaust port of the flue gas treatment pipe 1, and a sealed liquid collection structure is detachably connected to the bottom of the protective shell. The protective housing is installed on the outer wall of the exhaust port of flue gas treatment duct 1. It can block external wind, rain, and dust from corroding the annular spray atomizing components, preventing damage to the components and affecting operational stability. At the same time, it can concentrate the airflow and water mist in the spray area, improving mixing efficiency. The bottom of the protective housing has a detachable sealed liquid collection structure to collect incompletely evaporated water mist, contaminated liquid from secondary washing, and water droplets condensed at the discharge port, preventing wastewater dripping and polluting the surrounding environment. The sealed design prevents odor leakage, and the detachable structure facilitates regular cleaning of the liquid collection, reducing maintenance difficulty and ensuring the cleanliness and environmental friendliness of the system operation.

[0029] The scheme is further optimized. The deep fine treatment and deodorization mechanism 4 includes a high-efficiency baffle demister and a composite purification module. Both the high-efficiency baffle demister and the composite purification module are installed on the flue gas treatment pipe 1. The high-efficiency baffle demister is set close to the pre-coarse purification mechanism 3. The composite purification module is equipped with an activated carbon adsorption layer and a UV photocatalytic component. The bottom of the composite purification module is detachably connected to an oil collection tank. The high-efficiency baffle demister of the deep fine treatment and deodorization mechanism 4 is located close to the pre-coarse purification mechanism 3. It receives the flue gas after pre-purification and separates the tiny oil mist droplets and condensed water droplets remaining in the flue gas through the guiding effect of the baffle plate and the principle of inertial collision, thereby reducing the entrainment of pollutants and reducing the load on subsequent deodorization and purification.

[0030] The activated carbon adsorption layer within the composite purification module efficiently adsorbs volatile organic compounds and residual odor molecules from flue gas, while the UV photocatalytic component degrades small-molecule pollutants and bacteria. Together, they achieve deep deodorization and purification, ensuring that flue gas odor meets standards. A removable oil collection tank at the bottom of the composite purification module collects oil and waste liquid generated during adsorption and degradation. Regular disassembly and cleaning are sufficient to prevent oil buildup and clogging, extending the module's lifespan.

[0031] The scheme is further optimized. The pre-treatment coarse purification mechanism 3 includes a purification unit. The purification unit is equipped with a pressure sensor that is electrically connected to the intelligent control system. The purification unit adopts a mechanical baffle separator or a low ozone electrostatic module. The pre-filter coarse purification unit 3 uses a mechanical baffle separator or a low-ozone electrostatic module to adapt to different oil fume concentrations. Mechanical baffle separators remove liquid oil droplets and large dust particles through physical interception, and have a simple structure and are easy to maintain; The low-ozone electrostatic module captures fine oil mist droplets through electrostatic adsorption, resulting in high purification efficiency and no secondary ozone pollution.

[0032] The pressure sensor on the purification unit is electrically connected to the intelligent control system to monitor the pressure difference before and after the purification unit in real time. When the pressure difference exceeds the preset threshold, it indicates that the unit is blocked by oil. The system will issue an early warning signal in time to remind the staff to clean or replace the parts to avoid poor flue gas flow and increased energy consumption due to blockage, and ensure the long-term stable operation of the system.

[0033] The scheme has been further optimized by installing a pollutant concentration sensor inside the flue gas treatment duct 1, which is electrically connected to the intelligent control system. A pollutant concentration sensor monitors the concentration of pollutants in the flue gas after passing through the pre-treatment coarse purification unit 3 and the deep treatment deodorization unit 4, and transmits the data to the intelligent control system. The system dynamically adjusts the operating status of each purification component and the variable frequency induced draft fan 2 by comparing the monitoring data with preset emission standards. If the concentration exceeds the standard, the power of the variable frequency induced draft fan 2 can be increased to speed up the flue gas circulation, or the operating efficiency of the deep fine treatment and deodorization mechanism 4 can be enhanced. If the concentration meets the standard, maintain the low-energy operation mode.

[0034] Meanwhile, sensor data can verify the secondary washing effect of the intelligent spray humidification mechanism 5, forming a closed loop of "purification-monitoring-control" to ensure that the concentration of pollutants in flue gas continues to meet the standards, taking into account both purification effect and energy saving requirements.

[0035] The design has been further optimized. The small spray head has a built-in high-pressure backflush valve core. The high-pressure backflush valve core is connected to the air supply line of the pressurized water supply component through the backflush pipe. A solenoid valve that is electrically connected to the intelligent control system is installed on the backflush pipe. The intelligent control system triggers a backflush program at regular intervals, using compressed air to reverse-impact the nozzles, removing scale and impurities that clog them. Combined with water flushing, this ensures stable atomized particle size and prevents nozzle clogging from affecting the humidity control and feather elimination effect.

