CN105258411A - Gas-liquid separating pipe for heat exchanger and heat exchanger - Google Patents
Gas-liquid separating pipe for heat exchanger and heat exchanger Download PDFInfo
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- CN105258411A CN105258411A CN201510658769.7A CN201510658769A CN105258411A CN 105258411 A CN105258411 A CN 105258411A CN 201510658769 A CN201510658769 A CN 201510658769A CN 105258411 A CN105258411 A CN 105258411A
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- 239000007788 liquid Substances 0.000 title claims abstract description 222
- 239000003507 refrigerant Substances 0.000 claims abstract description 127
- 238000000926 separation method Methods 0.000 claims description 151
- 230000008859 change Effects 0.000 claims description 56
- 238000005192 partition Methods 0.000 claims description 40
- 230000008676 import Effects 0.000 claims description 29
- 239000011148 porous material Substances 0.000 claims description 17
- 239000012071 phase Substances 0.000 abstract description 26
- 238000009826 distribution Methods 0.000 abstract description 16
- 239000007791 liquid phase Substances 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000005514 two-phase flow Effects 0.000 description 1
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Abstract
The invention provides a gas-liquid separating pipe for a heat exchanger and the heat exchanger. The gas-liquid separating pipe comprises a main body section and at least one open area variation section (63). The main body section comprises a top inlet and a bottom outlet, a refrigerant inlet channel (61) and an air guiding channel (62) are separately arranged at the inlet, the open area variation sections (63) are located below the inlet, and the open area of each open area variation section (63) is smaller than that of the main body section. By means of the technical scheme, the problems that in the prior art, gas-phase refrigerants and liquid-phase refrigerants in a heat exchanger are not uniform in distribution and the heat exchange performance is poor can be effectively solved.
Description
Technical field
The present invention relates to technical field of heat exchange, in particular to a kind of gas-liquid separation pipe for heat exchanger and heat exchanger.
Background technology
Within air-conditioning systems, cold-producing medium is the state of gas-liquid two-phase after expansion valve, in order to ensure heat exchange property, usually can arrange gas-liquid separator before the import of heat exchanger, making the cold-producing medium entering heat exchanger be liquid phase state cold-producing medium.But, in existing micro-channel heat exchanger, because in header, space is larger, liquid phase refrigerant after external gas-liquid separator separates is from after the import of heat exchanger enters header, again the state of gas-liquid two-phase can be become, thus make the gas-liquid two-phase state distribution of refrigerant in header uneven, not only cause whole heat exchanger heat exchange uneven, and reduce heat exchange property.
Summary of the invention
Main purpose of the present invention is to provide a kind of gas-liquid separation pipe for heat exchanger and heat exchanger, to solve the gas-liquid two-phase state cold-producing medium maldistribution in heat exchanger of the prior art, the problem that heat exchange property is bad.
To achieve these goals, according to an aspect of the present invention, provide a kind of gas-liquid separation pipe for heat exchanger, gas-liquid separation pipe comprises main paragraph and at least one section of area of passage change section, main paragraph comprises the import being positioned at top and the outlet being positioned at bottom, import department is provided with the cold-producing medium admission passage and air guide channel that are separated, and area of passage change section is positioned at the below of import, and the area of passage of area of passage change section is less than the area of passage of main paragraph.
Further, the ratio of the area of passage change area of passage of section and the area of passage of main paragraph is 0.4 to 0.8.
Further, area of passage change section is formed by necking segment.
Further, area of passage change section is positioned at the middle and lower part of gas-liquid separation pipe.
Further, cold-producing medium admission passage and air guide channel are juxtaposed on the upper end of main paragraph and are connected with main paragraph respectively.
Further, gas-liquid separation pipe also comprises the first dividing plate, and the first dividing plate extends downward in main paragraph, and main paragraph is separated to form cold-producing medium admission passage and air guide channel by the first dividing plate.
Further, gas-liquid separation pipe also comprises at least one baffle plate be arranged in air guide channel, and baffle plate is provided with sorting hole.
Further, gas-liquid separation pipe also comprises coarse structure, coarse structure be at least arranged on be positioned at area of passage change section top main paragraph inner surface on and/or area of passage change section upper end inner surface on.
According to a further aspect in the invention, provide a kind of heat exchanger, comprise multiple heat exchanger tube, refrigerant inlet, refrigerant outlet, upper header and lower header, upper header is arranged on the top of heat exchanger tube and is communicated with heat exchanger tube, lower header is arranged on the below of heat exchanger tube and is communicated with heat exchanger tube, heat exchanger also comprises gas-liquid separation pipe, and gas-liquid separation pipe is above-mentioned gas-liquid separation pipe.
Further, heat exchanger also comprises second partition, and second partition is arranged in lower header.
Further, second partition is multiple, and multiple second partition is arranged along interval, flow of refrigerant direction, and each second partition has throttle orifice, and throttle orifice is positioned at the bottom of second partition.
Further, second partition is also provided with pore, the area of pore is greater than the area of throttle orifice.
