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CN-114111408-B - Flat pulsating heat pipe and processing method using same

CN114111408BCN 114111408 BCN114111408 BCN 114111408BCN-114111408-B

Abstract

The invention discloses a flat pulsating heat pipe, which comprises a flat pipe and two end plates, wherein the interior of the flat pipe is provided with channels which are parallel to each other, the number of the channels is 4-50 and the number of the channels is even, the end plates are positioned at the two ends of the flat pipe, the pipelines in the flat pipe are connected in series to form a single flow channel, one end plate is provided with a process hole, and a sealing structure is arranged at the process hole; the hydraulic diameter of the internal channel of the flat tube is 0.3-4 mm, the partition wall of the internal channel of the flat tube is grooved inwards from the port, the grooving depth is not more than 20mm and not less than 1mm, grooves are formed at the two ends of the partition wall at intervals respectively, an internal hollow structure is arranged at the joint of the end plate with the process hole and the flat tube and is inserted into the flat tube, the insertion distance is not less than 1mm, the hydraulic diameter of the internal channel of the flat tube is 0.3-4 mm, the flat tube is designed, the end plate can be directly manufactured into the heat collecting end of the flat pulsating heat tube according to requirements, the end plates with different thicknesses are adopted according to the difference of heat productivity, the end plate is fully contacted with the outer surface of the flat tube, the contact thermal resistance is reduced, and the advantages of the pulsating heat tube are better played.

Inventors

  • WEI HUI

Assignees

  • 苏州图卡节能科技有限公司
  • 苏州图卡节能科技有限公司

Dates

Publication Date
20260421
Application Date
20220106
Priority Date
20220106

Claims (8)

  1. 1. A flat pulsating heat pipe is characterized by comprising a flat pipe and two end plates, wherein the interior of the flat pipe is provided with channels which are parallel to each other, the number of the channels is 4-50 and is even, the end plates are positioned at two ends of the flat pipe to connect the internal pipelines of the flat pipe in series into a single flow channel, a process hole is formed in one end plate, a sealing structure is arranged at the process hole, the hydraulic diameter of the internal channel of the flat pipe is 0.3-4 mm, a partition wall of the internal channel of the flat pipe is inwards grooved from a port, the grooving depth is not more than 20mm and not less than 1mm, grooves are respectively formed at two ends at intervals, the joint of the end plate with the process hole and the flat pipe is provided with an internal hollow structure, and the end plate is inserted into the flat pipe, and the insertion distance is not less than 1mm; The end plate provided with the process holes is a single part and comprises a sinking plane, the sinking plane is used for being connected with the end face of the flat and straight pipe, the distance between the sinking plane and the opening surface of the end plate is not less than 3mm, two hollow bulges are arranged on the sinking plane, the distance between the bulges and the root is higher than 1mm, the outer edges of the two bulges are inserted into the channel of the flat and straight pipe, and the two inner pipelines of the bulges are connected inside the end plate and open outside the end plate; Or the end plate provided with the process holes is a component and comprises a component body, three process pipes, the component body comprises a sinking plane, the sinking plane is used for being connected with the end face of the straight flat pipe, the distance between the sinking plane and the opening surface of the end plate is not less than 3mm, two process holes are formed in the sinking surface, the two process pipes are respectively arranged between the two process holes and fixed in a welding or bonding mode, the two process pipes are higher than the sinking plane of the component body when assembled, the distance between the two process pipes is higher than 2mm, and the two process pipes are communicated with a third process pipe outside the component body and used for vacuumizing and filling heat pipe working media when the flat pulsating heat pipe is manufactured.
  2. 2. The flat pulsating heat pipe of claim 1, wherein the end plate without the process hole is a single part and comprises a sinking plane, the distance between the sinking plane and the opening surface of the end plate is not less than 3mm, the distance between the sinking plane and the opening surface of the end plate is not more than 50mm, the sinking plane is used for being connected with the end surface of the flat pipe, and the peripheral surface of the sinking plane is used for being connected with the outer wall of the flat pipe.
  3. 3. The flat pulsating heat pipe of claim 1, wherein the end plates and the flat pipes are connected by brazing or fixedly connected by weather-proof colloid.
  4. 4. A flat pulsating heat pipe as claimed in any of claims 1 to 3, wherein a part of the large surface of the flat pulsating heat pipe is bonded to the heat generating surface and another part of the large surface of the flat pulsating heat pipe is bonded to the heat dissipating surface.
  5. 5. A flat plate type heat exchanger is characterized in that a plurality of flat plate type pulsating heat pipes according to any one of claims 1-3 are arranged side by side in the direction perpendicular to the plane of the flat and flat pipes, and fins are arranged between the planes of the flat and flat pipes.
  6. 6. A flat pulsating heat pipe radiator is characterized in that a plurality of flat pulsating heat pipes according to any one of claims 1-3 are arranged side by side in the direction perpendicular to the plane of the flat pipes, heat collecting plates are arranged between the planes of the flat pipes at one end of the parallel passage direction, and fins are arranged between the planes of the flat pipes at the other end of the parallel passage.
  7. 7. The flat pulsating heat pipe radiator of claim 6, wherein the heat collecting plate is manufactured by extrusion molding process, and the distance between the extrusion inner wall surface of the opening and the contact surface of the flat pulsating heat pipe is less than 1mm.
  8. 8. A method for processing a flat pulsating heat pipe as claimed in claim 1, wherein the number of channels in the flat pipe is not less than 4 and not more than 50, the channels are relatively parallel to each other, the hydraulic diameter of the channels in the flat pipe is 0.3-4 mm, the partition wall of the channels in the flat pipe is grooved inwards from the port, the grooving depth is not more than 50mm and not less than 3mm, the grooving is respectively carried out at intervals, one end of the flat pipe is sealed by crimping, welding or cementing after grooving, then the other end of the flat pipe is subjected to vacuum operation, the working medium of the heat pipe is filled after vacuum, the filling amount of the working medium is 20% -80% of the mass of the liquid working medium of the content volume of the heat pipe, and the other end is sealed by crimping, welding or cementing after the working medium of the heat pipe is filled.

