Air conditioner communication device and communication system

Abstract

The present invention relates to an air conditioner communication device and a communication system, the air conditioner communication device comprises: a logic conversion module, which receives a communication signal from a signal input terminal and converts the communication signal into an AMI signal; a communication rate control module, which is used to control and adjust the rate of the AMI signal received and output by the logic conversion module, and output the adjusted AMI signal to the signal transceiver terminal; a filtering module, which is used to receive and filter the AMI signal from the signal transceiver terminal; a comparison module, which performs threshold comparison on the filtered AMI signal and outputs it to the signal output terminal; an active inductor module; an inductor adjustment circuit, which cooperates with the active inductor module; and a signal coupling circuit, which is arranged at the signal transceiver terminal and is used to receive and transmit the adjusted AMI signal. The present invention is used to improve the communication stability of the communication device in the air conditioner and ensure the stability of the air conditioner communication system.

Description

Technical Field

[0001] The present invention relates to the field of air conditioner control, and in particular to an air conditioner communication device and a communication system. Background Art

[0002] A multi-split air conditioning system consists of a large number of indoor units, outdoor units and wire controllers. The communication between the indoor unit and the outdoor unit, and between the indoor unit and the wire controller usually adopts the HomeBus (i.e., home bus system) communication protocol. Currently, most of the multi-split air conditioning systems use the Mitsumei Electric MM1192 communication chip as the core, and the periphery is integrated with various communication circuits, drive circuits and protection circuits to form a HomeBus communication system.

[0003] In addition, the MM1192 communication chip receives the signal that has been alternately inverted (Alternate Mark Inversion, AMI) (referred to as AMI signal). The AMI signal is a digital transmission signal, and when it is used and output in the home bus system, it is composed of three values ​​of high level, middle level and low level, and passes through the bipolar signal line. In the communication method using this signal, the logic "1" is assigned to the middle level, and the logic "0" is alternately assigned to the high level and the low level.

[0004] The signals sent and received by the indoor unit, wire controller or outdoor unit's main controller are not AMI signals. Therefore, when using the MM1192 communication chip to form an air conditioner's communication system, a peripheral circuit is also required to perform signal conversion so that the MM1192 communication chip can accurately receive or send information.

[0005] In this way, the HomeBus communication system with the MM1192 communication chip as the core has more peripheral circuits, making the communication system susceptible to interference, resulting in low signal transmission quality and increased failure rate, making it difficult to ensure the normal and stable communication function of the air conditioner for a long time. Summary of the invention

[0006] The object of the present invention is to provide a communication device and a communication system for an air conditioner, so as to improve the communication stability of the communication device in the air conditioner and ensure the stability of the communication system of the air conditioner.

[0007] In order to solve the above technical problems, the present invention proposes the following technical solutions:

[0008] The present application relates to an air conditioner communication device, comprising:

[0009] The communication processing module comprises:

[0010] A logic conversion module, which receives a communication signal from a signal input terminal and converts the communication signal into an AMI signal;

[0011] A communication rate control module, which is used to control and adjust the rate of the AMI signal received and output by the logic conversion module, and output the adjusted AMI signal to the signal transceiver;

[0012] A filtering module, which is used to receive and filter the AMI signal from the signal transceiver;

[0013] A comparison module performs threshold comparison on the filtered AMI signal and outputs it to a signal output terminal;

[0014] Active inductor module;

[0015] an inductance adjustment circuit, which cooperates with the active inductor module to adjust the inductance of the active inductor in the active inductor module according to the communication rate of the AMI signal;

[0016] The signal coupling circuit is arranged at the signal transceiver end and is used for transmitting and receiving the adjusted AMI signal.

[0017] In some embodiments of the present application, the communication processing module further includes: a first protection circuit, which is arranged at the signal transceiver end and is used to protect the signal output by the communication rate control module and the signal input to the filtering module.

[0018] In some embodiments of the present application, the air conditioner communication device also includes: a terminal adjustment circuit, which includes a first I / O side and a second I / O side, the first I / O side is connected to the signal transceiver end; a second protection circuit, which includes a third I / O side and a fourth I / O side, the third I / O side is connected to the second I / O side, and the fourth I / O side is connected to the signal coupling circuit.

