Chilled beam structure and chilled beam air conditioning system

Abstract

The present invention provides a chilled beam structure and a chilled beam air conditioning system. The chilled beam structure includes a static pressure chamber, a heat exchanger and a nozzle. The chilled beam structure has a partition shielding the static pressure chamber from below. The nozzle is connected to the partition downward, the nozzle is connected to the static pressure chamber, and the heat exchanger is arranged below the partition. An air flow channel is formed between the heat exchanger and the partition, and the air flow channel extends along a first horizontal direction. An air outlet channel is formed between the two heat exchangers, the air outlet channel is located below the nozzle, and the air outlet channel is vertically connected. The air flow channel is connected to the air outlet channel at the location of the nozzle. The chilled beam air conditioning system includes a chilled beam structure. Indoor air enters the air flow channel from the heat exchanger to become secondary air, and after mixing with the primary air sent out by the nozzle under the Venturi effect, it passes through the air outlet channel with a shorter stroke to become a stronger downward jet flow, which is sufficient to reach the bottom of the space, so that the chilled beam structure is suitable for tall and large spaces.

Description

Technical Field

[0001] The invention relates to the technical field of air conditioning equipment, and in particular to a chilled beam structure and a chilled beam air conditioning system. Background Art

[0002] An active chilled beam and a chilled beam air-conditioning system are disclosed in a Chinese invention patent application with application number CN201711260128.1. The active chilled beam comprises a shell, the upper part of which is a static pressure chamber, an air inlet is arranged at the bottom of the shell, and a heat exchange tube coil is arranged at the outlet of the air inlet; air outlets are arranged on both sides of the air inlet, the static pressure chamber has a nozzle facing the air outlet, an air outlet duct connected to the air outlet is arranged in the shell, and a rotatable air guide wing is arranged at the air outlet.

[0003] The problem with the existing active chilled beams is that the airflow organization in the chilled beam structure mainly relies on the air guide wing plates to achieve attached air supply, the air supply flow rate is hindered, and the air supply demand of large spaces cannot be met. Summary of the invention

[0004] The first object of the present invention is to provide a chilled beam structure suitable for tall and large spaces.

[0005] A second object of the present invention is to provide a chilled beam air conditioning system suitable for large spaces.

[0006] The first purpose of the present invention provides a cold beam structure including a heat exchanger, a nozzle and a partition. A static pressure chamber is formed inside the cold beam structure. The partition blocks the static pressure chamber from below. The nozzle is connected to the lower surface of the partition and the nozzle is connected to the static pressure chamber. The heat exchanger is arranged below the partition. An air flow channel is formed between the heat exchanger and the partition, and the air flow channel extends along a first horizontal direction. An air outlet channel is formed between the two heat exchangers, and the air outlet channel is located below the nozzle. The air outlet channel runs through vertically. The air flow channel is connected to the air outlet channel at the location of the nozzle.

[0007] It can be seen from the above scheme that the indoor air enters the air flow channel from the heat exchanger to become secondary air, and after mixing with the primary air delivered by the nozzle under the Venturi effect, it passes through the air outlet channel with a shorter stroke to become a stronger downward jet flow, which is sufficient to reach the bottom of the space, making the chilled beam structure suitable for tall spaces.

[0008] A further solution is that the airflow channel extends between the distal end and the proximal end along the first horizontal direction, the distal end is farther away from the nozzle than the proximal end; and the spacing between the partition and the heat exchanger gradually increases from the distal end to the proximal end.

[0009] It can be seen from the above that the cross-sectional area of ​​the air flow channel formed by the inclined rising partition and the horizontal heat exchanger is getting larger and larger, which matches the gradually increasing indoor return air volume in the negative pressure area formed on one side of the nozzle, ensuring the recovery and mixing amount of the secondary air.

[0010] A further solution is that the level of the partition gradually increases from the far end to the near end.

[0011] As can be seen from the above, the partitions are symmetrically arranged, and the partitions are inclined upward toward the middle where the nozzle is located, so the nozzle is closer to the top of the static pressure box chamber, so the overall height of the chilled beam structure can be reduced, and the thickness of the chilled beam structure can be effectively reduced.

[0012] A further solution is that the partition extends along an arc between the distal end and the proximal end.

[0013] As can be seen from the above, this setting improves the smoothness of airflow.

[0014] A further solution is that the nozzle has a circular spray port; the plurality of nozzles are arranged along a second horizontal direction, and the second horizontal direction is perpendicular to the first horizontal direction.

[0015] Another further solution is that the nozzle has a slit-shaped spray port; the spray port extends along a second horizontal direction, and the second horizontal direction is perpendicular to the first horizontal direction.

[0016] It can be seen from the above that both nozzle settings can effectively achieve downward spraying of airflow, while the slit nozzle is more continuous and the mixing between the primary air and the secondary air is more complete.