Description

Flat pulsating heat pipe and processing method using same Technical Field The invention relates to the technical field of heat exchange application, in particular to a flat pulsating heat pipe and a processing method for the flat pulsating heat pipe. Background In transportation, aerospace and industrial processes, it is often necessary to heat or cool equipment systems or working media. Pulsating heat pipes, also known as oscillating heat pipes or self-oscillating heat pipes, have been proposed for the first time by scholars Akachi since 1990, and have been in the past for over twenty years, with potentially high heat exchange effects and lower manufacturing costs becoming the current focus of research. Patent CN203148276U describes a parallel flow pulsating heat pipe, a serpentine arrangement is adopted, patent CN203215636 proposes adding fins between the parallel flow pulsating heat pipes to enhance heat dissipation, patent CN112964104a proposes a heat pipe heat exchanger, also serpentine arrangement, the serpentine pulsating heat pipe tends to require longer flat pipes in manufacturing compared with the traditional parallel flow heat exchanger, especially when a larger heat radiator is applied, such as a serpentine pulsating heat pipe with a length of two meters, the length of a single pulsating pipeline tends to reach 80 meters or even hundreds of meters, the system running resistance is large, large circulation is often not formed, but oscillation running of a hot zone and a cold zone is formed, and the heat dissipation effect of the pulsating heat pipe is reduced. In addition, the above patent describes unclear how to connect the inner pipelines of the parallel pipes in series to form a single flow passage, and the implementation is difficult, which also hinders the large-scale market application of the parallel flow pulsating heat pipe. Meanwhile, when the heat pipe is used as a radiator, the end face of the serpentine pulse heat pipe is a curved surface, fins cannot be added in the curved surface to enhance heat exchange, the curved surface of the heat pipe is not easy to be in close contact with a heating body, and the heat exchange energy of the pulse heat pipe is high, so that the contact thermal resistance of the end face greatly influences the performance of the heat pipe. Disclosure of Invention The invention mainly solves the technical problem of providing a flat pulsating heat pipe, which comprises a flat and flat pipe and two end plates, wherein the interior of the flat and flat pipe is provided with channels which are parallel to each other, the number of the channels is 4-50 and the channels are even, the end plates are positioned at the two ends of the flat and flat pipe to connect the internal pipelines of the flat and flat pipe in series into a single flow channel, a process hole is arranged on one end plate and is used for extracting vacuum and injecting working medium of the heat pipe, a sealing structure is arranged after the working medium is completely filled in the process hole, the hydraulic diameter of the internal channel of the flat and flat pipe is 0.3-4 mm, the partition wall of the internal channel of the flat and flat pipe is grooved inwards from a port, the grooving depth is not more than 20mm and not less than 1mm, the two ends are respectively grooved at intervals, the joint of the end plate with the process hole and the flat and flat pipe are provided with internal hollow structures, and the insertion distance is not less than 1mm. Preferably, the end plate for leading out the process hole is a single part and comprises a sinking plane, the sinking plane is used for being connected with the end face of the flat pipe, the distance between the sinking plane and the opening surface of the end plate is not less than 3mm, two hollow bulges are arranged on the sinking plane, the distance between the bulges and the root is higher than 1mm, the outer edges of the two bulges are inserted into the channel of the flat pipe, and the inner pipelines of the two bulges are connected inside the end plate and open outside the end plate. Preferably, the end plate for leading out the process hole is a component and comprises a component body, three process pipes, the component body comprises a sinking plane, the sinking plane is used for being connected with the end face of the straight flat pipe, the distance between the sinking plane and the opening surface of the end plate is not less than 3mm, two process holes are formed in the sinking surface, the two process pipes are respectively arranged between the two process holes and fixed in a welding or bonding mode, the two process pipes are higher than the sinking plane of the component body when assembled, the distance between the two process pipes is higher than 2mm, and the two process pipes are communicated with a third process pipe outside the component body and are used for vacuumizing and filling working media of the flat pulsat