Heat exchange device with water distribution function

Abstract

The invention discloses a heat exchange device with a water distribution function. Comprising a shell (1), a heat exchange core body (2) is arranged in the shell (1), and a hot side outlet of the heat exchange core body (2) is communicated with an air outlet (4) of the shell (1) through a liquid collecting cavity (3); more than one liquid collecting plate (5) is arranged in the liquid collecting cavity (3) from top to bottom, and pores (6) are distributed on the liquid collecting plates (5). According to the invention, cooling and dehumidification of air in the cabin are realized.

Description

Technical Field

[0001] This invention relates to the field of aviation technology, and in particular to a heat exchange device with a water separation function. Background Technology

[0002] Increased humidity in the airborne environment can damage electronic equipment, reduce passenger comfort, and promote the growth of bacteria or mold. Increased humidity may also affect the accuracy of sensors such as temperature and pressure sensors. Therefore, maintaining a certain level of humidity in the air is crucial for improving passenger comfort, extending the lifespan of electronic equipment, and ensuring sensor stability. Summary of the Invention

[0003] The purpose of this invention is to provide a heat exchange device with water separation function. This invention achieves cooling and dehumidification of the air inside the cabin.

[0004] Technical solution. A heat exchange device with water separation function includes a shell, a heat exchange core is installed inside the shell, and the hot side outlet of the heat exchange core is connected to the air outlet of the shell through a liquid collection chamber; one or more liquid collection plates are installed from top to bottom in the liquid collection chamber, and capillary pores are distributed on the liquid collection plates.

[0005] In the aforementioned heat exchange device with water separation function, along the direction of hot fluid flow, the liquid collecting plate is provided with one or more rows of capillary tubes. The central axis of the capillary tubes is perpendicular to the liquid collecting plate, and the top of the capillary tube is provided with a boss. The bottom end face of the boss is attached to the upper surface of the liquid collecting plate.

[0006] In the aforementioned heat exchange device with water separation function, the rows of capillary tubes are arranged alternately.

[0007] In the aforementioned heat exchange device with water separation function, the liquid collecting plate, capillary pores and capillary tubes are all coated with a hydrophilic coating.

[0008] In the aforementioned heat exchange device with water separation function, the cold side inlet of the heat exchange core is arranged close to the liquid collection chamber.

[0009] In the aforementioned heat exchange device with water separation function, the width of the liquid collecting plate is 5cm to 15cm.

[0010] In the aforementioned heat exchange device with water separation function, the sum of the cross-sectional areas of the portions of each row of capillary tubes extending out of the lower surface of the liquid collecting plate is no greater than 10% of the air-side flow area.

[0011] In the aforementioned heat exchange device with water separation function, the height of the boss is more than twice the thickness of the boundary layer and not less than 0.3 mm; the boundary layer is an air layer with a flow velocity of 0 flowing through the surface of the liquid collecting plate.

[0012] In the aforementioned heat exchange device with water separation function, the capillary pores, capillary tubes, and capillary tubes are all arranged in an alternating pattern.

[0013] In the aforementioned heat exchange device with water separation function, the inner tube wall at the top of the capillary tube is provided with a transition rounded corner.

[0014] Beneficial effects: This invention employs a hydrophilic coating and capillary design in the heat exchange core. The cold-edge medium lowers the temperature of the incoming air, and the collection plate and capillary design successfully separate free water, which then flows to the collection chamber for collection. The structure incorporates three media flow channels: a hot-edge medium flow channel, a cold-edge medium flow channel, and a condensate channel. When hot air passes through the heat exchange core, the cold-edge medium carries away the heat, thereby reducing the air's moisture content. The hydrophilic coating and capillary action of the collection plate collect free droplets, providing a suitable temperature and humidity environment for the aircraft cabin.

[0015] The present invention only sets up a liquid collecting plate in the liquid collecting cavity without fins or other units, which can achieve the purpose of direct contact between the liquid collecting plate and the cooled incoming air, and can reduce the air flow resistance loss.

[0016] In this invention, the cold-side medium and the incoming air (hot-side medium) are arranged in a counter-cross flow. To improve heat exchange efficiency, the cold-side is designed as a four-flow circuit (see Figure 2(b)), which improves the overall heat exchange efficiency of the heat exchanger, significantly reduces the incoming air temperature, significantly reduces the air moisture content, and improves the water separation efficiency.