[0017] A further solution is that each heat exchanger is provided with an air guide plate, and an air outlet channel is formed between two air guide plates.

[0018] As can be seen from the above, the provision of the wind guide plate makes the wind direction of the delivered air more stable.

[0019] A further solution is that the distance between the two air guide plates gradually decreases from bottom to top.

[0020] As can be seen from the above, this setting can slightly expand the range of wind directions when facing the air outlet, thereby improving comfort.

[0021] A further solution is that the air guide plate has a guide surface facing the air outlet channel, and the guide surface is a curved surface.

[0022] As can be seen from the above, this setting improves the smoothness of air flow and the stability of wind direction.

[0023] A further solution is to provide thermal insulation cotton on the outer surface of the static pressure chamber.

[0024] As can be seen from the above, this setting can prevent condensation from forming on the outer surface of the chilled beam.

[0025] The second object of the present invention is to provide a chilled beam air conditioning system comprising a chilled beam structure, and the chilled beam structure adopts the above-mentioned chilled beam structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1It is a structural schematic diagram of the first embodiment of the chilled beam structure of the present invention.

[0027] Figure 2 This is a working principle diagram of the first embodiment of the chilled beam structure of the present invention.

[0028] Figure 3 It is a structural schematic diagram of the second embodiment of the chilled beam structure of the present invention.

[0029] Figure 4 It is a structural schematic diagram of the third embodiment of the chilled beam structure of the present invention. DETAILED DESCRIPTION

[0030] Chilled beam structure first embodiment

[0031] See also Figure 1 , Figure 1 It is a schematic structural diagram of a cross section of the first embodiment of the chilled beam structure of the present invention in the extension direction. In the spatial coordinate system established in the figure, the x-axis direction is the width direction of the chilled beam structure (the first horizontal direction), the y-axis direction is the length direction of the chilled beam structure (the second horizontal direction), and the z-axis direction is the height direction (vertical). The chilled beam air-conditioning system provided by the present invention has a chilled beam structure installed on the top wall of the floor, and the top of the chilled beam structure has an access duct 11 connected to the air conditioner, and the access duct 11 is used to receive primary air. Below the access duct 11 is a static pressure chamber 12, and thermal insulation cotton is arranged on the outer surface of the static pressure chamber 12; the access duct 11 is connected to the static pressure chamber 12; a partition 17 is arranged in the middle of the height direction of the chilled beam structure, and the partition 17 extends between the side walls on both sides of the width direction of the chilled beam structure, and the partition 17 seals and blocks the static pressure chamber 12 from the bottom of the static pressure chamber 12.

[0032] A nozzle 13 is installed on the lower surface of the partition 17. The nozzle 13 is a conical nozzle with a circular spray port facing in the direction. A plurality of nozzles 13 are arranged along the length direction of the chilled beam structure, and the nozzles 13 are connected to the static pressure chamber 12. In the width direction, the partition 17 is symmetrically arranged on both sides of the nozzle 13 with the nozzle 13 as the center; the horizontal height of the partition 17 gradually increases from the extension end 171 to the extension middle part 172 close to the nozzle 13, and the nozzle 13 is connected to the highest horizontal position on the partition 17.

[0033] The cold beam structure also includes a heat exchanger 14 located below the partition 17. The two horizontally arranged heat exchangers 14 are symmetrically arranged with the nozzle 13 as the center. The heat exchanger 14 has a pipe group connected to the air conditioning water system, and the heat exchanger 14 is penetrated on both sides in the thickness direction for airflow to pass through. The heat exchanger 14 is installed with an air guide plate 141 at the extended end close to the nozzle 13 in the width direction, and the distance between the two air guide plates 141 gradually decreases from bottom to top. An air outlet channel 16 is formed between the two air guide plates 141 and penetrates in the height direction. The air guide plate 141 has a guide surface facing the air outlet channel 16, and the guide surface is a curved surface.

[0034] The lower end of the nozzle 13 is at the same horizontal position as the air inlet at the upper end of the air outlet channel 16 . At the air inlet at the upper end of the air outlet channel 16 , an airflow gap 161 is formed between the nozzle 13 and the air guide plate 141 .

[0035] In the height direction, the chilled beam structure forms an airflow channel 15 extending in the width direction and in the length direction between the partition 17 and the heat exchanger 14. The airflow channel extends between the distal end and the proximal end in the width direction, and the distal end is farther away from the nozzle 13 than the proximal end. Due to the inclined setting of the partition 17, the distance between the partition 17 and the heat exchanger 14 gradually increases from the distal end to the proximal end. The airflow channel 15 is connected to the air outlet channel 16 through the airflow gap 161.

