A new type of air fan box

Abstract

This utility model relates to the field of fresh air handling unit technology, and discloses a fresh air handling unit box, including a housing. A protective mechanism is fixedly connected to the front of the housing, a blower is fixedly connected to the inner wall of the housing, a replacement mechanism is fixedly connected to the inner wall of the housing, a pre-filter is slidably connected to the inner wall of the housing, and a high-efficiency filter is slidably fixedly connected to the housing. The protective mechanism includes a connecting plate, the rear of which is fixedly connected to the front of the housing. Multiple guide posts are fixedly connected to the front of the connecting plate, and guide post springs are sleeved on the exterior of each guide post. Protective nets are slidably connected to adjacent sides of each guide post. In this utility model, the protective mechanism effectively addresses the safety hazard of children accidentally inserting their fingers or toys into the air handling unit, improves the ease of replacing a damaged blower in the fresh air handling unit box, and enhances the safety of the fresh air handling unit box.

Description

Technical Field

[0001] This utility model relates to the field of fresh air handling unit technology, and in particular to a fresh air fan box. Background Technology

[0002] A fresh air fan unit is a centralized ventilation device that integrates modules such as pre-filter, medium-efficiency filter, high-efficiency filter, and heat exchange. It combines air purification and power delivery functions, primarily addressing the pain points of insufficient fresh air, pollutant accumulation, and poor temperature and humidity regulation in enclosed spaces. It transforms outdoor fresh air into clean air that meets health and comfort standards. Compared to traditional decentralized ventilation equipment, it avoids problems such as unstable airflow and complex installation, making it suitable for various scenarios including commercial buildings, hospitals, and electronics factories. Through its modular structure and intelligent variable frequency control system, combined with scenario-specific components, it gradually purifies fresh air and regulates temperature and humidity to meet the air quality requirements of different locations. Furthermore, its centralized duct design enables unified ventilation control across multiple spaces, reducing maintenance costs and providing high-quality air protection for indoor personnel health and stable production processes.

[0003] The core components of a fresh air handling unit include an inlet filtration module, a fan power module, a temperature and humidity control module, and an outlet air distribution module. The inlet filtration module has pre-filters and high-efficiency filters to intercept dust and impurities; the heat exchange module contains a total heat or sensible heat exchange core to recover energy from both fresh and old air; the fan power module is equipped with a variable frequency fan to control airflow; the temperature and humidity control module has a humidifier tank and a heat exchanger to regulate air temperature and humidity; and the outlet air distribution module contains a plenum chamber and air valves to stabilize air pressure and distribute airflow. During operation, outdoor fresh air first passes through the inlet filtration module to remove impurities, then enters the heat exchange module to exchange heat with indoor exhaust air for energy recovery. It is then delivered by the fan power module to the temperature and humidity control module, where it is adjusted to suitable parameters. Finally, it is distributed to various areas of the room through the outlet air distribution module, while stale indoor air is exhausted through the exhaust duct, completing the air circulation and renewal process.

[0004] In existing technologies, some fresh air fan enclosures lack anti-pinch protection covers in their structural design. When children play around the equipment, if the fan is running, a child could easily insert their fingers through the air vent grille into the fan, causing finger injuries. This safety hazard not only threatens the user's personal safety but also negatively impacts the safe use of the equipment. Therefore, this solution proposes a novel fresh air fan enclosure to address these issues. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a new type of air fan box, which aims to improve the safety of air outlets in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a fresh air fan box, wherein an upper toothed plate is slidably connected to the front side of the connecting plate, a sliding button is fixedly connected to the top of the upper toothed plate, and a support component is slidably connected to the outside of the sliding button; As a further description of the above technical solution: the replacement mechanism includes two slide rails, the bottom of both slide rails are fixedly connected to the inner wall of the housing, a slider is slidably connected to the top of the slide rails, a limit post is slidably connected to the adjacent side of both slide rails, a locking spring is sleeved on the outside of the limit post, a moving block is slidably connected to the inner wall of the limit post, a spring is fixedly connected to the bottom of the moving block, a button post is slidably connected to the inner wall of the slider, a torsion spring is sleeved on the outside of the button post, and a connecting plate is fixedly connected to the outside of the button post; As a further description of the above technical solution: the support assembly includes a protective shell, the rear side of which is fixedly connected to the front side of the connecting plate, and an outer shell is fixedly connected to the front side of the protective shell; As a further description of the above technical solution: the bottom of the upper toothed plate is meshed with the outside of the gear, and the top of the lower toothed plate is meshed with the outside of the gear; As a further description of the above technical solution: the far sides of the two locking springs are fixedly connected to the inner wall of the slider, and the near sides of the two locking springs are fixedly connected to the outside of the limiting post. As a further description of the above technical solution: the top of the torsion spring is fixedly connected to the bottom of the connecting plate, and the bottom of the torsion spring is fixedly connected to the inner wall of the slider; As a further description of the above technical solution: the bottoms of the two spring pillars are fixedly connected to the inner wall of the slider, and the top of the slider is fixedly connected to the bottom of the blower; As a further description of the above technical solution: the adjacent sides of the plurality of guide post springs are fixedly connected to the distant sides of the two protective nets, and the distant sides of the plurality of guide post springs are all fixedly connected to the inner wall of the protective shell.

