A fixed frequency air conditioner compressor control circuit and a fixed frequency air conditioner
An air-conditioning compressor and control circuit technology, applied in pump control, machine/engine, mechanical equipment, etc., can solve problems such as abnormal startup of the compressor, and achieve the effect of improving reliability
Active Publication Date: 2018-08-14
GD MIDEA AIR-CONDITIONING EQUIP CO LTD
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Problems solved by technology
[0004] The main purpose of the present invention is to provide a fixed-frequency air-conditioning compressor control circuit, the purpose of which is to solve the problem of interference to the circuit caused by the harmonics generated when the compressor is working in the prior art, and the reactor is connected to the compressor power supply circuit for filtering , but when the compressor starts, the partial pressure of the reactor will cause the compressor to start abnormally
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Embodiment 2
[0036] Further, a third embodiment of the control circuit of the fixed-frequency air conditioner compressor of the present invention is proposed. In this embodiment, the reactor is a reactor with taps, such as figure 2 As shown, the reactor L1 has three joints, besides the joints at both ends of the winding, there is also a tap in the middle. The switch unit 3011 is that one end of the switch of the first relay RY1 is connected to the tap end of the reactor L1, and the other end of the switch is connected to one end of the reactor winding. It is greater than the inductance of the remaining section of the reactor, that is, the inductance of the section from the tap to the right end of the winding of the reactor L1 in the figure is greater than the inductance from the tap to the left end of the winding. When the compressor starts, the MCU controls the switch of the first relay RY1 to turn on through the first triode Q2, then the reactor L1 and the first relay RY1 switch are co...
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The invention provides a compressor control circuit of a fixed-frequency air conditioner and the fixed-frequency air conditioner. When a compressor is operated, an access control unit in a filter module is controlled to be connected with an inductor in the filter module in parallel by a control module after the compressor is started, the inductor is controlled to access to a power supply loop of the compressor, and harmonic waves which are generated after the compressor is started are filtered, so that the problem of abnormal start of the compressor due to low working voltage of the loading compressor because partial pressure is generated by the inductor when the inductor accesses to the power supply loop of the compressor after the compressor is started is solved, and the reliability of the compressor control circuit is increased.
Description
technical field [0001] The invention relates to the field of air conditioner control, in particular to a fixed frequency air conditioner compressor control circuit and a fixed frequency air conditioner. Background technique [0002] The fixed-frequency air conditioner works under relatively harsh working conditions. For example, in areas with high ambient temperature, the cooling capacity is required to meet the requirements. At this time, the power of the compressor that needs to be matched is larger than that under other normal working conditions, and the compressor continues to work at high current. Harmonic interference will be generated under the state. For some areas with strict EMC requirements, in order to pass the IEC EMC harmonic current standard, some fixed-frequency air conditioners need to add a reactor circuit with a certain inductance to filter the harmonics, and pass the harmonic current test. , but due to the increase of the inductance of the reactor, it wil...
Claims
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IPC IPC(8): F04B49/06H02P1/02
CPCF04B49/06H02P1/02
Inventor 黄国超
Owner GD MIDEA AIR-CONDITIONING EQUIP CO LTD