Fluid through the orifice flow constant cross section is smaller

Web Design And Seo For www.china-webdesign.com

Gas Grill Valves - China Manufacturer

Thank you for inquiry my Gas Grill Valves, Tel: 086-0574-86196509, E-mail: chairman@nbqianshou.com

http://www.qus-gasvalve.com/key-Gas-Grill-Control-Valve-62/

Fluid through the orifice flow constant cross section is smaller, resulting in a flow rate of sudden increase. Fluid energy conservation law, the flow rate is increased, the static pressure suddenly dropped, the orifice at the pressure drops below the saturation vapor pressure of the fluid, the partial vaporization of the liquid as a gas, hydraulic cutting machinebubbles formed in the stream. When the outlet pressure is still lower than the saturated vapor pressure, the air bubbles will remain in the valve after the formation of the phenomenon of gas-liquid two-phase coexistence, ie "flash". Generate flashed fluid orifice With over water cross section increases, the flow rate is reduced accordingly, pressure valve after the abrupt rise. When the valve after the pressure was returned to the saturated vapor pressure higher than the liquid, the pressure compressing the flash of bubbles generated from circular to elliptical, and then reaches the surface of the upstream of the critical dimension of bubbles began to flatten, and then burst, this process is called " cavitation. " All the energy is conce ntrated in the rupture point, and have a huge impact collision valve, valve seat and valve body, to its surface plastic deformation, the formation of a rough cellular slag hole, this is the cavitation formation process. Oven Safety Gas Valves

important elements of the mercy of LED lamps cost-effective

Web Design And Seo For www.china-webdesign.com

led strip light - China Manufacturer

Thank you for inquiry my led strip light, Tel:+86-574-87641051 E-MAIL:sales@everlightings.com

http://www.everlites.com/led-strips/

LED lighting, this property depends on long-lasting, I think is a very price, it is worth a long-lasting investment property, due to the use of surface through so many years of growth is expanding, most start cell phone backlight to Today s outdoo r color display to the LED-TV backlight, the future certainly is the general lighting market, a large space. We mentioned in the impact statements sideways space is probably tens of billions of U.S. $ 600 - $ 700 space, so the thought of enduring investment is not the subject. The short term, however, the market everyone to expand more quickly, not so fast together will form all provide redundant, the price will continue to go down, so investors looking for this industry, I started as usual from the mean deposit dependents I mean really current, and then save families upstream, which is an initiator.


The elucidation of the market: What are the important elements of the mercy of downlight led lamps cost-effective?


Lighting is increasingly fierce price war, surface, layout, almost the same efficacy of the product, the price difference there 2-3 times, many users temporarily get faint brain s, I do not know the price difference come from, as usual to give birth LED LED LED lighting manufacturers are difficult to differences, more Moreover consume. Market and so messy, incurred by consumers of is always Ruomingruoan, scratching their brains. Then important elements of form and so a large price gap, what does? Quality of consumption to identify these products should identify which according to it?


Chips big and small


Chips big and small to the side of performance, the character of the large-chip underwater lights is better than a small chip. Price with the chip size is inversely proportional.


Colloid


Ordinary LED colloid as common epoxy resin, plus a more expensive anti-purple inside and fire agents LED inside and fire of the high character of outdoor LED lighting should be purple.


Brightness


LED brightnes s difference between the price difference.


Life


The difference in the character of the vital life, life by the resolution of the light fades. Light decay, long life, long life and high price.


LED chip

LED lamp construction lag

Web Design And Seo For www.china-webdesign.com

led bulbs - China Manufacturer

Thank you for inquiry my led bulbs, Tel:+86-574-87641051 E-MAIL:sales@everlightings.com

