Foreword

With the constant improvement of people’s living standard, the popularity of the electrical home appliances in life is higher and higher, meanwhile, people’s requirements for electrical home appliances are higher and higher. The refrigerator can’t be just frozen, the washing machine can not just do washing, and the air conditioner must not be only satisfied with refrigerating, making heat either, also want energy-conservation, pay attention to efficiency. In order to meet the high requirements for the electrical home appliances of people, high-standard, numerous manufacturers rack one’s brains all without exception, cater to consumers making some changes. But can really move consumers, make it pay the bill, I’m afraid it is actually few, the electrical home appliances of frequency conversion are one kind in this is few.

Energy-conserving principle of a frequency conversion

What is called frequency conversion adjusts the speed, supply power through changing the frequency of the power changes the rotational speed of the motor, in order to realize energy-conservation and raise the efficiency.

The basic principle that frequency conversion adjusts speed technology is to input the relation that the frequency is directly proportional to according to rotational speed and working power of electrical machinery, namely

n =60f 1- s /p

In the type: N is the rotational speed of the motor;

F inputs the frequency for the working power;

S transfers to difference rate for the motor;

P is the electrical machinery magnetic pole logarithm.

Through change motor supply power power frequency achieve the goal of changing the electrical machinery rotational speed. Frequency converter to on the basis of above-mentioned principle, collect, hand in – frank – hand in electric electron, vary technology, microcomputer control technology, mean comprehensive electric product all over.

Take air conditioner as examples,frequency conversions so-called air conditioner and traditional constant frequency air conditioner comparatively speaking. As everyone knows, the electric voltage of market of China is 220V/50Hz, the air conditioner working under this kind of condition is called the air conditioner of the constant frequency. The frequency can’t change because of supplying power, the rotational speed of the compressor of the traditional constant frequency air conditioner does not basically change, rely on its temperature-controled switch to make, stop the compressor constantly to adjust the indoor temperature, first it is apt to cause the room temperature to be cold one minute and hot next to hold while stopping, and consume more electric energy. And the frequency that the frequency conversion air conditioner changes the compressor to supply power through the frequency converter, regulate the compressor rotational speed. Frequency of supplying power is high, the compressor is quick in rotational speed, the air conditioner refrigerates heat Quantity is great; And when the frequency is lower to supply powering, the air conditioner refrigerates heat Quantity is small. Rely on the speed of the compressor rotational speed to achieve the goal of controlling the room temperature, fluctuate at room temperature the small, electric energy is consumed little, its comfortableness is improved greatly. In addition, frequency conversion air conditioner can choose to make heat, refrigerate and dehumidify the way of turning round automatically according to the ambient temperature, make the room reach the temperatures needed rapidly within short time. And fluctuate under low rotational speed, low energy consumption state with less temperature difference and realize fast, energy-conservation and comfortable result of controlling the temperature.

The core of the air conditioner of frequency conversion is a frequency converter, a kind of new and high technology that it was in the eighties of the 20th century that the frequency converter came out, realize motor turn round automatic regulation of frequency, to fix frequency of the electric wire netting, transform to the change frequency of 30- 130Hz 50Hz through it, make the air conditioner finish a new revolution. Meanwhile, make the intersection of power and the intersection of voltage and range reach 142- 270V, can’t solve cause normal difficult problem of work by unstability of the voltage of the electric wire netting air conditioner completely still. When the air conditioner of frequency conversion begins to use each time, usually let the air conditioner make heat or refrigerate with maximum power, maximum air volume, close to the temperatures presumed rapidly. By way of improving the compressor operating frequency because of the air conditioner of frequency conversion, the ones that have increased at low temperature have made heat ability, the most greatly can reach to make heat with 1 of the brand, air conditioner at the same level. 5 times, can still keep good making heat result at low temperature. In addition, only shelf wind speed 4 of general split air conditioner is suitable for regulating, when the indoor air blower of the frequency conversion air conditioner runs automatically, the rotational speed will be changed with the operating frequency of the compressor within the range of 12 of wind speed, because it is comparatively rational for the rotational speed of the air blower to cooperate with ability of the air conditioner, have realized the quiet operation with low noise. After the high power of the air conditioner operates, close to the temperatures presumed rapidly, the compressor operates in low rotational speed, low energy consumption state, temperature in order to keep presuming. Like this not only the temperature is steady, avoiding the compressor because frequently starts the impact on fuselage life-span, and make power consumption drop greatly, has realized the energy-efficient.

2 frequency conversion electrical home appliances

2.1 Frequency conversion refrigerator

The frequency conversion refrigerator has three major characteristics:

1Raise efficiency and energy-conservation of refrigerating, utilize fuzzy best operation which controls the implementation system of the principle;

2Refrigerate fast;

3The fluctuating range of the temperature is smaller than the ordinary refrigerator.

