A dry-coil structure

Abstract

This utility model relates to the field of air conditioning component manufacturing technology, specifically to a dry coil structure, including a first fixed frame, the top plane of which provides a pressure contact surface for fasteners, a first thermally conductive connection layer made of a high thermal conductivity alloy material to quickly guide heat from the air inlet side to the core heat transfer zone, a corrugated surface structure to increase the heat exchange area, and corrugated fins fixed to the surface of the thermally conductive connection layer by a high-frequency welding process to form a turbulence-enhanced heat exchange surface, thereby breaking the air boundary layer and improving heat exchange efficiency. The thermally conductive base layer, as the core heat transfer medium, is formed by continuous stretching of a single aluminum plate to achieve efficient axial heat conduction between the air inlet and return sides. This device constructs a bidirectional heat transfer channel through the thermally conductive connection layer and the corrugated fins, achieving efficient exchange of hot and cold energy without mixing air. The heat of the high-temperature airflow in the air inlet duct is quickly conducted to the return air duct side by the thermally conductive base layer, while the coldness of the low-temperature air in the return air duct is transferred back to the air inlet side.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning component manufacturing technology, and in particular to a dry coil structure. Background Technology

[0002] In modern central air conditioning systems, the dry coil is a core component for energy recovery. Its structure is mainly composed of multi-layer composite heat transfer modules. The heat-conducting base layer, as the core heat transfer medium, is made of high thermal conductivity metal material. The heat-conducting connecting layers arranged symmetrically on both sides expand the heat exchange area through corrugated fins. The entire heat transfer assembly is sealed and fixed in the frame structure. The air inlet pipe and the air return pipe pass through the device through strictly isolated channels. This design ensures that the two airflows can exchange heat without mixing. The locking mechanism composed of fixing ears and fastening bolts maintains the tight contact of the heat transfer assembly, and the sealing ring effectively prevents airflow short-circuit leakage.

[0003] When air conditioning is running in summer, the low-temperature return air exhausted from the room contains a large amount of cooled air. Traditional systems directly exhaust this portion of the cooling capacity to the outside, while the incoming outdoor fresh air is at a high temperature. The air conditioning unit needs to consume additional electricity to cool the fresh air back to the target temperature. This one-way processing mode results in a double waste of energy in both airflows. It loses the residual cooling capacity in the return air and increases the cooling energy consumption of the fresh air. Especially in commercial places that are in continuous operation, this energy loss will result in significant resource waste. Utility Model Content

[0004] The purpose of this invention is to provide a dry coil structure that solves the problems mentioned above.

[0005] To achieve the above objectives, this utility model provides a dry coil structure, including a first fixing frame disposed between the walls of an air inlet pipe and a return air pipe, with a through groove for installing the device provided between the air inlet pipe and the return air pipe. A retaining plate is fixedly disposed at the upper end of the first fixing frame, a first thermally conductive connecting layer is fixedly disposed at the lower end of the first fixing frame, a thermally conductive base layer is fixedly disposed at the lower end of the first thermally conductive connecting layer, a second thermally conductive connecting layer is fixedly disposed at the lower end of the thermally conductive base layer, and a second fixing frame is fixedly disposed at the lower end of the second thermally conductive connecting layer. Several rows of corrugated fins are fixedly disposed at the upper and lower ends of the first and second thermally conductive connecting layers. The first fixing frame serves as the main support frame. It bears the mechanical load-bearing function of the entire structure. Its internal cavity provides installation space for heat conduction components. The edge contour matches and connects with the air duct opening. The clamp is made of bent metal sheet and prevents the heat conduction components from moving axially through mechanical limiting. The top plane provides a pressure contact surface for fasteners. The first heat conduction connection layer uses a high thermal conductivity alloy material to quickly guide the heat from the air inlet side to the core heat transfer area. The surface corrugated structure increases the heat exchange area. The corrugated fins are fixed to the surface of the heat conduction connection layer through high frequency welding process to form a turbulence-enhanced heat exchange surface, which breaks the air boundary layer and improves heat exchange efficiency. The heat conduction base layer, as the core heat transfer medium, is made of a single piece of aluminum sheet that is continuously stretched to achieve efficient axial heat conduction between the air inlet and return sides.

[0006] The first thermally conductive connecting layer and the thermally conductive base layer are fixedly provided with fixing ears at both ends. The fixing ears serve as lateral positioning components and have standard threaded holes, forming a detachable connection structure with the outer frame.

[0007] The fixing ear has a first screw hole, and fixing end blocks are fixedly installed at the left and right ends of the fixing ear. The fixing end blocks have grooves inside to form a complementary interlocking structure with the fixing ear, which disperses the shear stress at the connection.

