CN214891748U - Communication circuit of outdoor unit of air conditioner - Google Patents
Communication circuit of outdoor unit of air conditioner Download PDFInfo
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- CN214891748U CN214891748U CN202120556050.3U CN202120556050U CN214891748U CN 214891748 U CN214891748 U CN 214891748U CN 202120556050 U CN202120556050 U CN 202120556050U CN 214891748 U CN214891748 U CN 214891748U
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- 238000002955 isolation Methods 0.000 claims description 56
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- 230000001052 transient effect Effects 0.000 claims description 32
- 230000001629 suppression Effects 0.000 claims description 31
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- 238000012423 maintenance Methods 0.000 abstract description 6
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- 101100295842 Arabidopsis thaliana OPT4 gene Proteins 0.000 description 10
- 238000000034 method Methods 0.000 description 6
- 238000004378 air conditioning Methods 0.000 description 5
- 101100295844 Arabidopsis thaliana OPT6 gene Proteins 0.000 description 3
- 101100295845 Arabidopsis thaliana OPT7 gene Proteins 0.000 description 3
- 101100295846 Arabidopsis thaliana OPT8 gene Proteins 0.000 description 3
- 101100295847 Arabidopsis thaliana OPT9 gene Proteins 0.000 description 3
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Abstract
The application provides an air condensing units communication circuit, the circuit includes: the device comprises a selection module, an MCU control module, a zero-live line communication module and an RS485 communication module; the output end of the selection module is connected with the control end of the MCU control module, the sending end of the MCU control module is connected with the receiving end of the zero-live line communication module, the receiving end of the MCU control module is connected with the sending end of the zero-live line communication module, and the zero-live line communication module is provided with a first terminal and is used for connecting an indoor unit of an air conditioner; the sending end of the MCU control module is connected with the receiving end of the RS485 communication module, the receiving end of the MCU control module is connected with the sending end of the RS485 communication module, the enabling end of the MCU control module is connected with the driving end of the RS485 communication module, and the RS485 communication module is provided with a second terminal for connecting an indoor unit of an air conditioner; the communication circuit of the air conditioner outdoor unit can be matched with the variable-frequency air conditioner indoor unit adopting a zero-live wire communication circuit or an RS485 communication circuit, and great convenience is brought to after-sale maintenance of manufacturers.
Description
Technical Field
The application relates to the technical field of electronic information, in particular to an air conditioner outdoor unit communication circuit.
Background
At present, the communication mode of the indoor unit and the outdoor unit of the household variable frequency air conditioner mostly adopts a zero-live line communication circuit or an RS485 communication circuit. The zero-live line communication circuit uses common components such as a resistor, a capacitor, a diode, a triode, a photoelectric coupler (optical coupler for short) and the like, and does not need an additional chip, so that the hardware cost is low, and the zero-live line communication circuit is widely applied to the field of household variable frequency air conditioners; however, since the zero-live line communication circuit is limited by its own principle, the communication distance is short, and when a long-distance indoor unit and outdoor unit are required to communicate, an RS485 communication circuit with a longer communication distance is often used.
Because the household variable frequency air conditioner indoor unit is frequently used, a communication circuit of the household variable frequency air conditioner indoor unit can be damaged to a certain degree and needs to be maintained after sale by a manufacturer, the household variable frequency air conditioner indoor unit adopting the zero-live line communication circuit needs to use an outdoor unit electric control board of the zero-live line communication circuit when being maintained, and the household variable frequency air conditioner indoor unit adopting the RS485 communication circuit needs to use an outdoor unit electric control board of the RS485 communication circuit when being maintained, so the manufacturer needs to develop outdoor unit after-sale special boards with two communication modes, and the maintenance is troublesome.
SUMMERY OF THE UTILITY MODEL
An object of the embodiment of the application is to provide an air condensing units communication circuit to solve the problem that when the household variable frequency air conditioner indoor unit adopting the zero-fire line communication circuit or the RS485 communication circuit is maintained, a corresponding outdoor unit electric control board is needed to be used, and a manufacturer needs to develop outdoor unit after-sale special boards with two communication modes, so that the maintenance is troublesome. The specific technical scheme is as follows:
in a first aspect, a communication circuit for an outdoor unit of an air conditioner is provided, including: the device comprises a selection module, an MCU control module, a zero-live line communication module and an RS485 communication module;
the output end of the selection module is connected with the control end of the MCU control module, the sending end of the MCU control module is connected with the receiving end of the zero-live wire communication module, the receiving end of the MCU control module is connected with the sending end of the zero-live wire communication module, and the zero-live wire communication module is provided with a first terminal for connecting an indoor unit of an air conditioner; the sending end of the MCU control module is connected with the receiving end of the RS485 communication module, the receiving end of the MCU control module is connected with the sending end of the RS485 communication module, the enabling end of the MCU control module is connected with the driving end of the RS485 communication module, and the RS485 communication module is provided with a second terminal for connecting the indoor unit of the air conditioner;
when the selection module outputs a high level, the MCU control module sends a signal to the indoor unit of the air conditioner through a first terminal of the zero-live wire communication module;
when the selection module outputs a low level, the MCU control module sends a signal to the indoor unit of the air conditioner through the second terminal of the RS485 communication module.