[0019] In some embodiments of the present application, the air conditioner communication device also includes: a terminal adjustment circuit, including a first I / O side and a second I / O side, the first I / O side is connected to the signal transceiver end, and the second I / O side is connected to the signal coupling circuit.

[0020] In some embodiments of the present application, the air conditioner communication device also includes: a second protection circuit, which includes a third I / O side and a fourth I / O side, the third I / O side is connected to the signal transceiver end, and the fourth I / O side is connected to the signal coupling circuit.

[0021] In some embodiments of the present application, the communication processing module further includes: a reset module, which receives an external reset signal and is used to reset the air conditioner communication device.

[0022] In some embodiments of the present application, the communication processing module further includes: a load power supply circuit, which outputs a power supply voltage for an external load.

[0023] In some embodiments of the present application, the air conditioner communication device further includes: a signal threshold adjustment circuit, which is connected to the comparison module and is used to adjust the threshold.

[0024] The present application also relates to an air conditioner communication system, characterized in that it comprises:

[0025] a first air conditioner communication device, which is the air conditioner communication device as described above;

[0026] The first master controller has:

[0027] a first input terminal connected to a signal output terminal of the first air conditioner communication device;

[0028] a first output terminal connected to a signal input terminal of the first air conditioner communication device;

[0029] a second air conditioner communication device, which is the air conditioner communication device as described above;

[0030] The second master controller has:

[0031] a second input terminal connected to a signal output terminal of the second air conditioner communication device;

[0032] The second output terminal is connected to the signal input terminal of the second air conditioner communication device.

[0033] The signal coupling circuit of the first air conditioner communication device is communicatively connected to the signal coupling circuit of the second air conditioner communication device.

[0034] In some embodiments of the present application, the air conditioner includes an indoor unit, a wire controller and an outdoor unit respectively communicating with the indoor unit; the main controller of the wire controller is a first main controller, and the main controller of the indoor unit is the second main controller.

[0035] In some embodiments of the present application, the air conditioner includes an indoor unit, a wire controller communicating with the indoor unit respectively, and an outdoor unit; the main controller of the indoor unit is a first main controller, and the main controller of the outdoor unit is the second main controller.

[0036] In some embodiments of the present application, when the main controller of the wire controller is the first main controller and the main controller of the indoor unit is the second main controller, the air conditioner communication system also includes: a power supply circuit, which includes: a power supply input end, which receives output power from the indoor unit; a power supply output end, which is connected to the power supply end of the first air conditioner communication device.

[0037] In some embodiments of the present application, when the main controller of the wire controller is the first main controller and the main controller of the indoor unit is the second main controller, the air conditioner communication system also includes: a power supply circuit, which includes: a power supply input end, which receives output power from the indoor unit; a power supply output end; a third protection circuit, which includes: an input side, which is connected to the power supply output end of the power supply circuit; and an output side, which is connected to the power supply end of the first air conditioner communication device.

[0038] In some embodiments of the present application, when the main controller of the indoor unit is the first main controller and the main controller of the outdoor unit is the second main controller, the air conditioner communication system also includes: a voltage protection circuit, which is connected between the signal coupling circuit of the first air conditioner communication device and the signal coupling circuit of the second air conditioner communication device.

[0039] The air conditioner communication device and communication system of the present application integrate multiple modules internally, can receive non-AMI signals and send out AMI signals, and receive outgoing AMI signals and can convert them into non-AMI signals for outgoing transmission, so as to realize signal communication using the communication device, with fewer peripheral circuits and less interference; through the cooperation of its internal filtering module and the internal active inductance module with the peripheral inductance adjustment circuit, the transmitted AMI signal is filtered and adjusted to ensure the accuracy of the AMI signal transmission signal; through the comparison module, threshold comparison is performed to reduce the AMI signal bit error rate, thereby improving the communication stability of the air conditioner communication device. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief introduction is given below to the drawings required for use in the embodiments of the present invention or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0041] Figure 1 A structural block diagram of a communication processing module in one embodiment of the air conditioner communication device proposed by the present invention;

[0042] Figure 2 A schematic diagram of a logic conversion module in an embodiment of an air conditioner communication device provided by the present invention;

[0043] Figure 3 The communication processing module and its peripheral circuit connection in the air conditioner communication device embodiment of the present invention Figure 1 ;

[0044] Figure 4 The structure frame of an embodiment of the air conditioner communication system proposed by the present invention is Figure 1 ;

