CN202582301U - Pulsating heat pipe heat-transfer system sleeved with electronic control piezoelectric ceramic block - Google Patents
Pulsating heat pipe heat-transfer system sleeved with electronic control piezoelectric ceramic block Download PDFInfo
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- CN202582301U CN202582301U CN 201220137553 CN201220137553U CN202582301U CN 202582301 U CN202582301 U CN 202582301U CN 201220137553 CN201220137553 CN 201220137553 CN 201220137553 U CN201220137553 U CN 201220137553U CN 202582301 U CN202582301 U CN 202582301U
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- heat pipe
- pulsating heat
- pulsating
- transfer system
- piezoelectric ceramics
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- 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
- F28D15/0266—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 with separate evaporating and condensing chambers connected by at least one conduit; Loop-type heat pipes; with multiple or common evaporating or condensing chambers
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The utility model provides a pulsating heat pipe heat-transfer system sleeved with an electronic control piezoelectric ceramic block. The pulsating heat pipe heat-transfer system comprises a pulsating heat pipe 1 filled with a working medium 2. The pulsating heat pipe 1 is divided into an evaporating region I, an adiabatic region II and a condensing region III from bottom to top. The pulsating heat pipe heat-transfer system is characterized in that an electronic control piezoelectric ceramic block 3 is sleeved on the pulsating heat pipe 1. The size and the frequency of voltage applied on the electronic control piezoelectric ceramic block 3 can be adjusted. The pulsating heat pipe heat-transfer system has the following advantages that piezoelectric ceramic can generate ultrasonic wave with different frequencies and strengths by controlling the magnitude and the frequency of the voltage loaded on the piezoelectric ceramic, so that the heat transfer performance when the pulsating heat pipe is started and normally runs can be controlled. The starting power of the pulsating heat pipe can be reduced, and the application limit of the pulsating heat pipe under the condition of low power can be removed. The heat transfer thermal resistance of the pulsating heat pipe can be reduced by adopting a cavitation principle, and the heat transfer performance when the pulsating heat pipe normally works can be enhanced. The used material is common, and low in manufacturing cost. The pulsating heat pipe heat-transfer system is convenient to manufacture, simple to use, and high in realistic operability and application prospect.
Description
Technical field the utility model relates to a kind of automatically controlled pulsating heat pipe heat transfer system, belongs to heat exchange, refrigeration technology field.
Background technology is along with the continuous development of electronics technology, and densification and miniaturization because of high frequency, high speed and the integrated circuit of electronic component cause the heating power of unit volume electronic device significantly to increase, thereby make its cooling problem become severe day by day.Pulsating heat pipe has that volume is little, equivalent heat conductivity is big, simple in structure, advantage such as pattern is various, thereby is widely used in electronic devices and components cooling field as a kind of high efficiency and heat radiation element.Pulsating heat pipe repeatedly passes evaporation ends by a capillary and condensation end is processed, shape such as snakelike.Be filled with working fluid in the capillary, form vent plug and liquid plug.During work, working fluid evaporates at evaporation ends in the pipe, and in the condensation end condensation, this will cause capillary to produce pressure differential at condensation end and fire end, and this pressure differential makes working fluid in pulsating heat pipe, flow fast.Phase transformation and forced convertion effect owing to working fluid in this process make heat be delivered to condensation end from fire end effectively.Because the pulsation of pulsating heat pipe restriction, it starts the problem of difficulty, with and job insecurity under low power condition, limited the application of pulsating heat pipe under the low-power input state.
