CN2747513Y

CN2747513Y - Vacuum glass cover board heat pipe plate type solar energy water heater

Info

Publication number: CN2747513Y
Application number: CNU2004200377584U
Authority: CN
Inventors: 胡亚才; 洪荣华; 俞自涛; 魏林生; 王世锋
Original assignee: Zhejiang University ZJU
Current assignee: Zhejiang University ZJU
Priority date: 2004-07-16
Filing date: 2004-07-16
Publication date: 2005-12-21
Anticipated expiration: 2014-07-16

Abstract

The utility model discloses a vacuum glass cover board heat pipe plate type solar energy water heater. The utility model comprises an insulation material and a box formed by an outer frame. The top of the box is provided with a vacuum plate glass while a plurality of heat-transfer plates with heat pipes are arranged in parallel in the box. The heat pipe is in sequence provided with heat-collecting ribs, a thermal insulating block and condensing ribs. The condensing ribs of a plurality of heat-transfer plates are fixed in parallel in a circulate water tank which is connected with a water storage tank. The utility model has no problems of icing, scaling and air corroding. The vacuum plate glass is highly transparent for the solar radiation but is not transparent for the infrared radiation, which can eradiate the infrared radiation from the inside of the box so that the radiation heat loss of the heat-transfer plates is restrained. Otherwise, as the heat pipe with quick start, high sensitivity, wide working range and fast heat transfer speed, when the solar irradiation is low, the utility model can reduce the heat loss of the heated working substance.

Description

Vacuum glass-covered board heat pipe solar water heater

Technical field

The utility model relates to a kind of vacuum glass-covered board heat pipe solar water heater.

Background technology

Now general vacuum pipe solar water heater has following problem to need to be resolved hurrily through being extensive use of for many years on the domestic market: 1. in-tube fouling problem.Because in heat collecting pipeline, circulate throughout the year, cause scaling in the pipe, incrustation scale has hindered heat transfer, and the efficient of heat collector is obviously descended.Especially in the rural area, very poor because of water quality, cause collector efficiency growth in time to descend very fast.2. ice formation issues in managing.In the winter of severe cold, the water in the heat collecting pipeline build-ups ice, and volume swells, and causes the pipeline spalling.3. thermal-collecting tube internal memory dilutional hyponatremia, water temperature rises slowly, and the hot water in the pipe can't all take out, and the pressure that can not bear in the tap water pipe line system easily bursts.4. the absorber of electron tubes type solar thermal collector is not that compact arranged vacuum tube is formed by some, in Qian Hou quite a while, though there is quite a few energy to be received by daylighting face, does not enter into absorber at noon.5. surperficial heat waste is big.6. vacuum pipe solar water heater can not be made the building block overall structure and building combines.These problems have been brought a lot of inconveniences to the consumer, have influenced this energy-conserving and environment-protective product to a certain extent in the In The Heart of The Consumers image, directly have influence on further developing of whole solar energy industry simultaneously.

Summary of the invention

The purpose of this utility model provides a kind of vacuum glass-covered board heat pipe solar water heater.

It has casing that insulation material and housing form, is provided with vacuum flat glass above casing, be provided with a plurality of heat transfer plates placed side by side in the casing, heat transfer plate has heat pipe, on heat pipe, be provided with thermal-arrest fin, heat insulation, condensation fin successively, the condensation fin of a plurality of heat transfer plates is fixed in the cyclic water tank side by side, and cyclic water tank and water storage tank join.

