Communication circuit based on wire controller, wire controller and air conditioning system

Abstract

The invention relates to a communication circuit based on a wire controller, the wire controller and an air conditioning system. The circuit comprises a wire controller main chip, a communication chip, a communication state control module, a communication and power supply control module and an indoor unit, the wire controller main chip is connected with the communication chip and the communication state control module, the communication state control module and the communication chip are connected with the communication and power supply control module, and the communication and power supply control module is connected with the indoor unit through a power supply bus. If the communication chip is normal, the communication chip is used for converting a communication signal sent by the wire controller main chip and coupling the signal to a power supply bus based on the communication and power supply control module so as to output the signal to an indoor unit; and when the communication chip is abnormal, the communication state control module is used for conducting the wire controller main chip and the communication and power supply control module to transmit a communication signal to the communication and power supply control module, and the signal is coupled to the power supply bus to be transmitted to the indoor unit. The communication between the wire controller main chip and the indoor unit is realized when the communication chip is abnormal, so that the reliability of the communication between the wire controller and the indoor unit can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of air-conditioning control, and in particular to a communication circuit based on a wire controller, a wire controller and an air-conditioning system. Background Art

[0002] The wire controller is a multifunctional smart accessory, which is widely used in commercial air conditioners and household duct systems, providing users with a convenient operation experience. In the installation of the wire controller, through a simple wall installation method, it can be closely connected to the air conditioner indoor unit by relying on only two power supply buses through carrier communication. Among them, the two power supply buses are not only responsible for power supply to ensure the normal operation of the wire controller, but also for communication to realize data transmission and control command issuance between the wire controller and the air conditioner indoor unit.

[0003] However, when the communication chip or communication circuit is damaged due to long-term use, unstable voltage or external interference, the wire controller loses the ability to communicate with the air conditioner, resulting in the user being unable to operate the air conditioner through the wire controller until the wire controller is repaired. Therefore, it is particularly important to ensure that the wire controller can still communicate with the air conditioner in a simple manner when the communication chip or communication circuit is damaged, restore some functions of the wire controller and the air conditioner, improve the user experience, and improve the reliability of the wire controller. Summary of the invention

[0004] The present application provides a communication circuit, a wire controller and an air conditioning system based on a wire controller to solve the technical problem that when the communication chip or the communication circuit is damaged, the wire controller cannot communicate with the air conditioner indoor unit and there is poor communication reliability between the wire controller and the air conditioner indoor unit.

[0005] According to one aspect of an embodiment of the present application, the present application provides a communication circuit based on a wire controller, including a wire controller main chip, a communication chip, a communication status control module, a communication and power control module, and an indoor unit; the wire controller main chip is connected to one end of the communication chip and the communication status control module, the other end of the communication status control module and the communication chip is connected to one end of the communication and power control module, and the other end of the communication and power control module is connected to the indoor unit through a power supply bus; when the communication chip communicates normally, the communication chip is used to convert the communication signal sent by the wire controller main chip, and perform signal coupling based on the communication and power control module to couple the converted communication signal to the power supply bus, and output it to the indoor unit through the power supply bus; when the communication chip communicates abnormally, the communication status control module is used to conduct the connection between the wire controller main chip and the communication and power control module, transmit the communication signal sent by the wire controller main chip to the communication and power control module for signal coupling, so as to couple the communication signal to the power supply bus, and transmit it to the indoor unit through the power supply bus.

[0006] Optionally, the wire controller main chip includes a first port, a second port and a third port; when the communication chip communicates normally, the first port of the wire controller main chip is a receiving end, the second port of the wire controller main chip is a transmitting end, and the third port of the wire controller main chip is an enabling end; when the communication chip communicates abnormally, the first port and the second port of the wire controller main chip are transmitting ends, and the third port of the wire controller main chip is an enabling end.

[0007] Optionally, the communication status control module includes a first switch tube and a second switch tube; the base of the first switch tube and the second switch tube are connected to the third port of the wire controller main chip, the collector of the first switch tube is connected to the first port of the wire controller main chip, the collector of the second switch tube is connected to the second port of the wire controller main chip, and the emitters of the first switch tube and the second switch tube are connected to the communication and power control module.

[0008] Optionally, when the communication chip communicates abnormally, the first port of the wire controller main chip is used to output a first differential signal to the collector of the first switch tube, the second port of the wire controller main chip is used to output a second differential signal to the collector of the second switch tube, and the third port of the wire controller main chip is used to output a high-level signal to the base of the first switch tube and the second switch tube; the indoor unit is used to receive the first differential signal and the second differential signal and calculate the difference, and identify whether the difference is in line with the first difference range or the second difference range; if the difference is in line with the first difference range and the indoor unit outputs the first digital signal, or the difference is in line with the second difference range and the indoor unit outputs the second digital signal, then the indoor unit is also used to determine that the communication line based on the communication status control module is communicating normally.

