CN-224233693-U - Communication circuit, communication device and air conditioner

CN224233693UCN 224233693 UCN224233693 UCN 224233693UCN-224233693-U

Abstract

The application discloses a communication circuit, a communication device and an air conditioner, wherein the communication circuit comprises a first sending module, a second sending module, a first monostable trigger and a second monostable trigger, the first sending module is used for outputting a first communication signal output by a first controller to the second monostable trigger through a communication wire, the second monostable trigger is used for outputting the first communication signal to the second controller, the second sending module is used for outputting a second communication signal output by the second controller to the first monostable trigger through the communication wire, and the first monostable trigger is used for outputting the second communication signal to the first controller. According to the application, the monostable trigger is used as the communication receiving circuit, and when the monostable trigger is powered, the maximum communication current is at the microampere level, so that the line loss of the communication line can be reduced, the communication line with a longer distance can be conveniently adapted, and the long-distance communication requirement can be met.

Inventors

CHEN FEIWEI
XIE ZHENWANG
XIONG JUN

Assignees

广东TCL智能暖通设备有限公司

Dates

Publication Date: 20260512
Application Date: 20250528

Claims (10)

1. A communication circuit, the communication circuit comprising: The input end of the first sending module is used for being connected with the sending end of a first controller in the host, and the output end of the first sending module is connected with one end of a communication line; The input end of the second sending module is used for being connected with the sending end of a second controller in the slave machine, and the output end of the second sending module is connected with the other end of the communication line; The input end of the first monostable trigger is connected with one end of the communication line, and the output end of the first monostable trigger is connected with the receiving end of the first controller; The input end of the second monostable trigger is connected with the other end of the communication line, and the output end of the second monostable trigger is connected with the receiving end of the second controller; The first sending module is further used for outputting a first communication signal output by the first controller to the second monostable trigger through the communication line, the second monostable trigger is used for outputting the first communication signal to the second controller, the second sending module is further used for outputting a second communication signal output by the second controller to the first monostable trigger through the communication line, and the first monostable trigger is used for outputting the second communication signal to the first controller.
2. The communication circuit of claim 1, wherein the input of the first monostable flip-flop comprises a first trigger terminal and a first threshold terminal; the output end of the second monostable trigger comprises a second trigger end and a second threshold end; The first sending module is specifically configured to output a low-level signal to the second trigger end through the communication line according to the high-level signal output by the first controller; the first sending module is used for outputting a high-level signal to the second threshold end through the communication line according to the low-level signal output by the first controller; The second sending module is specifically configured to output a low-level signal to the first trigger end through the communication line according to a high-level signal output by the second controller, and the second sending module is configured to output a high-level signal to the first threshold end through the communication line according to a low-level signal output by the second controller.
3. The communication circuit of claim 2, wherein the first transmitting module comprises a first switch tube, a first resistor, a second resistor and a third resistor, a first end of the first switch tube is connected with one end of the first resistor and one end of the second resistor, a second end of the first switch tube and the other end of the second resistor are both connected with electricity, a third end of the first switch tube is connected with one end of the communication line and one end of the third resistor, the other end of the third resistor is connected with electricity, and the other end of the first resistor is used for being connected with a transmitting end of the first controller.
4. The communication circuit according to claim 3, wherein the second transmitting module comprises a second switching tube, a fourth resistor and a fifth resistor, a first end of the second switching tube is connected with one end of the fourth resistor and one end of the fifth resistor, a second end of the second switching tube and the other end of the fifth resistor are grounded, the other end of the fourth resistor is used for being connected with a transmitting end of the second controller, and a third end of the second switching tube is connected with the other end of the communication line.
5. The communication circuit of claim 4, wherein the first switching tube and the second switching tube each comprise a triode, the first end of the first switching tube and the first end of the first switching tube are bases of the triode, the second end of the first switching tube and the second end of the second switching tube are emitter connections of the triode, and the third end of the first switching tube and the third end of the second switching tube are collectors of the triode.
6. A communication circuit, the communication circuit comprising: The input end of the first sending module is used for being connected with the sending end of a first controller in the host, and the output end of the first sending module is connected with one end of a communication line; The input end of the second sending module is used for being connected with the sending end of a second controller in the slave machine, and the output end of the second sending module is connected with the other end of the communication line; the inverting input end of the first comparator is connected with one end of the communication line, and the output end of the first comparator is connected with the receiving end of the first controller; The inverting input end of the second comparator is connected with the other end of the communication line, and the output end of the second comparator is connected with the receiving end of the second controller; the first sending module is further used for outputting a first communication signal output by the first controller to the second comparator through the communication line, the second comparator is used for outputting the first communication signal to the second controller, the second sending module is further used for outputting a second communication signal output by the second controller to the first comparator through the communication line, and the first comparator is used for outputting the second communication signal to the first controller.
7. The communication circuit according to claim 6, wherein the first transmitting module includes a third switching tube, a sixth resistor, a seventh resistor and an eighth resistor, a first end of the third switching tube is connected to one end of the sixth resistor and one end of the seventh resistor, the other end of the sixth resistor is connected to the transmitting end of the first controller, a second end of the third switching tube and the other end of the seventh resistor are grounded, a collector of the third switching tube is connected to one end of the eighth resistor and one end of the communication line, and the other end of the eighth resistor is electrically connected.
8. The communication circuit of claim 7, wherein the second transmitting module comprises a fourth switching tube, a ninth resistor and a tenth resistor, a first end of the fourth switching tube is connected with one end of the ninth resistor and one end of the tenth resistor, the other end of the ninth resistor is used for being connected with a transmitting end of the second controller, a second end of the fourth switching tube and the other end of the tenth resistor are grounded, and a third end of the fourth switching tube is connected with the other end of the communication line.
9. A communication device comprising a circuit board on which the communication circuit of any one of claims 1-8 is integrated.
10. An air conditioner, characterized in that the air conditioner comprises a host machine and a slave machine, the host machine comprises a first controller, the slave machine comprises a second controller, and the first controller and the second controller are connected through a communication circuit according to any one of claims 1-8.

