Air curtain machine
By incorporating supply and return air ducts into the air curtain machine, and combining centrifugal fans and heat exchangers, the installation gap problem of the air curtain machine for large entrances has been solved, achieving a cold and hot air curtain effect without the need for an outdoor unit, and simplifying the installation process.
Patent Information
- Application Number
- CN202423052590.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-11
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-12-11
AI Technical Summary
Existing air curtain machines need to be installed in parallel in multiple places when facing the door opening, which easily leads to gaps at the joints, and it is impossible to realize the hot and cold air curtains, which require separate outdoor units.
An air curtain machine was designed, which adopts the structure of supply air duct and return air duct, combined with centrifugal fan and heat exchanger to form an air curtain. The supply air duct and return air duct are installed on both sides of the doorway. The airflow is driven by centrifugal fan to achieve the effect of cold and hot air curtain. The heat exchanger is installed in the fan box to adjust the airflow temperature.
It achieves an air curtain effect suitable for various door openings, and can realize hot and cold air curtains without the need for a separate outdoor unit. It is easy to install and has good results.
Smart Images
Figure CN223484424U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of air curtain machine technology, specifically an air curtain machine. Background Art
[0002] An air curtain machine uses a high-speed motor to drive a cross-flow or centrifugal fan to generate a powerful airflow, forming an invisible curtain that divides the indoor and outdoor areas into two independent temperature zones. This maintains the effectiveness of indoor air conditioning and air purification while blocking dust, insects, and other pollutants from entering the room. Existing air curtain machines are generally integrated ceiling-mounted or side-mounted units. Due to size limitations, multiple integrated air curtain machines can only be installed side by side when facing a doorway to meet the requirements, but gaps will appear at the joints, resulting in poor performance. To achieve both hot and cold air curtains, a separate outdoor unit is required. Utility Model Content
[0003] (a) Technical problems to be solved
[0004] In view of the shortcomings of the prior art, this utility model provides an air curtain machine that solves the problems mentioned in the background art.
[0005] (II) Technical Solution
[0006] To achieve the above objectives, this utility model provides the following technical solution: an air curtain machine, comprising a doorway, a top beam at the top of the doorway, a fan box fixedly installed at the middle position above the top beam, a heat exchanger fixedly installed inside one side of the fan box, a centrifugal fan fixedly installed inside the other side of the fan box, an air supply duct passing downward through the top beam connected to the outer side of the fan box near the centrifugal fan, an air outlet installed on the side of the air supply duct near the doorway, a swingable air guide plate installed inside the air outlet, a return air duct passing downward through the top beam connected to the outer side of the fan box near the heat exchanger, a side filter installed on the side of the return air duct near the doorway, and a top filter installed on the side of the return air duct near the inside of the fan box.
[0007] Preferably, a partition is provided in the middle of the fan box, which divides the fan box into two independent chambers. The heat exchanger is installed at the bottom of one of the chambers, and the centrifugal fan is installed on one side of the partition and placed in the other chamber. The centrifugal fan is installed at the same height as the upper port of the air supply duct.
[0008] Preferably, the supply air duct and the return air duct are the same size and are symmetrically installed on both sides of the doorway. When the centrifugal fan is working, it draws the air in the fan box from the side where the heat exchanger is installed into the supply air duct. At this time, the air is discharged from the air outlet on one side of the supply air duct and then drawn into the return air duct through the side filter and replenished into the fan box. This circulation forms an air curtain between the supply air duct and the return air duct.
[0009] Preferably, the height of the air outlet and the side filter is the same as the height of the doorway. A narrow air outlet can accelerate the exhaust of air, while a wide side filter can maximize the recovery of the airflow exhausted from the air outlet.
[0010] Preferably, the air outlet has front support bars and rear support bars evenly arranged inside the upper and lower parts. The rear support bar has a round hole in the middle for hinged to the rear of the air guide plate, and the front support bar has an arc-shaped hole in the middle for fixing the front of the air guide plate, so that the air guide plate can swing to change the direction of airflow.
[0011] Preferably, both the supply air duct and the return air duct are hollow boxes welded from thin steel plates, and are connected to the fan box by flanges and are internally interconnected. Except for the air inlet and outlet and the upper part, the supply air duct and the return air duct are airtight.
[0012] This utility model provides an air curtain machine, which has the following beneficial effects:
[0013] 1. This air curtain machine, through the coordinated arrangement of a fan box, a centrifugal fan, an air supply duct, and a return air duct, is suitable for various large door openings. A centrifugal fan is installed inside the fan box to form a box that can drive airflow in and out. Then, parallel return air ducts and air supply ducts are installed at the inlet and outlet. At this time, an air curtain is formed between the air supply duct and the return air duct. Since the air supply duct and return air duct have a simple structure, are lightweight, and are easy to install, they can be easily installed on both sides of the door opening. As long as the centrifugal fan has sufficient power, the air curtain can cover various large door openings.
