CN202511537U - Liquid distributing device and air conditioner with same - Google Patents

Abstract

The utility model provides a liquid distributing device and an air conditioner with the same. The liquid distributing device comprises a heat exchange unit, a first liquid collecting pipe, a liquid distributing pipe and perforated baffle plates, wherein the two end surfaces of the first liquid collecting pipe are closed, a plurality of pipe wall outlets are arranged on the pipe wall of the first liquid collecting pipe along the length direction, and the plurality of pipe wall outlets are communicated with the heat exchange unit; the liquid distributing pipe is arranged in the first liquid collecting pipe, one end of the liquid distributing pipe extends out of the end surface of the first liquid collecting pipe, a liquid outlet is arranged on the pipe wall of the liquid distributing pipe, and the liquid outlet is communicated with the inside of the first liquid collecting pipe; and the perforated baffle plates are positioned in the first liquid collecting pipe and arranged at intervals along the axial direction between the pipe wall where the outlet of the first liquid collecting pipe is located and the liquid distributing pipe. According to the technical scheme disclosed by the utility model, the perforated baffle plate is installed in the liquid distributing pipe, so that a large quantity of accumulated gas-liquid two-phase cooling medium can be microminiaturized, a better liquid distributing effect can be realized on the gas-liquid two-phase cooling medium flowing out of the liquid distributing pipe and the liquid distribution of the gas-liquid two-phase cooling medium entering the liquid collecting pipe can be more uniform.

Description

Liquid distributing device and comprise the air-conditioner of this liquid distributing device

Technical field

The utility model relates to the air-conditioner technical field, in particular to a kind of liquid distributing device and comprise the air-conditioner of this liquid distributing device.

Background technology

Heat exchanger main flow on the air-condition heat exchanger still is the copper tube with fins heat exchanger at present, and the copper tube with fins heat exchanger exists cost height, poor, the separating tube/problems such as collector tube assembly welding complicacy of anti-galvano-cautery power.

Advantages such as micro-channel heat exchanger adopts flat tube augmentation of heat transfer technology, is the flat pipe heat exchanger that a kind of full aluminium is made, and it is low to have a cost, and anti-galvano-cautery power is strong, and separating tube/collector tube modular construction is simple.And micro-channel heat exchanger is existing the application on single cooler, on air conditioning for automobiles, also uses for many years.Use micro-channel heat exchanger not only can simplify technology, reduce the refrigerant injection rate, and stream to compare to copper tube with fins simpler, be convenient to optimize.

Owing in refrigerated air-conditioning system, the cold-producing medium that gets into heat exchanger is a gas-fluid two-phase mixture, is divided into usually in the multichannel entering heat exchanger absorbing heat, and liquid phase is evaporated to gas to realize the refrigeration purpose.Can cold-producing medium two-phase fluid, particularly wherein liquid be assigned to uniformly and carry out heat exchange in each paths, are the keys of design of heat exchanger.From the result of match test, during the micro-channel heat exchanger ubiquity high frequency refrigerating operaton of present domestic each big producer, the problem that the micro-channel tubes separatory is uneven; Although the complete machine performance reaches the expection requirement; But under the service condition of actual complex,, can cause different tube refrigerant mass flow discrepancies even if each micro-channel tubes separatory is uneven in the heat exchanger; The less evaporation very soon of flow in the pipe, the pipeline outlet degree of superheat is higher; The too much evaporation of flow does not finish in the pipe, and it is little to cause exporting the degree of superheat, even contains liquid.It is objective fact that micro-channel tubes heat exchange area under two kinds of situation can not be fully utilized, and should make great efforts to avoid.

The utility model content

The utility model aims to provide a kind of liquid distributing device and comprises the air-conditioner of this liquid distributing device, and the gas-liquid two-phase refrigerant that flows out separating tube can be evenly distributed in each micro-channel tubes, thereby improves the utilization rate of micro-channel heat exchanger heat exchange area.