[0017] The cold-side inlet flow of this invention is adjacent to the liquid collection chamber, which provides a good pre-cooling function for the air at the outlet and improves the condensation effect.

[0018] The capillary structure designed in this invention, due to its long tube body, can effectively enhance capillary action and accelerate droplet aggregation.

[0019] In this invention, when air flows through the collecting plate, its viscosity causes it to interact with the plate surface, reducing its velocity to zero, thus forming a boundary layer. To break this boundary layer, protrusions are designed on the plate surface. The protrusion thickness is designed to be at least twice the boundary layer thickness and no less than 0.3 mm. This structure, while ensuring the brazing strength between the protrusions and the collecting plate, also breaks the influence of the boundary layer (the boundary layer thickness is positively correlated with the length of air flowing through the collecting plate (δ∝x)). 0.5 Furthermore, the boss structure increases the contact area with air, improving the liquefaction efficiency of water vapor. Moreover, the invention also designs the length of the capillary tubes extending from the collecting plate: the sum of the cross-sectional areas of the extended portions of each row of capillary tubes is no greater than 10% of the air-side flow area; this structure effectively reduces air-side flow resistance loss.

[0020] SeeFigure 4 The three rows of capillaries are arranged alternately in the first, fourth, and seventh rows. When air flows through this area, it increases air turbulence and can increase the flow velocity through the capillaries, thereby increasing the contact frequency between air and the hydrophilic coating and increasing the condensation rate of free water in the air.

[0021] This invention, based on boundary layer theory and mass transfer equations, designs the width of a liquid collection plate coated with a hydrophilic coating: minimum width L min =U·t 扩散 U is the air velocity, t 扩散 The diffusion time is related to the water vapor content in the air. In an environment with a relative humidity of 80%, the coating width can be designed to be 5cm, and in an environment with a relative humidity of 30%, it can be increased to 15cm.

[0022] In summary, this invention designs capillary pores with a hydrophilic coating and condensation function on the liquid collection plate. When air containing water vapor or fine water droplets flows across the surface of the liquid collection plate, condensation is formed by the highly absorbent hydrophilic material on the plate wall due to the adsorption effect of the coating. The condensation then flows along the wall and is discharged and collected by the capillary action of the pores and the air pressure difference, thereby achieving the purpose of cooling and dehumidifying the air inside the cabin. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 is a schematic diagram of the heat exchange core structure; where (a) is the front view of the heat exchange core; (b) is a schematic diagram of the cold side of a heat exchange core layer from the top view of (a); and (c) is a schematic diagram of the hot side of a heat exchange core layer from the top view of (a). Figure 3 This is a schematic diagram of the liquid collection plate structure; Figure 4 It is a schematic diagram of the arrangement of capillaries and capillaries; Figure 5 This is a schematic diagram of the capillary structure. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] The features and illustrative embodiments of various aspects of the present invention will now be described in detail. Numerous specific details are set forth in the following detailed description to provide a thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention may be practiced without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of the invention by illustrating examples of the invention. The invention is by no means limited to any specific setups and methods set forth below, but covers any improvements, substitutions, and modifications to structures, methods, and devices without departing from the spirit of the invention. Well-known structures and techniques are not shown in the drawings and the following description to avoid unnecessarily obscuring the invention.

[0026] Example 1. A heat exchange device with water separation function, see [link to example]. Figures 1-5 It includes a housing 1, a heat exchange core 2 inside the housing 1, and the hot side outlet of the heat exchange core 2 is connected to the air outlet 4 of the housing 1 through the liquid collection chamber 3; one or more liquid collection plates 5 are installed from top to bottom in the liquid collection chamber 3, and capillary pores 6 are distributed on the liquid collection plates 5.

[0027] Along the direction of hot fluid flow, the liquid collecting plate 5 is also provided with one or more rows of capillary tubes 7. The central axis of the capillary tube 7 is perpendicular to the liquid collecting plate 5. The top of the capillary tube 7 is provided with a boss 8, and the bottom end face of the boss 8 is attached to the upper surface of the liquid collecting plate 5.

[0028] The capillary tubes in each row are arranged in a staggered pattern of 7 sections.

[0029] The inner wall at the tip of capillary tube 7 has a rounded corner 9. This structure can increase the siphoning and accumulation effect of condensate.

[0030] The capillaries are arranged in a staggered pattern.