Further, the lower end of heat exchanger tube is inserted in lower header and forms inserting paragraph, and pore is between adjacent two inserting paragraphs, and the position of pore is higher than the lower port of heat exchanger tube.
Further, the distance between two adjacent second partitions increases gradually along flow of refrigerant direction.
Further, the area of the throttle orifice of multiple second partition reduces gradually along flow of refrigerant direction.
Further, heat exchanger also comprises wireway, and wireway is arranged on the outside of header, and the import of wireway is communicated with the air guide channel of gas-liquid separation pipe, and the outlet of wireway is communicated with refrigerant outlet.
Further, gas-liquid separation pipe is between two heat exchanger tubes of arbitrary neighborhood, and the import of gas-liquid separation pipe is communicated with upper header, and the outlet of gas-liquid separation pipe is communicated with lower header.
Further, gas-liquid separation pipe is positioned at the refrigerant inlet place of heat exchanger, the import of gas-liquid separation pipe is communicated with the end of upper header or the import of gas-liquid separation pipe forms refrigerant inlet, the outlet of gas-liquid separation pipe is communicated with lower header, the cold-producing medium admission passage of gas-liquid separation pipe is communicated with refrigerant inlet, and the air guide channel of gas-liquid separation pipe is communicated with refrigerant outlet.
Further, heat exchanger also comprises the 3rd dividing plate, 3rd dividing plate to be arranged in header and to be separated by upper header, gas-liquid separation pipe also comprises the first dividing plate, first dividing plate extends downward in main paragraph, main paragraph is separated to form cold-producing medium admission passage and air guide channel by the first dividing plate, and the 3rd dividing plate is corresponding with the first dividing plate of gas-liquid separation pipe to be connected.
Further, the 3rd dividing plate and the first dividing plate are formed in one structure.
Further, area of passage change section is positioned at the junction of gas-liquid separation pipe and lower header.
Further, the cross section of gas-liquid separation pipe is rectangular.
Apply technical scheme of the present invention, main paragraph and at least one section of area of passage change section are set, and the area of passage of area of passage change section is less than the area of passage of main paragraph.Meanwhile, the cold-producing medium admission passage and air guide channel that are separated is provided with in the import department of main paragraph.When using gas-liquid separation pipe to carry out gas-liquid separation, gas-liquid two-phase cold-producing medium is entered in gas-liquid separation pipe by cold-producing medium admission passage.Because the area of passage of area of passage change section is little compared with the area of passage of main paragraph, when gas-liquid two-phase cold-producing medium is reduced by flow velocity during above-mentioned area of passage change section, the gaseous refrigerant in cold-producing medium and liquid refrigerant are separated.The gaseous refrigerant separated through gas-liquid separation pipe and liquid refrigerant can enter follow-up equipment and carry out work, and such as, liquid refrigerant enters heat exchanger tube and carries out heat exchange, and gaseous refrigerant directly passes into compressor and recycles.The gaseous refrigerant in gas-liquid two-phase state cold-producing medium isolated by above-mentioned gas-liquid separation pipe, and liquid phase refrigerant participates in follow-up distribution and heat exchange, not only solves gas-liquid two-phase state cold-producing medium and distributes uneven problem, and improve the heat transfer effect of heat exchanger.
Accompanying drawing explanation
The Figure of description forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 shows the structural representation of the embodiment one according to heat exchanger of the present invention;
Fig. 2 shows the schematic front view of the heat exchanger of Fig. 1;
Fig. 3 shows the first partial enlarged drawing of the heat exchanger of Fig. 2;
Fig. 4 shows the second partial enlarged drawing of the heat exchanger of Fig. 2;
Fig. 5 shows the structural representation of the second partition of the heat exchanger of Fig. 1;
Fig. 6 shows the first dividing plate of the heat exchanger of Fig. 1 and the structural representation of the 3rd dividing plate;
Fig. 7 shows the structural representation of the embodiment two according to heat exchanger of the present invention;
Fig. 8 shows the schematic front view of the heat exchanger of Fig. 7;
Fig. 9 shows the first partial enlarged drawing of the heat exchanger of Fig. 8; And
Figure 10 shows the second partial enlarged drawing of the heat exchanger of Fig. 8.
Wherein, above-mentioned accompanying drawing comprises the following drawings mark:
10, heat exchanger tube; 20, upper header; 30, lower header; 40, refrigerant inlet; 50, refrigerant outlet; 60, gas-liquid separation pipe; 61, cold-producing medium admission passage; 62, air guide channel; 63, area of passage change section; 70, baffle plate; 81, the first dividing plate; 82, second partition; 821, throttle orifice; 822, pore; 83, the 3rd dividing plate; 90, wireway.
Detailed description of the invention
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
As shown in Figures 2 and 3, the gas-liquid separation pipe of the present embodiment is used for the gas-liquid separation of heat exchanger.Above-mentioned gas-liquid separation pipe comprises main paragraph and one section of area of passage change section 63.Wherein, main paragraph comprises the import being positioned at top and the outlet being positioned at bottom.Import department is provided with the cold-producing medium admission passage 61 and air guide channel 62 that are separated.Area of passage change section 63 is positioned at the below of import.The area of passage of area of passage change section 63 is less than the area of passage of main paragraph.
