Fresh air purification unit with multi-layer filtering structure

Abstract

This utility model discloses a fresh air purification unit with a multi-layer filtration structure, specifically relating to the technical field of fresh air purification units. It includes a housing assembly, an air inlet duct on the top right side of the housing assembly, a return air duct on the top left side of the housing assembly, a fresh air duct on the left end of the housing assembly, an anti-backflow damper assembly on the left side of the inner cavity of the housing assembly, a condenser assembly on the right side of the inner cavity of the housing assembly, two pre-filters on the left side of the inner cavity of the housing assembly, a medium-efficiency filter assembly in the middle of the inner cavity of the housing assembly, and a fan assembly on the left end of the inner cavity of the housing assembly. This utility model's fresh air purification unit with a multi-layer filtration structure achieves graded purification of air through this multi-layer filtration structure; the pre-filters remove impurities from the incoming air, and the medium-efficiency filters further filter out fine pollutants.

Description

Technical Field

[0001] This utility model relates to the technical field of fresh air purification units, and in particular to a fresh air purification unit with a multi-layer filtration structure. Background Technology

[0002] With the acceleration of industrialization and the improvement of urbanization, the concentration of particulate matter and pollutants in the air continues to rise, and indoor and outdoor air quality problems are becoming increasingly prominent. Outdoor air pollution seeps into the room through gaps in doors and windows, causing indoor air quality to be directly affected by the external environment. It accumulates in enclosed spaces, forming a cumulative effect of indoor air pollution. Traditional ventilation and purification equipment cannot effectively remove fine dust and other pollutants when dealing with complex air purification needs, resulting in low purification efficiency. The demand for fresh air purification in different scenarios is showing a trend of professionalization and refinement. In the commercial field, it is necessary to balance the ventilation volume of large spaces with high-efficiency purification capabilities, while meeting the needs of switching between internal and external circulation at different times.

[0003] Chinese patent document CN206803370U discloses a household fresh air purification unit, which includes: a shell and a coarse filter, a microporous electrostatic filter, a high-efficiency filter and a booster fan disposed inside the shell; an air inlet and an air outlet are respectively opened at both ends of the shell, and the coarse filter, the microporous electrostatic filter, the high-efficiency filter and the booster fan are arranged sequentially between the air inlet and the air outlet; the booster fan is used to pump the air between the high-efficiency filter and the air outlet to the air outlet; the household fresh air purification unit adopts multi-layer filtration and booster fan to effectively remove dust while also timely replenishing fresh air to the room.

[0004] The aforementioned patent documents still have the following defects in practice:

[0005] In actual use, the household fresh air purification unit does not have an internal circulation and external circulation switching function, and can only achieve unidirectional outdoor fresh air introduction and filtration; its filter components are not designed with a flexible disassembly and assembly structure for different filtration needs, and the operation is cumbersome when a filter needs to be cleaned or replaced. Utility Model Content

[0006] The main objective of this invention is to provide a fresh air purification unit with a multi-layer filtration structure, which can effectively solve the problems mentioned above.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A fresh air purification unit with a multi-layer filtration structure includes a housing assembly. An air inlet duct is located on the top right side of the housing assembly, a return air duct is located on the top left side of the housing assembly, and a fresh air duct is located at the left end of the housing assembly. An anti-backflow damper assembly is located on the left side of the inner cavity of the housing assembly for regulating and controlling internal and external circulation. A condenser assembly is located on the right side of the inner cavity of the housing assembly. Two primary filters are located on the left side of the inner cavity of the housing assembly for preliminary filtration of the incoming air. A medium-efficiency filter assembly is located in the middle of the inner cavity of the housing assembly for further filtration of the incoming air. The two primary filters are located to the left of the medium-efficiency filter assembly. A fan assembly is located at the left end of the inner cavity of the housing assembly.

[0009] Preferably, the housing assembly includes a housing body, and the front left and right sides of the housing body are respectively provided with inspection windows of different sizes. Limiting blocks are provided on both the left and right sides of the two inspection windows, and a rotating handle is provided on the top of the limiting blocks.

[0010] Preferably, the condensation assembly includes a positioning frame, the inner cavity of which is provided with an S-shaped condenser tube, and the left and right ends of the positioning frame are provided with limit plates.

