CN105258411B - Gas-liquid separation pipe and heat exchanger for heat exchanger - Google Patents
Gas-liquid separation pipe and heat exchanger for heat exchanger Download PDFInfo
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- CN105258411B CN105258411B CN201510658769.7A CN201510658769A CN105258411B CN 105258411 B CN105258411 B CN 105258411B CN 201510658769 A CN201510658769 A CN 201510658769A CN 105258411 B CN105258411 B CN 105258411B
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Abstract
The invention provides a kind of gas-liquid separation pipe and heat exchanger for heat exchanger, wherein, gas-liquid separation pipe includes main paragraph and at least one section of area of passage change section (63), main paragraph is included positioned at the import at top and positioned at the outlet of bottom, the refrigerant that entrance is provided with phase separation enters passage (61) and air guide channel (62), area of passage change section (63) is located at the lower section of import, and the area of passage of area of passage change section (63) is less than the area of passage of main paragraph.The problem of gas-liquid two-phase state refrigerant distribution that technical scheme can be efficiently solved in heat exchanger of the prior art is uneven, and heat exchange property is bad.
Description
Technical field
The present invention relates to technical field of heat exchange, in particular to a kind of for the gas-liquid separation pipe of heat exchanger and heat exchange
Device.
Background technology
Within air-conditioning systems, refrigerant, in order to ensure heat exchange property, leads to by the state after expansion valve for gas-liquid two-phase
Often gas-liquid separator can be set before the import of heat exchanger, the refrigerant for making to enter heat exchanger is liquid phase state refrigerant.However,
In existing micro-channel heat exchanger, because space is larger in header, the liquid phase after external gas-liquid separator separates
Refrigerant can turn into the state of gas-liquid two-phase again, so that in header after the import of heat exchanger enters header
Gas-liquid two-phase state distribution of refrigerant is uneven, and it is uneven not only result in the heat exchange of whole heat exchanger, and reduces heat exchange property.
The content of the invention
It is existing to solve it is a primary object of the present invention to provide a kind of gas-liquid separation pipe and heat exchanger for heat exchanger
The problem of gas-liquid two-phase state refrigerant distribution in heat exchanger in technology is uneven, and heat exchange property is bad.
To achieve these goals, according to an aspect of the invention, there is provided a kind of gas-liquid separation for heat exchanger
Pipe, gas-liquid separation pipe includes main paragraph and at least one section of area of passage change section, main paragraph include the import and position positioned at top
In the outlet of bottom, the refrigerant that entrance is provided with phase separation enters passage and air guide channel, and area of passage change section is located at
The lower section of import, the area of passage of area of passage change section are less than the area of passage of main paragraph.
Further, the ratio of the area of passage of the area of passage of area of passage change section and 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 located at the middle and lower part of gas-liquid separation pipe.
Further, refrigerant enter passage and air guide channel be juxtaposed on main paragraph upper end and respectively with main paragraph
It is connected.
Further, gas-liquid separation pipe also includes first partition, and first partition is extended downward into main paragraph, first partition
Main paragraph is separated to form refrigerant and enters passage and air guide channel.
Further, gas-liquid separation pipe also includes at least one baffle plate being arranged in air guide channel, is provided with baffle plate
Sorting hole.
Further, gas-liquid separation pipe also includes coarse structure, and coarse structure is arranged to be changed positioned at area of passage
On the inner surface of the main paragraph of the top of section and/or on the inner surface of the upper end of area of passage change section.
According to another aspect of the present invention, there is provided a kind of heat exchanger, including multiple heat exchanger tubes, refrigerant inlet, refrigeration
Agent outlet, upper header and lower header, upper header are arranged on the top of heat exchanger tube and connected with heat exchanger tube, lower header
It is arranged on the lower section of heat exchanger tube and is connected with heat exchanger tube, heat exchanger also includes gas-liquid separation pipe, and gas-liquid separation pipe is above-mentioned gas
Liquid separating pipe.
Further, heat exchanger also includes second partition, and second partition is arranged in lower header.
Further, second partition is multiple that multiple second partitions are arranged at intervals along refrigerant flow direction, each second
There is throttle orifice, throttle orifice is located at the bottom of second partition on dividing plate.
Further, stomata is additionally provided with second partition, the area of stomata is more than the area of throttle orifice.
Further, the lower end of heat exchanger tube, which is inserted into lower header, forms inserting paragraph, and stomata is inserted positioned at adjacent two
Between entering section, and the position of stomata is higher than the lower port of heat exchanger tube.
Further, the distance between two adjacent second partitions gradually increase along refrigerant flow direction.
Further, the area of the throttle orifice of multiple second partitions is gradually reduced along refrigerant flow direction.
Further, heat exchanger also includes airway tube, and airway tube is arranged on the outside of header, the import of airway tube with
The air guide channel connection of gas-liquid separation pipe, the outlet of airway tube connects with refrigerant outlet.
