An air purification device for a fresh air system

Abstract

This invention relates to the field of air purification technology and discloses an air purification device for a fresh air system, including a housing with an air inlet and an air outlet. The housing is connected to a duct, and the duct has an air channel connecting to the air inlet of the housing. A high-voltage electrostatic module is installed in the air channel, along with a first sensor and a second sensor. A controller adjusts the effective working area of ​​the high-voltage electrostatic module in the air channel based on the concentration of oil fumes detected by the first sensor. The effective working area refers to the area of ​​the electric field generated between the positive and negative plates projected onto the negative plate. The concentration of oil fumes detected by the first sensor is proportional to the effective working area of ​​the high-voltage electrostatic module. The effective working area of ​​the high-voltage electrostatic module must ensure that the concentration of oil fumes detected by the second sensor is lower than a set concentration threshold. This invention can optimize purification capacity while minimizing ozone generation.

Description

Technical Field

[0001] This invention relates to the field of air purification technology, and more specifically, to an air purification device for a fresh air system. Background Technology

[0002] The air purification equipment in the fresh air system is equipped with a high-voltage electrostatic grille to remove cooking fumes. The cooking fumes in the kitchen fresh air system can affect the operation of other air handling layers. Therefore, the high-voltage electrostatic grille comes into contact with the air to be purified first. Under different circumstances, the high-voltage electrostatic electricity of the high-voltage electrostatic grille can ionize oxygen and produce ozone. The ozone carried in the exhaust air will cause ozone pollution. Long-term emissions will lead to the ozone concentration at the emission point exceeding the standard. Summary of the Invention

[0003] This invention provides an air purification device for a fresh air system, solving the technical problems in related technologies.

[0004] This invention provides an air purification device for a fresh air system, including a housing with an air inlet and an air outlet. The housing is connected to a duct, and the duct has an air channel connecting to the air inlet of the housing. A high-voltage electrostatic module is installed in the air channel, along with a first sensor and a second sensor. The first sensor detects the concentration of oil fumes in the air channel before purification by the high-voltage electrostatic module, and the second sensor detects the concentration of oil fumes in the air channel after purification by the high-voltage electrostatic module. A controller adjusts the effective working area of ​​the high-voltage electrostatic module in the air channel based on the oil fume concentration detected by the first sensor. The effective working area refers to the area of ​​the electric field generated between the positive and negative plates projected onto the negative plate. The oil fume concentration detected by the first sensor is proportional to the effective working area of ​​the high-voltage electrostatic module. The effective working area of ​​the high-voltage electrostatic module must ensure that the oil fume concentration detected by the second sensor is lower than a set concentration threshold.

[0005] Furthermore, multiple high-voltage electrostatic modules are provided, and these modules are evenly distributed within the air duct of the purifier. The controller includes switches, and the multiple high-voltage electrostatic modules are connected to the multiple switches respectively. The number of high-voltage electrostatic modules operating within the air duct is controlled by the switches.

[0006] Furthermore, the current of the first sensor controls the switch. Each switch has a different starting current. When the current of the first sensor is greater than the starting current of the switch, the switch closes. The switch is normally open.

[0007] Furthermore, the switch is an overcurrent relay.

[0008] Furthermore, the high-voltage electrostatic module includes two plates, one of which is movable. This movement reduces the area of ​​overlap between the projection of the positive plate along the direction perpendicular to the airflow and the negative plate, thereby reducing the effective working area.

[0009] Furthermore, the controller includes a first drive mechanism, an electrode plate connected to the first drive mechanism for driving it to rotate about a rotation axis perpendicular to the electrode plate.

[0010] Furthermore, the controller includes a second drive mechanism, with a plate connected to the second drive mechanism for driving it to move in the direction of airflow.

