Intelligent oil smoke separation system and implementation method thereof

Abstract

The invention discloses an intelligent oil-smoke separation system and an implementation method thereof. The intelligent oil-smoke separation system comprises a main controller subsystem, and a multi-stage condensation and cleaning module control subsystem, a variable-frequency speed-regulation exhaust control subsystem, a smoke hood control module subsystem and the like which are connected with the main controller subsystem. The multi-stage condensation and cleaning module control subsystem is connected with a multi-stage condensation and cleaning module, the multi-stage condensation and cleaning module adopts a multi-stage oil-gas separation design, and comprises a plurality of sub-modules which can be started as required, so that the multi-stage condensation and cleaning module can better meet the condensation and filtration requirements of environments with different oil smoke gas concentrations, and gas meeting related standards can be discharged favorably. The condensing surface is used for separating oil molecules and impurity components in thermal motion in the oil smoke mixed gas in a condensing manner, and the cleaning assembly is used for cleaning the condensing surface, so that the working effect of the condensing surface can be effectively ensured. The system provided by the invention adopts modular control, can better adapt to full-electronization and networking requirements of an information age process, and is beneficial to remote monitoring and maintenance.

Description

Technical Field

[0001] This invention relates to the field of electrical equipment, specifically to an intelligent oil fume separation system and its implementation method. Background Technology

[0002] To meet environmental protection needs, the national and local governments (Beijing and Shanghai) have revised emission standards for the catering industry, requiring the installation of high-efficiency purification facilities; the GB18483-2001 standard has been incorporated into the regulatory framework, forcing related industries to implement technological upgrades and requiring the establishment of a classification management system based on the degree of pollution. For example, catering businesses that process food by frying, stir-frying, or braising need to be equipped with more advanced equipment that meets environmental protection requirements. At the same time, online monitoring systems are being promoted to monitor emission data in real time and achieve precise law enforcement.

[0003] Traditional kitchen exhaust systems in venues, public catering establishments, and luxury hotels primarily function to extract the mixture of cooking fumes and gases into the outdoors, causing serious environmental pollution. The cooking fumes contain various harmful substances, the main ones being volatile organic compounds (VOCs). S This includes alkanes and alkenes, among which formaldehyde, benzene, and polycyclic aromatic hydrocarbons are strong carcinogens; fine particulate matter accounts for 76% of kitchen particulate matter, mainly from the cracking and combustion products of oils, and long-term inhalation will cause respiratory diseases; trans fatty acids generated by the oxidative isomerization of unsaturated fatty acids produced at high temperatures, such as 9t-C18:1, have an increased risk of cardiovascular disease.

[0004] In summary, in order to adapt to the upgrading of national environmental protection standards and provide people with a good ecological environment, it is necessary to develop a new type of intelligent oil fume separation system and its implementation method that is energy-saving, meets environmental protection requirements, and is in line with the progress of the information age, and is fully electronic and networked. Summary of the Invention

[0005] The purpose of this invention is to provide an intelligent oil fume separation system and its implementation method to solve one or more of the problems mentioned in the background art.

[0006] To achieve the above objectives, On one hand, this invention discloses an intelligent oil fume separation system, including a main controller subsystem and a multi-stage condensation and cleaning module control subsystem, wherein the multi-stage condensation and cleaning module control subsystem is connected to the main controller subsystem, wherein... The main controller subsystem is used to coordinate and control the operation of other subsystems connected to it; The multi-stage condensation and cleaning module control subsystem is connected to the multi-stage condensation and cleaning module. The multi-stage condensation and cleaning module adopts a multi-stage oil-gas separation design and includes several sub-modules. The sub-modules can be started as needed. Each sub-module is equipped with a condensation surface and a cleaning component. The condensation surface faces the direction of movement of the oil fume mixture. The condensation surface separates oil molecules and impurities in thermal motion from the oil fume mixture by condensation. The cleaning component is set corresponding to the condensation surface and is used to clean the condensation surface.

[0007] In some implementations... The submodule includes a temperature control component connected to the condensation surface. The temperature control component is used to reduce the temperature of the condensation surface, and the temperature control component can also increase the temperature of the condensation surface. The increased temperature of the condensation surface can improve the cleaning quality. The cleaning assembly includes an ultrasonic cleaning array that performs scanning cleaning on the corresponding condensation surface, and the ultrasonic cleaning array includes an ultrasonic transducer.

[0008] In some implementations... The temperature control component includes a semiconductor Peltier cooler. In the multi-stage condensation and cleaning module control subsystem, a converter is set corresponding to the semiconductor Peltier cooler. The converter is a full-bridge converter, which realizes the polarity switching of the high-current power supply applied to the semiconductor Peltier. The control subsystem of the multi-stage condensation and cleaning module is equipped with a conversion circuit for the ultrasonic transducer. The conversion circuit is either a half-bridge conversion circuit or a full-bridge conversion circuit.

[0009] In some implementations... The power excitation source required by the ultrasonic transducer in the conversion circuit is a half-bridge or full-bridge conversion circuit with floating output. The repetition frequency of the conversion circuit operates at the same resonant frequency as the ultrasonic transducer, which cleverly solves the problem of the high-frequency, high-power, and high-voltage excitation source required by the ultrasonic transducer. The distance from the ultrasonic transducer to the condensation surface is less than or equal to 1.5 cm.

[0010] In some embodiments, the specific structure of the half-bridge converter circuit is as follows: A half-bridge converter circuit includes an auxiliary power supply converter circuit, a modulation converter circuit, and a high-power converter circuit connected in series. The auxiliary power supply conversion circuit includes a single-chip AC / DC converter, resistors, optocouplers, diodes, a high-frequency isolation transformer, filters, and a common-mode inductor. The auxiliary power supply conversion circuit provides power to the chips involved in the half-bridge converter circuit. The modulation and conversion circuit includes a dual-channel PWM modulation chip, a dual-channel floating gate output power device driver chip, resistors, capacitors, and diodes. The PWM modulation chip outputs two complementary PWM waves with dead-time control to provide drive input signals for the power devices of the half-bridge converter. The high-power conversion circuit includes filters and common-mode inductors, fuses, lightning protection varistors, rectifier bridges, and power MOSFETs. The high-power conversion circuit is used to output a high-frequency power excitation source under the drive of two floating gate drive PWM signals. In the half-bridge conversion circuit, the load is directly applied to the midpoint between the connection point of the two power MOSFETs and the voltage divider filter network after rectification, realizing floating output.

