A circumferentially uniform air supply active cold beam end device with a ring array of nozzles

Abstract

This invention discloses a circumferentially uniformly air-distributing active cooling beam end device with annular array nozzles, comprising a static pressure box, an end shell, a guide plate, and an induction panel. The static pressure box has a fresh air inlet on its side wall, and one end has a ring array of nozzles. The end shell is coaxially and sealed to the lower end of the static pressure box. The guide plate is built into the end shell, forming an annular air outlet with the guide plate. The annular air outlet communicates with the nozzles. The induction panel is installed on the side of the guide plate opposite to the nozzles, and has a plurality of uniformly distributed induction through holes that communicate with the annular air outlet. This circumferentially uniformly air-distributing active cooling beam end device enables full-circumferential air distribution, significantly improving airflow uniformity, induction and heat exchange efficiency, effectively enhancing the overall cooling capacity, and offering flexible installation and wider applicability.

Description

Technical Field

[0001] This invention relates to the field of air conditioning ventilation terminal technology, and specifically to a circumferentially uniform air supply active cooling beam terminal device with annular array nozzles. Background Technology

[0002] Active cooling beams, as low-noise and energy-saving air conditioning ventilation terminals, are now widely used in enclosed spaces with high requirements for indoor thermal comfort, such as hotels, office buildings, and cruise ship cabins. Currently, most mainstream active cooling beams adopt a double-sided air supply structure. Primary air is directionally ejected from nozzles on both sides of the equipment, and secondary air is mixed with the airflow and then delivered from the side vents. This structure has many unavoidable defects in actual use.

[0003] First, the airflow organization is uneven. The dual-sided directional air outlets can only cover the areas on both sides of the equipment, and airflow blind spots and temperature dead zones are easily formed in the center of the room and corners. The uneven distribution of heat and cold in the room severely reduces the thermal comfort of the activity area. Second, the induction and heat exchange performance is limited. The nozzles on both sides spray in a single direction, the secondary air extraction coverage is narrow, and the mixing of primary and secondary air is insufficient. At the same time, the effective contact area between the traditional flat heat exchange coil and the air is limited, resulting in low heat exchange efficiency. The overall cooling capacity of the equipment is difficult to meet the needs of high-load use. Third, the space installation adaptability is weak. The dual-sided air supply structure is only suitable for rectangular long spaces and must be arranged along the long side of the room. The air supply effect is greatly reduced in square, round, and small irregularly shaped cabins, and it cannot be adapted to diverse small and enclosed spaces such as cruise ship cabins.

[0004] Therefore, the present invention provides a circumferentially uniform air supply active cold beam end device with annular array nozzles to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose a circumferentially uniform air supply active cooling beam end device with annular array nozzles, which solves the technical problems of uneven airflow distribution in existing two-sided air supply active cooling beams, which easily form temperature dead zones and have poor adaptability for installation in irregular spaces.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution: This invention provides a circumferentially uniform airflow active cooling beam end device with annular array nozzles, comprising: The static pressure box has a fresh air inlet on its side wall and a ring array of nozzles at one end. The end housing is coaxially and sealed to the lower end of the static pressure box; A deflector plate, built into the end housing, and forming an annular air outlet with the end housing, the annular air outlet being connected to the nozzle; and An induction panel is installed on the side of the guide plate away from the nozzle, and the induction panel is evenly provided with a plurality of induction through holes, which are connected to the annular air outlet.

[0007] In some embodiments, a spiral heat exchange coil is coaxially disposed above the induction panel, and chilled water flows through the inside of the heat exchange coil.

[0008] In some embodiments, the heat exchange coil is configured as a multi-layered, spaced copper tube with aluminum fins.

[0009] In some embodiments, the static pressure box is configured as a hollow sealed cylindrical structure, made of galvanized steel plate or aluminum alloy, and the inner wall of the static pressure box is lined with sound-absorbing cotton.

[0010] In some embodiments, the nozzle is arranged at the outer edge of the lower end of the static pressure chamber, and the axis of the nozzle is inclined downward at an angle of 15° to 45° with the axis of the static pressure chamber.

[0011] In some embodiments, the end housing includes a cylindrical tube and an inverted conical tube, the upper end of the cylindrical tube being coaxially and sealed to the lower end of the static pressure box, and the inverted conical tube being integrally connected to the lower end of the cylindrical tube.

