A centralized exhaust type oil fume purification system and control method

Abstract

The present invention discloses a centralized exhaust type oil fume purification system and control method, wherein the oil fume purification system includes a common flue, a main unit arranged at the top of the common flue, and range hoods installed on different floors, wherein the range hoods on different floors are respectively connected to the common flue. The system also includes: a fan assembly, which is arranged on the main unit; a heater, which is arranged at the air inlet end of the fan assembly, and is respectively provided with a VOCs sensor and a first ozone sensor at an end of the heater away from the fan assembly, and a second ozone sensor at an end of the heater close to the fan assembly; a plurality of ultraviolet lamps, which are respectively arranged on the range hoods; and a master controller, which is electrically connected to the VOCs sensor, the first ozone sensor, the heater, the second ozone sensor, and the ultraviolet lamp assembly. The system has a simple structure and can enable the ozone generated by the ultraviolet lamps to fully react with VOCs in the oil fume in the common flue, thereby effectively removing the VOCs.

Description

Technical Field

[0001] The present invention relates to the technical field of public flue smoke exhaust technology, and in particular to a centralized exhaust type oil fume purification system and a control method. Background Art

[0002] In recent years, the concept of a "centralized exhaust system for oil fumes from public flues in buildings" has emerged. It generates additional power by placing a fan at the top of the public flue, and the oil fume is discharged into the atmosphere after purification, which can effectively protect the environment.

[0003] Currently, there are two purification technologies for VOCs in oil smoke: filtration and chemical methods. The purification device is usually located at the main unit on the roof. However, the space of the main unit on the roof is limited and the flow rate is high, which cannot effectively remove VOCs, affecting the purification effect of the entire system. Summary of the Invention

[0004] The present invention aims to solve, at least to a certain extent, one of the problems existing in the existing related technologies. To this end, the present invention proposes a centralized exhaust type oil fume purification system with a simple structure, which can enable the ozone generated by the ultraviolet lamp to fully react with the VOCs in the oil fume in the public flue, thereby effectively removing the VOCs.

[0005] In addition, the present invention also proposes a control method for a centralized exhaust type oil fume purification system, which is simple and feasible, and can dynamically adjust the number of ultraviolet lamps on different floors to be turned on and off, thereby reducing the operating energy consumption of the entire oil fume purification system.

[0006] The first objective is achieved through the following technical solutions:

[0007] A centralized exhaust type oil fume purification system comprises a common flue, a main unit arranged at the top of the common flue, and range hoods installed on different floors, wherein the range hoods on different floors are respectively connected to the common flue, and further comprises:

[0008] A fan assembly, wherein the fan assembly is arranged on the host;

[0009] A heater, the heater being arranged at the air inlet end of the fan assembly, the heater being respectively provided with a VOCs sensor and a first ozone sensor at one end away from the fan assembly, and a second ozone sensor at one end of the heater being provided close to the fan assembly;

[0010] a plurality of ultraviolet lamps, wherein the plurality of ultraviolet lamps are respectively arranged on the range hood;

[0011] A main controller is electrically connected to the VOCs sensor, the first ozone sensor, the heater, the second ozone sensor, and the ultraviolet lamp assembly respectively.

[0012] In some embodiments, a purification assembly is further included, and the purification assembly is disposed on an end of the heater away from the fan assembly.

[0013] In some embodiments, the purification assembly includes at least one carbon cloth member, and the carbon cloth member is located between the heater and the VOCs sensor.

[0014] In some embodiments, an electric valve is further included, which is arranged at a communication position between the common flue and the range hood, and is electrically connected to the main controller.

[0015] In some embodiments, the electric valve includes a valve plate and a drive motor, wherein the valve plate is disposed on the drive motor, and the drive motor is electrically connected to the master controller.

[0016] In some embodiments, the range hood includes an oil fume detection component and a range hood body, wherein the oil fume detection component is disposed in the range hood body to be suitable for detecting the oil fume concentration at the range hood.

