CN101457996A - Refrigeration cycle apparatus and pressure reducing device - Google Patents

Abstract

The invention provides a refrigerating cycle device, comprising: a radiator (2) which radiates heat of high pressure refrigerant that is ejected from a compressor (1); pressure reducers (3, 3a) which reduce pressure of the refrigerant at the downstream of the radiator (2); flow dividers (10, 115) with flow paths which distribute the flow of the refrigerant, the pressure of which is reduced by the pressure reducers, into a plurality flows; an ejector (5) which carries down refrigerant of one side that is distributed by the flow dividers and high-speed refrigerant flows which are ejected from a nozzle part (5a) and attracts refrigerant of the other side from an attracting part (5b) through the high-speed refrigerant flows; an evaporator (8) which carries down and vaporizes the refrigerant of the other side that is distributed by the flow dividers and flows out to the attracting part (5b). Therefore, the flow divider is provided with a distribution stream mechanism which distributes the flow-in refrigerant according to regulated amount.

Description

Refrigerating circulatory device and decompressor

Technical field

The present invention relates to have flow distributor the injector refrigerating circulatory device, and in refrigerating circulatory device, make the decompressor of cold-producing medium puffing.

Background technology

In the past, known as the spy opens the record of 2005-308384 communique, have the refrigerating circulatory device of injector as the mechanism that condensed cold-producing medium is reduced pressure.This injector has: be taken into from than radiator more by the cold-producing medium of side's side of the cold-producing medium stream of the branching portion branch in downstream, with the spray nozzle part of ejection at a high speed; The attraction portion that the cold-producing medium of the opposing party's side of branch is attracted by evaporimeter.

, in described refrigerating circulatory device, when existence is the supercooling liquid phase refrigerant to the cold-producing medium of the spray nozzle part inlet guiding of injector, the problem that nozzle efficiency descends.And then, in order to improve this problem, in the time of will being made as gas-liquid two-phase flow to the cold-producing medium that the inlet of spray nozzle part is supplied with, consider from the efficient aspect of system, must divide pairing refrigerant flow that spray nozzle part is supplied with and the refrigerant flow that attraction portion side is supplied with rightly.

In addition, open the spy and disclose the decompressor (electric expansion valve) that in refrigerating circulatory device, makes the cold-producing medium puffing in the flat 8-159617 communique.This decompressor has: the relief portion that variable refrigerant passage area ground constitutes is a needle valve; Be configured in the upstream side of needle valve, make the rotating flow generating unit (cold-producing medium inflow chamber) that flows the direction of principal axis rotation of cast-over by the cold-producing medium of needle valve decompression.

And, make the stream rotation of cold-producing medium by the rotating flow generating unit, and it flowed into to relief portion, thereby avoid the direct striker pin of cold-producing medium, the vebrato that produces when suppressing the cold-producing medium striker pin to the relief portion inflow.And then, by the centrifugal force of rotating flow, separate the gas-liquid of cold-producing medium, make with respect to vapor phase refrigerant, the liquid phase refrigerant that rotary speed is high seethes with excitement energetically, reduces the pressure loss of the expansion that is accompanied by vapor phase refrigerant.

When the relief portion of this decompressor makes the cold-producing medium puffing, make the pressure energy of cold-producing medium be changed to kinetic energy.Therefore, the effciency of energy transfer of relief portion (below be called decompression efficiency eta n) is by following mathematical expression F1 definition.

ηn＝(Vn ²/2)/Δien …(F1)

Have, Vn is the flow velocity by the cold-producing medium behind the relief portion puffing again, and Δ ien is the slippage of the specific enthalpy when making the cold-producing medium constant entropy ground puffing of per unit weight.In addition, n is when forming relief portion with nozzle for this decompression efficiency eta, is equivalent to generally be called the amount of nozzle efficiency.

According to this mathematical expression F1, increase by the flow velocity Vn that makes the cold-producing medium behind the puffing, can improve the efficiency eta n that reduces pressure.And then, if the decompression efficiency eta n of relief portion is improved,, then can make cold-producing medium constant entropy ground puffing, so can increase the slippage of the specific enthalpy when making the cold-producing medium puffing with the cold-producing medium supersonic speedization of puffing process.

Therefore, if the spy being driven the decompressor of flat 8-159617 communique is applied in the refrigerating circulatory device, then should be able to enlarge the enthalpy difference (refrigerating capacity) of the cold-producing medium between the entrance and exit of evaporimeter of the cold-producing medium evaporation that makes behind the puffing, improve the cycle efficieny (COP) of refrigerating circulatory device.

, in fact, make its work in the refrigerating circulatory device even the decompressor that the spy is opened flat 8-159617 communique is applied to, flow into the situation that the chamber produces the decompressor of rotating flow at cold-producing medium and compare with having used not, cycle efficieny does not improve yet.Therefore, present inventors have investigated its reason, distinguish that reason is that relief portion is made of needle valve.

If as needle valve, the valve body of needle-like (pin) is configured in the refrigerant passage of relief portion inside, then at the interior week of refrigerant passage and the approaching position of periphery of pin,, flows along pin attached on the pin along the cold-producing medium of the interior Zhou Xuanzhuan of refrigerant passage.That is, if cold-producing medium flows along pin, then the rotating flow composition weakens, and the flow velocity of cold-producing medium is increased.

As a result, open in the decompressor of flat 8-159617 communique,, also can't fully improve decompression efficiency eta n even the stream of cold-producing medium is rotated at the upstream side of relief portion the spy.And then, even be applied in the refrigerating circulatory device, also can't fully improve cycle efficieny.

Summary of the invention

The present invention proposes in view of described problem, and one of its purpose is, the gas-liquid two-phase system cryogen of supplying with suitable distribution respectively by to the spray nozzle part side and the attraction portion side of injector is provided, and has the refrigerating circulatory device of high cycle efficieny.

In addition, in view of described problem, another object of the present invention is, improves the decompression efficiency eta n of decompressor.

In addition, another object of the present invention is, in having the refrigerating circulatory device of decompressor, improves cycle efficieny (COP).

According to first example of the present invention, refrigerating circulatory device comprises: suck cold-producing medium, the compressor of boil down to high-pressure refrigerant; Make from the radiator of the heat heat radiation of the described high-pressure refrigerant of compressor ejection; First throttle mechanism with the decompression of the cold-producing medium in radiator downstream; Have to be the flow distributor of the stream of a plurality of streams by the flow distribution of the cold-producing medium of first throttle mechanism decompression; Be taken into a side's who distributes by flow distributor cold-producing medium, spray and formation cold-producing medium stream at a high speed, and flow the injection of refrigerant device that attracts the opposing party from attraction portion by cold-producing medium at a high speed from spray nozzle part; Be taken into the described the opposing party's who distributes by flow distributor cold-producing medium and make its evaporation, the evaporimeter of emitting to attraction portion.And then flow distributor has the distribution stream mechanism of the cold-producing medium that flows into being measured in accordance with regulations distribution.

According to first example of the present invention, by of the cold-producing medium decompression of first throttle mechanism with the radiator downstream, the injector side is supplied with gas-liquid two-phase system cryogen, and the distribution stream mechanism assignment system cryogen by flow distributor, the gas-liquid two-phase system cryogen that can supply with suitable distribution respectively to the spray nozzle part side and the attraction portion side of injector.In view of the above, can improve the efficient of refrigerating circulatory device with injector.

For example, distribution stream mechanism has the first-class path by the cold-producing medium inflow of first throttle mechanism decompression; From this first-class forehearth limb, flow out second circulation flow path of cold-producing medium to vaporizer side; From described first-class forehearth limb, go out the 3rd circulation flow path of cold-producing medium to the injector effluent.At this moment, preferred this first-class path, this second circulation flow path, the 3rd circulation flow path are configured on the roughly same horizontal plane, the stream diameter of this second circulation flow path (φ d2) is bigger than the stream diameter (φ d1) of this first-class path, and also the stream diameter (φ d3) than the 3rd circulation flow path is big.

Stream diameter by having second circulation flow path is bigger than the stream diameter of first-class path, also big distribution stream mechanism than the stream diameter of the 3rd circulation flow path, the refrigerant flow that flows into the 3rd circulation flow path is lacked than the refrigerant flow that flows into second circulation flow path, restriction flows into the refrigerant flow of the spray nozzle part of injector, can improve the efficient of refrigerating circulatory device.

Flow distributor can have the rotating flow formation portion of stream rotation of the cold-producing medium of the distribution of making.At this moment, can make liquid phase refrigerant form rotating flow,, can promote the boiling of liquid phase refrigerant, can improve the efficient of refrigerating circulatory device so the relative cold-producing medium flow velocity in the stream increases.

And then rotating flow forms quality award from the ministry and selects the big stream of stream diameter that has than the stream of upstream side.At this moment, can be formed with the rotating flow that helps the efficient raising by simple structure.In addition, be the flow distributor of desirable value by the rate regulation that adopts the stream diameter before and after enlarging, can regulate recruitment easily based on the relative cold-producing medium flow velocity of rotating flow.

Perhaps, rotating flow formation portion can make the cold-producing medium rotation of the spray nozzle part that flows into injector.At this moment, by the liquid phase refrigerant of rotation being flowed into the spray nozzle part of injector, relative cold-producing medium flow velocity increases, and promotes the boiling of liquid phase refrigerant, can improve nozzle efficiency.

And then, distribute stream mechanism preferably to have the different circulation flow path of height and position of comparing gravity direction with other circulation flow paths.At this moment, can limit the refrigerant flow that flows through the different circulation flow path of the height and position of comparing gravity direction with other circulation flow paths, so, can implement the distribution of the refrigerant flow of flow distributor by simple structure.

According to second example of the present invention, a kind of decompressor is provided, it is applied in the refrigerating circulatory device, comprising: with the relief portion of cold-producing medium puffing; Be configured in the upstream side of relief portion, make the rotating flow generating unit of the stream rotation of the cold-producing medium that flows into to relief portion, relief portion is made of fixed restriction portion.

In view of the above, relief portion is made of fixed restriction portion, so can be attached on the pin etc. to cold-producing medium that relief portion flows into.Therefore, the rotating flow composition of cold-producing medium can not weaken, and by the gas-liquid that centrifugal force separates cold-producing medium, can make the liquid phase refrigerant boiling higher than vapor phase refrigerant rotary speed efficiently.

As a result, can reduce the pressure loss of the expansion that is accompanied by vapor phase refrigerant, can increase from the flow velocity of the cold-producing medium of relief portion outflow, so can effectively improve the decompression efficient of relief portion.

For example, in decompressor, the rotating flow generating unit can have the inflow path that cold-producing medium is flowed into; The outflow pathway that cold-producing medium is flowed out along the direction different with the inflow direction of the cold-producing medium that flows into from the inflow path.At this moment, change, can make the cold-producing medium rotation easily, and can constitute the rotating flow generating unit easily by the flow direction that makes cold-producing medium.

Perhaps, the rotating flow generating unit can have makes the cylindraceous rotating cylinder portion of cold-producing medium in inside rotation, flows into path cold-producing medium is flowed into along the Zhou Fangxiang of rotating cylinder portion, and outflow pathway makes cold-producing medium flow out along the direction of principal axis of rotating cylinder portion.

Perhaps, the rotating flow generating unit can have the refrigerant passage that makes the cold-producing medium inflow and outflow, forms spiral helicine groove at the internal face of refrigerant passage.Like this, even form spiral helicine groove, also can make the cold-producing medium rotation easily at the internal face of refrigerant passage.

In addition, in having the refrigerating circulatory device of this decompressor, the decompression efficient (η n) of relief portion can be improved, the cycle efficieny (COP) of refrigerating circulatory device can be improved.

