A ventilation device air purification mechanism

Abstract

This utility model discloses an air purification mechanism for a ventilation device, including a ventilation housing. The air inlet end of the ventilation housing is connected to an air inlet duct via a flange, and the air outlet end of the ventilation housing is connected to an exhaust duct via a flange. A fan is installed inside the exhaust duct. A mesh protective plate is screwed onto one end of both the air inlet and exhaust ducts. This utility model improves air purification efficiency by sequentially arranging a filter screen, an electrostatic dust collection module, a HEPA filter element, and an activated carbon layer within the ventilation housing. The layered spatial arrangement allows for periodic disassembly, cleaning, or replacement of the filter screen. A self-cleaning structure is provided above the filter screen. A nylon brush moves parallel to the filter screen surface via a synchronous belt, and the negative pressure suction port enhances the cleaning effect. When the differential pressure sensors at both ends detect that the filter screen resistance reaches a preset value, cleaning is triggered, achieving self-cleaning of the filter screen, shortening cleaning time, and improving the filter screen flux recovery rate.

Description

Technical Field

[0001] This utility model relates to the field of building ventilation equipment technology, specifically to an air purification mechanism for a ventilation device. Background Technology

[0002] The air purification mechanism of the ventilation device is an automatic cleaning function that includes multiple filtration mechanisms for particulate matter and gaseous pollutants. It is suitable for places that require continuous air purification, such as central air conditioning systems and factory ventilation systems.

[0003] The prior art, disclosed in patent document CN217082818U, presents the following technical solution: a ventilation device with an air purification mechanism. Addressing the problem that existing ventilation devices with air purification mechanisms are inconvenient to disassemble and replace air filters, the following solution is proposed: It includes a ventilation housing, a filter, and a connecting plate. The filter is disposed inside the ventilation housing and contacts the bottom inner wall and the front and rear inner walls of the ventilation housing. A slot is provided at the bottom of the connecting plate, and the filter is movably inserted into the slot. Square grooves are provided on both sides of the slot's inner wall, and square plates are slidably installed within these grooves. Multiple locking rods are fixedly installed on the side of the two square plates that are close to each other. Multiple locking slots are provided on both sides of the filter.

[0004] The above-mentioned technical solution sets a single filter screen inside the ventilation shell. The single-layer filter screen structure can only intercept large particulate impurities, and the filtration effect is generally poor, which reduces the effect of air purification. Utility Model Content

[0005] The purpose of this utility model is to provide an air purification mechanism for a ventilation device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an air purification mechanism for a ventilation device, comprising a ventilation housing, an air inlet duct connected to the air inlet end of the ventilation housing via a flange, an air outlet duct connected to the air outlet end of the ventilation housing via a flange, a fan installed inside the air outlet duct, and a mesh protective plate provided at one end of both the air inlet duct and the air outlet duct via screws.

[0007] The ventilation housing is equipped with a primary filter at the air inlet and a HEPA filter and activated carbon layer at the air outlet. An electrostatic dust collection module is installed between the primary filter and the HEPA filter. The electrostatic dust collection module, the HEPA filter, and the activated carbon layer are all equipped with disassembly and assembly components on their outer sides.

[0008] In the above technical solution, a filter, an electrostatic dust collection module, a HEPA filter, and an activated carbon layer are sequentially arranged inside the ventilation housing. This layered spatial arrangement improves the efficiency of air purification.

[0009] The primary filtration device includes a filter screen with an inclined design. Inclined mounting grooves are provided on both sides of the air inlet end of the ventilation housing. A sliding groove is provided above each inclined mounting groove. A synchronous belt assembly is installed between the two inclined mounting grooves. A motor is installed at the drive end of the synchronous belt assembly. A C-shaped connecting plate is provided on the upper surface of the synchronous belt assembly via screws. The outer wall of the C-shaped connecting plate is slidably connected to the inner wall of the sliding groove. A mounting plate is fixedly connected between the two C-shaped connecting plates. A nylon brush is provided on the side of the mounting plate facing the filter screen, and the nylon brush makes interference contact with the filter screen.

[0010] In the above technical solution, a self-cleaning structure is set above the filter screen. The nylon brush moves parallel to the filter screen surface via a synchronous belt and works in conjunction with the negative pressure suction port to improve the cleaning effect of the filter screen. When the differential pressure sensors at both ends detect that the filter screen resistance reaches a preset value, cleaning is triggered to achieve self-cleaning of the filter screen, shorten the cleaning time, and improve the filter screen flow recovery rate.

