A high pressure microchannel heat exchanger and method of use thereof

Abstract

The application relates to the technical field of micro-channel heat exchangers, and discloses a high-pressure micro-channel heat exchanger and a use method thereof, which comprises an outer shell, the inside of the outer shell is provided with a vortex micro-channel plate, a fluid cavity is formed between the outer shell and the vortex micro-channel plate, the micro-channel direction of the vortex micro-channel plate is parallel to the axis direction of the outer shell, the outside of the outer shell is fixedly connected with a fluid inlet and a fluid outlet, the fluid inlet is in communication with the outside cavity of the fluid cavity, and the fluid outlet is in communication with the central cavity of the fluid cavity. Through the vortex micro-channel plate and the vortex fluid cavity, the basic stroke and the contact time of the fluid and the medium are effectively increased, the heat exchange rate is guaranteed, meanwhile, the vortex micro-channel plate can absorb the stress generated by the high-pressure fluid or the high-temperature-difference fluid through the deformation of micro-expansion or micro-constriction according to its own shape characteristics when the high-pressure fluid or the high-temperature-difference fluid is contacted, and the resistance to the high-pressure fluid and the high-temperature-difference fluid is improved.

Description

Technical Field

[0001] This invention relates to the field of microchannel heat exchanger technology, specifically a high-pressure microchannel heat exchanger and its usage method. Background Technology

[0002] As a type of heat exchanger, microchannel heat exchangers are mainly used for heat exchange and heat transfer. Compared with ordinary heat exchangers, microchannel heat exchangers have the characteristics of high heat exchange efficiency, small size, and light weight. They are a compact heat exchanger that can meet the development needs of the electronics industry and are gradually being applied in the air conditioning field.

[0003] However, existing microchannel heat exchangers are usually flat and straight plate structures that exchange heat through fluid flow. Although they can improve heat exchange efficiency to some extent compared with existing ordinary heat exchangers, their flat and straight plate structure results in poor high pressure resistance and poor temperature difference resistance, which seriously affects the application range and performance of existing microchannel heat exchangers. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a high-pressure microchannel heat exchanger with high heat exchange efficiency, good resistance to temperature differences and high pressures, and its usage method.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0006] A high-pressure microchannel heat exchanger and its usage method are disclosed, comprising an outer shell, wherein a vortex-shaped microchannel plate is disposed inside the outer shell, and a fluid cavity is formed between the outer shell and the vortex-shaped microchannel plate. The microchannel direction of the vortex-shaped microchannel plate is parallel to the axial direction of the outer shell. A fluid inlet and a fluid outlet are fixedly connected to the outside of the outer shell. The fluid inlet is connected to the outer cavity of the fluid cavity, and the fluid outlet is connected to the central cavity of the fluid cavity. A medium inlet and a medium outlet are respectively disposed on both sides of the vortex-shaped microchannel plate.

[0007] Preferably, the vortex microchannel plate comprises several microchannel plates, which are welded together. This multi-stage welding assembly reduces processing difficulty and cost. Furthermore, by using multiple sets of microchannel plates, it can withstand high-pressure fluids and high-temperature differential fluids in sections, thus improving its strength.

[0008] Preferably, side partitions are fixedly connected to both sides of the outer shell, and the side partitions and the vortex-shaped microchannel plate are sealed and abutted together. The side partitions on both sides are sealed and connected to the outer shell, and the fluid cavity forms a vortex structure in the outer shell. Through the vortex-shaped microchannel plate and the vortex-shaped fluid cavity, the basic travel and contact time of the fluid and medium are effectively increased, ensuring the heat exchange rate. At the same time, the vortex-shaped microchannel plate, based on its own shape characteristics, can absorb the stress generated by the high-pressure fluid or high-temperature differential fluid through its own micro-expansion or micro-contraction deformation when in contact with high-pressure fluid or high-temperature differential fluid, thereby improving its tolerance to high-pressure fluid and high-temperature differential fluid.

[0009] Preferably, an outer cover plate is fixedly connected to the outside of the side partition, and a blocking plate is fixedly connected between the side partition and the outer cover plate. Two sets of closed-loop diverting strips are provided between the side partition and the blocking plate. The diverting strips form a three-component manifold between the side partition and the blocking plate. A main manifold is formed between the blocking plate and the outer cover plate. The blocking plate has a guide hole that connects the main manifold and the three-component manifold.

