CN108204755B - A kind of damping noise reduction heat pipe - Google Patents
A kind of damping noise reduction heat pipe Download PDFInfo
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- CN108204755B CN108204755B CN201710195727.3A CN201710195727A CN108204755B CN 108204755 B CN108204755 B CN 108204755B CN 201710195727 A CN201710195727 A CN 201710195727A CN 108204755 B CN108204755 B CN 108204755B
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- tedge
- collector
- constant
- pipe
- current stabilizer
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- 238000013016 damping Methods 0.000 title claims description 10
- 230000009467 reduction Effects 0.000 title claims description 10
- 239000003381 stabilizer Substances 0.000 claims abstract description 71
- 238000009833 condensation Methods 0.000 claims abstract description 40
- 230000005494 condensation Effects 0.000 claims abstract description 40
- 238000001704 evaporation Methods 0.000 claims abstract description 26
- 230000008020 evaporation Effects 0.000 claims abstract description 24
- 239000012530 fluid Substances 0.000 claims abstract description 18
- 238000002207 thermal evaporation Methods 0.000 claims abstract description 4
- 230000006641 stabilisation Effects 0.000 claims description 5
- 238000011105 stabilization Methods 0.000 claims description 5
- 239000007788 liquid Substances 0.000 abstract description 16
- 238000012546 transfer Methods 0.000 abstract description 14
- 230000003416 augmentation Effects 0.000 abstract description 4
- 230000005514 two-phase flow Effects 0.000 abstract description 4
- 230000003313 weakening effect Effects 0.000 abstract 1
- 239000012071 phase Substances 0.000 description 18
- 230000000694 effects Effects 0.000 description 14
- 239000007791 liquid phase Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 5
- 230000002776 aggregation Effects 0.000 description 4
- 238000004220 aggregation Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000630 rising effect Effects 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 238000010025 steaming Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
Abstract
The present invention provides a kind of heat pipes, including evaporation collector, condensation collector, tedge and return pipe, the tedge is connected with evaporation collector and condensation collector, the evaporation collector is located at lower part, the condensation collector is located at top, and the fluid enters condensation collector by tedge in evaporation collector interior suction thermal evaporation, it is condensed after being exchanged heat in condensation collector, the fluid of condensation returns to evaporation collector by return pipe；Constant-current stabilizer is set in the tedge, constant-current stabilizer is set in the tedge, the multiple constant-current stabilizers of setting in same root tedge, along the short transverse of tedge, the length of the constant-current stabilizer is continuously increased.The present invention is changed by the length of constant-current stabilizer, there are when Gas- liquid two-phase flow in tedge, augmentation of heat transfer, while weakening the vibration of tedge, reduce noise level.
Description
Technical field
The invention belongs to heat pipe field more particularly to a kind of heat exchange heat pipes.
Background technique
Hot pipe technique is George Ge Luofo of U.S. Los Alamos (Los Alamos) National Laboratory in 1963
One kind of (George Grover) invention is known as the heat transfer element of " heat pipe ", it takes full advantage of heat-conduction principle and phase transformation is situated between
The heat of thermal objects is transmitted to outside heat source rapidly by the quick thermal transport property of matter through heat pipe, and the capacity of heat transmission is more than to appoint
The capacity of heat transmission of what known metal.
The industries such as aerospace, military project were widely used in front of hot pipe technique, since being introduced into radiator manufacturing, so that
People change the mentality of designing of traditional heat sinks, get rid of the list for obtaining more preferable heat dissipation effect by high air quantity motor merely
One radiating mode makes radiator obtain satisfied heat transfer effect using hot pipe technique, opens heat dissipation industry new world.At present
Heat pipe is widely used in various heat exchange equipments, including nuclear power field, such as the UTILIZATION OF VESIDUAL HEAT IN of nuclear power etc..
