Energy-saving air inlet system capable of adjusting filtering strength of filter screen according to air quality

Abstract

The utility model relates to the technical field of milk powder manufacturing, in particular to an energy-saving air inlet system, filter screens for filtering air are arranged in an inner cavity of an air inlet channel, and each filter screen comprises a front filter screen arranged on the rear side of a fixed filter screen in the air inlet channel; the front filter screen is provided with movable front filter cotton, the front filter cotton is provided with a front fixing frame for fixing the front filter cotton, and the front fixing frame is rotatably connected into the air inlet channel; the front filter screen is also provided with a front driving mechanism for driving the front fixing frame to rotate; the front driving mechanism is further provided with a front driving motor for driving the front driving mechanism to work; a laser dust sensor system is further arranged, the laser dust sensor system is arranged on the front side of the fixed filter screen of the air inlet channel, and the air flow direction of a ventilation opening of the laser dust sensor system and the air flow direction of an air inlet of the air inlet channel are kept consistent; the signal output end is in control connection with the front driving motor, so that the filtering strength of the filter screen is automatically adjusted according to the air quality, and the air inlet system realizes intelligent and automatic adjustment of the filter screen and is more energy-saving.

Description

Technical Field

[0001] The present application relates to the technical field of milk powder manufacturing, and in particular to an energy-saving air intake system. Background Art

[0002] In order to quickly evaporate the water in the milk during milk powder manufacturing, high-temperature gas is generally used to provide sufficient heat to quickly evaporate the water in the milk, thereby achieving rapid drying and converting the milk into milk powder.

[0003] Because high-temperature gas directly contacts the product during the milk powder drying process, the cleanliness of the gas has a great impact on the quality of the milk powder.

[0004] Installing a filter in the air intake system will increase the air flow resistance, increase energy consumption, and increase operating costs. Utility Model Content

[0005] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the name of the utility model of this application to avoid blurring the purpose of this section, the abstract of the specification and the name of the utility model, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0006] In view of the above problems existing in the prior art, the present utility model is proposed.

[0007] The air inlet channel includes an air inlet channel, wherein the position close to the air inlet is the front side, and the position away from the air inlet is the rear side. A fixed filter is provided in the inner cavity of the air inlet channel, which is called a fixed filter;

[0008] The inner cavity of the air inlet channel is provided with a filter screen for filtering air, and the filter screen includes a filter screen arranged at the rear side of the fixed filter screen in the air inlet channel, which is called the front filter screen;

[0009] The front filter screen is provided with a movable filter cotton, called the front filter cotton, and the front filter cotton is provided with a frame structure for fixing the front filter cotton, called the front fixing frame, and the front fixing frame is rotatably connected to the air inlet channel;

[0010] The front filter is also provided with a driving mechanism for driving the front fixing frame to rotate, which is called the front driving mechanism;

[0011] The front drive mechanism is further provided with a motor that drives the front drive mechanism to work, which is called the front drive motor;

[0012] A laser dust sensor system is also provided, which outputs a switch control signal through a signal output terminal when the dust concentration exceeds the standard. The laser dust sensor system is arranged in front of the fixed filter of the air inlet channel, and the ventilation port of the laser dust sensor system is consistent with the air flow direction at the air inlet of the air inlet channel;

[0013] The signal output terminal controls the connection to the front drive motor.

[0014] The above design, first of all, can filter the air passing through the air inlet channel by setting a front filter for filtering the air, so as to ensure the cleanliness of the air supplied to the evaporated milk in the air inlet channel; secondly, the front filter and the rear filter are provided with movable front filter cotton, and the front filter cotton can be rotated and opened through the front fixing frame, so that the front filter can be opened and adjusted to filter the air with an air filter strength, thereby achieving the purpose of energy saving; finally, a laser dust sensor system is provided to measure the air quality in the air inlet channel, and then the switch control system is used to control the front drive motor to rotate the front fixing frame through the front drive mechanism to open the front filter according to the signal of the laser dust sensor, so as to realize automatic adjustment of the filter strength of the filter according to the air quality, so that the air inlet system can realize intelligent automatic adjustment of the filter and be more energy-efficient.

