Air-conditioner compressor protection device and its protection method
A technology for air conditioner compressors and protection devices, which is applied in the direction of emergency protection circuit devices, electrical components, etc., and can solve problems such as compressor failure, imbalance, and poor operation of compressor 1, and achieve the effect of improving quality
Inactive Publication Date: 2007-12-12
LG ELECTRONICS (TIANJIN) APPLIANCES CO LTD
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Problems solved by technology
[0006] However, if the IPM PCB (printed circuit board) that supplies power to the compressor 1 has poor soldering or a short circuit, or if the IPM PCB is incorrectly assembled, or if the PCB components of the compressor drive unit 2 are damaged, or damage to the filter or fuse, or poor assembly of the terminals of the variable speed compressor, etc., in any of the above cases, there will be an imbalance between the three phases in the power supply unit that supplies power to the compressor 1, will cause compressor 1 to malfunction
[0007] In particular, in the prior art, the power supplied to the compressor through the IPM will cause the compressor to fail due to the overload current and the limited current sensing mode operation before the power is supplied to the IPM
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[0032] Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings.
[0033] The present invention provides an air conditioner compressor protection device, which mainly includes a compressor, and also includes a compressor drive unit 104 that receives AC power and converts it into DC power and supplies it to the compressor; senses the interphase current of the compressor drive unit 104 to convert the power supply, and This controls the motor protection relay 106 that supplies power to the compressor.
[0034] The air conditioner of the embodiment of the present invention is a central air conditioner. Fig. 1 is a schematic diagram of the central air conditioner of the present invention. Fig. 2 is a structural diagram of the central air conditioner of the present invention. Fig. 3 is a block diagram of the driving circuit of the air conditioner compressor of the present invention. Fig. 4 is a flow c...
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The invention discloses air-condition compressor protection device and protecting method, the protection device mainly includes compressor, compressor drive; motor protection relay which controls power of compressor. The protecting method includes following steps: transmitting drive signal to compressor based on judging result of control part; motor protection relay which is set between drive part and compressor senses current input to power of compressor; step of comparing the windage of current with preset current stored in motor protecting relay; when the windage of current is bigger than said preset current, power for compressor is cut off. The benefit effects of the invention are: the invention senses unbalance degree of current windage, controls input power to protect compressor, so quality of product can be increased.
Description
technical field [0001] The invention relates to an air conditioner compressor protection device and a protection method thereof. Background technique [0002] Fig. 6 is a block diagram of a prior art compressor driving circuit. [0003] As shown in Fig. 6, the air conditioner of the conventional technology includes a compressor 1, a compressor driving part 2 for supplying power to the above-mentioned compressor 1, a power supply part 3 for supplying power to the compressor driving part 2, and a control driving part 2 and a power supply part 3 The control part 4. [0004] The power supply unit 3 supplies AC power to the compressor driving unit 2, and the compressor driving unit 2 converts the AC power into DC power, and the converted DC power is connected to the compressor 1 through an Intelligent Power Module (IPM). [0005] In addition, the power supplied to the compressor 1 is AC three-phase power U, V, W. [0006] However, if the IPM PCB (printed circuit board) that su...
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IPC IPC(8): H02H7/08H02H7/085H02H7/09
Inventor 李俊硕
Owner LG ELECTRONICS (TIANJIN) APPLIANCES CO LTD