CN209415844U - Double-flow micro-channel evaporator with double liquid supply pipes and air guide tubule - Google Patents
Double-flow micro-channel evaporator with double liquid supply pipes and air guide tubule Download PDFInfo
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- CN209415844U CN209415844U CN201822020450.3U CN201822020450U CN209415844U CN 209415844 U CN209415844 U CN 209415844U CN 201822020450 U CN201822020450 U CN 201822020450U CN 209415844 U CN209415844 U CN 209415844U
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- inlet header
- flat tube
- channel evaporator
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Abstract
The utility model discloses the double-flow micro-channel evaporators with double liquid supply pipes and air guide tubule, including the spaced confluence collector in left and right and main collector；The confluence collector side opposite with main collector is connected by the flat tube of more cross direction profiles；It is provided with point journey baffle of cross direction profiles in the main collector, is divided to journey baffle that the main collector is divided into two cavitys of inlet header and outlet header；Liquid separation baffle is provided in inlet header, the inlet header is divided into two cavitys of upper plenum and lower cavity by liquid separation baffle；The upper plenum of inlet header is connected with upper liquid supply pipe, and the lower cavity of the inlet header is connected with lower liquid supply pipe；The right upper portion of outlet header is connected by check valve with exhaust pipe；The top of confluence collector is connected by air guide tubule with exhaust pipe.The problem of gas liquid two-phase flow interferes with each other in microchannel can be effectively relieved in the utility model, improve the heat transfer effect of micro-channel evaporator, guarantee the heat exchange property of micro-channel evaporator.
Description
Technical field
The utility model relates to vaporizer technology fields, more particularly to the double-flow with double liquid supply pipes and air guide tubule
Micro-channel evaporator.
Background technique
Currently, the evaporator in refrigeration system is mostly the classes such as bushing type evaporator, shell-and-tube evaporator, finned evaporator
There are the disadvantages such as refrigerant charge is big, processing consumable quantity is big, heat exchange efficiency is low in type, the evaporator of these types.
And obviously compared with this formation, micro-channel heat exchanger is widely used as condenser, has synthesis
The advantages that at low cost, energy-efficient, therefore expanded in recent years it is applied to air conditioner refrigerating field.
But for the micro-channel evaporator in refrigeration system, gas liquid two-phase flow phase in the microchannel that has
Mutually interference, wherein the refrigerant of gasification tends to interfere with liquid refrigerant flowing, to be easy to influence the heat exchange of micro-channel evaporator
Effect causes the heat exchange property of micro-channel evaporator unstable, and then affects the refrigeration performance and stabilization of entire refrigeration system
Property.
In addition, micro-channel evaporator there are feed flows uneven, refrigerant is since gravity is gathered in inlet header lower part
And the technical issues of lower part flat tube, even results in micro-channel heat exchanger and exists as evaporator to seriously affect heat transfer effect
When work, there are problems that performance sharply declines.
Therefore, there is an urgent need to develop a kind of micro-channel heat exchangers out at present, can effectively improve refrigerant in entrance collection
Distributing uniformity in pipe improves the situation that refrigerant is gathered in inlet header lower part and corresponding lower part flat tube, improves micro- logical
The heat transfer effect of road evaporator.
Utility model content
In view of this, the purpose of this utility model for existing double-flow micro-channel evaporator feed flow uneven, refrigerant
Micro-channel evaporator is influenced since gravity is gathered in gas liquid two-phase flow in inlet header lower part and lower part flat tube, microchannel
Heat transfer effect, especially gas flow is larger in second procedure, seriously reduces the technology of the effective heat exchange area of second procedure
Problem, and the double-flow micro-channel evaporator with double liquid supply pipes and air guide tubule is provided, liquid refrigerant feed flow can be improved
Uniformity, while inlet header overhead refrigerant flow velocity and flow can be improved, and then improve micro-channel evaporator first pass
Each flat tube liquid refrigerant flow velocity, flow and uniformity, while liquid enters in the microchannel of second procedure flat tube, can increase
Second procedure inner refrigerant flow improves feed flow uniformity in refrigerant second procedure, makes full use of the of micro-channel evaporator
The heat exchange area of two processes makes full use of the heat exchange area of micro-channel evaporator, enhancing heat exchange, to improve micro-channel evaporator
Heat exchange efficiency guarantees the heat exchange property of micro-channel evaporator, is conducive to widely apply, be of great practical significance.
