CN212515788U - Communication circuit and air conditioner - Google Patents
Communication circuit and air conditioner Download PDFInfo
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- CN212515788U CN212515788U CN202021529304.4U CN202021529304U CN212515788U CN 212515788 U CN212515788 U CN 212515788U CN 202021529304 U CN202021529304 U CN 202021529304U CN 212515788 U CN212515788 U CN 212515788U
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Abstract
The utility model discloses a communication circuit and air conditioner, communication circuit include communication carrier conversion module and opto-coupler isolation conversion module, wherein, communication carrier conversion module, including first communication carrier end and first earthing terminal, first earthing terminal is connected with the reference ground, and communication carrier conversion module is used for converting the sending signal of control panel into carrier signal and converting the transmission signal of opto-coupler isolation conversion module into the received signal of control panel; the optical coupling isolation conversion module comprises a second communication carrier end and a second grounding end, the second grounding end is connected with a reference ground, the second communication carrier end is connected with the first communication carrier end, and the optical coupling isolation conversion module is used for converting carrier signals into receiving signals of a driving plate and transmitting the sending signals of the driving plate to the communication carrier conversion module. The communication circuit can realize the communication between boards and reduce the design cost.
Description
Technical Field
The utility model belongs to the technical field of the air conditioner technique and specifically relates to a communication circuit and air conditioner are related to.
Background
In the prior art, RS232, RS485 or current loop communication is adopted between the frequency conversion air conditioner board and the board, wherein RS232 and RS485 communication is adopted, the number of communication wire cores is large, three communication signals including receiving, sending and reference ground are included, a special chip is needed for part of long-distance application, and the cost is high. The current loop communication needs to convert carrier frequency to an alternating current N line, which relates to strong and weak current signal conversion and isolation, and the design is more complex, so that the current loop communication is only suitable for split air conditioners with indoor units and outdoor units.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, an object of the present invention is to provide a communication circuit, which can realize communication between boards and reduce design cost.
The second objective of the present invention is to provide an air conditioner.
In order to solve the above problem, an embodiment of the first aspect of the present invention provides a communication circuit, where the communication circuit includes a communication carrier conversion module and an optical coupler isolation conversion module, where the communication carrier conversion module includes a first communication carrier terminal and a first ground terminal, the first ground terminal is connected to a reference ground, and the communication carrier conversion module is configured to convert a transmission signal of a control board into a carrier signal and convert a transmission signal of the optical coupler isolation conversion module into a reception signal of the control board; the optical coupling isolation conversion module comprises a second communication carrier terminal and a second grounding terminal, the second grounding terminal is connected with a reference ground, the second communication carrier terminal is connected with the first communication carrier terminal, and the optical coupling isolation conversion module is used for converting the carrier signal into a receiving signal of the drive plate and transmitting the transmitting signal of the drive plate to the communication carrier conversion module.
According to the communication circuit of the embodiment of the present invention, the first communication carrier terminal based on the communication carrier conversion module is connected to the second communication carrier terminal of the optocoupler isolation conversion module, so that the transmission signal of the control board can be transmitted to the drive board after being converted and transmitted by the communication carrier conversion module and the optocoupler isolation conversion module, and the transmission signal of the drive board can also be transmitted to the control board after being converted and transmitted by the optocoupler isolation conversion module and the communication carrier conversion module, thereby realizing the carrier communication between the boards, and compared with the communication method using RS232 and RS485 in the prior art, the embodiment of the present invention realizes the communication between the communication carrier conversion module and the optocoupler isolation conversion module by connecting the first communication carrier terminal to the second communication carrier terminal, namely converting the two transmission and reception paths of communication signals into one path of carrier signals, therefore, the number of the transmission wire cores is changed from three to two, the number of the transmission wire cores is saved, and the design cost is reduced.
In some embodiments, the communication carrier switching module comprises: a first end of the first triode unit is suitable for being connected with a signal sending end of the control board, and a second end of the first triode unit is connected with the reference ground; a second end of the second triode unit is suitable for being connected with a signal receiving end of the control board, and a third end of the second triode unit is connected with the reference ground; and the first end of the third triode unit is connected with the third end of the first triode unit, the second end of the third triode unit is the first communication carrier end, the second end of the third triode unit is connected with the second communication carrier end, and the third end of the third triode unit is connected with the first end of the second triode unit.
