阅读说明：本技术 一种无动力相变散热装置 (Unpowered phase change heat abstractor ) 是由 韩大峰 刘铁军 刘丹 于 2021-07-30 设计创作，主要内容包括：本发明公开一种无动力相变散热装置,包括散热器、汽化输送管道、冷凝器、冷凝回流管道形成循环通道,供内部的相变介质循环运动；散热器和冷凝器分别包括若干组并排布置的单向导通管路；每组单向导通管路包括至少三个首尾对接的特斯拉阀,特斯拉阀具有单向导通、反相阻挡的效果,相变介质只能单向运动。散热器吸收热源的热量,使其内部的液体汽化形成汽体,汽体经过汽化输送管道进入冷凝器,在冷凝器散发热量,汽体冷凝形成液体,冷凝的液体经过冷凝回流管道进入散热器；本发明利用相变介质的相态改变产生压强变化,使相变介质形成单向循环运动,不断地将散热器的热量向冷凝器输送,不需要借助其他的外部动力源,实现节能降噪。(The invention discloses an unpowered phase change heat dissipation device, which comprises a heat radiator, a vaporization conveying pipeline, a condenser and a condensation backflow pipeline, wherein a circulation channel is formed for the internal phase change medium to circularly move; the radiator and the condenser respectively comprise a plurality of groups of one-way conduction pipelines which are arranged side by side; each group of one-way conduction pipelines comprises at least three tesla valves which are butted end to end, the tesla valves have the effects of one-way conduction and reverse blocking, and the phase change medium can only move in one way. The radiator absorbs the heat of the heat source to vaporize the liquid in the radiator to form vapor, the vapor enters the condenser through the vaporization conveying pipeline, the heat is emitted in the condenser, the vapor is condensed to form liquid, and the condensed liquid enters the radiator through the condensation backflow pipeline; the invention utilizes the phase change of the phase change medium to generate pressure intensity change, so that the phase change medium forms unidirectional circulation motion, the heat of the radiator is continuously transmitted to the condenser, other external power sources are not needed, and energy conservation and noise reduction are realized.)

1. The unpowered phase change heat dissipation device is characterized by comprising a heat radiator (1) and a condenser (2), wherein a vaporization conveying pipeline (3) and a condensation return pipeline (4) are arranged between the heat radiator (1) and the condenser (2);

the radiator (1) and the condenser (2) respectively comprise a plurality of groups of one-way conduction pipelines which are arranged side by side; each group of the one-way conduction pipelines comprises at least three Tesla valves (5) which are butted end to end;

the heat radiator (1) is used for absorbing heat of a heat source, a phase change medium in the heat radiator is vaporized to form steam, the steam enters the condenser (2) through the vaporization conveying pipeline (3), the condenser (2) emits heat, the steam is condensed to form liquid, and the condensed liquid enters the heat radiator (1) through the condensation backflow pipeline (4).

2. The unpowered phase change heat dissipating device according to claim 1, wherein the one-way conducting pipe is a shell-shaped pipe, and the inner wall and the outer wall have the same shape.

3. The unpowered phase change heat dissipation device according to claim 1, wherein the heat sink (1) and the condenser (2) are metal cuboids, and the one-way conduction pipeline is a channel with a hollowed inside.

4. The unpowered phase change heat dissipating device according to any one of claims 1 to 3, wherein two Tesla valves (5) adjacent to the one-way conduction pipeline are parallel and coplanar or perpendicularly crossed with each other.

5. The unpowered phase change heat sink according to claim 4, wherein the heat sink (1) and the condenser (2) are made of copper or aluminum.

6. The unpowered phase change heat dissipating device according to claim 4, wherein the outer surfaces of the heat sink (1) and the condenser (2) are provided with heat dissipating fins.

7. The unpowered phase change heat dissipating device of claim 4 wherein the phase change medium is an electronic fluorinated liquid.

Technical Field

The invention relates to the technical field of refrigeration and heat dissipation, in particular to an unpowered phase change heat dissipation device.