[0007] This utility model has the following beneficial effects: 1. In this utility model, the sliding button is engaged in the slot on the protective shell. Sliding the sliding button causes the connected upper toothed plate to press the guide post spring to the left and open it to the left. When the upper toothed plate moves, the gear rotates at the same time. When the gear rotates, it also drives the lower toothed plate to move. The lower toothed plate, connected to the protective plate, moves to the right, exposing the air outlet. When the sliding button leaves the slot, the two protective nets merge, thereby achieving the protective function. Compared with the prior art, it has the effect of protecting personal safety. 2. In this utility model, by pressing the button post, the button post is pressed down, and the connecting post connected to the button post has moving blocks at both ends. The moving blocks are moved down, and the limiting post is slidably connected to the outside of the moving block. The limiting post slides in the groove of the moving block, causing the limiting post to move inward and leave the slide rail, thereby making it easy to remove the slider and the blower. Compared with the prior art, this has the effect of quickly replacing the blower. Attached Figure Description

[0008] Figure 1 This is a three-dimensional schematic diagram of a new type of air blower casing proposed in this utility model; Figure 2 This is a schematic diagram of the protective netting structure of a fresh air fan casing proposed in this utility model; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 for Figure 2 Enlarged view of point B in the middle.

[0009] Legend: 1. Housing; 2. Protective mechanism; 21. Connecting plate; 22. Guide post; 23. Guide post spring; 24. Protective net; 25. Lower toothed plate; 26. Gear; 27. Upper toothed plate; 28. Sliding button; 29. Supporting components; 291. Sheath; 292. Outer shell; 3. Blower; 4. Replacement mechanism; 41. Slide rail; 42. Slider; 43. Limit post; 44. Locking spring; 45. Moving block; 46. Spring post; 47. Button post; 48. Torsion spring; 49. Connecting plate; 5. Pre-filter; 6. High-efficiency filter. Detailed Implementation

[0010] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0011] Example: A fresh air fan box, referring to Figures 1 to 3The system includes a housing 1, a protective mechanism 2 fixedly connected to the front of the housing 1, an air supply fan 3 fixedly connected to the inner wall of the housing 1, a replacement mechanism 4 fixedly connected to the inner wall of the housing 1 for easy replacement, a primary filter 5 slidably connected to the inner wall of the housing 1 for filtering larger impurities in the air, and a high-efficiency filter 6 slidably connected to the housing 1 for fine filtration; the high-efficiency filter 6 further filters the gas passing through the primary filter 5 to ensure the quality of the air outlet. The protective mechanism 2 includes a metal connecting plate 21. The rear of the connecting plate 21 is fixedly connected to the front of the housing 1. Multiple guide posts 22 are fixedly connected to the front of the connecting plate 21. Each guide post 22 is fitted with a guide post spring 23 for reset. A mesh protective net 24 is slidably connected to the adjacent side of the multiple guide posts 22. A strip-shaped lower toothed plate 25 is fixedly connected to the top of the protective net 24. A circular gear 26 is rotatably connected to the front of the connecting plate 21. A long toothed plate is slidably connected to the front side of the connecting plate 21. A sliding button 28 for easy fixing is fixedly connected to the top of the upper toothed plate 27. A support component 29 is slidably connected to the outside of the sliding button 28. The support component 29 mainly protects the movement trajectory of the internal protective net 24 and prevents the complex protective net 24 from falling off. Specifically, during equipment operation, the blower 3 starts to generate airflow, the protection mechanism 2 opens, and the protective net 24 unfolds along the guide post 22 under the elastic force of the guide post spring 23, causing the two protective nets 24 to merge and prevent animals or children from stuffing toys inside. Larger impurities are filtered through the primary filter 5, and then finely filtered through the high-efficiency filter 6. Clean air is then delivered by the blower 3. When it is necessary to inspect or clean the blades of the blower 3, the left sliding button 28 engages with the slot on the protective shell 291, causing the upper toothed plate 27 to slide upwards along the connecting plate 21. Through engagement with the circular gear 26, it drives the lower toothed plate 25 and the protective net 24 to slide open along the guide post 22, compressing the guide post spring 23. The replacement mechanism 4 allows for quick removal and replacement of the blower 3.