[0014] 2. This air curtain machine, through the coordinated arrangement of the fan box, heat exchanger, and centrifugal fan, enables it to achieve the effect of a hot and cold air curtain without the need for a separate outdoor unit. The heat exchanger, which changes the airflow temperature, is directly installed inside the fan box, and the centrifugal fan directly drives the airflow through its interior. The airflow through the fan box changes the temperature, eliminating the need for a separate outdoor unit and making it very convenient to achieve a hot and cold air curtain. Attached Figure Description
[0015] Figure 1 This is a structural schematic diagram of the main view of this utility model;
[0016] Figure 2 This is a structural schematic diagram of the overall three-dimensional view of this utility model;
[0017] Figure 3 This is a structural schematic diagram of the first partial three-dimensional view of the present invention;
[0018] Figure 4 This is a structural schematic diagram of the second partial perspective view of the present invention;
[0019] Figure 5This is a partial enlarged view of the structure of this utility model.
[0020] In the diagram: 1. Doorway; 2. Top beam; 3. Fan box; 301. Partition; 4. Heat exchanger; 5. Centrifugal fan; 6. Supply air duct; 7. Air outlet; 8. Air guide plate; 9. Return air duct; 10. Side filter; 11. Front support bar; 12. Rear support bar. DETAILED DESCRIPTION
[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.
[0022] Please see Figures 1 to 5This utility model provides a technical solution: an air curtain machine, including a doorway 1, a top beam 2 at the top of the doorway 1, a fan box 3 fixedly installed at the middle position above the top beam 2, a heat exchanger 4 fixedly installed inside one side of the fan box 3, a centrifugal fan 5 fixedly installed inside the other side of the fan box 3, an air supply duct 6 connected to the outside of the fan box 3 near the centrifugal fan 5, passing downward through the top beam 2, a partition 301 provided at the middle position inside the fan box 3, the partition 301 dividing the fan box 3 into two independent cavities, and the heat exchanger 4 is installed in one of them. At the bottom of one cavity, a centrifugal fan 5 is installed on one side of a partition 301 and placed in another cavity. The centrifugal fan 5 is installed at the same height as the upper port of the air supply duct 6. An air outlet 7 is installed on the side of the air supply duct 6 near the doorway 1. An air outlet 7 has a swingable air guide plate 8 inside. A front support bar 12 and a rear support bar 13 are evenly arranged inside the air outlet 7. A round hole for hinged connection with the rear air guide plate 8 is opened in the middle of the rear support bar 13. A hole for fixing the front of the air guide plate 8 is opened in the middle of the front support bar 12. The square arc-shaped holes allow the air guide plate 8 to swing and change the direction of airflow. A return air duct 9, which passes downwards through the top beam 2, is connected to the outer side of the fan box 3 near the heat exchanger 4. Both the supply air duct 6 and the return air duct 9 are hollow boxes welded from thin steel plates, connected to the fan box 3 via flanges and internally interconnected. Except for the inlet and outlet ports and the upper part, the supply air duct 6 and the return air duct 9 are airtight. A side filter screen 10 is installed on the side of the return air duct 9 near the doorway 1. The supply air duct 6 and the return air duct 9 are the same size and symmetrically installed on both sides of the doorway 1. When the centrifugal fan 5 is working, it draws the air in the fan box 3 from the side where the heat exchanger 4 is installed into the air supply duct 6. At this time, the air is discharged from the air outlet 7 on one side of the air supply duct 6 and then drawn into the return air duct 9 through the side filter screen 10 and replenished into the fan box 3. This circulation forms an air curtain between the air supply duct 6 and the return air duct 9. The height of the air outlet 7 and the side filter screen 10 is the same as the height of the doorway 1. The narrow width of the air outlet 7 can accelerate the discharge of air, and the wide width of the side filter screen 10 can recover the air discharged from the air outlet 7 as much as possible.
