Air handling unit with direct drive fan

Abstract

The utility model discloses a kind of air handling units with direct connection fan, including box, box is divided into N chambers by partition, from left to right, it is first to N chamber respectively;Each partition is opened with air hole;The air inlet is opened on the box wall of first chamber, and plate filter and heat exchanger are sequentially arranged in first chamber from left to right;Fan and motor connected in front and back are equipped in second chamber;The air outlet is opened on the box wall of N chamber;Fan outlet and the air hole soft connection of right side partition;Motor output shaft is connected with fan input shaft through coupling;First slide rail is equipped in second chamber bottom, fan seat is placed on first slide rail and is slidably connected with first slide rail along front and back direction, after connecting motor output shaft and fan input shaft, fan seat is fixedly connected with box;Air flows out through air outlet after sequentially passing plate filter and heat exchanger. The utility model is compact in structure, small in size, save space. It is suitable for the application occasion of high clean precision demand.

Description

Technical Field

[0001] This utility model relates to an air handling unit, and more particularly to an air handling unit with a direct-drive fan. Background Technology

[0002] Currently, air handling units mostly use belt drives between the fan impeller and the motor. The belt is a crucial transmission system connecting the fan motor and the impeller, ensuring a stable output speed during operation. It transfers the motor's rotational power to the fan impeller and rotates it through pressure. Due to the belt's elasticity and resilience, the speed can be easily buffered and adjusted, thus ensuring the fan's effective operation.

[0003] The pulley is a key component of the wind turbine's transmission system, directly impacting the turbine's power and performance. Specifically, the pulley's thickness and edge geometry affect the belt's contact area and tension distribution, thus influencing transmission efficiency. Wear or mismatch in the pulley will lead to decreased transmission efficiency. Imbalance in the wind turbine pulleys can cause vibration and noise, affecting operational stability. Slippage between the pulley and belt can result in unstable operation, vibration, and noise. Wear on both the pulley and belt is a significant factor affecting the transmission's lifespan. Wear or irregularities on the pulley surface will accelerate belt wear, shortening its lifespan.

[0004] Using belt drives for wind turbines increases energy consumption, reduces efficiency, and shortens lifespan. Therefore, the pulley of the wind turbine pulley has a significant impact on the turbine's power output.

[0005] In addition, to ensure the normal operation of the fan and extend its service life, it is necessary to regularly check the wear of the pulleys and belts, and regularly adjust the belt tension. For the bumps and vibrations caused by the imbalance of the fan pulleys, dynamic balancing of the pulleys is also required.

[0006] Therefore, traditional belt drive systems for wind turbines suffer from problems such as low efficiency, frequent maintenance, dust generation, and high maintenance labor costs. Summary of the Invention

[0007] This utility model provides an air handling unit with a direct-drive fan to solve the technical problems existing in the prior art.

[0008] The technical solution adopted by this utility model to solve the technical problems existing in the prior art is as follows:

[0009] An air handling unit with a direct-drive fan includes a housing, which is divided into N chambers by partitions, designated as chambers one through N from left to right. Each partition has a vent hole. The first chamber has an air inlet on its wall, and a plate filter and a heat exchanger are arranged sequentially from left to right within the first chamber. A fan and a motor are connected in a front-to-back configuration in the second chamber. The Nth chamber has an air outlet on its wall. The fan has an air inlet and an air outlet, with its outlet flexibly connected to the vent hole in the right-side partition. The motor output shaft is connected to the fan input shaft via a coupling. The bottom of the second chamber has a first slide rail, on which a fan base is placed and slides in a front-to-back direction. After connecting the motor output shaft and the fan input shaft, the fan base is fixed relative to the housing.

[0010] Furthermore, a direct-drainage wet membrane is also provided in the first chamber; the direct-drainage wet membrane is perpendicular to the bottom surface of the chamber and located on the right side of the heat exchanger, and a water receiving tray is provided below it for collecting water falling from the direct-drainage wet membrane.

[0011] Furthermore, N=4, a flow equalization plate is provided in the third chamber, and the flow equalization plate is located at the vent hole of the partition that is connected to the air outlet of the fan; a bag filter is provided in the fourth chamber, and the opening end of the bag filter is connected to the vent hole of the partition between the third and fourth chambers.

[0012] Furthermore, the heat exchanger includes a cooling coil and a heating coil; the refrigerant or working fluid flows through the inner cavity of the cooling coil.