[0011] Furthermore, the air channel is equipped with multiple sets of high-voltage electrostatic modules arranged along the vertical airflow direction. One side of the air channel has an opening for the high-voltage electrostatic modules to move through. The controller includes a third drive mechanism. The high-voltage electrostatic modules are connected to the third drive mechanism for driving them to move along the vertical airflow direction. When it is necessary to reduce the effective working area of ​​the high-voltage electrostatic modules, one or more high-voltage electrostatic modules can be moved from the opening to the outside of the air channel. The opening is equipped with a door for closing the opening.

[0012] Furthermore, the third drive mechanism includes: an electric push rod, which is connected to a high-voltage electrostatic module near the opening via a connector. The two electrode plates of the high-voltage electrostatic module are fixedly mounted on an insulating mounting plate, which is located on top of the electrode plates. The insulating mounting plates of two adjacent high-voltage electrostatic modules are connected by a hinge mechanism. The hinge mechanism includes two intersecting rods, which are hinged at the middle by a pin, and the two ends of the rods are connected to sliding pins. The insulating mounting plate is provided with a slide rail that is clearance-fitted with the sliding pin.

[0013] This invention provides an air purification method for a fresh air system, comprising the following steps:

[0014] Step 101: Set up m uniformly distributed first sensors and m uniformly distributed second sensors in the air channel; collect flue gas concentration data multiple times within a time period each time, with the time between the sampling time points of two adjacent collections being the same;

[0015] Step 102: Generate a first flue gas feature sequence and a second flue gas feature sequence based on the collected flue gas concentration data. The first flue gas feature sequence is represented as A = {A1, A2...A...} c}, where A1, A2, A c Representing the 1st, 2nd, and cth sequence units respectively, A c ={A 1，c A 2，c …A m，c}, where A 1，c A 2，c A m，c The values ​​of the flue gas concentration collected by the first, second, and m sensors at the c-th sampling time point are represented as follows: The second flue gas characteristic sequence is represented as B = {B1, B2, ..., B}. c}, where B1, B2, B c B represents the 1st, 2nd, and cth sequence units, respectively. c ={B 1，c B 2，c …B m，c}, where B 1，c B 2，c B m，c These represent the flue gas concentration values ​​collected by the 1st, 2nd, and mth second sensors at the c-th sampling time point, respectively;

[0016] Step 103: Input the first flue gas feature sequence and the second flue gas feature sequence into the control generation model. The control generation model includes a first hidden layer, a second hidden layer, a connection layer, a third hidden layer, and an output layer. The first hidden layer includes a first RNN unit. At time step t, the first RNN unit is input to the t-th sequence unit of the first flue gas feature sequence and outputs the t-th first output feature. The second hidden layer includes a second RNN unit. At time step t, the second RNN unit is input to the t-th sequence unit of the second flue gas feature sequence and outputs the t-th second output feature. The calculation formula for the connection layer is as follows: L t =concat(Y 1，t Y 2，t ), where L t Y represents the t-th sequence unit of the connection sequence output by the connection layer. 1，t and Y 2，t These represent the t-th first output feature and the second output feature, respectively.

[0017] The third hidden layer includes a third RNN unit. The third RNN unit is input to the t-th sequence unit of the connection sequence at the t-th time step. The output of the third RNN unit at the c-th time step is input to the output layer. The output layer outputs the target effective working area ratio of the high-voltage electrostatic module.

[0018] The beneficial effects of this invention are: it can optimize the control of the high-voltage electrostatic module to ensure purification capacity while minimizing the generation of ozone. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of an air purification device for a fresh air system according to the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the third drive mechanism of an air purification device for a fresh air system according to the present invention;

[0021] Figure 3 This is a schematic diagram of a high-voltage electrostatic module for an air purification device for a fresh air system according to the present invention;

[0022] Figure 4This is a schematic diagram of a module of an air purification device for a fresh air system according to the present invention;

[0023] Figure 5 This is a flowchart of an air purification method for a fresh air system according to the present invention.