http://www.everlites.com/led-bulb-lamps/

LED lighting industry is developing rapidly. 2010 LED lighting starts to ferment, market demand for greatly increased compared with 2009, do the LED packaging, LED display enterprises also have to enter the field of LED lighting. The only LED packaging enterprises in the Chinese market ha s been very little, most of the companies have to do packaging development and production of LED lighting products. LED application areas of business boundaries are increasingly blurred, the enterprise LED product line becomes longer. Although the technological level of the LED products compared to previous years the level of technology has been greatly improved, but most companies dominate the market price at the expense of the quality of the product, also led to a gradual decline in product margins. But already a lot of LED companies began to increase R & D investment to the development of high technology, high value-added, the product of intelligent direction. In the package and the application side, some of the products of individual enterprises and international LED manufacturers competing against. Even so, the LED chip companies overall profit. downlight led chip companies on the overall vote [Us News] into a l arge LED chip industry sales in 2009 of just over 20 billion yuan, and most of the LED chip companies with negative profit or no profit. LED chip companies by the end of 2009 amounted to 62, with the introduction of the technology of large-scale input of the LED chip companies and Taiwan, it is expected that the LED chips in the next few years, China will have a very large development.


Occupy an important position in export, the weak domestic market, in particular the Pearl River Delta region of the LED business, many companies export accounted for more than 50% of the proportion. Mainly because the price of LED products for Chinese consumers is still relatively high, LED application product sales are mainly concentrated in the commercial lighting and municipal engineering, general consumer acceptance is still at a low level. LED inter-firm merger is very rare. Currently on the market there is little between the LED business merger situation, the basic expan d the scale on its own. Compared to the thousands of enterprises on the market, the proportion of mergers between firms is negligible. The main reason is that the LED market is still immature and fully competitive, most businesses can find their own living space. However, the enterprise is very large relative to the small number of merger and reorganization, China LED industry each year to enter and exit.


Corporate proliferation of the lack of leading enterprises


The theme of environmental protection and energy conservation for the commercial led lighting industry, the LED lighting business can be said that the proliferation of a new technological breakthroughs, investing in LED technology lighting springing up everywhere. According to statistics, the annual output value of China s LED industry, billion enterprise has more than 140. With so many brands, but the lack of lea ding enterprises.

Dimmable LED lighting design technical issues need to be considered

Web Design And Seo For www.china-webdesign.com

led bulbs - China Manufacturer

Thank you for inquiry my led bulbs, Tel:+86-574-87641051 E-MAIL:sales@everlightings.com

http://www.everlites.com/led-bulb-lamps/

Incandescent bulbs per watt to produce 10 lumens, LED manufacturers claim per watt LED lamps can achieve up to 100 lumens. However, the limitations of the shape and maximum working temperature LED difficult to realize its full potential. Performance of the best LED replacement lamps, the efficiency can reach 50-60 lumens per watt. Therefore, LED lamps, CFL lamps in terms of efficiency standards have been equally matched (Note: CFL lamp efficiency range of 60-70 lumens per watt, and the limited potential for improvement).


Ecological problems are also increasingly subject to public attention. With the increasing awareness of environmental issues of global warming and climate change, the idea of ??saving resources and energy is becoming the main points of the marketing strategy. Reduce vehicle fuel consumption and the incandescent lamp is disabled in the past 10 years, a good illustration of this trend. The global multi-national government has developed the incandescent phase-out schedule. Some public policy specifically for energy saving and environmentally friendly "eco" products to provide generous tax support or other financial help.


The inherent advantages of LED s is very eagerly looking forward to meet the publ ic safety, energy saving and environmentally friendly lighting solutions. LED, there are many other advantages such as higher dimming capability, long life and smaller form factor size, shape, color, life and cost to open the door.


LED lighting solutions in all aspects of mechanical, optical, electrical and thermal-compatible alternative to traditional lighting sources (fluorescent lamps, CFL energy-saving lamps, halogen or other incandescent) is an industrial change. Business, office and residential lighting market calls for high quality downlight led modified fixtures. Although cost is still a major obstacle for these solutions, but also need to pay attention to the following technical issues:


[1]. Electrical compatibility with the existing infrastructure, particularly in the use of standards into the wall socket dimmer.


[2]. Shape shall be screw type


[3]. LED heat problem must be solved


1.1 dimmer compatibility


At present, the family, hotel and office space, lighting control equipment are designed and installed for incandescent. Dimming function best approach is to use the electricity cut phase dimmer. The dimmer principle developed for the incandescent lamp power supply. From electricity, incandescent can be regarded as a resistive load.


