Two-dimensional heat pipe and heat exchanger

Abstract

The present invention discloses a two-dimensional heat pipe and heat exchanger. The two-dimensional heat pipe includes a heat pipe base, and the heat pipe base includes a condensing section and an evaporating section. A protrusion, a first coating, and a second coating are provided on the inner wall of the heat pipe base. The second coating is located at the connection between the protrusion and the inner wall and covers the protrusion for a distance along the length of the heat pipe. The first coating is provided on the inner wall and the protrusion surface where the second coating is not provided. The coating materials of the first coating and the second coating have different friction coefficients. The present invention achieves the purpose of automatically removing fine particles on the wall of the heat pipe, can ensure that the equipment to which the invention is applied has reliable heat dissipation for a long time, and can avoid the economic and time problems caused by replacing the heat pipe. Therefore, the application of the invention has the advantages of economy and high work efficiency, and is suitable for remote areas and areas with difficult conditions. The two-dimensional heat pipe that can automatically remove fine particles from the wall of the heat pipe can serve as an efficient and reliable radiator.

Description

Technical Field

[0001] The present invention relates to the energy field including nuclear energy and the field of mechanical equipment, and in particular to a two-dimensional heat pipe and heat exchanger capable of automatically removing particulate matter from the pipe wall. Background Art

[0002] Heat pipes are novel heat transfer components with exceptionally high thermal conductivity. We have developed a wide range of heat pipe products, including air-to-air heat exchangers, air-to-water heat exchangers, waste heat boilers, steam generators, and hot air furnaces. These products have found widespread application in the building materials industry, metallurgy, chemical and petrochemical industries, power engineering, textiles, glass, and electronic and electrical engineering. The heat dissipation efficiency of heat pipes plays a crucial role in today's society.

[0003] The deposition of fine particles in the heat pipe will reduce the heat dissipation efficiency of the heat pipe. The current solutions to this problem are mainly to spray special material coatings (such as polyethylene wax coatings, etc.) on the heat pipe wall and to set small protrusions in the heat pipe. Although the above methods can indeed achieve the purpose of removing fine particles on the heat pipe wall, the current methods still have some shortcomings. For example, the above methods for solving the deposition of fine particles on the heat pipe must rely on the operation of the heat pipe to be realized. When the heat pipe is used again after being unused for a long time, its heat dissipation efficiency is difficult to recover quickly. In addition, the above methods for solving the deposition of fine particles on the heat pipe do not centrally fix the fine particles. The unfixed fine particles will cause damage to the heat pipe wall as the heat transfer liquid evaporates in the heat pipe, destroying the structure designed to remove fine particles on the heat pipe wall and reducing the heat dissipation efficiency of the heat pipe. Summary of the Invention

[0004] In response to the shortcomings of the existing technology, the present invention provides a two-dimensional heat pipe that can automatically remove particles from the pipe wall. By installing a special structural configuration on the traditional two-dimensional heat pipe as a whole, the goal of automatically removing fine particles from the heat pipe wall is achieved.

[0005] The technical solution adopted in the present invention is as follows:

[0006] A two-dimensional heat pipe comprises a heat pipe substrate, wherein the heat pipe substrate comprises a condensing section and an evaporating section, and is characterized in that a protrusion, a first coating, and a second coating are provided on the inner wall of the heat pipe substrate, wherein the second coating is located at the connection between the protrusion and the inner wall and covers a distance of the protrusion along the length direction of the heat pipe, and the first coating is provided on the inner wall and the protrusion surface where the second coating is not provided, and the coating materials of the first coating and the second coating have different friction coefficients.

[0007] The protrusions on the evaporation section of the heat pipe's inner wall create disturbances when the heat transfer fluid vapor passes through them. Each gas disturbance exerts varying forces near the protrusions, helping to remove particles adsorbed on the heat pipe wall. The first and second coatings on the inner wall of the heat pipe, due to their different coefficients of friction, create disturbances when the heat transfer fluid vapor passes through the interface between the two areas. This disturbance dislodges particles adsorbed on the heat pipe wall near this area, facilitating the removal of adsorbed particles.

