Air purifier

Abstract

The utility model belongs to the technical field of air purification, and particularly discloses an air purifier which is characterized in that a cabinet is provided with a cavity, an air inlet and an air outlet, the air inlet and the air outlet are communicated with the cavity, the cavity is divided into an S-shaped air circulation channel by a plurality of partition plates, and a primary filter cartridge, a chemical filter and a high-efficiency filter are sequentially arranged in the air circulation channel; the pulse ash removal assembly removes ash on the primary filter cartridge, the pressure difference detection assembly monitors the pressure difference between the air inlet side of the primary filter cartridge and the air inlet side of the chemical filter in real time, and the high-efficiency purification and long-term stable operation requirements under the rail transit scene are met.

Description

Technical Field

[0001] This utility model belongs to the field of air purification technology, and specifically relates to an air purifier. Background Technology

[0002] Rail transit is a type of public transportation facility with fixed lines, fixed tracks, and equipped with transport vehicles and service facilities. It plays a backbone role in the urban public passenger transport system and belongs to a modern three-dimensional transportation system. Rail transit is usually built in urban areas; however, due to various factors such as terrain, building distribution, and passenger flow distribution, its lines are often laid in relatively enclosed underground spaces or tunnels, or in areas with severe industrial pollution. Therefore, the air in rail transit cabins is easily polluted.

[0003] Rail transit requires monitoring and operation by drivers and passengers. These drivers and passengers work in easily polluted cabins for extended periods of time. If the cabin air is not properly treated, it may become filled with various harmful substances, such as particulate matter, harmful gases (like formaldehyde and benzene), bacteria, and viruses. These harmful substances can seriously harm the health of drivers and passengers.

[0004] To address the issue of harmful substances in cabin air, existing technologies equip cabins with air purification systems. For example, this involves installing pre- and medium-efficiency filters at the cabin's air inlets and outlets; or installing localized purification devices such as activated carbon adsorption boxes, ultraviolet lamps, and vehicle-mounted negative ion generators to achieve air purification. However, this air treatment method still has the following problems:

[0005] 1. Traditional air purifiers mostly use a single purification technology, which makes it difficult to quickly and effectively purify the complex air composition in the cabin, and thus cannot meet the standard requirements for cabin air purification.

[0006] 2. In order to improve purification efficiency, some purification devices sacrifice size advantage in design, occupy a lot of cabin space, and thus affect the overall coordination of the cabin interior design.

[0007] 3. The cabin air purification system lacks monitoring devices. Currently, it only performs periodic maintenance or replacement of the filter components. This practice often leads to missing the best time to maintain or replace the filter components, affecting filtration efficiency or increasing replacement costs. Utility Model Content

[0008] The purpose of this invention is to provide an air purifier that meets the requirements of high-efficiency purification and long-term stable operation in rail transit scenarios.

[0009] The purpose of this utility model is achieved through such a technical solution, specifically providing an air purifier, including: a cabinet, the cabinet having a cavity and an air inlet and an air outlet communicating with the cavity;

[0010] The cavity is divided into S-shaped air circulation channels by several partitions, and a pre-filter, a chemical filter and a high-efficiency filter are installed in sequence in the air circulation channels.

[0011] Pulse cleaning assembly, used for cleaning primary filter cartridges;

[0012] Differential pressure detection component: This component monitors the pressure difference between the air inlet side of the primary filter cartridge and the air inlet side of the chemical filter in real time.

[0013] Preferably, the partition includes a first partition and a second partition, dividing the cavity into a first filter chamber, a second filter chamber, and an exhaust chamber. The first filter chamber is connected to the air inlet, the top of the first filter chamber is connected to the top of the second filter chamber, the bottom of the second filter chamber is connected to the bottom of the exhaust chamber, and the exhaust chamber is connected to the air outlet. A primary filter cartridge is disposed in the first filter chamber, which takes in air from all sides and exhausts air from the top. A high-efficiency filter and a chemical filter are disposed in the second filter chamber, with the high-efficiency filter exhausting air downwards.