[0012] In some embodiments, the cone angle of the inverted cone is set to 120°~150°.

[0013] In some embodiments, the distance between the guide plate and the end housing is set to 60~100mm, and the upper end of the guide plate is spaced apart from the static pressure box, and the edges of the guide plate and the end housing are provided with arc structures.

[0014] In some embodiments, the fresh air inlet is connected to an air inlet pipe, and the diameter of the air inlet pipe is set to DN100~DN150.

[0015] In some embodiments, the thickness of the guiding panel is set to 2-3 mm, the diameter of the guiding through hole is set to 5-8 mm, and the hole spacing is set to 15-20 mm.

[0016] Compared with the prior art, the beneficial effects of the present invention are: This invention's end-of-line device for cold beams employs a simple structure combining a cylindrical static pressure box with an annular array of inclined nozzles at the bottom, a spiral heat exchange coil, and an inverted conical outer shell with an annular air outlet. Relying on a 360° circumferential radial jet to form a continuous and complete annular negative pressure zone within the device, it can draw in secondary air from the room over a wide area and uniformly. Compared to traditional double-sided fixed-point air-supply cold beams, the coverage area for secondary air induction is significantly expanded. The spiral copper tube and aluminum fin heat exchange coil, arranged above the induction panel, extends the heat exchange contact path between the secondary air and the low-temperature chilled water, effectively increasing the effective heat exchange area and simultaneously improving air induction efficiency and heat exchange performance. This significantly improves indoor temperature uniformity and greatly enhances the overall cooling capacity of the device. It overcomes the core defects of traditional double-sided air-supply cold beams, such as dead airflow corners, uneven heat distribution, and insufficient coil heat exchange capacity. It significantly optimizes the thermal comfort experience in indoor activity areas, provides stronger load matching capability for the air conditioning system under the same operating conditions, and is more energy-efficient in long-term operation.

[0017] This device features a coaxial, integrated circular design, allowing for installation regardless of room layout. It can be centrally suspended in various irregularly shaped enclosed spaces, including square, circular, and polygonal areas, making it particularly suitable for small cruise ship cabins and irregularly shaped hotel rooms. This maximizes ceiling space utilization and provides flexible and convenient on-site installation. The device also incorporates a multi-layered noise reduction structure. Sound-absorbing cotton is applied to the inner wall of the plenum chamber to pre-attenuate turbulent airflow noise. Several distributed small-diameter nozzles distribute the total airflow, reducing aerodynamic noise generated by single high-speed airflows. The annular air outlet and guide plate all feature rounded transitions to eliminate regenerated noise from right-angle airflow changes. These multiple methods work together to effectively reduce operating noise. This invention combines superior airflow performance, spatial adaptability, and quiet operation, making it suitable for a wide range of applications, including cruise ship cabins, high-end hotel rooms, and office buildings—enclosed spaces with stringent requirements for thermal comfort and quiet operation. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural schematic diagram of the active cooling beam end device with circumferential uniform air supply and ring array nozzles of the present invention. Figure 2 This is a front sectional view of the active cooling beam end device with circumferential uniform air supply and annular array nozzles of the present invention. Figure 3 This is a schematic diagram of the disassembled structure of the active cooling beam end device with annular array nozzles for circumferential uniform air supply according to the present invention. Explanation of reference numerals in the attached figures: 100. Static pressure box; 110. Fresh air inlet; 120. Nozzle; 130. Air inlet duct; 200. Terminal housing; 210. Cylindrical tube; 220. Inverted cone; 300. Guide plate; 400. Annular air outlet; 500. Induction panel; 510. Induction through hole; 600. Heat exchange coil. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0020] To address the technical problems of uneven airflow distribution, low induced heat transfer efficiency, poor adaptability to irregularly shaped spaces, and high aerodynamic noise in existing active cooling beams with side-blown air supply, this invention provides a circumferentially uniform air supply active cooling beam end device with annular array nozzles. It can achieve 360° circumferential uniform air supply, can be universally installed in square, circular, and polygonal spaces, and operates with low noise and stability.