[0024] In the diagram: 1. Outer shell; 2. High voltage electrostatic module; 21. Electrode plate; 3. First sensor; 4. Second sensor; 5. Controller; 6. Air duct; 61. Opening; 501. Electric push rod; 502. Connector; 503. Insulating mounting plate; 504. Rod; 505. Detailed Implementation

[0025] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and implement the subject matter described herein, and changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, features described in some examples may be combined in other examples.

[0026] like Figures 1-4 As shown, an air purification device for a fresh air system includes: a housing 1, with an air inlet and an air outlet on the housing 1, the housing 1 connected to a duct 6, and an air channel inside the duct 6 connecting to the air inlet of the housing 1. A high-voltage electrostatic module 2 is installed inside the air channel, along with a first sensor 3 and a second sensor 4. The first sensor 3 detects the concentration of oil fumes in the air channel before purification by the high-voltage electrostatic module 2, and the second sensor 4 detects the concentration of oil fumes in the air channel after purification by the high-voltage electrostatic module 2. A controller 5 adjusts the effective working area of ​​the high-voltage electrostatic module 2 in the air channel according to the oil fume concentration detected by the first sensor 3. The effective working area refers to the area of ​​the electric field generated between the positive and negative plates projected onto the negative plate. The oil fume concentration detected by the first sensor 3 is proportional to the effective working area of ​​the high-voltage electrostatic module 2. The effective working area of ​​the high-voltage electrostatic module 2 must ensure that the oil fume concentration detected by the second sensor 4 is lower than a set concentration threshold.

[0027] In one embodiment of the present invention, multiple high-voltage electrostatic modules 2 are provided, and the multiple high-voltage electrostatic modules 2 are evenly distributed in the air channel of the purifier. The controller 5 includes switches, and the multiple high-voltage electrostatic modules 2 are respectively connected to the multiple switches. The number of high-voltage electrostatic modules 2 operating in the air channel is controlled by the switches.

[0028] The current of the first sensor 3 controls the switch. Each switch has a different starting current. When the current of the first sensor 3 is greater than the starting current of the switch, the switch is closed. The switch is normally open.

[0029] Furthermore, the switch is an overcurrent relay.

[0030] In one embodiment of the present invention, the high-voltage electrostatic module 2 includes two electrode plates 21, one of which is movable. The movement can reduce the area of ​​overlap between the projection of the positive electrode plate along the direction perpendicular to the airflow and the negative electrode plate, thereby reducing the effective working area.

[0031] Furthermore, as a means of moving the electrode 21, the controller 5 includes a first drive mechanism, wherein an electrode 21 is connected to the first drive mechanism for driving it to rotate about a rotation axis perpendicular to the electrode 21.

[0032] Furthermore, as a means of moving the electrode 21, the controller 5 includes a second drive mechanism, with one electrode 21 connected to the second drive mechanism for driving it to move in the direction of airflow.

[0033] In one embodiment of the present invention, a plurality of high-voltage electrostatic modules 2 are arranged in the air channel along the direction of vertical airflow. An opening 61 is provided on one side of the air channel for the high-voltage electrostatic modules 2 to move through. The controller 5 includes a third drive mechanism. The high-voltage electrostatic modules 2 are connected to the third drive mechanism for driving them to move along the direction of vertical airflow. When it is necessary to reduce the effective working area of ​​the high-voltage electrostatic modules 2, one or more high-voltage electrostatic modules 2 are moved from the opening 61 to the outside of the air channel. The opening 61 is provided with a door for closing the opening 61.

[0034] Furthermore, the third driving mechanism includes an electric push rod 501, which is connected to a high-voltage electrostatic module 2 near the opening 61 via a connector 502. The two electrode plates 21 of the high-voltage electrostatic module 2 are fixedly mounted on an insulating mounting plate 503, which is located on top of the electrode plates 21. The insulating mounting plates 503 of two adjacent high-voltage electrostatic modules 2 are connected by a hinge mechanism. The hinge mechanism includes two intersecting rods 504, with the middle of the rods 504 hinged by a pin. The two ends of the rods 504 are connected to sliding pins 505. The insulating mounting plate 503 is provided with a slide rail that engages with the sliding pins 505. The electric push rod 501 pushes the outer high-voltage electrostatic module 2 to move. This high-voltage electrostatic module 2 synchronously drives the other high-voltage electrostatic modules 2 to move synchronously via the hinge mechanism. This not only achieves the function of driving the high-voltage electrostatic modules 2 to move, but also ensures that the distance between the high-voltage electrostatic modules 2 is the same, allowing them to be evenly distributed within the air channel and preventing some air from not being processed by the high-voltage electrostatic modules 2.

