CN110530071A - Disturbing flow device and diverter assembly and air-conditioner set - Google Patents
Disturbing flow device and diverter assembly and air-conditioner set Download PDFInfo
- Publication number
- CN110530071A CN110530071A CN201910919279.6A CN201910919279A CN110530071A CN 110530071 A CN110530071 A CN 110530071A CN 201910919279 A CN201910919279 A CN 201910919279A CN 110530071 A CN110530071 A CN 110530071A
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- China
- Prior art keywords
- tube body
- flow device
- disturbing flow
- spiral
- tube
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
- F25B39/02—Evaporators
- F25B39/028—Evaporators having distributing means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/09—Improving heat transfers
Abstract
This application provides a kind of disturbing flow device and diverter assemblies and air-conditioner set.The disturbing flow device includes tube body and spiral turbulent, and the front end of tube body is used for feed liquor, and the rear end of tube body is for going out liquid to current divider.Spiral turbulent is fixed in tube body, and spiral turbulent is used to carry out flow-disturbing by fluid flow pattern annular in shape to the fluid by tube body.It applies the technical scheme of the present invention, before refrigerant leads to current divider, disturbing flow device can be first passed through, after refrigerant enters tube body, gas-liquid two-phase state can be made along the circumferential direction symmetrical by fluid flow pattern annular in shape by flow-disturbing under the action of spiral turbulent, provide advantageous entry condition for current divider shunting, it improves and shunts uniformity, evaporator is allowed to reach best exchange capability of heat.
Description
Technical field
The present invention relates to technical field of refrigeration equipment, in particular to a kind of disturbing flow device and diverter assembly and sky
Adjust unit.
Background technique
In order to guarantee the good exchange capability of heat of evaporator, need to increase refrigerant flow number using current divider.At the same time, cold
Matchmaker is by the way that, since pressure instantaneous variation leads to shwoot phase transformation, the refrigerant in diverter assembly is rendered as gas-liquid two-phase after restricting element
Mixed state.
As two-phase refrigerant flows in connecting tube between restricting element and evaporator, the difference of two alternate flow velocitys and by phase
Between active force continuous influence and driving, stratified flow, wave flow etc. is presented in the gas-liquid two-phase state of refrigerant at pipeline different cross section
Unstable asymmetry flow pattern, causes current divider liquid separation uneven.When current divider, which is installed, to be tilted, the aggravation of current divider liquid separation unevenness,
Poor anti jamming capability influences heat exchanger heat exchange.
Summary of the invention
The embodiment of the invention provides a kind of disturbing flow device and diverter assemblies and air-conditioner set, to solve in the prior art
The technical problem of the unevenness of liquid separation existing for current divider.
The application embodiment provides a kind of disturbing flow device, comprising: the front end of tube body, tube body is used for feed liquor, tube body
Rear end is for going out liquid to current divider；Spiral turbulent, is fixed in tube body, and spiral turbulent is used for the stream by tube body
Body carries out flow-disturbing by fluid flow pattern annular in shape.
In one embodiment, spiral turbulent includes the spiral turbulence blades being distributed along the length direction of tube body.
In one embodiment, spiral turbulence blades are multiple, and multiple spiral turbulence blades are distributed at intervals.
In one embodiment, multiple spiral turbulence blades are equally spaced.
In one embodiment, spiral turbulent further includes hollow tube, and hollow tube exists along the length direction setting of tube body
At the center of tube body, multiple spiral turbulence blades are arranged between the outside of hollow tube and the inside of tube body.
In one embodiment, disturbing flow device further include: inlet tube is connected to the front end of tube body, is used for feed liquor；Liquid out
Pipe, is connected to the rear end of tube body, for liquid out to current divider.
In one embodiment, the diameter of inlet tube is less than the diameter of the front end of tube body, the front end of inlet tube and tube body
Between by the first divergent structure connect.