Background

The electronic device has a certain working temperature range, and when the product temperature exceeds the working temperature range of the electronic device, the performance of the electronic device is attenuated, even the electronic device fails. Electronic devices are generally classified into four levels according to temperature adaptability and reliability: the commercial grade is 0-70 ℃; the industrial grade is-40 ℃ to 85 ℃; the turning specification grade is-40 ℃ to 120 ℃; the military grade is-55-150 ℃.

With the continuous development of electronic technology, people have higher and higher demands on computing power. For electronic products, higher operation speed means more heat dissipation requirements, and the heat dissipation methods of the existing electronic products are classified into the following methods:

naturally radiating: for electronic products with small self heat productivity and low working environment temperature, the electronic devices can be ensured to work in a normal temperature range all the time by heat exchange between the electronic devices and the surrounding environment only through a natural heat dissipation mode, and a heat dissipation device does not need to be equipped independently. The natural heat dissipation has insufficient heat dissipation capability, and can only meet the heat dissipation requirements of common low-power-consumption electronic products.

Air cooling and heat dissipation: the heat sink is usually mounted on the heat generating device, and the heat conducted from the heat generating device to the heat sink is taken away through air circulation, so as to achieve the purpose of cooling the device. The air cooling device can be additionally provided with a fan so as to accelerate the circulation of air flow and take away heat more quickly. Air cooling and heat dissipation need to design an air channel inside a product, and the sufficient space and smooth air flow of the air channel are ensured; the additional fan has the disadvantages of noise, limited service life of rotating parts, difficult dustproof and waterproof design and the like.

Liquid cooling and heat dissipation: the liquid cooling heat dissipation is divided into common liquid cooling heat dissipation and common phase change liquid cooling heat dissipation.

Ordinary liquid cooling heat dissipation: the heat dissipation method is similar to the air cooling heat dissipation method, a closed circulating system is formed by a radiator, a cooler, a pipeline and a liquid pump, and the liquid pump drives heat dissipation liquid (usually water or oil with larger specific heat) to flow through the interior of the radiator, so that heat conducted to a heat dissipation fin by a heating device is taken away, and the purpose of cooling the device is achieved; the heat dissipation liquid continuously flows through the cooler for cooling and flows back to the radiator, thereby continuously circulating and taking away the heat dissipated by the electronic device. The common liquid cooling heat dissipation needs a liquid pump, belongs to a rotating part and has limited service life; the heat dissipation liquid does not have phase change, only absorbs heat and takes away the heat, and the heat dissipation efficiency is not high.

Ordinary phase change liquid cooling heat dissipation: the electronic product mainboard is wholly immersed in the insulating refrigerating fluid in a closed space. The boiling point of this insulating refrigerant fluid is well within the normal operating temperature range of the electronic device. When the electronic device generates heat, the refrigerant liquid absorbs heat to reach a boiling point, the vaporized refrigerant liquid gas rises to the top of the closed space to be cooled (the top of the closed space is at the ambient temperature or is provided with a separate condensing device) and then turns into liquid again to fall back to the bottom, and therefore the highest temperature of the electronic device is always not higher than the boiling point temperature of the refrigerant liquid. The common phase-change liquid cooling heat dissipation scheme has the defects of high requirement on the airtight design of a case, large volume, large demand of refrigerating fluid, very high cost, inconvenient maintenance and the like.

At present, a mainstream heat dissipation mode needs to drive a heat dissipation medium to circulate by means of power equipment, and for a person skilled in the art, how to realize medium transmission without the aid of external power is a technical problem to be solved at present.

