Water receiving structure of closed heat exchanger

Abstract

The utility model relates to the technical field of aircraft ground air conditioners, and discloses a water receiving structure of a closed heat exchanger, a plurality of supporting leg pieces arranged at intervals in the front-back direction and a water receiving disc jointly supported by the supporting leg pieces are arranged on a bottom plate of a shell, the heat exchanger is fixed on the water receiving disc, a first water passing hole is formed in the water receiving disc, and a second water passing hole is formed in the water receiving disc. A water outlet is formed in a bottom plate of the shell, the supporting leg pieces are formed by machining sheet metal, each supporting leg piece comprises a rectangular plate extending transversely and two L-shaped plates which are arranged on the front long edge and the rear long edge of the rectangular plate in a folded mode respectively, and water passing holes are formed in the two L-shaped plates of each supporting leg piece so that condensate water on the bottom plate can penetrate through the water passing holes to flow to the water outlet. According to the water receiving structure, the water receiving plate is jointly supported by the supporting foot pieces of the same structure, the supporting foot pieces are perforated through a numerical control machine tool and formed by machining and bending metal plates, and compared with existing supporting feet of complex structures, the water receiving structure is simple in structure, the machining procedures are reduced, the requirements for the precision and performance of machining equipment are lowered, and the machining cost is lowered. Therefore, the processing period is effectively shortened and the processing cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of aircraft ground air conditioning technology, and in particular to a water receiving structure for a closed heat exchanger. Background Technology

[0002] In aircraft ground air conditioning systems, closed-loop heat exchangers are widely used in heat exchange processes due to their large overall structure. During operation, the heat exchange process between the refrigerant and the outside environment inevitably produces condensate. As fresh air flows from the left to the right side of the heat exchanger, the condensate generated on the heat exchanger drips downwards into a drip tray under gravity. The drip tray is mounted on the base plate of the outer casing using supports. This structure creates a raised platform between the base plate and the drip tray, allowing the condensate to flow through the drain holes in the drip tray into this raised platform and ultimately drain to the drain outlet on the base plate.

[0003] However, considering that the heat exchanger is not only large in size but also heavy, it needs to be firmly fixed on the water receiving pan to ensure its stable operation. At this time, the support legs of the water receiving pan play a key role in raising and supporting the heat exchanger, which requires the support legs to have a large structural strength to meet the load-bearing requirements.

[0004] However, the existing supports used in the water inlet structures of closed heat exchangers are often structurally complex. This complexity leads to numerous difficulties in manufacturing, such as requiring multiple processing steps, demanding high precision and performance from processing equipment, resulting in long processing cycles and high costs. Furthermore, the complex supports present inconveniences during assembly, requiring specialized assembly technicians to spend considerable time on installation and debugging. If any component malfunctions, repair and replacement are extremely troublesome, which to some extent affects the overall production efficiency, reliability, and maintenance convenience of aircraft ground air conditioning systems. Therefore, there is an urgent need to improve the supports in the water inlet structures of closed heat exchangers to overcome these shortcomings of existing technologies. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a water receiving structure for a closed heat exchanger, which aims to solve the technical problems of complex support structure and inconvenient installation.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A water receiving structure for a closed heat exchanger is disclosed. The heat exchanger is housed within a casing. The bottom plate of the casing has multiple support members arranged at intervals along the front and back, and a water receiving tray supported by the multiple support members. The heat exchanger is fixed on the water receiving tray. The water receiving tray has a first water passage hole. A drain outlet is provided on the bottom plate of the casing. The support members are made of sheet metal. Each support member includes a laterally extending rectangular plate and two L-shaped plates respectively folded and arranged on the front and back long sides of the rectangular plate. Both L-shaped plates of the support member have water passage holes so that condensate on the bottom plate can flow through the water passage holes to the drain outlet.

[0008] As a further improvement to the above technical solution, the L-shaped plate of the support leg is fixed to the base plate by welding.

[0009] As a further improvement to the above technical solution, the rectangular plate of the support member is provided with a second water passage hole that corresponds one-to-one with the number of the first water passage holes.

[0010] As a further improvement to the above technical solution, each support member has multiple second water passage holes on its rectangular plate, which are arranged at intervals along the left and right sides.

[0011] As a further improvement to the above technical solution, multiple water passages are arranged at intervals on each L-shaped plate, and each water passage is semi-circular.

[0012] As a further improvement to the above technical solution, the water receiving tray is fixed to the rectangular plate of the support member by screws.

[0013] As a further improvement to the above technical solution, the water receiving tray includes a supporting plate and flanges disposed on the left and right sides of the supporting plate.

[0014] As a further improvement to the above technical solution, the heat exchanger is fixed to the support plate of the water receiving pan by corner plates.