[0009] Optionally, the communication and power control module includes a first resistor, a second resistor, a first capacitor and a second capacitor; the first resistor is connected in series with the first capacitor, and one end of the first resistor is connected to the communication chip and the emitter of the first switch tube, and one end of the first capacitor is connected to the first interface of the indoor unit through the ground wire of the power supply bus; the second resistor is connected in series with the second capacitor, and one end of the second resistor is connected to the communication chip and the emitter of the second switch tube, and one end of the second capacitor is connected to the second interface of the indoor unit through the power line of the power supply bus.

[0010] Optionally, it also includes a power conversion module, one end of which is connected to the power supply bus, and the other end of which is connected to the wire controller main chip and the communication chip, and is used to obtain power from the internal machine and convert it into working power for the wire controller main chip and the communication chip.

[0011] Optionally, after the wire controller main chip sends a communication signal based on the communication chip, the wire controller main chip is also used to receive, through a receiving end, a feedback signal sent back by the internal machine based on the communication and power control module and the communication chip. If the feedback signal is not received within a preset time, the wire controller main chip determines that the communication of the communication chip is abnormal.

[0012] Optionally, it also includes a wire controller display module, which is connected to the wire controller main chip and is used for function display and issuing fault prompt information when communication is abnormal.

[0013] According to another aspect of an embodiment of the present application, the present application provides a wire controller, including the above-mentioned communication circuit based on the wire controller.

[0014] According to another aspect of an embodiment of the present application, the present application provides an air-conditioning system, the air conditioner comprising: at least one indoor unit; and a wire controller as described above, the wire controller communicates with the indoor unit based on the communication circuit based on the wire controller.

[0015] The above technical solution provided by the embodiment of the present application has the following advantages compared with the related art:

[0016] The present application provides a communication circuit based on a wire controller, by adding a communication status control module in the circuit for interaction between the wire controller and the indoor unit, connecting one end of the communication status control module to the wire controller main chip, and connecting the other end to the communication and power control module and then to the indoor unit through the power supply bus. If the communication chip is abnormal and communication cannot be achieved, the wire controller main chip can control the communication status control module to be turned on, thereby turning on the connection between the wire controller main chip and the indoor unit. Even if the communication chip is abnormal, the communication signal sent by the wire controller main chip can be coupled to the power supply bus based on the communication status control module, and the communication signal can be transmitted to the indoor unit by utilizing the DC isolation and AC passing characteristics of the communication and power control module. Similarly, communication between the wire controller main chip and the indoor unit can be achieved, which can improve the reliability of communication between the wire controller and the indoor unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the drawings required for use in the embodiments or the related technical descriptions are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0019] Figure 1 A schematic diagram of a module of an optional communication circuit based on a wire controller provided according to an embodiment of the present application;

[0020] Figure 2 A control flow chart of an optional communication circuit based on a wire controller provided according to an embodiment of the present application;

[0021] Figure 3 A circuit diagram of an optional communication circuit based on a wire controller provided according to an embodiment of the present application;

[0022] Figure 4 A schematic diagram of a module of another optional communication circuit based on a wire controller provided according to an embodiment of the present application.

[0023] Description of the drawings: 1. Main chip of wire controller, 2. Communication chip, 3. Communication status control module, 4. Communication and power control module, 5. Inner unit, 6. Power conversion module. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0025] The principle and structure of the present application are described in detail below with reference to the accompanying drawings and embodiments.

[0026] In order to solve the above-mentioned technical problem that when the communication chip or the communication circuit is damaged, the wire controller cannot communicate with the indoor unit of the air conditioner, and the communication reliability between the wire controller and the indoor unit of the air conditioner is poor.

[0027] In response to the above problems, the design idea of ​​the present application is to add a communication status control module in the circuit for interaction between the wire controller and the indoor unit, connect one end of the communication status control module to the wire controller main chip, and connect the other end to the communication and power control module and then to the indoor unit through the power supply bus. If the communication chip is abnormal and communication cannot be achieved, the wire controller main chip can control the communication status control module to be turned on, thereby turning on the connection between the wire controller main chip and the indoor unit. Even if the communication chip is abnormal, the communication signal sent by the wire controller main chip can be coupled to the power supply bus based on the communication status control module, and the communication signal can be transmitted to the indoor unit by utilizing the DC isolation and AC passing characteristics of the communication and power control module. Similarly, communication between the wire controller main chip and the indoor unit can be achieved, which can improve the reliability of communication between the wire controller and the indoor unit.