[0011] Preferably, the anti-airflow door assembly includes a fan-shaped plate, a sealing ring 1 is provided on the upper surface of the fan-shaped plate, a drive shaft is provided in the inner cavity of the fan-shaped plate, a sealing ring 2 is provided on the lower surface of the fan-shaped plate, connecting columns are provided on both the left and right sides of the fan-shaped plate, and semi-circular guide rails are provided on both the left and right sides of the fan-shaped plate for limiting and guiding the connecting columns. A motor is provided at the rear end of the fan-shaped plate, a gear 2 is provided at the output end of the motor, a gear 1 is provided at the left end of the gear 2, and the gear is fitted onto the end of the drive shaft near the motor.

[0012] Preferably, the two semicircular guide rails are fixedly connected to the front and rear ends of the inner cavity of the box body, respectively.

[0013] Preferably, the primary filter assembly includes a primary filter frame, the inner cavity of the primary filter frame is provided with a filter layer one, the filter layer one is provided with filter screens on both the left and right sides, the lower part of the left and right ends of the primary filter frame is provided with a limiting plate two, the lower part of the left and right ends of the primary filter frame near the edge is provided with positioning buckles, and the middle part of the end of the primary filter frame near the secondary filter assembly is provided with push-pull handles on both the left and right sides.

[0014] Preferably, the medium-efficiency filter assembly includes a medium-efficiency filter frame, the inner cavity of which is provided with a second filter layer, and fixed meshes are provided on both the left and right sides of the second filter layer.

[0015] Preferably, the fan assembly includes a fan body, a base is provided at the bottom of the fan body, and an air baffle is provided at the output end of the fan body.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. In the implementation of this utility model, the multi-layer filtration structure achieves graded purification of air; the primary filter first filters out larger particulate impurities from the incoming gas, and then the secondary filter further filters out fine particulate pollutants, which significantly improves the air purification effect and provides users with cleaner air.

[0018] 2. In the implementation of this utility model, the anti-flow damper assembly adopts a fan-shaped plate with a sealing ring and a gear transmission structure. Under the drive of the motor, the internal and external circulation can be adjusted, and the sealing performance is good, effectively preventing cross-flow of different circulating airflows.

[0019] 3. In the implementation of this utility model, the inspection window of the housing component facilitates the inspection and maintenance of internal components; the primary filter component is designed with push-pull handles and positioning buckles, making it easy to disassemble and assemble, which is conducive to daily cleaning and replacement; the S-shaped condenser tube of the condenser component increases the heat exchange area and improves the condensation efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the overall structure of this utility model from another perspective;

[0022] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0023] Figure 4 This is a cross-sectional structural schematic diagram of the present invention from another perspective;

[0024] Figure 5 This is a schematic diagram of part of the internal structure of this utility model.

[0025] In the diagram: 1. Cabinet assembly; 11. Cabinet body; 12. Inspection window; 13. Rotating handle; 14. Limiting block; 2. Anti-backflow damper assembly; 21. Sector plate; 22. Sealing ring one; 23. Semicircular guide rail; 24. Gear one; 25. Drive shaft; 26. Gear two; 27. Motor; 28. Sealing ring two; 29. ​​Connecting column; 3. Return air duct; 4. Inlet air duct; 5. Condensation assembly; 51. Positioning frame 52. Limiting plate one; 53. Condensate pipe; 6. Fresh air duct; 7. Primary filter assembly; 71. Filter layer one; 72. Push-pull handle; 73. Limiting plate two; 74. Positioning buckle; 75. Filter screen; 76. Primary filter frame; 8. Medium-efficiency filter assembly; 81. Medium-efficiency filter frame; 82. Fixing mesh; 83. Filter layer two; 9. Fan assembly; 91. Fan body; 92. Air baffle; 93. Base. Detailed Implementation

[0026] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0027] Example 1, as Figure 1 and Figure 3 As shown, a fresh air purification unit with a multi-layer filtration structure includes a housing assembly 1. An air inlet pipe 4 is provided on the right side of the top of the housing assembly 1, a return air pipe 3 is provided on the left side of the top of the housing assembly 1, a fresh air pipe 6 is provided on the left side of the housing assembly 1, an anti-backflow damper assembly 2 is provided on the left side of the inner cavity of the housing assembly 1 for adjusting and controlling the internal and external circulation, a condenser assembly 5 is provided on the right side of the inner cavity of the housing assembly 1, two primary filter assemblies 7 are provided on the left side of the inner cavity of the housing assembly 1 for preliminary filtration of the incoming air, a medium-efficiency filter assembly 8 is provided in the middle of the inner cavity of the housing assembly 1 for further filtration of the incoming air, the two primary filter assemblies 7 are located on the left side of the medium-efficiency filter assembly 8, and a fan assembly 9 is provided on the left side of the inner cavity of the housing assembly 1.