[0045] Figure 5 A circuit diagram of a power supply circuit in one embodiment of the air conditioner communication system proposed by the present invention;

[0046] Figure 6 The structure frame of an embodiment of the air conditioner communication system proposed by the present invention is Figure 2 ;

[0047] Figure 7 It is a circuit diagram of a voltage protection circuit in an embodiment of an air conditioner system communication system proposed by the present invention. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0050] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0051] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0052] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0053] In the air conditioning system, the communication system is related to the response rate of the control function signal, correct control, etc. Therefore, whether the communication system is stable and good is directly related to whether the air conditioner can operate normally.

[0054] [Air conditioner communication device]

[0055] The air conditioner communication device includes a communication processing module 100 and its associated peripheral circuits.

[0056] The communication processing module 100 is the core part of the air conditioner communication device, and the peripheral circuit is configured according to the communication requirements of the communication processing module 100 .

[0057] See also Figure 1 The communication processing module 100 includes a signal input terminal DIN, a signal output terminal DOUT, a signal transceiver terminal AIO / BIO, a logic conversion module 110, a communication rate control module 120 / 120′, a filtering module 130, a comparison module 140 and an active inductor module 150.

[0058] In order to ensure the accurate transmission of AMI signals, the rate of AMI signals needs to be controlled. Figure 3 As shown, the peripheral circuit described above includes an inductance adjustment circuit 200 used in conjunction with the active inductor module 150 and a signal coupling circuit 300 / 300 ′ used to send and receive communication instructions for the communication processing module 100 .

[0059] Logic conversion module

[0060] The air conditioner communication device adopts the HomeBus communication protocol, which uses the AMI signal as a digital transmission signal, that is, the communication processing module 100 receives / sends the AMI signal.

[0061] The external part (eg, an external main controller) outputs a digital signal (eg, 10101) and inputs the digital signal to the communication processing module 100 through the signal input terminal DIN.

[0062] Since the communication signal received by the communication processing module 100 is a digital signal, the digital signal needs to be converted into an AMI signal by the logic conversion module 110 .

[0063] refer to Figure 2The logic conversion module 110 is mainly constructed by an inverter, a trigger (such as a T trigger), related gate circuits, and an AMI signal conversion loop formed by gate devices and switch devices.

[0064] exist Figure 2 In the figure, the signal input terminal DIN receives the digital signal 10101, and the inverted digital signal 01010 is used as the clock signal CP of the T flip-flop, and the T terminal receives the power supply high level signal VCC. Therefore, the Q terminal signal and the non-Q terminal signal enter the AMI signal conversion circuit respectively through their respective gate circuits. By controlling the control signal s1 / s2 of the AMI signal conversion circuit and the communication signal received at DIN, the on and off of different transistors in the AMI signal conversion circuit are controlled, and two AMI signals are output at AIO' and BIO'.

[0065] The reset signal of the logic conversion module 110 is selected to be a low level when the T flip-flop works.

[0066] Of course, other circuit implementations capable of implementing such AMI signal conversion are also included in the scope of protection claimed in this application.

[0067] Communication rate control module

[0068] Continue to refer Figure 1 Since the logic conversion module 110 outputs two AMI signals, the communication rate control module is required to control the communication rate of each output AMI signal.

[0069] The AMI signal outputted from AIO′ is subjected to communication rate control by the communication rate control module 120 and is sent to the signal transceiver AIO.

[0070] The AMI signal outputted from BIO' is subjected to communication rate control by the communication rate control module 120' and is sent to the signal receiving end BIO.

[0071] The communication rate control modules 120 and 120 ′ have the same structure, and the parameters in the communication rate control modules 120 and 120 ′ can be set according to the different rates of the two AMI signals.

[0072] Each of the communication rate control modules 120 and 120 ′ can select an RC integration circuit composed of a resistor and a capacitor, and utilize the filtering and charging and discharging effects of the RC integration circuit to adjust the rising and falling edges of the AMI signal and match different signal transmission rates.

[0073] While achieving communication signal rate control, it can also filter out clutter interference and reduce the impact of surge current on the accuracy of AMI signals.

[0074] Filter module

[0075] Continue to refer Figure 1 The filtering module 130 is used to receive and filter the two AMI signals from the signal transceiver terminals AIO and BIO.