[0008] The fixed end block has a slot at one end near the fixed ear, and a first fastening bolt is fixedly installed at the upper end of the fixed end block. The slot is CNC milled to form a transition fit with the contour of the fixed ear, thus restricting the horizontal degree of freedom.

[0009] The second thermally conductive connection layer has several second screw holes, and the upper end of the first fixing frame is fixedly provided with a second fastening bolt.

[0010] A sealing ring is fixedly installed between the first fixed frame and the second fixed frame. The sealing ring has several through holes and is made of silicone rubber material. It fills the assembly gap between the frame and the air duct to prevent air leakage.

[0011] This device constructs a bidirectional heat transfer channel through a thermally conductive connecting layer and corrugated fins, achieving efficient exchange of hot and cold energy without mixing with the air. The heat from the high-temperature airflow in the inlet duct is rapidly conducted to the return air duct side by the thermally conductive base layer, while the cold air from the low-temperature air in the return air duct is transferred back to the inlet side. This cross-heat exchange mode significantly reduces the cooling load of the air conditioning system on the fresh air. The multi-row staggered layout of the corrugated fins greatly increases the effective heat exchange area. The sealing ring ensures complete isolation between the two airflows to avoid energy loss. The combination structure of the fixed frame and fastening bolts allows the device to be adapted to the installation of pipes of different sizes. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0013] Figure 1 This is a schematic diagram of the overall structure of the dry coil structure according to an embodiment of the present utility model.

[0014] Figure 2 This is an exploded view of the dry coil structure according to an embodiment of the present invention.

[0015] Figure 3 This is a schematic diagram of the heat exchange plate structure according to an embodiment of the present invention.

[0016] Figure 4 This is a schematic diagram of the fixed end block structure according to an embodiment of the present invention.

[0017] Figure 5 This is a schematic diagram of the dry coil structure installation according to an embodiment of the present utility model.

[0018] 1. First fixing frame, 2. Clamping plate, 3. First thermally conductive connecting layer, 4. Thermally conductive base layer, 5. Second thermally conductive connecting layer, 6. Corrugated fins, 7. Fixing lug, 8. First screw hole, 9. Fixing end block, 10. Groove, 11. First fastening bolt, 12. Second fixing frame, 13. Second screw hole, 14. Second fastening bolt, 15. Sealing ring, 16. Through hole, 17. Air inlet pipe, 18. Air return pipe. Detailed Implementation

[0019] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0020] Please see Figures 1-5A dry coil structure includes a first fixing frame 1, which is disposed between the walls of an air inlet pipe 17 and a return air pipe 18. A through groove for installing the device is provided between the air inlet pipe 17 and the return air pipe 18. A clamping plate 2 is fixedly disposed at the upper end of the first fixing frame 1. A first thermally conductive connecting layer 3 is fixedly disposed at the lower end of the first fixing frame 1. A thermally conductive base layer 4 is fixedly disposed at the lower end of the first thermally conductive connecting layer 3. A second thermally conductive connecting layer 5 is fixedly disposed at the lower end of the thermally conductive base layer 4. A second fixing frame 12 is fixedly disposed at the lower end of the second thermally conductive connecting layer 5. The first thermally conductive connecting layer 3 and... Several rows of corrugated fins 6 are fixedly installed at the upper and lower ends of the second thermally conductive connection layer 5. The first fixed frame 1 serves as the installation base of the overall structure and is used to position the device by connecting with the pipe. The second fixed frame 12 works with the first fixed frame 1 to form a stable support frame. The clamping plate 2 is used to restrict the longitudinal movement of the internal thermally conductive components. The first thermally conductive connection layer 3 is responsible for conducting heat from the air inlet pipe side to the center. The thermally conductive base layer 4 serves as the core heat transfer medium to achieve axial heat transfer. The second thermally conductive connection layer 5 completes the final heat transfer to the return air pipe side. The corrugated fins 6 improve heat exchange efficiency by expanding the surface area.

[0021] Please see Figures 1-5 The first thermally conductive connecting layer 3 and the thermally conductive base layer 4 are fixedly provided with fixing ears 7 at their left and right ends. The fixing ears 7 are provided with first screw holes 8. The fixing ears 7 are fixedly provided with fixing end blocks 9 at their left and right ends. The fixing end blocks 9 are provided with slots 10 at the end near the fixing ears 7. The upper end of the fixing end blocks 9 is fixedly provided with first fastening bolts 11. The fixing ears 7 provide lateral fixing support points. The first screw holes 8 are used to insert fasteners. The fixing end blocks 9 and the fixing ears 7 cooperate to form a clamping mechanism. The slots 10 accommodate the fixing ears 7 to achieve precise positioning. The first fastening bolts 11 apply preload to lock the multi-layer structure.

