CN2136434Y - Pressure differential refrigerator - Google Patents

Abstract

The utility model relates to a pressure differential refrigerator. The technology of pressure differential refrigeration adopts the air as the working medium. The high pressure air is ejected from both sides to a spherical cavity for expansion cooling; simultaneously, two strands of the cold and the hot air-streams are formed, and are respectively discharged from a cold duct arranged at the lower part of the spherical cavity and a hot duct arranged at the upper part of the spherical cavity. The hot duct is provided with a regulating rod for regulating the hot-cold air-stream ratio. The inside of the spherical cavity is provided with a polyvinyl fluoride lining for thermal insulation and corrosion prevention. The utility model reaches or exceeds all indicators of the refrigerating technology of Freon working medium at each aspect such as refrigerating capacity, the efficiency for air streams, potency ratio, etc. The utility model has the advantages of simple manufacturing technique, low cost, and no pollution, and can be used for various refrigeration devices.

Description

Pressure differential refrigerator

The utility model belongs to Refrigeration Technique.

In the existing Refrigeration Technique, be that the Refrigeration Technique of working medium is with fastest developing speed, use the most generally that effect is also best with fluorine Lyons.But because of its very big harmfulness to natural, ecological and human survival, development, multiple international conference has stipulated that clearly it limits the use of the phase.

For the substituted freon material, various New Refrigerating technology are constantly germinated like rain the back spring bamboo, but all big because of consuming energy, refrigerating efficiency is low and refrigerating capacity is limited etc., and unfavorable factor can not be applied.

As, semiconductor refrigerating, though effective, power consumption is big, efficient is low; Though it is less that electrothermal suction, desorption refrigeration consume energy, also do not reach deep refrigerating; Though Gu Shi circularly cooling efficient is better, but still there is fluorine Lyons material more than 50%; Ammonia refrigeration is also because of having toxicity, and within the restriction scope of application; The refrigeration of Cyclonic cold-hot separator is to be the New Refrigerating technology with very big superiority of working medium with the air, but because of still there are many inherent shortcomings in it, does not also reach due refrigeration, thereby has limited application.

For example, be stuck in the at first swirl control refrigeration technique of invention in 1933 by French engineer orchid, as Fig. 5-1, shown in the 5-2, its vortex tube comprises jet pipe 1, vortex tube 6, separation orifice 3 and cold and hot two ends pipe 5,4, compressed air tangentially enters minor air cell 6 after entering jet pipe, form free vortex flow, and be separated into temperature two strands of air-flows inequality: the low-temperature airflow of core, through the centre bore outflow of separation orifice 3, the high temperature gas flow of form peripheral edge portions flows out through choke valve 2 from the other end.Utilize this vortex tube can obtain the air-flow of hot and cold two kinds of different temperatures simultaneously.But, because the hot and cold air separation mechanism for this technology does not still have comprehensive analysis so far, just being interpreted as the vortex tube core is low-temperature airflow, periphery is a high temperature gas flow, thereby limit its refrigerator version is that cold airflow is discharged from the vortex tube center, thermal current is derived from the vortex tube inner rim, like this, has just influenced its effect and further exploitation.

And for example, the Cyclonic Refrigeration Technique, the working mechanism of its cold-hot separator in fact still belongs within the theoretical scope of blue card, institute's difference, just on expanding chamber, added a tangential blowhole, thereby the rotating structure of list of comparable blue card air-flow molecule of irregular movement of many one times in expanding chamber, thereby refrigerating efficiency improved, but because its cooling flow separate mode is identical with blue cassette, so its effect still is restricted.

In addition, above-mentioned blue cassette vortex tube and Cyclonic refrigeration plant, its expanding chamber all are pipe shape chambers, and this shape has limited the formation of the irregular micel of gas and effective separation of hot and cold air; And, the two used nozzle all is a kind of shutoff type nozzle, as shown in Figure 6, when gas by nozzle after the fine pore b, pressure significantly reduces immediately, the a-b section of nozzle has played the buffering step-down, so the expansion effect when making the gas jetting nozzle reduces greatly, thereby has influenced refrigeration.

In addition, they all adopt low pressure (0.15---0.5MPa) air input mode, for obtaining certain refrigeration, just require atm number, thus the air source that need match, this has just limited its refrigerating capacity and range of application.

At the shortcoming of above-mentioned technology, the utility model proposes a kind of New Refrigerating technology.

The purpose of this utility model provides a kind of differential pressure refrigeration device, improves the volume of expanding chamber structure with reinforcement expansion effect and the irregular molecular motion of increase gas, and hot and cold air is effectively separated.

Another purpose of the present utility model provides a kind of differential pressure refrigeration device, improves nozzle arrangements, makes gases at high pressure directly spray into expanding chamber without buffering ground, to strengthen refrigeration.

Another purpose of the present utility model provides a kind of differential pressure refrigeration device, utilizes high pressure input gas, forms big pressure reduction, to reach good refrigeration.