Optionally, the selection module comprises: a first resistor, a second resistor and a switch;
the first connecting end of the first resistor is connected with a power supply, and the second connecting end of the first resistor is connected with the first connecting end of the switch;
the first connecting end of the second resistor is connected with the second connecting end of the switch, and the second connecting end of the second resistor is grounded;
and the control end of the switch is connected with the output end of the selection module.
Optionally, the zero-live line communication module includes: the triode, the first optocoupler, the second optocoupler, the zero live wire unit and the first terminal;
the receiving end of the zero-live wire communication module is connected with the base electrode of the triode, the emitting electrode of the triode is grounded, the collecting electrode of the triode is connected with the negative electrode of the light emitter of the first optocoupler, the negative electrode of the light emitter of the first optocoupler is connected with the power supply, and the first connecting end of the light receiver of the first optocoupler is connected with the first terminal; the second connecting end of the light receiver of the first optical coupler is connected with the cathode of the light emitter of the second optical coupler,
and a transmitting end of the zero-fire wire communication module is connected with a first connecting end of a light receiver of the second optical coupler, a second connecting end of the light receiver of the second optical coupler is connected with a power supply, and a positive electrode of a light emitter of the second optical coupler is connected with the zero-fire wire unit.
Optionally, the zero fire line unit comprises: the circuit comprises a capacitor, a first diode, a second diode, a zero line, a third resistor and a live wire;
the anode of the capacitor is connected with the cathode of the first diode and the cathode of the second diode respectively; the negative electrode of the capacitor and the positive electrode of the second diode are respectively connected with a zero line of an alternating current power supply;
the zero line is connected with a zero line of an alternating current power supply;
the anode of the first diode is connected with the first connecting end of the third resistor, and the second connecting end of the third resistor is connected with the live wire of the alternating current power supply;
the live wire is connected with the live wire of the alternating current power supply.
Optionally, the zero-live line communication module further comprises: a fourth resistor, a fifth resistor and a sixth resistor;
the first connecting end of the fourth resistor is connected with the receiving end of the zero-live wire communication module, and the second connecting end of the fourth resistor is connected with the base electrode of the triode;
the first connecting end of the fifth resistor is connected with the first connecting end of the light receiver of the first optocoupler;
the first connecting end of the sixth resistor is connected with the first connecting end of the light receiver of the second optocoupler;
and the second connecting end of the fifth resistor and the second connecting end of the sixth resistor are grounded.
Optionally, the RS485 communication module includes: the system comprises a first isolation module, a second isolation module, a third isolation module and an RS485 communication unit;
the transmitting end of the RS485 communication module is connected with the input end of the first isolation module, and the output end of the first isolation module is connected with the transmitting end of the RS485 communication unit;
the receiving end of the RS485 communication module is connected with the input end of the second isolation module, and the output end of the second isolation module is connected with the receiving end of the RS485 communication unit;
the driving end of the RS485 communication module is connected with the input end of the third isolation module, and the output end of the third isolation module is connected with the driving end of the RS485 communication unit.
Optionally, the first isolation module comprises: the third resistor is connected with the fourth optical coupler;
the input end of the first isolation module is connected with the first connecting end of the seventh resistor, and the second connecting end of the seventh resistor is respectively connected with the first connecting end of the eighth resistor and the first connecting end of the third opto-coupler light receiver; a second connecting end of a light receiver of the third optical coupler is grounded; the positive electrode of a light emitter of the third optocoupler is connected with the first connecting end of the ninth resistor, and the negative electrode of the light emitter of the third optocoupler is connected with the output end of the first isolation module;
and a second connecting end of the eighth resistor is grounded, and a second connecting end of the ninth resistor is connected with a power supply.
Optionally, the second isolation module comprises: a tenth resistor, a fourth optocoupler, an eleventh resistor and a twelfth resistor;
the input end of the second isolation module is connected with the cathode of the light emitter of the fourth optocoupler, the anode of the light emitter of the fourth optocoupler is connected with the first connection end of the tenth resistor, and the first connection end of the light receiver of the fourth optocoupler is connected with the first connection end of the eleventh resistor and the output end of the second isolation module;
a second connecting end of a light receiver of the fourth optical coupler is connected with a first connecting end of the twelfth resistor, and a second connecting end of the twelfth resistor is grounded;
and a second connecting end of the tenth resistor and a second connecting end of the eleventh resistor are respectively connected with a power supply.
Optionally, the third isolation module comprises: a thirteenth resistor, a fifth optocoupler, and a fourteenth resistor;
the input end of the third isolation module is connected with the first connection end of the thirteenth resistor, the second connection end of the thirteenth resistor is connected with the anode of the light emitter of the fifth optocoupler, the cathode of the light emitter of the fifth optocoupler is grounded, the first connection end of the light receiver of the fifth optocoupler is connected with the power supply, and the second connection end of the light receiver of the fifth optocoupler is respectively connected with the first connection end of the fourteenth resistor and the output end of the third isolation module;
and the second connection end of the fourteenth resistor is grounded.