In the 3rd example of the present invention, refrigerating circulatory device comprises: with the compressor of cold-producing medium compression and ejection; The radiator that will dispel the heat from the high-temperature high-pressure refrigerant of described compressor ejection; Branching portion with the flow branching of described radiator outlet side cold-producing medium; Have and to attract the cold-producing medium of cold-producing medium to attract mouthful, mix the cold-producing medium stream of the high speed of spraying from described fixed nozzle portion and the attraction cold-producing medium that attracts mouthful from described cold-producing medium and the injector of the diffusion portion that makes it to boost by the fixed nozzle portion of a side's of described branching portion branch cold-producing medium puffing, cold-producing medium stream by the high speed of spraying from fixed nozzle portion; Will be by the fixed restriction portion of the opposing party's of described branching portion branch cold-producing medium puffing; Make the downstream cold-producing medium evaporation of described fixed restriction portion, an attraction side evaporimeter that attracts mouthful upstream side to flow out to described cold-producing medium.And then, in refrigerating circulatory device, have: be configured in described branching portion downstream and described fixed nozzle portion's upstream side and make to the first rotating flow generator of the stream rotation of the cold-producing medium that described fixed nozzle portion flows into and be configured in described branching portion downstream and described fixed restriction portion's upstream side and make at least one side in the second rotating flow generator of the stream rotation of the cold-producing medium that described fixed restriction portion flows into.

Have at least one side in the first rotating flow generator and the second rotating flow generator,, can improve the cycle efficieny (COP) of refrigerating circulatory device so can improve the decompression efficient (η n) of at least one side in injector and the fixed restriction portion.

In Figure 15, represent the state of the cold-producing medium of refrigerating circulatory device of the present invention with solid line, dot the state of cold-producing medium of the comparative example refrigerating circulatory device (below be called the comparative example device) of any one party with the first rotating flow generator and second rotating flow generator.

At first, in the refrigerating circulatory device of the 3rd example,,, can make from the flow velocity increase of the cold-producing medium stream of fixed nozzle portion injection with respect to the comparative example device by the first rotating flow generator is set.In view of the above, the puffing process (" e " point of Figure 15 → " f " point) of cold-producing medium of fixed nozzle portion of refrigerating circulatory device that can make the 3rd example is with respect to the puffing process of the fixed nozzle portion of comparative example device (" e " point of Figure 15 → " f ' " point), more near the insentrope of representing with double dot dash line of Figure 15.Therefore, in the refrigerating circulatory device of the 3rd example,, the specific enthalpy of the cold-producing medium behind the puffing only can be reduced the amount of Δ i1 with respect to the comparative example device.

And then, fully increase by making the flow velocity that flows from the cold-producing medium of fixed nozzle portion injection, can increase a cold-producing medium traffic attraction that attracts mouth to attract from cold-producing medium.In view of the above, can also increase recovering energy of injector, so as shown in figure 15, the amount of boost Δ P of the cold-producing medium of diffusion portion also can increase with respect to the amount of boost Δ P ' of comparative example device.As a result, can make the suction of compressor press liter,, can improve cycle efficieny so can reduce the driving power of compressor.

In the refrigerating circulatory device of the 3rd example,,, can increase from the flow velocity of the cold-producing medium stream of fixed nozzle portion injection with respect to the comparative example device by the second rotating flow generator is set.At this moment, the puffing process (" e " point of Figure 15 → " k " point) of cold-producing medium of fixed restriction portion of refrigerating circulatory device that can make the 3rd example is with respect to the puffing process of the fixed restriction portion of comparative example device (" e " point of Figure 15 → " k ' " point), more near the insentrope of representing with double dot dash line of Figure 15.Therefore, in the refrigerating circulatory device of the 3rd example,, the specific enthalpy of the cold-producing medium behind the puffing only can be reduced the amount of Δ i2 with respect to the comparative example device.

As a result, can enlarge the enthalpy difference (refrigerating capacity) of the cold-producing medium between the entrance and exit that attracts the side evaporimeter, improve cycle efficieny.

In the refrigerating circulatory device of described the 3rd example, can have the outflow side evaporimeter that makes the evaporation of injector outflow cold-producing medium.Perhaps, also can have the first rotating flow generator and the second rotating flow generator both sides.At this moment, the first rotating flow generator, the second rotating flow generator and branching portion can be used as rotating flow and produce branching portion one formation.In view of the above, can seek the miniaturization of refrigerating circulatory device.

Rotating flow produces the branching portion that branching portion means the function that has concurrently as the branching portion of the flow branching that makes cold-producing medium, produces function as the band rotating flow of the function of the rotating flow generating unit of the stream rotation that makes the cold-producing medium that flows out from branching portion.For example, rotating flow produces branching portion can have inflow path that cold-producing medium is flowed into, from flowing into forehearth limb and make first outflow pathway that cold-producing medium flows out, second outflow pathway from flowing into forehearth limb and cold-producing medium being flowed out, first outflow pathway and second outflow pathway make cold-producing medium along with flow out to the different direction of the inflow direction that flows into the cold-producing medium that path flows into.In view of the above, change, can easily make the cold-producing medium rotation, and can constitute rotating flow generation branching portion easily by the flow direction that makes cold-producing medium.

For example, the direction of principal axis that flows into path, first outflow pathway and second outflow pathway can be configured on the same horizontal plane, and the passage diameters (φ d3) of the passage diameters of first outflow pathway (φ d2) and second outflow pathway forms than the passage diameters (φ d1) that flows into path biglyyer.At this moment, make easily from flowing into the cold-producing medium rotation of path to first outflow pathway and the inflow of second outflow pathway.

In addition, the direction of principal axis that flows into path, first outflow pathway and second outflow pathway is configured on the same horizontal plane, thus with the cold-producing medium flow branching time, be difficult to be subjected to the influence of gravity, can be rightly with cold-producing medium branch.The term of same horizontal plane of the present invention is not only to mean identical horizontal plane, but also comprises the meaning of the very little different face that produces owing to mismachining tolerance and rigging error.

Description of drawings

Fig. 1 is the ideograph of structure of the refrigerating circulatory device of expression first embodiment of the invention～the 4th embodiment.

Fig. 2 is the vertical view of internal structure of the flow distributor of expression first embodiment.

Fig. 3 is that the III direction of Fig. 2 is to view.

Fig. 4 is the vertical view of internal structure of the flow distributor of expression second embodiment.

Fig. 5 is that the V direction of Fig. 4 is to view.

Fig. 6 is in expression first embodiment～the 4th embodiment, is formed the stereogram of the velocity of the rotating flow that portion (rotating flow forms mechanism) forms by rotating flow.

Fig. 7 is the stereogram of the interior spiral groove of the stream of expression formation rotating flow formation portion (rotating flow forms mechanism).

Fig. 8 is the vertical view of internal structure of the flow distributor of expression the 3rd embodiment.

Fig. 9 is that the IX direction of Fig. 8 is to view.

Figure 10 is the vertical view of internal structure of the flow distributor of expression the 4th embodiment.

Figure 11 is that the XI direction of Figure 10 is to view.

Figure 12 is the overall structure figure of the refrigerating circulatory device of the 5th embodiment.

Figure 13 is the stereogram that the rotating flow of the 5th embodiment produces branching portion.

Figure 14 is the XIV-XIV cutaway view of Figure 13.

Figure 15 is the mollier diagram of state of the cold-producing medium of expression the 5th embodiment.

Figure 16 is the stereogram that the rotating flow of the 6th embodiment produces branching portion.

Figure 17 is the stereogram that the rotating flow of the 7th embodiment produces branching portion.

Figure 18 is the stereogram of the rotating flow generating unit of the 8th embodiment.

Figure 19 is the stereogram of the rotating flow generating unit of the 9th embodiment.

Figure 20 is the curve map of expression based on the raising effect of the decompression efficiency eta n of the kind of throttle mechanism.

The specific embodiment

(first embodiment)

Fig. 1 represents to have an example of the refrigerating circulatory device of injector of the present invention.This refrigerating circulatory device has compressor 1, make radiator 2 from the heat heat radiation of the high-pressure refrigerant of this compressor 1 ejection, with the first throttle mechanism of the cold-producing medium decompression in these radiator 2 downstreams be pressure reducer 3, to have to be the flow distributor 10 of a plurality of circulation flow paths of a plurality of streams by the flow distribution of the cold-producing medium of pressure reducer 3 decompressions.

And then refrigerating circulatory device comprises: be taken into a side's who is distributed by flow distributor 10 cold-producing medium, spray from nozzle 5a, form cold-producing medium stream at a high speed, and attract the opposing party's injection of refrigerant device 5 by cold-producing medium stream at a high speed from the 5b of attraction portion; Be taken into the opposing party's who distributes by flow distributor 10 cold-producing medium and make its evaporation, second evaporimeter 8 of emitting to the 5b of attraction portion; Be taken into from the cold-producing medium of injector 5 ejections, and first evaporimeter 7 that carries out heat exchange between the extraneous air.First evaporimeter 7 and second evaporimeter 8 are provided with first evaporimeter 7 in the inside of box 11 as the wind upside.By not shown pressure fan, air that two evaporimeters are carried and cold-producing medium carry out heat exchange and are cooled forcibly, carry to the air-conditioning object space.

In addition, refrigerating circulatory device has the high-pressure refrigerant that flows and is drawn into the inner heat exchanger 6 that the low pressure refrigerant in the compressor 1 carries out heat exchange between radiator 2 and pressure reducer 3.By the mutual heat exchange of the cold-producing medium of this inner heat exchanger 6, the high-pressure refrigerant that flows through between radiator 2 and the pressure reducer 3 is cooled, so can increase the enthalpy difference (cooling capacity) of the refrigerant inlet and the cold-producing medium between the outlet of first evaporimeter 7 and second evaporimeter 8.

Compressor 1 sucks, compression and ejection cold-producing medium, and by electromagnetic clutch and band, being travelled by vehicle drives with engine rotation.Compressor 1 for example uses according to ramp type variable displacement compressor that can variable continuously control ejection capacity from the control signal of outside.

Have, in the compressor 1 of present embodiment, the adjustment of the pressure by the swash plate chamber can vary continuously to the ejection capacity roughly near 0% from 100% again.Therefore, by the ejection capacity being reduced to roughly near 0%, compressor 1 can become the work halted state in fact.Therefore, also can adopt the structure of the no-clutch that the rotating shaft of compressor 1 is connected all the time by pulley, band V and vehicle motor.

Radiator 2 is by carrying out heat exchange between high-pressure refrigerant that sprays from compressor 1 and the car outdoor air by not shown pressure fan forced conveyance, making the high-pressure refrigerant heat radiation and the heat exchanger of condensation.

Pressure reducer 3 have will be undertaken by radiator 2 function of high-pressure refrigerant decompression of heat exchange, for example constitute by the flow control valve of the flow of regulating cold-producing medium etc.By control device (not shown) control pressure reducer 3, high-pressure refrigerant can be become the state of gas-liquid two-phase flow, make it flow into flow distributor 10.At this moment gas-liquid two-phase flow is according to the aridity and the flow velocity of cold-producing medium, presents the form of stratified flow, line streaming, slag stream, in addition, presents gas refrigerant and is positioned at the form that top, liquid refrigerant are positioned at the separated flow up and down of below.Have, pressure reducer 3 can be the flow control valve of the electric of the variable control refrigerant flow of energy, also can be fixed flow control valve again.

Flow distributor 10 is cube or the cuboids that form a plurality of circulation flow paths in inside, has the distribution stream mechanism of the cold-producing medium that is flowed into by pressure reducer 3 decompressions being measured in accordance with regulations distribution.As shown in Figure 2, flow distributor 10 have first-class path 12 that the cold-producing medium by pressure reducer 3 decompression flows into, from first-class path 12 branches and to second evaporimeter, 8 effluents go out cold-producing medium second circulation flow path 13, go out the 3rd circulation flow path 14 of cold-producing medium from first-class path 12 branches and to the spray nozzle part 5a of injector 5 effluent, these circulation flow paths constitute and distribute stream mechanisms.