[0036] Combination Figure 1 and Figure 2 , Figure 2 This is a working principle diagram of the first embodiment of the chilled beam structure of the present invention. Assuming that the indoor air needs to be ventilated and cooled, the air conditioner will allow the cold primary air to enter the static pressure chamber 12 through the access air duct 11, and then be ejected from the nozzle 13 toward the air outlet channel 16 located directly below the nozzle 13. Under the Venturi effect, while the nozzle 13 is ejecting the primary air, a negative pressure area 151 is generated on the periphery of the nozzle 13, thereby forcing the secondary air in the room to pass through the heat exchanger 14 into the air flow channel 17 and flow toward the negative pressure area 151. Since there is flowing cold liquid in the pipe group of the heat exchanger 14, the secondary air is cooled and regulated, and finally the cold primary air and the cooled secondary air are mixed in the air outlet channel 16 and sent to the room. The cold beam structure provided by the present invention has high heat exchange efficiency, and the vertically downwardly sprayed supply air can reach the bottom of a tall and large space, so the cold beam structure provided by the present invention is effectively applicable to tall and large spaces; in addition, the inclined design of the partition 17 improves the horizontal position of the nozzle 13 in the cold beam structure, and the overall thickness of the cold beam structure 17 is smaller, and the installation adaptability and appearance aesthetics are improved.

[0037] Second embodiment of the chilled beam structure

[0038] See also Figure 3 , Figure 3Schematic diagram of the structure of the second embodiment of the chilled beam structure of the present invention. In this embodiment, the partition 27 blocking the static pressure chamber 22 and the air flow channel 25 extends horizontally, and the cross-sectional area of ​​the air flow channel 25 in the width direction is equal at all places.

[0039] The third embodiment of the chilled beam structure

[0040] See also Figure 4 , Figure 4 Schematic diagram of the structure of the third embodiment of the chilled beam structure of the present invention. In this embodiment, the partition 27 blocking the static pressure chamber 32 and the air flow channel 35 extends horizontally, and the condenser 34 is inclined in the width direction, and the horizontal position of the condenser 34 gradually decreases from the first end extending away from the nozzle 33 to the second end extending close to the nozzle 33.

[0041] In other embodiments, the nozzle has a slit-shaped spray outlet, and the spray outlet extends along the length direction of the chilled beam structure.

[0042] Finally, it should be emphasized that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A chilled beam structure, comprising a heat exchanger, a nozzle and a partition, wherein a static pressure chamber is formed inside the chilled beam structure, the partition shields the static pressure chamber from below, the nozzle is connected to the lower surface of the partition and the nozzle is in communication with the static pressure chamber, and the heat exchanger is arranged below the partition; Features: An air flow channel is formed between the heat exchanger and the partition, the air flow channel extends along a first horizontal direction, and the secondary air in the room passes through the heat exchanger and enters the air flow channel; An air outlet channel is formed between the two heat exchangers, the air outlet channel is located below the nozzle, the air outlet channel is vertically connected, an air guide plate is provided on each heat exchanger, and the air outlet channel is formed between the two air guide plates; The airflow channel is connected to the air outlet channel at the location of the nozzle, the lower end of the nozzle is at the same horizontal position as the air inlet at the upper end of the air outlet channel, and an airflow gap is formed between the nozzle and the air guide plate at the air inlet at the upper end of the air outlet channel, and the airflow channel is connected to the air outlet channel through the airflow gap.

2. The chilled beam structure according to claim 1, characterized in that: The air flow channel extends between a distal end and a proximal end along the first horizontal direction, and the distal end is farther away from the nozzle than the proximal end; The distance between the partition plate and the heat exchanger gradually increases from the distal end to the proximal end.

3. The chilled beam structure according to claim 2, characterized in that: The level of the partition gradually increases from the distal end to the proximal end.

4. The chilled beam structure according to claim 2, characterized in that: The partition extends along an arc between the distal end and the proximal end.

5. The chilled beam structure according to any one of claims 1 to 3, characterized in that: The nozzle has a circular spray outlet; The plurality of nozzles are arranged along a second horizontal direction, and the second horizontal direction is perpendicular to the first horizontal direction.

6. The chilled beam structure according to any one of claims 1 to 3, characterized in that: The nozzle has a slit-shaped spray outlet; The ejection port extends along a second horizontal direction, and the second horizontal direction is perpendicular to the first horizontal direction.

7. The chilled beam structure according to any one of claims 1 to 3, characterized in that: The distance between the two air guide plates gradually decreases from bottom to top.

8. The chilled beam structure according to any one of claims 1 to 3, characterized in that: The air guide plate has a guide surface facing the air outlet channel, and the guide surface is a curved surface.

9. The chilled beam structure according to any one of claims 1 to 3, characterized in that: The outer surface of the static pressure chamber is provided with heat insulation cotton.

10. A chilled beam air conditioning system, comprising a chilled beam structure, characterized in that: The chilled beam structure adopts the chilled beam structure according to any one of claims 1 to 9 above.

Images