On the one hand, heat pipe is in evaporation process, inevitably in carrying of liquids to tedge, simultaneously as condensation end
Exothermic condensation so that liquid also inevitably enters tedge, so that tedge there are liquid in condensation end
Interior fluid is liquid-vapor mixture, while heat pipe in the process of running can be because of the on-condensible gas of aging generation, on-condensible gas one
As rise to the condensation end on heat pipe top, the presence of on-condensible gas leads to the pressure increase in condensation end of heat pipe, and pressure makes
Flowing in the upward riser of liquid.Greatly affect the efficiency of heat exchange.
On the other hand, condensation this section of collector, because the space of this section becomes larger suddenly, space are exported to from tedge
Variation will lead to quickly flowing upwards out and assemble for gas, therefore spatial variations will lead to the vapour phase (vapour group) of aggregation from tedge
Position enters condensation collector, and due to gas (vapour) liquid density contrast, air mass leaves adapter tube position and will move rapidly upward, and air mass is former empty
Between position the liquid of wall surface is pushed away by air mass while will also spring back and hit wall surface rapidly, formed impingement phenomenon.Gas (vapour) liquid phase
More discontinuous, air mass aggregation is bigger, and Impact energy is bigger.Impingement phenomenon will cause biggish noise vibration and mechanical shock, right
Equipment damages.
In view of the above-mentioned problems, the present invention is improved on the basis of invention in front, a kind of new heat pipe is provided, from
And solve the problems, such as that the coefficient of heat transfer in the case where heat pipe heat exchanging is low and its heat exchange is non-uniform.
Summary of the invention
The present invention provides a kind of new heat pipes, to solve the technical issues of front occurs.
To achieve the goals above, technical scheme is as follows:
A kind of damping noise reduction heat pipe, including evaporation collector, condensation collector, tedge and return pipe, the tedge and steaming
Hair collector is connected with condensation collector, and the evaporation collector is located at lower part, and the condensation collector is located at top, and the fluid is steaming
The thermal evaporation of collector interior suction is sent out, enters condensation collector by tedge, is condensed after being exchanged heat in condensation collector, the fluid of condensation
Evaporation collector is returned to by return pipe；It is characterized in that, constant-current stabilizer is set in the tedge, setting in same root tedge
Multiple constant-current stabilizers, along the short transverse of tedge, the length of the constant-current stabilizer is continuously increased.
Preferably, the ever-increasing amplitude of the length of the constant-current stabilizer is increasingly along the short transverse of tedge
Greatly.
Preferably, the constant-current stabilizer includes core and shell, the core setting in the shell, the shell with it is upper
Riser inner wall is connected and fixed, and the core is composed of together a number of pipe adjoining.
Preferably, by the way that insert is arranged in the space between shell and outermost layer pipe, so that tight between pipe
Close connection, while making pipe fixed in the shell.
Preferably, aperture is arranged between adjacent pipe realizes perforation.
Preferably, groove is arranged in the rising inside pipe wall, the shell of the constant-current stabilizer is arranged in groove, described outer
The inner wall of shell and the aligning inner of tedge.
Preferably, tedge is welded for multi-segment structure, constant-current stabilizer is arranged in the junction of multi-segment structure.
Preferably, the distance between adjacent constant-current stabilizer is S, the length of constant-current stabilizer is C, and the outer diameter of tedge is W,
The pipe diameter of constant-current stabilizer is D, meets following require:
S/C=a-b*LN (W/D)；Wherein LN is logarithmic function, and a, b are parameters, wherein 4.8 < a < 5.8,1.4 <b < 2.0；
Wherein the spacing of constant-current stabilizer is the both ends the distance between opposite with adjacent constant-current stabilizer；
34<W<58mm；
7<D<12mm；
19<C<27mm；
50<S<70mm。
Preferably, the caliber of the evaporation collector is less than the caliber of condensation collector.
Preferably, evaporation collector internal diameter be R1, condense collector internal diameter be R2, as preferably then 0.45 < R1/R2 <
0.88。
Compared with prior art, the present invention has the advantage that:
1) present invention is changed by the length of constant-current stabilizer, there are when Gas- liquid two-phase flow in tedge, augmentation of heat transfer,
Weaken the vibration of tedge simultaneously, reduces noise level.