First-class path 12, second circulation flow path 13, the 3rd circulation flow path 14 extend respectively as shown in Figure 3 in the horizontal direction, and they are configured on the roughly same horizontal plane.In other words, first-class path 12 and the 3rd circulation flow path 14 are set at the stream center line 15 of the stream direction of principal axis elongation of first-class path 12 roughly consistent with the stream center line 16 in the stream direction of principal axis elongation of the 3rd circulation flow path 14.And then, also be configured on the roughly same horizontal plane that comprises stream center line 15 and stream center line 16 at the stream center line of the stream direction of principal axis of second circulation flow path 13 elongation.That is, the whole circulation flow paths that are formed on the inside of flow distributor 10 are arranged on the position with respect to the gravity direction equal height.

First-class path 12, second circulation flow path 13, the 3rd circulation flow path 14 all are stream roughly cylindraceous, and each stream diameter is φ d1, φ d2, φ d3.The relation of φ d1, φ d2, φ d3 is φ d2〉φ d1 and φ d2〉φ d3.That is, the stream diameter phi d2 of second circulation flow path is bigger than the stream diameter phi d1 of first-class path, and also the stream diameter phi d3 the earth than the 3rd circulation flow path forms.Have, in Fig. 2, second circulation flow path 13 and the 3rd circulation flow path 14 are the form of rectangular-shaped branch with respect to the form of first-class path 12 branches again, but two circulation flow paths also can be the forms of the symmetric part of matrix of diffusion type.

The stream diameter phi d2 of second circulation flow path is bigger than the stream diameter phi d1 of first-class path, when also forming than the stream diameter phi d3 the earth of the 3rd circulation flow path, compares when forming with each stream equal diameters ground, can reduce the refrigerant flow to 14 inflows of the 3rd circulation flow path.Satisfied the stream of wanting to control refrigerant flow and wanted to increase the distribution stream mechanism of relation of the stream of refrigerant flow by such formation, can obtain the refrigerating circulatory device of excellent in efficiency with optimum flow ratio.In addition, the distribution stream mechanism that constitutes like this considers the nozzle efficiency of injector and the refrigerating capacity of evaporimeter, and the coefficient of performance of system is become to greatest extent.

In addition, flow distributor 10 has described distribution stream mechanism, can be suppressed at gravity causes in second circulation flow path 13 and the 3rd circulation flow path 14 the vapor phase refrigerant and the skewness of liquid phase refrigerant, forms their bias change symmetrically.And, can reduce the mobile influence that brings of gas-liquid two-phase flow, can be with required ratio assignment system cryogen.For example, the skewness state of vapor phase refrigerant and liquid phase refrigerant produces in each stream equally, and then even the operating condition of circulation changes, this skewness state changes in each stream similarly.

And then flow distributor 10 has the rotating flow formation portion (rotating flow forms mechanism) of stream rotation of the cold-producing medium of the distribution of making.By having the bigger stream of stream diameter, constitute this rotating flow formation portion than the stream of upstream side.The rotating flow formation portion of present embodiment is that the stream diameter phi d1 of first-class path 12 forms biglyyer with the stream diameter phi d2 of second circulation flow path 13 than the stream of upstream side.

Fig. 6 is the stereogram of the velocity of the rotating flow 26 that formed by the rotating flow portion of formation of expression.When the gas-liquid two-phase system cryogen that flows into first-class path 12 flows into second circulation flow path 13, as shown in Figure 6, act on to oblique the place ahead at the centrifugal force of the radial direction foreign side of stream effect internal face, help the generation of the velocity V of reality along the expansion of second circulation flow path 13.At this moment, liquid phase refrigerant mainly rotates.This is because liquid phase refrigerant is subjected to The Effect of Inertia Force easily.

Here, velocity V is the making a concerted effort of velocity composition V2 of the radial direction of the axial velocity composition of stream V1, stream.In addition, what no matter rotating flow produced has or not, and the refrigerant flow that flows through stream is identical, so the stream axial velocity composition of velocity composition V1 during with non-rotary stream equates.That is the absolute value that along right angle orientation run through the refrigerant velocities of flow path cross sectional area of the absolute value V of the refrigerant velocities of the reality when, rotating flow produces when not producing rotating flow compared and wanted big.

Therefore, when producing rotating flow, the relative cold-producing medium flow velocity in the stream increases, and is subjected to the upset from the stream internal face easily, promotes the boiling of liquid phase refrigerant.In addition, if produce rotating flow or mixed flow in the gas-liquid two-phase system cryogen in stream, the drop of cold-producing medium is with regard to sectionalization, and the speed difference of gas-liquid reduces, and the stream in the stream is near homogeneous flow.In view of the above, liquid phase refrigerant seethes with excitement easily, and the coefficient of performance of system also improves.

Have, rotating flow formation portion can be made of the spiral groove 28 of the internal face that is formed on stream as shown in Figure 7 again.If cold-producing medium flows in the stream with spiral groove 28, just flow by these spiral groove 28 guiding ground, form rotating flow shown in Figure 6.In addition, rotating flow formation portion also can replace this spiral groove 28, and by presenting same helical form, the helical form rib outstanding to the inside from internal face constitutes.

Flow distributor 10 is made of the material identical with refrigerant piping (for example aluminium), and in order to become the stream of above-mentioned required size shape, cutting forms the piece of aluminum, perhaps by aluminium die casting, forge and form, thereby make.In addition, flow distributor 10 also can be made of brass or copper.The first-class path 12 of flow distributor 10, second circulation flow path 13, the 3rd circulation flow path 14 respectively with each the refrigerant piping soldered joint that is connected.

Then, the refrigerant piping that is connected with the 3rd circulation flow path 14 is connected with injector 5.This injector 5 is the mechanisms of decompressor with cold-producing medium decompression, and also is to carry out the cold-producing medium cycling mechanism that the fluid of the circulation of cold-producing medium is carried by the sucking action (involution) with the cold-producing medium stream of ejection at a high speed.

In injector 5, have: be taken into a side's who distributes by flow distributor 10 cold-producing medium, this area of passage is limited in very little, the spray nozzle part 5a of constant entropy ground puffing cold-producing medium; Dispose communicatively with the cold-producing medium ejiction opening of spray nozzle part 5a, attract the 5b of attraction portion from the vapor phase refrigerant of second evaporimeter 8.

Mixing is set in the downstream of spray nozzle part 5a and the 5b of attraction portion flows and come the mixing portion of the attraction cold-producing medium of the 5b of self-gravitation portion from the cold-producing medium of the high speed of spray nozzle part 5a.And, in the diffusion portion of the downstream of mixing portion configuration formation boosting section.This diffusion portion forms the shape that the area of passage with cold-producing medium increases gradually, has cold-producing medium stream is slowed down, and the effect that refrigerant pressure is risen, the speed energy that is about to cold-producing medium is transformed to the function of pressure energy.

Connect first evaporimeter 7 in the direction of refrigerant flow downstream of diffusion portion.First evaporimeter 7 is that air and the cold-producing medium that will carry forcibly carry out heat exchange, makes the cold-producing medium evaporation, the heat dump of performance heat-absorbing action.

Direction of refrigerant flow downstream at first evaporimeter 7 connects accumulator (accumulator) 9.This accumulator 9 is the gas-liquid separators that cold-producing medium are separated into vapor phase refrigerant and liquid phase refrigerant.The vapor phase refrigerant outlet side of accumulator 9 is connected with the suction side of compressor 1 by inner heat exchanger 6.

Secondly, with refrigerant piping that second circulation flow path 13 is connected in to dispose second throttle mechanism be capillary 4, more disposing second evaporimeter 8 than capillary 4 by downstream portion.Capillary 4 carries out flow adjustment and the decompression to the cold-producing medium of second evaporimeter, 8 inflows, is made of for spiral helicine tubule coiling.Have, second throttle mechanism can be made of fixed orifices such as throttle orifices again.

Second evaporimeter 8 is to make the cold-producing medium evaporation, the heat dump of performance heat-absorbing action, and in the present embodiment, first evaporimeter 7 and second evaporimeter 8 are assembled into Construction integration.Particularly, constituting each constituent part of first evaporimeter 7 and second evaporimeter 8 with aluminium, is Construction integration by soldered joint.

Not shown control device is made of the well-known microcomputer and the peripheral circuit thereof that comprise CPU, ROM and RAM etc.This control device carries out various computings, processing according to the control program of storing in this ROM, controls the work of various machines.In addition, in control device input from various sensor groups' detection signal, from the various operation signals of guidance panel (not shown).In addition, guidance panel is provided with the temperature setting switch of the chilling temperature of setting the cooling object space and sends the air-conditioning work switch etc. of the working instruction signal of compressor 1.

Below, with the action of above-mentioned structure explanation present embodiment.If the air-conditioning work switch becomes conducting state, then by the control output of control device, to the electromagnetic clutch energising of compressor 1, electromagnetic clutch becomes connection status, travels from vehicle and with engine compressor 1 is transmitted rotary driving force.

Then, if from control device according to control program to the electromagnetic type capacity control drive of compressor 1 output control electric current I n, compressor 1 just sucks vapor phase refrigerant, and compresses and spray.

Compress the vapor phase refrigerant inflow radiator 2 of the HTHP of ejection from compressor 1.In radiator 2, the cold-producing medium of HTHP by outer air cooling but and condensation.High-pressure refrigerant after the heat radiation that radiator 2 flows out carries out heat exchange with the vapor phase refrigerant of the low pressure that flows out from accumulator 9 inner heat exchanger 6.

Then, the cold-producing medium of heat exchanger 6 outflows internally to required pressure, forms gas-liquid two-phase flow by pressure reducer 3 puffings.This gas-liquid two-phase system cryogen flows into to flow distributor 10, is the cold-producing medium stream that cold-producing medium flows, other direction capillary 4 flows into that a direction injector 5 flows into suitable assignment of traffic respectively.

Here, the first-class path 12 that flow distributor 10 is configured to form in inside, second circulation flow path 13, the 3rd circulation flow path 14 so the liquid phase refrigerant that flows into to flow distributor 10 is not subjected to the influence of gravity, can appropriately be shunted all on same horizontal plane roughly.

Therefore, in flow distributor 10, the ratio approximate equality ground assignment system cryogen of the liquid phase refrigerant of the ratio of the liquid phase refrigerant of the cold-producing medium that goes out to the spray nozzle part 5a of injector 5 effluent and the cold-producing medium that goes out to second evaporimeter, 8 effluents.As a result, liquid phase refrigerant flows into the spray nozzle part 5a side of injector 5 reliably.

Then, flow into the cold-producing medium of injector 5 by spray nozzle part 5a decompression, expansion.When this puffing, the pressure energy of cold-producing medium is transformed to the speed energy, so cold-producing medium becomes ejection at a high speed from the ejiction opening of spray nozzle part 5a.Then, according to the cold-producing medium sucking action of this cold-producing medium discharging jet, attract cold-producing medium behind the passing through of second evaporimeter 8 from the 5b of attraction portion.

Mix in the mixing portion in the downstream of spray nozzle part 5a from the cold-producing medium of spray nozzle part 5a ejection with by the cold-producing medium that the 5b of attraction portion attracts, flow into diffusion portion.In this diffusion portion, because the expansion of the area of passage, the speed energy of cold-producing medium is transformed to pressure energy, so the pressure of cold-producing medium rises.

Here, in the present embodiment, the spray nozzle part 5a side ground that liquid phase refrigerant flows into injector 5 reliably constitutes, so diffusion portion brings into play boost capability easily, can suppress the deterioration of the running efficiency of circulation.

Then, the cold-producing medium that flows out from the diffusion portion of injector 5 flows into first evaporimeter 7.In first evaporimeter 7, low pressure refrigerant absorbs heat from wind pushing air and evaporates.Then, flow into accumulator 9, be separated into vapor phase refrigerant and liquid phase refrigerant by the cold-producing medium behind first evaporimeter 7.