Further, gas-liquid separation pipe is located between two heat exchanger tubes of arbitrary neighborhood, the import of gas-liquid separation pipe with it is upper
Header connects, and the outlet of gas-liquid separation pipe connects with lower header.
Further, gas-liquid separation pipe is located at the refrigerant inlet of heat exchanger, the import of gas-liquid separation pipe and upper afflux
The end connection or the import of gas-liquid separation pipe of pipe form refrigerant inlet, and outlet and the lower header of gas-liquid separation pipe connect
Logical, the refrigerant of gas-liquid separation pipe connects into passage with refrigerant inlet, and air guide channel and the refrigerant of gas-liquid separation pipe go out
Mouth connection.
Further, heat exchanger also includes the 3rd dividing plate, and the 3rd dividing plate is arranged in header and divides upper header
Separate, gas-liquid separation pipe also includes first partition, and first partition is extended downward into main paragraph, and first partition separates main paragraph
Form refrigerant and enter passage and air guide channel, the connection corresponding with the first partition of gas-liquid separation pipe of the 3rd dividing plate.
Further, the 3rd dividing plate and first partition are formed in one structure.
Further, area of passage change section is located at the junction of gas-liquid separation pipe and lower header.
Further, the cross section of gas-liquid separation pipe is rectangular.
Apply the technical scheme of the present invention, main paragraph and at least one section of area of passage change section, and area of passage are set
The area of passage for changing section is less than the area of passage of main paragraph.Meanwhile the entrance of main paragraph is provided with the refrigeration of phase separation
Agent enters passage and air guide channel.When carrying out gas-liquid separation using gas-liquid separation pipe, gas-liquid two-phase cold-producing medium passes through refrigerant
Entered into passage in gas-liquid separation pipe.Because the area of passage of area of passage change section is compared with the area of passage of main paragraph
Smaller, when gas-liquid two-phase cold-producing medium changes section by above-mentioned area of passage, flow velocity reduces, the gaseous refrigerant in refrigerant with
Liquid refrigerant is separated.The gaseous refrigerant and liquid refrigerant separated by gas-liquid separation pipe, which can enter, subsequently to be set
Standby to be operated, for example, liquid refrigerant is exchanged heat into heat exchanger tube, gaseous refrigerant is passed directly into compressor and carried out again
Utilize.Above-mentioned gas-liquid separation pipe isolates the gaseous refrigerant in gas-liquid two-phase state refrigerant, and liquid phase refrigerant participates in follow-up
Distribution and heat exchange, the problem of distribution of gas-liquid two-phase state refrigerant is uneven is not only solved, and improve the heat transfer effect of heat exchanger.
Brief description of the drawings
The Figure of description for forming the part of the application is used for providing a further understanding of the present invention, and of the invention shows
Meaning property embodiment and its illustrate be used for explain the present invention, do not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 shows the structural representation of the embodiment one of the heat exchanger according to the present invention；
Fig. 2 shows the schematic front view of Fig. 1 heat exchanger；
Fig. 3 shows the First partial enlarged drawing of Fig. 2 heat exchanger；
Fig. 4 shows the second partial enlarged drawing of Fig. 2 heat exchanger；
Fig. 5 shows the structural representation of the second partition of Fig. 1 heat exchanger；
Fig. 6 shows the first partition of Fig. 1 heat exchanger and the structural representation of the 3rd dividing plate；
Fig. 7 shows the structural representation of the embodiment two of the heat exchanger according to the present invention；
Fig. 8 shows the schematic front view of Fig. 7 heat exchanger；
Fig. 9 shows the First partial enlarged drawing of Fig. 8 heat exchanger；And
Figure 10 shows the second partial enlarged drawing of Fig. 8 heat exchanger.
Wherein, above-mentioned accompanying drawing marks including the following drawings：
10th, heat exchanger tube；20th, upper header；30th, lower header；40th, refrigerant inlet；50th, refrigerant outlet；60th, gas-liquid
Separating pipe；61st, refrigerant enters passage；62nd, air guide channel；63rd, area of passage change section；70th, baffle plate；81st, first partition；
82nd, second partition；821st, throttle orifice；822nd, stomata；83rd, the 3rd dividing plate；90th, airway tube.
Embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase
Mutually combination.Describe the present invention in detail below with reference to the accompanying drawings and 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 includes main paragraph and one section of area of passage change section 63.Wherein, main paragraph is included positioned at the import at top and positioned at bottom
Outlet.The refrigerant that entrance is provided with phase separation enters passage 61 and air guide channel 62.Area of passage change section 63 be located at into
The lower section of mouth.The area of passage of area of passage change section 63 is less than the area of passage of main paragraph.