For this purpose, the utility model provides the double-flow micro-channel evaporator with double liquid supply pipes and air guide tubule, it is special
Sign is, spaced including left and right, hollow confluence collector and main collector；
The confluence collector side opposite with main collector is connected by the flat tube of more cross direction profiles；
Point journey baffle of cross direction profiles is provided in the main collector, the main collector is divided into entrance by described point of journey baffle
Two cavitys of collector and outlet header, the inlet header are located at the lower section of outlet header；
The liquid separation baffle of cross direction profiles is provided in the inlet header, the inlet header is divided by the liquid separation baffle
Two cavitys of upper plenum and lower cavity；
The upper plenum of the inlet header is connected with upper liquid supply pipe, the lower cavity of the inlet header and lower liquid supply pipe phase
Connection；
The right upper portion of the outlet header is connected by a check valve with an exhaust pipe；
The top of the confluence collector is connected by an air guide tubule with the exhaust pipe.
Wherein, the confluence collector and main collector are vertically arranged and are parallel to each other.
Wherein, the flat tube is flat tube, has a plurality of microchannel in the flat tube.
Wherein, multiple fins are distributed in the two sides up and down of every flat tube respectively.
Wherein, the air guide tubule is located at the surface of confluence collector.
Wherein, the height of the inlet header is less than the height of outlet header.
Wherein, the volume of the outlet header is greater than the volume of inlet header.
Wherein, highly it is higher than the quantity for dividing the flat tube of journey baffle, the quantity less than height lower than the flat tube for dividing journey baffle.
By the above technical solution provided by the utility model as it can be seen that compared with prior art, the utility model provides
Double-flow micro-channel evaporator with double liquid supply pipes and air guide tubule, may be implemented in micro-channel evaporator in second procedure
Gas-liquid separation, gas enters air guide tubule, and liquid enters second procedure flat tube, can thus increase refrigeration in second procedure
Agent flux makes full use of changing for the second procedure of micro-channel evaporator to improve feed flow uniformity in refrigerant second procedure
Therefore heat area can be effectively relieved the problem of gas liquid two-phase flow interferes with each other in microchannel, improve micro-channel evaporator
Heat transfer effect guarantees the heat exchange property of micro-channel evaporator, is conducive to widely apply, be of great practical significance.
In addition, inlet header refrigerant feed liquid uniformity can be improved in the utility model, inlet header top refrigeration is improved
Agent flow velocity and flow, and then improve the flow velocity of all flat tube inner refrigerants of first pass in micro-channel evaporator, flow and uniformly
Property, improve micro-channel evaporator heat transfer effect.
Detailed description of the invention
Fig. 1 is the structure of the double-flow micro-channel evaporator with double liquid supply pipes and air guide tubule provided by the utility model
Schematic diagram；
In figure, 1 is lower liquid supply pipe, and 2 be upper liquid supply pipe, and 3 be inlet header, and 4 be flat tube, and 5 be fin；
6 be confluence collector, and 7 be air guide tubule, and 8 be outlet header, and 9 is divide journey baffle, and 10 be liquid separation baffle；
11 be check valve, and 12 be exhaust pipe, and 13 be main collector.
Specific embodiment
In order to make those skilled in the art better understand the scheme of the utility model, with reference to the accompanying drawing and embodiment
The utility model is described in further detail.
Referring to Fig. 1, the utility model provides the double-flow micro-channel evaporator with double liquid supply pipes and air guide tubule, packet
Include the confluence collector 6 and main collector 13 that left and right is spaced, hollow；
The confluence collector 6 side opposite with main collector 13 is connected by the flat tube 4 of more cross direction profiles；
Point journey baffle 9 of cross direction profiles is provided in the main collector 13, described point of journey baffle 9 divides the main collector 13
At 8 two cavitys of inlet header 3 and outlet header, the inlet header 3 is located at the lower section of outlet header 8；
It should be noted that by dividing journey baffle 9, so that the inlet header 3 and outlet header 8 are mutually isolated, complete
It is spaced apart.