Then, the vapor phase refrigerant that flows out from accumulator 9 flows into to inner heat exchanger 6, carries out heat exchange with high-pressure refrigerant.Then, the vapor phase refrigerant of heat exchanger 6 outflows is internally sucked by compressor 1 and recompresses.

On the other hand, the cold-producing medium that goes out to second evaporimeter, 8 effluents is reduced pressure by capillary 4, becomes low pressure refrigerant, and this low pressure refrigerant flows into to second evaporimeter 8.In second evaporimeter 8, the low pressure refrigerant of inflow is from being evaporated by the wind pushing air heat absorption of first evaporimeter, 7 coolings.Then, attract, mix with liquid phase refrigerant, flow into first evaporimeter 7 by spray nozzle part 5a in mixing portion with the 5b of attraction portion of the injected device 5 of cold-producing medium of second evaporimeter 8 evaporation.

Like this, the flow distributor 10 of the refrigerating circulatory device of present embodiment has the distribution stream mechanism that distributes the cold-producing medium that flows into ormal weight.And this distribution stream mechanism has: the first-class path 12 that flows into by the cold-producing medium of pressure reducer 3 decompression, from these first-class path 12 branches and to second evaporimeter, 8 effluents go out second circulation flow path 13 of cold-producing medium, from first-class path 12 branches and go out the 3rd circulation flow path 14 of cold-producing medium to injector 5 effluents.This first-class path 12, second circulation flow path 13, the 3rd circulation flow path 14 are configured on the roughly same horizontal plane, the stream diameter phi d2 of second circulation flow path 13 is bigger than the stream diameter phi d1 of first-class path 12, and also the stream diameter phi d3 the earth than the 3rd circulation flow path 14 forms.

According to this structure, the refrigerant flow that flows into to the 3rd circulation flow path 14 lacks than the refrigerant flow that flows into to second circulation flow path 13, to the refrigerant flow that the spray nozzle part 5a of injector 5 flows into, can distribute refrigerant flow by restriction rightly.

In addition, flow distributor 10 has the rotating flow formation portion of stream rotation of the cold-producing medium of the distribution of making, and this rotating flow forms quality award from the ministry choosing and is made of the big stream of stream diameter than the stream of upstream side.

When adopting this structure, because the formation of rotating flow, the relative cold-producing medium flow velocity in the stream increases, and is subjected to the upset from the stream internal face easily, can promote the boiling of liquid phase refrigerant, improves the efficient of refrigerating circulatory device.In addition, can constitute rotating flow by simple structure.In addition, be required value with the rate regulation that enlarges the stream diameter of front and back, can regulate recruitment easily based on the relative cold-producing medium flow velocity of rotating flow.

In addition, the cold-producing medium that is distributed by flow distributor 10 offers before second evaporimeter 8, preferably by capillary 4 puffings.At this moment, can adjust the refrigerant flow that flows to the 5b of the attraction portion side of injector 5 from flow distributor 10 closely, control so can further improve the efficient ground of refrigerating circulatory device.

(second embodiment)

Second embodiment uses Fig. 4 and Fig. 5 that the structure of flow distributor 20 is described.Fig. 4 is the vertical view of internal structure of the flow distributor of expression present embodiment, and Fig. 5 is that the V direction of Fig. 4 is to view.Have, the circulation that illustrates in the refrigerating circulatory device of application traffic distributor 20 and first embodiment is same again.

Flow distributor 20 is that with the difference of flow distributor 10 having the cold-producing medium rheology to the spray nozzle part 5a of injector 5 side inflow is the structure of rotating flow.Present embodiment is about other structures, and is same with first embodiment, has same action effect.

As shown in Figure 4, flow distributor 20 has: the first-class path 22 that flows into by the cold-producing medium of pressure reducer 3 decompression, from first-class path 22 branches and to second evaporimeter, 8 effluents go out second circulation flow path 23 of cold-producing medium, from first-class path 22 branches and the 3rd circulation flow path 24 that is communicated with to the spray nozzle part 5a of injector 5 side, the 4th circulation flow path 25 that will go out to the spray nozzle part 5a of injector 5 effluent by the cold-producing medium of the 3rd circulation flow path 24, these circulation flow paths constitute and distribute stream mechanisms.

First-class path 22, second circulation flow path 23, the 3rd circulation flow path 24, the 4th circulation flow path 25 extend respectively as shown in Figure 5 in the horizontal direction, and they are configured on the roughly same horizontal plane.In other words, first-class path 22 and the 3rd circulation flow path 24 are set at the stream center line 15 of the stream direction of principal axis elongation of first-class path 22 roughly consistent with the stream center line 16 in the stream direction of principal axis elongation of the 3rd circulation flow path 24.And then, also be configured on the roughly same horizontal plane that comprises stream center line 15 and stream center line 16 at the stream center line of the stream direction of principal axis of second circulation flow path 23 elongation with at the stream center line of the stream direction of principal axis elongation of the 4th circulation flow path 25.That is, the whole circulation flow paths that are formed on the inside of flow distributor 20 are arranged on the position with respect to the gravity direction equal height.

First-class path 22, second circulation flow path 23, the 3rd circulation flow path 24, the 4th circulation flow path 25 all are stream roughly cylindraceous, and each stream diameter is φ d1, φ d2, φ d3, φ d4.The relation of φ d1, φ d2, φ d3 is φ d2〉φ d1, φ d2〉φ d3, φ d4〉φ d3.That is, the distribution stream mechanism of flow distributor 20 compares with the distribution stream mechanism of flow distributor 10, and difference is that the stream diameter phi d4 of the 4th circulation flow path is bigger than the stream diameter phi d3 of the 3rd circulation flow path.

The rotating flow formation portion of present embodiment is that the stream diameter phi d1 of first-class path 22 forms biglyyer with the stream diameter phi d2 of second circulation flow path 23 than the stream of upstream side, with the stream diameter phi d4 of the 4th circulation flow path 25 than the stream of upstream side promptly the stream diameter phi d3 of the 3rd circulation flow path 24 form biglyyer.

Therefore, at second circulation flow path 23 that goes out cold-producing medium to second evaporimeter, 8 effluents, go out in the 4th circulation flow path 25 of cold-producing medium to the spray nozzle part 5a of injector 5 effluent, cold-producing medium rheology in the stream is a rotating flow, as shown in Figure 6, relative refrigerant velocities in the stream becomes big, be subjected to upset easily, can promote the boiling of liquid phase refrigerant from the stream internal face.

Like this, in the flow distributor 20 of present embodiment, make the cold-producing medium rotation that flows into to the spray nozzle part 5a of injector 5.When adopting this structure, make the spray nozzle part 5a of the liquid phase refrigerant inflow injector 5 of rotation, relative cold-producing medium flow velocity increases, and promotes the boiling of liquid phase refrigerant, and the expansion-loss energy increases, and can improve nozzle efficiency.

(the 3rd embodiment)

The 3rd embodiment uses Fig. 8 and Fig. 9, and the structure of flow distributor 30 is described.Fig. 8 is the vertical view of internal structure of the flow distributor of expression present embodiment, and Fig. 9 is that the IX direction of Fig. 8 is to view.Have, the circulation that illustrates in the refrigerating circulatory device of application traffic distributor 30 and first embodiment is same again.

Flow distributor 30 is with the difference of flow distributor 20, is arranged on other circulation flow paths to the circulation flow path of the flow of refrigerant of the spray nozzle part 5a of injector 5 side inflow and compares, high position on the weight direction.Present embodiment is about other structures, and is same with first and second embodiments, has same action effect.

As shown in Figure 8, flow distributor 30 has equally with flow distributor 20: the first-class path 32 that flows into by the cold-producing medium of pressure reducer 3 decompression, from first-class path 32 branches and to second evaporimeter, 8 effluents go out second circulation flow path 33 of cold-producing medium, from first-class path 32 branches and the 3rd circulation flow path 34 that is communicated with to the spray nozzle part 5a of injector 5 side, the 4th circulation flow path 35 that will go out to the spray nozzle part 5a of injector 5 effluent by the cold-producing medium of the 3rd circulation flow path 34, these circulation flow paths constitute distribution stream mechanisms.

As shown in Figure 9, the 3rd circulation flow path 34 in first-class path 32, second circulation flow path 33, the 3rd circulation flow path 34, the 4th circulation flow path 35 is compared with other circulation flow paths with the 4th circulation flow path 35, is arranged on position high on the gravity direction.That is, the 3rd circulation flow path 34 is during from first-class path 32 branches, and this stream inlet is configured in the position that is moved upward predetermined distance.In other words, compare with stream center line 37, be positioned at the position of the predetermined distance of below in the stream direction of principal axis elongation of the 3rd circulation flow path 34 at the stream center line 36 of the stream direction of principal axis of first-class path 32 elongation.

Have, first-class path 32, second circulation flow path 33 are configured on the roughly same horizontal plane again.In addition, the 3rd circulation flow path 34, the 4th circulation flow path 35 are configured in and are positioned at than the horizontal plane at first-class path 32, second circulation flow path, 33 places more by on the horizontal plane of top.

The distribution stream mechanism of present embodiment has and compares the 3rd circulation flow path 34, the 4th circulation flow path 35 that is arranged on position higher on the gravity direction with other circulation flow paths.By having this distribution stream mechanism, the refrigerant flow that flows into the 3rd circulation flow path 34 is lacked, the refrigerant flow that can limit, appropriate distribution flows into the spray nozzle part 5a of injector 5 than the refrigerant flow that flows into second circulation flow path 33.

Like this, the flow distributor 30 of present embodiment has with other circulation flow paths to be compared, and the height and position of gravity direction is positioned at the 3rd circulation flow path 34, the 4th circulation flow path 35 of top.When adopting this structure, can implement the flow adjustment of the refrigerant flow of minimizing the 3rd circulation flow path 34, the 4th circulation flow path 35 by simple structure.

(the 4th embodiment)

The 4th embodiment uses Figure 10 and Figure 11 that the structure of flow distributor 40 is described.Figure 10 is the vertical view of internal structure of the flow distributor of expression present embodiment, and Figure 11 is that the XI direction of Figure 10 is to view.Have, the circulation that illustrates in the refrigerating circulatory device of application traffic distributor 40 and first embodiment is same again.

Flow distributor 40 is that with the difference of flow distributor 30 circulation flow path that the cold-producing medium of the spray nozzle part 5a side of inflow injector 5 flows through is compared with other circulation flow paths, is arranged on position low on the weight direction.Present embodiment is about other structures, and is same with first and second embodiments, has same effect and effect.

As shown in figure 10, flow distributor 40 has equally with flow distributor 30: the first-class path 42 that flows into by the cold-producing medium of pressure reducer 3 decompression, from first-class path 42 branches and to second evaporimeter, 8 effluents go out second circulation flow path 43 of cold-producing medium, from first-class path 42 branches and the 3rd circulation flow path 44 that is communicated with to the spray nozzle part 5a of injector 5 side, the 4th circulation flow path 45 that will go out to the spray nozzle part 5a of injector 5 effluent by the cold-producing medium of the 3rd circulation flow path 44, these circulation flow paths constitute distribution stream mechanisms.

As shown in figure 11, the 3rd circulation flow path 44 is compared with other circulation flow paths with the 4th circulation flow path 45, is arranged on position low on the gravity direction.That is, the 3rd circulation flow path 44 is during from first-class path 42 branches, and this stream inlet is configured in the position of mobile predetermined distance downwards.In other words, compare with stream center line 47, be positioned at the position of the predetermined distance of top in the stream direction of principal axis elongation of the 3rd circulation flow path 44 at the stream center line 46 of the stream direction of principal axis of first-class path 42 elongation.

