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Compressor and air conditioner

A compressor and input power technology, which is applied in the field of compressors, can solve problems such as the system cannot run stably and reliably, and achieve the effects of safe and stable long-term operation, stable operation, and reduced loss and cost

Active Publication Date: 2017-12-08
GUANGDONG MEIZHI COMPRESSOR
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If a small capacitor is used, the corresponding compressor cannot meet the requirements of electric control due to limitations, and the system cannot run stably and reliably

Method used

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  • Compressor and air conditioner
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specific Embodiment

[0082] like figure 1 As shown, an inverter air conditioner compressor and control circuit, the control circuit includes input power line, primary side rectifier bridge, bus capacitor, secondary side rectifier bridge, secondary side input compressor side power line; in order to save costs, the bus capacitor For non-electrolytic capacitors, this embodiment uses film capacitors, whose capacitance value C dc = 30μF;

[0083] Because the capacitance of the busbar is small and the control circuit has no power correction module, the power factor of the entire power supply is higher and the system is stable. The input power line needs to be inductive. In this embodiment, a 5mH inductance is connected in series on the input power line. The small inductance on the input side can make the power factor of the entire driving circuit above 0.9, and at the same time, the fluctuation of the power supply current can be weakened.

[0084] Because the control circuit is simple, the bus capacit...

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Abstract

The invention provides a compressor and an air conditioner. The compressor comprises a motor and a control circuit; the control circuit is connected with the motor; the control circuit comprises an input power line, a primary side rectifying bridge, a bus capacitor, a secondary side rectifying bridge and a secondary side output power line; the input power line is connected with the primary side rectifying bridge; the bus capacitor is connected with the primary side rectifying bridge in parallel; the secondary side rectifying bridge is connected with the bus capacitor in parallel; the secondary side rectifying bridge is connected with the secondary side output power line; the secondary side output power line is connected with the motor, wherein the bus capacitor is a non-polarized electrolytic capacitor, and has the capacitance of 5-100[mu]F; and the ratio of the resistance value of the secondary side output power line to the line resistance value between terminals of the motor is less than 0.1. By virtue of the compressor provided by the invention, the useless loss of the whole system is reduced, the reliability of the driving system and the compressor is improved, safe and stable long-term operation of the control circuit and the motor can be realized, the whole system is smaller in size, and the cost is lowered.

Description

technical field [0001] The invention relates to the field of compressors, in particular to a compressor and an air conditioner. Background technique [0002] The front stage of the frequency converter of the household air conditioner is an uncontrollable rectifier with single-phase power frequency AC input, and the bus capacitor uses a large electrolytic capacitor to stabilize the bus voltage. However, large electrolytic capacitors have a large volume and limited life, which greatly limits the miniaturization and service life of the system. Moreover, my country's 3C certification clearly stipulates that for household air-conditioning systems with a current of less than 16A per phase, each current harmonic limit must meet the Class A standard of IEC61000-3-2. Therefore, in order to improve the current quality of the grid side, the air conditioning system with large electrolytic capacitors needs to add a power factor correction circuit, which increases the loss and cost of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P23/26H02P29/50F04B49/06
CPCH02P23/26H02P29/50F04B35/04
Inventor 向东宋万杰闫丽丽汤立宽
Owner GUANGDONG MEIZHI COMPRESSOR
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