Using the gas-liquid separation pipe of the present embodiment, main paragraph and one section of area of passage change section 63, and flow-passing surface are set
The area of passage of product change section 63 is less than the area of passage of main paragraph.Meanwhile the entrance of main paragraph is provided with phase separation
Refrigerant enters passage 61 and air guide channel 62.When carrying out gas-liquid separation using gas-liquid separation pipe, gas-liquid two-phase cold-producing medium is led to
Refrigerant is crossed to enter in gas-liquid separation pipe into passage 61.Due to the area of passage and main paragraph of area of passage change section 63
Area of passage is compared to smaller, and when gas-liquid two-phase cold-producing medium changes section 63 by above-mentioned area of passage, flow velocity reduces, in refrigerant
Gaseous refrigerant and liquid refrigerant be separated.The gaseous refrigerant and liquid refrigerant separated by gas-liquid separation pipe
It can be operated into follow-up equipment, for example, liquid refrigerant is exchanged heat into heat exchanger tube, gaseous refrigerant is passed directly into
Recycled to compressor.Above-mentioned gas-liquid separation pipe isolates the gaseous refrigerant in gas-liquid two-phase state refrigerant, liquid phase system
Cryogen participates in follow-up distribution and heat exchange, not only solves the problem of distribution of gas-liquid two-phase state refrigerant is uneven, and improve and change
The heat transfer effect of hot device.In the present embodiment, area of passage change section 63 is one section, and certainly, area of passage changes the number of section 63
Not limited to this is measured, in the other embodiment not shown in figure, 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, area of passage change section 63 area of passage with
The ratio of the area of passage of main paragraph is 0.4 to 0.8.The ratio of the area of passage of above-mentioned area of passage change section 63 and main paragraph
Scope can enable gas-liquid two-phase cold-producing medium to efficiently separate, and and can makes refrigerant keep relative circulation, avoids refrigerant mistake
Multiple pileup is at area of passage change section 63.
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, and the outer tube wall and inner tubal wall of the necking segment are in contraction-like, i.e. necking segment
The sectional area of 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 main paragraph inner tubal wall
Sectional area.Area of passage change section 63 is formed by above-mentioned necking segment, is so more easily fabricated.Certainly, area of passage becomes
Change the generation type not limited to this of section 63, in the other embodiment not shown in figure, area of passage change section 63 can also
Being formed by way of only changing the pipe thickness of 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 located at gas-liquid separation
The middle and lower part of pipe.Because area of passage change section 63 is located at the middle and lower part of gas-liquid separation pipe, it can thus make liquid refrigerant
Flow velocity into the larger subsequent structural in space (such as heat exchanger lower header) is relatively smaller, so as to alleviate liquid refrigerant
It is changed into the phenomenon of gas-liquid two-phase again in larger space, and then makes distribution of refrigerant more uniform.
As shown in Figures 2 and 3, in the gas-liquid separation pipe of the present embodiment, refrigerant enters passage 61 and air guide channel 62
It is juxtaposed on the upper end of main paragraph and is connected respectively with main paragraph.Gas-liquid separation pipe also includes first partition 81.First every
Plate 81 is extended downward into main paragraph, and main paragraph is separated to form refrigerant and enters passage 61 and air guide channel by first partition 81
62.When gas-liquid two-phase cold-producing medium, which enters refrigerant, to be entered in passage 61, hit with first partition 81, refrigerant velocities subtract
It is small, the area of passage change section 63 of gas-liquid separation pipe is hereafter passed through, the speed of refrigerant further declines, become in area of passage
Change and part accumulation is formed at section 63, gas-liquid two-phase separates, and gaseous refrigerant moves upwards, and is led by air guide channel 62
Go out.
As shown in Figures 2 and 3, in the gas-liquid separation pipe of the present embodiment, gas-liquid separation pipe also leads to including being arranged on air guide
Baffle plate 70 in road 62, sorting hole is provided with baffle plate 70.In the present embodiment, baffle plate 70 is two.Set on each baffle plate 70
Sorting hole is equipped with, so that air-flow further slows down, gaseous refrigerant is separated again, prevents gaseous refrigerant from carry
Liquid refrigerant together flows to follow-up equipment (such as compressor), influences the performance of compressor, and avoids liquid refrigerant
Being flowed out from air guide channel 62 reduces the utilization rate of liquid refrigerant.Further, since the area of passage change section 63 of gas-liquid separation pipe
Area of passage reduce, easily make refrigerant accumulation so as to causing liquid level to rise.When the liquid level rise in gas-liquid separation pipe
When to baffle plate 70, baffle plate 70 can apply certain resistance to it.Can so it avoid liquid refrigerant directly by leading
While gas passage 62 flows out, downward pressure can also be formed to the refrigerant in gas-liquid separation pipe, promotes more to freeze
Agent changes section 63 by area of passage, so as to reduce refrigerant level.It should be noted that the quantity not limited to this of baffle plate 70,
In other embodiment not shown in figure, baffle plate 70 can also be one.