[0012] Reference Figure 2 and Figure 4The replacement mechanism 4 includes two slide rails 41, which are symmetrically and parallelly distributed. The bottom of each slide rail 41 is fixedly connected to the inner wall of the housing 1, providing a sliding track for the slider 42. The top of each slide rail 41 is slidably connected to the slider 42, which can move horizontally along the slide rail 41. Limiting posts 43 are slidably connected to adjacent sides of each slide rail 41, which fix the slider 42 to one side of the slide rail 41. A retaining spring 44 is sleeved on the outside of the limiting post 43, providing... The system includes a reset elastic support; a movable block 45 is slidably connected to the inner wall of the limiting post 43, and the movable block 45 can slide along the post wall; a spring post 46 is fixedly connected to the bottom of the movable block 45, and the spring post 46 assists the movable block 45 in resetting; a button post 47 is slidably connected to the inner wall of the slider 42, and the button post 47 can be pressed and slid up and down; a torsion spring 48 is sleeved on the outside of the button post 47, and the spring buffers the pressing force; a connecting plate 49 is fixedly connected to the outside of the button post 47, and the connecting plate 49 transmits the power of the button post 47.

[0013] Specifically, when it is necessary to drive the slider 42 to move along the slide rail 41, first press down the button post 47. The button post 47 compresses the external torsion spring 48 and drives the connecting plate 49 to move down synchronously. The connecting plate 49 and the moving block 45 move down, and the moving block 45 causes the limiting post 43 to tighten inward. At the same time, the limiting post 43 moves away from the slide rail 41 under the force of the moving block 45, disengaging from the locking state of the slide rail 41. At this time, the slider 42 can slide horizontally along the slide rail 41. When the slider 42 moves to the target position, release the button post 47. The torsion spring 48 resets and drives the button post 47 and the connecting plate 49 to move up. The limiting post 43 resets under the elastic force of the locking spring 44 and re-locks into the corresponding slot of the slider 42, fixing the slider 42 in the current position, completing one movement and positioning operation of the slider 42.

[0014] Reference Figure 1 and Figure 3 The bottom of the upper toothed plate 27 is precisely meshed with the outside of the gear 26, and the top of the lower toothed plate 25 is stably meshed with the outside of the gear 26. The two opposite sides of the two locking springs 44 are firmly fixed to the inner wall of the slider 42, and the two near sides of the two locking springs 44 are tightly fixed to the outside of the limiting post 43. The top of the torsion spring 48 is fixed to the bottom of the connecting plate 49, and the bottom of the torsion spring 48 is firmly fixed to the inner wall of the slider 42. The bottom of the two spring posts 46 is stably fixed to the inner wall of the slider 42, and the top of the slider 42 is tightly fixed to the bottom of the blower 3. The near sides of the multiple guide springs 23 are elastically fixed to the opposite sides of the two protective nets 24, and the opposite sides of the multiple guide springs 23 are firmly fixed to the inner wall of the protective shell 291. Specifically, through precise engagement with the upper toothed plate 27 and the lower toothed plate 25, related components are driven to move in tandem. When the protective net 24 is subjected to external force, the guide post spring 23 is compressed, causing elastic deformation, buffering the impact force, and then returning to its original position. When the blower 3 is replaced, the slider 42 slides along the slide rail 41, and the locking spring 44 pushes the limiting post 43 to lock the slider 42 for positioning. Pressing the button post 47 causes the torsion spring 48 to contract, driving the connecting plate 49 to move downward, pushing the moving block 45 to compress the spring post 46, causing the limiting post 43 to retract and unlock, allowing the slider 42 to move freely. After being released, all springs return to their original positions to complete the fixation.