[0076] The filter module 130 may be a high-pass filter module for performing high-pass filtering on the two AMI signals to suppress interference from low-frequency signals and DC components. The filter module 130 may contain an operational amplifier circuit to perform difference calculation on the two AMI signals and output an AMI difference signal to the comparison module 140 .

[0077] Comparison Modules

[0078] Continue to refer Figure 1 The comparison module 140 receives the AMI difference signal output by the filtering module 130, and switches the rising edge and falling edge of the AMI difference signal according to the set signal thresholds TVL and TVT, thereby reducing the signal transmission bit error rate, and finally outputs a digital signal at the signal output terminal DOUT.

[0079] The comparison module 140 can be constructed by an existing comparator circuit.

[0080] The signal thresholds TVL and TVT can be set as required.

[0081] Alternatively, if Figure 3 As shown, the signal thresholds TVL and TVT may also be determined by an external signal threshold adjustment circuit 400 .

[0082] The signal threshold adjustment circuit 400 is a loop formed by connecting a first resistor, a second resistor, a third resistor and a DC voltage in series. The signal thresholds TVL and TVT can select the voltage division at different voltage division points of the signal threshold adjustment circuit 400 .

[0083] The signal thresholds TVL and TVT are input to the comparison module 140 and used as the signal thresholds of the AMI difference signal to perform threshold limiting on the AMI difference signal, so as to output a signal at the signal output terminal DOUT.

[0084] Inductance adjustment

[0085] refer to Figure 1 and Figure 3The active inductor module 150 itself can be an active inductor or a circuit built using an active inductor. It adjusts the inductance of its own inductor according to the rate of the communication signal and cooperates with the peripheral inductor adjustment circuit 200. When the communication processing module 100 is used to transmit communication signals, it can better match different communication rates, thereby improving the transmission accuracy of the communication signal and improving the electromagnetic interference performance of the communication device.

[0086] Continue to refer Figure 1 The active inductor module 150 may be a circuit constructed of active inductors, which may include an active inductor 151 and an active inductor 152 .

[0087] See also Figure 1 The pins CAPP / HPA / VRAW / HP of the communication processing module 100 are four pins of the active inductor 151 , and CAPN / HNA / HN / GND are four pins of the active inductor 152 , where HP and HN are voltage differential inputs of the active inductor module 150 .

[0088] In order to protect the active inductor 151 and the active inductor 152 in the active inductor module 150 , the communication processing module 100 is further provided with a clamping circuit A between the pins HP and HN.

[0089] The clamping circuit A may be a clamping circuit commonly used in the prior art, for example, a clamping circuit constructed using a semiconductor diode or a Zener diode.

[0090] In order to match the communication rates of different communication signals, the active inductor module 150 is provided with an inductance adjustment circuit 200, wherein the inductance adjustment circuit 200 includes two parts: a first inductance adjustment circuit is provided at pins CAPP and HPA; and a second inductance adjustment circuit is provided at pins HNA and CAPN.

[0091] The first inductance adjustment circuit is connected in parallel at both ends of the pins CAPP and HPA, and comprises a first capacitor, a second capacitor and a resistor. The second capacitor and the resistor are connected in series and then connected in parallel with the first capacitor.

[0092] That is, two ends of the first capacitor are respectively connected to the pins CAPP and HPA of the active inductor module 150 for adjusting the inductance.

[0093] The connection point between the first capacitor and the resistor is connected to the pin CAPP, and the connection point between the first capacitor and the second capacitor is connected to the pin HPA. The first capacitor must be at least 10V / X7R series or above.

[0094] The second inductance adjustment circuit is connected in parallel across the pins CAPN and HNA, and includes a third capacitor, which is selected to be the same as the first capacitor.

[0095] The active inductance value of the active inductor module 150 (ie, the inductance value input to the pin between HP and HN) can be calculated according to the capacitance value of the first capacitor and the current value flowing through the load connected to the VRAW pin when the HP and HN input voltages are equal.

[0096] First protection circuit

[0097] A first protection circuit 160 (such as Figure 1 (shown in the dashed box).

[0098] A first protection circuit 160 ′ (such as Figure 1 (shown in the dashed box).

[0099] The first protection circuits 160 and 160 ′ provide internal protection for the communication processing module 100 to prevent damage by surge voltage and surge current superimposed on the transmission signal.

