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I. Overview
MK series electrodeless lamps are developed and produced by Mianyang Mianke Electronic Technology Co., Ltd., and have been used in batches in many different occasions. From the measured data, the MK series electrodeless lamps have a good effect and fully meet the design requirements. MK series electrodeless lamps have different technical characteristics from other electrodeless lamps, and have taken an important step towards completely solving the bottleneck of restricting the development of electrodeless lamps. Mianke Electronic Technology Co., Ltd. has developed 10W~200W series induction lamps, integrated lamps in 10W~35W, and split lights in 35W and above.
Second, what is the electrodeless lamp
Promise gas discharge lamp lighting technology is an interdisciplinary emerging technology, which involves many fields such as power electronics technology, gas discharge and luminescence theory, plasma theory, electromagnetic field theory, etc. It is a scientific and technological achievement that can be achieved by combining various disciplines. . The electric energy required for the operation of the electrodeless lamp is electromagnetically induced into the bulb, and the mixed vapor of the low-pressure mercury and the inert gas in the electrodeless bulb is ionized into a plasma. When the excited mercury atom returns to the ground state, the wavelength is The 253.7 nm ultraviolet light illuminates the three primary color phosphors on the inner wall of the bulb to convert ultraviolet light (invisible light) into visible light. Promise gas discharge lamps have many advantages that many existing light sources do not have, such as more energy saving, long service life, good color rendering, instant start, high power factor, etc., so the research of induction lamp lighting system has practical application value and potential. Great business value. The design of the electrodeless lamp has been proposed for almost 100 years, but only in the last 20 years has made great progress. There is a debate about the development of high-frequency or low-frequency lamps. The difference between low-frequency lamps and high-frequency lamps is that their operating frequencies are: 230KHz and 2650KHz. We firmly believe that high-frequency is the development direction of induction lamps.
Third, the eight misunderstandings of low frequency induction lamps
1. The International Standard [CISPR15] (the fourth edition of 1992) issued by the International Committee on Radio Interference (CISPR), a subsidiary of the International Electrotechnical Commission (IEC), specifies that electromagnetic induction lamps can be used with two operating frequencies: (I), 13.65MHz, Japan's Panasonic's Everlight electrodeless fluorescent lamp is working in this band. II, 2.2 ~ 3MHz band. It is between medium and short waves and is rarely used for radio broadcast and reception. The Philips QL Promise Fluorescent Lamp and the General Electric Genura Promise Fluorescent Lamp from the Netherlands have chosen this band, they all work at 2.65MHz (ie 2650KHz). 2400M~2500MHz is a non-communication segment, and the microwave oven works in this band. Today's microwave sources also use this frequency. The 230KHz or left and right frequency of the electrodeless lamp operating frequency is an illegal frequency band that is not recognized by international organizations. It has the same frequency interference that is extremely difficult to eliminate in aviation, communication, broadcasting, radio and other equipment, and there is a possibility of being banned in the future.
2. Since the working frequency is only one tenth of the original, the volume of the corresponding magnetic component is also increased by 10 times, and the coupling amount of the coupler is increased from about 7 μH to about 80 μH, and two are required. The volume of the magnetic components within the power supply is also greatly increased.
3, the external device of the coupler solves its heat dissipation problem, but the coupler is completely exposed in the space, and half of the electromagnetic energy is wasted and become a source of interference. The operating frequency of the low-frequency induction lamp is 10 times lower than that of the high frequency, but it is nearly 10 times higher than the operating frequency of the energy-saving lamp ballast. The unobstructed free radiation in space is definitely a technical step backward.
4, the user in the process of using low-frequency lights, there is always the feeling of stroboscopic, according to the working frequency of more than 200 K should not have this problem, certainly there are some technical deficiencies.
5. The shape of the low-frequency lamp is very special, it is difficult to manufacture, the cost will increase, and it is difficult to be miniaturized, so it is difficult to popularize into the family.
6, require special lamps to match with: 1 shape dedicated; 2 to have a shielding function. Once the cost of the dedicated lamp is doubled, the cost of the whole lamp increases, and it is difficult to lower it.
7. A number of foreign large-scale lighting companies represented by Osram have recently applied for all patents related to low-frequency electrodeless lamps in the world, and they have only waited for us to drill into its patent traps. Drink blood. There are no patent traps for high frequency lights.
8. Practice has proved that low-frequency lamps are more prone to stop vibration than high-frequency lamps, that is, they are suddenly turned off. The more difficult it is to compare the two in a harsh environment, this is an indisputable fact.
