CN205436085U - Novel atomizing refrigeration nozzle and system - Google Patents

Abstract

The utility model discloses a novel atomizing refrigeration nozzle and system compares with traditional atomizing refrigeration technology, and the device provides the hollow round cone type atomizer that can improve atomizing refrigeration effect, including tangential feed liquor hole, rotating room and nozzle bore, tangential feed liquor hole is on hollow round cone type atomizer top, and the rotating room is connected with the rotating room in the cavity position of hollow round cone type atomizer, tangential feed liquor hole, and the rotating room connects the nozzle bore in the bottom, simultaneously the utility model discloses an atomizing refrigeration nozzle system, this system are hydraulic formula atomizing jet cooling system, store bottle, 3 elementary cells on valve member and the atomizing injection subassembly including the refrigerant, and the atomizing is sprayed the subassembly and is contained neotype atomizing refrigeration nozzle, simple structure, can obtain economically fast that high -quality atomizing drips, increases endothermal surface area, refrigeration efficiency is high, and the problem of generating heat of producing is solved to effective atomizing refrigeration of utilizing.

Description

A kind of novel atomizing refrigerating nozzle and system

Technical field

This utility model belongs to the raw calorific effect atomizing refrigerating field of solution, particularly relates to a kind of novel atomizing refrigerating nozzle and system.

Background technology

In the industrial production, atomizing refrigerating is to solve a raw calorific effect effective way.As a example by high power solid state laser, it is in use, overwhelming majority energy change into used heat, distribute used heat the most in time, solve that a large amount of used heat seriously reduces laser beam quality, even to damage the problem of laser medium be to develop one of key technology that great-power solid laser must capture.Atomizing refrigerating has the higher coefficient of heat transfer, relatively low flow, cools down the advantages such as uniform, and therefore atomizing refrigerating technology is the effective way solving problems.

Recent domestic is correlated with scholar's composition of refrigeration working medium mainly in research atomizing refrigerating technology and ratio, the impact of the speed heat exchanging performance of jet.But in actual applications, owing to nozzle arrangements is complicated in existing technology, cannot obtain the shortcomings such as high-quality atomizing drips, refrigerating efficiency is low fast, economical, this effective refrigeration approach of atomizing refrigerating cannot be promoted on a large scale.

Utility model content

This utility model is in order to solve the problems referred to above, it is provided that a kind of novel atomizing refrigerating nozzle and system, and this Novel atomized refrigeration nozzle is a kind of open circles bevel-type atomizer that can improve atomizing refrigerating effect, and its system is hydraulic type spray cooling system.This utility model simple in construction, it is possible to the atomizing producing fogdrop diameter sufficiently small drips, and increases the surface area of heat absorption, improves refrigerating efficiency.

To achieve these goals, this utility model adopts the following technical scheme that

A kind of novel atomizing refrigerating nozzle, including open circles bevel-type atomizer, described open circles bevel-type atomizer, including tangential direction hole, rotating room and nozzle bore；Tangential direction hole is on open circles bevel-type atomizer top, and rotating room is in the hollow part of open circles bevel-type atomizer, and tangential direction hole is connected with rotating room, connects nozzle bore bottom rotating room.

Described tangential direction hole be shaped as rectangle, for even spraying, the top, rotating room of open circles bevel-type atomizer connects 2 tangential direction holes.

Length L in described tangential direction hole is determined by the width b in tangential direction hole, takes L/b=3～6.

Described nozzle bore is cylindrical, and the surface roughness on its face of cylinder is 1.6～3.2.And at nozzle hole entrance and the smooth surface of exit.

Described open circles bevel-type atomizer, its operation principle is:

After highly pressurised liquid enters the tangential direction hole of open circles bevel-type atomizer, liquid at high speed flows into the rotating room of open circles bevel-type atomizer, and liquid portion static pressure transfers kinetic energy to makes liquid rotate.According to the free vortex law of conservation of momentum, rotary speed and radius are inversely proportional to, the biggest the closer to axle center rotary speed, finally it is centrally formed one pressure air swirl equal to atmospheric pressure at open circles bevel-type atomizer, liquid then forms the annular liquid film rotated around air and sprays from nozzle, and liquid film elongation is thinning pulls into filament, from nozzle bore more away from, it is the thinnest that liquid film is unfolded, and final liquid ruptures is that atomizing drips.