[0008] A steel wire and iron sheet assembly structure is also provided within the heat pipe base, located in the condensation section. As the thermal fluid vapor condenses, it gradually accumulates on the steel sheet. When the fluid accumulates to a certain level, the gravity of the fluid and the interaction between the fluid and the steel sheet reach a critical state, causing the fluid to separate from the steel sheet. Before the fluid separated from the steel sheet, the interaction between the fluid and the steel sheet caused the steel wire to deform. Now that the fluid has separated from the steel sheet, the structure rapidly recovers, generating vibrations that create waves on the heat pipe wall, facilitating the removal of adsorbed particles.

[0009] An activated carbon adsorption structure is also installed within the heat pipe base; it is located within the evaporation section. When the heat transfer fluid in the two-dimensional heat pipe condenses and flows back to the bottom of the pipe, it flows through the activated carbon. The activated carbon within the activated carbon adsorption structure aggregates and adsorbs particulate matter in the heat pipe to a single location within the structure, preventing large-scale adsorption of particles within the heat pipe.

[0010] A steel wire and steel ball assembly is also provided outside the heat pipe base, which is used to induce the heat pipe base to generate waves when there is external interference. The steel wire and steel ball assembly generates waves when there is external interference, thereby removing particles adsorbed on the heat pipe wall.

[0011] The outer wall of the heat pipe substrate at the junction of the evaporator and condenser sections is provided with a hollow interlayer, within which the steel wire and steel ball structure is housed. This interlayer incorporates a combination of steel wire and steel balls. When external disturbances (such as ground vibrations from nearby construction) occur, the structural equilibrium is disrupted, causing the balls to shift position. This process generates waves on the heat pipe wall, facilitating the removal of adsorbed particles.

[0012] An ultrasonic generator is also provided outside the heat pipe base. The ultrasonic generator is controlled to automatically switch on and off according to time and the working duration of the ultrasonic generator is set. The ultrasonic waves generated during the working period are beneficial to removing particles on the heat pipe wall.

[0013] The first coating is a low-friction coating such as a molybdenum disulfide spray coating or a PTFE coating. Spraying the molybdenum disulfide coating on the inner wall of the heat pipe, thanks to its wear resistance and lubricity, cleans the heat pipe wall and fills pores, pits, scratches, and other microporous defects on the heat pipe surface, effectively reducing the adsorption and deposition of particulate matter in the heat pipe.

[0014] The second coating is a coating with a low friction coefficient, such as a PVD coating or a Teflon coating, but with a different friction coefficient than the first coating. The special coating junction inside the heat pipe refers to a portion of the heat pipe wall in the evaporator section of the heat pipe, where the PVD coating is applied. This structure disturbs the airflow within the heat pipe, thereby removing particulate matter adsorbed on the heat pipe wall.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The first coating inside the heat pipe reduces friction and roughness, thereby reducing the deposition and adsorption of fine particles on the heat pipe wall. The second coating and the small protrusions designed on the heat pipe wall disrupt the gas flow within the heat pipe, reducing the deposition and adsorption of fine particles on the heat pipe wall. The steel wire and iron sheet assembly, the steel wire and steel ball assembly, and the ultrasonic device installed on the heat pipe generate waves to reduce the adsorption and adsorption of fine particles on the heat pipe wall. These multiple structures work together to remove fine particles that have deposited and adsorbed on the heat pipe wall.

[0017] The two-dimensional heat pipe of the present invention can achieve the purpose of controlling and cleaning the fine particles deposited on the wall of the heat pipe, thereby solving the problem that the heat dissipation efficiency of the heat pipe cannot be quickly restored after it has not been used for a long time. At the same time, the present invention can remove the fine particles in the heat pipe and uniformly collect and fix the fine particles in the heat pipe through special structures such as protrusions designed in the heat pipe, two coatings, a steel wire and iron sheet combination structure, and an activated carbon adsorption structure, which can solve the problem that the fine particles moving with the heat transfer fluid damage and destroy the structure designed to remove the fine particles on the wall of the heat pipe. Compared with other solutions, this invention is more reliable and sustainable. Its application in energy fields including nuclear energy and mechanical equipment fields can greatly reduce labor costs and equipment maintenance costs. For example, if it is applied to a small nuclear reactor, its feature of automatically removing fine particles on the pipe wall can ensure the heat dissipation of the small nuclear reactor, and can avoid the economic problem caused by the large amount of manpower and material resources required to replace the heat pipes in the small nuclear reactor due to heat dissipation problems in the small nuclear reactor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 for Figure 1 AA cross-section diagram. DETAILED DESCRIPTION

[0020] The specific embodiments of the present invention are described below with reference to the accompanying drawings.