[0028] Combination Figure 1 As shown, in an embodiment of the present application, a communication circuit based on a wire controller is provided, including a wire controller main chip 1, a communication chip 2, a communication state control module 3, a communication and power control module 4 and an internal unit 5;

[0029] The main chip 1 of the wire controller is connected to one end of the communication chip 2 and the communication state control module 3, the other end of the communication state control module 3 and the communication chip 2 is connected to one end of the communication and power control module 4, and the other end of the communication and power control module 4 is connected to the indoor unit 5 through the power supply bus;

[0030] When the communication chip 2 communicates normally, the communication chip 2 is used to convert the communication signal sent by the wire controller main chip 1, and perform signal coupling with the power control module 4 based on the communication, so as to couple the converted communication signal to the power bus, and output it to the indoor unit 5 through the power bus;

[0031] When the communication chip 2 communicates abnormally, the communication status control module 3 is used to conduct the connection between the wire controller main chip 1 and the communication and power control module 4, and transmits the communication signal sent by the wire controller main chip 1 to the communication and power control module 4 for signal coupling, so as to couple the communication signal to the power supply bus and transmit it to the indoor unit 5 through the power supply bus.

[0032] In this embodiment, the indoor unit 5 is an indoor unit of an air conditioner, and the corresponding wire controller is used to control the indoor unit of the air conditioner. The communication method between the wire controller main chip 1 and the indoor unit 5 is carrier communication, that is, a communication and power supply method that couples power supply and communication signals together. On the power supply bus (power line and ground line), there is both the working power provided by the indoor unit 5 to the wire controller main chip 1 and the communication signal sent by the wire controller main chip 1 or the indoor unit 5.

[0033] Among them, the above-mentioned wire controller main chip 1 can be used to control the sending of communication signals, the receiving of feedback signals from the indoor unit 5, the prompt of abnormal conditions, the control of the operation mode of the indoor unit 5, the status display, etc. The above-mentioned communication chip 2 can be used to convert the communication signal sent by the wire controller main chip 1 and send it to the communication and power control module 4 when the communication chip 2 communicates normally. The above-mentioned communication state control module 3 can be used to conduct the connection between the wire controller main chip 1 and the communication and power control module 4 when the communication chip 2 is abnormal, and send the communication signal sent by the wire controller main chip 1 to the communication and power control module 4. The above-mentioned communication and power control module 4 can use the DC isolation and AC pass characteristics to realize the coupling and separation of carrier communication and DC power supply, so as to couple the communication signal transmitted by the communication chip 2 or the communication state control module 3 to the power supply bus and transmit it to the indoor unit 5 through the power supply bus. The above-mentioned indoor unit 5 can be used to interact with the wire controller main chip 1 on the premise of being able to communicate with the wire controller main chip 1, and can perform various operation controls on the indoor unit of the air conditioner according to different instructions sent by the wire controller main chip 1.

[0034] In some examples, the communication chip 2 is integrated into the wire controller. Figure 2 As shown, when the communication chip 2 is in normal working state, the wire controller main chip 1 and the indoor unit 5 can communicate normally. By connecting one end of the communication chip 2 to the wire controller main chip 1 and the other end to one end of the communication and power control module 4, and the other end of the communication and power control module 4 to the indoor unit 5 through the power supply bus, the communication chip 2 can convert the communication signal sent by the wire controller main chip 1 into a protocol, and use the DC isolation and AC passing characteristics of the communication and power control module 4 to isolate the DC power supply on the power supply bus, but the converted output communication signal can pass and be output to the indoor unit 5, thereby controlling the operation of the air conditioner.

[0035] The communication signal can be sent via UART signal, and the communication chip 2 can convert the UART signal into a signal of the preset HomeBus protocol, couple it to the power supply bus, and transmit it to the indoor unit 5 via carrier communication. After the indoor unit 5 recognizes the communication signal sent by the wire controller main chip 1, it can provide signal feedback to the wire controller main chip 1, thereby indicating that the communication between the two is normal. Subsequently, the indoor unit 5 can receive various control instructions sent by the wire controller main chip 1, thereby driving the air conditioner to perform various operations, such as adjusting the working mode, increasing the air volume, etc. The various control instructions sent by the wire controller main chip 1 can refer to various instructions sent by the user.

[0036] In other examples, combined with Figure 2As shown, when the communication chip 2 is abnormal, the wire controller main chip 1 and the indoor unit 5 cannot communicate through the communication chip 2. At this time, the wire controller main chip 1 can send a low-level signal to the communication state control module 3 to control the communication state control module 3 to be turned on. At the same time, the communication chip 2 is disconnected when the low-level signal is output, so that the communication state control module 3 turns on the connection between the wire controller main chip 1 and the communication and power control module 4, and then the communication signal sent by the wire controller main chip 1 can be coupled to the power supply bus, and the DC isolation and AC pass characteristics of the communication and power control module 4 are used to isolate the DC power supply on the power supply bus, and the communication signal transmitted based on the communication state control module 3 is output to the indoor unit 5, thereby controlling the operation of the indoor unit of the air conditioner. That is, in the case of abnormal communication of the communication chip 2, the communication between the wire controller main chip 1 and the indoor unit 5 can still be realized to realize the data interaction function between the two.