[0011] In some embodiments, the intelligent oil fume separation system includes at least one oil fume concentration sensor, and the multi-stage condensation and cleaning module and the oil fume concentration sensor are both arranged in the exhaust duct. The oil fume concentration sensor is connected to the main controller subsystem and is used to detect the oil fume concentration in the flue. At least one oil fume concentration sensor is arranged in front of the multi-stage condensation and cleaning module.

[0012] In some implementations... The intelligent oil fume separation system includes a variable frequency speed regulation exhaust control subsystem connected to the main controller subsystem, which controls the exhaust rate of the exhaust system. The main controller subsystem connects to terminal devices, which include servers and other external devices, including one or more of mobile phones, computers, and tablets. Other external devices can access and view the data information detected and / or stored by the intelligent oil fume separation system through the main controller subsystem.

[0013] In some implementations... The main controller subsystem also has a fume hood control module subsystem connected to the main controller subsystem. The fume hood control module subsystem has one or more of the following functions: The stove control unit includes a switch that controls the power-on status of the electric stove and / or a valve on the gas stove that connects to the gas source, and monitors and / or controls the stove control unit. Connect the fire extinguishing device and control its operating status. Connect to the alarm device and control its operating status; The stove is equipped with a temperature sensor and / or an infrared sensor.

[0014] On the other hand, the present invention provides a method for implementing an intelligent oil fume separation system, the method of implementing the above-mentioned intelligent oil fume molecular system comprising the following steps: Real-time monitoring of the number of stoves in operation and the concentration of oil fumes in the exhaust duct; According to preset rules, control commands are issued to other subsystems connected to the main controller subsystem to control the operation of each subsystem.

[0015] In some implementations... Before real-time monitoring of the number of stoves in operation and the concentration of cooking fumes in the exhaust duct, the following steps are also included: Activate the main controller subsystem; Self-inspection generates self-inspection information; The system analyzes and judges the self-inspection information to determine whether the self-inspection is passed. If it is passed, the intelligent oil fume molecule system is activated to monitor the number of stoves that are turned on and the concentration of oil fumes in the exhaust duct in real time. If it fails, the intelligent oil fume molecule system is not activated and a maintenance command is issued. The main controller subsystem uploads self-test information, monitored data, and generated control and maintenance commands to the server to create logs, which can be retrieved and viewed by other external devices.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. It adopts a distributed control mode consisting of a main controller subsystem, a multi-stage condensation and cleaning module control subsystem, a fume hood control module subsystem, and a variable frequency speed regulation exhaust control subsystem, which facilitates the automatic filtration of oil fume mixture.

[0017] 2. The single-stage condensation and cleaning function components in the multi-stage condensation and cleaning module control subsystem adopt a modular design, i.e., sub-modules, which provides convenient applicability to meet different needs. For example, when dealing with exhaust ducts of different sizes, it is only necessary to change the size of the polished stainless steel cooling plate that is in close contact with the semiconductor cooling heating element and change the distribution of the semiconductor cooling heating element on the polished stainless steel cooling plate to achieve the desired effect. When dealing with situations with different oil fume concentrations and oil fume exhaust volumes, different numbers of sub-modules can be activated through the multi-stage condensation and cleaning module control subsystem.

[0018] 3. The use of ultrasonic cleaning array scanning to clean oil stains avoids the need for excessive ultrasonic cleaning transducers. The structural design with a distance of less than or equal to 1.5 cm between the ultrasonic transducer and the condensation surface helps to ensure that the ultrasonic energy is not severely attenuated due to the transmission distance.

[0019] 4. Using a half-bridge or full-bridge converter circuit can provide a high-frequency, high-power suspended load excitation source for the ultrasonic transducer; 5. By using a full-bridge converter to change the polarity of the high-current power supply applied to the semiconductor Peltier thermoelectric cooler, the cooling and heating modes of the semiconductor Peltier thermoelectric cooler can be switched. 6. Establishing connections between the main controller subsystem and servers and other external devices facilitates remote diagnosis, remote maintenance, and remote reconstruction of system operation modes, provides networked management functions, and discloses parameters such as the operation of each subsystem and the quality of emitted air. This fulfills the requirements of incorporating the national standard GB18483-2001 into supervision, promoting online monitoring systems to monitor emission data in real time, and achieving precise law enforcement. Attached Figure Description

[0020] Figure 1 This is a block diagram illustrating the principle of an intelligent oil fume separation system in some embodiments of the present invention; Figure 2 This is a block diagram of the electrical schematic of the main controller subsystem in some embodiments of the present invention; Figure 3 This is a block diagram of the electrical principle of the control subsystem for the multi-stage condensation and cleaning module in some embodiments of the present invention; Figure 4 This is a block diagram of the fume hood control module subsystem in some embodiments of the present invention; Figure 5 This is a circuit diagram of the microprocessor unit in the main controller subsystem in some embodiments of the present invention; Figure 6 This is a schematic diagram of the power supply unit in the main controller subsystem in some embodiments of the present invention; Figure 7 The circuit diagram of the step-down stabilization unit in the main controller subsystem is shown in some embodiments of the present invention. Figure 8 This is a circuit diagram of the auxiliary power supply conversion circuit in the multi-stage condensation and cleaning module control subsystem in some embodiments of the present invention; Figure 9 This is a circuit diagram of the modulation conversion circuit in the multi-stage condensation and cleaning module control subsystem in some embodiments of the present invention; Figure 10 This is a circuit diagram of the high-power conversion circuit in the multi-stage condensation and cleaning module control subsystem in some embodiments of the present invention. Figure 11 This is a schematic diagram of the power supply circuit of the full-bridge converter in the multi-stage condensation and cleaning module control subsystem in some embodiments of the present invention; Figure 12 This is a circuit diagram of the full-bridge converter A in the multi-stage condensation and cleaning module control subsystem in some embodiments of the present invention; Figure 13 This is a circuit diagram of the full-bridge converter B in the multi-stage condensation and cleaning module control subsystem in some embodiments of the present invention. Figure 14This is a circuit diagram of the drive circuit in the multi-stage condensation and cleaning module control subsystem in some embodiments of the present invention; Figure 15 The circuit diagrams for the processor unit and communication unit in the multi-stage condensation and cleaning module control subsystem are shown in some embodiments of the present invention. Figure 16 This is a schematic diagram of the microprocessor unit in the fume hood control module subsystem in some embodiments of the present invention; Figure 17 This is a schematic diagram of the power supply unit in the fume hood control module subsystem in some embodiments of the present invention; Figure 18 This is a schematic diagram of the solenoid valve drive circuit in the fume hood control module subsystem in some embodiments of the present invention; Figure 19 This is a schematic diagram of the RS485 bidirectional bus and logic level adaptation circuit unit in the smoke hood control module subsystem of some embodiments of the present invention. Figure 20 This is a front view of the pre-motion submodule in some embodiments of the present invention; Figure 21 This is a side view of a submodule in some embodiments of the present invention; Figure 22 This is a front view of a moving submodule in some embodiments of the present invention. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be described in detail 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.