It is provided with the liquid separation baffle 10 of cross direction profiles in the inlet header 3, the liquid separation baffle 10 is by the entrance collection
Pipe 3 is divided into two cavitys of upper plenum and lower cavity；
The right upper portion of the inlet header 3 is connected with upper liquid supply pipe 2, and the lower right side of the inlet header 3 is under
Liquid supply pipe 1 is connected；
The upper liquid supply pipe 2 is connected with the upper plenum of the inlet header 3, the lower liquid supply pipe 1 and the entrance collection
The lower cavity of pipe 3 is connected；
The right upper portion of the outlet header 8 is connected by a check valve 11 with an exhaust pipe 12；By unidirectional
The setting of valve 11, it is ensured that the one-way flow of gas (i.e. gaseous working medium) avoids flowing back.
The top of the confluence collector 6 is connected by an air guide tubule 7 with the exhaust pipe 12.
It should be noted that air guide tubule is arranged on confluence collector, second may be implemented for the utility model
Gas-liquid separation in journey, gas enter air guide tubule, and liquid enters second procedure flat tube, while can increase system in second procedure
Cryogen flow improves feed flow uniformity in refrigerant second procedure, makes full use of the heat exchange of the second procedure of micro-channel evaporator
Area, so that heat exchange enhancing, so that micro-channel heat exchanger heat exchange property improves.
In addition, by the way that liquid separation baffle is arranged in inlet header, inlet header is divided into up and down for the utility model
Two cavitys, working medium flows into two cavitys up and down of the inlet header from lower liquid supply pipe and upper liquid supply pipe simultaneously, so as to cut
Influence of the weak gravity for refrigerant improves refrigerant and is gathered in inlet header lower part and corresponds to more flat tubes of lower position
Situation further improves the system of entire inlet header so that the overhead refrigerant flow velocity and flow of inlet header dramatically increase
The uniformity of refrigerant distribution, meanwhile, the increase of flow velocity, so that heat exchange enhancing, so that the heat exchange of entire micro-channel heat exchanger
Performance significantly improves.
In the present invention, in specific implementation, the confluence collector 6 and main collector 13 are vertically arranged and are parallel to each other.
In the present invention, in specific implementation, the flat tube 4 is flat tube, has a plurality of microchannel in the flat tube 4
(for example, tens of subtle runners).Herein similarly to the prior art, it is not unfolded to describe.
In the present invention, in specific implementation, multiple fins 5 are distributed in the two sides up and down of every flat tube 4 respectively, to increase
The effect to exchange heat by force.
In the present invention, in specific implementation, for the utility model, because being used as evaporator, the entrance
The length of collector 3 is less than the length of outlet header 8, that is to say, that the corresponding flat tube number of first pass should be less than second procedure
Flat tube number.
In the present invention, in specific implementation, in specific implementation, the air guide tubule 7 be located at confluence collector 6 just on
Side.
In specific implementation, the length and caliber of air guide tubule 7 can change, specifically according to specific heat exchange situation
Length is by formula: L=a*Qb+ c is determined；Specific bore is by formula: D=m*Qn+ e is determining,
Wherein, L is the length of air guide tubule, m；
Q is the mass flow of micro-channel evaporator, kg/s；
D is the bore of air guide tubule, m；
A, b, c, m, n, e can be fitted according to experiment parameters such as refrigerant mass fluxes, pressure difference and evaporating temperatures.
It should be noted that in the present invention, by dividing journey baffle 9, more flat tubes 4 are divided for the flat of first pass
Manage the flat tube with second procedure, wherein be highly higher than and the flat tube 4 of journey baffle 9 is divided to be the flat tube of first pass, and be highly lower than and divide
The flat tube 4 of journey baffle 9 is the flat tube of second procedure.That is, being highly higher than the flat tube 4 for dividing journey baffle 9 in specific implementation
Quantity, the quantity less than height lower than the flat tube 4 for dividing journey baffle 9.
In the present invention, for micro-channel evaporator provided by the utility model, by dividing journey baffle 9 by double-flow
The main collector 13 of micro-channel evaporator is divided to for two processes, wherein inlet header 3 and the corresponding flat tube of inlet header 3 are evaporation
Device first pass；Outlet header 8 and the corresponding flat tube of outlet header 8 are evaporator second procedure.For the utility model, institute
To be set as double-flow, the circulation length of refrigerant can be increased, so that being more conducive to the phase-change heat-exchange of refrigerant.
It should be noted that in the present invention, the height of the inlet header 3 is less than the height of outlet header 8, it is
Because this is used as evaporator, inlet header feed flow, therefore the refrigerant liquid inside the inlet header in first pass
It is in the majority, account for small volume；And the refrigerant in second procedure will largely gasify, volume becomes larger, so second procedure is corresponding flat
Pipe number is more, so that the height of outlet header 8 is greater than the height of inlet header 3, and the volume of outlet header 8 should also be greater than
The volume of inlet header 3.
