A three-phase electric detection method and device, and an air conditioner outdoor unit
A detection device and three-phase power technology, which is applied in the direction of multi-phase network asymmetry measurement, etc., can solve the problems of insufficient phase detection technology
Active Publication Date: 2020-02-07
QINGDAO HISENSE HITACHI AIR CONDITIONING SYST
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Problems solved by technology
Generally, the three-phase detection circuit of the air conditioner will choose to take power at the output end of the filter. In this way, if a phase loss occurs at the rear end of the filter, it will not be detected, and the above-mentioned danger will also occur. Therefore, the phase loss provided by the existing technology Detection technology is not perfect
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[0016] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0017] refer to figure 1 As shown, the embodiment of the present application is applied in the AC-DC conversion circuit, wherein the AC-DC conversion circuit includes a filter 11, a rectifier 12, the input end of the filter 11 is connected to the AC bus L1, L2, L3, and the output end of the filter 12 Connect the input terminal of the rectifier 12, and the output terminal of the rectifier 12 is connected to the DC busbars P and N; the three-phase AC power suppl...
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The embodiment of the present invention discloses a three-phase electric detection method and device and an outdoor unit of an air conditioner, which relate to the field of household appliance manufacturing, and can improve the function of phase loss detection technology and improve the stability of the system. The three-phase electrical detection method is applied to an AC-DC conversion circuit, wherein the AC-DC conversion circuit includes a filter and a rectifier, the input end of the filter is connected to the AC bus, and the output end of the filter is connected to the input end of the rectifier , the output end of the rectifier is connected to the DC bus; the three-phase alternating current is input to the filter through the AC bus; the three-phase electric detection device detects the filtered AC bus voltage at the output end of the filter, and the voltage on the DC bus; when When it is determined that the filtered AC bus voltage and the voltage on the DC bus meet a predetermined condition, it is determined that no phase loss occurs in the three-phase AC power.
Description
technical field [0001] Embodiments of the present invention relate to the field of household appliance manufacturing, and in particular to a three-phase electric detection method and device and an air conditioner outdoor unit. Background technique [0002] Many outdoor air-conditioning products use three-phase power supply for power supply. If there is a phase loss during the power-on process of the product, it will be very dangerous to the whole product. For example, the L1 phase, L2 phase, and L3 phase of the three-phase AC power supply lack phase L1 phase, and the other two phases L2 phase, L3 phase will generate large currents, which will easily cause the danger of wiring burnt and even the whole machine; if the wiring diameter is selected If it is thicker, the subsequent rectifier silicon bridge, compressor and fan motor frequency conversion module are easy to burn out. Even if they are not burned out, it will have a great impact on the life of these devices, including ...
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IPC IPC(8): G01R29/16
CPCG01R29/16
Inventor 王明张吉雪王瑞佳
Owner QINGDAO HISENSE HITACHI AIR CONDITIONING SYST