[0022] The principles and methods of this invention will be described in detail below with reference to embodiments, taking multiple large stoves using electric heat sources as an example. Parentheses (XY) are defined as follows: X - the reference numeral, Y - the unit number within the reference numeral. Figures 20 to 22 The corresponding X is set to 20.

[0023] See Figure 1The figure shows a preferred embodiment of the present invention. The intelligent oil fume separation system includes a main controller subsystem (1-1), a multi-stage condensation and cleaning module control subsystem (1-2), a fume hood control module subsystem (1-3), a variable frequency speed control exhaust subsystem (1-4), and a terminal device (1-5). The multi-stage condensation and cleaning module control subsystem (1-2), the fume hood control module subsystem (1-3), the variable frequency speed control exhaust subsystem (1-4), and the terminal device (1-5) are all connected to the main controller subsystem (1-1). The connection can be made using RS485 two-wire bus or similar methods. The terminal device (1-5) can be a server or other external devices. External devices include one or more of mobile phones, computers, laptops, and tablets. The server can be one or more of a local server, a remote server, and a cloud server.

[0024] The exhaust system connected to the variable frequency speed control exhaust control subsystem (1-4) can be directly composed of a variable frequency speed controller, an exhaust fan, and a sensor for measuring the concentration of oil fume gas at the exhaust port. These components are all commercially available and mature products, so this invention will not elaborate on this subsystem.

[0025] The fume hood control module subsystem (1-3) connects to the stove control unit, which includes a switch that controls the power-on status of an electric stove (e.g., an induction cooker) and / or a valve on a gas stove (e.g., a gas stove) that connects to the gas source, and monitors and / or controls the stove control unit.

[0026] The following statements assume that all subsystems in the system are initially in a "dormant" state. The system will undergo a complete startup initialization process: the terminal device sends a "handshake" message to the dormant main controller subsystem, and the main controller subsystem (1-1) will transition from a dormant state to an active state. After the microprocessor in the main controller subsystem (1-1) exits the "dormant" state, it immediately performs a self-test. Regardless of whether the self-test passes or fails, the main controller subsystem (1-1) must send a response message to the server in the terminal device via the RS485 communication link within a certain period of time (this period can be set as needed). The response message contains the self-test content of the main controller subsystem (1-1). After receiving the response information, the terminal device (1-5) checks the current status of the main controller subsystem (1-1): If the information is unpacked and it is found that the main controller subsystem (1-1) has failed the self-test, maintenance work on the main controller subsystem (1-1) must be arranged; if the self-test information of the main controller subsystem (1-1) is normal, the terminal device (1-5) will always remain "operation enabled" from this moment on, and the operation of the main controller subsystem (1-1) will no longer require the terminal device (1-5) to obtain "operation enable". Granting this permission to the terminal device (1-5) is to deal with unforeseen circumstances, so that the terminal device (1-5) can directly block the operation of the entire system, that is, the terminal device (1-5) issues a stop command to the intelligent oil fume separation system to stop the overall operation of the intelligent oil fume separation system.

[0027] After the main controller subsystem (1-1) is activated, it waits for any "run request" from the fume hood control module subsystem (1-3) (the "run request" can be triggered when the stove control unit is turned on). Once it receives a "run request" containing its own self-test information from any one or more fume hood control module subsystems (1-3), the main controller subsystem (1-1) unpacks the "run request" data frame sent by the requesting fume hood control module subsystem (1-3). After identifying that the fume hood control module subsystem (1-3) is in "system normal" condition, it sends a "prepared start" command to the variable frequency speed control exhaust subsystem (1-4) and the multi-stage condensation and cleaning module subsystem (1-2), and waits for the response information from the variable frequency speed control exhaust subsystem (1-4) and the multi-stage condensation and cleaning module control subsystem (1-2). After receiving the "Ready Start" command from the main controller subsystem (1-1), the variable frequency speed control exhaust subsystem (1-4) and the multi-stage condensation and cleaning module control subsystem (1-2) switch from sleep to active state. After the self-test is normal, they send "Ready" response information to the main controller subsystem (1-1) respectively. After receiving the "Ready" response from the multi-stage condensation and cleaning module control subsystem (1-2) and the variable frequency speed control exhaust subsystem (1-4), the main controller subsystem (1-1) sends a start command to both subsystems. After a 5-second delay, waiting for both subsystems to reach a stable operating state, the main controller subsystem (1-1) sends a "Start Allowed" command to the fume hood control module subsystem (1-3). The green indicator light on the fume hood control module subsystem (1-3) illuminates, and pressing the "Start" button on the panel initiates the operation. This operational procedure ensures that all subsystems are in normal working order before operation, and the process takes approximately 5 seconds. If the main controller subsystem (1-1) receives one or more "run request" requests from the fume hood control module subsystem (1-3) nodes, and it is determined that the self-test of the "run request" data frame sent by a certain fume hood control module subsystem (1-3) node is abnormal, the main controller subsystem (1-1) will block that fume hood control module subsystem (1-3) node.