Ultrasonic wave is meant the elastic wave that the higher object of vibration frequency is produced in medium, its frequency range is 20kHz～10MHz.Large amplitude, low-frequency ultrasonic energy are concentrated, can be made medium produce high vibration, strengthening fluid flows and conducts heat.And ultrasonic wave can cause cavitation effect.Cavitation effect is meant the small complex that is present in the liquid under the ultrasonic wave effect, experiences ultrasonic sparse phase and compresses mutually volume growth, contraction, regrowth, contraction again, repeatedly cycle row vibration, the final dynamic process that breaks at a high speed.Temperature is up to 5200K in the measuring, complex, and pressure is up to 5.05 * 10
7Pa, (complex liquid phase layer thickness is that 200～300nm) temperature also can be up to 1900K around the complex in the minimum spatial dimension.Because the time compole short (less than 10um) that this localized hyperthermia, condition of high voltage exist; So rate of temperature change can be up to 109K/s; And with strong shock wave and the speed per hour microjet up to 400km/h, this is with regard to under general condition to be difficult to realize that the physical-chemical reaction that maybe can not realize provides a kind of extreme condition.The cavitation reaction mainly occurs in the intermediate frequency range of 20kHz～1000kHz.
Piezoelectric ceramics is a kind of material with piezo-electric effect, is a kind ofly can mechanical energy and the electric energy ceramic material of conversion mutually be belonged to Inorganic Non-metallic Materials.Piezoelectric ceramics is the drive source of ultrasonic vibration, and through extra electric field control, piezoelectric ceramics can produce the vibration of different frequency, thereby sends the sound of various different frequencies, wherein just comprises ultrasonic wave.Use piezoelectric ceramics to be made into ultrasonic transducer; Can be converted into mechanical energy to high-frequency electrical energy; Ultrasonic transducer is as the power conversion device, and its function is to convert the electrical power of importing to mechanical output (being ultrasonic wave) to pass again, and its autophage a part of power seldom.
The technical problem that utility model content the utility model will solve is; Through a kind of technological means; Make the TRANSFER BY PULSATING FLOW of pulsating heat pipe and heat transfer property is controlled and strengthen, reduce the pulsation restriction of pulsating heat pipe, and solve the problem that pulsating heat pipe starts difficulty; Reduce the needed input power of startup of pulsating heat pipe, improve the stability that pulsating heat pipe is worked under low power condition, remove the application restriction of pulsating heat pipe under the low-power input.In addition, control and the heat transfer property of reinforcement pulsating heat pipe when operate as normal.For addressing the above problem; The utility model proposes following technical scheme: a kind of pulsating heat pipe heat transfer system that is with automatically controlled piezoelectric ceramics block, comprise the pulsating heat pipe that is filled with working medium, and this pulsating heat pipe is divided into evaporating area I from bottom to top successively; Adiabatic region II, condensing zone III.Its feature is: on this pulsating heat pipe 1, be with automatically controlled piezoelectric ceramics block 3.
Automatically controlled piezoelectric ceramics block 3 can be enclosed within described evaporating area I, also can be enclosed within adiabatic region II or condensing zone III.The quantity of suit can make up as required in evaporating area I, adiabatic region II, condensing zone III.The voltage swing that applies on the automatically controlled piezoelectric ceramics block 3 is adjustable.The adjustable voltage scope is 5 volts～1000 volts.The electric voltage frequency that applies on the automatically controlled piezoelectric ceramics block 3 is adjustable.The electric voltage frequency scope that applies is 50Hz～2MHz.The electric voltage frequency optimum range that applies is 1kHz～1000kHz.
Adopted the pulsating heat pipe heat transfer system that is with automatically controlled piezoelectric ceramics block of above technical scheme; Compare with traditional pulsating heat pipe heat transfer unit (HTU); Has following advantage: the size and the frequency that are carried in the voltage on the piezoelectric ceramics through control; Frequency of ultrasonic and intensity that piezoelectric ceramics is produced are controlled, thereby the heat transfer property when making startup and the operate as normal of pulsating heat pipe is controlled.In addition,, can reduce the starting power of pulsating heat pipe, remove the application restriction of pulsating heat pipe under low power condition because ultrasonic wave and pulsating heat pipe that piezoelectric ceramics produces are united use.Adopt the cavitation principle can also reduce the heat transfer resistance of pulsating heat pipe, strengthen the heat transfer property of pulsating heat pipe when operate as normal.The various materials of being selected for use are common common, and are cheap.Easy to make, use simple.