In the gas-liquid separation pipe of the present embodiment, gas-liquid separation pipe also includes coarse structure (not shown).Coarse knot
Structure is arranged on the inner surface of the upper end of area of passage change section 63.The coarse structure can be irregular rough surface,
It can be the regular rough surface by processing the formation such as screw thread or annular knurl line.Said structure can further be reduced and flowed into
The flow velocity of the refrigerant of flow area change section 63, so as to improve gas-liquid separation effect.Certainly, the set location of coarse structure is unlimited
In this, in other embodiments, the inner surface of the main paragraph of the top of area of passage change section 63 can also be arranged in
On, or be arranged on the inner surface of area of passage change section 63, it can also so play a part of reducing refrigerant flow rates.
As shown in Figure 1 to Figure 3, present invention also provides a kind of heat exchanger.According to the embodiment one of the heat exchanger of the application
Including multiple heat exchanger tubes 10, refrigerant inlet 40, refrigerant outlet 50, upper header 20 and lower header 30.Wherein, upper collection
Flow tube 20 is arranged on the top of heat exchanger tube 10 and connected with heat exchanger tube 10.Lower header 30 be arranged on the lower section of heat exchanger tube 10 and with
Heat exchanger tube 10 connects.Fin is provided between multiple heat exchanger tubes 10.Heat exchanger also includes gas-liquid separation pipe 60.Gas-liquid separation pipe 60
For above-mentioned gas-liquid separation pipe.In the present embodiment, gas-liquid separation pipe 60 is located between two heat exchanger tubes 10 of arbitrary neighborhood.Gas
The import of liquid separating pipe 60 connects with upper header 20, and the outlet of gas-liquid separation pipe 60 connects with lower header 30.That is embodiment
One heat exchanger is double loop micro-channel heat exchanger.The double loop micro-channel heat exchanger is divided into two loops.Gas-liquid separation pipe 60
It is arranged between two loops.
As shown in Figure 1 to Figure 3, in the heat exchanger of embodiment one, be located at arbitrary neighborhood two of gas-liquid separation pipe 60 change
Between heat pipe 10, the import of refrigerant into the passage 61 of gas-liquid separation pipe 60 connects with upper header 20.Gas-liquid separation pipe 60
The outlet of air guide channel 62 connected with refrigerant outlet 50.The outlet of gas-liquid separation pipe 60 connects with lower header 30.When changing
When hot device is exchanged heat, after gas-liquid two-phase cold-producing medium enters lower header 30 by refrigerant inlet 40, rise through and be located at
The heat exchanger tube 10 of the side of gas-liquid separation pipe 60 first is once exchanged heat, and the refrigerant after exchanging heat reaches upper header 20 (first
Loop).Generally, the quantity of the above-mentioned heat exchanger tube 10 positioned at the side of gas-liquid separation pipe 60 first is oppositely arranged few, this
Sample can avoids gaseous refrigerant agent content in refrigerant after once exchanging heat too high.After once exchanging heat, gas
Liquid two phase refrigerant carries out gas-liquid separation by the gas-liquid separation pipe 60 being vertically arranged, and the gaseous refrigerant separated is by leading
Gas passage 62 flow to refrigerant outlet 50, and is recycled into compressor, and the liquid refrigerant separated flows into next part
Flow tube 30 simultaneously carries out secondary heat exchange by the heat exchanger tube 10 positioned at the side of gas-liquid separation pipe 60 second, and the refrigerant after exchanging heat reaches
Upper header 20, and recycled (second servo loop) into compressor.Two in arbitrary neighborhood of the heat exchanger of the present embodiment
Gas-liquid separation pipe 60 is set between heat exchanger tube 10, can be below the heat exchanger tube 10 for entering the side of gas-liquid separation pipe 60 second under
Refrigerant in header 30 carries out gas-liquid separation, so as to reduce the flow of the gaseous refrigerant in lower header 30, makes next part
Distribution of refrigerant in flow tube 30 is more uniform, so as to improve the heat exchange property of heat exchanger.Meanwhile divide by gas-liquid separation pipe 60
Separating out the gaseous refrigerant come can be passed through to refrigerant outlet 50, and flow to compressor and recycled, and improve refrigerant
Utilization rate.
It should be noted that the heat exchanger of the present embodiment is double loop micro-channel heat exchanger, and certainly, the specific knot of heat exchanger
Structure not limited to this, in the other embodiment not shown in figure, heat exchanger can be other kinds of heat exchange structure, for example,
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 second
Between loop and tertiary circuit.
In the prior art, in order that the distribution of refrigerant in the header of micro-channel heat exchanger is more uniform, it will usually
Distribution pipe, distribution plate or other distribution structures are set, carry out the distribution of two phase flow.But if the heat exchanger is multipaths
When, the structure of internal distribution can not just be realized by single distribution pipe or plate, and manufacturing processing technic is difficult.