A kind of novel atomizing refrigerating nozzle system, for hydraulic type spray cooling system, stores bottle, valve member and atomized spray assembly including cold-producing medium.One end of the outlet connecting valve assembly of cold-producing medium storage bottle, the other end of valve member connects atomized spray assembly；Described atomized spray assembly, comprises novel atomizing refrigerating nozzle described in the utility model.

Described cold-producing medium storage bottle storage band compression refrigerant.

Described valve member, controls functional unit including refrigerant charging tank and controls functional unit with cold-producing medium flowing.

Described cold-producing medium charges control functional unit and uses check valve or stop valve.

The flowing of described cold-producing medium controls functional unit and uses electromagnetic valve or electric blasting valve.

Described atomized spray assembly, the fogdrop diameter of its ejection controls in 50～100 μm.

The beneficial effects of the utility model are:

(1) droplet of this utility model injection is that the optimum atomizing of refrigeration drips.Atomizing refrigerating principle is exactly droplet vaporization heat absorption, and small drop can absorb amount of heat vaporization within the short time that target area stops, and therefore fogdrop diameter size is huge on refrigeration impact.In a practical situation, refrigeration and fogdrop diameter size non-linear relation, when diameter is too small, single drop refrigerating capacity is the least, and refrigeration is greatly reduced on the contrary, and it is the highest to be atomized cost.Research finds, fogdrop diameter size controls to drip at atomizing have optimum refrigeration.

(2) the mist type of this utility model injection is suitable for the hollow cone of atomizing refrigerating.Liquid high speed rotating in rotating room in open circles bevel-type atomizer, because being presented open circles taper by centrifugal force after nozzle bore sprays, the liquid-drop diameter that the shower nozzle of open circles bevel-type produces is little, be applicable to the occasion that spray amount is little, is well suited for being used on atomizing refrigerating.

Accompanying drawing explanation

Fig. 1 is open circles bevel-type atomizer longitudinal section schematic diagram；

Fig. 2 is open circles bevel-type atomizer cross-sectional；

Fig. 3 is the mist type of hydraulic type atomization；

Fig. 4 is novel atomizing refrigerating nozzle system schematic diagram.

Wherein, 1. rotating room, 2. nozzle bore, 3. tangential direction hole, 4. cold-producing medium storage bottle, 5. valve member, 6. atomized spray assembly.

Detailed description of the invention:

The utility model is described in further detail with embodiment below in conjunction with the accompanying drawings.

As shown in Figures 1 and 2, a kind of Novel atomized refrigeration nozzle, have employed the open circles bevel-type atomizer that can improve atomizing refrigerating effect, described open circles bevel-type atomizer, including tangential direction hole 3, rotating room 1 and nozzle bore 2.Tangential direction hole 3 is on open circles bevel-type atomizer top, and rotating room 1 is in the hollow part of open circles bevel-type atomizer, and tangential direction hole 3 is connected with rotating room 1, connects nozzle bore 2 bottom rotating room 1.

Described tangential direction hole 3 be shaped as rectangle, for even spraying, the top, rotating room of open circles bevel-type atomizer connects 2 tangential direction holes.

Length L in described tangential direction hole is determined by the width b in tangential direction hole, takes L/b=3～6.

Described nozzle bore 2 is cylindrical, and the surface roughness on its face of cylinder is 1.6～3.2.And at nozzle hole entrance and exit is not allow for burr.

Described open circles bevel-type atomizer operation principle is: the open circles bevel-type atomizer in described a kind of Novel atomized refrigeration nozzle utilizes the centrifugal force of fluid vortex to make the liquid atomization.After highly pressurised liquid enters the tangential direction hole of open circles bevel-type atomizer, liquid at high speed flows into the rotating room of open circles bevel-type atomizer, and liquid portion static pressure transfers kinetic energy to makes liquid rotate.According to the free vortex law of conservation of momentum, rotary speed and radius are inversely proportional to, the biggest the closer to axle center rotary speed, eventually form one pressure air swirl equal to atmospheric pressure, liquid then forms the annular liquid film rotated around air and sprays from nozzle bore, and liquid film elongation thinning pulls into filament, from nozzle bore more away from, it is the thinnest that liquid film is unfolded, and final liquid ruptures is fine mist.Droplet, under the effect of inertia force, is sprayed on object space.

The feature of described open circles bevel-type atomizer is: as the pressure increases, the rotary-type rotary speed that liquid enters after open circles bevel-type atomizer is the fastest, the droplet tangential velocity of ejection is the biggest, and spreading of spray increases along with the increase of spray amount, but fogdrop diameter reduces；After pressure increases to certain numerical value, if continuing to increase, the increase of spreading of spray and the reduction of fogdrop diameter are the most notable；Internal friction increases, and resistance, along with increase, is consumed in the energy within open circles bevel-type atomizer and increases rapidly.When the pressure drops, flow rate of liquid and atomization situation are completely contrary, and after dropping to certain numerical value, open circles bevel-type atomizer does not the most play nebulization.

