A ventilation equipment for a fresh air system

Abstract

This invention discloses a ventilation device for a fresh air system, relating to the field of ventilation equipment. It includes a ceiling-embedded air purifier and two ducts. One end of one duct is connected to the air inlet of the ceiling-embedded air purifier. The outer walls of both ducts are fixedly fitted with the same housing. A partition is rotatably installed between the two ducts, and two symmetrically arranged ventilation openings are provided on the partition. Filters are installed on the ventilation openings. The cleaning mechanism includes a drive assembly and two dust collection hoods symmetrically arranged on both sides of the partition. This ventilation device for a fresh air system, by providing two ventilation openings and two filters, allows for ventilation of the other filter while one is being cleaned, eliminating the need to stop the fresh air system to ventilate the room before cleaning. This enhances practicality and simultaneously cleans both sides of the filter, effectively improving filtration and cleaning efficiency.

Description

Technical Field

[0001] This invention relates to ventilation equipment technology, and more specifically to a ventilation device for a fresh air system. Background Technology

[0002] A fresh air system is an independent air handling system consisting of a supply air system and an exhaust air system. It is divided into two types: ducted fresh air system and ductless fresh air system. A ducted fresh air system consists of a fresh air unit and duct fittings. The fresh air unit purifies outdoor air and introduces it into the room, while the indoor air is exhausted through the ducts. A ductless fresh air system consists of a fresh air unit, which also purifies outdoor air and introduces it into the room.

[0003] In addition to ventilation, another important function of a fresh air system is to filter pollutants in the air. By installing filters on ventilation equipment, dust and other substances in the air are filtered out. The strength of the filtration and purification capacity of the fresh air system is directly determined by the filters. Over time, a large amount of dust and other substances will accumulate on the filters, resulting in poor ventilation. Existing ventilation equipment requires the filters to be cleaned when the fresh air system is shut down, which means that ventilation cannot continue while the filters are being cleaned, making it impractical. Summary of the Invention

[0004] The purpose of this invention is to provide a ventilation device for a fresh air system to overcome the above-mentioned shortcomings of the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a ventilation device for a fresh air system, comprising a ceiling-embedded air purifier and two air ducts, wherein one end of one of the air ducts is connected to the air inlet of the ceiling-embedded air purifier, the same housing is fixedly installed on the outer side wall of both air ducts, a partition is rotatably installed between the two air ducts, and two ventilation openings are symmetrically opened on the partition, and a filter screen is installed on the ventilation opening;

[0006] The cleaning mechanism includes a drive assembly and two dust hoods symmetrically arranged on both sides of the partition. Each of the two dust hoods is equipped with a cleaning brush. The drive assembly drives the partition to rotate around the central axis of the air duct. When the central axis of one of the filters coincides with the central axis of the dust hood, the cleaning surfaces of the two cleaning brushes are in close contact with the surface of the filter.

[0007] The first drive mechanism is used to drive the cleaning brush to rotate and clean the surface of the filter screen.

[0008] A dust collection mechanism is used to adsorb dust inside two dust collection hoods. The dust collection mechanism includes a transmission component and a U-shaped tube. The two ends of the U-shaped tube are respectively connected to the bottom of the two dust collection hoods. A suction component is connected to the middle of the bottom end of the U-shaped tube. Two sealing components are provided on both sides of the middle of the bottom end of the U-shaped tube. When the cleaning brush cleans the surface of the filter screen, the transmission component drives the two sealing components to move up and down alternately to seal one end of the U-shaped tube.

[0009] Furthermore, the cleaning mechanism also includes a sleeve that is movably connected to the side plate of the dust hood. Each sleeve is fitted with an elastic element, one end of which abuts against the adjacent dust hood, and the other end of which is fixedly connected to the adjacent sleeve.

[0010] Furthermore, the drive assembly includes a rotary drive component one fixedly installed on the inner wall of the housing. One end of the output shaft of the rotary drive component one is fixedly connected to a gear. A gear ring meshes with one side of the gear. The inner side wall of the gear ring is fixedly connected to a partition. Both sides of the partition are fixedly connected to drive discs. A limiting groove is opened on the side of the drive disc. A push rod is slidably connected inside the limiting groove. A vertical rod is fixedly connected to the end of the push rod. The outside of the vertical rod is slidably connected to an adjacent dust collection hood. A wedge block one is fixedly connected to the bottom end of the vertical rod. A wedge block two abuts against the lower side of the wedge block. The bottom end of the wedge block two is rotatably connected to an adjacent sleeve. A limiting rod fixedly connected to one side of the dust collection hood is slidably connected to the middle of the wedge block two.

[0011] Furthermore, the limiting groove is composed of two symmetrically arranged arc-shaped grooves, and the two arc-shaped grooves are connected at their closest ends.