As shown in Figure 4 and Figure 5, in the heat exchanger of embodiment one, heat exchanger also includes second partition 82.Second partition 82
It is arranged in lower header 30.Second partition 82 is multiple, and multiple second partitions 82 are arranged at intervals along refrigerant flow direction, often
There is throttle orifice 821, throttle orifice 821 is located at the bottom of second partition 82 on individual second partition 82.When under liquid refrigerant inflow
During header 30, due to the effect of inertia, liquid refrigerant is easily deposited in the distal end of lower header 30, and (lower header 30 is remote
One end of gas-liquid separation pipe 60).Multiple intervals are set to set in order to avoid above-mentioned phenomenon occurs, in the lower header 30 of the present embodiment
The second partition 82 put.Lower header 30 is divided into some compartments by above-mentioned second partition 82, liquid refrigerant by second every
Throttle orifice 821 on plate 82 circulates between each compartment.Said structure can reduce the flow velocity of liquid refrigerant, prevent liquid
Refrigerant is directly stacked into the distal end of lower header 30, makes distribution of refrigerant more uniform, so that refrigerant is more uniformly
Enter in heat exchanger tube 10.Meanwhile above-mentioned second partition 82 is simple in construction, easily fabricated and versatile.In the present embodiment
In, throttle orifice 821 is one, certainly, the quantity not limited to this of throttle orifice 821, in the other embodiment not shown in figure,
Throttle orifice 821 can be multiple.
As shown in Figure 4 and Figure 5, in the heat exchanger of embodiment one, stomata 822, stomata are additionally provided with second partition 82
822 area is more than the area of throttle orifice 821.Some gases can be remained in liquid refrigerant in lower header 30 unavoidably.By
Fast typically than liquid in the flow velocity of gas, in order to avoid liquid refrigerant is deposited in the distal end of lower header 30, gas is stored in
The near-end (lower header 30 is close to one end of gas-liquid separation pipe 60) of lower header 30, the stomata 822 of the present embodiment is arranged to
The macropore of irregular shape, the aperture that throttle orifice 821 is provided in round.The gas remained in liquid refrigerant can be by above-mentioned
Stomata 822 circulates between each compartment, distributes the gas-liquid two-phase state refrigerant in lower header 30 more uniform.
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 into lower header 30
Form inserting paragraph.Stomata 822 is between two adjacent inserting paragraphs, and the position of stomata 822 is higher than the lower end of heat exchanger tube 10
Mouthful.Said structure can avoid gas from flowing directly into heat exchanger tube 10 while being easy to liquid refrigerant to flow into heat exchanger tube 10.This
Outside, when the liquid level of liquid refrigerant is higher than 822 place plane of stomata, liquid refrigerant can also be spilt into from the stomata 822
Next compartment.Said structure makes the refrigerant of each compartment of lower header 30 relatively uniform, avoids gaseous refrigerant heap
At one end, liquid refrigerant is deposited in the situation of the other end to product, makes gas-liquid two-phase cold-producing medium distribution evenly.
As shown in Figure 4 and Figure 5, in the heat exchanger of embodiment one, the distance between adjacent two second partitions 82 edge
Refrigerant flow direction gradually increases.Said structure makes the space of the compartment of the near-end of lower header 30 be less than lower header 30
The space of the compartment of distal end, so gas and liquid refrigerant can be made to squeeze mutually, be more beneficial for gas being discharged to below
In compartment.Meanwhile said structure can ensure the amount of the liquid refrigerant of the near-end of lower header 30, make it have certain liquid
Height, to realize that liquid refrigerant is completed subsequently to exchange heat into heat exchanger tube 10.Certainly, the set-up mode of second partition 82 is unlimited
In this, in the other embodiment not shown in figure, multiple second partitions 82 can also be uniformly distributed.
As shown in figure 4, in the heat exchanger of embodiment one, the area edge refrigeration of the throttle orifice 821 of multiple second partitions 82
Agent flow direction is gradually reduced.Because the liquid refrigerant 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 opening of the throttle orifice 821 of the second partition 82 of the near-end of lower header 30
Area is more than the aperture area of the throttle orifice 821 of the second partition 82 of the distal end of lower header 30, can so realize further
The effect of throttling liquid separation, and it is easy to more cold-producing medium streams to the back-end, so that distribution of refrigerant is more uniform.
As depicted in figs. 1 and 2, in the heat exchanger of embodiment one, heat exchanger also includes airway tube 90.Airway tube 90 is set
In the outside of upper header 20.The import of airway tube 90 connects with the air guide channel 62 of gas-liquid separation pipe 60.Airway tube 90 goes out
Mouth connects with refrigerant outlet 50.The gaseous refrigerant that said structure can make to separate by gas-liquid separation pipe 60 directly leads to
Cross air guide channel 62 and airway tube 90 is passed through to refrigerant outlet 50, and recycled into compressor, so can be by one
Caused gas separation in secondary heat exchange, and heat exchanger is expelled directly out, only allow most of liquid refrigerant to enter the second heat transfer zone
Domain, heat exchange is evaporated, can so produce heat transfer effect evenly, is obviously improved the performance of unit；Twice evaporation produces
Gas mixed after enter compressor.In the present embodiment, valve is provided with airway tube 90, the valve can be according to need
Control the flow of gas in airway tube 90.
