Communication detection method and device for air conditioning system and its current loop communication circuit
A technology of current loop communication and detection method, which can be used in measuring devices, measuring electricity, measuring electrical variables, etc., and can solve problems such as damage to electronic devices
Active Publication Date: 2020-05-15
GUANGDONG MEIZHI COMPRESSOR
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- Application Information
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Problems solved by technology
However, the problem in the related technology is that since the communication circuit only needs to add a signal line in addition to the power line, if the wrong line is connected during wiring, the electronic components of the current loop circuit will be damaged.
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[0035] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.
[0036] Refer below figure 2 The air conditioning system in the embodiment of the present invention will be described. Such as figure 2As shown, the host 10 of the air-conditioning system and the slave 20 of the air-conditioning system are connected through the current loop communication circuit 30, and the host 10 of the air-conditioning system is connected with the current loop communication circuit 30 through the live line L, the neutral line N and the data line S respectively. The slave machine 20 is also connected to the ...
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The invention provides an air conditioner system, and a communication detection method and device of an electric current loop communication circuit of the air conditioner system. The communication detection method comprises steps that when the air conditioner is powered on, a transmitter optocoupler of the indoor side or the outdoor side of the electric current loop communication circuit is controlled, high level signals are continuously outputted during the first time interval, and low level signals are continuously outputted during the second time interval; for a receiving end of the indoorside or the outdoor side of the electric current loop communication circuit, whether the time of continuously receiving the high level signals is greater than the preset first time interval thresholdis determined within the first time interval, whether the time of continuously receiving the low level signals is greater than the preset second time interval threshold is determined within the secondtime interval, if yes, the indoor side and the outdoor side of the air conditioner are controlled for turning on the communication process; if not, a fault prompt is emitted, the transmitter optocoupler is controlled for continuously outputting the low level signals, and whether the electric current loop communication circuit is in fault can be accurately determined.
Description
technical field [0001] The invention relates to the technical field of air conditioners, in particular to a communication detection method and device for a current loop communication circuit. Background technique [0002] The split type air conditioner includes an indoor unit and an outdoor unit, and the indoor unit and the outdoor unit exchange data through a current loop circuit to achieve the effect of air conditioning control. However, the problem in the related technology is that, since the communication circuit only needs to add a signal line in addition to the power line, if the wrong line is connected during wiring, the electronic components of the current loop circuit will be damaged. Contents of the invention [0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. [0004] Therefore, the first object of the present invention is to provide a communication detection method for a current loop commu...
Claims
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IPC IPC(8): G01R31/50
CPCG01R31/50
Inventor 陆德强
Owner GUANGDONG MEIZHI COMPRESSOR