[0037] In the embodiment of the present application, a communication status control module 3 is added to the circuit for interaction between the wire controller and the indoor unit 5, one end of the communication status control module 3 is connected to the wire controller main chip 1, and the other end is connected to the communication and power supply control module 4 and then connected to the indoor unit 5 based on the power supply bus. If the communication chip 2 is abnormal and communication cannot be achieved, the wire controller main chip 1 can control the communication status control module 3 to be turned on, thereby turning on the connection between the wire controller main chip 1 and the indoor unit 5. Even if the communication chip 2 is abnormal, the communication signal emitted by the wire controller main chip 1 can be coupled to the power supply bus based on the communication status control module 3, and the communication signal can be transmitted to the indoor unit 5 by utilizing the DC isolation and AC passing characteristics of the communication and power supply control module 4. Similarly, communication between the wire controller main chip 1 and the indoor unit 5 can be achieved, which can improve the reliability of communication between the wire controller and the indoor unit 5.

[0038] In some optional embodiments, combined with Figure 3 As shown, the wire controller main chip 1 includes a first port, a second port and a third port;

[0039] When the communication chip 2 communicates normally, the first port of the wire controller main chip 1 is a receiving end, the second port of the wire controller main chip 1 is a transmitting end, and the third port of the wire controller main chip 1 is an enabling end;

[0040] When the communication chip 2 is in communication abnormality, the first port and the second port of the wire controller main chip 1 are transmitting ends, and the third port of the wire controller main chip 1 is an enabling end.

[0041] In some examples, the wire controller main chip 1 includes a first port, a second port and a third port. Of course, it may also include other ports, such as a power port, etc. Since communication based on the communication chip 2 is the default communication mode, and communication based on the communication status control module 3 is the standby mode, therefore, when the communication chip 2 is in a normal communication state, the first port, the second port and the third port are connected to the communication chip 2, and the first port on the wire controller main chip 1 is used as a receiving end, the second port is used as a sending end, and the third port is used as an enabling end. Among them, the receiving end is used for the wire controller main chip 1 to receive a signal sent by the indoor unit 5 based on the communication chip 2, the sending end is used for the wire controller main chip 1 to send a signal to the indoor unit 5 based on the communication chip 2, and the enabling end is used to output a high level to control the communication chip 2 to be enabled and the communication status control module 3 to be disconnected.

[0042] In other examples, since the normal communication function cannot be achieved due to a failure of the communication chip 2, the communication program of the wire controller main chip 1 can be formatted, and the first port and the second port of the wire controller main chip 1 are configured as sending ends, and the third port is still used as an enable end to output a low level to control the communication chip 2 to disconnect and the communication status control module 3 to turn on. When the communication status control module 3 is turned on, the two I / O ports, the first port and the second port, cooperate to send a differential signal in a format corresponding to the communication of the communication status control module 3, so that the internal machine 5 can determine whether communication with the wire controller main chip 1 can be achieved based on the received differential signal, so as to further perform data interaction.

[0043] In this embodiment, when the communication chip 2 fails and the communication function cannot be realized, the functions of the three ports of the wire controller main chip 1 are adjusted so that when the communication chip 2 is disconnected and the communication status control module 3 is turned on by outputting a low level at the enable end, the wire controller main chip 1 can send differential signals to the indoor unit 5 through the first port and the second port serving as the sending end, respectively, so that the indoor unit 5 can determine whether it is possible to communicate with the wire controller main chip 1 and perform data exchange based on the received differential signal.

[0044] In some optional embodiments, combined with Figure 3 As shown, the communication state control module 3 includes a first switch tube and a second switch tube;

[0045] The bases of the first switch tube and the second switch tube are connected to the third port of the wire controller main chip 1, the collector of the first switch tube is connected to the first port of the wire controller main chip 1, the collector of the second switch tube is connected to the second port of the wire controller main chip 1, and the emitters of the first switch tube and the second switch tube are connected to the communication and power control module 4.

[0046] The first switch tube Q1 and the second switch tube Q2 can be PNP transistors, or PMOS transistors or other circuits with low level on and high level off. In this embodiment, the first switch tube Q1 and the second switch tube Q2 are described as PNP transistors.