[0014] Preferably, the pulse cleaning assembly includes an air tank, a pulse solenoid valve, and a blowpipe. The air tank is installed on the outside of the cabinet, the blowpipe is connected to the air tank outlet, the blowpipe is equipped with a nozzle, the nozzle is located in the top exhaust port of the primary filter cartridge, and the pulse solenoid valve is installed at the connection between the blowpipe and the air tank.

[0015] Preferably, the pulse cleaning assembly further includes an oil mist separator, and the air inlet of the air tank is connected to the oil mist separator.

[0016] Preferably, a ash storage compartment is provided directly below the primary filter cartridge.

[0017] Preferably, it also includes an exchange fan, which is disposed in the exhaust chamber.

[0018] Preferably, the cabinet also includes a sealing plate, which includes a front sealing plate and a left sealing plate. The front sealing plate is provided with an openable and closable primary filter cartridge maintenance door and an openable and closable filter maintenance door, and the left sealing plate is provided with an openable and closable fan inspection door.

[0019] Preferably, the primary filter cartridge inspection door, the filter inspection door, and the fan inspection door are provided with a sealing ring along their circumference.

[0020] Preferably, the air inlet is a louvered air vent with the opening facing downwards.

[0021] Preferably, the chemical filter and the high-efficiency filter are installed in a pull-out manner.

[0022] Due to the adoption of the above technical solution, this utility model has the following advantages:

[0023] Employing a multi-stage filtration system consisting of a pre-filter, a high-efficiency filter, and a chemical filter, it effectively removes particulate matter, bacteria, viruses, and harmful gases from the air, meeting the standard requirements for cabin air purification and improving the comfort of passengers. The cavity is divided into an S-shaped airflow channel, effectively reducing the space occupied by the cabinet. The installation of pulse cleaning components and differential pressure detection components not only avoids the waste of resources caused by premature replacement of filter components before they are fully saturated, but also prevents the risk of decreased purification efficiency, increased energy consumption, or even damage to filter components due to overuse. At the same time, it provides health management data for passengers. Attached Figure Description

[0024] To more clearly illustrate the specific embodiments of this utility model, the accompanying drawings used in the specific embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to scale.

[0025] Figure 1 This is a schematic diagram of the structure of an air purifier according to the present invention;

[0026] Figure 2 This is a schematic diagram of the sealing plate;

[0027] Figure 3 This is a schematic diagram of an air circulation channel;

[0028] Figure 4 This is a schematic diagram of the partition;

[0029] Figure 5 This is a schematic diagram of the pulse cleaning assembly.

[0030] Figure 6 This is a schematic diagram of the rear panel.

[0031] Figure 7 This is a schematic diagram of the primary filter cartridge installed on the first horizontal plate;

[0032] Figure 8 This is a schematic diagram of the suspension plate;

[0033] Figure 9 This is a schematic diagram of the filter support plate.

[0034] Figure label:

[0035] 1-Rack, 11-Cavity, 111-First Filter Chamber, 112-Second Filter Chamber, 113-Exhaust Chamber, 114-Primary Filter Cartridge Placement Chamber, 115-Primary Filter Cartridge Exhaust Chamber, 116-Exchange Fan Placement Chamber, 117-Purified Air Storage Chamber, 12-Air Inlet, 13-Air Outlet, 14-Metal Frame, 141-Blocking Bar, 15-Sealing Plate, 151-Front Side Sealing Plate, 1511-Primary Filter Cartridge Inspection Door, 1512-Filter Inspection Door, 152-Rear Side Sealing Plate, 1521-Electrical Control Inspection Door, 153 -Left side sealing plate, 1531-Fan detection door panel, 154-Right side sealing plate, 155-Upper side sealing plate, 156-Lower side sealing plate, 1561-Mounting hole, 16-Mounting lug, 17-Heat dissipation vent, 18-Partition plate, 181-First partition plate, 182-Second partition plate, 183-Second horizontal plate, 184-First horizontal plate, 1841-First through hole, 1842-Hanging plate, 1843-Protrusion, 1844-Annular groove, 186-Filter support plate, 1861-Groove, 1862-Rotating shaft, 1863-Rotating wheel;

[0036] 2-Electrical control module; 3-Primary filter cartridge; 31-Cover plate; 4-High-efficiency filter; 5-Chemical filter;