[0028] The following sections will describe each subsystem in detail: I. Main Controller Subsystem See Figure 2The main controller subsystem includes a microprocessor unit (2-1), a power supply unit (2-2), a Wi-Fi module (2-3), a temperature and humidity chip (2-4), an LCD touch screen (2-5), an oil fume concentration sensor (2-6), a four-channel RS485 communication chip (2-7), and a 12V 12-channel control output unit (2-8). Specifically, the microprocessor unit (2-1) is sequentially connected to the LCD touch screen (2-5), the four-channel RS485 communication chip (2-7), the 12V 12-channel control output unit (2-8), the Wi-Fi module (2-3), the temperature and humidity chip (2-4), and the oil fume concentration sensor (2-6); the power supply unit (2-2) provides appropriate power to the functional units, modules, chips, and sensors.

[0029] See Figure 5 The microprocessor unit (2-1) of the main controller subsystem includes the ARM Cortex4 series STM32F407 microprocessor IC3 (STM32F407) and peripheral passive components. The peripheral passive components include capacitors C17, C18, C19, C20, C21, C22, C23, and C24; resistors R3, R4, R5, R6, R7, R8, R9, R10, R11, and R12; crystal oscillators JZ1 (8MHz) and JZ2 (32.768KHz); diode D4 (SS103); miniature push-button switch K2; and power strips CZ2 and CZ3. Crystal oscillator JZ2 provides a real-time clock for microprocessor IC3 (STM32F407) to facilitate the development of calendar functions using IC3. Diode D4 (SS103), resistor R5, and a 1-farad supercapacitor form a backup power supply, ensuring that microprocessor IC3 (STM32F407) can maintain operation for 100 hours in the event of power failure (with other external operations disabled). Miniature push-button switch K2 provides a reset function, and power strip CZ2 provides a program download interface.

[0030] See Figure 6 The power supply unit (2-2) of the main controller subsystem can be composed of socket CZ1, fuse F1, surge protector varistor RY1 (14D561K), capacitors C1, C2, C3, C4, and C5, and common-mode inductor L, forming an electromagnetic interference protection network. The AC / DC conversion module IC1 (LHE20-20D512) converts the input 220V AC to a stable +5V and +12V DC power supply. To further enhance the stability of the microprocessor operation, a step-down stabilization unit can be added. The +5V stable DC power supply can be fed to the input of the linear step-down chip IC2 (LP3966) in the step-down stabilization unit, where it is further isolated from electromagnetic interference and stepped down to a clean +3.3V power output. The +12V is used for logic level conversion by the integrated comparator chip. The specific structure of the step-down stabilization unit can be as follows: Figure 7As shown. The remaining peripheral passive components of the power supply unit will not be described further.

[0031] The main controller subsystem's Wi-Fi module (2-3) can use an HF-LPT230 serial port adapter to provide mobile phones with various information about the system's operating status. The temperature and humidity chip (2-4) can be installed inside the exhaust duct to monitor temperature and humidity information within the exhaust system. The LCD touchscreen (2-5) can be a DWIN serial port touchscreen (DMG80480T070_15WTR) to provide a human-machine interface, relevant operating parameter settings, and information observation windows. The oil fume concentration sensor (2-6) can be a pollution-resistant SDS031-NP oil fume concentration sensor.

[0032] The 12V 12-channel control output unit (2-8) can be composed of three 4-unit integrated comparator chips and related peripheral passive components. Its function is to convert the 3.3V logic level output of the STM32F407 microprocessor IC3 (STM32F407) to a 12V logic level. After long-distance transmission (not exceeding 50 meters), the 12V logic level output by the main controller subsystem reaches the receiving end of the relevant subsystem and is output as a 3.3V logic level after being current-limited by resistors and clamped by Zener diodes. This satisfactorily solves the problem of limited microprocessor serial port resources during long-distance transmission.

[0033] II. Multi-stage condensation and cleaning module control subsystem See Figure 3 See Figure 3The multi-stage condensation and cleaning module control subsystem includes a processor unit (3-1), a power supply unit (3-2), a converter (3-3), a conversion unit (3-4), a communication unit (3-5), a drive unit (3-6), and a trigger unit (3-7). Among them, the processor unit (3-1) can be a microprocessor unit; the converter (3-3) can be a two-way full-bridge converter, which includes full-bridge converter A and full-bridge converter B; the conversion unit (3-4) can be a 28KHz high-frequency half-bridge power conversion unit corresponding to the 28KHz ultrasonic converter; the communication unit (3-5) can be an RS485 bidirectional information interaction unit; the trigger unit (3-7) can be an electrochemical oil fume concentration sensor; the multi-stage condensation and cleaning module control subsystem is connected to the multi-stage condensation and cleaning module. The multi-stage condensation and cleaning module adopts a multi-stage oil-gas separation design and includes several sub-modules. The sub-modules can be started as needed. Each sub-module includes a working plate (which can be a mirror stainless steel plate with the front side being the condensation surface), a high-power cleaning ultrasonic transducer array set on the condensation surface, a semiconductor cooling and heating Pellets set on the back of the working plate, a driver for controlling the operation of the high-power cleaning ultrasonic transducer array, and a mechanical transmission mechanism, etc. The high-power cleaning ultrasonic array can be a 28KHz ultrasonic converter, and the driver can be a stepper motor. Since the high-power cleaning ultrasonic transducer array, semiconductor cooling and heating Pellets, and electrochemical oil fume concentration sensor are all commercially available finished products, their principles will not be described in detail except for their connection relationship with this unit.