[0015] The filter screen also includes a filter screen arranged at the rear side of the front filter screen in the air inlet channel, which is called the rear filter screen; the rear filter screen is provided with another movable filter cotton, which is called the rear filter cotton, and the rear filter cotton is provided with another frame structure for fixing the rear filter cotton, which is called the rear fixing frame, and the front fixing frame is rotatably connected in the air inlet channel; the rear filter screen is also provided with another driving mechanism for driving the rear fixing frame to rotate, which is called the rear driving mechanism; the rear driving mechanism is also provided with another motor for driving the rear driving mechanism to work, which is called the rear driving motor; the laser dust sensor system has a switch control system, and ... The signal output end of the dust sensor is connected to the signal receiving end of the switch control system, and the signal output end of the switch control system outputs a switch control signal; by setting the rear filter and the switch control system, the laser dust sensor system adjusts the filtering strength of the air inlet channel according to the degree of dust concentration exceeding the standard. When the dust exceeds the standard seriously, the switch control system controls the front filter and the rear filter cotton to be closed for air filtering. If the dust exceeds the standard slightly, the rear filter is opened and only the front filter is used for filtering, so that the air inlet channel can realize multi-level automatic adjustment of the filtering strength of the filter according to the degree of dust exceeding the standard in air quality, and the degree of intelligence is higher.

[0016] Preferably, the front fixing frame is provided with a rotating shaft, which is exposed from the side wall of the air inlet channel, and the front driving mechanism further includes a gear connected to the rotating shaft of the front fixing frame, which is called a front driven gear; the front driving mechanism is further provided with a rack that can slidably cooperate with the air inlet channel, which is called a front rack, and the driven gear is meshed with the front rack; the rear fixing frame is provided with another rotating shaft, which is also exposed from the side wall of the air inlet channel, and the rear driving mechanism further includes a gear connected to the other rotating shaft of the rear fixing frame, which is called a rear driven gear; the rear driving mechanism Another rack is also provided which can slideably cooperate with the air inlet channel, called the rear rack, and the rear driven gear is meshed with the rear rack; the front driven gear and the rear driven gear are driven to rotate by the front rack and the rear rack, so that the front filter cotton of the front filter rotates synchronously, and the rear filter cotton of the rear filter also rotates synchronously, so that the opening or closing position of the front filter and the rear filter is more accurate, avoiding air leakage when the front filter and the rear filter are closed, resulting in unclean air filtration, or insufficient opening and wasting energy, and the front filter cotton and the rear filter cotton on the front filter and the rear filter can be set to be larger than the above method.

[0017] Preferably, the front drive mechanism also includes a gear connected to the drive shaft of the front drive motor, called a front driving gear, which is engaged with the front rack, so that the front drive motor drives the front fixed frame to drive the front filter cotton to rotate; the rear drive mechanism also includes a gear connected to the drive shaft of the rear drive motor, called a rear driving gear, which is engaged with the rear rack, so that the rear drive motor drives the rear fixed frame to drive the rear filter cotton to rotate; by setting the front driving gear and the rear driving gear, it is ensured that the front drive motor and the rear drive motor can drive the front rack and the rear rack to move, so that the front drive motor drives the front filter cotton to rotate, and the rear drive motor drives the rear filter cotton to rotate, which provides a basis for automatically adjusting the filter screen.

[0018] Preferably, the fixed filter screen is made of a stainless steel wire mesh; by providing the wire mesh, the front filter screen can be protected and some fibers can be blocked, thereby extending the service life of the front filter screen and the rear filter screen.

[0019] Preferably, the front filter cotton and the rear filter cotton are both made of glass fiber filter cotton; glass fiber filter cotton is a filter material used to filter tiny particles in air, liquid or gas, and has the characteristics of high efficiency filtering performance, high temperature resistance, corrosion resistance, wear resistance, etc., which extends the service life of the front filter and the rear filter.

[0020] Preferably, the width of the front filter cotton is 6-10 cm, the thickness is 0.5-1.5 cm, the interval between the arranged front filter cottons is 5.5-8.5 cm, and the front filter cotton protrudes 0.5-1 cm from the front fixing frame; the width of the rear filter cotton is 6-10 cm, the thickness is 0.5-1.5 cm, the interval between the arranged rear filter cottons is 5.5-8.5 cm, and the rear filter cotton protrudes 0.5-1 cm from the rear fixing frame; the thickness of the front filter cotton and the rear filter cotton is 0.5-1.5 cm to ensure the filtering effect of the front filter cotton and the rear filter cotton, and when the front filter cotton closes the front filter screen when the front fixing frame rotates, or when the filter cotton closes the rear filter screen after the rear filter cotton frame rotates, it is ensured that the front filter screen and the rear filter screen will not leak air.