[0037] 6-Pulse cleaning assembly, 61-Air manifold, 62-Pulse solenoid valve, 63-Pulse jet pipe, 64-Nozzle, 65-Pressure reducing valve;

[0038] 7-Differential pressure detection component; 8-Ash storage compartment; 81-Handle; 9-Exchange fan. Detailed Implementation

[0039] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0040] Please see Figures 1 to 4 An air purifier includes a cabinet 1, a primary filter cartridge 3, a chemical filter 5, a high-efficiency filter 4, a pulse cleaning assembly 6, and a differential pressure detection assembly 7.

[0041] The cabinet 1 is provided with a cavity 11 and an air inlet 12 and an air outlet 13 connected to the cavity 11; the cabinet 1 is provided with partitions 18, and several partitions 18 divide the cavity 11 into an S-shaped air circulation channel, in which a primary filter cartridge 3, a chemical filter 5 and a high-efficiency filter 4 are arranged in sequence; the pulse cleaning assembly 6 cleans the primary filter cartridge (3); the differential pressure detection assembly 7 monitors the differential pressure between the air inlet side of the primary filter cartridge 3 and the air inlet side of the chemical filter 5 in real time.

[0042] Specifically, the cabinet 1 has a structural frame composed of a metal frame 14. The air inlet 12 is located in the middle of the right end face of the cabinet 1, and the air outlet 13 is located on the front end face of the cabinet 1. The air outlet 13 and the air inlet 12 are staggered to avoid direct air convection. The cabinet 1 is equipped with a heat dissipation vent 17, which is located on the front end face of the cabinet 1 to achieve equipment heat dissipation.

[0043] The pre-filter cartridge 3 can be a cartridge with an outer membrane filter material, used for preliminary filtration of dusty air containing 0.1 to 0.5 micron dust particles. It should be noted that the term "pre-filter cartridge" in this invention only indicates that the cartridge performs preliminary filtration of air and does not impose any restrictions on the grade of the cartridge / filter. In actual use, the grade of the cartridge / filter can be a pre-filter of G1 to G4 level, or a medium- or high-efficiency filter of F5 to F9 level.

[0044] The chemical filter 5 is mainly composed of special activated carbon, modified filter media, ion exchange resin or photocatalytic filter material, which mainly removes target gases such as acidic / alkaline / volatile organic compounds from the air; it can also be a photocatalytic filter in an air purifier, authorized by announcement number CN110917874B.

[0045] The high-efficiency filter 4 is composed of multiple filter media without separators. After the air is filtered by the pre-filter cartridge 3 and the chemical filter 5, finer dust particles still remain. The high-efficiency filter 4 mainly performs deep filtration on these dust particles. Compared with ordinary filters with separators, the filter media area is increased, which significantly reduces operating resistance and energy consumption. The filtration level can be any level from H10 to H14 and U15 to U17.

[0046] The air purifier also includes an electronic control module 2, comprising a power supply unit and a controller. The power supply unit supplies power to relevant components of the air purifier, and the controller is electrically connected to relevant components of the air purifier, such as the pulse cleaning component 6 and the differential pressure detection component 7. The differential pressure detection component 7 adopts existing technology, such as the differential pressure control system in an intelligent dust removal and ash discharge system for a cartridge dust collector (authorized publication number CN109758840B). Preferably, the differential pressure detection component 7 is equipped with two differential pressure sensors, one for monitoring the pressure difference between the air inlet side of the primary filter cartridge 3 and the air inlet side of the chemical filter 5, and the other for monitoring the pressure difference between the air inlet side of the chemical filter 5 and the air outlet side of the high-efficiency filter 4. When the differential pressure detection component 7 detects that the pressure difference between the inlet side of the primary filter cartridge 3 and the inlet side of the chemical filter 5 reaches a preset value (e.g., 300 Pa), the controller receives information from the differential pressure detection component 7 based on the set pressure value. The controller then activates the pulse cleaning component 6 to blow air through the primary filter cartridge 3. When the pressure difference between the inlet side of the chemical filter 5 and the outlet side of the high-efficiency filter 4 reaches the preset value (e.g., 300 Pa), the controller issues a maintenance reminder for either the chemical filter 5 or the high-efficiency filter 4. It should be understood that the above-mentioned preset pressure difference value is only an example and can be adjusted according to the specifications of the filter cartridge and filter in actual use.

