CN104990292B - Heat supply well head waste-heat recoverer - Google Patents
Heat supply well head waste-heat recoverer Download PDFInfo
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- CN104990292B CN104990292B CN201510335820.0A CN201510335820A CN104990292B CN 104990292 B CN104990292 B CN 104990292B CN 201510335820 A CN201510335820 A CN 201510335820A CN 104990292 B CN104990292 B CN 104990292B
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Abstract
The invention discloses a kind of heat supply well head waste-heat recoverer, including：Steam heat-exchanging unit, heat storage units, defendance unit, steam collector unit；The steam heat-exchanging unit includes cylindrical tube, the heat storage units are the storage tank of at least one segment, it is external that the storage tank is set in cylindrical tube, the steam collector unit is the funnel of an inverted guiding polymerizing steam, the upper perforate of the funnel is connected with the bottom surface of the cylindrical tube of the steam heat-exchanging unit, the defendance unit is a cylindrical tube, the access door for close passage is provided with the cylindrical tube, the steam heat-exchanging unit, heat storage units, steam collector unit is arranged in cylindrical tube, the top surface of the cylindrical tube is extended to outside cylindrical tube, the lower perforate of the funnel of the steam collector unit is connected with the bottom surface of cylindrical tube.The present invention carries out heating power recovery to the steam that heat supply well head is produced, according to difference its rate of recovery up to 55% ~ 85% of user's temperature.
Description
Technical field
The invention belongs to energy recovery technical field, and in particular to a kind of heat supply well head waste-heat recoverer.
Background technology
Winter heat supply is the basic measures that one, northern area government ensures basic people's livelihood life, and it is each to lay heating pipe
The mode that ground is adopted only has nothing but two kind first for method of directly burring, and second lays two kinds of method for ground-based duct.But no matter both sides
Any in formula, which all exists once insulation material and water contact or is lost after heat insulation effect by water penetration, produces in the winter time
One wonder --- well head is sprayed.This fog overwhelming majority is produced by 75 DEG C ~ 95 DEG C of a heat supply pipeline power consumption, this
It is passive and irreversible to plant power consumption.And this consumption is undoubtedly very big waste, and there is resident and supplied in various places
The accident that hot channel maintenance well head is scalded.Some heating enterprises are taken and lay one similar to small-sized in well head under this background
The device of chimney arranges hot gas in the height higher than Human Height, and other heating enterprise helpless is not just taken to this
Any conduct.
The content of the invention
In view of this, present invention is primarily targeted at providing a kind of heat supply well head waste-heat recoverer.
To reach above-mentioned purpose, the technical scheme is that what is be achieved in that：
The embodiment of the present invention provides a kind of heat supply well head waste-heat recoverer, and the recover includes：Steam heat-exchanging unit, heat accumulation
Unit, defendance unit, steam collector unit；The steam heat-exchanging unit includes cylindrical tube, and the heat storage units are at least
The storage tank of one segment, the storage tank are set in cylindrical tube in vitro, and the steam collector unit is that an inverted guiding is poly-
The funnel of steam is closed, the upper perforate of the funnel is connected with the bottom surface of the cylindrical tube of the steam heat-exchanging unit, the guarantor
Dan Weiyi cylindrical tubes are defended, the access door for close passage, the steam heat-exchanging unit, storage on the cylindrical tube, is provided with
Hot cell, steam collector unit are arranged in cylindrical tube, and the top surface of the cylindrical tube of the steam heat-exchanging unit extends
To outside cylindrical tube, the lower perforate of the funnel of the steam collector unit is connected with the bottom surface of cylindrical tube.
In such scheme, the cylindrical tube inwall helically rises the fin helical form conduit of form setting, arranges
Several fins in fin helical form conduit, are provided with least one at the top of the cylindrical tube and are shaped as arch
Deep bead, when the deep bead arranges four pieces, every piece of deep bead level of relative position is adjacent position string for string intersects and is
90 °, and every chordal distance center of circle is the 57% of radius length, and its relative altitude is apart from 30 ~ 40mm of top opening for first piece
Position, second piece be apart from the position of 50 ~ 80mm of top opening, the 3rd piece apart from the position of 70 ~ 100mm of top opening, the 4th piece distance top
The position of 130 ~ 160mm of mouth.
