CN2479562Y - Hose cooling means - Google Patents

Abstract

The utility model relates to a hose heat sink and is essentially used for a heating source with small area of dissipation of heat. A heat absorber is used to rapidly and evenly guide heat, a plurality of hoses which are connected with the heat absorber are used for transmitting heat and then a dissipating heat head which is arranged on the end of the hose is used for dissipating heat. The internal portion of the heat absorber is filled with heat-transfer fluid which encounters thermal energy to produce corresponding changes, and after absorbing heat, the fluid flows to the hose and the heat is spilled out through the dissipating heat head. The liquid state is formed by the heat-transfer fluid to take advantage of potential energy difference and flow back to the heat absorber for circulating uses. The stiffness in flexure of the hose is used to take the heat out of a heating zone for dissipating heat and increase the dissipating heat efficiency, and the foldable hose is easy to assemble in match with the configuration of main body elements.

Description

The hose type heat abstractor

The relevant a kind of hose type heat abstractor (heat sink) of the utility model.

Traditional heat abstractor, for example a kind of heat radiator that is applied to the central processing unit (CPU) of computer, as shown in Figure 1.Because developing rapidly of industrial technology, the thermal value of electronic component will be more and more high and size can be more and more little, for this intensive heat effectively being distributed the environment outside system, work in the permissive temperature scope to keep element, usually be attached on electronic component 10 surfaces of heating with heat radiator 20, increase its overall area of dissipation to improve radiating effect with larger area base 22.The mode of heat radiation is generally the natural convection air cooling, or carries out the Forced Air Convection cooling with fan.

This moment, heat dissipation capacity, thermal resistance and the temperature difference relation of heat radiator can be expressed as by following formula (" the dispersion thermal resistance calculation in heat abstractor " of Li Sefu work, electronics cooling, the 4th volume, No. 1,1998): wherein $q=\frac{\mathrm{\ΔT}}{R_0+R_c}=\frac{T_{b,\max }-T_{\mathrm{air}}}{R_t}---\left(1\right)$ $R_c=\frac{\sqrt{A_p}-\sqrt{A_s}}{k\sqrt{\mathrm{\π}{A}_p{A}_s}}\×\frac{\mathrm{\λk}{A}_p{R}_0+\tanh \left(\mathrm{\λt}\right)}{1+\mathrm{\λk}{A}_p{R}_0\tanh \left(\mathrm{\λt}\right)}---\left(2\right)$ $\mathrm{\λ}=\frac{{\mathrm{\π}}^{2/3}}{\sqrt{A_p}}+\frac{1}{\sqrt{A_s}}---\left(3\right)$

Δ T is the maximum temperature L of cooling fin fin base 22 in the equation _{B, max}With environment temperature T _AirPoor, R ₀Be the average thermal resistance of heat radiator 20, the thermal resistance when it is integral heat sink sheet base thermally equivalent.R _cBe the contraction thermal resistance (constriction resistance) of heat radiator, or be called and disperse thermal resistance (spreading resistance) that promptly heat stream is by the thermal resistance of heat source region along the cooling fin fin base lateral transport to the edge, heat radiator entire thermal resistance R _tLittler, its heat dispersion is better, the base temperature T _{B, max}And the electronical elements surface temperature is also lower.In addition, A _pBe cooling fin fin base area, A _sBe the thermal source area, k is the pyroconductivity of cooling fin fin base.Therefore when the cooling fin fin base area A _pGreater than the thermal source area A _sThe time, the ratio of disperseing the shared entire thermal resistance of thermal resistance is with A _p/ A _sIncrease and increase.Disperse thermal resistance to represent heat to concentrate on the heat radiator heat source region more greatly, the utilization rate of heat radiator is low, the maximum temperature L of cooling fin fin base _{B, max}Higher and thermograde is also bigger.Disperse the thermal resistance little heat of then representing of healing to be scattered in cooling fin fin base, the service efficiency height of heat radiator, the maximum temperature T of cooling fin fin base _{B, max}Thereby it is lower and thermograde is also less.Disperse thermal resistance R as can be known by formula (2) _cWith diffusing sheet base area and thermal source area ratio A _p/ A _sIncrease and increase, and reduce with the pyroconductivity k of cooling fin fin base or the increase of substructure height t.When the electronic element radiating increase in demand, (keep cooling fin fin base maximum temperature T in the time of must adopting big base heat radiator to dispel the heat to increase _{B, max}In tolerance band), for remedying the shortcoming that heat radiator disperses thermal resistance to increase, by formula (1) as can be known, must manage to reduce the average thermal resistance of heat radiator.Its mode has the flow velocity that improves cooling air or increases more heat radiator, or reduces the temperature T of cooling air _AirTo improve cooling power (driving force), also can reduce to disperse thermal resistance and strengthen the cooling fin fin base height t or use high thermal conductance material (changing copper into) instead as aluminium.Make a general survey of these and remedy measure and will increase noise, weight, cost and system complexity etc., and effect is limited, is not to be effectively settling mode.