[0100] The first protection circuit 160 and 160 'can be an overcurrent and overvoltage protection circuit in the prior art.

[0101] The first protection circuit 160 is used to perform over-current and over-voltage protection on the AMI signal output by the communication rate control module 120 , and to perform over-current and over-voltage protection on the AMI signal input to the communication processing module 100 via the signal transceiver terminal AIO.

[0102] The first protection circuit 160 ′ is used to protect the AMI signal output by the communication rate control module 120 ′ from over-current and over-voltage, and to protect the AMI signal input to the communication processing module 100 from over-current and over-voltage from external sources through the signal transceiver terminal BIO.

[0103] Signal coupling circuit

[0104] Continue to refer Figure 3 Since the communication processing module 100 outputs two AMI signals, one AMI signal is output at the signal transceiver terminal AIO, and the other AMI signal is output at the signal transceiver terminal BIO.

[0105] When an AMI signal reaches a certain frequency, it needs to be sent out through the signal coupling circuit 300, or the external AMI signal can be accurately identified and processed accordingly by the communication processing module 100 after being coupled by the signal coupling circuit 300.

[0106] When another AMI signal reaches a certain frequency, it needs to be sent out through the signal coupling circuit 300 ′, or the external AMI signal can be accurately identified and processed accordingly by the communication processing module 100 after being coupled through the signal coupling circuit 300 ′.

[0107] The signal coupling circuits 300 and 300 ′ have the same structure.

[0108] The structure of the signal coupling circuit 300 is taken as an example for description.

[0109] The signal coupling circuit 300 includes a first capacitor located at the signal transceiver terminal AIO and a first electrolytic capacitor connected in parallel with the first capacitor.

[0110] The connection point where the first capacitor is connected to the positive terminal of the first electrolytic capacitor is connected to the signal transceiver terminal AIO, which serves as one end of the signal coupling circuit 300.

[0111] The connection point where the first capacitor is connected to the negative terminal of the first electrolytic capacitor serves as the other end of the signal coupling circuit 300 .

[0112] Terminal adjustment circuit

[0113] refer to Figure 3 The terminal adjustment circuit 500 is arranged at the signal transceiver terminals AIO and BIO to ensure signal transmission.

[0114] The terminal adjustment circuit 500 includes a first I / O side and a second I / O side. The first I / O side is connected between the signal transceiver terminals AIO and BIO. Two ends of the second I / O side are respectively connected to one end of the signal coupling circuit 300 and one end of the signal coupling circuit 300'.

[0115] The terminal adjustment circuit 500 may include a resistor, or a resistor and a capacitor in parallel. The resistor is used to solve the problem of communication waveform delay, and the capacitor is used to eliminate noise and improve the quality of the transmission signal.

[0116] Second protection circuit

[0117] A second protection circuit 600 may be provided between the signal transceiver terminal AIO and one end of the signal coupling circuit 300 , and a second protection circuit 600 ′ may be provided between the signal transceiver terminal BIO and one end of the signal coupling circuit 300 ′.

[0118] The second protection circuits 600 and 600 ′ are used to prevent the communication processing module 100 from being damaged when an external lightning surge signal enters the communication processing module 100 through the signal transceiver terminals AIO and BIO respectively.

[0119] The second protection circuits 600 and 600 ′ can be respectively selected as surge protection circuits.

[0120] The surge protection circuit includes a resistor and a transient voltage suppressor diode TVS, one end of the resistor is connected to the cathode of the TVS, the anode of the TVS is grounded, the other end of the resistor forms a third I / O side of the surge protection circuit, and a connection point between one end of the resistor and the cathode of the TVS forms a fourth I / O side of the surge protection circuit.

[0121] When the two poles of the TVS are subjected to a reverse transient high-energy impact, it can change the high impedance between the two poles into a low impedance at a speed of 10 to the negative 12th power of seconds, absorbing surge power of up to several kilowatts, clamping the voltage between the two poles to a predetermined value, and effectively protecting the communication processing module 100 from damage by various surge pulses.

[0122] The third I / O side of a surge protection circuit is connected to the signal transceiver terminal AIO, and the fourth I / O side is connected to one end of the signal coupling circuit 300 .