[0012] Furthermore, the first driving mechanism includes a second rotating driving component fixedly mounted on the inner wall of the housing. One end of the output shaft of the second rotating driving component is fixedly connected to a transmission shaft. Both ends of the transmission shaft are connected to a horizontal shaft via transmission belts. One end of the horizontal shaft is slidably connected to an adjacent sleeve. A sealing cover is rotatably connected to the outside of the horizontal shaft. The bottom end of the sealing cover is fixedly connected to an adjacent air duct.

[0013] Furthermore, the sealing component includes a sealing plate that is slidably connected to the inner wall of the U-shaped tube, a push block that is slidably connected to the side of the sealing plate, and an elastic element two that is fixedly connected to the top of the push block, with the top of the elastic element two being fixedly connected to the sealing plate.

[0014] Furthermore, the transmission assembly includes a reciprocating threaded groove formed on the outside of the transmission shaft, a movable block is threadedly connected to the outside of the reciprocating threaded groove, the bottom end of the movable block is slidably connected to the inner wall of the housing, and two connecting rods are hinged to the top end of the movable block, with the ends of the two connecting rods respectively hinged to their adjacent push blocks.

[0015] Furthermore, the suction component includes a dust collection box connected to the middle of the bottom end of the U-shaped tube. A dust collection screen is fixedly installed in the middle section of the inner cavity of the dust collection box. A suction fan is connected to the side of the bottom end of the dust collection box through a pipe. The bottom of the suction fan is fixedly connected to the inner wall of the housing.

[0016] This invention provides a control method, characterized in that it controls the cleaning mechanism described above, comprising the following steps:

[0017] Step S101: Collect indoor and outdoor environmental data within a set collection time, with an adjacent collection time interval of 10 minutes, and construct a first environmental sequence and a second environmental sequence.

[0018] The first environment sequence is represented as: A = {A1…A1} n}, where A1…A n These represent indoor environmental vectors at time points 1 to n, where... These represent the indoor temperature, indoor humidity, indoor oxygen concentration, indoor carbon dioxide concentration, and indoor fine particulate matter (PM2.5) values ​​at the first time point, respectively.

[0019] The second environment sequence is represented as: B = {B1…B} n}, where B1…B n Let each represent an outdoor environment vector at time points 1 to n, where These represent the outdoor temperature, outdoor humidity, outdoor oxygen concentration, outdoor carbon dioxide concentration, and outdoor fine particulate matter concentration at the first time point, respectively.

[0020] Step S102: Acquire filter images within the set acquisition time, with an adjacent acquisition time interval of 10 minutes, and construct an image sequence;

[0021] The image sequence is represented as: C = {C1…C2} n}, where C1…C n These represent the screen images at time points 1 to n, respectively.

[0022] Step S103: Input the first environment sequence, the second environment sequence, and the image sequence into the cleaning discrimination model;

[0023] The cleanup discrimination model includes: a first hidden layer, a second hidden layer, and a fully connected layer;

[0024] The first hidden layer includes: a difference calculation layer, a convolutional layer, and a splicer;

[0025] The first hidden layer's difference calculation layer is used to calculate the difference between the sequence units of the first environment sequence and the corresponding sequence units of the second environment sequence, and outputs the third environment sequence, which is represented as: D={D1…D n}, where D1…D n These represent environmental feature vectors at time points 1 to n, where... These represent the differences between indoor and outdoor temperature, indoor and outdoor humidity, indoor and outdoor oxygen concentration, indoor and outdoor carbon dioxide concentration, and indoor and outdoor fine particulate matter concentration at the first time point, respectively.

[0026] The three channels of the t-th convolutional layer of the first hidden layer are respectively input to the three primary color channels of the t-th sequence unit of the image sequence, and output the t-th image feature;

[0027] The t-th splicer in the first hidden layer is used to splice the t-th image feature with the environment feature vector corresponding to the t-th sequence unit of the third environment sequence to obtain the t-th mixed feature vector;

[0028] The second hidden layer consists of n LSTM units;

[0029] The t-th LSTM unit of the second hidden layer takes the t-th mixed feature vector as input, and the n-th LSTM unit of the second hidden layer takes the fully connected layer as input. The output of the fully connected layer represents the classification label indicating whether the filter needs to be cleaned.

[0030] Furthermore, the computation of the t-th LSTM unit in the second hidden layer includes:

[0031] Definition: x t Let h represent the t-th mixed feature vector. t-1 This represents the output of the (t-1)th LSTM unit;

[0032] The Forgotten Gate in the Second Hidden Layer t The calculation formula is as follows:

[0033] f t =σ(W f *x t +U f *h t-1 +b f )

[0034] Among them, W f Indicates input x t Passed to f t The corresponding weight matrix, U f h t-1 Passed to ft The corresponding weight matrix, b f The bias parameter is represented by σ, which represents the sigmoid activation function.