[0021] It should be noted that the circumferentially uniformly air-dissipating active cold beam terminal device with annular array nozzles described in this invention is used for, but not limited to, ventilation and air conditioning terminal equipment such as cruise ship cabin air conditioning, office building air conditioning, hotel room air conditioning, and high-precision constant temperature and comfort spaces. For ease of explanation, this invention only uses the application of the cold beam terminal device in a small enclosed cabin of a cruise ship as an example. The principle of the cold beam terminal device applied to other types of air conditioning and ventilation scenarios is essentially the same as that applied to cruise ship cabins, and will not be elaborated here.

[0022] Please see Figures 1 to 3This is a schematic diagram of the structure of a circumferentially uniformly air-supplying active cold beam end device with annular array nozzles in one embodiment of the present invention. The cold beam end device has a coaxial circular structure and is equipped with four core components in a coaxial sequence from top to bottom: static pressure box 100, end shell 200, guide plate 300, and induction panel 500. A fresh air inlet 110 is opened on the side wall of the static pressure box 100. Several nozzles 120 are arranged in an annular array on the outer edge of the lower end face of the static pressure box 100. The end shell 200 is coaxially sealed and connected to the lower end of the static pressure box 100. The guide plate 300 is arranged in parallel and suspended in the internal cavity of the end shell 200. The outer wall of the guide plate 300 and the inner wall of the end shell 200 are spaced apart, and the two together form an annular air outlet 400. The annular air outlet 400 is located below the nozzles 120 and is connected to the nozzles 120. The induction panel 500 is installed on the side of the guide plate 300 away from the nozzles 120 through a flange seal. Several induction through holes 510 are evenly opened on the surface of the induction panel 500. The induction through holes 510 are connected upward to the inner cavity of the guide plate 300. The cavity is interconnected with the upper end of the annular air outlet 400, thereby forming a complete continuous airflow path of primary air injection, secondary air induction, hot and cold air mixing, and full-area air outlet.

[0023] This device features a coaxial, circular, integrated design, making it suitable for various small, enclosed spaces, including square, circular, and polygonal ones, regardless of the room's shape. It is particularly well-suited for cruise ship cabins and irregularly shaped hotel rooms. The device integrates multiple noise reduction structures, employing distributed small-diameter nozzles, sound-absorbing cotton on the inner wall of the static pressure chamber, and a circular air outlet with a rounded transition to reduce noise. This significantly reduces the overall aerodynamic noise, meeting the stringent requirements for indoor quietness in applications such as ship cabins and high-end hotels. The device offers flexible installation and layout, maximizing the utilization of ceiling space.

[0024] In one embodiment, please refer to Figure 2 , Figure 3 A spiral heat exchange coil 600 is coaxially fixed at the center of the upper part of the induction panel 500. The heat exchange coil 600 is laid flat above the induction panel 500, completely covering the air intake area above the induction through-hole 510. The heat exchange coil 600 adopts a multi-layered copper tube and aluminum fin structure. The two ends of the heat exchange coil 600 are connected to the chilled water supply and return pipes, respectively, and can continuously supply 7~12℃ low-temperature chilled water during operation. After the high-temperature secondary air in the room is drawn upward through the induction through-hole 510, it must completely pass through the multi-layered spiral heat exchange coil 600, effectively extending the contact path between the air and the heat exchange tube wall, and fully completing the forced convection cooling. The spiral layout matches the circular equipment body, eliminating heat exchange blind spots and improving heat exchange efficiency.

[0025] In one embodiment, please refer to Figure 2The plenum chamber 100 is a sealed, hollow cylindrical cavity, preferably with a diameter of 800-1200 mm and a height of 100-200 mm. It is integrally welded from galvanized steel or aluminum alloy sheet, and the entire inner surface of the cavity is fully lined with sound-absorbing cotton. At the bottom outer edge of the plenum chamber 100, 36-72 miniature nozzles 120 are evenly arranged in a ring. The nozzle diameter is 2-4 mm, and the axes of all nozzles 120 are radially inclined downwards at 15°-45° relative to the central axis of the plenum chamber, forming a 360° circumferential radial jet. After fresh air enters the plenum chamber 100 through the fresh air inlet 110, it is fully stabilized and evenly distributed within the large-volume cylindrical cavity. The sound-absorbing cotton on the inner wall absorbs turbulent airflow noise, and the distributed small-diameter nozzles distribute the total airflow, preventing high-intensity aerodynamic noise generated by a single high-speed airflow.