[0123] The third I / O side of a surge protection circuit is connected to the signal transceiver terminal BIO, and the fourth I / O side is connected to one end of the signal coupling circuit 300 ′.

[0124] For comprehensive protection of the communication processing module 100, refer to Figure 3 The first I / O side of the terminal adjustment circuit 500 is connected between the signal transceiver terminals AIO and BIO, and the two ends of the second I / O side of the terminal adjustment circuit 500 are respectively connected to the third I / O side of the second protection circuit 600 and the third I / O side of the second protection circuit 600'.

[0125] The fourth I / O side of the second protection circuit 600 is connected to one end of the signal coupling circuit 300 .

[0126] The fourth I / O side of the second protection circuit 600 ′ is connected to one end of the signal coupling circuit 300 ′.

[0127] Reset module

[0128] refer to Figure 1 The communication processing module 100 further includes a reset module 170, which receives a reset signal RST from the outside to ensure that the communication processing module 100 can be reset and restarted in an abnormal situation.

[0129] refer to Figure 2 The reset function in the reset module 170 is integrated in the logic conversion module 110, and the reset signal RST from the outside is used as the reset signal of the T flip-flop in the logic conversion module 110 and is reset at a high level.

[0130] When the RST signal input is high level, the T flip-flop is reset, and at the same time, the AMI signals output at AIO' and BIO' are cleared through the NOR gate circuit, the NAND gate circuit and the AMI signal conversion circuit, thereby achieving the purpose of reset.

[0131] Load power supply circuit

[0132] refer to Figure 1 A load power supply circuit 180 is additionally provided in the communication processing module 100 for outputting a voltage signal for additional use by an external load.

[0133] The load power supply circuit 180 may be selected as a 5V LDO (low dropout regulator) module.

[0134] refer to Figure 3 Corresponding to the load power supply circuit 180, a voltage regulating circuit 700 should be provided to coordinate therewith, so as to regulate a voltage signal for use by an external load.

[0135] The voltage regulating circuit 700 may include a first capacitor and a second capacitor connected in parallel, which, in addition to providing a voltage signal for an external load, can also absorb surge voltages from the signal transceiver terminals AIO and BIO.

[0136] The air conditioner communication device can integrate multiple modules into one, optimize its peripheral circuits, reduce peripheral circuits, reduce interference, and reduce the difficulty of installation.

[0137] The communication processing module 100 is additionally provided with a signal coupling circuit 300 / 300', a surge protection circuit, a terminal adjustment circuit 500 and a voltage adjustment circuit 700, so as to enhance the anti-interference capability of the air conditioner communication device and improve the robustness of the communication system.

[0138] The air conditioner communication device is used for system communication, which needs to include a first main controller B, a first air conditioner communication device, a second main controller C and a second air conditioner communication device.

[0139] The first air conditioner communication device and the second air conditioner communication device are both the air conditioner communication devices as described above.

[0140] The first main controller B has a first input terminal and a first output terminal. The digital signal outputted from the first output terminal is supplied to the signal input terminal DIN of the first air conditioner communication device. The signal outputted from the signal output terminal DOUT of the first air conditioner communication device is supplied to the first input terminal.

[0141] The second main controller C has a second input terminal and a second output terminal. The digital signal outputted from the second output terminal is supplied to the signal input terminal DIN of the second air conditioner communication device. The signal outputted from the signal output terminal DOUT of the second air conditioner communication device is supplied to the second input terminal.

[0142] The signal coupling circuit 300 of the first air conditioner communication device is connected correspondingly to the signal coupling circuit 300 of the second air conditioner communication device.

[0143] The signal coupling circuit 300 ′ of the first air conditioner communication device is connected correspondingly to the signal coupling circuit 300 ′ of the second air conditioner communication device.

[0144] In addition, it is also necessary to supply power to both the power-consuming components in the first air conditioner communication device and the power-consuming components in the second air conditioner communication device.

[0145] In this way, when the first main controller B sends a first communication instruction to the second main controller C, the digital signal output from the first output terminal of the first main controller B is processed into an AMI signal by the communication processing module 100 in the first air conditioner communication device and coupled to the signal coupling circuit 300 / 300' in the second air conditioner communication device through the signal coupling circuit 300 / 300'.

[0146] Thereafter, the communication processing module 100 in the second air conditioner communication device receives and converts the digital signal into a digital signal and outputs it from the signal output terminal DOUT to the second input terminal of the second main controller C. At this time, the communication instruction transmission from the first main controller B to the second main controller C is completed.