[0013] Furthermore, the heating coil is a coil in which a heat transfer fluid flows through its inner cavity or a coil with an internal electric heating wire.

[0014] Furthermore, a condensate collection tray is provided below the surface cooling coil for collecting condensate.

[0015] Furthermore, the plate filter includes multiple individual filters; the first chamber is provided with a groove for inserting individual filters, and the individual filters are slidably inserted into the groove; the individual filters are provided with buckles on both sides for connecting two adjacent individual filters.

[0016] Furthermore, it also includes an external filter, which is a bag filter located on the outside of the housing and mounted on a frame fixed to the housing. Its open end is connected to the air outlet on the housing wall of the Nth chamber.

[0017] Furthermore, the enclosure is formed by a frame and a sandwich color steel plate sealed together; the sandwich color steel plate includes two layers of color steel plates, an inner and an outer layer, and an intermediate insulation filling layer; the color steel plates are galvanized plates, cold-rolled plates, stainless steel plates, or aluminum-magnesium-manganese plates; the materials of the intermediate insulation filling layer include polyurethane, rock wool, and glass wool; the bottom of the enclosure is provided with insertion holes or slots for fork insertion.

[0018] Furthermore, a second slide rail is provided at the bottom of the second chamber, and the motor base is placed on the second slide rail and slides in cooperation with the second slide rail in the left and right direction.

[0019] The advantages and positive effects of this utility model are as follows: This utility model adopts a direct-drive fan, connecting the motor shaft and the fan shaft through a coupling, eliminating intermediate transmission links, transmitting torque and speed, achieving efficient power transmission, significantly improving efficiency and simplifying the structure; it also solves the problem of axial, radial, or angular deviations caused by thermal expansion and mechanical deformation during installation or operation; in addition, the direct-drive fan, through the coupling, can absorb vibration, reduce noise, and extend the service life of the equipment. With its high reliability, convenient maintenance, and dust-free operation, the direct-drive fan with coupling is compact in structure, small in size, and space-saving. It offers various temperature and humidity adjustments. It is suitable for applications requiring high cleanliness and precision.

[0020] It can be widely used in laboratories, clean rooms, electronics factories, explosion-proof chemical plants, and other occasions. With the advancement of precision manufacturing and materials technology, direct-drive fans will continue to optimize the overall performance of air conditioning systems in terms of energy efficiency improvement and intelligent maintenance. Attached Figure Description

[0021] Figure 1 This is a front view of an air handling unit with a direct-drive fan of this utility model when some of the access doors are not installed.

[0022] Figure 2 This is a partial sectional view of an air handling unit with a direct-drive fan according to this utility model.

[0023] In the diagram: 1. Air inlet; 2. Inspection door; 3. Plate filter; 4. Cooling coil; 4-1. Cooling coil inlet / outlet water pipe interface; 5. Heating coil; 5-1. Heating coil inlet / outlet water pipe interface; 6. Direct drain wet membrane; 7. Fan; 8. Flow equalization plate; 9. Bag filter; 10. Air outlet; 11. Water tray; 12. Box panel; 13. Box base; 14. First slide rail; 15. Fan base; 16. Motor; 17. Second slide rail; 18. Partition. Detailed Implementation

[0024] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0025] In the description of this utility model, the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and do not require that this utility model be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. The terms "connected" and "linked" used in this utility model should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a direct connection or an indirect connection through intermediate components; or an electrical connection or signal transmission. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0026] Please see Figures 1 to 2 An air handling unit with a direct-drive fan includes a housing, which is divided into N chambers by partitions 18, numbered from first to Nth from left to right. Each partition 18 has a vent hole. The housing wall of the first chamber has an air inlet 1, and a plate filter 3 and a heat exchanger are arranged sequentially from left to right in the first chamber. The second chamber has a fan 7 and a motor 16 connected front to back, with the output shaft of the motor 16 and the input shaft of the fan 7 aligned in the front-to-back direction. The housing wall of the Nth chamber has an air outlet 10. The fan 7 has an air inlet and an air outlet, and its air outlet is flexibly connected to the vent hole of the right-side partition 18. The output shaft of the motor 16 is connected to the input shaft of the fan 7 via a coupling. The bottom of the second chamber has a first slide rail 14, which is parallel to the axis of the fan input shaft.

[0027] The fan base 15 is placed on the first slide rail 14 and slides in the front-to-back direction with the first slide rail 14. The fan base 15 is moved back and forth so that the output shaft of the motor 16 is close to the input shaft of the fan 7, and then connected by a coupling.