The design of open circles bevel-type atomizer, is to make working medium under the promotion of pressure, passes through nozzle bore so that it is has enough speed, energy to spread, is generally initially formed film like, forms droplet unstable, not of uniform size the most again.

There is three types in the atomizing type of droplet, i.e. droplet is broken, jet crushing and liquid sheet breakup.Owing to the atomizing type of liquid is different, the movement locus of the droplet of generation also difference is the biggest.Different shower nozzles and atomization parameter, the motor process also making produced droplet is sufficiently complex.Hydraulic type atomization under, the movement locus of droplet under the influence of not considering the situations such as wind-force, can be approximately considered be linear motion, the gravity of droplet obtain energy with from shower nozzle compared be negligible.The mist type that this spray pattern produces, depends primarily on form and the atomisation pressure of nozzle, as shown in Figure 3.

Theoretical according to classical Dombroski and Fraser, the formation of liquid film and character thereof are the character (such as viscosity, surface tension and density etc.) by liquid working substance and the Reynolds number of jet is determined.The inertia being formed as liquid film quality at liquid film edge and its surface tension reach the result of balance, and liquid film develops further, and inertia force exceedes surface tension, will be divided into droplet.So, the energy that liquid is had when leaving nozzle bore deducts the ability being had when liquid film begins to differentiate into droplet, is equal to the energy that liquid is consumed during formation and development liquid film.Ignoring the gravity etc. of the friction in atomization process and working medium to dissipate impact, we can carry out the factor of analyzing influence atomization by setting up the energy-balance equation before and after atomization process.

In order to illustrate droplet form each during energy conversion, liquid film is isolated the fritter that quality is Δ m, it is assumed that this fritter is with V_ΔmSpeed separate from liquid film, and form a diameter of d, initial velocity is the droplet of V.For simplify energy equation, do it is assumed hereinafter that:

(1) Δ m fritter surface area in liquid film is negligible relative to the surface area after forming droplet；

(2) droplet is affected by liquid properties such as surface tension, viscosity and density when being formed；

(3) droplet does not has heat exchange in forming process；

(4) quality is conservation, wherein(in formula, ρ is fluid density).

According to assumed above, by preservation of energy, its energy equation can be expressed as:

$\frac{1}{2}\left(\mathrm{\Δ}m\right){V^2}_{\mathrm{\Δ}m}+g\mathrm{\Δ}m\mathrm{\Δ}h=\frac{1}{2}\left(\mathrm{\Δ}m\right)V^2+{\mathrm{\πd}}^2\mathrm{\σ}+\frac{\mathrm{\π}}{4}{d}^2{\mathrm{\μV}}_{\mathrm{\Δ}m}---\left(1\right)$

In formula: g acceleration of gravity；The surface tension of σ liquid；The absolute viscosity of μ liquid；Vertical dimension between present position when Δ h liquid film edge and droplet are formed.

Assume that droplet generates in radial directions, use V_SRepresent the radial velocity of liquid film when droplet produces.For giving orientation, formula (1) can be write as:

$d=\frac{12\mathrm{\σ}+3\mathrm{\μ}Vs}{\mathrm{\ρ}({\mathrm{Vs}}^2+2g\mathrm{\Δ}h-V^2)}---\left(2\right)$

The process formed according to droplet and hypothesis in this paper, arrange a lower limit, make V fogdrop diameter_max=0, then (2) formula can be modified to:

$d_{min}=\frac{12\mathrm{\σ}+3\mathrm{\μ}Vs}{\mathrm{\ρ}({\mathrm{Vs}}^2+2g\mathrm{\Δ}h)}---\left(3\right)$

Use V_smaxRepresent the radial velocity that at droplet formation, liquid film is maximum, because V² _smaxMuch larger than 2g Δ h, (3) formula can obtain minimum fogdrop diameter is:

$d_{\min }=\frac{12\mathrm{\σ}+3\mathrm{\μ}Vs}{{{\mathrm{\ρV}}^2}_{s\max }}\max ---\left(4\right)$

The classification of droplet is to carry out by the magnitude classification of droplet, and continuing to use more is that Matthew proposes sorting technique, as shown in table 1.