[0047] This utility model discloses an air purifier. During use, air enters the cabin through the air inlet 12 and is filtered through a multi-stage filtration system, including a pre-filter cartridge 3, a high-efficiency filter 4, and a chemical filter 5. This effectively removes particulate matter, bacteria, viruses, and harmful gases from the air, purifying particulate matter and harmful gases such as acidic / alkaline / volatile organic compounds in stages. The filtered air is then discharged through the air outlet 13, meeting the standard requirements for cabin air purification and improving the comfort of passengers. The cavity 11 is divided into an S-shaped airflow channel, increasing the length of the airflow channel within the limited volume of the cavity 11. This not only improves the filtration efficiency but also allows for the installation of more filter components, effectively reducing the space occupied by the cabinet 1. A pulse cleaning component 6 and a differential pressure detection component 7 are included. The differential pressure detection component 7 monitors the pressure difference between the air inlet and outlet sides of the filter components in real time. The primary filter cartridge 3, chemical filter 5, and high-efficiency filter 4, as core purification units, gradually become clogged due to the continuous accumulation of pollutants such as dust, aerosols, or chemical gases, leading to increased airflow resistance. The differential pressure detection component 7 monitors the pressure values ​​collected between the inlet side of the primary filter cartridge 3 and the inlet side of the chemical filter 5, and between the inlet side of the chemical filter 5 and the outlet side of the high-efficiency filter 4, and calculates the differential pressure value between them in real time. When the differential pressure reaches a preset threshold, the controller determines that each filter component is close to saturation or clogged, triggering a maintenance prompt or activating the pulse cleaning component 6. This method replaces the traditional maintenance mode based on fixed time or experience estimation, achieving "on-demand maintenance." It avoids the waste of resources caused by premature replacement of filter components before they are saturated, and also prevents the risk of decreased purification efficiency, increased energy consumption, or even damage to filter components due to overuse. At the same time, the differential pressure data monitored by the differential pressure detection component 7 is uploaded to the controller to generate historical curves and early warning reports, providing precise equipment health management support for drivers and passengers.

[0048] Further, please refer to Figures 1 to 4The partition 18 includes a first partition 181 and a second partition 182, dividing the cavity 11 into a first filter chamber 111, a second filter chamber 112, and an exhaust chamber 113. The first filter chamber 111 is connected to the air inlet 12, the top of the first filter chamber 111 is connected to the top of the second filter chamber 112, the bottom of the second filter chamber 112 is connected to the bottom of the exhaust chamber 113, and the exhaust chamber 113 is connected to the air outlet 13. The primary filter cartridge 3 is disposed in the first filter chamber 111, and the primary filter cartridge 3 takes in air from all sides and exhausts air from the top. The high-efficiency filter 4 and the chemical filter 5 are disposed in the second filter chamber 112, and the high-efficiency filter 4 exhausts air downwards. Specifically, the first partition 181 and the second partition 182 are perpendicular to the upper surface of the cabinet 1. The two sides of each partition 18 are sealed with sealant, dividing the cavity 11 into a series of sealed filtration functional areas. Through sealing, it is prevented that unfiltered gas from the previous step will leak into the next filtration functional area. The first filter chamber 111 is provided with a first horizontal plate 184 perpendicular to the first partition 181. The first horizontal plate 184 divides the first filter chamber 111 into a primary filter cartridge placement chamber 114 and a primary filter cartridge exhaust chamber 115. The first horizontal plate 184 is provided with a first through hole 1841 that matches the exhaust port of the primary filter cartridge. The gas filtered by the primary filter cartridge 3 enters the primary filter cartridge exhaust chamber 115 through the first through hole 1841. The inner perimeter of the first horizontal plate 184 is covered with sealant to seal and separate the primary filter cartridge placement chamber 114 and the primary filter cartridge exhaust chamber 115 except for the first through hole 1841, preventing unfiltered gas from leaking into the primary filter cartridge exhaust chamber 115. The primary filter cartridge exhaust chamber 115 is connected to the second filter chamber 112. The high-efficiency filter 4 and the chemical filter 5 are arranged in series. Preferably, the filter elements of the high-efficiency filter 4 and the chemical filter 5 are equipped with RFID tags to record their service life and achieve precise management of the filters.

