A combined air handling unit fresh air outlet filter device

Abstract

The utility model relates to air filtration technical field, concretely relates to a combined air handling unit fresh air outlet filter device, including electrically operated split leaf regulating valve, the outside detachable installation of electrically operated split leaf regulating valve has filter device, the inside of filter device is provided with the filter cotton convenient to detach, the one end of filter device is provided with the differential pressure gauge for detecting the differential pressure of filter device both ends. The utility model through the preliminary filtration of grid plate and filter cotton, reduce the replacement frequency of unit inside primary efficiency, medium efficiency, high efficiency filter, through the inspection, primary efficiency filter is cleaned or replaced once a month before installation, can realize cleaning or replacement once every quarter after installation, reduce staff work intensity, improve work efficiency, filter device can be disassembled through fixed bolt, replace filter cotton, and the cost price of filter cotton is far lower than primary efficiency, medium efficiency, high efficiency filter cost price, produces economic benefits, reduces equipment maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of air filtration technology, specifically to a fresh air inlet filtration device for a combined air handling unit. Background Technology

[0002] In 100% fresh air operation mode, combined air handling units (BJUs) introduce only fresh outdoor air, which is then filtered, cooled or heated, humidified or dehumidified before being directly supplied to the room. No indoor return air is used; the entire system relies on fresh outdoor air to meet indoor air quality and environmental requirements. In mixed air operation mode, fresh outdoor air is mixed with indoor return air in a certain proportion, then processed before being supplied to the room. By adjusting the ratio of fresh and return air, the air handling effect and energy consumption can be flexibly controlled according to changes in the indoor and outdoor environment and indoor load demands. In recirculating air operation mode, only indoor air is recirculated; indoor air is extracted, filtered, cooled, heated, and humidified before being returned to the room, without introducing fresh outdoor air. Currently, combined BJUs only have pre-filters, medium-efficiency filters, and high-efficiency filters installed within the unit. During 100% fresh air and mixed air operation modes, larger particulate pollutants such as dust, debris, and leaves from the outdoor air may enter the unit, accelerating the wear and tear of these filters.

[0003] Therefore, it is necessary to invent a combined air handling unit fresh air inlet filtration device to solve the above problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a combined air handling unit fresh air inlet filtration device, which solves the problem that during actual use, when the unit is operating in 100% fresh air mode and mixed air mode, larger particulate pollutants such as dust, debris, and leaves in the outdoor air may enter the unit and accelerate the wear and tear of the primary, medium, and high efficiency filters.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A combined air handling unit fresh air inlet filtration device includes an electrically operated double-leaf regulating valve, a detachable filter device is installed on the outside of the electrically operated double-leaf regulating valve, the filter device is provided with easily removable filter cotton inside, and a differential pressure gauge is provided at one end of the filter device for detecting the pressure difference between the two ends of the filter device.

[0006] As a preferred embodiment of this utility model, the filtration device includes a first grid plate, a filter cotton, and a second grid plate. The first grid plate and the second grid plate are detachably installed on the outside of the electric double-leaf regulating valve by fixing bolts, and the filter cotton is located between the first grid plate and the second grid plate.

[0007] As a preferred embodiment of this utility model, the electric split-leaf regulating valve includes blades and a frame. The outline of the frame is connected to the air handling unit body. The inner side of the frame is rotatably connected to multiple blades, and the rotation axis of the blades extends to the outer side of the frame.

[0008] As a preferred embodiment of this utility model, the frame has multiple bolt holes on the side facing the filter device, and the positions of the bolt holes correspond to the positions of the fixing bolts.

[0009] As a preferred embodiment of this utility model, the outlines of the frame edges of the first and second grid plates are adapted to the outlines of the frame.

[0010] In a preferred embodiment of this utility model, the two ends of the differential pressure gauge detection end are respectively located on both sides of the filter cotton.

[0011] As a preferred embodiment of this utility model, stainless steel wire mesh is welded to the inner side of the frame of the first grid plate and the second grid plate.

[0012] The technical effects and advantages provided by this utility model in the above technical solution are as follows: In this invention, by installing filter cotton inside the filter device, outdoor air can be initially filtered during the operation of the air handling unit in both fresh air and mixed air modes, intercepting larger pollutants. The preliminary filtration by the mesh plate and filter cotton reduces the frequency of replacement of the pre-filter, medium-efficiency filter, and high-efficiency filter inside the unit. Testing showed that before installation, the pre-filter only needed monthly cleaning or replacement; after installation, it only needs quarterly cleaning or replacement, reducing employee workload and improving work efficiency. The filter device can be disassembled using fixing bolts to replace the filter cotton. The cost of the filter cotton is far lower than the cost of the pre-filter, medium-efficiency filter, resulting in economic benefits and reducing equipment maintenance costs. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall main structure of this utility model; Figure 2 This is a side view of the filter device of this utility model. Figure 3 This utility model Figure 2 Enlarged structural diagram at point A in the middle; Figure 4 This is a schematic diagram of the overall structure of the filtration device of this utility model; Figure 5 This is a schematic diagram of the structure of the electric split-leaf regulating valve of this utility model.

[0014] Explanation of reference numerals in the attached drawings: 1. Air handling unit body; 3. Electric double-leaf regulating valve; 301. Blade; 302. Frame; 303. Bolt hole; 5. Filter device; 501. Grid plate one; 502. Filter cotton; 503. Grid plate two; 504. Fixing bolt; 6. Differential pressure gauge. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0016] This utility model provides, for example Figure 1-5 The illustrated combined air handling unit's fresh air inlet filtration device includes an electrically operated double-leaf regulating valve 3. A filter device 5 is detachably mounted on the outside of the electrically operated double-leaf regulating valve 3. The filter device 5 contains easily removable filter cotton 502. A differential pressure gauge 6 is installed at one end of the filter device 5 to detect the pressure difference between its two ends. While controlling the fresh air intake, the device performs preliminary filtration of the fresh air and automatically monitors the clogging status of the filter device 5, ensuring its efficient and reliable operation and facilitating maintenance.