And be applied to the design of employing heat pipe (heat pipe) principle that the heat abstractor of the electronic component of notebook computer central processing unit (CPU) for example has.General this micro heat pipe heating radiator is to utilize low pressure and siphon principle to be made into, thereby is subjected to caliber and loses heat quantitative limitation.

In view of this, the purpose of this utility model is to provide a kind of and can effectively draws the heat of pyrotoxin and have the heat abstractor that preferable heat-sinking capability is arranged.

According to above-mentioned above-mentioned purpose of the present utility model, the utility model provides a kind of hose type heat abstractor, which comprises at least a heat dump, at least one bent flexible pipe and a heat dissipation head; Wherein, heat dump is used with pyrotoxin and is directly contacted, and is a sealing one container of first metallic conductor formation of a high heat conduction, inner heat transfer fluid of filling a chance heat energy generation phase change, and by the heat of metallic conductor conduction pyrotoxin, and by the absorption of fluids heat; Bent flexible pipe is connected with heat dump, inner fluid of filling vaporization; Heat dissipation head is constituted by second metallic conductor of a high heat conduction, is located at the end of flexible pipe, makes the fluid heat radiation of vaporization condense into liquid state and recycles because of the potential energy difference flows back to heat dump.

Above-mentioned high heat conduction first metallic conductor and second metallic conductor can adopt aluminium, and the fluid of filling in the closed container can be pure water, and heat dump and heat dissipation head outside surface can form have fin structure with the increase area of dissipation.The flexible pipe heat abstractor is designed to the corresponding a plurality of heat dissipation heads of a heat dump.

Adopt hose type heat abstractor of the present utility model, can utilize heat dump to draw the heat of pyrotoxin, flow in the flexible pipe that extends after making inner filling liquid fluid vaporization,, utilize the potential energy difference to flow back to radiating part after condensing and recycle by being arranged at the heat dissipation head heat radiation of hose end; Because the flexible pipe of hose type heat abstractor of the present utility model is made very slightly, radiator liquid is increased considerably, in other words comparable traditional heat pipe heat radiation ability improves greatly, in view of this, the purpose of this utility model is to provide a kind of heat abstractor that can effectively draw the heat of pyrotoxin and have preferable heat-sinking capability.Therefore can provide preferable heat-sinking capability, the heat of pyrotoxin is dissipated in the atmospheric environment effectively, because adopt the design of flexible pipe, the heat radiation very good arrangement in position (because of flexible pipe can bend arbitrarily) is made also more or less freely simultaneously.

For above-mentioned purpose, characteristics and advantage with other of the present utility model can be become apparent, the utility model is elaborated below by a preferred embodiment and conjunction with figs..

Fig. 1 is the plan view of a kind of traditional heat radiator that electronic element radiating is provided of illustrating,

Fig. 2 is the schematic perspective view that hose type heat abstractor of the present utility model is shown; And

Fig. 3 is the synoptic diagram that hose type heat abstractor that Fig. 2 is shown is arranged at a notebook computer.

Please refer to Fig. 2, it is the schematic perspective view of the utility model hose type heat abstractor.As shown in the figure, the utility model heat abstractor 30 comprises a heat dump 32, a flexible pipe 34 and a heat dissipation head 36.On synoptic diagram, heat dump 32 can be corresponding to the part of the base of traditional heat-dissipating sheet, but its structure and the function and traditional differing widely that can realize.Though heat dump 32 is the same with traditional cooling fin fin base, be to adopt the metallic conductor that directly contacts with electronic component 10 pyrotoxins such as grade, but this is the closed container that a high heat conductive metal conductor is constituted, its volume inside is being filled and is being met the heat transfer fluid that heat energy produces phase change, for example be pure water, acetone or methyl alcohol etc., but if examine void to the matching (for example whether can produce chemical reaction) between working fluid and heat dump 32 materials, comparatively ideal working fluid should be selected pure water.Heat dump 32 mainly can be realized the heat that the metallic conductor conduction electron element 10 by the closed container periphery is produced, and by the absorption of fluids heat of inside, so heat that electronic component 10 is given out, all absorbed by the fluid in the closed container equably, and absorption of fluids a large amount of heats will vaporize and form steam, by connecting the flexible pipe 34 that on the heat dump 32, just be filled in flexible pipe 34 pipes, at last, because flexible pipe 34 is to extend to be exposed in the external environment, the nature of outside air or forced convertion, the fluid of vaporization is condensed in the heat release of the position of heat dissipation head 36, and the fluid liquid that condenses comes to such an extent that high formed potential energy is poor because of the position of heat dissipation head 36 than the position of endothermic section 32, and liquid fluid is flowed back in the heat dump 32 automatically.So circulation constantly, heat dump 32 absorbs heats, its inner working fluid vaporization is carried through flexible pipe 34, by heat dissipation head 36 heat is distributed to the external world, reaches high efficiency element radiating effect.