Optionally, the RS485 communication unit includes an RS485 communication chip, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, a first magnetic bead, a second terminal, a first transient suppression diode, a second transient suppression diode, and a third transient suppression diode;
the transmitting end of the RS485 communication unit is connected with the transmitting end of the RS485 communication chip;
the receiving end of the RS485 communication unit is connected with the receiving end of the RS485 communication chip;
the driving end of the RS485 communication unit is connected with the driving end of the RS485 communication chip;
the power end of the RS485 communication chip is connected with a power supply;
the first connection end of the RS485 communication chip is respectively connected with the first connection end of the fifteenth resistor, the first connection end of the sixteenth resistor and the first connection end of the first magnetic bead; the second connection end of the first magnetic bead is connected with the first connection end of the second terminal, and the second connection end of the fifteenth resistor is connected with a power supply;
the second connecting end of the RS485 communication chip is respectively connected with the first connecting end of the seventeenth resistor, the second connecting end of the sixteenth resistor and the first connecting end of the second magnetic bead; a second connection end of the second magnetic bead is connected with a second connection end of the second terminal, and a second connection end of the seventeenth resistor is grounded;
the grounding end of the RS485 communication chip is grounded;
a first connection end of the first transient suppression diode is connected with a second connection end of the first magnetic bead, and a second connection end of the first transient suppression diode is connected with a second connection end of the seventeenth resistor;
a first connection end of the second transient suppression diode is connected with a second connection end of the second magnetic bead, and a second connection end of the second transient suppression diode is connected with a second connection end of the seventeenth resistor;
the first connection end of the third transient suppression diode is connected with the second connection end of the first magnetic bead, and the second connection end of the third transient suppression diode is connected with the second connection end of the second magnetic bead.
The embodiment of the application has the following beneficial effects:
in the embodiment of the application, when the selection module outputs a high level, the MCU control module sends a signal to the indoor unit of the air conditioner through the first terminal of the zero-live wire communication module; when the selection module outputs a low level, the MCU control module sends a signal to the indoor unit of the air conditioner through the second terminal of the RS485 communication module. The communication circuit of the air conditioner outdoor unit is provided with the zero-live wire communication circuit and the RS485 communication circuit, so that the communication circuit of the air conditioner outdoor unit can be matched with the variable-frequency air conditioner indoor unit adopting the zero-live wire communication circuit or the RS485 communication circuit, and great convenience is brought to after-sale maintenance of a manufacturer.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
Fig. 1 is a circuit diagram of an air conditioner outdoor unit communication circuit according to an embodiment of the present disclosure;
fig. 2 is a circuit diagram of a zero-live line communication circuit loop according to an embodiment of the present disclosure.
Reference numerals: the system comprises a 1-selection module, a 2-MCU control module, a 3-zero-live line communication module, a 4-RS485 communication module, a 5-zero-live line unit, a 6-first isolation module, a 7-second isolation module, an 8-third isolation module and a 9-RS485 communication unit.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Because the household variable frequency air conditioner indoor unit is frequently used, a communication circuit of the household variable frequency air conditioner indoor unit can be damaged to a certain degree and needs to be maintained after sale by a manufacturer, the household variable frequency air conditioner indoor unit adopting the zero-live line communication circuit needs to use an outdoor unit electric control board of the zero-live line communication circuit when being maintained, and the household variable frequency air conditioner indoor unit adopting the RS485 communication circuit needs to use an outdoor unit electric control board of the RS485 communication circuit when being maintained, so that the manufacturer needs to develop outdoor unit after-sale special boards with two communication modes, and the maintenance is troublesome, therefore, the embodiment of the application provides the air conditioner outdoor unit communication circuit.
An air conditioner outdoor unit communication circuit provided in an embodiment of the present application will be described in detail with reference to specific embodiments, as shown in fig. 1, the air conditioner outdoor unit communication circuit includes: the system comprises a selection module 1, an MCU control module 2, a zero-live line communication module 3 and an RS485 communication module 4;
the output end of the selection module 1 is connected with the control end of the MCU control module 2, the sending end TXD of the MCU control module 2 is connected with the receiving end of the zero-live wire communication module 3, the receiving end RXD of the MCU control module 2 is connected with the sending end of the zero-live wire communication module 3, and the zero-live wire communication module 3 is provided with a first terminal CN1 and used for being connected with an indoor unit of an air conditioner; a transmitting end TXD of the MCU control module 2 is connected with a receiving end of the RS485 communication module 4, a receiving end RXD of the MCU control module 2 is connected with a transmitting end of the RS485 communication module 4, an enabling end of the MCU control module 2 is connected with a driving end of the RS485 communication module 4, and the RS485 communication module 4 is provided with a second terminal CN2 for connecting the indoor unit of the air conditioner;
when the selection module 1 outputs a high level, the MCU control module 2 sends a signal to the indoor unit of the air conditioner through the first terminal CN1 of the zero-live line communication module 3;
when the selection module 1 outputs a low level, the MCU control module 2 sends a signal to the indoor unit of the air conditioner through the second terminal CN2 of the RS485 communication module 4.
In the embodiment of the application, when the selection module 1 outputs a high level, the MCU control module 2 sends a signal to the indoor unit of the air conditioner through the first terminal CN1 of the zero-live line communication module 3; when the selection module 1 outputs a low level, the MCU control module 2 sends a signal to the indoor unit of the air conditioner through the second terminal CN2 of the RS485 communication module 4. The communication circuit of the air conditioner outdoor unit is provided with the zero-live wire communication circuit and the RS485 communication circuit, so that the communication circuit of the air conditioner outdoor unit can be matched with the variable-frequency air conditioner indoor unit adopting the zero-live wire communication circuit or the RS485 communication circuit, and great convenience is brought to after-sale maintenance of a manufacturer.