[0034] The multi-stage condensation and cleaning module control subsystem and the multi-stage condensation and cleaning module are tasked with separating oil molecules from the fumes generated during stove operation. To ensure effective oil-gas separation, a three-stage mirror-finished stainless steel is used as the condensation surface of the working plate to condense the oil molecules in the fumes (specifically, the three-stage mirror-finished stainless steel consists of three pieces, one on each sub-module, with each sub-module having a gap at its lower and upper sides to form a wave-shaped channel for transporting the oil-fume mixture, thus increasing the length of the transport path and facilitating better condensation and filtration). When the stove is not in use, the mirror-finished stainless steel condensation surface and its surrounding components are automatically cleaned. Utilizing the characteristic of semiconductor cooling and heating Pellets that can both cool and heat, cooling separates oil molecules during stove operation; after operation, it switches to heating to enhance the cleaning effect. A 28kHz ultrasonic transducer is used for optimal cleaning. In this embodiment, the mirror-finished stainless steel forms a 50... 2An array of five 60-watt ultrasonic cleaning transducers is evenly mounted on a horizontal support 1 cm away from the condensation surface. During cleaning, the support with the five ultrasonic transducers scans horizontally up and down along the condensation surface, constrained by a stepper motor and its related transmission mechanism. Controlling the distance between the ultrasonic cleaning array and the condensation plate being cleaned to within 1.5 cm ensures that the influence of air molecule absorption on the ultrasonic energy is negligible, achieving excellent cavitation even without water. Furthermore, due to the elastic mechanical wave properties of multiple high-power ultrasonic cleaning transducers, a dense reflection field is inevitably formed in the surrounding space, incidentally cleaning nearby objects.

[0035] See Figure 15 The processor unit (3-1) of the condensation cleaning system may include a microprocessor IC11 (STM32F405), an integrated temperature measurement chip IC14 (DS18B20), and its peripheral passive components. The peripheral passive components include: capacitors C31, C32, C33, C34, C35, C36, and C37; resistors R38, R39, R40, and R43; crystal oscillators JZ1 (8MHz) and JZ2 (32.768kHz); a miniature push-button switch KG2; a power strip CT5; and an LED indicator LED2. The miniature push-button switch KG2 provides a reset function; the power strip CT5 provides a program download interface. The integrated temperature measurement chip IC14 (DS18B20) and its peripheral passive components are used to monitor the temperature of a specific end face of the semiconductor Peltier patch. Diodes, current-limiting resistors, supercapacitors, etc. can be added to form a backup power supply, which can support the microprocessor IC11100 hours of backup power supply in the event of power failure (when other external operations are turned off).

[0036] See Figure 11 The power supply unit (3-2) may include two Mean Well switching power supplies, POW1 and POW2 (LRS350-12), and a Mean Well switching power supply, POW3 (RSP-100-24), and capacitors C15, C16, and C17. These three switching power supplies provide +12A volts 29 amps, +12B volts 29 amps, and +24V 4 amps DC regulated power supplies, respectively; the +12A volts 29 amps supplies power to full-bridge converter A, the +12B volts 29 amps supplies power to full-bridge converter B, and the +24V 4 amps supplies power to drive unit (3-6) DRV1 (DM860H). Full-bridge converter A (3-3) can be referenced... Figure 12 This includes power MOSFETs BG1, BG2, BG3, and BG4, resistors R25, R26, R27, and R28, and socket CT3. A full-bridge converter B (3-3) is available; please refer to [reference needed]. Figure 13This includes power MOSFETs BG5, BG6, BG7, and BG8, resistors R29, R30, R31, and R32, and socket CT4. The power devices in the converter (3-3) all use low-threshold, low-voltage, high-current output power MOSFETs (IRFR / U1205). The upper and lower arms of the converter can use four floating-gate power device driver chips IR2104 and four semiconductor-cooled Peltier mounts, with each pair using a full-bridge circuit for commutation control. Taking the full-bridge converter A (3-3) as an example, this describes how the microprocessor controls the converter (3-3) to switch the semiconductor Peltier patch from cooling mode to heating mode: Assume the two electrodes of the two semiconductor Peltier patches are connected to socket CT3. When power MOSFETs BG1 and BG3 are turned on and BG2 and BG4 are turned off, the +12A current flows through BG3-BP point-through the semiconductor Peltier patch to AP point-to-ground via BG3. Assume this current path makes surface A of the semiconductor Peltier patch the cooling surface. Then, control the power MOSFETs BG1 and BG3 to turn off and BG2 and BG4 to turn on. The +12A current then flows through BG2-AP point-through the semiconductor Peltier patch to BP point-to-ground via BG4. Clearly, the direction of the current applied to the semiconductor Peltier patch is reversed, thus the original cooling surface becomes the heating surface. In this way, the high-current polarity switching is successfully achieved using microelectronics technology. See also... Figure 14 The power supply unit (3-2) may also include a stable low-voltage, low-power power supply for the microprocessor (STM32F405) and related chips; a branch is taken from the +12A 29 amp output of the switching power supply POW1 as the power supply source for forming a pure 3.3V chip power supply. The +12A is fed to the input terminal of the BUCK step-down chip IC9 (TPSM82902), and after BUCK conversion, it outputs +6V. To purify the +6V, it is then output as 3.3V after passing through the linear chip IC10 (TPS736).

[0037] The aforementioned conversion unit (3-4) can be used to provide the high-frequency, high-power excitation source required to drive 15 28kHz 60W / each ultrasonic transducers. This is a special high-frequency power source, and there are no readily available finished products available. Since the 15 28kHz 60W / each ultrasonic transducers require a total of 900W of excitation source, a 1200W 28kHz high-frequency half-bridge power source was developed to leave a margin. This invention utilizes half-bridge non-isolated circuit topology conversion technology to provide a 1200W floating output high-frequency excitation source.