2) multitube constant-current stabilizer is arranged in the present invention in tedge, is separated two-phase fluid by multitube constant-current stabilizer
At liquid phase and vapour phase, liquid phase is divided into small liquid group, vapour phase is divided into minute bubbles, promotes vapour phase smooth outflow, plays stabilization
The effect of flow has the effect of vibration and noise reducing, improves heat transfer effect.
3) present invention is equivalent in tedge by setting multitube constant-current stabilizer and increases inner fin, enhanced and changed
Heat improves heat transfer effect.
4) present invention avoids only because vehicle repair major is divided in the entire cross-section location of tedge
Tedge inner wall is split, thus entirely rise realized on tube section expand liquid-vaqor interface and vapour phase boundary layer with it is cold
But the contact area of wall surface and enhance disturbance, reduce noise and vibration, enhance heat transfer.
5) distance, the length of constant-current stabilizer of the invention by being arranged between adjacent constant-current stabilizer in tedge short transverse
The rule variation of the parameters size such as outer diameter of degree, pipe reduces noise to further reach steady flow result, improves heat exchange effect
Fruit.
6) present invention has been carried out widely by heat exchange rule caused by the variation to multitube constant-current stabilizer parameters
Research, when meeting flow resistance, realizes the best relation formula of the effect of vibration and noise reducing.
Detailed description of the invention
Fig. 1 is heat pipe structure schematic diagram of the invention；
Fig. 2 constant-current stabilizer cross-sectional structure schematic diagram of the present invention；
Fig. 3 is constant-current stabilizer of the present invention arrangement schematic diagram in tedge；
Fig. 4 is another schematic diagram that constant-current stabilizer of the present invention is arranged in tedge.
In figure: 1, evaporating collector, 2, condensation collector, 3, tedge, 4, constant-current stabilizer, 41 shells, 42 pipes, 5, return pipe
Specific embodiment
Specific embodiments of the present invention will be described in detail with reference to the accompanying drawing.
Herein, if without specified otherwise, it is related to formula, "/" indicates that division, "×", " * " indicate multiplication.
A kind of heat pipe as shown in Figure 1, including evaporation collector 1, condensation collector 2, tedge 3 and return pipe 5, the rising
Pipe 3 is connected with evaporation collector 1 and condensation collector 2, and the evaporation collector 1 is located at lower part, and the condensation collector 2 is located at top,
The fluid enters condensation collector 2 in evaporation 1 interior suction thermal evaporation of collector, by tedge 3, exchanges heat in condensation collector 2
After condense, the fluid of condensation returns to evaporation collector 1 by return pipe 5；Constant-current stabilizer 4, the current stabilization are set in the tedge 3
Device 4 is as shown in Fig. 2, include core 42 and shell 41, the core 42 is arranged in shell 41, the shell 41 and tedge
3 inner walls are connected and fixed, and the core is composed of together a number of adjoining of pipe 42.
Multitube constant-current stabilizer is arranged in the present invention in tedge 3, will be in two-phase fluid by multitube constant-current stabilizer
Liquid phase and vapour phase are separated, and liquid phase is divided into small liquid group, vapour phase is divided into minute bubbles, avoid the complete of liquid phase and vapour phase
It separates, promotes liquid vapor phase smooth outflow, play the role of regime flow, have the effect of vibration and noise reducing.
The present invention is equivalent to by setting multitube constant-current stabilizer and increases inner fin in tedge 3, enhanced and changed
Heat improves heat transfer effect.
The present invention is because all cross-section locations by vehicle repair major in tedge 3 are divided, thus on entire
The segmentation of liquid-vaqor interface and vapour phase boundary layer and the contact area of cooling wall are realized on riser cross section and enhances disturbance, significantly
Reduce noise and vibration, enhance heat transfer.
Preferably, the position of the both side ends of the connection of return pipe 5 evaporation collector 1 and condensation collector 2.Guarantee fluid in this way
Flow path in condensation collector 2 is long, can further increase heat-exchange time, improves heat exchange efficiency.