Have, first-class path 42, second circulation flow path 43 are configured on the roughly same horizontal plane again.In addition, the 3rd circulation flow path 44, the 4th circulation flow path 45 are configured in and are positioned at than the horizontal plane at first-class path 42, second circulation flow path, 43 places more by on the horizontal plane of below.

Like this, the flow distributor 40 of present embodiment has with other circulation flow paths to be compared, and the height and position of gravity direction is positioned at the 3rd circulation flow path 44, the 4th circulation flow path 45 of below.When adopting this structure, can implement the flow adjustment of the refrigerant flow of minimizing the 3rd circulation flow path 44, the 4th circulation flow path 45 by simple structure.

(the 5th embodiment)

According to Figure 12～Figure 15, the 5th embodiment of the present invention is described.Figure 12 is the overall structure figure that refrigerating circulatory device of the present invention is applied in the example in the air conditioner for vehicles.The refrigerating circulatory device of present embodiment is the ejector cycle device with injector 5 as shown in figure 12.

At first in refrigerating circulatory device, compressor 1 sucks cold-producing medium, and compression and spraying, and by pulley and band, travels with engine (not shown) transmission of drive force from vehicle, and is driven in rotation.

As this compressor 1, can adopt according to the variation of ejection capacity and can adjust any of fixed capacity type compressor that the variable displacement compressor of cold-producing medium ejection ability or the work ratio that intermittently makes compressor operating by electromagnetic clutch change and adjust cold-producing medium ejection ability.In addition, as compressor 1,, just can adjust cold-producing medium ejection ability by the rotating speed adjustment of motor if use motor compressor.

Cold-producing medium ejection side at compressor 1 is connected with radiator 2.Radiator 2 is to make from the high-pressure refrigerant of compressor 1 ejection and the outer gas of being carried by not shown cooling fan (car outdoor air) to carry out heat exchange, the cooling heat exchanger of cooling high-pressure refrigerant.

In the refrigerating circulatory device of present embodiment, as cold-producing medium, adopt the cold-producing medium of freon class, constitute the subcritical cycle that the high-pressure side refrigerant pressure is no more than the critical pressure of cold-producing medium.Therefore, radiator 2 is as the condenser of condensation of refrigerant is played a role.

Outlet side at radiator 2 connects accumulator 2a.This accumulator 2a is the container shapes of lengthwise, and as the gas-liquid of separating cold-producing medium, the gas-liquid separator of storing the residue liquid phase refrigerant in the circulation works.Have, in the present embodiment, accumulator 2a and radiator 2 are wholely set again.

In addition, as radiator 2, adopt have the condensation that is positioned at cold-producing medium stream upstream side with heat exchange department, import from this condensation with the cold-producing medium of heat exchange department and separate the gas-liquid of cold-producing medium accumulator, will be from the condenser of the overcooled supercooling of the saturated liquid phase refrigerant of this accumulator with the cold type of so-called mistake of heat exchange department.

Bottom side setting at accumulator 2a exports the liquid phase refrigerant of liquid phase refrigerant outflow, connects the high-pressure side refrigerant flow path 6a of inner heat exchanger 6 in this liquid phase refrigerant outlet.Inner heat exchanger 6 carries out heat exchange between radiator 2 outlet side cold-producing mediums by high-pressure side refrigerant flow path 6a and the compressor 1 suction side cold-producing medium by low-pressure side refrigerant flow path 6b.

As the concrete structure of this inner heat exchanger 6, can adopt various structures, but in the present embodiment, adopt the heat converter structure of 2 heavy tubular types.More specifically, become the structure that forms the inside tube of low-pressure side refrigerant flow path 6b in the configuration of the inboard of the outboard tube that forms high-pressure side refrigerant flow path 6a.

Outlet side at the high-pressure side of inner heat exchanger 6 refrigerant flow path 6a connects expansion valve 3a.This expansion valve 3a will be the middle mechanism of decompressor of pressing from the high pressure liquid phase refrigerant decompression that accumulator 2a flows out, and also be the flow guiding mechanism of adjusting the flow of the cold-producing medium that effluent downstream goes out.As this expansion valve 3a, can adopt the flow rate regulating valve of electric that can variable control refrigerant passage area or fixed flow rate regulating valve etc.

Downstream at expansion valve 3a is connected with: the rotating flow that has concurrently as the function of the rotating flow generator of the stream rotation of the cold-producing medium that flows into the function of the branching portion of the flow branching of cold-producing medium, as the 5a of fixed nozzle portion that makes the fixed restriction portion 19 described rearwards and injector 5 produces branching portion 115.Rotating flow produces branching portion 115 and also has the function of flow distributor.About the details of this rotating flow generation branching portion 115, according to Figure 13,14 explanations.Figure 13 is the approximate three-dimensional map that rotating flow produces branching portion 115, and Figure 14 is the XIV-XIV cutaway view of Figure 13.

Rotating flow produces branching portion 115 to have: the inflow pipe arrangement 116 (inflow path) that cold-producing medium is flowed into; From flowing into pipe arrangement 116 branches, the first outflow pipe arrangement 117 (first outflow pathway) that fixed restriction portion 19 effluents that cold-producing medium is described rearwards go out; From flowing into pipe arrangement 116 branches, what the 5a of the fixed nozzle portion effluent of the injector 5 that cold-producing medium is described rearwards went out second flows out pipe arrangement 118 (second outflow pathway).

And then first direction of principal axis that flows out the pipe arrangement 117 and the second outflow pipe arrangement 118 flows into pipe arrangement 116, the first outflow pipe arrangement 117 and second direction of principal axis that flows out pipe arrangement 118 and is configured on the same horizontal plane towards perpendicular to the axial direction that flows into pipe arrangement 116.

Like this, make from the cold-producing medium that flows into pipe arrangement 116 inflows and flow out pipe arrangement 118 outflows, thereby the flow direction of cold-producing medium is changed, so shown in thick-line arrow B, the C of Figure 13, the stream of cold-producing medium is rotated from the first outflow pipe arrangement 117 and second.

Promptly, the cold-producing medium that is become gas-liquid two-phase state by expansion valve 3a decompression is from flowing into pipe arrangement 116 when first flows out pipe arrangement 117 and 118 inflows of the second outflow pipe arrangement, compare with vapor phase refrigerant, the easier liquid phase refrigerant of inertia force influence that is subjected to flows along first internal face that flows out the pipe arrangement 117 and the second outflow pipe arrangement 118.In view of the above, can easily make the stream rotation of cold-producing medium.

Therefore, in the present embodiment, at the branching portion Z of the connecting portion formation that flows into the pipe arrangement 116 and the first outflow pipe arrangement 117 with the flow branching of cold-producing medium, flow out the pipe arrangement 117 formations second rotating flow generator by flowing into pipe arrangement 116, first, flow out pipe arrangement 118 by inflow pipe arrangement 116, second and constitute the first rotating flow generator.That is, the first rotating flow generator, the second rotating flow generator and branching portion Z constitute integratedly as rotating flow generation branching portion 115.

In addition, as shown in figure 14, the passage diameters φ d1 that the first passage diameters φ d2 ratio that flows out pipe arrangement 117 flows into pipe arrangement 116 is big, and then second flows out the passage diameters φ d3 of pipe arrangement 118 than the passage diameters φ d1 the earth formation that flows into pipe arrangement 116.Have, Figure 14 is the axial vertical sectional view that flows into pipe arrangement 116 again.In view of the above, make easily from flowing into the cold-producing medium rotation that pipe arrangement 116 flows into the first outflow pipe arrangement 117 and the second outflow pipe arrangement 118.

And then, flowing into pipe arrangement 116, the first outflow pipe arrangement 117 and second direction of principal axis that flows out pipe arrangement 118 is configured on the same horizontal plane, thereby the time with the flow branching of cold-producing medium, be not easy to be subjected to the influence of gravity, only adjust the pipe arrangement diameter phi d3 that the first pipe arrangement diameter phi d2 and second that flows out pipe arrangement 117 flows out pipe arrangement 118, just can divide orientation respectively to flow out the refrigerant amount that pipe arrangement 117,118 flows out rightly.

Engage the different refrigerant piping of diameter by joint methods such as soldering, welding, bondings, can form such rotating flow easily and produce branching portion 115.And then, also can a plurality of refrigerant passage be set and form by inside at the metal derby of cuboid or resin mass.

Then, rotating flow produces first of branching portion 115 and flows out pipe arrangement 117 as shown in figure 12, is connected with fixed restriction portion 19, and second flows out pipe arrangement 118 is connected with the 5a of fixed nozzle portion of injector 5.This injector 5 is the mechanisms of decompressor with the cold-producing medium decompression, and also is the cold-producing medium cycling mechanism that carries out the circulation of cold-producing medium by the sucking action that the cold-producing medium with high velocity jet flows.

And then injector 5 has: the area of passage of the cold-producing medium that will press from second centre of flowing out pipe arrangement 118 inflows be limited in very little, and the relief portion that makes the cold-producing medium puffing again is the 5a of fixed nozzle portion; Dispose communicatively with the refrigerant injection mouth of the 5a of fixed nozzle portion, the cold-producing medium of the cold-producing medium that the attraction side evaporimeter 8 (second evaporimeter) that attraction is described from behind flows out attracts a mouthful 5b.

The 5a of fixed nozzle portion is the fixing nozzle of refrigerant passage area.That is, not changing refrigerant passage area ground constitutes.Therefore, constitute decompressor by the inflow pipe arrangement 116, the second outflow pipe arrangement 118 and the 5a of fixed nozzle portion that constitute above-mentioned nozzle side rotating flow generator.

In addition, in the present embodiment,, adopt the Laval nozzle in the way of refrigerant passage, have the throat that the area of passage dwindles the most as the 5a of fixed nozzle portion.Certainly, as the 5a of fixed nozzle portion, also can adopt the front end nozzle that attenuates.

And then, injector 5 attracts the downstream of mouthful 5b to have the cold-producing medium stream of the high speed that the refrigerant injection mouth from the 5a of fixed nozzle portion is sprayed and attracts the 5c of mixing portion of the attraction refrigerant mixed that mouthful 5b attracts from cold-producing medium at the 5a of fixed nozzle portion and cold-producing medium, has the 5d of diffusion portion that constitutes boosting section in the downstream of the 5c of mixing portion.

The 5d of diffusion portion forms the shape of the area of passage that increases cold-producing medium gradually, realizes cold-producing medium stream is slowed down, and the effect that refrigerant pressure is risen, the speed energy that is about to cold-producing medium is transformed to the effect of pressure energy.In addition, the outlet side of the 5d of diffusion portion is connected with outflow side evaporimeter 7.

Outflow side evaporimeter 7 (first evaporimeter) is to carry out heat exchange between the cold-producing medium that will flow out from the 5d of diffusion portion of injector 5 and the air carried by not shown blowing fan, makes the low pressure refrigerant evaporation, the heat absorption heat exchanger of performance heat-absorbing action.And then the outlet side of outflow side evaporimeter 7 is connected with the entrance side of the low-pressure side refrigerant flow path 6b of described inner heat exchanger 6.

And then, at the outlet side connection accumulator 9 of low-pressure side refrigerant flow path 6b.This accumulator 9 is the gas-liquid separators that cold-producing medium are separated into vapor phase refrigerant and liquid phase refrigerant, and the vapor phase refrigerant outlet of accumulator 9 attracts side to be connected with the cold-producing medium of compressor 1.

Then, first flows out the entrance side that pipe arrangement 117 is connected fixed restriction portion 19, and the outlet side of fixed restriction portion 19 is connected and attracts on the side evaporimeter 8.Fixed restriction portion 19 is the relief portion that will reduce pressure to the cold-producing medium that attraction side evaporimeter 8 flows into, and has the flow adjustment function of the flow adjustment that flows into the cold-producing medium that attracts side evaporimeter 8.

In addition, in the present embodiment,, adopted capillary as fixed restriction portion 19.Therefore, flow out pipe arrangement 117 and fixed restriction portion 19, can constitute decompressor by the inflow pipe arrangement 116, first that constitutes the second above-mentioned rotating flow generator.