[0021] Preferably, magnets are embedded in the cotton layers on the upper and lower sides of the front filter cotton, and the magnets in adjacent front filter cottons are magnetically attracted to each other; another magnet is embedded in the cotton layers on the upper and lower sides of the rear filter cotton, and the magnets in adjacent rear filter cottons are magnetically attracted to each other; the magnets attract the adjacent front filter cottons or rear filter cottons together when the front filter or the rear filter is closed, further ensuring that there is no air leakage when the front filter and the rear filter are closed. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without inventive work. Among them:

[0023] Figure 1 A schematic diagram of the structure of a front filter and a rear filter in a ventilation duct that adjusts the filter strength according to air quality according to an embodiment of the present invention;

[0024] Figure 2 A schematic structural diagram of a front filter that adjusts the filter strength according to air quality according to an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the overall structure of adjusting the filtering intensity of the filter according to the air quality according to an embodiment provided by the utility model. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more understandable, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0027] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] Next, the present invention is described in detail with reference to schematic diagrams. For ease of illustration, cross-sectional views of device structures may be partially enlarged and not to scale when describing embodiments of the present invention. Furthermore, the schematic diagrams are merely illustrative and should not limit the scope of protection of the present invention. Furthermore, in actual production, three-dimensional dimensions, including length, width, and depth, should be included.

[0029] Furthermore, the term "one embodiment" or "embodiment" herein refers to specific features, structures, or characteristics that may be included in one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it necessarily refer to separate or selective embodiments that are mutually exclusive with other embodiments.

[0030] Example 1

[0031] Reference Figure 1-Figure 3 This embodiment provides an energy-saving air intake system that adjusts the filtering intensity of the filter according to the air quality, including an air inlet channel 1, the position close to the air inlet 2 in the air inlet channel 1 is the front side, and the position away from the air inlet 2 is the rear side. A fixed filter is provided in the inner cavity of the air inlet channel 1, which is called a fixed filter 6.

[0032] The inner cavity of the air inlet channel 1 is provided with a filter screen for filtering air, and the filter screen includes a filter screen arranged on the rear side of the fixed filter screen 6 in the air inlet channel 1, which is called the front filter screen; the front filter screen is provided with movable filter cotton, called the front filter cotton 31, and the front filter cotton 31 is provided with a frame structure for fixing the front filter cotton 31, called the front fixed frame 32, and the front fixed frame 32 is rotatably connected to the air inlet channel 1; the front filter screen is also provided with a driving mechanism for driving the front fixed frame 32 to rotate, called the front driving mechanism; the front driving mechanism is also provided with a motor for driving the front driving mechanism to work, called the front driving motor 33; a laser dust sensor system 5 is also provided, which outputs a switch control signal through the signal output end when the dust concentration exceeds the standard, and the laser dust sensor system 5 is arranged in front of the fixed filter screen 6 of the air inlet channel 1, and the ventilation port of the laser dust sensor system 5 is connected to the air inlet The air flow direction at the air inlet 2 of the wind channel 1 remains consistent; the signal output end controls the connection to the front drive motor 33. First, by setting a front filter for filtering the air, the air passing through the air inlet channel 1 can be filtered to ensure the cleanliness of the air supplied to the evaporated milk by the air inlet channel 1. Secondly, the front filter and the rear filter are provided with movable front filter cotton 31. The front filter cotton 31 can be rotated and opened through the front fixing frame 32, so that the front filter can be opened to adjust the filtering strength of the air to achieve the purpose of energy saving. Finally, a laser dust sensor system 5 is provided to measure the air quality in the air inlet channel 1, and then the switch control system is used to control the front drive motor 33 to rotate the front fixing frame 32 through the front drive mechanism according to the signal of the laser dust sensor to open the front filter, so as to realize automatic adjustment of the filtering strength of the filter according to the air quality, so that the air inlet system can realize intelligent automatic adjustment of the filter and be more energy-efficient.

