CN1230674A - Thermoelectric rifrigerator with conducting beat pipe to dissipate heat - Google Patents
Thermoelectric rifrigerator with conducting beat pipe to dissipate heat Download PDFInfo
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- CN1230674A CN1230674A CN98101096A CN98101096A CN1230674A CN 1230674 A CN1230674 A CN 1230674A CN 98101096 A CN98101096 A CN 98101096A CN 98101096 A CN98101096 A CN 98101096A CN 1230674 A CN1230674 A CN 1230674A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
Abstract
The thermoelectric refrigerator consists mainly of heat-pipe conducting board and heat-pipe heat exchanger, the former is installed at the cold end of the thermoelectric refrigerator assembly and has several bundles of heat pipes converging to the condensator, and the latter is installed at the heat end of the thermoelectric refrigerator assembly and has several bundles of heat pipes with fins converging to the evaporator. The efficient phase change and heat conduction of heat pipe and working medium results in fast cooling and heat dissipation, and this reduces the heat exchange caused by temperature focusing in the cold and the heat ends and makes the refrigerator operate in minimum temperature difference for maximum refrigerating amount.
Description
Thermoelectric (al) cooling is on the Peltier effect basis, utilizes two kinds of electronics and the potential variation that produces in power circuit of hole and heat absorption, exothermic phenomenon in the conductor, form cool and heat ends, and then realizes refrigeration (pyrogenicity) performance.Because have electric current can produce Joule heat by thermoelectric couple during the refrigerating assembly operation, the temperature in hot junction also will be imported cold junction into simultaneously, so under thermal equilibrium state, the equation of heat balance of cold junction is:
Q
c＝a
pnT
cI-0.5I
2R-K(T
n-T
c)
Be that the refrigerating capacity of cold junction equals the Peltier cold that cold junction produces and deducts 1/2 Joule heat of bringing cold junction into, deduct again and import the heat of cold junction into by the hot junction by the decision of Fuli's leaf heat conduction law.And by the following formula derivation as can be known, under the prerequisite that does not change thermoelectric couple material and heat loss through conduction mode, when cold and hot end reached maximum temperature difference, refrigerating capacity and refrigeration coefficient all leveled off to zero.This shows, improve refrigeration performance, except selecting suitable operating current and electrical power, reduce relatively and bring into beyond the Joule heat of cold junction, the more important thing is the heat loss through conduction mode of improving thermoelectric cooling module, reduce the heat exchange that cold and hot end Yin Wendu accumulation forms, reduce the temperature difference at two ends to greatest extent, could obtain maximum refrigerating capacities.Therefore, research and develop high efficiency heat loss through conduction device,, improve freezing capacity, enlarge the refrigeration volume, make it to be extremely important in more field extensive use for the condition of work of improving thermoelectric cooling module.
The thermoelectric refrigerator of widely using is made up of thermoelectric cooling module, refrigeration conduction device and hot end heat sink three parts usually at present.Wherein thermoelectric cooling module is generally made with semi-conducting material; The refrigeration conduction device adopts finned radiator or large-area metal plate structure; Hot end heat sink adopts that radiator is natural air cooled, fan is forced cooling, interior circulation nature water-cooled, outer circulation Forced water cooling and utilize several modes such as material endothermic reaction cooling.By a large amount of research with experimental results show that: with the heat loss through conduction device (as Fig. 1, Fig. 2) that metal material is made, the coefficient of heat transfer only is 3～8w/ (m
2K); The auxilliary fan that adds is forced cooling, also can only reach 26～30w/ (m
2K): and because the existence of material thermal resistance, effective conduction surface being only limited to the thermal source be the 150～180mm at center is within the radius, surpasses this scope heat conductivility and obviously decays.Though the coefficient of heat transfer of recirculated water cooling can reach 110～170w/ (m in adopting
2K), but need bigger circulation area and environment to carry out heat exchange, and difficulty of processing is bigger, divulges easily and corrosion in installing and using; Outer circulation water-cooled (as Fig. 4) be with the heat radiation recirculated water import and export be communicated with the water source that pressure is arranged, by walking heat with the tape loop at extraneous water source, the coefficient of heat transfer of this mode can reach 150-1000w/ (m
2K), but must be furnished with corresponding water source or water pump when using, be restricted to the range of application that makes product.Utilize the material melting heat in addition in addition, the heat abstractor that substance dissolves heat and material thermal capacity are cooled off, because conduction device is had corrosivity, radiating effect lacks continuity and stability, so extensively do not adopt as yet.Therefore, develop high efficiency heat loss through conduction device, be still in the thermoelectric (al) cooling technical development one and important topic anxious to be solved.