[0035] The input gate of the second hidden layer i t The calculation formula is as follows:

[0036] i t =σ(W i *x t +U i *h t-1 +b i )

[0037] Among them, W i Indicates input x t Pass to i t The corresponding weight matrix, U i h t-1 Pass to i t The corresponding weight matrix, b i The bias parameter is represented by σ, which represents the sigmoid activation function.

[0038] The output gate of the second hidden layer. t The calculation formula is as follows:

[0039] o t =σ(W o *x t +U o *h t-1 +b o )

[0040] Among them, W o Indicates input x t Transmit o t The corresponding weight matrix, U o h t-1 Passed to o t The corresponding weight matrix, b o The bias parameter is represented by σ, which represents the sigmoid activation function.

[0041] The intermediate state g of the second hidden layer t The calculation formula is as follows:

[0042] g t =tanh(W g *x t +U g *h t-1 +b g )

[0043] Among them, W g Indicates input x t Pass gt The corresponding weight matrix, U g h t-1 Pass to g t The corresponding weight matrix, b g The bias parameter is represented by tanh, which represents the hyperbolic tangent function.

[0044] The long-term state C of the second hidden layer t The calculation formula is as follows:

[0045] C t =f t ⊙C t-1 +i t ⊙g t

[0046] Among them, f t Represents the forget gate, i t Indicates the input gate, C t-1 G represents the long-term state of the (t-1)th LSTM. t ⊙ indicates an intermediate state; ⊙ indicates point-by-point multiplication.

[0047] The short-term state h of the second hidden layer t The calculation formula is as follows:

[0048] h t =o t ⊙tanh(C t )

[0049] Among them, o t Indicates the output gate, C t represents a long-term state, ⊙ represents pointwise multiplication, and tanh represents the hyperbolic tangent function;

[0050] Definition: h0 = 0, C0 = 0, * represents matrix multiplication operation.

[0051] Compared with the prior art, the ventilation device for a fresh air system provided by the present invention has two ventilation openings and two filters. When one filter is being cleaned, the other filter can continue to ventilate as usual, without having to stop the fresh air system to ventilate the room before cleaning. This makes it more practical. Furthermore, it can clean both sides of the filter at the same time, which can effectively improve the filtration effect and increase the cleaning efficiency.

[0052] When the cleaning brushes clean the surface of the filter, one of the connecting rods moves upward, and when the top of the sealing plate at its top abuts against the inner wall of the U-shaped tube, one end of the U-shaped tube is sealed for a period of time. At the same time, the top of the other connecting rod moves downward, and the other sealing plate moves downward, leaving the other end of the U-shaped tube open. Thus, while the two cleaning brushes clean both sides of the filter, the vacuuming mechanism intermittently sucks in the dust from the two vacuum hoods, effectively improving cleaning efficiency and preventing the dust cleaned from the filter from entering the air duct. Attached Figure Description

[0053] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0054] Figure 1 A schematic diagram of the overall usage state provided in this embodiment of the invention;

[0055] Figure 2 This is a schematic diagram of the overall structure (removing the ceiling-embedded air purifier) ​​provided in an embodiment of the present invention;

[0056] Figure 3 This is a schematic diagram of a first partial cross-sectional structure provided in an embodiment of the present invention;

[0057] Figure 4 Provided for embodiments of the present invention Figure 3 Enlarged diagram of point A in the diagram;

[0058] Figure 5 This is a schematic diagram of a second partial cross-sectional structure provided in an embodiment of the present invention;

[0059] Figure 6 Provided for embodiments of the present invention Figure 5 Enlarged diagram of point B in the diagram;

[0060] Figure 7 A schematic diagram showing the combination of a dust hood, cleaning brush, sleeve, horizontal shaft, elastic element one, and wedge two provided in an embodiment of the present invention;

[0061] Figure 8 This is a schematic diagram of the cleaning discrimination model provided in an embodiment of the present invention.

[0062] Explanation of reference numerals in the attached figures:

[0063] 1. Air duct; 11. Housing; 2. Partition; 3. Ventilation opening; 4. Filter screen; 5. Cleaning mechanism; 50. Drive assembly; 501. Rotary drive component one; 502. Gear; 503. Gear ring; 504. Drive disc; 505. Limiting groove; 506. Push rod; 507. Vertical rod; 508. Wedge block one; 509. Wedge block two; 510. Limiting rod; 51. Dust hood; 52. Cleaning brush; 53. Sleeve; 54. Elastic component one 6. First drive mechanism; 61. Rotary drive component two; 62. Transmission shaft; 63. Horizontal shaft; 64. Sealing cover; 7. Dust collection mechanism; 70. Transmission assembly; 701. Reciprocating threaded groove; 702. Moving block; 703. Connecting rod; 71. U-shaped tube; 72. Suction component; 721. Dust collection box; 722. Dust collection screen; 723. Suction fan; 73. Sealing component; 731. Sealing plate; 732. Push block; 733. Elastic component two. Detailed Implementation

[0064] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0065] Example:

[0066] Please see Figures 1-7 A ventilation device for a fresh air system includes a ceiling-embedded air purifier and two air ducts 1. One end of one air duct 1 is connected to the air inlet of the ceiling-embedded air purifier. The same housing 11 is fixedly installed on the outer side wall of the two air ducts 1. A partition 2 is rotatably installed between the two air ducts 1. Two ventilation openings 3 are symmetrically opened on the partition 2. A filter screen 4 is installed on the ventilation opening 3. The filter screen 4 filters the air entering the room.