In such scheme, the cylindrical tube outer wall arranges at least one contact from top to bottom, and the contact is one ellipse
Circular protrusions, when four contacts are arranged, are respectively in four positive directions in level angle；The shape of four contacts is equal
For ellipse.
In such scheme, at least one electric generator is set from top to bottom in the cylindrical tube body, is sent out when arranging three
During motor, the first generator is located at the top of cylindrical tube at 1/8 distance, and which is 35 °, second with the angle of horizontal plane
Motor is located at the top of cylindrical tube at 2/8 distance, and which is 160 ° with the angle of horizontal plane, and the 3rd generator is located at cylinder
At the top of cylinder at 3/8 distance, the angle of its horizontal plane is 15 °.
In such scheme, the cylindrical tube that the storage tank is set in steam heat-exchanging unit is external, each storage tank correspondence one
Contact is installed, and the bottom of the storage tank is provided for the rail groove for rotating storage tank；When the storage tank is four, four storage tanks it
Between without any connection, and do not contact each other, and four contacts of four storage tanks correspondences and steam heat-exchanging unit
Heat exchange.
In such scheme, between the cylindrical tube and the storage tank of heat storage units of the defendance unit, insulation material is provided with
Layer.
In such scheme, between the heat storage units, steam collector unit, push unit is provided with；The push unit bag
Clockwork spring, the first ball slideway, the second ball slideway, gear train, gear, lower bevel gear that outer shape is bevel gear are included,
Second ball slideway is located at the side of storage tank, and the lower umbrella shape geared sleeve is located on the second ball slideway, the lower umbrella shape
Contact portion of the gear by the access door on the first ball slideway and defendance unit, with steam collector unit below the storage tank
Funnel between arrange outer shape for bevel gear clockwork spring, the storage tank bottom side is provided with tooth bar, the rack and pinion
Group engagement, the outside of the gear train be connected with gear, the gear and the lower bevel gear below the second ball slideway
Engagement.
Compared with prior art, beneficial effects of the present invention：
The present invention is to heat supply well head（Or other heating power type well heads）The steam of generation carries out heating power recovery, according to user's temperature
The difference of degree its rate of recovery up to 55% ~ 85%.And the overall temperature of gas is carried in the steam after absorption be below 35 DEG C,
Wherein moisture overwhelming majority condensation is returned in down-hole.
Description of the drawings
Fig. 1 provides a kind of structural representation of heat supply well head waste-heat recoverer for the embodiment of the present invention；
Rearviews of the Fig. 2 for Fig. 1；
Fig. 3 provides a kind of structural representation of the fin of heat supply well head waste-heat recoverer for the embodiment of the present invention；
Fig. 4 provides a kind of structural representation of the storage tank of heat supply well head waste-heat recoverer for the embodiment of the present invention.
Specific embodiment
The present invention is described in detail with reference to the accompanying drawings and detailed description.
The embodiment of the present invention provides a kind of heat supply well head waste-heat recoverer, as shown in Figure 1, 2, including：Steam heat-exchanging unit
1st, heat storage units 2, defendance unit 3, steam collector unit 4；
The steam heat-exchanging unit 1 includes that cylindrical tube 101,101 inwall of cylindrical tube helically rise form and set
The fin helical form conduit 102 put, several fins 103 being arranged in fin helical form conduit 102, the cylindrical tube
101 top is provided with least one deep bead 104 for being shaped as arch, when the deep bead 104 arranges four pieces, keeps out the wind per block
104 level of relative position of plate is adjacent position string for string and intersects for 90 °, and every chordal distance center of circle is the 57% of radius
Length, its relative altitude for first piece be apart from the position of 30 ~ 40mm of top opening, second piece be apart from the position of 50 ~ 80mm of top opening,
3rd piece apart from the position of 70 ~ 100mm of top opening, the 4th piece apart from the position of 130 ~ 160mm of top opening；
101 outer wall of the cylindrical tube arranges at least one contact 105 from top to bottom, and the contact 105 is one oval
Shape is raised, when four contacts 105 are arranged, is respectively in four positive directions from terms of level angle, its numbering of arranging counterclockwise