As shown in Fig. 2, Fig. 3 and Fig. 6, in the heat exchanger of embodiment one, heat exchanger also includes the 3rd dividing plate 83.3rd
Dividing plate 83 is arranged in header 20 and separates upper header 20.The first of 3rd dividing plate 83 and gas-liquid separation pipe 60 every
Plate 81 is corresponding to be connected.In the present embodiment, the 3rd dividing plate 83 is removably connected with first partition 81 by modes such as grafting, rivetings
Connect.When needing to pull down gas-liquid separation pipe 60 from upper header 20, the 3rd dividing plate 83 can separate with first partition 81
Come.When needing gas-liquid separation pipe 60 being arranged on upper header 20, the 3rd dividing plate 83 can be connected again with first partition 81
Together, so make operation more convenient.Certainly, the 3rd dividing plate 83 and the set-up mode not limited to this of first partition 81, at it
In his embodiment, the 3rd dividing plate 83 and first partition 81 can also 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 located at gas-liquid separation pipe 60
Middle and lower part.Liquid refrigerant enters lower header 30 after above-mentioned area of passage changes in section 63 and slowed down.Due to flow-passing surface
Product change section 63 is located at the middle and lower part of gas-liquid separation pipe 60, the flow velocity that can be thus entered with liquid refrigerant after lower header 30
It is relatively smaller, it is changed into the phenomenon of gas-liquid two-phase again so as to alleviate liquid refrigerant in the larger lower header 30 in space,
And then make distribution of refrigerant more uniform, improve heat exchange property.Certainly, the set location of area of passage change section 63 is not limited to
This, in the other embodiment not shown in figure, area of passage change section 63 can be located at gas-liquid separation pipe 60 and lower header
The junction of pipe 30, it can so make to be directly entered lower header 30 after above-mentioned area of passage changes in section 63 and slowed down, enter
One step makes distribution of refrigerant uniform.
In the heat exchanger of embodiment one, the cross section of gas-liquid separation pipe 60 is rectangular, the width of its width and heat exchanger tube 10
Spend it is identical, be so easy between gas-liquid separation pipe 60 and adjacent heat exchanger tube 10 set fin be used for exchange heat, make full use of space,
Improve heat exchange efficiency.As shown in fig. 6, the shape of the 3rd dividing plate 83 is adapted with the shape of upper header 20, it is rounded.First every
The shape of plate 81 is adapted with the shape of gas-liquid separation pipe 60, 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
At the refrigerant inlet 40 of heat exchanger.The import of gas-liquid separation pipe 60 connects with the end of upper header 20.Gas-liquid separation
The outlet of pipe 60 connects with lower header 30, and the refrigerant of gas-liquid separation pipe 60 enters end of the passage 61 by upper header 20
Connected with refrigerant inlet 40, the end and refrigerant outlet 50 of the air guide channel 62 of gas-liquid separation pipe 60 by upper header 20
Connection.I.e. the heat exchanger of embodiment two is single loop micro-channel heat exchanger.Gas-liquid at the refrigerant inlet 40 of heat exchanger
Separating pipe 60, its upper and lower side connect with the end of upper header 20 and lower header 30, installed in upper header 20 and lower header
Between pipe 30, make overall structure compacter.
As shown in Figure 7 to 10, in the heat exchanger of embodiment two, the refrigerant that gas-liquid separation pipe 60 is located at heat exchanger enters
At mouth 40.The refrigerant of gas-liquid separation pipe 60 is connected into passage 61 with refrigerant inlet 40, and the air guide of gas-liquid separation pipe 60 is led to
Road 62 connects with refrigerant outlet 50, and the outlet of gas-liquid separation pipe 60 connects with lower header 30.When heat exchanger is exchanged heat,
Gas-liquid two-phase cold-producing medium is entered in gas-liquid separation pipe 60 by refrigerant inlet 40, refrigerant into passage 61, and by perpendicular
The gas-liquid separation pipe 60 directly set carries out gas-liquid separation.The liquid refrigerant separated by gas-liquid separation pipe 60 flows directly into
Lower header 30, then rise through heat exchanger tube 10 and exchanged heat, the liquid refrigerant after heat exchange is changed into gaseous state and arrived
Up in upper header 20, hereafter, it is changed into gaseous refrigerant and is passed through to compressor by refrigerant outlet 50 again to be recycled.