In some embodiments, the first triode unit includes: a base electrode of the first triode is a first end of the first triode unit, the base electrode of the first triode is suitable for being connected with a signal sending end of the control board, and an emitting electrode of the first triode is connected with the reference ground; and a first end of the first resistor is connected with the collector of the first triode, and a second end of the first resistor is connected with a first end of the third triode unit.
In some embodiments, the second triode unit includes: the emitter of the second triode is the second end of the second triode unit, the emitter of the second triode is suitable for being connected with the signal receiving end of the control board, the collector of the second triode is connected with the reference ground, and the base of the second triode is connected with the third end of the third triode unit; a first end of the second resistor is connected with an emitting electrode of the second triode, and a second end of the second resistor is connected with a first preset power supply; and the first end of the third resistor is connected with the base electrode of the second triode, and the second end of the third resistor is connected with the collector electrode of the second triode.
In some embodiments, the third triode unit includes: a base of the third triode is connected with the second end of the first resistor, a collector of the third triode is connected with a base of the second triode, an emitter of the third triode is the first communication carrier end, and an emitter of the third triode is connected with the second communication carrier end; and a first end of the fourth resistor is connected with the base electrode of the third triode, and a second end of the fourth resistor is connected with the emitting electrode of the third triode.
In some embodiments, the optical coupling isolation conversion module comprises: a first input end of the first optical coupler unit is connected with the first communication carrier end, a first output end of the first optical coupler unit is connected with a second preset power supply, and a second output end of the first optical coupler unit is suitable for being connected with a signal receiving end of the driving board; the first input end of the second optical coupling unit is suitable for being connected with the signal sending end of the driving plate, the second input end of the second optical coupling unit is connected with the reference ground, the first output end of the second optical coupling unit is connected with the second input end of the first optical coupling unit, and the second output end of the second optical coupling unit is connected with a third preset power supply.
In some embodiments, the first light coupling unit includes: a first input end of the first optical coupler is connected with the first communication carrier end, a second input end of the first optical coupler is connected with a first output end of the second optical coupler unit, a first output end of the first optical coupler is connected with the second preset power supply, a second output end of the first optical coupler is a second output end of the first optical coupler unit, and a second output end of the first optical coupler is suitable for being connected with a signal receiving end of the driving plate; and a first end of the fifth resistor is connected with the second output end of the first optocoupler, and a second end of the fifth resistor is connected with the reference ground.
In some embodiments, the second light coupling unit includes: a first input end of the second optical coupler is a first input end of the second optical coupler unit, the first input end of the second optical coupler is suitable for being connected with a signal sending end of the driving plate, and a first output end of the second optical coupler is connected with a second input end of the first optical coupler; a first end of the sixth resistor is connected with a second output end of the second optocoupler, and a second end of the sixth resistor is connected with the third preset power supply; and a first end of the seventh resistor is connected with a second input end of the second optocoupler, and a second end of the seventh resistor is connected with the reference ground.
An embodiment of the second aspect of the present invention provides an air conditioner, including: the communication circuit according to the above embodiment includes a first input terminal, a first output terminal, a second input terminal, a second output terminal, a third ground terminal, and a fourth ground terminal; the control panel comprises a first signal sending end, a first signal receiving end and a control grounding end, wherein the first signal sending end is connected with the first input end, the first signal receiving end is connected with the first output end, and the control grounding end is connected with a third grounding end; the driving board comprises a second signal sending end, a second signal receiving end and a driving grounding end, the second signal sending end is connected with the second input end, the second signal receiving end is connected with the second output end, and the driving grounding end is connected with the fourth grounding end.
According to the utility model discloses the air conditioner, through adopting the communication circuit that above-mentioned embodiment provided, be connected with control panel, drive plate respectively based on communication circuit, can send the sending signal of control panel for the drive plate after communication circuit conversion and transmission to and, also can feed back the sending signal of drive plate to the control panel after communication circuit's conversion and transmission to realize the communication between board and the board, and reduce design cost.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural view of an air conditioner according to an embodiment of the present invention;
fig. 2 is a circuit schematic of a communication circuit according to an embodiment of the present invention;
fig. 3 is a schematic diagram of signal line transmission of an air conditioner according to an embodiment of the present invention.