The objective of the invention is to design a kind of thermoelectric refrigerator by heat pipe for conductive heat dissipation.It mainly is made up of heat pipe conductive plate that is installed in the thermoelectric cooling module cold junction and the heat-pipe radiator that is installed in the refrigerating assembly hot junction.The temperature that makes cold and hot end is undertaken high efficiencyly distributing and conducting by heat pipe, reduces the heat exchange that causes because of the two ends heat accumulation, makes it to be operated under the minimum temperature difference state, to obtain maximum refrigerating capacity.
The thermoelectric refrigerator of employing heat pipe for conductive heat dissipation of the present invention, description of drawings is as follows:
Fig. 1 is the thermoelectric refrigerator schematic diagram that adopts rib shape radiator heat loss through conduction in the refrigerator of guest room.
Fig. 2 is that cold junction adopts the conduction of large-area metal plate in the car refrigerator; The thermoelectric refrigerator schematic diagram of round needle shape radiator heat loss through conduction is adopted in the hot junction.
Fig. 3 is that cold junction adopts the conduction of rib shape radiator in the refrigerating box; The thermoelectric refrigerator schematic diagram of inner loop nature water-cooled is adopted in the hot junction.
Fig. 4 is that cold junction adopts the conduction of round needle shape radiator in the refrigerating box; The thermoelectric refrigerator schematic diagram of outer loop Forced water cooling is adopted in the hot junction.
Fig. 5 is the refrigeration conduction device structural representation of the thermoelectric refrigerator of employing heat pipe for conductive heat dissipation.
Fig. 6 is the hot end heat sink structural representation of the thermoelectric refrigerator of employing heat pipe for conductive heat dissipation.
Fig. 7 is for adopting the thermoelectric refrigerator installation diagram of heat pipe for conductive heat dissipation.
Adopt the thermoelectric refrigerator schematic diagram of gravity assisted heat pipe heat loss through conduction in the refrigerator of Fig. 8 guest room.
Adopt the thermoelectric refrigerator schematic diagram that the core heat pipe for conductive heat dissipation is arranged in Fig. 9 car refrigerator.
Adopt the thermoelectric refrigerator schematic diagram of permeable pressure head heat pipe for conductive heat dissipation in Figure 10 refrigerating box.
In the accompanying drawing: 1-thermoelectric cooling module; 2-trapezoidal refrigerating block; 3-trapezoidal condensation chamber; 4-heat pipe conductive plate; 5-trapezoidal vaporization chamber; 6-heat-pipe radiator; 7-body fuselage.
The thermoelectric refrigerator of employing heat pipe for conductive heat dissipation of the present invention, its technical scheme mainly comprises: (one) refrigeration conduction device.Form (as Fig. 5) by thermoelectric cooling module 1, the trapezoidal refrigerating block 2 that is installed in the thermoelectric cooling module cold junction, the heat pipe conductive plate 4 that multi beam comes together in trapezoidal condensation chamber 3 that is furnished with that is fixed on the trapezoidal refrigerating block; (2), hot end heat sink.By the multi beam that is installed in thermoelectric cooling module 1 hot junction have fin or wing bar and come together in the heat exchange of heat pipe 6 of trapezoidal vaporization chamber 5, the body fuselage 7 that is connected the heat-pipe radiator periphery is formed (as Fig. 6).Adopt the thermoelectric refrigerator (as Fig. 7) of heat pipe for conductive heat dissipation to adopt heat pipe combining form conduction heat exchange, its operation principle is: heat pipe is after the heating of the hot junction of thermoelectric cooling assembly, the former working medium that charges in the pipe is gasified because of absorbing external heat, and at the dirty other end of faint pressure reduction to heat pipe, while is carried out heat exchange with environment of living in, emits heat and lower the temperature to the external world to be condensed into liquid.Liquid returns fire end (in gravity-type heat pipe, owing to do not have the imbibition core in the tube chamber, liquid relies on self gravitation to reflux) by the capillary force of adherent wire netting, and the gasification of being heated once more.Circulation so repeatedly, continuously the heat with fire end is transmitted to the other end fast.This high efficiency conduction is by being deformed into mutually of heat-pipe working medium, so the thermal resistance of inside heat pipe is very low, can obtain high thermal conductivity under the less temperature difference and isothermy.According to the interrelated data verification, under uniform temperature and area condition, the thermal conductivity of heat pipe is equivalent to 40～10000 times of copper, is the high device of a kind of heat transfer efficiency.(the refrigeration conduction device is a thermal source with the refrigeration space just, has fire end to absorb heat, and after the working medium of gasification was imported colling end into, by thermoelectric cooling module cooling condensation, operation principle was identical.)