Attracting side evaporimeter 8 is to carry out heat exchange between cold-producing medium that flows out from fixed restriction portion 19 and blowing fan conveying air, makes the low pressure refrigerant evaporation, the heat absorption heat exchanger of performance heat-absorbing action.Here, outflow side evaporimeter 7 is configured in the upstream side (wind upside) of the flow direction of the air of being carried by blowing fan, attracts side evaporimeter 8 to be configured in the downstream (wind downside) of the flow direction of air.

And then in the present embodiment, outflow side evaporimeter 7 and attraction side evaporimeter 8 are assembled into Construction integration.Particularly, constituting outflow side evaporimeter 7 and the constituent part that attracts side evaporimeter 8 with aluminium, is Construction integration by soldered joint.

Therefore, the air of being carried by above-mentioned blowing fan flows in arrow Y direction, at first, and with 7 coolings of outflow side evaporimeter, then by attracting 8 coolings of side evaporimeter.That is, can cool off same cooling object space (for example car is indoor) with outflow side evaporimeter 7 and attraction side evaporimeter 8.

Below, according to Figure 15, the work of the present embodiment of above-mentioned structure is described.Figure 15 is the mollier diagram of state of roughly representing the cold-producing medium of refrigerating circulatory device.Have, in Figure 15, solid line is represented the state of cold-producing medium of the refrigerating circulatory device of present embodiment again, and dotted line is represented the state of the cold-producing medium of the comparative example device described later.

At first, in the present embodiment, if by vehicle motor drive compression machine 1, compressor 1 just sucks cold-producing medium, compresses and sprays.The state of cold-producing medium at this moment is a point of Figure 15.Flow into to radiator 2 from the vapor phase refrigerant of the high-temperature high-pressure state of compressor 1 ejection, carry out heat exchange and dispel the heat (a point of Figure 15 → b point) with the wind pushing air of carrying from cooling fan (outer gas).

The cold-producing medium that flows out from radiator 2 carries out gas-liquid separation (the b point of Figure 15 → c point) among accumulator 2a, the liquid phase refrigerant of separation flows into to the high-pressure side of inner heat exchanger 6 refrigerant flow path 6a.The suction cold-producing medium of the liquid phase refrigerant that flows into to high-pressure side refrigerant flow path 6a and compressor 1 by low-pressure side refrigerant flow path 6b carries out heat exchange and is cooled, and becomes supercooling state (the c point of Figure 15 → d point).

The cold-producing medium that flows out from high-pressure side refrigerant flow path 6a flows into to expansion valve 3a, reduces pressure to press into the centre, becomes gas-liquid two-phase state (the d point of Figure 15 → e point).The cold-producing medium of this gas-liquid two-phase state produces branching portion Z (the e point of Figure 15) branch of branching portion 115 at rotating flow, one side's of branch cold-producing medium flows out pipe arrangement 117 by first and flows into to fixed restriction portion 19, and the opposing party's cold-producing medium flows out pipe arrangement 118 by second and flows into to the 5a of fixed nozzle portion of injector 5.

To the cold-producing medium constant entropy ground puffing (the e point of Figure 15 → f point) that the 5a of fixed nozzle portion of injector 5 flows into.Then, the pressure energy of cold-producing medium is transformed to the speed energy when this puffing, and cold-producing medium becomes at a high speed and sprays from the refrigerant injection mouth of the 5a of fixed nozzle portion.By the cold-producing medium sucking action of this ejector refrigeration agent, attract by the cold-producing medium behind the attraction side evaporimeter 8 from refrigerant suction port 5b.

Then,, mix (the f point of Figure 15 → g point) by the 5c of mixing portion, flow into the diffusion 5d of portion from the ejector refrigeration agent of the 5a of fixed nozzle portion injection with from the attraction cold-producing medium that refrigerant suction port 5b attracts in the inside of injector 5.At the 5d of this diffusion portion, by the expansion of the area of passage, the speed energy of cold-producing medium is transformed to pressure energy, so the pressure of cold-producing medium rises (the g point of Figure 15 → h point).

The cold-producing medium that flows out from the 5d of diffusion portion of injector 5 flows into to outflow side evaporimeter 7, from the wind pushing air heat absorption and the evaporation (the h point of Figure 15 → i point) of blowing fan.And then the cold-producing medium that flows out from outflow side evaporimeter 7 flows into the low-pressure side refrigerant flow path 6b of inner heat exchanger 6, carries out heat exchange with high-pressure refrigerant by high-pressure side refrigerant flow path 6a and is heated (the i point of Figure 15 → j point).

The cold-producing medium that heats in the low-pressure side refrigerant flow path 6b of inner heat exchanger 6 is drawn into the compressor 1 from the vapor phase refrigerant outlet of accumulator 9, is compressed (the j point of Figure 15 → a point) once more.

On the other hand, flow out pipe arrangement 117 by first and reduced pressure by fixed restriction portion 19 to the cold-producing medium that fixed restriction portion 19 flows into, become low pressure refrigerant (the e point of Figure 15 → k point), this low pressure refrigerant flows into and attracts side evaporimeter 8.Absorb heat and evaporation (the k point of Figure 15 → l point) from carry out heat-exchanged air by outflow side evaporimeter 7 to the cold-producing medium that attracts side evaporimeter 8 to flow into.Be attracted in the injector 5 (the l point of Figure 15 → g point) from refrigerant suction port 5b by the vapor phase refrigerant behind the attraction side evaporimeter 8.

As mentioned above, in the present embodiment, the downstream cold-producing medium of the 5d of diffusion portion of injector 5 is supplied with to outflow side evaporimeter 7, and the downstream cold-producing medium of fixed restriction portion 19 is supplied with to attraction side evaporimeter 8, so can bring into play cooling effect simultaneously with outflow side evaporimeter 7 and attraction side evaporimeter 8.

In addition, the air of carrying from blowing fan passes through by the order of outflow side evaporimeter 7 → attraction side evaporimeter 8, can cool off same cooling object space.At this moment, sucking action by injector 5, can make and attract the cold-producing medium evaporating pressure (cold-producing medium evaporating temperature) of side evaporimeter 8 low with respect to the cold-producing medium evaporating pressure (cold-producing medium evaporating temperature) of outflow side evaporimeter 7, so can guarantee outflow side evaporimeter 7 and attract the cold-producing medium evaporating temperature of side evaporimeter 8 and the temperature difference of wind pushing air, can efficiently cool off wind pushing air.

In addition, evaporimeter 7 downstreams in outflow side are connected with compressor 1 suction side, so can make compressor 1 suck the cold-producing medium that the 5d of diffusion portion by injector 5 boosts.In view of the above, the suction pressure of compressor 1 is risen, so can reduce the driving power of compressor 1.

In addition,, can enlarge outflow side evaporimeter 7 and attract the enthalpy difference (refrigerating capacity) of the cold-producing medium between the entrance and exit of side evaporimeter 8,, can improve cycle efficieny (COP) so can increase the refrigerating capacity that circulates by the effect of inner heat exchanger 6.

And then, in the present embodiment, adopted rotating flow to produce branching portion 115, improve effect so can obtain high cycle efficieny.Improve effect about this cycle efficieny, improve effect with the cycle efficieny of comparative example device and relatively describe.

At first, the comparative example device is not have rotating flow to produce i.e. any the refrigerating circulatory device of the first rotating flow generator and the second rotating flow generator of branching portion 115, particularly, rotating flow is produced branching portion 115 change to joint between three members, the refrigerating circulatory device of other structures and present embodiment is same.

Therefore, if make the work of comparative example device, just same with present embodiment, cold-producing medium flows according to the order of compressor 1 → radiator 2 → accumulator 2a → inner heat exchanger 6 → expansion valve 3a, at the branching portion Z branch that is made of joint between three members (a point of Figure 15 → b point → c point → d point → e point).Then, the cold-producing medium that flows into to the 5a of fixed nozzle portion from branching portion Z shown in e point → f ' point of Figure 15, constant entropy ground puffing.

And then in the 5c of mixing portion of injector 5, mixing jetting cold-producing medium and attraction cold-producing medium (f ' point → g ' point of Figure 15) are in the 5d of diffusion portion rising (g ' point → h ' point of Figure 15).Then, according to the order of outflow side evaporimeter 7 → inner heat exchanger 6 → accumulator 9 → compressor 1 flow (h ' point → i ' point → j ' point → a point of Figure 15).

On the other hand, reduce pressure by fixed restriction portion 19 to the cold-producing medium that fixed restriction portion 19 flows into from branching portion Z, become low pressure refrigerant (e point → k ' point of Figure 15), according to the order that attracts side evaporimeter 8 → injector 5 (refrigerant suction port 5b) mobile (the k point of Figure 15 → l point → g ' point).

Here, if the puffing process (e point → f ' point of Figure 15) of the puffing process (the e point of Figure 15 → f point) of the cold-producing medium of the 5a of fixed nozzle portion of comparison present embodiment and the 5a of fixed nozzle portion of comparative example device, just as shown in figure 15, in the present embodiment, can make the more approaching insentrope of representing with double dot dash line of puffing process of the cold-producing medium of the 5a of fixed nozzle portion.

Its reason is because in the present embodiment, makes the stream rotation of cold-producing medium, and it is flowed into to the 5a of fixed nozzle portion, so with respect to the comparative example device, promote the boiling of liquid phase refrigerant, fully increase the flow velocity of cold-producing medium, can improve decompression efficient (nozzle efficiency) the η n of the 5a of fixed nozzle portion.

At this moment, relief portion is made of the 5a of fixed nozzle portion, so can be attached on the pin etc. to cold-producing medium that relief portion flows into.Therefore, the rotating flow composition of cold-producing medium can not weaken, and by the gas-liquid that centrifugal force separates cold-producing medium, can make the liquid phase refrigerant boiling higher than vapor phase refrigerant rotary speed efficiently.

The result, in the present embodiment, as shown in figure 15, with respect to the comparative example device, the specific enthalpy of the cold-producing medium behind the puffing only can be reduced the amount of Δ i1, so can enlarge the enthalpy difference (refrigerating capacity) of the cold-producing medium between the entrance and exit of outflow side evaporimeter 7 (first evaporimeter).

And then, fully increase from the flow velocity of the cold-producing medium stream of the 5a of fixed nozzle portion injection, can increase the cold-producing medium traffic attraction that attracts from refrigerant suction port 5b.In view of the above, recovering energy of injector 5 also can increase, so as shown in figure 15, the amount of boost Δ P of the cold-producing medium of the 5d of diffusion portion also increases with respect to the amount of boost Δ P ' of comparative example device.

As a result, in the present embodiment,, the suction pressure of compressor 1 is risen, so can reduce the driving power of compressor 1 with respect to the comparative example device.

And then, if the puffing process (e point → k ' point of Figure 15) of the puffing process (the e point of Figure 15 → k point) of the cold-producing medium of the fixed restriction portion 19 of comparison present embodiment and the fixed restriction portion 19 of comparative example device, just as shown in figure 15, in the present embodiment, can make the approaching insentrope of representing with double dot dash line of puffing process of the cold-producing medium of fixed restriction portion 19.

Its reason is because in the present embodiment, makes the stream rotation of cold-producing medium, and it is flowed into to fixed restriction portion 19, so with respect to the comparative example device, the flow velocity of cold-producing medium is fully increased, can make the cold-producing medium supersonic speedization of puffing process.

At this moment, relief portion is made of fixed restriction portion 19, so on the cold-producing medium that relief portion flows into can not be attached to pin etc.Therefore, the rotating flow composition of cold-producing medium can not weaken, and can reduce the pressure loss of the expansion that is accompanied by vapor phase refrigerant, can effectively increase the refrigerant velocities of puffing process.