Disclosure of Invention

The invention provides an unpowered phase change heat dissipation device, which realizes cooling and heat dissipation by circulating a phase change medium without other external power, and the specific scheme is as follows:

an unpowered phase change heat dissipation device comprises a heat radiator and a condenser, wherein a vaporization conveying pipeline and a condensation return pipeline are arranged between the heat radiator and the condenser;

the radiator and the condenser respectively comprise a plurality of groups of one-way conduction pipelines which are arranged side by side; each group of the one-way conduction pipelines comprises at least three Tesla valves in end-to-end butt joint;

the radiator is used for absorbing heat of a heat source to enable the phase change medium in the radiator to be vaporized to form steam, the steam enters the condenser through the vaporization conveying pipeline, the condenser radiates the heat, the steam is condensed to form liquid, and the condensed liquid enters the radiator through the condensation backflow pipeline.

Optionally, the one-way conduction pipeline is a shell-shaped pipeline, and the inner wall and the outer wall have the same shape.

Optionally, the radiator and the condenser are metal cuboids, and the one-way conduction pipeline is a channel with a hollowed inside.

Optionally, two adjacent tesla valves of the one-way conduction pipeline are parallel and coplanar or mutually and perpendicularly crossed.

Optionally, the heat sink and the condenser are made of copper or aluminum.

Optionally, the external surfaces of the radiator and the condenser are provided with radiating fins.

Optionally, the phase change medium is an electronic fluorinated liquid.

The invention provides an unpowered phase change heat dissipation device, which comprises a heat radiator, a vaporization conveying pipeline, a condenser and a condensation backflow pipeline, wherein a circulation channel is formed for the internal phase change medium to circularly move; the radiator and the condenser respectively comprise a plurality of groups of one-way conduction pipelines which are arranged side by side; each group of one-way conduction pipelines comprises at least three tesla valves which are butted end to end, the tesla valves have the effects of one-way conduction and reverse blocking, and the phase change medium can only move in one way. The radiator absorbs the heat of the heat source to vaporize the liquid in the radiator to form vapor, the vapor enters the condenser through the vaporization conveying pipeline, the heat is emitted in the condenser, the vapor is condensed to form liquid, and the condensed liquid enters the radiator through the condensation backflow pipeline; the invention utilizes the phase change of the phase change medium to generate pressure intensity change, so that the phase change medium forms unidirectional circulation motion, the heat of the radiator is continuously transmitted to the condenser, other external power sources are not needed, and energy conservation and noise reduction are realized.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is an overall structure diagram of the unpowered phase change heat dissipating device provided by the present invention;

FIG. 2 is a schematic structural diagram of a set of unidirectional pipelines;

FIG. 3 is a schematic diagram of a single Tesla valve configuration;

FIG. 4 is a schematic diagram of the movement of the internal medium in the conducting direction;

fig. 5 is a schematic view of the movement of the medium inside in the cut-off direction.

The figure includes:

the device comprises a radiator 1, a condenser 2, a vaporization conveying pipeline 3, a condensation return pipeline 4 and a Tesla valve 5.

Detailed Description

The core of the invention is to provide an unpowered phase change heat dissipation device, which realizes cooling and heat dissipation by circulating a phase change medium without other external power.

In order to make those skilled in the art better understand the technical solution of the present invention, the unpowered phase change heat dissipating device of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Fig. 1 is a schematic diagram of an overall structure of a non-powered phase change heat dissipation device according to the present invention, in which arrows indicate the flowing direction of a phase change medium; the unpowered phase change heat dissipation device comprises a heat radiator 1, a condenser 2, a vaporization conveying pipeline 3, a condensation backflow pipeline 4 and other structures, all the components are communicated with one another and keep sealed during working, a phase change medium is filled in the heat dissipation device, and heat is transferred by the phase change medium.

A vaporization conveying pipeline 3 and a condensation return pipeline 4 are arranged between the radiator 1 and the condenser 2, and the radiator 1, the vaporization conveying pipeline 3, the condenser 2 and the condensation return pipeline 4 are sequentially arranged according to the flow scheme of the phase-change medium; the heat sink 1 is disposed at a position of a heat generating component to absorb heat, and the condenser 2 is used to dissipate heat to the outside of the system.