Description of drawings Fig. 1 is a kind of structural representation that is with the pulsating heat pipe heat transfer system of automatically controlled piezoelectric ceramics block of the utility model.
The specific embodiment explains further details to the utility model below in conjunction with accompanying drawing.As can be seen from Figure 1, the same pulsating heat pipe 1, evaporating area I, adiabatic region II, the condensing zone III of being provided with of the utility model with common pulsating heat pipe heat transfer unit (HTU); Internal working medium 2.The utility model is with the general common different part of pulsating heat pipe: at evaporating area I, and adiabatic region II, condensing zone III place is with automatically controlled piezoelectric ceramics block 3.Automatically controlled piezoelectric ceramics block 3 also can all have installation in described evaporating area (I), adiabatic region (II), condensing zone (III).The quantity of in each zone, installing can make up as required.
Use automatically controlled piezoelectric ceramics block 3 to produce ultrasonic wave, and this ultrasonic wave is incorporated in pulsating heat pipe 1 heat transfer unit (HTU), utilize hyperacoustic cavitation effect to strengthen the performance of pulsating heat pipe.Be characterized in: the voltage swing and the frequency that are carried in the signal of telecommunication on the piezoelectric ceramics through extra electric field control; The scope of this voltage is 5V～1000V; The scope of this frequency is 50Hz～2MHz, can control the ultrasonic wave that piezoelectric ceramics produces varying strength, different frequency, and utilize this hyperacoustic cavitation effect; Control is also strengthened pulsating heat pipe internal working medium 2 mobile and heat transfer properties, and utilize the startup of ultrasonic wave control pulsating heat pipe 1 and the heat transfer property of operate as normal.When the electric voltage frequency that applies was 1kHz～1000kHz, the ultrasonic wave that is produced was the most remarkable to the control and the invigoration effect of pulsating heat pipe TRANSFER BY PULSATING FLOW and heat transfer.
The material of pulsating heat pipe 1: can adopt copper, aluminium, carbon steel, stainless steel, steel alloy and other metals, also can adopt nonmetallic materials such as pottery, glass or plastics.The shape of pulsating heat pipe 1 can be closed loop tubular type pulsating heat pipe, open loop tubular type pulsating heat pipe etc.The curved number of the passage of pulsating heat pipe 1 can be confirmed according to actual needs, can be single tube or multitube.The cross section of pulsating heat pipe 1 can be a standard circular, also can be oval, and square, rectangle, pancake, corrugated etc.Pulsating heat pipe 1 inside charges working medium 2 and can be water, also can be compound and various nano-fluids such as alcohol, acetone, methyl alcohol, fluorohydrocarbon, micron fluid etc.
The material of piezoelectric ceramics block 3: can be the Ca-Ti ore type piezoceramic material, like lead titanates (PbTiO3), also can be binary system PbZrO3-PbTiO3 piezoelectric ceramics (being called for short PZT) and ternary system Ca-Ti ore type piezoelectric ceramics etc.For the tubular type pulsating heat pipe, the shape of piezoelectric ceramics block 3 satisfies in it ring size and can be located on the pulsating heat pipe outer wall that matches and get final product.Piezoelectric ceramics block 3 outer peripheral shape are not limit, circular, square all can, and thickness can determine as required.
Claims (7)
1. pulsating heat pipe heat transfer system that is with automatically controlled piezoelectric ceramics block; Comprise the pulsating heat pipe (1) that is filled with working medium (2); This pulsating heat pipe (1) is divided into evaporating area (I) from bottom to top successively; Adiabatic region (II), condensing zone (III) is characterized in that: on this pulsating heat pipe (1), be with automatically controlled piezoelectric ceramics block (3).
2. the pulsating heat pipe heat transfer system that is with automatically controlled piezoelectric ceramics block according to claim 1 is characterized in that: automatically controlled piezoelectric ceramics block (3) is enclosed within described evaporating area (I).
3. the pulsating heat pipe heat transfer system that is with automatically controlled piezoelectric ceramics block according to claim 1 is characterized in that: automatically controlled piezoelectric ceramics block (3) is enclosed within described adiabatic region (II).