[0026] In one embodiment, please refer to Figure 1 The end shell 200 is integrally formed by splicing an upper cylindrical cylinder 210 and a lower inverted conical cylinder 220. The upper end face of the cylindrical cylinder 210 is sealed to the bottom of the static pressure box 100, and the height of the cylindrical cylinder 210 is 300~600mm. The inverted conical cylinder 220 is seamlessly connected to the lower end of the cylindrical cylinder 210, and the cone angle of the inverted conical cylinder 220 is controlled between 120° and 150°, with a cylinder height of 200~400mm. The entire inner wall of the end shell 200 is polished smooth to reduce the frictional resistance when the mixed airflow flows along the wall. The composite shape of the upper cylindrical and lower inverted conical cylinder can receive the radial primary jet from above and guide the airflow to converge evenly in the bottom annular area, preventing the airflow from deflecting or vortexing inside the shell.

[0027] In one embodiment, please refer to Figure 2 , Figure 3 The guide plate 300 is provided with an annular cylinder and an annular cone parallel to the end shell 200. The annular cylinder and annular cone are suspended parallel to each other inside the end shell 200, and the distance between the outer wall of the guide plate 300 and the inner wall of the end shell 200 is 60~100mm. This distance is the effective air outlet width of the annular air outlet 400. The upper end of the annular cylinder of the guide plate 300 and the bottom of the static pressure box 100 are reserved for ventilation. The upper and lower edges of the guide plate 300 and the bottom edge of the end shell 200 are all rounded. The rounded structure eliminates the regenerated noise caused by the right angle turn of the airflow. The equal width annular channel ensures that the mixed airflow has a consistent circumferential velocity along 360°, and eliminates the problems of excessive local wind speed and uneven air supply.

[0028] In one embodiment, please refer to Figure 1 , Figure 3The fresh air inlet 110 on the side wall of the static pressure box 100 is connected to a rigid air inlet pipe 130. The air inlet pipe 130 is uniformly selected with a standard pipe diameter of DN100~DN150. The far end of the air inlet pipe 130 is connected to the central air conditioning fresh air handling unit, which is specially used to transport low-temperature primary fresh air after cooling and dehumidification pretreatment. A sealing flange gasket is installed at the connection between the pipe and the fresh air inlet 110 to prevent primary fresh air from leaking into the equipment interlayer, ensuring stable air pressure inside the static pressure box 100, and ensuring that the air volume of all nozzles 120 is uniform.

[0029] In one embodiment, please refer to Figure 1 , Figure 3 The induction panel 500 is a circular flat plate component with a plate thickness controlled at 2-3mm. The plate surface is covered with induction through holes 510. The diameter of the induction through holes 510 is 5-8mm, and the center-to-center distance between adjacent holes is 15-20mm. All induction through holes 510 are arranged in an orthogonal matrix evenly. The dense and evenly distributed small holes can draw in indoor hot air over a large area, avoid local differences in secondary air intake, ensure balanced airflow throughout the heat exchange coil 600, and simultaneously improve the overall induced air volume and heat exchange stability.

[0030] To better understand this invention, the following is combined with... Figures 1 to 3 The technical solution of the present invention is described in detail as follows: When the circumferentially uniformly supplied active cooling beam end device with annular array nozzles of the present invention is in operation, the primary fresh air after cooling and dehumidification treatment is sequentially sent into the static pressure box 100 through the air inlet pipe 130 and the fresh air inlet 110 to complete pressure stabilization and noise reduction; then the fresh air is ejected downward at high speed from the nozzles 120 inclined at the bottom of the static pressure box 100, forming an annular negative pressure zone around the center in the inner cavity of the guide plate 300; the indoor high-temperature secondary air is drawn in by the negative pressure and passes through the induction panel The induced air enters the equipment from various through-holes 510 at various locations and flows upward through the multi-layer spiral heat exchange coils 600 to complete pre-cooling. The cooled secondary air continues to flow upward and mixes thoroughly with the primary cold air sprayed downward by the nozzles 120 in the inner cavity of the guide plate 300 to form a uniformly temperature-mixed low-temperature airflow. The mixed airflow flows downward along the inner wall of the inverted cone 220, and after being rectified and regulated by the guide plate 300, it is evenly delivered into the room in a 360° circumferential direction along the full-circumference air outlet 400, completely covering the area where people are active in the room.