Because heat abstractor adopts the design of flexible pipe 34, flexible pipe 34 tool pliabilities are easy to bending, therefore the very good arrangement in position of device, as shown in Figure 3, the utility model heat abstractor 30 is located in the notebook computer 40, can adopt a plurality of flexible pipes 34,34 ', so can increase heat dissipation capability, and cooperate notebook computer 40 original component placements, flexible pipe 34 configurations can be bent and be made full use of unappropriated space between computer, moreover, can conduct heat to easily heat radiation place by flexible pipe 34, and can too not concentrate on the heat radiation of pyrotoxin zone, so, the path of flexible pipe 34 guidings can be arranged arbitrarily, the heat dissipation head 36 on the top by being arranged on flexible pipe 34 is designed to the high efficiency heat absorbing element of tool, and heat is shed in a large number by heat dissipation head 36, to improve the effect of heat radiation.

Above-mentioned heat dump 32 adopts high heat conductive metal with heat dissipation head 36, mainly be the characteristic of utilizing its coefficient of heat conductivity high, make heat outwards conduction fast, therefore general optional usefulness has the metal such as the aluminium of high thermal conductivity coefficient, the selling at exorbitant prices of aluminium is so also can select metal as copper for use.Heat dump 32 of the present utility model mainly is the high-thermal conductive metal that utilizes metal plate, the fluid of being filled by inside by heat conduction is absorbed, but in the heat radiation process of reality, the cold air of extraneous nature or forced convertion also has the effect of cooling heat dump 32, therefore, for increasing the effect of heat radiation, heat dump 32 closed container surfaces can form the projection with fin structure, and its surface area is increased to increase heat dissipation.In like manner, heat dissipation head 36 outside surfaces also can form the projection of tool fin structure, and its surface area is increased to increase heat dissipation.

Though the utility model is specifically described by the description to a preferred embodiment with way of example; this embodiment is not in order to limit the utility model then; any those skilled in the art that; in not breaking away from spirit and scope of the present utility model; also can do all changes and modification, therefore protection domain of the present utility model should be basis with the content that claim was disclosed.

Claims (8)

1, a kind of hose type heat abstractor is characterized in that, which comprises at least:

One heat dump, directly contacting with this pyrotoxin, is the closed container of first metallic conductor formation of a high heat conduction, its inner heat transfer fluid of filling a chance heat energy generation phase change, conduct the heat of this pyrotoxin with this metallic conductor, and by this heat of this absorption of fluids;

At least one bent flexible pipe is connected with this heat dump, inner this fluid of filling vaporization; And

One heat dissipation head is the not end that second metallic conductor of a high heat conduction constitutes and be arranged at this flexible pipe, makes this fluid heat radiation of vaporization condense into liquid state, recycles and utilize the potential energy difference to flow back to this heat dump.

2, hose type heat abstractor as claimed in claim 1 is characterized in that, this pyrotoxin is an electronic component.

3, hose type heat abstractor as claimed in claim 2 is characterized in that, this pyrotoxin is the central processing unit (CPU) of a notebook computer.

4, hose type heat abstractor as claimed in claim 1 is characterized in that, this first metallic conductor is an aluminium.

5, hose type heat abstractor as claimed in claim 1 is characterized in that, forms on this heat dump outside surface to have fin structure to increase the diffusing area of heat.

6, hose type heat abstractor as claimed in claim 14 is characterized in that, this fluid is a pure water.

7, hose type heat abstractor as claimed in claim 1 is characterized in that, this second metallic conductor is an aluminium.

8, hose type heat abstractor as claimed in claim 1 is characterized in that, forms on this heat dissipation head outside surface to have fin structure to increase the diffusing area of heat.

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