[0011] As a further preferred embodiment of this technical solution, the disassembly and assembly assembly includes a mounting frame, which is disposed outside the electrostatic dust collection module, the HEPA filter, and the activated carbon layer. Limiting plates are provided on both the front and rear sides of the mounting frame, and a mounting top plate is provided on the top side of the mounting frame. The mounting top plate is connected to the top of the ventilation housing by screws.

[0012] The disassembly and assembly components in the above technical solution can be disassembled, cleaned, or replaced periodically.

[0013] As a further preferred embodiment of this technical solution, the inner walls of the ventilation housing near the exhaust end on both the left and right sides are provided with limiting grooves, and the inner walls of the limiting grooves are engaged with the outer walls of the limiting plates.

[0014] As a further preferred embodiment of this technical solution, a material discharge groove is provided on the bottom side of the ventilation housing near the air inlet end. A connecting frame is fixedly connected to the inner side of the material discharge groove. T-shaped grooves are provided at both ends of the bottom side of the connecting frame. T-shaped plates are inserted into the inner side of the T-shaped grooves. A collection frame is fixedly connected to the bottom of the T-shaped plates. A guide plate is fixedly connected to the side wall of the connecting frame near the filter screen.

[0015] In the above technical solution, the collection frame can collect the filtered particulate impurities, and the collection frame is connected to the T-shaped groove through the T-shaped plate, which facilitates disassembly and cleaning.

[0016] As a further preferred embodiment of this technical solution, differential pressure sensors are provided on both the side wall near the air inlet end and the side wall near the air outlet end of the ventilation housing, and self-cleaning is driven by the control unit.

[0017] As a further preferred embodiment of this technical solution, the filter screen has an inclination angle of 40°-50°, a mesh diameter of 1-3mm, and the HEPA filter element has an angle of 70°-80° between the pleat direction and the airflow direction.

[0018] As a further preferred embodiment of this technical solution, a negative pressure dust suction port is provided on the bottom side of the middle part of the ventilation housing and below the filter screen, and the negative pressure dust suction port is connected to an external centrifugal fan.

[0019] This utility model provides an air purification mechanism for a ventilation device, which has the following beneficial effects:

[0020] (1) This utility model improves the efficiency of air purification by sequentially arranging a filter screen, an electrostatic dust collection module, a HEPA filter element and an activated carbon layer inside the ventilation housing. The layered spatial arrangement also allows for regular disassembly, cleaning or replacement of the components.

[0021] (2) This utility model sets a self-cleaning structure above the filter screen. The nylon brush moves parallel to the filter screen surface through a synchronous belt and works with the negative pressure suction port to improve the cleaning effect of the filter screen. When the pressure difference sensor at both ends monitors the filter screen resistance to reach the preset value, it triggers cleaning, realizes the self-cleaning of the filter screen, shortens the cleaning time, and improves the filter screen flow recovery rate. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a partial cross-sectional view of the present invention;

[0024] Figure 3 This is a schematic diagram of the electrostatic dust collection module, HEPA filter, and activated carbon layer of this utility model;

[0025] Figure 4 This is an enlarged view of point A in this utility model;

[0026] Figure 5 This is an enlarged view of section B of this utility model;

[0027] Figure 6 This is a schematic diagram of the primary filtration device of this utility model;

[0028] In the diagram: 1. Ventilation housing; 2. Air inlet duct; 3. Air outlet duct; 4. Mesh protective plate; 5. Fan; 6. Primary filter; 61. Synchronous belt assembly; 62. Motor; 63. C-shaped connecting plate; 64. Mounting plate; 65. Nylon brush; 66. Filter screen; 7. Electrostatic dust collection module; 8. HEPA filter element; 9. Activated carbon layer; 10. Assembly / disassembly assembly; 101. Mounting frame; 102. Limiting plate; 103. Mounting top plate; 11. Inclined mounting groove; 12. Slide groove; 13. Discharge chute; 131. Connecting frame; 132. T-shaped groove; 133. T-shaped plate; 134. Collection frame; 135. Guide plate; 14. Limiting groove; 15. Negative pressure suction port. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0030] This utility model provides a technical solution: such as Figure 1 As shown in this embodiment, an air purification mechanism for a ventilation device includes a ventilation housing 1. The air inlet end of the ventilation housing 1 is connected to an air inlet duct 2 via a flange, and the air outlet end of the ventilation housing 1 is connected to an exhaust duct 3 via a flange. A fan 5 is installed inside the exhaust duct 3, and a mesh protective plate 4 is provided on one side of both the air inlet duct 2 and the exhaust duct 3 via screws.