[0047] In this embodiment, when the communication chip 2 communicates abnormally, because the base of the PNP transistor Q1 and the PNP transistor Q2 are connected to the enable end (the third port) of the wire controller main chip 1, a low-level signal is sent through the enable end to stop the damaged communication chip 2 from working. At this time, the base of the PNP transistor Q1 and the PNP transistor Q2 receives the low-level signal, and the emitters of the PNP transistor Q1 and the PNP transistor Q2 are connected to the power supply bus, and the base voltage is lower than the emitter voltage. At this time, the PNP transistor Q1 and the PNP transistor Q2 meet the conduction conditions and are turned on.

[0048] Furthermore, after the PNP transistor Q1 and the PNP transistor Q2 are turned on, the differential signal emitted by the wire controller main chip 1 can be coupled to the power supply bus after being DC-isolated and AC-connected based on the communication and power control module 4, and then the differential signal can be transmitted to the indoor unit 5 in a carrier communication manner based on the power supply bus.

[0049] In this embodiment, the base of the PNP transistor Q1 and the PNP transistor Q2 are connected to the enable end of the wire controller main chip 1, and the emitter is connected to the power supply bus. When the enable end outputs a low-level signal, the PNP transistor Q1 and the PNP transistor Q2 can be controlled to be turned on, and the faulty communication chip 2 can be controlled to be disconnected, so that the differential signal generated by the wire controller main chip 1 can be isolated and coupled to the power supply bus based on the communication and power control module 4, and the differential signal is transmitted to the indoor unit 5 based on the power supply bus, so that when the communication chip 2 fails, the indoor unit 5 determines that the communication function can be realized through the backup communication method, and communicates based on the PNP transistor Q1 and the PNP transistor Q2, which is conducive to ensuring the normal data interaction between the wire controller main chip 1 and the indoor unit 5, improving reliability, and ensuring user experience.

[0050] In some optional embodiments, when the communication chip 2 is abnormal in communication, the first port of the wire controller main chip 1 is used to output a first differential signal to the collector of the first switch tube, the second port of the wire controller main chip 1 is used to output a second differential signal to the collector of the second switch tube, and the third port of the wire controller main chip 1 is used to output a high level signal to the base of the first switch tube and the second switch tube;

[0051] The internal unit 5 is used to receive the first differential signal and the second differential signal and calculate the difference, and identify whether the difference conforms to the first differential range or the second differential range;

[0052] If the difference meets the first difference range and the indoor unit 5 outputs the first digital signal, or the difference meets the second difference range and the indoor unit 5 outputs the second digital signal, the indoor unit 5 is also used to determine that the communication line based on the communication status control module 3 is communicating normally.

[0053] In this embodiment, the first difference range may be ≤2V, and the second difference range may be ≥3V. Of course, the range value may be set according to the operating voltage of the wire controller main chip 1. For example, when the operating voltage is 5V, the maximum value of the first difference range may be 5V, that is, the maximum value of the absolute value difference between the first differential signal and the second differential signal is ≤5V. Similarly, the maximum value of the second difference range may be set similarly. Considering the instability of the voltage, an error value may also be set, and the sum or difference of the error value and the absolute value difference between the first differential signal and the second differential signal does not exceed the maximum value of the range.

[0054] Furthermore, in this embodiment, the relationship of the differential signals that can be recognized by the indoor unit 5 is: if the absolute values ​​of the first differential signal and the second differential signal meet the first differential range ≤ 2V, the indoor unit 5 recognizes it as the first digital signal 0; if the absolute values ​​of the first differential signal and the second differential signal meet the second differential range ≥ 3V, the indoor unit 5 recognizes it as the digital signal 1. Since the absolute values ​​of the first differential signal and the second differential signal will only meet one of the differential ranges, therefore, if one of the above two is met, it can be indicated that the indoor unit 5 and the wire controller main chip 1 can maintain communication based on the communication line where the communication status control module 3 is located.

[0055] Furthermore, the main chip 1 of the wire controller is usually powered by 5V, and can also be powered by 3.3V. The following is explained with a 5V power supply. When communicating based on the conduction circuit of the PNP transistor Q1 and the PNP transistor Q2, when the level of the first differential signal output by the first port is 5V and the level of the second differential signal output by the second port is 0V, or the level of the first differential signal output by the first port is 0V and the level of the second differential signal output by the second port is 5V, the absolute value of the subtraction of the levels of the two I / O ports is ≥3V, and the indoor unit 5 recognizes it as a digital signal 1. At this time, it can be indicated that the communication line based on the communication status control module 3 is communicating normally, and the main chip 1 of the wire controller and the indoor unit 5 can continue to maintain communication based on the communication method of the standby mode. When the first port outputs the first differential signal with a level of 5V and the second port outputs the second differential signal with a level of 5V, or the first port outputs the first differential signal with a level of 0V and the second port outputs the second differential signal with a level of 0V, the absolute value of the difference between the levels of the two I / O ports is ≤2V, and the indoor unit 5 recognizes it as a digital signal 0. At this time, it can also be indicated that the communication line based on the communication status control module 3 is communicating normally, and the wire controller main chip 1 and the indoor unit 5 can continue to maintain communication based on the communication mode of the standby mode. The indoor unit 5 can process various instructions issued by the wire controller main chip 1. In the communication mode based on the communication status control module 3, the baud rate and communication protocol of the communication are consistent with those of the communication chip 2 under normal working conditions.