To achieve these goals, an aspect according to the utility model provides a kind of liquid distributing device, comprising: heat exchange unit; First collector tube, the both ends of the surface sealing, and be provided with a plurality of tube wall outlets on the tube wall of first collector tube along its length, a plurality of tube wall outlets are communicated with heat exchange unit; Separating tube is arranged in first collector tube, and an end of separating tube stretches out from the end face of first collector tube, and the tube wall of separating tube is provided with liquid outlet, the liquid outlet and the first collector tube internal communication; And perforated baffle, it is inner to be positioned at first collector tube, and in axial direction is arranged at interval between the tube wall outlet place tube wall and separating tube of first collector tube.

Further, the position of opening of perforated baffle is corresponding with the position of a plurality of tube wall outlets of first collector tube.

Further, the cross section of perforated baffle is an arc, and the concave surface of arc is towards the direction at separating tube place.

Further, the cross section of perforated baffle is an arc, and the convex surface of arc is towards the direction at separating tube place.

Further, the perforated baffle welding perhaps is connected on the inwall of first collector tube.

Further, heat exchange unit comprises a plurality of micro-channel tubes that are parallel to each other, and each micro-channel tubes exports corresponding one by one connection with a plurality of tube walls of first collector tube respectively.

Further, the end shape of micro-channel tubes is corresponding with the outside wall surface of first collector tube.

Further, separating tube is arranged in first collector tube along the direction off-centre away from perforated baffle.

According to the utility model on the other hand, a kind of air-conditioner is provided, has comprised aforementioned each liquid distributing device.

Use the technical scheme of the utility model; Through in collector tube, installing perforated baffle additional; Can make the gas-liquid two-phase refrigerant microminiaturization of a large amount of gatherings, play, make the gas-liquid two-phase refrigerant more even distribution that gets in the micro-channel tubes flowing out the better distributional effects of gas-liquid two-phase refrigerant in the separating tube.

Description of drawings

The Figure of description that constitutes the application's a part is used to provide the further understanding to the utility model, and illustrative examples of the utility model and explanation thereof are used to explain the utility model, do not constitute the improper qualification to the utility model.In the accompanying drawings:

Fig. 1 shows the structural representation according to the micro-channel heat exchanger of the embodiment of the utility model;

Fig. 2 shows the micro-channel heat exchanger micro-channel tubes end construction sketch map according to the embodiment of the utility model;

Fig. 3 shows according to the micro-channel tubes end of the micro-channel heat exchanger of the embodiment of the utility model and the corresponding sketch map of the first collector tube tube wall;

Fig. 4 shows the sketch map that cyclone is installed in the separating tube according to the micro-channel heat exchanger of the embodiment of the utility model;

Fig. 5 shows the local enlarged diagram in A place that cyclone is installed in the separating tube according to the micro-channel heat exchanger of Fig. 4;

Fig. 6 shows the sketch map that another kind of cyclone is installed in the separating tube according to the micro-channel heat exchanger of the embodiment of the utility model;

Fig. 7 shows the sketch map that is provided with the strip liquid outlet according to the separating tube of the micro-channel heat exchanger of the embodiment of the utility model;

Fig. 8 shows the sketch map that the separating tube that is provided with liquid outlet is installed in first collector tube according to the micro-channel heat exchanger of the embodiment of the utility model;

Fig. 9 shows the sketch map that is provided with another kind of strip liquid outlet according to the separating tube of the micro-channel heat exchanger of the embodiment of the utility model;

Figure 10 shows the strip liquid outlet opening angle sketch map according to the micro-channel heat exchanger of the embodiment of the utility model;

Figure 11 shows the perforated baffle sketch map according to the micro-channel heat exchanger of the embodiment of the utility model;

Figure 12 shows according to the sketch map that perforated baffle is installed in the separating tube of the micro-channel heat exchanger of the embodiment of the utility model;

Figure 13 shows according to the sketch map that another kind of perforated baffle is installed in the separating tube of the micro-channel heat exchanger of the embodiment of the utility model;

Figure 14 shows according to the gas-liquid separator of the micro-channel heat exchanger of the embodiment of the utility model and gas-liquid mixing chamber sketch map; And

Figure 15 shows the sketch map that gas-liquid separator and gas-liquid mixing chamber are installed according to the micro-channel heat exchanger of the embodiment of the utility model.