In addition, refrigerant is flowed to by air guide channel 62 and airway tube 90 by the gaseous refrigerant that gas-liquid separation pipe 60 is separated
Outlet 50, and be passed through to compressor and recycled.The heat exchanger of the present embodiment is set at the refrigerant inlet 40 of heat exchanger
Gas-liquid separation pipe 60 is put, gas-liquid separation can be carried out to entering the refrigerant in lower header 30, so as to reduce lower header
The flow of gaseous refrigerant in 30, make the distribution of refrigerant in lower header 30 more uniform, so as to improve changing for heat exchanger
Hot property.Meanwhile the gaseous refrigerant separated by gas-liquid separation pipe 60 can be passed through to refrigerant outlet 50, and it flow to
Compressor is recycled, and improves the utilization rate of refrigerant.The other structures and operation principle of the heat exchanger of the present embodiment with
Embodiment one it is essentially identical, will not be repeated here.
The heat exchanger of embodiment three and the main distinction of embodiment two are that the import of gas-liquid separation pipe 60 forms refrigerant
The (not shown) of entrance 40.In the present embodiment, the import of the refrigerant of gas-liquid separation pipe 60 into passage 61 is formed above-mentioned
Refrigerant inlet 40.When heat exchanger is exchanged heat, gas-liquid two-phase cold-producing medium directly enters the import of passage 61 by refrigerant
Enter in gas-liquid separation pipe 60.The other structures and operation principle of the heat exchanger of the present embodiment and the basic phase of embodiment two
Together, will not be repeated here.
As can be seen from the above description, the above embodiments of the present invention realize following technique effect：
In single loop heat exchanger, gas-liquid separation pipe can be set directly at the refrigerant inlet of heat exchanger or gas
The import of liquid separating pipe forms refrigerant inlet, and in Multi-circuit heat exchanger, gas-liquid separation pipe can be arranged on to loop with returning
Between road.Gas-liquid two-phase cold-producing medium is separated by gas-liquid separation pipe, and the gaseous refrigerant separated directly passes through air guide
Pipe flows to refrigerant outlet, and is passed through compressor and is recycled, and the liquid refrigerant separated enters in lower header, so
Afterwards by second partition, it is uniformly distributed in every heat exchanger tube.Especially, in Multi-circuit heat exchanger, gas-liquid separation pipe can
To carry out gas-liquid separation to gas-liquid two-phase cold-producing medium between two loops, the refrigerant to be exchanged heat by upper level loop is isolated
In gaseous refrigerant, so as to improve overall heat exchange performance.In addition, gas-liquid separation pipe, which is vertically arranged, can make overall structure more
It is compact.The structure and set location of second partition make liquid separation more uniform, and simple in construction, easy to process.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (22)
1. a kind of gas-liquid separation pipe for heat exchanger, it is characterised in that the gas-liquid separation pipe includes main paragraph and at least one
Section area of passage change section (63), the main paragraph are included positioned at the import at top and positioned at the outlet of bottom, the entrance
The refrigerant for being provided with phase separation enters passage (61) and air guide channel (62), and the area of passage change section (63) is positioned at described
The lower section of import, the area of passage of the area of passage change section (63) are less than the area of passage of the main paragraph.
2. gas-liquid separation pipe according to claim 1, it is characterised in that the flow-passing surface of the area of passage change section (63)
The ratio of product and the area of passage of the main paragraph is 0.4 to 0.8.
3. gas-liquid separation pipe according to claim 1, it is characterised in that the area of passage change section (63) is by necking segment
Formed.
4. gas-liquid separation pipe according to any one of claim 1 to 3, it is characterised in that the area of passage changes section
(63) it is located at the middle and lower part of the gas-liquid separation pipe.
5. gas-liquid separation pipe according to claim 1, it is characterised in that the refrigerant enters passage (61) and described led
Gas passage (62) is juxtaposed on the upper end of the main paragraph and is connected respectively with the main paragraph.
6. gas-liquid separation pipe according to claim 5, it is characterised in that the gas-liquid separation pipe also includes first partition
(81), the first partition (81) is extended downward into the main paragraph, and the first partition (81) separates the main paragraph
Form the refrigerant and enter passage (61) and the air guide channel (62).
7. gas-liquid separation pipe according to claim 5, it is characterised in that the gas-liquid separation pipe is also described including being arranged on
At least one baffle plate (70) in air guide channel (62), sorting hole is provided with the baffle plate (70).
8. gas-liquid separation pipe according to any one of claim 1 to 3, it is characterised in that the gas-liquid separation pipe also wraps
Coarse structure is included, the coarse structure is arranged at the main paragraph positioned at the top of area of passage change section (63)
Inner surface on and/or the area of passage change section (63) upper end inner surface on.
9. a kind of heat exchanger, including multiple heat exchanger tubes (10), refrigerant inlet (40), refrigerant outlet (50), upper header
(20) and lower header (30), the upper header (20) be arranged on the top of the heat exchanger tube (10) and with the heat exchanger tube
(10) connecting, the lower header (30) is arranged on the lower section of the heat exchanger tube (10) and connected with the heat exchanger tube (10), its
It is characterised by, the heat exchanger also includes gas-liquid separation pipe (60), and the gas-liquid separation pipe (60) is to appoint in claim 1 to 8
Gas-liquid separation pipe described in one.