[0028] In this embodiment, an external cooling source device is required, model LSQWRF65M / NaE3; a humidifier device is required and connected to the left end of the inner cavity of the main body 11, model YDC-306EB; a control panel is also required to be installed on the right side of the outer shell of the main body 11. The control panel is used to control the operation of the anti-backflow damper assembly 2, the condenser assembly 5, the fan assembly 9, the motor 27, and the external cooling source device, so that they work together to achieve the purification level of the clean room to meet the requirements of level 10. The existing technology model Smart1000 IE can be used.

[0029] Preparation:

[0030] First, determine the installation position of the cabinet assembly 1 to ensure that the air inlet duct 4, return air duct 3, and fresh air duct 6 can easily transport air; second, install and connect the external cooling source device to the condenser assembly 5; at the same time, install the humidifier device near the left end of the inner cavity of the cabinet body 11 so that it can smoothly enter the left side of the inner cavity of the cabinet assembly 1; finally, connect the power supply.

[0031] In this embodiment, during implementation, the power is turned on, and the anti-fouling damper assembly 2 is adjusted and controlled by the control system to switch between internal and external circulation. When it is external circulation, outdoor fresh air enters the inner cavity of the housing assembly 1 through the fresh air duct 6. When it is internal circulation, indoor air can enter through the return air duct 3. Subsequently, the air entering the inner cavity of the housing assembly 1 first passes through two primary filter assemblies 7, which perform preliminary filtration of larger particulate impurities and dust in the air, filtering out large particulate pollutants. Then, the air passes through the medium-efficiency filter assembly 8, which further filters out fine particulate dust and other impurities in the air, thus purifying the air a second time.

[0032] When the air flows to the condenser assembly 5, the external cooling source device delivers refrigerant to the condenser assembly 5 to absorb the heat in the air, thereby achieving condensation and cooling of the air; finally, the treated air is accelerated by the fan assembly 9 and transported to the required area through the fresh air duct 6; during this process, a humidification device can be introduced into the left side of the inner cavity of the cabinet assembly 1 to humidify the air to meet the humidity requirements.

[0033] Specifically, in order to facilitate the inspection and maintenance of the interior of the enclosure, such as Figure 2 As shown, the box assembly 1 includes a box body 11. The front left and right sides of the box body 11 are respectively provided with inspection windows 12 of different sizes. Limiting blocks 14 are provided on both the left and right sides of the two inspection windows 12. Rotating handles 13 are provided at the top of several limiting blocks 14.

[0034] In this embodiment, when it is necessary to inspect the various components inside the main body 11 of the box, the operator can hold the rotating handle 13 and rotate it to drive the limit block 14 to rotate, thereby opening the two inspection windows 12.

[0035] Specifically, in order to achieve the purpose of preliminary filtration of the incoming gas, such as Figure 4 As shown, the primary filter assembly 7 includes a primary filter frame 76. The primary filter frame 76 has a filter layer 71 inside. Filter screens 75 are provided on both the left and right sides of the filter layer 71. Limiting plates 73 are provided at the lower part of the left and right ends of the primary filter frame 76. Positioning buckles 74 are provided on both sides of the lower part of the left and right ends of the primary filter frame 76 near the edge. Push-pull handles 72 are provided on both the left and right sides of the middle part of the end of the primary filter frame 76 near the secondary filter assembly 8.