Electronic lighting source (such as CFL energy-saving lamps or induction lighting lights) electrical equivalent load is no longer a pure resistive load. So that the dimmer work on very different. Improper load use will cause the system malfunction may be very uncomfortable flashing, and even damage to the fixture or dimmer. This may lead to user dissatisfaction, thus postponing the adoption of LED solutions. At present, the dimmer is still expensive and difficult to install. Ther efore, the introduction of high-quality solutions compatible with existing dimmers to honor the commitment of LED lighting to promote the inevitable.


Phase cutting dimmer different types, but the working principle is basically the same (ie, cut off some of the power sine wave in each cycle). This can be done through the switch. Switch is turned on, the power delivered to the load (light bulb). Switch is off, no power supply. By adjusting the switch on time, you can adjust the total energy delivered to the load.

dimmer into two categories: the forefront of cutting-and tangential phase-type.

Web Design And Seo For www.china-webdesign.com

led bulbs - China Manufacturer

Thank you for inquiry my led bulbs, Tel:+86-574-87641051 E-MAIL:sales@everlightings.com

http://www.everlites.com/led-bulb-lamps/

[1]. Cutting-edge phase cutting dimmer is the beginning of the half-cycle power cut. After a period of time corresponding to the location of the dimmer switch only turns on for the end of the load power supply up to half cycle. After 0:00, repeat the same operation.


[2]. Tangential phase dimmer switch is in the beginning of the half cycle conduction downlight led after a period of time corresponding to the location of the dimmer, and disconnected to keep to the end of the half cycle. After 0:00, repeat the same operation.


To complete the cutting phase, the main use of two technologies: TRIAC (triac) switch or transistor switch. TRIAC dimmer and more cutting-edge phase cutting dimmer. Transistor switch can be either the forefront of cutting phase dimmer can also be tangential dimmer. TRIAC dimmer problem is that it needs to meet the special conditions to work properly: TRIAC can trigger the gate to open, once activated, still needs a minimum current to maintain its conduction state. The trigger current is called "latch-up current, and in order to keep the TRIAC conduction current must be loaded for some time. Once the device latch must have a continuous supply of cur rent. This current is called the "keep current" if the current is broken or weakened, TRIAC will turn off. For compatibility with dimmers, LED lamps must be required to maintain current absorption dimmer. For example, if a 6W LED lights (roughly equivalent to a 40W incandescent bulbs) with a minimum load 10W dimmer with use, you need some additional circuitry to provide sufficient current to maintain. In this case, the light bulb efficiency will be reduced, compared with 40W high efficiency. Without this circuit, commercial led lighting lights do not work properly. Dimmer to keep current. Therefore, the greater the additional loss, better compatibility dimmer. Dimmable applications design difficulty is to find the best trade-off between the luminaire efficiency and dimmer compatibility.

three stages of the development of lighting industry, LED lamps

Web Design And Seo For www.china-webdesign.com

led wall lights - China Manufacturer

Thank you for inquiry my led wall lights, Tel:+86-574-87641051 E-MAIL:sales@everlightings.com

http://www.everlites.com/led-wall-lights/

With the gradual development of LED lighting, lighting engineering auxiliary lighting and other public places, LED gradually replaced some of the traditional light source products. LED initially dominated by monochroma tic light, although the power of small, high prices, but its high reliability, strong control, small size, so the first emerging market electronic device indicator. With the gradual development of LED lighting, lighting engineering auxiliary lighting and other public places, LED lighting gradually replaced some of the traditional light source products.


In 2009, LED lighting in developed countries into the popularity of the main induction lighting. The market for LED lighting products has been recognized and accepted. Other features of environmental protection, small size, high reliability of the LED lamps are increasingly prominent. In commercial applications place higher electricity bills, longer, LED lighting is rapidly becoming the new darling of the market. As the use of LED lighting, LED market development in several stages.