[0033] The filter screen also includes a filter screen arranged on the rear side of the front filter screen in the air inlet channel 1, which is called the rear filter screen; the rear filter screen is provided with another movable filter cotton, called the rear filter cotton 41, and the rear filter cotton 41 is provided with another frame structure for fixing the rear filter cotton 41, called the rear fixing frame 42, and the front fixing frame 32 is rotatably connected in the air inlet channel 1; the rear filter screen is also provided with another driving mechanism for driving the rear fixing frame 42 to rotate, called the rear driving mechanism; the rear driving mechanism is also provided with another motor for driving the rear driving mechanism to work, called the rear driving motor 43; the laser dust sensor system 5 has a switch control system, and the laser dust sensor The signal output end of the sensor is connected to the signal receiving end of the switch control system, and the signal output end of the switch control system outputs the switch control signal; by setting the rear filter and the switch control system, the laser dust sensor system 5 adjusts the filtering strength of the air inlet channel 1 according to the degree of dust concentration exceeding the standard. When the dust exceeds the standard seriously, the switch control system controls the front filter and the rear filter cotton 41 to be closed for air filtering. If the dust exceeds the standard not seriously, the rear filter is opened and only the front filter is used for filtering, so that the air inlet channel 1 can realize multi-level automatic adjustment of the filtering strength of the filter according to the degree of dust exceeding the standard in air quality, and the degree of intelligence is higher.

[0034] The laser dust sensor in the laser dust sensor system 5 is the MMD201. It uses the principle of laser scattering. Laser light is irradiated onto suspended particles in the air entering the vent through the laser dust sensor system 5, causing them to scatter. The scattered light is collected at a specific angle, generating a curve showing the intensity of the scattered light over time. After collecting the data, a microprocessor uses Fourier transform to determine the relationship between the time and frequency domains, thereby determining the equivalent particle size and the number of particles of different sizes per unit volume. The switch control system is an S7-1200.

[0035] The fixed filter screen 6 is made of a stainless steel wire mesh; the steel wire mesh is provided to protect the front filter screen and block some fibers, thereby extending the service life of the front filter screen and the rear filter screen.

[0036] The front filter cotton 31 and the rear filter cotton 41 are both made of glass fiber filter cotton; glass fiber filter cotton is a filter material used to filter tiny particles in air, liquid or gas, and has the characteristics of high-efficiency filtering performance, high temperature resistance, corrosion resistance, wear resistance, etc., which extends the service life of the front filter and the rear filter.

[0037] The width of the front filter cotton 31 is 6-10 cm, and the thickness is 0.5-1.5 cm. The interval between the arranged front filter cotton 31 is 5.5-8.5 cm, and the front filter cotton 31 protrudes 0.5-1 cm from the front fixing frame 32; the width of the rear filter cotton 41 is 6-10 cm, and the thickness is 0.5-1.5 cm. The interval between the arranged rear filter cotton 41 is 5.5-8.5 cm, and the rear filter cotton 41 protrudes 0.5-1 cm from the rear fixing frame 42; the thickness of the front filter cotton 31 and the rear filter cotton 41 is 0.5-1.5 cm to ensure the filtering effect of the front filter cotton 31 and the rear filter cotton 41, and when the front filter cotton 31 is rotated by the front fixing frame 32 to close the front filter screen, or when the rear filter cotton 41 frame rotates and the rear filter cotton 41 closes the rear filter screen, it is ensured that the front filter screen and the rear filter screen will not leak air.

[0038] Magnets are embedded in the cotton layers on the upper and lower sides of the front filter cotton 31, and the magnets in adjacent front filter cottons 31 are magnetically attracted to each other; another magnet is embedded in the cotton layers on the upper and lower sides of the rear filter cotton 41, and the magnets in adjacent rear filter cottons 41 are magnetically attracted to each other; when the front filter or the rear filter is closed, the magnets attract the adjacent front filter cottons 31 or the rear filter cottons 41 together, further ensuring that there is no air leakage when the front filter and the rear filter are closed.

[0039] During use, when air is introduced into the air inlet channel 1, the laser dust sensor continuously detects the air quality at the air inlet 2 of the air inlet channel 1, and first filters it through the fixed filter 6. When the air quality is good, the laser dust sensor system 5 controls the front drive motor 33 and the rear drive motor 43 through the switch control system to open the front filter and the rear filter to ensure air circulation, reduce air running resistance, and reduce energy consumption. When the air quality deteriorates, the laser dust sensor system 5 controls the front drive motor 33 or the rear drive motor 43 through the switch control system to close the front filter or the rear filter for air filtering. When the air quality is very poor, the laser dust sensor system 5 controls the front drive motor 33 and the rear drive motor 43 through the switch control system to close the front filter and the rear filter for air filtering, so as to automatically adjust the filtering strength of the filter according to the air quality, so that the air inlet channel 1 can automatically adjust the filtering strength of the filter in multiple stages according to the degree of dust exceeding the standard in the air quality, which is more intelligent and enables the air inlet system to realize intelligent automatic adjustment of the filter and save more energy.

