CN112105231A - Pulsating heat pipe type blade server heat management system - Google Patents

Abstract

The invention discloses a thermal management system of a pulsating heat pipe type blade server, comprising an evaporation section, a condensation section and a circulating working medium, the evaporation section is a flat tube; the flat surface of the evaporation section is in contact with the upper surface of the central processing unit of the server, and The evaporation section completely covers the upper surface of the central processing unit; the two ends of the condensation section are connected to both ends of the evaporation section, and the upper part of the condensation section extends out of the chassis of the server; the circulating working medium is filled in the evaporation section and the condensation section, and the The circulating working medium absorbs the heat generated by the central processing unit and vaporizes into steam and flows vertically upward to the condensation section. The circulating working medium in the condensing section transfers heat to the outside to cool down and returns to the evaporation section under the action of its own gravity, forming a self-circulating heat dissipation. Thermal loop structure. The invention utilizes the action of gravity to drive the circulating working medium to return, and can transport heat to the outside of the chassis for release without external energy input, and has the beneficial effects of high heat exchange efficiency, good heat dissipation efficiency and low energy consumption.

Description

A pulsating heat pipe blade server thermal management system

technical field

The invention relates to a thermal management system, in particular to a thermal management system of a pulsating heat pipe type blade server.

Background technique

With the gradual development of information technology, the information industry has higher and higher requirements on the processing capacity and speed of data center processing. Due to the advantages of strong processing capability, the existing blade servers can quickly process a large amount of data; the corresponding blade servers also consume a large amount of power and generate a lot of heat, and the high heat generation of the server becomes the data center. A major hidden danger to safe and smooth operation.

Existing heat dissipation of a blade server mainly uses a cooling device to cool down the indoor temperature of the server, and then blows cold air onto the server through a fan to dissipate heat from the server. Although this method can dissipate heat in a large area at the same time, the heat exchange efficiency is low, the heat dissipation effect is average, and the power consumption is large, resulting in high heat dissipation cost.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a thermal management system of a pulsating heat pipe type blade server with high heat exchange efficiency, good heat dissipation efficiency and low energy consumption in view of the above problems. The system can spontaneously bring the heat generated by the server to the environment outside the chassis by utilizing the action of gravity and the phase change of the pulsating heat pipe, which can replace the fan in the chassis and reduce the cooling consumption in the environment.

Purpose of the present invention can adopt following technical scheme to reach:

A pulsating heat pipe type blade server thermal management system, comprising an evaporation section, a condensation section and a circulating working medium, wherein the evaporation section is a flat tube; the flat surface of the evaporation section is in contact with the upper surface of the central processing unit of the server, and the evaporation section The upper surface of the central processing unit is fully covered; the condensation section is a circular tube, the condensation section is vertically arranged, and the two ends of the condensation section are connected with the two ends of the evaporation section, and the upper part of the condensation section extends out of the chassis of the server; so The circulating working medium is filled in the evaporation section and the condensation section. The circulating working medium in the evaporation section absorbs the heat generated by the central processing unit and vaporizes into steam and flows vertically upward to the condensation section. The circulating working medium in the condensation section transfers heat to the outside. Cool down and return to the evaporation section under the action of its own gravity, forming a self-circulating heat dissipation heat circuit structure.

As a preferred solution, a fan for blowing the condensation section is provided outside the chassis of the server.

As a preferred solution, porous capillaries are arranged in the evaporation section and the condensation section.

As a preferred solution, the evaporation section is installed on the upper surface of the central processing unit of the server through a U-shaped half-ring buckle, the two ends of the U-shaped half-ring buckle are connected to the side surface of the central processing unit, and the evaporation section is inserted Connected to the gap between the upper surface of the central processing unit and the U-shaped half-ring buckle.

As a preferred solution, the circulating working medium is deionized distilled water working medium.

As a preferred solution, the U-shaped half-ring buckle is made of copper.

Implement the present invention, have the following beneficial effects:

1. During operation, the evaporation section is heated and absorbs the heat generated by the central processing unit, the liquid plug becomes shorter, and the steam plug becomes longer, which increases the pressure inside the evaporation section, and the gas-liquid plug moves to the condensation end. When the mass reaches the condensing end, the steam plug becomes shorter after exothermic, condensed into liquid reflux, the pressure of the condensing end decreases, and then the liquid at the condensing end flows back to the evaporation section under the action of its own gravity. The whole process uses gravity to drive the circulating working fluid back, which can transport heat to the outside of the chassis without external energy input, greatly reducing the high-power consumption of the centrifugal fan in the traditional blade server chassis, as well as the dust, noise and localization caused by use. overheating problem.

2. The evaporation section dissipates heat for the central processor and memory of the blade server, and the pulsating heat pipe has a 20%-30% higher heat transfer capacity than ordinary sintered heat pipes and a smaller and more flexible volume. have more advantages.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a thermal management system of a pulsating heat pipe type blade server according to the present invention.

FIG. 2 is a schematic diagram of the internal installation structure of FIG. 1 .

3 is a schematic diagram of the connection structure between the evaporation section of the thermal management system of the pulsating heat pipe type blade server and the central processing unit of the server according to the present invention.

FIG. 4 is a side view of FIG. 3 .