Stage one: LED lamps utility model


On the basis of the previous stage, the market for LED lighting products has been recognized and accepted. Other features of environmental protection, small size, high reliability of the LED lamps are increasingly prominent. Thus developed a series of products will be completely different from the traditional light source applications become very popular. The lighting industry will be a more open space for development. Light source is no longer only play a role in lighting, it s changing bit by bit in making more appropriate for people working and living. The fight by the various manufacturers is to design application advantage.


Phase II: LED lighting intelligent control


With the development of things such as new technology, LED, as the semiconductor industry, will also catch this tour high-speed train to play out its high controllability. From home to office buildings, from the road into the tunnel from the car to walk from the auxiliary light ing to the main lighting with smd led bulbs lighting intelligent control systems will give mankind a higher level of service. LED lighting industry will also be doing product design product, to providing total solutions to the course.


Stage 3: LED lighting alternative to accept


This phase is mainly luminous efficiency (energy consumption), and long life LED lamps in the early stages of development. Because the price was high, so at this stage for the business according to the market. The customer has an acceptable process, the first transition and on the habits and appearance. The consistent use of traditional light sources, LED lighting reflects the energy saving, longevity and other features make the market easier to accept the relatively high prices. Especially in commercial situations. The fight by the various manufacturers is the quality and price advantage.

LED lighting key design issues is a comprehensive analysis of

Web Design And Seo For www.china-webdesign.com

led wall lights - China Manufacturer

Thank you for inquiry my led wall lights, Tel:+86-574-87641051 E-MAIL:sales@everlightings.com

http://www.everlites.com/led-wall-lights/

A semiconductor lighting applications


1, heat


2, the lack of standards, mixed products


3, the price and design quality, and ultimately consumers select the downlight led lighting, lack of confidence


4, semiconductor lighting and traditional lighting in electrical design are very different, the traditional lighting companies need experience / skill accumulation process


5, we are bullish on the market, but also the scale


Features:


1, by adjusting the precision constant current chip, ensuring consistent LED brightness, chroma, and a module for downstream customers provides a standard, customized, reliable, high-quality products;


Old and new lighting design manufacturers, not to be too complex electrical design, just in the external simple circuit design coupled with traditional constant voltage power supply to work, is the fastest and most reliable way;


(3) to solve large-scale LED lighting market on the amount of technology and quality.


Second, the thermal design
< br />
1, the shortest thermal spread path, reduce the heat conduction resistance;


2, increasing the mutual conduction area, increase the speed of thermal spread;


3, a reasonable calculation of the design of cooling area;


And effective use of the heat capacity effect.


The output drive voltage selector:


20W less than the electric drive 48V or so more appropriate;


Large power mains-driven output voltage of about 36V is the most appropriate;


Most of the off-line lighting is 12V and 24V.


Features:


Load the appropriate drive voltage value based on the series and parallel security considerations, and try to unify the voltage to reduce the cost of power supply design specifications;


Based on safety regulations, product design to meet the certification requirements, flow peak exceed 42.4Vac of or DC more than 60 Vdc voltage;


From the technical and quality problems to solve large-scale on the amount of the LED lighting market to consider.


Third, most efficient back-end driver


When the output voltage of about 48V, low dropout linear constant current devices constant current efficiency up to 99%, the current precision is within ± 3%, without any peripheral devices impact; when the output voltage of about 36V, Low Dropout Linear Constant flow device constant current efficiency up to 98.6%, less than the current precision ± 3%, without any peripheral devices impact; even in the off-line lighting part, the lower voltage of 12V and 24V respectively 96% and 98% efficiency; the efficiency of the power level is equal.


Features: the most efficient drive constant current structure; on the most high-precision constant current, the impact of peripheral devices smallest; simple, convenient and practical.

< br />Constant current power consumption has reached a led lighting fixture level


In the Shenzhen CYT company laboratory, we have verified to the back-end constant current efficiency of 99.99375%, to the point of completely ignored;


The next one year to complete this design achievement, the IC design team of more than 10 people and a strong co-operation of the power supply manufacturers, this goal will be completed as soon as possible.