[0067] One end of one of the air ducts 1 is connected to the fresh air system, and the equipment can be fixed to the wall or ventilation line through the outer wall of the housing 11 or the outer walls of the two air ducts 1.

[0068] The cleaning mechanism 5 includes a drive assembly 50 and two dust hoods 51 symmetrically arranged on both sides of the partition 2. Each dust hood 51 is equipped with a cleaning brush 52. The cleaning mechanism 5 also includes a sleeve 53 movably connected to the side plate of the dust hood 51. The sleeve 53 can rotate and slide laterally relative to the side plate of the dust hood 51. Each sleeve 53 is fitted with an elastic element 54, which includes, but is not limited to, a spring. The end of the elastic element 54 abuts against the adjacent dust hood 51, and the other end of the elastic element 54 is fixedly connected to the adjacent sleeve 53. The setting of the elastic element 54 facilitates the reset of the sleeve 53 and the cleaning brush 52.

[0069] The drive assembly 50 drives the partition 2 to rotate around the central axis of the air duct 1. When the central axis of one of the filters 4 coincides with the central axis of the dust hood 51, the cleaning surfaces of both cleaning brushes 52 are in close contact with the surface of the filters 4. The drive assembly 50 includes a rotary drive component 501 fixedly installed on the inner wall of the housing 11. The rotary drive component 501 includes, but is not limited to, a motor. A gear 502 is fixedly connected to one end of the output shaft of the rotary drive component 501. A gear ring 503 meshes with one side of the gear 502. The inner wall of the gear ring 503 is fixedly connected to the partition 2. Drive discs 504 are fixedly connected to both sides of the partition 2. A limiting groove 505 is provided on the side of the disc 504. The limiting groove 505 is composed of two symmetrically arranged arc-shaped grooves, and the two arc-shaped grooves are connected at their close ends. A push rod 506 is slidably connected inside the limiting groove 505. A vertical rod 507 is fixedly connected to the end of the push rod 506. The vertical rod 507 is slidably connected to the dust collection cover 51 adjacent to it. A wedge block 508 is fixedly connected to the bottom end of the vertical rod 507. A wedge block 509 abuts against the lower side of the wedge block 508. The bottom end of the wedge block 509 is rotatably connected to the sleeve 53 adjacent to it. A limiting rod 510 fixedly connected to one side of the dust collection cover 51 is slidably connected to the middle of the wedge block 509.

[0070] When the filter 4 needs cleaning, the rotary drive 501 is activated. The rotary drive 501 drives the gear 502 to rotate, and the gear 502 drives the partition 2 to rotate through the gear ring 503. When the partition 2 rotates until the central axis of one of the filter 4 on it coincides with the central axis of the dust hood 51, the rotary drive 501 stops rotating. Thus, when the filter 4 needs cleaning, regardless of whether one of the two filter 4 is being cleaned, the other filter 4 can still be ventilated as usual. There is no need to stop the fresh air system to ventilate the room before cleaning, which is more practical. At the same time, when the other filter 4 needs cleaning, the rotary drive 501 reverses, and the other filter 4 rotates between the two dust hoods 51.

[0071] While the partition 2 rotates, the partition 2 drives the drive disc 504 to rotate, the limiting groove 505 squeezes and pushes the push rod 506, the vertical rod 507 drives the first wedge 508 to move downward, the first wedge 508 squeezes and pushes the second wedge 509, the second wedge 509 drives the cleaning brush 52 to move towards the filter screen 4 through the sleeve 53 and sticks to the surface of the filter screen 4.

[0072] The first drive mechanism 6 is used to drive the cleaning brush 52 to rotate and clean the surface of the filter screen 4. The first drive mechanism 6 includes a second rotary drive component 61 fixedly installed on the inner wall of the housing 11. The second rotary drive component 61 includes, but is not limited to, a motor. One end of the output shaft of the second rotary drive component 61 is fixedly connected to a drive shaft 62. Both ends of the drive shaft 62 are connected to a horizontal shaft 63 via a drive belt. Drive wheels are sleeved on the outside of both ends of the drive shaft 62 and the outside of the two horizontal shafts 63. Drive belts are sleeved on the outside of the two drive wheels located on the same side. One end of the horizontal shaft 63 is slidably connected to the adjacent sleeve 53. A sealing cover 64 is rotatably connected to the outside of the horizontal shaft 63. The bottom end of the sealing cover 64 is fixedly connected to the adjacent air duct 1.

