1, vacuum tube burst key burst in what parts, in order to further confirm the reason (tank reason, the vacuum tube itself causes). 2, solar water heater system is now mature technology process, but the production process is still very large difference. Tank polyurethane insulation aging, after high temperature will produce secondary foam, this case generally can visually determine that visual tank vacuum tube plug hole whether the insulation layer expands, this expansion of the role of squeeze pressure vacuum tube rupture. Involving manufacturers vacuum tube production process quality problems in the production process of glass ring sealed stress is eliminated, ring sealing at the presence of stress nozzle ring burst, the breakdown of the crushing wall problem is easy to produce. 4, according to the analysis of the above phenomenon, mostly general should belong to the vacuum tube itself.

photoelectric conversion of solar fiber lighting while people in the use of solar energy is more and more widely, but the current utilization of solar energy is mainly concentrated in converting solar energy into electrical energy and thermal energy, and fiber optic lighting is the solar direct utilization technology.Fiber optic lighting the way and principle of solar lamp using solar energy as the energy mainly has two ways, one is direct the sunlight into the indoor lighting.Two is to take the PV, again through the optical system illumination.Here the author mainly introduces the first way that directly convert sunlight into the indoor lighting principle.Solar fiber lighting system is formed by condensing device, transmission device and radiation device is composed of three parts.Outdoor natural light through the condensing device into the lighting system to redistribute, after conduction device (optical fiber) transmission and enhanced by the system at the bottom of the radiation device (indoor terminal projection device) to natural light uniformly efficient exposure to indoor natural lighting, special effects.1 light focusing device for focusing device, namely the optical collector can be installed in the house all day without any restrictions to lighting, so that the light gathering efficiency to the maximum.Due to light diameter limit as well as to reduce the transmission attenuation of light, we want to put the light gathering resembles and exactly with the optical port combination.The optical collector mainly in two ways: (1) set light by two reflection to the light focusing reflective spot (2) using a refractive lens for focusing the lens type spot practical application is to be taken separately or simultaneously modular back to increase the light receiver volume.At the same time also can be equipped with solar azimuth tracker (this is a through detecting instrument solar azimuth change modular condenser orientation and elevation apparatus), so that the optical collector set light effect ascension.The 2 conductive device optical fiber lighting system in the main part, according to the principle of total reflection produce can transmit light or transmitted to a predetermined address fiber with anti jamming of wide application scope, diameter of thin, light weight, corrosion resistant ability, rich in resources and other advantages of fiber manufacturing.From structure to divide, fiber has single strand, strand and reticular three.A single strand of fiber diameter to the general diameter 6 ~ Ф 20mm.At the same time, a single strand of fiber can be divided into the body for emitting light and emitting the beam end of two to the endpoint, through the tail lamp lighting and the latter is a luminous body, forming a flexible beam..The multiple strands of fiber, both end led.Multiple strands of fiber diameter average diameter 0.5 ~ Ф 3mm, but shares common to several hundreds of root.Reticular fibers are fine diameter body LED fiber composition, can be composed of flexible light band.The 3 radiation unit (terminal attachment point) according to the light-emitting optical fiber and optical fiber luminescent characteristic of the different lines, there are two types of end fitting: A, emitting terminal Annex: configuration at the point of light emitting optical fiber end of the various kinds of reflective or direct style similar to the lighting accessories, lamp type, with a cylinder lens type (can be light or the light), a special ground and underwater type terminal.B, don't shine terminal Annex: allocation on-line light-emitting optical fiber terminal, is impermeable