[0028] After connecting the output shaft of motor 16 to the input shaft of fan 7, the fan base 15 is fixed relative to the housing. When the motor drives the fan to rotate, air flows into the first chamber from the air inlet 1, passes through the plate filter 3 for filtration and the heat exchanger for heat exchange, enters the air inlet of fan 7, is output from the air outlet of fan 7, and finally flows out through the air outlet 10.

[0029] Preferably, a direct drainage wet membrane 6 may also be provided in the first chamber; the direct drainage wet membrane 6 is perpendicular to the bottom surface of the box and located on the right side of the heat exchanger, and a water receiving tray for collecting water falling from the direct drainage wet membrane 6 may be provided below it.

[0030] Preferably, N=4, a flow equalization plate 8 can be provided in the third chamber, and the flow equalization plate 8 can be located at the vent of the partition 18 connected to the air outlet of the fan 7; a bag filter can be provided in the fourth chamber, and the opening end of the bag filter is connected to the vent of the partition 18 between the third and fourth chambers.

[0031] Preferably, the heat exchanger may include a cooling coil 4 and a heating coil 5; the refrigerant or working fluid flows through the inner cavity of the cooling coil 4.

[0032] Preferably, the heating coil 5 can be a coil through which a heat medium flows in its inner cavity or a coil with an electric heating wire inside.

[0033] Preferably, a water collection tray for collecting condensate is provided below the surface cooling coil 4.

[0034] like Figure 1 As shown, the water collection tray and the water receiving tray can be made into one piece, collectively referred to as water tray 11.

[0035] Preferably, the plate filter 3 may include multiple single-piece filters; the first chamber may be provided with a sliding groove for inserting single-piece filters, and the single-piece filters are slidably inserted into the sliding groove; the two sides of the single-piece filters may be provided with buckles for connecting two adjacent single-piece filters.

[0036] Preferably, it may also include an external filter, which may be a bag filter 9, located outside the housing, mounted on a frame fixed to the housing, and its open end connected to the air outlet on the housing wall of the Nth chamber.

[0037] Preferably, the box body can be formed by a frame and a sandwich color steel plate sealed together; the sandwich color steel plate includes two layers of color steel plates, inner and outer, and an intermediate insulation filling layer; the color steel plate can be galvanized plate, cold-rolled plate, stainless steel plate, or aluminum-magnesium-manganese plate; the material of the intermediate insulation filling layer can include polyurethane, rock wool, or glass wool; the bottom of the box body is provided with insertion holes or slots for fork insertion.

[0038] Preferably, the bottom of the second chamber may also be provided with a second slide rail 17, and the motor 16 seat is placed on the second slide rail 17 and can slide and cooperate with the second slide rail 17 in the left and right directions.

[0039] The structure and working principle of this utility model are further illustrated below with a preferred embodiment:

[0040] An air handling unit with a direct-drive fan includes a housing divided into four chambers by partitions 18, designated as chambers one through four from left to right. Each partition 18 has a vent hole. The first chamber has an air inlet 1 on its wall. Inside the first chamber, a plate filter 3, a heat exchanger, and a direct-drain wet membrane 6 are arranged sequentially from left to right. The direct-drain wet membrane 6 is perpendicular to the bottom surface of the housing and located to the right of the heat exchanger. Below the heat exchanger and the direct-drain wet membrane 6, a water tray 11 is provided to collect water falling from the direct-drain wet membrane 6. The second chamber has a fan 7 connected front to back and a motor 16 driving the fan 7. The fourth chamber has an air outlet 10 on its wall. The fan 7 has an air inlet and an air outlet, and its air outlet is flexibly connected to the vent hole of the partition 18 on the right side, i.e., the air outlet of the fan 7 is connected to the vent hole of the partition 18 between the second and third chambers.

[0041] A flow equalization plate 8 is installed in the third chamber, located at the vent of the partition 18 that connects to the air outlet of the fan 7; a bag filter is installed in the fourth chamber, with its open end connected to the vent of the partition 18 between the third and fourth chambers. The flow equalization plate 8 is used to ensure uniform airflow, reduce pressure differential, and facilitate subsequent filtration.

