Air conditioner indoor and outdoor unit communication circuit and air conditioner
A communication circuit, indoor and outdoor technology, used in air conditioning systems, space heating and ventilation, mechanical equipment, etc., can solve the problems of easy communication interference and increased costs, and achieve the effect of avoiding interference and reducing costs.
Active Publication Date: 2021-10-22
GUANDONG GIWEE TECH CO LTD
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Problems solved by technology
[0007] The main purpose of the present invention is to provide a communication circuit for indoor and outdoor units of an air conditioner and an air conditioner, aiming to solve the technical problems of increased cost and easy interference of communication caused by the existing shared N line
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[0031] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0032] refer to Figure 1-Figure 3 , the present invention proposes a communication circuit for indoor and outdoor units of an air conditioner, including an outdoor unit sending module 1, an outer unit receiving module 2, an inner unit receiving module 3, an inner unit sending module 4, a weak current grounding terminal GND-24 and a voltage regulation rectifier circuit 5 ;Outside machine sending module 1 is connected with the outside machine sending terminal OUT-TXD, when the outside machine sending terminal OUT-TXD inputs a high level, the outside machine sending module 1 conducts, when the outside machine sending terminal OUT-TXD inputs a low level, the outside machine The sending module 1 is closed; the receiving module 2 of the external machine is connected to the sending module 1 of the external machine, and conn...
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The invention discloses a communication circuit for indoor and outdoor units of an air conditioner and an air conditioner. The circuit includes: an outdoor unit sending module, an outdoor unit receiving module, an inner unit receiving module, an inner unit sending module, a weak current grounding terminal, and a voltage regulating and rectifying circuit. The circuit, the external unit receiving module, the external unit transmitting module, the internal unit receiving module, the internal unit transmitting module and the weak current grounding terminal are sequentially connected in series to form a circuit; the voltage regulation and rectifying circuit is used to convert the AC power of the main control board of the internal unit into DC power, and Power the loop. The beneficial effect of the present invention is that: the voltage regulating and rectifying circuit is used to convert the alternating current of the main control board of the internal machine into direct current, and supply power for the loop, and supply power for the loop for the weak current, avoiding sharing the N line, ensuring the internal and external units On the basis of mutual communication between them, the interference of other devices on the communication can be avoided, and because the first connection line S' is independent of the N line, thin lines can be used to meet the requirements of use and reduce costs.
Description
technical field [0001] The invention relates to the field of air conditioners, in particular to a communication circuit for indoor and outdoor units of an air conditioner and an air conditioner. Background technique [0002] Generally, the weak current on the main control board of the air conditioner is converted from AC 220V to low-voltage AC by a transformer, and then converted into low-voltage DC by a voltage regulator chip for use by the main control circuit. [0003] Current loop communication is commonly used in the existing air-conditioning internal unit and external unit; the current loop communication circuit divides the 220V AC power used for the electric control board of the internal machine to obtain 24V DC through resistor division, and then carries the signal on the current loop communication circuit to achieve a relatively Communication circuit for long-distance signal transmission. [0004] The above current loop communication circuit has the following probl...
Claims
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IPC IPC(8): F24F11/88F24F11/89F24F1/0003
CPCF24F11/88F24F11/89F24F1/0003H02M7/06F24F11/65F24F11/56F24F1/20
Inventor 蒲志成张智杰
Owner GUANDONG GIWEE TECH CO LTD