Referring to fig. 1, the radiator 1 and the condenser 2 of the present invention respectively include a plurality of sets of unidirectional conducting pipelines arranged side by side, each set of unidirectional conducting pipelines including at least three tesla valves 5 in end-to-end abutment; FIG. 2 is a schematic structural diagram of a set of unidirectional pipelines, in which arrows indicate the flowing direction of the phase-change medium; the one-way conduction pipeline only allows the phase change medium to move in one direction, namely from left to right in fig. 2, and the phase change medium cannot move in the opposite direction.

The Tesla valve is a passive one-way conducting valve with a fixed geometric shape, can enable fluid to flow in one direction, has a fixed geometric shape, overcomes the defect that the traditional valve is easy to damage due to the fact that a movable part is needed, and can replace a movable valve. Because the fluid has inertia, the flow resistance is different when the fluid passes through the valve in different directions, so that the one-way circulation is realized, and the combined channel is called as a Tesla valve.

Fig. 3 is a schematic view of the structure of a single tesla valve 5; the principle of the tesla valve is explained in connection with fig. 4 and 5, fig. 4 being a schematic view of the medium inside moving in the conducting direction;

fig. 5 is a schematic view of the movement of the medium inside in the cut-off direction.

With reference to fig. 4, when the fluid is flowing in the forward direction through the tesla valve, i.e. the fluid flows in from the left side and flows out from the right side of the tesla valve, the fluid is separated at a, one part of the fluid reaches B through the straight path between a and B, and the other part of the fluid reaches B through the circular path between a and B; the two flows flowing along the straight path and the circular arc path meet at the point B, the included angle of the flow directions is an acute angle, the flow directions are basically the same, and therefore the two flows can be combined together to form a flow and smoothly flow out from the right side of the Tesla valve.

Referring to fig. 5, when the fluid reversely passes through the tesla valve, that is, the fluid flows in from the right side of the tesla valve, the fluid is separated at B, one part of the fluid reaches a through the circular arc path between B and a, the other part of the fluid reaches a through the straight path between a and B, the two fluids meet at a point a, the fluid flowing along the circular arc path has a component towards the right side, the two fluids have similar mass and almost opposite flow directions, and the kinetic energy is cancelled, so that most of the fluid cannot flow out from the left side of the tesla valve, and only a small amount of the fluid can flow out from the left side.

A single tesla valve cannot realize complete one-way stop, but a plurality of tesla valves are connected in series to have good one-way stop performance, so that each one-way conduction pipeline comprises more than three tesla valves 5 which are in end-to-end butt joint, and the performance of one-way conduction stop is ensured. The plurality of one-way conduction pipelines are mutually arranged and connected in parallel to form a radiator 1 and a condenser 2. The number of tesla valves 5 contained in each one-way conduction pipeline in the radiator 1 is equal, and the number of tesla valves 5 contained in each one-way conduction pipeline in the condenser 2 is equal, so that the one-way conduction pipelines in each group have the same passing capacity.

The conduction directions of the one-way conduction pipelines contained in the radiator 1 are the same, the conduction directions of the one-way conduction pipelines contained in the condenser 2 are the same, and the conduction directions are reasonably arranged, so that the internal medium flows along the directions of the radiator 1, the vaporization conveying pipeline 3, the condenser 2 and the condensation backflow pipeline 4.

The outlet ends of the one-way conduction pipelines in the radiator 1 are in butt joint conduction with the vaporization conveying pipeline 3, the inlet ends of the one-way conduction pipelines in the condenser 2 are in butt joint conduction with the vaporization conveying pipeline 3, the outlet ends of the one-way conduction pipelines in the condenser 2 are in butt joint conduction with the condensation backflow pipeline 4, and the inlet ends of the one-way conduction pipelines in the radiator 1 are in butt joint conduction with the condensation backflow pipeline 4.