[0073] When the cleaning brush 52 is pressed against the surface of the filter screen 4, the second rotating drive component 61 is activated. The second rotating drive component 61 drives the horizontal shaft 63 to rotate through the transmission belt. The horizontal shaft 63 drives the sleeve 53 to rotate, and then the cleaning brush 52 rotates to clean the surface of the filter screen 4. The two cleaning brushes 52 clean both sides of the filter screen 4 at the same time, resulting in higher cleaning efficiency and better cleaning effect.

[0074] The dust collection mechanism 7 is used to adsorb dust inside the two dust collection hoods 51. The dust collection mechanism 7 includes a transmission component 70 and a U-shaped tube 71. The two ends of the U-shaped tube 71 are respectively connected to the bottom of the two dust collection hoods 51. The middle of the bottom end of the U-shaped tube 71 is connected to a suction component 72. The suction component 72 includes a dust collection box 721 connected to the middle of the bottom end of the U-shaped tube 71. A dust collection net 722 is fixedly installed in the middle section of the inner cavity of the dust collection box 721. A suction fan 723 is connected to the bottom side of the dust collection box 721 through a pipe. The bottom of the suction fan 723 is fixedly connected to the inner wall of the housing 11.

[0075] In this embodiment, the suction component 72 can be configured as a vacuum cleaner. Vacuum cleaners are existing technology and will not be described in detail here. The suction port of the vacuum cleaner is connected to the lower middle section of the U-shaped tube 71 through a pipe. The vacuum cleaner sucks in the dust in the two suction hoods 51 through the pipe and the U-shaped tube 71.

[0076] Two sealing components 73 are provided on both sides of the bottom middle of the U-shaped tube 71. The sealing component 73 includes a sealing plate 731 that is slidably connected to the inner wall of the U-shaped tube 71. A push block 732 is slidably connected to the side of the sealing plate 731. An elastic element 733 is fixedly connected to the top of the push block 732. The elastic element 733 includes, but is not limited to, a spring. The top of the elastic element 733 is fixedly connected to the sealing plate 731.

[0077] When the cleaning brush 52 cleans the surface of the filter screen 4, the transmission assembly 70 drives the two sealing parts 73 to move up and down alternately to seal one end of the U-shaped tube 71. The transmission assembly 70 includes a reciprocating threaded groove 701 opened outside the transmission shaft 62. A moving block 702 is threadedly connected to the outside of the reciprocating threaded groove 701. The bottom end of the moving block 702 is slidably connected to the inner wall of the housing 11. Two connecting rods 703 are hinged to the top end of the moving block 702. The ends of the two connecting rods 703 are respectively hinged to their adjacent push blocks 732.

[0078] When the cleaning brush 52 cleans the surface of the filter screen 4, the reciprocating threaded groove 701 on the drive shaft 62 drives the moving block 702 to move back and forth. When the moving block 702 moves back and forth, it drives the two connecting rods 703 to move. When the top of one connecting rod 703 moves upward, it drives the sealing plate 731 at its top to move upward through the push block 732 and the elastic element 733. When the top of the sealing plate 731 abuts against the inner wall of the U-shaped tube 71, the elastic element 733 is compressed, thereby sealing one end of the U-shaped tube 71 for a period of time. At the same time, the top of the other connecting rod 703 moves downward, and similarly, the other sealing plate 731 moves downward. The other end of the U-shaped tube 71 is in an open state. Thus, when the two cleaning brushes 52 clean the two sides of the filter screen 4 at the same time, the dust collection mechanism 7 intermittently sucks in the dust in the two dust collection hoods 51, effectively improving the cleaning efficiency and preventing the dust cleaned from the filter screen 4 from entering the air duct 1.

[0079] Filters are usually cleaned using preset rules and schedules, but frequent cleaning can damage them.

[0080] In an embodiment of the present invention, a method for controlling the cleaning mechanism 5 described above is provided, comprising the following steps:

[0081] Step S101: Collect indoor and outdoor environmental data within a set collection time, with an adjacent collection time interval of 10 minutes, and construct a first environmental sequence and a second environmental sequence.

[0082] The first environment sequence is represented as: A = {A1…A1} n}, where A1…A n These represent indoor environmental vectors at time points 1 to n, where... These represent the indoor temperature, indoor humidity, indoor oxygen concentration, indoor carbon dioxide concentration, and indoor fine particulate matter (PM2.5) values ​​at the first time point, respectively.

[0083] The second environment sequence is represented as: B = {B1…B} n}, where B1…B n Let each represent an outdoor environment vector at time points 1 to n, where These represent the outdoor temperature, outdoor humidity, outdoor oxygen concentration, outdoor carbon dioxide concentration, and outdoor fine particulate matter concentration at the first time point, respectively.