The specific embodiment

Below with reference to accompanying drawing and combine embodiment to specify the utility model.Need to prove that under the situation of not conflicting, embodiment and the characteristic among the embodiment among the application can make up each other.

As shown in Figure 1, according to the embodiment of the utility model, micro-channel heat exchanger comprises first collector tube 10, second collector tube 20, heat exchange unit 80, separating tube 30.Wherein first collector tube 10 and second collector tube 20 laterally arrange, and between first collector tube 10 and second collector tube 20, are provided with heat exchange unit 80, and first collector tube 10 and second collector tube 20 are connected.

The both ends of the surface sealing of first collector tube 10, and in axial direction be provided with a plurality of tube wall outlets that are communicated with heat exchange unit 80 on the tube wall of first collector tube 10.The both ends of the surface sealing of second collector tube 20, and in axial direction be provided with a plurality of tube wall inlets that are communicated with heat exchange unit 80 on the tube wall of second collector tube 20.The gas-liquid two-phase refrigerant gets into from first collector tube 10, carries out heat exchange through heat exchange unit 80, is circulated to second collector tube 20 then, and will accomplish the gaseous coolant that forms after the heat exchange and discharge second collector tube 20.

In conjunction with referring to Fig. 2～3; Heat exchange unit 80 comprises a plurality of being parallel to each other and aluminum micro-channel tubes 81 independently; Each micro-channel tubes 81 all is the hollow tube of both ends open, and enters the mouth corresponding one by one connections respectively with a plurality of tube wall outlets of first collector tube 10 and with a plurality of tube walls of second collector tube 20.Be arranged with a plurality of space bars that extend along micro-channel tubes 81 length directions in the micro-channel tubes 81 of hollow in parallel, micro-channel tubes 81 inside are divided into a plurality of separate hot switching paths.For the end edge that guarantees micro-channel tubes 81 and first collector tube 10 and 20 welding of second collector tube firm; Need micro-channel tubes 81 be stretched into first collector tube 10 and second collector tube, 20 inside; So in order to realize separatory better, the both ends shape of micro-channel tubes 81 adapts with the outside wall surface of first collector tube 10 and second collector tube 20 respectively; Perhaps two of micro-channel tubes 81 end shapes are the concave inward structure that matches with the outside wall surface of first collector tube 10 and second collector tube 20 respectively; Like spill, V-arrangement or crescent; The concave inward structure otch can be saved the installing space of micro-channel tubes 81 in first collector tube 10; The installation of other parts in convenient first collector tube 10, simultaneously, the concave inward structure otch also is convenient to processing.Between adjacent two micro-channel tubes 81, fin is installed also, so that increase the heat exchange effect and the heat exchange efficiency of heat exchange unit 80.Fin shape can be a ripple type V-arrangement fin.

Use the heat exchanger of micro-channel tubes that various appellations are arranged, that is, be called the aluminothermy heat exchanger, be called the flat tube needle recuperator, be called PFC PARALLEL FLOW heat exchanger according to the refrigerant mobility status according to its shape of pipe according to its material.

In conjunction with referring to Fig. 4～6, separating tube 30 is arranged in first collector tube 10 along the direction off-centre away from the tube wall outlet of first collector tube 10, and the tube wall export center of the axle center of separating tube 30 and first collector tube 10 is positioned at the same radial direction of first collector tube 10.Can increase the tube wall outlet of first collector tube 10 and the distance between the separating tube 30 like this; Make the gas-liquid two-phase refrigerant that flows out from separating tube 30 the bigger flowing space arranged in first collector tube, 10 inside; The distribution of refrigerant in this space disperseed more, and realize better separatory.

First end of separating tube 30 is arranged on first collector tube, 10 inside, and extends to the first end end of first collector tube 10.Second end of separating tube 30 stretches out from second end of first collector tube 10, after bending, extends to the direction near second collector tube 20.