FIG. 5 is a schematic structural diagram of a self-circulating heat dissipation heat loop structure of the thermal management system of the pulsating heat pipe type blade server according to the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Example

1 to 5 , the present embodiment relates to a thermal management system of a pulsating heat pipe type blade server, including an evaporation section 1, a condensation section 2 and a circulating working medium, the evaporation section 1 is a flat tube; the flat surface of the evaporation section 1 is the same as the The upper surface of the central processing unit 10 of the server is in contact with the upper surface of the central processing unit 10, and the evaporation section 1 completely covers the upper surface of the central processing unit 10; the condensation section 2 is a circular tube, the condensation section 2 is vertically arranged, and the two ends of the condensation section 2 are connected to The two ends of the evaporation section 1 are connected, and the upper part of the condensation section 2 extends out of the chassis 11 of the server; the circulating working medium is filled in the evaporation section 1 and the condensing section 2, and the circulating working medium in the evaporation section 1 is absorbed by the central processing unit 10. The heat of the condenser is vaporized into steam and flows vertically upward to the condensation section 2. The circulating working medium in the condensation section 2 transfers heat to the outside to reduce the temperature and returns to the evaporation section 1 under the action of its own gravity, forming a self-circulating heat dissipation heat circuit structure. The evaporation section 1 adopts a flat tube shape, which makes the evaporation section 1 and the central processing unit have a larger contact area, which is beneficial to improve the efficiency and temperature uniformity of heat exchange, and has better heat absorption efficiency than ordinary circular tube evaporators. The vertical section of condensation section 2 accounts for 87.43% of the total length, and its horizontal section adopts arc transition to reduce pressure loss.

During operation, the evaporation section 1 is heated and absorbs the heat generated by the central processing unit 10, the liquid plug becomes shorter, and the steam plug becomes longer, which increases the pressure inside the evaporation section 1, and the gas-liquid plug moves to the condensation end. When the working fluid reaches the condensing end, the steam plug will be shortened after releasing heat, condensed into liquid reflux, the pressure of the condensing end will decrease, and then the liquid at the condensing end will flow back to the evaporation section 1 under the action of its own gravity. The whole process uses gravity to drive the circulating working fluid to return, and the heat can be transported to the outside of the chassis 11 for release without external energy input, which greatly reduces the high power consumption of the centrifugal fan in the traditional blade server chassis, as well as the dust, noise and Local overheating problem.

A fan for blowing the condensation section 2 is arranged outside the chassis of the server, and the heat of the condensable section 2 is transferred to the external environment of the chassis.

Capillary tubes are arranged in the evaporation section 1 and the condensation section 2. The capillary has a large capillary force, which can reduce the flow resistance, make the circulation loop run more efficiently, and ensure the stability of the system operation.

As shown in FIG. 3 and FIG. 4 , the evaporation section 1 is installed on the upper surface of the central processing unit 10 of the server through the U-shaped half-ring buckle 3 , and the two ends of the U-shaped half-ring buckle 3 are connected to the central processing unit 10 . The evaporating section 1 is inserted into the gap 31 between the upper surface of the central processing unit 10 and the U-shaped half-ring buckle 3 , and the U-shaped half-ring buckle 3 is in contact with the evaporation section 1 . The U-shaped half ring buckle 3 is made of copper. During operation, part of the heat absorbed by the evaporation section 1 is transferred to the U-shaped half ring buckle 3, which increases the area of heat dissipation and improves the heat dissipation effect.

The circulating working medium is deionized distilled water working medium. Deionized distilled water has higher latent heat of vaporization and lower viscosity, which can effectively ensure heat transfer efficiency. During low-power heat dissipation, the vertical tubes of condensation section 2 can use the phase-change heat to dissipate heat; when high-power heat dissipation is used, the vaporization of the circulating working medium in evaporation section 1 generates a larger air pressure, which promotes the circulating flow and increases the Heat exchange, improve heat exchange effect and temperature uniformity.

What is disclosed above is only a preferred embodiment of the present invention, and of course it cannot limit the scope of the rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

Claims (6)

1. A pulse heat pipe type blade server heat management system is characterized by comprising an evaporation section, a condensation section and a circulating working medium, wherein the evaporation section is a flat pipe; the flat surface of the evaporation section is in contact with the upper surface of the central processing unit of the server, and the evaporation section completely covers the upper surface of the central processing unit; the condensing section is a circular pipe, the condensing section is vertically arranged, two ends of the condensing section are communicated with two ends of the evaporating section, and the upper part of the condensing section extends out of the case of the server; the circulating working medium is filled in the evaporation section and the condensation section, the circulating working medium of the evaporation section absorbs heat generated by the central processing unit, is vaporized into steam and vertically flows upwards to the condensation section, and the circulating working medium of the condensation section transfers heat outwards to reduce the temperature and flows back to the evaporation section under the action of self gravity to form a self-circulation heat dissipation heat loop structure.

2. The pulsating heat pipe blade server thermal management system of claim 1, wherein a fan is disposed outside the server chassis for blowing the condenser section.

3. A pulsating heat pipe blade server thermal management system as in claim 2, wherein porous capillaries are provided in said evaporator section and condenser section.

4. The pulsating heat pipe blade server thermal management system of claim 3, wherein said evaporator section is mounted on an upper surface of a CPU of the server via a U-shaped half-ring fastener, both ends of said U-shaped half-ring fastener are connected to a side surface of the CPU, and the evaporator section is inserted into a gap between the upper surface of the CPU and the U-shaped half-ring fastener.

5. The pulsating heat pipe blade server thermal management system of claim 4, wherein said cycle fluid is deionized distilled water.

6. A pulsating heat pipe blade server thermal management system as in claim 5, wherein said U-shaped half-ring is made of copper.

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