[0017] In some embodiments, the oil fume detection component includes a light source transmitter and a light source receiver that are arranged correspondingly, wherein a fan device is arranged in the range hood body, the light source transmitter and the light source receiver are respectively on both sides of the fan device, and the fan device, the light source transmitter, and the light source receiver are respectively electrically connected to the main controller.

[0018] The second objective is achieved through the following technical solutions:

[0019] A control method for a centralized exhaust type oil fume purification system is applied to the centralized exhaust type oil fume purification system as described in any of the above embodiments, and the control method comprises the following steps:

[0020] Obtaining the current oil smoke concentration value of each range hood in a working state, obtaining the corresponding concentration level according to the oil smoke concentration value, and adjusting the working parameters of the ultraviolet lamp;

[0021] Obtaining the startup rate of the range hood;

[0022] comparing the start-up rate of the range hood with a preset start-up condition, and adjusting the operating parameters of the fan assembly and / or the ultraviolet lamp according to the comparison result;

[0023] Get the VOCs value of oil smoke;

[0024] Comparing the VOCs value with a preset VOCs value, and adjusting the operating parameters of the ultraviolet lamp according to the comparison result;

[0025] Starting the first ozone sensor to detect the ozone concentration value to obtain a first ozone concentration value;

[0026] The first ozone concentration value is compared with a preset ozone concentration value, and the operating parameters of the heater are adjusted according to the comparison result.

[0027] In some embodiments, the step of obtaining the corresponding concentration level according to the oil smoke concentration value and adjusting the operating parameters of the ultraviolet lamp includes:

[0028] The oil fume concentration value is pre-set into multiple concentration levels from low to high, and the number of the multiple ultraviolet lamps is set corresponding to the multiple concentration levels. According to the height of the oil fume concentration value corresponding to the concentration level, the number of ultraviolet lamps turned on is adjusted in sequence.

[0029] In some embodiments, the step of comparing the start-up rate of the range hood with a preset start-up condition and adjusting the operating parameters of the fan assembly and / or the ultraviolet lamp according to the comparison result includes:

[0030] The range hood startup rate is pre-set with a plurality of preset startup conditions in ascending order, and the fan assembly working gear is pre-set with a plurality of gears in ascending order, the plurality of gears being set corresponding to the plurality of preset startup conditions;

[0031] According to the preset power-on conditions reached by the power-on rate of the range hood, the fan assembly is controlled to work according to its corresponding gear, and the number of ultraviolet lamps turned on is readjusted again according to the current oil smoke concentration value of the range hood.

[0032] In some embodiments, the step of comparing the VOCs value with a preset VOCs value and adjusting the operating parameters of the ultraviolet lamp according to the comparison result includes:

[0033] Determining whether the VOCs value exceeds the preset VOCs value;

[0034] If so, controlling the range hoods in the working state to increase the number of the ultraviolet lamps turned on until all the ultraviolet lamps on the range hoods in the working state are turned on;

[0035] If not, the currently turned-on number of the ultraviolet lamps is maintained.

[0036] In some embodiments, the step of comparing the first ozone concentration value with a preset ozone concentration value and adjusting the operating parameters of the heater according to the comparison result includes:

[0037] determining whether the first ozone concentration value exceeds the preset ozone concentration value;

[0038] If so, controlling the heater to perform heating;

[0039] If not, the heater is not activated.

[0040] In some embodiments, the step of controlling the heater to perform heating includes:

[0041] Starting the second ozone sensor to detect the ozone concentration value to obtain a second ozone concentration value;

[0042] determining whether the second ozone concentration value exceeds the preset ozone concentration value;

[0043] If so, controlling the heater to continue heating;

[0044] If not, the heater is turned off.

[0045] Compared with the prior art, the present invention has at least the following beneficial effects:

[0046] 1. The centralized exhaust type oil fume purification system of the present invention has a simple structure and can make the ozone generated by the ultraviolet lamp fully react with the VOCs in the oil fume in the public flue, thereby effectively removing VOCs.