4. the pulsating heat pipe heat transfer system that is with automatically controlled piezoelectric ceramics block according to claim 1 is characterized in that: automatically controlled piezoelectric ceramics block (3) is enclosed within described condensing zone (III).
5. the pulsating heat pipe heat transfer system that is with automatically controlled piezoelectric ceramics block according to claim 1 is characterized in that: automatically controlled piezoelectric ceramics block (3) all is with in described evaporating area (I), adiabatic region (II), condensing zone (III).
6. according to claim 1 each described pulsating heat pipe heat transfer system that is with automatically controlled piezoelectric ceramics block in 5 so far; It is characterized in that: automatically controlled piezoelectric ceramics block (3) is at described evaporating area (I); Adiabatic region (II), the quantity that is with in each zone of condensing zone (III) can make up as required.
7. according to each described pulsating heat pipe heat transfer system that is with automatically controlled piezoelectric ceramics block in the claim 1 to 5, it is characterized in that: be the gap that is slidingly matched between the interior ring of automatically controlled piezoelectric ceramics block (3) and pulsating heat pipe (1) outer wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220137553 CN202582301U (en) | 2012-04-01 | 2012-04-01 | Pulsating heat pipe heat-transfer system sleeved with electronic control piezoelectric ceramic block |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220137553 CN202582301U (en) | 2012-04-01 | 2012-04-01 | Pulsating heat pipe heat-transfer system sleeved with electronic control piezoelectric ceramic block |
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| CN202582301U true CN202582301U (en) | 2012-12-05 |
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| CN 201220137553 Expired - Fee Related CN202582301U (en) | 2012-04-01 | 2012-04-01 | Pulsating heat pipe heat-transfer system sleeved with electronic control piezoelectric ceramic block |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102620586A (en) * | 2012-04-01 | 2012-08-01 | 大连海事大学 | Pulsating heat pipe heat-transferring system sleeved with electric control piezoceramic blocks |
| CN109877028A (en) * | 2019-03-28 | 2019-06-14 | 浙江师范大学 | Pulsating heat pipe cooling type high power altrasonic transducer |
| CN110726317A (en) * | 2019-09-05 | 2020-01-24 | 浙江大学 | Ultrasonic pulsating heat pipe radiator with thermoelectric power generation driving and temperature early warning functions |
| CN112050676A (en) * | 2020-09-14 | 2020-12-08 | 西安交通大学 | Phase change energy storage strengthening device with built-in ultrasonic generator |
-
2012
- 2012-04-01 CN CN 201220137553 patent/CN202582301U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102620586A (en) * | 2012-04-01 | 2012-08-01 | 大连海事大学 | Pulsating heat pipe heat-transferring system sleeved with electric control piezoceramic blocks |
| CN102620586B (en) * | 2012-04-01 | 2013-12-18 | 大连海事大学 | Pulsating heat pipe heat-transferring system sleeved with electric control piezoceramic blocks |
| CN109877028A (en) * | 2019-03-28 | 2019-06-14 | 浙江师范大学 | Pulsating heat pipe cooling type high power altrasonic transducer |
| CN109877028B (en) * | 2019-03-28 | 2023-12-19 | 浙江师范大学 | Pulsating heat pipe heat dissipation type high-power ultrasonic transducer |
| CN110726317A (en) * | 2019-09-05 | 2020-01-24 | 浙江大学 | Ultrasonic pulsating heat pipe radiator with thermoelectric power generation driving and temperature early warning functions |
| CN112050676A (en) * | 2020-09-14 | 2020-12-08 | 西安交通大学 | Phase change energy storage strengthening device with built-in ultrasonic generator |
| CN112050676B (en) * | 2020-09-14 | 2022-02-18 | 西安交通大学 | Phase change energy storage strengthening device with built-in ultrasonic generator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121205 Termination date: 20180401 |
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| CF01 | Termination of patent right due to non-payment of annual fee |