[0017] The filter device 5 includes a first mesh plate 501, a filter cotton 502, and a second mesh plate 503. The first mesh plate 501 and the second mesh plate 503 are detachably installed on the outside of the electric double-leaf regulating valve 3 by fixing bolts 504. The filter cotton 502 is located between the first mesh plate 501 and the second mesh plate 503. By removing the fixing bolts 504, the first mesh plate 501 in the filter device 5 can be quickly disassembled, facilitating the disassembly of the filter cotton 502 and the cleaning of the filter device 5, thus reducing maintenance difficulty.

[0018] The electrically operated multi-leaf regulating valve 3 includes blades 301 and a frame 302. The outline of the frame 302 is connected to the air handling unit body 1. The inner side of the frame 302 is rotatably connected to multiple blades 301, and the rotation axis of the blades 301 extends to the outer side of the frame 302. By controlling the rotation of the blades 301, the fresh air speed can be effectively adjusted.

[0019] The frame 302 has multiple bolt holes 303 on the side facing the filter device 5, and the positions of the bolt holes 303 correspond to the positions of the fixing bolts 504. The bolt holes 303 facilitate the installation of the filter device 5 on the outside of the electric double-leaf regulating valve 3, which facilitates filtration of the entire air intake end of the electric double-leaf regulating valve 3. At the same time, by increasing the area of ​​the filter device 5 and the electric double-leaf regulating valve 3, the air intake rate of the air handling unit 1 is guaranteed, and large impurities are prevented from entering the interior of the air handling unit 1 through the gaps.

[0020] The outlines of the frames of the first grid plate 501 and the second grid plate 503 are adapted to the outline of the frame 302. By restricting the outlines of the filter device 5 and the electric double-leaf regulating valve 3, comprehensive filtration of outside air is ensured.

[0021] The two ends of the differential pressure gauge 6 are respectively located on both sides of the filter cotton 502. The differential pressure gauge 6 is used to collect the pressure difference between the two ends of the filter device, and to determine whether the filter cotton 502 needs to be replaced based on the selected grade of the filter cotton 502, so as to ensure that the air intake rate of the air inlet 4 of the air handling unit 1 meets the usage requirements.

[0022] Stainless steel wire mesh is welded to the inner sides of the frames of the first grid plate 501 and the second grid plate 503. The stainless steel wire mesh is used to cover the filter cotton 502 in the middle to prevent the filter cotton 502 from deforming or falling off. The stainless steel wire mesh is designed to facilitate disassembly, rinsing, and cleaning of surface dirt.

[0023] This invention, by installing filter cotton 502 inside the filter device 5, can initially filter outdoor air and intercept larger pollutants during the operation of the air handling unit 1 in both fresh air and mixed air modes. Through the preliminary filtration of the mesh plate and filter cotton 502, the replacement frequency of the pre-filter, medium-efficiency filter, and high-efficiency filter inside the unit is reduced. Testing showed that before installation, the pre-filter only needed to be cleaned or replaced monthly; after installation, it only needs to be cleaned or replaced quarterly, reducing employee workload and improving work efficiency. The filter device 5 can be disassembled using fixing bolts 504 to replace the filter cotton 502. The cost of the filter cotton 502 is far lower than the cost of the pre-filter, medium-efficiency filter, and high-efficiency filter, generating economic benefits and reducing equipment maintenance costs.

[0024] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A fresh air inlet filtration device for a combined air handling unit, characterized in that: The device includes an electric split-leaf regulating valve (3), on the outside of which a filter device (5) is detachably installed. Inside the filter device (5) is a filter cotton (502) that is easy to remove. At one end of the filter device (5) is a differential pressure gauge (6) for detecting the pressure difference between the two ends of the filter device (5).

2. The combined air handling unit fresh air inlet filtration device according to claim 1, characterized in that: The filter device (5) includes a first grid plate (501), a filter cotton (502) and a second grid plate (503). The first grid plate (501) and the second grid plate (503) are detachably installed on the outside of the electric split-leaf regulating valve (3) by fixing bolts (504). The filter cotton (502) is located between the first grid plate (501) and the second grid plate (503).

3. The combined air handling unit fresh air inlet filtration device according to claim 2, characterized in that: The electric split-leaf regulating valve (3) includes blades (301) and a frame (302). The outline of the frame (302) is connected to the air handling unit body (1). The inner side of the frame (302) is rotatably connected to multiple blades (301). The rotating shaft of the blades (301) extends to the outer side of the frame (302).

4. The combined air handling unit fresh air inlet filtration device according to claim 3, characterized in that: The frame (302) has multiple bolt holes (303) on the side facing the filter device (5), and the positions of the bolt holes (303) correspond to the positions of the fixing bolts (504).

5. The combined air handling unit fresh air inlet filtration device according to claim 3, characterized in that: The outlines of the frames of the first grid plate (501) and the second grid plate (503) are adapted to the outline of the frame (302).

6. The combined air handling unit fresh air inlet filtration device according to claim 1, characterized in that: The two ends of the differential pressure gauge (6) are respectively set on both sides of the filter cotton (502).

7. The combined air handling unit fresh air inlet filtration device according to claim 2, characterized in that: Stainless steel wire mesh is welded to the inner side of the frame of the first grid plate (501) and the second grid plate (503).

Images