[0015] The beneficial effects of this utility model are as follows: The water receiving structure provided by this utility model uses multiple identical support legs to jointly support the water receiving tray. These support legs are formed by CNC machine tool drilling and sheet metal bending. Compared to existing complex support legs, its structure is simpler, reducing processing steps and lowering the requirements for processing equipment precision and performance, thereby effectively shortening the processing cycle and reducing processing costs. The rectangular and L-shaped plate structure design of the support legs provides stable support for the large and heavy heat exchanger, ensuring its firm fixation during operation, meeting its load-bearing requirements, and guaranteeing stable system operation. The overall layout of this water receiving structure is reasonable, with the support legs, water receiving tray, and outer shell base plate cooperating with each other. This simple structural design eliminates the need for professional assembly technicians to spend a lot of time on complex installation and debugging. Ordinary technicians can easily complete the installation operation, greatly saving installation time and labor costs. Furthermore, it is more convenient for later maintenance and component replacement, reducing maintenance costs and improving the overall production efficiency, reliability, and maintenance convenience of the aircraft ground air conditioning system. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a water-supporting structure for a heat exchanger.

[0017] Figure 2 This is an exploded view of the water-receiving structure.

[0018] Figure 3 This is a three-dimensional view of the support leg.

[0019] Figure 4 This is a schematic diagram of the internal structure of a closed heat exchanger.

[0020] Explanation of main component symbols: 1-Heat exchanger, 2-Shell, 21-Base plate, 210-Drain outlet, 22-Left air inlet, 23-Right air outlet, 3-Water receiving tray, 31-Support plate, 32-Flanged edge, 33-First water passage hole, 4-Support leg, 41-Rectangular plate, 42-L-shaped plate, 43-Water passage hole, 44-Second water passage hole, 45-Threaded hole, 5-Corner plate. Detailed Implementation

[0021] This utility model provides a water receiving structure for a closed heat exchanger 1. To make the purpose, technical solution, and effects of this utility model clearer and more explicit, the following describes this utility model in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit the scope of protection of this utility model.

[0022] Please see Figures 1 to 3This utility model provides a water receiving structure for a closed heat exchanger 1. The heat exchanger 1 is installed inside a shell 2. The bottom plate 21 of the shell 2 is provided with multiple support members 4 arranged at intervals along the front and back, and a water receiving tray 3 supported by the multiple support members 4. The heat exchanger 1 is fixed on the water receiving tray 3. The water receiving tray 3 is provided with a first water passage hole 33. The bottom plate 21 of the shell 2 is provided with a drain outlet 210. The support members 4 are made of sheet metal. Each support member 4 includes a rectangular plate 41 extending laterally and two L-shaped plates 42 respectively folded and arranged on the front and back long sides of the rectangular plate 41. Both L-shaped plates 42 of the support member 4 are provided with water passage holes 43 so that the condensate on the bottom plate 21 can flow through the water passage holes 43 to the drain outlet 210.

[0023] In fact, see Figure 4 As shown, the outer casing 2 is provided with a left air inlet 22 and a right air outlet 23. The outer casing 2 is also provided with a detachable front door. The heat exchanger 1 is installed inside the outer casing 2. When installing the heat exchanger 1, firstly, multiple support pieces 4 are arranged at intervals along the front and back and fixed to the bottom plate 21 of the outer casing 2. Then, the water collection tray 3 is fixed to the support pieces 4, and then the heat exchanger 1 is placed on the water collection tray 3 for fixation. When the heat exchanger 1 operates and produces condensate, the condensate drips into the water collection tray 3 under the action of gravity. The first water passage hole 33 on the water collection tray 3 allows some of the condensate to flow into the raised space between the support pieces 4 and the bottom plate 21 of the outer casing 2. Since the support member 4 is made of sheet metal, it includes a horizontally extending rectangular plate 41 and two folded L-shaped plates 42, and the L-shaped plates are provided with water passage holes 43. The condensate on the bottom plate 21 of the outer shell 2 and the condensate flowing in from the first water passage hole 33 of the water receiving tray 3 can pass through the water passage holes 43 of the support member 4 and flow to the drain outlet 210 of the bottom plate 21 of the outer shell 2, thereby completing the drainage process.

[0024] The water receiving structure provided by this utility model uses multiple identical support legs 4 to support the water receiving tray 3. The support legs 4 are formed by CNC machine tool drilling and sheet metal bending. Compared to existing complex support structures, its structure is simpler, reduces processing steps, and lowers the requirements for the precision and performance of processing equipment, thereby effectively shortening the processing cycle and reducing processing costs. The rectangular plate 41 and L-shaped plate 42 structure of the support legs 4 provide stable support for the large and heavy heat exchanger 1, ensuring its firm fixation during operation, meeting its load-bearing requirements, and guaranteeing stable system operation. The overall layout of this water receiving structure is reasonable, with the support legs 4, water receiving tray 3, base plate 21, and other components cooperating with each other. This simple structural design eliminates the need for professional assembly technicians to spend a lot of time on complex installation and debugging; ordinary technicians can easily complete the installation operation, greatly saving installation time and labor costs. Furthermore, it is more convenient for later maintenance and component replacement, reducing maintenance costs and improving the overall production efficiency, reliability, and maintenance convenience of the aircraft ground air conditioning system.