Preferably, guaranteeing pipe by the way that insert is arranged in the space 43 between shell 42 and outermost layer pipe 41
Between closely connect, while guaranteeing that pipe 41 is fixed in shell 42.
Preferably, adjacent pipe 41 is by being welded together.It is linked together, be ensure that by welding manner
Being connected firmly between pipe 41.
Preferably, aperture is arranged between adjacent pipe 41 realizes perforation.By the way that aperture is arranged, it is ensured that adjacent pipe
It is interconnected between son, pressure that can uniformly between pipe, so that the fluid of high pressure runner flows to low pressure, while can also be
Fluid further separates liquid phase and vapour phase while flowing, is conducive to further stablize two-phase flow.
Preferably, heat exchange pipeline is passed through in condensation collector 2, in the fluid in the heat exchange pipeline and condensation collector 2
Steam exchanges heat.
Preferably, tedge 3 and evaporation collector 1 are all endothermic sections.
Preferably, setting is more in tedge 3 along the flow direction (i.e. the short transverse of Fig. 2) of fluid in tedge 3
A constant-current stabilizer 4, from the entrance of tedge to the outlet of tedge, the distance between adjacent constant-current stabilizer is shorter and shorter.If away from
It is H with a distance from tube inlet from rising, the distance between adjacent constant-current stabilizer is S, S=F1(H), i.e. S is using height H as variable
Function, S ' are the first order derivatives of S, meet following require:
S'<0；
Main cause is that carrier's liquid is understood in uphill process because of the steam in tedge, in uphill process, on
Riser is constantly heated, and causes the steam in biphase gas and liquid flow more and more, because the vapour phase in stream-liquid two-phase flow is more and more,
Exchange capability of heat in tedge can increase with vapour phase and weaken relatively, and vibration and its noise also can be continuous with vapour phase increase
Increase.Therefore the distance between the adjacent constant-current stabilizer for needing to be arranged is shorter and shorter.
In addition, exporting to condensation this section of collector, because the space of this section becomes larger suddenly, the variation in space from tedge
It will lead to quickly flowing upwards out and assemble for gas, therefore spatial variations will lead to the vapour phase (vapour group) of aggregation from tedge position
Into condensation collector, due to gas (vapour) liquid density contrast, air mass leaves adapter tube position and will move rapidly upward, and air mass original space bit
It sets and the liquid of wall surface is pushed away by air mass while will also spring back and hit wall surface rapidly, form impingement phenomenon.Gas (vapour) liquid phase is more not
Continuously, air mass aggregation is bigger, and water hammer energy is bigger.Impingement phenomenon will cause biggish noise vibration and mechanical shock, to equipment
It damages.Therefore in order to avoid the generation of this phenomenon, the distance between adjacent constant-current stabilizer being arranged at this time is shorter and shorter,
To constantly separate gas phase and liquid phase in fluid delivery process, to reduce vibration and noise to the full extent.
It is found through experiments that, by above-mentioned setting, can both reduce vibration and noise to the full extent, while can mention
High heat transfer effect.
Further preferably, from the entrance of tedge 3 to the outlet of tedge 3, the distance between adjacent constant-current stabilizer is more next
Shorter amplitude is continuously increased.That is S " is the second derivative of S, meets following require:
S">0；
It is found through experiments that, by being improved simultaneously so set, 9% or so vibration and noise can be further decreased
7% or so heat transfer effect.
Preferably, the length of each constant-current stabilizer 4 remains unchanged.
Preferably, other than the distance between adjacent constant-current stabilizer 4, constant-current stabilizer others parameter (such as length,
Caliber etc.) it remains unchanged.