[0038] See Figures 8 to 10The conversion unit (3-4) may include a single-chip AC / DC converter IC1 (TOP222P), a dual-output PWM modulation chip IC2 (SG2525), a dual-channel floating gate output power device driver chip IC3 (IR2110), and passive components. Passive components include resistors numbered R1, R3 to R24, capacitors numbered C1 to C12, electrolytic capacitors numbered E1 to E13, various diodes numbered D1 to D7, optocoupler OP1 (ITV817A), high-frequency isolation transformer TI, filter and common-mode inductors L1, L2, L3, L4, fuse F1 (15A), surge protector varistor RT1, rectifier bridge RCT1 (KBJ2010), power MOSFETs M1 and M2 (MTM26N50), etc. This section is rather lengthy, so a brief description of the circuit function is provided below: The single-chip AC / DC converter IC1 (TOP222P), optocoupler OP1 (ITV817A), high-frequency isolation transformer TI, filters and common-mode inductors L1, L2, L3, and other passive components form the initial DC power supply for the half-bridge converter control chip and circuit. After connecting to 220V AC, it outputs low-power +12V, -12V, and +6V DC operating power supplies. The commonly used PWM modulation chip IC2 (SG2525) outputs two complementary PWM waves with dead-time control, which serve as input signals for the dual-channel floating-gate output power device driver chip IC3 (IR2110). This completes the two floating-gate drive PWM signals required for the half-bridge converter. Common-mode inductors L1, L2, L3, and L4, fuse F1 (15A), surge protector varistor RT1, rectifier bridge RCT1 (KBJ2010), power MOSFETs M1 and M2 (MTM26N50), and related passive components constitute a high-power high-frequency half-bridge converter. Driven by two floating-gate PWM signals, it outputs a 28kHz 1200W high-frequency power excitation source to meet the needs of the ultrasonic transducer. It is worth noting that the 28kHz 1200W high-frequency half-bridge converter (3-4) described in this invention does not employ the usual isolated output. Instead, the load FZ is directly applied to the midpoint between the connection point of the two power MOSFETs and the rectified capacitor voltage divider filter network, achieving a floating output without a high-frequency isolation transformer. This design has at least the following advantages: 1. It greatly simplifies the structure of a standard half-bridge converter; 2. It uses a high-frequency isolation transformer only in the initial DC power supply circuit, avoiding magnetic saturation problems and increasing operating life; 3. It significantly reduces size and component costs.

[0039] See Figure 15The aforementioned communication units (3-5) can be RS485 chips IC12, IC13, and IC15 (THVD1406), passive components: resistors R41, R42, R44, R45, R46, R47, R48, R49, R50, R51, and R52, capacitors C38, C39, C40, and C41, Zener diodes W2, W3, W4, and W5, and connectors CT5, CT6, and CT7, forming an RS485 long-distance bidirectional communication, 4-bit operation network. Among these, RS485 chips IC12 (THVD1406), IC13 (THVD1406), and IC15 (THVD1406) communicate with other external devices. The four-bit operation network, consisting of resistors R45 and R46, capacitor C38, and Zener diode W2, is designed for possible bit setting or other bit operations by certain auxiliary components. The network is described as follows: When a bit setting operation is required, the 12V bit operation logic signal is sent to resistor R45 and capacitor C38 via the "1" pin of connector CT8 in the condenser cleaning system. C38 filters out noise superimposed during long-distance transmission. R45 acts as a current-limiting resistor for Zener diode W2, and the Zener diode clamps the received logic signals within a certain range to a 3V logic level suitable for microprocessor processing.

[0040] The triggering units (3-7) involved in the condensation cleaning system can simply provide microprocessor sampling data and judgment, and will not be elaborated further.

[0041] III. Fume Hood Control Module Subsystem Assuming a commercial kitchen has multiple stoves with electric heating sources, when one or more stoves press the "START" button on the stove panel, the fume hood control module subsystem (1-3) is activated from its dormant state. The microprocessor unit (4-1) in the fume hood control module subsystem (1-3) quickly completes a self-test (if the self-test fails, it indicates that there is a hidden danger in the fume hood control module subsystem (1-3)). Then, the self-test information and the request to run are sent to the main controller subsystem (1-1) via the RS485 bus as a "run request". Note that the "run request" data frame contains bytes of the self-test information of the fume hood control module subsystem (1-3). After receiving and unpacking the data frame, the main controller subsystem (1-1) will determine that the fume hood control module subsystem (1-3) node is normal and will perform the following operations: 1. Start the multi-stage condensation and cleaning module control subsystem (1-2), start the oil fume concentration sensor and variable frequency speed control exhaust subsystem (1-4) and other coordinating parts, and after a short delay until the multi-stage integrated condensation module control subsystem (1-2), oil fume concentration sensor and variable frequency speed control exhaust subsystem (1-4) are running normally, after a delay of about 5 seconds, send a start permission command to the fume hood control module subsystem (1-3). The green LE on the fume hood panel of the fume hood control module subsystem (1-3) will be displayed. When the D light illuminates, pressing the start button on the hood panel of the hood control module subsystem (1-3) initiates the operation of the induction cooker. Pressing the stop button on the hood panel during operation terminates the induction cooker. This stop information is transmitted via RS485 bus to the main controller subsystem (1-1). The main controller subsystem (1-1), based on the total number of cookers requesting operation and the total number of cookers reported as stopped, and after a delay, determines whether to stop the operation of the multi-level integrated condensing module control subsystem (1-2), the variable frequency speed control exhaust subsystem (1-4), and other coordination subsystems. It also records the operating time and status information of each cooker. Simultaneously, the main controller subsystem (1-1) reports the number, status, and time of requested cookers to the terminal platform (1-5), indicating the permitted number of cookers to operate. It also sends the number of cookers started to the variable frequency speed control exhaust control subsystem (1-4) as one of the parameters for adjusting the repetition frequency of the variable frequency drive.

[0042] See Figure 4The fume hood control module subsystem connects the power supply unit (4-2) and the sensor (3). The fume hood control module subsystem may include a microprocessor unit (4-1), and an electromagnetic valve drive circuit (4-4) connected to the microprocessor unit (4-1), an RS485 bidirectional bus and logic level adapter circuit unit (4-5), a bidirectional thyristor drive unit (4-6), a function control button circuit (4-7), and other control units (4-8). Among them, the sensor (3) may be a temperature sensor and / or an infrared sensor (specifically, a long-range infrared temperature sensor may be used, with the following specifications: measurement distance 1.5 meters, and upper limit of measurement temperature 1200℃). These sensors are installed on the stove and can be used to monitor whether a fire has occurred in the stove. Other control units (4-8) may be used to control the OLED display screen, fire extinguishing devices (such as: a solenoid valve, a device for releasing compressed carbon dioxide fire extinguishing gas, or a sprinkler device, depending on the heat source used by the stove), alarm devices, etc. See Figure 16 The microprocessor unit (4-1) of the fume hood control module subsystem includes a microprocessor IC3 (STM32F103) and its peripheral passive components. The peripheral passive components include capacitors C9, C10, C12, C13, C14, and C15; resistors R6, R7, R8, R9, R14, R15, R26, R27, and R28; a power strip CT2; a button K1; a diode D2; and a light-emitting diode LED2. The microprocessor-assisted peripheral passive components provide functions such as program downloading, reset, backup battery, and operation indication for the microprocessor.