[0056] In this embodiment, when the communication chip 2 communicates abnormally, the PNP transistor Q1 and the PNP transistor Q2 conduct the circuit, and send out a first differential signal through the first port of the wire controller main chip 1, and send out a second differential signal through the second port, so that the indoor unit 5 can identify according to the first differential signal and the second differential signal. Under the condition that the differential signal relationship that can be recognized by the indoor unit 5 is met, the wire controller main chip 1 and the indoor unit 5 can still communicate when the communication chip 2 fails, thereby improving the reliability of the communication method between the two, maintaining the control function between the wire controller and the air conditioner, and improving the user experience.

[0057] In some optional embodiments, combined with Figure 3 As shown, the communication and power control module 4 includes a first resistor, a second resistor, a first capacitor and a second capacitor;

[0058] The first resistor is connected in series with the first capacitor, and one end of the first resistor is connected to the communication chip 2 and the emitter of the first switch tube, and one end of the first capacitor is connected to the first interface of the indoor unit 5 through the ground wire of the power supply bus;

[0059] The second resistor is connected in series with the second capacitor, and one end of the second resistor is connected to the communication chip 2 and the emitter of the second switch tube, and one end of the second capacitor is connected to the second interface of the indoor unit 5 through the power line of the power supply bus.

[0060] In the present embodiment, the communication and power control module 4 comprises a first resistor R1, a second resistor R2, a first capacitor C1 and a second capacitor C2. Among them, the first capacitor C1 and the second capacitor C2 are non-polar capacitors. The first resistor R1 and the second resistor R2 are matching resistors in the circuit, which are used to optimize the communication quality, and their values ​​are selected according to actual needs. The above-mentioned first capacitor C1 and the second capacitor C2 allow only the constantly changing communication signal to pass through, while the DC power supply on the power supply bus cannot pass through, thereby realizing the isolation of the DC power supply and the coupling of the communication signal. Among them, the DC power supply on the power supply bus is used to convert into the working power supply of each module.

[0061] Furthermore, the first differential signal sent by the wire controller main chip 1 can be coupled to the ground line on the side connected to the indoor unit 5 in the form of a carrier signal after being DC-isolated and AC-connected by the first capacitor C1 connected in series to the ground line of the power supply bus, so as to be transmitted to the first interface of the indoor unit 5. Similarly, the second differential signal sent by the wire controller main chip 1 can be coupled to the power line on the side connected to the indoor unit 5 in the form of a carrier signal after being DC-isolated and AC-connected by the second capacitor C2 connected in series to the power line of the power supply bus, so as to be transmitted to the second interface of the indoor unit 5. By communicating with the indoor unit 5 based on the carrier signal, the wire controller main chip 1 can communicate with the indoor unit 5 even if the communication chip 2 is damaged.

[0062] The capacitance of the first capacitor C1 and the second capacitor C2 can be determined according to the following formula (1):

[0063]

[0064] Among them, X C is the impedance of the capacitor to the AC signal, f is the frequency of the communication signal, and C is the capacitance of the capacitor.

[0065] In this embodiment, by connecting the communication and power control module 4 to the power supply bus, the communication quality can be optimized based on the first resistor R1 and the second resistor R2 in the communication and power control module 4; the constantly changing communication signal can be passed through the first capacitor C1 and the second capacitor C2, while the DC power on the power supply bus cannot pass. For this purpose, the differential signal emitted by the wire controller main chip 1 can be coupled to the power supply bus and transmitted to the indoor unit 5 via the power supply bus, thereby realizing the coupling and separation of the power supply and communication signals.

[0066] In some optional embodiments, combined with Figure 4As shown, it also includes a power conversion module 6, one end of which is connected to the power supply bus, and the other end of which is connected to the wire controller main chip 1 and the communication chip 2, and is used to obtain power from the internal machine 5 and convert it into working power for the wire controller main chip 1 and the communication chip 2.