It is reported, the group company of China Guangdong Kelon has already succeeded in developing the frequency conversion refrigerator of first of China recently – -Kelon BCD- 272 / frequency conversion refrigerator of the Model HCP, it increases the control system of frequency conversion on the basis of original BCD- 272 / HC refrigerator, adopt and import frequency conversion compressor and driver to develop specializedly. The rotational speed of the compressor of refrigerator of this frequency conversion is changed among 2000-4000r/min. When the temperature is very high in the refrigerator, frequency conversion compressor can reach 4000r/min to operate the speed, make the temperature in the refrigerator reduce rapidly, thus guarantee to refrigerate fast; And when the temperature is lower in the refrigerator, frequency conversion compressor can realize that operate at a low speed, thus achieve the energy-conserving goal. Show according to the function test to the frequency conversion refrigerator of first of Kelon, its frozen ability is improved by 20% than the ordinary refrigerator, it is improved by about 40% than the ordinary refrigerator that energy-conserving, but the noise has reduced 2- 3dB.

2.2 Washing machine of frequency conversion

The washing machine of frequency conversion is put out by Japanese Mitsubishi Company at first, the manufacturer of New Zealand has introduced the stiring washing machine of frequency conversion too subsequently, Europe and Japan is developing the cylinder washing machine of frequency conversion at present.

The washing machine of frequency conversion has three major characteristics too:

1Improve the clean result after the washing machine adopts the electrical machinery of frequency conversion, it washes, dehydration is adjustable in speed, can confirm different washing, dehydration speed to the clothes of different textures, thus make cleaning leading and abrading rate of the clothes achieve maximum efficacy;

2The energy-conserving general washing machine electrical machinery efficiency is only 40% – 50% , And the efficiency of the frequency conversion washing machine can be more than 80%, power saving;

3It is smaller than the single-phase reaction electrical machinery to reduce the electromagnetic noise of the noise frequency conversion electrical machinery, turned mechanical actuator into a direct drive way at the same time, reduced the noise of mechanical drive.

According to media, cygnet’s company has taken the lead in carrying on the developmental research of the washing machine of frequency conversion in China at present, and succeed and become the first company producing washing machine of frequency conversion of China. It produced ” Frequency conversion king ” Washing machine characteristic all can have and energy-conservation have and squelch muting wash, adopt, transfer the intersection of speed and systematic direct current, brush the electrical machinery of frequency conversion while being electrodeless.

2.3 Air conditioner of frequency conversion

It is reported that, one of the main reasons why the electricity is tense that it is caused that the power consumption caused by popularization of the air conditioner products in people’s life is increased this summer severely. So how reduce energy consumption of air conditioner, the intersection of air conditioner and issue of product not merely, also an important issue related to national economic development.

And the frequency conversion air conditioner has the following advantages: Energy-conservation, having long performance life needn’t frequently open and shut down , result stress especially and the constant temperature is comfortable temperature difference fluctuates littly, have prevented effectively ” The air conditioner disease ” , the noise is low, whole craft advanced person,etc..

It is reported, the air conditioner of China’s frequency conversion started since 1996, the market of air conditioner of frequency conversion obtained development at full speed during short a few years. But slow down to development speed for 2002 2000, this because constant speed air conditioner and frequency conversion air conditioner in price difference even relatively loud on one hand mainly, on the other hand because some influence directed against the unfavorable speech of air conditioner of frequency conversion. Viewing from the point of coming in price, the insider thinks, through the air conditioner trade ” price war ” in two years The update with the air conditioner technology of frequency conversion, the air conditioner of the constant speed and price of the frequency conversion air conditioner have been already pretty much the same at present, according to comprehensive cost performance, the intersection of frequency conversion and air conditioner certainly will become future the intersection of air conditioner and mainstream of market in place of the intersection of constant speed and air conditioner.

3 concludes the speech

In recent years, the electrical home appliances of frequency conversion are at the stage when is popularized and applied in an all-round way, especially frequency conversion air conditioner, starting with its low frequency, start the low electric current, refrigerate and make hotly fast, energy-conservation waits for the characteristic and receives the masses of consumers’ favor. According to market situation, the air conditioner of frequency conversion obtained great promotion at the end of last year and the beginning of this year, the first three months of this year, frequency conversion air conditioner is sold and increased by more than 200% compared with the same period last year. According to external environment condition, concern and consumers’ gradual approval of more producers, the development of the air conditioner of frequency conversion has already possessed the development environment of good opportunity, favorable geographical location and support.