In a further embodiment of the present application, the selection module 1 comprises: a first resistor R15, a second resistor R16 and a switch S1;
a first connection end of the first resistor R15 is connected with a power supply, and a second connection end of the first resistor R15 is connected with a first connection end of the switch S1;
a first connection end of the second resistor R16 is connected with a second connection end of the switch S1, and a second connection end of the second resistor R16 is grounded;
the control terminal of the switch S1 is connected to the output terminal of the selection module 1.
When the branch of the switch S1 and the first resistor R15 is turned on, the control terminal of the switch S1 outputs a high-level signal, and when the branch of the switch S1 and the second resistor R16 is turned on, the control terminal of the switch S1 outputs a low-level signal.
In another embodiment of the present application, the firewire and null line communication module 3 includes: the triode Q1, a first optocoupler OPT1, a second optocoupler OPT2, a zero live wire unit 5 and a first terminal CN 1;
the receiving end of the zero-live wire communication module 3 is connected with the base electrode of the triode Q1, the emitter electrode of the triode Q1 is grounded, the collector electrode of the triode Q1 is connected with the cathode of the light emitter of the first optocoupler OPT1, the cathode of the light emitter of the first optocoupler OPT1 is connected with the power supply, and the first connecting end of the light receiver of the first optocoupler OPT1 is connected with the first terminal CN 1; a second connecting end of a light receiver of the first optical coupler OPT1 is connected with a cathode of a light emitter of the second optical coupler OPT2,
the transmitting end of the zero-live wire communication module 3 is connected with the first connecting end of the light receiver of the second optical coupler OPT2, the second connecting end of the light receiver of the second optical coupler OPT2 is connected with a power supply, and the positive electrode of the light emitter of the second optical coupler OPT2 is connected with the zero-live wire unit 5.
The first optical coupler OPT1 and the second optical coupler OPT2 have the following functions: the power supplies on the left and right sides of the first optocoupler OPT1 and the second optocoupler OPT2 are isolated, so that the power supplies on the left and right sides of the first optocoupler OPT1 and the second optocoupler OPT2 are not grounded in common.
In a further embodiment of the present application, the zero line unit 5 comprises: the circuit comprises a capacitor E, a first diode D1, a second diode D2, a zero line, a third resistor R13 and a live line;
the anode of the capacitor E is connected with the cathode of the first diode D1 and the cathode of the second diode D2 respectively; the cathode of the capacitor E and the anode of the second diode D2 are respectively connected with a zero line of an alternating current power supply;
the zero line is connected with a zero line of an alternating current power supply;
the positive electrode of the first diode D1 is connected with the first connection end of the third resistor R13, and the second connection end of the third resistor R13 is connected with the live wire of an alternating current power supply;
the live wire is connected with the live wire of the alternating current power supply.
In another embodiment of the present application, the hot wire communication module 3 further includes: a fourth resistor R14, a fifth resistor R17 and a sixth resistor R1;
a first connection end of the fourth resistor R14 is connected with a receiving end of the zero-live wire communication module 3, and a second connection end of the fourth resistor R14 is connected with a base electrode of the triode Q1;
a first connection end of the fifth resistor R17 is connected with a first connection end of a light receiver of the first optocoupler OPT 1;
a first connection end of the sixth resistor R1 is connected with a first connection end of a light receiver of the second opto-coupler OPT 2;
a second connection of the fifth resistor R17 and a second connection of the sixth resistor R1 are grounded.
The fourth resistor R14 is used for limiting current and protecting the port of the MCU control module.
The fifth resistor R17 is used for pulling down the level of a circuit node between the first optocoupler 0PT1, the fifth resistor R17 and the first terminal CN 1.
The sixth resistor R1 is used to pull down the level of a circuit node between the sixth resistor R1, the seventh resistor R3 and the MCU control module 2.
In another embodiment of the present application, the RS485 communication module 4 includes: the system comprises a first isolation module 6, a second isolation module 7, a third isolation module 8 and an RS485 communication unit 9;
the transmitting end of the RS485 communication module 4 is connected with the input end of the first isolation module 6, and the output end of the first isolation module 6 is connected with the transmitting end of the RS485 communication unit 9;
the receiving end of the RS485 communication module 4 is connected with the input end of the second isolation module 7, and the output end of the second isolation module 7 is connected with the receiving end of the RS485 communication unit 9;
the driving end of the RS485 communication module 4 is connected with the input end of the third isolation module 8, and the output end of the third isolation module 8 is connected with the driving end of the RS485 communication unit 9.
In a further embodiment of the present application, the first isolation module 6 comprises: a seventh resistor R3, an eighth resistor R2, a third optocoupler OPT3 and a ninth resistor R4;
the input end of the first isolation module 6 is connected to the first connection end of the seventh resistor R3, and the second connection end of the seventh resistor R3 is connected to the first connection end of the eighth resistor R2 and the first connection end of the third coupling OPT3 photo-receiver, respectively; a second connecting end of a light receiver of the third optocoupler OPT3 is grounded; the positive electrode of a light emitter of the third optocoupler OPT3 is connected with the first connection end of the ninth resistor R4, and the negative electrode of the light emitter of the third optocoupler OPT3 is connected with the output end of the first isolation module 6;
the second connection end of the eighth resistor R2 is grounded, and the second connection end of the ninth resistor R4 is connected with a power supply.
