Air heat exchanger with wide runner plate type heat exchange

Abstract

The utility model relates to the technical field of air heat exchange, and discloses an air heat exchanger with a wide runner plate type heat exchanger. The technical problem that in the prior art, when fluid flows in a channel, the contact area between the fluid and a heat exchange plate is limited, disturbance is insufficient, and the heat exchange efficiency is low is solved. The heat exchanger comprises a heat exchange core body, the heat exchange core body comprises a plurality of heat exchange plates arranged side by side, an outer channel is formed between every two adjacent heat exchange plates, the left side of each outer channel is communicated with an air inlet, and the right side of each outer channel is communicated with an air outlet; each heat exchange plate is of a double-face protruding structure so as to form a corrugated wide-runner type inner channel, the inlet end of each inner channel is connected with a plate inlet pipe, the outlet end of each inner channel is connected with a plate outlet pipe, the plate inlet pipes are connected through a main inlet pipe, and the plate outlet pipes are connected through a main outlet pipe. The heat exchanger is high in heat exchange efficiency, can adapt to connection of different pipelines, improves the strength and stability of the heat exchange half pieces, and is convenient to install and fix.

Description

TECHNICAL FIELD

[0001] The utility model relates to air heat exchange technical field especially relates to a kind of air heat exchanger with wide runner plate heat exchange. BACKGROUND

[0002] Heat exchanger is a kind of equipment widely used in industrial production and daily life, in chemical industry, petroleum, power, food and other many industrial production, often need to control the temperature of fluid. With the increasingly prominent energy problem, improving energy utilization efficiency becomes an important goal in industrial production. Heat exchanger can effectively recover and utilize the waste heat generated in production process, transfer the heat of high-temperature fluid to low-temperature fluid needing heating, thereby reducing energy consumption and reducing production cost. With the continuous development of industrial production, the performance and efficiency of heat exchange equipment are increasingly improved. Traditional heat exchange equipment such as tube-shell heat exchanger, although widely used, but there are limitations in heat transfer efficiency, volume, disassembly and cleaning. Plate heat exchanger is gradually favored with its high efficiency, compact, detachable and other advantages, and heat exchange plate as its core component, performance directly affects the performance of heat exchanger, so the research and improvement of heat exchange plate become the key to improve the performance of heat exchanger. Air heat exchanger is a kind of heat exchange equipment widely used in industry, building and other fields, mainly used for heat exchange between air and air, air and liquid (such as water, steam, refrigerant, etc.).

[0003] Chinese invention patent publication CN103134067A discloses a flat plate air preheater, which comprises a shell and a heat exchange device in the shell. The top of the shell is provided with a flue gas inlet, the bottom of the shell is provided with an exhaust outlet, the upper part of one side of the shell is provided with an air outlet, and the lower part of the other side of the shell is provided with an air inlet. The heat exchange device comprises two groups of heat transfer pipes, each group of heat transfer pipes has a plurality of the same heat transfer pipes, each heat transfer pipe is stacked with each other, and the axial directions of each heat transfer pipe are the same. The upper opening of one group of heat transfer pipes is connected with the flue gas inlet, the lower opening of the other group of heat transfer pipes is connected with the flue gas outlet, the two groups of heat transfer pipes are arranged in upper and lower positions, and the lower opening of the heat transfer pipe in the upper position is connected with the upper opening of the heat transfer pipe in the lower position. Each heat transfer pipe comprises a turbulence rib and two identical plate bodies. The shape of the vertical section of the plate body is a "door" type. The opening ends of the two plate bodies are connected to form a pipeline. The turbulence rib has a plurality of ribs, which are connected to the inner surface and the outer surface of the plate body. The length direction of the turbulence rib connected to the inner surface of the plate body is consistent with the length direction of the pipeline, and the turbulence rib is linear. The length direction of the turbulence rib connected to the outer surface of the plate body is perpendicular to the length direction of the pipeline, and the turbulence rib is "S" type. However, the above plate body is only used to form a flue gas flow channel, and cannot simultaneously play a limiting function for the air flow channel. The air flow channel is completely limited by the shell. Therefore, at least the following defects exist: first, the air in the air flow channel cannot be uniformly heated. For example, the air temperature near the plate part is relatively high, and the air temperature near the shell part is relatively low. Second, the multi-flow design of the air flow channel is completely constrained by the shape of the shell. The production and processing requirements for the shell are too high, resulting in high production cost and difficult processing and manufacturing. In view of the above defects in the prior art, the present application is produced after in-depth research. SUMMARY

[0004] In view of the above technical problems, the present disclosure provides an air heat exchanger with wide flow channel plate heat exchange, which solves the technical problem of low heat exchange efficiency caused by limited contact area and insufficient disturbance of fluid in the channel in the prior art.