As a result, in the present embodiment, as shown in figure 15,, the specific enthalpy of the cold-producing medium behind the puffing only can be reduced the amount of Δ i2, so can enlarge the enthalpy difference (refrigerating capacity) of the cold-producing medium between the entrance and exit that attracts side evaporimeter 8 with respect to the comparative example device.

As mentioned above, in the present embodiment, produce branching portion 115, make the stream rotation of the cold-producing medium of the 5a of fixed nozzle portion that flows into injector 5 and fixed restriction portion 19, improve decompression efficiency eta n, can efficiently improve cycle efficieny by adopting rotating flow.

(the 6th embodiment)

In the present embodiment, illustrate that the rotating flow with respect to the 5th embodiment produces branching portion 115, adopt rotating flow shown in Figure 16 to produce the refrigerating circulatory device of branching portion 125.Other structures and the 5th embodiment are same.

Figure 16 is the stereogram of the summary of rotating flow generation branching portion 125, and rotating flow produces branching portion 125 and has the inflow pipe arrangement 125a (inflow path) that cold-producing medium is flowed into, the rotating cylinder 125b of portion cylindraceous, the first second outflow pipe arrangement 125d (second outflow pathway) that flows out pipe arrangement 125c (first outflow pathway), cold-producing medium is gone out to the 5a of fixed nozzle portion of injector 5 effluent from the 125b of rotating cylinder portion that cold-producing medium is gone out to fixed restriction portion 19 effluents from the 125b of rotating cylinder portion that cold-producing medium is rotated in inside.

Flow into the central portion that pipe arrangement 125a is connected the 125b of rotating cylinder portion, and then, along the periphery tangential direction connection of the 125b of rotating cylinder portion.That is, flowing into pipe arrangement 125a makes cold-producing medium flow into along the Zhou Fangxiang of the 125b of rotating cylinder portion.

Each flows out pipe arrangement 125c, 125d and is connected with the direction of principal axis end of the 125b of rotating cylinder portion respectively, and then, each direction of principal axis that flows out the direction of principal axis of pipe arrangement 125c, 125d and the 125b of rotating cylinder portion be configured in coaxial on.That is, each flows out pipe arrangement 125c, 125d cold-producing medium is flowed out at the direction of principal axis of the 125b of rotating cylinder portion.

Therefore, from flowing into the inwall rotation of cold-producing medium that pipe arrangement 125a flows into to the 125b of rotating cylinder portion, shown in thick-line arrow B, the C of Figure 16, under the state of rotation, flow out pipe arrangement 125c, 125d and flow out from each along the 125b of rotating cylinder portion.

That is, in the present embodiment, form branching portion Z in the inside of the 125b of rotating cylinder portion, the 125b of rotating cylinder portion has the function of the second rotating flow generator and the first rotating flow generator concurrently.In view of the above, can make the stream rotation of the cold-producing medium of the 5a of fixed nozzle portion that flows into injector 5 and fixed restriction portion 19, improve effect so can obtain with the same cycle efficieny of the 5th embodiment.

And then, by adjusting the pipe arrangement diameter phi d3 that the first pipe arrangement diameter phi d2 and second that flows out pipe arrangement 125c flows out pipe arrangement 125d, can divide orientation respectively to flow out the refrigerant amount that pipe arrangement 125c, 125d flow out equally rightly with the 5th embodiment.

(the 7th embodiment)

In the present embodiment, illustrate that the rotating flow with respect to the 5th embodiment produces branching portion 115, adopt rotating flow shown in Figure 17 to produce the refrigerating circulatory device of branching portion 126.Other structures and the 5th embodiment are same.

Figure 17 is the stereogram that rotating flow produces the summary of branching portion 126, rotating flow produce branching portion 126 and have inflow pipe arrangement 126a (inflow path) that cold-producing medium is flowed into, make cold-producing medium at the 126b of rotating cylinder portion of the roughly tubular of inside rotation, make cold-producing medium first flow out pipe arrangement 126c (first outflow pathway), make cold-producing medium second flow out pipe arrangement 126d (second outflow pathway) to what the 5a of fixed nozzle portion of injector 5 effluent went out to what fixed restriction portion 19 effluents went out from the 126b of rotating cylinder portion from the 126b of rotating cylinder portion.

The 126b of rotating cylinder portion is configured to direction of principal axis towards vertical direction, flows into the end that pipe arrangement 126a is connected the side of the 126b of rotating cylinder portion, and the periphery tangential direction along the 126b of rotating cylinder portion connects again.That is, flowing into pipe arrangement 126a makes cold-producing medium flow into to the Zhou Fangxiang of the 126b of rotating cylinder portion.

Each flows out pipe arrangement 126c, 126d and is connected to the end that is connected a side opposition side that flows into pipe arrangement 126a in the end with the 126b of rotating cylinder portion.And then each direction of principal axis that flows out the direction of principal axis of pipe arrangement 126c, 126d and flow into pipe arrangement 126a is towards different directions.That is, each flow out pipe arrangement 126c, 126d with from the different direction of the inflow direction that flows into the cold-producing medium that pipe arrangement 126a flows into to the 126b of rotating cylinder portion cold-producing medium is flowed out.

Therefore, from flowing into the inwall rotation of cold-producing medium that pipe arrangement 126a flows into to the 126b of rotating cylinder portion, shown in thick-line arrow B, the C of Figure 17, under the state of rotation, flow out pipe arrangement 126c, 126d and flow out from each along the 126b of rotating cylinder portion.

That is, in the present embodiment, form branching portion Z in the inside of the 126b of rotating cylinder portion, the 126b of rotating cylinder portion has the function of the second rotating flow generator and the first rotating flow generator concurrently.In view of the above, can make the stream rotation of the cold-producing medium of the 5a of fixed nozzle portion that flows into injector 5 and fixed restriction portion 19, so can obtain the effect same with the 6th embodiment.

(the 8th embodiment)

In the 5th～the 7th above-mentioned embodiment, the example that adopts the rotating flow that constitutes the first rotating flow generator, the second rotating flow generator and branching portion Z integratedly to produce branching portion 115,125,126 has been described, but in the present embodiment, the example that constitutes the first rotating flow generator, the second rotating flow generator and branching portion Z respectively is described.

Particularly, in the refrigerating circulatory device of the 5th embodiment, abrogate rotating flow and produce branching portion 115, connect joint between three members with a cold-producing medium inflow entrance and 2 cold-producing medium flow exports in the downstream of expansion valve 3a.

And then, a side's of joint between three members cold-producing medium flow export is connected with the 5a of fixed nozzle portion of injector 5, the opposing party's cold-producing medium flow export is connected with fixed restriction portion 119.And, at the rotating flow generator 127 that the stream rotation that makes the cold-producing medium that flows into to relief portion is set respectively between joint between three members and the 5a of fixed nozzle portion and between joint between three members and the fixed restriction portion 119.

Therefore, constitute branching portion Z, constitute the first rotating flow generator and the second rotating flow generator by rotating flow generator 127 by joint between three members.That is, by rotating flow generator 127 and the 5a of fixed nozzle portion and rotating flow generator 127 and fixed restriction portion 19 formation decompressors.Other overall structures and the 5th embodiment are same.

This rotating flow generator 127 shown in the approximate three-dimensional map of Figure 18, the outflow pipe arrangement 127c (outflow pathway) that has inflow pipe arrangement 127a (inflow path) that cold-producing medium is flowed into, cold-producing medium is gone out to the 5a of fixed nozzle portion side or fixed restriction portion 19 effluents from the 127b of rotating cylinder portion at the 127b of rotating cylinder portion of the roughly tubular of inside rotation, with cold-producing medium.

Flow into the end that pipe arrangement 127a is connected the side of the 127b of rotating cylinder portion, and then, along the periphery tangential direction connection of the 127b of rotating cylinder portion.That is, flowing into pipe arrangement 127a makes cold-producing medium flow into to the Zhou Fangxiang of the 127b of rotating cylinder portion.

Flow out pipe arrangement 127c and be connected the end that is connected the side opposition side of inflow pipe arrangement 127a in the end with the 127b of rotating cylinder portion.And then the direction of principal axis of the direction of principal axis of outflow pipe arrangement 127c and inflow pipe arrangement 127a is towards different directions.That is, flow out pipe arrangement 127c with from the different direction of the inflow direction that flows into the cold-producing medium that pipe arrangement 127a flows into to the 127b of rotating cylinder portion cold-producing medium is flowed out.

Therefore, from flowing into the inwall rotation of cold-producing medium that pipe arrangement 127a flows into to the 127b of rotating cylinder portion, shown in the thick-line arrow D of Figure 18, under the state of rotation, flow out from flowing out pipe arrangement 127c along the 127b of rotating cylinder portion.In view of the above, can make the stream rotation of the cold-producing medium of the 5a of fixed nozzle portion that flows into injector 5 and fixed restriction portion 19, so can obtain the effect same with the 5th embodiment.

(the 9th embodiment)

In the present embodiment, the rotating flow generator 127 with respect to the 8th embodiment is described, adopts the refrigerating circulatory device of rotating flow generator 128 shown in Figure 19.Other structures and the 8th embodiment are same.

Figure 19 is the approximate three-dimensional map of rotating flow generator 128, and rotating flow generator 128 has the refrigerant piping 128a (refrigerant passage) that makes the cold-producing medium inflow and outflow, forms spiral helicine groove 128b at the internal face of this refrigerant piping 128a.Particularly, by reversing the refrigerant piping 128a of tubulose, form spiral helicine groove 128b.Certainly, also can be by this spiral helicine grooves of formation such as tapping processing.

In rotating flow generator 128, flow into inner cold-producing medium along the spiral helicine groove 128b that forms at internal face, shown in thick-line arrow D, rotate, can make the stream rotation of the cold-producing medium of the 5a of fixed nozzle portion that flows into injector 5 and fixed restriction portion 19.As a result, can obtain the effect same with the 8th embodiment.

(other embodiments)

The present invention is not limited to above-mentioned embodiment, can carry out various distortion as described below.

(1) in the 5th～the 9th above-mentioned embodiment, adopted capillary, but also can adopt throttle orifice, Laval nozzle, nozzle that front end is thin etc. as fixed restriction portion 19.Here, Figure 20 represents as fixed restriction portion 19, and the decompression efficiency eta n (nozzle efficiency) when adopting described throttle mechanism improves effect.As shown in figure 20, adopt throttle mechanism arbitrarily,, can both improve decompression efficiency eta n by the rotating flow generator is set.

(2) refrigerating circulatory device of the 5th～the 9th above-mentioned embodiment is made of the spray type refrigerating EGR, thus spray nozzle part 5a and fixed restriction portion 19 these two have relief portion.And then, realized the structure of decompressor by both sides' relief portion (5a, 19), but also can realize the structure of decompressor by the relief portion (5a, 19) of any one party.

As mentioned above, the relief portion (5a, 19) by any one party realizes the structure of decompressor, can both improve cycle efficieny.And then, at this moment, dispose the rotating flow generator 127,128 that illustrates in the 8th, the 9th embodiment in the upstream of the relief portion (5a, 19) of any one party and get final product.

(3) in the 5th～the 9th above-mentioned embodiment, as refrigerating circulatory device, adopt the spray type refrigerating EGR, but in the common steam compression type refrigeration EGR that constitutes by compressor, radiator, pressure reducer, evaporimeter, used the present invention, also can improve cycle efficieny.And then, at this moment, dispose the rotating flow generator 127,128 that illustrates in the 8th, the 9th embodiment in the upstream of pressure reducer and get final product.

(4) in the 9th above-mentioned embodiment, internal face at refrigerant piping 128a forms spiral helicine groove 128b, formed rotating flow generator 128, but also can play with the spiral helicine cowling panel of the same function of groove 128b in refrigerant piping 128a inner gateway configuration etc.

