CN217402505U

CN217402505U - Pulsating heat pipe LED heat dissipation device

Info

Publication number: CN217402505U
Application number: CN202221565509.7U
Authority: CN
Inventors: 商福民; 巨海娇; 刘建红; 阎天海; 杨康喆; 刘超越
Original assignee: Changchun Institute of Applied Chemistry of CAS
Current assignee: Changchun Institute of Applied Chemistry of CAS
Priority date: 2022-06-22
Filing date: 2022-06-22
Publication date: 2022-09-09
Anticipated expiration: 2032-06-22

Abstract

The utility model relates to a pulsation heat pipe LED heat abstractor, including gravity heat pipe, pulsation heat pipe, samming board, radiating fin, LED chip. The gravity heat pipe and the pulsating heat pipe are vertically arranged on the upper surface of the temperature-uniforming plate, the LED chip is arranged in the center of the lower surface of the temperature-uniforming plate, the pulsating heat pipe is of a spiral structure which is formed by bending a copper pipe around the side surface of the gravity heat pipe, the bottom of the pulsating heat pipe is in contact with the upper surface of the temperature-uniforming plate, the inner ring of the pulsating heat pipe structure is in contact with the side surface of the gravity heat pipe, and the outer ring of the pulsating heat pipe is additionally provided with radiating fins. When the LED lamp is used, the gravity heat pipe and the pulsating heat pipe can effectively remove heat generated by the LED chip, reduce the junction temperature of the LED chip, ensure the normal work of the LED chip and prolong the service life of the LED lamp. The pulsating heat pipe is used as an efficient heat transfer element, has simple structure and light weight, can quickly realize heat removal, is used for the field of heat dissipation of electronic components, and has the characteristics of simple structure, convenient installation, no need of external power and the like.

Description

Pulsating heat pipe LED heat dissipation device

Technical Field

The utility model belongs to the technical field of electronic components heat dissipation, especially, relate to a pulsating heat pipe LED heat abstractor.

Background

As a fourth generation lighting, LEDs have the advantages of high reliability, fast response, good practicability, etc., and are currently widely used in indoor and outdoor lighting. With the gradual development of high-brightness and high-power LED chip technology, the heat dissipation problem is needed to be solved. The main reason for the heat generation of the LED is that the photoelectric conversion efficiency is low, the light extraction efficiency of the LED only can reach about 20%, a large amount of electric energy is converted into heat, the heat can not be timely dissipated to cause heat accumulation, the rising of the junction temperature of the LED chip can influence the luminous flux, the radiation wavelength and the like, the luminous efficiency and the service life of the chip of the LED are reduced, and the LED lamp bead can be damaged even in severe cases. It is therefore of interest to investigate how to remove the heat accumulated on the surface of the LED chip.

The existing LED radiators are mostly rib radiators and fin group radiators, the main defects of the rib radiators are that the temperature is lower and lower along the rib height direction, the heat exchange effect is poor, and the main defects of the fin radiators are that the heat transfer speed is slow, the air side flow resistance is large, and the heat dissipation performance is poor. The pulsating heat pipe has the characteristics of simple and flexible structure, no need of a capillary core, simple manufacture, unlimited heating position (the bottom of the common gravity heat pipe needs to be heated), excellent heat transfer performance and the like, and has good development prospect in the aspect of heat dissipation.

The utility model discloses a combine together to constitute a heat abstractor with pulsation heat pipe, radiating fin and gravity heat pipe are ingenious, utilize this heat abstractor to get rid of the heat that the LED chip produced, and then guarantee that LED can normally work, improve LED life.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a pulsation heat pipe LED heat abstractor, combines pulsation heat pipe and gravity heat pipe, can get rid of the heat that the LED chip produced effectively, reduces LED chip junction temperature, guarantees that the LED chip normally works, improves LED lamps and lanterns life, and this technical scheme has characteristics such as simple structure, installation are convenient, need not plus power.

The utility model discloses a realize that the technical scheme that its technical purpose adopted does:

a pulsating heat pipe LED heat dissipation device comprises a gravity heat pipe, a pulsating heat pipe, heat dissipation fins, a temperature-equalizing plate and an LED chip.

The gravity heat pipe and the pulsating heat pipe are vertically arranged on the upper surface of the temperature-uniforming plate, and the LED chip is arranged in the center of the lower surface of the temperature-uniforming plate;

the pulsating heat pipe is formed by bending a copper pipe around the side surface of the gravity heat pipe into a spiral structure, and the bottom of the pulsating heat pipe is in contact with the upper surface of the temperature-equalizing plate; the inner ring of the pulsating heat pipe is in contact with the side surface of the gravity heat pipe, and the outer ring of the pulsating heat pipe is wound with radiating fins;

the gravity heat pipe is formed by vacuumizing the inside of a pipe shell, then filling a proper amount of working liquid, and then sealing, wherein the diameter of the gravity heat pipe is 44 mm, and the height of the gravity heat pipe is 80 mm;

the pulsating heat pipe is a copper pipe which is connected end to end and filled with a certain amount of deionized water after being vacuumized; the radiating fins are in a spiral winding shape, the overall structure diameter of the fins is 240 mm, and the height of the fins is 90 mm;

the LED chip, the gravity heat pipe, the pulsating heat pipe and the temperature-equalizing plate are fixed into an integral structure through connecting bolts.