Reference numerals:
an air conditioner 100;
a communication circuit 10; a control board 20; a drive plate 30;
a communication carrier conversion module 11; an optical coupling isolation conversion module 12;
a first triode unit 1; a second triode unit 2; a third triode unit 3; a first optical coupling unit 4; and a second light coupling unit 5.
Detailed Description
Embodiments of the present invention are described in detail below, and the embodiments described with reference to the drawings are exemplary.
In order to solve the above problem, an embodiment of the first aspect of the present invention provides a communication circuit, which can implement communication between boards and reduce design cost.
In an embodiment, the embodiment of the present invention provides a communication circuit can be applied to an air conditioner, and therefore, an embodiment of the present invention provides an air conditioner, as shown in fig. 1, an air conditioner 100 of an embodiment of the present invention includes a communication circuit 10, a control board 20 and a drive board 30.
Wherein, the communication circuit 10 includes a first input terminal, a first output terminal, a second input terminal, a second output terminal, a third ground terminal and a fourth ground terminal, and, the control board 20 includes a first signal transmitting terminal, a first signal receiving terminal and a control ground terminal, the first signal transmitting terminal is connected with the first input terminal, the first signal receiving terminal is connected with the first output terminal, the control ground terminal is connected with the third ground terminal, and the driving board 30 includes a second signal transmitting terminal, a second signal receiving terminal and a driving ground terminal, the second signal transmitting terminal is connected with the second input terminal, the second signal receiving terminal is connected with the second output terminal, the driving ground terminal is connected with the fourth ground terminal.
In the embodiment, the communication circuit 10 is configured to convert the control communication signal sent by the control board 20 into a communication command that can be received by the drive board 30 to send to the drive board 30, and the communication circuit 10 is further configured to receive the communication signal of the drive board 30 and feed back the communication signal to the control board 20.
And the control board 20 is configured to convert the user instruction into a control communication signal, send the control communication signal to the communication circuit 10 through the first signal sending end and the first input end, and receive a communication signal fed back by the communication circuit 10 based on the first signal receiving end and the first output end.
And the driving board 30 is used for receiving the communication command sent by the communication circuit 10 and driving the operation state of the load such as a fan or a compressor according to the communication command, and the driving board 30 is also used for converting the operation state of the load into a communication signal and sending the communication signal to the communication circuit 10.
Therefore, based on the connection of the communication circuit 10 with the control board 20 and the drive board 30, the transmission signal of the control board 20 can be converted and transmitted by the communication circuit 10 and then transmitted to the drive board 30, and the transmission signal of the drive board 30 can also be converted and transmitted by the communication circuit 10 and then fed back to the control board 20, thereby realizing the board-to-board communication inside the air conditioner 100.
The communication circuit provided by the embodiment of the present invention is described below with reference to the drawings.
As shown in fig. 1, a communication circuit 10 provided by the embodiment of the present invention includes a communication carrier conversion module 11 and an optical coupling isolation conversion module 12.
As shown in fig. 1, the communication carrier conversion module 11 includes a first communication carrier terminal and a first ground terminal, the first ground terminal is connected to a reference ground, the communication carrier conversion module 11 is configured to convert a transmission signal of the control board 20 into a carrier signal, and the communication carrier conversion module 11 is further configured to convert a transmission signal of the optical coupling isolation conversion module 12 into a reception signal of the control board 20. The optical coupling isolation conversion module 12 comprises a second communication carrier terminal and a second grounding terminal, the second grounding terminal is connected with a reference ground, the second communication carrier terminal is connected with the first communication carrier terminal, the optical coupling isolation conversion module 12 is used for converting a carrier signal into a receiving signal of the drive plate 30, and the optical coupling isolation conversion module 12 is further used for transmitting a sending signal of the drive plate 30 to the communication carrier conversion module 11.