10. heat exchanger according to claim 9, it is characterised in that the heat exchanger also includes second partition (82), described
Second partition (82) is arranged in the lower header (30).
11. heat exchanger according to claim 10, it is characterised in that the second partition (82) is multiple described to be multiple
Second partition (82) is arranged at intervals along refrigerant flow direction, has throttle orifice (821), institute on each second partition (82)
State the bottom that throttle orifice (821) is located at the second partition (82).
12. heat exchanger according to claim 11, it is characterised in that be additionally provided with stomata on the second partition (82)
(822), the area of the stomata (822) is more than the area of the throttle orifice (821).
13. heat exchanger according to claim 12, it is characterised in that the lower end of the heat exchanger tube (10) be inserted into it is described under
Inserting paragraph is formed in header (30), the stomata (822) is between two adjacent inserting paragraphs, and the stomata
(822) position is higher than the lower port of the heat exchanger tube (10).
14. heat exchanger according to claim 11, it is characterised in that between two adjacent second partitions (82)
Distance gradually increases along the refrigerant flow direction.
15. heat exchanger according to claim 11, it is characterised in that the throttle orifice of multiple second partitions (82)
(821) area is gradually reduced along the refrigerant flow direction.
16. heat exchanger according to claim 9, it is characterised in that the heat exchanger also includes airway tube (90), described to lead
Tracheae (90) is arranged on the outside of the upper header (20), the import of the airway tube (90) and the gas-liquid separation pipe (60)
Air guide channel (62) connection, the outlet of the airway tube (90) connects with the refrigerant outlet (50).
17. heat exchanger according to claim 9, it is characterised in that the gas-liquid separation pipe (60) is located at arbitrary neighborhood
Between two heat exchanger tubes (10), the import of the gas-liquid separation pipe (60) connects with the upper header (20), the gas
The outlet of liquid separating pipe (60) connects with the lower header (30).
18. heat exchanger according to claim 9, it is characterised in that the gas-liquid separation pipe (60) is located at the heat exchanger
The refrigerant inlet (40) place, the import of the gas-liquid separation pipe (60) connected with the end of the upper header (20) or
The import of gas-liquid separation pipe (60) described in person forms the refrigerant inlet (40), the outlet of the gas-liquid separation pipe (60) and institute
Lower header (30) connection is stated, the refrigerant of the gas-liquid separation pipe (60) enters passage (61) and the refrigerant inlet
(40) connect, the air guide channel (62) of the gas-liquid separation pipe (60) connects with the refrigerant outlet (50).
19. the heat exchanger according to claim 17 or 18, it is characterised in that the heat exchanger also includes the 3rd dividing plate
(83), the 3rd dividing plate (83) is arranged in the upper header (20) and separates the upper header (20), described
Gas-liquid separation pipe (60) also includes first partition (81), and the first partition (81) is extended downward into the main paragraph, described
The main paragraph is separated to form the refrigerant and enters passage (61) and the air guide channel (62) by first partition (81), described
The connection corresponding with the first partition (81) of the gas-liquid separation pipe (60) of 3rd dividing plate (83).
20. heat exchanger according to claim 19, it is characterised in that the 3rd dividing plate (83) and the first partition
(81) be formed in one structure.
21. the heat exchanger according to claim 17 or 18, it is characterised in that the area of passage change section (63) is located at institute
State the junction of gas-liquid separation pipe (60) and the lower header (30).
22. heat exchanger according to claim 17, it is characterised in that the cross section of the gas-liquid separation pipe (60) is in square
Shape.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510658769.7A CN105258411B (en) | 2015-10-12 | 2015-10-12 | Gas-liquid separation pipe and heat exchanger for heat exchanger |
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|---|---|---|---|
| CN201510658769.7A CN105258411B (en) | 2015-10-12 | 2015-10-12 | Gas-liquid separation pipe and heat exchanger for heat exchanger |
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| CN105258411A CN105258411A (en) | 2016-01-20 |
| CN105258411B true CN105258411B (en) | 2018-02-13 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107166814A (en) * | 2017-06-06 | 2017-09-15 | 天津商业大学 | A kind of new micro-channel evaporator |
| CN109539634B (en) * | 2018-12-03 | 2020-04-28 | 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 |
| CN113587252B (en) * | 2021-08-11 | 2022-09-13 | 哈尔滨工业大学（深圳） | Microchannel heat exchanger and air conditioner |
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| JPH06117728A (en) * | 1992-10-01 | 1994-04-28 | Daikin Ind Ltd | Vapor-liquid separation type heat exchanger |
| JPH085195A (en) * | 1994-06-23 | 1996-01-12 | Sharp Corp | Heat exchanger |
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|---|---|
| CN105258411A (en) | 2016-01-20 |
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