[0015] The implementation principle of this application embodiment is as follows: When the fan box is running, the sliding button 28 leaves the slot on the protective shell 291, causing the guide post springs 23 on both sides of the protective net 24 to close the two protective nets 24 inward along the guide post 22. When it is necessary to check the internal blower 3, the sliding button 28 is pushed so that the sliding button 28 is locked in the slot on the protective shell 291. When the sliding button 28 is pushed, the upper toothed plate 27 is connected to the protective net 24 and opens to both sides, squeezing the guide post springs 23. The protective net 24 moves along the guide post 22. When the upper toothed plate 27 moves, the gear 26 is rotated, and the gear 26 rotates at the same time. The gear 26 rotates and drives the lower gear 26 to rotate, moving the right protective plate to the right and opening the entire protective net 24.

[0016] When the internal blower 3 malfunctions and needs to be replaced, pressing the button causes the column 47 to move downwards. Simultaneously, the connecting plate 49 presses the spring column 46 downwards, and the limiting column 43 moves inwards along the inclined groove on the moving plate, causing the limiting column 43 to leave the slide rail 41. This allows the slider 42 to slide easily on the slide rail 41. When the button is released, the spring column 46 resets, causing the moving block 45 to move upwards. This opens the limiting column 43 to both ends and locks it into the slot on the slide rail 41, fixing the entire slider 42 and blower 3 in place and preventing internal structure from shaking. This achieves the safety protection function and quick replacement of the entire device.

[0017] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fresh air fan casing, comprising a housing (1), characterized in that: A protective mechanism (2) is fixedly connected to the front of the housing (1), a blower (3) is fixedly connected to the inner wall of the housing (1), a replacement mechanism (4) is fixedly connected to the inner wall of the housing (1), a primary filter (5) is slidably connected to the inner wall of the housing (1), and a high-efficiency filter (6) is slidably fixedly connected to the inner wall of the housing (1). The protective mechanism (2) includes a connecting plate (21), the rear of which is fixedly connected to the front of the housing (1). A plurality of guide posts (22) are fixedly connected to the front of the connecting plate (21). A guide post spring (23) is sleeved on the outside of each of the plurality of guide posts (22). A protective net (24) is slidably connected to the adjacent side of each of the plurality of guide posts (22). A lower toothed plate (25) is fixedly connected to the top of the protective net (24). A gear (26) is rotatably connected to the front of the connecting plate (21). An upper toothed plate (27) is slidably connected to the front of the connecting plate (21). A sliding button (28) is fixedly connected to the top of the upper toothed plate (27). A support component (29) is slidably connected to the outside of the sliding button (28).

2. The fresh air fan casing according to claim 1, characterized in that: The replacement mechanism (4) includes two slide rails (41). The bottom of the two slide rails (41) is fixedly connected to the inner wall of the housing (1). A slider (42) is slidably connected to the top of the slide rails (41). A limit post (43) is slidably connected to the adjacent side of the two slide rails (41). A locking spring (44) is sleeved on the outside of the limit post (43). A moving block (45) is slidably connected to the inner wall of the limit post (43). A spring post (46) is fixedly connected to the bottom of the moving block (45). A button post (47) is slidably connected to the inner wall of the slider (42). A torsion spring (48) is sleeved on the outside of the button post (47). A connecting plate (49) is fixedly connected to the outside of the button post (47).

3. The fresh air fan casing according to claim 1, characterized in that: The support assembly (29) includes a protective shell (291), the rear side of which is fixedly connected to the front side of the connecting plate (21), and an outer shell (292) is fixedly connected to the front side of the protective shell (291).

4. A fresh air fan casing according to claim 1, characterized in that: The bottom of the upper toothed plate (27) is meshed with the outside of the gear (26), and the top of the lower toothed plate (25) is meshed with the outside of the gear (26).

5. A fresh air fan casing according to claim 2, characterized in that: The two locking springs (44) are fixedly connected to the inner wall of the slider (42) on opposite sides, and fixedly connected to the outside of the limiting post (43) on adjacent sides.

6. A fresh air fan casing according to claim 2, characterized in that: The top of the torsion spring (48) is fixedly connected to the bottom of the connecting plate (49), and the bottom of the torsion spring (48) is fixedly connected to the inner wall of the slider (42).

7. A fresh air fan casing according to claim 2, characterized in that: The bottoms of the two springs (46) are fixedly connected to the inner wall of the slider (42), and the top of the slider (42) is fixedly connected to the bottom of the blower (3).

8. A fresh air fan casing according to claim 3, characterized in that: The adjacent sides of the plurality of guide post springs (23) are fixedly connected to the distant sides of the two protective nets (24), and the distant sides of the plurality of guide post springs (23) are all fixedly connected to the inner wall of the protective shell (291).

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