CN104930891A - Self-cleaning heat pipe with super-hydrophilic liquid absorption core - Google Patents

Abstract

Translated fromChinese

本发明公开了一种具有超亲水吸液芯的自清洁热管，包括管壳、超亲水吸液芯、超疏水薄膜三部分。所述管壳为密闭空腔；所述的密闭空腔内含有超亲水吸液芯和传热介质；所述超亲水吸液芯包括吸液芯和超亲水薄膜两部分；所述吸液芯为丝网吸液芯；所述超亲水薄膜在丝网吸液芯表面；所述超亲水薄膜表面粗糙结构厚度在50~ 500nm之间；所述超亲水薄膜表面粗糙结构顶部直径在1 ~ 200 nm之间；所述超亲水薄膜表面粗糙结构顶部间距在10 ~ 100 nm之间。所述管壳外表面覆有超疏水薄膜；所述超疏水薄膜厚度在50 ~ 500 nm之间。所述超亲水吸液芯通过纳米尺度粗糙结构构筑，可提高热管传热性能；所述超疏水薄膜具有抗粘附性，可解决热管外表面的积灰问题，实现自清洁。本发明有效的提高了热管的自清洁及传热性能。

The invention discloses a self-cleaning heat pipe with a super-hydrophilic liquid-absorbing core, which comprises three parts: a tube shell, a super-hydrophilic liquid-absorbing core and a super-hydrophobic film. The shell is a closed cavity; the closed cavity contains a super-hydrophilic liquid-absorbing core and a heat transfer medium; the super-hydrophilic liquid-absorbing core includes two parts: a liquid-absorbing core and a super-hydrophilic film; The liquid-absorbing core is a wire mesh liquid-absorbing core; the super-hydrophilic film is on the surface of the screen liquid-absorbing core; the surface rough structure thickness of the super-hydrophilic film is between 50-500nm; the surface rough structure of the super-hydrophilic film is The diameter of the top is between 1 and 200 nm; the distance between the top of the rough structure on the surface of the super-hydrophilic film is between 10 and 100 nm. The outer surface of the tube shell is covered with a super-hydrophobic film; the thickness of the super-hydrophobic film is between 50-500 nm. The super-hydrophilic liquid-absorbing core is constructed with a nano-scale rough structure, which can improve the heat transfer performance of the heat pipe; the super-hydrophobic film has anti-adhesion properties, can solve the problem of dust accumulation on the outer surface of the heat pipe, and realize self-cleaning. The invention effectively improves the self-cleaning and heat transfer performance of the heat pipe.

Description

Translated fromChinese

一种具有超亲水吸液芯的自清洁热管A self-cleaning heat pipe with a superhydrophilic wick

技术领域technical field

本发明涉及一种具有超亲水吸液芯的自清洁热管，属于热交换技术领域。The invention relates to a self-cleaning heat pipe with a superhydrophilic liquid-absorbing core, belonging to the technical field of heat exchange.

背景技术Background technique

热管是一种依靠自身内部工作液体相变实现热量传递的元件，它利用液体的蒸发和冷凝使热量快速传递。同时它可以通过很小的横截面积远距离输送热量而无需外加动力。正是由于热管自身优良的传热性能，热管在太阳能供暖、电子设备冷却、化学化工、航空航天等领域得到广泛应用。A heat pipe is a component that relies on the phase change of its internal working liquid to achieve heat transfer. It uses the evaporation and condensation of the liquid to transfer heat quickly. At the same time, it can transport heat over a long distance through a small cross-sectional area without external power. It is precisely because of the excellent heat transfer performance of heat pipes that heat pipes are widely used in solar heating, electronic equipment cooling, chemical engineering, aerospace and other fields.

热管主要依靠管内吸液芯获得毛细力实现热量传递，吸液芯驱使的传热介质回流直接影响着传热效率，因此有必要进一步对吸液芯进行改善，实现高效传热。The heat pipe mainly relies on the capillary force obtained by the liquid-absorbing core in the pipe to realize heat transfer. The backflow of the heat transfer medium driven by the liquid-absorbing core directly affects the heat transfer efficiency. Therefore, it is necessary to further improve the liquid-absorbing core to achieve efficient heat transfer.

对于长期暴露在空气中的热管，其外表面很容易吸附灰尘，这增加了热管受热面热阻，降低了传热性能。同时清洁表面杂质需耗费大量人力、物力。For heat pipes exposed to the air for a long time, dust is easily absorbed on the outer surface, which increases the thermal resistance of the heating surface of the heat pipe and reduces the heat transfer performance. At the same time, it takes a lot of manpower and material resources to clean the surface impurities.