In the present invention, in specific implementation, the main function of inlet header 3 is: by lower liquid supply pipe 1 and upper liquid supply pipe
The refrigerant liquid of 2 supplies collects of short duration storage, and is supplied in the corresponding flat tube 4 of evaporator first pass.
In the present invention, in specific implementation, the main function of confluence collector 6 is: accepting outflow in first pass
Refrigerant is simultaneously supplied in the corresponding flat tube 4 of evaporator second procedure by gas-liquid two-phase cold-producing medium.
In the present invention, in specific implementation, the main function of outlet header 8 is: by refrigerant collecting and will freeze
Agent is supplied to exhaust pipe 12.
In the present invention, in specific implementation, the main function of exhaust pipe 12 is: the refrigerant export of gasification is micro- logical
Road evaporator is supplied to other equipment (compressor in such as refrigeration system) use.
For the utility model, main operational principle are as follows: working medium (such as liquid refrigerant) is by lower liquid supply pipe 1 and upper feed flow
Pipe 2 flows into inlet header 3, and liquid separation baffle 10 is arranged in the intermediate of inlet header 3, and working medium is entered by inlet header 3 has microchannel
Flat tube 4 in, outside the flat tube 4 with microchannel lay fin 5, working medium by with microchannel flat tube 5 enter confluence collector 6
Interior, the working medium after heat exchange becomes gas-liquid two-phase state, is provided with air guide tubule 7 right above the collector 6 that converges, at this time,
Converge in collector 6, due to the effect of gravity, gas is on top, and liquid is in lower part, the entrance flat tube of air guide tubule and second procedure
Pressure balance should be reached, so that gas flows into air guide tubule 7, entered in exhaust pipe 12 by air guide tubule 7；And liquid
Working medium is flowed into the flat tube of second procedure and is exchanged heat, in the working medium and then flow inlet and outlet collector 8 after continuing heat exchange, then
Working medium finally flows into exhaust pipe 12 by check valve 11.
Wherein, exhaust pipe 12 is provided with check valve 11, and effect is to guarantee the one-way flow of gas, avoids flowing back.In addition, entering
A point journey baffle 9 is disposed between mouth collector 3 and outlet header 8.The length and caliber of air guide tubule 7 can according to specific heat exchange situation
To change.Main collector 13 can be divided to for the structure of two processes by point journey baffle 9, and the structure of first pass is in lower part, second
The structure of journey is on top.
It should be noted that for the utility model, system uneven for existing double-flow micro-channel evaporator feed flow
Cryogen is due to gas liquid two-phase flow phase in the problem of gravity is gathered in inlet header lower part and lower part flat tube and microchannel
Mutually the problem of interference.It is larger in particular for gas flow in second procedure in double-flow micro-channel evaporator, seriously reduce
Liquid refrigerant feed flow uniformity can be improved in the technical issues of effective heat exchange area of two processes, the utility model, while can
To improve inlet header overhead refrigerant flow velocity and flow, and then it is each to improve novel double liquid supply pipe micro-channel evaporator first pass
Flat tube liquid refrigerant flow velocity, flow and uniformity, while gas is discharged in time for the air guide tubule of micro-channel evaporator, liquid
Into in the microchannel of second procedure flat tube, second procedure inner refrigerant flow can be increased, improved in refrigerant second procedure
Feed flow uniformity, the utility model can make full use of the heat exchange area of the second procedure of micro-channel evaporator, make full use of micro-
The heat exchange area of microchannel evaporator, enhancing heat exchange, to improve micro-channel evaporator heat exchange efficiency.
In addition, also directed to existing micro-channel evaporator feed flow, uneven, refrigerant is due to gravity for the utility model
The technical issues of effect is gathered in inlet header lower part and lower part flat tube, and a kind of new technical solution is provided, the utility model
The uniformity of liquid refrigerant feed flow can be improved, while the flow velocity and flow of inlet header overhead refrigerant can be improved, into
And liquid refrigerant flow velocity, flow and the uniformity of each flat tube in the first pass of entire micro-channel evaporator are improved, it is sufficiently sharp
With the heat exchange area of micro-channel evaporator, enhancing heat exchange, to improve micro-channel evaporator heat exchange efficiency.