[0010] Preferably, the main manifold and the sub-manifold are both located on both sides of the vortex microchannel plate. The main manifold and the sub-manifold are located between the vortex microchannel plate and the medium inlet and the medium outlet. The medium inlet and the medium outlet are respectively connected to the main manifold on both sides. The medium inlet is located at the axial position of the outer cover plate, and the medium outlet is located at the eccentric position of the outer cover plate.

[0011] Preferably, the three-component manifolds on both sides of the vortex microchannel plate are connected through the microchannels of the vortex microchannel plate.

[0012] Preferably, the fluid inlet is fixedly connected to the side of the outer casing, and the fluid inlet is located at the outer end of the vortex microchannel plate. The fluid outlet and the outer casing are collinear.

[0013] A method for using a high-pressure microchannel heat exchanger, implemented using the aforementioned high-pressure microchannel heat exchanger, includes the following specific steps:

[0014] S1. The heating medium flows into the main manifold through the medium inlet;

[0015] S2. High-pressure fluid enters the fluid cavity inside the outer shell through the fluid inlet;

[0016] S3. The heating medium flows into the sub-combination chamber through the main manifold;

[0017] S4. The heating medium then enters the manifold and main manifold on the other side of the outer shell through the vortex microchannel plate inside the outer shell, and then flows out through the medium outlet.

[0018] S5. High-pressure fluid flows along the vortex channel in the fluid cavity toward the center of the outer shell.

[0019] S6. The high-pressure fluid flows through the vortex microchannel plate to the axial position of the outer shell, and then flows out through the fluid outlet.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] 1. The high-pressure microchannel heat exchanger and its usage method effectively increase the basic travel and contact time between the fluid and the medium through the vortex-shaped microchannel plate and the vortex-shaped fluid cavity, ensuring the heat exchange rate. At the same time, the vortex-shaped microchannel plate, based on its own shape characteristics, can absorb the stress generated by the high-pressure fluid or high-temperature differential fluid through its own micro-expansion or micro-contraction deformation when in contact with high-pressure fluid or high-temperature differential fluid, thereby improving its tolerance to high-pressure fluid and high-temperature differential fluid.

[0022] 2. The high-pressure microchannel heat exchanger and its usage method are made by welding several microchannel plates together using a vortex microchannel plate, thereby reducing the processing difficulty and cost. Furthermore, by using multiple sets of microchannel plates, it can withstand high-pressure fluid and high-temperature differential fluid in sections, thus improving its strength.

[0023] 3. The high-pressure microchannel heat exchanger and its usage method, through the use of the main manifold and the sub-manifold, enable the medium to be effectively and evenly distributed into the microchannels of several microchannel plates. Through two-stage flow distribution, the flow distribution effect of the medium is effectively guaranteed, thereby further improving the heat exchange efficiency of the medium and fluid. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall connection of the structure of the present invention;

[0025] Figure 2 This is a schematic diagram showing the connection state between the outer shell and the medium inlet of the present invention;

[0026] Figure 3 This is a schematic diagram of the flow distribution and merging cavity of the present invention;

[0027] Figure 4 This is a schematic diagram showing the connection between the outer shell and the vortex microchannel plate of the present invention.

[0028] Figure 5 This is a schematic diagram of the microchannel single-board structure of the present invention.

[0029] In the figure: 1. Outer shell; 11. Fluid cavity; 2. Vortex microchannel plate; 21. Microchannel plate; 3. Side partition; 31. Diverter strip; 32. Diverter-manifold cavity; 4. Outer cover plate; 41. Blocking plate; 42. Main manifold cavity; 43. Guide hole; 5. Medium inlet; 6. Medium outlet; 7. Fluid inlet; 8. Fluid outlet. Detailed Implementation

[0030] The technical solutions in the embodiments of the present invention will now be clearly and completely described in conjunction with the accompanying drawings.