In one embodiment, the diameter of outlet tube is less than the diameter of the rear end of tube body, the rear end of outlet tube and tube body
Between by the second divergent structure connect.
In one embodiment, disturbing flow device further includes filter screen, and filter screen setting is disturbed in tube body, and positioned at spiral
The upstream of fluid.
In one embodiment, the distance of front end of the spiral turbulent 20 apart from tube body 10 is L1, spiral turbulent 20
The distance of rear end apart from tube body 10 is L2, and L1 is that 1/10~1/6, L2 of the length of tube body 10 is greater than or equal to 2mm.
In one embodiment, the length of spiral turbulent 20 is the 1/2~4/5 of the length of tube body 10.
In one embodiment, the length of spiral turbulent 20 is the 2/3 of the length of tube body 10.
In one embodiment, spiral turbulence blades 21 are along the rotation angle of 10 central axes of tube body at 180 ° or more.
In one embodiment, the number of spiral turbulence blades 21 is more than or equal to 4.
Present invention also provides a kind of diverter assemblies, including above-mentioned disturbing flow device.
Present invention also provides a kind of air-conditioner set, including diverter assembly, diverter assembly is above-mentioned current divider group
Part.
In the above-described embodiments, before refrigerant leads to current divider, disturbing flow device, after refrigerant enters tube body, meeting can be first passed through
Flow-disturbing makes gas-liquid two-phase state along the circumferential direction symmetrical by fluid flow pattern annular in shape under the action of spiral turbulent, to divide
It flows device and the advantageous entry condition of offer is provided, improve and shunt uniformity, evaporator is allowed to reach best exchange capability of heat.
Detailed description of the invention
The attached drawing constituted part of this application is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is that disturbing flow device according to the present invention applies the structural schematic diagram on current divider；
Fig. 2 is the vertical profile structural schematic diagram of the embodiment of disturbing flow device according to the present invention；
Fig. 3 is the cross-sectional structural schematic diagram of the disturbing flow device of Fig. 2；
Fig. 4 is the schematic perspective view of the spiral turbulent of the disturbing flow device of Fig. 2；
Fig. 5 is the overlooking structure diagram of the spiral turbulent of Fig. 4；
Fig. 6 is the liquid phase distribution map after applying disturbing flow device；
Fig. 7 is that the disturbing flow device of Fig. 1 applies the liquid phase refrigerant cloud charts on current divider；
Fig. 8 is the perspective structure of the disturbing flow device of Fig. 2 with reference to figure.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, right below with reference to embodiment and attached drawing
The present invention is described in further details.Here, exemplary embodiment and its explanation of the invention is used to explain the present invention, but simultaneously
It is not as a limitation of the invention.
As shown in fig. 1, fig. 2 and fig. 8, of the invention to provide a kind of embodiment of disturbing flow device, the disturbing flow device packet
Tube body 10 and spiral turbulent 20 are included, the front end of tube body 10 is used for feed liquor, and the rear end of tube body 10 is for going out liquid to current divider 60.Spiral shell
Rotation turbulent 20 is fixed in tube body 10, and spiral turbulent 20 is used to carry out flow-disturbing by fluid to the fluid by tube body 10
Flow pattern annular in shape.
It applies the technical scheme of the present invention, before refrigerant leads to current divider, disturbing flow device can be first passed through, refrigerant enters tube body
After 10, gas-liquid two-phase state can be made along the circumferential direction symmetrical by fluid flow pattern annular in shape by flow-disturbing under the action of spiral turbulent 20
Distribution provides advantageous entry condition for current divider shunting, improves and shunt uniformity, evaporator is allowed to reach best exchange capability of heat.
As a preferred embodiment, filter screen 50 is arranged as shown in Fig. 2, disturbing flow device further includes filter screen 50
In tube body 10, and it is located at the upstream of spiral turbulent 20.In this way, filter screen 50 not only can be with impurity screening, it can also will be big
Bubble breaking is allowed to more uniformly be split.