The utility model differential pressure refrigeration device at first is a building on the new contribution basis of air cooling theory, and the utility model refrigeration principle is:

1, in the expansion space of the identical various geometries of volume, spherical expansion space can form maximum cold air micel, can form maximum irregular gas molecule motion volume in other words.Fig. 7 shows the air-flow potential field after Compressed Gas sprays into differential spherical expansion chamber, initial gas force and velocity of a current field state when wherein Fig. 7-1 sprays into for gas, the air-flow potential field state of Fig. 7-2 for forming in the expansion process, Fig. 7-3 is for after expanding, cold airflow has formed the air-flow potential field state of big irregular micel, has finished process of refrigerastion.That contrast with it is Fig. 8-1,8-2, and 8-3 and Fig. 9-1,9-2, the gas expanded gas flow potential field state of the eddy current tubular type refrigeration of Cyclonic refrigeration shown in the 9-3 and blue card.Clearly, both just irregular bands of air molecule of in expansion chamber, forming of back, promptly only in the air molecule belt-like zone that is the vortex shape motion, air molecule is relative irregular movement.And in the spherical cavity of the present utility model, then formed maximum air molecule irregular movement district, thereby formed maximum cold air micel.

2, the situation of the hot and cold air-flow of formation is relevant with the expansion chamber shape in differential expansion chamber.After compressed air expands rapidly under adiabatic condition, lower the temperature because of rapid depressurization on the one hand, produce cold airflow, on the other hand, the gas molecule of injection is to the cavity wall collision with along the chamber wall friction of motion, thereby the generation heat forms thermal current, the latter and expansion chamber inner wall shape have confidential relation, and spherical inwall is compared with cylindrical container, can weaken the friction and the collision of gas molecule significantly, thereby help the formation of big cold air micel.

3, the hot and cold gas that forms in differential expansion space because of its density difference, and causes thermal current upwards, and cold airflow is downward; Spherical expansion chamber provides optimum spatial form for drawing of two kinds of air-flows.

4, adopt high pressure input gas, form and import and export big pressure reduction, thereby can strengthen speed of expansion and increase the volume of the irregular molecular motion of gas.

According to above-mentioned principle, basic composition is of the utility model refrigerator: the outer solid of an opposite opened, inside is a spherical expansion chamber, a snorkel is respectively installed in the both sides of being somebody's turn to do outer solid, two snorkels are installed with parallel and symmetrical manner with respect to the spherical cavity axis, respectively install a nozzle in two snorkels, in spherical cavity, to spray into compressed air; This spherical cavity bottom is provided with air coolant tube, and spherical cavity top is provided with hot gas conduit.

The utility model differential pressure refrigeration device all is better than existing other Refrigeration Techniques in various aspects such as refrigerating capacity, tolerance efficient and efficiency ratios, reach and surpassed every index (seeing below attached tables of data) of fluorine Lyons working medium Refrigeration Technique, thus fully can the substituted freon refrigeration.And the utility model refrigerator manufacturing process is simple, and cost is low, especially in absolute pollution-free this importance, is better than existing Refrigeration Techniques such as fluorine Lyons greatly, and therefore, the utility model differential pressure refrigeration device can be widely used in various refrigeration plants.

The effect of the utility model Refrigeration Technique and other Refrigeration Techniques relatively is listed as follows:

Refrigeration modes	Coefficient of refrigerating performance	The gas transmission rate
			CFCs refrigeration vortex tube Cyclonic is differential	2.5 1.0 2.7 4.0	＞69% ＜14% ＜55% 65-70%

Below in conjunction with accompanying drawing, the utility model is elaborated by embodiment:

Fig. 1 is the utility model refrigerator schematic top plan view;

Fig. 2 is A-A, B-B among Fig. 1, C-C profile;

Fig. 3 is the utility model refrigerator front elevational schematic;

Fig. 4 is the utility model refrigerator nozzle arrangements schematic diagram;

Fig. 5-1,5-2 are blue card vortex tube structural representation;

Fig. 6 is blue cassette, Cyclonic nozzle schematic diagram;

Fig. 7-1,7-2,7-3 are this differential air-flow potential field figure;

Fig. 8-1,8-2,8-3 are Cyclonic air-flow potential field figure;

Fig. 9-1,9-2,9-3 are blue cassette eddy current air-flow potential field figure.

Initial gas force and velocity of a current field when 1 among Fig. 7,8,9 sprays into for gas, 2 is the air-flow potential field in the expansion process, 3 are the back air-flow potential field that expands.