[0084] In one embodiment of the present invention, a temperature and humidity sensor, an oxygen sensor, a carbon dioxide sensor, and a fine particulate matter concentration sensor are installed at the air inlet of the fresh air system to collect indoor temperature, indoor humidity, indoor oxygen concentration, indoor carbon dioxide concentration, and indoor fine particulate matter concentration, respectively; and a temperature and humidity sensor, an oxygen sensor, a carbon dioxide sensor, and a fine particulate matter concentration sensor are installed at the air outlet of the fresh air system to collect outdoor temperature, outdoor humidity, outdoor oxygen concentration, outdoor carbon dioxide concentration, and outdoor fine particulate matter concentration, respectively.

[0085] Step S102: Acquire filter images within the set acquisition time, with an adjacent acquisition time interval of 10 minutes, and construct an image sequence;

[0086] The image sequence is represented as: C = {C1…C2} n}, where C1…C n These represent the screen images at time points 1 to n, respectively.

[0087] In one embodiment of the present invention, a camera is installed at the air inlet of the fresh air system to capture images of the filter.

[0088] Step S103: Input the first environment sequence, the second environment sequence, and the image sequence into the cleaning discrimination model;

[0089] Please see Figure 8 The cleanup and discrimination model includes: a first hidden layer, a second hidden layer, and a fully connected layer;

[0090] The first hidden layer includes: a difference calculation layer, a convolutional layer, and a splicer;

[0091] The first hidden layer's difference calculation layer is used to calculate the difference between the sequence units of the first environment sequence and the corresponding sequence units of the second environment sequence, and outputs the third environment sequence, which is represented as: D={D1…D n}, where D1…D n These represent environmental feature vectors at time points 1 to n, where... These represent the differences between indoor and outdoor temperature, indoor and outdoor humidity, indoor and outdoor oxygen concentration, indoor and outdoor carbon dioxide concentration, and indoor and outdoor fine particulate matter concentration at the first time point, respectively.

[0092] The three channels of the t-th convolutional layer of the first hidden layer are respectively input to the three primary color channels of the t-th sequence unit of the image sequence, and output the t-th image feature;

[0093] The t-th splicer in the first hidden layer is used to splice the t-th image feature with the environment feature vector corresponding to the t-th sequence unit of the third environment sequence to obtain the t-th mixed feature vector;

[0094] The second hidden layer consists of n LSTM units;

[0095] The t-th LSTM unit of the second hidden layer is input to the t-th mixed feature vector, and the n-th LSTM unit of the second hidden layer is input to the fully connected layer. The output of the fully connected layer represents the classification label indicating whether the filter needs to be cleaned.

[0096] The computation of the t-th LSTM unit in the second hidden layer includes:

[0097] Definition: x t Let h represent the t-th mixed feature vector. t-1 This represents the output of the (t-1)th LSTM unit;

[0098] The Forgotten Gate in the Second Hidden Layer t The calculation formula is as follows:

[0099] f t =σ(W f *x t +U f *h t-1 +b f )

[0100] Among them, W f Indicates input x t Passed to f t The corresponding weight matrix, U f h t-1 Passed to f t The corresponding weight matrix, b f The bias parameter is represented by σ, which represents the sigmoid activation function.

[0101] The input gate of the second hidden layer i t The calculation formula is as follows:

[0102] i t =σ(W i *x t +U i *h t-1 +b i )

[0103] Among them, W i Indicates input xt Pass to i t The corresponding weight matrix, U i h t-1 Pass to i t The corresponding weight matrix, b i The bias parameter is represented by σ, which represents the sigmoid activation function.

[0104] The output gate of the second hidden layer. t The calculation formula is as follows:

[0105] o t =σ(W o *x t +U o *h t-1 +b o )

[0106] Among them, W o Indicates input x t Transmit o t The corresponding weight matrix, U o h t-1 Passed to o t The corresponding weight matrix, b o The bias parameter is represented by σ, which represents the sigmoid activation function.

[0107] The intermediate state g of the second hidden layer t The calculation formula is as follows:

[0108] g t =tanh(W g *x t +U g *h t-1 +b g )

[0109] Among them, W g Indicates input x t Pass g t The corresponding weight matrix, U g h t-1 Pass to g t The corresponding weight matrix, b g The bias parameter is represented by tanh, which represents the hyperbolic tangent function.

[0110] The long-term state C of the second hidden layer t The calculation formula is as follows:

[0111] C t =f t ⊙C t-1 +i t ⊙g t

[0112] Among them, f t Represents the forget gate, i t Indicates the input gate, C t-1 G represents the long-term state of the (t-1)th LSTM. t ⊙ indicates an intermediate state; ⊙ indicates point-by-point multiplication.

[0113] The short-term state h of the second hidden layer t The calculation formula is as follows:

[0114] h t =o t ⊙tanh(C t )

[0115] Among them, o t Indicates the output gate, C t represents a long-term state, ⊙ represents pointwise multiplication, and tanh represents the hyperbolic tangent function;

[0116] Definition: h0 = 0, C0 = 0, * represents matrix multiplication operation.