As shown in Fig. 2, disturbing flow device further includes inlet tube 30 and outlet tube 40, before inlet tube 30 is connected to tube body 10
End is used for feed liquor；Outlet tube 40 is connected to the rear end of tube body 10, for liquid out to current divider.When in use, inlet tube 30 connects
On refrigerant pipe, outlet tube 40 is connected to the front end of current divider.
As a kind of more preferably embodiment, as shown in Fig. 2, the diameter of inlet tube 30 is less than the front end of tube body 10
Diameter is connected between inlet tube 30 and the front end of tube body 10 by the first divergent structure.So, two-phase refrigerant is from inlet tube
After 30 enter tube body 10, refrigerant is because separation of slowing down occurs in expanded in diameter in tube body 10, and liquid phase refrigerant is because pressure drop reason is along cavity
Diametrical direction expansion is come.More preferably, the diameter of outlet tube 40 is less than the diameter of the rear end of tube body 10, outlet tube 40 and pipe
It is connected between the rear end of body 10 by the second divergent structure.In this way, in order to which the refrigerant pipeline of outlet tube 40 and normal caliber connects
It connects.
As shown in Figure 3 and Figure 4, spiral turbulent 20 includes the spiral turbulence blades being distributed along the length direction of tube body 10
21, it allows refrigerant to generate enough centrifugal force by spiral turbulent 20 when in use, helps liquid phase refrigerant along 10 inner wall of tube body
It is uniformly distributed.More preferably, in the technical solution of the application, spiral turbulence blades 21 are 4,4 spiral turbulence blades
21 are distributed at intervals.Multiple spiral turbulence blades 21 can form multiple rotating channels, provide refrigerant enough centrifugal force, side
Liquid phase refrigerant is helped to be uniformly distributed along 10 inner wall of tube body.More preferably, multiple spiral turbulence blades 21 are equally spaced, with
It is along the circumferential direction symmetrical to further realize gas-liquid two-phase state.
As other optional embodiments, the quantity of spiral turbulence blades 21 can also be less than 4 or extra 4
A, the increase of 21 quantity of spiral turbulence blades is more conducive to liquid phase refrigerant and is uniformly distributed along 10 inner wall of tube body, but also will increase
Corresponding resistance, the actual quantity of spiral turbulence blades 21 need to be designed according to actual needs.
As shown in figure 3, spiral turbulent 20 further includes hollow tube 22, hollow as a kind of more preferably embodiment
For pipe 22 along the center that tube body 10 is arranged in the length direction of tube body 10, hollow tube 22 is arranged in multiple spiral turbulence blades 21
Between the external and inside of tube body 10.The presence of hollow tube 22 keeps constant flow area, and there is no obvious throttlings, can be effective
Control pressure drop.
Specifically, above-mentioned optimal embodiment is when in use, gas-liquid two-phase state refrigerant passes through filter screen 50 first and filters
Impurity, and be crushed air pocket by filter screen 50.Two-phase refrigerant from inlet tube 30 enter tube body 10, refrigerant in tube body 10 because
There is separation of slowing down in expanded in diameter, and liquid phase refrigerant comes because pressure drop reason expands along 10 diametrical direction of tube body.On this basis, two
Phase refrigerant respectively enters multiple rotating channels of premix element and the hollow tube 22 of centre.The presence of hollow tube 22 makes through-flow face
Product is kept constant, and there is no obvious throttlings, and pressure drop can be effectively controlled.Multiple rotating channels provide the enough centrifugal force of refrigerant, side
Liquid phase refrigerant is helped to be uniformly distributed along 10 inner wall of tube body.Further, since liquid phase refrigerant viscosity is higher, one is generated in flow process
Fixed wall attachment effect facilitates liquid phase and is distributed uniformly and circumferentially along the continuous drawout of flow channel cross-section, final liquid phase refrigerant
Disturbing flow device is flowed out in the form of proximate annular stream, into current divider, realized in current divider two-phase refrigerant secondary separation and
It is final to shunt.So, disturbing flow device of the invention is not only able to effectively filter out the impurity in refrigerant, can also be by incoming flow
Two-phase refrigerant is along the circumferential direction symmetrical, is supplied to downstream diverter one and is conducive to shunt uniform two-phase distribution.