Be followed successively by the first contact, the second contact, the 3rd contact, the 4th contact, in four contacts, the first contact for electric energy turn thermal contact its
Temperature highest, the nearest temperature second of the 4th contact distance well head are high, the 3rd contact position time why temperature control three, the 4th contact
Temperature is minimum；First contact flows through generator and electric heating converter using the thermal different type of steam and carries out heat supply to the first contact,
And the second contact, the 3rd contact, the 4th contact are to carry out contact heat transfer by direct and steam to carry out absorption heat.Four
The shape of individual contact is ellipse, height of the most short diameter perpendicular to Part I, most short a diameter of 3 π r/10（R is first
Divide radius）, and area formula F=Q/（K K* △tm）；
At least one electric generator 106 is set from top to bottom in the cylindrical tube 101, when three electric generators of setting
When 106, the first generator is located at the top of cylindrical tube 101 at 1/8 distance, and which is 35 °, second with the angle of horizontal plane
Motor is located at the top of cylindrical tube 101 at 2/8 distance, and which is 160 ° with the angle of horizontal plane, and the 3rd generator is located at circle
At the top of column-shaped barrel 101 at 3/8 distance, the angle of its horizontal plane is 15 °；Three electric generators 106 are first and touch
Point provides energy, also suitably can add and subtract as the case may be, and its quantity can excessively increase cost, and lazy weight is then provided
Heat can have a greatly reduced quality；As vapor (steam) temperature is higher than external environment, a streaming potential upwards is produced, this plume kinetic potential drives
The blade of electric generator 106, makes electric generator 106 produce electric energy, and electric energy produced by electric generator 106 is converted by electric heater again
Into heat energy, be eventually fed to the first contact；As shown in figure 3, second contact, the 3rd contact, the 4th contact are by connection
The centralized heat energy for intercepting is passed to contact by the fin 103 in each section, the fin 103 on each contact it is mutual it
Between be not in contact with, and fin 103 is overall helically rises shape arrangement, tube wall of each fin 103 by cylindrical tube 101
To die direction horizontal extension, and the length of each fin 103 is 15% ~ 85% nothing not etc. of 101 radius of cylindrical tube
Sequence is arranged, distance of the gap between the contact 105, fin 103 for 50 ~ 150mm.
Storage tank 201 of the heat storage units 2 at least one segment, the storage tank 201 are set in steam heat-exchanging unit 1
Cylindrical tube 101 outside, one contact 105 of each storage tank 201 correspondence is installed, and the bottom of the storage tank 201 is provided for rotation
The rail groove of dump groove 201；When the storage tank 201 is four, without any connection between four storage tanks 201, and mutually it
Between do not contact, and four 105 contact heat-exchangings of contact of four storage tanks 201 correspondence and steam heat-exchanging unit 1；First contact correspondence
Position be the first storage tank, the corresponding position in the second contact is the second storage tank, and the corresponding position in the 3rd contact is the 3rd storage tank, the
The corresponding position in four contacts is the 4th storage tank；Due to the first contact of the first storage tank correspondence, so the heat energy of the first storage tank position is most
Height, temperature also highest；The heat energy of the 4th storage tank position takes second place；The heat energy of the 3rd storage tank position is again；The heat of the second storage tank position
Can be minimum, so the storage tank 201 of the first storage tank position is only taken when taking；After the storage tank of the first location of tank is removed,
New storage tank 201 is added, during the storage tank of the first storage tank position being pushed using rail groove, by new the first storage tank position for adding
In storage tank 201 push the second storage tank position, the storage tank 201 of the second storage tank position pushes the 3rd storage tank position, the 3rd storage tank position
The storage tank 201 put pushes the 4th storage tank position, and the storage tank 201 of the 4th storage tank position pushes the first storage tank position, so, is newly put
The storage tank 201 for entering first receives the temperature in low product temperature area, improves successively, finally enters highest warm area and is heated, and pulls away after the full heat of storage
Use.