[0042] The output shaft of motor 16 is connected to the input shaft of fan 7 via a coupling; the bottom of the second chamber is provided with a first slide rail 14, and the fan base 15 is placed on the first slide rail 14 and slides in the front-back direction with the first slide rail 14. After moving the fan base 15 back and forth, the output shaft of motor 16 is connected to the input shaft of fan 7, so that the fan base 15 is fixed relative to the housing; air flows into the first chamber from the air inlet 1, passes through the plate filter 3 for filtration, the heat exchanger for heat exchange, and the direct drainage wet film 6 for humidity adjustment, and then enters the air inlet of fan 7, is output from the air outlet of fan 7, passes through the bag filter for filtration, and finally flows out through the air outlet 10.

[0043] The fan base 15 can move back and forth, which facilitates the disassembly and assembly of the coupling and also makes future maintenance easier.

[0044] The heat exchanger includes a cooling coil 4 and a heating coil 5. The refrigerant or cooling medium flows through the inner cavity of the cooling coil 4 via the inlet / outlet water pipe interface 4-1. The heating coil 5 is a coil through which the heat transfer fluid flows. The heat transfer fluid flows through the inner cavity of the heating coil 5 via the inlet / outlet water pipe interface 5-1.

[0045] Cooling coil 4 is used to lower the temperature of the passing air, and heating coil 5 is used to raise the temperature of the passing air.

[0046] The plate filter 3 includes multiple individual filters; the first chamber is provided with a sliding groove for inserting individual filters, which are slidably inserted into the groove; each individual filter has a latch on both sides for connecting two adjacent individual filters. The insert-type individual filters are easy to replace, allowing one or more filters to be replaced. The individual filters slide in the groove, making maintenance more convenient.

[0047] The box body is formed by a frame and a sandwich color steel plate sealed together; the sandwich color steel plate includes two layers of color steel plates, inner and outer, and an intermediate insulation filling layer; the color steel plate is galvanized plate; the material of the intermediate insulation filling layer includes polyurethane; the bottom of the box body is provided with insertion holes for forks.

[0048] The bottom of the second chamber is also equipped with a second slide rail 17. The motor 16 is placed on the second slide rail 17 and slides in the left and right direction with the second slide rail 17. The left and right movement of the motor 16 can facilitate the alignment of the output shaft of the motor 16 with the input shaft of the fan 7.

[0049] The panel filter 3 is a pre-filter, located on the air inlet side of the unit, and is fixed by a stainless steel support. The individual filter pieces have aluminum alloy frames and are made of synthetic fiber. Individual filter pieces of the same height are connected by snap-fit ​​fasteners and can be pulled out of the slide for easy maintenance. Individual filter pieces are mainly used to filter large particles in the air, with a filtration accuracy typically between 5-100μm. In industrial production, they are often used for pre-treatment to protect downstream high-efficiency filters.

[0050] The cooling coil 4 and heating coil 5 are made of copper tubes and aluminum foil. Different circuit structures, fin numbers, and copper tube rows are selected according to the required cooling and heating. When cold water or hot water is passed through, they can cool and dehumidify or heat the air.

[0051] The direct drainage wet membrane 6 is made of organic plant fiber. After being fixed to the heating coil 5, water is sprayed onto the wet membrane to increase the humidity of the air passing through it.

[0052] The fan 7 is a direct-drive centrifugal fan 7 with a coupling, which drives the fan 7 motor 16 to rotate at the same speed. The motor 16 is a three-phase asynchronous motor 16, and the model of the motor 16 is selected based on the absorption power of the fan 7 calculated according to the air volume and total static pressure.

[0053] Bag filter 9 is a medium-efficiency filter, with a filtration accuracy generally between 1-5μm.

[0054] The stainless steel water pan 11 is located below the surface cooling coil 4 and the direct drainage wet film 6. In summer, the condensate from the cooling and dehumidification of the coil and the humidifying water from the direct drainage wet film 6 can fall directly into the water pan 11 and flow out of the unit through the drain outlet on the side of the water pan 11.

[0055] The box panel 12 is made of galvanized steel sheet and white color steel sheet as the outer surface, and is integrally foamed by filling with polyurethane material. It has the advantages of high strength and no deformation, good anti-cold bridge effect and low air leakage rate.

[0056] For ease of maintenance, each chamber has one or more maintenance doors 2.

[0057] The bottom of the box is equipped with a galvanized box base 13, and the box is fixed to the box base 13 with bolts. The box base 13 is provided with insertion holes or slots for forklifts to facilitate forklift handling, and has lifting holes for ceiling installation. The fan base 15 is made of channel steel, which provides sufficient load-bearing capacity for the fan 7 and motor 16. The fan 7 and motor 16 are mounted on guide rails.