As shown in Figure 1, disturbing flow device is mounted on current divider upstream, disturbing flow device and current divider spacing distance are as far as possible
Short, maximum distance is no more than 5cm.And the connecting tube between disturbing flow device and current divider is straight tube, and bend part is not present.Upper
It states under mounting condition, it is ensured that gas-liquid two-phase refrigerant realizes ideal liquid separation effect continuously across disturbing flow device and current divider.It needs
It is noted that disturbing flow device of the invention both can be used for current divider, also can be used alone.
As shown in figure 3, in the technical scheme of this embodiment, spiral turbulent 20 includes 4 spiral turbulence blades 21, it will
Cavity in tube body 10 is divided into tetra- part A, B, C, D.Two-phase refrigerant can flow separately through 22 5 portion of runner of A-D and hollow tube,
By the wall attachment effect of centrifugal force and viscous fluid, it is finally reached the purpose that liquid phase refrigerant is along the circumferential direction uniform, symmetrical.
As other optional embodiments, for the liquid separation effect for guaranteeing different cooling capacity air-conditionings, according to filter volumetric size and phase
Internals hollow tube caliber is separated, the number of rotating vane selects within the scope of 3-10 piece.
As shown in figure 4,4 spiral turbulence blades 21 are distributed on tube body 10,1-1,1-2,1-3,1-4 are four spiral shells respectively
The arrival end of turbulence blades 21 is revolved, 2-1,2-2,2-3,2-4 are the outlet end of four spiral turbulence blades 21.With one of spiral shell
For revolving turbulence blades 21, arrival end 1-1 extends along 22 axis of hollow tube to filter outlet direction, while with hollow tube axis
It is rotated for shaft.As shown in figure 5, perspective plane is made with entrance or exit end face, any one blade inlet end face and outlet
End face angle a can be arbitrary value in 0-360 degree.But at least guarantee that spiral turbulence blades 21 can be made by adjusting screw pitch simultaneously
Input end, such as 1-1, the rotation angle along hollow tube central axes is at 180 ° or more, it should be noted that spiral turbulence blades 21
Rotation angle along hollow tube central axes refers to the exit end face of spiral turbulence blades 21 relative to spiral turbulence blades 21
The angle of arrival end rotation.Specifically when in use, can arrange in pairs or groups different structure size spiral turbulence blades according to actual needs
21 constitute idetified separation inward turning runner, and according to cooling capacity, the matched combined of reasonable selection internals and filter screen improves different type of machines
Current divider liquid separation uniformity expands the scope of application.
As shown in Fig. 2, the length of spiral turbulent 20 control it is long by 2/3 or so in tube body 10, and away from tube body 10 after
Holding distance L1 is the long 1/10-1/6 of tube body 10, and L2 control is spaced between spiral turbulent 20 and filter screen 50 in 2mm or more, and
50 shape of filter screen is unlimited.Filter cavity draw ratio is no more than 4.
Above-mentioned optimal embodiment, disturbing flow device apply the liquid phase refrigerant cloud charts on current divider as shown in fig. 7,
It is as shown in the table to emulate data:
Current divider liquid separation data after installation filter:
Current divider liquid separation data when not installing filter:
Wherein standard deviation can effectively reflect the distributing homogeneity of current divider exit liquid phase refrigerant, new by the visible installation of table
Liquid phase quality flow standard difference is down to 0.001673 from 0.006408 after type filter, reduces 73.44%.