Also be provided with cyclone 40 in the separating tube 30.First end of cyclone 40 extends to the first end end of separating tube 30, and second end of cyclone 40 stretches out second end of first collector tube 10, but is no more than the kink of separating tube 30 second ends.Cyclone 40 can be in separating tube 30 inner rotation; The gas-liquid two-phase refrigerant that gets into separating tube 30 second ends is guided to first end of separating tube 30; And the gas-liquid two-phase refrigerant all is dispensed in the micro-channel tubes 81 from separating tube 30 inner flat, and increase the turbulent flow and the circulation of gas-liquid two-phase refrigerant fluid, make separating tube 30 separatory even; Make full use of the heat exchange area of micro-channel heat exchanger, improve the service behaviour of unit.Cyclone 40 also can be fixedly set in the separating tube 30.

In one embodiment, cyclone 40 comprises a plurality of blades 41.Pivot axial location at cyclone 40 is provided with central shaft 42; Central shaft 42 is arranged in the separating tube 30 along the axial direction of separating tube 30; Blade 41 is provided with along the axial direction of central shaft 42 at interval; And extend around central shaft 42 spirals, and cyclone 40 is arranged in the separating tube 30 through this central shaft 42.

In another embodiment, cyclone 40 is extended to the other end and constitutes from an end continuous helical of central shaft 42 by blade 41.Blade 41 can be the single vane sheet that extends along a side spiral of central shaft 42 or the bispin blade that extends along the opposite side spiral of central shaft 42.

In another embodiment, cyclone 40 also can include only blade 41, and does not comprise central shaft 42, and in this case, the end continuous helical of blade 41 along separating tube 30 axial directions from separating tube 30 extends to the other end of separating tube 30.

In conjunction with referring to shown in Fig. 7～10, separating tube 30 be positioned at the liquid outlet 31 that first collector tube, 10 inner tube walls have a plurality of strips along its length.Liquid outlet 31 is provided with on the tube wall of separating tube 30 in pairs.Liquid outlet 31 can be the not isometric bar seam shape of in axial direction equidistance isometric bar seam shape, equidistance, not isometric bar seam shape of equidistance or the not isometric bar seam shape of equidistance not.The shape of liquid outlet 31 also can be circular.But the liquid outlet 31 of strip can make gas-liquid two-phase refrigerant streamwise discharge while flowing, and the liquid outlet 31 of comparing other shape can better play the effect of separatory.

In one embodiment; Liquid outlet 31 is that the not isometric bar of equidistance does not stitch shape; And the bar of liquid outlet 31 seam length increases progressively along the gas-liquid two-phase refrigerant flow direction in the separating tube 30, and the spacing between the liquid outlet 31 that part is adjacent at least increases progressively along the refrigerant flow direction in the separating tube 30.Because the gas-liquid two-phase refrigerant can reduce flowing velocity gradually in flow process; So the gas-liquid two-phase refrigerant that this set mode of liquid outlet 31 can make speed slow down flows out from the longer liquid outlet 31 of separating tube 30 uniformly, can not influence the stability and the efficient of separatory.

In another embodiment, liquid outlet 31 is the isometric bar seam shape of equidistance, and this set mode is convenient to processing.

In order to improve separatory efficient, liquid outlet 31 is arranged on separating tube 30 and exports on the tube wall of a side towards the tube wall of first collector tube 10.The opening of liquid outlet 31 is towards also exporting a side towards the tube wall of first collector tube 10.The angle of the opening direction of liquid outlet 31 and first collector tube, 10 inwall tangent lines is made as θ; This angle is more little; The opening direction that is liquid outlet 31 helps reducing sound and the mobile sound of refrigerant that the gas-liquid two-phase refrigerant impacts more more towards the tube wall outlet of first collector tube 10.

If the internal diameter of separating tube 30 is d, the gross area of a plurality of liquid outlets 31 is S, then:

$S=\mathrm{\κ}\frac{{\mathrm{\πd}}^2}{4};$

In the formula, k is a restriction coefficient, and value is 0.6～0.95.

What k represented is the perforated area of liquid outlet 31 and the ratio of the area of separating tube 30, and value is less than 1.On behalf of refrigerant, its implication flow into first collector tube 10 from separating tube 30 is that certain pressure drop is arranged, so be called restriction coefficient.

If the total length of liquid outlet 31 is A, the overall width of liquid outlet 31 is B, so, has:

$A=\frac{S}{B}=\mathrm{\κ}\frac{{\mathrm{\πd}}^2}{4B};$

In the formula, the value of B is 0.1～2.0mm.