[0023] In use, firstly, a simple supply air duct 6 and return air duct 9 are prefabricated according to the height of the doorway 1, i.e., only the lower vertical part and the air supply outlet 7 are made. Then, the two are installed vertically opposite each other according to the width of the doorway 1. Further, experiments are conducted by injecting different flow rates of air into the top of the prefabricated supply air duct 6 to determine the required airflow to form a qualified air curtain. Based on the experimental results, a centrifugal fan 5 that meets the requirements is selected. Then, a fan box 3 is made according to the size of the centrifugal fan 5. During on-site installation, firstly, the top beam 2 is fixed to the top of the doorway 1. Then, the fan box 3 is pre-placed in the middle position of the top beam 2. Then, the supply air duct 6 and the return air duct 9 are simultaneously inserted into the openings on both sides of the top beam 2, with the bottom end in contact with the ground. Then, the upper ends of the supply air duct 6 and the return air duct 9 are connected to the side of the fan box 3. Finally, the supply air... The lower ends of the air duct 6 and the return air duct 9 are fixed to the ground. The specific fixing method is determined according to the actual situation. It can be directly fixed by expansion bolts or by adding other support structures and fixing by welding. The fan box 3 is further fixed to the top of the top beam 2 and the gap between the top beam 2 and the supply air duct 6 and the return air duct 9 is sealed by expansion glue. After the installation is completed, the centrifugal fan 5 is turned on and the airflow is discharged from the air outlet 7 on one side of the supply air duct 6. Then, the direction of the airflow can be adjusted by the air guide plate 8 so that the airflow blows directly to the side filter screen 10. At this time, the fan box 3 draws air from the return air duct 9, that is, the airflow discharged from the air outlet 7 is directly drawn back to the fan box 3 from the side filter screen 10, thus forming a cycle and forming an air curtain in the doorway 1. The temperature of the air curtain can be directly changed by the heat exchanger 4 inside the fan box 3 without the need for an additional outdoor unit.
[0024] In summary, this air curtain machine has a centrifugal fan 5 installed inside the fan box 3 to form a box that can drive airflow in and out. Then, parallel return air ducts 9 and supply air ducts 6 are installed at the inlet and outlet. At this time, an air curtain is formed between the supply air duct 6 and the return air duct 9. Since the supply air duct 6 and the return air duct 9 have simple structures, are lightweight and easy to install, they can be easily installed on both sides of the doorway 1. As long as the centrifugal fan 5 has sufficient power, the air curtain can cover various doorways 1. The heat exchanger 4, which changes the airflow temperature, is directly installed inside the fan box 3, and the airflow is directly driven through its interior by the centrifugal fan 5. The airflow through the fan box 3 can change the temperature, eliminating the need for a separate outdoor unit to achieve a hot and cold air curtain, which is very convenient.
[0025] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. An air curtain machine, comprising a doorway (1), characterized in that: A top beam (2) is provided at the top of the doorway (1). A fan box (3) is fixedly installed at the middle position above the top beam (2). A heat exchanger (4) is fixedly installed inside one side of the fan box (3). A centrifugal fan (5) is fixedly installed inside the other side of the fan box (3). An air supply duct (6) that passes down through the top beam (2) is connected to the outside of the fan box (3) near the centrifugal fan (5). An air outlet (7) is installed on the side of the air supply duct (6) near the doorway (1). An air guide plate (8) that can swing is provided inside the air outlet (7). A return air duct (9) that passes down through the top beam (2) is connected to the outside of the fan box (3) near the heat exchanger (4). A side filter screen (10) is installed on the side of the return air duct (9) near the doorway (1).
2. The air curtain machine according to claim 1, characterized in that: A partition (301) is provided in the middle of the fan box (3). The partition (301) divides the fan box (3) into two independent cavities. The heat exchanger (4) is installed at the bottom of one of the cavities. The centrifugal fan (5) is installed on one side of the partition (301) and placed in the other cavity. The centrifugal fan (5) is installed at the same height as the upper port of the air supply duct (6).
3. The air curtain machine according to claim 1, characterized in that: The supply air duct (6) and return air duct (9) are the same size and are symmetrically installed on both sides of the doorway (1). When the centrifugal fan (5) is working, it draws the air in the fan box (3) from the side where the heat exchanger (4) is installed into the supply air duct (6). At this time, the air is discharged from the air outlet (7) on one side of the supply air duct (6) and then drawn into the return air duct (9) through the side filter (10) and replenished into the fan box (3). This circulation forms an air curtain between the supply air duct (6) and the return air duct (9).
4. The air curtain machine according to claim 1, characterized in that: The height of the air outlet (7) and the side filter (10) is the same as the height of the doorway (1). The narrow width of the air outlet (7) can accelerate the exhaust of airflow, while the wide width of the side filter (10) can maximize the recovery of the airflow exhausted from the air outlet (7).
5. The air curtain machine according to claim 1, characterized in that: The air outlet (7) is evenly provided with a front support bar (11) and a rear support bar (12) inside. A round hole for hinge with the rear air guide plate (8) is provided in the middle position of the rear support bar (12), and an arc-shaped hole for fixing the front of the air guide plate (8) is provided in the middle position of the front support bar (11), so that the air guide plate (8) can swing to change the direction of airflow.
6. The air curtain machine according to claim 1, characterized in that: Both the supply air duct (6) and the return air duct (9) are hollow boxes made of thin steel plates. They are connected to the fan box (3) through flanges and are internally connected. Except for the air inlet and outlet and the upper part, the supply air duct (6) and the return air duct (9) are airtight.