[0049] Further, please refer to Figure 4 and Figure 9The chemical filter 5 and the high-efficiency filter 4 are installed using a pull-out design. Both the high-efficiency filter 4 and the chemical filter 5 are mounted on the upper part of the second filter chamber 112 via filter support plates 186. The filter support plates 186 are bent "U"-shaped sheet metal structures, with the openings of two filter support plates 186 facing each other and riveted to the first partition 181 and the second partition 182 respectively, forming a set of parallel slide rails. These parallel slide rails are repeatedly arranged. The filter support plates 186 are used to hold the chemical filter 5 and the high-efficiency filter 4, which are connected in series. Preferably, the filter support plates 186 are provided with multiple grooves 1861, each groove 1861 containing a rotating shaft 1862. The rotating shaft 1862 is rotatably mounted in the groove 1861, and a rotating wheel 1863 is mounted in the rotating shaft 1861. This structure reduces frictional resistance, ensuring smooth pulling of the chemical filter 5 and the high-efficiency filter 4. The pull-out installation and sliding structure are suitable for the limited maintenance space of rail vehicles, allowing a single person to quickly complete the filter replacement operation. Preferably, in order to prevent the chemical filter 5 and the high-efficiency filter 4 from sliding accidentally during operation, a stop bar 141 is hinged to the metal frame 14. During operation, the stop bar 141 is rotated parallel to the filter to limit the movement of the filter. When the filter needs to be maintained, the stop bar 141 is rotated perpendicular to the filter.

[0050] Further, please refer to Figure 4 and Figure 5 The pulse cleaning assembly 6 includes an air tank 61, a pulse solenoid valve 62, and a blowpipe 63. The air tank 61 is installed on the outside of the cabinet 1. The blowpipe 63 is connected to the output port of the air tank 61. The blowpipe 63 is equipped with a nozzle 64, which is located in the top exhaust port of the primary filter cartridge 3. The pulse solenoid valve 62 is installed at the connection between the blowpipe 63 and the air tank 61. Specifically, depending on the number of primary filter cartridges 3 installed, each primary filter cartridge 3 is equipped with one nozzle 64. Preferably, the nozzle 64 extends into the first through hole 1841 of the first horizontal plate 184, so that airflow can be blown from above onto the inner wall of the primary filter cartridge 3. Preferably, the pulse solenoid valve 62 is installed at the inlet port of the blowpipe 63. During use, according to the set program or when the dust on the surface of the primary filter cartridge 3 accumulates to a certain level, the controller issues a command, the pulse solenoid valve 62 is activated, and the compressed air in the air tank 61 is released, forming an instantaneous high-pressure airflow. The high-pressure airflow quickly rushes into the interior of the primary filter cartridge 3 through the blowpipe 63. The rapid expansion and impact of the airflow cause the dust layer on the outside of the primary filter cartridge 3 to fall off. After the dust removal is completed, the pulse solenoid valve 62 closes, and the primary filter cartridge 3 returns to the filtration state.

[0051] Furthermore, the pulse cleaning assembly 6 also includes a pressure reducing valve 65, with the air inlet of the air reservoir 61 connected to the pressure reducing valve. The pressure reducing valve mainly functions to dynamically stabilize the pressure. High-pressure gas from an external air source, such as an air compressor, enters the air reservoir 61 through the pressure reducing valve 65. When the air reservoir 61 is consumed during cleaning and the pressure drops, the opening of the pressure reducing valve 65 increases to replenish the gas. When the pressure in the air reservoir 61 rises to a preset value, the opening of the pressure reducing valve 65 decreases or even closes to restrict the intake of gas. The stabilized gas is continuously input into the air reservoir 61, keeping the air pressure within the preset range and preventing pressure fluctuations from damaging the filter media or sealing structure.