Liquid outlet 31 with the isometric bar of equidistance seam shape is an example, and the length of establishing separating tube 30 is L, and the distance between two liquid outlet 31 axial directions is m, so because liquid outlet 31 left-right symmetric, and then always total 2L/m liquid outlet 31.

The length n of each bar seam is so:

$n=\frac{A}{2L/m}=\frac{\mathrm{\κ\π}{d}^{2}m}{8\mathrm{BL}}$

In the formula, the span of m is 5～20mm, and the span of n is 2～5mm.

In conjunction with referring to shown in Figure 11～13, in first collector tube 10, be installed with perforated baffle 50.Perforated baffle 50 in axial direction is arranged between the tube wall outlet place tube wall and separating tube 30 of first collector tube 10 at interval, is used for the gas-liquid two-phase refrigerant microminiaturization with a large amount of state of aggregations in first collector tube 10.Perforated baffle 50 can be that welding or buckle are connected with the connected mode of first collector tube, 10 inwalls.Welding can be spot welding.It can be on perforated baffle 50, buckle to be set that buckle connects, and at first collector tube, 10 inwalls draw-in groove is set, thereby perforated baffle 50 is connected with first collector tube 10.Perforated baffle 50 is provided with the corresponding circle in a plurality of tube walls exit position, ellipse or the polygonal perforate with first collector tube 10, is used to make the gas-liquid two-phase refrigerant that flows out separating tube 30 to get into heat exchange unit 80 through the tube wall outlet.

In one embodiment, perforated baffle 50 is the baffle plate of arc for cross section, and arc-shaped concave guarantees that towards the direction at separating tube 30 places perforated baffle 50 has good confluxing and the separatory effect.

In another embodiment, perforated baffle 50 is the baffle plate of arc for cross section, and arc convex is towards the direction at separating tube 30 places.

In conjunction with referring to Figure 14～15; In order to make the full and uniform mixing before getting into separating tube 30 of gas-liquid two-phase refrigerant; The end that separating tube 30 stretches out first collector tube, 10 end faces is connected with gas-liquid separator 60, between the gas-liquid separator 60 and first collector tube 10, is connected with gas-liquid mixed chamber 70.

First end of gas-liquid separator 60 be provided with first the inlet 63, gas-liquid separator 60 with the first end second opposed end be provided with first the outlet 64 and second the outlet 65.

First end of gas-liquid mixed chamber 70 is provided with second inlet 71 that is communicated with second outlet 65, is used to make the gas phase refrigerant entering gas-liquid mixed chamber 70 after the separation.Gas-liquid mixed chamber 70 with the first end second opposed end be provided be communicated with separating tube 30 the 3rd the outlet 72.Gas-liquid mixed chamber 70 be provided with the 3rd inlet 73 that is communicated with first outlet 64 near the 3rd outlet 72 sidewall, be used to make the liquid phase refrigerant entering gas-liquid mixed chamber 70 behind the separatory.Also be provided with the diffusion portion 74 of the little and cross section gradual change in big centre, two ends on the sidewall of gas-liquid mixed chamber 70; The position of diffusion portion 74 is higher than the position of the 3rd inlet 73; Diffusion portion 74 can make the abundant diffusion of gas phase refrigerant; Gas phase refrigerant behind the diffusion can mix with the liquid phase refrigerant behind second end that arrives gas-liquid mixed chamber 70 more fully, improves the separatory efficient and the separatory stability of separating tube 30.

First end of tube connector 62 passes second outlet 65, extend into gas-liquid separator 60 inside, and second end of tube connector 62 is communicated with second inlet 71 of gas-liquid mixed chamber 70.First end of liquid guiding tube 61 passes first outlet 64, stretches into gas-liquid separator 60 inside, and second end of liquid guiding tube 61 is communicated with the 3rd inlet 73.