The implementation method of the thermoelectric refrigerator of employing heat pipe for conductive heat dissipation of the present invention is: at first determine the cold and hot end maximum temperature difference of thermoelectric cooling module, according to the temperature range in cold junction and hot junction, select suitable heat-pipe working medium then.For heat pipe is operated under the good state, working medium must be gas--the liquid two states, and the molten point of selected working medium should be lower than the operating temperature of heat pipe; And critical point must be higher than the operating temperature of heat pipe.To consider simultaneously whether working medium and heat pipe shell and imbibing core material material be compatible.In case because housing or imbibition core and working medium generation chemical reaction, or working medium itself is decomposed, and will produce incoagulable gas.Chemical reaction also can corrode housing or imbibition core, and properties of hot pipe is degenerated, and reduces the life-span even can not work.Working medium determines that the back just can be according to the temperature and the working medium evaporation rate at thermoelectric cooling assembly two ends, circulation route, syndeton and the work area of design heat pipe conductive plate and heat exchange of heat pipe.Wherein the caliber of Cai Yonging, end cap, syndeton need be checked by operating pressure, and clear and definite maximal work state, keep certain safety coefficient.On structure and technology, the heat pipe cold transmission plate generally adopts double-deck pure aluminum plate hot pressing to propel the price of shaping, also can adopt the double-layer plate roll welding of colding pressing to be shaped this structure, technical maturity, sealing is reliable, just can bear bigger operating pressure with materials with smaller thickness, not only thermal resistance is little, conduction efficiency is high, and the intensive various forms of circulating lines of can arranging, strengthening heat exchanger effectiveness, is refrigeration conducting structure desirable in the various thermoelectric refrigerators.
Heat-pipe radiator can adopt finned tube to combine, and also can adopt the multi beam metal tube that is welded with the wing bar to make, and preferably adopts radial pipeline with being communicated with of vaporization chamber, to reduce circulation resistance, increases the gasification flow.
When design and manufacturing heat pipe conductive plate and heat exchange of heat pipe, should reduce weld bond as far as possible, and forbid using and the inconsistent auxiliary material welding of working medium, to prevent working medium infiltration and local corrosion.Before filling working medium, should do excess load with its maximal work pressure earlier and carry the pressure test, gentle by piping volume then--liquid proportional (being generally 10～20%) fills working medium.
The thermoelectric refrigerator of employing heat pipe for conductive heat dissipation of the present invention, illustrative example is as follows:
Example 1 is used for the guest room refrigerator.Adopt the thermoelectric refrigerator (as Fig. 8) of gravity assisted heat pipe heat loss through conduction, cold junction adopts the heat pipe cold transmission plate that propels the price of shaping; The hot junction adopts multi beam to have the heat-pipe radiator of wing bar.
Example 2 is used for car refrigerator.Employing has the thermoelectric refrigerator (as Fig. 9) of core heat pipe for conductive heat dissipation.Cold junction adopts hot pressing to propel the price of the heat pipe conductive plate of shaping; The hot junction is adopted and to be had the heat-pipe radiator that imbibition core, external diameter have fin in the multibeam tube.This have the working medium in the core heat pipe to return fire end by capillary force, is not subjected to the restriction of gravity direction, can enlarge the heat pipe area under fire end, the deficiency on the compensation complete machine structure.
Example 3 is to be used for refrigerating box.Adopt the thermoelectric refrigerator (as Figure 10) of permeable pressure head heat pipe for conductive heat dissipation.Cold junction adopts hot pressing to propel the price of the heat pipe cold transmission plate of shaping; Permeable pressure head type heat exchange of heat pipe is adopted in the hot junction.This heat pipe can utilize the pressure reduction on permeable membrane both sides, the condensate liquid of working medium is delivered to higher bringing-up section with lower cooling section " pump ", thereby cooling tube is moved down, can utilize heat-dissipating space to greatest extent, in the arrangement of complete machine structure, have bigger practicality and flexibility.