The gas-liquid separation pipe of application the present embodiment, arrange main paragraph and one section of area of passage change section 63, and the area of passage of area of passage change section 63 is less than the area of passage of main paragraph.Meanwhile, the cold-producing medium admission passage 61 and air guide channel 62 that are separated is provided with in the import department of main paragraph.When using gas-liquid separation pipe to carry out gas-liquid separation, gas-liquid two-phase cold-producing medium is entered in gas-liquid separation pipe by cold-producing medium admission passage 61.Because the area of passage of area of passage change section 63 is little compared with the area of passage of main paragraph, when gas-liquid two-phase cold-producing medium is reduced by flow velocity during above-mentioned area of passage change section 63, the gaseous refrigerant in cold-producing medium and liquid refrigerant are separated.The gaseous refrigerant separated through gas-liquid separation pipe and liquid refrigerant can enter follow-up equipment and carry out work, and such as, liquid refrigerant enters heat exchanger tube and carries out heat exchange, and gaseous refrigerant directly passes into compressor and recycles.The gaseous refrigerant in gas-liquid two-phase state cold-producing medium isolated by above-mentioned gas-liquid separation pipe, and liquid phase refrigerant participates in follow-up distribution and heat exchange, not only solves gas-liquid two-phase state cold-producing medium and distributes uneven problem, and improve the heat transfer effect of heat exchanger.In the present embodiment, area of passage change section 63 is one section, and certainly, the quantity of area of passage change section 63 is not limited thereto, and in other embodiments unshowned in the drawings, area of passage change section 63 can be multistage.
As shown in Figures 2 and 3, in the gas-liquid separation pipe of the present embodiment, the ratio of the area of passage change area of passage of section 63 and the area of passage of main paragraph is 0.4 to 0.8.Above-mentioned area of passage change section 63 can enable gas-liquid two-phase cold-producing medium effectively be separated with the ratio range of the area of passage of main paragraph, and cold-producing medium can be made again to keep circulation relatively, avoids cold-producing medium to be too much stacked on area of passage change section 63 place.
As shown in Figures 2 and 3, in the gas-liquid separation pipe of the present embodiment, area of passage change section 63 is formed by necking segment.In the present embodiment, gas-liquid separation pipe has necking segment, the outer tube wall of this necking segment and inner tubal wall are all in contraction-like, and namely the sectional area of necking segment outer tube wall is less than the sectional area of main paragraph outer tube wall, and the sectional area of necking segment inner tubal wall is less than the sectional area of main paragraph inner tubal wall.Area of passage change section 63 is formed by above-mentioned necking segment, is so more easy to processing and manufacturing.Certainly, the generation type of area of passage change section 63 is not limited thereto, and in other embodiments unshowned in the drawings, area of passage change section 63 also can be formed by the mode of the pipe thickness only changing gas-liquid separation pipe.
As shown in Figures 2 and 3, in the gas-liquid separation pipe of the present embodiment, area of passage change section 63 is positioned at the middle and lower part of gas-liquid separation pipe.Because area of passage change section 63 is positioned at the middle and lower part of gas-liquid separation pipe, liquid refrigerant so just can be made to enter the flow velocity of the larger subsequent structural in space (such as heat exchanger lower header) relatively smaller, thus alleviate the phenomenon that liquid refrigerant again becomes gas-liquid two-phase in larger space, and then make distribution of refrigerant more even.
As shown in Figures 2 and 3, in the gas-liquid separation pipe of the present embodiment, cold-producing medium admission passage 61 and air guide channel 62 are juxtaposed on the upper end of main paragraph and are connected with main paragraph respectively.Gas-liquid separation pipe also comprises the first dividing plate 81.First dividing plate 81 extends downward in main paragraph, and main paragraph is separated to form cold-producing medium admission passage 61 and air guide channel 62 by the first dividing plate 81.When gas-liquid two-phase cold-producing medium enters in cold-producing medium admission passage 61, clash into the first dividing plate 81, refrigerant velocities reduces, after this area of passage change section 63 of gas-liquid separation pipe is flowed through again, the speed of cold-producing medium declines further, and at area of passage change section 63 place, forming section is piled up, and gas-liquid two-phase is separated, gaseous refrigerant moves upward, and is derived by air guide channel 62.