[0058] When the unit is operating, the three-phase asynchronous motor 16 is started. In summer, the water valve of the cooling coil 4 is activated to introduce chilled water. After the air passes through the plate filter 3 to remove larger dust particles, it is then cooled and dehumidified by the cooling coil 4 to achieve the required room temperature and humidity. Finally, it passes through the bag filter to remove smaller dust particles, ensuring the room is clean before being supplied with air. In winter, the air passes through the pre-filter, is heated by the heating coil 5, and then enters the wet membrane humidification system before being supplied with air through the medium-efficiency filter. The enclosure serves to seal and insulate the interior of the unit.

[0059] The aforementioned components, structures, and devices, such as couplings, fans 7, motors 16, bag filters 9, single-piece filters, housings, heat exchangers, surface cooling coils 4, direct drainage wet membranes 6, heating coils 5, flow equalization plates 8, and partitions 18, can all use applicable components, structures, and devices from the existing technology, and be connected and installed using conventional technical means.

[0060] The above embodiments are only used to illustrate the technical ideas and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. The patent scope of this utility model cannot be limited by these embodiments alone. That is, any equivalent changes or modifications made to the spirit disclosed in this utility model still fall within the patent scope of this utility model.

Claims

1. An air handling unit with a direct-drive fan, characterized in that, The device includes a housing, which is divided into N chambers by partitions, numbered from left to right as chamber 1 to chamber N. Each partition has a vent. The first chamber has an air inlet on its wall, and a plate filter and a heat exchanger are arranged sequentially from left to right within the first chamber. The second chamber contains a fan and a motor connected front to back. The Nth chamber has an air outlet on its wall. The fan has an air inlet and an air outlet, and its air outlet is flexibly connected to the vent on the right-side partition. The motor output shaft is connected to the fan input shaft via a coupling. The bottom of the second chamber has a first slide rail, and the fan base is placed on the first slide rail and slides along it in the front-back direction. After connecting the motor output shaft and the fan input shaft, the fan base is fixed relative to the housing.

2. The air handling unit with a direct-drive fan according to claim 1, characterized in that, The first chamber is also equipped with a direct drainage wet membrane; the direct drainage wet membrane is perpendicular to the bottom surface of the chamber and located on the right side of the heat exchanger, and a water receiving tray is provided below it for collecting the water falling from the direct drainage wet membrane.

3. The air handling unit with a direct-drive fan according to claim 1, characterized in that, N=4. A flow equalization plate is installed in the third chamber, and the flow equalization plate is located at the vent hole of the partition that connects to the air outlet of the fan. A bag filter is installed in the fourth chamber, and the opening end of the bag filter is connected to the vent hole of the partition between the third and fourth chambers.

4. The air handling unit with a direct-drive fan according to claim 1, characterized in that, The heat exchanger includes a cooling coil and a heating coil; the refrigerant or working fluid flows through the inner cavity of the cooling coil.

5. The air handling unit with a direct-drive fan according to claim 4, characterized in that, The heating coil is a coil in which a heat transfer fluid flows through its inner cavity or a coil with an internal electric heating wire.

6. The air handling unit with a direct-drive fan according to claim 4, characterized in that, A condensate tray is located below the cooling coil to collect condensate.

7. The air handling unit with a direct-drive fan according to claim 1, characterized in that, The plate filter includes multiple individual filters; the first chamber is provided with a sliding groove for inserting individual filters, and the individual filters are slidably inserted into the sliding groove; the two sides of the individual filters are provided with buckles for connecting two adjacent individual filters.

8. The air handling unit with a direct-drive fan according to claim 1, characterized in that, It also includes an external filter, which is a bag filter located on the outside of the housing and mounted on a frame fixed to the housing. Its open end is connected to the air outlet on the housing wall of the Nth chamber.

9. The air handling unit with a direct-drive fan according to claim 1, characterized in that, The enclosure is made of a frame and a sandwich color steel plate sealed together; the sandwich color steel plate includes two layers of color steel plates, inner and outer, and an intermediate insulation filling layer; the color steel plates are galvanized plates, cold-rolled plates, stainless steel plates, and aluminum-magnesium-manganese plates; the materials of the intermediate insulation filling layer include polyurethane, rock wool, and glass wool; the bottom of the enclosure is provided with insertion holes or slots for fork insertion.

10. The air handling unit with a direct-drive fan according to claim 1, characterized in that, The bottom of the second chamber is also provided with a second slide rail, and the motor base is placed on the second slide rail and slides in a left-right direction with the second slide rail.

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