[0047] 2. The control method of the centralized exhaust type oil fume purification system of the present invention is simple and feasible, and can dynamically adjust the number of ultraviolet lamps on different floors to be turned on and off, thereby reducing the operating energy consumption of the entire oil fume purification system. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 Schematic diagram of the structure of the oil fume purification system in an embodiment of the present invention;

[0049] Figure 2 is a cross-sectional view of a range hood according to an embodiment of the present invention;

[0050] Figure 3 It is a flow chart of the oil fume purification system control method in an embodiment of the present invention. DETAILED DESCRIPTION

[0051] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of the technical solutions claimed by the present invention.

[0052] Example 1:

[0053] like Figure 1 and 2 As shown, this embodiment provides a centralized exhaust type oil fume purification system, comprising a common flue 1, a main unit 2 arranged at the top of the common flue 1, and range hoods 3 installed on different floors, wherein the range hoods 3 on different floors are respectively connected to the common flue 1, and further comprising:

[0054] The fan assembly 4 is provided on the host machine 2;

[0055] Heater 5, heater 5 is arranged at the air inlet end of fan assembly 4, and a VOCs sensor 51 and a first ozone sensor 52 are respectively arranged at the end of heater 5 away from fan assembly 4, and a second ozone sensor 53 is arranged at the end of heater 5 close to fan assembly 4;

[0056] A plurality of ultraviolet lamps 6, wherein the plurality of ultraviolet lamps 6 are respectively arranged on the range hood 3;

[0057] The main controller is electrically connected to the VOCs sensor 51, the first ozone sensor 52, the heater 5, the second ozone sensor 53, and the ultraviolet lamp 6 components respectively.

[0058] In this embodiment, the range hoods 3 on different floors are respectively connected to the common flue 1 so that each range hood 3 is respectively connected to the common flue 1. The main controller includes a host 2 control module and a host 2 communication module provided on the host 2, and the two are electrically connected. Of course, the main controller also includes a range hood control module and a range hood communication module provided on the range hood 3, and the two are electrically connected. The host 2 communication module is signal-connected to each range hood communication module so that the host 2 is respectively connected to the range hoods 3 on different floors, thereby enabling communication between the host 2 and the range hoods 3 on different floors to be communicated through the host 2 communication module. The network constructed by the range hood communication module and the range hood communication module exchanges information, and by detecting the current actual exhaust concentration of each range hood 3 in working state, different numbers of ultraviolet lamps 6 are turned on in a targeted manner. The ozone generated by the ultraviolet lamps 6 fully reacts with the VOCs in the oil fume in the public flue 1, thereby effectively removing the VOCs in the oil fume. Then, through the coordinated work of the VOCs sensor 51, the first ozone sensor 52 and the second ozone sensor 53 on the roof, the number of ultraviolet lamps 6 turned on in the entire system is adjusted, thereby reducing the energy consumption of the oil fume purification system and improving the practicality of the oil fume purification system.

[0059] Furthermore, a purification component 7 is included. The purification component 7 is arranged on the end of the heater 5 away from the fan component 4. Its structure is simple and compact, which can be beneficial to purifying the oil smoke flowing through.

[0060] Preferably, the purification component 7 includes at least one carbon cloth component, which is located in the middle of the heater 5 and the VOCs sensor 51. Its design is reasonable and can effectively improve the purification effect of oil smoke.

[0061] In this embodiment, the purification assembly 7 includes at least one carbon cloth member, which is arranged at the top of the common flue 1 and on the end of the heater 5 away from the fan assembly 4, so that the carbon cloth member is located in the middle position between the heater 5 and the VOCs sensor 51, and / or the carbon cloth member is located in the middle position between the heater 5 and the first ozone sensor 52, so that the first ozone sensor 52 detects the oil fume ozone concentration value at the front end of the heater 5. The control module of the host 2 controls the operating state of the heater 5 based on the oil fume ozone concentration value detected by the first ozone sensor 52, and then the second ozone sensor 53 detects the oil fume ozone concentration value at the rear end of the heater 5, that is, the second ozone sensor 53 detects the oil fume ozone concentration value after being heated by the heater 5, and controls the operating state of the heater 5 based on the ozone concentration value detected by the second ozone sensor 53. When the concentration detected by the ozone detection module at the front end of the heater plate exceeds a preset ozone concentration value, heater 5 is activated and the heating temperature of heater 5 is adjusted according to the degree to which the concentration exceeds the preset ozone concentration value. The higher the ozone concentration exceeds the preset ozone concentration value, the higher the temperature is, thereby ensuring that the ozone concentration detected by the second ozone sensor 53 at the rear end of heater 5 always remains below the preset ozone concentration value. More preferably, the maximum heating temperature of heater 5 is set to no more than 150°C. In addition, in this embodiment, heater 5 is preferably made of a honeycomb heating plate, but is not limited to the above heating structure. Other more suitable heating structures can also be selected according to actual needs.