[0036] In this embodiment, when gas enters the inner cavity of the housing assembly 1, it first passes through the primary filter assembly 7. The first filter layer 71 can filter larger particles of impurities and dust in the gas. At the same time, the filter screens 75 on both sides position the first filter layer 71 so that it is not affected by the flow of air, thus achieving the initial filtration of the first filter layer 71. When it is necessary to clean or replace the primary filter assembly 7, the operator holds the push-pull handle 72 and pulls out the primary filter frame 76 under the limiting guidance of the limiting plates 73 at both ends. At the same time, the positioning buckle 74 can fix the primary filter frame 76 during installation, so that the primary filter frame 76 is firmly installed. When disassembling the primary filter frame 76, pressing the positioning buckle 74 can release the fixation, thus completing the disassembly and assembly of the primary filter assembly 7.

[0037] Specifically, in order to achieve further air filtration, such as Figure 4 As shown, the medium-efficiency filter assembly 8 includes a medium-efficiency filter frame 81, and a filter layer 83 is provided in the inner cavity of the medium-efficiency filter frame 81. Fixing meshes 82 are provided on both the left and right sides of the filter layer 83.

[0038] In this embodiment, after the air is initially filtered by the primary filter assembly 7, it enters the secondary filter assembly 8. The secondary filter layer 83 in the secondary filter frame 81 can filter out finer particulate impurities such as dust in the gas. At the same time, the fixing nets 82 on the left and right sides support and fix the secondary filter layer 83 to prevent the secondary filter layer 83 from deforming in the flowing air.

[0039] Specifically, in order to achieve the goal of efficient condensation treatment, such as Figure 3 As shown, the condenser assembly 5 includes a positioning frame 51, an S-shaped condenser tube 53 is provided in the inner cavity of the positioning frame 51, and limit plates 52 are provided at both the left and right ends of the positioning frame 51.

[0040] In this embodiment, during implementation, an external cooling source device supplies low-temperature refrigerant to the condenser tube 53. When the gas that needs to be condensed flows through the condenser tube 53 in the inner cavity of the positioning frame 51, the S-shaped condenser tube 53 increases the contact area with the air, absorbs more heat, and thus lowers the temperature. The limiting plates 52 at the left and right ends fix and limit the condenser tube 53.

[0041] Specifically, in order to achieve the purpose of providing power for airflow, such as Figure 4 As shown, the fan assembly 9 includes a fan body 91, a base 93 is provided at the bottom of the fan body 91, and an air baffle 92 is provided at the output end of the fan body 91.

[0042] In this embodiment, when the fan body 91 is working, it generates power to accelerate the flow of air in the inner cavity of the housing assembly 1; the base 93 provides stable support for the fan body 91, and the baffle plate 92 can guide and separate the airflow output by the fan body 91 to avoid airflow turbulence.

[0043] Example 2: Based on Example 1, this example allows for adjustment and control of the inner and outer circulation.

[0044] Specifically, in order to achieve the above objectives, such as Figure 3 and Figure 5 As shown, in this embodiment, the anti-airflow door assembly 2 includes a sector plate 21, a sealing ring 22 is provided on the upper surface of the sector plate 21, a drive shaft 25 is provided in the inner cavity of the sector plate 21, a sealing ring 28 is provided on the lower surface of the sector plate 21, connecting posts 29 are provided on both the left and right sides of the sector plate 21, and semi-circular guide rails 23 are provided on both the left and right sides of the sector plate 21 for limiting and guiding the connecting posts 29. A motor 27 is provided at the rear end of the sector plate 21, a gear 26 is provided at the output end of the motor 27, a gear 24 is provided at the left end of the gear 26, and the gear 24 is sleeved on the end of the drive shaft 25 near the motor 27.

[0045] Furthermore, the two semi-circular guide rails 23 are fixedly connected to the front and rear ends of the inner cavity of the main body 11 of the box, respectively;

[0046] In this embodiment, when it is necessary to adjust the inner and outer circulation, the power is turned on and the motor 27 is started. The motor 27 drives the gear 26 to rotate. Since the gear 26 meshes with the gear 24, it drives the gear 24 and the transmission shaft 25 to rotate. When the transmission shaft 25 rotates, the sector plate 21 rotates accordingly. The connecting columns 29 on the left and right sides of the sector plate 21 slide up and down in the semi-circular guide rail 23 on the same side to ensure that the sector plate 21 can rotate stably.