That the utility model vacuum glass cover plate heat-pipe flat-plate type water heater does not exist is icing, fouling and air corrosion problem.Vacuum flat glass is high transparent to solar radiation, and is opaque to infra-red radiation, can launch the infra-red radiation that comes from box house preferably, thereby the radiation heat loss of heat transfer plate has been played the containment effect; In addition, because of having, heat pipe starts soon, highly sensitive, working range is big, heat transfer rate is fast, have only unidirectional exchange heat (thermal diode effect) between heat transfer plate and the water and do not have mass exchange, when solar irradiation is low, can reduce being heated working medium and dispelling the heat towards periphery, reduce heat loss especially at night greatly.The utility model can the four seasons be suitable for, be not afraid of freeze, can pressure-bearing, manufacturing process is simple, collecting efficiency is high, good heat insulating and the solar water heater that combines with the building one.

Description of drawings

Fig. 1 is the structure chart of vacuum glass cover plate heat-pipe flat-plate type solar thermal collector, among the figure: water inlet 1, condensation fin 2, heat insulation 3, thermal-arrest fin 4, heat pipe bracing frame 5, heat pipe 6, cyclic water tank 7, delivery port 8;

Fig. 2 is the heat collector A-A cutaway view of vacuum glass-covered board heat pipe solar water heater, among the figure: vacuum glass cover plate 9, polyurethane insulation material 10, aluminium chassis 11, heat pipe 6;

Fig. 3 is the vacuum glass-covered board heat pipe solar water heater schematic diagram.

The specific embodiment

The heat pipe that the utility model adopts is a gravity assisted heat pipe, fin and heat pipe welding.Heat pipe is can transmit a large amount of heats by a very little area.Heat pipe utilizes the evaporator section of working medium and condensation segment to transmit heat.Evaporator section is placed on thermal source such as the sun absorbs heat down, and the liquid phase hydraulic fluid absorbs the latent heat of vaporization and evaporates, and the other end of heat pipe is that condensation segment is cooled off by low-temperature receiver, and as the water in the water tank, hydraulic fluid is emitted the latent heat of vaporization.Condensate liquid relies on the gravity of self to turn back to condensation segment, does not need additionaling power and working medium circulates voluntarily.The work of gravity assisted heat pipe has certain directionality, and evaporator section must place the below of condensation segment, so just can make condensate liquid rely on the gravity of self to be turned back to evaporator section.Heat pipe dependence self internal work liquid phase-change is realized conducting heat, and it has good isothermal, and axially temperature drop is very little; Performance with thermal diode only allows hot-fluid to flow to a direction, and does not allow to flow in the opposite direction.

Vacuum glass-covered board heat pipe solar water heater has casing that insulation material 10 and housing 11 form, is provided with vacuum flat glass 9 above casing, be provided with a plurality of heat transfer plates placed side by side in the casing, heat transfer plate has heat pipe 6, on heat pipe 6, be provided with thermal-arrest fin 4, heat insulation 3, condensation fin 2 successively, the condensation fin 2 of a plurality of heat transfer plates is fixed in the cyclic water tank 7 side by side, and cyclic water tank 7 joins with water storage tank.

The utility model operation principle is: after solar energy sees through vacuum flat glass, the heat transfer plate that solar energy is scribbled surperficial absorber coatings absorbs, heat pipe reaches operating temperature (more than 30 ℃), phase transition process by internal working medium flows to cyclic water tank rapidly with heat, cyclic water tank carries out heat exchange (or the phase transition process of internal working medium directly flows to water storage tank rapidly with heat) with water storage tank again, bottom half and being incubated with heat-insulating material all around, has only unidirectional exchange heat between heat transfer plate and the cyclic water tank (or water storage tank), without any mass exchange.

Claims

1, a kind of vacuum glass-covered board heat pipe solar water heater, it is characterized in that it has the casing of insulation material (10) and housing (11) composition, is provided with vacuum flat glass (9) above casing, be provided with a plurality of heat transfer plates placed side by side in the casing, heat transfer plate has heat pipe (6), on heat pipe (6), be provided with thermal-arrest fin (4), heat insulation (3), condensation fin (2) successively, the condensation fin (2) of a plurality of heat transfer plates is fixed in the cyclic water tank (7) side by side, and cyclic water tank (7) joins with water storage tank.