In the embodiment, based on that the first communication carrier terminal of the communication carrier conversion module 11 is connected to the second communication carrier terminal of the optical coupling isolation conversion module 12, when signal transmission is performed, a transmission signal of the control board 20 is converted into a carrier signal through circuit signal conversion in the communication carrier conversion module 11, and the carrier signal is transmitted to the optical coupling isolation conversion module 12 through the first communication carrier terminal and the second communication carrier terminal, and then the communication instruction transmitted by the control board 20 in the carrier signal is converted into a communication instruction receivable by the drive board 30 through optical coupling signal conversion in the optical coupling isolation conversion module 12, that is, the communication instruction is converted into a receiving signal of the drive board 30 and transmitted to the drive board 30, and after the drive board 30 receives the communication instruction transmitted by the control board 20, the load is driven according to the instruction, and the operating state of the load is converted into a communication signal and fed back to the optical coupling isolation conversion module 12, the optical coupling isolation conversion module 12 converts the transmission signal of the driving board 30 into a carrier signal, and transmits the carrier signal to the communication carrier conversion module 11 through a connection line between the first communication carrier end and the second communication carrier end, so that the communication carrier conversion module 11 converts the transmission signal of the optical coupling isolation conversion module 12 into a receiving signal of the control board 20, and transmits the receiving signal to the control board 20. Therefore, the communication circuit 10 according to the embodiment of the present invention can realize carrier communication between boards.
And, the embodiment of the utility model provides an in through being connected first communication carrier wave end and second communication carrier wave end, realize communication between communication carrier wave conversion module 11 and the opto-coupler isolation conversion module 12, be exactly with be used for sending between two modules and receive two way communication signal conversion be carrier wave signal all the way, make the transmission core number between two modules by sending, receive, three communication sinle silks become two communication sinle silks with reference to, thereby save the sinle silk number of transmission, it is many with RS485 communication sinle silks to have solved RS232, the problem that the wire rod is with high costs, design cost is reduced.
According to the communication circuit 10 of the embodiment of the present invention, the first communication carrier terminal based on the communication carrier conversion module 11 is connected to the second communication carrier terminal of the optocoupler isolation conversion module 12, so that the transmission signal of the control board 20 can be transmitted to the driving board 30 after being converted and transmitted by the communication carrier conversion module 11 and the optocoupler isolation conversion module 12, and the transmission signal of the driving board 30 can also be transmitted to the control board 20 after being converted and transmitted by the optocoupler isolation conversion module 12 and the communication carrier conversion module 11, i.e. the carrier communication between the boards is realized, and compared with the communication mode of RS232 and RS485 adopted in the prior art, the embodiment of the present invention realizes the communication between the communication carrier conversion module 11 and the optocoupler isolation conversion module 12 by connecting the first communication carrier terminal and the second communication carrier terminal, i.e. the transmission and the reception of two paths of communication signals are converted into one path of carrier signals, therefore, the number of the transmission wire cores is changed from three to two, the number of the transmission wire cores is saved, and the design cost is reduced.
In some embodiments, as shown in fig. 2, the communication carrier conversion module 11 of the present invention includes a first triode unit 1, a second triode unit 2, and a third triode unit 3.
Specifically, a first end of the first triode unit 1 is suitable for being connected with a signal transmitting end of the control board 20, and a second end of the first triode unit 1 is connected with a reference ground; a second end of the second triode unit 2 is suitable for being connected with a signal receiving end of the control board 20, and a third end of the second triode unit 2 is connected with a reference ground; the first end of the third triode unit 3 is connected with the third end of the first triode unit 1, the second end of the third triode unit 3 is a first communication carrier end, the second end of the third triode unit 3 is connected with the second communication carrier end, and the third end of the third triode unit 3 is connected with the first end of the second triode unit 2.
In some embodiments, as shown in fig. 2, the first transistor unit 1 of the present invention includes a first transistor V1 and a first resistor R1.