[0062] In this embodiment, the number of the multiple ultraviolet lamps 6 is preferably set to four, but is not limited to the above number, and can also be set to other appropriate numbers according to actual needs. In this embodiment, the number of ultraviolet lamps 6 is described as four as an example, and other numbers are not repeated. Specifically, the multiple ultraviolet lamps 6 include a first ultraviolet lamp, a second ultraviolet lamp, a third ultraviolet lamp and a fourth ultraviolet lamp, wherein the first ultraviolet lamp, the second ultraviolet lamp, the third ultraviolet lamp and the fourth ultraviolet lamp are respectively arranged on the range hood 3 and are respectively electrically connected to the main controller, which can facilitate turning on a corresponding number of ultraviolet lamps according to different oil fume concentrations.

[0063] In this embodiment, the range hood 3 has a shell, in which a first ultraviolet lamp, a second ultraviolet lamp, a third ultraviolet lamp and a fourth ultraviolet lamp are respectively arranged at intervals. The first ultraviolet lamp, the second ultraviolet lamp, the third ultraviolet lamp and the fourth ultraviolet lamp are respectively arranged on the range hood 3 and are respectively electrically connected to the main controller, so that the range hood control module controls the opening and closing of the first ultraviolet lamp, the second ultraviolet lamp, the third ultraviolet lamp and the fourth ultraviolet lamp respectively. The range hood 3 transmits the number of ultraviolet lamps 6 that are turned on and the oil fume concentration to the host 2 through the electric valve 8. The host 2 counts the start-up rate of the range hoods 3 in the entire public flue 1, and records the oil fume concentration of each range hood 3 and the number of ultraviolet lamps 6 that are turned on.

[0064] Furthermore, it also includes an electric valve 8, which is arranged at the communication position between the public flue 1 and the range hood 3, and the electric valve 8 is electrically connected to the main controller.

[0065] Preferably, the electric valve 8 includes a valve plate and a drive motor, wherein the valve plate is arranged on the drive motor, and the drive motor is electrically connected to the main controller.

[0066] In this embodiment, the drive motor for the electric valve 8 is located at the connection point between the common flue 1 and each range hood 3. A valve plate is installed at the output end of the drive motor. The range hoods 3 and the electric valve 8 communicate via wired or wireless means, thereby enabling each range hood 3 to form a network with the main unit 2 through its corresponding electric valve 8, thereby achieving wireless or wired communication. When the range hood 3 is turned on, its corresponding electric valve 8 simultaneously opens to its maximum angle, establishing a connection between the common flue 1 and the range hood 3. When the range hood 3 is not turned on, the electric valve 8 remains sealed, isolating the connection between the common flue 1 and the range hood 3.

[0067] Specifically, the range hood 3 includes an oil fume detection component 9 and a range hood body 31 , wherein the oil fume detection component 9 is disposed in the range hood body 31 to be suitable for detecting the oil fume concentration at the range hood 3 .

[0068] In particular, the oil fume detection component 9 includes a corresponding light source transmitter 91 and a light source receiver 92, wherein a fan device 32 is arranged in the range hood body 31, and the light source transmitter 91 and the light source receiver 92 are respectively on both sides of the fan device 32, and the fan device 32, the light source transmitter 91, and the light source receiver 92 are respectively electrically connected to the main controller.