[0117] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A ventilation device for a fresh air system, comprising a ceiling-embedded air purifier and two air ducts (1), wherein one end of one of the air ducts (1) is connected to the air inlet of the ceiling-embedded air purifier, and the outer walls of both air ducts (1) are fixedly fitted with the same housing (11), characterized in that, A partition (2) is rotatably installed between the two air ducts (1), and two vents (3) are symmetrically opened on the partition (2), and a filter screen (4) is installed on the vents (3). The cleaning mechanism (5) includes a drive assembly (50) and two dust hoods (51) symmetrically arranged on both sides of the partition (2). Each of the two dust hoods (51) is equipped with a cleaning brush (52). The drive assembly (50) drives the partition (2) to rotate around the central axis of the air duct (1). When the central axis of one of the filters (4) coincides with the central axis of the dust hood (51), the cleaning surfaces of the two cleaning brushes (52) are in close contact with the surface of the filter (4). The cleaning mechanism (5) also includes a side plate movably connected to the dust hood (51). The sleeve (53) is connected to the sleeve (53), and each sleeve (53) is fitted with an elastic element (54). The end of the elastic element (54) abuts against the adjacent dust cover (51), and the other end of the elastic element (54) is fixedly connected to the adjacent sleeve (53). The drive assembly (50) includes a rotary drive element (501) fixedly installed on the inner wall of the housing (11). One end of the output shaft of the rotary drive element (501) is fixedly connected to a gear (502). A gear ring (503) meshes with one side of the gear (502). The inner wall of the gear ring (503) is connected to the partition plate (503). 2) Fixed connection: A drive disk (504) is fixedly connected to both sides of the partition (2). A limit groove (505) is opened on the side of the drive disk (504). A push rod (506) is slidably connected inside the limit groove (505). A vertical rod (507) is fixedly connected to the end of the push rod (506). The outside of the vertical rod (507) is slidably connected to the dust collection hood (51) adjacent to it. A wedge block one (508) is fixedly connected to the bottom end of the vertical rod (507). A wedge block two (509) abuts against the lower side of the wedge block one (508). The bottom end of the wedge block two (509) is adjacent to it. The sleeve (53) is rotatably connected, and the middle part of the second wedge (509) is slidably connected to a limiting rod (510) fixedly connected to one side of the dust hood (51); when the partition (2) rotates, it drives the drive disk (504) to rotate, the limiting groove (505) squeezes and pushes the push rod (506), the vertical rod (507) drives the first wedge (508) to move downward, the first wedge (508) squeezes and pushes the second wedge (509), and the second wedge (509) drives the cleaning brush (52) to move towards the filter screen (4) through the sleeve (53); The first drive mechanism (6) is used to drive the cleaning brush (52) to rotate and clean the surface of the filter screen (4); The dust collection mechanism (7) is used to adsorb dust in the two dust collection hoods (51). The dust collection mechanism (7) includes a transmission component (70) and a U-shaped tube (71). The two ends of the U-shaped tube (71) are respectively connected to the bottom of the two dust collection hoods (51). The middle of the bottom end of the U-shaped tube (71) is connected to a suction component (72). Two sealing components (73) are provided on both sides of the middle of the bottom end of the U-shaped tube (71). When the cleaning brush (52) cleans the surface of the filter screen (4), the transmission component (70) drives the two sealing components (73) to move up and down alternately to seal one end of the U-shaped tube (71).

2. The ventilation equipment for a fresh air system according to claim 1, characterized in that, The limiting groove (505) is composed of two symmetrically arranged arc-shaped grooves, and the two arc-shaped grooves are connected at their closest ends.

3. The ventilation equipment for a fresh air system according to claim 1, characterized in that, The first drive mechanism (6) includes a second rotary drive component (61) fixedly mounted on the inner wall of the housing (11). One end of the output shaft of the second rotary drive component (61) is fixedly connected to a transmission shaft (62). Both ends of the transmission shaft (62) are connected to a horizontal shaft (63) via a transmission belt. One end of the horizontal shaft (63) is slidably connected to an adjacent sleeve (53). A sealing cover (64) is rotatably connected to the outside of the horizontal shaft (63). The bottom end of the sealing cover (64) is fixedly connected to an adjacent air duct (1).

4. A ventilation device for a fresh air system according to claim 3, characterized in that, The sealing component (73) includes a sealing plate (731) that is slidably connected to the inner wall of the U-shaped tube (71). A push block (732) is slidably connected to the side of the sealing plate (731). An elastic element (733) is fixedly connected to the top of the push block (732). The top of the elastic element (733) is fixedly connected to the sealing plate (731).