As shown in Figures 2 and 3, in the gas-liquid separation pipe of the present embodiment, gas-liquid separation pipe also comprises the baffle plate 70 be arranged in air guide channel 62, and baffle plate 70 is provided with sorting hole.In the present embodiment, baffle plate 70 is two.Each baffle plate 70 is provided with sorting hole, thus air-flow is slowed down further, gaseous refrigerant is separated again, prevent gaseous refrigerant from carry liquid refrigerant and together flow to follow-up equipment (such as compressor), affect the performance of compressor, and avoid liquid refrigerant flows out reduction liquid refrigerant utilization rate from air guide channel 62.In addition, because the area of passage of the area of passage change section 63 of gas-liquid separation pipe reduces, cold-producing medium is easily made to pile up thus cause liquid level to rise.When the liquid level in gas-liquid separation pipe is increased to baffle plate 70 place, baffle plate 70 can apply certain resistance to it.While avoiding liquid refrigerant directly to be flowed out by air guide channel 62, can also form downward pressure to the cold-producing medium in gas-liquid separation pipe like this, impel more cold-producing medium by area of passage change section 63, thus reduce refrigerant level.It should be noted that, the quantity of baffle plate 70 is not limited thereto, and in other embodiments unshowned in the drawings, baffle plate 70 also can be one.
In the gas-liquid separation pipe of the present embodiment, gas-liquid separation pipe also comprises coarse structure (not shown).Coarse structure is arranged on the inner surface of the upper end of area of passage change section 63.This coarse structure can be irregular rough surface, also can be the rough surface of the rule by the formation such as machining screw or annular knurl line.Said structure can reduce the flow velocity of the cold-producing medium flowing into area of passage change section 63 further, thus improves gas-liquid separation effect.Certainly, the setting position of coarse structure is not limited thereto, and in other embodiments, also can be arranged on the inner surface of the main paragraph of the top being positioned at area of passage change section 63, or be arranged on the inner surface of area of passage change section 63, so also can play the effect reducing refrigerant flow rates.
As shown in Figure 1 to Figure 3, present invention also provides a kind of heat exchanger.Multiple heat exchanger tube 10, refrigerant inlet 40, refrigerant outlet 50, upper header 20 and lower header 30 is comprised according to the embodiment one of the heat exchanger of the application.Wherein, upper header 20 is arranged on the top of heat exchanger tube 10 and is communicated with heat exchanger tube 10.Lower header 30 is arranged on the below of heat exchanger tube 10 and is communicated with heat exchanger tube 10.Fin is provided with between multiple heat exchanger tube 10.Heat exchanger also comprises gas-liquid separation pipe 60.Gas-liquid separation pipe 60 is above-mentioned gas-liquid separation pipe.In the present embodiment, gas-liquid separation pipe 60 is between two heat exchanger tubes 10 of arbitrary neighborhood.The import of gas-liquid separation pipe 60 is communicated with upper header 20, and the outlet of gas-liquid separation pipe 60 is communicated with lower header 30.Namely the heat exchanger of embodiment one is double loop micro-channel heat exchanger.This double loop micro-channel heat exchanger is divided into two loops.Gas-liquid separation pipe 60 is arranged between two loops.
As shown in Figure 1 to Figure 3, in the heat exchanger of embodiment one, gas-liquid separation pipe 60 is between two heat exchanger tubes 10 of arbitrary neighborhood, and the import of the cold-producing medium admission passage 61 of gas-liquid separation pipe 60 is communicated with upper header 20.The outlet of the air guide channel 62 of gas-liquid separation pipe 60 is communicated with refrigerant outlet 50.The outlet of gas-liquid separation pipe 60 is communicated with lower header 30.When heat exchanger carries out heat exchange, after gas-liquid two-phase cold-producing medium enters lower header 30 by refrigerant inlet 40, rise through the heat exchanger tube 10 being positioned at gas-liquid separation pipe 60 first side and carry out a heat exchange, the cold-producing medium after heat exchange arrives upper header 20 (the first loop).Generally, the above-mentioned quantity being positioned at the heat exchanger tube 10 of gas-liquid separation pipe 60 first side is oppositely arranged few, and gaseous refrigerant agent content in the cold-producing medium after a heat exchange so just can be avoided too high.After a heat exchange, gas-liquid two-phase cold-producing medium carries out gas-liquid separation by the gas-liquid separation pipe 60 vertically arranged, the gaseous refrigerant separated flow to refrigerant outlet 50 by air guide channel 62, and enter compressor and recycle, the liquid refrigerant separated flows into lower header 30 and carries out secondary heat exchange by the heat exchanger tube 10 being positioned at gas-liquid separation pipe 60 second side, cold-producing medium after heat exchange arrives upper header 20, and enters compressor and carry out recycling (second servo loop).The heat exchanger of the present embodiment arranges gas-liquid separation pipe 60 between two heat exchanger tubes 10 of arbitrary neighborhood, gas-liquid separation can be carried out to the cold-producing medium in the lower header 30 below the heat exchanger tube 10 entering into gas-liquid separation pipe 60 second side, thus reduce the flow of the gaseous refrigerant in lower header 30, make the distribution of refrigerant in lower header 30 more even, thus improve the heat exchange property of heat exchanger.Meanwhile, the gaseous refrigerant separated through gas-liquid separation pipe 60 can pass into refrigerant outlet 50, and flow to compressor and recycle, and improves the utilization rate of cold-producing medium.