[0036] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0037] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. For those skilled in the art, other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A high-efficiency and energy-saving microenvironment humidity control system for kitchen exhaust vents, characterized in that, The system includes a flue gas treatment duct (1), a variable frequency induced draft fan (2), and an intelligent control system. The air inlet of the flue gas treatment duct (1) is fixedly connected to and communicates with the main flue gas duct of the kitchen. The variable frequency induced draft fan (2) is installed on the flue gas treatment duct (1). The flue gas treatment duct (1) is equipped with a pre-treatment coarse purification mechanism (3), a deep fine treatment deodorization mechanism (4), and an intelligent spray humidification mechanism (5) in sequence along the airflow direction. The intelligent spray humidification mechanism (5) includes a pressurized water supply component and an annular spray atomizing component. The pressurized water supply component is used to supply water to the annular spray atomizing component. The annular spray atomizing component is installed at the exhaust port of the flue gas treatment pipe (1). The pre-treatment coarse purification mechanism (3), the deep fine treatment deodorization mechanism (4), the variable frequency induced draft fan (2) and the pressurized water supply component are all electrically connected to the intelligent control system.

2. The high-efficiency energy-saving oil fume outlet microenvironment humidity control system according to claim 1, characterized in that: The annular spray atomizing component includes: A ring-shaped liquid supply pipe is installed at the exhaust port of the flue gas treatment pipe (1); the ring-shaped liquid supply pipe is electrically connected to the intelligent control system. A plurality of small spray heads are provided. The small spray heads are arranged at equal intervals around the exhaust port of the flue gas treatment pipe (1) via an angle adjustment component on the annular liquid supply pipe.

3. The high-efficiency energy-saving oil fume outlet microenvironment humidity control system according to claim 1, characterized in that: An internal temperature and humidity sensor is installed on the inner wall of the exhaust port of the flue gas treatment pipe (1), and an ambient temperature and humidity sensor is installed on the outer wall of the exhaust port of the flue gas treatment pipe (1). Both the internal temperature and humidity sensor and the ambient temperature and humidity sensor are electrically connected to the intelligent control system.

4. The high-efficiency energy-saving oil fume outlet microenvironment humidity control system according to claim 2, characterized in that: The angle between the spray direction of the small spray head and the airflow direction of the flue gas treatment pipe (1) is 30° to 45°; the atomized particle size of the small spray head is ≤50μm, and the distance between two adjacent small spray heads is 10cm to 15cm.

5. The high-efficiency energy-saving oil fume outlet microenvironment humidity control system according to claim 2, characterized in that: The pressurized water supply assembly includes a water supply pipeline and an air supply pipeline. Both the water supply pipeline and the air supply pipeline are connected to the annular liquid supply pipeline. One end of the water supply pipeline is connected to a clean water supply source via a water pump, and one end of the air supply pipeline is connected to a compressed air source. Both the water supply pipeline and the gas supply pipeline are equipped with solenoid valves and flow regulating valves, and the water pump, the solenoid valves, and the flow regulating valves are all electrically connected to the intelligent control system.

6. The high-efficiency energy-saving oil fume outlet microenvironment humidity control system according to claim 1, characterized in that: The intelligent spray humidification mechanism (5) also includes a protective shell, which is installed on the outer wall of the exhaust port of the flue gas treatment pipe (1), and the bottom of the protective shell is detachably connected to a sealed liquid collection structure.

7. The high-efficiency energy-saving oil fume outlet microenvironment humidity control system according to claim 1, characterized in that: The deep fine treatment deodorization mechanism (4) includes a high-efficiency baffle demister and a composite purification module; the high-efficiency baffle demister and the composite purification module are both installed on the flue gas treatment pipe (1), and the high-efficiency baffle demister is set close to the pre-coarse purification mechanism (3); The composite purification module is equipped with an activated carbon adsorption layer and a UV photocatalytic component, and an oil collection tank is detachably connected to the bottom of the composite purification module.

8. The high-efficiency energy-saving oil fume outlet microenvironment humidity control system according to claim 7, characterized in that: The pre-treatment coarse purification mechanism (3) includes a purification unit, which is equipped with a pressure sensor electrically connected to the intelligent control system. The purification unit adopts a mechanical baffle separator or a low-ozone electrostatic module.

9. The high-efficiency energy-saving oil fume outlet microenvironment humidity control system according to claim 1, characterized in that: A pollutant concentration sensor is installed inside the flue gas treatment pipe (1), and the pollutant concentration sensor is electrically connected to the intelligent control system.

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