[0043] See Figure 17 The power supply unit (4-2) of the fume hood control module subsystem includes socket CT1, fuse F1 (3.15A), AC / DC power module POW1 (LD6023B24R), BUCK step-down chip IC1 (LMR51420X), linear regulator chip IC2 (LM3940IMP), and passive components. Passive components include capacitors C1, C2, C3, C4, C5, C6, C7, and C8; resistors R1, R2, R3, R4, and R5; transient suppression diode D1 (SMBJ40A); and electrolytic capacitor ED1. The AC / DC power module POW1 (LD6023B24R) converts the input 220V public grid to +24V DC power. The +24V DC power is output in two paths: one is used as the input power for the BUCK step-down chip IC1 (LMR51420X), and the other is used to drive the solenoid valve.

[0044] See Figure 18The solenoid valve drive circuit of the fume hood control module subsystem may include Omron miniature solid-state relays SSR1 and SSR2 (JGX-5AF), and resistors R10, R11, R12, and R13. R11 and R13 can be series-connected solenoid valve windings. When a fire is detected and determined to occur, one set of solenoid valve drivers directly cuts off the gas supply to the stove (if a gas supply is used), while the other set releases carbon dioxide (or activates the sprinkler system). When an electric heating source is used and a fire occurs, the power supply is cut off based on the following principle: When the data fed from the far-field infrared temperature sensor (4-3) to the microprocessor IC3 (STM32F103) indicates a fire, the microprocessor IC3 (STM32F103) issues a "SIG" signal. This signal is fed to the optocoupler OP1 (4N25). The secondary side of the optocoupler OP1 (4N25) is powered by an independent 3.3V power supply with reference point isolation, which can be connected to the reference point of any load. The optocoupler OP1 (4N25) outputs an isolated trigger signal "TIG" to trigger the power electronic switch chip IC6 (TWH8778). The power electronic switch chip IC6 (TWH8778) outputs a turn-off signal to the bidirectional thyristor in the power supply of the high-power induction cooker through the socket, thus cutting off the power to the high-power induction cooker.

[0045] See Figure 19 The RS485 bidirectional bus and logic level adapter circuit unit (4-5) of the fume hood control module subsystem includes RS485 communication chips IC4 and IC5 (THVD1406), resistors R16, R17, R18, R19, R20, R21, R22, R23, R24, and R25, capacitors C16, C17, C18, and C19, and connectors CT3 and CT4. Its function is to provide bidirectional long-distance data transmission and bit setting operations.

[0046] The aforementioned OLED display can be used with the microprocessor IC3 (STM32F103) I 2 C interface connection.

[0047] The submodule is installed inside the smoke exhaust duct; its structure can be found in [reference needed]. Figure 20 and Figure 21 To highlight the state of the ultrasonic cleaning transducer array before and after operation, an additional... Figure 20This indicates the position of the ultrasonic transducer array before the cleaning operation. The submodule may include a stepper motor (20-1), a protective cover (20-2), a cooling water inlet (20-3), a guide rod (20-4), an ultrasonic transducer (20-5), a semiconductor PEL patch (20-6), a working plate (20-7), a cooling water outlet (20-8), a cleaning water supply hose (20-9), a drive screw (20-10), and a stainless steel cooling water tank (20-11). The stepper motor (20-1) drives the ultrasonic transducer (20-5) and the cleaning water supply hose (20-9) to move vertically via the drive screw (20-10) to perform a scanning cleaning operation on the end face (i.e., the condensation surface) of the working plate (20-7) where condensation occurs.

[0048] One side of the working plate (20-7) faces the direction of the oil fume movement, while four semiconductor Peltier pads (20-6) are evenly and tightly attached to its reverse side. In cooling mode, the cold side of the semiconductor Peltier pads (20-6) is in close contact with the mirrored stainless steel plate, and the hot side is in close contact with the stainless steel cooling water tank (20-11). Cooling water flows into the stainless steel water tank (20-11) from the cooling inlet (20-3) and flows out of the stainless steel water tank (20-11) from the cooling outlet (20-8), providing a good heat dissipation environment for the semiconductor Peltier pads. Assuming a summer room temperature of 32℃ and a winter room temperature of 12℃, and using a semiconductor Peltier patch (20-6) with a temperature difference of -65℃ between the cold and hot sides, and assuming the circulating water temperature entering the cooling water inlet (20-3) is 32℃, the temperature of the cooling water bath in close contact with the hot side of the semiconductor Peltier patch is approximately between 35-38℃. At this time, the temperature of the cold side of the semiconductor Peltier patch is between -30℃ and -28℃, which is sufficient to condense the oil molecules in the fumes. Based on the above estimation, there is no need to worry about the condensation effect of the semiconductor Peltier patch in winter.

[0049] During the cleaning process, the polarity of the power supply applied to the semiconductor Pel patch (20-6) is reversed. At this time, the condensation surface of the semiconductor Pel patch is transformed into the heating surface, which is more conducive to oil separation. Cleaning water containing an oil separator (such as White Cat cleaning solution) can also be introduced from the cleaning water supply hose (20-9). If hot water is introduced, the cleaning effect will be the best.

[0050] After the cleaning operation is completed, the bracket with the ultrasonic transducer (20-5) installed will be returned to the protective cover (20-2).

[0051] The function of the aforementioned guide rod (20-4) is to constrain the movement of the support on which the ultrasonic transducer (20-5) array is mounted.

[0052] The above-mentioned hot water will provide the best cleaning effect.

[0053] After the cleaning operation is completed, the bracket with the ultrasonic transducer (8-5) installed will be returned to the protective cover (8-2).

[0054] Appendix Figure 8 Appendix Figure 9 The function of the middle guide rod (8-4) is to constrain the movement of the support on which the ultrasonic transducer (8-5) array is installed.