[0040] Example 2

[0041] refer to Figure 1 and Figure 2 , which is the second embodiment of the present utility model, and this embodiment is based on the previous embodiment.

[0042] The front fixing frame 32 is provided with a rotating shaft, which is exposed from the side wall of the air inlet channel 1. The front driving mechanism also includes a gear connected to the rotating shaft of the front fixing frame 32, called a front driven gear 36; the front driving mechanism is also provided with a rack that can slide with the air inlet channel 1, called a front rack 35, and the driven gear is engaged with the front rack 35; the rear fixing frame 42 is provided with another rotating shaft, which is also exposed from the side wall of the air inlet channel 1, and the rear driving mechanism also includes a gear connected to the other rotating shaft of the rear fixing frame 42, called a rear driven gear 46; the rear driving mechanism is also provided with a gear that can slide with the air inlet channel 1 In conjunction with another rack, called the rear rack 45, the rear driven gear 46 is engaged with the rear rack 45; the front driven gear 36 and the rear driven gear 46 are driven to rotate by the front rack 35 and the rear rack 45, so that the front filter cotton 31 of the front filter rotates synchronously, and the rear filter cotton 41 of the rear filter also rotates synchronously, so that the opening or closing position of the front filter and the rear filter is more accurate, avoiding air leakage when the front filter and the rear filter are closed, resulting in unclean air filtration, or insufficient opening and wasting energy, and the front filter cotton 31 and the rear filter cotton 41 on the front filter and the rear filter can be set to be larger than the above method.

[0043] The front drive mechanism also includes a gear connected to the drive shaft of the front drive motor 33, called the front driving gear 34, which meshes with the front rack 35, so that the front drive motor 33 drives the front fixed frame 32 to drive the front filter cotton 31 to rotate; the rear drive mechanism also includes a gear connected to the drive shaft of the rear drive motor 43, called the rear driving gear 44, which meshes with the rear rack 45, so that the rear drive motor 43 drives the rear fixed frame 42 to drive the rear filter cotton 41 to rotate; by setting the front driving gear 34 and the rear driving gear 44, it is ensured that the front drive motor 33 and the rear drive motor 43 can drive the front rack 35 and the rear rack 45 to move, so that the front drive motor 33 drives the front filter cotton 31 to rotate, and the rear drive motor 43 drives the rear filter cotton 41 to rotate, providing a basis for automatically adjusting the filter screen.

[0044] When in use, when the front filter needs to be opened, the front driving motor 33 drives the front driving gear 34 to rotate, and the driving gear drives the front rack 35 to move, and the front rack 35 drives the four front driven gears 36 to rotate, and the four front driven gears 36 respectively drive the four front fixing frames 32 to rotate 90 degrees. The rotation of the four front fixing frames 32 drives the four front filter cottons 31 of each wind type to rotate 90 degrees, opening the front filter. When closing the front filter, the four front driving motors 33 drive the four front driving gears 34 to rotate in the opposite direction, and the four front filter cottons 31 rotate 90 degrees in the opposite direction. The two magnets in the two adjacent front filter cottons 31 are magnetically attracted to close the front filter to ensure that no air leakage occurs; similarly, the front driving motor 33 opens or closes the rear filter through the rear driving gear 44, so that the opening or closing position of the front filter and the rear filter is more accurate, avoiding air leakage when the front filter and the rear filter are closed, resulting in unclean air filtration, and providing a basis for automatically adjusting the filter.

[0045] It is important to note that the construction and arrangement of the present application shown in a number of different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, colors, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of the element may be inverted or otherwise changed, and the nature or number or position of the discrete elements may be altered or changed. Therefore, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "means plus function" clause is intended to cover the structure described herein that performs the function, and is not only structurally equivalent but also an equivalent structure. Without departing from the scope of the present invention, other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0046] Additionally, in order to provide a concise description of example embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0047] It will be appreciated that in the development of any actual embodiment, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will, for those of ordinary skill having the benefit of this disclosure, be a routine undertaking of design, fabrication, and production without undue experimentation.

[0048] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, and all of these should be included in the scope of the claims of the present invention.