发明内容Contents of the invention

鉴于此，有必要提供一种可实现高效传热的自清洁热管。In view of this, it is necessary to provide a self-cleaning heat pipe that can realize efficient heat transfer.

为达到上述目的，本发明采取的技术方案如下。In order to achieve the above object, the technical scheme adopted by the present invention is as follows.

一种具有超亲水吸液芯的自清洁热管，包括管壳、超亲水吸液芯、超疏水薄膜。所述管壳材质为铜、不锈钢等；所述管壳为密闭空腔；所述的密闭空腔内含有超亲水吸液芯和传热介质；所述超亲水吸液芯包括吸液芯和超亲水薄膜两部分；所述吸液芯为丝网吸液芯；所述超亲水薄膜在丝网吸液芯表面；所述超亲水薄膜表面粗糙结构厚度在50 ~ 500 nm之间；所述超亲水薄膜表面粗糙结构顶部直径在1 ~ 200 nm之间；所述超亲水薄膜表面粗糙结构顶部间距在10 ~ 100 nm之间。所述超疏水薄膜覆在管壳外表面；所述超疏水薄膜厚度在50 ~ 500 nm之间；所述超疏水薄膜以高导热金属、金属氧化物、石墨等材料为主。A self-cleaning heat pipe with a super-hydrophilic liquid-absorbing core includes a tube shell, a super-hydrophilic liquid-absorbing core, and a super-hydrophobic film. The material of the shell is copper, stainless steel, etc.; the shell is a closed cavity; the closed cavity contains a super-hydrophilic liquid-absorbing core and a heat transfer medium; the super-hydrophilic liquid-absorbing core includes a liquid-absorbing The core and the super-hydrophilic film are two parts; the liquid-absorbing core is a screen liquid-absorbing core; the super-hydrophilic film is on the surface of the screen liquid-absorbing core; The diameter of the top of the rough surface of the superhydrophilic film is between 1 and 200 nm; the distance between the top of the rough structure of the superhydrophilic film and the surface is between 10 and 100 nm. The super-hydrophobic film is covered on the outer surface of the shell; the thickness of the super-hydrophobic film is between 50 and 500 nm; the super-hydrophobic film is mainly made of high thermal conductivity metal, metal oxide, graphite and other materials.

本发明有益效果：所述超亲水薄膜，通过纳米粗糙结构构筑增加了吸液芯的表面积及毛细作用，因而促进热管蒸发段的蒸发、冷凝段的冷凝及液体回流，提高了传热性能。所述超疏水薄膜，其表面具有良好的抗粘附性能，表面灰尘可借助雨水冲刷作用清除，因而可以实现热管表面的自清洁功能。Beneficial effects of the present invention: the super-hydrophilic film increases the surface area and capillary action of the liquid-absorbing core through the construction of the nano-rough structure, thereby promoting evaporation in the evaporation section of the heat pipe, condensation in the condensation section, and liquid reflux, and improving heat transfer performance. The surface of the super-hydrophobic film has good anti-adhesion performance, and the dust on the surface can be washed away by rainwater, so that the self-cleaning function of the surface of the heat pipe can be realized.

附图说明Description of drawings

图1是具有超亲水吸液芯的自清洁热管结构示意图。Fig. 1 is a schematic structural diagram of a self-cleaning heat pipe with a super-hydrophilic liquid-absorbing core.

图中1为管壳；2为超亲水吸液芯；3为超疏水薄膜；4为蒸发段；5为冷凝段。In the figure, 1 is the shell; 2 is the super-hydrophilic liquid-absorbing core; 3 is the super-hydrophobic film; 4 is the evaporation section; 5 is the condensation section.

具体实施方式Detailed ways

下面结合附图对本发明的具体实施做进一步描述。The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings.

管壳1材质为铜、不锈钢等。The shell 1 is made of copper, stainless steel or the like.

在管壳1内表面制备丝网吸液芯。A wire mesh wick is prepared on the inner surface of the shell 1 .

对吸液芯表面进行清理后采用化学浴沉积、电化学沉积等方法构筑超亲水薄膜。为增加表面浸润性，该薄膜以具有明显的粗糙度的纳米结构为主。After cleaning the surface of the liquid-absorbing core, the super-hydrophilic film is constructed by chemical bath deposition, electrochemical deposition and other methods. To increase surface wettability, the film is dominated by nanostructures with pronounced roughness.

将管壳1抽真空后灌入适当的传热介质，然后封闭管口，形成封闭空间。Vacuum the shell 1 and fill it with a suitable heat transfer medium, then close the nozzle to form a closed space.