[0147] Similarly, the communication instruction transmission from the second main controller C to the first main controller B can be completed.

[0148] The peripheral circuits of the communication processing module 100 in the first air conditioner communication device and the communication processing module 100 in the second air conditioner communication device are designed to ensure that the communication instructions between the first main controller B and the second main controller C can be transmitted reliably and accurately.

[0149] For the air conditioner, there is a communication relationship between the wire controller side and the indoor unit side, and between the indoor unit side and the outdoor unit side. The air conditioner communication device can realize the communication between the wire controller side and the indoor unit side, and between the indoor unit side and the outdoor unit side.

[0150] See also Figure 4 , which shows a structural diagram of the communication between the wire controller side and the indoor unit side.

[0151] For the convenience of explanation, the air conditioner communication device on the wire controller side is recorded as a first air conditioner communication device, and the air conditioner communication device on the indoor unit side is recorded as a second air conditioner communication device.

[0152] The first controller B is recorded as the main controller on the wired controller side.

[0153] The second controller C is recorded as the master controller on the indoor unit side.

[0154] The wire controller is set indoors, so for the convenience of power supply, on the wire controller side, the communication processing module 100 in the first air conditioner communication device is powered by the indoor unit side through the power supply circuit 800.

[0155] refer to Figure 4 and Figure 5 The power supply unit 800 mainly includes a filter circuit and a rectifier circuit connected in sequence, and the rectified voltage is input to the power supply end of the communication processing module 100 in the first air conditioner communication device.

[0156] The filter circuit may include a capacitor E5, a resistor R19 and an inductor L1 (eg, a common-mode inductor). The resistor R19 is connected in parallel with the capacitor E5, and the parallel resistor R19 and capacitor E5 are connected in series with the inductor L1.

[0157] The rectifier circuit may be a silicon bridge, which has a bridge rectifier circuit composed of four rectifier diodes.

[0158] The HP and HN pins of the communication processing module 100 in the first air conditioner communication device form the power supply end of the communication processing module 100 .

[0159] In order to protect the HP and HN pins from being damaged, a third protection circuit 700 is further provided between the power supply output terminal of the power supply unit 800 and the power supply terminal of the communication processing module 100 .

[0160] The third protection circuit 700 may be selected as a surge protection circuit.

[0161] The surge protection circuit includes a resistor and a transient voltage suppression diode TVS. The cathode of the TVS is connected to one end of the resistor, the anode of the TVS is connected to the HN pin, and the other end of the resistor is connected to the HP pin.

[0162] Of course, the signal coupling circuit 300 / 300' on the wire controller side and the signal coupling circuit 300 / 300' on the indoor unit side may also be connected to the power supply line of the power supply unit 800 accordingly, such as Figure 4 and Figure 5 shown.

[0163] refer to Figure 6 , which shows a structural diagram of communication between the indoor unit side and the outdoor unit side.

[0164] For the sake of convenience, the air conditioner communication device on the indoor unit side is referred to as a first air conditioner communication device, and the air conditioner communication device on the outdoor unit side is referred to as a second air conditioner communication device.

[0165] The first controller B is recorded as the master controller on the indoor unit side.

[0166] The second controller C is recorded as the master controller on the outdoor unit side.

[0167] The communication between the indoor unit and the outdoor unit is as follows: Figure 4 The communication between the remote controller side and the indoor unit side is the same as described above, except for the following two points.

[0168] 1. Power the first air conditioner communication device on the indoor unit side and the second air conditioner communication device on the outdoor unit side separately.

[0169] 2. A voltage protection circuit 800 is provided between the indoor unit side signal coupling circuit 300 / 300' and the outdoor unit side signal coupling circuit 300 / 300'.

[0170] refer to Figure 7 The voltage protection circuit 800 is formed by varistors Z1, Z2, Z3, Z4, diodes D1, D2, D3 and D4. When the air conditioner is struck by lightning or high voltage, the communication loop between the indoor unit side signal coupling circuit and the outdoor unit side signal coupling circuit will be clamped by the varistor to prevent overvoltage from damaging the air conditioner communication system, thereby improving the working safety and reliability of the communication system.