[0067] In this embodiment, the indoor unit 5 can be connected to 220V mains electricity, and it can be converted into various low voltages required by the indoor unit 5. When the wire controller itself does not have a power supply, the indoor unit 5 provides working power to the wire controller main chip 1 and the communication chip 2 through the power supply bus. Therefore, by connecting one end of the power conversion module 6 to the power supply bus and the other end to the wire controller main chip 1 and the communication chip 2, the indoor unit 5 converts the converted voltage into 5V or 3.3V based on the power supply bus through the power conversion module 6 of the wire controller, which is used by the wire controller main chip 1 and the communication chip 2, so that the wire controller can work normally, for example, converting the 18V voltage provided by the indoor unit 1 into 5V or 3.3V.

[0068] In some optional embodiments, after the wire controller main chip 1 sends a communication signal based on the communication chip 2, the wire controller main chip 1 is also used to receive through the receiving end a feedback signal sent back by the internal machine 5 based on the communication and power control module 4 and the communication chip 2. If no feedback signal is received within a preset time, the wire controller main chip 1 determines that the communication of the communication chip is abnormal.

[0069] In some examples, in the initial stage of establishing communication, the communication chip 2 may have a communication anomaly, but in the initial communication mode, the communication chip 2 is assumed to be communicating normally. Therefore, after the wire controller main chip 1 sends a communication signal through the communication chip 2, it can determine whether the communication chip 2 is faulty based on the feedback signal obtained from the indoor unit. If the indoor unit 5 receives the communication signal, the feedback signal can be returned based on the communication and power control module 4 and the communication chip 2. After the wire controller main chip 1 receives the feedback signal, it determines that the transmission channel constructed based on the communication chip 2 can realize the communication function between the two. For example, the indoor unit 5 feeds back a digital signal 1 to the wire controller main chip 1, indicating that the communication is normal. Of course, if the communication chip 2 has a communication anomaly during the communication process, the communication status of the communication chip 2 can also be confirmed based on the above method.

[0070] In other examples, if the communication signal sent by the wire controller main chip 1 to the indoor unit 5 does not receive a feedback signal returned by the indoor unit 5 within a preset time, the wire controller main chip 1 will determine that the communication is abnormal, and the wire controller can display a fault code at this time, indicating that the indoor unit of the air conditioner cannot be controlled at present, for example: the communication signal is sent at least once within 5 seconds, but no feedback signal is received from the indoor unit 5. By detecting the communication state, it can be identified whether the communication chip 2 is in a communication abnormal state, so as to determine whether to turn on the first switch tube and the second switch tube to enable the standby mode for communication.

[0071] In some optional embodiments, a wire controller display module is further included. The wire controller display module is connected to the wire controller main chip 1 and is used for function display and issuing fault prompt information when communication is abnormal.

[0072] In this embodiment, when the wire controller main chip 1 does not receive the feedback signal from the indoor unit 5, it can send an instruction to display fault prompt information to the wire controller display module, so that the wire controller display module sends out fault prompt information, so that the staff or users can obtain the communication status in time and facilitate timely maintenance of the communication chip.

[0073] In other examples, the wire controller display module can also be used to display other functions. Usually, the wire controller display module is equipped with 6 touch buttons, namely "power on / off", "+", "-", "mode", "function" and "wind speed". These functions can display the current selection on the wire controller display module. However, since the differential signal sent by the wire controller main chip 1 is not converted by the communication chip 2 when the communication chip 2 is abnormal, the stability will decrease. Therefore, the wire controller main chip 1 can not only control the wire controller display module to display the fault icon, but also the touch buttons only have the two buttons of "power on / off" and "mode" for users to use easily. At this time, when the user presses the "power on / off" power button, the air conditioner also turns on the automatic wind speed mode. When touching the "mode" button, you can control functions such as "cooling", "heating", "air supply" and "dehumidification", so that some functions can be used by users, meet the basic needs of users, and improve the user experience.

[0074] In an embodiment of the present application, a wire controller is further provided, comprising the communication circuit based on the wire controller in any of the above embodiments.

[0075] In this embodiment, the wire controller including the communication circuit based on the wire controller can also implement various embodiments of the communication circuit based on the wire controller and achieve corresponding technical effects, which will not be elaborated here.

[0076] In an embodiment of the present application, an air conditioning system is also provided, the air conditioner comprising:

[0077] at least one internal unit 5;

[0078] And like the wire controller in the above embodiment, the wire controller communicates with the indoor unit 5 based on the communication circuit based on the wire controller.

[0079] In this embodiment, when the air conditioning system is a multi-unit air conditioning system, it can include multiple indoor units 5, and each indoor unit 5 communicates with the wire controller to achieve data interaction. In addition, during the communication between each indoor unit 5 and the wire controller, if the communication chip 2 of the wire controller fails and there is a communication abnormality, the communication mode can also be switched through the communication circuit based on the wire controller, and various embodiments based on the communication circuit of the wire controller can be implemented and the corresponding technical effects can be achieved, which will not be repeated here.