[0021] like Figure 1 As shown, the two-dimensional heat pipe of the present application includes a heat pipe base 10, which has a condensation section and an evaporation section. A protrusion structure 3, a first coating 5 and a second coating 6 are provided on the inner wall of the heat pipe base 10. The second coating 6 is located at the connection between the protrusion structure 3 and the inner wall and covers a distance of the protrusion structure along the length direction of the heat pipe. The first coating is provided on the inner wall and the surface of the protrusion structure where the second coating is not provided. The coating materials of the first coating and the second coating have different friction coefficients.

[0022] The protrusion structure 3 designed on the inner wall of the heat pipe refers to the construction of tiny protrusions on the wall of the heat pipe in the evaporation section. The protrusion structure 3 is distributed in a ring shape. Figure 2 The tiny protrusions are arc-shaped protrusions with the distance from the bottom to the bottom of the heat pipe being one-tenth of the total length of the heat pipe, and the distance from the top to the bottom of the heat pipe being two-fifths of the total length of the heat pipe. When the heat transfer liquid vapor in the heat pipe passes through this area, disturbances are generated. Each gas disturbance generates different forces near the protrusions, which help to remove particles adsorbed on the heat pipe wall.

[0023] In one embodiment, a steel wire and iron sheet assembly structure 7, constructed by welding steel wire to the heat pipe wall, is further disposed within the heat pipe base. This steel wire and iron sheet assembly structure 7 is located in the condensing section. Steel wire and iron sheet assembly structure 7 refers to a combination of steel wire 71 and steel sheet 72 constructed in the condensing section of the heat pipe, with steel wire 71 welded to the heat pipe wall and steel sheet 72 welded to steel wire 71.

[0024] When the heat transfer liquid vapor condenses, the heat transfer liquid gradually accumulates on the steel sheet 72. When the heat transfer liquid accumulates to a certain level, the gravity of the heat transfer liquid and the interaction force between the heat transfer liquid and the steel sheet reach a critical state, so the heat transfer liquid separates from the steel sheet. Before the heat transfer liquid separates from the steel sheet, the interaction force between the heat transfer liquid and the steel sheet causes the steel sheet and steel wire to deform. Now that the heat transfer liquid is separated from the steel sheet, vibration will be generated when the structure recovers quickly, thereby generating waves on the heat pipe wall, which is conducive to removing tiny particles adsorbed on the heat pipe wall.

[0025] In one embodiment, the first coating 5 is a molybdenum disulfide spray coating, which can achieve the purpose of cleaning the heat pipe wall and filling the pores, pits, scratches and other microporous defects on the surface of the heat pipe wall due to its wear resistance and lubrication properties, and can effectively reduce the adsorption and deposition of particulate matter in the heat pipe.

[0026] In one embodiment, the second coating 6 sprayed on the upper portion of the heat pipe wall protrusion in the evaporator section of the heat pipe is a PVD coating. The second coating spray area is adjacent to the molybdenum sulfide coating spray area. Due to the different friction coefficients of the two coating materials, the heat transfer fluid vapor will be disturbed when passing through the intersection of the two areas. This disturbance can remove particulate matter on the heat pipe wall near this area, which is beneficial for removing particulate matter adsorbed on the heat pipe wall.

[0027] In one embodiment, an activated carbon adsorption structure 4 is further provided in the heat pipe base, and the activated carbon adsorption structure 4 is located in the evaporation section of the heat pipe.