[0171] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An air conditioner communication device, characterized in that: include: The communication processing module comprises: A logic conversion module, which receives a communication signal from a signal input terminal and converts the communication signal into an AMI signal; A communication rate control module, which is used to control and adjust the rate of the AMI signal received and output by the logic conversion module, and output the adjusted AMI signal to the signal transceiver; A filtering module, which is used to receive and filter the AMI signal from the signal transceiver; A comparison module performs threshold comparison on the filtered AMI signal and outputs it to a signal output terminal; Active inductor module; an inductance adjustment circuit, which cooperates with the active inductor module to adjust the inductance of the active inductor in the active inductor module according to the communication rate of the AMI signal; The signal coupling circuit is arranged at the signal transceiver end and is used for transmitting and receiving the adjusted AMI signal.

2. The air conditioner communication device according to claim 1, characterized in that: The communication processing module also includes: The first protection circuit is arranged at the signal transceiver end and is used for protecting the signal output by the communication rate control module and the signal input to the filter module.

3. The air conditioner communication device according to claim 1 or 2, characterized in that: The air conditioner communication device also includes: a terminal adjustment circuit, comprising a first I / O side and a second I / O side, wherein the first I / O side is connected to the signal transceiver terminal; a second protection circuit comprising a third I / O side and a fourth I / O side, the third I / O side being connected to the second I / O side, and the fourth I / O side being connected to the signal coupling circuit; Alternatively, the air conditioner communication device further comprises: A terminal adjustment circuit, comprising a first I / O side and a second I / O side, wherein the first I / O side is connected to the signal transceiver terminal, and the second I / O side is connected to the signal coupling circuit; Alternatively, the air conditioner communication device further comprises: The second protection circuit includes a third I / O side and a fourth I / O side, wherein the third I / O side is connected to the signal transceiver end, and the fourth I / O side is connected to the signal coupling circuit.

4. The air conditioner communication device according to claim 1, characterized in that: The communication processing module also includes: A reset module receives an external reset signal and is used to reset the communication processing module.

5. The air conditioner communication device according to claim 1, characterized in that: The communication processing module also includes: The load power supply circuit outputs a power supply voltage for an external load.

6. The air conditioner communication device according to claim 1, characterized in that: The air conditioner communication device also includes: A signal threshold adjustment circuit is connected to the comparison module and is used to adjust the threshold.

7. An air conditioner communication system, characterized in that: include: A first air conditioner communication device, which is an air conditioner communication device as claimed in any one of claims 1 to 6; The first master controller has: a first input terminal connected to a signal output terminal of the first air conditioner communication device; a first output terminal connected to a signal input terminal of the first air conditioner communication device; A second air conditioner communication device, which is an air conditioner communication device as claimed in any one of claims 1 to 6; The second master controller has: a second input terminal connected to a signal output terminal of the second air conditioner communication device; A second output terminal, which is connected to the signal input terminal of the second air conditioner communication device; The signal coupling circuit of the first air conditioner communication device is communicatively connected to the signal coupling circuit of the second air conditioner communication device.

8. The air conditioner communication system according to claim 7, characterized in that: The air conditioner comprises an indoor unit, a wire controller and an outdoor unit respectively communicating with the indoor unit; The main controller of the wire controller is the first main controller, and the main controller of the indoor unit is the second main controller; or The main controller of the indoor unit is a first main controller, and the main controller of the outdoor unit is the second main controller.

9. The air conditioner communication system according to claim 8, characterized in that: When the master controller of the wire controller is the first master controller and the master controller of the indoor unit is the second master controller, The air conditioner communication system also includes: A power supply circuit comprising: A power supply input terminal, which receives output power from the indoor unit; a power supply output terminal connected to the power supply terminal of the first air conditioner communication device; or The air conditioner communication system also includes: A power supply circuit comprising: A power supply input terminal, which receives output power from the indoor unit; Power supply output terminal; A third protection circuit comprising: An input side connected to the power supply output terminal; The output side is connected to the power supply end of the first air conditioner communication device.

10. The air conditioner communication system according to claim 8, characterized in that: When the master controller of the indoor unit is the first master controller and the master controller of the outdoor unit is the second master controller, The air conditioner communication system also includes: A voltage protection circuit is connected between the signal coupling circuit of the first air conditioner communication device and the signal coupling circuit of the second air conditioner communication device.

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