[0035] Furthermore, the door is the electrode plate 21 of the high-voltage electrostatic module 2. The distance that the third drive mechanism moves each time is fixed. Each time the movement stops, the electrode plate 21 of the high-voltage electrostatic module 2 will close the opening 61.

[0036] In one embodiment of the present invention, at least one fan for driving airflow is provided inside the housing 1.

[0037] like Figure 5 As shown, the present invention provides an air purification method for a fresh air system, comprising the following steps:

[0038] Step 101: Set up m uniformly distributed first sensors 3 and m uniformly distributed second sensors 4 in the air channel; collect flue gas concentration data multiple times within a time period, with the time between two adjacent collections being the same.

[0039] Step 102: Generate a first flue gas feature sequence and a second flue gas feature sequence based on the collected flue gas concentration data. The first flue gas feature sequence is represented as A = {A1, A2, ..., A...} c}, where A1, A2, A c Representing the 1st, 2nd, and cth sequence units respectively, A c ={A 1，c A 2，c …A m，c}, where A 1，c A 2，c A m，c The values ​​of the flue gas concentration collected by the first, second, and m sensors at the c-th sampling time point are represented as B = {B1, B2, ..., B}. c}, where B1, B2, B c B represents the 1st, 2nd, and cth sequence units, respectively. c ={B 1，c B 2，c …B m，c}, where B 1，c B 2，c B m，c These represent the flue gas concentration values ​​collected by the 1st, 2nd, and mth second sensors 4 at the c-th sampling time point, respectively.

[0040] Step 103: Input the first flue gas feature sequence and the second flue gas feature sequence into the control generation model. The control generation model includes a first hidden layer, a second hidden layer, a connection layer, a third hidden layer, and an output layer. The first hidden layer includes a first RNN unit. At time step t, the first RNN unit is input to the t-th sequence unit of the first flue gas feature sequence and outputs the t-th first output feature. The second hidden layer includes a second RNN unit. At time step t, the second RNN unit is input to the t-th sequence unit of the second flue gas feature sequence and outputs the t-th second output feature. The calculation formula for the connection layer is as follows: L t =concat(Y 1，t Y2，t ), where L t Y represents the t-th sequence unit of the connection sequence output by the connection layer. 1，t and Y 2，t These represent the t-th first output feature and the second output feature, respectively.

[0041] The third hidden layer includes a third RNN unit. The t-th time step input of the third RNN unit is connected to the t-th sequence unit of the sequence. The c-th time step output of the third RNN unit is input to the output layer. The output layer outputs the target effective working area ratio of the high-voltage electrostatic module 2.

[0042] The effective working area ratio of the output is controlled according to the adjustment method of the effective working area of ​​the high voltage electrostatic module 2. For example, if the effective working area of ​​the output is controlled by controlling the number of high voltage electrostatic modules 2 in operation, then the average value of the effective working area ratio from 0 to 100 is discretized into N+1 point values ​​as category labels for output, where N is the number of high voltage electrostatic modules 2.

[0043] For adjusting the effective working area of ​​the high-voltage electrostatic module 2, the mean value of the effective working area ratio from 0 to 100 can be discretized into multiple point values ​​as category labels for output, or the value of the effective working area ratio can be directly output.

[0044] The target effective working area ratio of the training samples for controlling the generation model is calculated based on the minimum effective working area where the concentration of oil fumes detected by the adjusted second sensor 4 is lower than the set concentration threshold.