[0005] According to one aspect of the present disclosure, an air heat exchanger with wide flow channel plate heat exchange is provided, which comprises a heat exchange core body, the heat exchange core body comprises a plurality of heat exchange plates arranged side by side, and an outer channel is formed between adjacent heat exchange plates. The left side of the outer channel is connected to an air inlet, and the right side is connected to an air outlet. The heat exchange plate is a double-face convex structure, forming a corrugated wide flow channel type inner channel. The inlet end of the inner channel is connected to a plate inlet pipe, and the outlet end is connected to a plate outlet pipe. The plate inlet pipes are connected through a total inlet pipe, and the plate outlet pipes are connected through a total outlet pipe.

[0006] In some embodiments of the present disclosure, the inner channel of the heat exchange plate is a one-way flow channel, a plurality of guide strips are staggered along the flow direction of the fluid in the one-way flow channel, so that the fluid moves forward in the one-way flow channel along a W shape or an M shape.

[0007] In some embodiments of the present disclosure, the length of the guide strip is 1 / 3-2 / 3 of the heat exchange plate, and the spacing between adjacent guide strips is 1 / 10-1 / 2 of the channel width.

[0008] In some embodiments of the present disclosure, mounting holes are arranged at the ends of the total inlet pipe and the total outlet pipe, and the mounting holes are flange connection structures or threaded connection structures.

[0009] In some embodiments of the present disclosure, the cross-sectional shape of the air inlet and the air outlet is circular or square, and mounting holes are arranged at the ends of the air inlet and the air outlet, and the mounting holes are uniformly distributed with 4-8 bolt fixing positions along the axial direction of the air inlet and the air outlet.

[0010] In some embodiments of the present disclosure, the heat exchange plate is two single plates welded together by a plurality of welding points, and the welding points are arranged in a staggered grid shape.

[0011] In some embodiments of the present disclosure, the inner layer of the heat exchange plate is metal, and the outer layer is coated with a corrosion-resistant coating.

[0012] The beneficial effects of the present application are as follows:

[0013] The design of the inner channel increases the contact area of the fluid with the heat exchange plates, while enhancing the disturbance of the fluid within the channel, improving the heat exchange efficiency. The heat exchange plates can adapt to different working conditions and fluid conditions. This flexible connection method facilitates matching with different system pipelines, improving the versatility and adaptability of the heat exchanger. The welding enhances the overall strength and stability of the heat exchange plates, ensuring stable operation under high temperature, high pressure and other working conditions, prolonging the service life of the heat exchanger. The metal coating of corrosion-resistant coating not only ensures good heat conduction performance, but also enhances the corrosion resistance of the heat exchange plates, which can adapt to different medium environments and reduce maintenance costs. The installation hole is provided for convenient connection and fixation with external pipelines, which facilitates fixation according to actual installation requirements, improving the convenience and flexibility of installation. The modular design facilitates increasing or decreasing the number of plates according to heat exchange requirements, and flexibly adjusting the heat exchange area. The compact structure saves installation space compared with traditional shell-and-tube heat exchangers. The heat exchange plates adopt a double-sided convex structure to increase the heat exchange area and improve the heat exchange efficiency. The structure strength is enhanced to avoid deformation of the plates under high pressure. The outer channel optimizes air flow distribution, reduces air flow dead zones, and improves heat exchange uniformity. The air side resistance is reduced to reduce the energy consumption of the fan. The inner channel is a one-way flow channel to avoid excessive pressure drop caused by complex flow channels. Turbulence is strengthened to break the laminar boundary layer and improve the heat transfer coefficient. Flow short circuit is avoided to ensure that the fluid fully contacts the heat exchange surface. The risk of fouling is reduced, and turbulence can reduce the deposition of sediments. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 It is a structure schematic diagram of an air heat exchanger with wide flow channel plate heat exchange;

[0015] Fig. 2 It is another perspective structure schematic diagram of an air heat exchanger with wide flow channel plate heat exchange;

[0016] The names of the components in the figure are as follows: 1, heat exchange core; 2, heat exchange plate; 3, outer channel; 4, air inlet; 5, air outlet; 6, inner channel; 7, plate inlet pipe; 8, plate outlet pipe; 9, total inlet pipe; 10, total outlet pipe; 11, guide bar; 12, mounting hole. DETAILED DESCRIPTION

[0017] The preferred embodiments of the present application will be described below in conjunction with the accompanying drawings, and it should be understood that the preferred embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application. Example 1

[0018] This example discloses an air heat exchanger with wide flow channel plate heat exchange, as shown in Figs. 1-2; including heat exchange core 1, heat exchange core 1 includes several parallelly arranged heat exchange plates 2, and outer passage 3 is formed between adjacent heat exchange plates 2, and outer passage 3 is communicated with air inlet 4 on the left side and air outlet 5 on the right side; heat exchange plate 2 is double-face convex structure, and inner passage 6 in the form of corrugated wide channel is formed, the inlet end of inner passage 6 is connected with plate inlet pipe 7, and the outlet end is connected with plate outlet pipe 8; plate inlet pipe 7 is connected through total inlet pipe 9, and plate outlet pipe 8 is connected through total outlet pipe 10.