[0031] The entire set of cold beam terminal equipment is suspended and fixed inside the indoor ceiling by a matching top-mounted hoisting component. The hoisting component adopts an adjustable screw structure, which can flexibly adjust the installation height of the equipment according to the ceiling elevation to ensure that the device is arranged horizontally and coaxially, avoiding imbalance of circumferential air volume at the annular air outlet due to tilting. The fresh air inlet on the side wall of the static pressure box is sealed and connected to the central air conditioning supply air duct, delivering low-temperature primary fresh air that has undergone cooling and dehumidification pretreatment. The spiral heat exchange coils arranged above the induction panel have their inlet and outlet connected to the chilled water supply and return pipes, respectively. The pipeline is equipped with ball valves and flexible vibration damping accessories, which not only facilitates later maintenance and adjustment of chilled water flow, but also prevents water pump vibration from being transmitted to the cold beam body, further reducing equipment operating vibration noise. The entire piping system is laid out independently in different zones. The primary air and fresh air ducts, chilled water ducts, and indoor secondary air circulation chambers are completely separated. With full-point sealing protection, it can stably achieve the core functions of 360° circumferential uniform air supply, efficient heat exchange, and low-noise operation. It is suitable for long-term stable use in various indoor spaces such as cruise ship cabins, hotel rooms, and offices.

[0032] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A circumferentially uniform air supply active cold beam end device with an annular array of nozzles, characterized in that, include: The static pressure box has a fresh air inlet on its side wall and a ring array of nozzles at one end. The end housing is coaxially and sealed to the lower end of the static pressure box; A deflector plate, built into the end housing, and forming an annular air outlet with the end housing, the annular air outlet being connected to the nozzle; and An induction panel is installed on the side of the guide plate away from the nozzle, and the induction panel is evenly provided with a plurality of induction through holes, which are connected to the annular air outlet.

2. The circumferentially uniform air supply active cold beam tip device with ring array nozzles of claim 1, wherein, A spiral heat exchange coil is coaxially arranged above the induction panel, and chilled water flows through the inside of the heat exchange coil.

3. The circumferentially uniform air supply active cold beam tip device with ring array nozzles of claim 2, wherein, The heat exchange coil is configured as a multi-layered, spaced copper tube with aluminum fins.

4. The circumferentially uniform air supply active cooling beam end device with annular array nozzles according to claim 1, characterized in that, The static pressure box is configured as a hollow sealed cylindrical structure, made of galvanized steel plate or aluminum alloy, and the inner wall of the static pressure box is lined with sound-absorbing cotton.

5. The circumferentially uniform air supply active cold beam tip device with ring array nozzles of claim 1, wherein, The nozzle is located at the outer edge of the lower end of the static pressure box, and the axis of the nozzle is inclined downward at an angle of 15° to 45° with the axis of the static pressure box.

6. The circumferentially uniform air supply active cold beam tip device with ring array nozzles of claim 1, wherein, The end housing includes a cylindrical tube and an inverted conical tube. The upper end of the cylindrical tube is coaxially and sealed to the lower end of the static pressure box, and the inverted conical tube is integrally connected to the lower end of the cylindrical tube.

7. The circumferentially uniform air supply active cold beam tip with ring array nozzles of claim 6, wherein, The cone angle of the inverted cone is set to 120°~150°.

8. The circumferentially uniform air supply active cold beam tip device with ring array nozzles of claim 1, wherein, The distance between the guide plate and the end housing is set to 60~100mm, and the upper end of the guide plate is spaced apart from the static pressure box. The edges of the guide plate and the end housing are provided with arc structures.

9. The circumferentially uniform air supply active cold beam tip device with ring array nozzles of claim 1, wherein, The fresh air inlet is connected to an air inlet pipe, and the diameter of the air inlet pipe is set to DN100~DN150.

10. The circumferentially uniform air supply active cold beam tip device with ring array nozzles of claim 1, wherein, The thickness of the guiding panel is set to 2-3 mm, the diameter of the guiding through hole is set to 5-8 mm, and the hole spacing is set to 15-20 mm.

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