[0080] In the embodiment of the present application, the communication program corresponding to the communication circuit based on the wire controller can be placed in a random access memory (RAM), a memory, a read-only memory (ROM), an electrically programmable ROM, an electrically erasable programmable ROM, a register, a hard disk, a removable disk, a CD-ROM or any other form of storage medium known in the technical field.

[0081] It should be noted that, in this article, relational terms such as first, second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms include, include or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or device including the elements. Among them, electronic components can be connected by electrical connection.

[0082] The above is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A communication circuit based on a wire controller, characterized in that: include: Wire controller main chip, communication chip, communication status control module, communication and power control module and indoor unit; The wire controller main chip is connected to the communication chip and one end of the communication state control module, the other end of the communication state control module and the communication chip is connected to one end of the communication and power control module, and the other end of the communication and power control module is connected to the indoor unit through a power supply bus; When the communication chip communicates normally, the communication chip is used to convert the communication signal sent by the wire controller main chip, and perform signal coupling with the power control module based on the communication, so as to couple the converted communication signal to the power bus, and output it to the indoor unit through the power bus; When the communication chip communicates abnormally, the communication status control module is used to conduct the connection between the wire controller main chip and the communication and power control module, and transmit the communication signal sent by the wire controller main chip to the communication and power control module for signal coupling, so as to couple the communication signal to the power supply bus and transmit it to the indoor unit through the power supply bus.

2. The communication circuit based on the wire controller according to claim 1, characterized in that: The wire controller main chip includes a first port, a second port and a third port; When the communication chip communicates normally, the first port of the wire controller main chip is a receiving end, the second port of the wire controller main chip is a transmitting end, and the third port of the wire controller main chip is an enabling end; When the communication chip is in communication abnormality, the first port and the second port of the wire controller main chip are transmitting ends, and the third port of the wire controller main chip is an enabling end.

3. The communication circuit based on the wire controller according to claim 2, characterized in that: The communication state control module includes a first switch tube and a second switch tube; The bases of the first switch tube and the second switch tube are connected to the third port of the wire controller main chip, the collector of the first switch tube is connected to the first port of the wire controller main chip, the collector of the second switch tube is connected to the second port of the wire controller main chip, and the emitters of the first switch tube and the second switch tube are connected to the communication and power control module.

4. The communication circuit based on the wire controller according to claim 3, characterized in that: When the communication chip is abnormal in communication, the first port of the wire controller main chip is used to output a first differential signal to the collector of the first switch tube, the second port of the wire controller main chip is used to output a second differential signal to the collector of the second switch tube, and the third port of the wire controller main chip is used to output a high level signal to the base of the first switch tube and the second switch tube; The indoor unit is used to receive the first differential signal and the second differential signal and calculate the difference, and identify whether the difference conforms to the first difference range or the second difference range; If the difference meets the first difference range and the indoor unit outputs a first digital signal, or the difference meets the second difference range and the indoor unit outputs a second digital signal, the indoor unit is also used to determine that the communication line based on the communication status control module is communicating normally.

5. The communication circuit based on the wire controller according to claim 3, characterized in that: The communication and power control module includes a first resistor, a second resistor, a first capacitor and a second capacitor; The first resistor is connected in series with the first capacitor, and one end of the first resistor is connected to the communication chip and the emitter of the first switch tube, and one end of the first capacitor is connected to the first interface of the indoor unit through the ground wire of the power supply bus; The second resistor is connected in series with the second capacitor, and one end of the second resistor is connected to the communication chip and the emitter of the second switch tube, and one end of the second capacitor is connected to the second interface of the indoor unit through the power line of the power supply bus.

6. The communication circuit based on the wire controller according to claim 1, characterized in that: It also includes a power conversion module, one end of which is connected to the power supply bus, and the other end of which is connected to the wire controller main chip and the communication chip, and is used to obtain power from the internal machine and then convert it into working power for the wire controller main chip and the communication chip.

7. The communication circuit based on the wire controller according to claim 2, characterized in that: After the wire controller main chip sends a communication signal based on the communication chip, the wire controller main chip is also used to receive, through a receiving end, a feedback signal sent back by the indoor unit based on the communication and power control module and the communication chip. If the feedback signal is not received within a preset time, the wire controller main chip determines that the communication chip has communication abnormalities.

8. The communication circuit based on the wire controller according to claim 7, characterized in that: It also includes a wire controller display module, which is connected to the wire controller main chip and is used for function display and issuing fault prompt information when communication is abnormal.

9. A wire controller, characterized in that: The invention comprises a communication circuit based on a wire controller as claimed in any one of claims 1 to 8.

10. An air conditioning system, characterized in that: The air conditioner comprises: At least one internal unit; And the wired controller as claimed in claim 9, wherein the wired controller communicates with the indoor unit based on the communication circuit based on the wired controller.

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