[0052] Further, please refer to Figure 1 , Figure 4 , Figure 7 and Figure 8 A dust collection compartment 8 is located directly below the primary filter cartridge 3. Specifically, the dust collection compartment 8 is a drawer-type sheet metal structure, and the top opening of the dust collection compartment 8 is aligned with the dust collection area of ​​the primary filter cartridge 3. The top opening of the primary filter cartridge 3 cooperates with the first through hole 1841 to release air, and a cover plate 31 is provided at its bottom end. The cover plate 31 covers the bottom opening of the primary filter cartridge 3. The height of the primary filter cartridge placement cavity 114 is greater than the height of the primary filter cartridge 3. After the primary filter cartridge 3 is installed, there is a suitable distance between the bottom surface of the primary filter cartridge 3 and the bottom of the dust collection compartment 8. The first horizontal plate 184 is also provided with a hanging plate 1842. Several protrusions 1843 are evenly spaced along the inner wall of the hanging plate 1842. The protrusions 1843 and the inner wall of the hanging plate 1842 form an annular groove 1844. The top of the primary filter cartridge 3 is provided with a protrusion that mates with the annular groove 1844. The outer diameter of the top of the hanging plate 1842 is larger than the inner diameter of the first through hole 1841, and the outer diameter of the lower part of the hanging plate 1842 is slightly smaller than the inner diameter of the first through hole 1841. In use, the hanging plate 1842 is welded to the first horizontal plate 184, the primary filter cartridge 3 is placed in the primary filter cartridge placement cavity 114, and the primary filter cartridge 3 is rotated. The annular groove 1844 engages with the protrusion, and the primary filter cartridge 3 is suspended above the ash storage compartment 8. The ash is temporarily stored in the ash storage compartment 8. The ash storage compartment 8 is designed as a drawer-type sheet metal structure. The drawer-type sheet metal structure design fully considers the characteristics of the confined space and high-frequency vibration of rail vehicles. Its vertical alignment with the primary filter cartridge 3 allows dust to fall due to gravity or vibration during vehicle operation, reducing auxiliary power consumption. Furthermore, the ash storage compartment capacity can meet the dust storage needs under long-term operating conditions, significantly reducing the frequency of daily maintenance and providing a reliable guarantee for the long-term stable operation of the vehicle. Preferably, to prevent the ash storage compartment 8 from accidentally sliding out due to vehicle operating vibration, existing technology of a desk drawer mechanical locking device is adopted, where rotating the handle drives the internal pin to engage with the slot on the inner side wall of the front soil seal plate. To facilitate the removal of the ash storage compartment 8, a groove or handle 81 for easy manual operation is provided.

[0053] Furthermore, to ensure airtightness, the inner edges of the ash storage door panel of the ash storage compartment 8 are covered with flexible sealing strips. When it is fully closed, the sealing strips fit tightly against the metal frame 14 to prevent unpurified air from leaking through the gaps or external pollutants from entering.

[0054] Further, see Figure 1 The system also includes a heat exchange fan 9, located in the exhaust chamber 113. The output port of the heat exchange fan 9 is connected to the air outlet 13. Specifically, the cabinet 1 also includes a second horizontal plate 183. The edges of the second horizontal plate 183 are covered with sealant. The second horizontal plate 183 divides the exhaust chamber 113 into a heat exchange fan placement chamber 116 and a purified air storage chamber 117. The second horizontal plate 183 has a second through hole that matches the air intake of the heat exchange fan. The second horizontal plate 183 seals and separates the heat exchange fan placement chamber 116 and the purified air storage chamber 117 except for the second through hole, preventing unfiltered gas from the heat exchange fan placement chamber 116 from leaking into the purified air storage chamber 117. The heat exchange fan 9 draws in purified air, pressurizes it, and then discharges it, increasing the airflow speed in the air circulation channel. The heat exchange fan 9 and the air circulation channel are integrated to ensure efficient airflow power transmission. By adjusting the output power of the heat exchange fan, the output hertz can be increased or decreased depending on the application scenario, thereby changing the fan airflow. Preferably, the inner wall of the exhaust chamber 113 is covered with sound-absorbing cotton to isolate vibration and reduce noise.