[0031] Example 1: As Figure 1-5 As shown, a high-pressure microchannel heat exchanger includes an outer shell 1. A vortex-shaped microchannel plate 2 is disposed inside the outer shell 1, forming a fluid cavity 11 between the outer shell 1 and the vortex-shaped microchannel plate 2. The microchannel direction of the vortex-shaped microchannel plate 2 is parallel to the axial direction of the outer shell 1. A fluid inlet 7 and a fluid outlet 8 are fixedly connected to the outside of the outer shell 1. The fluid inlet 7 communicates with the outer cavity of the fluid cavity 11, and the fluid outlet 8 communicates with the central cavity of the fluid cavity 11. A medium inlet 5 and a medium outlet 6 are respectively disposed on both sides of the vortex-shaped microchannel plate 2. The fluid inlet 7 is fixedly connected to the side of the outer shell 1, located at the outer end of the vortex-shaped microchannel plate 2. The fluid outlet 8 is collinear with the axis of the outer shell 1. Fluid flows in through the fluid inlet 7, while the medium mainly flows in through the medium inlet 5. The fluid and medium exchange heat within the fluid cavity 11 of the outer shell 1. Then, the fluid flows out through the fluid outlet 8, and the medium flows out through the medium outlet 6.

[0032] Among them, the vortex microchannel plate 2 includes several microchannel single plates 21. The vortex microchannel plate 2 is welded together from several microchannel single plates 21. Since the vortex microchannel plate 2 is composed of multi-stage welding, the processing difficulty and processing cost are reduced. Moreover, by being composed of multiple sets of microchannel single plates 21, it can withstand high pressure fluid and high temperature difference fluid in sections, thereby improving the bearing strength.

[0033] The outer shell 1 has side partitions 3 fixedly connected to both sides, and the side partitions 3 and the vortex-shaped microchannel plate 2 are sealed and abutted together. The side partitions 3 on both sides are sealed and connected to the outer shell 1, and the fluid cavity 11 forms a vortex structure in the outer shell 1. Through the vortex-shaped microchannel plate 2 and the vortex-shaped fluid cavity 11, the basic stroke and contact time of the fluid and medium are effectively increased, ensuring the heat exchange rate. At the same time, the vortex-shaped microchannel plate 2, based on its own shape characteristics, can absorb the stress generated by the high-pressure fluid or high-temperature differential fluid through its own micro-expansion or micro-contraction deformation when in contact with high-pressure fluid or high-temperature differential fluid, thereby improving its tolerance to high-pressure fluid and high-temperature differential fluid.

[0034] The side partition 3 is fixedly connected to an outer cover plate 4. A blocking plate 41 is fixedly connected between the side partition 3 and the outer cover plate 4. Two sets of closed-loop diverter strips 31 are provided between the side partition 3 and the blocking plate 41. The diverter strips 31 form a three-component confluence cavity 32 between the side partition 3 and the blocking plate 41. The three-component confluence cavities 32 on both sides of the vortex microchannel plate 2 are connected through the microchannel of the vortex microchannel plate 2. A main confluence cavity 42 is formed between the blocking plate 41 and the outer cover plate 4. The blocking plate 41 has a guide hole 43 that connects the main confluence cavity 42 and the three-component confluence cavity 32.

[0035] The main manifold 42 and the sub-manifold 32 are both located on both sides of the vortex microchannel plate 2. The main manifold 42 and the sub-manifold 32 are located between the vortex microchannel plate 2 and the medium inlet 5 and the medium outlet 6. The medium inlet 5 and the medium outlet 6 are respectively connected to the main manifold 42 on both sides. The medium inlet 5 is located at the axial position of the outer cover plate 4, and the medium outlet 6 is located at the eccentric position of the outer cover plate 4.

[0036] The medium flows into the main manifold 42 through the medium inlet 5, and then is diverted into the three-component manifold 32 through the guide hole 43. Within the manifold 32, it flows through the microchannels of several microchannel plates 21 into another manifold 32 on the outer shell 1. From there, it flows into the main manifold 42 on the other side, where it converges and then flows out through the medium outlet 6. The use of the main manifold 42 and the manifold 32 effectively and evenly distributes the medium into the microchannels of the several microchannel plates 21. This two-stage diversion process effectively ensures the diversion effect of the medium, thereby further improving the heat exchange efficiency between the medium and the fluid.