[0069] In this embodiment, a fan device 32 is provided inside the housing of the range hood 3. The motor used by the fan device 32 is a DC motor, but is not limited to a DC motor. Other more suitable motor components can also be selected according to actual needs. The oil smoke detection component 9 is installed inside the housing of the range hood 3. The light source transmitter 91 and the light source receiver 92 are respectively located at the two ends of the fan device 32 and at the lower end of the air inlet of the fan device 32. The light source transmitter 91 and the light source receiver 92 are fixed on the same horizontal line and are arranged in a corresponding manner. The oil smoke detection component 9 is opened and closed synchronously with the range hood 3. By controlling the light source transmitter 91 to emit light to the light source receiver 92, the emitted light source detects the oil smoke concentration of the oil smoke flowing through.

[0070] Example 2:

[0071] like Figure 3As shown, this embodiment provides a control method for a centralized exhaust type oil fume purification system, which is applied to the centralized exhaust type oil fume purification system as described in any one of the first embodiments, so that the host computer and the range hoods on different floors can exchange information through the network constructed by the host communication module and the range hood communication module. The actual exhaust concentration of each range hood in the working state is detected by the oil fume detection component, and different numbers of ultraviolet lamps are turned on in a targeted manner. The ozone generated by the ultraviolet lamps fully reacts with the VOCs in the oil fume in the public flue, thereby effectively removing the VOCs in the oil fume. Then, the VOCs sensor, the first ozone sensor and the second ozone sensor on the roof work together to adjust the number of ultraviolet lamps turned on in the entire system, thereby reducing the energy consumption of the oil fume purification system and improving the practicality of the oil fume purification system. The method is simple and feasible, and can dynamically adjust the number of ultraviolet lamps on and off on different floors, thereby reducing the operating energy consumption of the entire oil fume purification system.

[0072] The control method of the centralized exhaust type oil fume purification system in this embodiment specifically includes the following steps:

[0073] Step S101 , obtaining the current oil smoke concentration value of each range hood in the working state, obtaining the corresponding concentration level according to the oil smoke concentration value, and adjusting the working parameters of the ultraviolet lamp.

[0074] In this embodiment, the user operates the range hood at a certain gear to put the range hood into working state. For each range hood in working state, the main controller controls the oil fume detection component on each range hood in working state to start synchronously. The oil fume detection component detects the oil fume discharged from the range hood, thereby obtaining the current oil fume concentration value of each range hood in working state. The oil fume concentration value is pre-set with multiple concentration levels from low to high, and the number of the multiple ultraviolet lamps is set corresponding to the multiple concentration levels. According to the high and low concentration levels corresponding to the oil fume concentration value, the number of ultraviolet lamps turned on is adjusted in sequence.

[0075] More preferably, the oil smoke concentration value is pre-set to four concentration levels from low to high, but this number is not limited to the above number. Other more appropriate numbers of concentration levels can be selected based on actual needs. In this embodiment, the number of concentration levels is described as four, and other numbers are not repeated. Specifically, the four concentration levels are set as level one, level two, level three, and level four from low to high. Similarly, based on the set concentration levels, the number of ultraviolet lamps is preferably pre-set to four, but this number is not limited to the above number. Other more appropriate numbers of ultraviolet lamps can be selected based on actual needs. In this embodiment, the number of ultraviolet lamps is described as four, and other numbers are not repeated. Specifically, the ultraviolet lamps include a first ultraviolet lamp, a second ultraviolet lamp, a third ultraviolet lamp, and a fourth ultraviolet lamp.

[0076] In this embodiment, if the concentration level corresponding to the oil smoke concentration value is level one, then one ultraviolet lamp, that is, the first ultraviolet lamp, is turned on;

[0077] If the concentration level corresponding to the oil smoke concentration value is level 2, two ultraviolet lamps are turned on, that is, the first ultraviolet lamp and the second ultraviolet lamp are turned on at the same time;

[0078] If the concentration level corresponding to the oil smoke concentration value is level three, then three ultraviolet lamps are turned on, that is, the first ultraviolet lamp, the second ultraviolet lamp and the third ultraviolet lamp are turned on at the same time;

[0079] If the concentration level corresponding to the oil smoke concentration value is level four, four ultraviolet lamps are turned on, that is, the first ultraviolet lamp, the second ultraviolet lamp, the third ultraviolet lamp and the fourth ultraviolet lamp are turned on at the same time.