Liquid guiding tube 61 stretches into second end of the tube section ends of gas-liquid separator 60 inside near gas-liquid separator 60; Tube connector 62 stretches into first end of the tube section ends of gas-liquid separator 60 inside near gas-liquid separator 60, and this set mode makes tube connector 62 be positioned at gas-liquid separator 60 inner length of pipe sections are positioned at gas-liquid separator 60 inside greater than liquid guiding tube 61 length of pipe section.Can play the effect that makes tube connector 62 separate gas phase refrigerant and make liquid guiding tube 61 separation liquid phase refrigerants, make the gas-liquid two-phase refrigerant at gas-liquid separator 60 inner well separatory.

The gas-liquid two-phase refrigerant is divided into gas phase refrigerant and liquid phase refrigerant after getting into gas-liquid separator 60 through first inlet 63 therein.The liquid phase refrigerant is guided to second end of gas-liquid mixed chamber 70 through liquid guiding tube 61; Gas phase refrigerant gets into first end of gas-liquid mixed chamber 70 through tube connector 62; And through flowing to second end behind diffusion portion 74 diffusions; Mix with the liquid phase refrigerant that flows out from liquid guiding tube 61, form uniform gas-liquid two-phase refrigerant and get in the separating tube 30, realize even separatory.Decomposite gas-liquid two-phase refrigerant can reduce the noise when flowing behind 70 diffusions of process gas-liquid mixed chamber simultaneously, improves air-conditioner running environment.

According to the utility model on the other hand, a kind of air-conditioner is provided, has comprised aforementioned any liquid distributing device.

The utility model has solved the problem that the uneven heat exchange area that is caused of micro-channel heat exchanger high frequency refrigeration separating tube separatory can not make full use of, unit capacity reduces, the compressor power consumption increases; Through in collector tube, installing perforated baffle additional, can make the gas-liquid two-phase refrigerant microminiaturization of a large amount of gatherings, play flowing out the better distributional effects of gas-liquid two-phase refrigerant in the separating tube, make the gas-liquid two-phase refrigerant more even distribution that gets in the micro-channel tubes.

More than be merely the preferred embodiment of the utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various changes and variation.All within the spirit and principle of the utility model, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the utility model.

Claims (9)

1. a liquid distributing device is characterized in that, comprising:

Heat exchange unit (80);

First collector tube (10), the both ends of the surface sealing, and be provided with a plurality of tube wall outlets on the tube wall of said first collector tube (10) along its length, said a plurality of tube wall outlets are communicated with said heat exchange unit (80);

Separating tube (30); Be arranged in said first collector tube (10); One end of said separating tube (30) stretches out from the end face of said first collector tube (10), and the tube wall of said separating tube (30) is provided with liquid outlet, said liquid outlet and said first collector tube (10) internal communication; And

Perforated baffle (50) is positioned at said first collector tube (10) inside, and in axial direction is arranged at interval between the said tube wall outlet place tube wall and said separating tube (30) of said first collector tube (10).

2. liquid distributing device according to claim 1 is characterized in that, the position of opening of said perforated baffle (50) is corresponding with the position of said a plurality of tube wall outlets of said first collector tube (10).

3. liquid distributing device according to claim 1 is characterized in that, the cross section of said perforated baffle (50) is an arc, and the concave surface of said arc is towards the direction at said separating tube (30) place.

4. liquid distributing device according to claim 1 is characterized in that, the cross section of said perforated baffle (50) is an arc, and the convex surface of said arc is towards the direction at said separating tube (30) place.

5. liquid distributing device according to claim 1 is characterized in that, said perforated baffle (50) welding perhaps is connected on the inwall of said first collector tube (10).

6. according to each described liquid distributing device in the claim 1～5; It is characterized in that; Said heat exchange unit (80) comprises a plurality of micro-channel tubes that are parallel to each other (81), and each said micro-channel tubes (81) exports corresponding one by one connection with the said a plurality of said tube wall of said first collector tube (10) respectively.

7. liquid distributing device according to claim 6 is characterized in that, the end shape of said micro-channel tubes (81) is corresponding with the outside wall surface of said first collector tube (10).

8. according to each described liquid distributing device in the claim 1～5, it is characterized in that said separating tube (30) is arranged in said first collector tube (10) along the direction off-centre away from said perforated baffle (50).

9. an air-conditioner comprises liquid distributing device, it is characterized in that, said liquid distributing device is each described liquid distributing device in the claim 1～8.

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