[0037] Example 2: Figure 1-5 As shown, a method for using a high-pressure microchannel heat exchanger, implemented using the aforementioned high-pressure microchannel heat exchanger, includes the following steps:

[0038] S1. The heating medium flows into the main manifold 42 through the medium inlet 5;

[0039] S2. High-pressure fluid enters the fluid cavity 11 inside the outer shell 1 through the fluid inlet 7;

[0040] S3. The heating medium flows into the branch manifold 32 through the main manifold 42;

[0041] S4. The heating medium then enters the other side of the outer shell 1 through the vortex microchannel plate 2 inside the outer shell 1 into the manifold 32 and the main manifold 42, and then flows out through the medium outlet 6.

[0042] S5. High-pressure fluid flows along the vortex channel in fluid cavity 11 toward the center of outer shell 1;

[0043] S6. The high-pressure fluid flows through the vortex microchannel plate 2 to the axial position of the outer shell 1, and then flows out through the fluid outlet 8.

[0044] Although preferred embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications and substitutions can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-pressure microchannel heat exchanger, comprising an outer shell (1), characterized in that: The shell (1) is provided with a vortex-shaped microchannel plate (2) inside, and a fluid cavity (11) is formed between the shell (1) and the vortex-shaped microchannel plate (2). The microchannel direction of the vortex-shaped microchannel plate (2) is parallel to the axial direction of the shell (1). A fluid inlet (7) and a fluid outlet (8) are fixedly connected to the outside of the shell (1). The fluid inlet (7) is connected to the outer cavity of the fluid cavity (11), and the fluid outlet (8) is connected to the central cavity of the fluid cavity (11). A medium inlet (5) and a medium outlet (6) are respectively provided on both sides of the vortex-shaped microchannel plate (2). The vortex microchannel plate (2) includes several microchannel single plates (21), and the vortex microchannel plate (2) is welded together from several microchannel single plates (21); Side partitions (3) are fixedly connected to both sides of the outer shell (1). The side partitions (3) and the vortex microchannel plate (2) are sealed and abutted together. The side partitions (3) on both sides are sealed and connected to the outer shell (1). The fluid cavity (11) forms a vortex structure in the outer shell (1). An outer cover plate (4) is fixedly connected to the outside of the side partition (3). A blocking plate (41) is fixedly connected between the side partition (3) and the outer cover plate (4). Two sets of closed-loop diversion strips (31) are provided between the side partition (3) and the blocking plate (41). The diversion strips (31) construct a three-component manifold (32) between the side partition (3) and the blocking plate (41). A main manifold (42) is formed between the blocking plate (41) and the outer cover plate (4). The blocking plate (41) has a guide hole (43) that connects the main manifold (42) and the three-component manifold (32). The main manifold (42) and the sub-manifold (32) are both located on both sides of the vortex microchannel plate (2). The main manifold (42) and the sub-manifold (32) are located between the vortex microchannel plate (2) and the medium inlet (5) and the medium outlet (6). The medium inlet (5) and the medium outlet (6) are respectively connected to the main manifold (42) on both sides. The medium inlet (5) is located at the axial position of the outer cover plate (4), and the medium outlet (6) is located at the eccentric position of the outer cover plate (4).

2. The high-pressure microchannel heat exchanger according to claim 1, characterized in that: The three-component manifold (32) on both sides of the vortex microchannel plate (2) is connected through the microchannel of the vortex microchannel plate (2).

3. A high-pressure microchannel heat exchanger according to claim 2, characterized in that: The fluid inlet (7) is fixedly connected to the side of the outer shell (1). The fluid inlet (7) is located at the outer end of the vortex microchannel plate (2). The fluid outlet (8) and the outer shell (1) are collinear.

4. A method of using the high-pressure microchannel heat exchanger according to any one of claims 1-3, characterized in that, Includes the following steps: S1. The heating medium flows into the main manifold (42) through the medium inlet (5); S2. High-pressure fluid enters the fluid cavity (11) inside the outer shell (1) through the fluid inlet (7). S3, The heating medium flows into the sub-combination chamber (32) through the main manifold (42); S4. The heating medium then enters the other side of the outer shell (1) through the vortex microchannel plate (2) inside the outer shell (1) into the manifold (32) and the main manifold (42), and then flows out through the medium outlet (6); S5. High-pressure fluid flows in the fluid cavity (11) along the vortex channel toward the center of the outer shell (1); S6. The high-pressure fluid flows through the vortex microchannel plate (2) to the axial position of the outer shell (1) and then flows out through the fluid outlet (8).

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