[0045] This invention can optimize the control of the high-voltage electrostatic module 2 to ensure purification capacity while minimizing ozone generation.

[0046] The embodiments of this example have been described above. However, this example is not limited to the specific implementation methods described above. The specific implementation methods described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms based on the guidance of this example, and all of them are within the protection scope of this example.

Claims

1. An air purification device for a fresh air system, comprising a housing, the housing being provided with an air inlet and an air outlet, the housing being connected to an air duct, the air duct being provided with an air passage that is in communication with the air inlet of the housing, characterized in that, The housing contains at least one fan for driving airflow. A high-voltage electrostatic module is installed within the air passage. A first sensor and a second sensor are also located within the air passage. The first sensor detects the concentration of oil fumes in the air that has not been purified by the high-voltage electrostatic module, while the second sensor detects the concentration of oil fumes in the air that has been purified by the high-voltage electrostatic module. The controller adjusts the effective working area of ​​the high-voltage electrostatic module within the air passage based on the oil fume concentration detected by the first sensor. The effective working area refers to the area projected onto the negative electrode by the electric field generated between the positive and negative electrodes. The oil fume concentration detected by the first sensor is proportional to the effective working area of ​​the high-voltage electrostatic module. The effective working area of ​​the high-voltage electrostatic module must ensure that the oil fume concentration detected by the second sensor is below a set concentration threshold. Multiple sets of high-voltage electrostatic modules are arranged perpendicular to the airflow direction within the air passage. An opening on one side of the air passage allows the high-voltage electrostatic modules to move through. The controller... The system includes a third drive mechanism. The high-voltage electrostatic module is connected to this third drive mechanism to move along the direction perpendicular to the airflow. When it is necessary to reduce the effective working area of ​​the high-voltage electrostatic module, one or more high-voltage electrostatic modules are moved from the opening to the outside of the air passage. The opening is equipped with a door for closing the opening; the door is the electrode plate of the high-voltage electrostatic module. The distance the third drive mechanism moves each time is fixed. Each time the movement stops, the electrode plate of the high-voltage electrostatic module closes the opening. The third drive mechanism includes an electric push rod, which is connected to a high-voltage electrostatic module near the opening via a connector. The two electrode plates of the high-voltage electrostatic module are fixedly mounted on an insulating mounting plate, which is located on top of the electrode plates. The insulating mounting plates of two adjacent high-voltage electrostatic modules are connected by a hinge mechanism. The hinge mechanism includes two intersecting rods, hinged at the middle by a pin, with sliding pins connected to both ends of the rods. The insulating mounting plate is equipped with a slide rail that engages with the sliding pins.

2. The air purification device for a fresh air system according to claim 1, characterized in that, The system has multiple high-voltage electrostatic modules, which are evenly distributed within the air duct of the purifier. The controller includes switches, and each of the multiple high-voltage electrostatic modules is connected to a separate switch. The number of high-voltage electrostatic modules operating within the air duct is controlled by the switches.

3. An air purification device for a fresh air system according to claim 2, characterized in that, The switch is controlled by the current of the first sensor. Each switch has a different starting current. The switch closes when the current of the first sensor is greater than the starting current of the switch. The switch is normally open.

4. An air purification device for a fresh air system according to claim 3, characterized in that, The switch is an overcurrent relay.

5. An air purification device for a fresh air system according to claim 1, characterized in that, The high-voltage electrostatic module includes two plates, one of which is movable. The movement reduces the area of ​​overlap between the projection of the positive plate along the direction perpendicular to the airflow and the negative plate, thereby reducing the effective working area.

6. An air purification device for a fresh air system according to claim 5, characterized in that, The controller includes a first drive mechanism and an electrode plate connected to the first drive mechanism for driving it to rotate about a rotation axis perpendicular to the electrode plate.

7. An air purification device for a fresh air system according to claim 5, characterized in that, The controller includes a second drive mechanism, and a pole plate is connected to the second drive mechanism for driving it to move in the direction of airflow.

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