[0022] Please see Figures 1-5 The second heat-conducting connection layer 5 has several second screw holes 13. The upper end of the first fixing frame 1 is fixedly provided with a second fastening bolt 14. A sealing ring 15 is fixedly provided between the first fixing frame 1 and the second fixing frame 12. The sealing ring 15 has several through holes 16. The second screw holes 13 provide auxiliary installation interfaces. The second fastening bolt 14 realizes the final fixation of the frame and the pipe. The sealing ring 15 blocks the direct contact between the two airflows. The through holes 16 balance the sealing pressure and allow thermal expansion. The air inlet pipe 17 delivers fresh air to be treated. The air return pipe 18 carries the return airflow after heat exchange.

[0023] Working principle: The dry coil structure is installed by embedding the first fixing frame 1 and the second fixing frame 12 into the corresponding through slots of the air inlet pipe 17 and the return air pipe 18, respectively. The second fastening bolt 14 passes through the first fixing frame 1 to complete the initial fixation. The clamping plate 2 restricts the longitudinal displacement of the first thermally conductive connecting layer 3, the thermally conductive base layer 4 and the second thermally conductive connecting layer 5 from above. The fixing ear 7 forms a lateral positioning fit with the slot 10 of the fixing end block 9 through its first screw hole 8. After the first fastening bolt 11 is screwed into the fixing end block 9, it presses the fixing ear 7 to achieve the overall locking of the multi-layer structure. The sealing ring 15 fits against the pipe wall through the through hole 16 to ensure airtight isolation. The corrugated fins 6 are welded to the surface of the first thermally conductive connecting layer 3 and the second thermally conductive connecting layer 5 in an alternating arrangement to form a double-sided heat exchange interface. When the high-temperature fresh air flows through the air inlet duct 17, its heat is transferred to the heat-conducting base layer 4 through the first heat-conducting connection layer 3, and then conducted to the corrugated fins 6 on the return air duct 18 side through the second heat-conducting connection layer 5. At the same time, the cold air in the return air duct 18 is transferred to the corrugated fins 6 on the air inlet duct 17 side through the reverse heat transfer path. The second screw hole 13 provides auxiliary installation points to adapt to different pipe diameter requirements. This structure enables efficient heat conduction between the first heat-conducting connection layer 3 and the second heat-conducting connection layer 5 in a completely isolated state between the two pipes. The heat-conducting base layer 4, as a metal core layer, accelerates the axial heat transfer. The nested structure of the fixed end block 9 and the fixed ear 7 eliminates the stress caused by the thermal expansion and contraction of the multi-layer materials, ultimately achieving the dual energy-saving effect of reducing the energy consumption of the pre-cooling of the inlet air while recovering the cold air of the return air.

[0024] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A dry coil structure, comprising a first fixing frame (1), characterized in that, The first fixing frame (1) is disposed between the pipe walls of the air inlet pipe (17) and the air return pipe (18), and a through groove for installing the device is provided between the air inlet pipe (17) and the air return pipe (18). A clamping plate (2) is fixedly disposed at the upper end of the first fixing frame (1), a first thermally conductive connecting layer (3) is fixedly disposed at the lower end of the first fixing frame (1), a thermally conductive base layer (4) is fixedly disposed at the lower end of the first thermally conductive connecting layer (3), a second thermally conductive connecting layer (5) is fixedly disposed at the lower end of the thermally conductive base layer (4), a second fixing frame (12) is fixedly disposed at the lower end of the second thermally conductive connecting layer (5), and several rows of corrugated fins (6) are fixedly disposed at the upper and lower ends of the first thermally conductive connecting layer (3) and the second thermally conductive connecting layer (5).

2. The dry coil structure as described in claim 1, characterized in that, The first thermally conductive connecting layer (3) and the thermally conductive base layer (4) are fixedly provided with fixing ears (7) at their left and right ends.

3. The dry coil structure as described in claim 2, characterized in that, The fixing ear (7) has a first screw hole (8), and fixing end blocks (9) are fixedly installed at the left and right ends of the fixing ear (7).

4. The dry coil structure as described in claim 3, characterized in that, The fixed end block (9) has a slot (10) at one end near the fixed ear (7), and a first fastening bolt (11) is fixedly installed at the upper end of the fixed end block (9).

5. The dry coil structure as described in claim 1, characterized in that, The second thermally conductive connection layer (5) has several second screw holes (13) on its upper surface, and the upper end of the first fixing frame (1) is fixedly provided with a second fastening bolt (14).

6. The dry coil structure as described in claim 1, characterized in that, A sealing ring (15) is fixedly provided between the first fixed frame (1) and the second fixed frame (12), and the sealing ring (15) has several through holes (16).

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