It should be noted that, the heat exchanger of the present embodiment is double loop micro-channel heat exchanger, certainly, the concrete structure of heat exchanger is not limited thereto, in other embodiments unshowned in the drawings, heat exchanger can be the heat exchange structure of other types, such as, heat exchanger can be three loop micro-channel heat exchangers, and gas-liquid separation pipe 60 is arranged on the first loop and second servo loop and/or between second servo loop and tertiary circuit.
In the prior art, in order to make the distribution of refrigerant in the header of micro-channel heat exchanger more even, usually can arrange distributing pipe, distribution plate or other distribution structures, carry out the distribution of two phase flow.If but when this heat exchanger is multipaths, the structure of internal distribution just cannot be realized by single distributing pipe or plate, manufacturing processing technic difficulty.
As shown in Figure 4 and Figure 5, in the heat exchanger of embodiment one, heat exchanger also comprises second partition 82.Second partition 82 is arranged in lower header 30.Second partition 82 is multiple, and multiple second partition 82 is arranged along interval, flow of refrigerant direction, and each second partition 82 has throttle orifice 821, and throttle orifice 821 is positioned at the bottom of second partition 82.When liquid refrigerant flows into lower header 30, due to the effect of inertia, liquid refrigerant is easily deposited in the far-end (lower header 30 is away from one end of gas-liquid separation pipe 60) of lower header 30.In order to avoid above-mentioned phenomenon occurs, in the lower header 30 of the present embodiment, multiple spaced second partition 82 is set.Lower header 30 is divided into some compartments by above-mentioned second partition 82, and liquid refrigerant is circulated between each compartment by the throttle orifice 821 on second partition 82.Said structure can reduce the flow velocity of liquid refrigerant, prevents liquid refrigerant to be directly stacked into the far-end of lower header 30, makes distribution of refrigerant more even, thus makes cold-producing medium enter into heat exchanger tube 10 more equably.Meanwhile, above-mentioned second partition 82 structure is simple, is easy to manufacture, and highly versatile.In the present embodiment, throttle orifice 821 is one, and certainly, the quantity of throttle orifice 821 is not limited thereto, and in other embodiments unshowned in the drawings, throttle orifice 821 can be multiple.
As shown in Figure 4 and Figure 5, in the heat exchanger of embodiment one, second partition 82 is also provided with pore 822, the area of pore 822 is greater than the area of throttle orifice 821.Some gases can be remained unavoidably in liquid refrigerant in lower header 30.Because the flow velocity of gas is generally fast than liquid, in order to avoid liquid refrigerant is deposited in the far-end of lower header 30, gas storage is at the near-end (lower header 30 is near one end of gas-liquid separation pipe 60) of lower header 30, the pore 822 of the present embodiment is set to erose macropore, and throttle orifice 821 is set to circular aperture.Gas residual in liquid refrigerant can be circulated between each compartment by above-mentioned pore 822, the gas-liquid two-phase state cold-producing medium in lower header 30 is distributed more even.
As shown in Figure 4 and Figure 5, in the heat exchanger of embodiment one, the lower end of heat exchanger tube 10 is inserted in lower header 30 and forms inserting paragraph.Pore 822 is between adjacent two inserting paragraphs, and the position of pore 822 is higher than the lower port of heat exchanger tube 10.Said structure avoids gas directly to flow to heat exchanger tube 10 while can flowing into heat exchanger tube 10 being convenient to liquid refrigerant.In addition, when the liquid level of liquid refrigerant is higher than pore 822 place plane, liquid refrigerant also can spill into next compartment from this pore 822.Said structure makes the cold-producing medium of each compartment of lower header 30 relatively uniform, avoids gaseous refrigerant and is deposited in one end, and liquid refrigerant is deposited in the situation of the other end, make gas-liquid two-phase cold-producing medium distribute evenly.
As shown in Figure 4 and Figure 5, in the heat exchanger of embodiment one, the distance between two adjacent second partitions 82 increases gradually along flow of refrigerant direction.Said structure makes the space of the compartment of the near-end of lower header 30 be less than the space of the compartment of the far-end of lower header 30, and gas and liquid refrigerant can be made like this to squeeze mutually, is more conducive to being discharged to by gas in compartment below.Meanwhile, said structure can ensure the amount of the liquid refrigerant of the near-end of lower header 30, makes it have the height of certain liquid, enters heat exchanger tube 10 complete follow-up heat exchange to realize liquid refrigerant.Certainly, the set-up mode of second partition 82 is not limited thereto, and in other embodiments unshowned in the drawings, multiple second partition 82 also can be uniformly distributed.
As shown in Figure 4, in the heat exchanger of embodiment one, the area of the throttle orifice 821 of multiple second partition 82 reduces gradually along flow of refrigerant direction.Because the liquid refrigerant be in each compartment of lower header 30 is different with gas ratio, the throttle orifice 821 of each second partition 82 can be different, the aperture area of the throttle orifice 821 of the second partition 82 of lower header 30 near-end is greater than the aperture area of the throttle orifice 821 of the second partition 82 of lower header 30 far-end, the effect of throttling separatory further can be realized like this, and be convenient to more flow of refrigerant to the back-end, thus make distribution of refrigerant more even.