The utility model discloses utilize the pulsating heat pipe for heat transfer element, take away the heat that the LED chip produced, this technical scheme has characteristics such as simple structure, installation are convenient, need not external power, and its advantage is:

(1) the LED lamp can effectively remove heat generated by the LED chip, ensure the normal work of the LED lighting chip and prolong the service life of the LED lamp.

(2) The pulsating heat pipe is used as an efficient heat transfer element, has a simple structure, is easy to bend, can quickly realize heat removal, and is used for heat dissipation of electronic components.

Drawings

Fig. 1 is an overall schematic diagram of a pulsating heat pipe LED heat dissipation device of the present invention;

fig. 2 is a schematic structural view of a pulsating heat pipe of the pulsating heat pipe LED heat dissipation device of the present invention;

fig. 3 is a top view of a pulsating heat pipe structure of a pulsating heat pipe LED heat dissipation device of the present invention;

in the figure, 1-gravity heat pipe, 2-pulsation heat pipe, 3-temperature equalizing plate, 4-radiating fin and 5-LED chip.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model discloses a pulsation heat pipe LED heat abstractor, as shown in figure 1, 2, 3, include: the device comprises a gravity heat pipe 1, a pulsating heat pipe 2, a temperature-equalizing plate 3, a radiating fin 4 and an LED chip 5; the gravity heat pipe 1 and the pulsating heat pipe 2 are vertically arranged on the upper surface of the temperature-uniforming plate 3, the LED chip 5 is arranged at the center of the lower surface of the temperature-uniforming plate 3, the pulsating heat pipe 2 is formed by bending a copper pipe into a spiral structure around the outer surface of the gravity heat pipe 1, the inner ring of the pulsating heat pipe 2 is in contact with the outer surface of the gravity heat pipe 1, and the outer ring of the pulsating heat pipe 2 is wound with the radiating fin 4.

When the LED chip 5 works, a large amount of heat is generated, the temperature equalizing plate 3 quickly transfers the heat to the gravity heat pipe 1 and the pulsating heat pipe 2, the gravity heat pipe 1 not only can dissipate the heat by itself, but also can transfer the heat to the pulsating heat pipe 2 in contact with the side surface of the gravity heat pipe 1, the heat is used as a heat source of an evaporation end of the pulsating heat pipe 2, and the pulsating heat pipe 2 transfers the heat to an outer ring in contact with air and a condensation end at the top; the pulsating heat pipe 2 provides an integral driving force by means of pressure difference generated by alternate evaporation expansion and condensation contraction of internal deionized water and imbalance of pressure difference between adjacent pipes, and the transfer of latent heat and sensible heat is realized through self-oscillation of a vapor plug and a liquid plug in a capillary flow channel.

Compared with the existing LED radiator, the pulsating heat pipe LED radiating device provided by the utility model has simple structure, is easier to realize miniaturization and integration, and can be started quickly; in the whole heat dissipation structure and the air convection heat transfer process, the heat dissipation area is large, the heat transfer is more sufficient, the heat dissipation efficiency of the LED chip is effectively improved, meanwhile, the cost of the heat dissipation device can be reduced, the commercial production is facilitated, the heat dissipation device can be widely applied to cooling of high-power electronic devices and equipment, and the service life of the LED is greatly prolonged.

Claims

1. A pulsating heat pipe LED heat sink comprising: the device comprises a gravity heat pipe (1), a pulsating heat pipe (2), a temperature-equalizing plate (3), radiating fins (4) and an LED chip (5); the method is characterized in that: the gravity heat pipe (1) and the pulsation heat pipe (2) are vertically arranged on the upper surface of the temperature-uniforming plate (3), and the LED chip (5) is arranged at the center of the lower surface of the temperature-uniforming plate (3).

2. The pulsating heat pipe LED heat dissipation device of claim 1, wherein: the pulsating heat pipe (2) is surrounded by a copper pipe, the outer surface of the gravity heat pipe (1) is bent into a spiral structure, the inner ring of the pulsating heat pipe (2) is in contact with the outer surface of the gravity heat pipe (1), and the outer ring of the pulsating heat pipe (2) is wound with the radiating fins (4).

3. The pulsating heat pipe LED heat sink of claim 1, wherein: the gravity heat pipe (1) is formed by vacuumizing the interior of the pipe shell, filling a proper amount of working liquid, and sealing, wherein the diameter is 44 mm, and the height is 80 mm.

4. The pulsating heat pipe LED heat sink of claim 1, wherein: the pulsating heat pipe (2) is a copper pipe which is connected end to end and filled with a certain amount of deionized water after being vacuumized; the radiating fins (4) are in a spiral winding shape, the overall structure diameter of the fins is 240 mm, and the height of the fins is 90 mm.

5. The pulsating heat pipe LED heat dissipation device of claim 1, wherein: the LED chip (5), the gravity heat pipe (1), the pulsating heat pipe (2) and the temperature-uniforming plate (3) are fixed into an integral structure through connecting bolts.