[0055] Further, see Figure 1 , Figure 2 , Figure 3 and Figure 6The cabinet 1 includes a sealing plate 15, which includes a front sealing plate 151 and a left sealing plate 153. The front sealing plate 151 is also provided with an openable and closable primary filter cartridge maintenance door 1511 and an openable and closable filter maintenance door 1512. The left sealing plate 153 is provided with an openable and closable fan inspection door 1531. Specifically, the sealing plate 15 includes a front sealing plate 151, a rear sealing plate 152, a left sealing plate 153, a right sealing plate 154, an upper sealing plate 155, and a lower sealing plate 156. The metal frame 14 provides stable support for the sealing plate 15. The lower sealing plate 156 extends from both sides of the cabinet 1, and has mounting holes 1561 in the extension. The cabinet 1 also includes mounting ears 16. Depending on the actual installation scenario, the mounting ears 16 are welded to the outer wall of the cabinet 1. The mounting holes 1561 and mounting ears 16 facilitate the installation of the cabinet 1 in a suitable position in the cabin. Preferably, the cabinet 1 is mounted on the top of the cabin. The air inlet 12 is located in the middle of the right sealing plate 154, and the air outlet 13 is located on the front sealing plate 151. The primary filter cartridge maintenance door 1511 is mounted on the front sealing plate 151 by several hinges, which is used to open it for easy maintenance of the primary filter cartridge 3. Similarly, the filter maintenance door 1512 and the fan inspection door 1541 have the same rotating arrangement. A power supply device and control module are provided on the rear side of the exhaust chamber 113. The rear sealing plate 152 also has an electrically controlled maintenance door 1521, which is the same as the primary filter cartridge maintenance door 1511. The system employs removable access panels for the equipment requiring maintenance, eliminating the need for complete disassembly of the sealing plate 15. Maintenance of the corresponding equipment can be performed simply by opening each access panel, thereby reducing maintenance intensity and improving efficiency. Preferably, to prevent accidental opening of the access panels due to vehicle vibrations, existing technology of mechanical locking devices for desk drawers is used. A rotating handle drives an internal pin to engage with a slot on the inner wall of the sealing plate 15. For easy manual operation, each access panel is provided with a groove or handle.

[0056] Furthermore, to ensure airtightness, the primary filter cartridge inspection door panel 1511, the filter inspection door panel 1512, and the fan inspection door panel 1531 are provided with sealing rings along their circumference.

[0057] Furthermore, the air inlet 12 is a downward-facing louvered air inlet. Preferably, the air inlet 12 is a self-closing louvered air inlet, which opens and closes adaptively by gravity to prevent backflow of air or pollutants from entering the compartment through the air inlet 12.

[0058] This utility model discloses an air purifier that employs a multi-stage filtration system including a pre-filter cartridge 3, a high-efficiency filter 4, and a chemical filter 5. This system effectively removes particulate matter, bacteria, viruses, and harmful gases from the air. The filtered air is drawn in and pressurized by an exchange fan 9 before being discharged from the outlet 13, meeting the standard requirements for cabin air purification and improving the comfort of passengers. A partition 18 divides the cavity 11 into an S-shaped airflow channel, increasing the length of the airflow channel within the limited volume of the cavity 11. This not only improves filtration efficiency but also effectively reduces the space occupied by the cabinet 1. A pulse cleaning component 6 and a differential pressure detection component 7 are installed. The differential pressure detection component 7 monitors the air pressure difference within the equipment in real time, determining whether the pre-filter cartridge 3, high-efficiency filter 4, and chemical filter 5 are nearing saturation or clogged. This avoids premature replacement of the pre-filter cartridge 3, high-efficiency filter 4, and chemical filter 5 before they become saturated, thus preventing resource waste and the risk of decreased purification efficiency, increased energy consumption, or even filter material damage due to prolonged use. The pulse cleaning assembly 6 removes dust accumulated on the outside of the pre-filter cartridge 3, while the pressure reducing valve 65 dynamically stabilizes the air pressure within a preset range, preventing pressure fluctuations from damaging the filter media or sealing structure. A dust collection grid 8 is provided to collect particles detached during the pulse cleaning process, preventing secondary contamination of the pre-filter cartridge 3 and reducing the frequency of routine maintenance. The overall structure of the air purification device is strictly sealed across functional sections by partitions 18, and combined with differential pressure detection and closed-loop control of pulse cleaning, ensuring unidirectional airflow and long-term stable operation. Removable access panels are provided on the sealing plate 15, eliminating the need for complete disassembly of the sealing plate 15; maintenance can be performed simply by opening the respective access panels, thereby reducing maintenance intensity and improving maintenance efficiency.