As depicted in figs. 1 and 2, in the heat exchanger of embodiment one, heat exchanger also comprises wireway 90.Wireway 90 is arranged on the outside of header 20.The import of wireway 90 is communicated with the air guide channel 62 of gas-liquid separation pipe 60.The outlet of wireway 90 is communicated with refrigerant outlet 50.Said structure can make the gaseous refrigerant separated through gas-liquid separation pipe 60 directly pass into refrigerant outlet 50 by air guide channel 62 and wireway 90, and enter compressor and recycle, the gas separaion that can will produce in a heat exchange like this, and directly discharge heat exchanger, most of liquid refrigerant is only allowed to enter into the second heat exchange area, carry out evaporation and heat-exchange, can produce like this evenly heat transfer effect, significantly promote the performance of unit; Compressor is entered after the gas that twice evaporation produces mixes.In the present embodiment, wireway 90 is provided with valve, this valve can control the flow of gas in wireway 90 as required.
As shown in Fig. 2, Fig. 3 and Fig. 6, in the heat exchanger of embodiment one, heat exchanger also comprises the 3rd dividing plate 83.3rd dividing plate 83 to be arranged in header 20 and to be separated by upper header 20.3rd dividing plate 83 is corresponding with the first dividing plate 81 of gas-liquid separation pipe 60 to be connected.In the present embodiment, the 3rd dividing plate 83 is removably connected by the mode such as grafting, riveted joint with the first dividing plate 81.When gas-liquid separation pipe 60 is pulled down from upper header 20 by needs, the 3rd dividing plate 83 and the first dividing plate 81 can be separated.When gas-liquid separation pipe 60 is arranged on upper header 20 by needs, the 3rd dividing plate 83 and the first dividing plate 81 can link together again, make more convenient to operate like this.Certainly, the set-up mode of the 3rd dividing plate 83 and the first dividing plate 81 is not limited thereto, and in other embodiments, the 3rd dividing plate 83 and the first dividing plate 81 also can be formed in one structure.
As shown in Figure 1 to Figure 3, in the heat exchanger of embodiment one, area of passage change section 63 is positioned at the middle and lower part of gas-liquid separation pipe 60.Liquid refrigerant enters lower header 30 after slowing down in above-mentioned area of passage change section 63.Because area of passage change section 63 is positioned at the middle and lower part of gas-liquid separation pipe 60, so just can liquid refrigerant to enter the flow velocity after lower header 30 relatively smaller, thus alleviate the phenomenon that liquid refrigerant again becomes gas-liquid two-phase in the lower header 30 that space is larger, and then make distribution of refrigerant more even, improve heat exchange property.Certainly, the setting position of area of passage change section 63 is not limited thereto, in other embodiments unshowned in the drawings, area of passage change section 63 can be positioned at the junction of gas-liquid separation pipe 60 and lower header 30, directly enter lower header 30 after can making like this to slow down in above-mentioned area of passage change section 63, make distribution of refrigerant even further.
In the heat exchanger of embodiment one, the cross section of gas-liquid separation pipe 60 is rectangular, and its width is identical with the width of heat exchanger tube 10, is convenient to like this arrange fin for heat exchange between gas-liquid separation pipe 60 and adjacent heat exchanger tube 10, makes full use of space, improves heat exchange efficiency.As shown in Figure 6, the shape of the 3rd dividing plate 83 and the shape of upper header 20 suitable, rounded.The shape of the first dividing plate 81 and the shape of gas-liquid separation pipe 60 suitable, rectangular.
As shown in Figure 7 to 10, the heat exchanger of embodiment two and the main distinction of embodiment one are, gas-liquid separation pipe 60 is positioned at refrigerant inlet 40 place of heat exchanger.The import of gas-liquid separation pipe 60 is communicated with the end of upper header 20.The outlet of gas-liquid separation pipe 60 is communicated with lower header 30, the cold-producing medium admission passage 61 of gas-liquid separation pipe 60 is communicated with refrigerant inlet 40 by the end of upper header 20, and the air guide channel 62 of gas-liquid separation pipe 60 is communicated with refrigerant outlet 50 by the end of upper header 20.Namely the heat exchanger of embodiment two is single loop micro-channel heat exchanger.Be positioned at the gas-liquid separation pipe 60 at refrigerant inlet 40 place of heat exchanger, its upper and lower side is communicated with the end of lower header 30 with upper header 20, is arranged between header 20 and lower header 30, makes overall structure compacter.