[0031] like Figure 2 and Figure 6 As shown, the primary filtration device 6 includes a filter screen 66 with an inclination angle of 40°-50° and a mesh diameter of 1-3mm. The filter screen 66 is designed with an inclination. Inclined mounting grooves 11 are provided on both sides of the air inlet side wall of the ventilation housing 1. A sliding groove 12 is provided above each inclined mounting groove 11. A synchronous belt assembly 61 is installed between the two inclined mounting grooves 11. A motor 62 is installed at the drive end of the synchronous belt assembly 61. Differential pressure sensors are provided on both the side wall near the air inlet end and the side wall near the air outlet end of the ventilation housing 1. Self-cleaning is driven by a control unit. A U-shaped connecting plate 63 is provided on the upper surface of the synchronous belt assembly 61 via screws. The outer wall of the U-shaped connecting plate 63 is connected to the inner wall of the sliding groove 12. The walls are slidably connected, and an installation plate 64 is fixedly connected between the two C-shaped connecting plates 63. A nylon brush 65 is provided on the side of the installation plate 64 facing the filter screen 66. The nylon brush 65 is in interference contact with the filter screen 66. A negative pressure suction port 15 is provided on the bottom side of the middle part of the ventilation housing 1 and below the filter screen 66. The negative pressure suction port 15 is connected to an external centrifugal fan. By setting a self-cleaning structure above the filter screen 66, the nylon brush 65 moves parallel to the surface of the filter screen 66 via a synchronous belt and works with the negative pressure suction port 15 to improve the cleaning effect of the filter screen. When the differential pressure sensors at both ends detect that the filter screen resistance reaches a preset value, cleaning is triggered to achieve self-cleaning of the filter screen, shorten the cleaning time, and improve the filter screen flow recovery rate.

[0032] like Figure 3 and Figure 5 As shown, a primary filter 6 is installed at the air inlet of the ventilation housing 1, and a HEPA filter 8 and an activated carbon layer 9 are installed at the air outlet of the ventilation housing 1. The HEPA filter 8 is made of PP material, and the activated carbon layer 9 is filled with a mixture of granular activated carbon and zeolite, with honeycomb-shaped flow channels. An electrostatic dust collection module 7 is installed between the primary filter 6 and the HEPA filter 8. The electrostatic dust collection module 7 includes a tungsten wire electrode and an aluminum dust collection plate, which is in the prior art. Disassembly and assembly components 10 are installed on the outside of the electrostatic dust collection module 7, the HEPA filter 8, and the activated carbon layer 9. The disassembly and assembly components 10 include a mounting frame 101, which is set on the electrostatic dust collection module. 7. The HEPA filter 8 and activated carbon layer 9 are externally mounted on the front and rear sides of the mounting frame 101. Limiting plates 102 are provided on both sides of the mounting frame 101. The top side of the mounting frame 101 is provided with a mounting top plate 103. The mounting top plate 103 is connected to the top of the ventilation housing 1 by screws. Limiting grooves 14 are opened on the inner walls of the left and right sides of the ventilation housing 1 near the exhaust end. The inner wall of the limiting groove 14 is engaged with the outer wall of the limiting plate 102. The filter screen 66, electrostatic dust collection module 7, HEPA filter 8 and activated carbon layer 9 are arranged in sequence inside the ventilation housing 1. The layered spatial arrangement improves the efficiency of air purification. The disassembly and assembly components 10 can be disassembled, cleaned or replaced regularly.

[0033] like Figure 4 As shown, a discharge trough 13 is provided on the bottom side of the ventilation housing 1 near the air inlet. A connecting frame 131 is fixedly connected to the inside of the discharge trough 13. T-shaped grooves 132 are provided at both ends of the bottom side of the connecting frame 131. T-shaped plates 133 are inserted into the inside of the T-shaped grooves 132. A collection frame 134 is fixedly connected to the bottom of the T-shaped plate 133. A guide plate 135 is fixedly connected to the side wall of the connecting frame 131 near the filter screen 66. The collection frame 134 is provided at the bottom of the inclined end of the filter screen 66 to collect the filtered particulate impurities. The collection frame 134 is connected to the T-shaped groove 132 through the T-shaped plate 133, which facilitates disassembly and cleaning.