(5) in the 5th～the 9th above-mentioned embodiment, the refrigerating circulatory device that has adopted expansion valve 3a and accumulator 9 is described, but, also can adopt the temperature-type expansion valve that the degree of superheat of the cold-producing medium in outflow side evaporimeter 7 (first evaporimeter) downstream is adjusted into setting as expansion valve 3a.At this moment, also can abrogate accumulator 9.

(6) in the above-described embodiment, engaging by soldered joint outflow side evaporimeter 7 (first evaporimeter) and attraction side evaporimeter 8 (second evaporimeters) is Construction integration, but also can be with additive method that outflow side evaporimeter 7 (first evaporimeter) and attraction side evaporimeter 8 (second evaporimeters) is integrated.For example, with publicization of wing of the outflow side evaporimeter 7 (first evaporimeter) and the attraction side evaporimeter 8 (second evaporimeters) of finned tube structure, use the tubular construction that contacts with wing to cut apart.

(7) in the 5th above-mentioned embodiment, first of rotating flow generation branching portion 115 flows out the direction of principal axis of the pipe arrangement 117 and the second outflow pipe arrangement 118 towards the axial direction perpendicular to inflow pipe arrangement 116, but also can be towards other directions.For example, first flows out the symmetry direction of the direction of principal axis of the pipe arrangement 117 and the second outflow pipe arrangement 118 towards the expansion shape.

(8) in the above-described embodiment, by outflow side evaporimeter 7 (first evaporimeter) and attraction side evaporimeter 8 (second evaporimeters) same air-conditioning object space is cooled off, but also can pass through outflow side evaporimeter 7 (first evaporimeter) and attract side evaporimeter 8 (second evaporimeters) different air-conditioning object space coolings.For example, in the refrigeration storehouse, use the attraction side evaporimeter 8 (second evaporimeter) low in the cooling, in the indoor cooling of car, use first evaporimeter 7 with respect to outflow side evaporimeter 7 (first evaporimeter) cold-producing medium evaporating pressure (cold-producing medium evaporating temperature).

(9) in the 5th～the 9th above-mentioned embodiment, the example that adopts freon class cold-producing medium as cold-producing medium has been described, but also can have adopted HC class cold-producing medium and carbon dioxide.Utilize carbon dioxide as cold-producing medium, when constituting the high-pressure side refrigerant pressure and surpassing the supercritical refrigeration cycle device of critical pressure of cold-producing medium, cold-producing medium can condensation in radiator 2, so can abrogate accumulator 2a.And then, at this moment, the cold-producing medium gas-liquid two-phase state that reduces pressure is got final product with expansion valve 3a.

(10) in the above-described embodiment, radiator 2 is as the outdoor heat exchanger with cold-producing medium and outer gas heat exchange, outflow side evaporimeter 7 (first evaporimeter) and attraction side evaporimeter 8 (second evaporimeters) are applied in the indoor cooling of car as indoor side heat exchanger, but also can be opposite, at outflow side evaporimeter 7 (first evaporimeter) with attract side evaporimeter 8 (second evaporimeters), use the present invention in the heat pump cycle that radiator 2 constitutes as the indoor side heat exchanger that air or water etc. is heated the fluid heating as constituting from the outdoor heat exchanger of the thermal source heat absorption of outer gas etc.In addition, its position is set can be the such moving body of vehicle, the fixed body that is placed on the fixed position.

In addition, in the above-described embodiment, though do not determine the kind of cold-producing medium especially, can in the overcritical circulation of steam compression types such as freon class cold-producing medium, HC class cold-producing medium and carbon dioxide coolant and in the subcritical cycle any one, be applied.

(11) in addition, the injector of first～the 4th above-mentioned embodiment can be can be with the variable capacity type of the refrigerant flow path variable area of nozzle.

In addition, the flow distributor of first～the 4th above-mentioned embodiment also can be made of the branch's pipe arrangement of putting down in writing in the described embodiment with a plurality of streams except profile is that the inside of the piece of cube or cuboid has the form of stream.

Claims (18)

1. a refrigerating circulatory device is characterized in that, comprising:

Suck the compressor (1) of cold-producing medium and boil down to high-pressure refrigerant;

Make from the radiator (2) of the heat heat radiation of the described high-pressure refrigerant of described compressor (1) ejection;

First throttle mechanism (3) with the decompression of the cold-producing medium in described radiator (2) downstream;

Have to be the flow distributor (10,20,30,40,115,125,126) of the stream of a plurality of streams by the cold-producing medium flow distribution of described first throttle mechanism (3) decompression;

Be taken into a side's who distributes by described flow distributor cold-producing medium, spray and formation cold-producing medium stream at a high speed, and attract the opposing party's injection of refrigerant device (5) by the cold-producing medium stream of described high speed from attraction portion (5b) from spray nozzle part (5a); With

Be taken into the described the opposing party's who distributes by described flow distributor cold-producing medium and make its evaporation, the evaporimeter (8) that flows out to described attraction portion (5b),

Described flow distributor have with the cold-producing medium that flows into measure in accordance with regulations distribution distribution stream mechanism (12,13,14,22,23,24,32,33,34,42,43,44,116,117,118,125a～125d, 126a～126d).

2. refrigerating circulatory device according to claim 1 is characterized in that:

Described distribution stream mechanism has: the first-class path (12,22,32,42,116) that is flowed into by the cold-producing medium of described first throttle mechanism (3,3a) decompression; From described first-class forehearth limb and go out second circulation flow path (13,23,33,43,117) of cold-producing medium to described evaporimeter (8) effluent; Go out the 3rd circulation flow path (14,24,34,44,118) of cold-producing medium from described first-class forehearth limb and to described injector (5) effluent,

Described first-class path, described second circulation flow path and described the 3rd circulation flow path are configured on the roughly same horizontal plane, the stream diameter of described second circulation flow path (φ d2) is bigger than the stream diameter (φ d1) of described first-class path, and also the stream diameter (φ d3) than described the 3rd circulation flow path is big.

3. refrigerating circulatory device according to claim 1 is characterized in that:

Described flow distributor has the rotating flow formation portion (13,23,25,33,35,43,45,28,117,118) of stream rotation of the cold-producing medium of the distribution of making.

4. refrigerating circulatory device according to claim 3 is characterized in that:

Described rotating flow formation portion has the big stream (13,23,25,33,35,43,45,117) of stream diameter than the stream of upstream side.

5. refrigerating circulatory device according to claim 3 is characterized in that:

Described rotating flow formation portion (25,35,45,28,118) makes the cold-producing medium rotation to described spray nozzle part (5a) inflow of described injector (5).

6. according to any described refrigerating circulatory device in the claim 1～5, it is characterized in that:

Described distribution stream mechanism has the different stream (34,35,44,45) of height and position of comparing gravity direction with other streams.

7. according to any described refrigerating circulatory device in the claim 1～5, it is characterized in that:

Have second throttle mechanism (4,19), this second throttle mechanism (4,19) is being supplied with the described the opposing party's who is distributed by described flow distributor cold-producing medium before with its puffing to described evaporimeter (8).

8. decompressor, it is applied in the refrigerating circulatory device, it is characterized in that, comprising:

With the relief portion of cold-producing medium puffing (19,5a); With

Be configured in the upstream side of described relief portion (19,5a), make the rotating flow generating unit (115,125,126,127,128) of the stream rotation of the cold-producing medium that flows into to described relief portion (19,5a),

Described relief portion (19,5a) is made of fixed restriction portion.

9. decompressor according to claim 8 is characterized in that:

Described rotating flow generating unit (115,125,126,127) has: make the inflow path that cold-producing medium flows into (116,125a, 126a, 127a); Make the outflow pathway that cold-producing medium flows out along the direction different with the inflow direction of the cold-producing medium that flows into from described inflow path (116,125a, 126a, 127a) (117,118,125c, 125d, 126c, 126d, 127c).

10. decompressor according to claim 9 is characterized in that:

Described rotating flow generating unit (125,127) has the cylindraceous rotating cylinder portion (125b, 127b) of cold-producing medium in the inside rotation that make,

Described inflow path (125a, 127a) makes cold-producing medium flow into along the Zhou Fangxiang of described rotating cylinder portion (125b, 127b),

Described outflow pathway (125c, 125d, 127c) makes cold-producing medium flow out along the direction of principal axis of described rotating cylinder portion (125b, 127b).

11. decompressor according to claim 8 is characterized in that:

Described rotating flow generating unit (128) has the refrigerant passage (128a) that makes the cold-producing medium inflow and outflow,

Internal face in described refrigerant passage (128a) is formed with spiral helicine groove (128b).

12. a refrigerating circulatory device is characterized in that:

Has any described decompressor in the claim 8～11.

13. a refrigerating circulatory device is characterized in that, comprising:

Compressor (1) with cold-producing medium compression and ejection;

The radiator (2) that will dispel the heat from the high-temperature high-pressure refrigerant of described compressor (1) ejection;

Branching portion (Z) with the flow branching of described radiator (2) outlet side cold-producing medium;

Injector (5), it has and will be attracted the cold-producing medium of cold-producing medium to attract mouthful (5b) by the fixed nozzle portion (5a) of a side's of described branching portion (Z) branch cold-producing medium puffing, cold-producing medium stream by the high speed of spraying from fixed nozzle portion (5a), mix the cold-producing medium stream of the high speed of spraying from described fixed nozzle portion (5a) and attract the attraction cold-producing medium of mouthful (5b) and the diffusion portion (5c) that it is boosted from described cold-producing medium;

Will be by the fixed restriction portion (19) of the opposing party's of described branching portion (Z) branch cold-producing medium puffing; With

Make described fixed restriction portion (19) downstream cold-producing medium evaporation, attract mouthful attraction side evaporimeter (8) of (5b) upstream side outflow to described cold-producing medium,

Also have: be configured in described branching portion (Z) downstream and described fixed nozzle portion's (5a) upstream side and make the first rotating flow generator (116 of the stream rotation of the cold-producing medium that flows into to described fixed nozzle portion (5a), 118,125b, 126b, 127b, 128), with be configured in described branching portion (Z) downstream and described fixed restriction portion's (19) upstream side and make the second rotating flow generator (116 of the stream rotation of the cold-producing medium that flows into to described fixed restriction portion (19), 117,125b, 126b, 127b, 128) at least one side in.

14. refrigerating circulatory device according to claim 13 is characterized in that:

Has the outflow side evaporimeter (7) that makes from the cold-producing medium evaporation of described injector (5) outflow.

15., it is characterized in that according to claim 13 or 14 described refrigerating circulatory devices:

Have described first rotating flow generator (116,118,125b, 126b, 127b, 128) and the described second rotating flow generator (116,117,125b, 126b, 127b, 128) both sides.

16. refrigerating circulatory device according to claim 15 is characterized in that:

The described first rotating flow generator (116,118,125b, 126b), the described second rotating flow generator (116,117,125b, 126b) and described branching portion (Z) produce branching portion (115,125,126) one as rotating flow and constitute.

17. refrigerating circulatory device according to claim 16 is characterized in that:

Described rotating flow produces branching portion (115,125,126) to have: make the inflow path that cold-producing medium flows into (116,125a, 126a), from described inflow path (116,125a, 126a) branch and make first outflow pathway that cold-producing medium flows out (117,125c, 126c), from described inflow path (116,125a, 126a) branch and make second outflow pathway that cold-producing medium flows out (118,125d, 126d)

Described first outflow pathway (117,125c, 126c) and described second outflow pathway (118,125d, 126d) make cold-producing medium flow out along the direction different with the inflow direction of the cold-producing medium that flows into to described inflow path (116,125a, 126a).

18. refrigerating circulatory device according to claim 17 is characterized in that:

The direction of principal axis of described inflow path (116), described first outflow pathway (117) and described second outflow pathway (118) is configured on the same horizontal plane,

The passage diameters (φ d3) of passage diameters of described first outflow pathway (117) (φ d2) and described second outflow pathway (118) forms bigger than the passage diameters (φ d1) of described inflow path (116).

Images