[0059] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific implementation method of this utility model and is not intended to limit this utility model. Any modifications, equivalent substitutions, and improvements made within the scope of the spirit of this utility model should be included within the protection scope of this utility model.

Claims

1. An air cleaning machine characterized by, include: The cabinet (1) is provided with a cavity (11) and an air inlet (12) and an air outlet (13) communicating with the cavity (11); A partition (18) divides the cavity (11) into an S-shaped air circulation channel, and a primary filter cartridge (3), a chemical filter (5) and a high-efficiency filter (4) are arranged in sequence in the air circulation channel; The pulse cleaning assembly (6) cleans the primary filter cartridge (3); Differential pressure detection component (7) monitors the pressure difference between the air inlet side of the primary filter cartridge (3) and the air inlet side of the chemical filter (5) in real time.

2. The air cleaning machine according to claim 1, wherein, The partition (18) includes a first partition (181) and a second partition (182), which divides the cavity (11) into a first filter chamber (111), a second filter chamber (112) and an exhaust chamber (113). The first filter chamber (111) is connected to the air inlet (12), the top of the first filter chamber (111) is connected to the top of the second filter chamber (112), the bottom of the second filter chamber (112) is connected to the bottom of the exhaust chamber (113), and the exhaust chamber (113) is connected to the air outlet (13). The primary filter cartridge (3) is installed in the first filter chamber (111), and the primary filter cartridge (3) takes in air from all sides and exhausts air from the top. The high-efficiency filter (4) and the chemical filter (5) are installed in the second filter chamber (112), and the high-efficiency filter (4) exhausts air downwards.

3. The air cleaning machine according to claim 1 or 2, characterized in that, The pulse cleaning assembly (6) includes an air tank (61), a pulse solenoid valve (62), and a blowpipe (63). The air tank (61) is installed on the outside of the cabinet (1). The blowpipe (63) is connected to the output port of the air tank (61). The blowpipe (63) is equipped with a nozzle (64). The nozzle (64) is located in the exhaust port at the top of the primary filter cartridge (3). The pulse solenoid valve (62) is installed at the connection between the blowpipe (63) and the air tank (61).

4. The air cleaning machine of claim 3, wherein, The pulse cleaning assembly (6) also includes a pressure reducing valve (65), and the air inlet of the air tank (61) is connected to the pressure reducing valve (65).

5. The air purifier according to claim 1, 2, or 4, characterized in that, A dust collection compartment (8) is provided directly below the primary filter cartridge (3).

6. The air cleaning machine according to claim 2 or 4, wherein It also includes a heat exchange fan (9), which is located in the exhaust chamber (113).

7. The air cleaning machine according to claim 1, 2 or 4, wherein The cabinet (1) also includes a sealing plate (15), which includes a front sealing plate (151) and a left sealing plate (153). The front sealing plate (151) is provided with an openable and closable primary filter cartridge maintenance door (1511) and an openable and closable filter maintenance door (1512). The left sealing plate (153) is provided with an openable and closable fan inspection door (1531).

8. The air cleaning machine of claim 7, wherein, The primary filter cartridge inspection door panel (1511), the filter inspection door panel (1512), and the fan inspection door panel (1531) are provided with sealing rings along their circumference.

9. The air cleaning machine according to claim 1, 2, 4 or 8, wherein, The air inlet (12) is a louvered air inlet with the opening facing downwards.

10. The air cleaning machine according to claim 1, 2, 4 or 8, wherein, The chemical filter (5) and the high-efficiency filter (4) are installed in a pull-out manner.

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