[0080] Step S102: obtaining the startup rate of the range hood.

[0081] In this embodiment, the electric valve is communicatively connected to the host, and the host counts the number of range hoods in working condition on the current public flue, and thereby calculates the startup rate based on the number of range hoods currently in working condition and the total number of range hoods on the entire public flue.

[0082] Step S103 : comparing the start-up rate of the range hood with a preset start-up condition, and adjusting the operating parameters of the fan assembly and / or the ultraviolet lamp according to the comparison result.

[0083] In this embodiment, the range hood startup rate is pre-set with a plurality of preset startup conditions in ascending order, and the fan assembly working gear is pre-set with a plurality of gears in ascending order, the plurality of gears being set corresponding to the plurality of preset startup conditions.

[0084] According to the preset power-on conditions reached by the power-on rate of the range hood, the fan assembly is controlled to work according to its corresponding gear, and the number of ultraviolet lamps turned on is readjusted again according to the current oil smoke concentration value of the range hood.

[0085] More preferably, the range hood startup rate is pre-set with six preset startup conditions in order from low to high, but the number is not limited to the above number. Other more appropriate numbers of preset startup conditions can be selected according to actual needs. In this embodiment, the number of preset startup conditions is described as six examples, and other numbers are not repeated. Specifically, the six preset startup conditions are 0% to 10%, 11% to 20%, 21% to 30%, 31% to 40%, 41% to 50%, and 51% to 60%. Similarly, according to the set preset startup conditions, the working gear of the fan assembly is pre-set with five gears in order from low to high, but the number is not limited to the above number. Other more appropriate numbers of gears can be selected according to actual needs. In this embodiment, the number of gears is described as five examples, and other numbers are not repeated. Specifically, the five gears are the first gear, the second gear, the third gear, the fourth gear, and the fifth gear.

[0086] In this embodiment, if the range hood's on-state rate reaches a preset first on-state condition, i.e., the on-state rate reaches 0% to 10%, the fan assembly is not started, and the number of UV lamps turned on is not readjusted, i.e., the current number of UV lamps turned on is maintained;

[0087] If the range hood's power-on rate reaches the preset second power-on condition, that is, when the power-on rate reaches 11% to 20%, the fan assembly is controlled to operate according to the preset first gear, and the number of ultraviolet lamps turned on is readjusted according to the current oil smoke concentration value of the range hood;

[0088] If the range hood's power-on rate reaches the preset third power-on condition, that is, when the power-on rate reaches 21% to 30%, the fan assembly is controlled to operate according to the preset second gear, and the number of ultraviolet lamps turned on is readjusted again according to the current oil smoke concentration value of the range hood;

[0089] If the range hood's power-on rate reaches the preset fourth power-on condition, that is, when the power-on rate reaches 31% to 40%, the fan assembly is controlled to operate according to the preset third gear, and the number of ultraviolet lamps turned on is readjusted according to the current oil smoke concentration value of the range hood;

[0090] If the range hood's power-on rate reaches the preset fifth power-on condition, that is, when the power-on rate reaches 41% to 50%, the fan assembly is controlled to work according to the preset fourth gear, and the number of UV lamps turned on is readjusted according to the current oil smoke concentration value of the range hood;

[0091] If the power-on rate of the range hood reaches the preset sixth power-on condition, that is, when the power-on rate reaches 51% to 60%, the fan component is controlled to work according to the preset fifth gear, and the number of ultraviolet lamps turned on is readjusted again according to the current oil smoke concentration value of the range hood.

[0092] Step S104: obtaining the VOCs value of the oil smoke.

[0093] Step S105 , comparing the VOCs value with a preset VOCs value, and adjusting the operating parameters of the ultraviolet lamp according to the comparison result.

[0094] In this embodiment, after maintaining the current number of UV lamps turned on or re-adjusting the number of UV lamps turned on, it is determined whether the VOCs value exceeds the preset VOCs value;

[0095] If so, the range hood in working state is controlled to turn on the next UV lamp, thereby increasing the number of UV lamps turned on. Then, when the VOCs value still exceeds the preset VOCs value, the host notifies the range hood with two UV lamps turned on to turn on the next UV lamp, and so on until all UV lamps are turned on, that is, until all UV lamps on the range hoods in working state are turned on.