[0025] The L-shaped plate 42 of the support member 4 is fixed to the base plate 21 by welding. Firstly, welding provides stable and reliable connection strength, ensuring a firm connection between the support member 4 and the base plate 21. This provides a solid foundation for bearing the weight of the heat exchanger 1, effectively preventing displacement or instability of the heat exchanger 1 due to loose connections, further ensuring the safety and stability of the aircraft ground air conditioning system. Secondly, welding connections are relatively simple and direct. Compared to some complex mechanical connection methods, it does not require additional connecting accessories such as bolts and nuts, reducing the number and types of parts and lowering material costs. Simultaneously, welding operations can be completed efficiently by skilled workers. Compared to the potentially cumbersome assembly steps involved in other connection methods, welding can save significant installation time, improve overall assembly efficiency, help shorten the production cycle of the aircraft ground air conditioning system, and enhance production efficiency.

[0026] The rectangular plate 41 of the support member 4 has second water passage holes 44, which correspond one-to-one with the number of first water passage holes 33. This creates a close and reasonable cooperation between the water receiving tray 3 and the support member 4 in terms of drainage function, making the design of the entire water receiving structure more integrated and systematic. This synergy not only improves the smoothness of the drainage process but also allows each component to promote each other's function, reducing adverse phenomena such as poor water flow and uneven pressure caused by unreasonable local structures. The condensate on the water receiving tray 3 is introduced into the interior of the support member 4 and then discharged from the drain outlet 210 along the guide of the base plate 21, allowing the condensate to flow more smoothly from the water receiving tray 3 through the support member 4 to the drain outlet 210 of the base plate 21 of the outer shell 2.

[0027] Each support member 4 has multiple (e.g., three) second water passage holes 44 on its rectangular plate 41, arranged at intervals along the left and right sides. The arrangement of multiple water passage holes increases the drainage channels, avoiding drainage blockage or obstruction that may occur due to a single or few water passage holes, improving the drainage capacity of the entire water receiving structure, and ensuring that even when the heat exchanger 1 produces a large amount of condensate, the drainage process can be completed quickly and effectively, thereby maintaining the normal operation of the system and reducing problems such as corrosion, bacterial growth, or reduced heat exchange efficiency that may be caused by water accumulation.

[0028] Each L-shaped plate 42 has multiple water passage holes 43 spaced apart, each water passage hole 43 being semi-circular. The multiple water passage holes 43 increase the number of channels for condensate to pass through the support member 4, effectively improving the drainage speed and preventing condensate from accumulating in the space between the water tray and the bottom plate 21 of the outer shell 2 due to poor drainage. Compared with other shapes, the semi-circular design has smoother edges, resulting in less resistance when water flows through, which is more conducive to the rapid and smooth flow of condensate to the drain outlet 210. This ensures the continuous and stable operation of the heat exchange link of the entire aircraft ground air conditioning system and reduces problems such as decreased heat exchange efficiency caused by water accumulation.

[0029] In terms of ease of manufacturing, the semi-circular water passage 43 is relatively simple and easy to process. It can be precisely and efficiently formed on the L-shaped plate using CNC machining and other methods, reducing processing steps and difficulty, lowering the requirements for processing equipment, thereby shortening the processing cycle and saving processing costs. Compared to water passages with complex shapes, the semi-circular water passage 43 is also simpler in mold design and manufacturing, which helps to improve production efficiency and reduce production costs.

[0030] The water tray 3 is fixed to the rectangular plate 41 of the support member 4 by screws. Correspondingly, the rectangular plate 41 has threaded holes 45, and the water tray 3 has mounting holes corresponding to the threaded holes 45 for the screws to pass through. The screw fixing method provides high connection reliability. The screws provide a stable tightening force, firmly installing the water tray 3 onto the support member 4, effectively preventing the water tray 3 from shifting or loosening due to vibration, shaking, or other factors during the operation of the aircraft ground air conditioning system. This ensures that the water tray 3 is always in the correct position to collect the condensate generated by the heat exchanger 1, avoiding condensate leakage due to the water tray 3's misalignment, thus maintaining the normal operation of the entire water collection structure and improving the system's stability and reliability.