[0047] During the rotation of the sector plate 21, the sealing ring 22 on its upper surface and the sealing ring 28 on its lower surface can fit tightly with the corresponding positions of the return air duct 3 and the fresh air duct 6, respectively, to achieve a good sealing effect, thereby adjusting the airflow channels of the internal circulation and the external circulation and preventing crossflow between different circulation airflows.

[0048] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A fresh air purification unit with a multi-layer filtering structure, comprising a box assembly (1), characterized in that: An air inlet pipe (4) is provided on the right side of the top of the box assembly (1), a return air pipe (3) is provided on the left side of the top of the box assembly (1), a fresh air pipe (6) is provided on the left side of the box assembly (1), an anti-passing air damper assembly (2) is provided on the left side of the inner cavity of the box assembly (1) for adjusting and controlling the internal and external circulation, a condenser assembly (5) is provided on the right side of the inner cavity of the box assembly (1), two primary filter assemblies (7) are provided on the left side of the inner cavity of the box assembly (1) for preliminary filtration of the incoming gas, a medium-efficiency filter assembly (8) is provided in the middle of the inner cavity of the box assembly (1) for further filtration of the incoming gas, the two primary filter assemblies (7) are located on the left side of the medium-efficiency filter assembly (8), and a fan assembly (9) is provided on the left side of the inner cavity of the box assembly (1).

2. The fresh air purification unit with a multi-layer filtering structure according to claim 1, characterized in that: The box assembly (1) includes a box body (11). The front left and right sides of the box body (11) are respectively provided with inspection windows (12) of different sizes. Limiting blocks (14) are provided on the left and right sides of the two inspection windows (12). A rotating handle (13) is provided on the top of several limiting blocks (14).

3. The fresh air purification unit with a multi-layer filtering structure according to claim 1, characterized in that: The condensation assembly (5) includes a positioning frame (51), and an S-shaped condenser tube (53) is provided in the inner cavity of the positioning frame (51). Limiting plates (52) are provided at both the left and right ends of the positioning frame (51).

4. The fresh air purification unit with a multi-layer filtering structure according to claim 1, characterized in that: The anti-airflow door assembly (2) includes a fan-shaped plate (21), a sealing ring (22) is provided on the upper surface of the fan-shaped plate (21), a transmission shaft (25) is provided in the inner cavity of the fan-shaped plate (21), a sealing ring (28) is provided on the lower surface of the fan-shaped plate (21), a connecting column (29) is provided on both the left and right sides of the fan-shaped plate (21), and a semi-circular guide rail (23) is provided on both the left and right sides of the fan-shaped plate (21) for limiting and guiding the connecting column (29). A motor (27) is provided at the rear end of the fan-shaped plate (21), a gear (26) is provided at the output end of the motor (27), a gear (24) is provided at the left end of the gear (26), and the gear (24) is sleeved on the end of the transmission shaft (25) near the motor (27).

5. The fresh air purification unit with a multi-layer filtering structure according to claim 4, characterized in that: The two semicircular guide rails (23) are fixedly connected to the front and rear ends of the inner cavity of the main body of the box (11), respectively.

6. A fresh air purification unit with a multi-layer filtration structure according to claim 1, characterized in that: The primary filter assembly (7) includes a primary filter frame (76), the inner cavity of which is provided with a filter layer (71), and filter screens (75) are provided on both the left and right sides of the filter layer (71). Limiting plates (73) are provided at the lower part of the left and right ends of the primary filter frame (76). Positioning buckles (74) are provided on both sides of the lower part of the left and right ends of the primary filter frame (76) near the edge. Push-pull handles (72) are provided on both the left and right sides of the middle part of the end of the primary filter frame (76) near the secondary filter assembly (8).

7. A fresh air purification unit with a multi-layer filtration structure according to claim 1, characterized in that: The medium-efficiency filter assembly (8) includes a medium-efficiency filter frame (81), and a second filter layer (83) is provided in the inner cavity of the medium-efficiency filter frame (81). Fixing meshes (82) are provided on both the left and right sides of the second filter layer (83).

8. A fresh air purification unit with a multi-layer filtration structure according to claim 1, characterized in that: The fan assembly (9) includes a fan body (91), a base (93) is provided at the bottom of the fan body (91), and a baffle plate (92) is provided at the output end of the fan body (91).

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