As shown in Figure 1, 2, 3, the utility model differential pressure refrigeration device comprises the outer solid 1 of an opposite opened expansion chamber, and this outer solid 1 inside is a spherical expansion chamber 2, and spherical cavity 2 liners are equipped with polytetrafluoroethyllining lining 3, play heat insulation and corrosion-resisting function; A high pressure snorkel 4 is respectively installed in the relative both sides of solid 1 outside, be fixed with nozzle 5 in this high pressure snorkel 4, two-supremes force feed tracheae 4 respectively with respect to the spherical cavity axis with parallel symmetric mode setting, nozzle 5 extends the spherical cavity inwall, in order to strengthen the expansion effect of Compressed Gas, nozzle 5 as shown in Figure 4, its front portion is a thin footpath straight tube 6, make the gases at high pressure that enter in nozzle, be not cushioned decompression and until nozzle exit end just sudden pressure reduction expand; One cold air tap is arranged under described spherical cavity 2, install a cold conduit 7, be surrounded by muff 8 outside the cold conduit 7, a hot gas tap is arranged directly over spherical cavity 2, install a heat pipe 9, one upper gas chamber 10 is set outside this heat pipe 9, have a heat outlet 11 on the upper gas chamber 10, and an adjusting lever 12 is installed, in order to adjust the hot gas flow, to regulate the ratio and the temperature of hot and cold air, these adjusting lever 12 usefulness collars 13 lockings; Described to over the halves of solid 1 have fastening through-hole 14(Fig. 3), bolt is tight with outer solid 1 bolt by this through hole; Outer solid 1 also has installing hole 15(Fig. 1) so that refrigerator is installed on the applied refrigeration plant.

The course of work of above-mentioned refrigerator is as follows: the pressure-air of general＞0.7MPa is sent into spherical cavity 2 through two snorkels 4 and nozzle 5, after two strands of symmetries, parallel compressed air enter ball chamber 2, puffing immediately, through expansion process shown in Figure 7, form a big cold air micel rapidly, cold air is discharged by cold conduit 7 rapidly because density is bigger, and this thigh continuously cold airflow temperature can be lower than-8 ℃; Again because the high-voltage high-speed injection, air is in spherical cavity 2 inwalls collisions with along the result of inwall flowage friction, in the chamber, produced one thermal current, because thermal current density is little, adjust lower edge heat outlets 11 by heating pipe 9 at adjusting lever 12 and discharge very soon, can obtain thermal current continuously, temperature can reach more than 40 ℃, thereby reaches the purpose of highly effective refrigeration.

The experimental data of differential pressure refrigeration device such as following table:

Environment temperature ℃	Displacement m 3/h	Population pressure MPa	Outlet pressure MPa	Cold pipe temperature ℃	Heat pipe temperature ℃	Cold and hot tolerance ratio
							31.5 31.5 31.5 31.5	20 20 20 20	0.5 0.7 0.8 0.9	0.10 0.11 0.12 0.13	8-9 1.5 -3 -8	42 47 49 52	6.2:3.5 6.7:3.3 7.0:3.0 7.1:2.9

Experiment is carried out on a kind of reciprocating type suspension body compressor, gas production 0.35m/min, maximum pressure 1.0MPa, power 700W.

According to above-mentioned experiment, the general performance index of the utility model Refrigeration Technique is as can be known:

Refrigerating efficiency:＞3500KCdl/h.km;

Coefficient of refrigerating performance (efficiency ratio):＞3.5;

Tolerance efficient (gas transmission rate):＞65%;

The output temperature difference:＞35 ℃;

Cold air temperature: be lower than-8 ℃.

When gas source temperature is reduced to below 25 ℃, cold air temperature reduce to-12 ℃～below-14 ℃; When utilizing circulating cold air, cold air temperature then reduce to-15 ℃～below-20 ℃.Can satisfy the low-temperature receiver requirement of cold product in the first cold-peace fully.

Experimental result shows that also distribution pressure becomes positive correlation with refrigeration, and can regulate and control as required.Experiment showed, that further working pressure can be regulated and control in order to satisfy the low-temperature receiver requirement of deep cooling in 0.7～40MPa scope.When intensified pressure,, just can obtain required low-temperature receiver as long as carry out the conversion of compression-resistant material and overall dimensions by 26S Proteasome Structure and Function of the present utility model.Simultaneously, also can be used as the thermal source comprehensive utilization by the thermal current that separates.

Claims (3)

1, a kind of differential pressure refrigeration device comprises compressed air jet pipe, nozzle, expansion chamber, cold and hot gas outlet pipe, it is characterized in that: described expanding chamber is made of the outer solid 1 of opposite opened two halves, and this outer solid 1 inside is a spherical cavity 2; A high pressure snorkel 4 is respectively adorned in the relative both sides of solid 1 outside, and two-supremes force feed tracheae 4 is installed with parallel and symmetrical manner with respect to ball chamber 2 axis; Respectively install a nozzle 5 in the two-supremes force feed tracheae 4, in spherical cavity 2, to send into the high pressure expanded air; Installing one air coolant tube 7 below described spherical cavity 2, to discharge cold air, installing one heat pipe 9 to discharge hot gas, is installed an adjusting lever 12 at these heat pipe 9 places above this spherical cavity 2, to regulate the ratio of hot and cold air flow.

2, differential pressure refrigeration device as claimed in claim 1, the exit portion that it is characterized in that described nozzle 4 are a small-bore straight tube 6, so that gases at high pressure do not enter spherical cavity 2 with having buffering and expand rapidly.

3,, it is characterized in that being lined with one deck polytetrafluoroethyllining lining 3 on described spherical cavity 2 inwalls, to play thermal insulation and corrosion-resisting function as claim 1,2 described differential pressure refrigeration devices.

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