[0055] The aforementioned external devices can also be directly connected to the server.

[0056] All of the above-mentioned undisclosed matters can be implemented using existing technologies, so they will not be elaborated here.

[0057] Finally, it should be noted that in the description of this invention, the terms "vertical," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0058] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set", "install", "connect", and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0059] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present invention, and all such deductions or substitutions should be considered to fall within the scope of protection defined by the claims submitted herein.

Claims

1. An intelligent oil fume separation system, characterized in that: It includes a main controller subsystem and a multi-stage condensation and cleaning module control subsystem. The multi-stage condensation and cleaning module control subsystem is connected to the main controller subsystem. The main controller subsystem is used to coordinate and control the operation of other subsystems connected to it; The multi-stage condensation and cleaning module control subsystem is connected to the multi-stage condensation and cleaning module. The multi-stage condensation and cleaning module adopts a multi-stage oil-gas separation design and includes several sub-modules. The sub-modules can be started as needed. Each sub-module is equipped with a condensation surface and a cleaning component. The condensation surface separates oil molecules and impurities in thermal motion from the oil fume mixture by condensation. The cleaning component is set corresponding to the condensation surface and is used to clean the condensation surface.

2. The intelligent oil fume separation system according to claim 1, characterized in that: The submodule includes a temperature control component connected to the condensing surface. The temperature control component is used to reduce the temperature of the condensing surface and can also increase the temperature of the condensing surface. The cleaning assembly includes an ultrasonic cleaning array that performs scanning cleaning on the corresponding condensation surface, and the ultrasonic cleaning array includes an ultrasonic transducer.

3. The intelligent oil fume separation system according to claim 2, characterized in that: The temperature control component includes a semiconductor Peltier cooler, and a converter is set in the multi-stage condensation and cleaning module control subsystem corresponding to the semiconductor Peltier cooler. The converter is a full-bridge converter. The control subsystem of the multi-stage condensation and cleaning module is equipped with a conversion circuit for the ultrasonic transducer, and the conversion circuit is a floating output conversion circuit.

4. The intelligent oil fume separation system according to claim 3, characterized in that: The suspended output conversion circuit is a half-bridge conversion circuit or a full-bridge conversion circuit. The power required by the suspended output conversion circuit corresponds to the power required by the excitation source of the ultrasonic transducer array. The repetition frequency of the suspended output conversion circuit is set to be the same as the resonant frequency of the ultrasonic transducer. The distance from the ultrasonic transducer to the condensation surface is less than or equal to 1.5 cm.

5. The intelligent oil fume separation system according to claim 4, characterized in that, The specific structure of the half-bridge converter circuit is as follows: A half-bridge converter circuit includes an auxiliary power supply converter circuit, a modulation circuit, and a high-power converter circuit connected in series. The auxiliary power supply conversion circuit includes a single-chip AC / DC converter, resistors, optocouplers, diodes, a high-frequency isolation transformer, filters, and a common-mode inductor, which provide the initial power supply for the chips involved in the half-bridge converter circuit. The modulation circuit includes a dual-channel PWM modulation chip, a dual-channel floating gate output power device driver chip, resistors, capacitors, and diodes. The PWM modulation chip outputs two complementary PWM waves with dead-time control, which serve as drive input signals for the power devices of the half-bridge converter circuit. The high-power conversion circuit includes filters and common-mode inductors, fuses, lightning protection varistors, rectifier bridges, and power MOSFETs. The high-power conversion circuit is used to output a high-frequency power excitation source driven by two complementary PWM signals. In the half-bridge conversion circuit, the load is directly applied to the midpoint between the connection point of the two power MOSFETs and the voltage divider filter network after rectification, thus achieving floating output.

6. The intelligent oil fume separation system according to any one of claims 1-4, characterized in that, The intelligent oil fume separation system includes at least one oil fume concentration sensor. The multi-stage condensation and cleaning module and the oil fume concentration sensor are both installed in the exhaust duct. The oil fume concentration sensor is connected to the main controller subsystem. The oil fume concentration sensor is used to detect the oil fume concentration in the flue. At least one oil fume concentration sensor is located in front of the multi-stage condensation and cleaning module.

7. The intelligent oil fume separation system according to claim 6, characterized in that, The intelligent oil fume separation system includes a variable frequency speed regulation exhaust control subsystem connected to the main controller subsystem, which controls the exhaust rate of the exhaust system. The main controller subsystem connects to terminal devices, which include servers and other external devices, including one or more of mobile phones, computers, and tablets.

8. The intelligent oil fume separation system according to claim 7, characterized in that, The main controller subsystem also has a fume hood control module subsystem connected to the main controller subsystem. The fume hood control module subsystem has one or more of the following functions: The stove control unit includes a switch that controls the power-on status of the electric stove and / or a valve on the gas stove that connects to the gas source, and monitors and / or controls the stove control unit. Connect the fire extinguishing device and control its operating status. Connect to the alarm device and control its operating status; The stove is equipped with a temperature sensor and / or an infrared sensor.

9. A method for implementing an intelligent oil fume separation system, characterized in that, The method of implementing the intelligent oil fume molecular system according to any one of claims 1-8 includes the following steps: Real-time monitoring of the number of stoves in operation and the concentration of oil fumes in the exhaust duct; According to preset rules, control commands are issued to other subsystems connected to the main controller subsystem to control the operation of each subsystem.

10. The method for implementing the intelligent oil fume separation system according to claim 9, characterized in that, Before real-time monitoring of the number of stoves in operation and the concentration of cooking fumes in the exhaust duct, the following steps are also included: Activate the main controller subsystem; Self-inspection generates self-inspection information; The system analyzes and judges the self-inspection information to determine whether the self-inspection is passed. If it is passed, the intelligent oil fume molecule system is activated to monitor the number of stoves that are turned on and the concentration of oil fumes in the exhaust duct in real time. If it fails, the intelligent oil fume molecule system is not activated and a maintenance command is issued. The main controller subsystem uploads self-test information, monitored data, and generated control and maintenance commands to the server to create logs, which can be retrieved and viewed by other external devices.

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