对管壳1外表面进行清理后采用化学浴沉积、磁控溅射等方法构筑超疏水薄膜3。为减少热阻，该薄膜以高导热金属及金属氧化物、石墨等材料为主。After cleaning the outer surface of the tube shell 1, the super-hydrophobic film 3 is constructed by chemical bath deposition, magnetron sputtering and other methods. In order to reduce thermal resistance, the film is mainly made of high thermal conductivity metals, metal oxides, graphite and other materials.

当热管内蒸发段4受热时，热管中的换热介质在超亲水吸液芯表面迅速汽化，蒸气在微小的压力差下流向冷凝段5，并且释放出热量。此时液滴在冷凝段超亲水吸液芯2表面快速冷凝融合，通过毛细作用，液滴回流到蒸发段4。通过这种快速循环，热量可以被源源不断地传导开来。When the evaporating section 4 in the heat pipe is heated, the heat exchange medium in the heat pipe vaporizes rapidly on the surface of the super-hydrophilic liquid-absorbing core, and the steam flows to the condensing section 5 under a slight pressure difference, and releases heat. At this time, the droplets condense and fuse rapidly on the surface of the super-hydrophilic liquid-absorbing core 2 in the condensation section, and the droplets flow back to the evaporation section 4 through capillary action. Through this rapid cycle, heat can be continuously conducted away.

通过吸液芯表面超亲水薄膜的构筑，增加了表面积，促进蒸发段热量的传递速率。Through the construction of the super-hydrophilic film on the surface of the liquid-absorbing core, the surface area is increased and the heat transfer rate in the evaporation section is promoted.

通过热管内超亲水吸液芯的构筑，增加了表面润湿性，促进液体在内壁的快速冷凝融合及向蒸发段的回流。Through the construction of the super-hydrophilic liquid-absorbing core in the heat pipe, the wettability of the surface is increased, and the rapid condensation and fusion of the liquid on the inner wall and the return to the evaporation section are promoted.

热管外表面的超疏水薄膜可以降低液滴在热管表面润湿性，液滴在热管表面以珠状形式存在，可以迅速离开且带走表面灰尘，实现自清洁性能。The superhydrophobic film on the outer surface of the heat pipe can reduce the wettability of droplets on the surface of the heat pipe. The droplets exist in the form of beads on the surface of the heat pipe, which can quickly leave and take away the surface dust to achieve self-cleaning performance.

Claims (9)

Translated fromChinese

1.一种具有超亲水吸液芯的自清洁热管，包括管壳、超亲水吸液芯、超疏水薄膜。1. A self-cleaning heat pipe with a super-hydrophilic liquid-absorbing core, comprising a tube shell, a super-hydrophilic liquid-absorbing core, and a super-hydrophobic film.2.如权利要求1所述的管壳为铜、不锈钢等材质。2. The shell as claimed in claim 1 is made of materials such as copper and stainless steel.3.如权利要求1所述的管壳内含有超亲水吸液芯和传热介质。3. The shell as claimed in claim 1 contains a super-hydrophilic liquid-absorbing core and a heat transfer medium.4.如权利要求1所述的超亲水吸液芯包括吸液芯和超亲水薄膜两部分。4. The super-hydrophilic liquid-absorbing core as claimed in claim 1 comprises two parts: a liquid-absorbing core and a super-hydrophilic film.5.如权利要求4所述的吸液芯为丝网吸液芯。5. The wick according to claim 4 is a wire mesh wick.6.如权利要求4所述的超亲水薄膜在吸液芯表面，以具有明显的粗糙度的纳米结构为主。6. The super-hydrophilic film as claimed in claim 4 is mainly composed of nanostructures with obvious roughness on the surface of the liquid-absorbing core.7.如权利要求4所述的超亲水薄膜表面粗糙结构厚度在50 ~ 500 nm之间，顶部直径在1 ~ 200 nm之间，顶部间距在10 ~ 100 nm之间。7. The surface rough structure of the superhydrophilic film according to claim 4 has a thickness between 50 and 500 nm, a top diameter between 1 and 200 nm, and a top spacing between 10 and 100 nm.8.如权利要求1所述的超疏水薄膜覆在管壳外表面，厚度在50 ~ 500 nm之间。8. The superhydrophobic film as claimed in claim 1 is coated on the shell outer surface, and the thickness is between 50 ~ 500 nm.9.如权利要求1所述的超疏水薄膜以高导热金属、金属氧化物、石墨等材料为主。9. superhydrophobic film as claimed in claim 1 is based on materials such as high thermal conductivity metal, metal oxide, graphite.