Claims

1. An energy-saving air intake system that adjusts the filter strength according to air quality includes an air intake channel, wherein the position close to the air inlet in the air intake channel is the front side, and the position away from the air inlet is the rear side. A fixed filter is arranged in the inner cavity of the air intake channel, which is called a fixed filter. The system is characterized in that: A filter screen for filtering air is arranged in the inner cavity of the air inlet channel, and the filter screen includes a filter screen arranged at the rear side of the fixed filter screen in the air inlet channel, which is called a front filter screen; The front filter screen is provided with movable filter cotton, called the front filter cotton, and the front filter cotton is provided with a frame structure for fixing the front filter cotton, called the front fixing frame, and the front fixing frame is rotatably connected in the air inlet channel; The front filter is also provided with a driving mechanism for driving the front fixing frame to rotate, which is called the front driving mechanism; The front drive mechanism is also provided with a motor that drives the front drive mechanism to work, which is called the front drive motor; A laser dust sensor system is also provided, which outputs a switch control signal through a signal output terminal when the dust concentration exceeds the standard. The laser dust sensor system is arranged in front of the fixed filter of the air inlet channel, and the ventilation port of the laser dust sensor system is consistent with the air flow direction at the air inlet of the air inlet channel; The signal output terminal controls the connection to the front drive motor.

2. The energy-saving air intake system for adjusting the filter intensity according to air quality according to claim 1 is characterized in that: The filter screen also includes a filter screen arranged at the rear side of the front filter screen in the air inlet channel, which is called the rear filter screen; The rear filter screen is provided with another movable filter cotton, called the rear filter cotton, and the rear filter cotton is provided with another frame structure for fixing the rear filter cotton, called the rear fixing frame, and the front fixing frame is rotatably connected to the air inlet channel; The rear filter is also provided with another driving mechanism for driving the rear fixing frame to rotate, which is called the rear driving mechanism; The rear drive mechanism is also provided with another motor which drives the rear drive mechanism to work, which is called the rear drive motor; The laser dust sensor system has a switch control system. The signal output end of the laser dust sensor is connected to the signal receiving end of the switch control system. The signal output end of the switch control system outputs a switch control signal.

3. The energy-saving air intake system for adjusting the filter intensity according to air quality according to claim 2 is characterized in that: The front fixing frame is provided with a rotating shaft, and the rotating shaft penetrates from the side wall of the air inlet channel. The front driving mechanism also includes a gear connected to the rotating shaft of the front fixing frame, which is called a front driven gear; The front drive mechanism is also provided with a rack which is slidably matched with the air inlet channel, called a front rack, and the driven gear is meshed with the front rack; The rear fixing frame is provided with another rotating shaft, and the other rotating shaft also penetrates from the side wall of the air inlet channel. The rear driving mechanism also includes a gear connected to the other rotating shaft of the rear fixing frame, which is called a rear driven gear; The rear driving mechanism is also provided with another rack which is slidably matched with the air inlet passage, called the rear rack, and the rear driven gear is meshed with the rear rack.

4. The energy-saving air intake system for adjusting the filter intensity according to air quality according to claim 3 is characterized in that: The front drive mechanism also includes a gear connected to the drive shaft of the front drive motor, called a front driving gear, which is meshed with the front rack, so that the front drive motor drives the front fixing frame to drive the front filter cotton to rotate; The rear drive mechanism also includes a gear connected to the drive shaft of the rear drive motor, called a rear driving gear, which is meshed with the rear rack, so that the rear drive motor drives the rear fixing frame to drive the rear filter cotton to rotate.

5. The energy-saving air intake system for adjusting the filter intensity according to air quality according to claim 1 is characterized in that: The fixed filter screen is a wire mesh made of stainless steel.

6. The energy-saving air intake system for adjusting the filter intensity according to air quality according to claim 2 is characterized in that: The front filter cotton and the rear filter cotton are both made of glass fiber filter cotton.

7. The energy-saving air intake system for adjusting the filter intensity according to air quality according to claim 6, characterized in that: The width of the front filter cotton is 6-10 cm, the thickness is 0.5-1.5 cm, the interval between the arranged front filter cottons is 5.5-8.5 cm, and the front filter cotton protrudes 0.5-1 cm from the front fixing frame; The width of the rear filter cotton is 6-10 cm, the thickness is 0.5-1.5 cm, the interval between the arranged rear filter cottons is 5.5-8.5 cm, and the rear filter cotton protrudes 0.5-1 cm from the rear fixing frame.

8. The energy-saving air intake system for adjusting the filter intensity according to air quality according to claim 7, characterized in that: Magnets are embedded in the cotton layers on both sides of the front filter cotton, and the two magnets in two adjacent front filter cottons are magnetically attracted to each other; Another magnet is embedded in the cotton layers on both sides of the rear filter cotton, and the two magnets in two adjacent rear filter cottons are magnetically attracted to each other.

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