Fourth, the technical problems of high frequency electrodeless lamps
1. The heat of the coupler in the bulb cavity is too large, so that the power of the lamp cannot be higher than 165W.
The function of the coupler is to transmit the high-frequency electromagnetic waves generated by the high-frequency electromagnetic generator to the bubble body as little as possible to excite the fluorescent light. This link is very important, but it is difficult to have a few to do well. The coupler is essentially the transmitting antenna, there must be impedance matching, and there is a problem of the size of the standing wave ratio. Only when the impedance is matched, the standing wave ratio is the smallest and the emission efficiency is the highest. The electrodeless lamp is indeed very energy efficient, but according to test data, it still accounts for at least 46% of the total energy consumption. The coupler of the high-frequency electrodeless lamp is placed in the cavity of the electrodeless lamp body. When the lamp body emits light, the heat of the coupler in the cavity is very high due to the magnetic loss of the coupler, the copper loss and the heat of the lamp body. High, has exceeded 260 ° C, close to the Curie temperature point of the coupler magnetic component. The trouble is that these constant heats are difficult to dissipate due to the shape constraints of the cavity. There are three ways to dissipate heat: conduction, convection, and radiation. Since the coupler is enclosed in the cavity, only one way of conducting heat is provided. This kind of heat dissipation method is not efficient, and it requires a large amount of precious metals such as copper and aluminum. In fact: it is this kind of heat dissipation that restricts the power expansion of the electrodeless lamp, and the research and development work of the electrodeless lamp has been faltering. We have taken four technical measures and applied for three national invention patents to protect and support the new progress in the development of induction lamps.
1. Change the outer shape of the bubble body so that the coupler can not only conduct heat conduction but also convective heat dissipation.
2. Change the shape and material of the coupler strut, replace the copper rod with aluminum tube, and strengthen the chimney effect of heat dissipation by technical means, thereby improving the effect of convection heat dissipation.
3. The spraying process of changing the phosphor powder inside the bulb is not sprayed on the inner cavity portion. This brings two benefits: First, due to the lack of this glowing phosphor (the original light is hidden in the cavity is wasted), so that the heat source of the inner cavity is reduced, the working environment of the coupler Also greatly improved. Second, the lack of this phosphor can improve the permeability of electromagnetic waves, and also significantly reduce the consumption of electromagnetic power. The excuse that all people attack the induction lamp with low luminous efficiency will no longer exist, and the electrodeless lamp will be difficult from the original. 68Lm/W can be raised to more than 80Lm/W.
4. The aluminum radiator at the nozzle of the lamp body is replaced with ordinary plastic parts, the cost and volume are greatly reduced, and the technical indicators are improved. This creates sufficient and necessary conditions for the induction lamp to enter the home.
MK series electrodeless lamps are developed and produced by Mianyang Mianke Electronic Technology Co., Ltd., and have been used in batches in many different occasions. From the measured data, the MK series electrodeless lamps have a good effect and fully meet the design requirements. MK series electrodeless lamps have different technical characteristics from other electrodeless lamps, and have taken an important step towards completely solving the bottleneck of restricting the development of electrodeless lamps. Mianke Electronic Technology Co., Ltd. has developed 10W~200W series induction lamps, integrated lamps in 10W~35W, and split lights in 35W and above.
Second, what is the electrodeless lamp
Promise gas discharge lamp lighting technology is an interdisciplinary emerging technology, which involves many fields such as power electronics technology, gas discharge and luminescence theory, plasma theory, electromagnetic field theory, etc. It is a scientific and technological achievement that can be achieved by combining various disciplines. . The electric energy required for the operation of the electrodeless lamp is electromagnetically induced into the bulb, and the mixed vapor of the low-pressure mercury and the inert gas in the electrodeless bulb is ionized into a plasma. When the excited mercury atom returns to the ground state, the wavelength is The 253.7 nm ultraviolet light illuminates the three primary color phosphors on the inner wall of the bulb to convert ultraviolet light (invisible light) into visible light. Promise gas discharge lamps have many advantages that many existing light sources do not have, such as more energy saving, long service life, good color rendering, instant start, high power factor, etc., so the research of induction lamp lighting system has practical application value and potential. Great business value. The design of the electrodeless lamp has been proposed for almost 100 years, but only in the last 20 years has made great progress. There is a debate about the development of high-frequency or low-frequency lamps. The difference between low-frequency lamps and high-frequency lamps is that their operating frequencies are: 230KHz and 2650KHz. We firmly believe that high-frequency is the development direction of induction lamps.
Third, the eight misunderstandings of low frequency induction lamps
1. The International Standard [CISPR15] (the fourth edition of 1992) issued by the International Committee on Radio Interference (CISPR), a subsidiary of the International Electrotechnical Commission (IEC), specifies that electromagnetic induction lamps can be used with two operating frequencies: (I), 13.65MHz, Japan's Panasonic's Everlight electrodeless fluorescent lamp is working in this band. II, 2.2 ~ 3MHz band. It is between medium and short waves and is rarely used for radio broadcast and reception. The Philips QL Promise Fluorescent Lamp and the General Electric Genura Promise Fluorescent Lamp from the Netherlands have chosen this band, they all work at 2.65MHz (ie 2650KHz). 2400M~2500MHz is a non-communication segment, and the microwave oven works in this band. Today's microwave sources also use this frequency. The 230KHz or left and right frequency of the electrodeless lamp operating frequency is an illegal frequency band that is not recognized by international organizations. It has the same frequency interference that is extremely difficult to eliminate in aviation, communication, broadcasting, radio and other equipment, and there is a possibility of being banned in the future.