Such as Fig. 6, solid region domain representation installs after disturbing flow device liquid phase refrigerant quality in 7 outlet manifold capillaries of current divider
Flow distribution, liquid phase refrigerant is distributed when disturbing flow device is not installed in dashed region expression.As can be seen that liquid phase after installation disturbing flow device
Refrigerant shunts distributing homogeneity in capillary on 7 roads and is obviously improved.
As shown in the above, disturbing flow device of the invention has beneficial phase separation function, and gas-liquid two-phase refrigerant flows through
When disturbing flow device, disturbing flow device is not only able to effectively filter out the impurity in refrigerant, can also be by the two-phase refrigerant of incoming flow circumferentially
Direction is symmetrical, is supplied to downstream diverter one and is conducive to shunt uniform two-phase distribution, and refrigerant passes through point again at this time
Device is flowed, then can further realize mutually separation and liquid separation, be finally reached ideal liquid separation effect.
The present invention also provides a kind of diverter assembly, which includes above-mentioned disturbing flow device.Using above-mentioned
Disturbing flow device, disturbing flow device can be arranged in the upstream of diverter assembly, current divider can also be set by disturbing flow device
The component part of component.Gas-liquid two-phase efficiently separating along radial direction may be implemented by the disturbing flow device, make liquid phase refrigerant
Symmetrical cyclic annular flow pattern is presented, to reduce the structure design and requirement on machining accuracy to current divider.Disturbing flow device adds current divider
Combination, the idetified separation of two-phase refrigerant and symmetrical in the circumferential direction before realizing into evaporator finally makes to enter
The liquid phase refrigerant mass flow of each branch of evaporator is approximately equal.
The present invention also provides a kind of air-conditioner set, which includes above-mentioned diverter assembly.Using the technology
Scheme can be arranged disturbing flow device in diverter assembly upstream, realize evaporator on the basis of evaporator has diverter assembly
The gas-liquid two-phase refrigerant flow pattern of upstream is reset, and is formed symmetrical cyclic annular flow pattern, is greatly improved tapped downstream device assembly liquid separation
Uniformity and stability, and then improve evaporator efficiency and air-conditioner set efficiency.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the embodiment of the present invention can have various modifications and variations.All within the spirits and principles of the present invention, made
Any modification, equivalent substitution, improvement and etc. should all be included in the protection scope of the present invention.
Claims (16)
1. a kind of disturbing flow device characterized by comprising
Tube body (10), the front end of the tube body (10) are used for feed liquor, and the rear end of the tube body (10) is for going out liquid to current divider
(60)；
Spiral turbulent (20) is fixed in the tube body (10), and the spiral turbulent (20) is used for by described
The fluid of tube body (10) carries out flow-disturbing by fluid flow pattern annular in shape.
2. disturbing flow device according to claim 1, which is characterized in that the spiral turbulent (20) includes along the tube body
(10) the spiral turbulence blades (21) of length direction distribution.
3. disturbing flow device according to claim 2, which is characterized in that the spiral turbulence blades (21) be it is multiple, it is multiple
The spiral turbulence blades (21) are distributed at intervals.
4. disturbing flow device according to claim 3, which is characterized in that multiple spiral turbulence blades (21) are equally spaced
Distribution.
5. disturbing flow device according to claim 3, which is characterized in that the spiral turbulent (20) further includes hollow tube
(22), the hollow tube (22) is arranged at the center of the tube body (10) along the length direction of the tube body (10), Duo Gesuo
Spiral turbulence blades (21) are stated to be arranged between the outside of the hollow tube (22) and the inside of the tube body (10).
6. disturbing flow device according to claim 1, which is characterized in that the disturbing flow device further include:
Inlet tube (30), is connected to the front end of the tube body (10), is used for feed liquor；
Outlet tube (40), is connected to the rear end of the tube body (10), for liquid out to current divider.
7. disturbing flow device according to claim 6, which is characterized in that the diameter of the inlet tube (30) is less than the tube body
(10) diameter of front end is connect between the inlet tube (30) and the front end of the tube body (10) by the first divergent structure.