Table 1 droplet type sorting technique by size

For occasion of specifically freezing, when selecting suitable fogdrop diameter size, it is considered as droplet from open circles bevel-type atomizer to the motion of object space, and the impact that droplet is moved by the factor such as gravity, electrostatic.There is above derivation to understand under equal energy condition to reduce refrigerant liquid usage amount, use the droplet that a large amount of diameter is little, it is possible to obtain covering effective to object space and preferable refrigeration.The droplet of open circles bevel-type atomizer nozzle bore of the present utility model ejection is that atomizing drips.

When liquid be separated into atomizing drip time, its surface area can be greatly increased.The utilization that atomizing is dripped by this nonlinear relation is very favorable.Owing to the reduction of fogdrop diameter causes the long-pending increase of droplet surface, making droplet increase with the contact area of air, volatility strengthens.The result of this change is: in the air that humidity is less, and atomizing drips the effect that at object space rapid vaporization, can reach refrigeration.

A kind of novel atomizing refrigerating nozzle system, for hydraulic type spray cooling system, stores bottle 4, valve member 5 and atomized spray assembly 6 including cold-producing medium.One end of the outlet connecting valve assembly 5 of cold-producing medium storage bottle 4, the other end of valve member 5 connects atomized spray assembly 6；Described atomized spray assembly 6, comprises novel atomizing refrigerating nozzle described in the utility model.

Described cold-producing medium storage bottle 4 stores band compression refrigerant.

Described valve member 5, controls functional unit including refrigerant charging tank and controls functional unit with cold-producing medium flowing.

Described cold-producing medium charges control functional unit and uses check valve or stop valve.

The flowing of described cold-producing medium controls functional unit and uses electromagnetic valve or electric blasting valve.

Described atomized spray assembly 6, the fogdrop diameter of its ejection controls in 50～100 μm；Cold-producing medium is not carried out reclaiming cycling and reutilization after carrying out refrigeration work by hydraulic type spray cooling system, and therefore its cooling time depends on cold-producing medium carrying amount.Hydraulic type spray cooling system is applicable to the thermal protection of the high heat flux equipment worked in a short time.

Although detailed description of the invention of the present utility model is described by the above-mentioned accompanying drawing that combines; but the not restriction to this utility model protection domain; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art need not to pay various amendments or deformation that creative work can make still within protection domain of the present utility model.

Claims (8)

1. a novel atomizing refrigerating nozzle, is characterized in that: include open circles bevel-type atomizer；

Described open circles bevel-type atomizer, including tangential direction hole, rotating room and nozzle bore；Tangential direction hole is on open circles bevel-type atomizer top, and rotating room is in the hollow part of open circles bevel-type atomizer, and tangential direction hole is connected with rotating room, connects nozzle bore bottom rotating room.

A kind of novel atomizing refrigerating nozzle the most as claimed in claim 1, is characterized in that:

Described tangential direction hole be shaped as rectangle, the top, rotating room of circular cone type shower nozzle connects 2 tangential direction holes；

Length L in described tangential direction hole is determined by the width b in tangential direction hole, takes L/b=3～6；

Described nozzle bore is cylindrical, and the surface roughness on its face of cylinder is 1.6～3.2；And at nozzle hole entrance and exit smooth surface.

3. a novel atomizing refrigerating nozzle system, is characterized in that: include cold-producing medium storage bottle, valve member and atomized spray assembly；

One end of the outlet connecting valve assembly of described cold-producing medium storage bottle, the other end of valve member connects atomized spray assembly；

Described atomized spray assembly comprises the novel atomizing refrigerating nozzle described in claim 1.

A kind of novel atomizing refrigerating nozzle system the most as claimed in claim 3, is characterized in that: described cold-producing medium storage bottle storage band compression refrigerant.

A kind of novel atomizing refrigerating nozzle system the most as claimed in claim 3, is characterized in that: described valve member, controls functional unit including refrigerant charging tank and controls functional unit with cold-producing medium flowing.

A kind of novel atomizing refrigerating nozzle system the most as claimed in claim 5, is characterized in that: described cold-producing medium charges control functional unit and uses check valve or stop valve.

A kind of novel atomizing refrigerating nozzle system the most as claimed in claim 5, is characterized in that: the flowing of described cold-producing medium controls functional unit and uses electromagnetic valve or electric blasting valve.

A kind of novel atomizing refrigerating nozzle system the most as claimed in claim 3, is characterized in that: described atomized spray assembly, and the fogdrop diameter of its ejection controls in 50～100 μm.