[0019] The inner passage of heat exchange plate 2 is a one-way channel, and a plurality of guide strips 11 are arranged in the one-way channel along the flow direction of the fluid in the one-way channel, so that the fluid moves forward along the W-shaped or M-shaped circulation in the one-way channel.

[0020] The length of guide strip 11 is 1 / 3~2 / 3 of the heat exchange plate, and the spacing between adjacent guide strips 11 is 1 / 10~1 / 2 of the channel width.

[0021] The end of total inlet pipe 9 and total outlet pipe 10 is provided with mounting hole 12, and mounting hole 12 is flange connection structure or screw connection structure.

[0022] The cross-sectional shape of air inlet 4 and air outlet 5 is circular or square, and the end is provided with mounting hole 12, and mounting hole 12 is uniformly distributed with 4~8 bolt fixing positions along the air inlet and air outlet axis.

[0023] The heat exchange plate 2 is two single plates welded together through a plurality of welding points, and the welding points are arranged in the form of staggered grid.

[0024] The inner layer of heat exchange plate is metal, and the outer layer is coated with corrosion-resistant coating.

[0025] During operation, external air enters through the air inlet 4, flows through the outer channels 3 formed between adjacent heat exchange plates 2, and is finally discharged from the air outlet 5. The air exchanges heat with the outer surface of the heat exchange plates 2 when flowing through the outer channels 3. The heat exchange medium enters from the total inlet pipe 9, is distributed to each plate inlet pipe 7, and then flows into the inner channels 6 of the heat exchange plates 2. Since the inner channels 6 are one-way flow channels and are provided with guide strips 11, the fluid will flow along a W-shaped or M-shaped path, forming turbulent flow and enhancing heat exchange efficiency. The fluid after heat exchange is collected from the plate outlet pipe 8 to the total outlet pipe 10, completing the circulation. The air and the fluid exchange heat indirectly through the metal wall of the heat exchange plates 2, avoiding direct mixing. Since the heat exchange plates 2 adopt a double-face convex structure, the effective heat exchange area is increased, and the guide strips 11 strengthen the disturbance on the fluid side, improving the heat transfer coefficient. The corrosion-resistant coating can prevent the plate from being eroded by humid or corrosive gas, ensuring long-term stable operation. The wide channel design and the guide strip turbulent flow strengthening significantly improve the heat transfer efficiency. The flow channel layout is optimized to reduce the pressure drop on the air side and the fluid side, reducing the energy consumption of the fan / pump. The heat exchange capacity can be adjusted by increasing or decreasing the number of heat exchange plates. The staggered grid welding points enhance the structural strength. The corrosion-resistant coating prolongs the service life.

[0026] Although some preferred embodiments of the present application have been described, those skilled in the art, once they know the basic creative concept, can make further changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0027] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application also intends to include these modifications and variations.

Claims

1. An air heat exchanger with wide flow channel plate heat exchanger, characterized in that: The heat exchange core comprises a plurality of heat exchange plates arranged side by side, and an outer channel is formed between adjacent heat exchange plates, the left side of the outer channel is communicated with an air inlet, and the right side is communicated with an air outlet; the heat exchange plate is a double-face convex structure to form a corrugated wide channel type inner channel, the inlet end of the inner channel is connected with a plate inlet pipe, and the outlet end is connected with a plate outlet pipe, the plate inlet pipes are connected through a total inlet pipe, and the plate outlet pipes are connected through a total outlet pipe.

2. The air-to-air heat exchanger with wide flow channel plates as claimed in claim 1, characterized in that: The inner channel of the heat exchange plate is a one-way channel, a plurality of guide strips are arranged in the one-way channel along the flow direction of the fluid in the one-way channel, so that the fluid moves forward in the one-way channel along a W shape or an M shape.

3. The air-to-air heat exchanger with wide flow channel plates as claimed in claim 2, characterized in that: The length of the guide strip is 1 / 3-2 / 3 of the heat exchange plate, and the spacing between adjacent guide strips is 1 / 10-1 / 2 of the channel width.

4. The air-to-air heat exchanger with wide flow channel plates as claimed in claim 1, wherein: The total inlet pipe and the total outlet pipe are provided with mounting holes at the end portions, the mounting holes are flange connection structures or threaded connection structures.

5. The air-to-air heat exchanger with wide flow channel plates as claimed in claim 1, wherein: The cross-sectional shape of the air inlet and the air outlet is circular or square, and mounting holes are arranged at the end portions, the mounting holes are uniformly distributed along the axial direction of the air inlet and the air outlet, and 4-8 bolt fixing positions are arranged.

6. The air-to-air heat exchanger with wide flow channel plates as claimed in claim 1, wherein: The heat exchange plate is two single plates welded together through a plurality of welding points, and the welding points are arranged in an interlaced grid shape.

7. The air-to-air heat exchanger with wide flow channel plates as claimed in claim 1, wherein: The inner layer of the heat exchange plate is metal, and the outer layer is coated with a corrosion-resistant coating.

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