8. disturbing flow device according to claim 6, which is characterized in that the diameter of the outlet tube (40) is less than the tube body
(10) diameter of rear end is connect between the outlet tube (40) and the rear end of the tube body (10) by the second divergent structure.
9. disturbing flow device according to claim 1, which is characterized in that the disturbing flow device further includes filter screen (50), institute
Filter screen (50) setting is stated in the tube body (10), and is located at the upstream of the spiral turbulent (20).
10. disturbing flow device according to claim 9, which is characterized in that the spiral turbulent (20) is apart from the tube body
(10) distance of front end is L1, and the distance of rear end of the spiral turbulent (20) apart from the tube body (10) is L2, described
L1 is the 1/10~1/6 of the length of the tube body (10), and the L2 is greater than or equal to 2mm.
11. disturbing flow device according to claim 1, which is characterized in that the length of the spiral turbulent (20) is described
The 1/2~4/5 of the length of tube body (10).
12. disturbing flow device according to claim 11, which is characterized in that the length of the spiral turbulent (20) is described
The 2/3 of the length of tube body (10).
13. disturbing flow device according to claim 2, which is characterized in that the spiral turbulence blades (21) are along the tube body
(10) the rotation angle of central axes is at 180 ° or more.
14. disturbing flow device according to claim 3, which is characterized in that the number of the spiral turbulence blades (21) is greater than
Equal to 4.
15. a kind of diverter assembly, which is characterized in that including disturbing flow device described in any one of claims 1 to 14.
16. a kind of air-conditioner set, including diverter assembly, which is characterized in that the diverter assembly is described in claim 15
Diverter assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910919279.6A CN110530071A (en) | 2019-09-26 | 2019-09-26 | Disturbing flow device and diverter assembly and air-conditioner set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910919279.6A CN110530071A (en) | 2019-09-26 | 2019-09-26 | Disturbing flow device and diverter assembly and air-conditioner set |
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| Publication Number | Publication Date |
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| CN110530071A true CN110530071A (en) | 2019-12-03 |
Family
ID=68670391
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910919279.6A Pending CN110530071A (en) | 2019-09-26 | 2019-09-26 | Disturbing flow device and diverter assembly and air-conditioner set |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111076601A (en) * | 2019-12-12 | 2020-04-28 | 中国石油大学(华东) | Corrosion reduction mechanism with outlet spiral guide fins |
| CN111102417A (en) * | 2019-12-12 | 2020-05-05 | 中国石油大学(华东) | Bent pipe with inner spiral fins on near-wall surface |
| CN112097423A (en) * | 2020-09-10 | 2020-12-18 | 唐正杰 | Refrigerant flow dividing device of air conditioner and using method thereof |
-
2019
- 2019-09-26 CN CN201910919279.6A patent/CN110530071A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111076601A (en) * | 2019-12-12 | 2020-04-28 | 中国石油大学(华东) | Corrosion reduction mechanism with outlet spiral guide fins |
| CN111102417A (en) * | 2019-12-12 | 2020-05-05 | 中国石油大学(华东) | Bent pipe with inner spiral fins on near-wall surface |
| CN111076601B (en) * | 2019-12-12 | 2021-05-11 | 中国石油大学(华东) | Corrosion reduction mechanism with outlet spiral guide fins |
| CN111102417B (en) * | 2019-12-12 | 2021-05-11 | 中国石油大学(华东) | Bent pipe with inner spiral fins on near-wall surface |
| CN112097423A (en) * | 2020-09-10 | 2020-12-18 | 唐正杰 | Refrigerant flow dividing device of air conditioner and using method thereof |
| CN112097423B (en) * | 2020-09-10 | 2022-02-18 | 佛山市艺兴冷气工程有限公司 | Refrigerant flow dividing device of air conditioner and using method thereof |
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