The radiator 1 is close to a heating element, the radiator 1 is used for absorbing heat of a heat source to enable a phase change medium in the radiator 1 to be vaporized to form steam, the volume of the vaporized medium is increased, the pressure in the radiator 1 is increased to form a high-pressure area, the radiator 1 only allows the medium to flow in a single direction, and the steam medium in the radiator 1 of the high-pressure area continuously enters the condenser 2 through the vaporization conveying pipeline 3; the heat is radiated from the condenser 2, the vapor is condensed to form liquid, the volume is reduced after the medium is condensed, the pressure intensity is reduced to form a low-pressure area, the condenser 2 is only conducted in one direction and cannot reversely flow back, and therefore the liquid medium after condensation and liquefaction enters the radiator 1 through the condensation return pipeline 4 to be circulated again.

The unpowered phase change heat dissipation device adopts a plurality of Tesla valves 5 which are connected in series to form a one-way conduction pipeline, a plurality of one-way conduction pipelines are connected in parallel to form a heat radiator 1 and a condenser 2, and the characteristic of one-way conduction is utilized to enable a phase change medium to flow in a one-way circulation mode inside, absorb heat in the heat radiator 1 and release heat in the condenser 2, so that heat is absorbed and discharged continuously, and the effects of cooling are achieved.

Besides the advantage of one-way fluid communication, the tesla valve has another advantage that the internal geometry is relatively complex, so that more contact areas are available for the phase-change medium to fully contact the inner wall of the tesla valve when flowing through the tesla valve, thereby greatly improving the heat absorption efficiency of the tesla valve radiator and the heat release efficiency of the tesla valve condenser.

And because the radiator 1, the vaporization conveying pipeline 3, the condenser 2 and the condensation return pipeline 4 are not internally provided with movable parts, the probability of damage can be reduced to the greatest extent.

On the basis of the scheme, the one-way conduction pipeline provided by the invention has two specific structural forms: the first one-way conducting pipeline is a shell-shaped pipeline, the shapes of the inner wall and the outer wall are the same, each Tesla valve 5 is of a thin shell structure, and the surface area of the inner wall is approximately equal to that of the outer wall.

In the second mode, the radiator 1 and the condenser 2 are of metal cuboid block structures, and the one-way conduction pipeline is a channel with a hollowed inner part and has a larger wall thickness.

The two setting forms can be adopted.

On the basis of any one of the technical schemes and the mutual combination thereof, the two adjacent Tesla valves 5 of the one-way conduction pipeline are parallel and coplanar or mutually and vertically crossed; in the configuration shown in fig. 2, the tesla valves 5 are parallel and coplanar with each other. Since the conduits of the individual tesla valves 5 are coplanar, in addition to this, adjacent tesla valves 5 may be arranged with a certain angle therebetween, and these particular arrangements are intended to be included within the scope of the present invention. The planes and the crossing modes can be arranged and combined at will.

Specifically, the radiator 1 and the condenser 2 of the present invention are made of copper or aluminum, and if the first form described above is adopted, a thin-walled piping structure is made of copper or aluminum; if the second form is adopted, a square solid body made of copper or aluminum is adopted, and the inside of the square solid body is hollowed to form a pipeline.

Preferably, heat radiating fins may be provided on outer surfaces of the heat sink 1 and the condenser 2 to accelerate heat transfer efficiency between external heat and the internal phase change medium.

Specifically, the phase change medium adopted by the invention is electronic fluorinated liquid. Taking Novec 7100 electronic fluorinated liquid from 3M company as an example, the fluorinated liquid has insulating property, the boiling point is about 61 ℃, and the fluorinated liquid is one of the commonly used refrigerating liquids in the common phase-change liquid cooling and heat dissipation scheme, and at present, companies such as 3M provide various refrigerating liquid products with different component combinations and different boiling point properties for selection.

The Novec 7100 electronic fluorinated liquid can be used as the phase-change refrigerating liquid, and the working temperature of the product is not higher than 61 ℃ all the time.

Compared with the common phase-change liquid cooling heat dissipation scheme, the invention uses the refrigerant liquid in a relatively narrow closed space (a radiator, a condenser and a pipeline), so that the demand on the refrigerant liquid amount is far less than that of the common phase-change liquid cooling heat dissipation scheme.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.