In a further embodiment of the present application, the second isolation module 7 comprises: a tenth resistor R5, a fourth optocoupler OPT4, an eleventh resistor R6, and a twelfth resistor R7;
an input end of the second isolation module 7 is connected to a cathode of a light emitter of the fourth optical coupler OPT4, an anode of the light emitter of the fourth optical coupler OPT4 is connected to a first connection end of the tenth resistor R5, and a first connection end of a light receiver of the fourth optical coupler OPT4 is connected to a first connection end of the eleventh resistor R6 and an output end of the second isolation module 7;
a second connection end of a light receiver of the fourth optocoupler OPT4 is connected with a first connection end of the twelfth resistor R7, and a second connection end of the twelfth resistor R7 is grounded;
and a second connection end of the tenth resistor R5 and a second connection end of the eleventh resistor R6 are respectively connected with a power supply.
In a further embodiment of the present application, the third isolation module 8 comprises: a thirteenth resistor R8, a fifth optocoupler OPT5 and a fourteenth resistor R9;
an input end of the third isolation module 8 is connected to a first connection end of the thirteenth resistor R8, a second connection end of the thirteenth resistor R8 is connected to an anode of a light emitter of the fifth opto-coupler OPT5, a cathode of the light emitter of the fifth opto-coupler OPT5 is grounded, a first connection end of a light receiver of the fifth opto-coupler OPT5 is connected to a power supply, and a second connection end of the light receiver of the fifth opto-coupler OPT5 is connected to a first connection end of the fourteenth resistor R9 and an output end of the third isolation module 8, respectively;
a second connection terminal of the fourteenth resistor R9 is connected to ground.
The third optical coupler OPT3, the fourth optical coupler OPT4 and the fifth optical coupler OPT5 are used for isolating power supplies on the left side and the right side of the third optical coupler OPT3, the fourth optical coupler OPT4 and the fifth optical coupler OPT5, and the power supplies on the left side and the right side of the third optical coupler OPT3, the fourth optical coupler OPT4 and the fifth optical coupler OPT5 are not grounded together.
In another embodiment of the present application, the RS485 communication unit 9 includes: the device comprises an RS485 communication chip, a fifteenth resistor R10, a sixteenth resistor R11, a seventeenth resistor R12, a first magnetic bead L1, a second magnetic bead L2, a second terminal CN2, a first transient suppression diode V1, a second transient suppression diode V2 and a third transient suppression diode V3;
the transmitting end of the RS485 communication unit 9 is connected with the transmitting end of the RS485 communication chip;
the receiving end of the RS485 communication unit 9 is connected with the receiving end of the RS485 communication chip;
the driving end of the RS485 communication unit 9 is connected with the driving end of the RS485 communication chip;
the power end of the RS485 communication chip is connected with a power supply;
the first connection end of the RS485 communication chip is respectively connected with the first connection end of the fifteenth resistor R10, the first connection end of the sixteenth resistor R11 and the first connection end of the first magnetic bead L1; a second connection end of the first magnetic bead L1 is connected with a first connection end of the second terminal CN2, and a second connection end of the fifteenth resistor R10 is connected with a power supply;
a second connection end of the RS485 communication chip is respectively connected with a first connection end of the seventeenth resistor R12, a second connection end of the sixteenth resistor R11 and a first connection end of the second magnetic bead L2; a second connection end of the second magnetic bead L2 is connected to a second connection end of the second terminal CN2, and a second connection end of the seventeenth resistor R12 is grounded;
the grounding end of the RS485 communication chip is grounded;
a first connection end of the first transient suppression diode V1 is connected to the second connection end of the first magnetic bead L1, and a second connection end of the first transient suppression diode V1 is connected to the second connection end of the seventeenth resistor R12;
a first connection end of the second transient suppression diode V2 is connected to a second connection end of the second magnetic bead L2, and a second connection end of the second transient suppression diode V2 is connected to a second connection end of the seventeenth resistor R12;
a first connection terminal of the third transient suppression diode V3 is connected to the second connection terminal of the first magnetic bead L1, and a second connection terminal of the third transient suppression diode V3 is connected to the second connection terminal of the second magnetic bead L2.
Illustratively, the RS485 communication chip is a MAX13085 chip (as shown in fig. 1), and the MAX13085 chip is an RS485/422 transceiver;
illustratively, the first transient suppression diode V1, the second transient suppression diode V2, and the third transient suppression diode V3 are all transient suppression diodes P6SMB6.8CA for protecting sensitive electronic devices from lightning strikes and other transient voltage events, and for protecting I/O interfaces, VCC buses, and other vulnerable components;
the first magnetic bead L1 and the second magnetic bead L2 are used for suppressing high-frequency noise and spike interference on a signal line and a power line, and have the capacity of absorbing electrostatic pulses.
For convenience of understanding, the working principle of the outdoor unit communication circuit shown in fig. 1 will be briefly described below with reference to an actual application scenario, when the switch S1 in the selection module 1 is turned on with the first resistor R15, the selection module 1 outputs a high level, and the MCU control module 2 sends a signal to the indoor unit of the air conditioner through the first terminal CN1 of the zero-live line communication module 3.