In sum, the thermoelectric refrigerator of employing heat pipe for conductive heat dissipation of the present invention, the cold conductive performance of the utilization high efficiency heat of heat pipe, can quicken the high low temperature conduction of thermoelectric cooling module, reduce the thermal accumlation and the heat exchange of cold and hot end, dwindle the two ends temperature difference, improve freezing capacity.Not only the intention science, rational in infrastructure, technology is reliable, and have that cost is low, practical, stable performance, characteristics such as durable in use, can be widely used in multiple thermoelectric (al) cooling equipment and product.
Claims (3)
1. one kind is used for thermoelectric refrigerator various thermoelectric (al) cooling equipment and product, that adopt heat pipe for conductive heat dissipation, it is characterized in that:
(1) by thermoelectric cooling module, be installed in the thermoelectric cooling module cold junction the trapezoidal refrigerating block of hollow, be fixed on the trapezoidal refrigerating block and be furnished with multi beam and come together in the refrigeration conduction device that the heat pipe conductive plate of the trapezoidal condensation chamber of hollow is formed;
(2) have fin or wing bar by the multi beam that is installed in the thermoelectric cooling module hot junction and come together in the trapezoidal vaporization chamber of hollow heat exchange of heat pipe, be connected the hot end heat sink that the body fuselage of heat exchange of heat pipe periphery is formed.
2. press the thermoelectric refrigerator of the described employing heat pipe for conductive heat dissipation of claim 1, it is characterized in that: the heat pipe conductive plate in the described refrigeration conduction device adopts doubling plate hot pressing to propel the price of or the roll welding technology of colding pressing forms, and each heat pipe circulating line all comes together in the trapezoidal condensation chamber of hollow of projection.
3. by the thermoelectric refrigerator of the described employing heat pipe for conductive heat dissipation of claim 1, it is characterized in that: each heat pipe circulating line of the heat exchange of heat pipe in the described hot end heat sink all comes together in the trapezoidal vaporization chamber of hollow of projection.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98101096A CN1077676C (en) | 1998-03-30 | 1998-03-30 | Thermoelectric rifrigerator with conducting beat pipe to dissipate heat |
| US09/647,385 US6351951B1 (en) | 1998-03-30 | 1999-03-30 | Thermoelectric cooling device using heat pipe for conducting and radiating |
| PCT/CN1999/000040 WO1999050604A1 (en) | 1998-03-30 | 1999-03-30 | Thermoelectric cooling device using heat pipe for conducting and radiating |
| AU30225/99A AU3022599A (en) | 1998-03-30 | 1999-03-30 | Thermoelectric cooling device using heat pipe for conducting and radiating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98101096A CN1077676C (en) | 1998-03-30 | 1998-03-30 | Thermoelectric rifrigerator with conducting beat pipe to dissipate heat |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1230674A true CN1230674A (en) | 1999-10-06 |
| CN1077676C CN1077676C (en) | 2002-01-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98101096A Expired - Fee Related CN1077676C (en) | 1998-03-30 | 1998-03-30 | Thermoelectric rifrigerator with conducting beat pipe to dissipate heat |
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| Country | Link |
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| CN (1) | CN1077676C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100419355C (en) * | 2003-01-24 | 2008-09-17 | 伊库瑞莱伯控股有限公司 | Cooling device of hybrid-type |
| CN101056528B (en) * | 2007-04-29 | 2012-12-12 | 华为技术有限公司 | Cooling device, heating device and communication device |
| CN104344641A (en) * | 2014-08-29 | 2015-02-11 | 青岛海尔股份有限公司 | Semiconductor cooling refrigerator and hot-end heat exchange device for same |
-
1998
- 1998-03-30 CN CN98101096A patent/CN1077676C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100419355C (en) * | 2003-01-24 | 2008-09-17 | 伊库瑞莱伯控股有限公司 | Cooling device of hybrid-type |
| CN101056528B (en) * | 2007-04-29 | 2012-12-12 | 华为技术有限公司 | Cooling device, heating device and communication device |
| CN104344641A (en) * | 2014-08-29 | 2015-02-11 | 青岛海尔股份有限公司 | Semiconductor cooling refrigerator and hot-end heat exchange device for same |
| CN104344641B (en) * | 2014-08-29 | 2017-01-18 | 青岛海尔股份有限公司 | Semiconductor cooling refrigerator and hot-end heat exchange device for same |
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| Publication number | Publication date |
|---|---|
| CN1077676C (en) | 2002-01-09 |
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