Air conditioner protection circuit powered by DC switching power supply and power supply communication method for air conditioner
A technology of DC switching and power supply, which is applied in the direction of conversion equipment for intermediate conversion to DC, AC networks with the same frequency from different sources, etc., which can solve problems such as burning of DC-to-AC devices, and improve effectiveness and reliability. Sex, the effect of ensuring safe use
Active Publication Date: 2017-05-03
QINGDAO HAIER AIR CONDITIONING ELECTRONICS CO LTD +1
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Problems solved by technology
[0005] This solution can solve the problem that in a system including an air conditioner powered by a DC switching power supply and an air conditioner powered by an AC transformer, when two kinds of air conditioners supply power to the AC wire controller at the same time, the DC-to-AC device in the air conditioner powered by a DC switching power supply is blocked. The problem of burning out due to short circuit
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[0031] In order to make the object, technical solution and advantages of the present invention clearer, specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only parts related to the present invention are shown in the drawings but not all content.
[0032] In the prior art, if an air conditioner powered by a DC switching power supply needs to be matched with an AC wire controller, a DC-to-AC device needs to be added to the circuit board of the air conditioner to convert the DC voltage signal into an AC voltage signal, supply power to the AC wire controller, and Communicate with the AC wire controller by controlling the form of the AC voltage signal.
[0033] figure 1 ...
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The invention discloses a protective circuit and power communication method of an air conditioner supplied by a DC switching power source. The protective circuit comprises the DC switching power source, a DC to AC converter, a protector, a detector and a processor, wherein the DC switching power source converts an input commercial-power voltage signal into a DC voltage signal, the DC to AC converter converts the DC voltage signal into an AC voltage signal according to a control signal input by the processor; the protector transmits the AC voltage signal to the power input end of an AC line controller according to a connection signal input by the processor; and the detector detects the voltage signal at the power input end of the AC line controller and transmits a detection result to the processor. The protective circuit can prevent the air conditioner supplied by the DC switching power source from being shorted and burned when the air conditioner supplied by the DC switching power source is connected with an air conditioner supplied by an AC transformer in a mixed manner.
Description
technical field [0001] The invention relates to the field of air conditioning and communication technology, and in particular to an air conditioner protection circuit powered by a DC switching power supply, an air conditioning system powered by a DC switching power supply, and a power supply communication method for an air conditioner powered by a DC switching power supply. Background technique [0002] In the field of electrical automation, how to effectively reduce power consumption is an increasingly important research topic. In the air-conditioning industry, the general air-conditioning power supply method is the AC transformer power supply method. The main disadvantages of this power supply method are that the transformer has low efficiency, large loss, and is not conducive to reducing the power consumption of the whole machine. Compared with the AC transformer power supply, the DC switching power supply mode has the advantages of high efficiency, large current supply a...
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IPC IPC(8): H02J3/04H02M5/44
CPCH02J3/04H02M5/44
Inventor 程绍江禚百田时斌
Owner QINGDAO HAIER AIR CONDITIONING ELECTRONICS CO LTD