[0028] The activated carbon structure 4 inside the heat pipe is welded to the inner wall of the heat pipe base 10 through the steel mesh 8 at the bottom of the two-dimensional heat pipe, and the activated carbon is embedded between the bottom of the inner wall of the heat pipe base and the interlayer of the steel mesh. When the heat transfer fluid in the two-dimensional heat pipe condenses and flows back to the bottom of the pipe, the heat transfer fluid flows between the activated carbons. The activated carbon embedded in the bottom of the heat pipe can adsorb the fine particles in the heat transfer fluid without affecting the evaporation of the heat transfer fluid. This design can gather the particles in the heat pipe in the same place, thereby preventing the particles from being adsorbed over a large area in the heat pipe.

[0029] In one embodiment, a steel wire and steel ball assembly 2 is further provided outside the heat pipe base. Figure 1 and Figure 2 The steel wire and iron ball structure 2 is reflected. The embedded steel wire and iron ball assembly 2 is set in the hollow interlayer 9 constructed on the outer wall at the junction of the evaporation section and the condensation section of the heat pipe. The steel wire and iron ball assembly 2 constructed in the hollow interlayer 9 is composed of a combination structure of steel wire 21 and steel ball 22, wherein the steel ball 22 is connected to the hollow interlayer 9 by the steel wire 21. When external interference occurs (such as ground vibration caused by nearby construction), the equilibrium state of the structure is destroyed and the position of the steel ball 21 changes. Due to the material properties of the steel wire 22, the steel wire 22 will gradually restore the steel ball 21 to its original position. During this process, the position of the steel ball 21 changes rapidly. During this process, the movement of the steel ball 21 is transmitted through the steel wire 22 to generate waves on the wall of the heat pipe, which is beneficial to remove particles adsorbed on the wall of the heat pipe.

[0030] In one embodiment, an ultrasonic generator 1 is further provided outside the heat pipe base 10 , which is controlled to automatically switch on and off according to time and set the working duration of the ultrasonic generator. The ultrasonic waves generated during the working period are beneficial to removing particles on the heat pipe wall.

[0031] This application addresses the problem in existing heat pipe technology that fine particles are often adsorbed and accumulated on the heat pipe wall, thereby affecting the heat dissipation efficiency of the heat pipe. By improving the traditional two-dimensional heat pipe, specific structures are designed and installed inside the two-dimensional heat pipe. Relying on the combined effect of these structures, the heat pipe can automatically remove fine particles adsorbed and deposited on the heat pipe wall, thereby ensuring the heat dissipation efficiency of the heat pipe.

[0032] This embodiment provides a heat exchanger, which uses the two-dimensional heat pipe in the above embodiment as a heat exchange device to achieve heat dissipation or heat exchange functions.

Claims

1. A two-dimensional heat pipe, comprising a heat pipe base, wherein the heat pipe base comprises a condensing section and an evaporating section, characterized in that: A protrusion, a first coating and a second coating are provided on the inner wall of the heat pipe substrate. The second coating is located at the connection between the protrusion and the inner wall and covers a distance of the protrusion along the length direction of the heat pipe. The first coating is provided on the inner wall and the protrusion surface where the second coating is not provided. The coating materials of the first coating and the second coating have different friction coefficients. A steel wire and iron sheet assembly structure is also provided in the heat pipe substrate, and the steel wire and iron sheet assembly structure is located in the condensation section.

2. The two-dimensional heat pipe according to claim 1, characterized in that An activated carbon adsorption structure is also provided in the heat pipe base, and the activated carbon adsorption structure is located in the evaporation section.

3. The two-dimensional heat pipe according to claim 1, characterized in that: A steel wire and steel ball assembly is also provided outside the heat pipe base, which is used to induce the heat pipe base to generate waves when there is external interference.

4. The two-dimensional heat pipe according to claim 3, characterized in that: A hollow interlayer is provided on the outer wall of the heat pipe base at the junction of the evaporation section and the condensation section, and the steel wire and steel ball structure is provided in the hollow interlayer.

5. The two-dimensional heat pipe according to claim 1, characterized in that: An ultrasonic generator is also arranged outside the heat pipe base.

6. The two-dimensional heat pipe according to claim 1, characterized in that: The first coating is a molybdenum disulfide spray coating or a PTFE coating.

7. The two-dimensional heat pipe according to claim 1, characterized in that: The second coating is a PVD coating or a tetrafluoroethylene coating.

8. A heat exchanger, characterized in that: A two-dimensional heat pipe according to any one of claims 1 to 7.

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