2. Since the working frequency is only one tenth of the original, the volume of the corresponding magnetic component is also increased by 10 times, and the coupling amount of the coupler is increased from about 7 μH to about 80 μH, and two are required. The volume of the magnetic components within the power supply is also greatly increased.
3, the external device of the coupler solves its heat dissipation problem, but the coupler is completely exposed in the space, and half of the electromagnetic energy is wasted and become a source of interference. The operating frequency of the low-frequency induction lamp is 10 times lower than that of the high frequency, but it is nearly 10 times higher than the operating frequency of the energy-saving lamp ballast. The unobstructed free radiation in space is definitely a technical step backward.
4, the user in the process of using low-frequency lights, there is always the feeling of stroboscopic, according to the working frequency of more than 200 K should not have this problem, certainly there are some technical deficiencies.
5. The shape of the low-frequency lamp is very special, it is difficult to manufacture, the cost will increase, and it is difficult to be miniaturized, so it is difficult to popularize into the family.
6, require special lamps to match with: 1 shape dedicated; 2 to have a shielding function. Once the cost of the dedicated lamp is doubled, the cost of the whole lamp increases, and it is difficult to lower it.
7. A number of foreign large-scale lighting companies represented by Osram have recently applied for all patents related to low-frequency electrodeless lamps in the world, and they have only waited for us to drill into its patent traps. Drink blood. There are no patent traps for high frequency lights.
8. Practice has proved that low-frequency lamps are more prone to stop vibration than high-frequency lamps, that is, they are suddenly turned off. The more difficult it is to compare the two in a harsh environment, this is an indisputable fact.
Fourth, the technical problems of high frequency electrodeless lamps
1. The heat of the coupler in the bulb cavity is too large, so that the power of the lamp cannot be higher than 165W.
The function of the coupler is to transmit the high-frequency electromagnetic waves generated by the high-frequency electromagnetic generator to the bubble body as little as possible to excite the fluorescent light. This link is very important, but it is difficult to have a few to do well. The coupler is essentially the transmitting antenna, there must be impedance matching, and there is a problem of the size of the standing wave ratio. Only when the impedance is matched, the standing wave ratio is the smallest and the emission efficiency is the highest. The electrodeless lamp is indeed very energy efficient, but according to test data, it still accounts for at least 46% of the total energy consumption. The coupler of the high-frequency electrodeless lamp is placed in the cavity of the electrodeless lamp body. When the lamp body emits light, the heat of the coupler in the cavity is very high due to the magnetic loss of the coupler, the copper loss and the heat of the lamp body. High, has exceeded 260 ° C, close to the Curie temperature point of the coupler magnetic component. The trouble is that these constant heats are difficult to dissipate due to the shape constraints of the cavity. There are three ways to dissipate heat: conduction, convection, and radiation. Since the coupler is enclosed in the cavity, only one way of conducting heat is provided. This kind of heat dissipation method is not efficient, and it requires a large amount of precious metals such as copper and aluminum. In fact: it is this kind of heat dissipation that restricts the power expansion of the electrodeless lamp, and the research and development work of the electrodeless lamp has been faltering. We have taken four technical measures and applied for three national invention patents to protect and support the new progress in the development of induction lamps.
1. Change the outer shape of the bubble body so that the coupler can not only conduct heat conduction but also convective heat dissipation.
2. Change the shape and material of the coupler strut, replace the copper rod with aluminum tube, and strengthen the chimney effect of heat dissipation by technical means, thereby improving the effect of convection heat dissipation.
3. The spraying process of changing the phosphor powder inside the bulb is not sprayed on the inner cavity portion. This brings two benefits: First, due to the lack of this glowing phosphor (the original light is hidden in the cavity is wasted), so that the heat source of the inner cavity is reduced, the working environment of the coupler Also greatly improved. Second, the lack of this phosphor can improve the permeability of electromagnetic waves, and also significantly reduce the consumption of electromagnetic power. The excuse that all people attack the induction lamp with low luminous efficiency will no longer exist, and the electrodeless lamp will be difficult from the original. 68Lm/W can be raised to more than 80Lm/W.
4. The aluminum radiator at the nozzle of the lamp body is replaced with ordinary plastic parts, the cost and volume are greatly reduced, and the technical indicators are improved. This creates sufficient and necessary conditions for the induction lamp to enter the home.