Specifically, when a transmitting end TXD of the MCU control module 2 outputs a high level signal, a triode Q1 at a receiving end of the zero-live line communication module 3 is turned on, a first optocoupler OPT1 is turned on, a second optocoupler OPT2 is turned on, and a first terminal CN1 receives the high level signal and transmits the high level signal to the indoor unit of the air conditioner; meanwhile, as the second optocoupler OPT2 is switched on, the transmitting end of the zero-live wire communication module 3 outputs a high-level signal and transmits the high-level signal to the receiving end of the MCU control module 2;
when a transmitting end TXD of the MCU control module 2 outputs a low-level signal, a triode Q1 at a receiving end of the zero-live wire communication module 3 is disconnected, a first optical coupler OPT1 is disconnected, a second optical coupler OPT2 is disconnected, and a first terminal CN1 receives the low-level signal and transmits the low-level signal to an indoor unit of an air conditioner; meanwhile, as the second optical coupler OPT2 is disconnected, the transmitting end of the zero-live line communication module 3 outputs a low-level signal and transmits the low-level signal to the receiving end RXD of the MCU control module 2.
As shown in fig. 1, when the switch S1 in the selection module 1 is turned on with the second resistor R16, the selection module 1 outputs a low level, and the MCU control module 2 sends a signal to the indoor unit of the air conditioner through the second terminal CN2 of the RS485 communication module 4.
Specifically, when the enable end of the MCU control module 2 outputs a low level signal, the fifth optocoupler OPT5 of the RS485 communication module 4 is disconnected, the drive end of the RS485 communication module 4 receives a low level signal, and the RS485 communication module 4 is in a receiving state. At this time, a transmitting end TXD of the MCU control module 2 outputs a high level signal, a fourth opto-coupler OPT4 at a receiving end of the RS485 communication module 4 is turned off, and a receiving end of the RS485 communication unit 9 receives the high level signal, and after the high level signal is converted by the RS485 communication unit 9, the high level signal is transmitted to the indoor unit of the air conditioner through a second terminal CN 2.
When the enable end of the MCU control module 2 outputs a high level signal, the fifth optocoupler OPT5 of the RS485 communication module 4 is switched on, the drive end of the RS485 communication module 4 receives the high level signal, and the RS485 communication module 4 is in a sending state. At this time, the transmitting end of the RS485 communication unit 9 outputs a high level signal, the third optocoupler OPT3 at the transmitting end of the RS485 communication module 4 is disconnected, and the receiving end RXD of the MCU control module 2 receives the high level signal.
When the enable end of the MCU control module 2 outputs a low level signal, the fifth optocoupler OPT5 of the RS485 communication module 4 is disconnected, the drive end of the RS485 communication module 4 receives a low level signal, and the RS485 communication module 4 is in a receiving state. At this time, a transmitting end TXD of the MCU control module 2 outputs a low level signal, a fourth opto-coupler OPT4 at a receiving end of the RS485 communication module 4 is turned on, and a receiving end of the RS485 communication unit 9 receives the low level signal, converts the low level signal by the RS485 communication unit 9, and transmits the low level signal to the indoor unit of the air conditioner through a second terminal CN 2;
when the enable end of the MCU control module 2 outputs a high level signal, the fifth optocoupler OPT5 of the RS485 communication module 4 is switched on, the drive end of the RS485 communication module 4 receives the high level signal, and the RS485 communication module 4 is in a sending state. At this time, a sending end of the RS485 communication unit 9 outputs a low level signal, a third optocoupler OPT3 of a sending end of the RS485 communication module 4 is turned on, and a receiving end RXD of the MCU control module 2 receives the low level signal.
Therefore, the signal is sent to the indoor unit of the air conditioner through the zero-live line communication module or the RS485 communication module in the circuit of the outdoor unit of the air conditioner.
In order to facilitate understanding the theory of operation of air conditioning outdoor unit circuit between machine and air condensing units in the practical application scene, the embodiment of the utility model provides a circuit diagram of zero live line communication circuit loop still is provided, as shown in FIG. 2, seventh opto-coupler OPT7 and ninth opto-coupler OPT9 are located the air conditioning indoor unit in the zero live line communication circuit loop, sixth opto-coupler OPT6 and eighth opto-coupler OPT8 are located the air conditioning outdoor unit, through zero live line circuit communication between air conditioning indoor unit and the air conditioning outdoor unit.