[0031] The capillaries 6 and capillaries 7 are arranged alternately.

[0032] The diameter of each capillary pore is no greater than 0.5 mm, and the spacing between them is no greater than 1.2 mm.

[0033] The liquid collection plate 5, capillary pores 6 and capillary tubes 7 are all coated with a hydrophilic coating.

[0034] The cold-side inlet 12 of the heat exchange core 2 is located near the liquid collection chamber 3. The flow path of the cold-side inlet is adjacent to the water collection side, which provides a good pre-cooling function for the air at the outlet and improves the condensation effect.

[0035] The width of the liquid collection plate 5 is 5cm to 15cm.

[0036] The sum of the cross-sectional areas of the portions of each row of capillary tubes 7 extending out of the lower surface of the collecting plate 5 shall not exceed 10% of the air-side flow area.

[0037] The height of the boss 8 is more than twice the thickness of the boundary layer and not less than 0.3 mm; the boundary layer is an air layer with a flow velocity of 0 flowing through the surface of the liquid collection plate 5.

[0038] The bottom of the liquid collection chamber 3 is provided with a drain port 10.

[0039] The cold-side fins 11 on the cold side of the heat exchange core 2 have a 4-flow baffle structure.

[0040] Working principle: The cold-side medium enters through the cold-side inlet 12 of the heat exchange core 2, flows through the cold-side fins 11 and exits through the cold-side outlet 14; the hot-side medium enters through the hot-side inlet 13 of the heat exchange core 2, flows through the hot-side fins 15 and exits through the hot-side outlet; after the cold and hot-side media exchange heat through the cold and hot-side fins, the hot-side medium cools down and flows out of the hot-side outlet and contacts the liquid collection plate 5. At this time, the water vapor in the hot-side medium is cooled and liquefied into small droplets, which then settle layer by layer through the capillary pores 6 to the bottom of the liquid collection chamber 3.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should be covered within the protection scope of the present invention.

Claims

1. A heat exchange device having a water diversion function, characterized by comprising: The application relates to a heat exchange core, which comprises a shell (1), a heat exchange core (2) arranged in the shell (1), and an air outlet (4) arranged on the shell (1) and communicated with the heat exchange core (2) through a liquid collecting cavity (3).

2. The heat exchange device with a water diversion function according to claim 1, characterized in that, A plurality of liquid collecting plates (5) are arranged in the liquid collecting cavity (3) from top to bottom, and a plurality of capillary holes (6) are distributed on the liquid collecting plates (5).

3. The heat exchange device with a water diversion function according to claim 2, characterized in that, A plurality of capillary tubes (7) are arranged on the liquid collecting plates (5) along the fluid flow direction of the hot side, the central axis of the capillary tubes (7) is perpendicular to the liquid collecting plates (5), the top end of the capillary tubes (7) is provided with a boss (8), and the bottom end surface of the boss (8) is attached to the upper surface of the liquid collecting plates (5).

4. The heat exchange device with a water diversion function according to claim 2, characterized in that, The capillary tubes (7) are arranged in an interlaced mode.

5. The heat exchange device with a water diversion function according to claim 1, characterized in that, The liquid collecting plates (5), the capillary holes (6) and the capillary tubes (7) are coated with a hydrophilic coating.

6. The heat exchange device with a water diversion function according to claim 4, characterized in that, The cold side inlet (12) of the heat exchange core (2) is arranged close to one side of the liquid collecting cavity (3).

7. The heat exchange device with a water diversion function according to claim 2, characterized in that, The width of the liquid collecting plates (5) is 5-15 cm.

8. The heat exchange device with a water diversion function according to claim 2, characterized in that, The sum of the cross-sectional areas of the capillary tubes (7) extending out of the lower surface of the liquid collecting plates (5) is not more than 10% of the air side flow area.

9. The heat exchange device with a water diversion function according to claim 2, characterized in that, The height of the boss (8) is more than 2 times of the thickness of the boundary layer and is not less than 0.3 mm, and the boundary layer is an air layer with a flow speed of 0 flowing through the surface of the liquid collecting plates (5).

10. The heat exchange device with a water diversion function according to claim 2, characterized in that, The capillary holes (6), the capillary tubes (7) and the capillary holes (6) and the capillary tubes (7) are arranged in an interlaced mode. The inner tube wall of the top end of the capillary tubes (7) is provided with an excessive round corner (9).

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