[0034] This utility model provides an air purification mechanism for a ventilation device. The specific working principle is as follows: the fan 5 causes gas to be discharged from the air inlet duct 2 to the air outlet duct 3. The gas first passes through the filter screen 66 to intercept particulate impurities. The electrostatic dust collection module 7 adsorbs smaller particles, the HEPA filter element 8 filters the remaining particulate matter, and the activated carbon layer 9 adsorbs gases such as formaldehyde. When the differential pressure sensor at both ends detects that the resistance exceeds the standard, the motor 62 is started to drive the synchronous belt assembly 61, which in turn causes the nylon brush 65 to reciprocate. At the same time, the negative pressure suction port 15 improves the cleaning effect of the filter screen. The electrostatic dust collection module 7, HEPA filter element 8 and activated carbon layer 9 can be pulled out for cleaning every once in a while. The screws around the mounting plate 103 are removed, and the upper plate is pulled up to slide the limiting plate 102 in the limiting groove 14, so that it can be taken out for cleaning or replacement.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An air purification mechanism for a ventilation device, comprising a ventilation housing (1), characterized in that: The air inlet end of the ventilation housing (1) is connected to the air inlet duct (2) via a flange, and the air outlet end of the ventilation housing (1) is connected to the air outlet duct (3) via a flange. A fan (5) is installed inside the air outlet duct (3). A mesh protective plate (4) is provided on one side of both the air inlet duct (2) and the air outlet duct (3) via screws. The ventilation housing (1) is equipped with a primary filter device (6) at the air inlet end, and a HEPA filter element (8) and an activated carbon layer (9) are installed at the air outlet end of the ventilation housing (1). An electrostatic dust collection module (7) is installed between the primary filter device (6) and the HEPA filter element (8). The electrostatic dust collection module (7) and the outer sides of the HEPA filter element (8) and the activated carbon layer (9) are all equipped with disassembly and assembly components (10). The primary filtration device (6) includes a filter screen (66), which is designed to be inclined. The air inlet side walls of the ventilation housing (1) are provided with inclined mounting grooves (11). A sliding groove (12) is provided above each inclined mounting groove (11). A synchronous belt assembly (61) is installed between the two inclined mounting grooves (11). A motor (62) is installed at the drive end of the synchronous belt assembly (61). The upper surface of the synchronous belt assembly (61) is provided with a C-shaped connecting plate (63) by screws. The upper outer wall of the C-shaped connecting plate (63) is slidably connected to the inner wall of the sliding groove (12). An installation plate (64) is fixedly connected between the two C-shaped connecting plates (63). A nylon brush (65) is provided on the side of the installation plate (64) facing the filter screen (66). The nylon brush (65) is in interference contact with the filter screen (66).

2. The air purification mechanism of a ventilation device according to claim 1, characterized in that: The disassembly and assembly assembly (10) includes a mounting frame (101), which is located outside the electrostatic dust collection module (7), HEPA filter (8), and activated carbon layer (9). Limiting plates (102) are provided on both the front and rear sides of the mounting frame (101), and a mounting top plate (103) is provided on the top side of the mounting frame (101). The mounting top plate (103) is connected to the top of the ventilation housing (1) by screws.

3. The air purification mechanism of a ventilation device according to claim 1, characterized in that: The ventilation housing (1) has limit grooves (14) on the inner walls of both sides near the exhaust end. The inner wall of the limit groove (14) is engaged with the outer wall of the limit plate (102).

4. The air purification mechanism of a ventilation device according to claim 1, characterized in that: The ventilation housing (1) has a feeding trough (13) on the bottom side near the air inlet. A connecting frame (131) is fixedly connected to the inside of the feeding trough (13). T-shaped grooves (132) are provided at both ends of the bottom side of the connecting frame (131). T-shaped plates (133) are inserted into the inside of the T-shaped grooves (132). A collection frame (134) is fixedly connected to the bottom of the T-shaped plate (133). A guide plate (135) is fixedly connected to the side wall of the connecting frame (131) near the filter screen (66).

5. The air purification mechanism of a ventilation device according to claim 1, characterized in that: Differential pressure sensors are provided on both the side wall near the air inlet end and the side wall near the air outlet end of the ventilation housing (1), and self-cleaning is driven by the control unit.

6. The air purification mechanism of a ventilation device according to claim 1, characterized in that: The filter screen (66) has an inclination angle of 40°-50° and a mesh diameter of 1-3mm. The HEPA filter element (8) has an angle of 70°-80° between the pleat direction and the airflow direction.

7. The air purification mechanism of a ventilation device according to claim 1, characterized in that: The ventilation housing (1) has a negative pressure dust suction port (15) located on the bottom side of the middle part and below the filter screen (66), and the negative pressure dust suction port (15) is connected to an external centrifugal fan.

Images