As shown in figure 4, the material of the inner arc surface of the storage tank 201 is metal or superconductor fibre etc., other parts are modeling
Material, in the storage tank 201 packing material be can heat accumulation phase-change material or other, the phase-change material is fixed on metal grating
On；When making phase-change material filled type metal grating, metal grating is placed in plane, the material of melting is poured into into metal grating
Grid in, after cooling hierarchical sequence pile up filling it is slow after storage tank is sealed and is vacuumized, it is to be assembled, it is little in metal grating
Grid is square little lattice, and the computing formula of its length of side is：（The diameter of the diameter-cylindrical tube 101 of storage tank 201）/KCoefficient,
KCoefficientBy volume size, value determines that the general value of its value is between 21 ~ 74）；Horizontal line and vertical curve on the metal grating
The distance of the 15% ~ 60% or so of every lattice length of side that is staggered between upper each layer and next layer, so, makes internal temperature from contact surface
Degree is more uniform, and can effectively solve the problem that the various problems of phase-change material：1. it is dehydrated after the multiple phase transformation of crystalline hydrate, precipitation
After cause heat storage capacity significantly to decline, What is more can thoroughly lose heat storage capacity, and the intersection that is staggered of metal grating is caused
After phase-change material undergoes phase transition, this just as viscosity is big and the weak molten state material of locomotivity in the passage of entanglement more without
Method flows, i.e., phase-change material while phase transformation in each lattice is relative in a little space, anhydrous while phase transformation
Salt can be fully dissolved in its crystallization water.2. phase change material heat conduction is slow, and phase-change material itself heat conduction is bad（For its material behavior
Determine）, but in grid surrounding metal partion (metp) all can heat conduction, it is possible to making equipment integrally keep well consistent
Property.3. phase-change material is subcooled problem, and supercooling problem is prevalent in the research for wanting to become material, but is sent out by substantial amounts of experiment
It is existing, phase-change material（In addition to formulation challenges）Problem is subcooled in the case where volume more serious, the phase-change material in grid
Itself can so be greatly reduced the generation of supercooling problem in one very narrow space.
The steam collector unit 4 is an inverted funnel, for guiding polymerizing steam, the upper perforate of the funnel and institute
State the bottom surface connection of the cylindrical tube 101 of steam heat-exchanging unit 1.
The defendance unit 3 is a cylindrical tube, and the access door for close passage, institute are provided with the cylindrical tube
State steam heat-exchanging unit 1, heat storage units 2, steam collector unit 4 to be arranged in cylindrical tube, the steam heat-exchanging unit 1
The top surface of cylindrical tube 101 is extended to outside cylindrical tube, the lower perforate of the funnel of the steam collector unit 4 and cylindrical tube
Bottom surface connection, adiabator layer, the insulation material are provided between the cylindrical tube and the storage tank 201 of heat storage units 2
The material of layer selects to need to be obtained according to local environment comprehensive analysis, due to the heat-insulating property difference of various insulation materials,
Advise being used in mixed way with various different insulation material layerings, prove that the species of insulation material is 2 ~ 5 by lot of experimental data
Plant optimum, and be high reflecting rate per two kinds of insulation material fronts, two-layer is pasted for the aluminum plastic film of ater in the back side, such
To greatest extent the storage tank of part 2 can be incubated, wherein high reflecting rate is inward-facing viscous glutinous, and be incubated material and be sticked
The gap of 1 ~ 3cm is left between cylindrical tube inwall, with storage tank 201, the distributing order of this heat insulating material for external is by institute's selection
Descending being glued to 201 direction of storage tank successively from cylindrical tube inwall of thermal conductivity of material is sticked.
Push unit 5 is provided between the heat storage units 2, steam collector unit 4, its effect is to pick and place heat storage units
Slideway is provided for which during the storage tank of 2 the first storage tank position, and storage picks and places the push-and-pull potential energy of heat storage units 2, it is single in defendance
During first 3 access doors closure unblock, storage tank 201 is promoted to slide into specified slot position using storage potential energy.
The push unit 5 includes the clockwork spring 501 that outer shape is bevel gear, the first ball slideway 504, the second ball
Slideway 505, gear train 502, gear 503, lower bevel gear 506, second ball slideway 505 are located at the side of storage tank 201,
The lower bevel gear 506 is set on the second ball slideway 505, and the lower bevel gear 506 passes through the first ball slideway 504
With the contact portion of the access door on defendance unit 3, arrange and the funnel of steam collector unit 4 between below the storage tank 201
Clockwork spring 501 of the outer shape for bevel gear, 201 bottom side of the storage tank is provided with tooth bar 202, the tooth bar 202 and gear train
502 engagements, the outside of the gear train 502 is connected with gear 503, the gear 503 with below the second ball slideway 505
Lower bevel gear 506 engage.