[0031] Secondly, the screw fixing facilitates installation and disassembly. During the assembly of the closed heat exchanger 1, connecting the water tray 3 and the support legs 4 with screws is relatively simple and convenient. Ordinary assembly workers can operate this skillfully without requiring special professional skills or complex installation tools, effectively improving assembly efficiency and shortening the production cycle. Furthermore, in subsequent maintenance, repairs, or equipment upgrades, if it is necessary to disassemble the water tray 3, it can be easily completed by simply unscrewing the screws. This facilitates cleaning, inspection, or replacement of the interior of the water tray 3, reducing maintenance difficulty and costs, and improving the maintainability and flexibility of the system.

[0032] Specifically, the water collection tray 3 includes a supporting plate 31 and flanges 32 disposed on the left and right sides of the supporting plate 31. The supporting plate 31, as the main receiving surface, can collect condensate from the heat exchanger 1 over a large area, while the flanges 32 on the left and right sides effectively prevent condensate from overflowing from the left and right sides of the water collection tray 3, further expanding the effective collection range of the water collection tray 3, improving the integrity and accuracy of condensate collection, ensuring that as much condensate as possible generated by the heat exchanger 1 is collected into the water collection tray 3, avoiding adverse effects on other components of the aircraft ground air conditioning system or the surrounding environment due to condensate leakage, and ensuring the normal operation of the system. The flanges 32 increase the overall structural rigidity of the water collection tray 3. When the support plate 31 bears the weight of condensate and may be subjected to external impact forces (such as vibration during system operation), the flange 32 can act as a reinforcing rib, share the force, reduce the risk of deformation of the support plate 31, thereby improving the durability and reliability of the water receiving tray 3, enabling it to stably perform its water receiving function during long-term use, reducing the probability of system failure caused by damage to the water receiving tray 3, and extending the maintenance cycle and service life of the aircraft ground air conditioning.

[0033] Preferably, the heat exchanger 1 is fixed to the support plate 31 of the water receiving tray 3 by means of corner plates 5. The corner plates 5 can provide stable support and connection for the heat exchanger 1 at multiple contact points. It can effectively distribute the weight of the heat exchanger 1 and avoid damage to the water receiving tray 3 or insecure fixation due to excessive local stress. This multi-point fixing method makes the installation of the heat exchanger 1 on the water receiving tray 3 more secure and reliable. Even when the aircraft ground air conditioning system faces complex conditions such as vibration and airflow impact during operation, it can ensure that the heat exchanger 1 always maintains a stable position, thereby ensuring the stable operation of the entire heat exchange process, reducing potential problems such as heat exchange efficiency fluctuations and loose pipe connections caused by displacement of the heat exchanger 1, and improving the safety and reliability of system operation.

[0034] In fact, the bottom plate 21 of the outer casing 2 has a slope of 2°-3° to allow condensate to flow to the drain outlet 210.

[0035] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0036] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] It is understood that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of this utility model, and all such substitutions or changes should fall within the protection scope of this utility model.

Claims

1. A water receiving structure for a closed heat exchanger, characterized in that, The heat exchanger is housed inside the outer casing. The bottom plate of the outer casing has multiple support legs arranged at intervals along the front and back, and a water receiving tray supported by the multiple support legs. The heat exchanger is fixed on the water receiving tray, which has a first water passage hole. The bottom plate of the outer casing has a drain outlet. The support legs are made of sheet metal. Each support leg includes a laterally extending rectangular plate and two L-shaped plates that are respectively folded and set on the front and back long sides of the rectangular plate. Both L-shaped plates of the support leg have water passage holes so that the condensate on the bottom plate can flow through the water passage holes to the drain outlet.

2. The water receiving structure of the closed heat exchanger according to claim 1, characterized in that, The L-shaped plate of the support leg is fixed to the base plate by welding.

3. The water receiving structure of the closed heat exchanger according to claim 1, characterized in that, The rectangular plate of the support member has a second water passage hole that corresponds one-to-one with the number of the first water passage holes.

4. The water receiving structure of the closed heat exchanger according to claim 3, characterized in that, Each support member has multiple second water passage holes on its rectangular plate, arranged at intervals along the left and right sides.

5. The water receiving structure of the closed heat exchanger according to claim 1, characterized in that, Each L-shaped plate has multiple water passages spaced apart, and each water passage is semi-circular.

6. The water receiving structure of the closed heat exchanger according to claim 1, characterized in that, The water receiving tray is fixed to the rectangular plate of the support leg by screws.

7. The water receiving structure of the closed heat exchanger according to claim 1, characterized in that, The water receiving tray includes a support plate and flanges disposed on the left and right sides of the support plate.

8. The water receiving structure of the closed heat exchanger according to claim 7, characterized in that, The heat exchanger is fixed to the support plate of the water receiving tray by fins.

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