5. A ventilation device for a fresh air system according to claim 4, characterized in that, The transmission assembly (70) includes a reciprocating threaded groove (701) opened outside the transmission shaft (62), and a moving block (702) is threadedly connected to the outside of the reciprocating threaded groove (701). The bottom end of the moving block (702) is slidably connected to the inner wall of the housing (11), and two connecting rods (703) are hinged to the top end of the moving block (702). The ends of the two connecting rods (703) are respectively hinged to their adjacent push blocks (732).

6. A ventilation device for a fresh air system according to claim 1, characterized in that, The suction component (72) includes a dust collection box (721) connected to the middle of the bottom end of the U-shaped tube (71). A dust collection net (722) is fixedly installed in the middle section of the inner cavity of the dust collection box (721). A suction fan (723) is connected to the bottom side of the dust collection box (721) through a pipe. The bottom of the suction fan (723) is fixedly connected to the inner wall of the shell (11).

7. A control method, characterized in that, It is used to control the cleaning mechanism (5) as described in any one of claims 1-6, and includes the following steps: Step S101, collecting indoor environmental data and outdoor environmental data within a set collection time, with an adjacent collection time interval of 10 minutes, and constructing a first environmental sequence and a second environmental sequence; the first environmental sequence is represented as: ,in These represent indoor environment vectors at time points 1 to n, where... , The values ​​represent the indoor temperature, indoor humidity, indoor oxygen concentration, indoor carbon dioxide concentration, and indoor fine particulate matter (PM2.5) at the first time point, respectively; the second environmental series is represented as follows: ,in Let each represent an outdoor environment vector at time points 1 to n, where , These represent the outdoor temperature, outdoor humidity, outdoor oxygen concentration, outdoor carbon dioxide concentration, and outdoor fine particulate matter concentration at the first time point, respectively; Step S102: Collect filter images within a set collection time, with adjacent collection intervals of 10 minutes, and construct an image sequence; The image sequence is represented as: ,in The images represent filter images at time points 1 to n, respectively. In step S103, the first environment sequence, the second environment sequence, and the image sequence are input into the cleaning discrimination model. The cleaning discrimination model includes: a first hidden layer, a second hidden layer, and a fully connected layer. The first hidden layer includes: a difference calculation layer, a convolutional layer, and a stitcher. The difference calculation layer of the first hidden layer is used to calculate the difference between the sequence units of the first environment sequence and the corresponding sequence units of the second environment sequence, outputting a third environment sequence, which is represented as: ,in These represent environmental feature vectors at time points 1 to n, where... , The values ​​represent the differences between indoor and outdoor temperature, indoor and outdoor humidity, indoor and outdoor oxygen concentration, indoor and outdoor carbon dioxide concentration, and indoor and outdoor fine particulate matter concentration at the first time point, respectively. The three channels of the t-th convolutional layer of the first hidden layer are respectively input to the three primary color channels of the t-th sequence unit of the image sequence and output the t-th image feature. The t-th stitcher of the first hidden layer is used to stitch the t-th image feature with the environmental feature vector corresponding to the t-th sequence unit of the third environmental sequence to obtain the t-th mixed feature vector. The second hidden layer includes n LSTM units. The t-th LSTM unit of the second hidden layer inputs the t-th mixed feature vector, and the n-th LSTM unit of the second hidden layer inputs to the fully connected layer. The classification label output by the fully connected layer indicates whether the cleaning mechanism (5) needs to clean the filter.

8. The control method according to claim 7, characterized in that, The computation of the t-th LSTM unit in the second hidden layer includes: Definition: Let t represent the t-th mixed feature vector. This represents the output of the (t-1)th LSTM unit; the forget gate of the second hidden layer. The calculation formula is as follows: ,in, Indicates input Passed to The corresponding weight matrix, express Passed to The corresponding weight matrix, Indicates the bias parameter. This represents the sigmoid activation function; the input gate of the second hidden layer. The calculation formula is as follows: ,in, Indicates input Passed to The corresponding weight matrix, express Passed to The corresponding weight matrix, Indicates the bias parameter. This represents the sigmoid activation function; the output gate of the second hidden layer. The calculation formula is as follows: ,in, Indicates input Passed to The corresponding weight matrix, express Passed to The corresponding weight matrix, Indicates the bias parameter. This represents the sigmoid activation function; intermediate states of the second hidden layer. The calculation formula is as follows: ,in, Indicates input Passed to The corresponding weight matrix, express Passed to The corresponding weight matrix, Indicates the bias parameter. Represents the hyperbolic tangent function; the long-term state of the second hidden layer. The calculation formula is as follows: ,in, Represents the Gate of Oblivion Indicates the input gate. This represents the long-term state of the (t-1)th LSTM. Indicates an intermediate state. This represents pointwise multiplication; the short-time state of the second hidden layer. The calculation formula is as follows: ,in, Indicates the output gate. Indicates a long-term state. This indicates point-by-point multiplication. Represents the hyperbolic tangent function; Definition: , , * indicates matrix multiplication.

Images