[0096] If not, the current number of UV lamps turned on is maintained.

[0097] In this embodiment, after the number of ultraviolet lamps turned on is readjusted again according to the current oil fume concentration value of the range hood, that is, after the number of ultraviolet lamps turned on is adjusted, if the VOCs value detected by the VOCs sensor reaches below the preset VOCs value and the number of ultraviolet lamps turned on in the range hood in the working state is greater than the oil fume concentration level, the host will notify the range hood closest to the fan assembly to turn off one ultraviolet lamp until the VOCs value reaches the preset VOCs value.

[0098] Step S106: Start the first ozone sensor to detect the ozone concentration value to obtain a first ozone concentration value.

[0099] Step S107 : comparing the first ozone concentration value with a preset ozone concentration value, and adjusting the operating parameters of the heater according to the comparison result.

[0100] In this embodiment, it is determined whether the first ozone concentration value exceeds a preset ozone concentration value;

[0101] If so, the heater is controlled to perform heating;

[0102] If not, the heater will not start.

[0103] Step S108, starting the second ozone sensor to detect the ozone concentration value to obtain a second ozone concentration value;

[0104] Step S109, determining whether the second ozone concentration value exceeds a preset ozone concentration value;

[0105] If yes, the heater is controlled to continue heating;

[0106] If not, turn off the heater.

[0107] In this embodiment, the first ozone sensor at the front end of the heater detects the ozone concentration flowing through the oil smoke. When the first ozone concentration value exceeds the preset ozone concentration value, the heater is turned on and the heating temperature of the heater is adjusted according to the degree to which the first ozone concentration value exceeds the preset ozone concentration value. The more the first ozone concentration value exceeds the preset ozone concentration value, the higher the temperature, thereby ensuring that the detection value detected by the second ozone sensor at the rear end of the heater is always lower than the emission preset value, that is, the second ozone concentration value does not exceed the preset ozone concentration value. The maximum heating temperature of the heater in this embodiment is preferably set to no more than 150°C, but is not limited to the above temperature value.

[0108] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, which all fall within the scope of protection of the present invention.

Claims

1. A control method for a centralized exhaust type oil fume purification system, the oil fume purification system comprising a common flue (1), a main unit (2) arranged at the top of the common flue (1), and range hoods (3) installed on different floors, wherein the range hoods (3) on different floors are respectively connected to the common flue (1), characterized in that: Also includes: A fan assembly (4), the fan assembly (4) being arranged on the host (2); A heater (5), the heater (5) being arranged at the air inlet end of the fan assembly (4), a VOCs sensor (51) and a first ozone sensor (52) being respectively arranged at an end of the heater (5) away from the fan assembly (4), and a second ozone sensor (53) being arranged at an end of the heater (5) close to the fan assembly (4); a plurality of ultraviolet lamps (6), wherein the plurality of ultraviolet lamps (6) are respectively arranged on the range hood (3); A main controller, the main controller being electrically connected to the VOCs sensor (51), the first ozone sensor (52), the heater (5), the second ozone sensor (53), and the ultraviolet lamp (6) components respectively; The control method comprises the following steps: Obtaining the current oil smoke concentration value of each range hood in a working state, obtaining the corresponding concentration level according to the oil smoke concentration value, and adjusting the working parameters of the ultraviolet lamp; Obtaining the startup rate of the range hood; comparing the start-up rate of the range hood with a preset start-up condition, and adjusting the operating parameters of the fan assembly and / or the ultraviolet lamp according to the comparison result; Get the VOCs value of oil smoke; Comparing the VOCs value with a preset VOCs value, and adjusting the operating parameters of the ultraviolet lamp according to the comparison result; Starting the first ozone sensor to detect the ozone concentration value to obtain a first ozone concentration value; The first ozone concentration value is compared with a preset ozone concentration value, and the operating parameters of the heater are adjusted according to the comparison result.