When the circuit of the outdoor unit of the air conditioner sends a signal for controlling the indoor unit of the air conditioner to the indoor unit of the air conditioner, the indoor unit of the air conditioner responds to the signal and sends a communication signal to the outdoor unit of the air conditioner through the zero-live line circuit, and when the outdoor unit of the air conditioner receives the communication signal, the receiving end of the indoor unit of the air conditioner is kept in a conducting state, and the sending end of the outdoor unit is kept in a conducting state. At the moment, a sending end of an indoor unit of the air conditioner outputs a low-level signal, a seventh optocoupler OPT7 is disconnected, an eighth optocoupler OPT8 is disconnected, an eighteenth resistor R19 is pulled down to be grounded, and a receiving end of an outdoor unit of the air conditioner receives the low-level signal; a sending end of an indoor unit of the air conditioner outputs a high-level signal, a seventh optocoupler OPT7 is conducted, an eighth optocoupler OPT8 is conducted, a power supply VCC provides the high-level signal, and a receiving end of the outdoor unit of the air conditioner receives the high-level signal;
when the circuit of the outdoor unit of the air conditioner sends a signal for controlling the outdoor unit of the air conditioner to the outdoor unit of the air conditioner, the outdoor unit of the air conditioner responds to the signal and sends a communication signal to the indoor unit of the air conditioner through the zero-live line circuit, and when the indoor unit of the air conditioner receives the communication signal, the receiving end of the outdoor unit of the air conditioner keeps a conducting state, and the sending end of the indoor unit keeps a conducting state. At the moment, the outdoor unit of the air conditioner outputs a low level signal, the sixth optocoupler OPT6 is disconnected, the ninth optocoupler OPT9 is disconnected, the nineteenth resistor R20 is pulled down to be grounded, and the receiving end of the indoor unit of the air conditioner receives the low level signal; the outdoor machine of the air conditioner outputs high level signals, the sixth opto-coupler OPT6 is connected, the ninth opto-coupler OPT9 is connected, the nineteenth resistor R20 is pulled down and grounded, the power VCC provides high level signals, and the receiving end of the indoor machine of the air conditioner receives the high level signals.
Therefore, signals can be transmitted between the air conditioner outdoor unit and the air conditioner indoor unit.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. An air conditioner outdoor unit communication circuit, comprising: the device comprises a selection module, an MCU control module, a zero-live line communication module and an RS485 communication module;
the output end of the selection module is connected with the control end of the MCU control module, the sending end of the MCU control module is connected with the receiving end of the zero-live wire communication module, the receiving end of the MCU control module is connected with the sending end of the zero-live wire communication module, and the zero-live wire communication module is provided with a first terminal for connecting an indoor unit of an air conditioner; the sending end of the MCU control module is connected with the receiving end of the RS485 communication module, the receiving end of the MCU control module is connected with the sending end of the RS485 communication module, the enabling end of the MCU control module is connected with the driving end of the RS485 communication module, and the RS485 communication module is provided with a second terminal for connecting the indoor unit of the air conditioner;
when the selection module outputs a high level, the MCU control module sends a signal to the indoor unit of the air conditioner through a first terminal of the zero-live wire communication module;
when the selection module outputs a low level, the MCU control module sends a signal to the indoor unit of the air conditioner through the second terminal of the RS485 communication module.
2. The outdoor unit of an air conditioner of claim 1, wherein the selection module comprises: a first resistor, a second resistor and a switch;
the first connecting end of the first resistor is connected with a power supply, and the second connecting end of the first resistor is connected with the first connecting end of the switch;
the first connecting end of the second resistor is connected with the second connecting end of the switch, and the second connecting end of the second resistor is grounded;
and the control end of the switch is connected with the output end of the selection module.
3. An outdoor unit communication circuit of an air conditioner according to claim 1, wherein the zero line and fire line communication module comprises: the triode, the first optocoupler, the second optocoupler, the zero live wire unit and the first terminal;
the receiving end of the zero-live wire communication module is connected with the base electrode of the triode, the emitting electrode of the triode is grounded, the collecting electrode of the triode is connected with the negative electrode of the light emitter of the first optocoupler, the negative electrode of the light emitter of the first optocoupler is connected with the power supply, and the first connecting end of the light receiver of the first optocoupler is connected with the first terminal; the second connecting end of the light receiver of the first optical coupler is connected with the cathode of the light emitter of the second optical coupler,
and a transmitting end of the zero-fire wire communication module is connected with a first connecting end of a light receiver of the second optical coupler, a second connecting end of the light receiver of the second optical coupler is connected with a power supply, and a positive electrode of a light emitter of the second optical coupler is connected with the zero-fire wire unit.
4. An outdoor unit communication circuit of an air conditioner according to claim 3, wherein the zero line unit comprises: the circuit comprises a capacitor, a first diode, a second diode, a zero line, a third resistor and a live wire;
the anode of the capacitor is connected with the cathode of the first diode and the cathode of the second diode respectively; the negative electrode of the capacitor and the positive electrode of the second diode are respectively connected with a zero line of an alternating current power supply;
the zero line is connected with a zero line of an alternating current power supply;
the anode of the first diode is connected with the first connecting end of the third resistor, and the second connecting end of the third resistor is connected with the live wire of the alternating current power supply;
the live wire is connected with the live wire of the alternating current power supply.
5. An outdoor unit communication circuit of an air conditioner according to claim 3, wherein the zero line and fire line communication module further comprises: a fourth resistor, a fifth resistor and a sixth resistor;
the first connecting end of the fourth resistor is connected with the receiving end of the zero-live wire communication module, and the second connecting end of the fourth resistor is connected with the base electrode of the triode;
the first connecting end of the fifth resistor is connected with the first connecting end of the light receiver of the first optocoupler;
the first connecting end of the sixth resistor is connected with the first connecting end of the light receiver of the second optocoupler;
and the second connecting end of the fifth resistor and the second connecting end of the sixth resistor are grounded.