As shown in Figure 7 to 10, in the heat exchanger of embodiment two, gas-liquid separation pipe 60 is positioned at refrigerant inlet 40 place of heat exchanger.The cold-producing medium admission passage 61 of gas-liquid separation pipe 60 is communicated with refrigerant inlet 40, and the air guide channel 62 of gas-liquid separation pipe 60 is communicated with refrigerant outlet 50, and the outlet of gas-liquid separation pipe 60 is communicated with lower header 30.When heat exchanger carries out heat exchange, gas-liquid two-phase cold-producing medium enters into gas-liquid separation pipe 60 by refrigerant inlet 40, cold-producing medium admission passage 61, and carries out gas-liquid separation by the gas-liquid separation pipe 60 vertically arranged.The liquid refrigerant separated through gas-liquid separation pipe 60 flows directly into lower header 30, rise through heat exchanger tube 10 again and carry out heat exchange, liquid refrigerant after heat exchange becomes gaseous state and arrives in upper header 20, after this, the cold-producing medium becoming gaseous state is passed into compressor by refrigerant outlet 50 and recycles.In addition, the gaseous refrigerant separated through gas-liquid separation pipe 60 flows to refrigerant outlet 50 by air guide channel 62 and wireway 90, and passes into compressor and recycle.The heat exchanger of the present embodiment arranges gas-liquid separation pipe 60 at refrigerant inlet 40 place of heat exchanger, gas-liquid separation can be carried out to the cold-producing medium entered in lower header 30, thus reduce the flow of the gaseous refrigerant in lower header 30, make the distribution of refrigerant in lower header 30 more even, thus improve the heat exchange property of heat exchanger.Meanwhile, the gaseous refrigerant separated through gas-liquid separation pipe 60 can pass into refrigerant outlet 50, and flow to compressor and recycle, and improves the utilization rate of cold-producing medium.Other structures of the heat exchanger of the present embodiment and operation principle are substantially identical with embodiment one, do not repeat them here.
The heat exchanger of embodiment three and the main distinction of embodiment two are, the import of gas-liquid separation pipe 60 forms refrigerant inlet 40 (not shown).In the present embodiment, the import of the cold-producing medium admission passage 61 of gas-liquid separation pipe 60 forms above-mentioned refrigerant inlet 40.When heat exchanger carries out heat exchange, gas-liquid two-phase cold-producing medium directly enters into gas-liquid separation pipe 60 by the import of cold-producing medium admission passage 61.Other structures of the heat exchanger of the present embodiment and operation principle are substantially identical with embodiment two, do not repeat them here.
As can be seen from the above description, the above embodiments of the present invention achieve following technique effect:
In single loop heat exchanger, the import at the refrigerant inlet place or gas-liquid separation pipe that gas-liquid separation pipe can be set directly at heat exchanger forms refrigerant inlet, in Multi-circuit heat exchanger, gas-liquid separation pipe can be arranged between loop and loop.Gas-liquid two-phase cold-producing medium is separated by gas-liquid separation pipe, the gaseous refrigerant separated directly flows to refrigerant outlet by wireway, and pass into compressor and recycle, the liquid refrigerant separated enters in lower header, then by second partition, be assigned to equably in every root heat exchanger tube.Especially, in Multi-circuit heat exchanger, gas-liquid separation pipe can carry out gas-liquid separation to gas-liquid two-phase cold-producing medium between two loops, isolates the gaseous refrigerant in the cold-producing medium of upper level loop heat exchange, thus improves overall heat exchange performance.In addition, gas-liquid separation pipe vertically arranges and overall structure can be made compacter.The structure of second partition and setting position make separatory more even, and structure is simple, is easy to processing.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (22)
1. the gas-liquid separation pipe for heat exchanger, it is characterized in that, described gas-liquid separation pipe comprises main paragraph and at least one section of area of passage change section (63), described main paragraph comprises the import being positioned at top and the outlet being positioned at bottom, described import department is provided with the cold-producing medium admission passage (61) and air guide channel (62) that are separated, described area of passage change section (63) is positioned at the below of described import, and the area of passage of described area of passage change section (63) is less than the area of passage of described main paragraph.
2. gas-liquid separation pipe according to claim 1, is characterized in that, the ratio of the described area of passage of area of passage change section (63) and the area of passage of described main paragraph is 0.4 to 0.8.
3. gas-liquid separation pipe according to claim 1, is characterized in that, described area of passage change section (63) is formed by necking segment.
4. gas-liquid separation pipe according to any one of claim 1 to 3, is characterized in that, described area of passage change section (63) is positioned at the middle and lower part of described gas-liquid separation pipe.
5. gas-liquid separation pipe according to claim 1, is characterized in that, described cold-producing medium admission passage (61) and described air guide channel (62) are juxtaposed on the upper end of described main paragraph and are connected with described main paragraph respectively.
6. gas-liquid separation pipe according to claim 5, it is characterized in that, described gas-liquid separation pipe also comprises the first dividing plate (81), described first dividing plate (81) extends downward in described main paragraph, and described main paragraph is separated to form described cold-producing medium admission passage (61) and described air guide channel (62) by described first dividing plate (81).
7. gas-liquid separation pipe according to claim 5, it is characterized in that, described gas-liquid separation pipe also comprises at least one baffle plate (70) be arranged in described air guide channel (62), and (70) are provided with sorting hole to described baffle plate.
8. gas-liquid separation pipe according to any one of claim 1 to 3, it is characterized in that, described gas-liquid separation pipe also comprises coarse structure, described coarse structure be at least arranged on be positioned at described area of passage change section (63) top described main paragraph inner surface on and/or described area of passage change section (63) upper end inner surface on.