The course of work of the push unit 5 is as follows：1. access door is opened, transmits the force to be fixed on using tie point
Connecting rod on one ball slideway 504, drives the lower bevel gear 506 being fixed on the second ball slideway 505 to drop to from location A
B location；2. gear 503 and clockwork spring 501 are linked with the lower bevel gear 506 for being slid to B location；3. storage tank 201 is pulled, due to
Tooth bar 202 is all arranged at 201 bottom of storage tank, and the rotation of gear train 502, but gear train 502 can be driven when sliding using tooth bar 202 to be all
The gear of individual event bearing is studded with, when pulling storage tank 201,502 institute's band bearing of gear train is consistent with pull direction active force, so this
When do not produce active force；4. change storage tank 201；5. storage tank 201 is pushed, now 502 institute's band bearing of gear train and active force are phase
Reverse direction, is mutually rotated between gear, and revolving force is passed to gear 503；6. the gear train 502 rotates, by place
Transfer the force in the lower bevel gear 506 of B location outside for clockwork spring 501；7. the clockwork spring 501 is produced due to rotation
Potential energy；8. access door is closed, the lower bevel gear 50 being now on the second ball slideway 505 rises to location A from B location
Afterwards, storage tank is pushed to into relevant position after device unblock.
The above, only presently preferred embodiments of the present invention is not intended to limit protection scope of the present invention.
Claims (7)
1. a kind of heat supply well head waste-heat recoverer, it is characterised in that the recover includes：Steam heat-exchanging unit（1）, heat storage units
（2）, defendance unit（3）, steam collector unit（4）；The steam heat-exchanging unit（1）Including cylindrical tube（101）, the storage
Hot cell（2）For the storage tank of at least one segment（201）, the storage tank（201）It is set in cylindrical tube（101）Outward, institute
State steam collector unit（4）For the funnel of an inverted guiding polymerizing steam, upper perforate and the steam heat-exchanging of the funnel
Unit（1）Cylindrical tube（101）Bottom surface connection, the defendance unit（3）For a cylindrical tube, on the cylindrical tube
It is provided with the access door for close passage, the steam heat-exchanging unit（1）, heat storage units（2）, steam collector unit（4）
It is arranged in cylindrical tube, the steam heat-exchanging unit（1）Cylindrical tube（101）Top surface extend to outside cylindrical tube,
The steam collector unit（4）The lower perforate of funnel be connected with the bottom surface of cylindrical tube.
2. heat supply well head waste-heat recoverer according to claim 1, it is characterised in that：The cylindrical tube（101）It is interior
Wall helically rises form and is provided with fin helical form conduit（102）, the fin helical form conduit（102）Inside it is provided with some
Individual fin（103）, the cylindrical tube（101）Top be provided with least one deep bead for being shaped as arch（104）, institute
State deep bead（104）When arranging four pieces, every piece of deep bead（104）Level of relative position is adjacent position string for string intersects and is
90 °, and every chordal distance center of circle is the 57% of radius length, and its relative altitude is apart from 30 ~ 40mm of top opening for first piece
Position, second piece be apart from the position of 50 ~ 80mm of top opening, the 3rd piece apart from the position of 70 ~ 100mm of top opening, the 4th piece distance top
The position of 130 ~ 160mm of mouth.
3. heat supply well head waste-heat recoverer according to claim 1 and 2, it is characterised in that：The cylindrical tube（101）
Outer wall arranges at least one contact from top to bottom（105）, the contact（105）For an elliptical shaped lobes, when arranging four contacts
（105）When, it is respectively in four positive directions in level angle；The shape of four contacts is ellipse.
4. heat supply well head waste-heat recoverer according to claim 3, it is characterised in that：The cylindrical tube（101）It is interior
At least one electric generator is set from top to bottom（106）, when three electric generators of setting（106）When, the first generator is located at circle
Column-shaped barrel（101）At the distance at top 1/8, which is 35 ° with the angle of horizontal plane, and the second generator is located at cylindrical tube
（101）At the distance at top 2/8, which is 160 ° with the angle of horizontal plane, and the 3rd generator is located at cylindrical tube（101）Top
At 3/8 distance, the angle of its horizontal plane is 15 °.