Preferably, along the short transverse of tedge 6, the multiple constant-current stabilizers 5 of setting in tedge 6, from tedge 6
For entrance to the outlet of tedge 6, the length of constant-current stabilizer 5 is increasingly longer.I.e. the length of constant-current stabilizer is C, C=F2(X), C ' is
The first order derivative of C meets following require:
C'>0；
Further preferably, from the entrance of tedge to the outlet of tedge, the increasingly longer amplitude of the length of constant-current stabilizer
It is continuously increased.That is C " is the second derivative of C, meets following require:
C">0；
The variation of the distance between for example adjacent constant-current stabilizer of specific reason is identical.
Preferably, the distance between adjacent constant-current stabilizer remains unchanged.
Preferably, the length in addition to constant-current stabilizer is outside one's consideration, constant-current stabilizer others parameter (such as adjacent spacing, caliber
Deng) remain unchanged.
Preferably, along the short transverse of tedge 6, the multiple constant-current stabilizers of setting in tedge 6, from tedge 6
For entrance to the outlet of tedge 6, the diameter of the pipe 51 in different constant-current stabilizers 5 is smaller and smaller.That is the pipe of constant-current stabilizer is straight
Diameter is D, D=F3(X), D ' is the first order derivative of D, meets following require:
D'<0；
Preferably, from the entrance of tedge to the outlet of tedge, the smaller and smaller width of the pipe diameter of constant-current stabilizer
Degree is continuously increased.I.e.
D " is the second derivative of D, meets following require:
D”>0。
The variation of the distance between for example adjacent constant-current stabilizer of specific reason is identical.
Preferably, the length of constant-current stabilizer and the distance of adjacent constant-current stabilizer remain unchanged.
Preferably, other than the pipe diameter of constant-current stabilizer, constant-current stabilizer others parameter (such as it is length, adjacent steady
The distance between stream device etc.) it remains unchanged.
Further preferably, as shown in figure 3, groove is arranged inside the tedge 3, the shell 42 of the constant-current stabilizer 4 is set
It sets in groove.
Preferably, the aligning inner of the inner wall of shell 42 and tedge 3.By alignment, so that tedge inner wall table
Reach on face in the same plane, guarantees the smooth of surface.
Preferably, the thickness of shell 42 is less than the depth of groove, tedge inner wall can be made to form groove in this way,
To carry out augmentation of heat transfer.
Further preferably, as shown in figure 4, tedge 3 is welded for multi-segment structure, the junction setting of multi-segment structure is steady
Flow device 4.This mode makes being simple to manufacture for the tedge that constant-current stabilizer is arranged, and cost reduces.
It is learnt by analyzing and testing, the spacing between constant-current stabilizer cannot be excessive, leads to damping noise reduction if excessive
Effect it is bad, while can not be too small, cause resistance excessive if too small, similarly, the outer diameter of pipe can not it is excessive or
Too small, the effect for also resulting in damping noise reduction is bad or resistance is excessive, therefore the present invention is through a large number of experiments, preferentially full
The normal flow resistance of foot (total pressure-bearing be 2.5Mpa hereinafter, the on-way resistance of single riser be less than or equal to 5Pa/M)
In the case of, so that being optimal of damping noise reduction, has arranged the optimal relationship of parameters.
The distance between adjacent constant-current stabilizer is S, and the length of constant-current stabilizer is C, and the outer diameter of tedge is W, constant-current stabilizer
Tube outer diameter be D, meet following require:
S/C=a-b*LN (W/D)；Wherein LN is logarithmic function, and a, b are parameters, wherein 4.8 < a < 5.8,1.4 <b < 2.0；
Further preferred 5.1 < a < 5.5,1.6 <b < 1.8；
Wherein the interval S of constant-current stabilizer is the both ends the distance between opposite with adjacent constant-current stabilizer；I.e. front current stabilization fills
The distance between the front end of the tail end set and constant-current stabilizer below.Referring specifically to the mark of Fig. 4.
34mm<W<58mm；
7mm<D<12mm；
19mm<C<27mm；
50mm<S<70mm。
Preferably, rising length of tube L between 3000-5500mm.Further preferably, between 3500-4500mm.