9. a heat exchanger, comprise multiple heat exchanger tube (10), refrigerant inlet (40), refrigerant outlet (50), upper header (20) and lower header (30), described upper header (20) is arranged on the top of described heat exchanger tube (10) and is communicated with described heat exchanger tube (10), described lower header (30) is arranged on the below of described heat exchanger tube (10) and is communicated with described heat exchanger tube (10), it is characterized in that, described heat exchanger also comprises gas-liquid separation pipe (60), the gas-liquid separation pipe of described gas-liquid separation pipe (60) according to any one of claim 1 to 8.
10. heat exchanger according to claim 9, is characterized in that, described heat exchanger also comprises second partition (82), and described second partition (82) is arranged in described lower header (30).
11. heat exchangers according to claim 10, it is characterized in that, described second partition (82) is for multiple, multiple described second partition (82) is arranged along interval, flow of refrigerant direction, each described second partition (82) has throttle orifice (821), and described throttle orifice (821) is positioned at the bottom of described second partition (82).
12. heat exchangers according to claim 11, is characterized in that, described second partition (82) are also provided with pore (822), and the area of described pore (822) is greater than the area of described throttle orifice (821).
13. heat exchangers according to claim 12, it is characterized in that, the lower end of described heat exchanger tube (10) is inserted in described lower header (30) and forms inserting paragraph, described pore (822) is between adjacent two described inserting paragraphs, and the position of described pore (822) is higher than the lower port of described heat exchanger tube (10).
14. heat exchangers according to claim 11, is characterized in that, the distance between two adjacent described second partitions (82) increases gradually along described flow of refrigerant direction.
15. heat exchangers according to claim 11, is characterized in that, the area of the throttle orifice (821) of multiple described second partition (82) reduces gradually along described flow of refrigerant direction.
16. heat exchangers according to claim 9, it is characterized in that, described heat exchanger also comprises wireway (90), described wireway (90) is arranged on the outside of described upper header (20), the import of described wireway (90) is communicated with the air guide channel (62) of described gas-liquid separation pipe (60), and the outlet of described wireway (90) is communicated with described refrigerant outlet (50).
17. heat exchangers according to claim 9, it is characterized in that, described gas-liquid separation pipe (60) is positioned between two described heat exchanger tubes (10) of arbitrary neighborhood, the import of described gas-liquid separation pipe (60) is communicated with described upper header (20), and the outlet of described gas-liquid separation pipe (60) is communicated with described lower header (30).
18. heat exchangers according to claim 9, it is characterized in that, described gas-liquid separation pipe (60) is positioned at described refrigerant inlet (40) place of described heat exchanger, the import of described gas-liquid separation pipe (60) is communicated with the end of described upper header (20) or the import of described gas-liquid separation pipe (60) forms described refrigerant inlet (40), the outlet of described gas-liquid separation pipe (60) is communicated with described lower header (30), the described cold-producing medium admission passage (61) of described gas-liquid separation pipe (60) is communicated with described refrigerant inlet (40), the air guide channel (62) of described gas-liquid separation pipe (60) is communicated with described refrigerant outlet (50).
19. heat exchangers according to claim 17 or 18, it is characterized in that, described heat exchanger also comprises the 3rd dividing plate (83), described 3rd dividing plate (83) is arranged in described upper header (20) also to be separated described upper header (20), described gas-liquid separation pipe (60) also comprises the first dividing plate (81), described first dividing plate (81) extends downward in described main paragraph, described main paragraph is separated to form described cold-producing medium admission passage (61) and described air guide channel (62) by described first dividing plate (81), described 3rd dividing plate (83) is corresponding with first dividing plate (81) of described gas-liquid separation pipe (60) to be connected.
20. heat exchangers according to claim 19, is characterized in that, described 3rd dividing plate (83) and described first dividing plate (81) are formed in one structure.
21. heat exchangers according to claim 17 or 18, is characterized in that, described area of passage change section (63) is positioned at the junction of described gas-liquid separation pipe (60) and described lower header (30).
22. heat exchangers according to claim 17, is characterized in that, the cross section of described gas-liquid separation pipe (60) is rectangular.
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| CN107166814A (en) * | 2017-06-06 | 2017-09-15 | 天津商业大学 | A kind of new micro-channel evaporator |
| CN109539634A (en) * | 2018-12-03 | 2019-03-29 | 珠海格力电器股份有限公司 | Micro-channel heat exchanger and air conditioner |
| CN111912283A (en) * | 2020-09-04 | 2020-11-10 | 浙江盾安热工科技有限公司 | Liquid separation structure and heat exchanger |
| CN113587252A (en) * | 2021-08-11 | 2021-11-02 | 哈尔滨工业大学（深圳） | Microchannel heat exchanger and air conditioner |
| WO2024179386A1 (en) * | 2023-02-28 | 2024-09-06 | 华为技术有限公司 | Heat exchanger, heat exchange system and terminal device |
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| CN105258411B (en) | 2018-02-13 |
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