Specifically, the base of the first transistor V1 is the first end of the first transistor unit 1, the base of the first transistor V1 is suitable for being connected with the signal sending end of the control board 20, and the emitter of the first transistor V1 is connected with the reference ground; a first terminal of the first resistor R1 is connected to the collector of the first transistor V1, and a second terminal of the first resistor R1 is connected to a first terminal of the third transistor unit 3. Wherein, the collector of the first transistor V1 is connected to the third transistor unit 3 through a first resistor R1 to control the on and off of the third transistor unit 3.
In some embodiments, as shown in fig. 2, the second transistor unit 2 of the present invention includes a second transistor V2, a second resistor R2, and a third resistor R3.
Specifically, the emitter of the second transistor V2 is the second terminal of the second transistor unit 2, the emitter of the second transistor V2 is adapted to be connected to the signal receiving terminal of the control board 20, the collector of the second transistor V2 is connected to the reference ground, and the base of the second transistor V2 is connected to the third terminal of the third transistor unit 3; a first end of the second resistor R2 is connected with an emitter of the second triode V2, and a second end of the second resistor R2 is connected with the first preset power supply U1; a first end of the third resistor R3 is connected to the base of the second transistor V2, and a second end of the third resistor R3 is connected to the collector of the second transistor V2. The base of the second triode V2 is connected to the third triode unit 3 for receiving the signal sent by the third triode unit 3 to determine its on and off states, the third resistor R3 is a bias resistor of the base of the second triode V2 for ensuring that the second triode V2 is in an off state when the third triode unit 3 is not turned on, and the resistance of the third resistor R3 is selected to ensure that the base voltage of the second triode V2 is consistent with the working voltage of the control board 20 when the third triode unit 3 is turned on, and the third resistor R3 is grounded together with the collector of the second triode V2. And the resistance of the second resistor R2 is selected to ensure that the signal receiving terminal of the control board 20 is at a low level when the second transistor V2 is turned on, and the signal receiving terminal of the control board 20 is at a high level when the second transistor V2 is turned off.
In some embodiments, as shown in fig. 2, the third transistor unit 3 of the present invention includes a third transistor V3 and a fourth resistor R4.
Specifically, the base of the third triode V3 is connected to the second end of the first resistor R1, the collector of the third triode V3 is connected to the base of the second triode V2, the emitter of the third triode V3 is the first communication carrier terminal, and the emitter of the third triode V3 is connected to the second communication carrier terminal; a first end of the fourth resistor R4 is connected to the base of the third transistor V3, and a second end of the fourth resistor R4 is connected to the emitter of the third transistor V3. The fourth resistor R4 is a bias resistor of the emitter and the base of the third transistor V3, and is used to ensure that the third transistor V3 is in an off state when the first transistor V1 is not turned on.
In some embodiments, as shown in fig. 2, the optical coupler isolation conversion module 12 of the present invention includes a first optical coupler unit 4 and a second optical coupler unit 5.
Specifically, a first input end of the first optical coupler unit 4 is connected to the first communication carrier terminal, a first output end of the first optical coupler unit 4 is connected to the second preset power source U2, and a second output end of the first optical coupler unit 4 is adapted to be connected to a signal receiving terminal of the driving board 30. A first input end of the second optical coupling unit 5 is suitable for being connected with a signal transmitting end of the driving board 30, a second input end of the second optical coupling unit 5 is connected with a reference ground, a first output end of the second optical coupling unit 5 is connected with a second input end of the first optical coupling unit 4, and a second output end of the second optical coupling unit 5 is connected with a third preset power supply U3.
In some embodiments, as shown in fig. 2, the first optical coupler unit 4 of the present invention includes a first optical coupler B1 and a fifth resistor R5.
Specifically, a first input end of a first optical coupler B1 is connected with a first communication carrier end, a second input end of the first optical coupler B1 is connected with a first output end of a second optical coupler unit 5, a first output end of the first optical coupler B1 is connected with a second preset power supply U2, a second output end of the first optical coupler B1 is a second output end of the first optical coupler unit 4, and a second output end of the first optical coupler B1 is suitable for being connected with a signal receiving end of the driving board 30; a first end of the fifth resistor R5 is connected with a second output end of the first optocoupler B1, and a second end of the fifth resistor R5 is connected with the reference ground. The fifth resistor R5 is a bias resistor, and is configured to ensure that the signal receiving end of the driving board 30 is at a low level when no signal is present at the transmitting end of the first optocoupler B1.