Further preferably, 40mm < W < 50mm；
9mm<D<10mm；
22mm<C<25mm；
55mm<S<60mm。
By the preferred of the optimal geometric scale of above-mentioned formula, can be realized under the conditions of meeting normal flow resistance,
Damping noise reduction reaches optimum efficiency.
Further preferably, as the increase of W/D, a constantly reduce, b constantly increases.
Further preferably, a=5.31, b=1.75.
For parameters such as other parameters, such as tube wall, shell wall thickness according to normal standard setting.
Preferably, hot tube fluid is water.
Preferably, pipe 41 extends in the whole length direction of constant-current stabilizer 4.I.e. the length of pipe 41 is filled equal to current stabilization
Set 5 length.
Preferably, the caliber of the evaporation collector 1 is less than the caliber of condensation collector 2.
The internal diameter for evaporating collector is R1, and the internal diameter for condensing collector is R2, as preferably then 0.45 < R1/R2 < 0.88.
By above-mentioned setting, can further augmentation of heat transfer, can be improved 7% or more heat exchange efficiency.
Although the present invention has been disclosed in the preferred embodiments as above, present invention is not limited to this.Any art technology
Personnel can make various changes or modifications, therefore protection scope of the present invention is answered without departing from the spirit and scope of the present invention
When being defined by the scope defined by the claims..
Claims (4)
1. a kind of damping noise reduction heat pipe, including evaporation collector, condensation collector, tedge and return pipe, the tedge and evaporation
Collector is connected with condensation collector, and the evaporation collector is located at lower part, and the condensation collector is located at top, and fluid is in evaporation collector
Interior suction thermal evaporation enters condensation collector by tedge, condenses after being exchanged heat in condensation collector, the fluid of condensation passes through back
Flow tube returns to evaporation collector；It is characterized in that, constant-current stabilizer is arranged in the tedge, setting is multiple steady in same root tedge
Device is flowed, along the short transverse of tedge, the length of the constant-current stabilizer is continuously increased；The constant-current stabilizer include core and
Shell, in the shell, the shell is connected and fixed with inside pipe wall is risen, and the core is by a number of for the core setting
Pipe adjoining is composed together.
2. damping noise reduction heat pipe as described in claim 1, which is characterized in that along the short transverse of tedge, the current stabilization
The ever-increasing amplitude of the length of device is increasing.
3. damping noise reduction heat pipe as described in claim 1, which is characterized in that pass through the sky between shell and outermost layer pipe
Interior setting insert so that closely connecting between pipe, while making pipe fixed in the shell.
4. heat pipe as described in claim 1, which is characterized in that aperture is arranged between adjacent pipe and realizes perforation.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710195727.3A CN108204755B (en) | 2017-03-29 | 2017-03-29 | A kind of damping noise reduction heat pipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710195727.3A CN108204755B (en) | 2017-03-29 | 2017-03-29 | A kind of damping noise reduction heat pipe |
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| CN108204755B true CN108204755B (en) | 2019-03-19 |
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| CN201710195727.3A Expired - Fee Related CN108204755B (en) | 2017-03-29 | 2017-03-29 | A kind of damping noise reduction heat pipe |
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| CN109237972B (en) * | 2017-04-21 | 2019-05-03 | 青岛中正周和科技发展有限公司 | A kind of heat pipe design method of porous constant-current stabilizer caliber change |
| CN110631266B (en) * | 2018-07-07 | 2020-08-18 | 威海文海节能科技有限公司 | Solar water heater with variable distance between condensing end stabilizing devices |
| CN110806016B (en) * | 2018-08-05 | 2020-12-01 | 温州润海机械有限公司 | Slot type solar collector system |
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| CN101639374A (en) * | 2009-08-26 | 2010-02-03 | 姚贤卿 | Multiphase flow rectifying device |
| CN101725740B (en) * | 2009-12-31 | 2012-03-28 | 广东联塑科技实业有限公司 | Impeller type water hammer-resistant mute check valve |
| CN103673418B (en) * | 2012-09-12 | 2016-08-03 | 珠海格力电器股份有限公司 | Refrigerant flow divider flow stabilizer and air-conditioner |
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