In conclusion compared with prior art, pair with double liquid supply pipes and air guide tubule provided by the utility model
The gas-liquid separation in micro-channel evaporator in second procedure may be implemented in process micro-channel evaporator, and it is thin that gas enters air guide
Pipe, liquid enters second procedure flat tube, can thus increase second procedure inner refrigerant flow, to improve refrigerant second
Feed flow uniformity in process makes full use of the heat exchange area of the second procedure of micro-channel evaporator, therefore, can be effectively relieved micro-
The problem of gas liquid two-phase flow interferes with each other in channel improves the heat transfer effect of micro-channel evaporator, guarantees micro-channel evaporator
Heat exchange property, be conducive to widely apply, be of great practical significance.
In addition, inlet header refrigerant feed liquid uniformity can be improved in the utility model, inlet header top refrigeration is improved
Agent flow velocity and flow, and then improve the flow velocity of all flat tube inner refrigerants of first pass in micro-channel evaporator, flow and uniformly
Property, improve micro-channel evaporator heat transfer effect.
The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art
For art personnel, without departing from the principle of this utility model, several improvements and modifications can also be made, these improve and
Retouching also should be regarded as the protection scope of the utility model.
Claims (8)
1. the double-flow micro-channel evaporator with double liquid supply pipes and air guide tubule, which is characterized in that including between left and right every setting
, hollow confluence collector (6) and main collector (13)；
Confluence collector (6) side opposite with main collector (13) is connected by the flat tube (4) of more cross direction profiles；
Point journey baffle (9) of cross direction profiles is provided in the main collector (13), it is described to divide journey baffle (9) by the main collector
(13) it is divided into (8) two cavitys of inlet header (3) and outlet header, the inlet header (3) is located under outlet header (8)
Side；
It is provided with the liquid separation baffle (10) of cross direction profiles in the inlet header (3), the liquid separation baffle (10) is by the entrance
Collector (3) is divided into two cavitys of upper plenum and lower cavity；
The upper plenum of the inlet header (3) is connected with upper liquid supply pipe (2), the lower cavity of the inlet header (3) and lower confession
Liquid pipe (1) is connected；
The right upper portion of the outlet header (8) is connected by a check valve (11) with an exhaust pipe (12)；
The top of confluence collector (6) is connected by an air guide tubule (7) with the exhaust pipe (12).
2. micro-channel evaporator as described in claim 1, which is characterized in that the confluence collector (6) and main collector (13) hang down
Directly it is arranged and is parallel to each other.
3. micro-channel evaporator as described in claim 1, which is characterized in that the flat tube (4) is flat tube, the flat tube
(4) there is a plurality of microchannel in.
4. micro-channel evaporator as described in claim 1, which is characterized in that the two sides up and down of every flat tube (4) are distributed respectively
There are multiple fins (5).
5. micro-channel evaporator as described in claim 1, which is characterized in that the air guide tubule (7) is located at confluence collector (6)
Surface.
6. the micro-channel evaporator as described in any one of claims 1 to 5, which is characterized in that the height of the inlet header (3)
Degree is less than the height of outlet header (8).
7. the micro-channel evaporator as described in any one of claims 1 to 5, which is characterized in that the body of the outlet header (8)
Product is greater than the volume of inlet header (3).
8. the micro-channel evaporator as described in any one of claims 1 to 5, which is characterized in that be highly higher than and divide journey baffle (9)
Flat tube (4) quantity, less than height lower than divide journey baffle (9) flat tube (4) quantity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822020450.3U CN209415844U (en) | 2018-12-04 | 2018-12-04 | Double-flow micro-channel evaporator with double liquid supply pipes and air guide tubule |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822020450.3U CN209415844U (en) | 2018-12-04 | 2018-12-04 | Double-flow micro-channel evaporator with double liquid supply pipes and air guide tubule |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209415844U true CN209415844U (en) | 2019-09-20 |
Family
ID=67936590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822020450.3U Expired - Fee Related CN209415844U (en) | 2018-12-04 | 2018-12-04 | Double-flow micro-channel evaporator with double liquid supply pipes and air guide tubule |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209415844U (en) |
-
2018
- 2018-12-04 CN CN201822020450.3U patent/CN209415844U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190920 Termination date: 20201204 |
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| CF01 | Termination of patent right due to non-payment of annual fee |