In some embodiments, as shown in fig. 2, the second optical coupler unit 5 of the present invention includes a second optical coupler B2, a sixth resistor R6, and a seventh resistor R7.
Specifically, a first input end of the second optical coupler B2 is a first input end of the second optical coupler unit 5, a first input end of the second optical coupler B2 is suitable for being connected with a signal sending end of the driving board 30, and a first output end of the second optical coupler B2 is connected with a second input end of the first optical coupler B1; a first end of a sixth resistor R6 is connected with a second output end of the second optocoupler B2, and a second end of the sixth resistor R6 is connected with a third preset power supply U3; a first end of the seventh resistor R7 is connected with a second input end of the second optocoupler B2, and a second end of the seventh resistor R7 is connected with the reference ground. The sixth resistor R6 is a current limiting resistor, and is connected to a third predetermined power source U3, such as a 12V power source, for limiting the current flowing through the optocoupler and the triode. And the seventh resistor R7 is a current-limiting resistor and is used for limiting the current of the emitting terminal diode of the second optocoupler B2.
The communication circuit according to the embodiment of the present invention is illustrated with reference to fig. 2 and 3.
As shown in fig. 2, the signal transmitting terminal of the control board 20 is connected to the base of the first transistor V1 of the communication carrier conversion module 11, and the signal receiving terminal of the control board 20 is connected to the emitter of the second transistor V2 of the communication carrier conversion module 11.
In the communication carrier conversion module 11, the collector of the first transistor V1 is connected to the base of the third transistor V3 through a first resistor R1 for controlling the turning on and off of the third transistor VV3, and the emitter of the first transistor V1 is grounded; the base electrode of the second triode V2 is connected with the collector electrode of the third triode V3 and is used for receiving a signal sent by the third triode V3 and determining the on and off of the third triode V3; the emitter of the third resistor R3 and the emitter of the second triode V2 are grounded together, two ends of the second resistor R2 are connected to the +5V power supply U1 and the emitter of the second triode V2 respectively, the emitter of the third triode V3 is connected to the diode cathode of the first optocoupler B1 in the optocoupler-isolation conversion module 12, and the reference ground of the communication carrier conversion module 11 is the control ground of the control board 20.
In the optical coupler isolation conversion module 12, a sixth resistor R6 is connected with a 12V power supply U3, a diode anode at a transmitting side of a second optical coupler B2 is connected with a signal transmitting end of the driving board 30, and an emitter at a receiving side of a first optical coupler B1 is connected with a signal receiving end of the driving board 30; the reference ground of the side where the optical coupling isolation conversion module 12 is connected with the driving plate 30 is driving ground.
The embodiment of the utility model provides a communication circuit 10's theory of operation, as shown in fig. 3, when not having communication signal, control panel 20 signal transmission end and drive plate 30 signal transmission end all send high level signal, first triode V1 this moment, third triode V3, first opto-coupler B1, second opto-coupler B2 all switches on, second triode V2 ends, high level signal is all received to control panel 20 signal receiving terminal and drive plate 30 signal receiving terminal, communication circuit 10's carrier signal voltage value is sixth resistance R6 and third resistance R3's partial pressure value.
When the control board 20 starts to send out a communication signal, the signal sending end of the drive board 30 still keeps sending a high level at this time, when the sending level of the signal sending end of the control board 20 is a low level, the first triode V1 and the third triode V3 are cut off, no current flows through a diode at the emitting side of the first optocoupler B1, so that the receiving side of the first optocoupler B1 is cut off, the signal receiving end of the drive board 30 is a low level, and because the third triode V3 is cut off, the base of the second triode V2 is a low level, the second triode V2 is switched on, and the signal receiving end of the control board 20 is also a low level; when the signal transmitting end of the control panel 20 is at a high level, the first triode V1, the third triode V3, the first optocoupler B1 and the second optocoupler B2 are all turned on, the second triode V2 is turned off, and the signal receiving end of the control panel 20 and the signal receiving end of the drive board 30 both receive high level signals. Therefore, the control board 20 sends a signal, and after the signal is converted by the communication carrier conversion module 11 and the optical coupling isolation conversion module 12, the driving board 30 can receive the signal so as to drive the relevant load.