5. heat supply well head waste-heat recoverer according to claim 4, it is characterised in that：The storage tank（201）It is set in steaming
Vapour heat exchange unit（1）Cylindrical tube（101）Outward, each storage tank（201）One contact of correspondence（105）Install, the storage tank
（201）Bottom be provided for rotate storage tank（201）Rail groove；When the storage tank（201）For four when, four storage tanks
（201）Between without any connection, and do not contact each other, and four storage tanks（201）Correspondence and steam heat-exchanging unit（1）
Four contacts（105）Contact heat-exchanging.
6. heat supply well head waste-heat recoverer according to claim 5, it is characterised in that：The defendance unit（3）Cylinder
Cylinder and heat storage units（2）Storage tank（201）Between be provided with adiabator layer.
7. heat supply well head waste-heat recoverer according to claim 6, it is characterised in that：The heat storage units（2）, steam receive
Collection unit（4）Between be provided with push unit（5）；The push unit（5）Including the clockwork spring that outer shape is bevel gear
（501）, the first ball slideway（504）, the second ball slideway（505）, gear train（502）, gear（503）, lower bevel gear
（506）, second ball slideway（505）Positioned at storage tank（201）Side, the lower bevel gear（506）It is set in second
Ball slideway（505）On, the lower bevel gear（506）By the first ball slideway（504）With defendance unit（3）On passage
The contact portion of door, the storage tank（201）Lower section and steam collector unit（4）Funnel between arrange outer shape be umbrella shape tooth
The clockwork spring of wheel（501）, the storage tank（201）Bottom side is provided with tooth bar（202）, the tooth bar（202）With gear train（502）Nibble
Close, the gear train（502）Outside and gear（503）Connection, the gear（503）With positioned at the second ball slideway（505）
The lower bevel gear of lower section（506）Engagement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510335820.0A CN104990292B (en) | 2015-06-17 | 2015-06-17 | Heat supply well head waste-heat recoverer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510335820.0A CN104990292B (en) | 2015-06-17 | 2015-06-17 | Heat supply well head waste-heat recoverer |
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| CN104990292A CN104990292A (en) | 2015-10-21 |
| CN104990292B true CN104990292B (en) | 2017-03-29 |
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| CN107120985B (en) * | 2016-02-24 | 2019-10-29 | 中国石油化工股份有限公司 | Cooling device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1892145A (en) * | 2005-10-04 | 2007-01-10 | 庞立升 | Split self-circulation solar heat energy apparatus |
| CN201827962U (en) * | 2010-10-11 | 2011-05-11 | 崔博然 | Closed pipeline system for reusing hot steam |
| CN202281419U (en) * | 2011-10-15 | 2012-06-20 | 太原炬能再生能源供热有限公司 | Mine ventilation air and waste heat utilization device |
| EP2669514A1 (en) * | 2011-01-30 | 2013-12-04 | Yuqi Chen | Solar heat storage and high temperature gas generating system with working medium being flowing sand |
| CN103574734A (en) * | 2013-11-12 | 2014-02-12 | 江苏大学 | Nuclear energy heating system based on loop heat pipe heat dissipation |
-
2015
- 2015-06-17 CN CN201510335820.0A patent/CN104990292B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1892145A (en) * | 2005-10-04 | 2007-01-10 | 庞立升 | Split self-circulation solar heat energy apparatus |
| CN201827962U (en) * | 2010-10-11 | 2011-05-11 | 崔博然 | Closed pipeline system for reusing hot steam |
| EP2669514A1 (en) * | 2011-01-30 | 2013-12-04 | Yuqi Chen | Solar heat storage and high temperature gas generating system with working medium being flowing sand |
| CN202281419U (en) * | 2011-10-15 | 2012-06-20 | 太原炬能再生能源供热有限公司 | Mine ventilation air and waste heat utilization device |
| CN103574734A (en) * | 2013-11-12 | 2014-02-12 | 江苏大学 | Nuclear energy heating system based on loop heat pipe heat dissipation |
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| CN104990292A (en) | 2015-10-21 |
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