6. The outdoor unit of an air conditioner of claim 1, wherein the RS485 communication module comprises: the system comprises a first isolation module, a second isolation module, a third isolation module and an RS485 communication unit;
the transmitting end of the RS485 communication module is connected with the input end of the first isolation module, and the output end of the first isolation module is connected with the transmitting end of the RS485 communication unit;
the receiving end of the RS485 communication module is connected with the input end of the second isolation module, and the output end of the second isolation module is connected with the receiving end of the RS485 communication unit;
the driving end of the RS485 communication module is connected with the input end of the third isolation module, and the output end of the third isolation module is connected with the driving end of the RS485 communication unit.
7. The outdoor unit of claim 6, wherein the first isolation module comprises: the third resistor is connected with the fourth optical coupler;
the input end of the first isolation module is connected with the first connecting end of the seventh resistor, and the second connecting end of the seventh resistor is respectively connected with the first connecting end of the eighth resistor and the first connecting end of the third opto-coupler light receiver; a second connecting end of a light receiver of the third optical coupler is grounded; the positive electrode of a light emitter of the third optocoupler is connected with the first connecting end of the ninth resistor, and the negative electrode of the light emitter of the third optocoupler is connected with the output end of the first isolation module;
and a second connecting end of the eighth resistor is grounded, and a second connecting end of the ninth resistor is connected with a power supply.
8. The outdoor unit of claim 6, wherein the second isolating module comprises: a tenth resistor, a fourth optocoupler, an eleventh resistor and a twelfth resistor;
the input end of the second isolation module is connected with the cathode of the light emitter of the fourth optocoupler, the anode of the light emitter of the fourth optocoupler is connected with the first connection end of the tenth resistor, and the first connection end of the light receiver of the fourth optocoupler is connected with the first connection end of the eleventh resistor and the output end of the second isolation module;
a second connecting end of a light receiver of the fourth optical coupler is connected with a first connecting end of the twelfth resistor, and a second connecting end of the twelfth resistor is grounded;
and a second connecting end of the tenth resistor and a second connecting end of the eleventh resistor are respectively connected with a power supply.
9. The outdoor unit of claim 6, wherein the third isolation module comprises: a thirteenth resistor, a fifth optocoupler, and a fourteenth resistor;
the input end of the third isolation module is connected with the first connection end of the thirteenth resistor, the second connection end of the thirteenth resistor is connected with the anode of the light emitter of the fifth optocoupler, the cathode of the light emitter of the fifth optocoupler is grounded, the first connection end of the light receiver of the fifth optocoupler is connected with the power supply, and the second connection end of the light receiver of the fifth optocoupler is respectively connected with the first connection end of the fourteenth resistor and the output end of the third isolation module;
and the second connection end of the fourteenth resistor is grounded.
10. The outdoor unit of claim 6, wherein the RS485 communication unit comprises an RS485 communication chip, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, a first magnetic bead, a second terminal, a first transient suppression diode, a second transient suppression diode, and a third transient suppression diode;
the transmitting end of the RS485 communication unit is connected with the transmitting end of the RS485 communication chip;
the receiving end of the RS485 communication unit is connected with the receiving end of the RS485 communication chip;
the driving end of the RS485 communication unit is connected with the driving end of the RS485 communication chip;
the power end of the RS485 communication chip is connected with a power supply;
the first connection end of the RS485 communication chip is respectively connected with the first connection end of the fifteenth resistor, the first connection end of the sixteenth resistor and the first connection end of the first magnetic bead; the second connection end of the first magnetic bead is connected with the first connection end of the second terminal, and the second connection end of the fifteenth resistor is connected with a power supply;
the second connecting end of the RS485 communication chip is respectively connected with the first connecting end of the seventeenth resistor, the second connecting end of the sixteenth resistor and the first connecting end of the second magnetic bead; a second connection end of the second magnetic bead is connected with a second connection end of the second terminal, and a second connection end of the seventeenth resistor is grounded;
the grounding end of the RS485 communication chip is grounded;
a first connection end of the first transient suppression diode is connected with a second connection end of the first magnetic bead, and a second connection end of the first transient suppression diode is connected with a second connection end of the seventeenth resistor;
a first connection end of the second transient suppression diode is connected with a second connection end of the second magnetic bead, and a second connection end of the second transient suppression diode is connected with a second connection end of the seventeenth resistor;
the first connection end of the third transient suppression diode is connected with the second connection end of the first magnetic bead, and the second connection end of the third transient suppression diode is connected with the second connection end of the second magnetic bead.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120556050.3U CN214891748U (en) | 2021-03-17 | 2021-03-17 | Communication circuit of outdoor unit of air conditioner |
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| CN202120556050.3U CN214891748U (en) | 2021-03-17 | 2021-03-17 | Communication circuit of outdoor unit of air conditioner |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114978803A (en) * | 2022-05-20 | 2022-08-30 | 淮安威灵电机制造有限公司 | Isolated asynchronous communication circuit and method of household appliance and household appliance |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114978803A (en) * | 2022-05-20 | 2022-08-30 | 淮安威灵电机制造有限公司 | Isolated asynchronous communication circuit and method of household appliance and household appliance |
| CN114978803B (en) * | 2022-05-20 | 2023-11-21 | 淮安威灵电机制造有限公司 | Isolation asynchronous communication circuit and method of household appliance and household appliance |
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