After the control board 20 finishes sending the signal, the signal sending end of the control board 20 is recovered to continuously send the high level signal. At this time, the driving board 30 starts to send a signal, when the signal sending end of the driving board 30 is at a low level, the second optocoupler B2 is cut off, and since no current flows, the first optocoupler B1 is also cut off, so that the signal receiving end of the driving board 30, the communication carrier end and the collector of the third triode V3 are all at a low level, the base of the second triode V2 is at a low level, so that the second triode V2 is turned on, and the signal receiving end of the control board 20 is at a low level; when the signal transmitting end of the driving board 30 is at a high level, the first triode V1, the third triode V3, the first optocoupler B1 and the second optocoupler B2 are all turned on, the second triode V2 is turned off, and the signal receiving end of the control board 20 and the signal receiving end of the driving board 30 both receive high level signals. Therefore, square wave communication signals are generated by switching between high and low levels, so that the driving board 30 sends signals, and after the signals are converted by the optical coupling isolation conversion module 12 and the communication carrier conversion module 11, the load operation state is fed back to the control board 20 for receiving.
Therefore, the utility model discloses communication circuit 10 is through adopting 3 triodes and 2 opto-couplers, can be with the transmission between communication carrier conversion module 11 and the opto-coupler isolation conversion module 12, receive two way communication signal and convert carrier signal all the way into for transmission line core number becomes 2 by 3, thereby has saved the line core number of transmission, reduces design cost, and the circuit is simple reliable, and the output is stable, can realize the carrier communication between board and the board.
According to the utility model discloses air conditioner 100, through adopting the communication circuit 10 that above-mentioned embodiment provided, be connected with control panel 20, drive plate 30 respectively based on communication circuit 10, can send control panel 20's transmission signal for drive plate 30 after communication circuit 10 conversion and transmission to and, also can feed back control panel 20 with drive plate 30's transmission signal after communication circuit 10's conversion and transmission, thereby realize the communication between board and the board, and reduce design cost.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (9)
1. A communication circuit, characterized in that the communication circuit comprises a communication carrier conversion module and an optical coupling isolation conversion module,
the communication carrier conversion module comprises a first communication carrier end and a first grounding end, the first grounding end is connected with a reference ground, and the communication carrier conversion module is used for converting a sending signal of a control panel into a carrier signal and converting a transmission signal of the optical coupling isolation conversion module into a receiving signal of the control panel;
the optical coupling isolation conversion module comprises a second communication carrier terminal and a second grounding terminal, the second grounding terminal is connected with a reference ground, the second communication carrier terminal is connected with the first communication carrier terminal, and the optical coupling isolation conversion module is used for converting the carrier signal into a receiving signal of the drive plate and transmitting the transmitting signal of the drive plate to the communication carrier conversion module.
2. The communication circuit of claim 1, wherein the communication carrier switching module comprises:
a first end of the first triode unit is suitable for being connected with a signal sending end of the control board, and a second end of the first triode unit is connected with the reference ground;
a second end of the second triode unit is suitable for being connected with a signal receiving end of the control board, and a third end of the second triode unit is connected with the reference ground;
and the first end of the third triode unit is connected with the third end of the first triode unit, the second end of the third triode unit is the first communication carrier end, the second end of the third triode unit is connected with the second communication carrier end, and the third end of the third triode unit is connected with the first end of the second triode unit.
3. The communication circuit of claim 2, wherein the first triode unit comprises:
a base electrode of the first triode is a first end of the first triode unit, the base electrode of the first triode is suitable for being connected with a signal sending end of the control board, and an emitting electrode of the first triode is connected with the reference ground;
and a first end of the first resistor is connected with the collector of the first triode, and a second end of the first resistor is connected with a first end of the third triode unit.