2. The control method of a centralized exhaust type oil fume purification system according to claim 1, characterized in that: The oil fume purification system further includes a purification component (7).

3. The control method of a centralized exhaust type oil fume purification system according to claim 2, characterized in that: The purification component (7) comprises at least one carbon cloth component, and the carbon cloth component is located in the middle of the heater (5) and the VOCs sensor (51).

4. The control method of a centralized exhaust type oil fume purification system according to claim 1, characterized in that: The oil fume purification system further comprises an electric valve (8), which is arranged at a position where the common flue (1) and the range hood (3) are connected, and the electric valve (8) is electrically connected to the main controller.

5. The control method of a centralized exhaust type oil fume purification system according to claim 4, characterized in that: The electric valve (8) comprises a valve plate and a drive motor, wherein the valve plate is arranged on the drive motor, and the drive motor is electrically connected to the main controller.

6. The control method of a centralized exhaust type oil fume purification system according to any one of claims 1 to 5, characterized in that: The range hood (3) comprises an oil smoke detection component (9) and a range hood body (31), wherein the oil smoke detection component (9) is arranged in the range hood body (31) to be suitable for detecting the oil smoke concentration at the range hood (3).

7. The control method of a centralized exhaust type oil fume purification system according to claim 6, characterized in that: The oil smoke detection component (9) includes a light source transmitter (91) and a light source receiver (92) that are arranged correspondingly, wherein a fan device (32) is arranged in the range hood body (31), the light source transmitter (91) and the light source receiver (92) are respectively arranged on both sides of the fan device (32), and the fan device (32), the light source transmitter (91) and the light source receiver (92) are respectively electrically connected to the main controller.

8. The control method of a centralized exhaust type oil fume purification system according to claim 1, characterized in that: The step of obtaining the corresponding concentration level according to the oil smoke concentration value and adjusting the working parameters of the ultraviolet lamp includes: The oil fume concentration value is pre-set into multiple concentration levels from low to high, and the number of the multiple ultraviolet lamps is set corresponding to the multiple concentration levels. According to the height of the oil fume concentration value corresponding to the concentration level, the number of ultraviolet lamps turned on is adjusted in sequence.

9. The control method of a centralized exhaust type oil fume purification system according to claim 8, characterized in that: The step of comparing the start-up rate of the range hood with a preset start-up condition and adjusting the operating parameters of the fan assembly and / or the ultraviolet lamp according to the comparison result includes: The range hood startup rate is pre-set with a plurality of preset startup conditions in ascending order, and the fan assembly working gear is pre-set with a plurality of gears in ascending order, the plurality of gears being set corresponding to the plurality of preset startup conditions; According to the preset power-on conditions reached by the power-on rate of the range hood, the fan assembly is controlled to work according to its corresponding gear, and the number of ultraviolet lamps turned on is readjusted again according to the current oil smoke concentration value of the range hood.

10. The control method of a centralized exhaust type oil fume purification system according to claim 9, characterized in that: The step of comparing the VOCs value with a preset VOCs value and adjusting the operating parameters of the ultraviolet lamp according to the comparison result includes: Determining whether the VOCs value exceeds the preset VOCs value; If so, controlling the range hoods in the working state to increase the number of the ultraviolet lamps turned on until all the ultraviolet lamps on the range hoods in the working state are turned on; If not, the currently turned-on number of the ultraviolet lamps is maintained.

11. The control method of a centralized exhaust type oil fume purification system according to claim 1, characterized in that: The step of comparing the first ozone concentration value with a preset ozone concentration value and adjusting the operating parameters of the heater according to the comparison result includes: determining whether the first ozone concentration value exceeds the preset ozone concentration value; If yes, controlling the heater to perform heating; If not, the heater is not activated.

12. The control method of a centralized exhaust type oil fume purification system according to claim 11, characterized in that: The step of controlling the heater to perform heating comprises: Starting the second ozone sensor to detect the ozone concentration value to obtain a second ozone concentration value; determining whether the second ozone concentration value exceeds the preset ozone concentration value; If so, controlling the heater to continue heating; If not, the heater is turned off.

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