Description

Communication circuit, communication device and air conditioner Technical Field The present application relates to the field of electronic technologies, and in particular, to a communication circuit, a communication device, and an air conditioner. Background In the current air conditioning system, the multi-split air conditioner and the unit air conditioner are increasingly widely applied. With the continuous expansion of the building scale and the increase of the coverage area of an air conditioning system, the problem of the communication distance between an inner machine and an outer machine is gradually highlighted. Conventional air conditioner communication schemes are generally designed based on limited line loss ranges, and are generally difficult to meet the ultra-long distance communication requirements. When the distance between the internal machine and the external machine exceeds a certain range, the signal transmission quality can be drastically reduced, so that communication is interrupted or data transmission is wrong, and the normal operation and control precision of the air conditioning system are seriously affected. Disclosure of utility model The communication circuit, the communication device and the air conditioner provided by the application can effectively relieve the problem that the current communication circuit is difficult to meet the requirement of remote communication. The application provides a communication circuit, which comprises: the input end of the first transmission module is used for being connected with the transmission end of the first controller in the host, and the output end of the first transmission module is connected with one end of the communication line; the input end of the second sending module is used for being connected with the sending end of the second controller in the slave machine, and the output end of the second sending module is connected with the other end of the communication line; The input end of the first monostable trigger is connected with one end of the communication line, and the output end of the first monostable trigger is connected with the receiving end of the first controller; The input end of the second monostable trigger is connected with the other end of the communication line, and the output end of the second monostable trigger is connected with the receiving end of the second controller; The first sending module is also used for outputting a first communication signal output by the first controller to the second monostable trigger through a communication line, the second monostable trigger is used for outputting the first communication signal to the second controller, the second sending module is also used for outputting a second communication signal output by the second controller to the first monostable trigger through the communication line, and the first monostable trigger is used for outputting the second communication signal to the first controller. In some embodiments, the communication circuit comprises a first monostable trigger, a second monostable trigger, a first threshold and a second threshold, wherein the input end of the first monostable trigger comprises a first trigger end and a first threshold end; The first sending module is specifically used for outputting a low-level signal to the second trigger end through a communication line according to a high-level signal output by the first controller; the second sending module is specifically configured to output a low-level signal to the first trigger end through the communication line according to a high-level signal output by the second controller, and the second sending module is configured to output a high-level signal to the first threshold end through the communication line according to a low-level signal output by the second controller. In some embodiments, the communication circuit comprises a first switch tube, a first resistor, a second resistor and a third resistor, wherein a first end of the first switch tube is connected with one end of the first resistor and one end of the second resistor, a second end of the first switch tube and the other end of the second resistor are both connected with electricity, a third end of the first switch tube is connected with one end of a communication wire and one end of the third resistor, the other end of the third resistor is connected with electricity, and the other end of the first resistor is used for being connected with a transmitting end of the first controller. In some embodiments, the communication circuit further includes a second transmitting module, the second transmitting module includes a second switching tube, a fourth resistor and a fifth resistor, a first end of the second switching tube is connected to one end of the fourth resistor and one end of the fifth resistor, a second end of the second switching tube and the other end of the fifth resistor are grounded, the other end of the fourth resistor is