4. The communication circuit of claim 3, wherein the second triode unit comprises:
the emitter of the second triode is the second end of the second triode unit, the emitter of the second triode is suitable for being connected with the signal receiving end of the control board, the collector of the second triode is connected with the reference ground, and the base of the second triode is connected with the third end of the third triode unit;
a first end of the second resistor is connected with an emitting electrode of the second triode, and a second end of the second resistor is connected with a first preset power supply;
and the first end of the third resistor is connected with the base electrode of the second triode, and the second end of the third resistor is connected with the collector electrode of the second triode.
5. The communication circuit of claim 4, wherein the third triode unit comprises:
a base of the third triode is connected with the second end of the first resistor, a collector of the third triode is connected with a base of the second triode, an emitter of the third triode is the first communication carrier end, and an emitter of the third triode is connected with the second communication carrier end;
and a first end of the fourth resistor is connected with the base electrode of the third triode, and a second end of the fourth resistor is connected with the emitting electrode of the third triode.
6. The communication circuit of claim 1, wherein the optical coupling isolation conversion module comprises:
a first input end of the first optical coupler unit is connected with the first communication carrier end, a first output end of the first optical coupler unit is connected with a second preset power supply, and a second output end of the first optical coupler unit is suitable for being connected with a signal receiving end of the driving board;
the first input end of the second optical coupling unit is suitable for being connected with the signal sending end of the driving plate, the second input end of the second optical coupling unit is connected with the reference ground, the first output end of the second optical coupling unit is connected with the second input end of the first optical coupling unit, and the second output end of the second optical coupling unit is connected with a third preset power supply.
7. The communication circuit according to claim 6, wherein the first light coupling unit comprises:
a first input end of the first optical coupler is connected with the first communication carrier end, a second input end of the first optical coupler is connected with a first output end of the second optical coupler unit, a first output end of the first optical coupler is connected with the second preset power supply, a second output end of the first optical coupler is a second output end of the first optical coupler unit, and a second output end of the first optical coupler is suitable for being connected with a signal receiving end of the driving plate;
and a first end of the fifth resistor is connected with the second output end of the first optocoupler, and a second end of the fifth resistor is connected with the reference ground.
8. The communication circuit according to claim 7, wherein the second light coupling unit comprises:
a first input end of the second optical coupler is a first input end of the second optical coupler unit, the first input end of the second optical coupler is suitable for being connected with a signal sending end of the driving plate, and a first output end of the second optical coupler is connected with a second input end of the first optical coupler;
a first end of the sixth resistor is connected with a second output end of the second optocoupler, and a second end of the sixth resistor is connected with the third preset power supply;
and a first end of the seventh resistor is connected with a second input end of the second optocoupler, and a second end of the seventh resistor is connected with the reference ground.
9. An air conditioner, comprising:
the communication circuit of any of claims 1-8, comprising a first input, a first output, a second input, a second output, a third ground, and a fourth ground;
the control panel comprises a first signal sending end, a first signal receiving end and a control grounding end, wherein the first signal sending end is connected with the first input end, the first signal receiving end is connected with the first output end, and the control grounding end is connected with a third grounding end;
the driving board comprises a second signal sending end, a second signal receiving end and a driving grounding end, the second signal sending end is connected with the second input end, the second signal receiving end is connected with the second output end, and the driving grounding end is connected with the fourth grounding end.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021529304.4U CN212515788U (en) | 2020-07-28 | 2020-07-28 | Communication circuit and air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021529304.4U CN212515788U (en) | 2020-07-28 | 2020-07-28 | Communication circuit and air conditioner |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114745224A (en) * | 2022-05-20 | 2022-07-12 | 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 |
|---|---|---|---|---|
| CN114745224A (en) * | 2022-05-20 | 2022-07-12 | 淮安威灵电机制造有限公司 | Isolated asynchronous communication circuit and method of household appliance and household appliance |
| CN114745224B (en) * | 2022-05-20 | 2023-11-21 | 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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Address after: No.1 Haixin Road, Nancun Town, Pingdu City, Qingdao City, Shandong Province Patentee after: Hisense Air Conditioning Co.,Ltd. Country or region after: China Address before: No. 151, Zhuzhou Road, Laoshan District, Qingdao, Shandong Patentee before: HISENSE (SHANDONG) AIR-CONDITIONING Co.,Ltd. Country or region before: China |